Flame-retardant continuous glass fiber reinforced polypropylene prepreg material and preparation method thereof

Abstract

The invention discloses a flame-retardant continuous glass fiber reinforced polypropylene prepreg tape material. The raw material composition includes: 50 parts of polypropylene; 70-150 parts of continuous glass fiber; migration-resistant halogen-free flame retardant 40-50 parts of masterbatch; 0-2 parts of compatibilizer; 0.5-1.0 parts of heat stabilizer; 0-0.5 parts of light stabilizer. Based on the total mass of 100%, the raw material composition of the migration-resistant halogen-free flame retardant masterbatch includes: 25% polypropylene; 30%-35% modified polyphosphate flame retardant; phosphorus nitrogen halogen-free expansion Type flame retardant 30% ~ 40%; polyphosphate melamine salt 0 ~ 10%. The invention also discloses the preparation method of the flame-retardant continuous glass fiber reinforced polypropylene prepreg material, which includes: after uniformly mixing the raw materials except the continuous glass fiber, melting and kneading through a single-screw extruder, melting and kneading The body is transported into the impregnation mold through a melt distributor or a casting mold, and impregnated with continuous glass fibers to obtain the flame-retardant continuous glass fiber reinforced polypropylene prepreg tape material.

Description

technical field [0001] The invention relates to the technical field of polymer material processing, in particular to a flame-retardant grade continuous glass fiber reinforced polypropylene prepreg material and a preparation method thereof. Background technique [0002] Continuous fiber reinforced thermoplastic composite (CFRTP) is an advanced composite material. Continuous fiber can greatly improve the mechanical properties of the matrix material because of its long fiber length and high performance, and it can be compared with long fiber reinforced thermoplastic of the same substrate. Materials (LFT materials) are mixed and molded to make the products more composite, functional, and lightweight, and are gradually applied in the fields of automobiles, machinery, chemicals, building materials, and military industries. [0003] The lining board materials of trucks, trains, containers, etc. have been gradually required to have flame retardant function. New energy vehicles requi...

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Problems solved by technology

[0005] The patent specification with the notification number CN102532681B discloses a halogen-free intumescent flame-retardant continuous fiber-reinforced polypropylene composite material, which is synergistically flame-retardant through the compounding of ammonium polyphosphate, melamine, and pentaerythritol, but the system is easy to absorb moisture, Moisture absorption, and the compounding of various raw materials will lead to hidden dangers of production stability. At the same time, composite materials will appear penetration and migration after long-term storage, resulting in a greatly reduced original flame retardant performance of the product

[0006] The patent specification with the notification number CN205467704U discloses a continuous fiber-reinforced thermoplastic flame-retardant prepreg tape composite material, which uses a combination of non-flame-retardant continuous fiber-reinforced thermoplastic prepreg sheet layers and flame-retardant film layers to achieve flame-retardant effects, but the The first method only uses the flame retardant film layer on the surface to achieve the flame retardant effect. Once the flame retardant film layer is worn, the flame retardant will fail; in addition, this form is suitable for horizontal combustion. If the flame is changed to vertical combustion, the flame retardant effect will be greatly reduced.

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