CN101214679A - Medium density fiberboard with low burst size of methanal and producing method thereof - Google Patents
Medium density fiberboard with low burst size of methanal and producing method thereof Download PDFInfo
- Publication number
- CN101214679A CN101214679A CNA2007103035021A CN200710303502A CN101214679A CN 101214679 A CN101214679 A CN 101214679A CN A2007103035021 A CNA2007103035021 A CN A2007103035021A CN 200710303502 A CN200710303502 A CN 200710303502A CN 101214679 A CN101214679 A CN 101214679A
- Authority
- CN
- China
- Prior art keywords
- medium density
- grade
- mdf
- fiber
- formaldehyde
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Abstract
The present invention discloses a medium-density fibreboard with low formaldehyde-discharging quantity and a production method thereof. The dosage of E2 grade urea-formaldehyde resin is 165 kg/m<3> to 175 kg/m<3>, and the dosage of high-efficiency formaldehyde trapping glue is 5 percent to 20 percent of the dosage of the E2 grade urea-formaldehyde resin and is mixed with the E2 grade urea-formaldehyde resin with a molar ratio of 1.05 to 1.15 in order to form adhesive, which is then applied into wood fibres. Without changing the hot-pressing and hot-grinding techniques in the production of E2 grade medium-density fibreboards, the applied adhesive dosage of the urea-formaldehyde resin of the E2 grade medium-density fibreboards and the dosage of waterproof agent, the discharging quantity of medium-density fibre formaldehyde can be reduced by 50 percent to 80 percent, thus realizing the standard requirement of environment-friendly E1 grade and E0 grade artificial boards. Compared with the E2 grade medium-density fibreboards produced with the same equipment and production technique, the physical mechanical property of the E1 grade and E0 grade medium-density fibreboards is notably improved, the production cost is low, the product quality is stable, the antiaging property is excellent, and the product quality measures up to and is better than standard high-class products and E1 grade requirements.
Description
Technical field
The present invention relates to a kind of fiberboard and production method thereof, especially a kind of environmental protection E
1/ E
0The medium density fibre board (MDF) and the production method thereof of level low burst size of methanal.
Background technology
In the past, formaldehyde is acknowledged as the possible inducement of cancer, and at present, scientist confirms that formaldehyde can influence Apoptosis by the expression regulation of DNA both at home and abroad, (protein, DNA) causes mechanism such as oxidative damage to large biological molecule, causes the histocyte canceration.At present, the wood-based plate overwhelming majority that China produces adopts Lauxite, and the primary raw material of Lauxite is a formaldehyde, and wood-based plate has free formaldehyde, a harm people's health through still residual in sheet material after the hot pressing.Be the protection health of people, according to the relevant national standard mandatory requirement, the wood-based plate that is directly used in interior decoration must reach GB18580---2001 " formaldehyde discharges and limits the quantity of in indoor decorating material wood-based plate and the goods thereof " E
1The grade standard requirement.E
2The wood-based plate of grade standard must reach E through special disposal
1Just can be applied to interior decoration after the level.There is the expert to propose the free formaldehyde release of wood-based plate is decided to be E less than 5mg/100g in the world
0Level.
Artificial board formaldehyde discharges mainly from 1. unreacted free formaldehyde in the Lauxite; 2. unstable group is emitted formaldehyde again in the resin in hot pressing or sheet material use; 3. hemicellulose also can decompose gradually and emits formaldehyde in the timber.
Many researchs and production all show, reduce the burst size of methanal of wood-based plate, and at present domestic main low mol ratio prescription adhesive by one-component reduces free formaldehyde.As passing through to improve the production and the application technology of urea-formaldehyde glue: the urea fed batch, change molar ratio, adjust temperature, pH value and the making sheet hot pressing condition etc. of reaction.Though reduce in the production of urea-formaldehyde glue formaldehyde/urea (F/U) mol ratio and be effective method, can cause the molecular structure of glue to change; Bonding property is and then descended.And, add the Melamine Production E that improves the sheet material physical property by reducing the Lauxite mol ratio
1Plate, the E that this mode is produced
1Plate and E
2Plate is compared, and production cost increases by 50～65 yuan/m approximately
3The E that uses the ammonia mode of smoking to produce
1Plate is with E
2Plate is compared production cost increases by 30～50 yuan/m approximately
3, but E
1The outward appearance of plate is relatively poor, and the inclined to one side Huang of plank is not attractive in appearance, and ammonia smokes E
1The residual free ammonia of plate causes secondary environmental pollution.
Summary of the invention
At present domestic production E
1/ E
0Technology and cost problem that the level wood-based plate exists, for realize reducing free formaldehyde in artificial plate content and control cost improve and stabilized product quality the two take into account, the present invention proposes and make E
1/ E
0The new method of level environment friendly artificial board.The purpose of this invention is to provide a kind of low cost, steady quality, production technology is simple, with E
2The artificial board formaldehyde burst size of level is reduced to E
1/ E
0The new method of level environment friendly artificial board.
The technical solution used in the present invention is:
Adhesive is made up of Lauxite, highly effective aldehyde catching glue and waterproofing agent, mixes after-applied on wood fibre.
Be realization the object of the invention, above-mentioned medium density fibre board (MDF), in described every cubic metre of semi-finished product fiberboard, highly effective aldehyde catching glue weight is E
25%～20% of grade urea-formaldehyde resin weight, Lauxite weight account for 17%～20% of semi-finished product fiberboard weight, and the weight of moisture content accounts for 4%～11% of semi-finished product fiberboard weight, and the weight of described waterproofing agent accounts for 0.5%～1.2% of semi-finished product fiberboard weight.
For realizing the object of the invention, the used highly effective aldehyde catching glue of above-mentioned medium density fibre board (MDF) is that a kind of formaldehyde and urea mol ratio are 0.3～0.8, not only has the Lauxite cohesive force but also have the stronger low mol ratio adhesive of catching the aldehyde effect.
For realizing the object of the invention, the highly effective aldehyde catching glue capability and performance of above-mentioned medium density fibre board (MDF) is: viscosity: 15～22S (T-4 cup, 25 ℃ of water); Solids content: 60%～75%; PH value: 7.5～8.5; Free formaldehyde: 0.03%～0.10%; Density: 1.05～1.25g/cm
3Presentation quality: milky or translucent, good fluidity; Working life: 10～30 days; The liquid temperature is a normal temperature; Storage period: surpass 16～24 hours.
Be realization the object of the invention, the production method of above-mentioned a kind of medium density fibre board (MDF), its glue-applying technique is: E
2The grade urea-formaldehyde resin consumption is 165～175kg/m
3, the highly effective aldehyde catching glue consumption is E
2The grade urea-formaldehyde resin consumption 5%～20% and with mol ratio 1.05～1.15E
2Grade urea-formaldehyde resin mixes after-applied.Particularly, for realizing this glue-applying technique, need to increase a basin of storing highly effective aldehyde catching glue and aldehyde catching glue and E
2Grade urea-formaldehyde resin mixes mutually joins the glue jar.
1), raw material chips be to realize the object of the invention, the production method of above-mentioned a kind of medium density fibre board (MDF) may further comprise the steps:; 2), sheet-shaped material is screened; 3), raw material preheating is softening; 4), the sheet-shaped material after will softening adds waterproofing agent in the defibrator process grinding chamber body; 5), resolve into fiber through defibrator; 6), add Lauxite, highly effective aldehyde catching glue at defibrator fiber outlet place; 7), fiber is carried out drying; 8) it is standby, dried fiber to be deposited in dried fiber storehouse; 9), to the moulding of mating formation of dried fiber; 10), precompressed, slab saw limit, be delivered to hot press; 11), slab is hot-forming, makes the medium density fiber boards half-finished product; 12), turnover panel cooling and sanction plate edging, stacking; 13) sanding, check grade; 14), the warehouse-in deposit, make E
1/ E
0Level medium density fiber board finished product.
For realizing the object of the invention, the production method of above-mentioned a kind of medium density fibre board (MDF) comprises that also fiber moisture is controlled at 4%～11%; The preformer compression ratio is 55%～65%.
Advantage of the present invention:
The method that the present invention adopts low mol ratio highly effective aldehyde catching glue and Lauxite to mix after dryer sizing is by a certain percentage produced E
1/ E
0The level medium density fibre board (MDF), it is obvious to reduce the artificial board formaldehyde burst size effect.Production technology is simple, is not changing former E substantially
2The level medium density fibre board (MDF) is produced heat pressing process, defibrator process technology, former E
2Under the situation that level medium density fibre board (MDF) Lauxite resin added is constant, the waterproofing agent consumption is constant, can produce environmental protection E fully
1/ E
0The level medium density fibre board (MDF).In addition, with other E
1/ E
0Level medium density fiber plate producing process is compared, product physical and mechanical property of the present invention obviously improves, production cost is lower, constant product quality, ageing-resistant performance is excellent, and product quality meets and be better than GB/T11718-1999 " medium density fibre board (MDF) " standard high-class product and GB18580-2001 " formaldehyde discharges and limits the quantity of in indoor decorating material wood-based plate and the goods thereof " standard E
1The level requirement.By adjusting highly effective aldehyde catching glue and Lauxite ratio and consumption thereof, can make artificial board formaldehyde burst size reduce by 50%～80% in the production process, realize environmental protection E
1Level, E
0Level wood-based plate standard-required.
Description of drawings
Fig. 1 is a production method flow chart of the present invention.
The specific embodiment
Shown in flow chart, the environmental protection E of 12mm, 15mm, 18mm thickness
1/ E
0The level medium density fibre board (MDF), adopt the following step processing:
1, wood material is classified store to handle.The place of depositing should be dry, has drainage condition preferably, answers indispensable complete fire fighting device simultaneously, should grasp during use and use earlier principle first, and the storage time is unsuitable long, and raw material is stored the storage capacity of preparing enough three months maximum productions at least.The raw material moisture content is controlled at 40%～60%.
2, with various wood materials, chip as undersized log, wood machining residues etc.The trees raw material should be whittled into the wood chip of certain specification through mechanical external force, is convenient to conveying and carries out boiling softening.The wood chip size dimension is: long 16～30mm, wide 15～25mm, thick 3～5mm.Otch is smooth, and size evenly.For the wood chip of outsourcing, carry out quality inspection by above chip quality and the moisture requirement of raw material and check on.
3, sheet-shaped material is screened.Excessive wood chip and too small chip are removed.Installation of oil-immersed type tramp iron separator on the belt conveyer is surveyed absorption to the metals such as iron that may exist in the raw material and is handled.
4, to enter pressure be 0.5～1.0MPa through the wood chip of screening, and it is softening that temperature is that 160 ℃～180 ℃ steam buffer feed bin carries out boiling, and digestion time is 2～4 minutes.
5, the wood chip after boiling is softening adds waterproofing agent.Adopt paraffin, will directly add in the feed auger of defibrator after its fusion.Its consumption is 0.5%～1.2% of a semi-finished product fiberboard weight.Wood chip carries out machinery through defibrator and decomposes, and makes fiber.
6, apply adhesive, highly effective aldehyde catching glue at defibrator fiber outlet place.Glue compounding and applying technology is E
2The grade urea-formaldehyde resin consumption is 165～175kg/m
3, the highly effective aldehyde catching glue consumption is E
2The grade urea-formaldehyde resin consumption 5%～20% and with mol ratio 1.05～1.15E
2Grade urea-formaldehyde resin mixes after-applied.Highly effective aldehyde catching glue and Lauxite are evacuated in proportion joins the glue jar mixing of belt stirrer and mixes, and mixes the back and being delivered in the defibrator plasma discharge pipeline by defeated glue pump.The E that is adopted
2The grade urea-formaldehyde resin quality index is: viscosity is 16～18S (being coated with-4 glasss, 20 ℃), and solids content is 50%～52%, and be 50-60S (100 ℃ of water) hardening time, pH=7.8～8.5, and free formaldehyde content is 0.11～0.22%, the storage life is more than 1 month.The highly effective aldehyde catching glue mol ratio that adopts is 0.40～0.45, and its quality index is: viscosity is 15～22S (T-4 cup, 20 ℃), and solids content is 60%～75%, pH=7.5～8.5, and free formaldehyde content is 0.03%～0.08%, density 1.05～1.25g/cm
3, outward appearance is a milky or translucent, good fluidity, 10～30 days working lives.
7, the fiber after the applying glue (highly effective aldehyde catching glue, urea-formaldehyde glue) being carried out drying handles.Fiber moisture is controlled between 4%～11%.The fiber moisture test point is respectively two: one in fiber drying cyclone separator bottom, and one behind spreading machine, before the preformer.Fiber moisture behind the spreading machine detects data bus connection in real time to defibrator process, hot press operation control room, monitors in real time.Dried fiber is delivered to dried fiber feed bin by fire prevention belt conveyer and blast system and stores for future use.
8, with the airflow pavement machine fiber lay down is dressed up type, in the middle of spreading machine guipure and preformer, have a platen base to claim,, guarantee the height of slab and the uniformity of density so that height is put down in adjustment in time according to its weight.Slab is through the preformer precompressed, and compression ratio is controlled to be 55%～65%.Slab cuts long through the mitre saw limit, be delivered to hot press by belt conveyer.
9, slab hot pressing.170～180 ℃ of hot pressing temperatures, hot pressing time are 20～30S/mm, and hot pressing adopts three sections pressurizations, produce and are respectively 17MPa, 4MPa and 12MPa when thickness is the 12mm medium density fibre board (MDF); Produce and be respectively 17MPa, 4MPa and 13MPa when thickness is the 15mm medium density fibre board (MDF); Produce and be respectively 18.5MPa, 4MPa and 15Mpa when thickness is the 18mm medium density fibre board (MDF).
10, through after the hot pressing, the environmental protection E that makes
1/ E
0Level medium density fiber boards half-finished product grades and just makes finished product through turnover panel cooling, sanction plate edging, stacking sanding after 24 hours, check.Above step is identical with the production method of existing medium density fibre board (MDF).
11, finished product is gone into library management.Environmental protection E
1/ E
0Necessary and the E of level medium density fibre board (MDF)
2The level medium density fibre board (MDF) is separately deposited respectively, and special E is set
1/ E
0The level medium density fibre board (MDF) is deposited the warehouse.Forbid and E
2The level medium density fibre board (MDF) mixes to be stacked or the warehouse that coexists.
Through the made environmental protection E of above production and processing
1/ E
0The level medium density fibre board (MDF) detects properties of product by GB/T17657-1999 " wood-based plate and face artificial board physicochemical property experimental technique ", and burst size of methanal detects with perforation method.Assay sees Table 1
Table 1 medium density fibre board (MDF) performance test results
| Thickness of slab | Applying glue (kg/m 3) | Density (kg/m 3) | MOR (MPa) | Expansion rate of water absorption % | Internal bond strength (MPa) | Burst size of methanal mg/100g | E 1\E 0Plate compares E 2Plate additional cost (unit/m 3) | Burst size of methanal reduced rate (%) | |
| Highly effective aldehyde catching glue | Urea-formaldehyde glue | ||||||||
| 12mm E 0Plate | 29.7 | 165 | 720 | 29 | 6.2 | 0.58 | 4.0 | 46 | 73 |
| 12mm E 2Plate | 165 | 732 | 28.7 | 8.7 | 0.55 | 14.8 | |||
| 15mm E 1Plate | 25.5 | 170 | 740 | 31.7 | 4.4 | 1.05 | 7 | 42.5 | 65.6 |
| 15mm E 2Plate | 170 | 752 | 29.5 | 9.7 | 0.79 | 20.4 | |||
| 18mm E 1Plate | 21 | 175 | 760 | 28.6 | 3.5 | 1.19 | 6 | 43 | 71.4 |
| 18mm E 2Plate | 175 | 758 | 27.5 | 9.5 | 0.87 | 21.0 | |||
As can be seen from Table 1, the E that makes of the present invention
1/ E
0The level medium density fibre board (MDF), product physical and mechanical property and E
2The level medium density fibre board (MDF) is compared obvious raising, production cost is lower, constant product quality, product quality meet and are better than GB/T11718-1999 " medium density fibre board (MDF) " standard high-class product and GB18580---2001 " formaldehyde discharges and limits the quantity of in indoor decorating material wood-based plate and the goods thereof " standard E
1The level requirement.Artificial board formaldehyde burst size reduces by 50%～80%, realizes environmental protection E
1Level, E
0Level wood-based plate standard-required.
Embodiment 1:
1. raw material is classified and store to be handled, and moisture content is controlled at 45%～55%.
2. with various wood materials (as undersized log, wood machining residues etc.), trees raw material etc., be whittled into the wood chip of certain specification through mechanical external force, size dimension is: long 16～30mm, wide 15～25mm, thick 3～5mm, otch is smooth, and size is evenly.For the wood chip of outsourcing, carry out quality inspection by the requirement of above chip quality and raw material moisture content and check on.
3. sheet-shaped material is screened.Excessive wood chip and too small chip are removed.Installation of oil-immersed type tramp iron separator on the belt conveyer is surveyed absorption to the metals such as iron that may exist in the raw material and is handled.
4. to enter pressure be 0.7～1.0MPa through the wood chip of screening, and it is softening that temperature is that 172-178 ℃ steam buffer feed bin carries out boiling, and digestion time is 2～3 minutes.
5. adding waterproofing agent paraffin consumption in the wood chip after softening through boiling is 0.83% of semi-finished product fiberboard weight, will add defibrator after its fusion, and timber carries out machinery through defibrator and decomposes, and makes fiber.
6. apply E at defibrator fiber outlet place
2Level adhesive and highly effective aldehyde catching glue.E
2The grade urea-formaldehyde resin consumption is 170kg/m
3, the highly effective aldehyde catching glue consumption is 25.5kg/m
3, promptly the highly effective aldehyde catching glue consumption is E
2Grade urea-formaldehyde resin is with 15% of weight.Highly effective aldehyde catching glue and E
2The mixing that Lauxite is evacuated to belt stirrer is in proportion joined the glue jar and is mixed, and mixes the back and being delivered in the defibrator plasma discharge pipeline by defeated glue pump.The E that is adopted
2The grade urea-formaldehyde resin mol ratio is 1.12, and its quality index is: viscosity is 16～18S (being coated with-4 glasss, 20 ℃), solids content is 50～52%, and be 50-60S (100 ℃ of water) hardening time, pH=7.8～8.1, free formaldehyde content is 0.22%, and the storage life is more than 1 month.The highly effective aldehyde catching glue mol ratio that adopts is 0.45, and quality index is: viscosity is 15～22S (being coated with-4 glasss, 20 ℃ of water), and solids content is 60%～75%, pH=7.5～8.5, and free formaldehyde content is 0.05%～0.08%, density 1.05～1.25g/cm
3, outward appearance is a milky or translucent, good fluidity, 10～30 days working lives.
7. the fiber after the applying glue (highly effective aldehyde catching glue, urea-formaldehyde glue) being carried out drying handles.Fiber moisture is controlled between 6.5～8.8%.Dried fiber is delivered to dried fiber feed bin by fire prevention belt conveyer and blast system and stores for future use.
8. with the airflow pavement machine fiber lay down is dressed up type, guarantee the height of slab and the uniformity of density.Slab is through the preformer precompressed, and compression ratio is controlled to be 55%～58%.Slab cuts long through the mitre saw limit, be delivered to hot press by belt conveyer.
9. slab hot pressing.175 ℃ of hot pressing temperatures, hot pressing time are 20～21S/mm, and hot pressing adopts the pressurization of three stages.Produce thickness and be respectively 17MPa, 4MPa and 13MPa for the 15mm medium density fibre board (MDF).
10. after hot pressing, make environmental protection E
1/ E
0Level medium density fiber boards half-finished product is after turnover panel cools off, cuts out plate edging, stacking sanding after 24 hours, checks to grade and just make production board.Above step is identical with the production method of existing medium density fibre board (MDF).
The production board is gone into library management.Environmental protection E
1/ E
0Necessary and the E of level medium density fibre board (MDF)
2The level medium density fibre board (MDF) is separately deposited respectively, and special E is set
1/ E
0The level medium density fibre board (MDF) is deposited the warehouse.
Product quality sees Table 1.
Embodiment 2:
1. raw material is classified and store to be handled, and moisture content is controlled at 45%～55%.
2. with various wood materials (as undersized log, wood machining residues etc.), trees raw material etc., be whittled into the wood chip of certain specification through mechanical external force, size dimension is: long 16～30mm, wide 15～25mm, thick 3～5mm, otch is smooth, and size is evenly.For the wood chip of outsourcing, carry out quality inspection by the requirement of above chip quality and raw material moisture content and check on.
3. sheet-shaped material is screened.Excessive wood chip and too small chip are removed.Installation of oil-immersed type tramp iron separator on the belt conveyer is surveyed absorption to the metals such as iron that may exist in the raw material and is handled.
4. to enter pressure be 0.8～1.0MPa through the wood chip of screening, and it is softening that temperature is that 174～178 ℃ steam buffer feed bin carries out boiling, and digestion time is 2～3 minutes.
5. adding waterproofing agent paraffin consumption in the wood chip after softening through boiling is 0.72% of semi-finished product fiberboard weight, will add defibrator after its fusion, and timber carries out machinery through defibrator and decomposes, and makes fiber.
6. apply E at defibrator fiber outlet place
2Level adhesive and highly effective aldehyde catching glue.E
2The grade urea-formaldehyde resin consumption is 165kg/m
3, the highly effective aldehyde catching glue consumption is 29.7kg/m
3, promptly the highly effective aldehyde catching glue consumption is E
2Grade urea-formaldehyde resin is with 18% of weight.Highly effective aldehyde catching glue and E
2The mixing that Lauxite is evacuated to belt stirrer is in proportion joined the glue jar and is mixed, and mixes the back and being delivered in the defibrator plasma discharge pipeline by defeated glue pump.The E that is adopted
2The grade urea-formaldehyde resin mol ratio is 1.05, and its quality index is: viscosity is 16～18S (being coated with-4 glasss, 20 ℃), solids content is 50～52%, and be 52-60S (100 ℃ of water) hardening time, pH=7.9～8.3, free formaldehyde content is 0.15%, and the storage life is more than 1 month.The highly effective aldehyde catching glue mol ratio that adopts is 0.40, and quality index is: viscosity is 15～22S (being coated with-4 glasss, 20 ℃ of water), and solids content is 60%～75%, pH=7.5～8.5, and free formaldehyde content is 0.03%～0.07%, density 1.05～1.25g/cm
3, outward appearance is a milky or translucent, good fluidity, 10～30 days working lives.
7. the fiber after the applying glue (highly effective aldehyde catching glue, urea-formaldehyde glue) being carried out drying handles.Fiber moisture is controlled between 7.5～9.0%.Dried fiber is delivered to dried fiber feed bin by fire prevention belt conveyer and blast system and stores for future use.
8. with the airflow pavement machine fiber lay down is dressed up type, guarantee the height of slab and the uniformity of density.Slab is through the preformer precompressed, and compression ratio is controlled to be 57%～62%.Slab cuts long through the mitre saw limit, be delivered to hot press by belt conveyer.
9. slab hot pressing.172～175 ℃ of hot pressing temperatures, hot pressing time are 20～21S/mm, and hot pressing adopts the pressurization of three stages.Produce thickness and be respectively 17MPa, 4MPa and 13MPa for the 12mm medium density fibre board (MDF).
10. after hot pressing, make environmental protection E
1/ E
0Level medium density fiber boards half-finished product is after turnover panel cools off, cuts out plate edging, stacking sanding after 24 hours, checks to grade and just make production board.Above step is identical with the production method of existing medium density fibre board (MDF).
The production board is gone into library management.Environmental protection E
1/ E
0Necessary and the E of level medium density fibre board (MDF)
2The level medium density fibre board (MDF) is separately deposited respectively, and special E is set
1/ E
0The level medium density fibre board (MDF) is deposited the warehouse.
Product quality sees Table 1.
Embodiment 3:
1. raw material is classified and store to be handled, and moisture content is controlled at 45%～55%.
2. with various wood materials (as undersized log, wood machining residues etc.), trees raw material etc., be whittled into the wood chip of certain specification through mechanical external force, size dimension is: long 16～30mm, wide 15～25mm, thick 3～5mm, otch is smooth, and size is evenly.For the wood chip of outsourcing, carry out quality inspection by the requirement of above chip quality and raw material moisture content and check on.
3. sheet-shaped material is screened.Excessive wood chip and too small chip are removed.Installation of oil-immersed type tramp iron separator on the belt conveyer is surveyed absorption to the metals such as iron that may exist in the raw material and is handled.
4. to enter pressure be 0.8～1.0MPa through the wood chip of screening, and it is softening that temperature is that 174～178 ℃ steam buffer feed bin carries out boiling, and digestion time is 2～3 minutes.
5. adding waterproofing agent paraffin consumption in the wood chip after softening through boiling is 0.98% of semi-finished product fiberboard weight, will add defibrator after its fusion, and timber carries out machinery through defibrator and decomposes, and makes fiber.
6. apply E at defibrator fiber outlet place
2Level adhesive and highly effective aldehyde catching glue.E
2The grade urea-formaldehyde resin consumption is 175kg/m
3, the highly effective aldehyde catching glue consumption is 21kg/m
3, promptly the highly effective aldehyde catching glue consumption is E
2Grade urea-formaldehyde resin is with 18% of weight.Highly effective aldehyde catching glue and E
2The mixing that Lauxite is evacuated to belt stirrer is in proportion joined the glue jar and is mixed, and mixes the back and being delivered in the defibrator plasma discharge pipeline by defeated glue pump.The E that is adopted
2The grade urea-formaldehyde resin mol ratio is 1.12, and its quality index is: viscosity is 16～18S (being coated with-4 glasss, 20 ℃), solids content is 50～52%, and be 50-60S (100 ℃ of water) hardening time, pH=7.8～8.3, free formaldehyde content is 0.23%, and the storage life is more than 1 month.The highly effective aldehyde catching glue mol ratio that adopts is 0.40, and quality index is: viscosity is 15～22S (being coated with-4 glasss, 20 ℃ of water), and solids content is 60%～75%, pH=7.5～8.5, and free formaldehyde content is 0.03%～0.07%, density 1.05～1.25g/cm
3, outward appearance is a milky or translucent, good fluidity, 10～30 days working lives.
7. the fiber after the applying glue (highly effective aldehyde catching glue, urea-formaldehyde glue) being carried out drying handles.Fiber moisture is controlled between 8.5～10.5%.Dried fiber is delivered to dried fiber feed bin by fire prevention belt conveyer and blast system and stores for future use.
8. with the airflow pavement machine fiber lay down is dressed up type, guarantee the height of slab and the uniformity of density.Slab is through the preformer precompressed, and compression ratio is controlled to be 52%～58%.Slab cuts long through the mitre saw limit, be delivered to hot press by belt conveyer.
9. slab hot pressing.173～178 ℃ of hot pressing temperatures, hot pressing time are 20～22S/mm, and hot pressing adopts the pressurization of three stages.Produce thickness and be respectively 18.5MPa, 4MPa and 15MPa for the 18mm medium density fibre board (MDF).
10. after hot pressing, make environmental protection E
1/ E
0Level medium density fiber boards half-finished product is after turnover panel cools off, cuts out plate edging, stacking sanding after 24 hours, checks to grade and just make production board.Above step is identical with the production method of existing medium density fibre board (MDF).
The production board is gone into library management.Environmental protection E
1/ E
0Necessary and the E of level medium density fibre board (MDF)
2The level medium density fibre board (MDF) is separately deposited respectively, and special E is set
1/ E
0The level medium density fibre board (MDF) is deposited the warehouse.
Product quality sees Table 1.
Claims (8)
1. the medium density fibre board (MDF) of a low burst size of methanal, it is characterized in that: adhesive is made up of Lauxite, highly effective aldehyde catching glue and waterproofing agent, mixes after-applied on wood fibre.
2. the medium density fibre board (MDF) of low burst size of methanal according to claim 1 is characterized in that: in every cubic metre of semi-finished product fiberboard, adding highly effective aldehyde catching glue weight is E
25%～20% of grade urea-formaldehyde resin weight; Lauxite weight accounts for 17%～20% of semi-finished product fiberboard weight; The weight of moisture content accounts for 4%～11% of semi-finished product fiberboard weight; The weight of waterproofing agent accounts for 0.5%～1.2% of semi-finished product fiberboard weight.
3. according to the medium density fibre board (MDF) of claim 1,2 described low burst size of methanal, it is characterized in that: highly effective aldehyde catching glue is that a kind of formaldehyde and urea mol ratio are 0.3～0.8, not only has the Lauxite cohesive force but also have the stronger low mol ratio adhesive of catching the aldehyde effect.
4. the medium density fibre board (MDF) of low burst size of methanal according to claim 3 is characterized in that: the highly effective aldehyde catching adhesiveness: 15～22S/T-4 cup, 25 ℃ of water; Solids content: 60%～75%; PH value: 7.5～8.5; Free formaldehyde: 0.03%～0.10%; Density: 1.05～1.25g/cm
3Presentation quality: milky or translucent, good fluidity; Working life: 10～30 days.
5. according to the production method of the medium density fibre board (MDF) of claim 1,2 described a kind of low burst size of methanal, comprise following production stage: 1. raw material is chipped; 2. sheet-shaped material is screened; 3. the pre-thermal softening of wood chip; 4. the sheet-shaped material after will softening adds waterproofing agent in the defibrator process grinding chamber body; 5. resolve into fiber through defibrator; 6. add adhesive at defibrator fiber outlet place; 7. fiber is carried out drying; 8. it is standby dried fiber to be deposited in dried fiber storehouse; 9. to the moulding of mating formation of dried fiber; 10. precompressed, slab saw limit are delivered to hot press; The slab is hot-forming, makes the medium density fiber boards half-finished product; Cooling of turnover panel and sanction plate edging, stacking; sanding, check grade; makes the medium density fiber board finished product, it is characterized in that: adhesive has applied highly effective aldehyde catching glue in this production method.
6. according to the production method of the medium density fibre board (MDF) of claim 2,5 described low burst size of methanal, it is characterized in that: E
2The grade urea-formaldehyde resin consumption is 165～175kg/m
3, the highly effective aldehyde catching glue consumption is 5%～20% of an E2 grade urea-formaldehyde resin consumption, and with mol ratio 1.05～1.15E
2Grade urea-formaldehyde resin mixes after-applied.
7. the production method of the medium density fibre board (MDF) of a kind of low burst size of methanal according to claim 5, it is characterized in that: fiber moisture is controlled at 4%～10%; The preformer compression ratio is 55%～65%.
8. according to the medium density fiber plate producing process of the described a kind of low burst size of methanal of claim 1 to 7, it is characterized in that: the medium density fibre board (MDF) product quality of producing meets and is better than GB/T11718-1999 " medium density fibre board (MDF) " standard high-class product and GB18580-2001 " formaldehyde discharges and limits the quantity of in indoor decorating material wood-based plate and the goods thereof " standard E
1The level requirement.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007103035021A CN101214679A (en) | 2007-12-26 | 2007-12-26 | Medium density fiberboard with low burst size of methanal and producing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007103035021A CN101214679A (en) | 2007-12-26 | 2007-12-26 | Medium density fiberboard with low burst size of methanal and producing method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101214679A true CN101214679A (en) | 2008-07-09 |
Family
ID=39621218
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2007103035021A Pending CN101214679A (en) | 2007-12-26 | 2007-12-26 | Medium density fiberboard with low burst size of methanal and producing method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101214679A (en) |
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103753687A (en) * | 2013-12-31 | 2014-04-30 | 广西丰林木业集团股份有限公司 | Manufacturing method of light inflaming retarding fiberboard |
| CN104029273A (en) * | 2014-05-29 | 2014-09-10 | 泗县林星板业有限责任公司 | Method and device for producing compressed plates with medium and high density |
| CN104175382A (en) * | 2014-08-25 | 2014-12-03 | 湖北益嘉林业发展有限公司 | Modified fiber board production process |
| CN104690803A (en) * | 2015-02-14 | 2015-06-10 | 广西丰林木业集团股份有限公司 | Manufacturing method of fiber boards of non-formaldehyde soybean meal |
| CN104690804A (en) * | 2015-02-14 | 2015-06-10 | 广西丰林木业集团股份有限公司 | Manufacturing method for fiberboard with electromagnetic shielding function |
| CN105216086A (en) * | 2015-09-02 | 2016-01-06 | 贵港市伟创木业有限公司 | A kind of production method of low aldehyde medium density fibre board (MDF) |
| CN105599101A (en) * | 2015-12-25 | 2016-05-25 | 广西丰林木业集团股份有限公司 | Method for producing mold-proof function fiberboard |
| CN106182326A (en) * | 2016-08-23 | 2016-12-07 | 辽宁蓝亿实业有限公司 | A kind of light burnt powder makees the environment-friendly type medium-density plate of inserts |
| CN106363764A (en) * | 2016-08-27 | 2017-02-01 | 苏州雅晟建筑装饰工程有限公司 | Preparing method of waterproof fiberboard |
| CN106956347A (en) * | 2017-03-28 | 2017-07-18 | 曾华 | A kind of production method of medium/high density fiber board |
| CN107254809A (en) * | 2017-07-31 | 2017-10-17 | 安徽佳诺威木业有限公司 | A kind of preparation method of environmental and durable medium density fibre board (MDF) |
| CN108000671A (en) * | 2017-11-09 | 2018-05-08 | 大连海洋大学 | A kind of fiberboard prepared using seaweed waste material and preparation method thereof |
| EP3233403A4 (en) * | 2014-12-16 | 2018-08-29 | Shanghai Zhensen Wood-Working Machinery Co., Ltd | Method of manufacturing crop straw fiber board |
| CN109227857A (en) * | 2018-09-30 | 2019-01-18 | 大亚木业（茂名）有限公司 | A kind of manufacturing method of ocean wood fibre board |
| CN112847727A (en) * | 2021-01-05 | 2021-05-28 | 河南省明珠木业有限公司 | Preparation method of moisture-proof and water-resistant fiberboard |
| CN115609721A (en) * | 2022-11-01 | 2023-01-17 | 佳诺威集团股份有限公司 | Low-formaldehyde-emission fiberboard and production method thereof |
-
2007
- 2007-12-26 CN CNA2007103035021A patent/CN101214679A/en active Pending
Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103753687A (en) * | 2013-12-31 | 2014-04-30 | 广西丰林木业集团股份有限公司 | Manufacturing method of light inflaming retarding fiberboard |
| CN104029273A (en) * | 2014-05-29 | 2014-09-10 | 泗县林星板业有限责任公司 | Method and device for producing compressed plates with medium and high density |
| CN104175382A (en) * | 2014-08-25 | 2014-12-03 | 湖北益嘉林业发展有限公司 | Modified fiber board production process |
| CN104175382B (en) * | 2014-08-25 | 2016-02-24 | 湖北益嘉林业发展有限公司 | A kind of production technology of modified fibre sheet material |
| EP3233403A4 (en) * | 2014-12-16 | 2018-08-29 | Shanghai Zhensen Wood-Working Machinery Co., Ltd | Method of manufacturing crop straw fiber board |
| CN104690803A (en) * | 2015-02-14 | 2015-06-10 | 广西丰林木业集团股份有限公司 | Manufacturing method of fiber boards of non-formaldehyde soybean meal |
| CN104690804A (en) * | 2015-02-14 | 2015-06-10 | 广西丰林木业集团股份有限公司 | Manufacturing method for fiberboard with electromagnetic shielding function |
| CN105216086A (en) * | 2015-09-02 | 2016-01-06 | 贵港市伟创木业有限公司 | A kind of production method of low aldehyde medium density fibre board (MDF) |
| CN105599101A (en) * | 2015-12-25 | 2016-05-25 | 广西丰林木业集团股份有限公司 | Method for producing mold-proof function fiberboard |
| CN106182326A (en) * | 2016-08-23 | 2016-12-07 | 辽宁蓝亿实业有限公司 | A kind of light burnt powder makees the environment-friendly type medium-density plate of inserts |
| CN106363764A (en) * | 2016-08-27 | 2017-02-01 | 苏州雅晟建筑装饰工程有限公司 | Preparing method of waterproof fiberboard |
| CN106956347A (en) * | 2017-03-28 | 2017-07-18 | 曾华 | A kind of production method of medium/high density fiber board |
| CN107254809A (en) * | 2017-07-31 | 2017-10-17 | 安徽佳诺威木业有限公司 | A kind of preparation method of environmental and durable medium density fibre board (MDF) |
| CN107254809B (en) * | 2017-07-31 | 2019-08-06 | 安徽佳诺威木业有限公司 | A kind of preparation method of environmental and durable medium density fibre board (MDF) |
| CN108000671A (en) * | 2017-11-09 | 2018-05-08 | 大连海洋大学 | A kind of fiberboard prepared using seaweed waste material and preparation method thereof |
| CN109227857A (en) * | 2018-09-30 | 2019-01-18 | 大亚木业（茂名）有限公司 | A kind of manufacturing method of ocean wood fibre board |
| CN112847727A (en) * | 2021-01-05 | 2021-05-28 | 河南省明珠木业有限公司 | Preparation method of moisture-proof and water-resistant fiberboard |
| CN115609721A (en) * | 2022-11-01 | 2023-01-17 | 佳诺威集团股份有限公司 | Low-formaldehyde-emission fiberboard and production method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101214679A (en) | Medium density fiberboard with low burst size of methanal and producing method thereof | |
| CN106363714B (en) | The method that environmentally friendly particieboard is produced using full Eucalyptus leftover pieces continuous hot-press | |
| CN110281341B (en) | Formaldehyde-free medium-high density board capable of deeply decorating surface and manufacturing method thereof | |
| CN103878859B (en) | The preparation method of the slim medium density fibre board (MDF) of a kind of high protection against the tide | |
| CN103317585B (en) | Environmental-friendly ecological plant fibreboard and shaving board and manufacture method thereof | |
| CN102794809B (en) | Production technology of environment-friendly medium-density fiberboard | |
| CN107627695B (en) | Modified PCB resin fibre and the compound oriented shaving essence panel of wood shavings and preparation method thereof | |
| CN103753687A (en) | Manufacturing method of light inflaming retarding fiberboard | |
| CN106182328A (en) | Twice sieve method removes the method that the bark in full Eucalyptus leftover pieces produces particieboard | |
| CN104175382B (en) | A kind of production technology of modified fibre sheet material | |
| CN102729311A (en) | Production method of eucalyptus bark shaving boards | |
| CN102172948A (en) | Surface infiltrated wood fiber board and production method thereof | |
| CN109623980A (en) | It can the full bamboo of facing or bamboo and wood compound-voltage blocking and its manufacturing method without aldehyde | |
| CN105690538A (en) | Manufacturing method for environment-friendly inflaming retarding medium density fiberboard for laminate wood flooring | |
| CN105291242A (en) | Environment-friendly bamboo-wood composite shaving board with low hygroscopic expansion rate | |
| CN112743645A (en) | Faced waffle slab and preparation process thereof | |
| CN104946181A (en) | Preparation methods and application of low mole ratio UF resin adhesive and high mole ratio MUF resin adhesive | |
| EP0092298B1 (en) | Method for the production of a composite material | |
| EP3771538A1 (en) | Fire-proof wooden pressure board and the production method thereof | |
| RU2755311C1 (en) | Method for manufacturing wood-fiber panel | |
| US10953568B2 (en) | Method for producing MDF boards with NFC/MFC | |
| CN113942245A (en) | Manufacturing process of rock wool fiberboard | |
| CN107009477A (en) | A kind of production method without aldehyde light flame-retardant fiberboard | |
| CN106426497A (en) | Fiber plate and manufacturing method thereof | |
| CN1195611C (en) | Reiforced wood floor base material and its preparation method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20080709 |