Multi-layered plastic dropcloth and like sheet-like covers
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...
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Sprache: | eng |
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Zusammenfassung: | 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. |
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