CN101244579B - Flakeboard and method of manufacturing the same - Google Patents
Flakeboard and method of manufacturing the same Download PDFInfo
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- CN101244579B CN101244579B CN2008101021014A CN200810102101A CN101244579B CN 101244579 B CN101244579 B CN 101244579B CN 2008101021014 A CN2008101021014 A CN 2008101021014A CN 200810102101 A CN200810102101 A CN 200810102101A CN 101244579 B CN101244579 B CN 101244579B
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Abstract
The invention relates to a particle board with low formaldehyde emission and the preparation method, wherein, the preparation method comprises the following steps: grinding the tea waste into fibrous or powder material; well mixing the fibrous or powder material and wood chips; applying adhesive to form mixture; forming the mixture into billets and pressing into particle boards. Ammonia or alkaline salt solution can be sprayed on the tea waste before being ground for activating treatment. The preparation method has the advantages that the tea waste and the wood chips are mixed for use; formaldehyde emission in the particle board is fundamentally reduced through the chemical reaction of the tea waste and the formaldehyde, the effect is obvious, permanent and free from rebound; the mechanical property of the prepared particle board is not reduced, but increased somewhat.
Description
Technical field
The present invention relates to a kind of flakeboard and preparation method thereof, particularly a kind of flakeboard and preparation method thereof with low burst size of methanal.
Background technology
Reform and open up to the outside world over nearly 30 years, the timber industry of China has obtained fast development.2006,1,270 hundred million yuan of China's wood-based plate output values, wood-based plate total output 7428 ten thousand steres, wherein flakeboard 843 ten thousand steres.Wood-based plate total output, furniture output all occupy the No. 1 in the world.
Because what generally adopt in the Wood-based Panel Production is that formaldehyde is adhesive, particularly use urea-formaldehyde resin adhesive in a large number, causing wood-based plate and goods thereof (furniture, timber floor, indoor wooden decorative material etc.) to exist formaldehyde and discharge problem, is the main source that formaldehyde pollutes in the room air pollution.
Along with the raising day by day of health of people consciousness, indoor environment consciousness, quality of life consciousness, artificial board formaldehyde discharges the contaminated air, the problem that impairs one's health that cause and more and more is subject to people's attention.City in China, after " coal smoke type ", " photochemical fog type " polluted, the modern was just fallen into the 3rd pollution period that with " room air pollution " is sign.A Beijing City indoor pollution quality testing is surveyed the result and is shown, the room air pollution degree than outdoor high 4-8 doubly; The mean concentration that is called as the formaldehyde of one of " four big stealthy killers " exceeds standard 6-7 doubly.Formaldehyde has spread effect to eye, mucous membrane and respiratory tract, can cause degradation under chronic respiratory disease, allergic rhinitis, the immunologic function; Being considered to potential carcinogen, may be the inducement of rhinocarcinoma, throat cancer, cutaneum carcinoma.According to statistics, the death toll that exceeds the quata that China is caused by room air pollution every year reaches 11.1 ten thousand people, several 220,000 person-times of the outpatient service that exceeds the quata, several 4,300,000 person-times of the emergency treatment that exceeds the quata.Solve artificial board formaldehyde release problem and arrived instant stage.
At present, the method for reduction artificial board formaldehyde burst size mainly contains: 1) adopt low mol ratio modified urea-formaldehyde resin adhesive; 2) adopt other environmental-protection type adhesives; 3) add formaldehyde catching agent at wood-based plate in urea-formaldehyde resin adhesive; 4) wood-based plate is carried out post processing.But these technical methods all exist such or such defective.As, 1) though adopt low mol ratio modified urea-formaldehyde resin adhesive can effectively reduce the burst size of methanal of wood-based panel product, the bonding strength of product also often reduces, and can not meet the demands; Prolong hardening time, and production efficiency reduces; 2) adopt other environmental-protection type adhesives, as the isocyanates adhesive, cause the production cost of wood-based plate often to increase considerably, enterprise and user are difficult to accept; 3) add formaldehyde catching agent at wood-based plate in urea-formaldehyde resin adhesive,, often reduce the bonding strength of wood-based plate simultaneously though can effectively reduce the free formaldehyde in artificial plate burst size; Simultaneously, general formaldehyde catching agent price often is higher than urea-formaldehyde resin adhesive far away, its adding has just improved product cost, reduced product competitiveness, for example the FC-5 formaldehyde catching agent price of the big deer development Co., Ltd. of Japan production is 50000 yuan/ton, if add 1%-2% in glue, Lauxite cost then per ton will improve 500～1000 yuan; 4) wood-based plate is carried out post processing, it as publication number the manufacturing process that discloses a kind of E1/E0 level environment friendly artificial board in the application for a patent for invention of CN1526528, adopt the ammonia vacuum method, publication number is to disclose a kind for the treatment of apparatus that reduces artificial board formaldehyde burst size in the utility model patent of CN2394770, and is bigger but equipment for after-treatment is often invested.
Summary of the invention
The objective of the invention is at problems of the prior art, a kind of flakeboard and preparation method thereof is provided, it is the additive that raw material is made that the present invention adopts the low and nontoxic tealeaves of cost own, this additive directly mixes to make with wooden particle and is used for preparing flakeboard, can effectively reduce the burst size of methanal in the flakeboard, guarantee that simultaneously the physical and chemical index of flakeboard meets the requirement of wood-based plate GB GB/T17657-1999.
The preparation method of the flakeboard that provides according to an aspect of the present invention comprises following step in sequence: 1) the tealeaves waste material is ground into fibrous or Powdered material; 2) fibrous or Powdered material and wooden particle are mixed and apply adhesive formation mixture; 3) with the mixture assembly and be pressed into flakeboard sheet material.
Wherein, the weight portion proportioning of wooden particle and tealeaves waste material is 100: 10-30.
In addition, the inventive method comprises that also the tealeaves waste material dries the moisture content that requires with it before pulverizing, and moisture content is 8-10%.
Wherein, the tealeaves waste material in the step 1) can adopt ammoniacal liquor or alkaline salt solution to spray described tealeaves waste material for the particle through activation processing, so that described tealeaves waste material is carried out activation processing, when carrying out activation processing, temperature controllable is 20-30 ℃, and the airtight holding time is 20-30 hour.Wherein, the concentration of the ammonia spirit of employing is 1-2%, is preferably 1.5%; And the weight proportion of ammoniacal liquor and tealeaves waste material is 5-10: 100, be preferably 6: 100; The concentration of the alkaline salt solution that adopts is 0.5-1.5%, be preferably 0.8-1.2%, and the weight proportion of alkaline salt solution and tealeaves waste material is 5-10: 100, be preferably 6: 100, alkaline salt solution is selected from one or more in sodium bicarbonate solution, sodium carbonate liquor, potassium bicarbonate solution, the solution of potassium carbonate.
Particularly, the activated processing of tealeaves waste material and make the tealeaves after the processing have the function of eliminating formaldehyde.
A kind of flakeboard is provided according to a further aspect of the invention, comprises wooden particle and adhesive, also comprise the tealeaves waste material.
Wherein, the weight portion proportioning of wooden particle and tealeaves waste material is 100: 10-30.
Particularly, the tealeaves waste material is the particle of activated processing, the tealeaves waste material of activation processing has the effect of eliminating formaldehyde, can adopt ammoniacal liquor or alkaline salt solution to spray the tealeaves waste material, so that the tealeaves waste material is carried out activation processing, when carrying out activation processing, temperature controllable is 20-30 ℃, and the airtight holding time is 20-30 hour.Wherein, the concentration of the ammoniacal liquor of employing is 1-2%, is preferably 1.5%; And the weight proportion of ammoniacal liquor and tealeaves waste material is 5-10: 100, be preferably 6: 100; The concentration of the alkaline salt solution that adopts is 0.5-1.5%, be preferably 0.8-1.2%, and the weight proportion of alkaline salt solution and tealeaves waste material is 5-10: 100, be preferably 6: 100, alkaline salt solution is selected from one or more in sodium bicarbonate solution, sodium carbonate liquor, potassium bicarbonate solution, the solution of potassium carbonate.
Advantage applies of the present invention is in the following areas:
1, the present invention mixes use by the tealeaves waste material of activation with wooden particle, in flakeboard manufacturing use can with formaldehyde generation chemical reaction, fundamentally reduced the flakeboard burst size of methanal preferably, effect significantly and lastingly and not can rebound;
2, the present invention adopts the tealeaves waste material to mix use as additive with wooden particle, and the flakeboard mechanical property of preparation not only can not reduce, and increases;
3, the manufacturing cost of tealeaves waste material of the present invention itself and wooden particle cost are close, and have therefore guaranteed that the manufacturing cost of flakeboard can not improve.
The specific embodiment
Describe content of the present invention in detail below by the specific embodiment.
The tealeaves waste material is taken from the tealeaves residue after the processing through the water extracting of tea Health Products Enterprises.It is 5-8% that the tealeaves waste material is dried to moisture content.The tealeaves waste material can also be the leftover bits and pieces that comes from tea finish machine.
The wood particle is selected poplar particle, the various particles that can also select wood-based plate processing enterprise generally to use.
Embodiment 1
The additive and the flakeboard of the present invention that are used for flakeboard of the present invention according to the following steps preparation:
1, get the raw materials ready according to following weight portion proportioning:
Ammonia spirit (mass percent concentration 1%) 5kg
Tealeaves waste material 100kg
2, the activation processing of tealeaves waste material
Ammonia spirit is evenly sprayed on the tealeaves waste material, and after stirring, airtight insulation is 24 hours in 20 ℃ of following polybags;
3, the drying of tealeaves waste material, pulverizing
After the tealeaves waste material of activated processing placed dryer to dry to be 8% to moisture content, it is ground into fibrous, the tealeaves powder that obtains is the tealeaves additive that is used for flakeboard of the present invention;
4, additive and wooden particle mixes
With the tealeaves additive of gained and moisture content is that 8% poplar particle mixes than the ratio that is 10: 100 by weight, obtains compound;
5, prepare flakeboard according to common flakeboard production technology:
1) wherein, the quality index of Lauxite (mol ratio of urea and formaldehyde is 1: 1.2) is as follows to prepare impregnation raw material (all calculating by solid content) according to the weight proportion of Lauxite 100kg, ammonium chloride 1kg:
Solids content 60-65%
PH value 7.0-7.2
Viscosity (20 ℃) 150-400mPas
Free formaldehyde content＜0.2%
20-30 days storage period
2) Lauxite that measures is mixed with ammonium chloride, it is stand-by to stir.
3) applying glue: adopt glue mixer in the compound of poplar particle and activation tealeaves waste material, to mix urea-formaldehyde resin adhesive, stir.Resin added is 10% (calculating by resin solid content and over dry wood shavings).
The Lauxite that the present invention uses is not limited to above-mentioned Lauxite, and various common Lauxite and modified urea-formaldehyde resin that factory generally adopts also all are suitable for.
4) mat formation: with spreading machine after with applying glue the poplar particle and the compound of activation tealeaves waste material additive make slab.
5) precompressed: the slab after paving is at room temperature carried out precompressed, and preload pressure is 1.8MPa, squeeze time 30s.
6) hot-forming: the slab to precompressed carries out hot pressing, and hot pressing temperature is 180 ℃, and hot pressing time is 20s/mm, and hot pressing pressure is 2.5MPa, makes the thick flakeboard of 18mm, through after cutting, obtains product of the present invention.
Press GB/T17657-1999 " Test methods of evaluating the properties of woodbased panels and surface decorated woodbased panels " and detect the flakeboard physicochemical property, burst size of methanal adopts perforation method to detect, and the results are shown in Table 1.
Embodiment 2
Prepare additive and the flakeboard that is used for flakeboard of the present invention according to following steps:
1, getting the raw materials ready according to following weight portion proportioning:
Ammonia spirit (mass percent concentration 2%) 10kg
Tealeaves waste material 100kg
2, the activation processing of tealeaves waste material
Ammonia spirit is evenly sprayed on the tealeaves waste material, and after stirring, airtight insulation is 30 hours in 30 ℃ of following polybags;
3, the drying of tealeaves waste material, pulverizing
After the tealeaves waste material of activated processing placed dryer to dry to be 10% to moisture content, it is ground into fibrous, the tealeaves powder that obtains is the tealeaves additive that is used for flakeboard of the present invention;
4, additive and wooden particle mixes
With the tealeaves additive that is used for flakeboard of gained and moisture content is that 10% poplar particle mixes than the ratio that is 20: 100 by weight, obtains compound;
5, prepare flakeboard according to common flakeboard production technology, the preparation technology of flakeboard is with embodiment 1.
Press GB/T17657-1999 " Test methods of evaluating the properties of woodbased panels and surface decorated woodbased panels " and detect the flakeboard physicochemical property, the results are shown in Table 1.
Embodiment 3
Prepare additive and the flakeboard that is used for flakeboard of the present invention according to following steps:
1, getting the raw materials ready according to following weight portion proportioning:
Ammonia spirit (mass percent concentration 1.5%) 6kg
Tealeaves waste material 100kg
2, the activation processing of tealeaves waste material
Ammonia spirit is evenly sprayed on the tealeaves waste material, and after stirring, airtight insulation is 24 hours in 30 ℃ of following polybags.
3, the drying of tealeaves waste material, pulverizing
After the tealeaves waste material of activated processing placed dryer to dry to be 8% to moisture content, it is ground into powdery, the tealeaves powder that obtains is the tealeaves additive that is used for flakeboard of the present invention;
4, additive and wooden particle mixes
With the tealeaves additive that is used for flakeboard of gained and moisture content is that 8% poplar particle mixes than the ratio that is 30: 100 by weight, obtains compound;
5, prepare flakeboard according to common flakeboard production technology.The preparation technology of flakeboard is with embodiment 1.
Press GB/T17657-1999 " Test methods of evaluating the properties of woodbased panels and surface decorated woodbased panels " and detect the flakeboard physicochemical property, the results are shown in Table 1.
Embodiment 4
Prepare additive and the flakeboard that is used for flakeboard of the present invention according to following steps:
1, getting the raw materials ready according to following weight portion proportioning:
Sodium bicarbonate solution (mass percent concentration 0.5%) 5kg
Tealeaves waste material 100kg
2, the activation processing of tealeaves waste material
Sodium carbonate liquor is evenly sprayed on the tealeaves waste material, and after stirring, airtight insulation is 24 hours in 30 ℃ of following polybags;
3, the drying of tealeaves waste material, pulverizing
After the tealeaves waste material of activated processing placed dryer to dry to be 8% to moisture content, it is ground into fibrous, the tealeaves powder that obtains is the tealeaves additive that is used for flakeboard of the present invention;
4, additive and wooden particle mixes
With the tealeaves additive that is used for flakeboard of gained and moisture content is that 8% poplar particle mixes than the ratio that is 30: 100 by weight, obtains compound;
5, prepare flakeboard according to common flakeboard production technology, the preparation technology of flakeboard is with embodiment 1.
Press GB/T17657-1999 " Test methods of evaluating the properties of woodbased panels and surface decorated woodbased panels " and detect the flakeboard physicochemical property, the results are shown in Table 1.
Embodiment 5
Prepare additive and the flakeboard that is used for flakeboard of the present invention according to following steps:
1, getting the raw materials ready according to following weight portion proportioning:
Sodium bicarbonate solution (mass percent concentration 1%) 10kg
Tealeaves waste material 100kg
2, the activation processing of tealeaves waste material
Sodium carbonate liquor is evenly sprayed on the tealeaves waste material, and after stirring, airtight insulation is 30 hours in 20 ℃ of following polybags;
3, the drying of tealeaves waste material, pulverizing
After the tealeaves waste material of activated processing placed dryer to dry to be 10% to moisture content, it is ground into fibrous, the tealeaves powder that obtains is the tealeaves additive that is used for flakeboard of the present invention;
4, additive and wooden particle mixes
With the tealeaves additive that is used for flakeboard of gained and moisture content is that 10% poplar particle mixes than the ratio that is 20: 100 by weight, obtains compound;
5, prepare flakeboard according to common flakeboard production technology, the preparation technology of flakeboard is with embodiment 1.
Press GB/T17657-1999 " Test methods of evaluating the properties of woodbased panels and surface decorated woodbased panels " and detect the flakeboard physicochemical property, the results are shown in Table 1.
Embodiment 6
Prepare additive and the flakeboard that is used for flakeboard of the present invention according to following steps:
1, getting the raw materials ready according to following weight portion proportioning:
Sodium bicarbonate solution (mass percent concentration 1.5%) 6kg
Tealeaves waste material 100kg
2, the activation processing of tealeaves waste material
Ammonium chloride solution is evenly sprayed on the tealeaves waste material, and after stirring, airtight insulation is 24 hours in 20 ℃ of following polybags;
3, the drying of tealeaves waste material, pulverizing
After the tealeaves waste material of activated processing placed dryer to dry to be 9% to moisture content, it is ground into fibrous, the tealeaves powder that obtains is the tealeaves additive that is used for flakeboard of the present invention;
4, additive and wooden particle mixes
With the tealeaves additive that is used for flakeboard of gained and moisture content is that 9% poplar particle mixes than the ratio that is 10: 100 by weight, obtains compound;
5, prepare flakeboard according to common flakeboard production technology, the preparation technology of flakeboard is with embodiment 1.
Press GB/T17657-1999 " Test methods of evaluating the properties of woodbased panels and surface decorated woodbased panels " and detect the flakeboard physicochemical property, the results are shown in Table 1.
Embodiment 7
1, will be ground into fibrously without the tealeaves waste material 100Kg of activation processing, obtain the additive that is used for flakeboard of the present invention.
2, be that 8% poplar particle mixes than the ratio that is 10: 100 by weight with the tealeaves waste material additive that is used for flakeboard of gained and moisture content, obtain compound.
3, prepare flakeboard according to common flakeboard production technology, the preparation technology of flakeboard is with embodiment 1.
Press GB/T17657-1999 " Test methods of evaluating the properties of woodbased panels and surface decorated woodbased panels " and detect the flakeboard physicochemical property, the results are shown in Table 1.
Embodiment 8
Except that the tealeaves waste material additive that is used for flakeboard with the poplar particle mixes by 20: 100 weight portion proportionings, all the other are identical with embodiment 7.
Press GB/T17657-1999 " Test methods of evaluating the properties of woodbased panels and surface decorated woodbased panels " and detect the flakeboard physicochemical property, the results are shown in Table 1.
Embodiment 9
Except that the tealeaves waste material additive that is used for flakeboard with the poplar particle mixes by 30: 100 weight portion proportionings, all the other are identical with embodiment 7.
Press GB/T17657-1999 " Test methods of evaluating the properties of woodbased panels and surface decorated woodbased panels " and detect the flakeboard physicochemical property, the results are shown in Table 1.
Reference examples 1
Except not adding the tealeaves waste material, adopt with embodiment 1-9 in identical poplar particle, prepare the thick flakeboard of 18mm according to identical technology.
Press GB/T17657-1999 " Test methods of evaluating the properties of woodbased panels and surface decorated woodbased panels " and detect the flakeboard physicochemical property, the results are shown in Table 1.
Table 1 flakeboard physicochemical property check result
Experimental result shows that burst size of methanal significantly reduces in the flakeboard of employing the inventive method preparation.The burst size of methanal of embodiment 1-6 relative comparison example 1 77.7%-83.0% that descended.Therefore, when the activation tealeaves waste material that adopts the inventive method to prepare is used as the flakeboard raw material, can effectively reduce the burst size of methanal that glueds joint goods.
The testing result of table 1 also illustrates: when the tealeaves waste material of the activation processing of employing process the inventive method preparation is used as the flakeboard raw material, and the unobvious reduction of the mechanical property of flakeboard, dosage is 10 o'clock even raising is arranged slightly.
When the testing result of table 1 illustrates also among the embodiment 7-9 that tealeaves waste material without activation processing is as the flakeboard raw material, also can effectively reduce the burst size of methanal that flakeboard glueds joint goods, comparing as a rule, 1 burst size of methanal reduced rate has reached 65.6-74.1%, though the mechanical property of flakeboard has decline slightly, still can meet national standard.
Claims (7)
1. the preparation method of a flakeboard comprises following step in sequence:
1) the tealeaves waste material is ground into fibrous or Powdered material;
2) fibrous or Powdered material and wooden particle are mixed and apply adhesive formation mixture;
3) with the mixture assembly and be pressed into sheet material,
Wherein, the tealeaves waste material adopts ammoniacal liquor or alkaline salt solution to carry out activation processing.
2. the preparation method of flakeboard as claimed in claim 1, it is characterized in that: the concentration of described ammonia spirit is 1-2%, and the weight proportion of ammonia spirit and tealeaves waste material is 5-10: 100.
3. the preparation method of flakeboard as claimed in claim 1, it is characterized in that: the concentration of described alkaline salt solution is 0.5-1.5%, and the weight proportion of alkaline salt solution and tealeaves waste material is 5-10: 100.
4. the preparation method of flakeboard as claimed in claim 3, it is characterized in that: described alkaline salt solution is selected from one or more in sodium bicarbonate solution, sodium carbonate liquor, potassium bicarbonate solution, the solution of potassium carbonate.
5. as the preparation method of the arbitrary described flakeboard of claim 1-4, it is characterized in that when carrying out described activation processing, the control temperature is 20-30 ℃, the time is 20-30 hour.
6. a flakeboard comprises wooden particle and adhesive, it is characterized in that also comprising adopting ammoniacal liquor or alkaline salt solution to carry out the tealeaves waste material of activation processing.
7. flakeboard as claimed in claim 6, the weight portion proportioning that it is characterized in that wooden particle and tealeaves waste material is 100: 10-30.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2008101021014A CN101244579B (en) | 2008-03-17 | 2008-03-17 | Flakeboard and method of manufacturing the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2008101021014A CN101244579B (en) | 2008-03-17 | 2008-03-17 | Flakeboard and method of manufacturing the same |
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| CN101244579A CN101244579A (en) | 2008-08-20 |
| CN101244579B true CN101244579B (en) | 2010-09-08 |
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| CN2008101021014A Expired - Fee Related CN101244579B (en) | 2008-03-17 | 2008-03-17 | Flakeboard and method of manufacturing the same |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102152369B (en) * | 2011-01-14 | 2013-04-17 | 福建农林大学 | Production process of tea stem particle board |
| CN102400421B (en) * | 2011-11-10 | 2014-02-19 | 福建农林大学 | Preparation method of tea stalk artware |
| CN102777007A (en) * | 2012-08-22 | 2012-11-14 | 郭漫笳 | Tea dust composite decorative board |
| CN103133851A (en) * | 2013-03-19 | 2013-06-05 | 郭漫笳 | Artificial board with added tea dust and tea polyphenol and manufacturing method thereof |
| CN104942902A (en) * | 2015-06-12 | 2015-09-30 | 柳州市骏马木业有限公司 | Method for manufacturing environment-friendly eucalyptus plywood |
| CN104942900A (en) * | 2015-06-12 | 2015-09-30 | 柳州市骏马木业有限公司 | Method for processing high-performance eucalyptus plywood |
| CN106543759B (en) * | 2016-11-04 | 2019-01-01 | 东莞华南设计创新院 | A kind of low-methoxyl aldehyde bookcase |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1298911A (en) * | 1999-12-06 | 2001-06-13 | 颜科 | Application of tea leaf powder as filler of urea-formaldehyde resin as wood adhesive and formaldehyde-trapping agent |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1298911A (en) * | 1999-12-06 | 2001-06-13 | 颜科 | Application of tea leaf powder as filler of urea-formaldehyde resin as wood adhesive and formaldehyde-trapping agent |
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| 李建章,周文瑞,徐力峥等.茶叶废料在脲醛树脂中的应用研究.生物化学工程41 2.2007,41(2),摘要,第2-3栏. * |
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