Polypropylene resin foam concentrate and preparation method thereof

A polypropylene resin and foaming masterbatch technology, applied in the field of polypropylene resin foaming masterbatch and its preparation, can solve the problems of unsuitable polypropylene foaming molding, complex masterbatch production process, large equipment investment and the like, and achieve molecular weight The effect of smaller, lower crystallinity, higher melt strength
CN102604223AActive Publication Date: 2012-07-25上海萍青工贸有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
上海萍青工贸有限公司
Publication Date
2012-07-25

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Abstract

The invention relates to a polypropylene resin foam concentrate and a preparation method thereof. The foam concentrate is prepared by taking irradiation modified polypropylene resins as basic raw materials through the steps of adding additives such as a chemical foaming agent, a nucleating agent and a lubricant and the like into the basic raw materials, and uniformly mixing the mixture in a high-speed mixer; and then, adding the obtained mixture into a tandem extruder to carry out extrusion and granulation, thereby obtaining the polypropylene resin foam concentrate. The polypropylene resin foam concentrate provided by the invention can be applied to the extrusion of polypropylene foamed sheets, foamed pipes and foamed profiles; the polypropylene resin foam concentrate is high in modulus of foaming products, good in heat resistance, uniform in foaming hole, and adjustable in density, thereby opening up a new way for the extrusion and foaming of polypropylenes.
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Description

[0001] technical field

[0002] The invention relates to a polypropylene resin foaming masterbatch and a preparation method thereof. More specifically, the invention relates to a method for manufacturing a polypropylene resin foaming masterbatch through a two-stage extruder.

[0003] Background technique

[0004] Polypropylene (PP) is widely used in various fields due to its heat resistance, chemical stability and environmental protection. Some developed countries are vigorously developing polypropylene foam materials.

[0005] Polypropylene extrusion foaming is generally foamed by physical and chemical methods. Chemical foaming is to add chemical foaming agent and other additives to polypropylene resin, mix well and extrude foaming in an extruder. Most of the traditional organic chemical foaming agents are exothermic foaming agents, that is, a large amount of heat is generated during the decomposition process, so that the melt viscosity of polypropylene, which has low mel...

Claims

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