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Home > News > Chemicals

Eastman and Lubrizol collaborate on TPE overmolding adhesion

Source:Adsale Plastics Network Date :2024-06-04 Editor :VC
Copyright: This article was originally written/edited by Adsale Plastics Network (AdsaleCPRJ.com), republishing and excerpting are not allowed without permission. For any copyright infringement, we will pursue legal liability in accordance with the law.

Eastman and Lubrizol have successfully partnered on improving adhesion strength of thermoplastic elastomers (TPEs) overmolded onto Eastman Tritan copolyester TX1501HF.

 

The collaboration stemmed from a mutual recognition of overmolding's importance in manufacturing while delivering improved product performance and aesthetics in consumer goods when using Eastman’s sustainable material, Tritan Renew, and Lubrizol’s ESTANE ECO, renewably sourced TPU.

 

The companies researched how specific processing variables impact the adhesion strength of overmolded samples produced through 2K injection molding. The study’s findings are believed to be applicable across various TPE and substrate combinations.

 

This is of particular interest when mechanical interlocks cannot be used, and material changes are not feasible but improvements in adhesion strengths are desired.


Lubrizol_480.jpg

Eastman and Lubrizol collaborate to investigate how TPE processing variables impact overmolded product strength. 

Optimizing TPE processing variables

 

By optimizing key TPE processing variables like mold temperature, pack and hold time, and TPE barrel temperature, the research team achieved a notable 124% improvement in adhesion strength compared to values obtained using non-ideal processing conditions.

 

An additional improvement in adhesion strength was observed when Lubrizol’s ESTANE ECO 12T80E and 16T85 TPU grades were used. These grades displayed the highest peel strength values (> 310 N) of all TPEs evaluated in this preliminary study.

 

This was a unique opportunity for two leading material companies to leverage sustainable multi-material solutions. The findings open doors for new and innovative product designs, particularly when using recycled content.


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thermoplastic elastomer (TPE)
Lubrizol
Eastman
 Fujian Hairun Zhiyuan Polymer Co.,LTD      

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