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Fluorine-contained film and preparation method thereof

A technology of film and vinylidene fluoride, which is applied in the field of fluorine-containing film and its preparation, can solve the problems of high melting point temperature, low mechanical strength, and difficult processing of fluoroplastics, and achieve excellent optical properties and ideal weather resistance

Inactive Publication Date: 2010-04-21
CHANGSHU TOP SOLAR MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Fluoroplastics are a kind of difficult-to-process resins, which have a high melting point and are easily decomposed in the molten state or under high shear for a long time. It is more difficult to prepare fluorine materials into thin films.
At present, the preparation method of existing fluorine-containing film has melting extrusion method, calendering method, solution casting method etc.: CN101168296A and US3133854 have introduced the method for solution casting method to prepare polyvinyl fluoride film, but this method needs a large amount of solvent, The fluorine-containing resin must be dissolved or swelled, mixed uniformly, defoamed, formed and dried. The production cycle is long and the equipment cost is extremely expensive. rate is not high

Method used

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  • Fluorine-contained film and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] a) Granulation, first put 59 parts of polyvinylidene fluoride polymer, 40 parts of polymethyl methacrylate and 0.5 part of benzotriazole absorbent and 0.5 part of hindered phenol light stabilizer into a twin-screw extruder to mix, Extrude and granulate at 210°C to obtain pellets;

[0032] b) film forming, melt and extrude the pellets obtained in step a) in a single-screw extruder, the melting temperature of each segment of the extrusion screw is 200°C, 200°C, and 200°C in sequence, and the temperature of the ring die is 210°C , to obtain a tubular non-oriented film;

[0033] c) preparing an oriented film, and stretching the tubular non-oriented film obtained in step b) twice at 220° C., with an inflation ratio of 2, to obtain a tubular oriented film;

[0034] d) After-treatment, heat-treat the tubular oriented film obtained in step c) at 150° C., trim and corona, and wind up to obtain a fluorine-containing film with a thickness of 30 μm.

Embodiment 2

[0036] a) To granulate, first 76 parts of the copolymer of vinylidene fluoride-hexafluoropropylene (where the weight ratio of hexafluoropropylene in the copolymer is 12%), 20 parts of polypropylmethacrylate and 2 parts of triazine ultraviolet The light absorber and 2 parts of hindered amine light stabilizer are put into a twin-screw extruder for mixing, extruded and granulated at 200°C to obtain pellets;

[0037] b) film formation, melt and extrude the pellets obtained in step a) in a single-screw extruder, the melting temperatures of each section of the extrusion screw are 200°C, 220°C, and 220°C in sequence, and the temperature of the T die is 230°C , the distance between the T die lip and the casting roll is 10mm, the surface temperature of the casting roll is 15°C, and the temperature of the cooling roll is 25°C to obtain a non-oriented film;

[0038] c) To prepare an oriented film, the non-oriented film obtained in step b) is subjected to asynchronous secondary biaxial st...

Embodiment 3

[0041] a) Granulation, first put 68 parts of polyvinylidene fluoride homopolymer, 20 parts of polyethyl methacrylate and 1 part of triazine ultraviolet light absorber, 1 part of hindered phenol light stabilizer and 8 parts of titanium dioxide into double Screw extruder mixing, extruding and granulating at 210°C to obtain pellets;

[0042] b) film formation, the pellets obtained in step a) are melted and extruded in a twin-screw extruder, the melting temperatures of each section of the extrusion screw are 200°C, 220°C, and 220°C in sequence, and the temperature of the T die is 220°C , the distance between the T die lip and the casting roll is 20mm, the surface temperature of the casting roll is 30°C, and the temperature of the cooling roll is 20°C to obtain a non-oriented film;

[0043] c) To prepare an oriented film, the non-oriented film obtained in step b) is subjected to simultaneous two-time biaxial stretching, specifically, the non-oriented film is simultaneously stretche...

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Abstract

The invention relates to a fluorine-contained film and a preparation method thereof. The fluorine-contained film is prepared from the following raw materials in parts by weight: 50-90 polyvinylidene fluoride polymer, 10-40 polymethacrylic acid resin and 0.5-10 additives. The fluorine-contained film prepared by the technical scheme provided by the invention has ideal mechanical performance and weatherability and excellent optical performance, wherein the ideal mechanical performance refers to longitudinal tensile strength larger than 130MPa, longitudinal at-break elongation larger than 95 percent, longitudinal tensile modulus larger than 2000MPa, transversal tensile strength larger than 150MPa, transversal at-break elongation larger than 80 percent and transversal tensile modulus larger than 2000MPa.

Description

technical field [0001] The invention relates to a fluorine-containing film and a preparation method thereof. Background technique [0002] In recent years, the variety of fusible fluorine-containing plastic films has been increasing, and the application fields have also been expanding. In addition to traditional chemical equipment manufacturing, electronics and electrical technology, aviation and aerospace technology and other fields, its application fields have expanded to industrial construction, civil construction, automobile manufacturing and solar cell energy. Fluoropolymer film can be used as a protective and decorative surface layer for many substrate materials, due to its excellent chemical resistance and aging resistance, the fluoropolymer in the film layer can protect the less durable substrate Materials are protected from damage in harsh outdoor or indoor environments. Therefore, multifunctional and decorative fluoropolymer film structures are being continuously...

Claims

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Application Information

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IPC IPC(8): C08L27/16B29B9/06B29C47/92B29C55/12B29C71/02B29C48/92
CPCB29C48/04B29C48/92B29C2948/92704B29C2948/92895
Inventor 邵名巍杨小旭
Owner CHANGSHU TOP SOLAR MATERIAL
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