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Hot press drying method for wood

A drying method and wood technology, applied in wood drying, wood treatment, impregnation of wood, etc., can solve the problems of easy warping, large deformation, soft material, etc., achieve low moisture absorption characteristics, increase density, flexural strength, and stability Good results

Inactive Publication Date: 2017-01-04
FUNAN XINGGUANG ARTS & CRAFTS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, in order to alleviate the contradiction between supply and demand of wood, my country has vigorously developed artificial timber forests in recent years. Although these tree species grow fast, they generally have disadvantages such as soft material, low strength, easy warping, and large deformation, and their poor materials are difficult to adapt to the market. need

Method used

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  • Hot press drying method for wood

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] A wood hot pressing drying method, characterized in that it comprises the following steps:

[0014] (1) Soak the wood in the soaking solution for 1 hour, and then dry the wood in a ventilated place. The temperature of the soaking solution is 20°C, and the soaking solution is composed of the following components by weight: 4 parts of sodium nitrate, α -6 parts of sulfo fatty acid methyl ester disodium salt, 10 parts of sodium polyacrylate, 3 parts of sodium succinate, 9 parts of sodium citrate, 150 parts of water;

[0015] (2) Steam the wood for 2 hours at 100°C and 100% relative humidity, and then ultrasonically treat the wood for 30 minutes;

[0016] (3) Put the wood in a hot press, and dry it by hot pressing at a temperature of 130°C and a pressure of 0.5 MPa for 20 minutes.

[0017] The soaking solution in the above step (1) is made by the following method: add sodium nitrate, α-sulfo fatty acid methyl ester disodium salt, sodium polyacrylate, sodium succinate, and sodium ci...

Embodiment 2

[0019] A wood hot pressing drying method, characterized in that it comprises the following steps:

[0020] (1) Soak the wood in the soaking solution for 1.5 hours, and then dry the wood in a ventilated place. The temperature of the soaking solution is 22°C. The soaking solution is composed of the following components by weight: 5 parts of sodium nitrate, α -7 parts of sulfo fatty acid methyl ester disodium salt, 11 parts of sodium polyacrylate, 4 parts of sodium succinate, 10 parts of sodium citrate, 180 parts of water;

[0021] (2) Steam the wood for 2.5 hours at 100°C and 100% relative humidity, and then ultrasonically treat the wood for 40 minutes;

[0022] (3) Put the wood in a hot press, and dry it by hot pressing at a temperature of 140°C and a pressure of 0.6 MPa for 25 minutes.

[0023] The soaking solution in the above step (1) is made by the following method: add sodium nitrate, α-sulfo fatty acid methyl ester disodium salt, sodium polyacrylate, sodium succinate, and sodium ...

Embodiment 3

[0025] A wood hot pressing drying method, characterized in that it comprises the following steps:

[0026] (1) Soak the wood in the soaking solution for 2 hours, and then dry the wood in a ventilated place. The temperature of the soaking solution is 25°C. The soaking solution is composed of the following components by weight: 7 parts of sodium nitrate, α -8 parts of sulfo fatty acid methyl ester disodium salt, 12 parts of sodium polyacrylate, 5 parts of sodium succinate, 11 parts of sodium citrate, 200 parts of water;

[0027] (2) Steam the wood at 100°C and 100% relative humidity for 3 hours, and then ultrasonically treat the wood for 50 minutes;

[0028] (3) Put the wood in a hot press, and dry it by hot pressing at a temperature of 150°C and a pressure of 0.7 MPa for 30 minutes.

[0029] The soaking solution in the above step (1) is made by the following method: add sodium nitrate, α-sulfo fatty acid methyl ester disodium salt, sodium polyacrylate, sodium succinate, and sodium citr...

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Abstract

The invention discloses a hot press drying method for wood. The method comprises the steps of soaking the wood into a soak solution for 1-2 hours, then putting the wood in a ventilated place and drying in the air; steaming the wood for 2-3 hours under the conditions that the temperature is 100 DEG C and the relative humidity is 100%; after that, carrying out ultrasonic treatment on the wood for 30-50 min; finally, putting the wood into a hot press, and carrying out hot press drying for 20-30min under the conditions that the temperature is 130-150 DEG C and the pressure is 0.5-0.7 MPa. After the method is adopted, the density and the bending strength of the wood are improved, and the dried wood does not generate an internal crack and is lower in moisture-absorption characteristic and good in stability.

Description

Technical field [0001] The invention relates to the field of wood processing, in particular to a wood hot pressing drying method. Background technique [0002] Hot-press drying is to heat the wood in a contact conduction way. Because the heating plate has a high heating temperature, it is in close contact with the dried material, and the heat transfer is large. The interior of the wood can reach high temperature quickly, so that the steam pressure is rapidly increased, which promotes the interior of the wood. Moisture moves to the outside, and some wood with good air permeability can be quickly dried in a few hours or even tens of minutes. Due to the effect of pressure, the thickness of the dried wood will shrink more than its normal shrinkage, which will increase its density and surface hardness. It also improves the performance of the wood and adds value to the wood. In addition, the dimensional stability of the dried wood is good, the surface of the board is smooth and the ra...

Claims

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Application Information

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IPC IPC(8): B27K5/04B27K3/52B27K5/00F26B9/04
CPCB27K5/04B27K3/52B27K5/0065F26B9/04F26B2210/16
Inventor 陈献军陈子玉
Owner FUNAN XINGGUANG ARTS & CRAFTS CO LTD