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Method for making adhesive film

A manufacturing method and technology for bonding films, which are applied in the direction of film/sheet-like adhesives, adhesives, etc., can solve the problems of reduced workability, inability to stabilize co-extrusion molding, and inability to increase the mixing ratio of tackifying resin, etc. Stable quality and good forming workability

Inactive Publication Date: 2013-08-21
NITTO DENKO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in such a method, when a surface protection film with high adhesive force is produced according to the type and use of the adherend, even if it is necessary to increase the amount of tackifying resin added to the adhesive layer, due to the use of EVA As the matrix resin of the masterbatch, the proportion of the tackifying resin in the masterbatch cannot be increased
In such a method, for example, when the compounding ratio of the tackifying resin is 15% by weight or more, the particles are blocked, the workability is reduced, and stable coextrusion molding becomes impossible.

Method used

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  • Method for making adhesive film

Examples

Experimental program
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Effect test

Embodiment 1

[0059]As the thermoplastic resin in the substrate layer forming material, low-density polyethylene (manufactured by Nippon Polyethylene Co., Ltd., NOVATEC LD LF547) was used, and as the polyolefin resin in the adhesive layer forming material, polypropylene (Japan POLYCHEM ( Co., Ltd., product name "NOVATEC PPFX3", melting temperature 139°C, MFR8.0 (according to JIS-K6921-2)), as the thermoplastic elastomer in the adhesive layer forming material, styrene-butadiene- Hydrogenated styrene block copolymer (SEBS, manufactured by Shell Chemical Co., Ltd., trade name "KRATON G1657"), as the tackifier resin in the adhesive layer forming material, hydrogenated terpene-based resin (manufactured by Yasuhara Chemical Co., Ltd., trade name "Clearon P125").

[0060] First, the polyolefin-based resin and the hydrogenated terpene-based resin were melt-mixed in accordance with the compounding ratio shown in Table 1 to prepare pre-kneaded pellets. Then, the pre-kneaded granules and SEBS were dr...

Embodiment 2

[0062] As the thermoplastic elastomer in the adhesive layer forming material, a hydrogenated product of styrene-isoprene-styrene block copolymer (SEPS, manufactured by Kuraray Co., Ltd., trade name "Septon 2043") was used instead of SEBS, according to the table In addition, polypropylene and hydrogenated terpene-based resin were melt-mixed at the compounding ratio shown in Table 1 to prepare pre-kneaded pellets, and the pre-kneaded pellets and SEPS were dry-blended at the compounding ratio shown in Table 1. Example 1 was carried out similarly, and the adhesive film (2) which has a base material layer (thickness 100 micrometers) and an adhesive layer (thickness 15 micrometers) was manufactured.

Embodiment 3

[0064] As the polyolefin-based resin in the adhesive layer forming material, low-density polyethylene (melting temperature 110°C, MFR2.0 (according to JIS-K6922-2)) is used instead of polypropylene, and as the thermoplastic elastic in the adhesive layer forming material body, using hydrogenated styrene-isoprene-styrene block copolymer (SEPS, manufactured by Kuraray Corporation, trade name "Septon 2043") instead of SEBS as the tackifier resin in the adhesive layer forming material, Using hydrogenated aromatic petroleum resin (manufactured by Arakawa Chemical Industry Co., Ltd., trade name "ARCON P-125") instead of hydrogenated terpene resin, low-density polyethylene and hydrogenated aromatic Petroleum resin was melt-mixed to make pre-kneaded granules, and the pre-kneaded granules and SEPS were dry-blended according to the compounding ratio shown in Table 1. Except this, it was carried out in the same manner as in Example 1, and a product with a base material layer ( Adhesive fi...

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Abstract

The invention provides a method for making an adhesive film having a substrate layer and an adhesive layer through co-extruding a substrate layer forming material and an adhesive layer forming material containing a thermoplastic elastomer and a tackifying resin. The method allows the adhesive film having a good making shaping operability and a stable quality to be made when the content of the tackifying resin in the adhesive layer is high. The invention also provides the adhesive film obtained through the making method. The invention further provides a master batch for the formation of the adhesive layer of the adhesive film used in the making method. The adhesive film having the substrate layer and the adhesive layer through co-extruding the substrate layer forming material including a thermoplastic resin as a main component and the adhesive layer forming material containing the thermoplastic elastomer and the tackifying resin through the adhesive film making method, the adhesive layer forming material contains a polyolefin series resin having a melting temperature (Tm) of 100-180DEG C solved through a differential scanning calorimetry (DSC), and the content proportion of the tackifying resin in the adhesive layer is below 40wt%.

Description

technical field [0001] The present invention relates to a method for producing an adhesive film. Specifically, the present invention relates to a method for producing an adhesive film having good molding workability and stable quality by a coextrusion method. Moreover, this invention relates to the adhesive film obtained by the manufacturing method of this invention. Furthermore, this invention relates to the masterbatch for adhesive layer formation of the adhesive film used by the manufacturing method of this invention. The adhesive film is also used as an adhesive tape, an adhesive sheet, and the like. The adhesive film of the present invention can be attached to, for example, metal plates, painted metal plates, aluminum alloy frames, resin plates, decorative steel plates, vinyl chloride laminated steel plates, glass plates, etc. during transportation, processing, aging, etc. It is used for the purpose of attaching to the surface of these parts for protection, etc. Back...

Claims

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Application Information

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IPC IPC(8): C09J7/02C09J123/00
Inventor 武田公平生岛伸祐山户二郎
Owner NITTO DENKO CORP
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