| 留置针连接管双层复合挤出工艺研究 |
| Study on Double-layer Composite Extrusion Process for Indwelling Needle Connecting Tube |
| 投稿时间：2020-10-12 修订日期：2020-10-12 |
| DOI：10.12136/j.issn.1000-890X.2022.05.0374 |
| 中文关键词: 留置针连接管 双层复合挤出 工艺参数 热塑性聚氨酯弹性体 聚氯乙烯 正交试验法 |
| 英文关键词: indwelling needle connecting tube double layer composite extrusion process parameter TPU PVC orthogonal test method |
| 基金项目: |
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| 摘要点击次数: 1431 |
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| 中文摘要: |
| 采用热塑性聚氨酯弹性体（TPU）和聚氯乙烯（PVC）两种原材料（粒料），对留置针连接管进行双层复合挤出工艺研究。结果表明：由正交试验法确定的留置针连接管双层复合挤出的最佳工艺参数为TPU挤出输送段（一区）、熔融段（二区）、计量段（三区）、法兰和模具温度分别为170，173，180，178和178 ℃，挤出主机速度为15. 0 r·min-1，牵引速度（牵引裁切机转速）为18 r·min-1；PVC挤出一区、二区、三区和法兰温度分别为168，170，175和173 ℃，挤出主机速度为15. 0r·min-1，牵引速度为18 r·min-1。在最佳工艺参数条件下连续试生产留置针连接管8 h，抽检产品外直径的正态分析结果表明留置针连接管的双层复合挤出工艺稳定。 |
| 英文摘要: |
| The double-layer composite extrusion process of the indwelling needle connecting tube was studied by using thermoplastic polyurethane elastomer（TPU） and polyvinyl chloride（PVC） as raw material（pellets）.The results showed that，the optimum process parameters of the double-layer composite extrusion determined by orthogonal test were that the temperatures of TPU extrusion conveying section（zone 1），melting section（zone 2），metering section（zone 3），flange and die were 170，173，180，178 and 178 ℃ respectively，the speed of extrusion host was 15. 0 r·min-1，and the traction speed（traction cutting machine speed） was 18 r·min-1. The temperatures of PVC extrusion zone 1，zone 2，zone 3 and flange were 168，170，175 and 173 ℃ respectively，the speed of extrusion host was 15. 0 r·min-1 and the traction speed was 18 r·min-1. Under the optimum process parameters，the indwelling needle connecting tubes were continuously produced for 8 h，and the normal analysis results of the outer diameters of the sampled products showed that the double-layer composite extrusion process of the indwelling needle connecting tube was stable. |
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