Manufacturing method of sheet polymer plastic particles

Abstract

The invention relates to a manufacturing method of sheet polymer plastic particles, and the manufacturing method comprises the steps of raw material mixing, resin perfusion, forced cooling and sheet granulation, etc. The manufacturing method of sheet polymer plastic particles in the invention can be used to manufacture sheet polymer plastic particles under the condition of not using high power consumption equipment such as a double-shaft extrusion machine. Therefore, compared with known plastic particle manufacturing processes, the method of the invention not only has a lower energy consumption, but also can achieve the purpose of energy conservation and carbon saving. Further, as the polymer plastic particles needs no double-shaft extrusion machine for mixing and transport, they would not be damaged structurally and chain scission cannot be resulted. And the sheet polymer plastic particles of the invention have a higher number of molecules compared with the known plastic particles, thus having good ductility.

Description

technical field [0001] The invention relates to a method for manufacturing sheet-like polymer plastic granules. Background technique [0002] In the known method of producing plastic pellets, an isocyanate polymer containing isocyanate group (NCO), a hydroxyl compound containing hydroxyl group (OH) and a bridging agent are usually transported to a certain amount of mixer for heating at the same time. Melting into a liquid thermoplastic polyurethane resin (TPU), and then extruding the thermoplastic polyurethane resin to a granulation equipment through a biaxial extruder for water granulation to obtain plastic pellets; wherein, the water granulation will TPU The resin is extruded from the extrusion die of the biaxial extruder to form the thermoplastic polyurethane resin into strips, and then the thermoplastic polyurethane resin is cut into circular or cylindrical blocks by the granulation equipment, and the block The thermoplastic polyurethane resin falls into a water tank to...

AI Technical Summary

Problems solved by technology

[0004] 1. This manufacturing method not only has a complicated manufacturing process, but also requires the use of high-power-consuming equipment such as biaxial extruders, which consumes more energy. According to actual tests, the overall power consumption of this manufacturing method is about 500 to 800 kilowatts. Does not conform to the concept of environmental protection;

[0005] 2. The plastic granules produced by this manufacturing method form blocks and conduct heat slowly, so downstream users need to use more energy to heat and melt the plastic granules during post-processing, which will increase energy consumption;

[0006] 3. The manufacturing method must use a twin-shaft extruder for mixing and transportation, resulting in chain scission and cracking of the molecular structure of the thermoplastic polyurethane resin, which reduces the molecular weight of the plastic pellets, resulting in poor ductility of the plastic pellets. Especially when downstream users are performing post-production processing, they usually use the twin-shaft extruder again for mixing and transportation, so that the molecular structure of the thermoplastic polyurethane resin will be broken again, and the ductility will be worse;

[0007] 4. In this manufacturing method, in order to prevent the plastic pellets from sticking to each other during the granulation process, lubricants, such as silicone or wax, are usually added to the water tank, but the lubricant will make the surface of the plastic pellets lubricious Feeling, and it is easy to cause downstream users to have insufficient viscosity during post-processing

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