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A kind of polyvinylidene fluoride film and preparation method thereof

A polyvinylidene fluoride film technology, applied in the field of polyvinylidene fluoride film and its preparation, can solve the problem of poor weather resistance, gas barrier property and mechanical strength of polyvinylidene fluoride film, failure to meet material performance requirements, and material performance deterioration etc. to achieve excellent UV resistance, excellent weather resistance, transparency and increased mechanical properties

Active Publication Date: 2020-12-08
南京君弘新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The existing polyvinylidene fluoride films have poor properties such as weather resistance, gas barrier properties, and mechanical strength. This is because the addition of other substances will make the film brittle, easy to absorb water, and degrade after short-term exposure to sunlight. Yellowing, etc., impairs material performance deterioration
Therefore, at present, high-performance PVDF films need to be imported, and most PVDF films are still produced on a large scale by traditional blow molding, casting and compression molding methods, which cannot meet the increasing material performance requirements with the development of social science and technology.

Method used

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  • A kind of polyvinylidene fluoride film and preparation method thereof
  • A kind of polyvinylidene fluoride film and preparation method thereof
  • A kind of polyvinylidene fluoride film and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Raw material and content: 92 parts of polyvinylidene fluoride, 5 parts of polyethylene, 6 parts of calcium carbonate, 3 parts of bis(N,N-dimethylhydrazideamino-4-phenyl)methane, 4 parts of polyisobutylene, methyl 1 part of sodium silicate, 3 parts of microcrystalline paraffin, 6 parts of trichloroethylene, 7 parts of maleic anhydride and 2-(2'-hydroxy-3',5'-di-tert-phenyl)-5-chloride 8 parts of benzotriazole.

[0015] The preparation method comprises the following steps:

[0016] (1) After mixing polyvinylidene fluoride, polyethylene, calcium carbonate, polyisobutylene, sodium methyl silicate, microcrystalline paraffin, trichloroethylene and maleic anhydride, add bis(N,N-dimethyl Hydrazineamino-4-phenyl)methane and 2-(2'-hydroxy-3',5'-di-tert-phenyl)-5-chlorinated benzotriazole, mixed evenly, sent to the mixer and stirred at 900rpm for 20min ;

[0017] (2) Send the above-mentioned uniformly mixed raw materials to the extruder at a speed of 200kg / h for melting, the me...

Embodiment 2

[0021] Raw material and content: 93 parts of polyvinylidene fluoride, 4 parts of polymethyl methacrylate, 6 parts of talcum powder, 2 parts of 1,6-hexamethylene-bis(N,N-dimethylsemicarbazide), 2 parts of polymethylmethacrylate 5 parts of isobutylene, 1 part of sodium methyl silicate, 3 parts of microcrystalline paraffin, 7 parts of trichlorethylene, 6 parts of maleic anhydride and 9 parts of 2-hydroxy-4-n-octyloxybenzophenone.

[0022] The preparation method comprises the following steps:

[0023] (1) Mix polyvinylidene fluoride, polymethyl methacrylate, talcum powder, polyisobutylene, sodium methyl silicate, microcrystalline paraffin, trichloroethylene and maleic anhydride and add 1,6-hexaethylene Methyl-bis(N,N-dimethylsemicarbazide) and 2-hydroxy-4-n-octyloxybenzophenone, mixed evenly, sent to the mixer and stirred at 800rpm for 30min;

[0024] (2) Send the uniformly mixed raw materials to the extruder at a speed of 100kg / h for melting, and the melting temperature is 180°C...

Embodiment 3

[0027] Raw material and content: 93 parts of polyvinylidene fluoride, 6 parts of polypropylene, 7 parts of silicon dioxide, 3 parts of bis(N,N-dimethylhydrazideamino-4-phenyl)methane, 4 parts of polyisobutylene, 2 parts of sodium silicate, 2 parts of microcrystalline paraffin, 6 parts of trichloroethylene, 8 parts of maleic anhydride and 2-(2'-hydroxy-3',5'-di-tert-phenyl)-5-chloro 7 parts of benzotriazoles.

[0028] The preparation method comprises the following steps:

[0029] (1) Add bis(N,N-dimethyl Hydrazide amino-4-phenyl)methane and 2-(2'-hydroxy-3',5'-di-tert-phenyl)-5-chlorinated benzotriazole, mix well and send to the mixer to stir at 1000rpm 10min;

[0030] (2) Send the uniformly mixed raw materials to the extruder at a speed of 300kg / h for melting, and the melting temperature is 180°C, then filter through 100 mesh, flow out of the die head at a speed of 30r / min after metering feedback, and flow out at a speed of 30m / min speed for casting;

[0031] (3) Preheat...

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Abstract

The invention discloses a polyvinylidene fluoride film and a preparation method thereof. The film is prepared from polyvinylidene fluoride, auxiliary materials, inorganic filling materials, anti-yellowing agents, polyisobutene, sodium methyl silicate, microcrystalline wax, trichloro ethylene, maleic anhydride and ultraviolet light absorbers. According to the preparation method, the polyvinylidenefluoride, the auxiliary materials, the inorganic filling materials, the polyisobutene, the sodium methyl silicate, the microcrystalline wax, the trichloro ethylene and the maleic anhydride are mixed;then, the anti-yellowing agents and the ultraviolet light absorbers are added; uniform mixing and sheet casting are performed; next, the cast sheets are preheated; longitudinal stretching is firstly performed; then, transverse stretching is performed. The polyvinylidene fluoride film and the preparation method have the obvious advantages that the polyvinylidene fluoride film obtained through biaxial stretching has excellent weather resistance, gas blocking performance and waterproof performance; in addition, degradation and yellowing cannot easily occur under the sunlight irradiation in a short period; excellent UV-resistance performance, high transparency and high mechanical property are realized.

Description

technical field [0001] The invention belongs to the field of films, in particular to a polyvinylidene fluoride film and a preparation method thereof. Background technique [0002] Polyvinylidene fluoride film (PVDF) is a CH 2 -CF 2 The structural units constitute a functional film that has both the properties of fluororesins and general-purpose resins. PVDF film has good weather resistance, UV aging resistance, radiation resistance, wear resistance and chemical stability. In addition, PVDF film also has piezoelectricity, dielectricity and pyroelectricity. It is one of the fluorine materials. The second highest demand product in production. Polyvinylidene fluoride film plays an important role in industries such as solar cells, outdoor construction, pharmaceutical packaging, filtration and purification, radiation protection and corrosion resistance, and electronic products. [0003] The existing polyvinylidene fluoride films have poor properties such as weather resistance,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L27/16C08L23/20C08L91/06C08K13/02C08K5/5419C08K5/02C08K5/1539C08J5/18
CPCC08J5/18C08J2327/16C08J2423/20C08J2491/06C08K5/02C08K5/1539C08K5/5419C08K13/02
Inventor 徐成呈李春阳王新鹏朱成
Owner 南京君弘新材料有限公司
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