Low Heat Distortion Properties in Glass filled PET
Low Heat Distortion Properties in Glass filled PET
(OP)
I am making a glass filled PET compound on a twin screw extruder. Properties are good except for an extremely low HDT value of approx 80 C instead of 215 which commercially available grades have. I still get this low number even when I use an alternative grade of PET. Strand length in the compound is good, no excessive breakage.
Does anyone have any ideas on how to improve this property?
Does anyone have any ideas on how to improve this property?





RE: Low Heat Distortion Properties in Glass filled PET
Many beverage bottle compounds are amorphous copolymer.
Are you useing a glass fibre with good aspect ratio and suitable surface coating or sizeing agent
Regards
pat