Low-density and low-diffusivity polypropylene material and preparation method thereof

Abstract

The invention discloses a polypropylene material with low density and low diffusivity. The polypropylene material comprises the following components in parts by weight: 70-90 parts of polypropylene resin, 0.1-10 parts of elastomer, 3-10 parts of filler, 1-5 parts of deodorant, 1-5 parts of assistant master batch and 1-2 parts of foaming agent, the alloy material has the advantages of favorable flowability, low density and higher rigidity and toughness, and can satisfy the performance requirements for thin-walled automotive upholstery. The invention also discloses a preparation method of the material. The preparation method comprises the following steps: S1, weighing raw materials; S2, conveying polypropylene resin and an elastomer into a double-screw extruder through a main feeding assembly, uniformly mixing a deodorant and the auxiliary master batch, conveying the mixture into the double-screw extruder through an auxiliary feeding assembly, conveying a filler into the double-screw extruder through a side feeding assembly, mixing, melting, extruding, bracing, cooling and pelletizing to obtain an intermediate product; and S3, performing devolatilization treatment on the intermediateproduct to obtain the low-density and low-emission polypropylene material, and the preparation method is simple in process, easy in condition control and suitable for large-scale production.

Description

technical field

[0001] The invention relates to the technical field of modified polypropylene materials for automotive interior decoration, in particular to low-density, low-emission polypropylene materials and a preparation method. Background technique

[0002] Automobile lightweight is a systematic project, which involves structural design of related parts, manufacturer's production equipment capability level, part manufacturing process and part material selection, etc. For the current automotive interior plastic parts, since most of them use modified polypropylene materials, realizing the lightweight of such materials can make a great contribution to the lightweight of automotive interior plastic parts. Since the modified polypropylene materials used for automotive interior plastic parts have odor and VOC requirements, the developed lightweight modified polypropylene materials also need to meet these requirements.

[0003] CN111073140A discloses a low-density, low-odor a...

Images