Micro-foaming flame-retardant polypropylene (PP) composite material and preparation method thereof

Abstract

The invention discloses a micro-foaming flame-retardant polypropylene (PP) material, and the preparation raw materials of the micro-foaming flame-retardant polypropylene material comprise the following components in mass percentage: 50% to 70% of polypropylene, 10% to 20% of core-shell silicone rubber particles, 10% to 15% of hollow glass beads, 5% to 10% of foaming agent masterbatches and 2% to 5% of a flame retardant, wherein the foaming agent masterbatches are prepared from a foaming agent, a nucleating agent, an elastomer and carrier resin, and the foaming agent is expanded graphite. The invention also discloses a preparation method of the micro-foaming flame-retardant polypropylene material. The micro-foamed flame-retardant polypropylene material has excellent mechanical properties and flame retardance, high strength, good toughness, good dimensional stability, uniform cells, good foaming quality, and low production cost, and equipment requirements in the production process are low.

Description

technical field [0001] The invention belongs to the technical field of engineering plastics, in particular to a microfoaming flame-retardant polypropylene material and a preparation method thereof. Background technique [0002] As the requirements for energy consumption and manufacturing costs are getting higher and higher, the metal materials used in traditional mechanical parts are becoming more and more difficult to meet the requirements. As high-performance plastics for construction and mechanical parts, engineering plastics have the advantages of light weight, low manufacturing cost, easy lubrication, low noise, corrosion resistance, stable chemical properties, shock absorption, simple manufacturing process, and strong designability. It has been widely concerned and successfully applied in the field of automobile industry. [0003] Foaming materials in engineering plastics is a way to promote the lightweight of automobiles. The micro-foaming injection molding process ...

AI Technical Summary

Problems solved by technology

In the prior art, the foaming process of polypropylene generally adopts the gas foaming process, but the foaming temperature range of polypropylene is very narrow, the foaming process is difficult to control, and problems such as gas escape and uneven cell distribution are prone to occur

The existing raw materials for the preparation of polypropylene foam materials and the foaming process have problems such as high cost, high requirements for equipment, and difficulty in controlling the foaming process, and the quality of the prepared polypropylene foam materials cannot meet the requirements.

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