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Manufacturing method of surface compressed plate

A production method and surface pressure technology, applied in wood compression, wood treatment, wood humidity control, etc., can solve the problems of unclear process parameters, poor operability, and low production efficiency, and achieve clear and operable process parameters Strong performance and high production efficiency

Inactive Publication Date: 2010-03-10
ZHEJIANG FORESTRY UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But it has the following disadvantages: (1) in a sealed container, the plantation soft wood is processed, the process is complicated, the operation is difficult, and the production efficiency is low; (2) the pressure used for hot pressing is 16.0-30.0MPa, which is not specified Whether it is gauge pressure or unit pressure, the process parameters are not clear, and the operability is not strong; (3) The hot pressing pressure is too high, which greatly reduces the utilization rate of wood; deep

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] First prepare light-colored water-soluble low-molecular-weight phenolic resin glue. The raw materials are phenol, formaldehyde, sodium hydroxide and melamine. The amount of input is 20-40% of the total amount of phenol, and the process is as follows:

[0023] (a) dissolving phenol, when the temperature is 60-65 DEG C, add NaOH, the addition amount accounts for 50-70% of the total NaOH dosage, and react for 20 minutes;

[0024] (b) Adding formaldehyde, the first addition accounted for 70-80% of the total formaldehyde dosage, raised the temperature to 85-95°C, and reacted for 10-30 minutes; lowered the temperature to 60-75°C, added the second batch of formaldehyde, the amount added Accounting for 10-15% of the total dosage of formaldehyde; and adding NaOH, the amount added accounts for 10-20% of the total dosage of NaOH;

[0025] (c) Raise the temperature to 85-95°C, keep it warm for 10-20 minutes, add melamine, the input amount is 20-40% of the total amount of phenol; a...

Embodiment 2

[0034] The preparation process of the light-colored water-soluble low-molecular-weight phenolic resin glue used in this example is the same as in Example 1, and the treatment of the board is also to impregnate one surface of the board. Proceed as follows:

[0035] (1), dry, the plantation forest wood poplar is sawed and processed into a plate with a thickness of 25mm, and dried to a moisture content of 30%;

[0036] (2), roll pressing, the plate after drying is placed between the two pressure rollers of the rolling machine to carry out transverse grain radial rolling, and the thickness compression rate of the plate when passing through the pressure rollers is controlled at 30%;

[0037] (3), surface impregnation, immediately with one side of the surface part of the plate after the rolling process, accounting for 25% of the thickness of the plate, soaked in the light-colored water-soluble low molecular weight phenolic resin glue with a concentration of 25%, the plate is in Abs...

Embodiment 3

[0041] The preparation process of the light-colored water-soluble low-molecular-weight phenolic resin glue used in this example is the same as in Example 1, and the treatment of the board is also to impregnate one surface of the board. Proceed as follows:

[0042](1), drying, sawing and processing plantation timber eucalyptus into a plate with a thickness of 17mm, and drying to a moisture content of 25%;

[0043] (2), roll pressing, the plate after drying is placed between the two pressure rollers of the rolling machine to carry out transverse grain radial rolling, and the thickness compression rate of the plate when passing through the pressure roller is controlled at 20%;

[0044] (3), surface impregnation, immediately with one side of the surface part of the plate after the rolling process, accounting for 20% of the thickness of the plate, soaked in the light-colored water-soluble low molecular weight phenolic resin glue with a concentration of 18%, the plate is in Absorb ...

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Abstract

The invention relates to a manufacturing method of a surface compressed plate, in particular to solving the technical problem of providing a manufacturing method of a surface compressed plate featuring high surface layer density, high strength, low probability of deformation, simple technology, strong operability and lighter color. The technical scheme for solving the problem is as follows: the method comprises the following steps: (1) drying and controlling the water content between 20% and 30%; (2) rolling and controlling the compression ratio between 10% and 30%; (3) impregnating surface layer, namely soaking one or two sides of the plate into light-color water-soluble low molecular weight phenolic resin adhesives at a concentration of 10-25%; (4) softening by steam and controlling thesoftening temperature between 120 DEG C and 140 DEG C and time between 20min and 60min; and (5) compressing surface layer and controlling the compression ratio between 15% and 50%, the hot pressing temperature between 160 DEG C and 180 DEG C and the unit pressure between 1.5MPa and 4.5MPa. The method is suitable for such fields as furniture manufacturing, indoor decoration and the like.

Description

technical field [0001] The invention relates to a method for making a surface compacted plate. It is suitable for furniture manufacturing, interior decoration and other fields. Background technique [0002] At present, my country has entered the stage of developing and applying a large number of plantation fast-growing wood, but the material of plantation wood is loose, low density, and poor in mechanical strength, so it cannot be directly used as materials for furniture and interior decoration. In order to overcome the shortcomings of artificial forest wood, it is usually strengthened by impregnation and compaction methods. Among them, ordinary compressed wood, surface compacted wood (surface compacted wood), and compressed plastic wood made by compaction methods are used. The hardness, density, and strength of plantation wood have been greatly improved, and the use of inferior wood has been realized. In particular, the surface compacted material can concentrate the requi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B27M1/08B27K1/00B27M1/02B27K3/00B27K3/38B27K5/06C08G14/10
Inventor 鲍滨福杜春贵于红卫章卫钢李延军
Owner ZHEJIANG FORESTRY UNIVERSITY
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