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Preparation method of polypropylene car bumper

A technology for automobile bumpers and polypropylene, applied to bumpers and other directions, can solve the problems of heat distortion temperature and other performance degradation, high cost, and high rubber consumption, and achieve good overall performance, efficiency improvement, and low cost effects

Inactive Publication Date: 2014-03-19
GUILIN FUGANG NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although rubber such as EPDM (ethylene propylene diene monomer) can effectively toughen PP, there are still many disadvantages: although the impact strength has been improved, the properties such as tensile strength, flexural modulus, and heat distortion temperature have dropped greatly. The dosage is generally higher, resulting in higher cost

Method used

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  • Preparation method of polypropylene car bumper

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Preheat the high-speed mixer to 110°C, add talcum powder, stir at a low speed for 15 minutes, then add titanate coupling agent equal to 2% of the talcum powder in three times, and stir at high speed after each addition of titanate coupling agent 5min, then release the talcum powder;

[0025] Mix PP, PE, POE, talcum powder, and additives in a mass ratio of 40:40:5:5:0.1, (wherein the mass ratio of bismaleimide, antioxidant, and light stabilizer in the additives 0.07:0.001:0.03), after mixing, the adding conditions are heating temperature 190℃~220℃, main screw speed 200r / min, feeding screw speed 20r / min, extruding and granulating in the twin-screw extruder hopper;

[0026] Dry the granulated material and add it to the injection molding machine. The temperature of the injection molding machine is 190°C-210°C, the injection and holding pressure is 5Mpa, the pre-molding pressure is 6Mpa, the injection molding and holding pressure time is 20s, and the total molding cycle is 5...

Embodiment 2

[0028] Preheat the high-speed mixer to 110°C, add talcum powder, stir at a low speed for 15 minutes, then add titanate coupling agent equal to 2% of the talcum powder in three times, and stir at high speed after each addition of titanate coupling agent 5min, then release the talcum powder;

[0029] Mix PP, PE, POE, talcum powder and additives at a mass ratio of 45:45:7.5:7.5:0.25, (the mass ratio of bismaleimide, antioxidant, and light stabilizer in the additives 0.175:0.0025:0.0725), after mixing, the adding conditions are heating temperature 190℃~220℃, main screw speed 200r / min, feeding screw speed 20r / min, extruding and granulating in the twin-screw extruder hopper;

[0030] Dry the granulated material and add it to the injection molding machine. The temperature of the injection molding machine is 190°C-210°C, the injection and holding pressure is 5Mpa, the pre-molding pressure is 6Mpa, the injection molding and holding pressure time is 20s, and the total molding cycle is 5...

Embodiment 3

[0032] Preheat the high-speed mixer to 110°C, add talcum powder, stir at a low speed for 15 minutes, then add titanate coupling agent equal to 2% of the talcum powder in three times, and stir at high speed after each addition of titanate coupling agent 5min, then release the talcum powder;

[0033] Mix PP, PE, POE, talcum powder, and additives in a mass ratio of 50:50:10:10:0.5, (wherein the mass ratio of bismaleimide, antioxidant, and light stabilizer in the additives 0.35:0.005:0.15), after mixing, the adding conditions are heating temperature 190℃~220℃, main screw speed 200r / min, feeding screw speed 20r / min, extruding and granulating in twin-screw extruder hopper;

[0034] Dry the granulated material and add it to the injection molding machine. The temperature of the injection molding machine is 190°C-210°C, the injection and holding pressure is 5Mpa, the pre-molding pressure is 6Mpa, the injection molding and holding pressure time is 20s, and the total molding cycle is 55s...

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Abstract

The invention relates to a preparation method for car parts, and particularly relates to a preparation method of a polypropylene car bumper. The preparation method is as follows: preheating a high speed mixer to 110 DEG C, adding an inorganic filler for low-speed stirring for 15min, adding a coupling agent of 2% of the filler amount in three times, after each time adding of the coupling agent, performing high-speed stirring for 5min, then releasing the inorganic filler; mixing PP (polypropylene), PE (polyethylene), POE (polyolefin elastomer), the inorganic filler and an additive in a mass ratio of 40 ~ 50:, 40 ~ 50:5 ~ 10:5 ~ 10:0.1 ~ 0.5, then adding into a twin-screw extruder hopper for granulation; drying a granulation material, then adding into an injection molding machine for heating and pressure holding, injecting into a car bumper mold, and cooling to separate to obtain the car bumper. The preparation method solves the technical problems by providing a good comprehensive performance, low cost and middle and low level car and light truck special-purpose bumper material prepared by using a small amount of the POE for toughening, the inorganic filler for filling and the like for blending modification.

Description

technical field [0001] The invention relates to a method for preparing auto parts, in particular to a method for preparing a polypropylene automobile bumper. Background technique [0002] Polypropylene (PP) has the advantages of low density, cheap price, good chemical resistance, easy molding and processing, and convenient recycling. Therefore, the amount of polypropylene used in automobiles has been increasing in recent years, and it has become the largest and most developed plastic in automobiles. The fastest breed. [0003] At present, polypropylene modified materials have been widely used to produce bumpers on cars such as cars and light vehicles. There are roughly two production methods for polypropylene automotive bumper special materials: (1) Reactor copolymerization and blending, that is, copolymerization of propylene, ethylene, etc. in the reactor, and simultaneous PP and polypropylene (EPR) etc. Blending, the special material produced by this method has excellent...

Claims

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Application Information

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IPC IPC(8): C08L23/12C08L23/06C08L23/08C08K13/06C08K9/04C08K3/34C08K3/26C08K5/3415C08J3/22B29B9/06B29C47/92B29C45/76B60R19/03B29C48/92
CPCB29C48/92C08L23/12B29B9/06B29C45/76B29C2945/76498B29C2945/76531B29C2948/9258B29C2948/92704B60R19/03C08L23/06C08L2205/03C08L23/0815C08K13/06C08K9/04C08K3/34
Inventor 李春清韦树宝
Owner GUILIN FUGANG NEW MATERIAL
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