热塑性聚氨酯弹性体薄膜激光透射焊接工艺

刘会霞; 李品; 邢安; 袁晓明; 向宝珍; 王霄

中国激光, 2009, 36 (s1): 156, 网络出版: 2009-06-18

热塑性聚氨酯弹性体薄膜激光透射焊接工艺

Laser Transmission Welding of Thermoplastic Polyurethane Films

论文大纲

刘会霞 ^*李品邢安袁晓明向宝珍王霄

作者单位

江苏大学机械工程学院, 江苏镇江 212013

摘要

为了揭示具有良好生物相容性的医用聚合物材料的连接、封装工艺, 采用激光透射焊接工艺, 对0.12 mm厚热塑性聚氨酯弹性体薄膜(TPU)进行激光焊接, 研究了激光器平均功率、焊接速度等主要工艺参数对焊缝质量的影响。结果表明, 使用Clearweld吸收剂, 焊缝颜色和母材颜色基本一致, 可实现透明对透明材料的无色焊接; 在焊接速度Ｖ＝100 mm/min, 激光器平均功率Ｐ从0.31 Ｗ增加到8.11 W时, 焊缝宽度从0.86 ｍｍ增加到4.10 ｍｍ, 在Ｐ大于2.3 Ｗ时, 焊缝处材料出现分解, 在Ｐ大于7.15 Ｗ时出现烧蚀。但在激光器平均功率Ｐ为0.60～5.89 Ｗ时, 焊缝剥离强度均大于1.3 N/mm。固定激光器平均功率,通过调整焊接速度, 可获得TPU激光透射焊接工艺参数窗口, 表明通过激光器平均功率和焊接速度的匹配, 在保证焊接质量的前提下, 能够为TPU薄膜激光透射焊接选取合理的工艺参数。

Abstract

0.12 mm thick films of thermoplastic polyurethane (TPU) are welded using laser transmission welding technology. The effect of main welding parameters including laser average power, welding speed on welding quality is investigated. The results show that using Clearweld resins, the color of welding seam is similar to parent material’s, and colorless welding is obtained. The experimental results show that at the welding speed of 100 mm/min, with increasing of laser average power from 0.31 W to 8.11 W, the seam width increases from 0.86 mm to 4.10 mm. When the laser average power is lager than 2.30 W, the material is decomposed in the weld seam. When the laser average power is lager than 7.15 W, the material is ablated. And the peeling strength is all more than 1.3 N/mm during the laser average power from 0.6 W to 5.89 W. Adjusting welding speed and fixing the laser average power, parameter window for laser transmission welding is obtained. The results show that with the matching of laser average power and welding speed, the welding speed can be increased by the premise of guarantee of weld seam quality.

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刘会霞, 李品, 邢安, 袁晓明, 向宝珍, 王霄. 热塑性聚氨酯弹性体薄膜激光透射焊接工艺[J]. 中国激光, 2009, 36(s1): 156. Liu Huixia, Li Pin, Xing An, Yuan Xiaoming, Xiang Baozhen, Wang Xiao. Laser Transmission Welding of Thermoplastic Polyurethane Films[J]. Chinese Journal of Lasers, 2009, 36(s1): 156.

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