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Water glue powder for wood industry, and production method for water glue powder

A production method, water-based glue technology, applied in the direction of starch-derived adhesives, starch adhesives, monocarboxylate copolymer adhesives, etc., can solve the problem of high release of free formaldehyde, difficulty in meeting environmental protection standards for boards, and working environment It can achieve obvious advantages, improve workers' enthusiasm for work, and facilitate transportation

Inactive Publication Date: 2015-11-18
HUAIAN ZHENNONG HIGH POLYMER MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The glue used by almost all plywood manufacturers in China is liquid glue purchased from local glue manufacturers. The price is high, the transportation is troublesome, the shelf life is short, and the use is complicated. Fillers need to be added to adjust during use, and the release of free formaldehyde is very high, which is quite low. Environmental protection makes the working environment harsh and it is difficult for the board to meet environmental protection standards

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] A kind of water-based glue powder for wood industry, obtained by the following component distribution ratio in parts by weight: 8 parts of polyvinyl acetate, 20 parts of corn starch, 0.01 part of antioxidant, 5 parts of stearic acid, 5 parts of melamine, and 10 parts of polyvinyl alcohol , 15 parts of oxidized starch, 0.5 parts of borax, and 7 parts of attapulgite.

[0020] Its production steps are:

[0021] (1) Heat polyvinyl acetate and corn starch to 110-120 degrees, knead for 20-40 minutes, and cool down to below 100 degrees;

[0022] (2) Add stearic acid and knead for 5-10 minutes, then add antioxidant and knead for 5 minutes, discharge and cool, and crush to more than 100 mesh.

[0023] (3) Add melamine, polyvinyl alcohol, oxidized starch, borax, attapulgite, and stir evenly with a mixer.

Embodiment 2

[0025] The present invention is obtained by the following component proportions by weight: 15 parts of polyvinyl acetate, 25 parts of tapioca starch, 0.05 parts of antioxidant, 2 parts of stearic acid, 5 parts of melamine, 10 parts of polyvinyl alcohol, 25 parts of oxidized starch, 0.5 parts of borax, 10 parts of attapulgite.

[0026] Its production steps are as in Example 1.

Embodiment 3

[0028] Obtained by the following component distribution ratio in parts by weight: 20 parts of polyvinyl acetate, 30 parts of tapioca starch, 0.03 parts of antioxidant, 5 parts of stearic acid, 5 parts of melamine, 10 parts of polyvinyl alcohol, 20 parts of oxidized starch, 0.5 parts of borax 7 parts, attapulgite clay.

[0029] Its production steps are as in Example 1.

[0030] Its production steps are as in Example 1.

[0031] filler Cost (yuan\ton) Bonding strength MPa Boil the glue time h traditional glue and flour 3046 0.83-1.17 3 Example 1 1920 0.87-1.21 3.2 Example 2 1810 0.85-1.22 3.1 Example 3 2190 0.91-1.34 3.3

[0032] It can be seen from the above table data that the bonding strength and water resistance of the plywood made by the present invention are stronger than those of the traditional water glue blended with flour filler, but the cost is significantly reduced and can be used as a complete substitute.

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PUM

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Abstract

The invention discloses a water glue powder for the wood industry, and a production method for the water glue powder. The water glue powder can completely replace glue and a filling material which are used in a plywood production process. The water glue powder is a solid powder, and can be directly used after being uniformly mixed with water of which the weight is twice of that of the water glue powder, without adding other filling materials; the water glue powder is low in manufacturing cost, environment-friendly, long in shelf life and easy to transport, and is prepared from the following components in parts by weight: 8-20 parts of polyvinyl acetate, 20-30 parts of starch, 0.01-0.05 part of an antioxidant, 2-5 parts of stearic acid, 5 parts of melamine, 10 parts of polyvinyl alcohol, 15-25 parts of oxidized starch, 0.5 part of borax and 7-15 parts of attapulgite.

Description

technical field [0001] The invention relates to the field of board processing glues, in particular to a wood industry water-glue powder and a production method thereof. Background technique [0002] At present, in the production process of plywood, urea-formaldehyde glue or phenolic glue needs to be added with 10-40% industrial flour as a filler, and after mixing, it is applied to the veneer and then pre-pressed and hot-pressed. The glue used by almost all plywood manufacturers in China is liquid glue purchased from local glue manufacturers. The price is high, the transportation is troublesome, the shelf life is short, and the use is complicated. Fillers need to be added to adjust during use, and the release of free formaldehyde is very high, which is quite low. Environmental protection makes the working environment harsh, and it is difficult for the board to meet the environmental protection standards. Contents of the invention [0003] The technical problem to be solved...

Claims

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Application Information

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IPC IPC(8): C09J103/02C09J103/10C09J129/04C09J131/04C09J11/04
Inventor 周琼
Owner HUAIAN ZHENNONG HIGH POLYMER MATERIALS CO LTD
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