| 热塑性聚氨酯弹性体加强麻醉导管抗拉伸性能的试验研究 |
| Experimental Study on Tensile Resistance of TPU Strengthening Anesthesia Catheter |
| 投稿时间：2022-08-29 修订日期：2022-08-29 |
| DOI：10.12136/j.issn.1000-890X.2024.02.0127 |
| 中文关键词: 热塑性聚氨酯弹性体 加强麻醉导管 挤出成型 抗拉伸性能 |
| 英文关键词: TPU strengthening anesthesia catheter extrusion molding tensile resistance |
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| 中文摘要: |
| 以热塑性聚氨酯弹性体（简称TPU）粒料为原材料、采用挤出成型工艺制备TPU加强麻醉导管（简称TPU导管，指管体），研究TPU粒料性能、口模和芯棒直径、工艺参数对TPU导管抗拉伸性能的影响。结果表明，TPU导管主体管TPU粒料牌号为1195A，加强筋TPU粒料牌号为TT-1055D，口模直径为2.8 mm，芯棒直径为1.7 mm，主体管TPU粒料塑化挤出机（25#挤出机）机筒一区、二区和三区温度分别为195，200和207 ℃，25#挤出机连接件和相应法兰温度分别为195和203 ℃，加强筋TPU粒料塑化挤出机（20#挤出机）机筒一区、二区和三区温度分别为200，210和215 ℃，20#挤出机连接件和相应法兰温度分别为195和200 ℃，机头前模体和后模体的温度分别为195和200 ℃，口模温度为180 ℃，25#和20#挤出机螺杆转速均为 8.5 r·min-1时，外直径为1.0 mm的TPU导管断裂力达到45.75 N，断裂风险低。 |
| 英文摘要: |
| Using thermoplastic polyurethane elastomer（referred to as TPU） particle as raw material and extrusion molding technology，TPU strengthening anesthesia catheter（referred to as TPU catheter，referring to the catheter body） was prepared.The effects of TPU particle properties，mouth mold and core rod diameters and process parameters on the tensile resistance of TPU catheters were studied.The results showed that when the grade of TPU particle for the main body of TPU catheter was 1195A，the grade of TPU particle for the strengthening tendon was TT-1055D，the mouth mold diameter was 2.8 mm，and the core rod diameter was 1.7 mm，the temperatures of the first，second and third zones of the barrel of extruder（25# extruder） for TPU particle plasticization of the main body were respectively 195，200 and 207 ℃，the temperatures of 25# extruder connecting part and corresponding flange were respectively 195 and 203 ℃，the temperatures of the first zone，second zone and third zone of the barrel of extruder（20# extruder） for TPU particle plasticization of the strengthening tendon were respectively 200，210 and 215 ℃，the temperatures of 20# extruder connecting part and corresponding flange were respectively 195 and 200 ℃，the temperatures of the front and rear molds of the machine head were respectively 195 and 200 ℃，the mouth mold temperature was 180 ℃，the screw speeds of 25# and 20#extruders were both 8.5 r · min-1，the fracture force of TPU catheter with an outer diameter of 1.0 mm reached 45.75 N，indicating a low risk of fracture. |
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