Wood fire-retardant treating technology

A technology of flame retardant treatment and treatment process, which is applied in the field of wood flame retardant treatment technology, can solve the problems of poor flame retardant performance, shallow immersion of flame retardant liquid, long processing time, etc., and achieves good flame retardant performance and small product deformation. , the effect of short processing time

Inactive Publication Date: 2006-12-06
SHAANXI UNIV OF TECH
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the shallow immersion of the flame-retardant wood flame-retardant liquid treated with this technology, the flame-retardant performance is poor, and the product is made after processing, and the flame-retardant performance of the product is even worse.
Furthermore, due to the high wood pulp content of the wood, it is not easy to dry, the processing time is long, and the mechanical properties of the wood will change during the processing

Method used

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Experimental program
Comparison scheme
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Embodiment Construction

[0011] The present invention will be further described in detail below in conjunction with embodiments.

[0012] First prepare two flame retardant liquids separately.

[0013] The preparation of the primary flame retardant liquid: dicyandiamide, urea and formaldehyde (mass fraction of 36%) are mixed at 1.5:1.5:1, and the mixture is used to prepare a 20-25% flame retardant liquid, and the pH is adjusted to 10- with NaOH 12.

[0014] The preparation of the secondary flame-retardant liquid: 5% to 15% of ammonium dihydrogen phosphate is added to 0.5-1% of benzalkonium bromide (5% of promethazine)

[0015] Then select the beech wood veneer (thickness 1mm), soak it in the primary flame-retardant solution, ultrasonically treat it for 1-1.5 hours at a frequency of 50-100hz, take out the wood, and bake it for 6 hours; then soak it in the secondary flame-retardant In the liquid, ultrasonic treatment is carried out for 1.5-2 hours at a frequency of 50-100hz. The wood is taken out and baked f...

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Abstract

A wood treating process for the fire retarding purpose includes such steps as choosing wood material, preparing fire-retarding liquid, immersing wood in the fire-retarding liquid which utrasonic treating for 1-1.5 hr, baking, immersing again while ultrasonic treating for 1.5-2 hr, and baking. Its advantages are high fire-retarding effect, less deformation, short time and low cost.

Description

Technical field [0001] The invention relates to a wood processing technology, in particular to a fire-retardant processing technology of wood. Background technique [0002] At present, the production process of flame-retardant wood is basically immersing the selected wood in a flame-retardant solution, soaking for about 70 hours and then drying to obtain flame-retardant wood. This method is simple in process. However, due to the shallow immersion of the fire-retardant wood fire-retardant liquid treated with this technology, the fire-retardant performance is poor, and the product is made into a product after processing, and the fire-retardant performance of the product is worse. Because of the high content of wood pulp, it is not easy to dry, the processing time is long, and the mechanical properties of the wood will change during the processing. Although the process of the above method is simple, the production cost is not low. Summary of the invention [0003] The purpose of th...

Claims

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Application Information

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Patent Type & AuthorityPatents(China)
IPC IPC(8): B27K3/02B27K5/04
Inventor闵锁田李志洲杨海涛任柏林
OwnerSHAANXI UNIV OF TECH