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Pp Black Masterbatches With Native Particles Present

pp Black Masterbatcheses It is made of carbon black, carrier and additives injection molding process and other parts of the production of color masterbatch. In the plastic molding process, pp Black Masterbatches almost everyone used for dyeing, for anti-aging, for conductive products, the use of many problems often bother us. Xiao Bian will now we are concerned about some of the issues to explore, hoping to bring you a harvest

What kind of material does the black masterbatch

Composed of pp Black Masterbatches materials are: A. carbon black; B. carbon black carrier; C. carbon black wetting agent; D. carbon black dispersant; E. other processing aids.

pp Black Masterbatcheses with carbon black in accordance with international classification, China has more than 30 varieties. Mainly divided into rubber and non-rubber with two categories. In the rubber with carbon black is mainly wear-resistant carbon black, can effectively improve the wear resistance of rubber tires; in non-rubber with carbon black, really can be used as pp Black Masterbatches carbon black only a few. The most widely used carbon black in the tank is mainly due to its rich source, high purity and small particle size. Among them, it is divided into high pigment carbon black (particle size 9-17mm), medium pigment carbon black (particle size 18-25mm) and low pigment carbon black (particle size 26-37mm). Due to different varieties of carbon black, the price difference is very large. Carbon black particles because of its own multi-lively, rarely native particles exist, almost all of the range of particles in the presence of aggregated particles exist.

What is the carbon black carrier?

The carrier is a material that carries carbon black. What kind of raw materials are used in general plastic products, and what raw materials are used for the carrier? This made pp Black Masterbatches with plastic raw materials compatibility is better. Such as: PS (polystyrene) plastic products, the use of pp Black Masterbatches carrier is PS. For polyethylene plastic products, the carrier is polyethylene. However, the general use of LDPE (high pressure polyethylene), because LDPE carrying carbon black the strongest, and processing performance. While other polyethylene HDPE and LLDPE can only produce low concentrations of pp Black Masterbatches. For PP (polypropylene) plastic products, only PP and LDPE as the carrier of the pp Black Masterbatches, but can not use HDPE and LLDPE and other plastics as the carrier of the pp Black Masterbatches. Of course, also useful to take the material to do the carrier of the pp Black Masterbatches.

Why carbon black requires wetting agent

Carbon black specific gravity of about 2g / cm, because the carbon black particle size is small, the performance density is very small, it seems fluffy, it seems very light. To smooth processing, you must first carbon black wet. The choice of wetting agent is critical. In order to reduce costs, a large number of companies using white oil or paraffin products, such as a small number, will seriously affect the strength of processed products.

What are the dispersants used for carbon black masterbatches?

Organic dispersant and inorganic dispersant. High-grade black masterbatch using organic dispersant, mainly used for the use of higher environmental requirements of plastic products, such as drip irrigation products. Low-grade pp Black Masterbatches using inorganic dispersant, commonly used calcium carbonate. Can be judged from the masterbatch packaging, 25 kg only half of the bag is certainly the use of inorganic dispersant; full bag is the use of organic dispersant pp Black Masterbatches. The use of inorganic dispersants can greatly reduce the cost of pp Black Masterbatches, but very fatal is that calcium carbonate has the effect of accelerating the aging of plastic products.

pp Black Masterbatches also need processing auxiliaries?

Of course need. Smooth processing requires the correct selection of antioxidants, internal lubricants, external lubricants, modifiers and antistatic agents.

pp Black Masterbatches what processing methods

There are three types: single screw method, twin screw method and close love method.

Single screw method: the use of mixing machine to mix the material, by a single screw extruder pull granulation, the general carbon black concentration of 18-20%, backward technology, the production site of poor environmental conditions, is eliminated technology, do not rule out Some small factories have just started using this method of processing.

Twin screw method: the use of mixing machine to mix the material, the twin-screw extruder pull or water ring granulation, due to the twin-screw machine itself is limited mixing capacity, masterbatch general carbon black concentration of 25-32%.

Mixing method: the use of mixing machine to mix the material, add the mixer after kneading, and then fed by the feeder twin screw extruder, by water ring or underwater pelletizing, masterbatch general carbon black concentration in the 40- 45%.

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