High-performance thin-wall polypropylene composite material capable of improving mold sticking and preparation method of high-performance thin-wall polypropylene composite material

A composite material and polypropylene technology, which is applied in the field of polymer materials and their processing, can solve the problems of being easily affected by strong flow shear force, unfavorable continuous production of parts, and displacement of material surface, so as to increase the interface bonding force and Compatibility, reduction of odor emission performance, and simple preparation process

CN114369314AActive Publication Date: 2022-04-19CHONGQNG PRET NEW MATERIAL +3
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2022-04-19

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Abstract

The invention discloses a high-performance thin-wall polypropylene composite material with improved mold sticking and a preparation method thereof. The polypropylene composite material comprises the following raw materials in parts by weight: 57-75 parts of polypropylene; 14 to 28 parts of functional talcum powder master batch; 8-17 parts of an elastomer; 0-1 part of an antioxidant; 0-3 parts of other auxiliary agents; the invention has the following advantages: in the formula design of the thin-wall polypropylene composite material, the high-efficiency functional talcum powder master batch is adopted to replace the traditional modified polypropylene formula to directly use talcum powder and an auxiliary agent to prepare the material, and the functional talcum powder master batch takes high-fluidity polypropylene as a carrier; when a polymer system is extruded from a twin-screw or an injection molding machine, the high-mesh talcum powder and the elastomer can be well and uniformly dispersed into a composite material system, and meanwhile, the composite lubricant in the functional talcum powder master batch firstly moves towards the outer side of a material melt and is enriched on the surface layer of the material, so that the lubricating property of the whole material system is improved.
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Description

technical field

[0001] The invention belongs to the technical field of polymer materials and processing thereof, and relates to a mold-improving, high-performance, thin-walled polypropylene composite material and a preparation method thereof. Background technique

[0002] With the rapid development of the automobile industry and the increasingly serious environmental problems, all major automobile manufacturers are committed to research on vehicle lightweight. For the most used polypropylene plastic parts in automobiles, the thin-walled design is favored in the vehicle lightweight technology. At present, the traditional wall thickness of automotive plastic parts used by major automobile manufacturers is 2.5-3.0mm, and the wall thickness will reach 1.8-2.2mm after thin-wall design. After the wall thickness of the part is thinned, in order to ensure that the appearance and performance of the part are not lost, the thin-walled part is a type of material that exhibits typical h...

Examples

Embodiment Construction

[0030] The present invention will be described in detail below in conjunction with specific examples. Unless otherwise specified, each component in the examples is by weight.

[0031] The contents of each component contained in the examples of the present invention and the comparative examples are shown in Table 1.

[0032] Each main component content (mass percentage) in the embodiment and comparative example of table 1

[0033]

[0034]

[0035]The polypropylene described in the examples and comparative examples in the above Table 1 is a copolymerized polypropylene, which is compounded with EP5075X and BX3920 at a ratio of 2:1. The grade EP5075X is produced by Zhongsha Petrochemical, and the melt flow rate is 60g / 10min, the brand BX3920 is produced by SK Company in South Korea, and the melt flow rate is 100g / 10min. The talcum powder is about 10,000 mesh talc powder from Shanghai Yuanjiang Chemical Co., Ltd. The elastomer is a thermoplastic POE elastomer produced by ...