Polypropylene Color Masterbatch

Polypropylene, abbreviated as PP, is a colorless, odorless, non-toxic, translucent solid material and one of the five general synthetic resins. It has chemical resistance, heat resistance, electrical insulation, high strength mechanical properties and good high wear resistance. The main features are light weight, resistance to falling, easy cleaning, safe and reliable products, transparent appearance, and PP masterbatch has obvious advantages in the food industry.

Product use: plastic daily necessities, cups, trash cans, bathroom supplies, storage supplies, plastic pots, lunch boxes, plastic tableware, fruit plates, household products, etc.

Product advantages: good flame retardancy, toughness, reinforcement, conductive grade, anti-static, chemical resistance, high strength, high impact, high gloss, flexibility, anti-aging, good dispersion and other advantages.

Dispersion of color masterbatch in polypropylene fiber:

Polypropylene fibers of various colors are caused by the uniform dispersion of pigment particles in polypropylene fibers. The key is that the pigment particles are completely refined and uniformly distributed (mixed) in the polypropylene fiber. Refining and dispersion is to completely refine pigment particles and uniformly distribute (mix) them in polypropylene fibers. The purpose of refining and dispersion is to break up the aggregates or circles of pigments to minimize their particles. The key is uniform dispersion. Dispersion has influence on luster, transparency, glossiness, fiber strength, elongation and aging resistance of dyed polypropylene fiber, Negative rates have an impact.

In general, the particle size of pigment dispersion used for fiber or ultrathin film is less than 1um, larger than 5um will lead to fiber surface, and larger than 10um will lead to spots and stripes on fiber surface, and the particle size will increase. The breaking strength and elongation decrease continuously. The finer the particle size, the stronger the coloring force and the better the dispersion. At the same time, the smaller the particle size, the larger the surface, resulting in increased hiding power.

Pigment particles can be divided into three types: primary particles, aggregates and aggregates. Generally, commercial pigment particles are larger than aggregates (about 75-250um), so they must be dispersed. The so-called pigment dispersion is the process of crushing and refining aggregates.

For pigment dispersion, firstly wet the pigment with a wetting agent, cover the surface of the pigment, reduce the cohesion between the pigments, and reduce the energy required to damage the circular objects of the pigment. Secondly, crush and refine the pigment, resulting in the free movement between pigment particles (impact stress) and the shear stress of the circular objects of the pigment through the surrounding media to damage the circular particles. After the pigment is dispersed and refined, the particle size decreases, the surface area increases, and the free energy of the pigment surface also increases, which leads to the instability of the refined pigment. Therefore, the pigment surface should be further coated to reduce the newly formed interface. Yes, in order to prevent re agglomeration, the pigment is mixed and dispersed in the melt, that is, the wetted and crushed pigment is evenly distributed to the material to be colored.

Application range：