TPIs granules can be either amorphous or semi-crystalline thermoplastics. In general, TPI can be injection molded, extruded and recycled. TPIs have high rigidity, excellent creep resistance and low thermal expansion. In addition, TPI has high electrical breakdown strength and excellent radiation resistance. TPI is suitable for designing thin walls and complex shapes with high dimensional stability. TPI is generally lighter than metal or steel materials.
TPI is mainly used in aerospace, as well as in the electrical industry. TPI's applications include wire and cable insulation, high performance connectors and accessories, on-road and off-highway gearing washers and gaskets, semiconductor plasma chamber components and containment systems, jet engine components, high temperature films, bearing cages, gears, diaphragms, stickshapes, and composites.
BIEGLO offers different TPI granules, amorphous and semi-crystalline, for variety of applications under its own brand “Dexnyl”:
• DexnylTM 185 TPI-Granules
• DexnylTM 240 TPI-Granules
DexnylTM 240 TPI granules are amorphous TPI with glass transition temperature of 240ºC. They can be processed using conventional injection molding or extrusion and exhibit super high heat resistance for demanding applications. The main features and application fields of these TPI are:
• Suitable for ultra-high temperature, high pressure, compartment temperatures, insulation, and high friction applications
• To produce self-lubricant and wear resistance parts for high temperatures
• High temperature bearing cages, seal rings, gaskets, compressor parts, etc.
• To produce non-toxic fire-retardant products
DexnylTM 185 TPI is a semi-crystalline TPI which has lower heat resistance (glass transition temperature of 185 °C) than Dexnyl 240 TPI but remarkably lower water absorption that gives it a high level of dimensional stability. This material has mechanical properties quite similar to PEEK at room temperature and higher than PEEK above 130 °C. It is suitable for injection molding and extrusion of parts. Unlike PEEK, injection molded parts do not need to be subjected to further annealing process. The main features and application fields of this TPI are:
• complex-shape elements such as small screw, cap, etc. due to the material’s good melt flow as it has crystalline (crystallinity: approx.20%)
• high strength parts for elevated service temperatures (mechanical properties higher than PEEK at temperatures above 120 °C)
• insulating element due to its excellent dielectric and thermal properties
• high strength and heat resistance gears and bearings
• parts with high dimensional stability due to the material’s low water absorption
• high strength parts with up to 50% filler content