Multi-layered plastic dropcloth and like sheet-like covers

Details Multi-layered plastic dropcloth and like sheet-like covers Multi-layered plastic dropcloth and like sheet-like covers

1992-06-19

1993-11-30

Lesmes, George F.

Stock material or miscellaneous articles

Structurally defined web or sheet

Including components having same physical characteristic in...

428141, 428156, 428192, 428284, 428286, 428296, B32B 300, B32B 2302, B32B 2700, D04H 104

Patent

active

052663906

ABSTRACT:
A multiple layer plastic dropcloth includes outer layers of spun bonded polypropylene film intimately bonded to an intermediate film of either a polyethylene film or a polypropylene film. The films are mounted in superimposed relation and thermally bonded to each other. The spun bonded polypropylene film absorbs and transmits liquids such as paint, wood stains, paint thinners, solvents and the like. The polyethylene film and the polypropylene film are impervious to such liquids and prevent transmission through the dropcloth of material absorbed by the outer surfaces. The dropcloth surface treated to form similar form of opposed surfaces with small closely spaced impressions extending uniformly over the cloth. The surface treatment contributes to the softness of the dropcloth as well as improves the gripping characteristic of the dropcloth to the cover surface to be protected. Indefinite film lengths can be passed between heating units and opposed fusion rolls to simultaneously effect a fusion bonding of the plastic films. Embossing can be made by appropriate embossing rolls.

REFERENCES:
patent: 4913954 (1990-04-01), Mack
patent: 4973375 (1990-11-01), Nishida et al.
patent: 4981747 (1991-01-01), Morman
patent: 5061553 (1991-10-01), Olsen, Jr.
patent: 5064724 (1991-11-01), Ofstein
patent: 5071686 (1991-12-01), Genske et al.
patent: 5080960 (1992-01-01), Smorada

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