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细旦多孔聚酯预取向丝Barmag环吹纺丝组件的设计

2021-11-26吴金亮王铁军孙福吴维光张逢书李钊大宋峰

现代纺织技术 2021年6期

吴金亮 王铁军 孙福 吴维光 张逢书 李钊大 宋峰

摘 要:采用Barmag环吹技术熔体直纺生产超细旦纤维,对133.3 dtex/144f细旦多孔聚酯预取向丝(POY)纺丝组件的设计和组装工艺进行了研究。理论和生产实践表明:133.3 dtex/144f品种喷丝板直径为88mm,孔排列成4圈时情况最佳;喷丝板微孔长度为0.15mm 、微孔长径比选择为3.33时比较合适;特殊设计的喷丝板山峰槽导流结构,砂杯、导流板、分配板有效避免了组件内部的死角,增强了熔体的混合效果;当七层滤网规格为700目,搭配60目100 g金属砂和80目200 g金属砂时,组件的上机压力为15.2MPa,上机成功率96.6%,使用周期45 d;实际生产中,组件预热炉温度设定为325℃,预热时间为8 h并恒温4 h,可以满足生产需求。

关键词:细旦多孔;喷丝板;组件压力;金属砂;过滤网

中图分类号: TQ342

文献标志码:A

文章编号:1009-265X(2021)06-0049-06

收稿日期:2020-10-08 網络首发日期:2021-04-15

基金项目:国家重点研发计划专项项目(2016YFB0302703)

作者简介:吴金亮(1976-),男,江西赣州人,高级工程师,主要从事新型纤维材料开发、功能性纤维、差别化纤维、复合纤维方面的研究。

通信作者:王铁军,E-mail:wangtiejun_wtj@163.com

Design of Barmag Ring Blowing Spinning Assembly of FineDenier Porous Polyester Pre-oriented Yarn

WU Jinliang1, WANG Tiejun1, SUN Fu2, WU Weiguang1,ZHANG Fengshu1, LI Zhaoda1, SONG Feng1

(1.Rongsheng Petuochemical Group Co. Ltd., Hangzhou 311247, China;

2.College of Materials and Textiles, Zhejiang Sci-Tech University, Hangzhou 310018, China)

Abstract: An ultrafine denier fiber was produced by melt direct spinning with Barmag ring blowing technology, the design and assembly process of 133.3 dtex/144f fine denier porous polyester pre-oriented yarn (POY) spinning component were studied. The theory and production practice suggest that: the spinning condition is the best when the diameter of the spinneret of the 133.3 dtex/144f POY is 88mm, and the holes are arranged in 4 circles. The condition is suitable when the micropore length of spinneret is 0.15mm and the ratio of micropore length to diameter is 3.33. The specially designed groove diversion structure of spinneret, sand cup, guide plate and distribution plate can effectively avoid dead corners inside the assembly and promote the mixing effect of melt. When the mesh number of the seven-layer filter screen is 700, coupled with 100 g metal sand in mesh #60 and 200 g metal sand in mesh #80, the operating pressure of the assembly is 15.2MPa, the success rate is 97.6%, and the service life is up to 45 d. In practical production, when the preheating temperature is set to 325℃, the preheating time is 8h and the temperature is held for 4h, the production requirements can be met.

Key words: fine denier porous, spinneret, pressure of component; metal sand, filter screen

在熔体直纺的过程中,组件是被称为纺丝心脏的核心部件。经熔体管道输送到箱体的聚酯熔体通过计量泵精确计量后在其内部过滤、撕裂、混合,然后在稳定的压力下挤出成型[1-2]。不同类型的产品需要由不同规格的纺丝组件来实现。生产的品种越高端,对组件的要求就越高。超细旦纤维133.3 dtex/144f是近几年才逐步实现工业化生产的功能性纤维,属于纤维中的高端品种。因此在纺丝过程中,难度远远高于常规的聚酯纤维。……

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