Washable hot melt adhesive and application thereof

Abstract

The invention discloses a washable hot melt adhesive and application thereof. The hot melt adhesive is composed of the following raw materials by mass percentage: 30-80% of high-acid value resin; 0-40% of a plasticizer; 10-40% of a thermoplastic high polymer; and 0-1% of an antioxidant. The hot melt adhesive provided by the invention selects high-acid value resin as the tackifier, which contains carboxyl or hydroxyl and other hydrophilic functional groups, and can rapidly react with alkaline water so as to destroy the structure of the hot melt adhesive and lower the stripping force of the hot melt adhesive. The hot melt adhesive is partially dissolved and dispersed into small solid particles so as to completely break away from an adherend, thus being easily removed from the surfaces of PET, PP, PE, glass, ceramics, metals, leather, wood, paper products, plastic products, textile products or others. The washable hot melt adhesive provided by the invention has the bonding performance of conventional hot melt adhesives, and has the advantages of strong initial adhesion, environmental protection and safety, the preparation process is simple, the requirements for the process and equipment are low, the production efficiency is high, and the production cost is low.

Description

technical field [0001] The invention relates to a washable hot melt adhesive and its application. Background technique [0002] Waste recycling is a global environmental protection topic, and it is also a focus of general attention in various industries. Governments around the world have introduced various incentive policies to promote waste recycling. The recycling and reuse of packaging materials has a huge market, such as the recycling of paper products, the recycling of bottled and filled beverage packaging materials, etc. Hot melt adhesive is a solvent-free solid adhesive based on thermoplastic polymers. It has the advantages of rapid bonding, wide application, non-toxicity, and pollution-free. Its packaging and freight costs are low, and it does not need to be used when using it. Drying equipment for drying, easy to bond impermeable surface objects, can achieve the required bonding strength in a short time, good storage stability, continuous film, widely used in the ...

AI Technical Summary

Problems solved by technology

Starch-based adhesives have the advantages of wide range of raw materials, cheap, non-toxic, and good water resistance, but there are deficiencies in initial tack, bonding strength, drying speed, and cleanability; although polyvinyl alcohol adhesives have strong adhesion, It is easier to clean, but the toxic substance formaldehyde may be used in the modification process, which poses a potential threat to the environment and human health; casein-based adhesives have strong initial viscosity, good water resistance, and are easy to clean, but they are expensive and not available in the market. Stable, which limits its wide application

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