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Preparation method capable of toughening and reinforcing polypropylene product

A polypropylene and product technology, applied in the field of plastic injection molding product processing, can solve many problems, and achieve the effect of simple components, easy implementation and low cost

Inactive Publication Date: 2014-04-02
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] According to the patent documents checked, there are not many patents on toughened and reinforced polypropylene injection molding products at present.

Method used

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  • Preparation method capable of toughening and reinforcing polypropylene product
  • Preparation method capable of toughening and reinforcing polypropylene product
  • Preparation method capable of toughening and reinforcing polypropylene product

Examples

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Embodiment 1～4

[0023](1) Drying: Dry at 100° C. for 2 hours before use, so that the water content by weight is less than 0.01%. The trade name of β nucleating agent among the present invention is TMB-5, and it is a kind of nucleating agent (Shanxi Provincial Institute of Fine Chemical Industry) of substituted benzamides, and the grade of isotactic polypropylene used is T30s, and its melt index is 3g / 10min (230°C, 21.6N), weight average molecular weight is 39.9×104g / mol, molecular weight distribution is 4.6, (product of Dushanzi Petrochemical Company);

[0024] (2) Pre-mixing: the dried and cooled β-nucleating agent and isotactic polypropylene are stirred and mixed at room temperature according to the weight ratio until the β-nucleating agent is evenly distributed on the surface of the polypropylene. Its specific formula is shown in Table 1;

[0025] (3) Extrusion granulation: put the pre-mixed material in a twin-screw extruder to melt, mix and extrude it, using TSSJ 25 type, twin-screw extr...

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Abstract

The invention discloses a preparation method capable of toughening and reinforcing a polypropylene product. A beta nucleating agent and polypropylene are premixed, then a mixture is extruded and pelletized, and an injection molding shape controller is adopted for preparing a polypropylene spline. A target product has a hard skin layer which contains a height-orientated crystal alpha and no crystal beta and a tough core layer which contains massive crystals beta, and the 'hard-skin tough-core' bamboo-like bionic structure causes the polypropylene material to obtain toughening and strengthening effects. The preparation method disclosed by the invention has the advantages that components are simple, a small quantity of beta nucleating agent is required to be added into isotatic polypropylene, the cost is relatively low, influence on a processing forming process is less and the preparation method is easy to implement.

Description

technical field [0001] The invention relates to the technical field of processing plastic injection molding products, in particular to the technical field of a process for toughening and strengthening polypropylene injection molding products. Background technique [0002] As one of the five general-purpose plastics, isotactic polypropylene (iPP) has abundant sources of raw materials and low prices, and has excellent comprehensive properties, such as good electrical insulation, small dielectric rate, good stress crack resistance, chemical resistance and Excellent mechanical properties, so it is widely used in automobile industry, electrical industry, daily necessities and furniture industry, packaging industry, etc. However, due to the large crystallinity of isotactic polypropylene, the crystal size generated under normal molding processing conditions is relatively large, and there are few connections between crystals, resulting in low impact performance of isotactic polyprop...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/12C08K5/20B29B9/06B29C47/92B29C45/78B29C48/92
CPCB29C48/04B29C48/40B29C48/92B29C2948/9259B29C2948/92704B29C2948/92885B29C2948/92895B29C2948/92904
Inventor 李忠明陈妍慧雷军钟淦基陈晨
Owner SICHUAN UNIV
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