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High-strength and high-toughness PVDF solar backplane film material and preparation method thereof

A solar backplane film and high toughness technology, applied in the field of solar backplane film materials, can solve the problems of insufficient strength and toughness, low light transmittance, etc., achieve low light transmittance, improve reflectivity, and improve processing thermal stability Effect

Active Publication Date: 2019-12-27
SHANDONG HUAXIA SHENZHOU NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of the deficiencies in the prior art, the purpose of the present invention is to provide a high-strength and high-toughness PVDF solar backplane film material, improve the strength and toughness of the PVDF backplane film masterbatch, solve the problem of insufficient strength and toughness in the prior art, stretch High strength and elongation at break, low light transmittance, and improved sunlight reflectivity; the invention also provides its preparation method

Method used

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  • High-strength and high-toughness PVDF solar backplane film material and preparation method thereof
  • High-strength and high-toughness PVDF solar backplane film material and preparation method thereof
  • High-strength and high-toughness PVDF solar backplane film material and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0040] Mix 0.5 parts of silane coupling agent, 10 parts of titanium dioxide and 5 parts of calcium sulfate whiskers in a high-speed mixer for 15 minutes at a mixing temperature of 60°C and a mixer speed of 800 r / min to obtain coupling agent pretreated titanium dioxide and calcium sulfate Whiskers; 60 parts of PVDF, 25 parts of PMMA, the obtained pretreated titanium dioxide and titanium dioxide whiskers, 1 part of octadecyl erucamide, 1.5 parts of antioxidant (1010:168=1:0.5) were mixed at high speed Mix in the machine for 10 minutes, the mixing temperature is 50°C, and the speed of the mixer is 1200r / nim. The obtained mixture is melted and processed on the twin-screw extruder at a temperature of 200°C. The temperature is 200°C and the thickness of the film is 25 μm.

Embodiment 2

[0042]Mix 1 part of silane coupling agent, 5 parts of titanium dioxide and 10 parts of titanium dioxide whiskers in a high-speed mixer for 10 minutes, the mixing temperature is 65 ° C, and the speed of the mixer is 1000 r / min to obtain coupling agent pretreated titanium dioxide and titanium dioxide whiskers ; 65 parts of PVDF, 20 parts of PMMA, the obtained pretreatment titanium dioxide and titanium dioxide whiskers, 1.5 parts of octadecyl erucamide, 1.8 parts of antioxidant (1010:168=1:0.8) in a high-speed mixer Mix for 15 minutes, the mixing temperature is 60°C, and the speed of the mixer is 1500r / nim. The obtained mixture is melt-processed and granulated on a twin-screw extruder at a temperature of 210°C. Film, temperature 190°C, film thickness 25 μm.

Embodiment 3

[0044] Mix 1.5 parts of silane coupling agent, 12 parts of titanium dioxide and 3 parts of alumina whiskers in a high-speed mixer for 20 minutes, the mixing temperature is 70 ° C, and the speed of the mixer is 1200 r / min to obtain coupling agent pretreated titanium dioxide and alumina Whiskers; 70 parts of PVDF, 15 parts of PMMA, pretreated titanium dioxide and alumina whiskers obtained, 0.5 parts of octadecyl erucamide, 1.0 part of antioxidant (1010:168=0.5:0.5) at high speed Mix in the mixer for 30 minutes, the mixing temperature is 40°C, the speed of the mixer is 1800r / nim, the obtained mixture is melted and processed on the twin-screw extruder, and the temperature is 220°C, and the special masterbatch for the back sheet film is obtained in the single-screw extruder The upper cast film is formed at a temperature of 210° C. and a film thickness of 25 μm.

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Abstract

The invention relates to the field of solar backboard membrane materials, and specifically relates to a high-strength and high-toughness PVDF solar backboard membrane material and a preparation methodthereof. The high-strength and high-toughness PVDF solar backboard membrane material comprises the following components: polyvinylidene fluoride, polymethyl methacrylate, titanium dioxide, nanometerinorganic whisker, coupling agent, heat stabilizer, and flow modifier, wherein the nanometer inorganic whisker has a diameter of 0.1-0.5 [mu]m, a length of 2-50 [mu]m, and a length-diameter ratio of 20-100. According to the high-strength and high-toughness PVDF solar backboard membrane material and the preparation method thereof, the strength and toughness of the PVDF backboard membrane are improved, and the problem of insufficient strength and toughness caused by only addition of the PMMA and titanium dioxide is solved; and the prepared PVDF backboard membrane material has tensile strength >=50 MPa and elongation at break >= 350% in a MD direction, has tensile strength >= 40 MPa and elongation at break >= 250% in a TD direction, and has low light transmittance, so that the reflectivity of sunlight is improved, and then the utilization rate of a backboard assembly to the sunlight is improved.

Description

technical field [0001] The invention relates to the field of solar backboard film materials, and specifically relates to a high-strength and high-toughness PVDF solar backboard film material and a preparation method thereof. Background technique [0002] PVDF has outstanding properties such as chemical corrosion resistance, high and low temperature resistance, and weather resistance. These excellent properties of PVDF make it particularly suitable as a solar backplane film material. However, pure PVDF raw materials have shortcomings such as difficulty in film formation, high film shrinkage, and high light transmittance. Usually, PMMA is added to modify PVDF film formation, and titanium dioxide is added to reduce the light transmittance of the film, but the addition of PMMA and titanium dioxide still has strength. Insufficient toughness, especially the low tensile strength and elongation at break of the film in TD direction. [0003] Aiming at the problem of strengthening an...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L27/16C08L33/12C08K13/06C08K9/06C08K7/08C08K7/10C08K3/22C08K5/134C08K5/526C08J5/18H01L31/049
CPCC08J5/18C08K2003/2241C08K2201/003C08K2201/004C08K2201/011C08K2201/016C08L27/16C08L2201/08C08L2203/204H01L31/049C08L33/12C08K13/06C08K9/06C08K7/08C08K3/22C08K5/1345C08K5/526C08K7/10Y02E10/50
Inventor 王汉利韩瑞芹杜延华马丽唐妮李秀芬
Owner SHANDONG HUAXIA SHENZHOU NEW MATERIAL