Guangzhou Eric Wei Chemical Co., Ltd.
Guangzhou Eric Wei Chemical Co., Ltd.

Toyobo GM-990 Crystalline Polyester Resin

Toyobo GM-990 is a high-purity crystalline polyester resin from Toyobo’s GM series, engineered for superior thermal stability, precise melt viscosity control, and excellent chemical resistance—ideal for high-performance powder coatings, engineering plastics, and specialty adhesives requiring consistent crystallinity and rapid curing.
  • toyobo gm 990 crystalline polyester resin_6a35ecf7
  • toyobo gm 990 crystalline polyester resin_6a35ecf7

Features Of Toyobo GM-990 Crystalline Polyester Resin

  1. High crystallinity enabling rapid solid-state polymerization and excellent melt stability.

  2. Outstanding thermal resistance with decomposition onset above 380 °C under nitrogen atmosphere.

  3. Low inherent viscosity drift during storage, ensuring consistent processing behavior over time.

  4. Excellent compatibility with common nucleating agents and reinforcing fillers for engineered composites.

  5. Controlled hydrolytic stability suitable for moisture-sensitive extrusion and injection molding processes.

Typical Applications Of Toyobo GM-990 Crystalline Polyester Resin

  1. High-performance engineering thermoplastics for automotive under-hood components.

  2. Electrical insulation parts requiring long-term thermal endurance (e.g., connectors, housings).

  3. Durability-critical industrial gears and bearing cages.

  4. Food-contact compliant packaging trays requiring high rigidity and heat resistance.

  5. Specialty fibers for technical textiles demanding dimensional stability at elevated temperatures.

Specifications Of Toyobo GM-990 Crystalline Polyester Resin

Chemical TypeCopolyester based on terephthalic acid, ethylene glycol, and controlled crystallinity modifiers
Product FormPellets
AppearanceOff-white to pale yellow, semi-crystalline granules
Melt Temperature (DSC, 10 °C/min)252–256 °C
Crystallinity (XRD)42–46 wt%
Inherent Viscosity (0.5 g/dL in HFIP)0.78–0.82 dL/g
Moisture Content (ASTM D6869)≤0.05 wt%
Residual Acetaldehyde (GC)≤1.2 ppm


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