Nonwoven filter material

Details Nonwoven filter material Nonwoven filter material

1988-12-22

1990-04-17

Bell, James J.

Stock material or miscellaneous articles

Structurally defined web or sheet

Discontinuous or differential coating, impregnation or bond

55155, 55486, 55DIG39, 428284, 428296, 428297, 428298, 428903, B32B 2700

Patent

active

049179420

ABSTRACT:
Improved microfibrous filtration laminate comprising a highly permeable layer of a self-supporting nonwoven fabric which provided support for a layer of a randomly intertangled nonwoven mat of electret-containing microfibers of synthetic polymers are disclosed. The filtration laminate, which is particularly useful as disposable filter bags or as a lining material for disposable paper filter bags for vacuum cleaners, is characterized by thickness and handling characteristics approaching that of paper filter material typically use in disposable vacuum clean bags but having improved performance in the areas of an immediate, high particle capture efficiency, minimal flow restriction and long service life.

REFERENCES:
patent: 4011067 (1977-03-01), Carey
patent: 4041203 (1977-09-01), Brock et al.
patent: 4116648 (1978-09-01), Busch
patent: 4164400 (1979-08-01), Wald
patent: 4215682 (1980-08-01), Kubik et al.
patent: 4257791 (1981-03-01), Wald
patent: 4375718 (1983-03-01), Wadsworth et al.
patent: 4478620 (1984-10-01), Tamura
patent: 4589894 (1986-05-01), Gin et al.
patent: 4650506 (1987-03-01), Barris et al.

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