WO2003095534A1 - Cold seal release film with improved scuff resistance - Google Patents
Cold seal release film with improved scuff resistance Download PDFInfo
- Publication number
- WO2003095534A1 WO2003095534A1 PCT/US2003/008065 US0308065W WO03095534A1 WO 2003095534 A1 WO2003095534 A1 WO 2003095534A1 US 0308065 W US0308065 W US 0308065W WO 03095534 A1 WO03095534 A1 WO 03095534A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- butene
- cold seal
- poly
- film
- weight
- Prior art date
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/18—Layered products comprising a layer of synthetic resin characterised by the use of special additives
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/28—Layered products comprising a layer of synthetic resin comprising synthetic resins not wholly covered by any one of the sub-groups B32B27/30 - B32B27/42
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
- C08J5/18—Manufacture of films or sheets
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/18—Homopolymers or copolymers of hydrocarbons having four or more carbon atoms
- C08L23/20—Homopolymers or copolymers of hydrocarbons having four or more carbon atoms having four to nine carbon atoms
- C08L23/22—Copolymers of isobutene; Butyl rubber ; Homo- or copolymers of other iso-olefins
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J7/00—Adhesives in the form of films or foils
- C09J7/40—Adhesives in the form of films or foils characterised by release liners
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/70—Other properties
- B32B2307/748—Releasability
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2553/00—Packaging equipment or accessories not otherwise provided for
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2323/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
- C08J2323/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
- C08J2323/18—Homopolymers or copolymers of hydrocarbons having four or more carbon atoms
- C08J2323/20—Homopolymers or copolymers of hydrocarbons having four or more carbon atoms having four to nine carbon atoms
- C08J2323/22—Copolymers of isobutene; butyl rubber
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/10—Homopolymers or copolymers of propene
- C08L23/14—Copolymers of propene
- C08L23/142—Copolymers of propene at least partially crystalline copolymers of propene with other olefins
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2423/00—Presence of polyolefin
- C09J2423/005—Presence of polyolefin in the release coating
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2423/00—Presence of polyolefin
- C09J2423/006—Presence of polyolefin in the substrate
-
- Y—GENERAL 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
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/28—Web or sheet containing structurally defined element or component and having an adhesive outermost layer
-
- Y—GENERAL 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
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/28—Web or sheet containing structurally defined element or component and having an adhesive outermost layer
- Y10T428/2848—Three or more layers
-
- Y—GENERAL 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
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/31504—Composite [nonstructural laminate]
- Y10T428/31855—Of addition polymer from unsaturated monomers
-
- Y—GENERAL 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
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/31504—Composite [nonstructural laminate]
- Y10T428/31855—Of addition polymer from unsaturated monomers
- Y10T428/31909—Next to second addition polymer from unsaturated monomers
-
- Y—GENERAL 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
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/31504—Composite [nonstructural laminate]
- Y10T428/31855—Of addition polymer from unsaturated monomers
- Y10T428/31909—Next to second addition polymer from unsaturated monomers
- Y10T428/31913—Monoolefin polymer
-
- Y—GENERAL 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
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/31504—Composite [nonstructural laminate]
- Y10T428/31855—Of addition polymer from unsaturated monomers
- Y10T428/31938—Polymer of monoethylenically unsaturated hydrocarbon
Definitions
- This invention relates generally to cold seal release films, and more particularly to cold seal release films having improved scuff resistance.
- Cold seal release films are most commonly used as the outside web or film of a multi-web packaging structure.
- the release film is a clear web that is reverse printed and adhesive laminated to an inner web such as an opaque
- the cold seal release film serves the following functions: 1) it provides a transparent web which can be reverse printed so that the decoration is "buried" beneath the clear web to prevent the ink from being worn away; 2) it
- L5 provides the desired slip properties so that the laminate will run effectively on packaging machines and 3) it provides a surface with low adhesion to the cold seal adhesive so that the laminate roll can be unwound during a packaging operation, with the adhesive remaining on the desired surfece of the lamination.
- a polypropylene homopolymer as the cold seal release surface.
- This prior art film provides good printing characteristics, low coefficient of friction (COF) and a reasonably low adhesive release force from the most common cold seal adhesives; namely, acrylic/rubber latex adhesives.
- prior art cold release films employing a polypropylene homopolymer also have reasonably good scuff 5 resistence.
- the prior art films employing polypropylene homopolymer have a major deficiency; namely, they do not provide the desired low adhesive release force from synthetic adhesives, e.g., ethylene vinyl acetate based adhesives.
- polystyrenes poly-1 -butene homopolymer
- poly-1 - butene/ethylene copolymers collectively referred to as polybutenes
- scuff resistence As noted above, an important characteristic for cold seal release films is good scuff resistence. This is an important property because the film serves as the outside web or layer in a monolayer or multilayer cold seal packaging application. Therefore, scuffing, which can occur either during the printing/laminating process or the packaging process, causes the finished product to have a dull or shop-worn appearance, which is undesirable.
- U.S. Patent No. 4,554,321 to Hwo et al. discloses heat sealable films having improved seal impact strength comprising a stereoregular, elastomeric polymer of butene-1 or blends thereof with conventional butene-1 -ethylene copolymers, optionally with small amounts of polypropylene and/or crystallization nucleating agents.
- the use of such stereoregular, elastomeric polymers is not desirable for use in cold seal release films of this invention.
- U.S. Patent No. 5,998,039 to Tanizaki, et al. discloses a polypropylene composite film comprising (1) a crystalline polypropylene layer and (2) a layer formed from a blend of a polypropylene homopolymer (5 - 95%) and a propylene 1 -butene random copolymer (95 - 5%), wherein the propylene component is greater than 50%, by weight, of the copolymer composition.
- WO 00/32395 A1 to Chang et al. discloses a polypropylene film containing a non-migratory slip and release additive package of a synthetic or mineral wax, an aluminosilicate additive, and optionally silicone oil and a cross-linked silicone polymer resin to improve cold seal adhesive release properties.
- this patent discloses adding nucleating agents to a polypropylene film for improving the strength of the film, there is no disclosure or suggestion that nucleating agents should or could be added to a polymer composition including a poly-1 butene homopolymer or copolymer composition. Nucleating agents are known to increase the stiffness of processed materials. Nucleating agents also are known to improve the optical and barrier properties of the resulting materials. Sodium benzoate is a desirable nucleating agent because, for among other reasons, it is readily available and economically practical to use.
- U.S. Patent 5,837,177 to DiNardo et al. discloses a method of making a polypropylene product for use in making biaxially oriented films.
- the method includes the addition of an improved nucleating system that allows for even distribution of a nucleating agent in a polypropylene material.
- the improved nucleating system comprises a nucleating agent such as sodium benzoate and a liquid miscible with the nucleating agent. The solution is combined with the polypropylene material, and the miscible liquid is removed during processing.
- a cold seal release film constituting either a monolayer film or an outer layer of a multilayer film includes a nucleating agent, such as sodium benzoate, provided in a polymer composition comprising 10% - 100% by weight of the polymer composition of a polymer selected from the group consisting of poly-1 - butene homopolymers, ethylene random copolymers of poly-1 -butene including 5 over 50% by weight poly-1 -butene and blends of the poly-1 -butene homopolymers and the ethylene random copolymers of poly-1 -butene, and 90% - 0% by weight of the polymer composition of a polymer selected from the group consisting of ethylene random copolymers of polypropylene, butene random copolymers of polypropylene and ethylene-butene random terpolymers of o polypropylene.
- a nucleating agent such as sodium benzoate
- a cold seal release film in accordance with this invention includes a nucleating agent, preferably sodium benzoate, added to a polymer composition comprising 10% - 100% by weight of the polymer composition of a polymer selected from the group consisting of poly-1 -butene homopolymers, poly-1 - butene/ethylene random copolymers having over 50% by weight poly-1 -butene and blends of the poly-1 -butene homopolymers and ethylene random copolymers of poly-1 -butene, and 90% - 0% by weight of the polymer composition of a polymer selected from the group consisting of ethylene random copolymers of polypropylene, butene random copolymers of polypropylene and ethylene-butene random terpolymers of polypropylene.
- a nucleating agent preferably sodium benzoate
- these films have been determined to have excellent cold seal release from a variety of adhesives, including acrylic/rubber latex adhesives and synthetic adhesives, as well as excellent scuff resistant properties. Most preferably, the cold seal release from the synthetic adhesives is less than 50 grams/inch.
- the poly-1 -butene/ethylene random copolymers include over 50% by weight of the 1 -butene monomer. Most preferably the poly-1 -butene/ethylene random copolymer includes less than 10% by weight of ethylene and more preferably between 0.1% and 6% by weight of ethylene.
- Representative poly-1 -butene/ethylene random copolymers usable in this invention are Basell DP8220 and Basell PB8340, which are medium ethylene content and low ethylene content poly-1 -butene random copolymers, respectively.
- Basell DP8220 includes approximately 2.5% by weight ethylene
- Basell PB 8340 includes approximately 0.2% by weight ethylene.
- poly-1 -butene homopolymer will perform in this invention the same as the poly-1 -butene random copolymer including 0.2% by weight ethylene.
- Both of the above-identified poly-1 - butene/ethylene random copolymers are manufactured by Basell Polyolefins of Wilmington DE 19808.
- the poly-1 -butene homopolymers and poly-1 - butene/ethylene random copolymers can be employed alone, can be blended together, or each can be employed in combination with other copolymers and terpolymers, including ethylene/propylene random copolymers, propylene/butene random copolymers and propylene/ethylene/butene random terpolymers.
- the preferred ethylene/propylene random copolymers are predominately propylene monomers, by weight, including up to about 10% by weight ethylene. More preferably the propylene/ethylene random copolymers include less than 6% ethylene, by weight.
- a representative propylene/ethylene random copolymer usable in this invention is Fina 8573, which includes approximately 5% by weight ethylene monomer in it. Fina 8573 is manufactured by ATO FINA Petrochemicals, LaPorte TX, 77571.
- another copolymer that can be employed in combination with either poly-1 -butene homopolymer or a poly-1 -butene/ethylene copolymer is a propylene/butene random copolymer, wherein the propylene is the major component, by weight, of the copolymer.
- the propylene/butene random copolymer includes less than 35% by weight butene and more preferably 5 3% to 20% by weight butene.
- a representative propylene/butene random copolymer usable in this invention is Union Carbide DS4DO5, manufactured by DOW Plastics in Houston TX 77042. This propylene/butene random copolymer includes approximately 14% by weight butene in it.
- a representative propylene/ethylene/butene random terpolymer usable in o this invention is Sumitomo SP88.
- This terpolymer includes approximately 85% by weight polypropylene, based on the weight of the polymer composition of the terpolymer, approximately 12% by weight ethylene based on the weight of the polymer composition of the terpolymer and approximately 3% by weight butene based on the weight of the polymer composition of the terpolymer.
- This 5 terpolymer is manufactured by Phillips Sumika, Houston TX 77058
- the preferred nucleating agent employed in this invention is sodium benzoate; preferably in the range of 0.02 - 0.1% of the overall polymer blend. It is considered to be within the scope of this invention to employ other nucleating agents. Individuals skilled in the art can test various nucleating agents to 0 determine whether they provide enhanced scuff resistance without adversely affecting the cold seal release properties from the adhesive. In the context of this invention a nucleating agent is one that has the ability to raise the crystallization temperature of a polyolefin as measured by Differential
- the cold seal release film can be a monolayer web or film, or an outer layer of a multilayer, coextruded film.
- the monolayer or multilayer, coextruded release films are adhered to yet another film, which also can be a monolayer or multilayer 0 film having additional desired properties for specific packaging applications and also receiving a cold seal adhesive on the outer exposed surface thereof.
- the other film can be a single layer or multilayer white opaque film or a metallized film layer.
- the surface of the monolayer or multilayer, coextruded release film opposite the release surface which is the 5 surface to be laminated to the other film, is treated, preferably oxidatively treated by corona or flame treatment, to make it receptive to laminating adhesives and, optionally, to printing inks.
- this latter surface optionally can be reverse printed so as to be viewable from the outer side of the release layer and also is capable of receiving a laminating adhesive thereon to bond the monolayer or o multilayer release film to the other film, as described above.
- the monolayer or multilayer, coextruded release film may be used by itself, without being laminated to any other films.
- the surface of the film opposite the surface that is intended to function as the cold seal release surface preferably is treated, preferably oxidatively 5 treated by corona or flame treatment, to make this opposite surface receptive to cold seal adhesives and, optionally, to printing inks.
- the cold seal release film is an outer layer of a composite, multilayer, coextruded film including a central core, an outer release layer including a nucleating agent o combined with the earlier-described polymer compositions and a skin layer on the side opposite the release layer.
- the outer surface of this latter outer skin layer is treated, preferably oxidatively treated by corona or flame treatment, to make the surface receptive to printing inks and/or laminating adhesives and/or cold seal adhesives, depending upon whether this outer surface is intended to be reverse printed, laminated to an additional film that will include the cold seal adhesive on the outer exposed surface thereof, or intended to directly receive the cold seal adhesive.
- the skin layer opposite the release layer in the multilayer, coextruded release film is a propylene/ethylene copolymer including less than 10% ethylene, by weight, and more preferably less than 7% ethylene by weight.
- a preferred propylene/ethylene copolymer employed as the skin layer is Fina 8573, which, as noted earlier in this application, includes approximately 5% by weight ethylene monomer in it.
- the core layer is a polyolefin material, or a blend of polyolefin materials, and most preferably is a polypropylene homopolymer.
- a representative polypropylene homopolymer employed as the core layer is Fina 3371.
- a preferred multilayer construction of this invention is a three-layer structure including a release film or layer having a thickness in the range of 0.25 to 20 microns; preferably 1 micron, a 20-micron-thick core layer and 1 -micron- thick skin layer. 0 It should be understood that the films of this invention may include a variety of additives that are well known to those skilled in the art.
- antistatic additives e.g., slip additives (e.g., high molecular weight fatty acid amides), organic or inorganic antiblocking additives (e.g., organic polymers such as polyamides, polyesters, polycarbonates and inorganic materials such as silicon 5 dioxide and silicates) and antioxidants may be added to one or more layers of the films of this invention, if desired.
- slip additives e.g., high molecular weight fatty acid amides
- organic or inorganic antiblocking additives e.g., organic polymers such as polyamides, polyesters, polycarbonates and inorganic materials such as silicon 5 dioxide and silicates
- antioxidants may be added to one or more layers of the films of this invention, if desired.
- Table 1 infra, more specifically describes the construction and composition of seven sample multilayer, coextruded constructions; samples 2, 5 and 6 being within the scope of the present invention. The remaining samples o were prepared for comparison purposes.
- Table 2 infra, shows the cold seal release properties and the scuff resistence properties of the seven samples identified in Table 1. It should be noted that in order to achieve the maximum benefits of this invention, care should be taken to introduce the nucleating agent uniformly throughout the composition. This can best be achieved by grinding the sodium benzoate or other nucleating agent to a very fine particle size, on the order of less than 10 microns. Most preferably the nucleating agent employed in this invention is sodium benzoate having 99.5%, by weight, of a particle size of 10 microns or less.
- Film Testing Procedure to determine the cold seal adhesive release force A coating of the specified adhesive was applied via a Mayer rod onto the designated film substrate to provide an adhesive strength greater than 300g/in. The coating was dried and then the release film was placed against the adhesive. Next, the two films were placed into a blocking jig where a contact force of 100psi was applied. The samples were held in the jig for 16 hours at 22° C. The force to separate the release film from the adhesive was then measured. Film Testing Procedure to Determine Scuff Resistance Two sheets of film with the release surfaces facing each other were mounted on the base and sled of a Sutherland rub tester. The two surfaces were then rubbed for the number of cycles specified in Table 2. The percent of transmission haze was measured before and after the Sutherland rub test, and the difference is the measure of scuff resistance, i.e., the lower the difference the better the scuff resistance. The invention is illustrated in more detail with reference to the following
- Samples 1 through 3 were produced via a laboratory co-extrusion die and then drawn 7x by 7x at a temperature of 140° C. to effect biaxial orientation. After orientation, the films were heat set 10%. Simultaneously biaxial orientation was carried out on a T.M. Long stretcher (T.M. Long Corporation, Somerville, N.J.).
- Samples 4 through 7 were produced by a co-extrusion process on a pilot tenter machine, with the cross-direction orientation step taking place after machine direction orientation, and with the machine direction/cross-machine direction draw ratios being 5x by 10x
- samples 1 - 3 were prepared on the laboratory extruder and T.M. Long stretcher.
- Samples 1 and 2 were evaluated with one acrylic/rubber latex (ATOfindley 1380) and three synthetic adhesives (ATOfindley 7114, Technical Coatings 339D and Technical Coatings 357D).
- the comparative sample 3 was evaluated only with the acrylic/rubber latex.
- the ATO findley adhesives are manufactured by ATO Findley, Wauwatosa Wl 53226.
- the ATOfindley 1380 adhesive is an acrylic/rubber latex adhesive.
- the ATOfindley 7114 adhesive is a synthetic adhesive.
- the Technical Coatings adhesives are manufactured by Rohm & Haas, Woodstock IL 60098. Both the Technical Coatings 339D adhesive and the
- test results of sample 2 versus sample 1 demonstrate that the poly-1 - butene/ethylene copolymer surface has release properties superior to homopolymer polypropylene for synthetic adhesives, but has an inferior scuff resistance.
- a comparison of sample 2 to comparative sample 3 demonstrates that the scuff resistance of the nucleated polymer (sample 2) is substantially superior to the non-nucleated polymer (comparative sample 3).
- Samples 4 through 7 were prepared in a separate set of experiments on a pilot tenter machine, as described earlier herein.
- a polypropylene control designated sample 4 was compared to nucleated blends of poly-1 - butene/ethylene copolymers with an ethylene random polypropylene copolymer designated sample 5, and with a butene random polypropylene copolymer designated sample 6.
- Comparative sample 7 is the same polymer blend as sample 5 but with no sodium benzoate nucleator added. Note that due to differences in the manner of producing samples 1 and 4 the absolute values of the adhesive release force are different. However, they still are of the same order of magnitude; demonstrating poor release from synthetic adhesives.
- sample 4 A comparison of sample 4 with samples 5 and 6 again demonstrates that blends containing poly-1 -butene/ethylene copolymers yield superior cold seal release force for synthetic adhesives.
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP20030714188 EP1504053A1 (en) | 2002-05-08 | 2003-03-19 | Cold seal release film with improved scuff resistance |
MXPA04011079A MXPA04011079A (en) | 2002-05-08 | 2003-03-19 | Cold seal release film with improved scuff resistance. |
AU2003218196A AU2003218196A1 (en) | 2002-05-08 | 2003-03-19 | Cold seal release film with improved scuff resistance |
CA 2483767 CA2483767C (en) | 2002-05-08 | 2003-03-19 | Cold seal release film with improved scuff resistance |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/141,258 US20030211349A1 (en) | 2002-05-08 | 2002-05-08 | Cold seal release film with improved scuff resistance |
US10/141,258 | 2002-05-08 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2003095534A1 true WO2003095534A1 (en) | 2003-11-20 |
Family
ID=29399614
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US2003/008065 WO2003095534A1 (en) | 2002-05-08 | 2003-03-19 | Cold seal release film with improved scuff resistance |
Country Status (6)
Country | Link |
---|---|
US (3) | US20030211349A1 (en) |
EP (1) | EP1504053A1 (en) |
AU (1) | AU2003218196A1 (en) |
CA (1) | CA2483767C (en) |
MX (1) | MXPA04011079A (en) |
WO (1) | WO2003095534A1 (en) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101724110B (en) | 2002-10-15 | 2013-03-27 | 埃克森美孚化学专利公司 | Multiple catalyst system for olefin polymerization and polymers produced therefrom |
US7700707B2 (en) | 2002-10-15 | 2010-04-20 | Exxonmobil Chemical Patents Inc. | Polyolefin adhesive compositions and articles made therefrom |
US20070014993A1 (en) * | 2005-07-15 | 2007-01-18 | Longmoore Kenneth J | Scented multilayer films and method of making |
US20070014992A1 (en) * | 2005-07-15 | 2007-01-18 | Longmoore Kenneth J | Scented multilayer films and method of making |
US8584885B2 (en) * | 2006-07-07 | 2013-11-19 | Covidien Lp | Mailbox style sharps container |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1029049A (en) * | 1964-03-20 | 1966-05-11 | Eastman Kodak Co | Organic aluminium compounds and their use in polymeric compositions |
US4354004A (en) * | 1981-09-28 | 1982-10-12 | Shell Oil Company | Film compositions from olefin polymer blends |
EP0331410A2 (en) * | 1988-02-29 | 1989-09-06 | Shell Oil Company | Hot melt adhesive comprising a butene-1 polymer |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4554321A (en) * | 1982-08-12 | 1985-11-19 | Shell Oil Company | Film compositions of butene polymers |
US5489473A (en) * | 1994-04-07 | 1996-02-06 | Borden, Inc. | Biaxially and monoaxially oriented polypropylene cold seal release film |
CA2164461C (en) * | 1994-12-06 | 2000-08-08 | Tatsuya Tanizaki | Polypropylene composition and uses thereof |
US5798174A (en) * | 1996-02-05 | 1998-08-25 | Aep Industries, Inc. | Biaxially and monoaxially oriented polypropylene cold seal release film |
US5792549A (en) * | 1996-05-30 | 1998-08-11 | Aep Industries, Inc. | Biaxially oriented polypropylene cold seal release films |
US5981047A (en) * | 1996-06-25 | 1999-11-09 | Applied Extrusion Technologies, Inc. | Matte finish biaxially oriented polypropylene film for cold seal release applications |
US5888615A (en) * | 1997-03-04 | 1999-03-30 | Avery Dennison Corporation | Cling films and articles |
US5837177A (en) * | 1997-06-23 | 1998-11-17 | Aristech Chemical Corporation | Controlled nucleation of polypropylene in biaxially oriented films |
US6503611B1 (en) | 1998-12-02 | 2003-01-07 | Toray Plastics (America), Inc. | Cold seal release biaxially oriented polypropylene film for packaging with stable release properties |
-
2002
- 2002-05-08 US US10/141,258 patent/US20030211349A1/en not_active Abandoned
-
2003
- 2003-03-19 CA CA 2483767 patent/CA2483767C/en not_active Expired - Fee Related
- 2003-03-19 MX MXPA04011079A patent/MXPA04011079A/en active IP Right Grant
- 2003-03-19 WO PCT/US2003/008065 patent/WO2003095534A1/en not_active Application Discontinuation
- 2003-03-19 EP EP20030714188 patent/EP1504053A1/en not_active Withdrawn
- 2003-03-19 AU AU2003218196A patent/AU2003218196A1/en not_active Abandoned
-
2004
- 2004-05-14 US US10/845,828 patent/US6919129B2/en not_active Expired - Lifetime
-
2005
- 2005-06-06 US US11/145,611 patent/US7175906B2/en not_active Expired - Lifetime
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1029049A (en) * | 1964-03-20 | 1966-05-11 | Eastman Kodak Co | Organic aluminium compounds and their use in polymeric compositions |
US4354004A (en) * | 1981-09-28 | 1982-10-12 | Shell Oil Company | Film compositions from olefin polymer blends |
EP0331410A2 (en) * | 1988-02-29 | 1989-09-06 | Shell Oil Company | Hot melt adhesive comprising a butene-1 polymer |
Also Published As
Publication number | Publication date |
---|---|
EP1504053A1 (en) | 2005-02-09 |
US20030211349A1 (en) | 2003-11-13 |
US6919129B2 (en) | 2005-07-19 |
AU2003218196A1 (en) | 2003-11-11 |
CA2483767C (en) | 2008-12-16 |
US20040209076A1 (en) | 2004-10-21 |
MXPA04011079A (en) | 2005-02-14 |
CA2483767A1 (en) | 2003-11-20 |
US7175906B2 (en) | 2007-02-13 |
US20050227103A1 (en) | 2005-10-13 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US6458469B1 (en) | Multilayer oriented films with metallocene catalyzed polyethylene skin layer | |
JP3824718B2 (en) | Polyolefin film containing cycloolefin polymer, production method thereof and use thereof | |
US6682822B2 (en) | Multilayer polymeric film | |
EP1567335B1 (en) | Thermoplastic film structures with a low melting point outer layer | |
US6855406B2 (en) | Polyolefin resin composition and shrink film made from the same | |
US5972496A (en) | Film structure | |
US5858552A (en) | Film structure | |
CZ32397A3 (en) | Mixture used for preparing polymeric films | |
WO2006022973A1 (en) | A low density cavitated opaque polymer film | |
US6472077B1 (en) | Block-resistant film | |
KR20000065142A (en) | Moisture-Proof Polypropylene Film | |
CN101405136A (en) | Metallized multi-layer films, methods of manufacture and articles made therefrom | |
US20140004336A1 (en) | Polyolefin laminate film for cardboard lamination | |
US20060024518A1 (en) | Low density cavitated opaque polymer film | |
EP1493560A1 (en) | Biaxially oriented multi-layer polypropylene film and the use thereof | |
US6602609B1 (en) | Multilayer polymeric film with non-migratory antiblock agent | |
US5753363A (en) | Metallized film structure | |
US7175906B2 (en) | Cold seal release film with improved scuff resistance | |
US20130209756A1 (en) | Multilayer Polymeric Film | |
PL174321B1 (en) | Laminated thermally weldable polyethylene foils of oriented structure and their application | |
US6420041B1 (en) | Film with metallizable skin layer | |
JP3291969B2 (en) | Polyethylene-based unstretched film, laminated film and bag | |
JP2662541B2 (en) | Metallized plastic film | |
JP4102716B2 (en) | Biaxially oriented multilayer polypropylene film |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AK | Designated states |
Kind code of ref document: A1 Designated state(s): AE AG AL AM AT AU AZ BA BB BG BR BY BZ CA CH CN CO CR CU CZ DE DK DM DZ EC EE ES FI GB GD GE GH GM HR HU ID IL IN IS JP KE KG KP KR KZ LC LK LR LS LT LU LV MA MD MG MK MN MW MX MZ NI NO NZ OM PH PL PT RO RU SC SD SE SG SK SL TJ TM TN TR TT TZ UA UG US UZ VC VN YU ZA ZM ZW |
|
AL | Designated countries for regional patents |
Kind code of ref document: A1 Designated state(s): GH GM KE LS MW MZ SD SL SZ TZ UG ZM ZW AM AZ BY KG KZ MD RU TJ TM AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LU MC NL PT RO SE SI SK TR BF BJ CF CG CI CM GA GN GQ GW ML MR NE SN TD TG |
|
121 | Ep: the epo has been informed by wipo that ep was designated in this application | ||
WWE | Wipo information: entry into national phase |
Ref document number: 2483767 Country of ref document: CA |
|
WWE | Wipo information: entry into national phase |
Ref document number: PA/a/2004/011079 Country of ref document: MX |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2003714188 Country of ref document: EP |
|
WWP | Wipo information: published in national office |
Ref document number: 2003714188 Country of ref document: EP |
|
WWW | Wipo information: withdrawn in national office |
Ref document number: 2003714188 Country of ref document: EP |
|
NENP | Non-entry into the national phase |
Ref country code: JP |
|
WWW | Wipo information: withdrawn in national office |
Country of ref document: JP |