US3724465A - Tampon coated with insertion aid and method for coating - Google Patents

Tampon coated with insertion aid and method for coating Download PDF

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US3724465A
US3724465A US00165134A US3724465DA US3724465A US 3724465 A US3724465 A US 3724465A US 00165134 A US00165134 A US 00165134A US 3724465D A US3724465D A US 3724465DA US 3724465 A US3724465 A US 3724465A
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tampon
coating
polyethylene glycol
coated
fumed silica
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D Duchane
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Kimberly Clark Corp
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    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00Bandages or dressings; Absorbent pads
    • A61F13/15Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/20Tampons, e.g. catamenial tampons; Accessories therefor
    • A61F13/2051Tampons, e.g. catamenial tampons; Accessories therefor characterised by the material or the structure of the inner absorbing core
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00Bandages or dressings; Absorbent pads
    • A61F13/15Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/20Tampons, e.g. catamenial tampons; Accessories therefor
    • A61F13/2082Apparatus or processes of manufacturing
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00Bandages or dressings; Absorbent pads
    • A61F13/15Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/20Tampons, e.g. catamenial tampons; Accessories therefor
    • A61F13/2002Tampons, e.g. catamenial tampons; Accessories therefor characterised by the use
    • A61F13/202Catamenial tampons
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00Bandages or dressings; Absorbent pads
    • A61F13/15Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/84Accessories, not otherwise provided for, for absorbent pads
    • A61F13/8405Additives, e.g. for odour, disinfectant or pH control
    • A61F2013/8455Additives, e.g. for odour, disinfectant or pH control being lubricants
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10STECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S604/00Surgery
    • Y10S604/904Tampons

Definitions

  • ABSTRACT A compressed absorbent tampon provided with an improved insertion-aid coating on at least the tip portion and a method for applying the improved coating and similar coatings to the tampon.
  • the improved coating comprises a normally solid polyethylene glycol containing at least one stabilizing agent. Suitable agents include water-insoluble metal stearates and/or fumed silica.
  • an important object of the present invention is to provide an improved insertion-aid coating for precompressed tampons which coating remains stable during long term shipment and storage.
  • Another object is to provide a suitable method for applying the improved coating and similar coating materials to precompressed tampons.
  • a polyethylene glycol lubricant material which is normally solid at room temperature, is heated and thereby melted to a mobile fluid state.
  • An adjuvant material selected from the group consisting of water-insoluble metal stearates and fumed silica or mixtures thereof is dispersed in the melted polyethylene glycol.
  • a small metered amount of this melted mixture is injected into a smooth-surface die having a cavity of a configuration conforming-to the configuration of the tip of a precompressed tampon which is to be coated. The die is maintained at a temperature less than the melting point of the mixture.
  • the mixture When the mixture is injected into the cooled die cavity it forms a head which becomes partially congealed on its outer surface due to contact with the cooled cavity, but the major portion of the interior remains fluid and mobile.
  • the tip of the precompressed tampon is pressed into the cavity containing the internally mobile mixture whereby the mixture is molded around the tampon tip to form a smooth cast coating.
  • the molded coating readily releases from the cavity without leaving residue. Apparently this is due to the lubricating properties of the adjuvant as well as the slight shrinkage of the coating as it hardens.
  • the tampon tip is thus provided with a smoothly molded coating.
  • the tampon may also be axially rotated in the die during the molding operation. This axial rotation step speeds up the setting or hardening of the coating, which is desirable when using lower molecular weight polymers. It also results in a dull, matte surface rather than the smooth cast surface noted above.
  • the dispersed adjuvant has other functions which improve performance and appearance of the finished tampons.
  • One is that it stabilizes the polyethylene glycol coating so that the coating remains in fresh condition and does not migrate into the tampon or leave a dry surface even after a prolonged exposure at temperatures of F.
  • Another is that it provides an opaque color and cosmetic appearance to the coated surface.
  • FIG. 1 is a schematic illustration of a means suitable for carrying out the method for coating tampons in accordance with this invention.
  • FIG. 2 is a section of a die cavity taken at 2-2 of FIG. 1 showing a metered amount of lubricant mixture disposed therein.
  • FIG. 3 is a section similar to FIG. 2 taken at 3-3 of FIG. 1 showing a tampon pressed into the die cavity with the lubricant mixture molded around the tampon tip.
  • FIG. 4 is a perspective view of a tampon with a cast coating of lubricant on the tip thereof.
  • this invention is particularly directed to an improved insertion-aid coating for precompressed self-sustaining tampons and a method for applying the coating while in a mobile condition to the tip portion of the tampon.
  • the primary coating material is a normally solid polyethylene glycol and the improvement comprises the addition of particular stabilizing agents to the polyethylene glycol.
  • the preferred tampon 30 comprises a body of absorbent material compressed to a self-sustaining cylindrical shape with a substantially hermispheric frontal portion or tip, and having a withdrawal string 31 attached to the rear portion.
  • the tampon may be adapted for use for stick insertion by having an axially extending socket 32 centrally drilled part way into the rear portion into which a removable stick 33 may be seated. For digital insertion, the socket is not required.
  • FIG. 1 illustrates one method for carrying out the invention.
  • the numeral 11 generally indicates a melting, mixing and injecting device for the polyethylene-glycol.
  • the device as shown comprises a heated tank 12 into which a normally solid polyethylene glycol is melted to a fluid state as indicated at 13.
  • a small amount of a finely-powdered water-insoluble adjuvant selected from the group consisting of metal stearates and/or fumed silica is introduced into tank 12 through port 14 and dispersed in the melted polyethylene glycol by mixing device 15 driven by motor 16.
  • the mixer is run continuously to provide a uniform dispersion.
  • an extruder or ejector means 18 Connected to tank 12 is an extruder or ejector means 18 which is also equipped with a metering device 17 for metering the amount of the fluid polyethylene glycol mixture it is desired to eject.
  • a rotatable turntable 19 is disposed beneath ejector 18.
  • the upper face of turntable 19 is provided with series of die cavities 20 disposed adjacent the circumference.
  • Each die cavity 20 has an interior configuration which substantially conforms tothe shape of the tampon it is desired to coat.
  • the cavity shown is hemispheric and conforms to the rounded tampon tip shown in the drawings.
  • the interior of turntable 20 is hollow and is preferably filled with a circulating coolant fluid 21 (FIGS. 2 and 3) which surrounds the outer wall of cavities 20 depending from the top wall of turntable 19 to maintain the dies 20 at a temperature below the melting point of the polyethylene glycol mixture.
  • the coolant is fed through axially disposed tube 22 and removed at 23 through a concentric channel as indicated.
  • a metered amount 24 of the melted polyethylene glycol mixture containing the specified adjuvant is injected in timed sequence into each of the cavities 20 on turntable 19 as each cavity is rotated underneath ejector means 18.-
  • the turntable 19 may, of course, be rotated continuously or intermittently as desired.
  • the ejected fluid 24 forms a bead 25 in the bottom of the cavity as shown in FIG. 2. It will be seen that in this condition only a small portion of the bead surface is in contact with the cooled surface of the die cavity, so that only a small surface area of the bead 25 will congeal or start to solidify while the major'portion remains mobile.
  • the turntable continues to rotate past the ejection device, and the tip of a tampon 20 is pressed into the mixture-containing cavity at station B.
  • the tampon tip As the tampon tip is pressed into the cavity it causes the polyethylene glycol mixture to flow and mold itself around the tampon tip in the form of a thin cast coating as shown at 34 in FIGS. 3 and 4. As the turntable l9 continues to rotate the cooling liquid 21 surrounding the die cavity reduces the temperature of the molded polyethylene glycol mixture below its melting point, causing the mixture to rapidly congeal and harden into a solidified condition.
  • the coated tampon with a molded cap 34 of the polymer mixture on the tip thereof, as shown in FIG. 4, is then removed at station C. If desired the tampon may also be rotated axially on itself as turntable moves the tampon from station B to station C. This axial rotation step speeds up the hardening of the coating, but results in a dull, matte finish.
  • This easy release may be attributed to the additional lubricating ability contributed by the adjuvant, but may also come from the fact that the polyethylene glycol takes a firmer set with the adjuvant mixed therein.
  • Tampons with hemispherical tips as shown in the drawings were coated in the manner described with each of the formulations described below.
  • polyethylene glycol with an average molecular weight of 1,000 is identified as PEG 1,000 and polyethylene glycol with an average molecular weight of 4,000 is identified as PEG 4,000. All parts are parts by weight.
  • the PEG 1,000 was heated to about 158F. to reduce it to a fluid state.
  • the die cavity was maintained at about room temperature.
  • Example A PEG 1,000 alone.
  • Example B Ten parts PEG 1,000, 1 part fumed silica.
  • Example C Ten parts PEG 1,000, 1 part fumed silica, 1 part magnesium stearate.
  • Example D Ten parts PEG 1,000, 1 part fumed silica, 1 part aluminum stearate.
  • Example E Ten parts PEG 1,000, 1 part fumed silica, 1 part zinc stearate.
  • Example F Ten parts PEG 1,000, 1 part fumed silica, 1 part calcium stearate.
  • Example G Ten parts PEG 1,000, 1 part magnesium stearate.
  • Example H Ten parts PEG 1,000, 1 part aluminum stearate. 7
  • Example I Ten parts PEG 1,000, 1 part zinc stearate.
  • Example J Ten parts PEG 1,000, 1 part calcium stearate.
  • Example A coating consisting of PEG 1,000. alone had completely migrated into the tampon.
  • the coating formulations consisting of PEG 1,000 and fumed silica (Example B) as well as those containing PEG 1,000, fumed silica and a metal stearate (Examples C, D, E, F) all remained on the surface of the tampons and retained essentially all of their original smoothness and lubricity.
  • the metal stearate and fumed silica is added to the coating by simply blending it into the hot PEG melt.
  • the fumed silica has been found to exert a thixotropic effect upon the formulation. That is, the formulation containing fumed silica remains very fluid while it is being stirred but when stirring stops, the formulation begins to thicken, eventually reaching a marshmallow type consistency. Upon stirring, the structure is rapidly broken down and the formulation becomes very fluid once more.
  • This thixotropic effect has been found to be advantageous for tampon coatings.
  • the tampon is coated with the formulation in the hot fluid state so that the mixture readily flows around the tip as it is pressed into the die.
  • the coating does not become fluid when similar temperatures are reached during storage of the coated tampon due to the absence of physical agitation. It is believed this phenomenon also aids in preventing migration of the coating into the body of the tampon.
  • Fumed silica is silicon dioxide formed by the vapor phase hydrolysis of silicon tetrachloride. It is supplied as a low density water-insoluble powder with extremely small particle size and a large surface area. Although it is insoluble, the powder forms a clear, colloidal suspension in water.
  • the grade of fumed silica used in the Examples described is sold under the trademark CAB-O SIL by Cabot Corporation. it has been approved by the FDA for use in foods and pharmaceuticals.
  • the metal stearates may be used in their conventional commercial form which are water-insoluble powders. FDA approved grades should of course be used.
  • the polyethylene glycol should be one that is normally solid at room temperature. While PEG 600 has a melting point range of about 68F to 77F and can meet the definition, it is marginal in performance, and it is preferred that polyethylene glycols with an average molecular weight of about 1,000 and above be used. The preferred range is from about 1,000 to about 6,000. Lower molecular weight polymers may of course be used in admixture with higher weight polymers to obtain average molecular weights in the preferred range. Methoxy polyethylene glycol with an average molecular weight of about 750 may also be used.
  • the described method has been found to be superior to the older methods of dipping the compressed tampon tip into the molten polyethylene glycol or of spraying partially congealed material onto the tip. By the described method much better control over the thickness and uniformity of the applied coating is possible. In addition, less coating material is required,
  • An absorbent cylindrical tampon having a stabilized insertion-aid coating on at least the tip portion thereof, said tampon comprising a compressed selfsustaining body of absorbent material and said coating comprising a molded cap of normally solid polyethylene glycol having dispersed therethrough a minor portion of a finely-powdered water-insoluble adjuvant selected from the group consisting of metal stearates and fumed silica.
  • coated tampon of claim 1 wherein said metal stearates are selected from the group consisting of aluminum, calcium, magnesium and zinc stearate.
  • coated tampon of claim 1 wherein said polyethylene glycol has an average molecular weight in the range of about 1,000 to about 6,000.
  • coated tampon of claim 1 wherein said polyethylene glycol is a methoxy polyethylene glycol with an average molecular weight of about 0.
  • said adjuvant comprises fumed silica and a metal stearate selected from the group consisting of aluminum, calcium, magnesium and zinc stearate.

Abstract

A compressed absorbent tampon provided with an improved insertion-aid coating on at least the tip portion and a method for applying the improved coating and similar coatings to the tampon. The improved coating comprises a normally solid polyethylene glycol containing at least one stabilizing agent. Suitable agents include water-insoluble metal stearates and/or fumed silica.

Description

United States Patent [1 1 Duchane 51 Apr. 3, 1973 [54] TAMPON COATED WITH INSERTION AID AND METHOD FOR COATING [75] Inventor: David V. Duchane, Menasha, Wis.
[73] Assignce: Kimberly-Clark Corporation,
Neenah, Wis.
[22] Filed: July 22, 1971 [21] Appl. N0.: 165,134
[52] US. Cl ..128/285 [51] Int. Cl..... ..A61t 13/20 [58] Field of Search ..128/263, 270, 285
y [5 6] References Cited UNITED STATES PATENTS 2,301,868 11/1942 Gurley, Jr. et al ..l28/285 2,734,505 2/1956 Parish ..128/285 2,808,832 10/1957 Myers et al ..l28/285 3,393,678 7/1968 Pacini ..l28/270 3,428,044 2/ 1969 Whitehead eta1. ..l28/285 3,595,236 7/1971 Corrigan et a] ..128/285 Primary Examiner-Charles F. Rosenbaum Attorney-Daniel J. Hanlon, Jr. et al.
57 ABSTRACT A compressed absorbent tampon provided with an improved insertion-aid coating on at least the tip portion and a method for applying the improved coating and similar coatings to the tampon. The improved coating comprises a normally solid polyethylene glycol containing at least one stabilizing agent. Suitable agents include water-insoluble metal stearates and/or fumed silica.
6 Claims, 4 Drawing Figures TAMPON COATED WITH INSERTION AID AND METHOD FOR COATING BACKGROUND OF THE INVENTION In the manufacture of compressed absorbent tampons, and especially those of the type which are inserted into body cavities without the aid of an insertion tube or a lubricous cover and thus present an inherently dry surface to the body, it is desirable to coat at least the leading end or tip of the tampon with an insertion-aiding lubricant. A problem which has long plagued the industry is to find a suitable coating which will retain its lubricating ability under the severe temperature variations to which tampons are subjected during normal shipping and warehousing and yet which will dissolve readily under use conditions. The patented art is replete with proposed solutions to this problem. While some aspects are successfully solved by the various proposals, others seem to appear with vexing'regularity. It is well known, for example, as described in assignees U.S. Pat. No. 3,428,044 of Feb. 18, 1969, that normally solid polyethylene glycols of an average molecular weight of about 1,000 and above, when coated on the tip of a precompressed tampon will provide a surface lubricity suitable for use as an insertion aid. However, it was found that at the elevated temperatures which frequently occur in warehousing and shipping, this type of coating softens enough to permit migration of the coating into the body of the tampon. Under such conditions the surface where the coating had been applied then eventually reverts in appearance and feel to that of an uncoated tampon. As a result the desired lubricity is lost. In assignees U.S. application Ser. No. 807,490 filed Mar. 17, 1969 and now U.S. Pat. No. 3,595,236 a more stable polyethylene glycol coating is described in which the stability and opacity of mixtures of specified molecular weight polyethylene glycols are improved by the addition of starch. While this composition was found to be an improvement over earlier type coatings, it still lacked the desired long term stability. This invention is directed to a polyethylene glycol coating formulation which overcomes most of the disadvantages formerly encountered. A preferred method of applying the coating to a tampon tip is also disclosed.
Accordingly, an important object of the present invention is to provide an improved insertion-aid coating for precompressed tampons which coating remains stable during long term shipment and storage.
Another object is to provide a suitable method for applying the improved coating and similar coating materials to precompressed tampons.
SUMMARY OF THE INVENTION A polyethylene glycol lubricant material which is normally solid at room temperature, is heated and thereby melted to a mobile fluid state. An adjuvant material selected from the group consisting of water-insoluble metal stearates and fumed silica or mixtures thereof is dispersed in the melted polyethylene glycol. A small metered amount of this melted mixture is injected into a smooth-surface die having a cavity of a configuration conforming-to the configuration of the tip of a precompressed tampon which is to be coated. The die is maintained at a temperature less than the melting point of the mixture. When the mixture is injected into the cooled die cavity it forms a head which becomes partially congealed on its outer surface due to contact with the cooled cavity, but the major portion of the interior remains fluid and mobile. The tip of the precompressed tampon is pressed into the cavity containing the internally mobile mixture whereby the mixture is molded around the tampon tip to form a smooth cast coating. When the tampon is withdrawn, the molded coating readily releases from the cavity without leaving residue. Apparently this is due to the lubricating properties of the adjuvant as well as the slight shrinkage of the coating as it hardens. The tampon tip is thus provided with a smoothly molded coating. The tampon may also be axially rotated in the die during the molding operation. This axial rotation step speeds up the setting or hardening of the coating, which is desirable when using lower molecular weight polymers. It also results in a dull, matte surface rather than the smooth cast surface noted above.
In addition to facilitating residue-free release from the cavity the dispersed adjuvant has other functions which improve performance and appearance of the finished tampons. One is that it stabilizes the polyethylene glycol coating so that the coating remains in fresh condition and does not migrate into the tampon or leave a dry surface even after a prolonged exposure at temperatures of F. Another is that it provides an opaque color and cosmetic appearance to the coated surface.
BRIEF DESCRIPTION OF THE DRAWINGS In the drawings:
FIG. 1 is a schematic illustration of a means suitable for carrying out the method for coating tampons in accordance with this invention.
FIG. 2 is a section of a die cavity taken at 2-2 of FIG. 1 showing a metered amount of lubricant mixture disposed therein.
FIG. 3 is a section similar to FIG. 2 taken at 3-3 of FIG. 1 showing a tampon pressed into the die cavity with the lubricant mixture molded around the tampon tip.
FIG. 4 is a perspective view of a tampon with a cast coating of lubricant on the tip thereof.
DESCRIPTION OF THE PREFERRED EMBODIMENTS As indicated above, this invention is particularly directed to an improved insertion-aid coating for precompressed self-sustaining tampons and a method for applying the coating while in a mobile condition to the tip portion of the tampon. The primary coating material is a normally solid polyethylene glycol and the improvement comprises the addition of particular stabilizing agents to the polyethylene glycol.
As shown in FIG. 4 of the drawings, the preferred tampon 30 comprises a body of absorbent material compressed to a self-sustaining cylindrical shape with a substantially hermispheric frontal portion or tip, and having a withdrawal string 31 attached to the rear portion. The tampon may be adapted for use for stick insertion by having an axially extending socket 32 centrally drilled part way into the rear portion into which a removable stick 33 may be seated. For digital insertion, the socket is not required.
FIG. 1 illustrates one method for carrying out the invention. The numeral 11 generally indicates a melting, mixing and injecting device for the polyethylene-glycol. The device as shown comprises a heated tank 12 into which a normally solid polyethylene glycol is melted to a fluid state as indicated at 13. A small amount of a finely-powdered water-insoluble adjuvant selected from the group consisting of metal stearates and/or fumed silica is introduced into tank 12 through port 14 and dispersed in the melted polyethylene glycol by mixing device 15 driven by motor 16. Preferably the mixer is run continuously to provide a uniform dispersion. Connected to tank 12 is an extruder or ejector means 18 which is also equipped with a metering device 17 for metering the amount of the fluid polyethylene glycol mixture it is desired to eject.
A rotatable turntable 19 is disposed beneath ejector 18. The upper face of turntable 19 is provided with series of die cavities 20 disposed adjacent the circumference. Each die cavity 20 has an interior configuration which substantially conforms tothe shape of the tampon it is desired to coat. The cavity shown is hemispheric and conforms to the rounded tampon tip shown in the drawings. The interior of turntable 20 is hollow and is preferably filled with a circulating coolant fluid 21 (FIGS. 2 and 3) which surrounds the outer wall of cavities 20 depending from the top wall of turntable 19 to maintain the dies 20 at a temperature below the melting point of the polyethylene glycol mixture. The coolant is fed through axially disposed tube 22 and removed at 23 through a concentric channel as indicated. i I
In operation, a metered amount 24 of the melted polyethylene glycol mixture containing the specified adjuvant is injected in timed sequence into each of the cavities 20 on turntable 19 as each cavity is rotated underneath ejector means 18.- The turntable 19 may, of course, be rotated continuously or intermittently as desired. a
The ejected fluid 24 forms a bead 25 in the bottom of the cavity as shown in FIG. 2. It will be seen that in this condition only a small portion of the bead surface is in contact with the cooled surface of the die cavity, so that only a small surface area of the bead 25 will congeal or start to solidify while the major'portion remains mobile. After each cavity receives an injection of the coating mixture, the turntable continues to rotate past the ejection device, and the tip of a tampon 20 is pressed into the mixture-containing cavity at station B.
As the tampon tip is pressed into the cavity it causes the polyethylene glycol mixture to flow and mold itself around the tampon tip in the form of a thin cast coating as shown at 34 in FIGS. 3 and 4. As the turntable l9 continues to rotate the cooling liquid 21 surrounding the die cavity reduces the temperature of the molded polyethylene glycol mixture below its melting point, causing the mixture to rapidly congeal and harden into a solidified condition. The coated tampon with a molded cap 34 of the polymer mixture on the tip thereof, as shown in FIG. 4, is then removed at station C. If desired the tampon may also be rotated axially on itself as turntable moves the tampon from station B to station C. This axial rotation step speeds up the hardening of the coating, but results in a dull, matte finish.
In the above-described process, it was found that the use of the specified adjuvant permits easy removal of the coated tampon from the die, leaving no residue.
This easy release may be attributed to the additional lubricating ability contributed by the adjuvant, but may also come from the fact that the polyethylene glycol takes a firmer set with the adjuvant mixed therein.
The following Examples will set forth several specific embodiments of the invention.
Tampons with hemispherical tips as shown in the drawings were coated in the manner described with each of the formulations described below. In these formulas, polyethylene glycol with an average molecular weight of 1,000 is identified as PEG 1,000 and polyethylene glycol with an average molecular weight of 4,000 is identified as PEG 4,000. All parts are parts by weight. In each instance, the PEG 1,000 was heated to about 158F. to reduce it to a fluid state. The die cavity was maintained at about room temperature.
Example A. PEG 1,000 alone.
Example B. Ten parts PEG 1,000, 1 part fumed silica.
Example C. Ten parts PEG 1,000, 1 part fumed silica, 1 part magnesium stearate.
Example D. Ten parts PEG 1,000, 1 part fumed silica, 1 part aluminum stearate.
Example E. Ten parts PEG 1,000, 1 part fumed silica, 1 part zinc stearate.
Example F. Ten parts PEG 1,000, 1 part fumed silica, 1 part calcium stearate.
Example G. Ten parts PEG 1,000, 1 part magnesium stearate.
Example H. Ten parts PEG 1,000, 1 part aluminum stearate. 7
Example I. Ten parts PEG 1,000, 1 part zinc stearate.
Example J. Ten parts PEG 1,000, 1 part calcium stearate.
After tampons were coated with each of these mixtures, they were placedin a forced air oven at F. for 16 hours. At the end of that time, the Example A coating consisting of PEG 1,000. alone had completely migrated into the tampon. The coating formulations consisting of PEG 1,000 and fumed silica (Example B) as well as those containing PEG 1,000, fumed silica and a metal stearate (Examples C, D, E, F) all remained on the surface of the tampons and retained essentially all of their original smoothness and lubricity. Those formulations containing PEG 1,000 and a metal stearate (Examples G, H, I, J) remained on the surfaceof the tampon but appeared to lose some lubricity. However, this loss was not enough to make the coating defective. The coatings containing PEG 1,000 and the zinc stearate, the magnesium stearate, and the calcium stearate were'a little drier and stickier than similar coatings which also contained fumed silica, while the coating containing PEG 1,000 and aluminum stearate took on a somewhat mottled appearance which was absent in the same coating containing fumed silica. In each case, however, the desired stability was present.
It will be noted therefore that while the metal stearate may be used alone, the combination of stearates with fumed silica is superior.
The above experiments were repeated except that in 'each of the formulations PEG 4,000 was used instead of PEG 1,000. Each of the coated tampons were heated for l6 hours at 150F to test stability. The results were substantially the same as those obtained when PEG 1,000 was used in the formulas.
In each case the metal stearate and fumed silica is added to the coating by simply blending it into the hot PEG melt. The fumed silica has been found to exert a thixotropic effect upon the formulation. That is, the formulation containing fumed silica remains very fluid while it is being stirred but when stirring stops, the formulation begins to thicken, eventually reaching a marshmallow type consistency. Upon stirring, the structure is rapidly broken down and the formulation becomes very fluid once more.
This thixotropic effect has been found to be advantageous for tampon coatings. The tampon is coated with the formulation in the hot fluid state so that the mixture readily flows around the tip as it is pressed into the die. However, because it is thixotropic when containing fumed silica, the coating does not become fluid when similar temperatures are reached during storage of the coated tampon due to the absence of physical agitation. It is believed this phenomenon also aids in preventing migration of the coating into the body of the tampon.
Fumed silica is silicon dioxide formed by the vapor phase hydrolysis of silicon tetrachloride. It is supplied as a low density water-insoluble powder with extremely small particle size and a large surface area. Although it is insoluble, the powder forms a clear, colloidal suspension in water. The grade of fumed silica used in the Examples described is sold under the trademark CAB-O SIL by Cabot Corporation. it has been approved by the FDA for use in foods and pharmaceuticals.
The metal stearates may be used in their conventional commercial form which are water-insoluble powders. FDA approved grades should of course be used.
As indicated above, the polyethylene glycol should be one that is normally solid at room temperature. While PEG 600 has a melting point range of about 68F to 77F and can meet the definition, it is marginal in performance, and it is preferred that polyethylene glycols with an average molecular weight of about 1,000 and above be used. The preferred range is from about 1,000 to about 6,000. Lower molecular weight polymers may of course be used in admixture with higher weight polymers to obtain average molecular weights in the preferred range. Methoxy polyethylene glycol with an average molecular weight of about 750 may also be used.
While the description of the specific examples have been confined to polyethylene glycol and adjuvant mixtures, it will readily be seen that the method of application itself can readily be used for other coatings which are solid at room temperature but fluid at elevated temperature.
The described method has been found to be superior to the older methods of dipping the compressed tampon tip into the molten polyethylene glycol or of spraying partially congealed material onto the tip. By the described method much better control over the thickness and uniformity of the applied coating is possible. In addition, less coating material is required,
providing advantages in both economy and performance.
While the resulting coating dissolves somewhat more slowly in body fluids than fresh polyethylene glycol coatings lacking a stabilizer, the fact that the method provides better control in applying a smaller amount of stable coating in a small confined area of the tip overcomes any disadvantage the slower solubility may have. As a result, the overall absorbence of the tampon is not deleteriously affected.
What is claimed is:
1. An absorbent cylindrical tampon having a stabilized insertion-aid coating on at least the tip portion thereof, said tampon comprising a compressed selfsustaining body of absorbent material and said coating comprising a molded cap of normally solid polyethylene glycol having dispersed therethrough a minor portion of a finely-powdered water-insoluble adjuvant selected from the group consisting of metal stearates and fumed silica.
2. The coated tampon of claim 1 wherein said metal stearates are selected from the group consisting of aluminum, calcium, magnesium and zinc stearate.
3. The coated tampon of claim 1 wherein said adjuvant is present in said mixture in the amount of from about 5 percent to about 15 percent by weight.
4. The coated tampon of claim 1 wherein said polyethylene glycol has an average molecular weight in the range of about 1,000 to about 6,000.
5. The coated tampon of claim 1 wherein said polyethylene glycol is a methoxy polyethylene glycol with an average molecular weight of about 0.
6. The coated tampon of claim 1 wherein said adjuvant comprises fumed silica and a metal stearate selected from the group consisting of aluminum, calcium, magnesium and zinc stearate.
a a s s a:

Claims (5)

  1. 2. The coated tampon of claim 1 wherein said metal stearates are selected from the group consisting of aluminum, calcium, magnesium and zinc stearate.
  2. 3. The coated tampon of claim 1 wherein said adjuvant is present in said mixture in the amount of from about 5 percent to about 15 percent by weight.
  3. 4. The coated tampon of claim 1 wherein said polyethylene glycol has an average molecular weight in the range of about 1,000 to about 6,000.
  4. 5. The coated tampon of claim 1 wherein said polyethylene glycol is a methoxy polyethylene glycol with an average molecular weight of about 750.
  5. 6. The coated tampon of claim 1 wherein said adjuvant comprises fumed silica and a metal stearate selected from the group consisting of aluminum, calcium, magnesium and zinc stearate.
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Publication number Priority date Publication date Assignee Title
US3805785A (en) * 1972-06-06 1974-04-23 P Marginet Feminine use pads
US3884233A (en) * 1973-09-04 1975-05-20 Betty Louise Summey Tampon and suppository combination
US3932322A (en) * 1975-03-07 1976-01-13 Kimberly-Clark Corporation Water absorbing starch-acrylonitrile graft copolymers fumed silica or alumina modified to improve rate of absorption for physiological fluids
US4373631A (en) * 1979-04-24 1983-02-15 Dr. Carl Hahn G.M.B.H. Tampon pack especially for a coated tampon containing medicaments
US4582717A (en) * 1982-02-06 1986-04-15 Bayer Aktiengesellschaft Process for production of vaginal tampons containing pharmaceutical active compound
GB2203949A (en) * 1987-05-02 1988-11-02 Smith & Nephew Ass Absorbent tampon
EP0685213A2 (en) 1994-05-31 1995-12-06 Kimberly-Clark Corporation Tampon with integral cover
EP0692263A2 (en) 1994-06-24 1996-01-17 McNEIL-PPC, INC. Method of reducing the coefficient of friction of absorbent products and wax coated products produced thereby
US5744150A (en) * 1997-01-29 1998-04-28 Xomed Surgical Products, Inc. Softened antimicrobial sponge material with color change indication of antimicrobial activity
US6096332A (en) * 1998-06-30 2000-08-01 Mcneil-Ppc, Inc. Adding pharmaceutically active compounds to substrates
WO2000051499A1 (en) * 1999-03-05 2000-09-08 Sub-Q, Inc. System and method for facilitating hemostasis of blood vessel punctures with absorbable sponge
EP0988847A3 (en) * 1998-09-24 2001-05-30 Rauscher Consumer Products GmbH Tampon and tampon package
US20020120242A1 (en) * 2000-12-22 2002-08-29 Tyrrell David John Absorbent articles with hydrophilic compositions containing botanicals
US20020120241A1 (en) * 2000-12-22 2002-08-29 Tyrrell David John Absorbent articles with hydrophilic compositions containing anionic polymers
US20020128615A1 (en) * 2000-12-22 2002-09-12 Tyrrell David John Absorbent articles with non-aqueous compositions containing anionic polymers
US20020156495A1 (en) * 1995-09-15 2002-10-24 Rodney Brenneman Apparatus and method for percutaneous sealing of blood vessel punctures
US20020173760A1 (en) * 1999-12-29 2002-11-21 Jean-Bastien Pasquini Antiseptic tampon and method of preparing it
US20020190226A1 (en) * 2001-03-12 2002-12-19 Mark Ashby Methods for sterilizing cross-linked gelatin compositions
US6503526B1 (en) 2000-10-20 2003-01-07 Kimberly-Clark Worldwide, Inc. Absorbent articles enhancing skin barrier function
US6515029B1 (en) 1999-04-23 2003-02-04 Kimberly-Clark Worldwide, Inc. Absorbent article having a hydrophilic lotionized bodyside liner
US20030028140A1 (en) * 2001-03-12 2003-02-06 Greff Richard J. Cross-linked gelatin composition comprising a wetting agent
US6524269B2 (en) 2000-08-02 2003-02-25 Mcnamara Sean P. Lubricated tampon
US6540735B1 (en) 2000-05-12 2003-04-01 Sub-Q, Inc. System and method for facilitating hemostasis of blood vessel punctures with absorbable sponge
US6544236B1 (en) 1999-02-10 2003-04-08 Sub-Q, Incorporated Device, system and method for improving delivery of hemostatic material
US6570055B2 (en) 2000-12-21 2003-05-27 Mcneil-Ppc, Inc Apertured polymeric film web with surfactant mixture additive
US20030130636A1 (en) * 2001-12-22 2003-07-10 Brock Earl David System for improving skin health of absorbent article wearers
US6610026B2 (en) 1998-05-01 2003-08-26 Sub-Q, Inc. Method of hydrating a sponge material for delivery to a body
US20030206979A1 (en) * 2000-12-22 2003-11-06 Kimberly-Clark Worldwide, Inc. Absorbent articles with compositions for reducing irritation response
US20040019330A1 (en) * 2001-11-08 2004-01-29 Sub-Q, Inc., A California Corporation Sheath based blood vessel puncture locator and depth indicator
US20040102730A1 (en) * 2002-10-22 2004-05-27 Davis Thomas P. System and method for facilitating hemostasis of blood vessel punctures with absorbable sponge
US6743965B2 (en) 2000-12-21 2004-06-01 Mcneil-Ppc, Inc. Apertured polymeric film web with diol/surfactant additive
US6749860B2 (en) 2000-12-22 2004-06-15 Kimberly-Clark Worldwide, Inc. Absorbent articles with non-aqueous compositions containing botanicals
US6756520B1 (en) 2000-10-20 2004-06-29 Kimberly-Clark Worldwide, Inc. Hydrophilic compositions for use on absorbent articles to enhance skin barrier
US20040158287A1 (en) * 2000-07-14 2004-08-12 Cragg Andrew H. Sheath-mounted arterial plug delivery device
US20040176723A1 (en) * 2001-11-08 2004-09-09 Sing Eduardo Chi Pledget-handling system and method for delivering hemostasis promoting material to a blood vessel puncture site by fluid pressure
US20050033360A1 (en) * 2001-11-08 2005-02-10 Sing Eduardo Chi Pledget-handling system and method for delivering hemostasis promoting material to a blood vessel puncture site by fluid pressure
US6863680B2 (en) 2001-11-08 2005-03-08 Sub-Q, Inc. System and method for delivering hemostasis promoting material to a blood vessel puncture site by fluid pressure
US20050059080A1 (en) * 1998-05-01 2005-03-17 Sing Eduardo Chi Absorbable sponge with contrasting agent
US20050113737A1 (en) * 1998-05-01 2005-05-26 Mark Ashby Device and method for facilitating hemostasis of a biopsy tract
US6984219B2 (en) 1999-09-23 2006-01-10 Mark Ashby Depth and puncture control for blood vessel hemostasis system
US7008440B2 (en) 2001-11-08 2006-03-07 Sub-Q, Inc. System and method for delivering hemostasis promoting material to a blood vessel puncture site by fluid pressure
US7029489B1 (en) 2001-05-18 2006-04-18 Sub-Q, Inc. System and method for delivering hemostasis promoting material to a blood vessel puncture site
US7037322B1 (en) 2001-11-08 2006-05-02 Sub-Q, Inc. System and method for delivering hemostasis promoting material to a blood vessel puncture with a staging tube
US7048710B1 (en) 1998-05-01 2006-05-23 Sub-Q, Inc. System and method for facilitating hemostasis of blood vessel punctures with absorbable sponge
US7201725B1 (en) 2000-09-25 2007-04-10 Sub-Q, Inc. Device and method for determining a depth of an incision
US7335219B1 (en) 2002-11-04 2008-02-26 Sub-Q, Inc. Hemostatic device including a capsule
US7625352B1 (en) 1998-05-01 2009-12-01 Sub-Q, Inc. Depth and puncture control for system for hemostasis of blood vessel
US7695492B1 (en) 1999-09-23 2010-04-13 Boston Scientific Scimed, Inc. Enhanced bleed back system
US7875043B1 (en) 2003-12-09 2011-01-25 Sub-Q, Inc. Cinching loop
US7955353B1 (en) 2002-11-04 2011-06-07 Sub-Q, Inc. Dissolvable closure device
EP2412349A1 (en) * 2009-03-23 2012-02-01 Uni-Charm Corporation Tampon
US8317821B1 (en) 2002-11-04 2012-11-27 Boston Scientific Scimed, Inc. Release mechanism
US10022276B1 (en) 2017-10-12 2018-07-17 Lacey Janell Lund Self-lubricating tampon applicator

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US2808832A (en) * 1952-04-24 1957-10-08 Sanitary Products Corp Film-tipped catamenial tampons
US3428044A (en) * 1965-10-15 1969-02-18 Kimberly Clark Co Coated catamenial tampon
US3393678A (en) * 1966-01-03 1968-07-23 Purex Corp Ltd Tampons and the like
US3595236A (en) * 1969-03-17 1971-07-27 Kimberly Clark Co Coating to aid tampon insertion and tampons coated therewith

Cited By (82)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3805785A (en) * 1972-06-06 1974-04-23 P Marginet Feminine use pads
US3884233A (en) * 1973-09-04 1975-05-20 Betty Louise Summey Tampon and suppository combination
US3932322A (en) * 1975-03-07 1976-01-13 Kimberly-Clark Corporation Water absorbing starch-acrylonitrile graft copolymers fumed silica or alumina modified to improve rate of absorption for physiological fluids
US4373631A (en) * 1979-04-24 1983-02-15 Dr. Carl Hahn G.M.B.H. Tampon pack especially for a coated tampon containing medicaments
US4582717A (en) * 1982-02-06 1986-04-15 Bayer Aktiengesellschaft Process for production of vaginal tampons containing pharmaceutical active compound
GB2203949B (en) * 1987-05-02 1991-03-27 Smith & Nephew Ass Lubricated absorbent tampons.
GB2203949A (en) * 1987-05-02 1988-11-02 Smith & Nephew Ass Absorbent tampon
EP0685213A2 (en) 1994-05-31 1995-12-06 Kimberly-Clark Corporation Tampon with integral cover
EP0692263A2 (en) 1994-06-24 1996-01-17 McNEIL-PPC, INC. Method of reducing the coefficient of friction of absorbent products and wax coated products produced thereby
US20020156495A1 (en) * 1995-09-15 2002-10-24 Rodney Brenneman Apparatus and method for percutaneous sealing of blood vessel punctures
US7175646B2 (en) 1995-09-15 2007-02-13 Boston Scientific Scimed, Inc. Apparatus and method for percutaneous sealing of blood vessel punctures
US5744150A (en) * 1997-01-29 1998-04-28 Xomed Surgical Products, Inc. Softened antimicrobial sponge material with color change indication of antimicrobial activity
US5928665A (en) * 1997-01-29 1999-07-27 Xomed Surgical Products, Inc. Wound dressing including polyvinyl acetal sponge material
US20030135237A1 (en) * 1998-05-01 2003-07-17 Cragg Andrew H. Device, system and method for improving delivery of hemostatic material
US7611479B2 (en) 1998-05-01 2009-11-03 Sub-Q, Inc. System and method for facilitating hemostasis of blood vessel punctures with absorbable sponge
US20050113737A1 (en) * 1998-05-01 2005-05-26 Mark Ashby Device and method for facilitating hemostasis of a biopsy tract
US8050741B2 (en) 1998-05-01 2011-11-01 Boston Scientific Scimed, Inc. Device and method for facilitating hemostasis of a biopsy tract
US7753872B2 (en) 1998-05-01 2010-07-13 Boston Scientific Scimed, Inc. Device, system and method for improving delivery of hemostatic material
US7048710B1 (en) 1998-05-01 2006-05-23 Sub-Q, Inc. System and method for facilitating hemostasis of blood vessel punctures with absorbable sponge
US7618567B2 (en) 1998-05-01 2009-11-17 Boston Scientific Scimed, Inc. Absorbable sponge with contrasting agent
US7625352B1 (en) 1998-05-01 2009-12-01 Sub-Q, Inc. Depth and puncture control for system for hemostasis of blood vessel
US6610026B2 (en) 1998-05-01 2003-08-26 Sub-Q, Inc. Method of hydrating a sponge material for delivery to a body
US20050059080A1 (en) * 1998-05-01 2005-03-17 Sing Eduardo Chi Absorbable sponge with contrasting agent
US20100029908A1 (en) * 1998-05-01 2010-02-04 Boston Scientific Scimed, Inc. Absorbable sponge with contrasting agent
US20100036414A1 (en) * 1998-05-01 2010-02-11 Sub-Q, Inc. System and method for facilitating hemostasis of blood vessel punctures with absorbable sponge
US20030088271A1 (en) * 1998-05-01 2003-05-08 Cragg Andrew M. System and method for facilitating hemostasis of blood vessel punctures with absorbable sponge
US6096332A (en) * 1998-06-30 2000-08-01 Mcneil-Ppc, Inc. Adding pharmaceutically active compounds to substrates
US6316019B1 (en) 1998-06-30 2001-11-13 Mcneil-Ppc, Inc. Process for adding pharmaceutically active compounds to substrates
EP0988847A3 (en) * 1998-09-24 2001-05-30 Rauscher Consumer Products GmbH Tampon and tampon package
US6544236B1 (en) 1999-02-10 2003-04-08 Sub-Q, Incorporated Device, system and method for improving delivery of hemostatic material
WO2000051499A1 (en) * 1999-03-05 2000-09-08 Sub-Q, Inc. System and method for facilitating hemostasis of blood vessel punctures with absorbable sponge
US6515029B1 (en) 1999-04-23 2003-02-04 Kimberly-Clark Worldwide, Inc. Absorbent article having a hydrophilic lotionized bodyside liner
US7695492B1 (en) 1999-09-23 2010-04-13 Boston Scientific Scimed, Inc. Enhanced bleed back system
US6984219B2 (en) 1999-09-23 2006-01-10 Mark Ashby Depth and puncture control for blood vessel hemostasis system
US20020173760A1 (en) * 1999-12-29 2002-11-21 Jean-Bastien Pasquini Antiseptic tampon and method of preparing it
US6540735B1 (en) 2000-05-12 2003-04-01 Sub-Q, Inc. System and method for facilitating hemostasis of blood vessel punctures with absorbable sponge
US6964658B2 (en) 2000-05-12 2005-11-15 Sub-Q, Inc. System and method for facilitating hemostasis of blood vessel punctures with absorbable sponge
US7621936B2 (en) 2000-07-14 2009-11-24 Boston Scientific Scimed, Inc. Sheath-mounted arterial plug delivery device
US20100049245A1 (en) * 2000-07-14 2010-02-25 Boston Scientific Scimed, Inc. Sheath-mounted arterial plug delivery device
US20040158287A1 (en) * 2000-07-14 2004-08-12 Cragg Andrew H. Sheath-mounted arterial plug delivery device
US8696702B2 (en) 2000-07-14 2014-04-15 Boston Scientific Scimed, Inc. Sheath-mounted arterial plug delivery device
US6524269B2 (en) 2000-08-02 2003-02-25 Mcnamara Sean P. Lubricated tampon
US7201725B1 (en) 2000-09-25 2007-04-10 Sub-Q, Inc. Device and method for determining a depth of an incision
US6503526B1 (en) 2000-10-20 2003-01-07 Kimberly-Clark Worldwide, Inc. Absorbent articles enhancing skin barrier function
US6756520B1 (en) 2000-10-20 2004-06-29 Kimberly-Clark Worldwide, Inc. Hydrophilic compositions for use on absorbent articles to enhance skin barrier
US6570055B2 (en) 2000-12-21 2003-05-27 Mcneil-Ppc, Inc Apertured polymeric film web with surfactant mixture additive
US6743965B2 (en) 2000-12-21 2004-06-01 Mcneil-Ppc, Inc. Apertured polymeric film web with diol/surfactant additive
US7771735B2 (en) 2000-12-22 2010-08-10 Kimberly-Clark Worldwide, Inc. Absorbent articles with compositions for reducing irritation response
US6749860B2 (en) 2000-12-22 2004-06-15 Kimberly-Clark Worldwide, Inc. Absorbent articles with non-aqueous compositions containing botanicals
US6689932B2 (en) 2000-12-22 2004-02-10 Kimberly-Clark Worldwide, Inc. Absorbent articles with simplified compositions having good stability
US20020128615A1 (en) * 2000-12-22 2002-09-12 Tyrrell David John Absorbent articles with non-aqueous compositions containing anionic polymers
US20020120241A1 (en) * 2000-12-22 2002-08-29 Tyrrell David John Absorbent articles with hydrophilic compositions containing anionic polymers
US20030206979A1 (en) * 2000-12-22 2003-11-06 Kimberly-Clark Worldwide, Inc. Absorbent articles with compositions for reducing irritation response
US20020120242A1 (en) * 2000-12-22 2002-08-29 Tyrrell David John Absorbent articles with hydrophilic compositions containing botanicals
US8524270B2 (en) 2001-03-12 2013-09-03 Boston Scientific Scimed, Inc. Cross-linked gelatin composition coated with a wetting agent
US6849232B2 (en) 2001-03-12 2005-02-01 Sub-Q, Inc. Methods for sterilizing cross-linked gelatin compositions
US7264772B2 (en) 2001-03-12 2007-09-04 Boston Scientific Scimed, Inc. Methods for sterilizing cross-linked gelatin compositions
US20020190226A1 (en) * 2001-03-12 2002-12-19 Mark Ashby Methods for sterilizing cross-linked gelatin compositions
US20030028140A1 (en) * 2001-03-12 2003-02-06 Greff Richard J. Cross-linked gelatin composition comprising a wetting agent
US8821918B2 (en) 2001-03-12 2014-09-02 Boston Scientific Scimed Inc. Cross-linked gelatin composition comprising a wetting agent
US8187625B2 (en) 2001-03-12 2012-05-29 Boston Scientific Scimed, Inc. Cross-linked gelatin composition comprising a wetting agent
US7029489B1 (en) 2001-05-18 2006-04-18 Sub-Q, Inc. System and method for delivering hemostasis promoting material to a blood vessel puncture site
US20040019330A1 (en) * 2001-11-08 2004-01-29 Sub-Q, Inc., A California Corporation Sheath based blood vessel puncture locator and depth indicator
US7025748B2 (en) 2001-11-08 2006-04-11 Boston Scientific Scimed, Inc. Sheath based blood vessel puncture locator and depth indicator
US20050033360A1 (en) * 2001-11-08 2005-02-10 Sing Eduardo Chi Pledget-handling system and method for delivering hemostasis promoting material to a blood vessel puncture site by fluid pressure
US20040176723A1 (en) * 2001-11-08 2004-09-09 Sing Eduardo Chi Pledget-handling system and method for delivering hemostasis promoting material to a blood vessel puncture site by fluid pressure
US7192436B2 (en) 2001-11-08 2007-03-20 Sub-Q, Inc. Pledget-handling system and method for delivering hemostasis promoting material to a blood vessel puncture site by fluid pressure
US7037323B2 (en) 2001-11-08 2006-05-02 Sub-Q, Inc. Pledget-handling system and method for delivering hemostasis promoting material to a blood vessel puncture site by fluid pressure
US7008440B2 (en) 2001-11-08 2006-03-07 Sub-Q, Inc. System and method for delivering hemostasis promoting material to a blood vessel puncture site by fluid pressure
US6863680B2 (en) 2001-11-08 2005-03-08 Sub-Q, Inc. System and method for delivering hemostasis promoting material to a blood vessel puncture site by fluid pressure
US7037322B1 (en) 2001-11-08 2006-05-02 Sub-Q, Inc. System and method for delivering hemostasis promoting material to a blood vessel puncture with a staging tube
US20030130636A1 (en) * 2001-12-22 2003-07-10 Brock Earl David System for improving skin health of absorbent article wearers
US20040102730A1 (en) * 2002-10-22 2004-05-27 Davis Thomas P. System and method for facilitating hemostasis of blood vessel punctures with absorbable sponge
US7955353B1 (en) 2002-11-04 2011-06-07 Sub-Q, Inc. Dissolvable closure device
US8317821B1 (en) 2002-11-04 2012-11-27 Boston Scientific Scimed, Inc. Release mechanism
US7335219B1 (en) 2002-11-04 2008-02-26 Sub-Q, Inc. Hemostatic device including a capsule
US7455680B1 (en) 2002-11-04 2008-11-25 Boston Scientific Scimed, Inc. Apparatus and method for inhibiting blood loss
US7875043B1 (en) 2003-12-09 2011-01-25 Sub-Q, Inc. Cinching loop
EP2412349A1 (en) * 2009-03-23 2012-02-01 Uni-Charm Corporation Tampon
EP2412349A4 (en) * 2009-03-23 2012-12-26 Uni Charm Corp Tampon
US10022276B1 (en) 2017-10-12 2018-07-17 Lacey Janell Lund Self-lubricating tampon applicator
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