D - Textiles – Paper – 04 – H
Patent
D - Textiles, Paper
04
H
117/123
D04H 3/14 (2006.01) A41D 13/11 (2006.01) B01D 39/08 (2006.01) B03C 3/28 (2006.01) D04H 1/54 (2006.01)
Patent
CA 1158111
PATENT APPLICATION entitled: Process for the superficial treatment of a fibrous filtering layer, which is non-woven and highly aerated, forming electret, and application thereof to filters and to breathing masks in particular INVENTOR : Bernard Thiebault ABSTRACT OF THE DISCLOSURE 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 fibres are flattened on the subjacent fibrous mass without the latter being com- pressed, the friction being exerted at a softening temperature such that the superficial fibres are welded together to form a s kin or porous glaze. The smoothing is preferably effected by means of a metal mass whose temperature is between 115 and 150°C. This process may be applied to the outer face of a fil- tering 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.
375051
Gowling Lafleur Henderson Llp
Seplast
LandOfFree
Process for the superficial treatment of a fibrous filtering... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Process for the superficial treatment of a fibrous filtering..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for the superficial treatment of a fibrous filtering... will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-664309