Printer Friendly

Uniform crosslinking.

U.S. Patent 8,344,040 (January 1, 2013), "Polyolefin Treatment Process for Uniform Crosslinking," Dehchuan Sun (Taipei, Taiwan).

For many purposes such as stiffness and stability, polyolefins are crosslinked. However, polyolefins are generally nonreactive and difficult to crosslink. Crosslinking often leads to non-uniform reaction resulting in variable and unpredictable properties. Sun produced a polyolefin material with uniform crosslinking by annealing or heating in steps to at least 30 degrees above the melting temperature during or after crosslinking. The material is then cooled to room temperature under an inert gas, and any oxidized surface material removed. The material may be irradiated before heating and the gases removed from the oven using a purge gas. The result is uniform crosslinking not possible by conventional means.
COPYRIGHT 2013 Society of Plastics Engineers, Inc.
No portion of this article can be reproduced without the express written permission from the copyright holder.
Copyright 2013 Gale, Cengage Learning. All rights reserved.

Article Details
Printer friendly Cite/link Email Feedback
Title Annotation:INDUSTRY PATENTS; Dehchuan Sun
Author:Corneliussen, Roger
Publication:Plastics Engineering
Article Type:Brief article
Geographic Code:9TAIW
Date:Apr 1, 2013
Previous Article:Simplified recycling.
Next Article:Strong shape memory materials.

Terms of use | Privacy policy | Copyright © 2019 Farlex, Inc. | Feedback | For webmasters