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Biomass aldehyde-free adhesive for plywood

A technology of plywood and biomass, applied in the direction of starch-derived adhesives, unsaturated alcohol copolymer adhesives, adhesive types, etc., can solve the problems of unstable storage, environmental temperature sensitivity, and large viscosity changes. Achieve the effect of simple process, easy source and good water resistance

Inactive Publication Date: 2013-10-23
吴祖顺 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

No matter how the manufacturer advertises that the residual amount of formaldehyde in urine-formaldehyde glue and phenol-formaldehyde glue can be reduced to within 1‰ of the national standard by means of capture and chelation, the fundamental problem is that formaldehyde is still used in the produced glue. The truth, let it be said, still has aldehydes! Aldehyde is toxic, but the degree of toxicity is different
However, its storage is unstable, its viscosity changes greatly, and it is sensitive to ambient temperature. It is easy to mold, rot, deteriorate, and stink at high temperature; and its bonding strength is low, its water resistance is poor, and its defects are also very obvious.

Method used

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  • Biomass aldehyde-free adhesive for plywood
  • Biomass aldehyde-free adhesive for plywood
  • Biomass aldehyde-free adhesive for plywood

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Embodiment one, comprising the proportioning composition of the following components by weight:

[0022]

[0023] The weight of one portion can be set as required, which can be one kilogram, two kilograms, one gram, two grams, three grams, etc., and can be configured according to the amount required.

[0024] The manufacturing process of this kind of biomass formaldehyde-free plywood adhesive comprises the following process steps:

[0025] 1. Add 670 parts of deionized water to the reactor; then add polyvinyl alcohol; heat up to 90 degrees to fully dissolve the polyvinyl alcohol; wait until the polyvinyl alcohol is fully dissolved, then lower the temperature;

[0026] 2. When the temperature is lowered to 60 degrees, put in a dispersion composed of 50 parts of deionized water and oxidized starch; add liquid caustic soda to adjust the pH value to 7.5-8, then raise the temperature to 90 degrees, keep it warm for 30-40 minutes, and carry out gelatinization reaction ; ...

Embodiment 2

[0029] Embodiment two, comprising the proportioning composition of following component parts by weight:

[0030] The weight of one portion can be set as required, which can be one kilogram, two kilograms, one gram, two grams, three grams, etc., and can be configured according to the amount required.

[0031]

[0032] Also includes Enhancer 100 parts. It can improve the bonding strength of the adhesive.

[0033] It also includes 1.5 parts of antiseptic and antifungal agent. It can effectively prevent the adhesive from mildew and corruption.

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Abstract

The invention discloses a biomass aldehyde-free adhesive for plywood. The biomass aldehyde-free adhesive is characterized by being prepared from the following ingredients in parts by weight: 770 parts of deionized water, 110 parts of polyvinyl alcohol, 45-55 parts of oxidized starch, 4.5-6 parts of liquid alkali, 25 parts of kaolin, 45 parts of calcium carbonate, 0.15 part of sodium tripolyphosphate and 6-8 parts of glycol. The biomass aldehyde-free adhesive for plywood, disclosed by the invention, is absolutely free of the toxic properties of urea-aldehyde adhesives and phenol-aldehyde adhesives and is high in adhesive strength and good in water resistance; and compared with the prior art, the biomass aldehyde-free adhesive has the advantages that the biomass aldehyde-free adhesive is non-toxic, harmless, green and environmental-friendly, the price is slightly higher than that of the urea-aldehyde adhesives and is lower than that of the phenol-aldehyde adhesives, the low-price and fine-quality performance is good, the market demand is extremely high, and the formula is simple and complete. According to the biomass aldehyde-free adhesive disclosed by the invention, the production raw materials are easily obtained, the process is simple, and the operation is convenient, so that the biomass aldehyde-free adhesive is applicable to industrial large-scale production.

Description

technical field [0001] The invention relates to a biomass formaldehyde-free plywood adhesive, and also relates to a manufacturing process of the adhesive. Background technique [0002] With the progress of society and the improvement of people's living standards, there are more and more demands for the use of boards, wood, and bamboo in various office appliances, furniture, decoration, construction, etc. The most widely used plywood is plywood, whether it is three-layer , five, seven, nine or even countless layers, as long as the user requires it, the manufacturer can produce it. Naturally, the production of plywood is inseparable from plywood glue. In order to reduce costs and increase competitiveness, most plywood manufacturers use urea-formaldehyde glue, even if they want to improve the grade, they only use phenolic glue. Both urine-formaldehyde glue and phenol-formaldehyde glue contain the harmful substance formaldehyde, which is a carcinogen and is extremely harmful t...

Claims

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Application Information

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IPC IPC(8): C09J129/04C09J103/10
Inventor 吴祖顺
Owner 吴祖顺
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