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Surface protective film

A surface protection film and adhesive layer technology, applied in the direction of heat-activated film/sheet, film/sheet release liner, film/sheet adhesive, etc., can solve the problem of difficult removal

Pending Publication Date: 2022-04-01
トレデガーサーフェイスプロテクションエルエルシー
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The data listed in Table 3 of U.S. Patent No. 10150896 shows that the adhesion of the surface protection film to the polycarbonate substrate increases after the laminate has been subjected to high temperature, thereby making it more difficult to remove the surface protection film, which is important for Undesirable for some applications

Method used

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Embodiment

[0046] A series of three-layer surface protection films 100 were extruded on a co-extruded cast film line using the same conditions. The target total thickness of each film 100 is approximately 50 μm (microns), and 15% of the total thickness is attributable to the release layer 110, approximately 65% ​​of the total thickness is attributable to the core layer 120, and approximately 20% of the total thickness is attributable to the core layer 120. % attributable to the adhesion layer 130. The release layer 110 of each film 100 consists essentially of LDPE. The core layer 120 of each film 100 is a blend of about 60 wt% HDPE and about 40 wt% LDPE. For the adhesive layer 130, different hydrogenated styrene block copolymers were blended with LDPE and HDPE. Table I below lists a summary of different hydrogenated styrenic block copolymers for the adhesion layer 130.

[0047] Table I: Summary of Styrenic Block Copolymers for Adhesion Layer Blends

[0048]

[0049] Kraton TM MD ...

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Abstract

A surface protective film includes an adhesive layer including a blend of a first hydrogenated styrene block copolymer, a second hydrogenated styrene block copolymer different from the first hydrogenated styrene block copolymer, and polyethylene. The surface protective film has an adhesion build-up value of less than 2.5 after the adhesion layer has been attached to the textured polycarbonate substrate and heated to 90 DEG C for 10 minutes.

Description

[0001] Cross-Referenced Related Patent Applications [0002] This application claims the benefit of priority to U.S. Provisional Patent Application No. 62 / 871,776, filed July 9, 2019, the entire contents of which are hereby incorporated by reference. technical field [0003] The present invention generally relates to a surface protection film for protecting a substrate. Background technique [0004] Surface protection films, also known as masking films, are commonly used to provide a physical barrier against damage, contamination, scratches, marring and / or other damage to the substrates to which they are adhered. Surface protection films can be applied to delicate, sensitive substrates used as components of electronic displays, and protect said substrates through one or more subsequent processing steps in the manufacturing process, as well as during shipping, and / or Protect the substrate during storage prior to use. [0005] Commonly used surface protection films achieve a...

Claims

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Application Information

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IPC IPC(8): B32B27/00B32B27/18B32B27/36
CPCC09J7/30C09J2423/04C09J2453/00C09J123/0815C09J153/025C08L2205/02C08L2205/03C09J2203/318C08L23/06C08L53/025B32B27/302B32B27/32B32B27/365B32B27/06B32B37/26B32B37/12B32B7/12C09J7/40B32B2323/043B32B2323/10B32B2369/00B32B2325/00B32B2255/10B32B2457/20C08L2205/025C08L2207/066C09J7/243C09J7/35C08F236/06C08F236/08C08F8/04C08L25/08C09J2203/31C09J2409/00C09J2423/041C09J2423/045C09J2423/105C09J2425/00C09J2469/006C08L2205/035C08L2207/062C09J7/201C09J2301/312C09J125/08C09J7/387C09J2423/00C09J123/06C09J123/08C09J7/401C09J2423/006
Inventor S·苏巴马尼亚姆R·桑托索
Owner トレデガーサーフェイスプロテクションエルエルシー