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Production method of low-formaldehyde-releasing impregnating resin film paper

A technology of impregnated film paper and low formaldehyde release, which is applied in paper, papermaking, paper coating, etc., can solve problems such as not being able to meet market demand, and achieve the goal of ensuring surface physical and chemical properties, improving quality and applicability, and ultra-low formaldehyde release Effect

Active Publication Date: 2017-03-15
GUANGDONG YAODONG FURNITURE BOARD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The minimum formaldehyde emission of impregnated film paper produced by the existing conventional process can only reach 1.0mg / L, which cannot meet the market demand and needs further improvement

Method used

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  • Production method of low-formaldehyde-releasing impregnating resin film paper

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Preparation of urea-formaldehyde resin:

[0031] Formula: 100kg of formaldehyde with a concentration of 37%, 76kg of urea with a concentration of 98%, 15kg of water, and 7kg of compound additives. The molar ratio of formaldehyde to urea, F / U=0.99

[0032] method:

[0033] (1) Put 100kg of formaldehyde into the reactor at one time, put in 32.7kg of urea, add 15kg of water, and adjust the pH to 8.0 with sodium hydroxide solution;

[0034] (2) Open the oil valve and raise the temperature to 80°C, stop the heat supply, let it automatically rise to 85°C, keep warm for 30 minutes, add formic acid solution, control the pH value at 4.5, and carry out polycondensation reaction at 92°C;

[0035] (3) Add 7kg of compound additives and adjust the pH to 7.0 when the glue solution appears dense white mist in 20°C water, and add 24.3kg of urea when the temperature is lowered to 85°C;

[0036] (4) Cool down to 65°C and add 19kg of urea, adjust the pH to 7.0, continue to cool down to ...

Embodiment 2

[0054]The difference between the impregnated film paper described in this embodiment and Example 1 is: the total amount of urea added during the preparation of urea-formaldehyde resin is 78kg, the molar ratio of formaldehyde to urea, F / U=0.96; in the preparation step of urea-formaldehyde resin The add-on of the first batch of urea in (1) is 33.5kg; The add-on of the second batch of urea in the urea-formaldehyde resin preparation step (3) is 25kg; The add-on of the third batch of urea in the urea-formaldehyde resin preparation step (4) is 19.5kg; if there is a parameter range, the middle value of the corresponding parameter range is taken; others are the same as in Example 1.

Embodiment 3

[0056] The difference between the impregnated film paper described in this embodiment and Example 1 is: the total amount of urea added during the preparation of urea-formaldehyde resin is 80kg, the molar ratio of formaldehyde to urea, F / U=0.94; in the preparation step of urea-formaldehyde resin The addition amount of the first batch of urea in (1) is 34.4kg; the addition amount of the second batch of urea in the urea-formaldehyde resin preparation step (3) is 25.6kg; the addition amount of the third batch of urea in the urea-formaldehyde resin preparation step (4) It is 20kg; if there is a parameter range, take the end value of the corresponding parameter range (Example 1 takes the first end value). Others are the same as in Example 1.

[0057] Table 1

[0058] Example 1-3 is compared with the detection value of formaldehyde emission of impregnated film paper on the market as shown in Table 1

[0059]

[0060] It can be seen from Table 1 that the formaldehyde emission of t...

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Abstract

The invention provides a production method of low-formaldehyde-releasing impregnating resin film paper. The production method comprises the following steps: uncoiling raw paper and pre-treating; impregnating the raw paper into a urea formaldehyde resin impregnating solution; conveying the impregnated raw paper into a drying oven; drying at the temperature of 120 DEG C to 140 DEG C for 25s to 35s; cooling the resin film paper which is dried for the first time, coating double faces of the paper with an amine-aldehyde resin solution; conveying the coated resin film paper into the drying oven again, and drying at the temperature of 130 DEG C to 155 DEG C for 35s to 45s; after drying for the second time and cooling, conveying the resin film paper into a cutting machine, and cutting the resin film paper into needed length. According to the low-formaldehyde-releasing impregnating resin film paper provided by the invention, formaldehyde release can be effectively reduced, and the formaldehyde releasing amount is not increased after high-temperature and high-pressure attachment; the quality and applicability of the impregnating resin film paper can be improved.

Description

technical field [0001] The invention relates to the technical field of production of impregnated adhesive film paper, in particular to a production method of impregnated adhesive film paper with low formaldehyde emission. Background technique [0002] With the improvement of people's living standards and the continuous enhancement of environmental protection awareness, the requirements for furniture are getting higher and higher, and the quality control of furniture in international trade is becoming more and more strict. [0003] In recent years, the demand for low-carbon and environmentally friendly furniture has grown rapidly, but currently there is an extreme shortage of high-grade decorative materials suitable for low-carbon and environmentally friendly materials in the domestic market. Formaldehyde-free substrates for making decorative wood-based panels have come out, but there is no matching material for them. Impregnated laminated paper with low formaldehyde emission...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H23/30D21H23/32D21H25/06D21H19/24C08G12/12
CPCC08G12/12D21H19/24D21H23/30D21H23/32D21H25/06
Inventor 曾敏华易志军何义东谭炎新胡硕飞
Owner GUANGDONG YAODONG FURNITURE BOARD
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