Laminated film and method for producing same

A composite film and film technology, applied in the field of composite film, can solve the problems of undisclosed network structure, cracks or holes, etc., and achieve the effect of low dielectric properties

Inactive Publication Date: 2006-02-15
TORAY IND INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is no disclosure of network structure, cracks or voids as described later

Method used

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  • Laminated film and method for producing same
  • Laminated film and method for producing same
  • Laminated film and method for producing same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0276] (Synthesis of PET)

[0277] Calcium acetate was added as a transesterification catalyst to a mixture of 100 parts by weight of dimethyl terephthalate and 60 parts by weight of ethylene glycol at 140°C, heated to 230°C, and methanol was distilled off to perform transesterification. Then, antimony trioxide as a polymerization catalyst and phosphoric acid as a heat stabilizer were added to the product of this transesterification reaction, and it transferred to the polycondensation reaction tank. Next, slowly reduce the pressure in the reaction system to 0.1kPa while heating from 230°C to 290°C, stir the interior at 290°C under reduced pressure, and polymerize while distilling off methanol. The synthetic intrinsic viscosity is 0.62, and the glass transition temperature Polyethylene terephthalate (PET) with a melting point of 78°C and a melting point of 255°C, basically without adding particles (also known as particle-free PET).

[0278] (Manufacture of resin composition B)...

Embodiment 2

[0293] A composite film was produced in the same manner as in Example 1 except that the thickness ratio of B / A / B in the composite film thickness of 50 μm was changed to 12.5 / 25 / 12.5.

Embodiment 3

[0295] In the production of the resin composition A, a liquid crystalline polyester having the following composition, a melting point of 265° C., and a molecular weight of 18,000 (called LCP2) was used as a liquid crystalline polymer.

[0296] (Copolymerization composition of LCP2)

[0297] p-Hydroxybenzoic acid 56.8 mol%

[0298] 4,4′-Dihydroxybiphenyl v 5.9 mol%

[0299] Ethylene glycol 15.7 mol%

[0300] Terephthalic acid 21.6 mol%

[0301] In addition, the weight ratio of PET / LCP2 in the resin composition A was changed to 30 / 70. The elongation at which non-ductility was judged was 15%.

[0302] Except for these, it carried out similarly to Example 1, and produced the composite film.

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Abstract

A laminated film which is excellent in thermal dimensional stability, cushion properties and low dielectric characteristics is disclosed. The laminated film comprises at least two layers among which at least one layer is a biaxially oriented film composed of a thermoplastic resin composition and at least one other layer is a film having a network structure.

Description

technical field [0001] The present invention relates to a composite film, for example, applicable to various industrial materials such as circuit boards, magnetic recording media, engineering paper / release materials, plate-making printing materials, optical / display materials, molding materials, construction, and electrical insulation materials. composite film. Background technique [0002] Films are used in various industrial materials such as magnetic recording media, circuit materials, plate making / printing materials, engineering / release materials, printing materials, molding materials, electrical insulation materials, agricultural use, packaging, building materials, etc. It has been used in various fields where there is a large demand. [0003] However, in recent years, higher performance of thin films has been desired for various applications. [0004] In recent years, the demand for flexible printed circuit boards (FPCs) has been rapidly increasing along with technolo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B5/18B32B27/08
Inventor 东大路卓司恒川哲也町田哲也中森由佳里
Owner TORAY IND INC
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