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Method for producing wood floor by using lignin adhesive

A technology of lignin glue and wooden floor, which is applied in the field of wood-based panel production, can solve the problems of unqualified adhesive quality, unqualified product quality, and lax law enforcement and supervision, and achieve superior moisture-proof performance, low production cost, and water absorption. Good results

Active Publication Date: 2015-02-18
莫明鑫
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Formaldehyde in wood flooring mainly comes from adhesives. Although the country has established a limit standard for toxic substances in decorative materials, since formaldehyde is commonly used as a raw material in wood floor adhesives, the residual formaldehyde continues to volatilize after board making, causing the formaldehyde content to exceed the standard. , it is not easy to meet the limit requirements. With the gradual improvement of people's safety awareness, the state will have stricter requirements on the formaldehyde limit standards for wooden floors.
[0004] At the same time, the current market competition for wood flooring is becoming increasingly fierce, and the price of adhesives, which are the main raw materials for making wood flooring, tends to be fixed. Problems such as poor quality are becoming more and more serious, seriously affecting people's safety

Method used

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  • Method for producing wood floor by using lignin adhesive
  • Method for producing wood floor by using lignin adhesive

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] The production process of the lignin adhesive is as follows: In order to reduce the cost of raw materials, the pulp black liquor pulped by the alkali cooking method using bagasse as raw material is processed to obtain lignin with a content of more than 85%, and 70wt% lignin is added to the lignin Sulfuric acid, after stirring evenly, heat up to 140-160°C, sulfonation reaction for 1-2 hours; through the central circulation tube evaporator, the circulation speed is 0.4m / s-0.5m / s, and the moisture content of the output is controlled to 30wt% , precipitation, filtered and dried to a water content of 15wt%; add phenol according to lignin:phenol 1:1 (weight ratio), control the temperature at 85-95°C, keep the temperature for 1 hour, and finally adjust the pH with 30wt% sodium hydroxide to 6.5-7.0; take 40-60 parts of the obtained reactant; add 15-20 parts of potato starch; 1-5 parts of silane coupling agent; 8-15 parts of high temperature resistant filler; Then use a three-ro...

Embodiment 2

[0022] Select veneers of the same size, and coat the veneer with the lignin adhesive prepared in Example 1, with a sizing rate of 250g / m 2 , pre-pressing, the conditions are: temperature: 100°C, pressure: 0.7Kpa, time: 0.6min / mm; hot pressing, the conditions are: temperature: 150°C, pressure: 0.8Kpa, time: 0.7min / mm; stacking maintenance, The specific method is: at room temperature, set up the bonded wooden floor layer by layer with wooden strips, and the upper and lower layers of wooden strips are arranged in the shape of a "well" for 28 hours; use coarse sand and fine sandpaper to polish and determine the thickness. Paste the low wood surface, polish the wood surface, paste the aluminum oxide wear-resistant paper on the wood surface, hot press at a temperature of 170°C and a pressure of 2.0MPa, heat dissipation finishing, and edge beating.

Embodiment 3

[0024] Select veneers of the same size, and coat the veneer with the lignin adhesive prepared in Example 1, with a sizing amount of 280g / m 2 , pre-pressing, the conditions are: temperature: 100°C, pressure: 0.8Kpa, time: 0.8min / mm; hot pressing, the conditions are: temperature: 150°C, pressure: 1.0Kpa, time: 0.9min / mm; stacking maintenance, The specific method is: at room temperature, set up the bonded wooden floor layer by layer with wooden strips, and the upper and lower layers of wooden strips are arranged in the shape of a "well" for 30 hours; use coarse sand and fine sandpaper to polish and determine the thickness, Paste the low wood surface, polish the wood surface, paste the aluminum oxide wear-resistant paper on the wood surface, heat press at a temperature of 170°C, and a pressure of 2.5MPa, heat dissipation finishing, and edge beating.

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Abstract

The invention discloses a method for producing a wood floor by using a lignin adhesive. The wood floor is manufactured by bonding at least two layers of veneers through the lignin adhesive. The method comprises the steps of veneer sorting, gluing, prepressing, hot pressing, piling for preserving life and attaching of aluminum oxide wear-resistant paper, wherein the prepressing is performed at the temperature of 95-100 DEG C under the pressure of 0.5-0.8Kpa for 0.5-0.8min / mm; the hot pressing is performed at the temperature of 140-150 DEG C under the pressure of 0.5-1Kpa for 0.5-0.8min / mm; the piling for preserving life is implemented by erecting bonded wood floors by using battens layer after layer, and two layers of wood battens are arranged in a # form. The wood floor manufactured by using the method has high temperature resistance, and is not bubbled or deformed in the presence of water and in case of dampening; the cost of the adhesive used in each square meter is low, and high application and popularization values are achieved.

Description

technical field [0001] The invention relates to a method for producing wood-based panels, in particular to a method for producing wooden floors by using lignin adhesives. Background technique [0002] Wood floor refers to the floor made of wood. The wood floor produced in China is mainly divided into six categories: solid wood floor, laminate floor, solid wood composite floor, bamboo floor and cork floor. In 2010, the sales volume of my country's flooring manufacturers was about 399 million m 2 , an increase of 9.6% year-on-year. Among them, the sales volume of laminate flooring is about 238 million m 2 , a year-on-year increase of 12.3%; solid wood flooring is about 43 million m 2 , a year-on-year increase of 2.4%; solid wood composite flooring is about 89 million m 2 , a year-on-year increase of 7.2%; bamboo flooring is about 25.3 million m 2 , an increase of 1.2% year-on-year; other floors are about 3.2 million m2, an increase of 45% year-on-year. In the domestic wo...

Claims

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Application Information

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IPC IPC(8): B27D1/04C09J197/00C09J103/02C09J11/06C09J11/04C08H7/00
CPCB27D1/04C08L2201/08C09J11/04C09J11/06C09J197/00C08L3/02C08K13/02C08K5/54
Inventor 肖文飞王飞虎谢振能
Owner 莫明鑫
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