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Surface decorated wood-based panel with paper impregnated thermosetting resin and preparation method thereof

A technology of impregnating film paper and wood-based panels, applied to paper, papermaking, adhesives, etc., to achieve the effect of small molecular weight, moderate viscosity, and solve the problem of paper damage

Active Publication Date: 2020-08-14
INST OF WOOD INDUDTRY CHINESE ACAD OF FORESTRY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, its viscosity is generally higher and its molecular weight is larger, and the above-mentioned problems as a paper impregnating adhesive are more serious

Method used

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  • Surface decorated wood-based panel with paper impregnated thermosetting resin and preparation method thereof
  • Surface decorated wood-based panel with paper impregnated thermosetting resin and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] 1) Polyethylene glycol (molecular weight 200) and isophorone diisocyanate are added in the reactor with stirring and reflux device according to mol ratio 0.8, under the protection of high-purity nitrogen, carry out prepolymerization reaction, the reaction temperature The temperature is 40 °C, the reaction time is 1 h, and the polyurethane prepolymer is obtained.

[0031] 2) The prepolymer was heated to 65°C, and 1,4-butanediol was added dropwise to the prepolymer for 20 min, the chain extension reaction time was 1.5 h, and the stirring speed was 50 r / min. Then, the temperature was lowered to 40°C, and the hydrophilic agent was added, and the addition was completed within 30 minutes. The reaction time of this step was 0.5h.

[0032] 3) Cool to room temperature, add glacial acetic acid for neutralization, and use appropriate amount of acetone to reduce viscosity at the same time, add water and shear at high speed after the viscosity is appropriate, the shear rate is 2000r...

Embodiment 2

[0041] 1) Polyester diol CMA-1024 and isophorone diisocyanate are added to the reactor with stirring and reflux device according to mol ratio 2, under the protection of high-purity nitrogen, carry out prepolymerization reaction, reaction temperature The temperature is 60°C and the reaction time is 0.5h to obtain the polyurethane prepolymer.

[0042] 2) The prepolymer was heated to 80°C, and ethylene glycol was added dropwise to the prepolymer for 10 min, the chain extension reaction time was 0.5 h, and the stirring speed was 100 r / min. Then, the temperature was lowered to 60° C., and the hydrophilic agent was added, and the addition was completed within 30 min. The reaction time of this step was 1.5 h.

[0043] 3) Cool to room temperature, add glacial acetic acid for neutralization, and use appropriate amount of acetone to reduce viscosity at the same time, add water and shear at high speed after the viscosity is appropriate, the shear rate is 4000r / min, and the water-based po...

Embodiment 3

[0052] 1) Polyester glycol CMA-1024, polyethylene glycol (the two mol ratio 1: 1) and hexamethylene diisocyanate are added in the reactor with stirring and reflux device according to mol ratio 1.3, in Under the protection of high-purity nitrogen, a prepolymerization reaction was carried out, the reaction temperature was 50 °C, and the reaction time was 0.7 h to obtain a polyurethane prepolymer.

[0053] 2) The prepolymer was heated to 75°C, propylene glycol was added dropwise to the prepolymer, the dropwise addition time was 15 min, the chain extension reaction time was 0.8 h, and the stirring speed was 80 r / min. Then, the temperature was lowered to 50° C., and the hydrophilic agent was added, and the addition was completed within 30 min. The reaction time of this step was 1 h.

[0054] 3) Cool to room temperature, add glacial acetic acid for neutralization, and use appropriate amount of acetone to reduce viscosity at the same time, add water and shear at high speed after the ...

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Abstract

The invention discloses a surface decorated wood-based panel with paper impregnated thermosetting resin and preparation method thereof. The method comprises the following steps that paper is completely impregnated in an formaldehyde-free impregnating adhesive for 20-40 seconds and dried at 75-105 DEG C until no excessive glue solution exists on the paper surface; after drying, the paper is completely impregnated in the adhesive for 10-30 seconds and completely dried at 85-105 DEG C; a formaldehyde-free wood-based panel is selected, and the paper impregnated thermosetting resin is subjected tohot pressing on the wood-based panel for 1-3 minutes at the pressure of 4-6 Mpa and the temperature of 150-210 DEG C to obtain the product; and the formaldehyde-free impregnating adhesive comprises 30-50 parts of waterborne polyurethane emulsion, 1-5 parts of nano cellulose, 5-10 parts of a filler and 200-300 parts of water. According to the wood-based panel prepared through the method, no free formaldehyde releases, and the no-formaldehyde effect is truly realized.

Description

technical field [0001] The invention relates to an impregnated decorative paper-faced formaldehyde-free artificial board and a preparation method thereof, belonging to the technical field of artificial board processing. Background technique [0002] Restricted by the shortage of wood resources, coupled with the rise of custom home furnishing, the application of impregnated adhesive film paper veneer wood-based panels is becoming more and more extensive. It uses particleboard, fiberboard and other wood-based panels as the base material and impregnated paper as the decorative board for the decorative material. It has many product specifications, good processing performance, and diversified surface decoration. And the surface is smooth, clean and easy to clean and other excellent properties. [0003] Impregnated film paper veneer wood-based panel is to impregnate the decorative paper with the adhesive, and then hot-press and paste it on the surface of the wood-based panel afte...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B27D1/00D21H23/22D21H25/06C09J175/04C09J11/04C09J11/08
CPCB27D1/00C08K2003/2241C09J11/04C09J11/08C09J175/04D21H23/22D21H25/06C08L1/02C08K3/22
Inventor 龙玲徐建峰刘如
Owner INST OF WOOD INDUDTRY CHINESE ACAD OF FORESTRY
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