Production process of multilayer solid wood composite floor with high-water-content veneer veneering

Abstract

The invention belongs to the technical field of building materials, and relates to a production process of a multilayer solid wood composite floor with a high-water-content wood veneer veneering. The process comprises the following steps of gluing and veneering, cold pressing, hot pressing, balanced curing, cutting, primer coating, forming, finish coating and finished product packaging, in the gluing and veneering process, the surface of a criss-cross multilayer board base material is coated with melamine-modified urea resin glue, the single-face glue applying amount is 80-130 g / m < 2 >, a layer of hard broadleaf wood veneer / wood veneer with the high water content is pasted after glue applying, the water content ranges from 10% to 20%, and the thickness ranges from 0.6 mm to 2.0 mm. Adjusting and improving are carried out on an existing production process, the production process is simple, the cost is low, dry energy is saved, the moisture return phenomenon caused by large rainwater, water content difference of various regions and the like in the transportation process is avoided, the high-water-content wood veneer is fully utilized, and existing forest resources are saved; and the prepared floor has no problems of buckling deformation, tile bending or cracking and the like, and the physical and mechanical properties meet the requirements of various indexes.

Description

technical field [0001] The invention belongs to the technical field of building materials and relates to the production of solid wood floors, in particular to a production process for multi-layer solid wood composite floors with high moisture content veneer veneers. Background technique [0002] Multi-layer solid wood composite flooring is made of natural precious tree species veneer (wood veneer) of different thicknesses as the surface layer, plywood made of solid wood veneer with criss-cross textures as the base material, coated with high-performance, high wear-resistant, high-environmental protection UV It is made of special paint for light-cured floors, and is widely used in the home building materials industry. However, with the shortage of forest resources, the resource limitation of solid wood composite flooring increases, especially the hard broad-leaved tree species selected from decades or even hundreds of years, and the available resources decrease rapidly. Raw m...

AI Technical Summary

Problems solved by technology

If the moisture content of the wood is too low when glued, the glue will easily penetrate into the interior of the wood in large quantities, resulting in a lack of glue on the glued surface

[0004] In the production process of plywood, the moisture content is generally controlled within the range of 8 to 15%. Not only does it consume a lot of energy when drying the board, but also the board will inevitably produce drying defects during drying, resulting in unnecessary waste

However, when gluing veneers with high moisture content, the following situations are prone to occur: poor preloading performance, reduced bonding strength, glue penetration, increased bubbling rate, and easy warping of plywood, etc.

[0005] In actual production, the moisture content of the veneer is the key factor affecting the performance of the board. At present, there are still problems such as warping and cracking in the production of multi-layer solid wood composite flooring with a relatively high moisture content (10-20%). There are still some problems in the existing technical methods. series of instabilities