Halogen-free flame-retardant continuous fiber reinforced polypropylene composite material and preparation method thereof

Abstract

The invention relates to a halogen-free flame-retardant continuous fiber reinforced polypropylene composite material and a preparation method thereof. The material comprises the following components, by weight, 100 parts of polypropylene, 15-100 parts of continuous fiber, 1-12 parts of maleic anhydride grafted polypropylene, 0.08-0.7 parts of an antioxidant 1010, 0.06-0.6 parts of an antioxidant 168, 0.05-3 parts of a silicane coupling agent KH550, and 20-120 parts of a halogen-free expansion type flame retardant agent. According to the present invention, the flame-retardant agent comprising ammonium polyphosphate, melamine, a melamine borate and pentaerythritol is compounded with the polypropylene, such that the excellent flame-retardant performance is provided for the polypropylene; with the enhancement through the high performance continuous fiber, the mechanical property of the material is substantially improved; the flame-retardant material of the present invention does not contain halogen, the amount of the generated smoke is less, and the toxicity of the smoke is low; the requirements in fields of electricity, rail transportation, construction and the like can be met.

Description

Technical field [0001] The invention belongs to the field of polypropylene composite materials and relates to a halogen-free expanded flame-retardant continuous glass fiber reinforced polypropylene composite material and a preparation method thereof. Background technique [0002] As a general-purpose plastic, polypropylene has good processability, mechanical properties and low price. Therefore, it is widely used in chemical industry, chemical fiber, packaging, home appliances and other industries. However, polypropylene also has shortcomings such as poor low-temperature toughness, insufficient high-temperature strength, and flammability, which greatly limits the application range of polypropylene materials. Therefore, high-performance modification of polypropylene such as reinforcement, toughening, and flame retardancy is a necessary means to broaden its application fields. [0003] In the flame retardant modification of polypropylene, halogen flame retardant polypropylene ...

AI Technical Summary

Problems solved by technology

Compared with the matrix material, the strength and modulus of short fiber reinforced polymer composites have been slightly improved, but the impact toughness of the material has not been substantially improved.

Chinese patent CN101550249 reports a halogen-free flame-retardant glass fiber reinforced polypropylene composite material. Since the final fiber reinforcement is short fiber reinforcement, the mechanical properties of the material are not significantly improved.

Chinese patent CN101418100 discloses a method for a halogen-free flame-retardant long glass fiber reinforced polypropylene composite material. Although the long fiber reinforced polypropylene composite material can improve the mechanical properties of the matrix material to a certain extent, it is difficult to meet the requirements of the high-tech industry. Composite materials require high strength and high toughness, especially in the field of rail transit and construction

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