A kind of three-layer co-extrusion polyethylene label film and preparation method thereof

Abstract

The invention relates to a printing and die-cutting three-layer film structure label material, in particular to a three-layer co-extruded polyethylene label film and a preparation method thereof. Thepolyethylene label film comprises an outer layer, an intermediate layer and an inner layer, the label film is prepared from the outer layer, the intermediate layer and the inner layer through a three-layer co-extrusion up-blowing forming process, and the blowup ratio is controlled to be 2-3.5. The outer layer is prepared from the following components in percentage by mass: 70-85% of high-density polyethylene, 10%-20% of metallocene catalyzed polyethylene and 5%-10% of low-density polyethylene, wherein the sum of the mass percentages of all the components is 100%. The intermediate layer is prepared from the following components in percentage by mass: 75-90% of high-density polyethylene and 10%-25% of metallocene catalyzed polyethylene. The inner layer is prepared from the following components in percentage by mass: 70%-90% of medium-density polyethylene and 10%-30% of low-density polyethylene. The label film provides sufficient stiffness and excellent die-cutting performance and has good vertical and horizontal balanced physical properties.

Description

technical field [0001] The invention relates to a printable and die-cuttable three-layer film structure label material, and in particular to a three-layer co-extruded polyethylene label film and a preparation method thereof. Background technique [0002] When consumers choose from a wide range of similar products, product packaging is the key factor to attract consumers, and the core of product packaging is the label, which is the carrier of the brand, and whether it is exquisite or not plays a key role. With the development of economy and high technology, products are changing with each passing day, people's life tends to be more convenient and leisure, and there are higher requirements for the outer packaging of products. At present, label films in the domestic market maintain a momentum of rapid growth and are widely used, and label materials will also develop in a high-level and diversified direction. In packaging design, we should try to use the same material, material...

AI Technical Summary

Problems solved by technology

However, due to the different types of film multilayer materials, the processing stability on common blown film equipment is poor, which affects the quality of the film