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Pfa porous sheet

A porous and sheet technology, applied in the direction of melt spinning, textiles, papermaking, non-woven fabrics, etc., can solve the problems that cannot be applied

Inactive Publication Date: 2012-10-24
UNIVERSITY OF YAMANASHI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the ES method is a method of dissolving a polymer in a solvent and applying a high voltage, so it cannot be applied to a situation where there is no suitable solvent such as PFA. In addition, the network obtained by the ES method has a large number of agglomerates larger than the fiber diameter, which is also a problem. There are many disadvantages

Method used

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Examples

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Embodiment Construction

[0062] Hereinafter, examples of embodiments of the present invention will be described with reference to the drawings. figure 1 An electron micrograph (magnification: 10,000) shows a porous sheet of the present invention composed of PFA fibrils with a plurality of PFA fine particles. The many filaments in the figure represent the stretched PFA porous sheet accumulated on the conveyor net moving at 0.030 m / min. The dimensions shown in the figure are from 200 nm to 800 nm, and all the filaments are 10 μm or less. In addition, a plurality of microparticles are attached to each filament in the figure, and when observed, the particles are spherical and have a particle diameter of 100 nm or less, which is smaller than the diameter of the observed filament. Only the fine particles were collected and subjected to GPC measurement or DSC measurement, but no difference was found from the results of the porous sheet containing fibrils. For the porous sheet in this figure, the PFA fibri...

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Abstract

To provide a PFA porous sheet comprising a PFA (tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer) microfilament group and has enhanced tensile strength and a specific surface area. ; SOLUTION: There are provided the PFA porous sheet includes a filament group comprising PFA having an average filament diameter of not more than 10 [mu]m, and the filament contains many fine PFA particles having an average filament diameter or smaller, and a method for producing the same is further provided.

Description

technical field [0001] The present invention relates to a PFA porous sheet characterized by comprising a group of filaments composed of PFA (tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer) having a thickness of 10 μm or less, each fiber The filament has a plurality of PFA fine particles having a diameter smaller than the filament, and the present invention relates to a porous PFA sheet composed of microfibrils whose strength and specific surface area as a sheet are increased by including a plurality of PFA fine particles material. Background technique [0002] Fluoropolymers are useful because of their high heat resistance, good chemical resistance, excellent weather resistance, excellent electrical properties, non-adhesive surface, and low coefficient of friction. functional polymers. Polytetrafluoroethylene (PTFE), which is a typical example, has the highest heat resistance, but is difficult to melt-mold and is often limited in practical use. PFA can be melt-f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D04H3/007D04H3/12D01D5/08D04H1/413D04H1/4318
CPCD04H1/4326D04H3/009
Inventor 铃木章泰黑田幸司
Owner UNIVERSITY OF YAMANASHI
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