发明名称 |
Elektretartikel und Filter mit erhöhter Beständigkeit gegen ölhaltigen Nebel |
摘要 |
The electret article comprises a polymer (1) and a performance enhancing chemical (2) wherein the article has a thermally stimulated discharge current (TSDC) spectrum having a peak with a width at half-height of less than 30[deg]C by test procedure 3. Independent claims are also included for the following: (a) a non-woven web containing the electret article as melt blown fibres; (b) the electret filter comprising the non-woven web of melt blown fibres and has an initial DOP penetration of less than 5% and an average 'minium at challenge' of above 200 mg by DOP filter web loading test procedure 1; (c) a respirator containing an electret filter comprising a non-woven web comprising (1) and (2); a support structure and cup-like member to fit over the mouth and nose; and which has a 'minimum at challenge' of over 400 mg DOP and has an exposed surface area of about 180 cm 2>; (d) an intermediate composition for making an electret filter comprising the non-woven fibrous web comprising polypropylene with a crystallinity index of less than 0.3 and (2) and has a charge density of 10 mC / m 2>;. |
申请公布号 |
DE69837864(T2) |
申请公布日期 |
2008.12.24 |
申请号 |
DE1998637864T |
申请日期 |
1998.01.26 |
申请人 |
MINNESOTA MINING AND MANUFACTURING COMPANY |
发明人 |
ROUSSEAU, ALAN D.;JONES, MARVIN E.;MEI, BETTY Z. |
分类号 |
B01D39/08;B01D39/16;A62B23/00;A62B23/02;B01D39/14;B03C3/28;D01F1/10;D01F6/06;D01F6/46;D01F8/06;D04H1/42;D04H1/56;D06M10/02;D06M13/02;D06M13/322;D06M13/418;D06M15/227;H01G7/02 |
主分类号 |
B01D39/08 |
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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