A kind of preparation method of impregnated film paper decoration formaldehyde-free wood-based panel

A technology of impregnating adhesive film paper and wood-based panels, which is applied in the jointing of wooden veneers, papermaking, paper, etc., to achieve the effect of increasing the amount of glue hanging and improving the scratch resistance

Active Publication Date: 2021-11-16
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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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  • A kind of preparation method of impregnated film paper decoration formaldehyde-free wood-based panel
  • A kind of preparation method of impregnated film paper decoration formaldehyde-free wood-based panel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] 1) Add polyethylene glycol (molecular weight 200) and isophorone diisocyanate into a reaction kettle with a stirring and reflux device according to a molar ratio of 0.8, and carry out a prepolymerization reaction under the protection of high-purity nitrogen. The temperature is 40°C, and the reaction time is 1h to obtain a polyurethane prepolymer.

[0031] 2) The temperature of the prepolymer was raised to 65° C., and 1,4-butanediol was added dropwise to the prepolymer for 20 minutes. The chain extension reaction lasted 1.5 hours, 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, and the reaction time of this step was 0.5 hours.

[0032] 3) Cool to room temperature, add glacial acetic acid for neutralization, and reduce viscosity with appropriate amount of acetone. After the viscosity is suitable, add water and high-speed shearing. The shearing speed is 200...

Embodiment 2

[0041] 1) Add polyester diol CMA-1024 and isophorone diisocyanate into a reaction kettle with a stirring and reflux device according to a molar ratio of 2, and carry out a prepolymerization reaction under the protection of high-purity nitrogen, and the reaction temperature The temperature is 60°C, the reaction time is 0.5h, and the polyurethane prepolymer is obtained.

[0042] 2) The temperature of the prepolymer was raised 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 minutes, and the reaction time of this step was 1.5 hours.

[0043] 3) Cool to room temperature, add glacial acetic acid for neutralization, and reduce viscosity with appropriate amount of acetone. After the viscosity is suitable, add water and high-speed shearing at a shearing spe...

Embodiment 3

[0052] 1) Add polyester diol CMA-1024, Polyethylene Glycol (both molar ratio 1: 1) and hexamethylene diisocyanate into the reactor with stirring and reflux device according to molar ratio 1.3, in Under the protection of high-purity nitrogen, a prepolymerization reaction was carried out at a reaction temperature of 50° C. and a reaction time of 0.7 h to obtain a polyurethane prepolymer.

[0053] 2) The temperature of the prepolymer was raised to 75° C., and propylene glycol was added dropwise to the prepolymer for 15 minutes, the chain extension reaction time was 0.8 hours, 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 minutes, and the reaction time of this step was 1 hour.

[0054] 3) Cool to room temperature, add glacial acetic acid for neutralization, and reduce viscosity with appropriate amount of acetone. After the viscosity is suitable, add water and high-speed s...

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Abstract

The invention claims to protect a kind of formaldehyde-free wood-based panel impregnated with film paper and its preparation method. After the paper is completely immersed in the formaldehyde-free impregnated adhesive for 20-40s, it is dried at 75-105°C, so that there is no excess on the paper surface. The glue shall prevail; after drying, completely soak the paper in the above adhesive for 10-30s, and then completely dry it at 85-105°C. Choose formaldehyde-free wood-based panels, heat-press the impregnated film paper on the wood-based panels at a pressure of 4-6Mpa and a temperature of 150-210°C for 1-3min. The formaldehyde-free impregnating adhesive comprises: 30-50 parts of water-based polyurethane emulsion, 1-5 parts of nanocellulose, 5-10 parts of filler, and 200-300 parts of water. The artificial board prepared by the present application has no release of free formaldehyde, and truly realizes no formaldehyde.

Description

technical field [0001] The invention relates to a formaldehyde-free wood-based panel with impregnated decorative paper decoration and a preparation method thereof, belonging to the technical field of wood-based panel processing. Background technique [0002] Restricted by the shortage of wood resources and the rise of customized furniture, the application of impregnated film paper veneered wood-based panels is becoming more and more extensive. It is a decorative board based on particleboard, fiberboard and other wood-based panels, and impregnated paper as a decorative material. It has many product specifications, good processing performance, and diverse surface decoration. The surface is wear-resistant, heat-resistant, water-resistant, and chemical pollution-resistant. And excellent properties such as smooth surface and easy cleaning. [0003] The impregnated film paper veneer wood-based panel is that the decorative paper is impregnated with adhesive, dried and hot-pressed ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Application Information

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Patent Type & Authority Patents(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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