发明名称 |
VERFAHREN ZUR HERSTELLUNG VON POLYMERGARNEN AUS ULTRAHOCHMOLEKULAREN HOMOPOLYMEREN ODER COPOLYMEREN, POLYMERGARNE, POLYMERFORMKÖRPER SOWIE VERWENDUNG DER POLYMERGARNE |
摘要 |
<p>A process for the preparation of polymer yarns from ultra high molecular weight homopolymers or copolymers, wherein the process includes the following steps: (a) preparing a suspension of a homopolymer or copolymer and a spinning or gelling solvent of a non polar nature at a weight of homopolymer or copolymer to solvent ratio from 2/98 to 30/70, wherein said ultra high molecular weight homopolymer or copolymer is reactor bimodal or multimodal; (b) feeding said homopolymer or copolymer suspension to an extruder; (c) extruding said suspension under gel forming conditions, at a temperature in excess of 150° C., and under inert conditions; (d) spinning the gel obtained from the extrusion so as to obtain non-stretched filaments with diameters of at least 1 mm, at a temperature in excess of 150° C., while maintaining the inert conditions; (e) cooling the non-stretched filament bundles; (f) treating said non-stretched yarn with a second extraction solvent; (g) drying the non-stretched yarn and (h) stretching the dry yarn.</p> |
申请公布号 |
DE602008004754(D1) |
申请公布日期 |
2011.03.10 |
申请号 |
DE20086004754T |
申请日期 |
2008.04.10 |
申请人 |
BRASKEM S.A. |
发明人 |
DA CUNHA, FERNANDA OLIVEIRA;DO NASCIMENTO, ALAN KARDEC;DE LA RUE, BRENO;BECKEDORF, MARTHA DE LA RUE |
分类号 |
D01F6/04 |
主分类号 |
D01F6/04 |
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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