Method for preparing anti-fogging and anti-adhesion plastic film by nano-silica-polyhedral oligomeric silsesquioxane

Abstract

The invention discloses a method for preparing an anti-fogging and anti-adhesion plastic film by nano-silica-polyhedral oligomeric silsesquioxane. The method includes the steps: pre-crystallizing anti-adhesion master batches and PA6 slices, performing vacuum drying, adding products, triethanolamine laurate and antioxidants into a reactive blending extruder for rolling film formation, cleaning a film with ethyl alcohol and then performing vacuum drying; adding deionized water into obtained copolymer solution, performing water-bath heating, stirring and uniform dissolution, uniformly coating thefilm with the solution by a scraper bar, and naturally drying the film at room temperature to prepare the anti-fogging and anti-adhesion plastic film. Nano-silica is pretreated by silane coupling agents and compounded with allyl hepta-isobutyl polyhedral oligomeric silsesquioxane to modify PA6, melt blending is performed to prepare the anti-adhesion master batches, the thermal stability of the PA6 is obviously improved, and the processability of the master batches is improved. The friction coefficient of the film is obviously decreased, the adhesion resistance of the film is obviously improved, the water contact angle of the film is increased, the infiltration process is slowed down, and the water barrier property and the mechanical property of the film can be improved.

Description

technical field [0001] The invention belongs to the field of plastic film materials, and in particular relates to a method for preparing anti-fogging and anti-adhesion plastic films by using nano silicon dioxide-cage silsesquioxane. Background technique [0002] Biaxially oriented nylon film is a new type of high-grade packaging material with broad application prospects, but it is easy to stick between films during production and use, which seriously hinders high-speed production and use. In order to avoid the occurrence of sticking, a certain amount of additives are usually added when producing the film to achieve the effect of preventing sticking. [0003] Spraying anti-fog and drop agent on the surface of ordinary plastic film can make it have anti-fog and drop performance. Commonly used anti-fog drops include sorbitol esters, glycerol esters, polyglycerol esters, etc. Triethanolamine laurate has excellent surface activity and good biodegradability, and can be used as a...

AI Technical Summary

Problems solved by technology

However, since the acrylic acid-hydroxyethyl methacrylate copolymer contains a large amount of hydrophilic groups such as carboxyl and hydroxyl groups, the water resistance is poor, and when it is used as an anti-fogging agent, it is easy to be coated on the surface of a low-density polyethylene film. The anti-fog droplet time is shortened by the erosion of rainwater, which affects its application effect