| Study on One Step Melt Direct Spinning Process of High Tenacity Nylon 66 Industry Yarn |
| Received:June 20, 2018 Revised:June 20, 2018 |
| DOI：10.12136/j.issn.1000-890X.2019.03.0221 |
| Key Words: nylon 66 industry yarn；high tenacity；melt direct spinning process；one step continuous polymerization；high viscosity polymer |
| Author Name | Affiliation | E-mail | | XIE Qiaoli* | Shenma Industrial Co. ，Ltd | xieqiaoli7879@163.com | | XUE Shan | Shenma Industrial Co. ，Ltd | |
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| Abstract: |
| The one step melt spinning process of high tenacity nylon 66 industry yarn was investigated. The relative viscosity of the nylon 66 polymer increased to 83～85 by stepwise upgrading of the polymerization section. The spinning process parameters optimized were as follows：spinning box temperature （300±1） ℃，quenching air temperature 15 ℃，quenching air speed 0.9～1.1 m·s-1，oil loading rate （1.6±0.2）%，draw temperature 190～195 ℃，and draw ratio 5.85～5.95. The tenacity of nylon 66 industry yarn reached 91.93 cN·tex-1. |
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