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Wood puffing method and prepared puffed wood thereof

A technology for wood and wood drying, which is applied in the field of puffing of wood and puffed wood, and can solve the problems of single puffed wood products.

Active Publication Date: 2018-07-31
INST OF WOOD INDUDTRY CHINESE ACAD OF FORESTRY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to provide a wood expansion method, so as to overcome the problem that the existing wood expansion method can only act on the surface and the resulting expanded wood product is single

Method used

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  • Wood puffing method and prepared puffed wood thereof
  • Wood puffing method and prepared puffed wood thereof
  • Wood puffing method and prepared puffed wood thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] Example 1 Overall uniform puffing of wood

[0057] Processing object: sycamore pine sawn timber with a size of 22cm (width) * 12cm (thickness) * 200cm (length), with a moisture content of 40%.

[0058] Specific steps are as follows:

[0059] (1) Use a drying kiln to adjust the moisture content of the pine sawn timber, wherein the drying section: the dry bulb temperature is 55 °C, the wet bulb temperature is 50 °C, and the balance section: the dry and wet bulb temperature is 35 °C, so that the overall The moisture content is controlled at 45%;

[0060] (2) Use continuous tunnel microwave treatment equipment (Nanjing Sanle Microwave Technology Development Co., Ltd., model WX100L, the same below) to microwave the wood. In order to obtain uniform puffed wood with different puffing degrees, 2 power and 2 The processing parameters are as follows: the microwave frequency is 915MHz, the microwave source power is 100kW and 200kW, and the microwave treatment time is 80s and 120...

Embodiment 2

[0063] Processing object: the size of 22cm (width) * 12cm (thickness) * 200cm (length) pine wood.

[0064] Specific steps:

[0065] (1) If figure 1 I: The core layer of the raw material is sealed with epoxy resin, and the amount of epoxy resin is 150g / m2 2 ;

[0066] (2) The moisture content of the wood is adjusted by kiln drying, wherein the dry bulb temperature of the drying section is 45 °C, the wet bulb temperature is 40 °C, and the dry and wet bulb temperature of the balance section is 35 °C.

[0067] (3) Take out the board and use tunnel microwave equipment to puff the wood. The microwave power is 140kW, the cavity size is 15cm*30cm*50cm, and the speed of the conveyor belt is 1.5m / min. The wood moves with the conveyor belt and passes through the resonant cavity to complete the wood. Puffing treatment to obtain puffed wood.

Embodiment 3

[0069] Processing object: pine wood with a size of 22cm (width)*12cm (thickness)*200cm (length), and the wood moisture content is 10%.

[0070] Specific steps:

[0071] (1) Use epoxy resin to completely seal the core of the cross-section of pine wood, and the amount of resin is 150g / m 2 , and then soak the sealed wood in water at room temperature for 24 hours, adjust the moisture content of the wood surface to about 50%, and the core layer moisture content to be less than 20%;

[0072] (3) Take out the board and use tunnel microwave equipment to puff the wood. The microwave power is 140kW, the cavity size is 15cm*30cm*50cm, and the speed of the conveyor belt is 1m / min. The wood moves with the conveyor belt and passes through the resonant cavity to complete the puffing of the wood. processing to obtain puffed wood.

[0073] The end faces of the puffed wood were observed and measured by the naked eye and soft X-ray, and it was found that the upper and lower surfaces of the wood ...

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Abstract

The invention discloses a wood puffing method and prepared puffed wood by the wood puffing method. The puffing method comprises the steps that the overall water containing rate of the wood is adjustedadopting a kiln drying method and / or a soaking treatment method, and the overall water containing rate of the wood is adjusted to be 30-50%; sealing treatment is performed on the specific fracture surface or side surface position adopting hydrophobic materials, then the layered water containing rate of the wood is adjusted adopting the kiln drying method and / or the soaking treatment, the water containing rate of the wood layer which does not need to be puffed is adjusted to be 20% or below, and the water containing rate of the wood layer which needs to be puffed is adjusted to be 30-50%; andfinally microwave irradiation treatment is performed on the wood, and the puffed wood is obtained. By means of the wood puffing method, the differential distribution of the water containing rate inside the wood can be realized, the puffing effect of the wood is made to be diversified and is flexible and controllable, and the puffed wood of different puffing position distribution can be obtained; and meanwhile, no chemicals are used in the process of wood treatment, and the obtained puffed wood is environment-friendly and is convenient for secondary processing and utilizing.

Description

technical field [0001] The invention belongs to the field of wood processing, and particularly relates to a wood puffing method and puffed wood. Background technique [0002] At present, there are three important ways to make wood with high added value and efficient utilization: (1) functional improvement of wood surface, mainly by bleaching and dyeing wood, changing the color and texture of wood, and improving the surface aesthetic effect of wood. Low-value wood becomes high-quality wood; (2) The physical and chemical properties of wood are improved, and the internal physical and chemical functional improvement of wood is carried out to extend its service life, and to endow wood with functions such as flame retardant, durability and antibacterial properties; (3) Wood chemical group Processing and utilization, for wood gasification, wood liquefaction, wood plasticization, etc., to develop woody feed, lignin carbon fiber, biodegradable wood liquefaction foam that partially re...

Claims

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Application Information

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IPC IPC(8): B27K5/00
CPCB27K5/0055
Inventor 傅峰林兰英周永东李善明王东徐恩光熊令明
Owner INST OF WOOD INDUDTRY CHINESE ACAD OF FORESTRY
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