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Compressed flame retardant section bar

A flame-retardant, flame-retardant layer technology, applied in the direction of wood compression, wood impregnation, impregnated wood, etc., can solve the problems of reduced dimensional stability of profiles, and achieve high dimensional stability, low production cost, and high yield. Effect

Inactive Publication Date: 2013-02-13
张新宇 +4
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the substrate layer treated by this method is only mechanically compressed and not cured. It will be affected by temperature and humidity during use, which will reduce the dimensional stability of the profile.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] A method for preparing a compressed flame-retardant profile, comprising the steps of:

[0049] A. Lumber making: Timber blanks are made from fast-growing logs;

[0050] B. Carbonization: Neatly stack the wood and press 1t / m on the top of the wood pile 2 The standard pressurized steel plate frame pours concrete briquettes, and then puts them into wood carbonization equipment, heats up and humidifies rapidly, the temperature rises to 80-90°C, and the humidity is humidified to 70-80% relative humidity, keep for 2-4 hours, and then Use a step-wise heating method to raise the temperature to 125-135°C at a rate of (10-20°C) / h and keep it for 2h-4h, and then use a step-wise heating method to raise the temperature at a rate of (8-15°C) / h to 175-200°C, and keep at the highest temperature for 2-4 hours. After the end, use the method of spraying atomized water to quickly cool down the wood until the temperature in the carbonization equipment is lower than 120°C. Stop heating and ...

Embodiment 2

[0063] Same as Example 1, the difference is that the flame retardant in the step C is an ammonium polyphosphate solution with a concentration of 35-45wt%; the step B is impregnated with a flame retardant whose thermal decomposition temperature is above 200°C at normal temperature and pressure or low pressure 1.5h; Step D is on the hot press, control the temperature of the backing plate of the hot press to 160°C, send the wood obtained after the treatment in step b into the hot press, and quickly close the hot press until it just touches the wood. Preheat for 50-100s, then keep warm for 1-3 hours; then stack the pressed wood, put it on a pallet, send it to a carbonization kiln using superheated steam as the heat treatment medium, and treat it under the condition of 180-210°C for 2 ~4h.

[0064] The ammonium polyphosphate flame retardant of the present invention is high degree of polymerization crystalline type II ammonium polyphosphate (NH 4 PO 3 ) n (n>20), this product is ...

Embodiment 3

[0067] Same as Example 1, the difference is that step D is on the hot press, control the temperature of the backing plate of the hot press to 160°C, send the wood obtained after the treatment in step b into the hot press, and quickly close the hot press until it just touches For wood, preheat the wood for 80s, then keep it warm for 2 hours; then stack the pressed wood, put it on a pallet, and send it to a carbonization kiln using superheated steam as the heat treatment medium, and treat it at 180-210 °C 2-4 hours; 5-8 hours for setting the step E.

[0068]

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Abstract

The invention belongs to the production field of wooden products, and particularly relates to a compressed flame retardant section bar. The flame retardant section bar comprises a flame retardant layer, a compressed compacted layer and a base material layer in sequence, wherein the flame retardant layer, the compressed compacted layer and the base material layer are naturally connected by wood fiber to be a whole. The section bar disclosed by the invention is strong in decay resistance and weather resistance, long in service life and wide in use approach.

Description

technical field [0001] The invention belongs to the field of wood product production, and in particular relates to a compressed flame-retardant profile. Background technique [0002] As a renewable resource, wood is more and more valued by people, but the anisotropy of wood itself makes wood prone to warping, cracking, deformation, perishability, mildew, and short service life during use, especially fast-growing wood. , these wood defects are more serious, thereby limiting the use of wood. Therefore, in order to improve the dimensional stability of wood and prolong the service life of wood, people have carried out many scientific research activities on the improvement of wood function. [0003] In the 1990s, Finland, the Netherlands, France and Germany began to conduct research on carbonized wood (scientific name: heat-treated wood or heat-modified wood). The typical process is to impregnate the wood in high-temperature (160°C-240°C) hot oil. Processing, or using inert gas...

Claims

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Application Information

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IPC IPC(8): B27M3/02B27M1/06B27M1/02B27K3/34B32B21/13
Inventor 计小良
Owner 张新宇
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