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Aldehyde-free plate

A technology for board and particle board, applied in the field of formaldehyde-free board, can solve the problems of high cost and complicated preparation process, and achieve the effects of low cost, simple production process and good water solubility

Active Publication Date: 2020-04-03
SHANDONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the existing inventions propose a variety of new adhesives, the preparation process is relatively complicated, the cost is high, and there are still certain limitations in practical application.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Manganese dioxide catalyst preparation

[0042] Weigh 1.57g KMnO 4 , 1.69g MnSO 4 ·H 2 O and 0.23g of glucose were dissolved in 150ml of deionized water, mixed thoroughly, and reacted in a water bath at 70°C for 7 hours. After the reaction was completed, 35mL of deionized water was added to dilute to obtain a manganese dioxide catalyst slurry. Alternatively, the reaction product is directly filtered and dried at 60° C. to obtain a powder catalyst.

[0043] Wood-based panel coating

[0044] The single-layer board is coated according to the catalyst coating amount of 0.004g / cm 2 The above-mentioned manganese dioxide catalyst slurry was coated, and pressed into plywood by hot pressing at a pressing temperature of 150° C., a pressure of 5 MPa, and a hot pressing time of 4 minutes. The surface layer of plywood is based on the catalyst coating amount of 0.005g / cm 2 The manganese dioxide catalyst slurry described above was coated. Blow drying at 70°C to obtain formaldeh...

Embodiment 2

[0047] Manganese dioxide catalyst preparation

[0048] Weigh 1.57g KMnO 4 , 2.01g MnSO 4 ·H 2 O and 0.15 g of glucose were dissolved in 130 ml of deionized water, mixed thoroughly, and reacted in a water bath at 60° C. for 6 hours. After the reaction, 40 mL of deionized water was added to dilute to obtain a manganese dioxide catalyst slurry. Alternatively, the reaction product is directly filtered and dried at 60° C. to obtain a powder catalyst.

[0049] Wood-based panel coating

[0050] The single-layer board is coated according to the catalyst coating amount of 0.004g / cm 2 Coating the above-mentioned manganese dioxide catalyst slurry, adding urea-formaldehyde adhesive and pressing into plywood by hot pressing, the pressing temperature is 160° C., the pressure is 6 MPa, and the hot pressing time is 4.5 min. The surface layer of plywood is based on the catalyst coating amount of 0.005g / cm 2 The manganese dioxide catalyst slurry described above was coated. Blow drying at...

Embodiment 3

[0053] Manganese dioxide catalyst preparation

[0054] Weigh 1.57g KMnO 4 , 1.82g MnSO 4 ·H 2 O and 0.21g of citric acid were dissolved in 130ml of deionized water, mixed thoroughly and then reacted in a water bath at 80°C for 9h. After the reaction was completed, 40mL of deionized water was added to dilute to obtain a manganese dioxide catalyst slurry. Alternatively, the reaction product is directly filtered and dried at 60° C. to obtain a powder catalyst.

[0055] Wood-based panel coating

[0056] The single-layer board is coated according to the catalyst coating amount of 0.006g / cm 2 Coating the above-mentioned manganese dioxide catalyst slurry, adding urea-formaldehyde adhesive and pressing into plywood by hot pressing, the pressing temperature is 155° C., the pressure is 7 MPa, and the hot pressing time is 4.5 min. The surface layer of plywood is based on the catalyst coating amount of 0.007g / cm 2 The manganese dioxide catalyst slurry described above was coated. Bl...

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Abstract

The invention provides an aldehyde-free plate. The aldehyde-free plate contains a manganese dioxide catalyst, and a preparing method of the manganese dioxide catalyst comprises the steps of dissolvinga raw material in water and performing a heating reaction to obtain the manganese dioxide catalyst. The raw material comprises potassium permanganate, manganese sulfate and a reducing agent. A bonding agent used by the aldehyde-free plate is urea formaldehyde type bonding agent. The aldehyde-free plate is aldehyde-free, environment-friendly, low in cost, simple in manufacturing process, and capable of effectively preventing or reducing releasing of f ormaldehyde in the bonding agent to the indoor environment.

Description

technical field [0001] The invention relates to the field of plates, in particular to a formaldehyde-free plate. Background technique [0002] Today, with the rapid economic development, people's quality of life has been greatly improved, and people's requirements for indoor air quality are also stricter. The rise and popularization of interior decoration has caused a series of air pollution problems, so indoor air quality has attracted more and more attention. The urea-formaldehyde resin adhesive used in interior decoration materials such as wooden furniture and wood-based panels contains a large amount of formaldehyde, which is slowly released in the indoor environment, making formaldehyde the main pollutant of indoor air. Aiming at the characteristics of low concentration and long release period of formaldehyde, people have done a lot of research work on how to remove indoor formaldehyde. [0003] In order to solve the problem of excessive indoor formaldehyde concentrat...

Claims

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Application Information

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IPC IPC(8): B27D1/04B32B21/04B01D53/86B01D53/72B01J23/34
CPCB01D53/8668B01J23/34B27D1/04B32B21/042B32B2255/08B32B2255/20
Inventor 梁鹏张文睿张亚青齐秋平焦甜甜张华伟柏广明
Owner SHANDONG UNIV OF SCI & TECH
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