Transparent high-barrier polyester aluminum oxide plated film and preparation method thereof

Abstract

The invention relates to the field of aluminum laminated films, and particularly discloses a transparent high-barrier polyester aluminum oxide plated film and a preparation method thereof. The transparent high-barrier polyester aluminum oxide plated film comprises a base material, a polyurethane bottom coating, an aluminum oxide layer and a polyurethane surface coating which are sequentially arranged, the thickness of the polyurethane bottom coating and the thickness of the polyurethane surface coating are both 8-15 microns, the thickness of the aluminum oxide layer is 80-140 angstroms, the polyurethane bottom coating is formed by drying polyurethane coating liquid, and the polyurethane surface coating is formed by drying a polyurethane coating solution. The preparation method comprises the following steps: S1, coating a base material polyurethane priming coat to obtain a priming coat film; S2, forming an aluminum oxide layer on the polyurethane bottom coating to obtain an initial plating film; and S3, forming a polyurethane surface coating on the aluminum oxide layer, and curing to obtain the transparent high-barrier polyester aluminum oxide plated film. The aluminum oxide plated film has the advantages of good steaming resistance and barrier property.

Description

technical field [0001] The application relates to the field of aluminized film, more specifically, it relates to a transparent high-barrier polyester aluminized film and a preparation method thereof. Background technique [0002] With the improvement of people's living standards, people pay more and more attention to quality issues when shopping, especially in the food field, so the food for sale is usually covered with outer packaging. The outer packaging of food is mainly to slow down the speed of food spoilage. The outer packaging is generally composed of multi-layer films. The film is roughly divided into heat-sealing layer, barrier layer and printing layer. The function of the barrier layer is to block the external water and oxygen. , to delay the spoilage of water and oxygen on food. [0003] At present, there are many types of barrier layers on the market, such as aluminized film and nylon film. Since aluminized film is opaque, it is inconvenient for customers to obs...

AI Technical Summary

Problems solved by technology

[0003] At present, there are many types of barrier layers on the market, such as aluminized film and nylon film. Since aluminized film is opaque, it is inconvenient for customers to observe the state of food if it is used for packaging food; nylon film is transparent and has high strength. The barrier property is good, but it is easily affected by ultraviolet rays, and the applicable scenarios are limited, so it is necessary to use new materials as a barrier layer

[0004] Aluminum oxide film is a kind of transparent film. It is a film that evaporates high-purity aluminum wire into a gaseous state at high temperature, introduces oxygen to obtain aluminum oxide, and deposits aluminum oxide on the film substrate. The aluminum oxide film Oxygen barrier and water vapor barrier are good, so it has excellent barrier properties, but when the aluminum oxide film is at a higher temperature, such as above 110 ° C, the structural stability is poor, and problems such as deformation and interlayer peeling are prone to occur, that is, Retort resistance needs to be improved

Images