Aldehyde-free liquid glue and artificial board processing method

Abstract

The invention relates to aldehyde-free liquid glue and an artificial board processing method. The liquid glue is prepared by mixing and blending an magnesium chloride aqueous solution and magnesium oxide powder, serving as inorganic materials, according to the ratio of 1: 1; the magnesium chloride aqueous solution is prepared from magnesium chloride powder or halogen pieces and water according to the ratio of 1: 1 to 1: 3, and the purity of the magnesium chloride powder or the halogen pieces is 45% to 99%. Therefore, the liquid glue does not contain formaldehyde, also has favorable gluing strength, is low in price and can also be directly applied to existing mechanical equipment to process artificial boards, without adding or transforming original mechanical equipment, and also without changing an operation mode of longtime habit. The liquid glue is easily accepted by artificial board manufacturers, high in market competitiveness and easily promoted and sold; in addition, when the liquid glue is used for manufacturing the artificial boards, the artificial boards can be directly subjected to hot pressing after coated with the aldehyde-free liquid glue, without undergoing cold pressing, so that the processing procedures are simplified, the production efficiency is high, and meanwhile, the hot pressing temperature is relatively low, the energy consumption is reduced and the production cost is lower.

Description

technical field [0001] The invention belongs to the technical field of adhesives and wood-based panels, and in particular relates to an aldehyde-free liquid adhesive and a wood-based panel processing method. Background technique [0002] With the rise of human economic development and environmental awareness, regulations and requirements for formaldehyde emission of various wood-based panels (including plywood, particleboard, fiberboard and blockboard) around the world, especially in developed countries and developing countries, are becoming more and more serious. Therefore, relevant experts and scholars are also trying to develop various low-formaldehyde or zero-formaldehyde wood-based panel manufacturing methods and related adhesives. [0003] As we all know, most of the synthetic resin glues (such as urea-formaldehyde resin, melamine resin and phenolic resin) used in the manufacture of multi-layer plywood, particleboard, fiberboard and other wood-based panels for decades ...

AI Technical Summary

Problems solved by technology

These adhesives have their own advantages and disadvantages: bean glue is cheap, but its bonding strength and waterproof performance are poor; MDI series adhesives have good bonding strength, but are expensive and difficult to handle when used; The bonding strength is good and the price is not expensive. However, in mass production, automatic production has not yet been formed so far, resulting in low efficiency