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Production method of flame-retardant modified wood

A production method and wood technology, applied in wood treatment, wood impregnation, wood impregnation and other directions, can solve the problems of poor mechanical properties of wood, insignificant fire retardant effect of wood, complicated modification treatment process, etc., and achieve excellent flame retardant properties. The effect of improving the physical and mechanical properties and simplifying the process

Inactive Publication Date: 2015-07-08
广西宾阳县荣良农业科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The above-mentioned wood modification treatment process is complicated, the treatment time is long, the mechanical properties of the modified wood are not very good, the strength is low, the dimensional stability of the wood is poor, and the flame retardant is easy to lose, resulting in the treated wood. The flame retardant effect is not obvious , low corrosion resistance

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Preparation of flame retardant (by weight): 1. Mix 25 parts of diammonium hydrogen phosphate, 10 parts of pentaerythritol, 8 parts of zinc borate and 50 parts of water, and stir to obtain final product; 2. Prepare modified urea-formaldehyde Resin solution (by weight): 150 parts of formaldehyde, 62 parts of urea, 8 parts of thiourea and 350 parts of water are mixed together, stirred evenly, to obtain final product; 3. Add 21 parts by weight of flame retardant to modified urea-formaldehyde resin After dissolving completely in 70 parts by weight of the liquid, the impregnating liquid is obtained; four, the impregnating treatment of poplar wood: the wood is put into a vacuum pressurized tank, and first vacuumed so that the relative vacuum degree in the vacuum pressurized tank reaches-0.085MPa, Keep the vacuum pump off after 30 minutes, and import the wood impregnating solution obtained in step 1 at the same time until the relative vacuum in the vacuum pressurized tank is 1.3...

Embodiment 2

[0022] The only difference between this embodiment and Example 1 is: the parts by weight of each component of the flame retardant are as follows: 20 parts of diammonium hydrogen phosphate, 15 parts of pentaerythritol, 10 parts of zinc borate and 70 parts of water, other steps and parameters and implementation Example 1 is exactly the same.

[0023] The flame-retardant modified poplar prepared in this example has a final weight gain of 25% and a dimensional stability of 20%. Its oxygen index was tested according to GB / T2406-93, and it was measured according to the wood hardness test method of GB 1941-1991 Hardness, measured water absorption according to GB 12626.8-1990, it can be seen that the prepared flame-retardant modified poplar oxygen index increased by 35%, surface hardness increased by 80%, and water absorption decreased by 65%.

Embodiment 3

[0025] The only difference between this embodiment and Example 1 is: the parts by weight of each component of the flame retardant are as follows: 35 parts of diammonium hydrogen phosphate, 20 parts of pentaerythritol, 15 parts of zinc borate and 85 parts of water, other steps and parameters and implementation Example 1 is exactly the same.

[0026] The flame-retardant modified poplar prepared in this example has a final weight gain rate of 40% and a dimensional stability of 40%. The oxygen index was tested according to GB / T2406-93, and the hardness was measured according to the wood hardness test method GB 1941-1991 , according to GB 12626.8-1990 to measure the water absorption, it can be known that the oxygen index of the prepared flame-retardant modified poplar has increased by 60%, the surface hardness has increased by 87%, and the water absorption has decreased by 75%.

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Abstract

The invention discloses a production method of flame-retardant modified wood. The method comprises the following steps: 1, firstly, preparing a flame retardant and then adding the flame retardant into modified urea resin liquid to ensure that a mixture is completely dissolved to prepare wood impregnation liquid; 2, performing waiting treatment by using the wood impregnation liquid obtained in the step 1 by means of vacuum pressurization; and 3, drying to obtain the modified wood. The production process is simple, and the treating liquid can be recycled, so that the size stability of the wood subjected to the treatment is obviously improved, the physical and mechanical property can be obviously improved, the weight grain rate of the wood is 20-43 percent, the oxygen index can be improved by 30-70 percent, and the flame retardant performance of the wood can be kept for a long time.

Description

technical field [0001] The invention relates to a modification method of wood, in particular to a production method of flame-retardant modified wood. Background technique [0002] With the development of my country's social economy, the demand for wood in construction engineering, interior decoration, furniture manufacturing, packaging and other industries is increasing day by day. At present, the utilization of wood materials in construction and interior decoration exceeds 80 million cubic meters per year. Especially in recent years, the Chinese government has begun to introduce advanced manufacturing technology and equipment for wood structure buildings from developed countries such as Europe, America, and Japan, which has promoted the development of wood structure buildings in my country more rapidly. The consumption of wood materials is increasing at an alarming rate. The resources available for use are decreasing year by year. Among the wood resources, some species of w...

Claims

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Application Information

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IPC IPC(8): B27K3/08B27K3/52B27K5/04
CPCB27K3/08B27K3/025B27K3/52B27K5/04B27K2240/00B27K2240/30
Inventor 谢刚周帆周子茜李珠肖
Owner 广西宾阳县荣良农业科技有限公司
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