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Axial vacuum fire retarding treatment method for wood

A technology of vacuum treatment and flame retardant treatment, which is applied in wood treatment, wood treatment details, wood processing equipment, etc., can solve problems such as complex processes, and achieve the effect of simple process, high use efficiency and low consumption

Inactive Publication Date: 2016-07-20
BEIJING FORESTRY UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this process requires the wood to be made into wood chips, which are then glued after heat treatment and flame retardant treatment, which is a complicated process

Method used

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  • Axial vacuum fire retarding treatment method for wood
  • Axial vacuum fire retarding treatment method for wood
  • Axial vacuum fire retarding treatment method for wood

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] 1) Place the linden string cutting board with the specification of 200mm(L)×100mm(R)×30mm(T) in such as figure 1 In the processing device shown, the upper and lower ends of the wood are respectively aligned with the sealing rings of the upper and lower liquid collection chambers for sealing treatment;

[0029] 2) Start the pumping system to evacuate the treatment device to form a negative pressure in the device, and perform pre-vacuum treatment under negative pressure. The vacuum degree of this treatment is -0.09MPa and keep for 45 minutes;

[0030] 3) Open the liquid inlet valve, and under the action of negative pressure, the BL-environmentally friendly flame retardant liquid with a concentration of 30% is introduced into the wood along the axial channel such as the pipe (or tracheid) of the wood, so that the inside of the wood is filled with flame retardant Part of the flame retardant liquid enters the upper liquid collection tank upwards, and enters the waste liquid ...

Embodiment 2

[0034] 1) Place the 200mm(L)×100mm(R)×30mm(T) fir string cutting board on such as figure 1 In the processing device shown, the upper and lower ends of the wood are respectively aligned with the sealing rings of the upper and lower liquid collection chambers for sealing treatment;

[0035] 2) Start the pumping system to evacuate the treatment device to form a negative pressure in the device, and perform pre-vacuum treatment under negative pressure. The vacuum degree of this treatment is -0.09MPa and keep for 45 minutes;

[0036] 3) Open the liquid inlet valve, and under the action of negative pressure, the BL-environmentally friendly flame retardant liquid with a concentration of 30% is introduced into the wood along the axial channel such as the pipe (or tracheid) of the wood, so that the inside of the wood is filled with flame retardant Part of the flame retardant liquid enters the upper liquid collection tank upwards, and enters the waste liquid collection chamber along the ...

experiment example 1

[0059] Experimental example 1 drug loading and oxygen index

[0060] 1. Drug loading

[0061] Weigh the wood before entering the treatment device and after the flame-retardant treatment, and the drug loading y (unit: kg / m 3 ) calculation formula is:

[0062] Y=(m 1 -m 0 )×C / V

[0063] In the formula: m 0—— The mass of the Tilia test piece before entering the treatment device, in g;

[0064] m 1—— The wet mass of the specimen after flame retardant treatment, in g;

[0065] C —— The concentration of the flame retardant solution;

[0066] V —— The volume of the specimen, in m 3 .

[0067] See Table 1 for the drug loading results of Example 1, Example 2, and Comparative Examples 1-6.

[0068] 2. Oxygen Index

[0069] According to GBT2406.2-2009 "Determination of Combustion Behavior by Oxygen Index Method for Plastics", the oxygen index of the surface and core wood of the examples and comparative examples were respectively detected by the top surface ignition method. ...

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Abstract

The invention discloses an axial vacuum fire retarding treatment method for wood. The axial vacuum fire retarding treatment method for the wood includes the steps that the wood is placed in a vacuum treatment device in a sealed manner, and axial vacuum impregnation treatment is conducted on the wood so as to enable fire retarding liquid to be guided into different positions in the wood along axial channels, such as vessels or tracheids of the wood, and internal fire retarding treatment of the wood is achieved; the impregnated wood is soaked in an ultrasonic treatment pool containing the fire retarding liquid to be subjected to ultrasonic treatment, and the surface layer of the wood is dipped with the fire retarding liquid; and drying treatment is conducted on the fire retarding wood. By the adoption of the axial vacuum fire retarding treatment method for the wood, wood treatment operation is convenient, the speed is high, the process is simple, and energy consumption is low; the consumption of a fire retardant is low, use efficiency is high, and cyclic utilization can be achieved; and the chemical loading capacity of the manufactured fire retarding wood reaches 60 kg / m<3> to 100 kg / m<3>, the fire retardant is evenly distributed in the wood and the surface layer of the wood, and the fire retarding effect is good.

Description

technical field [0001] The invention relates to a wood flame-retardant treatment technology, in particular to a wood axial vacuum flame-retardant treatment method. Background technique [0002] Wood is a renewable green building material widely used in furniture, construction, interior decoration, packaging and other fields. However, due to the flammability of wood, fires caused by wood materials occur frequently, seriously threatening personal and property safety. According to the requirements of the national mandatory standard GB20286-2006, flame-retardant products and components used in public places must reach a certain level of flame-retardant, and wood without flame-retardant treatment is difficult to meet the standard use requirements, so wood flame-retardant treatment is required. [0003] At present, there are three main types of flame-retardant impregnation treatments for wood: atmospheric pressure impregnation, vacuum impregnation and vacuum pressure impregnation...

Claims

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Application Information

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IPC IPC(8): B27K3/08B27K5/00B27K5/04
Inventor 张扬于志明罗丽丝唐睿琳
Owner BEIJING FORESTRY UNIVERSITY
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