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Preparation technology of formaldehyde-free multi-layer solid-wood composite floor

A technology of solid wood composite flooring and preparation technology, which is applied in the field of flooring manufacturing, can solve the problems of high molecular activity, affecting normal use, and variability, and achieve the effects of long opening time of resin, easy production, and easy operation

Inactive Publication Date: 2020-07-24
圣象(江苏)木业研究有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the formaldehyde-free adhesives used in the manufacture of multi-layer solid wood composite flooring mainly include soybean glue and EPI (water-based polymer-isocyanate), etc. Inconvenient and not very practical; especially EPI, its molecular activity is high, it is easy to react with moisture in the air, and it is variable during production and affects normal use

Method used

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  • Preparation technology of formaldehyde-free multi-layer solid-wood composite floor
  • Preparation technology of formaldehyde-free multi-layer solid-wood composite floor
  • Preparation technology of formaldehyde-free multi-layer solid-wood composite floor

Examples

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Effect test

Embodiment 1

[0030] A preparation process for formaldehyde-free multi-layer solid wood composite flooring, comprising the following steps:

[0031] (1) Glue adjustment: mix the natural polymer resin adhesive: flour = 100:40 mass ratio for 15 minutes and mix evenly. The natural polymer resin adhesive used is self-made, and its ingredients are lignin, potassium hydroxide, melamine , carboxymethylcellulose, urea and water, the mass percent of each component is 35%, 4.5%, 3.7%, 1.2%, 2.8% and 52.8%;

[0032] (2) Glue sizing for substrate assembly: Arrange the wooden veneers with a thickness of 2.2mm and 1.7mm in a criss-cross pattern, and the amount of glue applied is 180g / m 2 ;

[0033] (3) Cold pressing and hot pressing: cold press the assembled slab first, and then hot press, wherein the cold pressing pressure is 1.0MPa, the time is 30min; the hot pressing pressure is 1.1MPa, the hot pressing efficiency is 70s / min, and the hot pressing Temperature 140°C;

[0034] (4) Substrate post-proce...

Embodiment 2

[0039] A method for manufacturing formaldehyde-free multi-layer solid wood composite flooring, specifically comprising the following steps:

[0040] (1) Glue adjustment: mix the natural polymer resin adhesive: flour = 100:40 mass ratio for 15 minutes and mix evenly. The natural polymer resin adhesive used is self-made, and its ingredients are lignin, potassium hydroxide, melamine , carboxymethyl cellulose, urea and water, the weight percentage of each component is 35%, 4.5%, 3.7%, 1.2%, 2.8% and 52.8%;

[0041] (2) Glue sizing for substrate assembly: Arrange the wooden veneers with a thickness of 2.2mm and 1.7mm in a criss-cross pattern, and the amount of glue applied is 180g / m 2 ;

[0042] (3) Cold pressing and hot pressing: cold press the assembled slab first, and then hot press, wherein the cold pressing pressure is 1.0MPa, the time is 30min; the hot pressing pressure is 1.1MPa, the hot pressing efficiency is 70s / min, and the hot pressing Temperature 140°C;

[0043] (4) ...

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Abstract

The invention belongs to the technical field of floor manufacturing, and relates to production of solid-wood composite floors, in particular to a preparation technology of a formaldehyde-free multi-layer solid-wood composite floor. The technology includes the following steps that the surface of wood veneer having the thickness ranging from 1.0 mm to 3.0 mm is coated with a formaldehyde-free glue solution, and assembly is performed in such a manner that textures of adjacent layers of the wood veneer are arranged in a crisscross manner; the assembled wood veneer is subjected to cold pressing andthen hot pressing, a slab is formed, and a multi-layer hard wood base material layer is prepared through ash scraping, edge cutting and sanding; after double-side coating or single-side coating withthe formaldehyde-free glue solution, a precious hard wood decoration layer and a hard wood bottom plate layer are attached to the upper and lower surfaces of the base material layer respectively, andcold pressing, hot pressing, reconditioning, sanding, thickness fixing, cutting, slotting, paint coating, inspection and packaging for storage are performed. The formaldehyde-free glue solution used in the technology is long in opening time and easy to operate; the prepared formaldehyde-free multi-layer solid-wood composite floor can resist boiling water cooking for 2 h and is free from chipping after baking in a baking oven at 63 DEG C for 3 h, the formaldehyde releasing amount is less than 0.03 mg / m<3>, and the standard requirements of Formaldehyde-free Artificial Boards and Products Thereofare met.

Description

technical field [0001] The invention belongs to the technical field of floor manufacturing, and relates to the production of solid wood composite floor, in particular to a preparation process of formaldehyde-free multi-layer solid wood composite floor. Background technique [0002] In recent years, multi-layer solid wood composite flooring has been favored by most consumers with its full natural style and relatively low price, and has gradually become the mainstream product in the wooden floor market. With the development of society and the improvement of people's living standards, multi-layer solid wood composite flooring is more and more popular among the public. Most of the adhesives used in the production of multi-layer solid wood composite flooring are "trialdehyde" adhesives, namely urea-formaldehyde, phenolic, and melamine-formaldehyde adhesives. The formaldehyde pollution caused by them has become a major pain point in today's home decoration and building materials i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B27M3/04B27D1/08C09J197/00C09J199/00C09J11/08C09J11/06
CPCB27D1/08B27M3/04C08L2205/03C09J11/06C09J11/08C09J197/005C08L1/286C08L99/00C08K5/34922
Inventor 赵保成姜志华王素鹏范文明贡红霞袁同琦
Owner 圣象(江苏)木业研究有限公司
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