Porous nonwoven film-fibril sheet having optical transmission pr

Details Porous nonwoven film-fibril sheet having optical transmission pr Porous nonwoven film-fibril sheet having optical transmission pr

1974-05-03

1978-05-23

Dixon, Jr., William R.

Stock material or miscellaneous articles

Structurally defined web or sheet

Discontinuous or differential coating, impregnation or bond

428131, 428156, 428219, 428280, 428296, 428340, B32B 714

Patent

active

040911373

ABSTRACT:
A lightweight, abrasion resistant nonwoven film-fibril sheet of thermoplastic polymer embossed over substantially the entire area of at least one surface with a pattern comprising from 50 to 1000 small fused regions per square inch which in the aggregate represent from 3 to 25% of the total area of the surface of the sheet, said embossed regions having an average optical transmission of at least 50% and a method of making such sheets.

REFERENCES:
patent: 3073714 (1963-01-01), Tu et al.
patent: 3169899 (1965-02-01), Steuber
patent: 3478141 (1969-11-01), Dempsey et al.
patent: 3619339 (1971-11-01), Garrett

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