Views: 66 Author: Site Editor Publish Time: 2022-03-11 Origin: Site
Polyethylene terephthalate (PET) is a polycondensation reaction product of ethylene glycol and terephthalic acid and has a relatively high melting point. As a thermoplastic engineering material, PET has good mechanical properties, electrical insulation, chemical resistance, creep resistance, fatigue resistance and other characteristics, and is widely used in clothing chemical fiber, packaging and transportation and other fields.
China has the world's largest PET production capacity, which has increased sharply from 3.8 million tons per year in 1998 to nearly 40 million tons at present, becoming the world's largest PET producer and the world's PET production and sales center. However, the contradiction in the structure of PET products in China is very prominent, the production capacity of conventional products (fibers) is excessive, and the range of production varieties is narrow. It is of great significance to optimize the structure of PET products in China and expand its application fields.
PET can significantly reduce the material density through foaming, and also has excellent properties such as high rigidity, thermal insulation, etc., and PET foaming materials can be completely recycled, and recycled materials can be used for foaming production, which is conducive to promoting the development of circular economy.
PET foam material has the following performance advantages:
Good heat resistance, the maximum working temperature can reach 200 °C in a short time, and can be used for a long time at 120 °C.
Has excellent dimensional stability, sound and thermal insulation properties.
Has high mechanical properties and fatigue resistance.
oxygen and carbon dioxide. It has excellent wear resistance and surface blocking properties, and has good barrier properties to water,
The thermal expansion coefficient is close to that of concrete and steel.
It can be completely recycled and reused, and the recycled material can be used in the foaming process.
At present, PET foam materials are mainly used in six major fields such as wind power, high-speed rail, automobiles, construction, packaging, and ships.
The technical difficulty of PET foam materials is relatively high, and the industrialized technology, products and markets are monopolized by several major companies in developed countries. With the dry-free PET reactive extrusion foaming production technology, Chuangbo conducts chain extension modification according to the characteristics of PET raw materials, develops an advanced drying-free process to realize the extrusion foam molding of PET, and is committed to promoting the wider industrial application of this advanced material.