Core-shell toughened and anti-fogging preservation master batch for PET film

Abstract

The invention discloses a core-shell toughened and anti-fogging preservation master batch for a PET film. The master batch comprises the following components in percentage by mass: 10-30 percent of a PET resin, 20-40 percent of nano calcium carbonate, 20-40 percent of an elastomer, 2-6 percent of methylacrylic acid, 1-3 percent of diethyl azodicarboxylate, 3-10 percent of a dripping agent, 3-10 percent of an antifogging agent, 1-3 percent of a stabilizer, 0.5-2 percent of a nucleating agent, 0.5-3 percent of a coupling agent and 0.1-2 percent of an antioxidant. The nano calcium carbonate is treated and interacts with the elastomer so as to carry out a grafting reaction, a core-shell structure in which the elastomer is chemically coated with nano calcium carbonate is formed, and the synergistic toughening effect is enhanced. Meanwhile, the prepared master batch has the characteristics of anti-fogging performance, aging resistance, heat resistance, chemical resistance and the like and can be directly added and used in production of PET films, the process is simple, the operation is convenient, the product quality can be improved, and the master batch has high practical values and application prospects.

Description

technical field [0001] The invention relates to the technical field of macromolecular materials, in particular to a core-shell toughening and anti-fogging fresh-keeping masterbatch for PET films. Background technique [0002] Polyethylene terephthalate (PET) is a kind of linear polyester, which is often used as a raw material for extruded films and shed films. However, due to the relatively high glass transition temperature and melting point of PET, the crystallization speed is relatively slow, and the products The surface is rough, the gloss is poor, and the impact toughness is not good. Simultaneously, along with the improvement of people's living standards, the requirements for material life are also getting higher and higher. In order to obtain rich nutrition and vitamins, people will eat food such as fresh fruits and vegetables in sufficient amount every day. Usually adopt plastic preservative film or preserve in packing container, although plastic preservative film ca...

AI Technical Summary

Problems solved by technology

[0002] Polyethylene terephthalate (PET) is a kind of linear polyester, which is often used as a raw material for extruded films and shed films. However, due to the relatively high glass transition temperature and melting point of PET, the crystallization speed is relatively slow, and the products Rough surface, poor gloss, poor impact toughness

Simultaneously, along with the improvement of people's living standards, the requirements for material life are also getting higher and higher. In order to obtain rich nutrition and vitamins, people will eat food such as fresh fruits and vegetables in sufficient amount every day. It is usually stored in plastic cling film or in a packaging container. Although plastic cling film can have a certain fresh-keeping effect by blocking oxygen in the air, it is far from meeting people's requirements for anti-fog drop preservation.