Low-oriented extrusion grade polypropylene material and preparation method thereof

Abstract

The invention discloses a low-oriented extrusion grade polypropylene material. The polypropylene material comprises the following components in parts by weight: 60-90 parts of polypropylene resin, 2-3 parts of polytetrafluoroethylene, 1-5 parts of toughening agent, 0-10 parts of heat-resistant modifier, 7-28 parts of packing, 0.1-1 part of lubricant and 0.1-1 part of antioxidant, wherein the polypropylene resin is a copolymer of polypropylene and polyethylene, and the weight ratio of polypropylene to polyethylene in the polypropylene copolymer is 95 to 5-99 to 1. According to the low-oriented extrusion grade polypropylene material and a preparation method thereof, polytetrafluoroethylene is added in the formula, so that the melt strength of the polypropylene material can be improved, then the orientation of the polypropylene material is reduced, the vertical unnotched impact of polypropylene is improved on the basis of little change of flow-directional unnotched impact, and the mechanical properties and uniformity of the material are improved. The preparation method is simple, easy to operate and low in relative cost.

Description

technical field

[0001] The invention relates to a polymer material technology, in particular to a polypropylene material and a preparation method thereof. Background technique

[0002] Polypropylene (PP) is one of the fastest growing varieties in the plastics industry. It has the advantages of good mechanical properties, light specific gravity, non-toxicity, corrosion resistance, easy processing, etc., and the raw materials are easy to obtain and low in price, so it has been widely used in the fields of home appliances, automobiles, and packaging. At present, the market competition of modified polypropylene materials is fierce, but there are also some problems in the production of polypropylene. For example, when polypropylene is extruded, the orientation is relatively large, which leads to uneven distribution of mechanical properties of the material, especially the flow of the material. The unnotched impact performance of the direction is much greater than that of the vert...