Effect of glass fiber and crystallinity on light transmission during laser transmission welding of thermoplastics

被引：29
|
作者：
Xu, Xin Feng [1 ]
Bates, Philip J. [1 ]
Zak, Gene [2 ]
机构：
[1] Royal Mil Coll Canada, Dept Chem & Chem Engn, Kingston, ON K7K 7B4, Canada
[2] Queens Univ, Dept Mech & Mat Engn, Kingston, ON K7L 3N6, Canada
来源：
OPTICS AND LASER TECHNOLOGY | 2015年 / 69卷
基金：
加拿大自然科学与工程研究理事会;
关键词：
Laser transmission welding; Thermoplastics; Absorption coefficient; OPTICAL CHARACTERIZATION;
D O I：
10.1016/j.optlastec.2014.12.025
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
In order to predict and optimize the contour laser transmission welding (LTW) process, it is important to understand how the laser energy behaves during transmission through the transparent part. In this study, transmission measurements were made on unreinforced and glass-fiber-reinforced amorphous and semi-crystalline thermoplastics at different thicknesses. Using the ratio of transmitted power to laser power, apparent absorption coefficients and apparent reflections were calculated. The results indicate that there is a linear relationship between the glass fiber volume fraction and the apparent absorption coefficient of reinforced polymers; similar effects were also observed for crystallinity. A simple model was developed to estimate apparent absorption coefficient of reinforced polymers as a function of composition. The apparent reflection increased with crystallinity due to increased back scattering. However, for glass-fiber-reinforced polymers, the apparent reflection displayed a more complex behavior. Crown Copyright (C) 2014 Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码：133 / 139
页数：7
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