CN102120333B - Method for manufacturing melamine board with low formaldehyde content - Google Patents
Method for manufacturing melamine board with low formaldehyde content Download PDFInfo
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- CN102120333B CN102120333B CN201010595498.2A CN201010595498A CN102120333B CN 102120333 B CN102120333 B CN 102120333B CN 201010595498 A CN201010595498 A CN 201010595498A CN 102120333 B CN102120333 B CN 102120333B
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- melamine
- glue
- wheat straw
- solution
- formaldehyde content
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- Chemical And Physical Treatments For Wood And The Like (AREA)
- Dry Formation Of Fiberboard And The Like (AREA)
Abstract
The invention relates to a method for manufacturing a plate, in particular to a method for manufacturing a melamine board with low formaldehyde content, which comprises the following steps of: preprocessing raw materials; applying glue; drying; laying; performing hot press; cooling; cutting edges; and sanding. The method is characterized in that: in the preprocessing process, wheat straw is subjected to hammer milling by a crusher, the wheat straw subjected to hammer milling is humidified and bubbled, and solution of melamine is added; and cotton stalks and wood chips are sliced and the solution of melamine is sprayed. By the method, the wheat straw, the cotton stalks and the wood chips are processed, the formaldehyde content in the plate is greatly reduced, the environment is protected, equipment investment is reduced, the energy consumption is reduced and the cost is saved.
Description
Technical field
The present invention relates to a kind of preparation method of sheet material, be specifically related to a kind of preparation method of low formaldehyde content melamine plate.
Background technology
At present commercially available sheet material is mostly the product that adopts common production method to obtain, and its content of formaldehyde is higher, and generally all more than state specified standards 8mg/100g, finished product sheet material need to ventilate and hang for a long time, and nonetheless, formaldehyde can not leave thoroughly.If the content of formaldehyde in sheet material is higher, bring serious injury can to the health of human body.In recent years, the person skilled in sheet material field is being studied the problem that how to reduce content of formaldehyde in sheet material always, does not but search out suitable method.
In addition, aborning, normally adopt single wheat straw, straw, cotton stalk or wood chip is raw material to various sheet material, they is carried out to the techniques such as defibrator process, cooling, boiling, applying glue and process.Wheat straw, straw be without boiling, without defibrator process and cold grinding, directly through dedusting, screening, pulverizing, metering applying glue, mat formation, hot pressing, cut in length and breadth, turnover panel is cooling, sanding processing, stacking, put these techniques in storage and can obtain finished product sheet material; If take cotton stalk as raw material, need boiling, defibrator process, applying glue stick, mat formation, hot pressing; If take wood chip as raw material, need be different from wheat straw and cotton stalk to its boiling, defibrator process, applying glue, its hot pressing curve.That is to say, because above its characteristic of these several raw materials is different, so their processing technology is all different, and thus, if above these several raw materials are processed in same equipment, difficulty is larger.Common sheet material processing adopts different equipment and process to process for different raw materials, and its shortcoming is that the kind of equipment is many, invest greatly, and the energy consumption that unlatching multiple devices bring is also very high.
In order to reduce the content of formaldehyde in sheet material, make sheet material environmental protection more, it is dropped to minimum to the injury of human body, in addition, also in order realizing in equipment of the same race, wheat straw, cotton stalk or wood chip to be processed, to be reduced corresponding equipment investment, reduce the energy consumption of being brought by plurality of devices, therefore a kind of content of formaldehyde in sheet material of reducing to greatest extent need to be designed, and the method that wheat straw, straw, cotton stalk and wood chip are processed can be in same equipment, realized.
Summary of the invention
In order to solve above-mentioned technical problem, the invention provides and a kind ofly can effectively reduce content of formaldehyde melamine board manufacturing method in melamine plate, adopt the method to greatly reduce the content of formaldehyde in melamine plate, also realized wheat straw, cotton stalk and wood chip and in same equipment, be processed into melamine plate.
The preparation method of low formaldehyde content melamine plate of the present invention, realizes by following technical scheme:
Low formaldehyde content melamine plate and preparation method thereof, comprise raw material pre-treatment, add glue, be dried, mat formation, hot pressing, cooling, cutting edge and sanding step, in pretreatment process, with pulverizer, wheat straw is hammered into shape broken, can adopt beater grinder, broken due to wheat straw only need be hammered into shape, without section, therefore select beater grinder can reach the effect that material is thoroughly pulverized, to hammering the macerating of material humidification after broken into shape, then add melamine solution in the material after macerating of humidification; For cotton stalk and wood chip, need its first slicing treatment, and then spray melamine solution; The concentration that adds above melamine solution in wheat straw, cotton stalk, wood chip is 8%～12%, and preferred concentration is 10%, and the time that adds melamine solution to keep is 1～10h.
The addition of melamine solution be material heavy 8%～12%, preferred addition is weight of material 10%, when the addition of melamine surpasses above scope, can cause waste; If the addition of melamine is than above scope hour, its effect of removing formaldehyde is bad, can not make the content of formaldehyde drop to minimum, because of the melamine solution of the above-mentioned content range of a little selection.
In adding glue process, add melamine modified urea-formaldehyde glue, its addition is 150～190kg/m
3plate, preferably 170kg/m
3plate.
Concrete steps of the present invention are:
A. with pulverizer, wheat straw is pulverized, then macerating of humidification; By cotton stalk, wood chip section;
B. in the wheat straw after macerating of humidification, add melamine solution, on cotton stalk after section, wood chip, spray melamine solution, the concentration of said melamine solution is 8%～12% above, preferably 10%, its addition be material heavy 8%～12%, preferably 10%, adding the time keeping after melamine solution is 1～10h;
C. the wheat straw after melamine solution is processed in step b is added to glue, in step b, after melamine solution is processed, cotton stalk, wood chip add glue after defibrator process again, and above added glue is melamine modified urea-formaldehyde glue, and its addition is 150～190kg/m
3, 170kg/m preferably
3;
D. to adding fibrous material dries after glue, mat formation, hot pressing, cooling, cutting edge, sanding.
Beneficial effect of the present invention is, owing to adding, has added man-hour melamine solution to process material in raw material, greatly reduces the content of formaldehyde in sheet material; Broken to wheat straw hammer with beater grinder to wheat straw in addition, macerating of humidification, can spread out fiber wherein, to cotton stalk, wood chip section, above several raw material can be processed in equipment of the same race.Therefore, the technique adopting by the present invention is produced melamine plate, not only greatly reduces the content of formaldehyde in sheet material, has protected environment, has also reduced the input amount of equipment, has reduced energy consumption, has saved cost.
The specific embodiment
Below in conjunction with the specific embodiment, the present invention is further described, so that those skilled in the art more understands the present invention.
Embodiment 1
A. with beater grinder, wheat straw is hammered into shape broken;
B. the macerating of wheat straw humidification of hammering into shape after broken processed, till soaking completely to wheat straw fiber, and then add concentration be melamine solution, its addition of 8% be material heavy 8%, the time of maintenance is 5h;
D. the material after step c processes is added to glue, added glue is melamine modified urea-formaldehyde glue, and its addition is 190kg/m
3;
E. to adding sheet material after glue, be dried, mat formation, hot pressing, cooling, cutting edge, sanding.
Recording content of formaldehyde is 1.2 mg/100g, lower than state specified standards 8mg/100g.
Embodiment 2
A. with slicer, cotton stalk is cut into slices;
B. in the cotton stalk after section, adding concentration is 10% melamine solution, its addition be material heavy 10%, the time of maintenance is 8h;
C. by the material defibrator process after step b processes, add glue, added glue is melamine modified urea-formaldehyde glue, its addition is 170kg/m
3;
D. to adding cotton stalk fiber after glue, be dried, mat formation, hot pressing, cooling, cutting edge, sanding.
Content of formaldehyde is 1.8 mg/100g, lower than state specified standards 8mg/100g.
Embodiment 3
A. with slicer, wood chip is cut into slices;
B. in the wood chip after section, adding concentration is 12% melamine solution, its addition be material heavy 12%, the time of maintenance is 10h;
C. by the wood chip defibrator process after step b processes, add glue, added glue is melamine modified urea-formaldehyde glue, its addition is 150kg/m
3;
D. to adding sheet material after glue, be dried, mat formation, hot pressing, cooling, cutting edge, sanding.
Content of formaldehyde is 1.5 mg/100g, lower than state specified standards 8mg/100g.
Claims (4)
1. a preparation method for low formaldehyde content melamine plate, comprises raw material pre-treatment, adds glue, is dried, mats formation, hot pressing, cooling, cutting edge and sanding step, it is characterized in that, the method comprises following step:
A. with pulverizer, wheat straw is pulverized, then macerating of humidification; By cotton stalk, wood chip section;
B. in the wheat straw after macerating of humidification, add melamine solution, on cotton stalk after section, wood chip, spray melamine solution, the concentration of said melamine solution is 8%～12% above, its addition be material heavy 8%～12%, adding the time keeping after melamine solution is 1～10h;
C. the wheat straw after melamine solution is processed in step b is added to glue, in step b, after melamine solution is processed, cotton stalk, wood chip add glue after defibrator process again, and above added glue is melamine modified urea-formaldehyde glue, and its addition is 150～190kg/m
3;
D. to adding fibrous material dries after glue, mat formation, hot pressing, cooling, cutting edge, sanding.
2. the preparation method of a kind of low formaldehyde content melamine plate as claimed in claim 1, is characterized in that, the concentration of described melamine solution is 10%.
3. the preparation method of a kind of low formaldehyde content melamine plate as claimed in claim 1, is characterized in that, described melamine solution addition be material heavy be 10%.
4. the preparation method of a kind of low formaldehyde content melamine plate as claimed in claim 1, is characterized in that, melamine modified urea-formaldehyde glue addition 170kg/m in described step c
3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010595498.2A CN102120333B (en) | 2010-12-20 | 2010-12-20 | Method for manufacturing melamine board with low formaldehyde content |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010595498.2A CN102120333B (en) | 2010-12-20 | 2010-12-20 | Method for manufacturing melamine board with low formaldehyde content |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102120333A CN102120333A (en) | 2011-07-13 |
| CN102120333B true CN102120333B (en) | 2014-01-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201010595498.2A Expired - Fee Related CN102120333B (en) | 2010-12-20 | 2010-12-20 | Method for manufacturing melamine board with low formaldehyde content |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108115804A (en) * | 2017-12-21 | 2018-06-05 | 贺州宝兴新材料有限公司 | A kind of production method of new melamine plate |
| CN108115801A (en) * | 2017-12-21 | 2018-06-05 | 贺州宝兴新材料有限公司 | A kind of preparation method of low formaldehyde melamine plate |
| CN110666918A (en) * | 2019-10-16 | 2020-01-10 | 哈尔滨理工大学 | Process method for manufacturing artificial wood board by using camellia oleifera shells |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1215362A (en) * | 1996-04-12 | 1999-04-28 | 马利特有限公司 | Method for production of lignocellulosic composite materials |
| CN1512931A (en) * | 2001-04-03 | 2004-07-14 | �������о�ίԱ�ṫ˾ | Methods of straw fiber processing |
| CN101426624A (en) * | 2006-03-13 | 2009-05-06 | 艾伯塔研究委员会公司 | Using lipid to improve lignocellulosic fibre bonding and dimensional performance |
| CN101791817A (en) * | 2010-02-05 | 2010-08-04 | 浙江省林业科学研究院 | Production method of environmental-friendly type low-cost middle and high density fiber board |
-
2010
- 2010-12-20 CN CN201010595498.2A patent/CN102120333B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1215362A (en) * | 1996-04-12 | 1999-04-28 | 马利特有限公司 | Method for production of lignocellulosic composite materials |
| CN1512931A (en) * | 2001-04-03 | 2004-07-14 | �������о�ίԱ�ṫ˾ | Methods of straw fiber processing |
| CN101426624A (en) * | 2006-03-13 | 2009-05-06 | 艾伯塔研究委员会公司 | Using lipid to improve lignocellulosic fibre bonding and dimensional performance |
| CN101791817A (en) * | 2010-02-05 | 2010-08-04 | 浙江省林业科学研究院 | Production method of environmental-friendly type low-cost middle and high density fiber board |
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| Publication number | Publication date |
|---|---|
| CN102120333A (en) | 2011-07-13 |
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