Thermoplastic copolyesters applications

Recent Developments in Thermoplastic Copolyester Elastomers Based Blends and Composites and Their Applications... 

The wholly aromatic copolyester for injection molding is available in filled and unfilled grades. It can be molded into thin-wall components at high speeds. The high melt flow also enables it to be molded into heavy-wall parts. No mold release is required because of the inherent lubricity and nonstick properties. No post-curing is necessary because the material is completely thermoplastic in nature. The material is expected to have many applications because of its moldability and its resistance to high temperatures, fire, and chemicals. 

PBT is also blended with PMMA, PET/PC, and polybntadiene. Another development involving the use of PBT is coextrusion of PBT and copolyester thermoplastic elastomer. This can then be blow molded into under-hood automotive applications, which minimize noise vibration. PBT is suitable for applications requiring dimensional stability. It is particnlarly good in water, and it is also resistant to hydrocarbons oils without stress cracking. To improve PBT s poor notch impact strength, copolymerization with ethylene and vinyl acetate will improve toughness. 

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