Primer-free double-faced adhesive tape layer polypropylene pre-coated film and preparation method thereof

Abstract

The invention discloses a primer-free double-faced adhesive tape layer polypropylene pre-coated film and a preparation method thereof. The pre-coated film comprises a first hot melt adhesive layer, abase material film layer and a second hot melt adhesive layer which are arranged in sequence. Raw materials of the first hot melt adhesive layer and the second hot melt adhesive layer comprise an ethylene-vinyl acetate polymer, an antioxidant, a plasticizer and a tackifier, and the base material film layer is a biaxially oriented polypropylene film. The primer-free pre-coated film prepared by theinvention can be used for well bonding two materials with different properties, and has the advantages of high bonding composite fastness, stable product performance after bonding, no cracking and nodemolding.

Description

technical field [0001] The invention relates to the technical field of precoating films, in particular to a primerless double-sided adhesive layer polypropylene precoating film and a preparation method thereof. Background technique [0002] Pre-coating film technology refers to the process of gluing and rewinding plastic films in advance, and then compounding them with paper prints. Generally, the pre-coating film processing factory first applies hot melt adhesive to the film according to the use specifications and width. Prepare a pre-coated film on the surface, and then compound it with the printed matter. With the diversified development of pre-coated film substrates and hot-melt adhesives, the application field of pre-coated films is no longer limited to paper printed matter, but has also been widely used in commodity packaging, building materials industry and other fields. [0003] With the continuous improvement of human performance and requirements for materials, the...

AI Technical Summary

Problems solved by technology

However, due to the differences in the properties of the materials themselves, the compatibility between the materials is not good, resulting in defects such as delamination and cracking in the process of compounding and use of different types of materials, which cannot give full play to the performance advantages of the materials themselves; therefore, how to improve The bond strength between different types of materials has become a key issue in the application of pre-coating films

For the bonding between polar and non-polar interfaces, the traditional single-layer hot melt adhesive film has poor thickness uniformity, unstable performance during heating and compounding, and prone to overflowing glue; moreover, the traditional pre-prepared In order to improve the adhesion fastness of the pre-coated film, it is usually necessary to coat the surface of the pre-coated film with a primer, which has the problems of high cost and complicated process, and will also have an adverse effect on product quality.