CN107972155A - A kind of medium density fibre board (MDF) powdery paints electrostatic painting method - Google Patents
A kind of medium density fibre board (MDF) powdery paints electrostatic painting method Download PDFInfo
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- CN107972155A CN107972155A CN201711261879.5A CN201711261879A CN107972155A CN 107972155 A CN107972155 A CN 107972155A CN 201711261879 A CN201711261879 A CN 201711261879A CN 107972155 A CN107972155 A CN 107972155A
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- medium density
- mdf
- fibre board
- density fibre
- powdery paints
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27N—MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
- B27N3/00—Manufacture of substantially flat articles, e.g. boards, from particles or fibres
- B27N3/04—Manufacture of substantially flat articles, e.g. boards, from particles or fibres from fibres
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27N—MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
- B27N3/00—Manufacture of substantially flat articles, e.g. boards, from particles or fibres
- B27N3/08—Moulding or pressing
- B27N3/18—Auxiliary operations, e.g. preheating, humidifying, cutting-off
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Wood Science & Technology (AREA)
- Forests & Forestry (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
- Dry Formation Of Fiberboard And The Like (AREA)
Abstract
The present invention relates to a kind of medium density fibre board (MDF) powdery paints electrostatic painting method.Its technical solution is：Medium density fiber plate after cutting is carried out to roughly grind and refine step by step, is blown off surface powder with compressed air, then is placed in infrared heater, 1~2min, the medium density fibre board (MDF) after being preheated are preheated under the conditions of 80~120 DEG C.Using electrostatic dusting method, levelling powdery paints is equably sprayed on the medium density fiber plate surface after the preheating, the powder coating thickness after spraying is 100~200 μm, obtains the medium density fibre board (MDF) after electrostatic dusting.Medium density fibre board (MDF) after the electrostatic dusting is inserted in infrared heater, 5~10min of melting and solidification under the conditions of 140~170 DEG C, obtains the medium density fibre board (MDF) after powdery paints electrostatic spraying.Present invention process is simple, suitable for industrialized production and environment friendly and pollution-free；Products obtained therefrom powder coating is smooth, coating adhesion is strong, chemical resistance is good and water resistance is excellent.
Description
Technical field
The invention belongs to Technologies of Medium Density Fiberboard field.More particularly to a kind of medium density fibre board (MDF) powdery paints electrostatic coat
Dress method.
Background technology
Medium density fibre board (MDF) (medium density fireboard, MDF) is with wood fibre or other plant fiber
For raw material, through smashing, fiber separation, dry after-applied synthetic resin, nominal density scope is pressed into the case where heating pressurized conditions
For 0.65~0.80g/cm3Plate.Medium density fibre board (MDF) fibr tissue is uniform, and interfibrous bonding strength is high, has excellent
Physical and mechanical property, decoration performance and processing performance etc., medium density fibre board (MDF) is widely used in office furniture, kitchen cabinet, shelf
And the field such as common wealth furniture.But medium density fibre board (MDF) plate face is coarse, shade deviation, without the native texture of timber, both unsightly,
It is not wear-resisting and easy to moisture absorption, it is necessary to by incrustation handle can use.MDF incrustations mainly take spray painting or overlay film at present
Two kinds of techniques, but there are glue to contain a large amount of toxic volatile organic matters (VOC), edge for overlay film (predominantly PVC or paper) technique
Easily tilt, the problems such as quality is unstable, low production efficiency, and there is paint containing a large amount of toxic solvents, application in lacquer spraying technique
Often, the working environment difference problem such as low with efficiency.Powdery paints is free of organic solvent, does not have the volatility organic substantially to environment
Thing (VOC) discharges, and belongs to green product, the application on the thermo-sensitive material such as timber surface is always the important research of powdery paints
One of with application direction.
Powdery paints is due to melting viscosity is low, good leveling property, excellent physical properties, electrical insulation capability are good, chemically-resistant
The advantages that product corrode, is widely used in the fields such as anti-corrosion, insulation.But powdery paints either thermoplasticity or thermosetting property, its into
Film temperature is very high, and existing powder coating solidification technique more than 180 DEG C and need to generally toast 10~20 minutes, make its application only
The resistant substrates such as metal are confined to, MDF plates of heatsensitive substrates etc. can not be applied to.With going out for low temperature cured powder coating
It is existing, particularly there is solidification temperature for 140~170 DEG C, the powdery paints of hardening time about 5min or so, not only can be real
The existing rapid curing of epoxide powder coating at low temperature, and the coating of any gloss can also be obtained, so that powdery paints should
For heatsensitive substrates such as MDF plates, plastics, plank, cardboard, paper and make it possible that the gloss of coating controls, have good
Application and Industry Development Prospect.
Medium density fibre board (MDF) is related to series technique problem using powder coating and their application, is mainly concerned with medium density fibre board (MDF)
Pre-treating technology problem, powdery paints coating problem, the melting and solidification problem of powdery paints and medium density fibre board (MDF) heating
Long-time service problem of Cracking afterwards.The pre-treating technology problem of medium density fibre board (MDF) and powdery paints coating problem have solved at present
Certainly, but the melting and solidification of powdery paints has an impact medium density fibre board (MDF) long-time service cracking, causes serious quality to be asked
Topic, is one of key technical problem that medium density fibre board (MDF) powder coating and their application needs solve.
Medium density fibre board (MDF) Short Time Heating will crack to more than 80 DEG C, to solve medium density fibre board (MDF) Short Time Heating or powder
Last coating cracking problem, those skilled in the art give very big concern.Such as " medium density fiberboard powder coating process "
(CN201410851007.4) patented technology, though the technology using water-base resin back cover, after filling up medium density fibre board (MDF) heating
The crackle of formation, but the unsaturated polyester resin contained in water-base resin irritant smell containing styrene, Long Term Contact is to body
Body health is unfavorable." medium density fibre board (MDF) application timber " (CN201310257259.X), the patented technology is by dispensing, sand milling, pre-
Heat, applying medium material, first application, overcoating dress and spray painting, totally seven big steps are completed, complicated, are unfavorable for large-scale production processing.
" one kind is used for MDF wood grains powder " (CN201510041543.2), the patented technology disclose a kind of low temperature extinction powder coating,
Product uses polyester as resin, and high levelling polyester powder is prepared as curing agent using epoxy powder, triglycidyl isocyanurate
Coating, is not suitable for forming the low flat low-temperature setting powder coating of light stream in medium density fibre board (MDF).
In conclusion there are the following problems for the prior art：(1) there is no industrial production practical application；(2) rib in process
Side is cracked；(3) product uses polyester resin, is prepared using epoxy powder, triglycidyl isocyanurate as curing agent high
Levelling polyester powder coating, it is difficult to form the low flat low-temperature setting powder coating of light stream in medium density fibre board (MDF).
The content of the invention
It is contemplated that overcome prior art defect, and it is an object of the present invention to provide a kind of technique it is simple, suitable for industrialized production, apply
Environment friendly and pollution-free medium density fibre board (MDF) powdery paints electrostatic painting method during dress, with the medium density fiber of this method application
Plate is smooth, coating adhesion is strong, chemical resistance is good and water resistance is excellent.
To achieve the above object, the technical solution adopted by the present invention comprises the concrete steps that：
Step 1: surface treatment
Medium density fiber plate after cutting is carried out to roughly grind and refine step by step, then is blown surface powder with compressed air
Only, the medium density fibre board (MDF) after being surface-treated.
Step 2: the pre-heat treatment
Medium density fibre board (MDF) after the surface treatment is placed in infrared heater, it is pre- under the conditions of 80~120 DEG C
1~2min of heat, the medium density fibre board (MDF) after being preheated.
Step 3: electrostatic dusting
Using electrostatic dusting method, levelling powdery paints is equably sprayed on to the medium density fibre board (MDF) table after the preheating
Face, the powder coating thickness after spraying is 100~200 μm, obtains the medium density fibre board (MDF) after electrostatic dusting.
Step 4: melting and curing
Medium density fibre board (MDF) after the electrostatic dusting is inserted in infrared heater, is melted under the conditions of 140~170 DEG C
Melt 5~10min of curing, obtain the medium density fibre board (MDF) after powdery paints electrostatic spraying.
The medium density fibre board (MDF) density is 0.75~0.80g/cm3, the thickness of medium density fibre board (MDF) is 10~25mm, in
The moisture content of density fiber board is 6-8%.
The infrared heater wavelength is 10~90 μm.
Due to the adoption of the above technical scheme, the present invention has following good effect compared with prior art：
The present invention is on the basis of surface treatment, preheated processing, electrostatic dusting, melting and curing, therefore application work
Skill is simple, be adapted to pipelining, also can small lot production, suitable for industrialized production.The solid powder used in the present invention applies
Material is without harmful substances such as benzene, so environment friendly and pollution-free in coating process, no pernicious gas is released.
The present invention to after powdery paints electrostatic spraying medium density fibre board (MDF) carry out appearance, coating adhesion, coating hardness,
Water resistance, chemical resistance test, it was demonstrated that the powder coating of the medium density fibre board (MDF) after processing is smooth, and coating is attached
Put forth effort to reach 0 grade, chemical resistance and water resistance are excellent.
Therefore, present invention process is simple, and environment friendly and pollution-free in coating process suitable for industrialized production, no pernicious gas is put
Go out；Medium density fibre board (MDF) powder coating after electrostatic spraying has that smooth, coating adhesion is strong, chemical resistance is good
With water resistance it is excellent the characteristics of.
Embodiment
With reference to embodiment, the invention will be further described, not to the restriction of its protection domain.
In described in present embodiment：
Medium density fibre board (MDF) density is 0.75~0.80g/cm3, the thickness of medium density fibre board (MDF) is 10~25mm, Midst density
The moisture content of fiberboard is 6-8%；
The infrared heater wavelength is 10~90 μm.
Repeated no more in embodiment.
Embodiment 1
A kind of medium density fibre board (MDF) powdery paints electrostatic painting method.The step of the present embodiment the method is：
Step 1: surface treatment
Medium density fiber plate after cutting is carried out to roughly grind and refine step by step, then is blown surface powder with compressed air
Only, the medium density fibre board (MDF) after being surface-treated.
Step 2: the pre-heat treatment
Medium density fibre board (MDF) after the surface treatment is placed in infrared heater, it is pre- under the conditions of 80~100 DEG C
1~2min of heat, the medium density fibre board (MDF) after being preheated.
Step 3: electrostatic dusting
Using electrostatic dusting method, levelling powdery paints is equably sprayed on to the medium density fibre board (MDF) table after the preheating
Face, the powder coating thickness after spraying is 100~160 μm, obtains the medium density fibre board (MDF) after electrostatic dusting.
Step 4: melting and curing
Medium density fibre board (MDF) after the electrostatic dusting is inserted in infrared heater, is melted under the conditions of 140~150 DEG C
Melt 5~10min of curing, obtain the medium density fibre board (MDF) after powdery paints electrostatic spraying.
The present embodiment is detected the medium density fibre board (MDF) after powdery paints electrostatic spraying：Coating is smooth；Coating
Adhesive force reaches 0 grade；Coating hardness is 1H or is 2H；Chemical resistance and water resistance are excellent.
Embodiment 2
A kind of medium density fibre board (MDF) powdery paints electrostatic painting method.The step of the present embodiment the method is：
Step 1: surface treatment
Medium density fiber plate after cutting is carried out to roughly grind and refine step by step, then is blown surface powder with compressed air
Only, the medium density fibre board (MDF) after being surface-treated.
Step 2: the pre-heat treatment
Medium density fibre board (MDF) after the surface treatment is placed in infrared heater, it is pre- under the conditions of 85~105 DEG C
1~2min of heat, the medium density fibre board (MDF) after being preheated.
Step 3: electrostatic dusting
Using electrostatic dusting method, levelling powdery paints is equably sprayed on to the medium density fibre board (MDF) table after the preheating
Face, the powder coating thickness after spraying is 110~170 μm, obtains the medium density fibre board (MDF) after electrostatic dusting.
Step 4: melting and curing
Medium density fibre board (MDF) after the electrostatic dusting is inserted in infrared heater, is melted under the conditions of 145~155 DEG C
Melt 5~10min of curing, obtain the medium density fibre board (MDF) after powdery paints electrostatic spraying.
The present embodiment is detected the medium density fibre board (MDF) after powdery paints electrostatic spraying：Coating is smooth；Coating
Adhesive force reaches 0 grade；Coating hardness is 1H or is 2H；Chemical resistance and water resistance are excellent.
Embodiment 3
A kind of medium density fibre board (MDF) powdery paints electrostatic painting method.The step of the present embodiment the method is：
Step 1: surface treatment
Medium density fiber plate after cutting is carried out to roughly grind and refine step by step；Surface powder is blown with compressed air again
Only, the medium density fibre board (MDF) after being surface-treated.
Step 2: the pre-heat treatment
Medium density fibre board (MDF) after the surface treatment is placed in infrared heater, it is pre- under the conditions of 90~110 DEG C
1~2min of heat, the medium density fibre board (MDF) after being preheated.
Step 3: electrostatic dusting
Using electrostatic dusting method, levelling powdery paints is equably sprayed on to the medium density fibre board (MDF) table after the preheating
Face, the powder coating thickness after spraying is 120~180 μm, obtains the medium density fibre board (MDF) after electrostatic dusting.
Step 4: melting and curing
Medium density fibre board (MDF) after the electrostatic dusting is inserted in infrared heater, is melted under the conditions of 150~160 DEG C
Melt 5~10min of curing, obtain the medium density fibre board (MDF) after powdery paints electrostatic spraying.
The present embodiment is detected the medium density fibre board (MDF) after powdery paints electrostatic spraying：Coating is smooth；Coating
Adhesive force reaches 0 grade；Coating hardness is 1H or is 2H；Chemical resistance and water resistance are excellent.
Embodiment 4
A kind of medium density fibre board (MDF) powdery paints electrostatic painting method.The step of the present embodiment the method is：
Step 1: surface treatment
Medium density fiber plate after cutting is carried out to roughly grind and refine step by step；Surface powder is blown with compressed air again
Only, the medium density fibre board (MDF) after being surface-treated.
Step 2: the pre-heat treatment
Medium density fibre board (MDF) after the surface treatment is placed in infrared heater, it is pre- under the conditions of 95~115 DEG C
1~2min of heat, the medium density fibre board (MDF) after being preheated.
Step 3: electrostatic dusting
Using electrostatic dusting method, levelling powdery paints is equably sprayed on to the medium density fibre board (MDF) table after the preheating
Face, the powder coating thickness after spraying is 130~190 μm, obtains the medium density fibre board (MDF) after electrostatic dusting.
Step 4: melting and curing
Medium density fibre board (MDF) after the electrostatic dusting is inserted in infrared heater, is melted under the conditions of 155~165 DEG C
Melt 5~10min of curing, obtain the medium density fibre board (MDF) after powdery paints electrostatic spraying.
The present embodiment is detected the medium density fibre board (MDF) after powdery paints electrostatic spraying：Coating is smooth；Coating
Adhesive force reaches 0 grade；Coating hardness is 1H or is 2H；Chemical resistance and water resistance are excellent.
Embodiment 5
A kind of medium density fibre board (MDF) powdery paints electrostatic painting method.The step of the present embodiment the method is：
Step 1: surface treatment
Medium density fiber plate after cutting is carried out to roughly grind and refine step by step, then is blown surface powder with compressed air
Only, the medium density fibre board (MDF) after being surface-treated.
Step 2: the pre-heat treatment
Medium density fibre board (MDF) after the surface treatment is placed in infrared heater, it is pre- under the conditions of 100~120 DEG C
1~2min of heat, the medium density fibre board (MDF) after being preheated.
Step 3: electrostatic dusting
Using electrostatic dusting method, levelling powdery paints is equably sprayed on to the medium density fibre board (MDF) table after the preheating
Face, the powder coating thickness after spraying is 140~200 μm, obtains the medium density fibre board (MDF) after electrostatic dusting.
Step 4: melting and curing
Medium density fibre board (MDF) after the electrostatic dusting is inserted in infrared heater, is melted under the conditions of 160~170 DEG C
Melt 5~10min of curing, obtain the medium density fibre board (MDF) after powdery paints electrostatic spraying.
The present embodiment is detected the medium density fibre board (MDF) after powdery paints electrostatic spraying：Coating is smooth；Coating
Adhesive force reaches 0 grade；Coating hardness is 1H or is 2H；Chemical resistance and water resistance are excellent.
Present embodiment has following good effect compared with prior art：
Present embodiment is on the basis of surface treatment, preheated processing, electrostatic dusting, melting and curing,
Therefore coating process is simple, be adapted to pipelining, also can small lot production, suitable for industrialized production.In present embodiment
The solid powder paint of use is without harmful substances such as benzene, so environment friendly and pollution-free in coating process, no pernicious gas is released.
Present embodiment to after powdery paints electrostatic spraying medium density fibre board (MDF) carry out appearance, coating adhesion,
Coating hardness, water resistance, chemical resistance test, it was demonstrated that the powder coating of the medium density fibre board (MDF) after processing is smooth flat
Whole, coating adhesion reaches 0 grade, and chemical resistance and water resistance are excellent.
Therefore, present embodiment technique is simple, environment friendly and pollution-free in coating process suitable for industrialized production, and nothing has
Evil gas is released；Medium density fibre board (MDF) powder coating after electrostatic spraying has that smooth, coating adhesion is strong, chemically-resistant medicine
The characteristics of moral character can be got well and water resistance is excellent.
Claims (3)
- A kind of 1. medium density fibre board (MDF) powdery paints electrostatic painting method, it is characterised in that：Step 1: surface treatmentMedium density fiber plate after cutting is carried out to roughly grind and refine step by step, then is blown off surface powder with compressed air, is obtained Medium density fibre board (MDF) after to surface treatment；Step 2: the pre-heat treatmentMedium density fibre board (MDF) after the surface treatment is placed in infrared heater, under the conditions of 80~120 DEG C preheat 1~ 2min, the medium density fibre board (MDF) after being preheated；Step 3: electrostatic dustingUsing electrostatic dusting method, levelling powdery paints is equably sprayed on the medium density fiber plate surface after the preheating, Powder coating thickness after spraying is 100~200 μm, obtains the medium density fibre board (MDF) after electrostatic dusting；Step 4: melting and curingMedium density fibre board (MDF) after the electrostatic dusting is inserted in infrared heater, is melted under the conditions of 140~170 DEG C solid Change 5~10min, obtain the medium density fibre board (MDF) after powdery paints electrostatic spraying.
- 2. medium density fibre board (MDF) powdery paints electrostatic painting method according to claim 1, it is characterised in that close in described It is 0.75~0.80g/cm to spend fiberboard density3, the thickness of medium density fibre board (MDF) is 10~25mm, medium density fibre board (MDF) it is aqueous Rate is 6-8%.
- 3. medium density fibre board (MDF) powdery paints electrostatic painting method according to claim 1, it is characterised in that described infrared Line heater wavelength is 10~90 μm.
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| CN201711261879.5A CN107972155B (en) | 2017-12-04 | 2017-12-04 | Electrostatic coating method for powder coating of medium-density fiberboard |
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| CN201711261879.5A CN107972155B (en) | 2017-12-04 | 2017-12-04 | Electrostatic coating method for powder coating of medium-density fiberboard |
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| CN109016046A (en) * | 2018-08-09 | 2018-12-18 | 东易日盛智能家居科技有限公司 | A kind of furniture processing MDF board processing method |
| CN110496753A (en) * | 2019-09-18 | 2019-11-26 | 粉饰科技(广东)有限公司 | A kind of substrate surface coating process, processing method and composite material |
| CN114653561A (en) * | 2022-03-23 | 2022-06-24 | 江苏无锡欧派集成家居有限公司 | Powder coating method for wood base material |
| CN115157406A (en) * | 2022-07-21 | 2022-10-11 | 大亚人造板集团有限公司 | E 0 Method for manufacturing fiberboard for electrostatic spraying process |
| CN116871136A (en) * | 2023-08-14 | 2023-10-13 | 阜阳大可新材料股份有限公司 | Production method for coating high-density fiberboard with powder coating |
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| CN116871136A (en) * | 2023-08-14 | 2023-10-13 | 阜阳大可新材料股份有限公司 | Production method for coating high-density fiberboard with powder coating |
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| Publication number | Publication date |
|---|---|
| CN107972155B (en) | 2020-09-08 |
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