Preparation method of recyclable nanoparticle enhanced antistatic PET packaging material

Abstract

The invention provides a preparation method of a circulating nanoparticle enhanced antistatic PET packaging material. The preparation method comprises the following steps: S1, preparing ethylene glycol phthalate; s2, dissolving a multifunctional branching agent in dimethyl sulfoxide, then adding into sodium hydrogen sulfate, adding 3, 4-dihydroxyphenylalanine at a certain temperature, and reacting to obtain a modified branching agent; s3, dissolving the modified branching agent in a metal chloride solution to obtain a metal complexing branching agent; s4, preheating a metal complexing branching agent and a functional branching agent, adding the metal complexing branching agent and the functional branching agent into the ethylene glycol terephthalate prepared in the step S1, adding a thermal stabilizer, and reacting to obtain a metal-branched PET copolyester chip; and S5, processing the metal-branched PET copolyester chip into any form needing the PET packaging material. According to the invention, an antistatic agent does not need to be directly added, and metal is directly used as an effective component in a PET molecular chain, so that a lasting antistatic effect is achieved.

Description

technical field [0001] The invention relates to the field of packaging materials, in particular to a method for preparing a recycled nanoparticle-enhanced antistatic PET packaging material. Background technique [0002] Polyethylene terephthalate (PET) is a semi-crystalline polymer with relatively high melting temperature and glass transition temperature, and is widely used in fiber and non-fiber fields. An important application of PET in the non-fiber field is to make films, which are used as packaging materials for electronics, electrical appliances and other industries. [0003] Due to the insulating properties of PET itself, it is easy to generate and accumulate static electricity during contact and friction. The problem of static electricity has brought a lot of trouble to the processing and application of PET. The existence of static charge makes the surface of PET products easy to absorb dust during storage and use, which affects the appearance effect; when processi...

AI Technical Summary

Problems solved by technology

To choose an antistatic agent, you must first consider its compatibility with the resin. If the compatibility between the two is too good, it will be difficult to migrate the antistatic agent molecules, and the antistatic agent lost on the surface of the material cannot be replenished in time, and it is difficult to play a role; and Poor compatibility makes processing difficult, the antistatic agent will be precipitated in large quantities, the appearance performance of the product will be reduced, and the precipitated antistatic agent will be lost quickly, and its antistatic performance is also difficult to maintain for a long time

When plastic products use granular or powdery antistatic agents, it is difficult to distribute them evenly in the products, resulting in uneven antistatic properties on the surface of the products and affecting the use effect.