Adhesive for artificial board and preparation method of adhesive

Abstract

The invention relates to an adhesive for an artificial board and a preparation method of the adhesive. The adhesive consists of the following raw materials: a dispersing medium, defatted protein powder, sodium carbonate, a complexing agent and a reinforcing agent, wherein the complexing agent is composed of zinc chloride, copper sulfate and zirconium carbonate; and the reinforcing agent is ethylene-vinyl acetate copolymer (EVA) powder. According to the adhesive, the problem that the common soybean protein adhesive is poor in water resistance is solved, and the water resistance demand of the adhesive for the artificial board is met; and the adhesive is lower in curing temperature, faster in curing speed, easier in application and high in binding strength, and the industrial production is easy to realize.

Description

technical field [0001] The invention relates to an adhesive, in particular to an adhesive for wood-based panels and a preparation method thereof. Background technique [0002] With the rapid development of construction, decoration, packaging and other industries, the output of wood-based panels in my country has increased rapidly. In 2010, the total output of my country's wood-based panels was 153.6 million cubic meters, accounting for about 50% of the world's weight, including 71.3966 million cubic meters of plywood and 16.5228 million cubic meters of blockboard. The total output of wood-based panels, plywood, furniture, and wood flooring has ranked first in the world for many years in a row. [0003] The adhesives commonly used in the production of wood-based panels are formaldehyde-based synthetic resins, mainly urea-formaldehyde resins and their modified products. Although after years of hard work, the production level of wood-based panel adhesives in my country has be...

AI Technical Summary

Problems solved by technology

For example: 1) Although the use of a low molar ratio modified urea-formaldehyde resin adhesive can effectively reduce the formaldehyde emission of wood-based panel products, the bonding strength of the product is often reduced, which cannot meet the requirements of use; and the curing time is prolonged and the production efficiency is reduced; 2) The use of other environmentally friendly adhesives, such as isocyanate adhesives, has led to a substantial increase in the production cost of wood-based panels, which is difficult for enterprises and users to accept; the wood-based panels prepared with ordinary protein adhesives have low bonding strength, and the wood-based panels are easy to open; 3) In artificial Adding formaldehyde scavenger to the urea-formaldehyde resin adhesive for boards can effectively reduce the release of free formaldehyde from wood-based panels, but it often reduces the bonding strength of wood-based panels; at the same time, the price of general formaldehyde scavenger is often much higher than that of urea-formaldehyde resin adhesives. Just improved product cost, reduced product competitiveness; 4) carry out post-processing to wood-based panel, disclose a kind of adopting ammonia gas vacuum method to prepare E1 / EO level environment-friendly type wood-based panel in the invention patent application of CN1526528 as publication number Manufacturing process; the utility model patent with publication number CN2394770 discloses a treatment device for reducing formaldehyde emission from wood-based panels. These post-processing methods not only make the manufacturing process of wood-based panels complicated, but also require huge investment in post-processing equipment and significant production costs. improve

In summary, although the above measures can effectively reduce the release of free formaldehyde from wood-based panels, they cannot completely solve the problem of formaldehyde release, or cannot be popularized due to reasons such as high production costs.

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