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Thickening composition for adhesive for plywood and preparation method of thickening composition

An adhesive and plywood technology, applied in the directions of adhesives, adhesive types, starch adhesives, etc., can solve the problems of consuming large food resources and increasing the cost of raw materials, and achieve the advantages of good adsorption, simple use and lower production costs. Effect

Active Publication Date: 2015-01-28
新沂市超华木业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problem that the current plywood industry uses high-quality flour as the thickening composition of the adhesive, the cost of raw materials is constantly increasing and consumes a large amount of food resources, the present invention provides a thickening composition of the adhesive for plywood and a preparation method thereof. Flour is modified, especially by using the waste lignin in the pulp and paper industry, through the strong reactivity of guaiacyl and p-hydroxyphenyl to the adjacent vacancies, as well as the phenolic hydroxyl and The aldehyde group can participate in the condensation curing reaction of phenol and formaldehyde, improving the initial tack of the adhesive

Method used

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  • Thickening composition for adhesive for plywood and preparation method of thickening composition

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Effect test

Embodiment 1

[0025] The thickening composition of the adhesive for plywood of the present invention is made of the raw materials comprising the following parts by weight:

[0026] 60 kg of flour, 30 kg of lignin, 30 kg of cassava flour, 3 kg of polyvinyl alcohol, 3 kg of silicoaluminide, and 5 kg of antifungal agent.

[0027] Described fungicide is phenol.

[0028] The silicoaluminide is aluminosilicate.

[0029] The preparation method of the thickening composition of adhesive for plywood of the present invention comprises the following steps:

[0030] A. Heat polyvinyl alcohol;

[0031] B. Mix flour, lignin, tapioca flour, and silicoaluminide in proportion to obtain a mixture;

[0032] C. Add an antifungal agent to the mixture in step B, then add polyvinyl alcohol dropwise while stirring, and stir well to obtain.

[0033] The stirring time in the step C is 20 minutes.

Embodiment 2

[0035] The thickening composition of the adhesive for plywood of the present invention is made of the raw materials comprising the following parts by weight:

[0036] 70 kg of flour, 40 kg of lignin, 40 kg of cassava flour, 4 kg of polyvinyl alcohol, 4 kg of silicoaluminide, and 6 kg of antifungal agent.

[0037] Described fungicide is pentachlorophenol.

[0038] The silicoaluminide is aluminosilicate.

[0039] The preparation method of the thickening composition of adhesive for plywood of the present invention comprises the following steps:

[0040] A. Heat polyvinyl alcohol;

[0041] B. Mix flour, lignin, tapioca flour, and silicoaluminide in proportion to obtain a mixture;

[0042] C. Add an antifungal agent to the mixture in step B, then add polyvinyl alcohol dropwise while stirring, and stir well to obtain.

[0043] The stirring time in the described step C is 25 minutes.

Embodiment 3

[0045] The thickening composition of the adhesive for plywood of the present invention is made of the raw materials comprising the following parts by weight:

[0046] 80 kg of flour, 50 kg of lignin, 50 kg of cassava flour, 5 kg of polyvinyl alcohol, 5 kg of silicoaluminide, and 7 kg of antifungal agent.

[0047] The antifungal agent is copper 8-hydroxyquinolate.

[0048] The silicoaluminide is aluminosilicate.

[0049] The preparation method of the thickening composition of adhesive for plywood of the present invention comprises the following steps:

[0050] A. Heat polyvinyl alcohol;

[0051] B. Mix flour, lignin, tapioca flour, and silicoaluminide in proportion to obtain a mixture;

[0052] C. Add an antifungal agent to the mixture in step B, then add polyvinyl alcohol dropwise while stirring, and stir well to obtain.

[0053] The stirring time in the step C is 30 minutes.

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Abstract

The invention discloses a thickening composition for an adhesive for plywood. The composition is prepared from the following raw materials in parts by weight: 60-100 parts of flour, 30-50 parts of lignin, 30-50 parts of tapioca flour, 3-5 parts of polyvinyl alcohol, 3-5 parts of silicon aluminide and 5-10 parts of a mildew preventive. The invention further discloses a preparation method of the thickening composition for the adhesive for plywood. The preparation method comprises the following steps: A, thermally dissolving polyvinyl alcohol; B, mixing the flour, lignin and tapioca flour in proportion to obtain a mixture; and C, adding the mildew preventative into the mixture in the step B, and then dropwise adding polyvinyl alcohol and silicon aluminide while stirring. The tapioca flour is good in viscidity, so that the composition has very strong adsorbability. Lignin and a wood veneer have relatively strong affinity. The flour is more flexible due to polyvinyl alcohol. According to the composition disclosed by the invention, not only is the production cost lowered, but also the adhering property is further enhanced.

Description

technical field [0001] The invention relates to the plywood manufacturing industry, in particular to a thickening composition of an adhesive for plywood and a preparation method thereof. Background technique [0002] Flour is widely used as a thickener in the wood-based panel plywood industry, and flour accounts for about 5-6% of the plywood manufacturing cost. As the price of flour continues to rise, so does the cost of plywood. At present, most of the flour used in plywood is edible flour. The price of flour used for Type I plywood is about 2,800 yuan / ton, and the price of flour used for Type II and Type III plywood is also about 2,400 yuan / ton. The price of good flour is high. If you use flour with a price below 2400 yuan / ton, the flour contains less gluten, thickens without increasing viscosity, and the flour is easy to separate from the glue, which makes the initial viscosity of the glue poor. The board is processed in a cold press. The effect of pre-pressing is poor...

Claims

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Application Information

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IPC IPC(8): C09J103/02C09J197/00C09J129/04
Inventor 林东平谭钢张志伟赵志华郑小颂杨清华秦志东黄德智韦春秀
Owner 新沂市超华木业有限公司
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