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Self-adhesive surface protection film

A self-adhesive and protective film technology, applied in the direction of film/sheet adhesives, adhesives, etc., to achieve the effect of excellent processing suitability

Pending Publication Date: 2019-09-27
TOYOBO CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0016] The problem to be solved by the present invention is to provide a film that exhibits strong adhesive force to the covering body, can be used for various covering bodies, and is less likely to cause partial elongation or tearing of the film when the adhesive film is stored in a roll state and then sent out. Self-adhesive surface protection film with excellent film processing suitability due to problems such as deformation

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0100] (Preparation of substrate layer)

[0101] Homopolypropylene resin (manufactured by Sumitomo Chemical Co., Ltd.: FLX80E4, 230° C. MFR: 7.5 g / 10 min) was used for 100 mass % A single-screw extruder was melt-extruded at 240° C. to form a substrate layer.

[0102] (Preparation of adhesive layer)

[0103] A styrene-based elastomer (hydrogenated block copolymer of styrene and butadiene, manufactured by Asahi Kasei Chemical Co., Ltd.: TUFTEC (registered trademark) H1221, a styrene component ratio of 12% by mass, an ethylene component ratio of 18% by mass, 230°C MFR: 4.5g / 10min) 40% by mass, ethylene-α-olefin copolymer (manufactured by Sumitomo Chemical Co., Ltd.: CX3007, 190°C MFR: 3.7g / 10min, modulus of elasticity: 26MPa) 50% by mass, and petroleum resin ( Manufactured by Arakawa Chemical Industry Co., Ltd.: 10% by mass of Alcon (registered trademark) P125) was melt-extruded at 210° C. with a 45 mmφ single-screw extruder to form an adhesive layer.

[0104] (production of ...

Embodiment 2

[0109] The base material layer and the release layer were the same as in Example 1, but the adhesive layer was changed to the following, and three types of three-layer unstretched films were obtained by the same manufacturing method as in Example 1.

[0110] (Preparation of adhesive layer)

[0111] Styrenic elastomer (manufactured by Asahi Kasei Chemical Co., Ltd.: TUFTEC (registered trademark) H1221, styrene component ratio 12 mass%, ethylene component ratio 18 mass%, 230°C MFR: 4.5g / 10min) 60 mass% and ethylene- α olefin copolymer (manufactured by Sumitomo Chemical Co., Ltd.: CX3007, 190°C MFR: 3.7g / 10min, elastic modulus: 26MPa) 40% by mass was melt-extruded at 210°C with a 45mmφ single-screw extruder to make a bonded layer.

Embodiment 3

[0113] The base material layer and the release layer were the same as in Example 1, but the adhesive layer was changed to the following, and three types of three-layer unstretched films were obtained by the same manufacturing method as in Example 1.

[0114] (Preparation of adhesive layer)

[0115] A styrene-based elastomer (hydrogenated block copolymer of styrene and butadiene, manufactured by Asahi Kasei Chemical Co., Ltd.: TUFTEC (registered trademark) H1221, a styrene component ratio of 12% by mass, an ethylene component ratio of 18% by mass, 230°C MFR: 4.5g / 10min) 40% by mass, ethylene-α-olefin copolymer (manufactured by Sumitomo Chemical Co., Ltd.: VL100, 190°C MFR: 0.8g / 10min, modulus of elasticity: 64MPa) 50% by mass, and petroleum resin ( Manufactured by Arakawa Chemical Industry Co., Ltd.: 10% by mass of Alcon (registered trademark) P125) was melt-extruded at 210° C. with a 40 mmφ single-screw extruder to form an adhesive layer.

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Abstract

This self-adhesive surface protection film comprises adhesive layers which are laminated on both surfaces of a polypropylene resin substrate layer by means of co-extruding a release layer on the surfaces opposite the adhesive layers, wherein the resin forming the adhesive layers comprises at least a polyethylene resin and a styrene-type elastomer selected from, for example, block copolymer hydrogenation agents having styrene polymer blocks and butadiene polymer blocks, the amount of the styrene-type elastomer included in the adhesive layers being 35-99 mass% inclusive, the amount of the polyethylene resin included in the adhesive layers being 1-65 mass% inclusive, and the sum of the polyethylene resin and the ethylene components in the styrene-type elastomer being 35-70 mass% of the components of the adhesive layers.

Description

[0001] This application is a divisional application of the application dated April 2, 2013, the application number is 201380019463.6, and the title of the invention is "self-adhesive surface protection film". technical field [0002] This invention relates to adhesive films. The adhesive film of the present invention is suitable for use in the following cases: protection of members such as prism sheets used in optical applications, synthetic resin plates (for example, for building materials), stainless steel plates (for example, for building materials), aluminum plates, film-coated plywood, steel plates , glass plates, home appliances, precision machinery, and the surface of automobile bodies during manufacturing, used to protect objects from scratches during stacking, storage, transportation, and transportation during the manufacturing process, and to protect objects during secondary processing (such as bending, pressing) to avoid scratches. Background technique [0003] A...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J7/24C09J7/30C09J153/02C09J123/06C09J123/08
CPCC08L23/04C08L23/06C08L53/02C09J123/04C09J123/06C09J153/02C09J2423/04C09J2423/106C09J2453/00C09J7/381C09J7/243C09J7/387
Inventor 山本茂知大木祐和多贺敦
Owner TOYOBO CO LTD
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