High temperature-resistant and anti-aging two-side coated polyester aluminized film and production method thereof

Abstract

The invention discloses a high temperature-resistant and anti-aging two-side coated polyester aluminized film, which is prepared by double-side coating of a polyester substrate. Specifically, one side is coated with a PMMA composite coating, and the other side is coated with a polyurethane composite coating, wherein the polyurethane composite coating is prepared from the following raw materials by weight part: 40-50 of a waterborne polyurethane emulsion, 3-5 of a polytetrafluoroethylene emulsion, 2-4 of rosin, 2-4 of acrylic acid, 2-4 of dimethyl silicone oil, 0.1-0.2 of turkey red oil, 2-4 of nano alumina, 1-2 of nano titanium dioxide, 0.2-0.4 of propyl gallate, and 40-50 of water. The aluminized film provided by the invention not only can effectively prevent adhesion phenomenon, has good barrier properties, high peel strength, good acid and alkali resistance, increases the compounding fastness on the back of the aluminized film, and has good use performance, but also has good high temperature resistance, anti-aging properties, long service life and high practical value.

Description

technical field [0001] The invention relates to the technical field of packaging materials, in particular to a high-temperature and anti-aging double-sided coated polyester aluminized film and a production method thereof. Background technique [0002] With the increasing development of the commodity economy, the role of commodity packaging is becoming increasingly important, especially for commodities with high quality assurance requirements such as food and medicine. In order to improve the circulation cycle and shelf life of commodities, packaging with high barrier performance packaging materials is often the most effective means. . At present, the commonly used packaging material is polyester aluminized film, and its common composite structure is "PET / VMPET / PE" three-layer composite. This structure has good barrier properties, but it will immediately delaminate when it meets water after peeling off It has the function of acid and alkali resistance, and the adhesion perfo...

AI Technical Summary

Problems solved by technology

At present, the commonly used packaging material is polyester aluminized film, and its common composite structure is "PET / VMPET / PE" three-layer composite. This structure has good barrier properties, but it will immediately delaminate when it meets water after peeling off It has the function of acid and alkali resistance, and the adhesion performance of the aluminum layer after aluminization is poor, which affects the performance of the composite film

The general chemical coating film is only coated with polyurethane material on one side of the polyester film, so that the polyester aluminized film has a certain improvement in the barrier properties and the peel strength of the aluminized surface, and it does not have acid and alkali resistance.

At the same time, with the continuous development of the packaging industry, the performance requirements for aluminized films are increasing day by day, and new requirements are also put forward for the composite fastness and acid and alkali resistance of the back of the aluminized film. Improve

Moreover, ordinary polyester aluminized film has poor high temperature resistance and aging resistance, which affects its performance and application range.

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