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

Toyobo GM-420K01 Crystalline Polyester Resin

Toyobo GM-420K01 is a high-melt-viscosity crystalline polyester resin from Toyobo’s GM series, engineered for precision injection molding and thin-wall packaging applications. It offers excellent thermal stability, rapid crystallization, and superior dimensional accuracy. Widely used in food-grade containers and medical devices, GM-420K01 delivers consistent flow control and low warpage. Its optimized molecular structure ensures reliable processing and high clarity.
  • toyobo gm 420k01 crystalline polyester resin_2d475188
  • toyobo gm 420k01 crystalline polyester resin_2d475188

Features Of Toyobo GM-420K01 Crystalline Polyester Resin

  1. High crystallinity enabling rapid melt solidification and excellent dimensional stability.

  2. Outstanding thermal resistance with continuous use temperature up to 150°C.

  3. Low moisture absorption (<0.2% at 23°C, 50% RH) ensuring consistent processing and end-product reliability.

  4. Excellent chemical resistance to hydrocarbons, aliphatic solvents, and weak acids.

  5. Good flow characteristics for injection molding and extrusion of precision thin-walled components.

Typical Applications Of Toyobo GM-420K01 Crystalline Polyester Resin

  1. Automotive under-hood components including sensor housings and connector bodies.

  2. Electrical and electronic parts such as terminal blocks, relay bases, and coil bobbins.

  3. Industrial fasteners and structural clips requiring high stiffness and creep resistance.

  4. Consumer appliance housings exposed to elevated ambient temperatures.

  5. Food-contact compliant packaging trays (subject to regional regulatory approval).

Specifications Of Toyobo GM-420K01 Crystalline Polyester Resin

Chemical TypeCopolyester (Terephthalate-based crystalline polyester)
Product FormPellets
AppearanceOff-white translucent granules
Melt Temperature (DSC, 10°C/min)258–262°C
Density (ASTM D792)1.32–1.34 g/cm³
Moisture Content (as received)≤0.05 wt%
Primary ApplicationsEngineering thermoplastic parts requiring heat resistance and dimensional fidelity
Key FeaturesCrystalline structure, low warpage, high rigidity, good processability


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