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Title:
コンクリート型枠ライナー
Document Type and Number:
Japanese Patent JP4135981
Kind Code:
B2
Abstract:
A concrete form liner includes a microporous membrane having pores that transmit water, but prevent the passage of particles with a diameter of 2 microns or greater, and a porous sheet having pores in the range of 0.2 microns to 60 microns on one side of the microporous membrane, the porous sheet having an air permeability at least five times greater than that of the microporous membrane. The form liner is permeable to air and water in a concrete mix, but is substantially impermeable to cement particles in the concrete mix. A drainage scrim may be juxtaposed against the side of the microporous membrane opposite the porous sheet.

Inventors:
Franca Luigi, Serahuini
Application Number:
JP51576698A
Publication Date:
August 20, 2008
Filing Date:
September 23, 1997
Export Citation:
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Assignee:
E. I. Dupont Do Nemour & Company
International Classes:
B28B7/36; B28B7/46; E04G9/10
Domestic Patent References:
JP8501738A
JP2128802A
JP6143236A
JP3130109A
JP5016126A
JP2204573A
Attorney, Agent or Firm:
Patent business corporation Odashima patent office
Heikichi Odashima
Heigo Odashima