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PTT, sold under the trade name CORTERRA®, is a thermoplastic polymer made from two feedstocks: 1,3-propanediol (PDO) and purified terephthalic acid (PTA). It can be processed into fiber or thread for the textile or plastics market. CORTERRA® combines the best proprerties of nylon and polyester: it is softer, stretchier, fade-resistant, easy-clean and quick-drying. A Shell Chemicals Canada affiliate working with Zimmer AG developed PTT in its present form in the 1990s and also the production technology for spinning PTT.
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