Title:
【発明の名称】調節された多孔度のカレンダー加工された紡糸結合/溶融吹き込み成形ラミネート
Document Type and Number:
Japanese Patent JPH09503459
Kind Code:
A
Abstract:
Controlled porosity composite sheets comprising a melt-blown polypropylene fiber web having a spunbonded polypropylene fiber sheet laminated to at least one side thereof are made by calendering an assembly of the component webs in such a manner that, when a two-layer composite sheet is made, the web of melt-blown fibers is in contact with a metal roll heated to 140 DEG -170 DEG C. operating against an unheated resilient roll; and, when a three-layer composite sheet is made, the spunbonded web in contact with the heated metal roll has a dtex per fiber value of less than 6. These composite sheets have a Gurley-Hill porosity of about 5-75 seconds, excellent mechanical and tear strengths, high water vapor penetration rate, and low liquid water permeability. They are particularly suitable for making housewrap sheets and sheets for sterile packaging. In the sterile packaging field, they are significantly better than medical paper used for the same purpose.
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Inventors:
Lim, Hiyun Sung
Shin, Hiyunkutsuku
Shin, Hiyunkutsuku
Application Number:
JP51082595A
Publication Date:
April 08, 1997
Filing Date:
September 30, 1994
Export Citation:
Assignee:
E. I. Dupont Do Nemour & Company
International Classes:
B32B5/26; D04H1/56; D04H1/72; D04H3/16; D04H13/00; D06M17/00; (IPC1-7): B32B5/26; D06M17/00; D04H13/00; D04H3/16; D04H1/72
Attorney, Agent or Firm:
Heiyoshi Odashima (1 person outside)