Description

Polytrimethylene Terephthalate Resins (CAS NO 26590-75-0) are high-performance thermoplastic polymers derived from 1,3-propanediol and terephthalic acid. This material matters for its unique combination of properties, including excellent resilience, inherent stain resistance, and superior elastic recovery compared to other polyesters. It is primarily needed by manufacturers in the textile, packaging, and engineering plastics industries seeking durable and sustainable material solutions.

Application

• Textile Fibers (PTT Fibers): For high-end carpets, apparel, and activewear due to its excellent stretch recovery, softness, and dyeability.
• Engineering Plastics: Used in injection-molded components requiring good dimensional stability, chemical resistance, and mechanical strength.
• Packaging Films: For specialty films and containers where gas barrier properties and clarity are beneficial.
• Monofilaments: In industrial applications such as bristles, ropes, and sewing threads.
• Non-Woven Fabrics: For durable geotextiles, filters, and hygiene products.
• 3D Printing Filaments: As a specialty filament offering good layer adhesion and mechanical properties for functional prototypes.

Basic Information

Product Name	Polytrimethylene Terephthalate Resins
CAS No.	26590-75-0
Molecular Formula	(C11H10O4)n
Molecular Weight	~ 206.19 (monomer unit)
Synonyms	PTT; Poly(trimethylene terephthalate); Poly(oxy-1,3-propanediyloxycarbonyl-1,4-phenylenecarbonyl); 3GT; Sorona® (trade name); Corterra® (trade name); Poly(1,3-propylene terephthalate); 1,3-Propanediol, polymer with terephthalic acid
EINECS	Contact for details

Quality Control

Our Polytrimethylene Terephthalate Resins are manufactured under a strict quality management system. Each batch undergoes rigorous testing for key parameters such as intrinsic viscosity (IV), melting point, color, and thermal stability to ensure consistency and performance for your application. Certificates of Analysis (COA) documenting these specifications are available upon request.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at room temperature (15-25°C). Keep away from strong heat sources and open flames. The material is hygroscopic (moisture-sensitive); ensure containers are sealed after use to prevent moisture absorption which can affect processing.

Specification

Item	Specification
Appearance	White or off-white pellets / chips
Intrinsic Viscosity (IV)	0.80 - 1.20 dL/g (Grade dependent)
Melting Point (DSC)	225 - 230 °C
Color (L* value)	> 80
Moisture Content	< 0.05 %
Carboxyl End Group (CEG)	< 30 meq/kg
Density	~1.35 g/cm³

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.