Laminated film and adhesive tape

A technology of laminated film and adhesive tape, which is applied in the direction of film/sheet adhesives, adhesives, adhesive products, etc., and can solve the problems of difficult prism sheet appearance inspection and other problems

Inactive Publication Date: 2011-02-02
NITTO DENKO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this way, when the appearance of the prism sheet with the surface protection film is undulated (indentation), it is difficult to carry out the appearance inspection of the prism sheet in the state where the surface protection film is pasted.

Method used

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  • Laminated film and adhesive tape
  • Laminated film and adhesive tape
  • Laminated film and adhesive tape

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0184] The following compounds were prepared as the roughness expressing layer forming material, the fine unevenness eliminating layer forming material, the substrate layer forming material and the smooth layer forming material.

[0185] Rough surface layer forming material: 75 parts of リアクタ-TPO (manufactured by SunAllomer Co., Ltd.: キヤタロイ Q300F; melt flow rate (MFR) = 0.8 (230° C., 2.16 kgf)) and polypropylene obtained using a metallocene catalyst (Japanese polypropylene Co., Ltd.: Wintec WFX4; Melt flow rate (MFR) = 7.0 (230°C, 2.16kgf)) mixture of 25 parts

[0186] Forming material of fine unevenness eliminating layer: low-density polyethylene (manufactured by Nippon Polyethylene Co., Ltd.: ノバテック LD LC720; melt flow rate (MFR) = 9.4 (190° C., 2.16 kgf))

[0187] Substrate layer forming material: Block polypropylene (manufactured by SunAllomer: PF380A)

[0188] Smooth layer forming material: low-density polyethylene (manufactured by Nippon Polyethylene Co., Ltd.: Nobatec LD...

Embodiment 2

[0191] A laminated film (2) was obtained in the same manner as in Example 1 except that the thickness of the rough surface layer was set to 5 μm. The thickness of the fine unevenness eliminating layer was 2 μm, the thickness of the rough surface layer was 5 μm, the thickness of the substrate layer was 38 μm, and the thickness of the smooth layer was 7 μm. Table 1 shows the evaluation results of the obtained laminated film (2).

Embodiment 3

[0193] A laminated film (3) was obtained in the same manner as in Example 1 except that the thickness of the rough surface layer was set to 10 μm. The fine unevenness eliminating layer had a thickness of 2 μm, the rough surface layer had a thickness of 10 μm, the substrate layer had a thickness of 38 μm, and the smooth layer had a thickness of 7 μm. Table 1 shows the evaluation results of the obtained laminated film (3).

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Abstract

Provided are a laminated film and an adhesive tape. The laminated film of the present invention includes a base material layer, a roughness-expressing layer, and a fine unevenness-erasing layer in the stated order, in which: the base material layer contains a thermoplastic resin; the roughness-expressing layer contains at least one kind of a resin component (A) selected from polyethylenes, ethylene-vinyl acetate copolymers, propylene-based polymers, and olefin-based thermoplastic elastomers; the fine unevenness-erasing layer contains a thermoplastic resin (B); an arithmetic average surface roughness Ra on the surface on the side of the fine unevenness-erasing layer is 1.0 [mu]m to 3.0 [mu]m; and the haze value of the laminated film is 30% or less.

Description

technical field [0001] This invention relates to laminated films and adhesive tapes. More specifically, it relates to a laminated film and an adhesive tape in which the haze value and surface roughness are adjusted without changing the overall mechanical properties of the laminated film or adhesive tape. Also, the present invention relates to an uneven surface capable of effectively protecting a member having unevenness on the surface. Background technique [0002] In general, films and adhesive tapes are adjusted to a haze value and surface roughness suitable for their purpose (eg, appearance adjustment). As a method of adjusting the haze value and surface roughness, there is known a T-die extrusion touch roll forming method in which molten resin extruded from a T-die comes into contact with a metal roll having a concave-convex pattern to convert the concave-convex pattern A method of printing onto a resin surface (film surface) (for example, JP-A-2003-181962 and JP-A-200...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B27/08C09J7/02C09J7/29
CPCC09J2201/162C09J2423/006C09J7/0296B32B27/32B32B25/042B32B25/08B32B27/08B32B27/20B32B27/304B32B27/306B32B27/308B32B27/36B32B27/365B32B27/40B32B2250/24B32B2270/00B32B2274/00B32B2307/40B32B2307/412B32B2307/538B32B2307/748B32B2405/00C09J7/29Y10T428/24355C09J2301/162
Inventor 生岛伸祐林直人大山高辉林圭治内田翔武田公平花木一康
Owner NITTO DENKO CORP
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