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Wood board drying process

A technology for wood panels and boards, applied in wood processing appliances, wood treatment, impregnating wood, etc., can solve the problems of wood being prone to mildew and decay, waste of materials, surface cracks, etc., to achieve performance maintenance, prevent cracking, and change permeability. Effect

Inactive Publication Date: 2020-11-24
宿州洛通木业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the deficiencies of the prior art, the present invention provides a wooden board drying process to solve the problem that when the wood interior reaches the drying effect during the drying process, the surface of the wood is over-dried by hot air, and the surface is prone to cracks , causing the thicker layer of wood on the surface to be unusable, wasting materials, and the dried wood is prone to mildew and rot defects in long-term humid environments, etc.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A wooden board drying process, the specific steps are as follows: wood is processed into a board-like material, soaked in a sodium hydroxide solution with a concentration of 1.5mol / L for 20 minutes under high pressure, drained and vacuumed to 100Pa, then the board is taken out, and the board is taken out with a 0.5mol / L sodium hydroxide solution Wash the board with hydrochloric acid at a concentration of L until the pH value of the washing solution reaches 6.5; use 70% ethanol solution to high-pressure impregnate the board for 3-5 hours, take out the board, and let it stand for 24 hours in ventilation; use a flame retardant solution to high-pressure impregnate the board for 2 hours, drain After vacuuming to 100Pa, take out the board, let it stand in ventilation, and dry the residual liquid on the surface; put the board into the dryer, and dry the wood in sections according to the following temperature gradient: bake at 70°C for 2 hours, bake at 80°C for 1.5 hours h, bake...

Embodiment 2

[0026] A wooden board drying process, the specific steps are as follows: process the wood into a board-like material, impregnate it with a 1.8mol / L sodium hydroxide solution under high pressure for 22 minutes, drain the liquid and evacuate to 112Pa, then take out the board, and use 0.6mol / L Wash the plate with hydrochloric acid at a concentration of L until the pH value of the washing solution reaches 6.8; use 72% ethanol solution to high-pressure impregnate the plate for 3.5 hours, take out the plate, and let it stand for 30 hours in ventilation; high-pressure impregnate the plate with a flame retardant solution for 2.5 hours, drain After vacuuming to 113Pa, take out the board, let it stand in ventilation, and dry the residual liquid on the surface; put the board into the dryer, and dry the wood in sections according to the following temperature gradient: bake at 72°C for 2.2h, bake at 82°C 1.8h, bake at 92°C for 1.2h, bake at 112°C for 0.8h, bake at 112°C for 0.6h, after baki...

Embodiment 3

[0028] A wooden board drying process, the specific steps are as follows: process the wood into a board-like material, impregnate it with a sodium hydroxide solution with a concentration of 2mol / L for 25 minutes under high pressure, drain the liquid and evacuate to 105Pa, take out the board, and use 0.75mol / L Wash the plate with concentrated hydrochloric acid until the pH value of the washing solution reaches 7; use 75% ethanol solution to high-pressure impregnate the plate for 4 hours, take out the plate, and let it stand for 36 hours in ventilation; high-pressure impregnate the plate with flame retardant solution for 3 hours, drain and vacuumize After reaching 105Pa, take out the board, let it stand in ventilation, and dry the residual liquid on the surface; put the board into the dryer, and dry the wood in sections according to the following temperature gradient: bake at 75°C for 2.5h, bake at 85°C for 2h, and bake at 95°C Bake for 1.5h at 105°C, 1h at 105°C, and 0.75h at 115...

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PUM

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Abstract

The invention discloses a wood board drying process. Wood is subjected to alkalization, washing, organic solvent soaking and other operation, and the permeability of the wood is changed while the woodis degreased, so that moisture in the wood is easier to evaporate and overflow; the wood is subjected to gradient baking and conventional steam drying, so that the wood is prevented from cracking orthe stress balance in the wood is prevented from being influenced due to sudden temperature change, the performance of the wood is kept longer, and the quality is more excellent; the wood prepared with the process is excellent in various properties; the properties of the wood prepared in a first embodiment to a fifth embodiment are superior to those of commercially available wood of the same type,the stress deviation of the wood reaches 0.62-1.35%, the average bending rate of the wood reaches 0.12-0.31%, and the average dry cracking rate of the wood reaches 2.6-5.8%; and the wood provided ina third embodiment has the best effect, the stress deviation of the wood is only 0.62%, the average bending rate is only 0.12%, and the average dry cracking rate is only 2.6%.

Description

technical field [0001] The invention relates to the field of drying technology, in particular to a drying technology for wooden boards. Background technique [0002] Wood is a renewable natural resource, and wood is a porous material, which can adjust the comfort of people's living environment and is beneficial to people's physical and mental health. Wood drying is a very important process in the wood processing process and is a guarantee And an important link to improve the quality of wood. Through drying treatment, the stability of wood and wood products can be improved, the strength of wood and wood parts can be improved, the degradation and decay of wood can be prevented, and the weight of wood can be reduced. [0003] At present, there are various methods for wood drying. The more common method is to cook the wood first, dissolve and remove the sap inside the tree, and then dry the wood with hot air. Most of them use hot air to heat and evaporate water. to dry. Howev...

Claims

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Application Information

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IPC IPC(8): B27K3/08B27K3/20B27K3/00B27K3/02B27K5/04B27K3/52
CPCB27K3/005B27K3/025B27K3/08B27K3/20B27K3/52B27K5/04B27K2240/30
Inventor 李秀芹
Owner 宿州洛通木业有限公司