Porous sheet

Details Porous sheet Porous sheet

1981-05-29

1982-12-21

Thibodeau, Paul J.

Stock material or miscellaneous articles

Structurally defined web or sheet

Continuous and nonuniform or irregular surface on layer or...

51281R, 264239, 264340, 428143, 428323, 428325, 428327, 428330, 428331, 428332, B32B 516, B32B 2714

Patent

active

043649858

ABSTRACT:
A porous sheet is disclosed that comprises a thin, flexible sheet made of thermoplastic resin having solid particles distributed therein. Small spaces are formed around the particles, such that abrasion or buffing of the opposite surfaces of the sheet causes the formation of a multitude of fine pores that extend through the sheet, making the sheet vapor-permeable but liquid-impermeable.

REFERENCES:
patent: 3154461 (1964-10-01), Johnson
patent: 3906684 (1975-09-01), Marshall et al.
patent: 4020211 (1977-04-01), Eigenmann
"Cultured Stones", SPE Journal, Aug. 1966, pp. 36-39.

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