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surface protection film

A technology of surface protection film and back layer, applied in the direction of film/sheet adhesive, synthetic resin layered product, adhesive type, etc., can solve surface protection film deformation, air accumulation, back layer and adhesion The layer is not easy to slide and other problems, so as to achieve the effect of maintaining beautiful appearance and low haze

Inactive Publication Date: 2019-05-21
TORAY ADVANCED FILM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the centerline average roughness (Ra) of the surface roughness of the back layer is about 0.05 μm. Therefore, the back layer and the adhesive layer of the surface protection film are not easy to slip, and it is easy to roll the surface protection film into a product roll. Air pockets may cause defects such as deformation of the surface protection film and wrinkles when it is attached to the resin board

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0065] will contain 87% by weight of a density of 0.924g / cm 3 , MFR (melt flow rate, Melt FlowRate) at 190 ℃ is 4.5g / 10 minutes high-pressure process low-density polyethylene, and 13% by weight of the mixed composition masterbatch (which contains 88% by weight of the low-density polyethylene ethylene, 6% by weight of silicon dioxide with an average particle diameter of 11 μm, and 6% by weight of fluorine-containing compounds with polyfluorocarbon groups and polyoxyethylene groups) as the back layer, and the density is 0.924g / cm 3 , High-pressure low-density polyethylene with an MFR of 7.5g / 10min at 190°C is used as the middle layer, and the density is 0.922g / cm 3 , The linear low-density polyethylene of ethylene-hexene copolymer with a melting point of 121°C is used as the adhesive layer, and the thickness ratio of the back layer is 8%, and the thickness of the middle layer is 72%, using a T-model composite film maker. Co-extrusion was carried out so that the thickness ratio ...

Embodiment 2

[0068] As the back layer, 87% by weight of a density of 0.900 g / cm was used 3 , a propylene·ethylene·butylene random copolymer (EPBC) with a melting point of 148° C., and 13% by weight of a mixed composition masterbatch (which contains 88% by weight of the aforementioned EPBC, 6% by weight of EPBC with an average particle diameter of 11 μm A surface protection film was prepared in the same manner as in Example 1 except that silica and 6% by weight of the same fluorine-containing compound having a polyfluorocarbon group and a polyoxyethylene group as in Example 1 were used.

Embodiment 3

[0070] As an adhesive layer, a linear low-density polyethylene containing 87% by weight of a density of 0.920 g / cm3, 3% by weight of a terpene resin as a tackifier, and 10% by weight of a density of 0.924 g / cm 3 A resin composition for forming an adhesive layer of high-pressure low-density polyethylene, used as an intermediate layer, with a density of 0.930 g / cm 3 Except for the linear low density polyethylene, it carried out similarly to Example 1, and produced the surface protection film.

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Abstract

A surface protection film, characterized in that the surface protection film is a surface protection film comprising an adhesive layer, an intermediate layer, and a back layer, wherein the back layer comprises a poly An olefin resin composition, the resin constituting the intermediate layer is mainly made of low-density polyethylene, and the haze of the surface protection film after heating at 160°C for more than 1 minute and slowly cooling is 10% or less, and at 200°C The haze after heating for 1 minute or more and gradually cooling is 5% or less. The present invention provides a surface protection film that is easy to be thermoformed even in a state of being bonded to an adherend, and is excellent in transparency and gloss after thermoforming of the adherend.

Description

technical field [0001] The present invention relates to a surface protection film, and particularly relates to a surface protection film having excellent transparency even after thermoforming in a state bonded to a resin plate. Background technique [0002] For resin plates, metal plates, etc. (hereinafter sometimes referred to as adherends), in order to prevent damage to the surface, the surface protection film is usually carried and transported. Therefore, the requirements for the surface protection film and the adherend Compatible adhesive properties. In addition, resin boards are often exposed to secondary processing such as printing and thermoforming in the state where the surface protection film is bonded, and adaptability to thermoforming is required. [0003] Applications of the above-mentioned polycarbonate, polymethyl methacrylate, and other resin sheets involved in thermoforming relate to various aspects such as nameplates, bathtubs, helmets, and outer packaging ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J7/29C09J7/30B32B27/00B32B27/18B32B27/32C09J123/06C09J131/04C09J201/00C09J7/20
CPCB32B27/00B32B27/18B32B27/32C09J123/06C09J131/04C09J201/00C09J7/20B32B7/12B32B7/02
Inventor 井上则英米田贵洋德丸美之
Owner TORAY ADVANCED FILM CO LTD