A high-melt strength impact-resistant polypropylene foam board and its preparation method

A high melt strength, foamed sheet technology, applied in the field of polymer materials, can solve the problems of poor molding ability, cell merger and rupture, low melt strength, etc., and achieve low foaming ratio and dense and uniform cells , the effect of high closed cell rate
CN106317609BActive Publication Date: 2018-09-21CHINA PETROLEUM & CHEM CORP +1
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Patents(China)
Current Assignee / Owner
CHINA PETROLEUM & CHEM CORP
Publication Date
2018-09-21

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Abstract

The invention provides a polypropylene foamed sheet and a preparation method therefor. The foamed sheet is prepared by taking impact-resistant polypropylene with high melt strength as base resin and carrying out foaming and rolling, wherein the impact-resistant polypropylene with high melt strength contains a propylene homopolymer ingredient and an ethylene-1-butylene copolymer ingredient, and the ratio of Mw of room-temperature trichlorobenzene soluble matters of the impact-resistant polypropylene with high melt strength to Mw of room-temperature trichlorobenzene insoluble matters of the impact-resistant polypropylene with high melt strength is greater than 0.5 and smaller than or equal to 1; and the content of room-temperature dimethylbenzene soluble matters in the impact-resistant polypropylene with high melt strength is higher than 10wt% and lower than 30wt%. The polypropylene foamed sheet provided by the invention has the advantages of smooth surface, uniform bubble and pore size distribution, good high- / low-temperature impact resistance, high melt strength and the like and can be extensively applied to the field of automotive parts, food and electronic packages, architectural decoration and the like; and the preparation method for the polypropylene foamed sheet is simple and is easy in operation and low in cost.
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Description

technical field

[0001] The invention relates to the field of polymer materials, in particular to a high-melt strength impact-resistant polypropylene foam board and a preparation method thereof. Background technique

[0002] Foamed sheets are widely used in containers, construction materials, auto parts, and impact energy absorbing materials, among others. Compared with polystyrene foamed sheets, polypropylene (PP) foamed sheets have excellent rigidity and thermal stability, and the demand for them has been increasing in recent years. The extrusion foaming sheet molding method of polypropylene has also received extensive attention. Polypropylene foam sheets and plates are mainly obtained by extrusion foaming method, specifically, the mixing and melting of each foaming component is directly completed in the extruder, and the foaming process is completed by decomposing and overflowing the foaming agent at the head of the machine. . The direct extrusion foaming method is to d...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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