A kind of formaldehyde-free liquid adhesive and wood-based panel processing method

Abstract

The invention relates to a aldehyde-free liquid adhesive and a wood-based panel processing method. The liquid adhesive is prepared by mixing magnesium chloride aqueous solution and magnesium oxide powder of inorganic materials in a ratio of 1:1; the magnesium chloride aqueous solution is made of magnesium chloride powder or halogenated Tablets and water are prepared according to the ratio of 1:1 to 1:3, and the purity of magnesium chloride powder or halogen flakes is 45% to 99%. In this way, the liquid adhesive does not contain formaldehyde, but also has good bonding strength, and the price is extremely low. It can also be directly applied to existing mechanical equipment to process wood-based panels, without adding or modifying old mechanical equipment, and without changing long-term habitual operations. The model is easy to be accepted by wood-based panel manufacturers, has strong market competitiveness, and is easy to promote and sell; and when used in the manufacture of wood-based panels, it can be directly hot-pressed after coating the formaldehyde-free liquid adhesive, without cold pressing, and the processing process is simplified. , higher production efficiency, lower hot pressing temperature, less energy consumption and lower production cost.

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