High-modulus high-impact high-flow polypropylene and preparation method thereof

Abstract

The invention discloses high-modulus high-impact high-flow polypropylene and a preparation method thereof. The high-modulus high-impact high-flow polypropylene is prepared by use of talcum powder particles instead of talcum powder and comprises the following raw materials in parts by weight: 33-89 parts of polypropylene, 10-40 parts of talcum powder particles, 0.1-0.6 part of antioxidant, 0-25 parts of toughening agent and 0.1-1.5 parts of lubricant. According to the high-modulus high-impact high-flow polypropylene disclosed by the invention, by replacing the talcum powder by talcum powder particles, the problem in feeding talcum powder can be obviously improved, dust flying is not easily caused, the clean production is facilitated, and the staff health is protected; and a side feeding machine realizes uniform feeding and blanking, avoids material return and guarantees stability and uniformity of the content of talcum powder in a modified polypropylene system.

Description

technical field [0001] The invention relates to a polymer material, in particular to a high-rigidity and high-toughness modified material technology, and is a method for preparing a high-modulus, high-impact, and high-fluidity polypropylene material with a simple process. Background technique [0002] Usually, the modulus of polypropylene is greatly improved by adding glass fiber, talcum powder, wollastonite and other materials. However, the addition of glass fiber has the disadvantages of difficult molding conditions, poor product surface quality, and easy warping and deformation. The most commonly used method is to increase the modulus of polypropylene by adding talcum powder. However, with the addition of a large amount of talcum powder (more than 30%), especially the ultra-fine talc powder with a mesh size exceeding the purpose, the bulk density of the ultra-fine talc powder is very small, and the gaps between the powders contain a lot of air. It is easy to cause "brid...

AI Technical Summary

Problems solved by technology

However, with the addition of a large amount of talcum powder (more than 30%), especially the ultra-fine talc powder with a mesh size exceeding the purpose, the bulk density of the ultra-fine talc powder is very small, and the gaps between the powders contain a lot of air. When extruding and feeding, it is easy to cause "bridging" feeding difficulties, resulting in uneven mixing of talcum powder and polypropylene and instability of talc powder content, resulting in a decrease in the mechanical properties of the material. In the production of high-content talc powder (35% above) These problems are more likely to occur when modifying polypropylene materials