Dust collecting filter cloth

Details Dust collecting filter cloth Dust collecting filter cloth

1990-07-27

1994-06-07

Lesmes, George F.

Stock material or miscellaneous articles

Structurally defined web or sheet

Discontinuous or differential coating, impregnation or bond

428286, 428288, 428296, 428300, 428302, D04A 108, B32B 2700, B32B 506

Patent

active

053188314

ABSTRACT:
A filter cloth having a needle felt layer laminated to a nonwoven fabric sheet made of ultrafine fibers. The fibers of the nonwoven fabric sheet have a fineness of 0.2 denier or less and the fabric sheet is formed by the melt blow method. The needle felt layer preferably has a weight of from 150 g/m.sup.2 to 900 g/m.sup.2, a longitudinal tensile strength of at least 20 kg/5 cm, a transverse tensile strength of at least 20 kg/5 cm and a bursting strength of at least 10 kg/cm.sup.2.

REFERENCES:
patent: 4476186 (1984-10-01), Kato et al.
patent: 4840838 (1989-06-01), Wyss

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