CN110496753A - A kind of substrate surface coating process, processing method and composite material - Google Patents
A kind of substrate surface coating process, processing method and composite material Download PDFInfo
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- CN110496753A CN110496753A CN201910880228.7A CN201910880228A CN110496753A CN 110496753 A CN110496753 A CN 110496753A CN 201910880228 A CN201910880228 A CN 201910880228A CN 110496753 A CN110496753 A CN 110496753A
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- substrate surface
- coating
- substrate
- powdery paints
- temperature
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D1/00—Processes for applying liquids or other fluent materials
- B05D1/02—Processes for applying liquids or other fluent materials performed by spraying
- B05D1/12—Applying particulate materials
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
- B05D3/02—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by baking
- B05D3/0218—Pretreatment, e.g. heating the substrate
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
- B05D3/02—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by baking
- B05D3/0254—After-treatment
- B05D3/0263—After-treatment with IR heaters
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/06—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to wood
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
- Chemical And Physical Treatments For Wood And The Like (AREA)
Abstract
The present invention relates to a kind of substrate surface coating process, including by powder paint in substrate surface；Long infrared ray heats the powdery paints of substrate surface in, makes powdery paints in substrate surface melting, levelling, solidification, to form the powder coating for being attached to substrate surface；Wherein: the wavelength of the middle long infrared ray is consistent with the infrared vibration wavelength of the molecular radical of powdery paints；The heating is kept for 3-4.5 minutes.The invention also includes a kind of method for treating surface of base, and a kind of composite material based on substrate surface coating process or method for treating surface of base.Substrate surface coating process of the invention and processing method, the long infrared heat reservoir heating powder coating in, can reliably obtain good substrate surface painting effect, avoid substrate damage, solve the problems, such as that coating process is not environmentally in the prior art.
Description
Technical field
The invention belongs to the technical fields of material surface coating, and in particular to a kind of substrate surface coating process, processing side
Method and composite material.
Background technique
With the development of technology, various types of materials in daily life and industry using more and more extensive, people are to material
Service life, aesthetics etc. requirement it is also higher and higher.This requires being surface-treated to material, such as wanted according to different
It asks and material, material is electroplated, coating etc..
For example, woodwork and its furniture are the products shaped with various wooden materials, it is to be with various wood-based planets
The product of primary raw material.After the product for being processed into various forms, the structure of wood internal does not change plate,
Such as the conduit and fiber in wood structure, the water in air and nucleus in conduit is all still in woodwork.And
The internal structure of various timber, specific gravity are all different (namely their density difference), and the weight of unit volume is also just different
Sample.The wooden specific gravity currently used for furniture industry is 0.35-0.9 tons/m3Between.The size of its conduit diameter of density difference is with regard to different
Sample, contained air and Free water are with regard to different in conduit.
If woodwork and its furniture surface is allowed to be chronically exposed in air, wood fiber can absorb the moisture in air,
Make woodwork dilatancy, and as the extension of time mouldy can also rot.Traditional guard method is with paint to wooden
The protection of product external coating.
But existing wooden materials and other substrate surfaces paint or coating process Shortcomings itself, such as paint and/
Or coating process not environmentally, be harmful to the human body and to soil, water resource, atmosphere have pollution etc..In order to overcome these environmentally friendly defects,
There is a kind of technique for carrying out coating using powdery paints, first preheats timber, it is therefore an objective to the air in timber conduit is discharged,
Then it dusts again for wood surface, the timber after dusting is heated, and powder melts is made to form paint film.Heating is used
Usual way have electric infrared heating, Hot-blast Heating etc..
However there are several technological deficiencies for this process, firstly, preheating itself can not make the air in timber conduit
All discharges, and preheating temperature is usually less than environment temperature locating for timber when making powder melts, therefore right again after preheat
Timber heat when melting its surface powder, and the air retained in timber conduit will continue to expand, and is easy to powder coating
Impact is formed, bulge is caused；Secondly, in order to reach powder melts temperature, timber will usually stop 7-15 points under high temperature environment
Clock, under this permanent stop, some timber is just carbonized due to locally reaching burning point, makes lumber fibre structure by broken
It is bad.
Therefore, develop a kind of environmental protection, be suitable for wooden material surface coating process, become and urgently to be resolved ask at present
Topic.
Summary of the invention
(1) technical problems to be solved
In order to solve the above problem of the prior art, the present invention provides a kind of substrate surface coating process, processing method, makes
Coating is carried out with a kind of low-temperature powder coating, wraps up substrate is comprehensive, can reliably obtain good substrate surface
Painting effect solves the problems, such as the prior art not environmentally, while eliminating limitation of the powder coating to material, be suitable for include
The coating on a variety of materials surface including timber.The present invention also provides one kind to be obtained by substrate surface coating process, processing method
The composite material arrived.
(2) technical solution
One of in order to achieve the above object, the main technical schemes that the present invention uses include:
A kind of substrate surface coating process, including,
By powder paint in substrate surface；
Long infrared ray heats the powdery paints of substrate surface in, make powdery paints substrate surface melt,
Levelling, solidification, to form the powder coating for being attached to substrate surface；
Wherein:
The wavelength of the middle long infrared ray is consistent with the infrared vibration wavelength of the molecular radical of powdery paints；
The heating is kept for 3-4.5 minutes.
Preferably, the powdery paints is low-temperature powder coating, and the low-temperature powder coating is heated to the low temperature powder
110-150 DEG C of the melting temperature of last coating；Or
The powdery paints is medium temperature powdery paints, and the medium temperature powdery paints is heated to the medium temperature powdery paints
150-185 DEG C of melting temperature.
Preferably, the powder paint before the substrate surface, is being formed into heat-insulated closing in substrate surface
Layer.
Preferably, substrate superficial layer before the substrate surface, is being preheated to 40-55 by the powder paint
DEG C, the substrate superficial layer includes the 0.8-1.2 mm depth to extend internally from substrate surface.
Preferably, the environment temperature of the preheating is 80-120 DEG C, and the time of the preheating is 2-3 minutes.
Preferably, the substrate is solid wood, solid wood board, bamboo, bamboo board, bamboo-wood composite material, solid wood composite material
Or bamboo glueing material.
Further relate to a kind of method for treating surface of base, wherein
One or many substrate surface coatings are carried out using the substrate surface coating process, are directed to before each coating
Substrate surface carries out surface preparation.
Preferably, the coating carries out twice, wherein in powdery paints used in first time coating and second of coating
The amount ratio of the powdery paints used is 4:6.
A kind of composite material is further related to, including substrate and the powder coating for being attached to substrate surface, wherein
The powder coating is by means of the substrate surface coating process or by means of the substrate surface treatment side
Method is attached to substrate surface, wherein be attached to the powder coating of substrate surface with a thickness of 0.6-0.9 millimeters.
Preferably, the substrate includes permeable formation, and infiltration has the low-temperature powder coating, the infiltration in the permeable formation
Layer includes the 0.9-1.2 mm depth to extend internally from the substrate surface.
(3) beneficial effect
The beneficial effects of the present invention are:
(1) by means of technique of the invention, heat is concentrated on inside powder coating when powder melts, and the temperature rise of substrate is very
It is limited, it can be expanded to avoid substrate air-in-line and go out the destruction caused to coating, can also drawn to avoid substrate because heated
Play the damages such as deformation, carbonization, burning.In this way, powdery paints can be widely used in the surface of any substrate, such as timber, bamboo
The substrate of the easy heat damage such as son.
(2) since the demand of timber, bamboo external coating is very big, in the field using in addition to that can be had
The surface effect of feel and perception is painted, while avoiding the environmental pollution generated in paint application process, and with paint
Product in use to the pollution of ambient enviroment.
Specific embodiment
In order to preferably explain the present invention, in order to understand, below by specific embodiment, present invention work is retouched in detail
It states.
The embodiment of the invention discloses a kind of substrate surface coating process, including,
By powder paint in substrate surface；
Long infrared ray heats the powdery paints of substrate surface in, make powdery paints substrate surface melt,
Levelling, solidification, to form the powder coating for being attached to substrate surface；
Wherein:
The wavelength of the middle long infrared ray is consistent with the infrared vibration wavelength of the molecular radical of powdery paints；
The heating is kept for 3-4.5 minutes.
The selection of powdery paints
Usually according to the difference of melting and solidification temperature in industry, powdery paints is divided into low-temperature powder coating, and (melting is solid
Change 150 DEG C of temperature it is following), medium temperature powdery paints (melting and solidification temperature is between 150-185 DEG C), high temperature powder coating (melts
Solidification temperature is at 185 DEG C or more).Common medium temperature powdery paints or low-temperature powder coating such as epoxy polyester base or not born of the same parents and polyester
Based powder coatings, main ingredient are resin, filler material etc..In view of timber, bamboo burning point mostly between 170-190 DEG C,
Medium temperature powder or low temperature powder is selected to be practiced in the embodiment of the present invention.Low temperature powder and when being sprayed on wood surface in selection, although
Its melting and solidification temperature is already close to timber burning point, as long as can guarantee that safety not will cause using process of the invention
Substrate high temperature deformation, carbonization etc. damage and reach ideal painting effect.
In addition, middle low-temperature powder coating, compared with high temperature powder coating of the melting temperature higher than 185 DEG C or more, melting
Solidification temperature is lower, therefore environment temperature locating for melting link substrate is lower in coating process, not only more environmentally-friendly energy conservation, no
Generate polluter.
In order to make middle long infrared ray resonate with powdery paints, the vibration of the molecular radical to selected powdery paints is needed
Dynamic wavelength with it is used in long IR wavelength matched.The wavelength of the infrared vibration of the molecular radical of powdery paints passes through
Infrared spectrum analysis acquisition is carried out to powdery paints.It should be pointed out that being not required for each molecular radical in powdery paints
It remains exactly the same.As long as in general, the vibration wavelength of most of molecular radical of the basis material of powdery paints can with made
In long infrared ray matched.
The present invention, can by matching the infrared vibration wavelength of the molecular radical in coating with middle long IR wavelength
Heating time control to be completed to melting, levelling and the solidification of powdery paints within 4 minutes.In this way, heat is in powder coating
Inside generates, and is brought rapidly up powdery paints, and the heat that substrate is conducted only by powder coating slowly heats up, heating time
In the case where 4 minutes, substrate temperature rise is more limited for control.
The present invention, which can be selected, meets the existing environment-friendly powder coatings of above-mentioned technical requirements, the scope of the present invention it
It is interior.
The selection of middle long infrared ray
Long infrared heating in using in the present invention, middle long infrared ray can carry out resonance with powdery paints and generate heat,
Heat is concentrated, and heating is rapid.Time of the substrate in middle long infrared heat conducting furnace is no more than 4.5 minutes, that is, can reach ideal
Melting, levelling, solidification effect, and not will lead to the undesirable conditions such as substrate deformation, face checking, surface blistering appearance.From reality
It tests from the point of view of situation, will control heating time best in 3.5 minutes effects.In turn since heating time is very short, heat is in substrate
In have little time conduction diffusion, the substrate surface layer of the 1.2-1.8 mm depth only to extend internally from substrate surface can be because of heat transfer
It acts on and follows heating, deeper part, will not heat up or heat up substantially and is limited, to will not make substrate depths inside substrate
Air heats in conduit are gone out, and air is avoided to break through the risk that coating causes coating surface bulge.
It is preferred that being heated using Gas Infrared furnace, without selecting electric infra-red furnace.The reason is that in the offer of Gas Infrared furnace
Long-wave infrared does not have directionality, relative to, with tropism infrared ray, heating efficiency is higher, is conducive to provided by electric infra-red furnace
Reach ideal temperature within shorter heating time.
The present invention is avoided using general heating cooking stove, and what general heating cooking stove generated is short infrared, it can penetrate whole
A wooden materials rush out the air heats in wooden materials depths (more than the depth of substrate superficial layer) fiber duct, and
The film layer for breaking through package substrate surface makes the cokled surfaces of wooden materials bubble not of uniform size one by one, and causes coating
Defective products.
There are some special timber in solid wood, density is very low, in the above-mentioned technique of application, is more suitable for using low temperature
Powdery paints, to be optimal effect.In order to make medium temperature powdery paints be suitable for more substrates, in spraying medium temperature powdery paints
Before, one layer of heat-insulated confining bed first is sprayed in substrate surface.Specifically, it is mixed using the powdered inorganic material of low thermal conductivity few
The water or resin emulsion of amount spray substrate, are infiltrated, and are preferred with resin emulsion.It is dried after the completion of processing, so
Sanding and polishing afterwards.
The powdered inorganic material raw material of the low thermal conductivity includes metakaolin, magnesia, zinc fluosilicate, polycarboxylate
And water, the ratio of preferred metakaolin, magnesia, zinc fluosilicate, polycarboxylate and water is: (4.8-5.3): (3.7-4.2):
(5.6-6.3): (0.2-0.5): (4-5).The raw material, which sufficiently reacts, forms above-mentioned powdered inorganic material.Specifically, by raw material
It is mixed into paste and sufficiently reacts, later drying and grind into powder.
The heat-insulated confining bed of substrate is formed using this powdered inorganic material, specifically by the powder and water or resin cream
Even application in substrate surface and is dried after changing liquid mixing, such as is dried by means of microwave drying tunnel.Then polishing is thrown
Light, then carry out the spray treatment of medium temperature powder.
After above-mentioned heat-insulated Seal treatment, the heat-insulated confining bed can trap heat conduction, make medium temperature powder apply
When material generates high temperature with middle long infrared ray resonance, the heat for passing to substrate is further reduced.Medium temperature powdery paints can be suitble to
Type of substrate be further expanded.Certainly, it can also first be formed in substrate surface before the spraying of low-temperature powder coating described
Heat-insulated confining bed.
Based on the above method, medium temperature powder and low-temperature powder can be suitable for all kinds of substrates, no matter common in the art
Powder coating used in metal material, still in the prior art without or the undesirable glass of spraying effect, stone material, You Jihuo
Inorganic synthese material, solid wood, bamboo or plate can be carried out spraying, and obtain good effect, to the material of substrate without special
It is required that.The present invention especially emphasizes the application in following material, such as solid wood, solid wood board, bamboo, bamboo board, bamboo and wood are compound
Material, solid wood composite material or bamboo glueing material.These type of substrate external coatings have the call at present, and the prior art applies
Dress mode is denounced at most in environmental protection, and it is consistent since, of the present invention energy also undesirable with the effect of dusty material coating
It is enough to improve these well using timber or bamboo as the effect of the substrate powder coating of primary raw material.
Further, the substrate with powder coating is cooled to 35 DEG C or less after middle long infrared heating.
Because substrate sent out after melting, levelling solidification in outside long infrared heat conducting furnace when, surface temperature still have 70 DEG C-
It 100 DEG C, needs to be added cooling step, such as natural cooling 15-20 minutes, when its surface temperature is down to 35 DEG C or less, comes out of the stove
When solidification completed, can be packed.Natural cooling, quenching etc. can be used, cooling velocity and the type of cooling have no effect on
The performance of wooden materials, Gu preferably use natural cooling, environmental protection and energy saving.
Further, substrate superficial layer before the substrate surface, is being preheated to 40- by the powder paint
55℃。
Preheating can make substrate superficial layer have certain temperature, and powdery paints is easier to adhere to, 40-55 DEG C of preheating temperature
Under degree, substrate powder utilization is good, and attaching powder is uniform, reduces powdery paints falling off from substrate surface, improves powdery paints
Utilization rate.
Common substrate such as wooden materials, specific gravity are 0.2-0.9 tons/m3Between, first time substrate surface the pre-heat treatment
By the moisture control of substrate superficial layer in 8%-16%, it can guarantee the well attached and stable coating of coating.
Further, the substrate superficial layer includes the 0.8-1.2 mm depth to extend internally from substrate surface.
Pre- thermal energy reach and keep certain depth range be superficial layer depth.Pre- thermal energy is equal by substrate surface moisture content
It is even, there is preferable electric conductivity, to improve the attachment to powdery paints, increases operation rate.Preheating is only carried out in this superficial layer,
It is not only able to reach best attachment state, and influence of the heat to substrate deep tissues is minimum, to make the finished product after spraying
Quality is the most stable.
Further, the environment temperature of the preheating is 80-120 DEG C, and the time of the preheating is 2-3 minutes.
It is controlled by the time of environment temperature and preheating to preheating, the moisture content of substrate superficial layer can be made to drop to
Appropriate range, the film for forming coating is stronger, and bubbling etc. is asked caused by avoiding or reducing because of film attachment loosely
Topic.
Further, the substrate is solid wood, solid wood board, bamboo, bamboo board, bamboo-wood composite material, solid wood composite wood
Material or bamboo glueing material.
Substrate surface coating process of the invention, processing method use low-temperature powder coating and middle long infrared heating, subtract
Lack and has negatively affected or destroy caused by handling because of high-temperature coating substrate, the processing suitable for all kinds of substrate surface coatings.
According to the second aspect of the invention, a kind of method for treating surface of base is provided,
Surface preparation is carried out for substrate surface；
One or many substrate surface coatings are carried out using substrate surface coating process described in any of the above embodiments.
Substrate surface pretreatment, the burr including removing substrate surface, polishing can make its surface more smooth, be convenient for
Powdery paints is more uniformly attached to substrate surface.
Preferably, after the above preprocessing, before substrate surface coating, heat-insulated confining bed is formed in substrate surface.
It preferably, is using one or many substrate surface coatings according to the selection of the condition of substrate itself.Multiple substrate table
Face coating is mainly for obtaining better surface quality.If substrate has handled very well using specific method in advance, make
A substrate surface coating can also obtain good surface quality, then multiple coating and nonessential.
According to the third aspect of the invention we, a kind of method for treating surface of base is provided, comprising:
Use specification for the sand paper of -500 mesh of 320 mesh polishing substrate surface；
The coating of first time substrate surface is carried out using substrate surface coating process described in any of the above embodiments；
Use specification for the sand paper of -600 mesh of 400 mesh polishing substrate surface；
Second of substrate surface coating is carried out using substrate surface coating process described in any of the above embodiments again.
When polishing substrate surface, by the selection to appropriate size sand paper, removal substrate surface hair can be improved
The efficiency of thorn；
After powder spraying curing, then the sand paper by selecting appropriate size, substrate surface is come because fiber fines can be holded up
The acne of formation are polished, and can either remove acne, and will not damage to coating, and help to obtain more preferably surface
Quality.
Further, powdery paints used in the first time substrate surface coating and second of substrate surface apply
The amount ratio of powdery paints used in dress is (35-40): (60-65).
The distribution for the amount of dusting twice, the coating of first time substrate surface is capable of forming film in principle, can after polishing again
Smooth surface is obtained, so that second of substrate surface coating can obtain the surface of more high quality.Twice in external coating
The amount ratio of powdery paints is preferred ratio.Certainly, other usage ratios are also feasible.
According to the third aspect of the invention we, the present invention also provides a kind of composite material, including substrate and it is attached to substrate
The powder coating on surface,
The powder coating is by means of substrate surface coating process described in above-mentioned one or by means of any of the above-described institute
The method for treating surface of base stated is attached to substrate surface, wherein
Be attached to the powder coating of substrate surface with a thickness of 0.6-0.9 millimeters.
It is preferred that the thickness of 0.6-0.9 millimeters of powder coating, can meet while reaching desired coating at 4 minutes
Within complete melting, levelling and cured process time require.The index of desired coating includes such as preferably covering power, weather-proof
Property, anti-aging property, resistance to acid and alkali, shock resistance etc..
Further, the substrate includes permeable formation, and infiltration has the low-temperature powder coating, the infiltration in the permeable formation
Permeable layers include the 0.9-1.2 mm depth to extend internally from the substrate surface.
The permeable formation in the attachment of substrate surface is permeated and to be formed with the low-temperature powder, and the depth of permeable formation, which is greater than, to be applied
The thickness of layer itself, adhesive force is stronger, not easily to fall off, thus, using process product obtained of the invention, not only have
There is ideal surface effect and durable, not easily to fall off.
Below the specific implementation of processing method and coating process according to the present invention will be enumerated by taking several materials as an example
Journey.
The low-temperature powder paint spraying twice of embodiment 1
Coated base: bamboo plywood carving product: its specific gravity is in 0.75 ton/m3Left and right.
First time substrate surface coating:
With the sand paper of 400 mesh by bamboo plywood carving product surface polish flat it is smooth (injustice place with high temperature compensation soil benefit
It is flat), it is sent in preheating furnace, 120 degree of in-furnace temperature, sets and stay about 2 minutes, so that its shallow skin temperature is reached 45 DEG C -55 DEG C, superficial
The moisture content of layer is in 8%-14%.
Then bamboo plywood carving product feeding powder spraying chamber is dusted coating, using low-temperature powder coating, is coated with for the first time
Amount is 30 grams/m, and coating is with a thickness of 0.3 millimeter.
It is transmitted to after upper powder is uniform in the infrared heat transfer furnace of middle length, so that low-temperature powder coating is heated to 135 DEG C, set and stay about
3 points of halfs make to be attached to the powder melts on bamboo product surface, levelling solidification, are firmly adsorbed on bamboo product surface.
Second of substrate surface coating:
After cooling, it is observed that the fiber fines on bamboo product surface can be established to form acne.
With 500 mesh sand paper polishing acne, make bamboo product surfacing.
Bamboo product is sent in preheating furnace again, 120 degree of in-furnace temperature, sets and stay 2 minutes, makes its shallow skin temperature again
Reach 45 DEG C -55 DEG C.
It is fed again into powder spraying chamber to dust coating, 50 grams/m of coating weight, sprays low-temperature powder coating.
It is conveyed once again to after upper powder is uniform in the infrared heat transfer furnace of middle length, so that low-temperature powder coating is heated to 135 DEG C, set
About 3 points of halfs are stayed, makes to be attached to the powder melts on bamboo product surface, levelling solidification, is firmly adsorbed on bamboo product surface.
In bamboo product submitting outside long infrared heat transfer furnace, rear surface temperature still has 70-100 DEG C, and natural cooling is after twenty minutes
Surface temperature is set to be down to 35 DEG C hereinafter, can pack.
Using method of the invention, product after the coating obtained using bamboo plywood carving product as substrate, coating layer thickness
It is 0.8 millimeter, infiltration layer depth is 1 millimeter, and the smooth exquisiteness of coating surface is firmly combined with substrate.
The disposable medium temperature powder coating and their application of embodiment 2
Coated base: rubber woodwork: its specific gravity is in 0.61-0.65 tons/m3Left and right.
Substrate surface coating:
Rubber wood product surface is polished flat smooth (with high temperature compensation soil filling-in at injustice) with the sand paper of 400 mesh, transmission
To preheating furnace, 120 degree of in-furnace temperature, set and stay about 2 minutes, its shallow skin temperature is made to reach 45 DEG C -55 DEG C, superficial layer it is aqueous
Rate is in 8%-14%.
Then rubber woodwork feeding powder spraying chamber is dusted coating, using medium temperature powdery paints, first time coating weight is 85
Gram/m.
It is transmitted to after upper powder is uniform in the infrared heat transfer furnace of middle length, so that medium temperature powdery paints is heated to 185 DEG C, set and stay about
4 points of halfs make to be attached to the powder melts on bamboo product surface, levelling solidification, are firmly adsorbed on rubber wood product surface.
Using method of the invention, product after the coating obtained using rubber plank as substrate, coating layer thickness is 0.85 milli
Rice, infiltration layer depth are 1 millimeter.
3 primary low-temperature powder coating and their application of embodiment
Coated base: paulownia timber product: its specific gravity is in 0.23-0.3 tons/m3Left and right.
Disposable substrate surface coating:
Paulownia timber product surface is polished flat smooth (temperature compensation soil filling-in in using at injustice) with the sand paper of 400 mesh, coating
Confining bed, and it is smooth to polish flat again,
It transmits in preheating furnace, sets and stay about 2 minutes, so that its shallow skin temperature is reached 45 DEG C or so, the moisture content of superficial layer exists
8%-12%.
Then paulownia timber product feeding powder spraying chamber is dusted coating low-temperature powder coating, once the amount of dusting is total amount of dusting
100% (60 grams/m of coating weight), upper powder are uniformly transmitted in long infrared heat transfer furnace, are heated low-temperature powder coating
It to 120 DEG C, sets and stays about 4 minutes, make the melting of low-temperature powder coating, levelling, solidification, be then transported on out middle long infrared heat transfer furnace
Outside, it is packaged after cooling in 30 minutes, the product after obtaining coating.
Using the method for the present embodiment, coating layer thickness is 0.6 millimeter, and infiltration layer depth is 1.2 millimeters.
Using the powder coating and their application method in above embodiments 1-3, obtained product coating resistance to acid and alkali 159 hours,
Shock resistance is greater than 50, and glossiness can protect color gloss retention 5 years constant, powder using efficiencies 99%, adhesive force grid according to requiring to adjust
Testing 1MM*100 is 100%, hardness 1H or more.
Finally, it should be noted that above-described embodiments are merely to illustrate the technical scheme, rather than to it
Limitation；Although the present invention is described in detail referring to the foregoing embodiments, those skilled in the art should understand that:
It can still modify to technical solution documented by previous embodiment, or to part of or all technical features into
Row equivalent replacement；And these modifications or substitutions, it does not separate the essence of the corresponding technical solution various embodiments of the present invention technical side
The range of case.
Claims (10)
1. a kind of substrate surface coating process, it is characterised in that: including,
By powder paint in substrate surface；
Long infrared ray heats the powdery paints of substrate surface in, make powdery paints substrate surface melting, levelling,
Solidification, to form the powder coating for being attached to substrate surface；Wherein:
The wavelength of the middle long infrared ray is consistent with the infrared vibration wavelength of the molecular radical of powdery paints；The heating keeps 3-
4.5 minute.
2. substrate surface coating process according to claim 1, it is characterised in that:
The powdery paints is low-temperature powder coating, and the low-temperature powder coating is heated to the melting of the low-temperature powder coating
110-150 DEG C of temperature；Or
The powdery paints is medium temperature powdery paints, and the medium temperature powdery paints is heated to the melting of the medium temperature powdery paints
150-185 DEG C of temperature.
3. substrate surface coating process according to claim 1, it is characterised in that:
The powder paint before the substrate surface, is being formed into heat-insulated confining bed in substrate surface.
4. substrate surface coating process according to claim 1, it is characterised in that:
Substrate superficial layer before the substrate surface, is being preheated to 40-55 DEG C, the substrate by the powder paint
Superficial layer includes the 0.8-1.2 mm depth to extend internally from substrate surface.
5. substrate surface coating process according to claim 4, it is characterised in that: the environment temperature of the preheating is 80-
120 DEG C, the time of the preheating is 2-3 minutes.
6. substrate surface coating process according to claim 1-5, it is characterised in that: the substrate be solid wood,
Solid wood board, bamboo, bamboo board, bamboo-wood composite material, solid wood composite material or bamboo glueing material.
7. a kind of method for treating surface of base, which is characterized in that
One or many substrate surface coatings are carried out using substrate surface coating process described in any one of claims 1-6, often
It is directed to substrate surface before secondary coating and carries out surface preparation.
8. method for treating surface of base according to claim 7, which is characterized in that
The coating carries out twice, wherein powder painting used in powdery paints used in first time coating and second of coating
The amount ratio of material is 4:6.
9. a kind of composite material, including substrate and the powder coating for being attached to substrate surface, which is characterized in that
The powder coating is by means of substrate surface coating process described in any one of claims 1-6 or by means of claim
The described in any item method for treating surface of base of 7-8 are attached to substrate surface, wherein
Be attached to the powder coating of substrate surface with a thickness of 0.6-0.9 millimeters.
10. composite material according to claim 9, which is characterized in that the substrate includes permeable formation, in the permeable formation
Infiltration has the low-temperature powder coating, and the permeable formation includes the 0.9-1.2 mm depth to extend internally from the substrate surface.
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