Title:
MOISTURE PERMEABLE WATER-PROOF SHEET
Document Type and Number:
Japanese Patent JP3293244
Kind Code:
B2
Abstract:
PURPOSE: To prevent dewing by forming a moisture permeable water-proof sheet adhering and integrating a melt blow nonwoven fabric specifying an average fiber diameter and METSUKE (weight/unit area) and a long fiber nonwoven fabric specifying an average fiber diameter and METSUKE with each other.
CONSTITUTION: A melt blow extra fine fiber nonwoven fabric A constituted so that an average fiber diameter is 5 microns or less, METSUKE is about 15g/m2 or more and apparent density is about 0.40g/cm3 or less is formed. A laminated nonwoven fabric is formed by adhering and integrating a long fiber nonwoven fabric B an average fiber diameter of which is 10 microns or more and METSUKE of which is about 15g/m2 or more at least on one face of the melt blow extra fine fiber nonwoven fabric A. Additionally, surface roughness on a non-adhered side of the long fiber nonwoven fabric B is made about 4 microns or less and a fiber sufficiency rate of a surface layer part from the surface to the depth of 40 microns is made about 60% or more. Consequently, it is possible to improve workability by way of providing excellent moisture permeability and a water proofing property.
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Inventors:
Toshio Nishikawa
Katsutoshi Ando
Katsutoshi Ando
Application Number:
JP15524893A
Publication Date:
June 17, 2002
Filing Date:
June 25, 1993
Export Citation:
Assignee:
Toray Industries, Inc.
International Classes:
B32B27/02; E04B1/64; E04B1/76; E04D12/00; (IPC1-7): E04B1/64; B32B27/02; E04B1/76; E04D12/00
Domestic Patent References:
| JP5361766A | ||||
| JP180330U |
Attorney, Agent or Firm:
Shinichi Ogawa (2 outside)