Polypropylene (PP) has excellent mechanical properties, non-toxicity, low relative density, heat resistance, chemical resistance, easy processing and forming, easy availability of raw materials, low price, etc. It has become the fastest growing among the five general synthetic resins. The most active varieties of new product development are widely used in chemical, chemical fiber, construction, light industry, automobile manufacturing, home appliances, packaging materials, etc., and continue to expand new application areas. However, compared with PVC and PS, polypropylene has a slower crystallization rate, a long molding cycle, poor low-temperature impact performance, poor gloss and transparency of the product, lack of aesthetic appearance, and large molding shrinkage, which makes it applicable. To a certain extent, it has been restricted, especially in the fields of transparent packaging, daily necessities and engineering materials. Modification of polypropylene with a nucleating agent is a simple and effective method for achieving high performance and high transparency of PP. The key to transparent modification technology is the performance of nucleating transparent agent. At present, the global consumption of nucleating transparent agents exceeds 5,000 tons/year, of which 80% are sorbitol nucleating agents. Foreign sorbitol nucleating agent products have been developed to the third generation. At present, the annual production of domestic polypropylene nucleating transparent agent is about 500 tons. The domestic nucleating transparent agent is mainly based on the first and second generation products, and the variety and quality are far from the foreign products. In terms of output, it can not meet the needs of the market. Therefore, the transparent PP special materials used in the manufacture of microwave tableware, medical injection products, plastic industrial products and other products mainly rely on imports, which is closely related to the backward development of domestic PP nucleating transparent agents. of. However, the demand for transparent polypropylene resin in China is growing rapidly. Transparent polypropylene has become a new selling point in the domestic polypropylene resin market. Therefore, there is an urgent need to develop high-performance, new-generation polypropylene nucleating transparent agent. It is estimated that by 2005, the domestic production of transparent polypropylene will reach more than 300,000 tons, and the consumption of national nucleating transparent agent will increase to about 1,000 tons. Polyester Spandex Brush Knit Fabric Polyester Spandex Knit Fabrics,Polyester Single Jersey Fabrics,Polyester Spandex Knit Fabric,Polyester Knit Jersey Fabric Shaoxing Winfar Knitting & Embroidery Co.,Ltd. , https://www.wfknitting.com