Production process of core plate for joinery plate

Abstract

The production process of core plate for joinery plate includes the steps of: producing lathes in the same thickness, splicing lathes closely to form plate blank, and painting formaldehyde eliminating agent to the sides of the lathes before splicing and painting adhesive with added formaldehyde eliminating agent to the sides of the spliced lathes. The core plate produced through the process has the advantage of the formaldehyde eliminating function to reach the E1 environment protection standard and no obvious adhesion strength degradation.

Description

technical field [0001] The invention relates to a method for preparing boards used for wood-based panels, in particular to a method for preparing core boards used for blockboards. Background technique [0002] With the continuous improvement of people's living standards, decoration and purchase of new furniture have become common things in people's lives. Blockboard has been widely used due to its characteristics of simple product manufacturing, less equipment investment, good product comprehensive performance, and low price. Blockboards are mostly made of formaldehyde-based adhesives, mainly urea-formaldehyde resin adhesives, which have the problem of formaldehyde release and often become the main source of formaldehyde pollution in indoor air. [0003] Formaldehyde is a highly toxic substance, and it ranks second on the list of priority control of toxic chemicals in my country. Formaldehyde is irritating to the eyes, mucous membranes and respiratory tract, and can cause ...

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; the curing time is prolonged and the production efficiency is reduced; 2) the use of other Environmentally friendly adhesives, such as isocyanate adhesives, often lead to a substantial increase in the production cost of wood-based panels, which is difficult for enterprises and users to accept; 3) Adding formaldehyde scavenger to the urea-formaldehyde resin adhesive for wood-based panels can effectively reduce free formaldehyde in wood-based panels. release amount, but often reduce the gluing strength of wood-based panels simultaneously; 4) carry out post-treatment to wood-based panels, as the invention patent application with publication number CN1526528A discloses a kind of manufacturing process of E1 / EO grade environment-friendly type wood-based panels using ammonia gas Vacuum method, the utility model patent with the publication number CN2394770Y discloses a treatment device for reducing the release of formaldehyde from wood-based panels. Although these measures can effectively reduce the release of free formaldehyde from wood-based panels, the investment in post-processing equipment is often large.