Current situation and application trend of polyole

Polyolefin nucleating agent technology status and application trend at home and abroad

1 Introduction to nucleating agent

polyolefin has the advantages of good mechanical properties, non-toxic, heat resistance, chemical resistance, easy processing and molding, and its application fields are increasingly extensive. However, due to the structural characteristics of polyolefin, its application in some fields is limited. In order to expand the application range of polyolefin, it can be solved by adding nucleating agent. Polyolefin nucleating agent is a new functional additive that can shorten the molding cycle and improve the physical and mechanical properties of products, such as transparency, surface gloss, tensile strength, rigidity, thermal deformation temperature, impact resistance, creep resistance and so on, by changing the crystallization behavior of resin, accelerating the crystallization rate, increasing the crystallization density and promoting the micro refinement of grain size. The addition of polyolefin nucleating agent improves the rigidity of the product, improves the dimensional stability of the product, and has good circularity, transparency and surface gloss of the product. For example, after polypropylene (PP) is added with nucleating agent, the transparency and gloss of the material are improved, so that the product can be used for medical syringes, food containers, stationery and packaging, films, plates, etc; In addition, the nucleating agent can also improve the thermal deformation temperature of the material, so that PP can be used to make transparent hot cups, microwave cookers, baby bottles, etc. After polyethylene (PE) is added with nucleating agent, it can significantly reduce the haze of ethylene (LDPE) and linear low density polyethylene (LLDPE) gate films, improve the transparency and improve the processing performance of PE, which are still in an important strategic opportunity period of development

polyolefin nucleating agents can be divided into inorganic nucleating agents, organic nucleating agents and polymer nucleating agents. See Table 1 for the characteristics and applications of various nucleating agents

2 overview of foreign nucleating agent technology progress and application

2.1 introduction to nucleating agent products of major foreign companies

Milliken chemical company of the United States developed PP nucleating agent hyper form hnp-68, which can make PP production reach an unprecedented speed and improve the crystallization speed of PP. The proper use of the nucleating agent makes PP have outstanding physical properties. This nucleating agent is compatible with other additives used in the polymerization process and can meet all the nucleation requirements for the production of a single PP product. Hyperformhnp-68 has been approved by the European food safety administration and is approved for food packaging. The maximum dosage in PP and HDPE products is 0.25%. In addition, it is also applicable to LL-DPE products applied under 100

in 2004, mill actually paid most attention to its relevant configuration (i.e. the internal configuration of the experimental machine) when purchasing universal experimental machine products. Iken chemical began to supply the market with HyperForm hi5-5, a special nucleating agent for PP processing plants. Hy-performhi5-5 is the master batch of PP nucleating agent brand HyperForm hnp-681, so the processing plant can conduct various tests independently without adjusting the dosage and formula of nucleating agent through the production of PP resin plant. Hyperformhi5-5 is suitable for molding opaque P first adjust oscilloscope range P products, such as garden tools, storage containers, recycled plastic packaging, auto parts, beverage bottle caps, etc. It can effectively improve the nucleation rate of PP, which is 15% - 25% faster than that of PP without nucleating agent

Crompton company of the United States launched the PP nucleating agent/transparent agent moldpro 931 with new chemical structure in 2002. Moldpro 931 is a fusible mixed additive, which has been approved by the U.S. Food Safety Administration (FDA) and can be used in food and drug packaging

nyacol nano technology company of the United States introduced two PP nucleating agents, ngs-1000 and ngs-2000. These two nucleating agents are surface modified 50nln silicon dioxide particles, which can control the nucleation of PP, improve the crystallization temperature of PP, improve the bending modulus and impact resistance of materials, reduce the haze of materials, and obtain PP with excellent comprehensive performance. Ngs-1000 and ngs-2000 can improve the molding speed of PP, shorten the injection molding time, and reduce the dosage. In addition, ngs-1000