CN102553793B - Treatment process for preventing medium density fiberboard from bubbling and cracking - Google Patents
Treatment process for preventing medium density fiberboard from bubbling and cracking Download PDFInfo
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- CN102553793B CN102553793B CN 201210011691 CN201210011691A CN102553793B CN 102553793 B CN102553793 B CN 102553793B CN 201210011691 CN201210011691 CN 201210011691 CN 201210011691 A CN201210011691 A CN 201210011691A CN 102553793 B CN102553793 B CN 102553793B
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Abstract
The invention relates to a surface treatment process of wood material, which solves the problems that as the medium density fiberboard is stored in a humidity space for a long time and then water permeates to the board surface, a side part cracks and the bubble is produced on the surface so as to influence the quality, wherein the invention provides a treatment process for preventing a medium density fiberboard from bubbling and cracking; on the base of the existing powder blowing process of the medium density fiberboard, the medium density fiberboard is treated by the following steps: (1), using the epoxy resin to fill and seal edges of the medium density fiberboard with water containing rate of 11-12%, so as to lock water; (2), instantly heating the medium density fiberboard for 1-6 minunder the action of infrared rays; raising the surface temperature to be 30-80 DEG C, blowing powder in the prior art; (3), directly putting the medium intensity fiberboard to a curing furnace at 130-140 DEG C; after 8-20 min, discharging the medium intensity fiberboard from the furnace, cooling the medium intensity fiberboard at normal temperature. The surface of the treated medium intensity fiberboard is difficult to produce bubbles and the edge part does not crack.
Description
Technical field
The present invention relates to the wood surface treatment process, relate in particular to the treatment process that a kind of MDF prevents bubble and be full of cracks.
Background technology
The MDF technology (Powder Coating on MDF) of dusting, be derived from electrostatic powder spraying of metal technology, omnidistance dry powder spraying (not containing solvent), under the effect of electrostatic field, directly be sprayed into charged powder particle on the MDF of high temperature preheating conduction through high-pressure spray gun, by static it evenly is adsorbed on the surface, is solidified to form the coating of superior performance through levelling.Remaining powder siphons away by blower fan, and directly recycling reduces the wastage, and improves former material utilization rate, fast, environmental protection, nothing waste, pollution-free.Surface coating is a kind of solid powdery coating.Mixed by resin and other natural promoter, do not contain any organic solvent, heavy metal and other harmful substances.The surface spray coating process of health environment-friendly, the material of safety, make the release that in spraying process and use, does not have escaping gas and toxic and harmful, disposable spray finishing and seamless characteristic have further been pinned remaining formaldehyde gas in the MDF, real is nonpoisonous and tasteless, can effectively keep IAQ.The MDF rich color that dusts, surface effect is various, and inferior light, Gao Guang, Shamian Island, line, wood grain etc. the effect of hanging down are widely used.
The present MDF surface technology of dusting, though can satisfy the surface-treated requirement better, in the traditional handicraft process MDF often because of long storage time in the bigger space of humidity, the MDF water imbibition can cause moisture penetration entering plate face by force, and then causes the appearance be full of cracks of limit portion, surface to produce bubble and influence quality.
Chinese patent CN101289920A discloses a kind of method for waterproofing of high density MDF; this invention is used in its base material upper and lower surface and has applied one deck melamine base material; corner brushing edge sealing water makes its surface increase one deck waterproofing protection film, fills and leads up pore with the atom ash; then spray priming paint; the baking back is is then filled and led up with red ash, subsequently spray paint if still have pore again; baking again, the technical scheme of polishing at last, polishing.But this method is the further processing after MDF dusts, and belongs to after-treatment, has prolonged the processing time virtually.
Summary of the invention
In the bigger space of humidity, have moisture penetration entering plate face for solving MDF because of long storage time, and then cause limit portion to occur that be full of cracks, surface produce bubble and the problem that influences quality, the present invention proposes the treatment process that a kind of MDF prevents bubble and be full of cracks, MDF after treatment, the surface is difficult for producing bubble, be full of cracks can not appear in the marginal portion, has saved the time simultaneously.
The present invention is achieved by the following technical solutions: a kind of MDF prevents the treatment process of bubble and be full of cracks, comprises the MDF powder injection process of prior art, and on existing MDF powder injection process basis, MDF carries out following treatment step:
(1) elder generation carries out the filling in slit all around with the MDF of moisture content 11% ~ 12% with epoxy resin, and this is in order to pin the moisture turnover; As preferably, epoxy resin is selected epoxy powder for use, and the powder particle size is at 35 ~ 40 microns, easy like this make epoxy resin powder and MDF fully in conjunction with and solidify.Common MDF absorbs airborne moisture easily, so the present invention's control is low excessively as moisture content at 11 ~ 12% moisture content, is easy to generate the thick or be full of cracks in surface; Too high as moisture content, owing to accumulate water vapor pressure in the plate, layering, bubbling take place easily then.Fill the MDF slit of lumber fibre all around with epoxy powder, pinned the moisture of MDF like this, also stoped airborne moisture to enter simultaneously, make MDF keep a stable moisture content, and be not subjected to the influence of extraneous humidity.
(2) again with MDF the infrared ray effect under heated 1 ~ 6 minute, surface temperature is increased to 30 ~ 80 ℃, carries out MDF and dusts.As preferably, MDF was heated 3 ~ 4 minutes under 8 ~ 10 kilowatts infrared ray effect, surface temperature is increased to 50 ~ 60 ℃, carries out MDF and dusts; This temperature has guaranteed that the internal moisture of MDF is difficult for losing.MDF dusts and is derived from electrostatic powder spraying of metal technology, and MDF is by high temperature preheating, make MDF become electric conductor after, directly enter the electrostatic dusting production line, by static powder directly evenly is adsorbed on the MDF surface.Remaining powder siphons away by blower fan, directly recycling, and the sheet material that sprayed directly enters heating cabinet and solidifies.
(3) MDF after dusting directly enters temperature in 130 ~ 140 ℃ curing oven, normal temperature cooling after coming out of the stove in 8 ~ 20 minutes.As preferably, curing oven is selected from infrared curing stove or thermal cycle curing oven; As most preferably, the MDF after dusting is at 130 ~ 140 ℃, solidifies through 6 ~ 8 minutes infrared curing stove earlier, solidifies the back normal temperature cooling of coming out of the stove through 8 ~ 10 minutes thermal cycle curing oven again.Infrared curing can be fast and is evenly melted powder, slowly permeates with thermal cycle before not solidifying fully, makes the abundant accurate combination of powder and MDF, guarantee that MDF has plasticity, be difficult for simultaneously chapping, ductility is better, and crackle appears in the too high MDF that causes easily of temperature.
Through the MDF after the present invention's processing, because having pinned the moisture of MDF inside, heating-up temperature does not allow the water loss of plank own simultaneously, the purpose that do not occur chapping to reach limit portion, bubble does not appear in the surface, simultaneously treated technology and MDF spraying are together carried out, and have saved the time.
Compared with prior art, the invention has the beneficial effects as follows: the MDF after handling through the present invention, the surface is difficult for producing bubble, be full of cracks can not appear in the marginal portion, has saved the time simultaneously.
The specific embodiment
Be described in further detail below by the present invention of embodiment, raw materials usedly be commercial product.
Embodiment 1
Earlier the MDF of moisture content 12% is filled the fiber slit around the MDF with the epoxy powder of Interpon woodcote T brand, pin the moisture turnover; Again MDF was heated 3 minutes under 8 kilowatts infrared ray effect, make surface temperature be increased to 50 ℃, carry out MDF again and dust; MDF after dusting solidifies at 135 ℃ infrared curing stove through 6 minutes, temperature earlier, solidifies the back normal temperature cooling of coming out of the stove through 10 minutes thermal cycle curing oven again.
Embodiment 2
Earlier the MDF of moisture content 11% is filled with the fiber slit around the fine plate of the epoxy resin powder powder material centering of Interpon woodcote T brand, pin the moisture turnover; Again MDF was heated 4 minutes under 10 kilowatts infrared ray effect, make surface temperature be increased to 60 ℃, carry out MDF again and dust; MDF after dusting solidifies at 140 ℃ infrared curing stove through 8 minutes, temperature earlier, solidifies the back normal temperature cooling of coming out of the stove through 8 minutes thermal cycle curing oven again.
Embodiment 3
Earlier the MDF of moisture content 12% is filled the fiber slit around the MDF with the epoxy powder of Interpon woodcote T brand, pin the moisture turnover; Again MDF was heated 6 minutes under 9 kilowatts infrared ray effect, make surface temperature be increased to 30 ℃, carry out MDF again and dust; MDF after dusting solidifies at 130 ℃ infrared curing stove through 7 minutes, temperature earlier, solidifies the back normal temperature cooling of coming out of the stove through 9 minutes thermal cycle curing oven again.
It is in 80 ~ 90% the space after 30 days that embodiment 1, embodiment 2 and embodiment 3 MDF after the present invention handles is placed into humidity, observe the edge sealing part of finding MDF and be full of cracks do not occur, bubble does not appear in surface portion yet, and the quality of MDF is not affected.
Claims (3)
1. a MDF prevents the treatment process of bubble and be full of cracks, comprises that MDF dusts, and it is characterized in that MDF prevents that the treatment process of bubble and be full of cracks from being following steps:
(1) elder generation carries out the filling in slit all around with the MDF of moisture content 11%～12% with epoxy resin; Epoxy resin is selected epoxy powder for use, and the powder particle size is 35～40 microns;
(2) MDF was heated under the infrared ray effect 1～6 minute, surface temperature is increased to 30～80 ℃ again, carries out MDF and dusts;
(3) MDF after dusting directly enters temperature at 130～140 ℃ curing oven, solidifies through 6～8 minutes infrared curing stove earlier, solidifies the back normal temperature cooling of coming out of the stove through 8～10 minutes thermal cycle curing oven again.
2. a kind of MDF according to claim 1 prevents the treatment process of bubble and be full of cracks, it is characterized in that, step (2) MDF heated 3～4 minutes under 8～10 kilowatts infrared ray effect, and surface temperature is increased to 50～60 ℃, carried out MDF and dusted.
3. a kind of MDF according to claim 1 prevents the treatment process of bubble and be full of cracks, it is characterized in that, step (3) curing oven is selected from infrared curing stove or thermal cycle curing oven.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201210011691 CN102553793B (en) | 2012-01-16 | 2012-01-16 | Treatment process for preventing medium density fiberboard from bubbling and cracking |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201210011691 CN102553793B (en) | 2012-01-16 | 2012-01-16 | Treatment process for preventing medium density fiberboard from bubbling and cracking |
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| Publication Number | Publication Date |
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| CN102553793A CN102553793A (en) | 2012-07-11 |
| CN102553793B true CN102553793B (en) | 2013-09-04 |
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| CN 201210011691 Active CN102553793B (en) | 2012-01-16 | 2012-01-16 | Treatment process for preventing medium density fiberboard from bubbling and cracking |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107972155B (en) * | 2017-12-04 | 2020-09-08 | 武汉科技大学 | Electrostatic coating method for powder coating of medium-density fiberboard |
| CN110126056A (en) * | 2019-04-29 | 2019-08-16 | 李珂 | A kind of manufacture craft of fireproof medium-density fiberboard |
| CN112936482B (en) * | 2021-01-29 | 2022-01-11 | 浦北县佳昌木业有限公司 | Repairing method for reducing wood board bubbles |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6541076B2 (en) * | 1999-12-20 | 2003-04-01 | Patent Holding Company | Method of priming SMC parts |
| CN1600509A (en) * | 2004-07-30 | 2005-03-30 | 王会明 | Method for manufacturing improved wood board |
| CN101289920A (en) * | 2007-04-17 | 2008-10-22 | 泉州雅泰橱柜有限公司 | High-density medium density fiber board water proof processing method |
| CN101884973A (en) * | 2009-05-15 | 2010-11-17 | 陈少生 | Powder spraying process performed on back of connecting hole of medium density fiberboard |
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| CN102553793A (en) | 2012-07-11 |
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