Formaldehyde-free aqueous timber glue and preparation method thereof

Abstract

The invention relates to a flame-retardant waterproof phase-change energy-storage formaldehyde-free solid-wood composite board and a manufacturing method thereof. The flame-retardant waterproof phase-change energy-storage formaldehyde-free solid-wood composite board solves the problem that in the existing composite board manufacture, formaldehyde content of used glue exceeds the limit. The flame-retardant waterproof phase-change energy-storage formaldehyde-free solid-wood composite board has the functions of flame resistance, water resistance and phase-change energy storage. The flame-retardant waterproof phase-change energy-storage formaldehyde-free solid-wood composite board comprises a solid-wood layer and a flame-retardant waterproof phase-change energy-storage layer superposition-compounded to the solid-wood layer by pressure. The flame-retardant waterproof phase-change energy-storage layer comprises expanded perlite, a silica sol solution, plant fibers, calcium carbonate, a penetrant, a fire retardant, a waterproof agent, a pigment and any one of mirabilite, calcium chloride hexahydrate, n-caprylic acid and n-butyl stearate as phase-change materials. The preparation method comprises the following steps of stirring the ingredients to obtain a uniform mixture, paving the mixture, paving a non-woven fabric on the mixture, carrying out rolling by a rolling machine to obtain the flame-retardant waterproof phase-change energy-storage layer board, coating formaldehyde-free aqueous glue on the surface of the flame-retardant waterproof phase-change energy-storage layer, putting the solid-wood layer board on the flame-retardant waterproof phase-change energy-storage layer, putting the boards into a pre-pressing device, carrying out superposition pre-compression treatment on the solid-wood layer and the flame-retardant waterproof phase-change energy-storage layer so that the solid-wood layer tightly clings to the flame-retardant waterproof phase-change energy-storage layer, pushing the compounded board into a hot press, and carrying out hot pressing to obtain the flame-retardant waterproof phase-change energy-storage formaldehyde-free solid-wood composite board. The flame-retardant waterproof phase-change energy-storage formaldehyde-free solid-wood composite board solves the problem that in the existing composite board manufacture, formaldehyde content of used glue exceeds the limit, and has the advantages of energy saving, flame resistance and water resistance.

Description

technical field [0001] The invention relates to a formaldehyde-free water-based wood adhesive which plays a bonding role in the process of processing wood products and a preparation method thereof. Background technique [0002] The artificial boards currently used in the market require the use of a large amount of adhesives for product processing. [0003] In the production process, formaldehyde-containing urea-formaldehyde glue (UF), melamine-formaldehyde glue (MF), modified urea-formaldehyde glue and phenolic glue (PF) are added. Since these glues all use aldehyde compounds, they are made of All finished products will produce volatile formaldehyde, which will be extremely harmful to the human body and pollute the environment. The World Health Organization (WHO) has confirmed that formaldehyde is toxic, carcinogenic, and teratogenic to humans, and these glues, especially the furniture and floors produced by urea-formaldehyde glue , the formaldehyde can be released continuo...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the deficiencies in the prior art and provide a formaldehyde-free water-based wood adhesive and its preparation method that can solve the problem of excessive formaldehyde in the adhesive in the production of plywood.