Polypropylene composition for automobile bumper and preparation method thereof
A technology of polypropylene composition and automobile bumper, which is applied in the field of automobile bumper materials, can solve the problems of small shrinkage, high cost, and large deformation, and achieve the effects of good size matching, high dimensional stability, and moderate cost
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[0022] Examples 1~5
[0023] Weigh the materials according to the components and proportions provided in Table 1, mix them in a high-speed mixer for 15 minutes, control the temperature at 60-70°C, and then extrude them in a twin-screw extruder to obtain the composition. The extrusion temperature of each stage was set to 195°C, 205°C, 215°C, 215°C, 215°C, 215°C, 225°C.
[0024] The test results are shown in Table 2.
[0025] It can be seen from Table 2 that according to the appropriate composition ratio and appropriate processing technology, it is possible to prepare automobile bumper materials that meet the needs of various automobile manufacturers. The amount of talc added is 10%, 15% , 20% distinction. Correspondingly, if you need to meet the requirements of the bumper material, you need to adjust the amount of elastomer appropriately so that the impact performance of the bumper material can be guaranteed.
[0026] In order to ensure the molding and processing performance of the bu...
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[0032] Examples 6-9
[0033] Weigh the materials according to the components and proportions provided in Table 3, mix them in a high-speed mixer for 15 minutes, control the temperature at 60-70°C, and then extrude them in a twin-screw extruder to obtain the composition. The extrusion temperature of each stage was set to 195°C, 205°C, 215°C, 215°C, 15°C, 215°C, and 225°C.
[0034] The test results are shown in Table 4.
[0035] The added talcum powder has an impact on the performance of the bumper. Because of its small particle size, the superfine talc powder does not change the resin chain structure very much in the dendritic matrix, so it has an impact on the resin’s elongation at break and impact performance. It is smaller than ordinary talc, and because ultra-fine talc can promote the recrystallization of the resin, it has a good effect on improving the rigidity of the resin, etc. It is obvious from the test results that we can use ultra-fine talc to prepare Mid-to-high-end car ...
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[0043] Example 10
[0044] Weigh the materials according to the following weight ratio: polypropylene resin 50%, wollastonite and chopped glass fiber (weight ratio 1:1) total 25%, toughening agent thermoplastic polyurethane 25%, coupling agent γ-methacrylic acid acrylic Ester-based silane 0.5%, antioxidant 3001%, lubricant calcium stearate and EBS (weight ratio 1:3) total 1%; mix in a high-speed mixer for 15 minutes, control the temperature at 60~70℃, and then The composition is obtained after extrusion by a twin screw extruder. The extrusion temperature of each stage was set to 195°C, 205°C, 215°C, 215°C, 15°C, 215°C, and 225°C.
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