Microporous laminated membrane and method for producing the same

A technology for porous membranes and laminates, applied in separation methods, chemical instruments and methods, membranes, etc., can solve problems such as inability to ensure strength, and achieve the effects of sufficient strength, excellent air permeability, and high surface smoothness
CN104999745AInactive Publication Date: 2015-10-28DAICEL CHEM IND LTD
11 Cites 24 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
DAICEL CHEM IND LTD
Publication Date
2015-10-28
Estimated Expiration
Not applicable · inactive patent

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
Patent Text Reader

Abstract

Disclosed is a microporous laminated membrane including a nonwoven-fabric substrate and a microporous membrane. The microporous membrane is disposed on at least one side of the nonwoven-fabric substrate. The microporous membrane includes a multiplicity of interconnecting micropores. The micropores have an average pore diameter of from 0.01 to 10 μm. The microporous membrane has an arithmetic mean surface roughness Sa of 0.5 μm or less. The microporous laminated membrane has an air permeability of from 0.5 to 30 seconds. The microporous laminated membrane has a tensile strength of 4.0 N / 15 mm or more. The microporous laminated membrane does not undergo interfacial peeling between the substrate and the microporous membrane as a result of a tape peel test.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The present invention relates to a porous membrane laminate having micropores and handling strength, and a method of manufacturing the same. More specifically, it relates to a porous film laminate in which a porous film having a plurality of interconnected micropores is laminated on at least one surface of a nonwoven fabric base material, and a method for producing the same. Background technique

[0002] As a porous membrane having micropores, for example, Patent Document 1 discloses a porous membrane composed of an amide-imide polymer or an imide polymer. A porous membrane is disclosed, which is characterized in that the thickness of the membrane is 5-200 μm, the average pore diameter of micropores is 0.01-10 μm, the porosity is 30-80%, and the air permeability representing the connectivity of micropores is The Gurley value is 0.2 to 29 seconds / 100cc.

[0003] In addition, Patent Document 2 discloses a laminate in which a porous film is laminated on...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More