CN102877358A - Method for producing low-formaldehyde low-volatile organic compound (VOC) melamine impregnated paper - Google Patents
Method for producing low-formaldehyde low-volatile organic compound (VOC) melamine impregnated paper Download PDFInfo
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- CN102877358A CN102877358A CN 201210389320 CN201210389320A CN102877358A CN 102877358 A CN102877358 A CN 102877358A CN 201210389320 CN201210389320 CN 201210389320 CN 201210389320 A CN201210389320 A CN 201210389320A CN 102877358 A CN102877358 A CN 102877358A
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Abstract
The invention provides a method for producing low-formaldehyde low-volatile organic compound (VOC) melamine impregnated paper. The method comprises the following steps of: making an adhesive, namely preparing an urea-formaldehyde resin adhesive in which the molar ratio of urea to formaldehyde is (1.15-1.30):(1.08-1.12) by an alkali-acid-alkali synthetic process; preparing glue; impregnating for the first time; drying for the first time; impregnating for the second time; drying for the second time; cooling and cutting; paving; and pressing and pasting. According to the method for producing the low-formaldehyde low-VOC melamine impregnated paper, a low-urea low-formaldehyde resin adhesive is blended by reducing the molar ratio of formaldehyde and selecting a reasonable adhesive making process in the adhesive making process; and the content of formaldehyde and VOCs in artificial boards is reduced, the indoor air pollution is reduced, the method has a great significance for protecting the life health of people, and the melamine impregnated paper meets the national standard and can be directly used for indoor shaving boards and oriented strand boards.
Description
Technical field
The present invention relates to a kind of melamine impregnated paper production method, relate in particular to the low VOC melamine impregnated paper production method of a kind of low formaldehyde.
Background technology
Along with people are constantly pursuing the new height of material progress and cultural and ideological progress, the melamine impregnated paper face artificial board is because oil resistant, water-fast, durability against pollution are liked by people deeply by force.Yet the melamine impregnated paper face artificial board in use can discharge formaldehyde and VOC, i.e. volatile organic compounds has influence on people's health.Discharge for artificial board formaldehyde, China GB 18580-2001 has stipulated to be directly used in indoor shaving board, oriented wood chipboard burst size of methanal limit value is E1≤9.0mg/100g.The content of formaldehyde and VOC is alleviated room air pollution in the reduction wood-based plate, and is significant to protection people's life and health.With this, how to address the above problem is the problem that should solve in the production process of melamine impregnated paper.
Summary of the invention
The purpose of this invention is to provide the melamine impregnated paper face artificial board that exists in the low VOC melamine impregnated paper production method solution of a kind of low formaldehyde prior art and in use can discharge formaldehyde and VOC, be volatile organic compounds, have influence on the problem of people's health.
Technical solution of the present invention is:
A kind of low formaldehyde hangs down VOC melamine impregnated paper production method, comprises following production stage: glue, join glue, for the first time dipping, for the first time dry, for the second time dipping, for the second time dry, cooling cutting, mat formation, overlay,
In described glue process, preparation urea and formaldehyde mole ratio are the urea-formaldehyde resin adhesive of 1.15-1.30:1.08-1.12, adopt alkali-Acid-Base synthesis technique, in the first step alkaline reaction technique pH value are transferred to 9, after dropping into urea, be warming up to 80 ℃ of insulations 30 minutes; In second step acid reaction technique, pH value is transferred to 4.6, reacted 40 minutes; In the 3rd step alkaline reaction technique, pH value is transferred to 8, reacted 20 minutes.The relation of above-mentioned middle urea and formaldehyde mole ratio can be regarded as: the mol ratio of urea and formaldehyde is that acquiescence urea molal quantity is portion, and the molal quantity of formaldehyde is that several parts of mol ratios are exactly several, that is: urea and formaldehyde mole ratio are that 1.15-1.30 gets final product.
Further improve and be: the precuring rate of urea-formaldehyde resin adhesive is 60%-77% in described first time dipping process.
Further improve and be: described first time dipping with flood employed additive for the second time and be environment protection additive.
A kind of low formaldehyde of the present invention hangs down VOC melamine impregnated paper production method, comprise following production stage: glue, join glue, for the first time dipping, for the first time dry, for the second time dipping, for the second time dry, cooling cutting, mat formation, overlay, the method that adopts for the discharging that realizes the low VOC of low formaldehyde is: the mol ratio of passing through to reduce formaldehyde in the glue process, and select rational adhesive-preparing technology, urea-formaldehyde resin adhesive is hanged down in modulation; Use environment protection additive in dipping process, namely additive does not contain the organic volatiles such as benzene series, terpenes, selects rational impregnation technology to produce the melamine impregnated paper that the low VOC of low formaldehyde discharges.Simultaneously in first time impregnation technology, increase the precuring rate of urea-formaldehyde resin adhesive in the single-steeping process, avoid the urea-formaldehyde resin adhesive of single-steeping and the melamine glue of double-steeping to mix, affect the performances such as surperficial resistant damage resistant.
The invention has the beneficial effects as follows: a kind of low formaldehyde of the present invention hangs down VOC melamine impregnated paper production method, and the content of formaldehyde and VOC is alleviated room air pollution in the reduction wood-based plate, and is significant to protection people's life and health.Simultaneously in first time impregnation technology, increase the precuring rate of urea-formaldehyde resin adhesive in the single-steeping process, avoid the urea-formaldehyde resin adhesive of single-steeping and the melamine glue of double-steeping to mix, affect the performances such as surperficial resistant damage resistant.The burst size of methanal of the low VOC melamine impregnated paper production method gained melamine impregnated paper of the low formaldehyde of this kind meets limit value E1≤9.0mg/100g, meets national standard, can be directly used in indoor shaving board, oriented wood chipboard.
The specific embodiment
The below describes the preferred embodiments of the present invention in detail.
Present embodiment provides a kind of low formaldehyde to hang down VOC melamine impregnated paper production method, comprise following production stage: glue, join glue, for the first time dipping, for the first time dry, for the second time dipping, for the second time dry, cooling cutting, mat formation, overlay, in described glue process, preparation urea and formaldehyde mole ratio are 1.15-1.30:1.08-1.12, be preferably the urea-formaldehyde resin adhesive of 1.27:1.10, adopt alkali-Acid-Base synthesis technique, in first step alkaline reaction technique, pH value is transferred to 9, after dropping into urea, be warming up to 80 ℃ of insulations 30 minutes; In second step acid reaction technique, pH value is transferred to 4.6, reacted 40 minutes; In the 3rd step alkaline reaction technique, pH value is transferred to 8, reacted 20 minutes.The precuring rate of urea-formaldehyde resin adhesive is 60%-77% in described first time dipping process, is preferably 71%.Described first time dipping with flood employed additive for the second time and be environment protection additive, in the present embodiment, environment protection additive specifically comprises polyamide curing agent, releasing agent MS-N1, X-102B type crude defoamer etc.
A kind of low formaldehyde of present embodiment hangs down VOC melamine impregnated paper production method, comprise following production stage: glue, join glue, for the first time dipping, for the first time dry, for the second time dipping, for the second time dry, cooling cutting, mat formation, overlay, the method that adopts for the discharging that realizes the low VOC of low formaldehyde is: the mol ratio of passing through to reduce formaldehyde in the glue process, and select rational adhesive-preparing technology, urea-formaldehyde resin adhesive is hanged down in modulation; Use environment protection additive in dipping process, namely additive does not contain the organic volatiles such as benzene series, terpenes, selects rational impregnation technology to produce the melamine impregnated paper that the low VOC of low formaldehyde discharges.Simultaneously in first time impregnation technology, increase the precuring rate of urea-formaldehyde resin adhesive in the single-steeping process, avoid the urea-formaldehyde resin adhesive of single-steeping and the melamine glue of double-steeping to mix, affect the performances such as surperficial resistant damage resistant.
The beneficial effect of present embodiment is: a kind of low formaldehyde of present embodiment hangs down VOC melamine impregnated paper production method, and the content of formaldehyde and VOC is alleviated room air pollution in the reduction wood-based plate, and is significant to protection people's life and health.Simultaneously in first time impregnation technology, increase the precuring rate of urea-formaldehyde resin adhesive in the single-steeping process, avoid the urea-formaldehyde resin adhesive of single-steeping and the melamine glue of double-steeping to mix, affect the performances such as surperficial resistant damage resistant.The burst size of methanal of the low VOC melamine impregnated paper production method gained melamine impregnated paper of the low formaldehyde of this kind meets limit value E1≤9.0mg/100g, meets national standard, can be directly used in indoor shaving board, oriented wood chipboard.
Claims (2)
1. a low formaldehyde hangs down VOC melamine impregnated paper production method, comprise following production stage: glue, join glue, for the first time dipping, for the first time dry, for the second time dipping, for the second time dry, cooling cutting, mat formation, overlay, it is characterized in that: in described glue process, preparation urea and formaldehyde mole ratio are the urea-formaldehyde resin adhesive of 1.15-1.30:1.08-1.12, adopt alkali-Acid-Base synthesis technique, in first step alkaline reaction technique, pH value is transferred to 9.0, after dropping into urea, be warming up to 80 ℃ of insulations 30 minutes; In second step acid reaction technique, pH value is transferred to 4.6, reacted 40 minutes; In the 3rd step alkaline reaction technique, pH value is transferred to 8.0, reacted 20 minutes.
2. the low VOC melamine impregnated paper production method of low formaldehyde as claimed in claim 1 is characterized in that: the precuring rate of urea-formaldehyde resin adhesive is 60%-77% in described first time dipping process.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201210389320 CN102877358A (en) | 2012-10-15 | 2012-10-15 | Method for producing low-formaldehyde low-volatile organic compound (VOC) melamine impregnated paper |
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| CN 201210389320 CN102877358A (en) | 2012-10-15 | 2012-10-15 | Method for producing low-formaldehyde low-volatile organic compound (VOC) melamine impregnated paper |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104532677A (en) * | 2014-11-24 | 2015-04-22 | 南通新世纪机电有限公司 | Manufacturing method of melamine impregnated paper |
| CN111531660A (en) * | 2020-05-09 | 2020-08-14 | 中国林业科学研究院木材工业研究所 | Low-formaldehyde impregnated bond paper facing artificial board and preparation method thereof |
| CN112411253A (en) * | 2020-11-20 | 2021-02-26 | 枣庄佳莱堡新材料科技有限公司 | Multi-item detection type low-formaldehyde low-VOC melamine impregnated paper production device |
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2012
- 2012-10-15 CN CN 201210389320 patent/CN102877358A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104532677A (en) * | 2014-11-24 | 2015-04-22 | 南通新世纪机电有限公司 | Manufacturing method of melamine impregnated paper |
| CN111531660A (en) * | 2020-05-09 | 2020-08-14 | 中国林业科学研究院木材工业研究所 | Low-formaldehyde impregnated bond paper facing artificial board and preparation method thereof |
| CN111531660B (en) * | 2020-05-09 | 2022-02-08 | 中国林业科学研究院木材工业研究所 | Low-formaldehyde impregnated bond paper facing artificial board and preparation method thereof |
| CN112411253A (en) * | 2020-11-20 | 2021-02-26 | 枣庄佳莱堡新材料科技有限公司 | Multi-item detection type low-formaldehyde low-VOC melamine impregnated paper production device |
| CN112411253B (en) * | 2020-11-20 | 2022-08-26 | 枣庄佳莱堡新材料科技有限公司 | Multi-item detection type low-formaldehyde low-VOC melamine impregnated paper production device |
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Application publication date: 20130116 |