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Preparation method of composite modified adhesive and manufacturing method of anti-damp fiberboard

A compound modification and manufacturing method technology, applied in the direction of adhesives, adhesive types, adhesive additives, etc., can solve the problems of complex synthesis process conditions and equipment, difficulty in meeting the high moisture-proof and water-resistant performance requirements of fiberboard, and expensive raw materials. , to achieve the effect of solving unstable waterproof performance and easy mildew, simple manufacturing process and low cost

Inactive Publication Date: 2018-12-28
GUANGXI FENGLIN WOOD IND GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] To meet the performance requirements of the national standard GB / T11718-2009 for indoor ordinary or furniture-type fiberboards Urea-formaldehyde resin (UF) or melamine-modified urea-formaldehyde resin (MUF) is commonly used, but it is difficult to meet environmental protection E 0 High moisture-proof and water-resistant performance requirements of high-grade fiberboard, while the direct use of isocyanate (MDI) or phenolic resin (PF) can meet the moisture-proof MDF requirements, but the raw materials are expensive, the synthesis process conditions and equipment are complex, etc., which limit large-scale production and application

Method used

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  • Preparation method of composite modified adhesive and manufacturing method of anti-damp fiberboard
  • Preparation method of composite modified adhesive and manufacturing method of anti-damp fiberboard
  • Preparation method of composite modified adhesive and manufacturing method of anti-damp fiberboard

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Effect test

Embodiment 1

[0021] A preparation method of a composite modified adhesive, the main points of which are: 70 parts of environmentally friendly urea-formaldehyde resin or melamine-modified urea-formaldehyde resin glue, 5 parts of potassium sorbate, 5 parts of polyol, 5 parts of isocyanate, 15 parts of water, Mix evenly according to the weight ratio; among them, the environmentally friendly urea-formaldehyde resin or melamine-modified urea-formaldehyde resin glue is E 1 Grade or E 0 Grade, density 1.18-1.19g / cm 3 , the viscosity is 16-18S (20℃, T4 cup), the solid content is 52.0-53.0%, the pH value is 7.2-7.5, and the free formaldehyde is ≤0.15%; the polyol is ethylene glycol or glycerol, and the isocyanate is di Phenylmethane diisocyanate or isocyanate gum.

[0022] A method for manufacturing a moisture-proof and water-resistant fiberboard, the key of which is to carry out the following steps:

[0023] After the compound modified adhesive is prepared, follow the production process for pro...

Embodiment 2

[0029] A preparation method of a composite modified adhesive, the main points of which are: 80 parts of environmentally friendly urea-formaldehyde resin or melamine-modified urea-formaldehyde resin glue, 10 parts of potassium sorbate, 2 parts of polyol, 0.5 parts of isocyanate, 7.5 parts of water, Mix evenly according to the weight ratio;

[0030] Among them, the quality of environmentally friendly urea-formaldehyde resin or melamine-modified urea-formaldehyde resin is E 1 Grade or E 0 Grade: Density 1.20-1.21g / cm 3 , the viscosity is 22-25S (20°C, T4 cup), the solid content is 52.0-53.0%, the pH value is 8.2-8.5, and the free formaldehyde is less than or equal to 0.20%. The polyol is a mixture of ethylene glycol and glycerol, and the isocyanate is a mixture of diphenylmethane diisocyanate and isocyanate glue.

[0031] A method for manufacturing a moisture-proof and water-resistant fiberboard, the key of which is to carry out the following steps:

[0032] After the prepara...

Embodiment 3

[0037] A preparation method of a composite modified adhesive, the key points of which are: 75 parts of environmentally friendly urea-formaldehyde resin or melamine-modified urea-formaldehyde resin glue, 7.5 parts of potassium sorbate, 3.5 parts of polyol, 2.5 parts of isocyanate, 11.5 parts of water, Mix evenly by weight.

[0038] Among them, the quality of environmentally friendly urea-formaldehyde resin or melamine-modified urea-formaldehyde resin is E 1 Grade or E 0 Grade: Density 1.20-1.21g / cm 3, the viscosity is 20-22S (20°C, T4 cup), the solid content is 52.0-53.0%, the pH value is 8.0-8.2, and the free formaldehyde is less than or equal to 0.18%. Among them, the polyol is a mixture of three kinds of ethylene glycol, propylene glycol and dipropylene glycol. The isocyanate is obtained by mixing diphenylmethane diisocyanate, isocyanate glue and emulsifiable isocyanate.

[0039] A method for manufacturing a moisture-proof and water-resistant fiberboard, the key of which...

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Abstract

The invention provides a preparation method of a composite modified adhesive and a manufacturing method of an anti-damp fiberboard. The preparation method is characterized in that 70-80 parts of environment-friendly urea resin or melamine modified urea resin adhesive, 5-10 parts of potassium sorbate, 2-5 parts of polyatomic alcohol, 0.5-5 parts of isocyanate and 5-15 parts of water are evenly mixed according to the weight ratio, and the composite modified adhesive is obtained and applied to manufacturing of the anti-damp water-resistant fiberboard. According to the preparation method, the solidifying time of the adhesive during hot press of the fiberboard can be obviously shortened, the production efficiency is improved, the bonding strength and anti-damp performance of the fiberboard areimproved, the composite modified adhesive has the obvious advantages of high mechanical strength, good size stability and waterproof performance and the like, and the problem is solved that the fiberboard easily expands and deforms under the high-humidity environment and is poor in strength.

Description

technical field [0001] The invention relates to the technical field of wood-based panels and adhesives, in particular to a method for preparing a composite modified adhesive and a method for manufacturing moisture-proof fiberboards. Background technique [0002] Fiberboard is one of the main types of wood-based panels. It has unique advantages such as uniform material, dense and delicate structure, smooth and smooth surface, stable performance, no radiation and easy processing. Currently, it is used in furniture manufacturing and building decoration industries. 90% The above, but most of the fiberboards are furniture type or ordinary type MDF used in dry state, which cannot be used in high humidity places such as cabinets, bathroom furniture, storage cabinets, lockers and other high-end furniture. The definition and requirements of the national standard GB18580-2017 and GB / T11718-2009 on fiberboard under humid or high humidity state not only require the formaldehyde emission...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J161/24C09J161/32C09J175/08C09J11/06C09J11/08B27N3/00B27N3/04
CPCB27N3/002B27N3/04C08K2201/014C09J11/06C09J11/08C09J161/24C09J161/32C08L75/04C08K5/098
Inventor 韦淇峰黄精明卢胜高安超唐运表
Owner GUANGXI FENGLIN WOOD IND GRP CO LTD
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