Heavy-Metal-Free Polyester Chip

What is the heavy-metal-free polyester chip ?

A polyester chip*1 that does not contain any heavy metal*2 (antimony-free) and comprises a titanium-based catalyst developed using Teijin's unique technology.



Examples of applications

 Pet goods
 Food packages
 Medical devices


 Safety   The chip does not contain any antimony-based catalyst*3 (listed as a substance
               subject to the regulations by Japan's PRTR Law) , which is commonly used for
               textile polyesters.
               No harmful heavy metals are eluted even in post-processing steps such as dying and
               alkali volume reduction.
               The component catalyst does not dissolve even when the chip comes in contact
               with food etc.

 Increased productivity    Deposition of foreign matter around the socket is minimized to
                                      lenghthen the interval of cleaning work several folds.

 Quality improvements    The chip is effective not only in improving polyester dyeability,
                                      but also in improving yarn processability.

 Environmental load reduction    The metal content ratio is low at one-tenth of that of
                                                antimony catalyst, thus reducing the amount of metal
                                                contained in the finished product.

Polymer products lineup

Example specifications

Remarks IV DEG MP
[dl/g] [wt%] [℃]
Regular type Super-bright 0.65 0.8 256
Copolymer type Low melting point 0.65 - 220
0.65 0.8 230
Easy bonding 0.63 - 150
*These physical properties may be adjusted to meet your demand.

*1: This chip is patented for Teijin's unique technology.
*2: A heavy metal is defined as a metal having a specific gravity of 5 or more.
*3: Diantimony trioxide is used as an antimony-based catalyst, and listed as a Substance to
     Undergo an Extensive Risk Assessment, specified by Japan's Ministry of Health, Labor and
     Welfare as of FY2011.


Raw Materials & Polymers Business Planning and Sales Department, Teijin Ltd.
E-mail: gekie@teijin.co.jp

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