Adhesive composition for plywood and preparation process of adhesive composition

Abstract

The invention relates to the technical field of adhesives, in particular to an adhesive composition for plywood and a preparation process of the adhesive composition. The adhesive composition comprises the following substances in parts by mass: 150-180 parts of water, 25-35 parts of polyvinyl alcohol, 12-15 parts of bentonite, 10-15 parts of a preservative, 0.5-1.5 parts of rosin resin, 0.2-1.5 parts of an organic silicane modifier, 1.2-3.6 parts of epoxy resin, 1.5-3.6 parts of sodium alginate, 5-10 parts of a foaming agent, and 20-30 parts of a filler; the pH value of the adhesive composition is 3-5. The adhesive composition and the preparation process have the benefits that the use of toxic substances such as formaldehyde, benzene and methylbenzene is avoided, the requirement of people on green building materials and costly furniture in house decoration is met, the adhesive composition is suitable for people requirements, the artificial playwood produced by the adhesive composition can achieve the purposes of being complete innocuous and nontoxic, and environmentally friendly. During the production process, environment pollution is avoided, and the curing time of the adhesive composition is short, and the effective life is long.

Description

technical field [0001] The invention relates to the technical field of adhesives, in particular to an adhesive composition for plywood and a preparation process thereof. Background technique [0002] At present, the adhesives used in plywood production are still mainly formaldehyde-based adhesives. Among them, phenolic resin adhesives are mostly used to produce outdoor type I plywood, and urea-formaldehyde resin adhesives are mostly used to produce indoor type II plywood. In the process of production and use, free formaldehyde will be released from the connected products, which will endanger people's health. As consumers' awareness of environmental protection is increasing, the production of formaldehyde-based adhesives, especially urea-formaldehyde resin adhesives for bonding indoor products, is under pressure. increasingly strict restrictions. The release of harmful formaldehyde gas can be reduced by improving the production process of urea-formaldehyde resin glue, or ado...

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Problems solved by technology

[0002] At present, the adhesives used in plywood production are still mainly formaldehyde-based adhesives, of which phenolic resin adhesives are mostly used to produce outdoor type I plywood, and urea-formaldehyde resin adhesives are mostly used to produce indoor type II plywood. In the process of production and use, free formaldehyde will be released from the connected products, which will endanger people's health. As consumers' awareness of environmental protection is increasing, the production of formaldehyde-based adhesives, especially urea-formaldehyde resin adhesives for bonding indoor products, is subject to increasingly strict restrictions

The release of harmful formaldehyde gas can be reduced by improving the production process of urea-formaldehyde resin glue, or adopting appropriate post-treatment methods for the bonded products, but this not only increases the cost, but also cannot comple

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