公开(公告)号：US3825380A

公开(公告)日：1974-07-23

申请号：US26962472

申请日：1972-07-07

Applicant: EXXON RESEARCH ENGINEERING CO

Inventor： HARDING J ,  KELLER J ,  BUNTIN R

IPC: D01D5/08 ,  B29C47/12 ,  B29C47/30 ,  D01D5/098 ,  D04H1/56 ,  D04H3/03 ,  B29F3/04

CPC classification number: D01D5/0985 ,  B29C47/0021 ,  B29C47/12 ,  B29C47/30 ,  D04H1/56

Abstract: A die having a special nose configuration approximating a triangle in cross section is especially suitable for use in a melt-blowing process for making very fine fibers from thermoplastic materials. A plurality of orifices are located in an edge-apex formed at the juncture of two sides of said triangle. The included angle encompassing said edge is within the range of 30* to 90*. The essential feature of said edge is that there are essentially no dead spaces where polymer can collect during the melt-blowing process. Any point on the edge which is more than about 0.002 inches (2 mils) from where the sides make initial contact with said edge is considered to be a dead space. Another feature of the invention involves air slot adjustment means in combination with said die nose.

公开(公告)号：US3811957A

公开(公告)日：1974-05-21

申请号：US26732572

申请日：1972-06-29

Applicant: EXXON RESEARCH ENGINEERING CO

Inventor： BUNTIN R

IPC: D04H1/56 ,  H01M2/14 ,  H01M2/16 ,  H01M3/00

CPC classification number: H01M2/16 ,  D04H1/56 ,  H01M2/14

Abstract: A battery separator and the process for preparing it, having excellent abrasion resistance, stiffness, porosity, pore size, and electrical resistance is produced from a non-woven mat of randomly laid, self-bonded polymeric fibers. The mat is produced by a melt-blowing process. The non-woven mat is then compacted, in a critical manner, preferably at temperatures for polypropylene of from 290* to 310* F., using relatively low pressures, i.e., 10 psi/in2 or less, to obtain a battery separator meeting precise and essential specifications.