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A kind of puffing method of wood and puffed wood prepared therefrom

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: 2019-11-15
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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  • A kind of puffing method of wood and puffed wood prepared therefrom
  • A kind of puffing method of wood and puffed wood prepared therefrom
  • A kind of puffing method of wood and puffed wood prepared therefrom

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] Example 1 Whole wood is uniformly expanded

[0057] Processing object: the sawn timber of Pinus sylvestris pine 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 sylvestris pine sawn timber. Among them, 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 whole sawn timber of the sylvestris pine The moisture content is controlled at 45%;

[0060] (2) Continuous tunnel microwave processing equipment (Nanjing Sanle Microwave Technology Development Co., Ltd., model WX100L, the same below) is used for microwave processing of wood. In order to obtain uniform puffed wood with different puffing degrees, 2 powers and 2 treatment time, the treatment process parameters are: microwave frequency 915MHz, microwave sourc...

Embodiment 2

[0063] Processing objects: sylvestris pine with a size of 22cm (width)*12cm (thickness)*200cm (length).

[0064] Specific steps:

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

[0066] (2) The moisture content of the wood is adjusted by kiln drying. 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-type microwave equipment for wood puffing. The microwave power is 140kW, the cavity size is 15cm*30cm*50cm, and the conveyor belt speed is 1.5m / min. The wood moves with the conveyor belt and passes through the resonant cavity. Expansion treatment to obtain expanded wood.

Embodiment 3

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

[0070] Specific steps:

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

[0072] (3) Take out the board and use tunnel-type microwave equipment for wood puffing. The microwave power is 140kW, the cavity size is 15cm*30cm*50cm, and the conveyor belt speed is 1m / min. The wood moves with the conveyor belt and the wood puffing is completed after passing through the resonant cavity. Processing to obtain expanded wood.

[0073] By observing and measuring the end face of the expanded wood with the naked eye and soft X-ray, it was found that the upper and lower surfaces...

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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 in particular 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 use: (1) Improve the function of wood surface, mainly to bleach and dye wood, change the color and texture of wood, improve the surface aesthetic effect of wood, and Change low-value wood into high-quality wood; (2) Improve the physical and chemical properties of wood, improve the internal physical and chemical functions of wood, prolong its service life, and endow wood with functions such as flame retardancy, durability, and antibacterial properties; (3) Wood chemical composition Separate processing and utilization, for wood gasification, wood liquefaction, wood plasticization, etc., develop woody feed, lignin carbon fiber, biodegradable wood liquefaction foam material that partially replaces petroleum products...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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