Gas-permeable, liquid-impermeable nonwoven material

Details Gas-permeable, liquid-impermeable nonwoven material Gas-permeable, liquid-impermeable nonwoven material

1988-10-17

1990-02-27

Cannon, James C.

Stock material or miscellaneous articles

Structurally defined web or sheet

Including components having same physical characteristic in...

128849, 162146, 162149, 162207, 206438, 206439, 2065242, 2065246, 206811, 220449, 220453, 220DIG11, 229 31, 229 35R, 428286, 428288, 428296, 428297, 428302, 4283115, 4283155, 4283159, A61F 1300, B01D 3916, B32B 532, D21H 108, D21H 520

Patent

active

049045202

ABSTRACT:
Disclosed is a liquid-impermeable, gas-permeable nonwoven material comprising a thermally consolidated blend of (1) 5% to 30% of a first polyolefin pulp, (2) 15% to 90% of a second polyolefin pulp having a melting point at least 20.degree. C. higher than the first polyolefin pulp, and (3) 5% to 55% of a staple fiber. Also disclosed is a wet forming method for making such a nonwoven material without the use of surfactants.

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patent: 4645565 (1987-02-01), Vallee et al.
patent: 4657804 (1987-04-01), Mays et al.
patent: 4728394 (1988-03-01), Shinjou et al.
patent: 4818340 (1989-04-01), Hasegawa et al.

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