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Release film

A technology of release film and mold layer, which is applied in the direction of film/sheet release liner, film/sheet without carrier, film/sheet adhesive, etc., which can solve the problem of contamination of bonding process and deterioration of transferability , Contamination of adhesives and other issues, to achieve the effect of low transferability, good mold release and high value

Active Publication Date: 2019-12-24
MITSUBISHI CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in recent years, especially when attention is paid to the level difference absorbability of the adhesive layer and a softer type is used for the adhesive layer itself, even if the release film described above is used, it may not always be satisfactory. level
In addition, in the above method, since the silicone resin containing the transfer component is added, the transferability is deteriorated, and the transfer component transfers to the adhesive side when bonding with the adhesive, and there is a possibility of contaminating the adhesive and contaminating the bonding process. Technical issues such as process

Method used

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Experimental program
Comparison scheme
Effect test

no. 1 approach ＞

[0022] The polyester film in the present invention refers to a film obtained by stretching a sheet melt-extruded from an extrusion port by a so-called extrusion method.

[0023] The polyester constituting the above-mentioned film refers to a polymer containing an ester bond obtained by polycondensation of dicarboxylic acid and diol or hydroxycarboxylic acid. Examples of the dicarboxylic acid include terephthalic acid, isophthalic acid, adipic acid, azelaic acid, sebacic acid, 2,6-naphthalene dicarboxylic acid, 1,4-cyclohexanedicarboxylic acid, and the like; Examples of diols include ethylene glycol, 1,4-butanediol, diethylene glycol, triethylene glycol, pentaerythiol, 1,4-cyclohexanedimethanol, polyethylene glycol, Diol and the like; As the hydroxycarboxylic acid, p-hydroxybenzoic acid, 6-hydroxy-2-naphthoic acid and the like can be exemplified. Typical examples of such polymers include polyethylene terephthalate, polyethylene 2,6-naphthalate, and the like.

[0024] The film...

no. 2 approach ＞

[0090] In the present invention, the polyester film constituting the two types of release films (hereinafter, the one with the smaller release force may be referred to as the first release film, and the one with the larger release force may be referred to as the second release film) may be a single The layer structure may be a laminated structure, for example, in addition to the 2-layer or 3-layer structure, it may also be a multilayer of 4 or more layers within the limit not exceeding the gist of the present invention, and is not particularly limited.

[0091] The polyester used for the polyester film in the present invention may be homopolyester or copolyester. When composed of a homopolyester, a polyester obtained by polycondensation of an aromatic dicarboxylic acid and an aliphatic diol is preferable.

[0092] Examples of aromatic dicarboxylic acids include terephthalic acid and 2,6-naphthalene dicarboxylic acid, and examples of aliphatic diols include ethylene glycol, die...

Embodiment 1－1

[0298]

[0299] The above-mentioned polyester (1) was supplied as a raw material to an extruder with a vent, and after being melt-extruded at 290°C, it was solidified by cooling on a cooling roll whose surface temperature was set at 40°C by electrostatic application encryption. , an amorphous film with a thickness of about 550 μm was obtained.

[0300] This film was stretched 3.7 times in the longitudinal direction at 85° C., stretched 3.9 times in the transverse direction at 100° C., and heat-treated at 210° C. to obtain a biaxially stretched polyester film with a thickness of 38 μm.

[0301] On the obtained polyester film, a release agent including the release agent composition-A shown below was applied in an amount (after drying) of 0.12 g / m 2 The coating method was carried out by reverse gravure coating, and a roll-shaped release polyester film was obtained under the conditions of a dryer temperature of 150°C and a line speed of 30 m / min.

[0302]

[0303] a1: the cur...

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Abstract

To provide a release film which has good releasability from adhesives, very little oligomer precipitation, and little transferability, and is suitable not only for the manufacture of electrostatic capacitance type touch panels, etc., but also for liquid crystal displays (LCDs). In addition to the polarizing plate, retardation plate and other components used in the manufacture of LCD components, plasma display panel components, and organic electroluminescence components, it is also suitable for various display components. Adhesive layer protection purposes. The release film is characterized by having, on one surface of a polyester film, a silicone-based release layer formed of a coating liquid containing a functional group-containing reactive silicone resin, an unreactive silicone resin, and platinum system catalyst.

Description

technical field [0001] The present invention relates to a release film that is particularly suitable for applications that require light peeling in various adhesive protection applications. The amount of oligomer precipitation is extremely small. Various applications for lamination of agent layers, manufacture of LCD components such as polarizing plates and retardation plates used in liquid crystal displays (hereinafter, abbreviated as LCD), components of plasma display panels (hereinafter, abbreviated as PDP) In addition to manufacturing various display components such as organic electroluminescent (hereinafter, abbreviated as organic EL) component manufacturing, it is also suitable for various adhesive layer protection applications. Background technique [0002] Conventionally, release films based on polyester films have been used in various applications such as capacitive touch panel manufacturing, lamination through an adhesive layer, polarizing plates for LCDs, retardat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J7/04C09J7/40C08J7/043C08J7/044C08J7/046C09J7/10
CPCB32B27/00C09J7/401C09J2483/005C09J2467/006C09J2203/318C09J7/10C09J2301/312C08J7/043C08J7/046C08J7/044C09J7/255C09J11/06C08J7/042C08J5/18C08J2367/00C08J2483/06
Inventor 铃木太朗
Owner MITSUBISHI CHEM CORP
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