Preparation method of PP/SEBS suitable for rapid molding
A fast, composite material technology, applied in the direction of additive processing, etc., to achieve the effect of low hardness, improved weather resistance, and simple process
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Embodiment 1
[0027] Be applicable to the preparation method of the PP / SEBS composite material of rapid prototyping, adopt following steps:
[0028] (1) 27 parts (weight ratio, the same below) of polypropylene T30S, 35 parts of thermoplastic elastomer SEBS YH503, 35 parts of #70 white oil, 2 parts of antioxidant 1024, and 1 part of brominated styrene.
[0029] (2) Weigh each material according to the ratio in (1), and mix it in a high-speed kneader for 3-10 minutes to obtain a premix;
[0030] (3) Place the premix obtained in (2) in a twin-screw extruder for extrusion and drawing. The temperature of the twin-screw extruder is set as follows: 175°C, 178°C, 180°C, 185°C, 190°C, 200°C ℃, 205℃, die head temperature 210℃, screw aspect ratio greater than 32, screw rotation speed 150-180r / min, feeding speed 10-15r / min.
[0031] The obtained material has a Shore hardness (A) of 75, a tensile strength at break of 6.8 MPa, and an ultimate elongation of 300%, and has good rapid prototyping fluency an...
Embodiment 2
[0033] Be applicable to the preparation method of the modified polylactic acid composite material of rapid prototyping, adopt following steps:
[0034] (1) 30 parts (weight ratio, the same below) of polypropylene T30S, 25 parts of thermoplastic elastomer SEBS YH503, 40 parts of #100 white oil, 3 parts of antioxidant DSTP, 2 parts of decabromodiphenyl ether.
[0035] (2) Weigh each material according to the ratio in (1), and mix it in a high-speed kneader for 3-10 minutes to obtain a premix;
[0036] (3) Place the premix obtained in (2) in a twin-screw extruder for extrusion and drawing. The temperature of the twin-screw extruder is set as follows: 175°C, 178°C, 180°C, 185°C, 190°C, 200°C ℃, 205℃, die head temperature 210℃, screw aspect ratio greater than 32, screw rotation speed 150-180r / min, feeding speed 10-15r / min.
[0037] The obtained material has a Shore hardness (A) of 45, a tensile strength at break of 5.6 MPa, and an ultimate elongation of 300%, and has good rapid pr...
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