WO1996002158A1 - Use of silica gel as moisture absorbing material - Google Patents

Use of silica gel as moisture absorbing material Download PDF

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Publication number
WO1996002158A1
WO1996002158A1 PCT/NO1995/000128 NO9500128W WO9602158A1 WO 1996002158 A1 WO1996002158 A1 WO 1996002158A1 NO 9500128 W NO9500128 W NO 9500128W WO 9602158 A1 WO9602158 A1 WO 9602158A1
Authority
WO
WIPO (PCT)
Prior art keywords
silica gel
moisture
sole
absorbing material
footwear
Prior art date
Application number
PCT/NO1995/000128
Other languages
French (fr)
Inventor
Svein FRØYNA
Original Assignee
Froeyna Svein
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Froeyna Svein filed Critical Froeyna Svein
Priority to AU30879/95A priority Critical patent/AU3087995A/en
Priority to EP95926543A priority patent/EP0771157A1/en
Publication of WO1996002158A1 publication Critical patent/WO1996002158A1/en

Links

Classifications

    • A—HUMAN NECESSITIES
    • A43—FOOTWEAR
    • A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
    • A43B17/00—Insoles for insertion, e.g. footbeds or inlays, for attachment to the shoe after the upper has been joined
    • A43B17/10—Insoles for insertion, e.g. footbeds or inlays, for attachment to the shoe after the upper has been joined specially adapted for sweaty feet; waterproof
    • A43B17/102—Moisture absorbing socks; Moisture dissipating socks
    • A—HUMAN NECESSITIES
    • A41—WEARING APPAREL
    • A41D—OUTERWEAR; PROTECTIVE GARMENTS; ACCESSORIES
    • A41D27/00—Details of garments or of their making
    • A41D27/02—Linings
    • A—HUMAN NECESSITIES
    • A41—WEARING APPAREL
    • A41D—OUTERWEAR; PROTECTIVE GARMENTS; ACCESSORIES
    • A41D31/00—Materials specially adapted for outerwear
    • A41D31/04—Materials specially adapted for outerwear characterised by special function or use
    • A41D31/12—Hygroscopic; Water retaining
    • A41D31/125—Moisture handling or wicking function through layered materials

Definitions

  • the invention relates to the use of silicon dixiode/silica as a moisture-absorbent material in clothing and o equipment which is used on or near the body.
  • the invention relates to the use of a particu silica gel in soles, socks or linings in different type footwear. That people's feet become damp to a varying det_ depending upon the shoe or boot type, the temperature degree of activity, is a well-known problem.
  • the invention also relates to the use of silica gel as a moisture-absorbent material in jacket linings, car seat covers and for use in the transport and storage of hot food.
  • Silica gel/silicon dioxide (Si0 2 ) is found in large quantities in nature in the form of sand, quartz and similar. Silica gel is insoluble in water and is usually found in the form of a white powder. Silica is used in many products such as, e.g., glass, cement, cosmetics, abrasives, catalysts and microcircuits. Silica gel also has a large area of application as a moisture-absorbent material, especially in industry and research where it is a requirement that work is carried out under conditions free from water. Silica gel is the amorphous, non-crystalline form of silicon dioxide (Si ,) .
  • NO 882095 relates to a shoe membrane material having absorbent properties onto which activated carbon particles are dotted.
  • the material is especially intended to be used in military combat boots or protective boots to adsorb aggressive chemicals.
  • NO 854987 relates to a sole which contains an absorbent layer of moisture storing fibres having capillary-active pores.
  • NO 890875 describes an inner sole having channels, and the function of the sole is to produce a yielding and shock- absorbing effect during use.
  • the present invention thus relates to a use of silica gel in an insole for footwear.
  • a sole containing silica gel will have the property that the moisture arising from the user's sweat in boots and shoes, in particular those which have impervious over-material of rubber and synthetic substances such as PVC, or leather material covered with a coating of such a substance, will be absorbed in the silica gel thus preventing the user's feet from becoming damp.
  • Silica gel also has the advantage that it is able regenerate on drying. This can be done in that the sole is dried with a boot dryer or in a tumble dryer, oven or on a drying stand over a stove. Alternatively, the drying can take place at room temperature.
  • the sole according to the invention may consist of three layers.
  • the undersole must have a rigidity that prevents the sole from "curling" on use. It must be diffusion-proof so that it does not absorb moisture from below, and the material must withstand heat as high as 50°C during drying.
  • a highly suitable material is pressed cork which is available in very thin sheets, measuring as little as 0.7 mm in thickness. This is essential to prevent the sole from building up too much inside the boot or shoe.
  • Other materials are also conceivable, natural or synthetic, just as long as they have the aforementioned properties.
  • the middle sole consists of silica gel in particulate form which is from 1.2 mm and smaller.
  • a silica gel is used where as much as 90% is smaller than 1.2 mm. This powder is spread evenly over the entire surface of the sole.
  • the amount of silica gel varies according to the size of the sole, and whether it is for boots or shoes, and may be from 1 mm to 5 mm.
  • the uppermost layer of the sole consists of textile wherein the density of the weave is such that it does not allow the silica gel particles to penetrate.
  • the textile material in the top layer must have a wear resistance which withstands longterm use.
  • the sole will be sewn through in, e.g., a "waffle pattern” or a chequered pattern of approx. 0.8 sq. cm. Longitudinal, transverse, zig-zag or other patterns may also be used.
  • the chief function of the pattern is to keep and distribute the silica gel material evenly over the sole, and the optimal pattern will be chosen on the basis of this criterion.
  • Silica gel may also be used in a sock for use in footwear.
  • the sock may consist of a conventional textile material, but can, e.g., under the foot at the front and back be provided with areas having a silica gel layer.
  • Silica gel may also be used as a permanent lining in footwear, e.g., boots.
  • Silica gel which is used as a lining in jackets may, e.g., be in the form of a vest which can be taken out of and fastened into the jacket with the aid of fastening means.
  • This lining may be used under jackets for use during physically demanding work or, e.g., in moutaineering jackets.
  • Silica gel may also be used as a moisture-absorbent seat cover in, e.g. , cars.
  • silica gel can be sewn into a cushion, one side of which consists of a material which is impervious to moisture, whereas the other side which is exposed to the hot food can absorb moisture.
  • Paper and aluminium bags which today are used for storing grilled food can be lined on the inside with a silica gel layer. This will absorb any moisture which is given off and in this way the food, e.g., a chicken, will keep its crisp skin or crust.

Abstract

The use of silica gel as a moisture-absorbent material in clothing and other equipment used on or near the body.

Description

USE OF SILICAGEL AS MOISTURE ABSORBING MATERIAL
The invention relates to the use of silicon dixiode/silica as a moisture-absorbent material in clothing and o equipment which is used on or near the body. To be precise, the invention relates to the use of a particu silica gel in soles, socks or linings in different type footwear. That people's feet become damp to a varying det_ depending upon the shoe or boot type, the temperature degree of activity, is a well-known problem.
The invention also relates to the use of silica gel as a moisture-absorbent material in jacket linings, car seat covers and for use in the transport and storage of hot food.
Silica gel/silicon dioxide (Si02) is found in large quantities in nature in the form of sand, quartz and similar. Silica gel is insoluble in water and is usually found in the form of a white powder. Silica is used in many products such as, e.g., glass, cement, cosmetics, abrasives, catalysts and microcircuits. Silica gel also has a large area of application as a moisture-absorbent material, especially in industry and research where it is a requirement that work is carried out under conditions free from water. Silica gel is the amorphous, non-crystalline form of silicon dioxide (Si ,) .
Tests and calculations have shown that under extreme physical conditions, an adult human being can exude as much as 20 ml of moisture per foot per hour.
Today, several types of shoe soles are known which claim to be moisture and odour-absorbent. However, in practice this proves not to be the case. There are, for instance, soles made of various foam rubber materials, but these have a limited absorbent capacity.
NO 882095 relates to a shoe membrane material having absorbent properties onto which activated carbon particles are dotted. The material is especially intended to be used in military combat boots or protective boots to adsorb aggressive chemicals.
NO 854987 relates to a sole which contains an absorbent layer of moisture storing fibres having capillary-active pores.
NO 890875 describes an inner sole having channels, and the function of the sole is to produce a yielding and shock- absorbing effect during use.
The present invention thus relates to a use of silica gel in an insole for footwear. A sole containing silica gel will have the property that the moisture arising from the user's sweat in boots and shoes, in particular those which have impervious over-material of rubber and synthetic substances such as PVC, or leather material covered with a coating of such a substance, will be absorbed in the silica gel thus preventing the user's feet from becoming damp. To date, there are no soles which have an effect similar to that of a silica gel sole, insofar as absorption of moisture and odour is concerned.
Silica gel also has the advantage that it is able regenerate on drying. This can be done in that the sole is dried with a boot dryer or in a tumble dryer, oven or on a drying stand over a stove. Alternatively, the drying can take place at room temperature.
The sole according to the invention may consist of three layers. The undersole must have a rigidity that prevents the sole from "curling" on use. It must be diffusion-proof so that it does not absorb moisture from below, and the material must withstand heat as high as 50°C during drying. A highly suitable material is pressed cork which is available in very thin sheets, measuring as little as 0.7 mm in thickness. This is essential to prevent the sole from building up too much inside the boot or shoe. Other materials are also conceivable, natural or synthetic, just as long as they have the aforementioned properties.
The middle sole consists of silica gel in particulate form which is from 1.2 mm and smaller. A silica gel is used where as much as 90% is smaller than 1.2 mm. This powder is spread evenly over the entire surface of the sole. The amount of silica gel varies according to the size of the sole, and whether it is for boots or shoes, and may be from 1 mm to 5 mm.
The uppermost layer of the sole consists of textile wherein the density of the weave is such that it does not allow the silica gel particles to penetrate. The textile material in the top layer must have a wear resistance which withstands longterm use.
In order to keep the particles evenly spread on the sole surface between the bottom layer and the top layer, the sole will be sewn through in, e.g., a "waffle pattern" or a chequered pattern of approx. 0.8 sq. cm. Longitudinal, transverse, zig-zag or other patterns may also be used.
The chief function of the pattern is to keep and distribute the silica gel material evenly over the sole, and the optimal pattern will be chosen on the basis of this criterion.
By using a silica gel material which changes colour as the gel passes from a dry to a moist condition, and by using a "window" in the sole, it is possible to see, e.g., when the sole has been completely dried.
Silica gel may also be used in a sock for use in footwear. The sock may consist of a conventional textile material, but can, e.g., under the foot at the front and back be provided with areas having a silica gel layer. Silica gel may also be used as a permanent lining in footwear, e.g., boots.
Silica gel which is used as a lining in jackets may, e.g., be in the form of a vest which can be taken out of and fastened into the jacket with the aid of fastening means. This lining may be used under jackets for use during physically demanding work or, e.g., in moutaineering jackets.
Silica gel may also be used as a moisture-absorbent seat cover in, e.g. , cars.
Within the ever-growing fast food and/or ready-made food trade where food is transported hot, there has long been a need for a material which absorbs moisture that evaporates from the hot food. If this moisture is not removed, the consistency of the food will be spoiled. By using a cushion or layer of silica gel, this moisture problem will be almost entirely solved. The silica gel can be sewn into a cushion, one side of which consists of a material which is impervious to moisture, whereas the other side which is exposed to the hot food can absorb moisture.
Paper and aluminium bags which today are used for storing grilled food can be lined on the inside with a silica gel layer. This will absorb any moisture which is given off and in this way the food, e.g., a chicken, will keep its crisp skin or crust.

Claims

P a t e n t c l a i m s
1. The use of silica gel as a moisture-absorbent material in clothing and other equipment used on or near the body.
2.
The use of silica gel as defined in Claim 1 in soles for footwear.
3.
The use of silica gel as defined in Claim 1 in socks for use in footwear.
4.
The use of silica gel as defined in Claim 1 as a lining in jackets.
5.
The use of silica gel as defined in Claim 1 as a permanent lining in footwear.
6. The use of silica gel as defined in Claim 1 in seat covers in motor vehicles, e.g., cars.
7.
The use of silica gel as a moisture-absorbent material for storing and transporting hot, ready-made food.
PCT/NO1995/000128 1994-07-15 1995-07-14 Use of silica gel as moisture absorbing material WO1996002158A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
AU30879/95A AU3087995A (en) 1994-07-15 1995-07-14 Use of silica gel as moisture absorbing material
EP95926543A EP0771157A1 (en) 1994-07-15 1995-07-14 Use of silica gel as moisture absorbing material

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NO942678A NO942678L (en) 1994-07-15 1994-07-15 Use of silica gel as a moisture absorbing material
NO942678 1994-07-15

Publications (1)

Publication Number Publication Date
WO1996002158A1 true WO1996002158A1 (en) 1996-02-01

Family

ID=19897269

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/NO1995/000128 WO1996002158A1 (en) 1994-07-15 1995-07-14 Use of silica gel as moisture absorbing material

Country Status (4)

Country Link
EP (1) EP0771157A1 (en)
AU (1) AU3087995A (en)
NO (1) NO942678L (en)
WO (1) WO1996002158A1 (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000070986A1 (en) * 1999-05-24 2000-11-30 Internet World Sport (Isle Of Man) Limited An article of footwear
US6478864B1 (en) 1999-09-28 2002-11-12 Cabot Corporation Surface coating composition
US6720368B2 (en) 2001-03-15 2004-04-13 Cabot Corporation Matt, thixotropic paint formulation
WO2006000044A1 (en) * 2004-06-24 2006-01-05 Ezio Margiotta Liquid impermeable material
US7462654B2 (en) 2001-03-15 2008-12-09 Cabot Corporation Corrosion-resistant coating composition
WO2010003789A1 (en) * 2008-07-09 2010-01-14 Evonik Degussa Gmbh Sweat-absorbing shoe sole inserts having improved sweat absorption

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4062131A (en) * 1976-09-10 1977-12-13 Scholl, Inc. Insoles for footwear
DE3135025A1 (en) * 1981-09-04 1983-03-24 Collo Gmbh, 5303 Bornheim METHOD FOR PRODUCING A SORPTIVELY ACTIVE BODY, IN PARTICULAR TO REMOVE ODORS, FOR ROOM EQUIPMENT AND THE LIKE.
EP0446600A1 (en) * 1990-02-08 1991-09-18 ABOCA S.r.l. Product for sanitizing, adsorbing moisture and/or perfuming footwear, and related method for use

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4062131A (en) * 1976-09-10 1977-12-13 Scholl, Inc. Insoles for footwear
DE3135025A1 (en) * 1981-09-04 1983-03-24 Collo Gmbh, 5303 Bornheim METHOD FOR PRODUCING A SORPTIVELY ACTIVE BODY, IN PARTICULAR TO REMOVE ODORS, FOR ROOM EQUIPMENT AND THE LIKE.
US4517308A (en) * 1981-09-04 1985-05-14 Collo Gmbh Method of producing a sorptive body, particularly for eliminating odors, air freshening, etc. and the resultant product
EP0446600A1 (en) * 1990-02-08 1991-09-18 ABOCA S.r.l. Product for sanitizing, adsorbing moisture and/or perfuming footwear, and related method for use

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000070986A1 (en) * 1999-05-24 2000-11-30 Internet World Sport (Isle Of Man) Limited An article of footwear
US6478864B1 (en) 1999-09-28 2002-11-12 Cabot Corporation Surface coating composition
US6720368B2 (en) 2001-03-15 2004-04-13 Cabot Corporation Matt, thixotropic paint formulation
US7462654B2 (en) 2001-03-15 2008-12-09 Cabot Corporation Corrosion-resistant coating composition
WO2006000044A1 (en) * 2004-06-24 2006-01-05 Ezio Margiotta Liquid impermeable material
WO2010003789A1 (en) * 2008-07-09 2010-01-14 Evonik Degussa Gmbh Sweat-absorbing shoe sole inserts having improved sweat absorption
US20110078920A1 (en) * 2008-07-09 2011-04-07 Evonik Degussa Gmbh Sweat-absorbing shoe sole inserts having improved sweat absorption

Also Published As

Publication number Publication date
EP0771157A1 (en) 1997-05-07
AU3087995A (en) 1996-02-16
NO942678D0 (en) 1994-07-15
NO942678L (en) 1996-01-16

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