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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

Inactive Publication Date: 2014-02-12
KUREHA KAGAKU KOGYO KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the PVDF film is thermally wrinkled, not only the appearance of the exposed back sheet is damaged, but also there are problems such as insufficient peel strength and joint durability between the PVDF film and the PET film, and a decrease in the reflection efficiency of sunlight, which needs to be improved.

Method used

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

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manufacture example

[0086] The present invention is characterized in that the PVDF film has a PVDF film in which the proportion of β-type crystals is 10% or more when the crystal structure obtained from the absorbance of infrared absorption spectrum is 100% of the total of α-type crystals and β-type crystals, It can be manufactured by strictly controlling the manufacturing conditions using a known PVDF membrane manufacturing method. Production can be carried out by, for example, dissolving or dispersing a raw material mixture (hereinafter also simply referred to as "PVDF") as a composition containing PVDF in an organic solvent, coating it on a substrate, and then using The casting method of solvent volatilization and removal; the method of vacuum evaporation PVDF powder on the substrate; the method of melting and kneading PVDF at a temperature above the melting point, and then rolling between rolls to form a film; PVDF at the melting point Melting and kneading at the above temperature, and then e...

Embodiment 1

[0130] Supply PVDF [Co., Ltd. Kureha KF (registered trademark) # 850], 100 parts by mass to the twin-screw extruder, and supply titanium oxide [TI-PURE (registered trademark) R101 manufactured by Dupon Corporation; rutile type titanium oxide, Average particle size: 0.29 μm, surface-treated product] 55.6 parts by mass, PMMA [Del Pounder (registered trademark) 70H manufactured by Asahi Kasei Chemicals Co., Ltd.] 23.4 parts by mass, acrylic elastomer [Pararoid (registered trademark) EXL manufactured by Rom & Haers Co., Ltd.] 2315] 2.5 parts by mass, calcium carbonate [SL2500 manufactured by Takehara Chemical Industry Co., Ltd.] 2.8 parts by mass, calcium stearate [manufactured by Nitto Kasei Co., Ltd.] 0.9 parts by mass, and carbon black [denka black produced by Denki Kagaku Kogyo Co., Ltd. ( Registered trademark)] 0.04 parts by mass, melted and kneaded at a temperature of 220° C., melted and extruded from the die in the form of strands, and cut after cooling to obtain pellets for...

Embodiment 2

[0133] Except having changed the surface temperature of the 1st casting roll into 50 degreeC, it carried out similarly to Example 1, and obtained the PVDF film of thickness 20 micrometers. Table 1 shows the measurement results of the ratio of β-type crystals and mechanical properties of the obtained PVDF film, and the results of thermal wrinkle evaluation during lamination bonding.

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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.

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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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L27/16C08K3/22B32B27/30H01L31/048B29C48/08
CPCH01L31/18B32B27/30C08L27/16C08K3/22Y02E10/50H01L31/0487B29D7/01C08J5/18C08J2327/16B29K2027/16H01L31/049B32B27/304B32B27/08B32B27/20B32B27/32B32B27/34B32B27/36B32B3/08B32B2264/102B32B2307/306B32B2307/54B32B2307/71B32B2307/712B32B2307/714B32B2457/12C08K2003/2241C08L33/06C08L33/12C08L2205/025C08L2205/03B29C48/022B29C48/08B29C48/0018B29C48/914B29C48/918B29C48/9185H01L31/042
Inventor 细田友则佐藤祐辅大场弘行赤津正道小松崎哲也
Owner KUREHA KAGAKU KOGYO KK
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