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

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0047] Example one

[0048] The preparation method of compressed flame-retardant profile includes the steps:

[0049] A. Lumber: Wood billets are made from fast-growing logs;

[0050] B. Carbonization: stack the wood neatly and press 1t / m on top of the wood pile 2 The standard pressurized steel plate frame is poured into concrete briquettes, and then loaded into the wood carbonization equipment, the temperature is raised and humidified rapidly, the temperature is increased to 80~90℃, the humidity is humidified to 70~80% relative humidity, and then kept for 2~4h. Adopt a stepped heating method to increase the temperature to 125-135℃ at a rate of (10~20℃) / h and keep it for 2h~4h, and then use a stepped heating method to increase the temperature at a rate of (8~15℃) / h To 175~200℃, and keep at the highest temperature for 2~4h. After the end, spray atomized water method to quickly cool the wood until the temperature in the carbonization equipment is less than 120℃, stop heating and spray...

Example Embodiment

[0062] Example two

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

[0064] The ammonium polyphosphate flame retardant of the present invention is a high degree of polymerization crystal type II ammonium polyphosphate (NH 4 PO 3 ) n (N>20), this product is an important branch of phosphorus-containing inorganic...

Example Embodiment

[0066] Example three

[0067] Same as Example 1, the difference is that the step D is on the hot press, the temperature of the hot press pad is controlled to 160°C, the wood obtained after step b is sent to the hot press, and the hot press is quickly closed until just touching For wood, preheat the wood for 80s, then keep it for 2h; 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℃ 2~4h; the step E is shaped for 5-8h.

[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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