发明名称 |
PROCESS OF MAKING DIMENSIONALLY STABLE NONWOVEN FIBROUS WEBS |
摘要 |
Dimensionally stable nonwoven fibrous webs include a multiplicity of continuous fibers formed from one or more thermoplastic polyesters and polypropylene in an amount greater than 0% and no more than 10% by weight of the web. The webs have at least one dimension which decreases by no greater than 10% in the plane of the web when heated to a temperature above a glass transition temperature of the fibers. A spunbond process may be used to produce substantially continuous fibers that exhibit molecular orientation. A meltblown process may be used to produce discontinuous fibers that do not exhibit molecular orientation. In some embodiments, the fibers comprise a viscosity modifier and/or an anionic surfactant. The webs may be used as articles for filtration, sound absorption, thermal insulation, surface cleaning, cellular growth support, drug delivery, personal hygiene, medical apparel, or wound dressing. |
申请公布号 |
US2014210141(A1) |
申请公布日期 |
2014.07.31 |
申请号 |
US201414231175 |
申请日期 |
2014.03.31 |
申请人 |
3M INNOVATIVE PROPERTIES COMPANY |
发明人 |
Moore Eric M.;Stelter John D.;Berrigan Michael R.;Porbeni Francis E.;Scholz Matthew T.;Landgrebe Kevin D.;Karls Korey W.;Fennessey Sian F.;Jennen Jay M. |
分类号 |
D06M10/00 |
主分类号 |
D06M10/00 |
代理机构 |
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代理人 |
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主权项 |
1. A method of making a web comprising:
forming a mixture comprising:
one or more thermoplastic polyesters selected from aliphatic polyesters and aromatic polyesters,polypropylene in an amount greater than 0% and no more than 10% by weight of the mixture; anda viscosity modifier selected from the group consisting of alkyl carboxylates, alkenyl carboxylates, aralkyl carboxylates, alkylethoxylated carboxylates, aralkylethoxylated carboxylates, alkyl lactylates, alkenyl lactylates, and mixtures thereof simulataneously forming a plurality of fibers from the mixture; and collecting at least a portion of the fibers to form a web, wherein the web has at least one dimension which decreases by no greater than 10% in the plane of the web when the web is heated to a temperature above a glass transition temperature of the fibers but below the melting temperature when measured in an unrestrained condition. |
地址 |
St. Paul MN US |