Adhesive film

A technology of adhesive film and adhesive layer, which is applied in the direction of adhesives, film/sheet adhesives, adhesive products, etc., can solve the problems of adhesive residue, increased adhesive force, and difficult peeling, etc., to achieve adhesion Small increase in resultant force, small change in adhesive force, and excellent transparency

Inactive Publication Date: 2014-06-18
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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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0082] The following examples are given to further illustrate the present invention. However, the present invention is not limited to the following Examples unless it deviates from the gist. In addition, the evaluation method of the physical property in the following Example and a comparative example is as follows.

[0083] (1) Crystal fusion heat and crystallization heat

[0084] Weigh about 5 mg of polyolefin resin, use a differential scanning calorimeter (DSC-60) manufactured by Shimadzu Corporation, raise the temperature to 200°C at a heating rate of 10°C / min, and keep it at 200°C for 5 minutes. After cooling down to 0°C at a cooling rate of 10°C / min, and then raising the temperature to 200°C at a rate of 10°C / min, the heat of fusion and heat of crystallization can be obtained from the graph.

[0085] (2) Elastic modulus of the resin

[0086] According to the test method of JIS K7162, it measured under the following conditions.

[0087] Test piece: Type 1A

[0088] Be...

reference example 1

[0127] (Preparation of substrate layer)

[0128] 100 wt% of a homopolypropylene polymer (manufactured by Sumitomo Chemical: FLX80E4, tensile modulus: 1500 MPa) was melt-extruded with a 60 mmφ single-screw extruder (L / D: 22.4) to prepare a base layer.

[0129] (Preparation of adhesive layer)

[0130] 98wt% olefin-based elastomer (manufactured by Mitsubishi Chemical: Zealous MC707) and 2wt% heat stabilizer masterbatch (MB) containing 50000ppm Irganox1076 were melt-extruded with a 45mmφ twin-screw extruder (L / D: 19). became the adhesive layer.

[0131] (production of release layer)

[0132] Melt extrusion of 50wt% propylene-ethylene block copolymer (POLYPRO BC3HF Japan) and 50wt% propylene-ethylene random copolymer (manufactured by Sumitomo Chemical: WF836DG3) with a 65mmφ single-screw extruder (L / D: 25), A release layer was made.

[0133] (film production)

[0134] In the state where the base material layer, adhesive layer, and release layer are melted by each extruder, a 3...

reference example 2

[0137] In addition to making the resin of the base 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 Reference 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.

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Abstract

Provided is an adhesive film whereby there is little blocking between adhesive films; 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 µm and 0.200 µm inclusive, the average surface roughness (SRa) of the adhesive layer is no greater than 0.030 µm, 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 Patents(China)
IPC IPC(8): C09J7/02B32B27/00B32B27/32C09J123/12C09J123/16
CPCC09J7/0232C09J2423/16B32B27/32C09J2423/106B32B7/12B32B7/06B32B25/08B32B25/14B32B27/08B32B2307/412B32B2307/50B32B2307/538B32B2405/00C09J7/403B32B27/00B32B27/327C09J7/243C09J7/385C09J7/40C09J123/12C09J2301/312C09J2301/40
Inventor 江崎浩明大野真一井川孝志
Owner TOYOBO CO LTD
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