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A new method for manufacturing recombined wood

A manufacturing method and technology of recombining wood, which is applied in the field of wood processing, can solve the problems of long time, poor permeability, etc.

Active Publication Date: 2022-01-28
LIANYUNGANG NANFANG WOOD IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most air-drying wood glues are poorly penetrating and require external pressure to achieve the impregnation effect, or take longer to reach the specified amount of impregnation

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Embodiment 1: take the recombined wood manufacturing method of the disentangling poplar wood beam after the blue change as constituent unit, and its steps are as follows:

[0018] Step 1) unit treatment: dilute the poplar wood bundles after the blue change to a mixed solution of 0.1mol / L NaoH and sodium pyrophosphate with a pH value of 9.0, and then adjust the pH value so that the pH value reaches 7.5;

[0019] Step 2) drying: drying the conditioned poplar wood beams to a moisture content of 10%,

[0020] Step 3) dipping and drying: the dried wood bundles are dipped with low molecular weight phenolic resin, the viscosity is 15mpa s, the molecular weight is 350, the dipping time is 1min, and the amount of dipping of wood bundles is the absolute dry weight 30% of 30%, after dipping and drying, the drying temperature is 45°C, and the moisture content after drying is 10-12%;

[0021] Step 4) Plate making: The hot-pressing process adopted is that the hot-pressing temperatur...

Embodiment 2

[0023] Embodiment 2: take the Chinese fir branch material after the blue change as raw material, then through rolling, the wood beam that loosens into is the recombined wood manufacturing method of constitutive unit, and its steps are as follows:

[0024] Step 1) unit treatment: dilute the fir wood beams after the blue change to a mixed solution of 0.1mol / L NaoH and sodium pyrophosphate with a pH value of 10.0 to adjust the pH value so that the pH value reaches 8.5;

[0025] Step 2) drying: drying the conditioned poplar wood bundles to a moisture content of 10%;

[0026] Step 3) dipping and drying: the dried wood bundles are dipped with low molecular weight phenolic resin, the viscosity is 17mpa s, the molecular weight is 300, the dipping time is 3min, and the amount of dipping of wood bundles is the absolute dry weight 35% of 35%, after dipping and drying, the drying temperature is 50°C, and the moisture content after drying is 8-12%;

[0027] Step 4) Plate making: using a s...

Embodiment 3

[0028] Embodiment 3: the recombined wood manufacturing method taking the toon wood beam after the blue change as a constituent unit, its steps are as follows:

[0029] Step 1) unit treatment: the thawed toon wood beams after the blue stain are diluted with deionized water to a mixed solution of 0.1mol / L NaoH and sodium pyrophosphate with a pH value of 11.0, and the pH value is adjusted to make its pH reach 9.0 ;

[0030] Step 2) drying: drying the conditioned poplar wood beams to a moisture content of 12%,

[0031] Step 3) dipping and drying: the dried wood bundles are dipped with low molecular weight phenolic resin, the viscosity is 20mpa s, the molecular weight is 450, the dipping time is 5min, and the dipping amount is the absolute dry weight of the wood bundles 40% of 40%, after dipping and drying, the drying temperature is 55°C, and the moisture content after drying is 8-12%;

[0032] Step 4) Plate making: using a segmented hot-pressing process, the hot-pressing tempera...

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Abstract

The invention discloses a manufacturing method of a novel recombined wood. The process steps are: 1) Use rubber wood, poplar, Chinese fir, Chinese toon and other small-diameter logs that are prone to blue staining, branch wood, and the residues of rotary-cut veneer processing as raw materials, and then roll and decompose them into loose and non-broken longitudinally. The wood beam is a constituent unit; 2) the wood beam is tempered with a mixed solution of 0.1mol / L NaoH and sodium pyrophosphate diluted to a pH value of 9.0-11.0 with deionized water; 3) the wood beam that has been tempered The recombined wood is made through drying, dipping, hot pressing and other processes. The invention has the advantages of high raw material utilization rate, good impregnation effect and the like, and the prepared recombined wood has excellent mechanical properties and better dimensional stability. In addition, it also has the advantages of high production efficiency and low energy consumption.

Description

technical field [0001] The invention relates to a manufacturing method of a novel recombined wood, which belongs to the technical field of wood processing. Background technique [0002] Tree species such as poplar, fir, and rubber wood toon are prone to blue stain, which will lead to a decrease in the appearance quality of the wood, affecting the price of the wood and the appearance of the wood after secondary processing. However, the blue stain has no obvious effect on the strength of the wood, and the wood has the advantages of better permeability and hygroscopicity after the blue stain. Recombined wood is a recombined structural material that is made of wood bundles or veneers, mainly by spraying or dipping glue. The permeability of wood raw materials has a significant impact on the impregnation process and the properties of recombined wood. Most air-drying wood glues are poorly penetrating and require externally applied pressure to achieve impregnation, or take longer ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B27K5/00B27K5/04B27N1/02B27N3/10
CPCB27K5/00B27K5/04B27N1/02B27N3/10
Inventor 关明杰张媛
Owner LIANYUNGANG NANFANG WOOD IND CO LTD
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