RESEARCH ON THE POLYURETHANE ACRYLATE COMPOSITE EMULSION APPLYING TO THE PRECOATED ADHESIVE FILM OF PAPER PLASTIC LAMINATING

摘要

The production of precoated adhesive film of paper plastic laminating is usually realized by coating the EVA hot melt adhesive to the BOPP based on the gravure printing, but the coating of this kind of precoated adhesive film is made of screen dot and it will affect the brightness and transparency in application. In order to solve this problem, we used the method of coating continuous and uniform hot melt adhesive to the EVA hot melt layer which is made of screen dot. This paper studied the application of mechanics and characteristics of the polyurethane acrylate composite emulsion to the precoated adhesive film of paper plastic laminating, and presented the synthesis process and batch formula of polyurethane modifying acrylic copolymer emulsion, and the physical properties of the copolymer emulsion was tested by infrared spectroscopy (IR), particle size analysis, gel permeation chromatography (GPC). According to the mixing of the waterborne polyurethane acrylate emulsion with the waterborne rosin emulsion, we obtained the hot melt precoated adhesive. The experimental results based on the physical properties and image analysis of the precoated adhesive film of paper plastic laminating showed that: the adhesive film coated by this hot melt adhesive had a high gloss and adhesive force, and it improved the application performance of the precoated adhesive film of paper and plastic laminating in the printing and packaging industry.