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Paper Abstract and Keywords
Presentation 2011-12-22 14:15
A Hypothesis on the Mechanism of Ultrasonic Plastic Joining
Kazunari Adachi (Yamagata Univ.) US2011-80
Abstract (in Japanese) (See Japanese page) 
(in English) Ultrasonic plastic joining is an excellent fabrication technique widely used in various industries, most typically, such as automobile industry. Nevertheless, the joining mechanism has not been clarified yet, and further development and exploitation of this technique has thus been hampered. It used to be believed that the ultrasonically generated heat at the joining interface between the plastic parts welds them, but recent studies reveals that the mechanism of ultrasonic plastic joining cannot be attributed to such heat-sealing effect. In the present paper, first shown are the results of the authors’previous research on physical characteristics of VLDPE ( very low density polyethylene ) and PET ( polyethylene-terephthalate) films of 0.1 mm thickness joined by torsional ultrasonic vibration, which well demonstrate that the ultrasonic joining is quite different from heat-sealing. Secondly, the authors show the phenomenon that the PET films are not joined at all by the torsional ultrasonic vibration when the initial temperature of the specimens is over the glass transition temperature (Tg) and under the re-crystallization temperature of the material. Lastly, a hypothesis on the mechanism of ultrasonic joining based on those facts is proposed.
Keyword (in Japanese) (See Japanese page) 
(in English) ultrasonic plastic joining / glass transition temperature / re-crystallization temperature / / / / /  
Reference Info. IEICE Tech. Rep., vol. 111, no. 370, US2011-80, pp. 19-24, Dec. 2011.
Paper # US2011-80 
Date of Issue 2011-12-15 (US) 
ISSN Print edition: ISSN 0913-5685    Online edition: ISSN 2432-6380
Copyright
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reproduction
All rights are reserved and no part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopy, recording, or any information storage and retrieval system, without permission in writing from the publisher. Notwithstanding, instructors are permitted to photocopy isolated articles for noncommercial classroom use without fee. (License No.: 10GA0019/12GB0052/13GB0056/17GB0034/18GB0034)
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Conference Information
Committee US  
Conference Date 2011-12-22 - 2011-12-22 
Place (in Japanese) (See Japanese page) 
Place (in English) Suzukakedai Campus, Tokyo Institute of Technology 
Topics (in Japanese) (See Japanese page) 
Topics (in English) High Power Ultrasound 
Paper Information
Registration To US 
Conference Code 2011-12-US 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) A Hypothesis on the Mechanism of Ultrasonic Plastic Joining 
Sub Title (in English)  
Keyword(1) ultrasonic plastic joining  
Keyword(2) glass transition temperature  
Keyword(3) re-crystallization temperature  
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1st Author's Name Kazunari Adachi  
1st Author's Affiliation Yamagata University (Yamagata Univ.)
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Date Time 2011-12-22 14:15:00 
Presentation Time 25 minutes 
Registration for US 
Paper # US2011-80 
Volume (vol) vol.111 
Number (no) no.370 
Page pp.19-24 
#Pages
Date of Issue 2011-12-15 (US) 


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