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Pressure sensitive adhesive (psa) laminates

A technology for laminates and adhesives, used in manufactured products, non-adhesive laminates and PSA laminates, can solve problems such as sticking, improve peel adhesion, improve transparency and haze

Inactive Publication Date: 2009-06-10
EASTMAN CHEM CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Film facing layers and pressure sensitive adhesives have been extruded using extrusion or coextrusion, however processing issues such as sticking to equipment rolls have arisen

Method used

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  • Pressure sensitive adhesive (psa) laminates
  • Pressure sensitive adhesive (psa) laminates
  • Pressure sensitive adhesive (psa) laminates

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0128] Example 1 - Preparation of non-adhesive laminates 1.1-1.10

[0129] Non-adhesive laminates comprising an outer film layer (80%) of primarily polypropylene (PP) and an adhesive base layer (20%) of Kraton G1657 TPE were manufactured on a coextrusion line with a 24 / Two Killion 1 inch single screw extruders operated at 1 L / D. Output from both extruders goes directly into a combining module adapter where the two fluid streams are combined into a 2-layer flow distribution with an adhesive base layer (Kraton TPE) on top to produce the combined polymer melt flow. The combined polymer melt streams entered a 6 inch wide film die where the flow profile was developed to the final laminate dimensions to produce a non-adhesive laminate. The non-adhesive laminates were cast on 30°C chilled rolls and wound into rolls with release paper applied between the layers to prevent possible sticking. The extrusion parameters are listed in the table below.

[0130] Table 1

[0131] ...

Embodiment 2

[0137] Example 2 - Coating Oriented Non-Adhesive Laminate Samples 1.9 and 1.10

[0138] Note that oriented non-adhesive laminates 1.9 and 1.10, 3 X 3 oriented to a nominal 95 micron thickness, had negligible adhesive properties with an approximately 16 micron thick Kraton G-1657 copolymer adhesive base layer. A solution of Regalrez 1018 hydrogenated tackifier resin liquid in cyclohexane was applied to the adhesive base surface of the oriented non-adhesive laminates using a wire coated rod to make PSA laminates 2.1, 2.2 and 2.3. Sufficient cyclohexane was added to lower the viscosity so that the tackifier resin could be easily applied. Coating was done so that the amount of dried Regalrez 1018 applied was about 30% to 40% by weight of the starting non-adhesive laminate sample weight.

[0139] Initially, the surfaces of the PSA laminates 2.1, 2.2 and 2.3 were very viscous due to the application of the tackifier resin liquid. When the PSA laminates were aged in a 60°C oven for ...

Embodiment 3

[0143] Example 3 - Coating Oriented Non-Adhesive Laminate Samples 1.6 and 1.7

[0144] Specimens 1.6 and 1.7 of the oriented non-adhesive laminate samples were coated with an 80% solution of Regalrez 1018 tackifier resin in cyclohexane using a wire coated rod such that application to the surface of the adhesive base layer (Kraton G TPE) The dry coating weight is about 40% to 50% by weight of the starting oriented non-adhesive laminate weight to make PSA laminates 3.1-3.4. The initial oriented non-adhesive laminate showed minimal tack or adhesive properties, but after coating, drying, and aging the PSA laminate at 60°C for 1 hour, it was noted that the PSA laminate exhibited PSA-like properties. PSA laminates were cut into 1 inch wide samples and applied to stainless steel panels to form test specimens for the 180° peel test and the loop snap test. The 180° peel value was determined using ASTM D3330 as a guide. Loop Quick-Tack Adhesion Values ​​were determined using ASTM D-61...

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Abstract

A PSA laminate is provided comprising at least one non-adhesive laminate and at least one tackifier layer; wherein the non-adhesive laminate comprises at least one facestock layer and at least one adhesive base layer; wherein the facestock layer comprises at least one facestock material; wherein the adhesive base layer comprises at least one adhesive base polymer; wherein the tackifier layer comprises at least one tackifier; wherein the tackifier composition is not a PSA; and wherein the tackifier layer is applied to the adhesive base layer side of the non-adhesive laminate to produce the PSA laminate. Processes for producing the PSA laminate are also provided as well as articles comprises the PSA laminates.

Description

field of invention [0001] The present invention relates to non-adhesive laminates and pressure sensitive adhesive (PSA) laminates. The invention also relates to methods of making non-adhesive laminates and PSA laminates. The invention also provides articles of manufacture including, but not limited to, tapes, labels, protective films, signs, decals, and the like. Background of the invention [0002] Typically, the pressure sensitive adhesive laminate comprises at least one polymer component, at least one tackifier component and at least one plasticizer. These components are physically mixed together using heat, water or solvents. These pressure sensitive adhesive (PSA) laminates are used in such articles as labels, tapes, decals, signs, and the like. PSA labels are commonly used to add printed information to items or articles. PSA labels generally include a release liner, a PSA layer disposed on the release liner, and an outer layer which may be a film polymer laminated ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J7/02B29C48/08B29C48/21B29C48/495
CPCC09J7/0207B29C47/145B29L2007/008C09J7/0246B29K2105/0097B29C47/02B29L2009/00B29C47/0021B29C47/067B29C47/065B29C47/56B29C47/884C09J7/38C09J7/22B29C48/15B29C48/08B29C48/21B29C48/22B29C48/307B29C48/9135B29C48/914Y10T428/28Y10T428/14Y10T428/2848B29C48/495
Inventor R·莱恩D·W·邦博洛夫W·M·斯蒂夫尔斯M·E·C·柯奇纳-帕里
Owner EASTMAN CHEM CO
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