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Adhesive film

An adhesive film and adhesive layer technology, applied in the direction of adhesives, film/sheet adhesives, adhesive products, etc. Small increase in resultant force, small change in adhesive force, and excellent processing suitability

Inactive Publication Date: 2012-07-18
TOYOBO CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above-mentioned adhesive film has the following problems: it is easily affected by the environment in which the bonded body is placed, especially in a high-temperature environment, extreme time-dependent changes occur, so the adhesive force increases and it becomes difficult to peel off from the adherend. , adhesive residue, etc.
[0006] However, these membranes also fall short in terms of performance

Method used

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  • Adhesive film
  • Adhesive film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0130] (Preparation of substrate layer)

[0131] 100 wt% of a homopolypropylene polymer (manufactured by Sumitomo Chemical Co., Ltd.: FLX80E4, tensile modulus: 1500 MPa) was melt-extruded with a 60 mmφ single-screw extruder (L / D: 22.4) to prepare a base layer.

[0132] (Preparation of adhesive layer)

[0133] Olefin-based elastomer (manufactured by Mitsubishi Chemical: Zealous MC707) 98wt%, heat stabilizer masterbatch (MB) 2wt% containing 50000ppm Irganox1076 were melt-extruded with a 45mmφ twin-screw extruder (L / D: 19) to produce became the adhesive layer.

[0134] (production of release layer)

[0135] 50 wt% of propylene-ethylene block copolymer (POLYPRO BC3HF in Japan) and 50 wt% of propylene-ethylene random copolymer (manufactured by Sumitomo Chemical: WF836DG3) were melt-extruded with a 65mmφ single-screw extruder (L / D: 25), A release layer was made.

[0136] (film production)

[0137] In the state where the base material layer, the adhesive layer, and the release l...

Embodiment 2

[0140] In addition to making the resin of the substrate layer propylene-1-butene copolymer (manufactured by Sumitomo Chemical: SPX78J1, tensile modulus: 530MPa) 50wt% and a homopolypropylene polymer (manufactured by Sumitomo Chemical: FLX80E4, tensile modulus : 1500 MPa) Except for 50 wt%, a film was produced in the same manner as in Example 1. The film also forms a smooth adhesive layer, has adhesiveness at room temperature, does not have uneven contact between the adherend and the adhesive layer, and has a small increase in the adhesive force after sticking to the adherend. Excellent, no blocking between the release layer and the adhesive layer, and a film with good handling properties.

Embodiment 3

[0142] The production of the base material layer and the release layer was the same as in Example 1. The adhesive layer and film were fabricated as follows. The film also forms a smooth adhesive layer, has adhesiveness at room temperature, does not have uneven contact between the adherend and the adhesive layer, and has a small increase in the adhesive force after sticking to the adherend. Excellent, no blocking between the release layer and the adhesive layer, and a film with good handling properties.

[0143] (adhesive layer)

[0144] Amorphous PP (manufactured by Sumitomo Chemical: Tafcelene H3522A, heat of crystallization fusion and heat of crystallization: 28 J / g) and homopolypropylene resin (manufactured by Sumitomo Chemical: FLX80E4, tensile modulus: 1500 MPa) were mixed at 50 / 50 wt % The ratio is mixed, and the product is melt-extruded with a 45mmφ twin-screw extruder (L / D: 19) to make an adhesive layer.

[0145] (film production)

[0146]In the state where the bas...

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Abstract

Provided is an adhesive film in particular, there is little blocking even after the adhesive film has been stored rolled up. The provided adhesive film is also excellently suited to processing; is not prone to bubbling after being stuck to a target object, even if treated at a high temperature; and is highly transparent. Furthermore, there is little change in the adhesiveness of the provided adhesive film, and the external appearance of the target object is maintained. The provided adhesive film is a polypropylene resin film comprising a layered body wherein an adhesive layer is laminated to one surface of a base layer comprising a polypropylene resin and a release layer is laminated to the other surface of the base layer.; The average surface roughness (SRa) of the release layer is between 0.050 [mu]m and 0.200 [mu]m inclusive, the average surface roughness (SRa) of the adhesive layer is no greater than 0.030 [mu]m, the contact surface area with a target object defined in the specification is between 90% and 100% inclusive, and the bleed amounts of a polymer component and an antioxidant are within a specified range.

Description

technical field [0001] The present invention relates to adhesive films. The adhesive film of the present invention is used to protect the surface of the article from adverse effects such as dust adhesion and damage by sticking it on the surface of articles such as synthetic resin boards, decorative boards, metal plates, and painted steel sheets. The surface protection film can also be used particularly preferably as a surface protection film at the time of solder dipping of a printed circuit board. The term "adhesive film" in the present invention also means an adhesive sheet or an adhesive tape. Background technique [0002] So far, adhesive films for the purpose of protecting the surface of the covered body have been used in the processing, storage, and transportation of building materials, electrical and electronic products, and automobiles. Such adhesive films must have good adhesion and be used It can be easily peeled off without contaminating the surfaces with adhesi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J7/02B32B27/00B32B27/32C09J123/12C09J123/16
CPCB32B7/12B32B27/32C09J2423/16C09J2423/106C09J7/0232B32B7/06B32B25/08B32B25/14B32B27/08B32B2307/412B32B2307/50B32B2307/538B32B2405/00C09J7/403B32B27/00B32B27/327C09J7/243C09J7/385C09J7/40C09J123/12C09J2301/312C09J2301/40
Inventor 江崎浩明大野真一井川孝志
Owner TOYOBO CO LTD
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