Glass fiber-reinforced PBT/PET (Polybutylece Terephthalate/Polyethyleneglycol Terephthalate) composite material and preparation method thereof
A glass fiber and composite material technology, which is applied in the field of glass fiber reinforced PBT/PET composite material and its preparation, can solve the problems of dilemma in polyester market sales and large warpage deformation, and achieve the effect of reducing warpage rate and improving performance.
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[0059] The preparation method of glass fiber reinforced PBT / PET composite material comprises the steps:
[0060] 1) Add PBT, PET, low-shrinkage polymer fillers, and tougheners to a high-speed mixer, drop in process dispersion oil, and mix for 5-10 minutes;
[0061] 2) Add the additive into the high-speed mixer, and mix with the mixture obtained in step 1) in the high-speed mixer for 5-10 minutes to obtain the blended material;
[0062] 3) Put the blended material into the twin-screw extruder, mix well, and melt extrude at the temperature of 180°C-290°C, the aspect ratio of the twin-screw is 36-56, and the speed of the main engine is 100-600rpm; at the same time, it is fed on the side The feed port is filled with glass fiber;
Embodiment 1
[0064] The specific preparation steps of the glass fiber reinforced PBT / PET composite material of embodiment 1 are as follows:
[0065]1) PBT 30kg, PET 19.5kg, low shrinkage polymer filler acrylonitrile-styrene-acrylic rubber copolymer ASA (LG LI-912) 10kg, toughener glycidyl methacrylate grafted POE (grafted (0.9%) (Bondyram 7103) 5kg, compatibilizer maleic anhydride grafted ABS (grafting rate 1.5%) (TRD-150) 5kg into the high-speed mixer, drop into the dispersing oil, mix for 5-10 minutes;
[0066] 2) Add 10980.2 kg of hindered amine antioxidant and 0.3 kg of lubricant montan ester wax into a high-speed blender, and mix with the mixture obtained in step 1) in a high-speed blender for 5-10 minutes to obtain a blended material;
[0067] 3) Put the blended material obtained in step 2 into a twin-screw extruder, mix well, and melt extrude at a temperature of 180°C-230°C, a twin-screw length-to-diameter ratio of 44, and a host speed of 250rpm; Add alkali-free chopped glass fiber...
Embodiment 2
[0070] The specific preparation steps of embodiment 2 glass fiber reinforced PBT / PET composite material are as follows:
[0071] 1) PBT 26kg, PET 15.5kg, low shrinkage polymer filler ABS (121H) 20kg, toughening agent maleic anhydride grafted EPDM (grafting rate 1.5%) (TRD-358EP) 10kg, compatibilizer methyl Glycidyl acrylate graft grafted ABS (grafting rate 10%) (TRD-1100) 8kg was added to the high-speed mixer, after the dispersion oil was dropped, mixed for 5-10 minutes;
[0072] 2) Add 10760.2kg of hindered phenolic antioxidant and 0.3kg of lubricant ethylene bisstearic acid amide into a high-speed blender, and mix with the mixture obtained in step 1) in a high-speed blender for 5-10 minutes to obtain a blend materials;
[0073] 3) Put the blended material obtained in step 2 into a twin-screw extruder, mix well, and melt extrude at a temperature of 180°C-230°C, a twin-screw length-to-diameter ratio of 44, and a host speed of 250rpm; Add alkali-free chopped glass fiber to th...
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