Thanks to systematic selection of monomers, TROGAMID® CX is a crystallizable and permanently transparent polyamide. The crystallites are so small that they do not scatter visible light. The material thus appears transparent to the human eye, a property known as microcrystallinity.
The microcrystalline structure has the advantage that the positive properties arising from crystallinity, such as stress-cracking resistance, are retained without clouding of the material. The crystalline proportion is so low, however, that it does not negatively impact the shrinkage behavior of the molded part; the isotropic shrinkage behavior observed in amorphous materials is retained in TROGAMID® CX. The material combines the chemical resistance of semicrystalline molding compounds with the advantages of amorphous, UV-resistant molding compounds.
- Crystal clarity and permanent transparency, with high transmission (92%)
- Outstanding chemical and stress-cracking resistance
- High dynamic strength (number of load cycles)
- Hery high toughness, even at low temperatures
- Abrasion resistance and scratch resistance
- Very low isotropic shrinkage
The product range allows a large variety of applications and meets various requirements profiles. Other products, such as colored grades and those offering transparent laser marking, are available on request.
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For optical applications such as lenses for sports glasses and sunglasses, we offer compounds named TROGAMID® myCX of particularly high purity, which are subjected to strict and specially designed quality checks. The refractive index of this material is 1.516.
TROGAMID® CX 7323 - a transparent material alternative for the food industry
The U.S. Food and Drug Administration (FDA) has approved Evonik's microcrystalline polyamide TROGAMID® CX 7323 for food contact.