Unique - transparent and crystalline
Commonly available transparent polyamides consist of partly aromatic units that lend high rigidity and heat resistance, as in TROGAMID® T. Substitution of the aromatic components with aliphatic monomers results in transparent polyamides with inherently better UV resistance. TROGAMID® CX compounds belong to this product group.
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.
Combining the advantages of semicrystalline and amorphous molding compounds
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. The outstanding properties of TROGAMID® CX are:
crystal clarity and permanent transparency, with high transmission (92%)
outstanding chemical and stress-cracking resistance
high dynamic strength (number of load cycles)
very 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.
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.
Further information is available in the brochure "TROGAMID CX—premium polyamide grades for optical applications" or from our experts.