High-flowing high-tenacity and low-contractibility rate filling modified polypropylene material

Abstract

The utility model discloses a high-flowing high-tenacity and low-contractibility rate filling modified polypropylene material, comprising the following raw materials by weight percent: 45-80 percent of polypropylene, 5-18 percent of powdery polyethylene, 8-25 percent of inorganic filling material, 5-12 percent of calcium salt crystal whisker, 0.1-1 percent of antioxygen, and 0-2 percent of other auxiliary agent. The invention has the advantages that: 1,a defined amount of powdery polyethylene obviously is added in the invention for improving the dispersing ability of the inorganic filling material in a composite material system, thus improving the flowing performance of the polypropylene composite material; 2, the inorganic filling material with small grain size is adopted, thus overcoming the shortcoming of insufficient tenacity of the original inorganic filling material and the polypropylene material; and 3, by adopting the way of lateral feeding, the calcium salt crystal whisker isadded into an extruder, thus keeping the original characteristic of length-diameter ratio, and giving full play to the reduced contractility rate of the crystal whisker.

Description

technical field [0001] The invention relates to a high-fluidity, high-toughness, low-shrinkage filling modified polypropylene material, which is a modified polypropylene material with simple process, low cost and good comprehensive performance, and is mainly used in automobile trim parts. Background technique [0002] Polypropylene has the advantages of excellent processing performance, good gasoline and chemical resistance, light weight and low price. It is widely used in interior and exterior parts of automobiles, housings of electronics and household appliances, etc., and is currently the fastest growing general-purpose type. thermoplastic. However, polypropylene also has the obvious disadvantages of easy warping, large shrinkage, and poor toughness, especially low-temperature impact performance. [0003] Usually, the shrinkage rate of the material is greatly reduced by adding inorganic fillers such as glass fiber and talcum powder, but there are disadvantages such as po...

AI Technical Summary

Problems solved by technology

However, mineral fillers with small particle sizes are prone to "bridge" when they are added to the extruder, resulting in difficulty in feeding, which makes the measurement of mineral fillers inaccurate or cannot be effectively dispersed in the polypropylene composite material. The mechanical properties of polypropylene composites are reduced

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