To provide a wet nonwoven fabric for a battery separator and its manufacturing method in which a short circuit prevention performance and an electrolytic solution retention performance are superior even if the thickness is thin, a gas passage property is superior and a mechanical strength and a strong power in thickness direction are sufficient while the fabric is not cut off by a burr or an edge of an electrode in battery manufacturing.
(1) This is the wet nonwoven fabric for the battery separator in which a thermoplastic resin short fiber, a polyparaphenylene benzobisoxazole fiber or its pulp state material, and a heat welding fiber are mutually and three-dimensionally interlaced, and these fibers are adhered by a thermofusion of one or all part of the heat welding fiber. (2) This is the manufacturing method of the wet nonwoven fabric for the battery separator wherein a water stream is made to collide with a mixed sheet produced by a papermaking method as a raw material with the thermoplastic resin short fibers, the polyparaphenylene benzobisoxazole fiber or its pulp state material, and a heat welding fiber so that the fiber is three-dimensionally interlaced, and subsequently one or all part of the heat welding fiber is melted by a heat treatment.
TADOKORO YOSHIYUKI
ICHIYANAGI TAKAHARU
TOYO BOSEKI
| JPH10144282A | 1998-05-29 | |||
| JPH0574440A | 1993-03-26 | |||
| JPH0927311A | 1997-01-28 | |||
| JPH117936A | 1999-01-12 | |||
| JPH117937A | 1999-01-12 |
| WO1996030954A1 | 1996-10-03 |