A kind of hot water soluble hot melt adhesive and its application

Abstract

The invention discloses hot-water-dissolution type hot melt adhesive. The hot-water-dissolution type hot melt adhesive comprises 20-65% of polyvinyl alcohol, 20-50% of matrix resin, 3-25% of tackifying resin, 10-50% of plasticizer, 0-10% of filler and 2-5% of functional auxiliaries. The hot melt adhesive has the advantages that the hot melt adhesive is solid under normal temperature, the hot melt adhesive can have the adhesive ability when being heated to a softening point, the hot melt adhesive is resistant to normal-temperature water and can be dissolved and removed in high-temperature water of 60-95 DEG C, and the hot melt adhesive is special in performance and widely applicable. The invention further discloses a shielding structure manufactured by the hot-water-dissolution type hot melt adhesive and electrophoresis process using the shielding structure. Compared with traditional shielding ink, the shielding structure has the advantages that the shielding structure is easy in removing method, strong base or other corrosive substances are not needed, and influence on a paint film structure is avoided; various patterns can be formed according to needs, and simpleness in manufacturing process is achieved.

Description

technical field [0001] The invention relates to the field of polymer materials, in particular to a hot water soluble hot melt adhesive and its application. Background technique [0002] The monotonous metallic or single-color paint surface of metal products can no longer meet people's needs for diversified product appearance. Therefore, while protecting the surface of metal products, a colorful decorative pattern appearance is formed to manufacture decorative products and unify the style with other parts High-quality products or novel and beautiful products are gradually being valued, and their production processes are also developing day by day. [0003] The existing pattern appearance production methods include surface spray coating, thermal transfer pattern, printing, etc. The decorative ink layer in these methods is separated from the primer, and only exists on the surface of the product without penetrating the primer, which is very easy to be damaged due to wear and tea...

AI Technical Summary

Problems solved by technology

The existing inks have the following disadvantages: 1. Most of them are solvent-based, containing a large amount of volatile solvents that pollute the production environment; 2. The ink is easy to dry during the printing process, and the solvent needs to be continuously replenished, and the process is complicated during use; 3. It needs to be cured, the curing speed is slow, and the process complexity and equipment investment are increased; 4. The screen design is cumbersome and has a certain life; 5. When cleaning the ink, strong alkali or other corrosive substances must be used as cleaning agents, and the cleaning process is complicated And it will cause damage to the front electrophoretic film layer, thus greatly affecting its performance and appearance, and affecting the decorative effect