PP particle manufacturers and introduce some knowledge of PP particles


Release time:

2021-09-14

PP particle manufacturers say that PP particles are not only semi-finished products in the plastic molding industry, but also raw materials for extrusion, injection molding, hollow blow molding and foaming. PP plastic particles are crystalline polymers, of which PP plastic particles are extremely light, with a density of only 0.91g/cm3, which is smaller than water.

PP particle manufacturers say that PP particles are not only semi-finished products in the plastic molding industry, but also raw materials for extrusion, injection molding, hollow blow molding and foaming. PP plastic particles are crystalline polymers, of which PP plastic particles are lighter, with a density of only 0.91g/cm3, which is smaller than water. Among the general-purpose plastic particles, PP plastic particles have good heat resistance, the heat deformation temperature is between 80-100, can be boiled in boiling water, and the molding temperature is between 160-220. The polypropylene pellets have a specific gravity of 0.9g/cm3 to 0.91g/cm3 and a mold shrinkage of 1% to 2.5%. Polypropylene particles have good stress cracking resistance and high bending fatigue life. The overall performance of polypropylene plastic particles is better than that of polyethylene plastic particles. PP light weight, good toughness, good chemical resistance. What are its advantages? The following PP granule manufacturers introduce the advantages of PP plastic granules in detail.

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(1) Convenient feeding, no need to install a forced feeder in the hopper.

(2) The relative density of PP plastic particles is higher than that of powder, and the strength of plastic products is better.

(3) The resin is evenly mixed with various solid powder materials or liquid additives, and the physical properties of plastic products are uniform.

(4)PP plastic particles plastic products with uniform color.

(5)PP plastic particles contain less air agent volatile substances, so that plastic products are not easy to produce bubbles.

(6) Polypropylene plastic particles have no pollution to the extruder and the production environment.

PP particle manufacturers say that polypropylene plastic particles have good fluidity and formability at melting temperature. There are two characteristics of PP particles in processing: first, the viscosity of PP melt decreases significantly with the increase of shear rate (less affected by temperature); second, the molecular orientation is high, resulting in large shrinkage.

PP particle manufacturers say that the processing temperature of polypropylene particles is about 200-300, with good thermal stability (decomposition temperature of 310). However, at high temperature (270-300), the PP particles stay in the tube for a long time and may be degraded. Since the viscosity of polypropylene plastic particles decreases significantly with the increase of shear rate, increasing the injection pressure and injection speed will improve its fluidity, shrinkage deformation and depression. The temperature should be controlled within 30-50. The polypropylene melt can be formed into a front end through a very narrow die gap. During the melting process of PP particles, a large amount of melting heat (higher specific heat) is absorbed, and the product is hot after being released from the mold. There is no need to dry polypropylene particles during processing, and the shrinkage and crystallinity of polypropylene are lower than polyethylene.

The above is some knowledge about PP plastic particles introduced by PP particle manufacturers, and I hope it will be helpful to everyone. If you want to know more information, you can call our PP granule manufacturers. We have many years of manufacturing experience. For the characteristics of PP particles have a detailed understanding, welcome to contact us.



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