Polypropylene because of its light weight, corrosion resistance, high strength, hydrophobic warmth good, low cost, in China has been rapid development. As the production of polypropylene raw materials isotactic polypropylene chain lack of pro-dye groups, the general raw materials do not occur between the molecular role of dye molecules difficult to spread among the molecules, prone to bleeding and migration phenomenon, thus affecting product quality. Polypropylene masterbatch

Although the current domestic and foreign large-scale production of melt masterbatch are coloring, but most do not fundamentally solve the pigment molecules and fiber molecules affinity, polypropylene dyeing difficult problem still exists, to a certain extent, restricts the polypropylene Development and its application in many fields. In order to overcome the above performance defects, today, Rachel to introduce you in the production of polypropylene masterbatch additives choice. Polypropylene masterbatch

1 pigment selection

As the production process of polypropylene harsh conditions, requiring the pigment must have heat resistance, migration resistance, small size, easy to disperse the characteristics to meet the above requirements and can use polypropylene pigment is not much, most domestic manufacturers or their own pigment processing or Directly selected pre-dispersed pigments. The use of Swiss imports of beautiful color series of pigments, pre-dispersed treatment and then feeding production to ensure that the superior performance of the pigment, while making the particle size smaller, so as to achieve the purpose of good dispersion. Polypropylene masterbatch

2 carrier selection

As the polypropylene spinning speed, the matrix resin molecular weight and its distribution and ash and other indicators have strict requirements, some domestic manufacturers use the United States Philip K resin, DuPont EVA-565 and South Korea's Samsung EVAE-141, etc. As the carrier, the effect is ideal. Polypropylene masterbatch

3 choice of dispersant

At present, most domestic manufacturers are using low molecular weight polyethylene wax as a pigment dispersant. Because of its use of pyrolysis production, dispersion temperature is low, impurity and affect the quality of masterbatch, some manufacturers use BASF polymerization of low molecular weight wax, but the price is more expensive. Some manufacturers use domestic low molecular weight polypropylene wax as dispersant, which is characterized by high PP softening point of wax, oxidized PE wax molecular chain with a certain amount of shuttle base and by the base, and pigment and resin compatibility is better than low molecular weight PE wax. Polypropylene masterbatch

4 the choice of affinity agent

In the formulation, adding a component of the affinity agent is a prominent feature of this paper. Its role is to improve the pigment molecules and PP macromolecular chain of chemical action, thereby reducing the pigment "spray frost" and migration phenomenon. Polypropylene masterbatch