Automobile sound insulation pad and preparation method thereof
A technology for automobile sound insulation pads and sound insulation layers, which is applied in vehicle parts, transportation and packaging, etc., can solve the problems of exposed fiber felt, strong smell of fiber felt, and easy pollution of the environment, and achieves improved strength and toughness, low mold shrinkage, and low mold shrinkage. Good sound absorption effect
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[0026] Example 1
[0027] S1, weigh 60 parts of PC resin, 39.5 parts of ABS resin, 5.5 parts of nano-silica, 0.55 part of dioctadecyl alcohol pentaerythritol diphosphite, 0.55 part of fatty acid amide, the relative molecular weight of the PC resin is 17000g / mol, the glass transition temperature is 140℃;
[0028] S2, disperse nano-silicon dioxide in pure water through ultrasonic vibration equipment to form inorganic nano-particle dispersion;
[0029] S3, the dispersion liquid obtained in step S2 is injected into the twin-screw extruder through the liquid feed pump, and blended with the ABS resin, and the water is all evaporated and the mixture formed by the inorganic nanoparticles and the ABS resin is left;
[0030] S4, adding the mixture obtained in step S3, PC resin, dioctadecyl alcohol pentaerythritol diphosphite and fatty acid amide into a mixing mixer for mixing, and blending and granulating by a twin-screw extruder, and the barrel temperature is 210 ° C , the screw spe...
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[0039] Example 2
[0040] S1, weigh 60 parts of PC resin, 39.5 parts of ABS resin, 5.5 parts of nano-silica, 0.55 part of dioctadecyl alcohol pentaerythritol diphosphite, 0.55 part of fatty acid amide, the relative molecular weight of the PC resin is 30000g / mol, the glass transition temperature is 150℃;
[0041] S2, disperse nano-silicon dioxide in pure water through ultrasonic vibration equipment to form inorganic nano-particle dispersion;
[0042] S3, the dispersion liquid obtained in step S2 is injected into the twin-screw extruder through the liquid feed pump, and blended with the ABS resin, and the water is all evaporated and the mixture formed by the inorganic nanoparticles and the ABS resin is left;
[0043] S4, adding the mixture obtained in step S3 and PC resin, dioctadecyl alcohol pentaerythritol diphosphite and fatty acid amide into the mixing mixer for mixing, and blending and granulating by twin-screw extruder, and the barrel temperature is 210~ 290℃, the screw...
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