Sprayable environment-friendly hot melt glue and preparation method thereof

Abstract

The invention discloses sprayable environment-friendly hot melt glue and a preparation method thereof. The spray glue mainly comprises the following components in percentage by weight: 12% of EVA thermoplastic resin with melting index 30, 18% of EVA thermoplastic resin with melting index 65, 10% of water-white rosin, 12% of water-white hydrogenated rosin, 8% of C9 petroleum resin, 14.5% of white tackifying resin, 5% of polyisobutene and 8% of microcrystalline wax. The sprayable environment-friendly hot melt glue disclosed by the invention has comprehensive advantages in multiple aspects such as environmental friendliness and no toxin, no organic solvent, zero VOC, no heavy metal or odor, good initial viscous force, high bonding strength, high permanent adhesion, heat and aging resistance, high drying speed, large spray area of unit weight (saving glue) and efficient and quick spraying construction, and has the advantages of complete environmental friendliness, improvement of the operation and construction environment, low cost, no odor, fire safety and the like, and is widely applied to the upholstered furniture industries such as sofa, swivel chairs, mattress, pillows and screens and especially applicable to the European and American environment-friendly high-grade exported products and children products.

Description

technical field [0001] The present invention relates to an adhesive and its preparation method, more specifically to an environmentally friendly thermal sol that can be used for spraying and its preparation method, which can be widely used in sofas, mattress boxes, bags, swivel chairs, pillows, screens and other software Furniture industry, especially for sofa and mattress industry. Background technique [0002] In the process of using the existing adhesives, the construction method of spraying is often more time-saving, labor-saving, glue-saving, and efficient than the traditional brushing construction method, and has the effect of getting twice the result with half the effort. Spraying glue is now widely used For the bonding between thick leather, genuine leather, imitation leather, regenerated leather, sponge, cloth, wood, metal, stone, shoe materials and other materials; the Chinese market is still dominated by medium and low-end solvent-based spray glue applications, an...

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Problems solved by technology

[0002] In the process of using the existing adhesives, the construction method of spraying is often more time-saving, labor-saving, glue-saving, and efficient than the traditional brushing construction method, and has the effect of getting twice the result with half the effort. Spraying glue is now widely used For the bonding between thick leather, genuine leather, imitation leather, regenerated leather, sponge, cloth, wood, metal, stone, shoe materials and other materials; the Chinese market is still dominated by medium and low-end solvent-based spray glue applications, and a large number of organic Solvents including toxic halogenated hydrocarbons and triphenyl (benzene, toluene, xylene) solvents enter the air during construction, which not only consumes a large amount of increasingly tense petroleum oil resources, but also seriously affects people's living environment and health; The national standard GB 18583-2008 (mandatory limit standard for harmful substances in adhesives for interior decoration materials) began to be implemented on September 1, 2008, but the limit for triphenyl and halogenated hydrocarbons is still too loose, for example: toluene + xylene ≤ 15%, low-toxic halogenated hydrocarbon dichloromethane ≤ 5%, according to the high standards of environmental protection in Western developed countries such as Europe, America and Japan, the national standard of GB 18583-2008 is far from enough

[0003] Although the national environmental protection department and the National Standards Committee have issued more stringent environmental protection standards, the technical requirements for the certification of adhesive environmental labeling products HJ / T 220-2005, the focus is on stricter limits for triphenyl, halogenated hydrocarbons, acetone, etc. , for example: pure benzene ≤ 0.2%, toluene + xylene ≤ 0.2%, halogenated hydrocarbons ≤ 0.2%, acetone ≤ 0.75‰, heavy metals (lead, cadmium, mercury, chromium) ≤ 0.5‰, etc., but meet the environmental standard certification Solvent-based adhesives still have relatively large VOC emissions, and the standard limit is VOC≤750g / L (the limit is too loose). Therefore, solvent-based spray adhesives that meet the environmental labeling product standards are not currently the most environmentally friendly adhesive products. Some high-end fields It is still difficult to meet the high environmental protection standards of zero VOC in Western developed countries such as Europe, America and Japan. It should meet the strong requirements of international and domestic high-end environmental protection fields, and at the same time follow the overall development goals in the "12th Five-Year" development plan of China's synthetic adhesive and adhesive tape industry. One of the "product structure optimization and upgrading" plans, during the "Twelfth Five-Year Plan" period, China will eliminate some products with backward production capacity and high content of toxic and harmful substances, and vigorously develop water-based, hot-melt and other environmentally friendly and environmentally friendly high-function products Adhesives, so the development of solvent-free completely environmentally friendly new sprayable hot-melt adhesives has become an urgent requirement and a top priority for the progress of the times

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