Concrete form liner

Details Concrete form liner Concrete form liner

1996-09-27

1998-10-20

Ryan, Patrick

Plastic article or earthenware shaping or treating: apparatus

With foraminous or absorbent means for removal of vehicle or...

249113, 249134, 249141, 249189, 264 86, B28B 736, E04G 910

Patent

active

058243470

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.

REFERENCES:
patent: 3169899 (1965-02-01), Steuber
patent: 4578301 (1986-03-01), Currie et al.
patent: 4730805 (1988-03-01), Yokota et al.
patent: 4787597 (1988-11-01), Yokota et al.
patent: 4815892 (1989-03-01), Martin
patent: 5124102 (1992-06-01), Serafini
patent: 5135692 (1992-08-01), Serafini
patent: 5206981 (1993-05-01), Serafini
patent: 5302099 (1994-04-01), Serafini
Hyun S.Lim, Ernest Mayer, Tyvek for Microfiltration Media, Fluid/Particle Separation Journal, 2, No. 1, 17-21, Mar. 1989.

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