Sprayable environmentally friendly hot melt adhesive 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] During the use of 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 so on, play the effect of getting twice the result with half the effort, spray glue has been widely used in thick leather, genuine leather, imitation leather, recycled leather, sponge, cloth, wood, metal, stone, shoe materials and other materials; the Chinese market is currently It is still mainly used in low-end solvent-based spray glue applications. A large amount of organic solvents, including toxic halogenated hydrocarbons and triphenyl (benzene, toluene, xylene) solvents, enter the air during construction, which consumes a large amount of increasingly tense petroleum oil resources. , and seriously affect people's living environment and health; although the country began to implement the national standard GB 18583-2008 (mandatory limit standard for harmful substances in adhesives for interior decoration and decoration materials) on September 1, 2009, for triphenyl and halogen The limit of substituted hydrocarbons is still too loose, for example: toluene + xylene ≤ 15%, low-toxic halogenated hydrocarbon methylene chloride ≤ 5%, according to the high standards of environmental protection in Western developed countries such as Europe, America and Japan, GB 18583-2008 National standards are not enough

[0003]Although the national environmental protection department and the National Benzene, halogenated hydrocarbons, acetone, etc. have stricter limits, 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 the solvent-based adhesives that meet the environmental standard certification still have relatively large VOC emissions, and the standard limit is VOC ≤ 750g / L (the limit is too loose). Type spray glue is not the most environmentally friendly adhesive product at present, and some high-end fields are still difficult to meet the high environmental protection standards of zero VOC in Western developed countries such as Europe, America and Japan. The "product structure optimization and upgrading" plan, one of the overall development goals in the "Twelfth Five-Year Plan" development plan of the adhesive tape industry, 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 The development of water-based, hot-melt and other environmentally friendly and environmentally friendly high-function adhesives, so the development of solvent-free and 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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