JP2012224868A - Cushioning device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cushioning device.SOLUTION: The present invention is directed to cushioning devices comprising a pressure sensitive adhesive. In particular, the invention concerns the use of pressure sensitive adhesive materials to improve the hold of soft gel cushioning devices. A cushioning device comprising a sticky surface comprises a gel material bound to a thermoplastic film material having a polarity compatible with the gel material, wherein the thermoplastic film material further comprises a pressure sensitive adhesive located on a surface of the film material opposite to the surface that is bonded to the gel material.

Description

(Background of the Invention)
The present invention relates to a cushion device comprising a pressure sensitive adhesive. In particular, the present invention relates to the use of pressure sensitive adhesive materials to improve the retention of soft gel cushion devices. One of the main attributes of a footwear cushion is that it prevents the footwear from rubbing sensitive areas of the skin (especially the heel area). However, in order to achieve all desired attributes of the cushion, the cushion needs to remain firmly in place during the movement associated with normal use of the footwear. Cushion devices made from soft gels are known in the art and are desirable for their comfort, flexibility, durability and appearance. Schering-Plough Healthcare Products, Inc., the assignee of the present invention. Are trade names of Dr. Cushion devices are sold under Scholl's® Gel Heel Liner, which comprises a thermoplastic polyurethane (TPU) film bonded to a polyurethane (PU) gel, which PU gel Manufactured to have a sticky surface. However, no additional adhesive is used in this product. The Heel Liner is packaged with a release film to prevent stickiness of the adhesive surface of the PU gel, which is then attached to the shoe to hold the liner in place. . The TPU film provides a non-tacky surface on the opposite side of the sticky surface that contacts the wearer's foot, sock, or hosiery.

  However, it has been found that tacky PU gels do not hold the liner in place over long periods of use as may be desired for cushioning elements. Pressure sensitive adhesive materials are used in the art. However, direct modification of the tacky PU gel and the pressure sensitive adhesive did not result in a cushioning element with a stronger holding force.

  Accordingly, a cushioning device that provides the benefits of gel and provides long-term retention within the shoe being deployed is desirable. In addition, a method of manufacturing a gel cushion device having a pressure sensitive adhesive is also desirable. These and other advantages are the result of the invention as described and claimed herein.

(Summary of the Invention)
The present invention provides a cushion device, the cushion device comprising at least one of a polyurethane gel material comprising a top surface and a bottom surface, bonded to one or both of the top and bottom surfaces of the polyurethane gel material. A layer of thermoplastic polyurethane film material and a layer of pressure sensitive adhesive bonded to at least one of the at least one layer of thermoplastic polyurethane film material, the pressure sensitive adhesive comprising the polyurethane gel material Located on the surface of this thermoplastic polyurethane film opposite to the surface in contact with the bottom surface.

  The present invention also provides a gel cushion device comprising an adhesive surface, the device comprising a gel material bonded to a thermoplastic film material, the thermoplastic film material having good compatibility with the gel material. And the thermoplastic film material further comprises a pressure sensitive adhesive, the pressure sensitive adhesive being located on the surface of the film material opposite the surface that bonds to the gel material.

  The present invention further provides a gel cushion device comprising an adhesive surface, the device comprising a single layer of gel material having an upper surface and a lower surface, and two layers of thermoplastic film material, each film material comprising: An upper surface and a lower surface, wherein the upper surface of the gel material is bonded to the lower surface of one of the layers of the film material, and the lower surface of the gel material is the other of the layers of the film material At least one of these layers of film material is provided with a pressure sensitive adhesive on the surface opposite to the surface that is bonded to the gel material, thereby Provides a sticky surface.

The present invention also provides a method of constructing a gel cushion device comprising an adhesive surface, the method comprising filling a mold cavity comprising at least one layer of thermoplastic film material with the gel material, A layer of a thermoplastic film material comprising an upper surface and a lower surface, and curing the gel material to form a solid gel such that the cured gel material is bonded to the film material. , And at least one of these layers of thermoplastic film material comprises a pressure sensitive adhesive on the surface opposite the surface that is bonded to the gel material, whereby the adhesive surface of the device I will provide a.
For example, the present invention provides the following items.
(Item 1)
A cushioning device, wherein the cushioning device comprises a single layer of polyurethane gel material comprising a top surface and a bottom surface, at least one layer bonded to one or both of the top surface and the bottom surface of the polyurethane gel material A thermoplastic polyurethane film material, and a layer of pressure sensitive adhesive bonded to one of the at least one thermoplastic polyurethane film material, the pressure sensitive adhesive comprising the bottom of the polyurethane gel material. A cushioning device located on the surface of the thermoplastic polyurethane film opposite the surface in contact with the surface.
(Item 2)
The cushion device according to item 1, wherein the pressure-sensitive adhesive contains an acrylic adhesive, a methacrylate adhesive, and a rubber-based adhesive.
(Item 3)
The cushion device of item 1, wherein the pressure sensitive adhesive is a styrene copolymer based adhesive or a silicone based adhesive, and combinations thereof.
(Item 4)
The styrene copolymer is a styrene-isoprene-styrene (SIS) copolymer, a styrene-ethylene-butylene-styrene (SEBS) copolymer, a styrene-butadiene-styrene (SBS) copolymer comprising at least one tackifier, or combinations thereof The cushion device according to item 3, comprising:
(Item 5)
Item 3. The cushion device of item 2, wherein the acrylic adhesive comprises ethylene ethyl acrylate (EEA) copolymer, ethylene methyl acrylate (EMA) copolymer, or a combination thereof.
(Item 6)
The cushion device of claim 1, wherein the layer of pressure sensitive adhesive has a thickness of about 0.0125 mm to about 0.25 mm.
(Item 7)
The cushion device of claim 1, wherein the polyurethane gel material has a Shore 00 hardness of about 10 to about 80.
(Item 8)
The cushion device of claim 1, wherein the polyurethane gel material has a Shore 00 hardness of about 30 to about 60.
(Item 9)
The cushion device of claim 1, wherein the polyurethane gel material has a Shore 00 hardness of about 50.
(Item 10)
The cushion device according to item 1, wherein the polyurethane gel material has a thickness of 0.3 mm to 3 mm.
(Item 11)
The cushion device of claim 1, wherein the thermoplastic polyurethane film material has a Shore A hardness of about 40 to about 95.
(Item 12)
The cushion device of item 1, wherein the thermoplastic polyurethane film material has a thickness of 0.025 mm to 0.25 mm.
(Item 13)
The cushion device of claim 1, wherein a layer of thermoplastic polyurethane film material is bonded to both the top surface and the bottom surface of the polyurethane gel material.
(Item 14)
14. A cushioning device according to item 13, wherein the individual layers of the thermoplastic polyurethane film have the same thickness.
(Item 15)
14. A cushioning device according to item 13, wherein the individual layers of the thermoplastic polyurethane film have different thicknesses.
(Item 16)
The cushion device of claim 1, wherein the at least one thermoplastic polyurethane film has a thickness of at least 0.025 mm.
(Item 17)
A gel cushion device comprising an adhesive surface, the device comprising a gel material bonded to a thermoplastic film material, the thermoplastic film material having good compatibility with the gel material, The gel cushion device, wherein the plastic film material further comprises a pressure sensitive adhesive located on the surface of the film material opposite the surface bonded to the gel material.
(Item 18)
Item 18. The cushion device according to Item 17, wherein the gel material is a polyurethane gel material.
(Item 19)
Item 18. The cushion device according to Item 17, wherein the thermoplastic film material is a polyurethane material.
(Item 20)
18. A cushion device according to item 17, wherein the gel material is a SEBS gel material.
(Item 21)
18. A cushion device according to item 17, wherein the thermoplastic film material is a SEBS material.
(Item 22)
Item 18. The cushion device according to item 17, wherein the pressure-sensitive adhesive contains an acrylic adhesive, a methacrylate adhesive, and a rubber-based adhesive.
(Item 23)
18. A cushion device according to item 17, wherein the pressure sensitive adhesive is a styrene copolymer based adhesive or a silicone based adhesive, and combinations thereof.
(Item 24)
The styrene copolymer is a styrene-isoprene-styrene (SIS) copolymer, a styrene-ethylene-butylene-styrene (SEBS) copolymer, a styrene-butadiene-styrene (SBS) copolymer comprising at least one tackifier, or combinations thereof Item 24. The cushion device according to Item 23.
(Item 25)
24. A cushion device according to item 23, wherein the acrylic adhesive contains ethylene ethyl acrylate (EEA) copolymer, ethylene methyl acrylate (EMA) copolymer, or a combination thereof.
(Item 26)
18. A cushion device according to item 17, wherein the pressure sensitive adhesive has a thickness of about 0.0125 mm to about 0.25 mm.
(Item 27)
18. A cushion device according to item 17, wherein the gel material has a Shore 00 hardness of about 10 to about 80.
(Item 28)
18. A cushion device according to item 17, wherein the material has a Shore 00 hardness of about 30 to about 60.
(Item 29)
18. A cushion device according to item 17, wherein the material has a Shore 00 hardness of about 50.
(Item 30)
Item 18. The cushion device according to Item 17, wherein the gel material has a thickness of 0.3 mm to 3 mm.
(Item 31)
18. A cushioning device according to item 17, wherein the thermoplastic film material has a Shore A hardness of about 40 to about 95.
(Item 32)
18. A cushion device according to item 17, wherein the thermoplastic film material has a thickness of 0.025 mm to 0.25 mm.
(Item 33)
Item 18. The cushion device of item 17, wherein the thermoplastic film material has a thickness of at least 0.025 mm.
(Item 34)
A gel cushion device comprising an adhesive surface, the device comprising a layer of gel material having an upper surface and a lower surface, and two layers of thermoplastic film material, each film material having an upper surface and a lower surface The upper surface of the gel material is bonded to the lower surface of one of the layers of film material, and the lower surface of the gel material is over the other of the layers of film material. And at least one of the layers of the film material comprises a pressure sensitive adhesive on the surface opposite the bonded surface of the gel material, whereby the adhesive surface of the device Providing a gel cushion device.
(Item 35)
35. A cushion device according to item 34, wherein the gel material is a polyurethane gel material.
(Item 36)
35. A cushion device according to item 34, wherein the thermoplastic film material is a polyurethane material.
(Item 37)
35. A cushion device according to item 34, wherein the gel material is a SEBS gel material.
(Item 38)
35. A cushion device according to item 34, wherein the thermoplastic film material is a SEBS material.
(Item 39)
35. The cushion device of item 34, wherein the pressure sensitive adhesive comprises an acrylic adhesive, a methacrylate adhesive, a rubber-based adhesive.
(Item 40)
35. A cushioning device according to item 34, wherein the pressure sensitive adhesive is a styrene copolymer based adhesive or a silicone based adhesive, and combinations thereof.
(Item 41)
The styrene copolymer is a styrene-isoprene-styrene (SIS) copolymer, a styrene-ethylene-butylene-styrene (SEBS) copolymer, a styrene-butadiene-styrene (SBS) copolymer comprising at least one tackifier, or combinations thereof The cushion device according to item 40, comprising:
(Item 42)
41. A cushion device according to item 40, wherein the acrylic adhesive contains ethylene ethyl acrylate (EEA) copolymer, ethylene methyl acrylate (EMA) copolymer, or a combination thereof.
(Item 43)
35. The cushion device of item 34, wherein the pressure sensitive adhesive has a thickness of about 0.0125 mm to about 0.25 mm.
(Item 44)
35. A cushion device according to item 34, wherein the gel material has a Shore 00 hardness of about 10 to about 80.
(Item 45)
35. A cushion device according to item 34, wherein the gel material has a Shore 00 hardness of about 30 to about 60.
(Item 46)
35. A cushion device according to item 34, wherein the gel material has a Shore 00 hardness of about 50.
(Item 47)
35. A cushion device according to item 34, wherein the gel material has a thickness of 0.3 mm to 3 mm.
(Item 48)
35. A cushion device according to item 34, wherein the thermoplastic film material has a Shore A hardness of about 40 to about 95.
(Item 49)
35. A cushion device according to item 34, wherein the thermoplastic film material has a thickness of 0.025 mm to 0.25 mm.
(Item 50)
35. A cushion device according to item 34, wherein the thermoplastic film material has a thickness of at least 0.025 mm.
(Item 51)
A method of constructing a gel cushion device comprising an adhesive surface, the method comprising filling a gel cavity with a gel material comprising at least one layer of thermoplastic film material, the method comprising: And a thermoplastic film material comprising an upper surface and a lower surface, and curing the gel material to form a solid gel such that the cured gel material is bonded to the film material, and the thermoplastic A method wherein at least one of the layers of film material comprises a pressure sensitive adhesive on a surface opposite to the surface bonded to the gel material, thereby providing the tacky surface of the device.
(Item 52)
The mold cavity includes two layers of thermoplastic film material, so that the cured gel material has the lower surface of one of the layers of film material and the other of the layers of film material. 52. A method according to item 51, wherein the method is combined with an upper surface.
(Item 53)
The filling step includes injecting a gel material into a mold cavity containing the thermoplastic film material, wherein at least one of the thermoplastic film materials is in contact with the injected gel material; 52. The method of item 51, comprising a pressure sensitive adhesive on the opposite surface.
(Item 54)
52. The method of item 51, wherein the mold cavity further comprises a release liner material disposed between the pressure sensitive adhesive and a mold shape.
(Item 55)
52. The method of item 51, wherein the mold shape further comprises a surface treatment that prevents bonding of the pressure sensitive adhesive to the mold shape.
(Item 56)
52. A method according to item 51, wherein the gel material is a polyurethane gel material.
(Item 57)
52. The method of item 51, wherein the gel material is a SEBS gel material.
(Item 58)
52. A method according to item 51, further comprising removing the cured gel material from the mold cavity and die-cutting the material into a desired shape.

FIG. 1A illustrates a cross-section of a prior art cushioning element. FIG. 1B illustrates a cross-section of an exemplary embodiment of the cushion element of the present invention. FIG. 2 illustrates a cross-section of a second exemplary embodiment of the cushion element of the present invention.

(Detailed explanation)
As illustrated in FIG. 1, the product of the present invention provides a means for attaching a pressure sensitive adhesive to a gel material to provide an extra retention capability, and is a prior art TPU / PU molded cushion. Has advantages over elements. FIG. 1A shows a cross-section of a prior art material comprising a gel material (104) bonded to a film material (102). This film material provides an outer surface that prevents friction and allows smooth contact with the skin or clothing. FIG. 1B shows a cross-section of an exemplary embodiment of the present invention in which a layer of gel material having a top surface and a bottom surface is a two-layer film material bonded to each surface of the gel material. (102, 103). In the practice of the present invention, the gel material may include, for example, a polyurethane gel, a styrene-based gel, or a silicone gel. Gel materials useful in the present invention may typically have a Shore 00 hardness of about 10 to about 80, preferably about 30 to about 60. In certain embodiments of the invention, a polyurethane gel material is used and may have a Shore 00 hardness of about 50. This gel material may typically have a thickness of 0.3 mm to 3 mm. The film material may comprise a thermoplastic polymer film material that is compatible with the gel material used in the cushion. For example, if a polyurethane gel material is used in the cushion, the film material will likely contain a thermoplastic polyurethane film material. Similarly, if a SEBS gel material is used in the cushion, the film material will likely contain a SEBS thermoplastic film. These film materials typically can have a Shore A hardness of about 40 to about 95 and can typically have a thickness of 0.025 mm to 0.25 mm. In certain embodiments according to the present invention where more than one film is used, the individual layers of the film have the same thickness. In certain further embodiments according to the invention, the individual layers of the film have different thicknesses. In practice, changing the thickness of the film affects the softness and flexibility of the film, and likewise affects the softness and flexibility of the final gel cushion product. In certain embodiments, a thermoplastic polyurethane film is used and can be at least 0.025 mm thick.

  As used herein, a polyurethane material includes a plurality of urethane linkages, and either an aliphatic isocyanate prepolymer or an aromatic isocyanate prepolymer and combinations thereof, a bifunctional polyol or It is understood to include polymers consisting of both trifunctional polyol polymers or prepolymers. This polyurethane material may also include other types of chemical bonds formed from the reaction of polyisocyanates (urea bonds, isocyanurate bonds, oxazolidone bonds, biuret bonds, allophanate bonds, combinations thereof, etc.) as required. , But not limited to). The polyurethane gel material is typically formed by reacting a polyisocyanate and a polyol. Examples of polyisocyanates include those formed from aliphatic isocyanate prepolymers or aromatic isocyanate prepolymers, or combinations thereof. Examples of polyols include polymers or prepolymers of bifunctional or trifunctional polyols. Examples of polyols used include polyether polyols (eg, poly (ethylene oxide) and poly (propylene oxide)), modified polyether polyols, polytetramethylene glycol, condensed polyester polyols (reacting dicarboxylic acids with diols). Lactone type polyester polyol (produced by ring-opening polymerization such as ε-caprolactone), polycarbonate polyol, and vinyl polymer having a hydroxyl group introduced therein (for example, a polyol having polyisobutylene as the main chain). Can be mentioned.

  Gel layers are also known as non-foam elastomers (e.g. viscoelastic polymers or silicone gels) and have a high level of damping when tested by dynamic mechanical analysis performed in the range of -50 <0> C to 100 <0> C. Material class). Gel materials include Kraton family styrene-olefin-rubber block copolymers, thermoplastic polyurethanes, thermoset polyurethanes, thermoplastic polyolefins, polyamides, polyureas, polyesters, and other polymeric materials that soften reversibly as a function of temperature. Can be mentioned, but is not limited to these. Preferred elastomers are Kraton block copolymers of styrene / ethylene-co-butylene / styrene (SEBS) or styrene / butadiene / styrene (SBS) with mineral oil incorporated into the matrix as a plasticizer.

  As used herein, a pressure sensitive adhesive (also known as a contact adhesive) forms a viscoelastic bond that is aggressive and permanently tacky and requires only a slight pressure. An adhesive that adheres and does not require activation by water, solvent or heat. Pressure sensitive adhesives are typically available in solvent and latex based or water based forms and are often based on non-crosslinked rubber adhesives, acrylics or polyurethanes.

  In certain embodiments of the invention, the pressure sensitive adhesive is an acrylic and methacrylate adhesive, a rubber-based pressure sensitive adhesive, a styrene copolymer comprising at least one tackifier (eg, styrene-isoprene-styrene). (SIS) copolymers and styrene-butadiene-styrene (SBS) copolymers), and silicones. Acrylic adhesives often use acrylate systems (eg, ethylene ethyl acrylate (EEA) copolymers or ethylene methyl acrylate (EMA) copolymers), and these systems are used to form hot melt PSA adhesives. The Natural rubber, synthetic rubber or elastomeric adhesives can typically contain various materials such as silicone, polyurethane, chloroprene, butyl, polybutadiene, isoprene or neoprene. Rubbers and elastomers are characterized by their high flexibility and elasticity.

  In certain embodiments, the pressure sensitive adhesive material may include an acrylate-based adhesive material. The layer thickness of the pressure sensitive adhesive material can be varied by those skilled in the art according to the adhesive material used and the desired tackiness. In the practice of certain exemplary embodiments of the invention, the pressure sensitive adhesive may have a thickness of about 0.0125 mm to about 0.25 mm.

  A further aspect of the invention includes a method of making a cushioning element containing a polyurethane gel material, the method comprising the step of combining the polyurethane gel and a thermoplastic film material, the thermoplastic film material comprising: Contains a pressure sensitive adhesive. In the preparation of one embodiment of the present invention, it has been discovered that the pressure sensitive adhesive layer cannot bond directly to the soft polyurethane gel during the molding process. To overcome this limitation, a layer of thermoplastic film material with a pressure sensitive adhesive layer was added to the mold and bonded to the polyurethane gel.

  In certain embodiments of the invention, the cushion element is prepared by a direct molding process, in which the gel material is applied directly to the mold (eg, by injecting a gel prepolymer into the mold cavity). During the direct molding process, before the gel material is injected, the film material layer containing the pressure sensitive adhesive is placed on the mold cavity so that the adhesive is on the side of the film material closest to the mold. Then the PU gel material is poured into the mold so as to cover the film material. The mold can be treated to prevent bonding of the pressure sensitive adhesive, or a release liner material can be applied to the mold first and before the film material is applied to the mold. In certain embodiments of the invention, the mold can be preheated to the desired curing temperature prior to injecting the gel material, or it can be heated after all the material has been filled into the mold. For example, when using a polyurethane gel material according to the present invention, the temperature of the mold is typically 85 ° C. to 95 ° C. and the cycle time is about 8 minutes. The pressure is typically low and is not critical for this type of operation. However, this pressure is high enough to fill the cavity mold with the polyurethane prepolymer.

  As illustrated in FIG. 2, release liner 106 is shown in contact with the exposed surface of the PSA layer illustrated in FIG. 1B. In this exemplary embodiment of the invention, the gel cushion can be manufactured by a direct molding process. In this manner, the thin release liner laminate constitutes the bottom layer assembly of the gel cushion element and also helps to facilitate removal of the formed gel cushion element from the mold. The top thermoplastic film constitutes the cover layer of the liner during the molding process. The release liner can be maintained on the product when packaged for sale and can be disposed of prior to applying the gel cushion element to a surface (eg, shoes or other footwear). In certain embodiments, the cushion device may further comprise a synthetic rubber foam, a woven cotton fabric, a synthetic fiber, a knitted fabric, a polyvinyl chloride film, and / or a synthetic nonwoven fabric.

  The product of the present invention is formed into any shape suitable for use as a cushioning device (eg, to be inserted into footwear to prevent rubbing between sensitive skin and the hard or exposed surface of the footwear). obtain. This cushion element also requires other garments (eg hats, helmets, protective sports gear (eg elbow pads and knee pads)) and extra padding for comfort, resizing and / or safety Other clothing). Cushion elements according to the present invention may also be applied to surfaces that contact body parts (eg, chairs, desks, bags, tables, doors and door frames, among others) to provide protection from damage. Depending on the size and shape of the object to which the cushioning element is attached, the particular shape better protects various areas of the body from contact with that object. In certain exemplary embodiments, these products are molded into, for example, circular, parabolic, star, square, rectangular, rounded rectangular, and meniscal shapes, among others. The appropriate shape of the cushion element can be determined based on the size and surface of the object to which the cushion element is attached. In an alternative exemplary embodiment, the cushioning element may be provided as a sheet of material that can be cut into a desired shape by the user. The sheet of material can also be provided in a preformed shape that can be removed if desired for proper protection from contact with an object.

(Experiment)
A human wear test was performed to compare an unmodified polyurethane gel cushion with a tacky gel surface with the modified polyurethane gel cushion of the present invention containing a pressure sensitive adhesive. This test was performed to determine whether the cushion device according to the present invention provided adequate adhesion performance when compared to an unmodified polyurethane gel fold liner. Prior to the wear test, a probe tack test is performed on both devices in accordance with ASTM D 2979-01, with the adhesive and the adhesive under a specified load at a known duration and at a specified temperature. After a short period of contact, the force required to separate the adhesive from the adhesive was measured. These devices were also tested for shear retention according to PSTC-107A. PSTC-107A measures the ability of an adhesive material to remain bonded under a constant load applied parallel to the surface of the material and the substrate, especially when applied to vertical standard steel panels. Measure shear adhesion. These two devices were determined to have the following adhesive tack and shear retention:

プローブ粘着力試験および剪断保持力試験の結果に基づいて、当業者は、これらの２つの踵ライナーデバイスが、本質的に同じ接着粘着力および剪断保持力を有し、そして使用において同じ接着性能（すなわち、通常の着用中の靴内で適所に留まる能力）を有すると予測されることを認識する。

Based on the results of the probe tack test and shear retention test, one of ordinary skill in the art will recognize that these two scissor liner devices have essentially the same adhesion tack and shear retention and have the same adhesion performance in use ( That is, it is expected to have the ability to stay in place within the normal wearing shoe.

  The adhesive performance of the heel liner cushions formed in accordance with the present invention was then evaluated in a wearing test by volunteers who had these devices inserted into shoes and worn for 3 days in normal use. These test subjects were divided so that 23 subjects evaluated the unmodified sputum liner while 22 subjects evaluated the sputum liner modified with PSA. Both the unmodified and modified heel liners were similar in appearance, so the test subject did not know which device he was wearing. Three days later, test subjects were asked to rate consent or disagreement regarding whether the cushion remained in place during normal use, with a rating according to a 7-point scale.

上から３つの等級付けの回答の合計は、踵ライナークッション接着の性能のポジティブな意見を示し、そして下から３つの等級付け回答の合計は、踵ライナークッションの性能に対するネガティブな意見を示した。これらの結果は以下のとおりであった：

The sum of the three grading responses from the top gave a positive opinion of the performance of the heel liner cushion adhesion, and the sum of the three grading responses from the bottom gave a negative opinion on the performance of the heel liner cushion. These results were as follows:

示されるように、本発明に従って製造された、ＰＳＡを含有する改変踵ライナーは、使用者から決定的にポジティブな意見を得た。逆に、未改変踵ライナーは、ポジティブな意見とネガティブな意見とのあいまいな結果を示した。着用試験結果の統計学的分析（０．００４１のｐ）は、本発明によるＰＳＡで改変されたライナーが、未改変バージョンよりも良好な接着性能を着用中に提供することを示した。この結果は、クッションに対するプローブ粘着力試験および剪断保持力試験に基づいては、予測不可能であった。

As shown, the modified wrinkle liner containing PSA made in accordance with the present invention has received a positive positive opinion from the user. Conversely, the unmodified kite liner showed ambiguous results between positive and negative opinions. Statistical analysis of the wear test results (p of 0.0041) showed that the liner modified with PSA according to the present invention provided better adhesion performance during wearing than the unmodified version. This result was unpredictable based on probe adhesion and shear retention tests on the cushion.

  Several embodiments of the present invention are specifically described herein. However, it will be understood that modifications and variations of this invention are covered by the above teachings and are within the scope of the appended claims without departing from the spirit and intended scope of this invention.

Claims (1)

Invention described in this specification.

Images