Adhesive bonding and miscellaneous chemical manufacture – Methods – Surface bonding and/or assembly therefor
Patent
1981-04-06
1982-12-14
Massie, Jerome W.
Adhesive bonding and miscellaneous chemical manufacture
Methods
Surface bonding and/or assembly therefor
156296, 156555, 428218, 428296, B29H 904, D04H 308
Patent
active
043636829
ABSTRACT:
The process of the invention consists in smoothing the or each fluffy surface of the layer by exerting a slight friction under low pressure so that the projecting fibers are flattened on the subjacent fibrous mass without the latter being compressed, the friction being exerted at a softening temperature such that the superficial fibers are welded together to form a skin or porous glaze. The smoothing is preferably effected by means of a metal mass whose temperature is between 115.degree. and 150.degree. C. This process may be applied to the outer face of a filtering breathing mask constituted by an envelope made of this fibrous material covering a relatively rigid porous shell for protection of the skin; it may also be applied to at least one of the faces of filtering layers equipping filters of any type.
REFERENCES:
patent: 3652377 (1972-03-01), Helmick
patent: 3936337 (1976-02-01), Stapp
patent: 3953974 (1976-05-01), Bresson et al.
patent: 4093763 (1978-06-01), Hartman
patent: 4129675 (1978-12-01), Scott
patent: 4178157 (1979-12-01), Turnhout
patent: 4215682 (1980-08-01), Kubik et al.
Massie Jerome W.
Seplast
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