Surface protective film

A surface protection film, a representative technology, applied in the direction of pressure-sensitive film/sheet, film/sheet adhesive, adhesive type, etc., can solve the problem of increasing the manufacturing cost of the adhesive layer and the increase in the degree of adhesion. , into the problems of increased depth, etc., to achieve the effects of excellent expandability, inhibition of adhesion deterioration, and prevention of paste residue

Active Publication Date: 2011-08-10
SEKISUI CHEM CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, increasing the thickness of the adhesive layer is not only disadvantageous in terms of manufacturing cost, but also increases the penetration depth of the lens portion (prism) into the adhesive layer, which may increase the degree of adhesive force over time.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～8、 comparative example 1～7

[0241] 30 parts by weight of Alcon P100 (manufactured by Arakawa Chemical Industry Co., Ltd.) as a tackifier, and 30 parts by weight of Irganox 1010 (Ciba Specialty Chemicals) 1 part by weight to obtain each adhesive composition. Its composition is shown in Table 2 below.

[0242] Using polypropylene (J715M manufactured by Prime Polymer Co., Ltd.) as the base material, the base material and each binder composition were coextruded by the T-die method, thereby obtaining a base material layer formed with a thickness of 34 μm. The surface protection films of Examples 1-8 and Comparative Examples 1-7 obtained by laminating and integrating with an adhesive layer with a thickness of 6 μm, and wound on a paper core with an inner diameter of 3 inches.

[0243] (Evaluation)

[0244] The following items were evaluated about each surface protection film obtained by the said method. The results are shown in Table 3.

[0245] (1) Film-forming properties

[0246] The appearance of each ...

Embodiment 9

[0271] In 100 parts by weight of the copolymer composition of Synthesis Example 4, 18 parts by weight of AlconP100 (manufactured by Arakawa Chemical Industry Co., Ltd.) as a tackifier and 1 part by weight of Irganox1010 (manufactured by Ciba Specialty Chemicals) as an antioxidant were mixed as 0.5 parts by weight of Tinuvin 326 (manufactured by Ciba Specialty Chemicals) as an ultraviolet absorber was kneaded to obtain an adhesive composition.

[0272] Using polypropylene (J715M manufactured by Prime Polymer Co., Ltd.) as the base material, the base material and the adhesive composition were co-extruded by the T-die method, thereby obtaining a base material layer with a thickness of 34 μm and a thickness of A surface protection film obtained by laminating and integrating an adhesive layer of 6 μm, and wound around a paper core with an inner diameter of 3 inches.

Embodiment 10、11、13、 comparative example 8～10

[0274] The adhesive composition was mixed as shown in Table 4, and the roll body of the surface protection film was obtained by the method similar to Example 9.

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Abstract

An adhesive composition characterized by containing a polymer (i), which is a copolymer having a structure represented by the following general formula: [A-B]n (wherein n = 1-3) or a hydrogenated product thereof, and a polymer (ii), which is a copolymer having a structure represented by the following general formula: A-B-A or the following general formula: (A-B)x-Y (wherein x >= 1 and Y represents a residue of a coupling agent) or a hydrogenated product thereof. The adhesive composition is also characterized in that the total aromatic alkenyl compound unit content in the polymers (i) and (ii)is 30-50 wt%, and the weight ratio between the total amount of A and the total amount of B contained in the polymers (i) and (ii) is within the range of from 5:95 to 25:75. In this connection, A represents a polymer block mainly composed of aromatic alkenyl compound units, and B represents a polymer block which is an aromatic alkenyl-conjugated diene random copolymer block having an aromatic alkenyl compound unit content of 10-35 wt%.

Description

technical field [0001] The present invention relates to surface protection films. Background technique [0002] In the past, in order to protect the surface of various components such as optical devices, metal plates, painted metal plates, resin plates, and glass plates, lamination of adhesives on one surface of a film-shaped base material has been widely used. A surface protection film (usually, also called a protection tape, a masking tape or a surface protection sheet, etc.) formed by a layer. In particular, in recent years, surface protection films have been used on optical components for liquid crystal displays. Optical components include components with concave-convex surfaces such as prism sheets and diffusion films. In order not to cause damage to the unevenness, the surface of these parts (especially the outer surface of the unevenness) should be protected with a surface protection film before use, but it is impossible to obtain a large contact when the surface pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J7/02C09J109/06C09J125/10C09J153/02C09J7/22C09J7/38
CPCC09J153/025C09J7/0246C08F8/04C09J2423/006G02F2202/28G02F2001/133607C09J2453/00C09J153/02C09J7/38C09J7/22C08L2666/02G02F1/133607C08F297/04C08F297/044C09J7/241C09J125/08C09J153/00C09J2203/318C09J2301/40C09J2301/312
Inventor 丰岛克典多田博士家田泰享野世溪元长尾功弘川村真教长谷川研二大久保明彦中村丈夫佐野拓哉
Owner SEKISUI CHEM CO LTD
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