A preparation method of antistatic modified recycled plastic particles

Abstract

The invention discloses a method for preparing antistatic modified regenerated plastic granules. By using straw powder, coconut shell powder and sawdust granules to modify waste plastics, new plastic granules are prepared. The antistatic modified regenerated plastic granules have good toughness , high strength, strong corrosion resistance, strong stability of plastic particles, reducing the characteristics and performance of the plastic itself, can make the plastic particles maintain the inherent characteristics of the original plastic, measured according to GB / T 15662-1995, the volume resistivity is 6.01 ×10 5 ‑7.1×105Ω / sq, measured according to GB / T 31838.3‑2019, the surface resistance is 7.2×105‑8.82×105Ω / sq, measured according to HG / T 2580‑2008, the tensile strength is 40.6‑48.5MPa, solved The technical problem of the modified recycled plastic particles in the prior art is that the antistatic effect is poor.

Description

technical field [0001] The invention relates to the technical field of plastic particle production, in particular to a method for preparing antistatic modified recycled plastic particles. Background technique [0002] As the consumption of plastic products continues to increase, waste plastics are also increasing. In addition, the annual consumption of plastics for automobiles in my country has reached 400,000 tons, and the annual consumption of plastics for electronic appliances and home appliances has reached more than 1 million tons. These products have become one of the important sources of waste plastics after they are scrapped. It is understood that in 2004, domestic waste plastics reached about 11 million tons. If the storage, transportation and processing of these waste plastics are not properly used and post-processed, the waste plastic raw materials waiting to be processed will definitely damage the environment and endanger the health of the people. [0003] With...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a method for preparing antistatic modified recycled plastic particles, which solves the following technical problems: (1) By using straw powder, coconut shell powder and sawdust particles to modify waste plastics, new plastic particles are prepared , to reuse waste plastics, which not only saves social resources, but also protects the environment. By adding antioxidants such as naphthylamine, diphenylamine, p-phenylenediamine, hydroquinone or thiobisphenol, the prepared modified recycled plastics can be increased Antioxidant effect of particles, by adding maleic anhydride grafted polyethylene, maleic anhydride grafted polypropylene, maleic anhydride grafted polybutene compatibilizer, dioctyl phthalate, diphthalate Plasticizer of butyl ester, diisononyl phthalate or DIDP diisodecyl phthalate, stabilizer of calcium stearate, epoxy resin or zinc stearate, and silane coupling agent, so that The mixed reaction effect of the recycled plastic particles is better in the preparation process. By adding an antistatic agent, the prepared modified recycled plastic particles have a good antistatic effect. The antistatic modified recycled plastic particles have good toughness and high strength. Strong corrosion resistance, strong stability of plastic particles, reducing the characteristics and performance of the plastic itself, can make the plastic particles maintain the inherent characteristics of the original plastic, measured according to GB / T15662-1995, the volume resistivity is 6.01×10 5 -7.1×105Ω / sq, measured according to GB / T 31838.3-2019, the surface resistance is 7.2×105-8.82×105Ω / sq, measured according to HG / T 2580-2008, the tensile strength is 40.6-48.5MPa, solved The technical problem of the poor antistatic effect of the modified recycled plastic particles in the prior art; (2) by opening the top cover plate of the centrifugal cylinder of the screening device, plastic particles are put into the centrifugal cylinder, and the cover plate is covered, the first The output shaft of the motor drives the centrifugal disc to rotate, and the centrifugal disc drives the plastic particles to centrifuge. The centrifuged plastic particles enter the screening cylinder of the screening shell through the first connecting pipe and the second connecting pipe in turn, and the second motor output shaft drives the first pulley to rotate. , the first pulley drives the second pulley to rotate through the belt, the second pulley drives the driving rod to rotate, the driving rod drives the sieving cylinder to rotate through the support arm on the outer peripheral surface, and the sieving cylinder screens out the qualified plastic particles through the sieving holes on the surface , the plastic shell screened out from the sieve empty falls into the sieve bucket at the bottom of the sieve shell, and the vibrating motor generates vibration to drive the screen in the sieve bucket to sieve the plastic shell. The fixed block and the connecting block make the spring expand and contract, and at the same time, the screening shell rotates through the first fixing block, the first connecting pin and the mounting seat, and the qualified plastic particles after screening fall into the receiving box. Through the above structure, the screening device is The prepared plastic particles are first centrifuged by the centrifugal disc, then screened by the screening cylinder, and finally the vibrating motor screens the screen in the sieve bucket, which effectively improves the screening effect of the plastic particles and solves the problem of finished products in the prior art. After the plastic particles are extruded, there are some defective products, and the conventional screening device is difficult to efficiently screen the good products and the defective products; (3) After the screening is completed, the blower passes through the second suction pipe and the first suction pipe Extract the unqualified plastic particles on the sieve plate in the sieve bucket and in the screening shell into the defective product tank. Through the above structure, the defective plastic particles are extracted into the defective product tank through the blower, without affecting the screening of the finished plastic particles. To facilitate the collection of defective plastic particles, pull the material receiving box, and the material receiving box moves out along the slide rail on the second support plate through the slider at the bottom, and then the qualified antistatic modified recycled plastic particles can be taken out from the material receiving box. Through the above structure, the receiving box is easy to move, and it is convenient to take out the qualified finished plastic granules, which solves the technical problem in the prior art that it is not easy to collect and take out the good-quality plastic granules and the defective plastic granules after screening.

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