초록 ▼

An air filter is described which is made of a non-woven fabric and an overlapped synthetic net which are intermittently point bonded together. The net has raised bumps which form the bonding points for the fabric. A filter of this design is structurally strong but does not generate a large air press

An air filter is described which is made of a non-woven fabric and an overlapped synthetic net which are intermittently point bonded together. The net has raised bumps which form the bonding points for the fabric. A filter of this design is structurally strong but does not generate a large air pressure loss.

대표청구항 ▼

An air filter comprising: a non-woven fabric of fibers having an area to weight relationship of less than about 200 g per sq m and being constructed so as to produce an air pressure loss across its thickness of less than about 3.0 mm Water when measured at an air speed of 2 m per sec; a net of synth

An air filter comprising: a non-woven fabric of fibers having an area to weight relationship of less than about 200 g per sq m and being constructed so as to produce an air pressure loss across its thickness of less than about 3.0 mm Water when measured at an air speed of 2 m per sec; a net of synthetic resin strands overlapping and coterminus with the fabric, the net having convex shaped portions of said synthetic resin substantially uniformly distributed along the strands which are raised at least approximately 0.3 mm above the strand surfaces and are directed toward the non-woven fabric; wherein the fabric and net are bonded together by thermal integration of the convex shaped portions of the net and the corresponding overlapping portions of fabric fibers into a matrix arrangement, and wherein unraised portions of said strands are not substantially bonded to said fibers.