发明名称 |
Process of making a nonwoven web |
摘要 |
A melt-extrudable thermoplastic polypropylene composition having a melt flow rate in a range of from about 18 to about 30 g/10 minutes at a temperature of 190 DEG C. and a load of 2.16 kg, a polydispersity less than 4, and a Z-average molecular weight greater than 300,000 as determined by differential refractometry. The composition may include a first thermoplastic polypropylene having a melt flow rate lower than 18 g/10 minutes at a temperature of 190 DEG C. and a load of 2.16 kg and a second thermoplastic polypropylene having a melt flow rate higher than 18 g/10 minutes at a temperature of 190 DEG C. and a load of 2.16 kg. The weight ratio of the first polypropylene to the second polypropylene is in a range of from about 90:10 to about 10:90. The composition may include from about 0.1 to about 1 percent by weight, based on the weight of the first and second thermoplastic polypropylenes, of a defined alkyl-substituted polysiloxane. A method of forming a nonwoven web also is provided, which method involves compounding the melt-extrudable thermoplastic polypropylene composition composed of a first and second thermoplastic polypropylene as described above. The compounded thermoplastic composition is melt-extruded through a die to form continuous fibers. The continuous fibers are quenched to a solid state, drawn or attenuated, and randomly deposited on a moving foraminous surface as a web of entangled fibers. The composition may include the alkyl-substituted polysiloxane.
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申请公布号 |
US5667750(A) |
申请公布日期 |
1997.09.16 |
申请号 |
US19960601458 |
申请日期 |
1996.02.14 |
申请人 |
KIMBERLY-CLARK CORPORATION |
发明人 |
NOHR, RONALD SINCLAIR;MACDONALD, JOHN GAVIN;KOBYLIVKER, PETER MICHELOVICH |
分类号 |
B32B5/26;B32B27/28;C08L23/10;C08L23/12;C08L83/04;D01F6/46;D04H3/16;(IPC1-7):D01D5/098;D01F1/10 |
主分类号 |
B32B5/26 |
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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