Title:
POLYTETRAFLUOROETHYLENE HOLLOW FIBER MEMBRANE
Document Type and Number:
WIPO Patent Application WO/2017/080457
Kind Code:
A1
Abstract:
Provided is a polytetrafluoroethylene hollow fiber membrane, comprising a body of a polytetrafluoroethylene material, the polytetrafluoroethylene material being fibrous with a fiber diameter of 30-200nm. The body has pore cavities with a pore diameter of 10nm-1000nm and cavity walls formed around the pore cavities in three-dimensional space, the pore cavities thereof being distributed uniformly, each of the pore cavities being three-dimensionally through. The pore cavities being distributed uniformly means that the pore cavities are distributed uniformly in the porous material in a volume of any unit level. The porosity is 70% or more, the transmittance is 50% or more, the tensile strength is 20N/mm2 or more, and the water pressure resistance is 4kg/cm2or more. This invention proposes a specific and definite measurement method for the uniform distribution of the pore cavities in the polytetrafluoroethylene hollow fiber membrane, defining that the uniformity of the pore distribution in the porous material and the multilevel structure thereof is measured in a scale of a volume at small unit level. Such a porous structure is highly uniform, thereby ensuring the uniformity and consistency of the performances of the porous material.
Inventors:
YE LEI (CN)
Application Number:
PCT/CN2016/105240
Publication Date:
May 18, 2017
Filing Date:
November 09, 2016
Export Citation:
Assignee:
CHONGQING RUNZE PHARMACEUTICAL (CN)
International Classes:
B01D71/36; B01D69/08
Foreign References:
| CN104906968A | 2015-09-16 | |||
| CN102266725A | 2011-12-07 | |||
| CN101961608A | 2011-02-02 | |||
| KR20130109730A | 2013-10-08 |
Attorney, Agent or Firm:
CHONGQING HONGXU PATENT AGENCY CO., LTD. (CN)
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