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Aldehyde collector and manufacturing method of woody panel using it

A manufacturing method and capture agent technology, applied in the direction of manufacturing tools, chemical instruments and methods, aldehyde/ketone condensation polymer adhesives, etc., can solve environmental and health hazards, limit formaldehyde release, formaldehyde cannot be fully captured, etc. problem, to achieve a high capture rate

Inactive Publication Date: 2008-05-07
IPPOSHA OIL INDS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this case, there is a problem that the free formaldehyde generated by the above-mentioned formaldehyde-based adhesive is released from the wooden board into the air, causing harm to the environment and health.
Namely: Since the capture agent is in the shape of a dispersed filter in the wooden board, free formaldehyde cannot be fully captured
Especially in view of the revision of the JIS law in recent years, the amount of formaldehyde released is strictly limited, and in the above method, the formaldehyde capture ability is not enough to make a wooden board evaluated by the F☆☆☆☆ class where the use is not restricted

Method used

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  • Aldehyde collector and manufacturing method of woody panel using it
  • Aldehyde collector and manufacturing method of woody panel using it
  • Aldehyde collector and manufacturing method of woody panel using it

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0153] The production of wooden boards

[0154] The wood chips and other wooden materials are crushed by a flaker, and sieved through a sieve with a sieve size of 1.7mm. The wooden material under the sieve is used as the wooden material for the surface and the inner layer, and the wooden material on the sieve is used as the wooden material for the core layer. The sieved wood material is dried in a hot air dryer at 90°C, and the moisture content reaches below 3%. Then use urea-formaldehyde resin (non-volatile matter 65%, urea: formaldehyde = 1:1.2mol) as a binder, in which the proportions of 20 parts, 1 part, 0.5 parts, 2 parts and 55% wax emulsion, hardened Mix ammonium chloride and water (hereinafter referred to as mixture A).

[0155] With respect to 100 parts of the wood material for the surface layer and the inner layer, spray 25 parts of the above-mentioned mixture A and mix them evenly. Then, 5 parts of sodium bisulfite powder as an aldehyde trapping agent was added, mixed, ...

Embodiment 2～13、 comparative example 1～8

[0161] The type of the aldehyde trapping compound in Example 1 was changed to prepare an aldehyde trapping agent. The wood board was produced in the same manner as in Example 1, and the same evaluation as in Example 1 was performed. In addition, all aldehyde trapping compounds are in powder form. In addition, the addition amount of the aldehyde trapping agent was changed, and the same evaluation was performed. The results are shown in Table 4 (Examples 2 to 13) and Table 5 (Comparative Examples 1 to 8).

[0162] Table 4

[0163] Example 1

Example 2

Example 3

Example 4

Sodium bisulfite

Surface layer and inner layer: 5 copies

Core layer: 5 parts

Potassium Bisulfite

Surface layer and inner layer: 5 copies

Core layer: 5 parts

Sodium metabisulfite

Surface layer and inner layer: 5 copies

Core layer: 5 parts

Potassium metabisulfite

Surface layer and inner layer: 5 copie...

Embodiment 14～23

[0174] The following are the results of the aldehyde trapping agent containing two compounds: a compound that generates sulfur dioxide when heated and a compound that generates alkaline gas when heated, as shown in Table 7 (Examples 14 to 23). In addition, after uniformly mixing the used aldehyde trapping agent in advance, a wooden board was produced by the same method as in Example 1.

[0175] Table 7

[0176] Item

[0177] Item

[0178] Item

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Abstract

The present invention provides an aldehyde capture material to be used in producing plywood by using veneers and a formaldehyde adhesive, which is not lowered in the capturing power even when the resulting plywood is subjected to surface grinding and which exerts a high capturing power for formaldehyde; a process for the production of plywood with the material; and plywood obtained by the process. [MEANS FOR SOLVING PROBLEMS] A powdery aldehyde capture material containing at least one aldehyde-capturing compound which is solid at ordinary temperatures and has the property of generating an acid gas such as sulfurous acid gas on being heated; and a process for production of plywood which comprises incorporating the above aldehyde capture material into an adhesive or veneers and producing plywood through hot pressing by the use of the adhesive and the veneers.

Description

Technical field [0001] The present invention relates to an aldehyde trapping agent for trapping aldehydes such as formaldehyde, and more specifically, to an aldehyde trapping agent for suppressing the generation of aldehydes from a wood board manufactured using a wood material and a formaldehyde binder. Background technique [0002] When manufacturing wood-based panels such as particleboard, plywood, and wood fiberboard, formaldehyde-based adhesives (phenolic resin, urea-formaldehyde resin, melamine resin) and the like are sometimes used as the adhesive. In this case, there is a problem that the free formaldehyde generated by the above-mentioned formaldehyde binder is released from the wood board into the air, which is harmful to the environment and health. [0003] The current method to solve this problem is to apply urea, sulfites, and hydrazides, which are so-called formaldehyde trapping agents that react with formaldehyde to trap it, on the surface of the wood board (see Pate...

Claims

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Application Information

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IPC IPC(8): C09K3/00B27K5/00C09J161/00C09J191/06A62D3/00
Inventor 石本健一白神幸男岛田伸行马渕智之竹内俊哉池田誉司
Owner IPPOSHA OIL INDS
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