A kind of manufacturing process of crystalline nano pet plastic

Abstract

The invention discloses a production process for crystallized nano PET (Polythylene Terephthalate) plastic. The production process comprises the following steps: (1) preparing raw materials; (2) blending: mixing terephthalic acid prepared in the step (1) with ethylene glycol (EG), wherein the mass ratio of the terephthalic acid to the ethylene glycol (EG) is 1 to (1.5-2), adding a CaCO2 organic filling agent into a mixed solution, wherein the mass content of the filling agent is 3%-5% (3) carrying out an exchange reaction; (4) carrying out a condensation polymerization reaction; (5) enhancing and modifying; and (6) crystallizing and separating. According to the production process, after the raw materials are subjected to a series of treatment, PET rubber not only has a good physical and mechanical performance, good electrical insulating property, good creep resistance, good fatigue resistance, good wear resistance and good size stability in a wide temperature range, but also has a rapid crystallization rate and is easy to mold and process; the PET rubber has the characteristics of strong shock resistance and the like.

Description

technical field [0001] The manufacturing process of plastic materials involved in the present invention, in particular, relates to a manufacturing process of crystalline nano-PET plastics. Background technique [0002] At present, plastics have been widely used in the construction industry, packaging materials, household daily necessities and automobiles and other fields. Plastic is one of the four basic materials of modern industry with steel, wood and cement because of its wide range of uses and good performance. PET plastic is polyethylene terephthalate plastic, commonly known as polyester resin. It is The condensation polymer of terephthalic acid and ethylene glycol, together with PBT, is collectively referred to as thermoplastic polyester, or saturated polyester. The molecular structure of PET plastic is highly symmetrical, and it has a certain crystal orientation ability, so it has high film-forming properties. PET plastics have good optical properties and weather res...

AI Technical Summary

Problems solved by technology

Plastic is one of the four basic materials of modern industry with steel, wood and cement because of its wide range of uses and good performance. PET plastic is polyethylene terephthalate plastic, commonly known as polyester resin. It is The condensation polymer of terephthalic acid and ethylene glycol, together with PBT, is collectively referred to as thermoplastic polyester, or saturated polyester. The molecular structure of PET plastic is highly symmetrical, and it has a certain crystal orientation ability, so it has high film-forming properties. PET plastics have good optical properties and weather resistance, amorphous PET plastics have good optical transparency, and PET plastics have excellent abrasion resistance, friction resistance, dimensional stability and electrical insulation. Bottles are widely used because of their high strength, good transparency, non-toxicity, impermeability, light weight, and high production efficiency. However, PET plastics have slow crystallization speed, poor impact resistance, and are not easy to process.