Production method for laminated air filter

Details Production method for laminated air filter Production method for laminated air filter

1998-08-27

2000-02-29

Johnstone, Adrienne C.

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

55486, 55528, 55DIG5, 1563096, 156322, 156324, 264234, 264344, 264345, 4283166, 428421, 442397, B01D 3916, B32B 3104, B32B 3112, B32B 3114

Patent

active

060304847

ABSTRACT:
An air filter comprising a laminate of a non-woven fabric made up of polyolefin fibers or polyester fibers or a composite of the non-woven fabrics and a PTFE porous film, wherein the amount of the total gases generated from the air filter is 20 .mu.g/g by the analysis of gas chromatography. The amount of the gases generated from the air filter is greatly reduced by heat-treating the non-woven fabric at a temperature of from 80 to 130.degree. C. for from 5 minutes to 20 minutes before or after laminating with the PTFE porous film.

REFERENCES:
patent: 5234739 (1993-08-01), Tanaru et al.
patent: 5772884 (1998-06-01), Tanaka et al.

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