发明名称 |
Method for making shaped filtration articles |
摘要 |
Shaped filtration articles are made from a monocomponent nonwoven web formed by flowing first and second fiber-forming materials of the same polymeric composition through first and second die cavities in respective fluid communication with first and second sets of orifices in a meltblowing die tip. The first fiber-forming material flows at a lesser flow rate or viscosity through the first die cavity and first set of orifices to form a set of smaller size filaments and the second fiber-forming material flows at a greater flow rate or viscosity through the second die cavity and second set of orifices to form a set of larger size filaments. The collected nonwoven web contains a meltblown bimodal mass fraction/fiber size mixture of intermingled continuous microfibers and larger size fibers of the same polymeric composition.
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申请公布号 |
US8029723(B2) |
申请公布日期 |
2011.10.04 |
申请号 |
US20070375494 |
申请日期 |
2007.07.17 |
申请人 |
3M INNOVATIVE PROPERTIES COMPANY |
发明人 |
ANGADJIVAND SEYED A.;JONES MARVIN E.;SPRINGETT JAMES E.;BRANDNER JOHN M.;LINDQUIST TIMOTHY J. |
分类号 |
D01D5/098;D04H3/14;D04H1/54;D04H3/16;D06M10/02;H05B7/00 |
主分类号 |
D01D5/098 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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