Polyvinylidene fluoride resin film, multilayer film, backsheet for solar cell module, and film manufacturing process

A technology of vinyl difluoride and its manufacturing method, which can be applied in the direction of chemical instruments and methods, synthetic resin layered products, circuits, etc., and can solve the problems of aesthetic damage, reduction of sunlight reflection efficiency, peeling strength of PVDF film and PET film, and durability of bonding sexual insufficiency
CN103582671AInactive Publication Date: 2014-02-12KUREHA KAGAKU KOGYO KK
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
KUREHA KAGAKU KOGYO KK
Publication Date
2014-02-12
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention provides a polyvinylidene fluoride resin (PVDF) film which has a crystal structure such that the [Beta]-crystal content is 10% or more relative to the sum total of [Alpha]-crystal and [Beta]-crystal as calculated from the absorbances observed in the infrared absorption spectrum and which preferably exhibits either a tensile modulus in TD of 90MPa or less at 120 DEG C or a ratio of (tensile modulus in TD at 100 DEG C) / (tensile modulus in TD at 23 DEG C) of 4% or less and is particularly preferably produced by extrusion molding; a multilayer film; a backsheet for a solar cell module, being provided with the film; and a film manufacturing process which comprises subjecting a sheet-shaped PVDF material obtained by melt extrusion to rapid cooling at 5 to 70 DEG C and, preferably, then heat treatment.
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Description

technical field

[0001] The present invention relates to a polyvinylidene fluoride resin film, and more specifically, to a polyvinylidene fluoride resin film that does not cause heat wrinkles and is excellent in lamination suitability, and the polyvinylidene fluoride film. A method for producing a vinyl fluoride resin film. Furthermore, the present invention relates to a multilayer film having the polyvinylidene fluoride resin film and a backsheet for a solar cell module having the polyvinylidene fluoride resin film. Background technique

[0002] Polyvinylidene fluoride resin (hereinafter also referred to as "PVDF"), exerts its excellent weather resistance, heat resistance, pollution resistance, chemical resistance, solvent resistance, mechanical properties, It is widely used in fields requiring long-term durability. In particular, the film formed by PVDF has a cost advantage by being thinner, and is used as a protective material for various surfaces, such as parts for inte...

Claims

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