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US 4,070,519 AGranted
High temperature filter fabrics
AssigneeHuyck Corporation
InventorsLeonard R. Lefkowitz, W. Henrik Krohn
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Abstract
Generally, the present invention relates to a resin-treated filter fabric which comprises a surface or batt layer comprised of glass fibers which is joined, by needling, to an underlayer which is comprised of mineral fibers. The present invention includes within its scope a method of manufacturing such a filter fabric.
Claims14
A filter fabric comprising
- a non-woven fibrous surface layer needled to a woven base layer characterized by the fact that said surface layer comprises glass fibers which are 2 to 8 microns in diameter,
- said base layer comprises yarns which comprise mineral fibers, and
- said surface layer and said base layer are impregnated with resin.
A filter fabric comprising a non-woven fibrous surface layer needled to an underlayer characterized by the fact that
- said surface layer comprises glass fibers which are 3 to 5 microns in diameter and which are blended with an antistatic material,
- said base layer is a woven construction and comprises yarns which comprise asbestos fibers,
- the ratio, by weight, of said glass fibers to said asbestos fibers is 1 to 1.5, and
- said surface layer and said underlayer are impregnated with a silicone resin.
1 more element
Dependencies are inferred from the claim text.