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Polyvinylidene fluoride resin composition, film, back sheet, and solar cell module

A technology of polyvinylidene fluoride and resin composition, applied in electrical components, circuits, photovoltaic power generation, etc., can solve problems such as film defects and poor dispersion, and achieve the effects of less defects, improved dispersion, and excellent weather resistance

Active Publication Date: 2012-09-12
DENKA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the dispersibility of white pigments such as titanium oxide and inorganic pigments for toning in the above-mentioned conventional white-based PVDF film is poor, and there is a problem that they form aggregates and the film is prone to defects.

Method used

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  • Polyvinylidene fluoride resin composition, film, back sheet, and solar cell module
  • Polyvinylidene fluoride resin composition, film, back sheet, and solar cell module
  • Polyvinylidene fluoride resin composition, film, back sheet, and solar cell module

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Experimental program
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Effect test

no. 1 Embodiment approach ）

[0029] First, a polyvinylidene fluoride-based resin composition (hereinafter also simply referred to as a resin composition) according to a first embodiment of the present invention will be described. The resin composition according to the present embodiment contains at least a white inorganic pigment and an inorganic pigment for color tone in a resin component composed of two types of PVDF and PMMA having different forms.

[0030] [PVDF: total 50~95% by mass in the resin component]

[0031] PVDF is excellent in weather resistance and heat resistance, and is the main component of the resin composition of this embodiment. However, when both of the two types of PVDF to be compounded are PVDFs with an MFR of less than 3 g / 10 min, the dispersion of the white inorganic pigment and the inorganic pigment for toning in PVDF is reduced, and defects are likely to occur when forming a thin film. On the other hand, when two kinds of PVDFs are used as PVDFs with an MFR exceeding 35 g / 10 m...

no. 2 Embodiment approach ）

[0068] Hereinafter, a polyvinylidene fluoride-based resin composition according to a second embodiment of the present invention will be described. The resin composition of the present embodiment is the same as the resin composition of the first embodiment described above except that two types of PVDF having different melt flow properties are blended.

[0069] [PVDF: total 50~95% by mass in the resin component]

[0070] In the resin composition of the present embodiment, two types of PVDF (PVDF1 and PVDF2) having different melt flow characteristics are used. These resins may be in the form of pellets or in the form of powder, and these two forms of resins may be mixed and used. In addition, the melt flow characteristic of each raw material resin component shown below is the value measured according to the measuring method of MFR (Melt Flow Rate) stipulated in the A method of JISK7210 unless otherwise stated.

[0071] One of the two types of PVDF (PVDF1) used was PVDF whose MFR ...

Embodiment 1）

[0081] (1) Preparation of inorganic pigments for toning

[0082] 0.8 kg of black inorganic pigment powder formed from oxide solid solution of chromium, manganese and copper, 1.6 kg of brown pigment powder formed of oxide solid solution of zinc, iron, nickel and aluminum, and blue pigment powder formed of cobalt aluminate 0.6 kg was mixed in a dry mixer to produce an inorganic pigment for coloring. Then, 0.03 kg of n-hexyltrimethoxysilane was added to a mixed solution of 0.3 kg of 0.1 mass % acetic acid aqueous solution and 0.3 kg of ethanol to prepare a silane coupling agent solution. Then, the inorganic pigment for color adjustment is added into the mixer, and the silane coupling agent solution is added dropwise while stirring, and mixed. After mixing, take it out, dry it with a drier, and then crush it into powder. The average particle size (median particle size) of the obtained inorganic pigment for toning was 0.3 μm.

[0083] (2) Resin composition

[0084] As the resin...

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Abstract

Provided is a polyvinylidene fluoride resin composition in which inorganic pigment is well dispersed and which can form a film that suffers from little defect caused by poor dispersion and that has mechanical strengths suitable for practical use. Also provided are a film, a back sheet, and a solar cell module. A resin composition obtained by blending 100 parts by mass of a resin component consisting of 50 to 95% by mass (in total) of two kinds of polyvinylidene fluorides which are different in shape or melt flow characteristics and 5 to 50% by mass of polymethyl methacrylate with both 7 to 40 parts by mass of a white inorganic pigment and 0.01 to 7 parts by mass of an inorganic pigment for color matching, wherein at least one of the polyvinylidene fluorides exhibits an MFR (230 DEG C, 3.8kg load) of 3 to 35g / 10min and the polymethyl methacrylate exhibits an MFR (230 DEG C, 10kg load)of 2 to 20g / 10min.

Description

technical field [0001] The present invention relates to a polyvinylidene fluoride resin composition, a polyvinylidene fluoride resin film, a back sheet for a solar cell module, and a solar cell module. More specifically, it relates to a resin composition for producing a weather-resistant film constituting a back sheet of a solar cell module, and a weather-resistant film formed using the resin composition. Background technique [0002] Polyvinylidene fluoride (hereinafter abbreviated as PVDF.) has excellent mechanical strength and chemical resistance, and is used as a piping material for chemical equipment, as well as a lining material for the inner surface of storage tanks and reaction tanks. In addition, PVDF is also excellent in weather resistance, so it is also used as a film for surface protection of substrates such as plastic sheets and metal sheets for interior and exterior decoration of various buildings and automobiles, and as an insulating material for parts of elec...

Claims

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Application Information

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IPC IPC(8): C08L27/16C08K3/00C08L33/12H01L31/042
CPCC08J5/18C08J2327/16C08L27/16C08L33/12C08L2205/025C08L2205/03C08L2666/72C08K3/013H01L31/049Y02E10/50
Inventor 齐藤智夫小茂田含中岛康次三俣贵史
Owner DENKA CO LTD
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