JP2013000630A - Method and apparatus for applying coating agent on surface of plate to be coated - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method and apparatus for applying a coating agent on the surface of a plate to be coated, which is capable of achieving the reduction of a treatment time and a treatment space, the disuse or simplification of equipment and the reduction of equipment cost, without requiring drying treatment.SOLUTION: A holder member for holding a coating member to elastically press it to the surface of the plate to be coated and a dam member on the upstream side to the coating member with a certain interval are provided. An inclined surface is provided on the coating member side of the dam member. The coating agent is supplied to fall down on the inclined surface. The inclined surface and the coating member are heated to control the temperature. Thereby, while keeping the flowability of the supplied coating agent, the coating agent is uniformly pressed and applied on the surface of the plate to be coated by the coating member.

Description

The present invention relates to a method and apparatus for applying a coating agent to the surface of a plate to be coated such as a wood-based veneer or a plywood.

Conventionally, as a coating method and apparatus for this type of coated plate, a water-based or solvent-based coating agent is used, and a roll coater, knife coater, or the like is used to make the surface of the coated plate with a concave defect smooth and good. There was something to paint (Patent Document 1).

In recent years, coating agents are also required to have high productivity, safety, and environmental friendliness. In the case of water-based resins, the time and cost spent for drying are problematic, and in the case of solvent-based solvents, volatile organic compounds during drying are problematic.

In view of the above problems, conversion to a reactive hot melt that immediately solidifies upon cooling, does not contain a solvent, and has heat resistance has been attempted.

However, when a reactive hot melt is used as a coating agent, depending on the nature of the reactive hot melt, the coating agent increases in viscosity due to cooling immediately after being supplied to the surface of the coated plate. When a reservoir cannot be formed, or when a knife coater is used, the coating agent does not spread on the surface of the plate to be coated, and the supply to the end is insufficient. It hardens and becomes difficult to apply. Therefore, it has been desired to develop a coating method and apparatus that solves these problems.

JP 2002-79165 A

The present invention has been made in order to meet the demand for the development of a coating method and apparatus in which such problems are eliminated. The object of the present invention is to shorten processing time and processing space without requiring drying treatment. Another object of the present invention is to provide a method and an apparatus for applying a coating agent to the surface of a plate to be coated, which can be abolished or simplified and reduce the equipment cost.
In addition, sufficient fluidity of the coating agent can be ensured up to the application member such as a knife coater, and the initial application purpose can be achieved without the need for habituation, smoothing or drying treatment of the coating agent after application. Another object of the present invention is to provide a method and apparatus for applying a coating agent to the surface of a plate to be coated.

The present invention has been made in order to solve the above-described problems. The object of the present invention is to provide a method and apparatus for applying a coating agent on the surface of a plate to be coated using a coating member. A holder member that holds the application member so as to be elastically pressed, and a laying member is installed at a distance upstream from the application member, and an inclined surface is provided on the application member side of the laying member. The coating agent is supplied and dropped onto the inclined surface, and the inclined surface and the coating member are heated so that the temperature can be adjusted, and the fluidity of the supplied coating agent is maintained by the coating member while maintaining the fluidity of the supplied coating agent. A method and an apparatus for applying a coating agent to the surface of a plate to be coated are characterized in that the coating agent is applied under pressure following the coating.

The method and apparatus for applying the coating agent to the surface of the coated plate of the present invention can ensure sufficient fluidity of the coating agent up to the coating member such as a knife coater. The initial application purpose can be achieved without the need for a drying process, and the processing time and the application agent can be adjusted to the coated plate surface after application without smoothing or drying. Processing space can be shortened, equipment can be abolished and simplified, and equipment costs can be reduced.

It is a side view which shows the 1st Example of the coating device of the coating agent to the to-be-coated board surface of this invention (a coating member is a knife coater and a front-end | tip is a blade). In the figure, the side guide is omitted. FIG. 2 is a plan view of the apparatus of FIG. 1. In the figure, the blade holding cylinder is omitted. It is a side view which shows the 2nd Example of the coating device of the coating agent to the to-be-coated board surface of this invention (a coating member is a knife coater and a front-end | tip is semicircle shape). In the figure, the side guide is omitted. It is a side view which shows the 3rd Example of the application | coating agent application | coating apparatus to the to-be-coated board surface of this invention (The shape where the application | coating member was a knife coater and the front-end | tip was notched in the circle). In the figure, the side guide is omitted. It is a side view which shows the 4th Example of the coating device of the coating agent to the to-be-coated board surface of this invention (a coating member is a knife coater and a front-end | tip is a triangle). In the figure, the side guide is omitted. It is a side view which shows the 5th Example of the coating device of the coating agent to the to-be-coated board surface of this invention (when a coating member is a knife coater and a front-end | tip is a braid | blade, and a pre-filling auxiliary member is not required). In the figure, the side guide is omitted. It is a side view which shows the 6th Example of the coating device of the coating agent to the to-be-coated board surface of this invention (when a coating member is a knife coater and a front-end | tip is a braid | blade, and a pre-filling auxiliary member is not required). In the figure, the side guide is omitted. It is a side view which shows the 7th Example of the coating device of the coating agent to the to-be-coated board surface of this invention (A coating member is a knife coater and the front-end | tip is semicircle shape. Moreover, when a pre-filling auxiliary member is not required) ). In the figure, the side guide is omitted. It is a side view which shows the 8th Example of the application | coating agent application | coating apparatus to the to-be-coated board surface of this invention (The shape where the application | coating member was a knife coater and the front-end | tip was cut into a circle. If not needed). In the figure, the side guide is omitted. It is a side view which shows the 9th Example of the coating device of the coating agent to the to-be-coated board surface of this invention (When a coating member is a knife coater and a front-end | tip is a triangle. And a pre-filling auxiliary member is not required). In the figure, the side guide is omitted. It is a side view which shows the 10th Example of the coating device of the coating agent to the to-be-coated board surface of this invention (a coating member is a knife roll coater). In the figure, the side guide is omitted. It is a side view which shows the 11th Example of the coating device of the coating agent to the to-be-coated board surface of this invention (a coating member is a squeeze coater). In the figure, the side guide is omitted. It is explanatory drawing of the test piece of the coating agent by the plywood bonded together in the crank shape.

The method for applying the coating agent to the surface of the coated plate according to the present invention is a method in which the coating agent is applied to the surface of the coated plate using the coating member, and the supporting member is spaced upstream from the coating member. In addition, an inclined surface is provided on the application member side of the supporting member, the coating agent is supplied and dropped on the inclined surface, and the inclined surface and the application member are heated so that the temperature can be adjusted. While maintaining the fluidity of the coating agent, it is characterized in that the coating agent is applied to the surface of the plate to be coated by pressurizing the coating plate by the application member.

As the above-mentioned coated board, single board, plywood, particle board, wood fiber board (MDF = medium density fiber board, hard board, insulation board), wood board such as LVL, OSB, wood plastic board, calcium board, Inorganic boards such as cement boards, inorganic fiber boards (rock wool boards, glass wool boards, etc.), lightweight foamed concrete, foams such as phenol foam, urethane foam, styrofoam, and molding materials and fillers such as inorganic and organic chips, and interfaces Examples include composite plates in which activators, fibrous and plate-like reinforcing materials, and the like are combined. The plate to be coated may be a composite of two or more types of plates to be coated with an adhesive or the like.

As said coating agent, a repair agent, an adhesive agent, and a coating agent are contained according to the application objective. Here, the repair agent is applied to defective recesses such as cracks, wormholes, cutouts, eye holes, and annual rings on the surface of the plate, and is applied to warps and ribs to repair the smooth surface by closing the defective recesses. The coating agent to be formed. The above adhesive is applied to one or both adherends when adhering organic and inorganic adherends such as woods, plastics, sheets, metals, and glass to adherends. It is a coating agent that performs adhesion. And the said coating agent is an application agent except the said repair agent and an adhesive agent, Comprising: For example, it is a coating agent which carries out the finish finish of the makeup | decoration finish or the concrete formwork surface. In some cases, the same material may serve as multiple roles of the repair agent, adhesive, and coating agent.

Examples of the composition of the coating agent include urethane resin, low density and high density polyethylene resin, polyolefin resin, epoxy resin, acrylic resin, vinyl acetate resin, ethylene-vinyl acetate copolymer resin, and formalin resin. One or two or more types are used as a base resin, and if necessary, one or more of tackifiers, waxes, plasticizers, surfactants, fillers, and curing agents are added to the base resin. What was blended is mentioned. Among them, it is preferable to add a curing agent for the purpose of promoting curing and drying, improving heat resistance, water resistance, and weather resistance. The coating agent preferably has a melt viscosity at 100 ° C. of 1 to 1000 Pa · s. When mixing two or more types of resins to make a base resin, at least one type is a moisture curable urethane resin having an NCO content of 1% or more (wt%), and 0.5 to 50 wt% is added to the coating agent. It is preferable to do.

The tackifier used in the coating agent is not particularly limited, and examples thereof include rosin resins, terpene resins, petroleum resins, styrene resins, coumarone resins, phenol resins, and the like. Examples of rosin resins include rosins such as gum rosin and wood rosin, and derivatives thereof (for example, hydrogenated rosin, disproportionated rosin, dehydrogenated rosin, rosin glycerin ester, rosin pentaerythritol ester and other rosin esters, and maleic acid adducts. Rosin metal salt). Examples of terpene resins include terpene resins that are polymers of terpenes such as limonene, α-pinene, β-pinene, dipenter, myrcene, bornylene, camphene, and phenol-modified terpene resins obtained by modifying these terpenes with phenols. Is mentioned. Examples of petroleum resins include aliphatic petroleum resins, alicyclic petroleum resins, and the like made from distillates such as styrene, α-methylstyrene, vinyltoluene, indene, methylindene, butadiene, isoprene, piperylene, and ventylene. Aromatic petroleum resins, cyclopentadiene homo- or copolymers, and the like are included. The petroleum-based resin is often a polymer using a C _{5 to} C ₉ distillate as a main component, and may be hydrogenated such as a hydrogenated cyclopentadiene resin. Examples of the styrene resin include a low molecular weight homopolymer of styrene, a copolymer of styrene and α-methylstyrene, vinyl toluene, butadiene rubber, and the like. Coumarone-based resins include, for example, coumarone-indene resin, phenol-modified coumarone-indene resin, and the like. Examples of phenolic resins include reaction products of phenols such as phenol, cresol, xylenol, resorcinol, toluene, pt-butylphenol, and pphenylphenol with aldehydes such as formaldehyde, acetaldehyde, and furfural, and rosin-modified phenolic resins. Etc. are included. You may mix | blend a tackifier with 2 or more types of tackifiers together.

The wax used in the coating agent is not particularly limited, and for example, there are natural wax and synthetic wax. As natural wax, paraffin wax, microcrystalline wax, carnauba wax, carbonyl group-containing wax and mixtures thereof, synthetic wax Examples thereof include polyolefin wax. You may mix | blend a wax in combination of 2 or more types of waxes.

The plasticizer used in the coating agent is not particularly limited. For example, dibutyl phthalate, dioctyl phthalate, tricresyl phosphate, trioctyl phosphate, dioctyl adipate, isodecyl succinate, diethylene glycol dibenzoate, pentaerythritol ester, propylene adipate Examples thereof include glycol polyester, butylene glycol adipate polyester, butyl oleate, methyl acetylricinoleate, tris (2-ethylhexyl) trimellitic acid, and trialkyl normal trimellitic acid. You may mix | blend a plasticizer combining 2 or more types of plasticizers.

The surfactant used in the coating agent is not particularly limited, and examples thereof include a cationic surfactant, an anionic surfactant, an amphoteric surfactant, and a nonionic surfactant. The surfactant may be blended in combination of two or more surfactants. Examples of the cationic surfactant include quaternary ammonium salt type surfactants and amine salt type surfactants. Examples of the anionic surfactant include carboxylic acid or a salt thereof, sulfate ester salt, carboxymethylated salt, sulfonate salt, and phosphate ester salt. Examples of the amphoteric surfactant include a carboxylate type amphoteric surfactant, a sulfate ester type amphoteric surfactant, a sulfonate type amphoteric surfactant, and a phosphate ester type amphoteric surfactant. Nonionic surfactants include alkylene oxide addition type nonionic surfactants and polyhydric alcohol type nonionic surfactants.

The filler used in the coating agent is not particularly limited. For example, calcium carbonate, magnesium carbonate, zinc carbonate, calcined silica, fused silica, precipitated silica, fumed silica, pulverized silica, diatomaceous earth, bentonite, oxidation Titanium, magnesium oxide, barium oxide, iron oxide, zinc oxide, mica, kaolin clay, calcined clay, calcined clay, talc, carbon black, cellulosin, pulp, coconut powder, wheat flour, rapeseed meal, rice flour, corn starch, potato Examples include inorganic or organic fillers such as starch, corn gluten, milk casein, wood powder, egg white powder, rice flour, and soy protein, and these fatty acids, resin acids, processed fatty acid esters, and the like. You may mix | blend a filler in combination of 2 or more types of fillers.

The curing agent used in the coating agent is not particularly limited as long as it reacts with any one or more of the blending components. For example, an isocyanate compound, an epoxy compound, a hydroxyl group compound, an acid, an alkali, Etc. You may mix | blend a hardening | curing agent using 2 or more types of hardening | curing agents together. Especially, it is preferable to mix | blend 0.5-50 weight% of compounds with NCO content rate 30% or more (weight%) in a coating agent.

The coating agent preferably has a melt viscosity at 100 ° C. of 1 to 1000 Pa · s, and has a set time (ST) of 5 seconds to 30 minutes and an open time (OT) of 5 seconds to 30 minutes in an atmosphere of 20 ° C. Any adhesive or paint having a performance with a tack free time (TFT) falling within the range of 5 seconds to 18 hours may be used. ST, OT, and TFT were measured by the following methods.
<Measurement of Set Time (ST)> A coating agent whose temperature is adjusted to 120 ° C. at a tip of 2.5 cm × 2.5 cm of a 2.5 cm × 10 cm × 5.5 cm (thickness) southern plywood with a material temperature of 20 ° C. About 0.09g was applied, and after about 3 seconds, another plywood (material temperature 20 ° C) was pasted together in a crank shape (see Fig. 13), cold-pressed at 3 kgf / cm ² for 5 seconds, and then left for an arbitrary time. Later, with a push-pull gauge, a point 25 mm from the end of the test piece was measured at 500 mm / min. Pressing at the above speed, the strength and material breakage rate were measured. The time when the xylem step rate was 100% was taken as the set time.
<Measurement of Open Time (OT)> A coating agent whose temperature is adjusted to 120 ° C. at a tip of 2.5 cm × 2.5 cm of a 2.5 cm × 10 cm × 5.5 cm (thickness) southern plywood with a material temperature of 20 ° C. Apply approximately 0.09g, and after standing for an arbitrary period of time, paste another plywood (material temperature 20 ° C) in a crank shape (see Fig. 13) and cool it down at 3kgf / cm ² for 5 seconds, then set time After being left for a long time, a point of 25 mm from the end of the test piece was set at 500 mm / min. Pressing at the above speed, the strength and material breakage rate were measured. The time at which the xylem step rate was 100% was defined as the open time.
<Tack-free time (TFT)> About 2.5 cm x 10 cm x 5.5 cm (thickness) of the south seawood plywood with a material temperature of 20 ° C. 0.09 g was applied, and after standing for an arbitrary time, the tackiness of the coating agent was confirmed by finger touch. The time until tack was completely eliminated was defined as tack free time.

In the case of solid (solid) at 40 ° C. or lower, the coating agent is, for example, a pellet solid and is provided by heating and melting on the inclined surface of the laying member.

The inclined surface of the laying member is heated and adjusted to 70 to 250 ° C., and the coating agent supplied here is heated and supplied to the surface of the substrate to be transported while maintaining its fluidity.

The surface of the plate to be coated is preheated so that the supplied coating agent maintains fluidity. As a method for preheating the surface of the plate to be coated, the bottom surface (lower surface) of the above-mentioned supporting member is brought close to the surface of the plate to be coated, the bottom surface is heated so that the temperature can be adjusted, and Warm the surface to 10-60 ° C.

The application member is, for example, a conventionally known knife coater or squeeze coater. These application members are held by a holder member. The application member is heated to a temperature of 70 to 250 ° C. by suitable heating means. When it is advantageous in production to provide the holder member with heating means, the holder member is provided with heating means to heat the application member to 70 to 250 ° C. so that the temperature can be adjusted. By heating the coating member, the coating agent can be reliably pressurized while maintaining its fluidity.

In addition, the coating agent coating apparatus for the coated plate surface according to the present invention is a device that applies the coating agent to the surface of the coated plate using the coating member, and a conveying means for feeding the coated plate, and the coating member. A holder member for holding the coating member so as to elastically press the tip of the coating plate against the surface of the coated plate, a supporting member installed at a distance upstream from the coating member, and the supporting member. And a coating agent supplying means for supplying and dropping the coating agent on the inclined surface provided on the coating member side of the member. The heating member for heating the coating member is provided on the holder member and the inclined surface is heated. A heating means is provided on the above-mentioned supporting member.

When the application member is a knife coater and the tip is a blade, the thickness of the blade is preferably 0.3 to 5 mm. If the thickness of the blade is less than 0.3 mm, the coating amount cannot be reduced, which is economically disadvantageous. When the thickness of the blade exceeds 5 mm, the blade is clogged with scraps on the plate to be coated, and uneven coating tends to occur. The tip of the knife coater may be curved or semicircular, or may be a shape with a cut in a circle. It is preferable that the blade portion and the tip portion of the knife coater, the knife roll of the knife roll coater, and the squeeze roll of the squeeze coater are made of uniformly hardened steel. It is possible to equalize the thermal expansion during heating, and to prevent distortion caused by non-uniform thermal expansion.

Also, the bottom surface of the holder member close to the plate to be coated is provided with one or more grooves that collect the coating agent flowing from the upstream side and flow into the defect recesses of the plate to be coated. A pre-filling auxiliary member having a structure in which the flow is gradually converged and pressed toward the defective portion of the plate to be coated from the traveling direction is provided. A heating means for heating the bottom surface portion is provided to maintain the fluidity of the coating agent flowing down from the inclined surface of the laying member to the upper surface of the coated plate. This heating means may be the same as the heating means for heating the application member. That is, the whole holder member may be heated.

Furthermore, a heating means for heating the bottom surface of the laying member is provided, the surface of the coated plate to be conveyed is heated in advance, and the coating agent flowing down the inclined surface is conveyed and supplied in a low temperature state. Solidify with a plate so that fluidity is not lost. This heating means may be the same as the heating means for heating the inclined surface. That is, you may make it heat the whole supporting member.

In addition, on the upper part of the above-mentioned laying member, there is a coating agent that is provided by dropping a blocking plate that suppresses the rotating flow of the coating agent, suppresses the generation of entrained bubbles, and promotes the first-in first-out of the liquid as necessary. Ensure that the above-mentioned tendency is supplied.

Further, an anti-overlapping warp jig is provided on the upstream side of the above-mentioned laying member so that the to-be-coated plates are conveyed one by one with no gap.

Side guide plates are provided on both sides of the coating member and the supporting member in order to prevent lateral sag of the coating agent and to improve the conveyance accuracy of the coated plate. The side guide plate is also provided with heating means.

The inclined surface of the above-mentioned laying member varies depending on the fluidity, viscosity, hardness, and drying speed of the coating agent, but the angle is preferably 15 to 75 °.

It is preferable that the lower end of the inclined surface is positioned at a position of 3 to 300 mm from the contact point between the tip of the knife and the surface of the coated plate. If the thickness is less than 3 mm, insufficient filling of the defective portion and coating blurring are likely to occur, and if it exceeds 300 mm, the coating agent increases, the pot life is shortened, solidification and cured products are likely to occur, and carbonization occurs. It becomes easy.

As the heating means, for example, an electric heating sheet or an electric heating rod is used.

An embodiment of the apparatus of the present invention will be described with reference to the drawings. The drawings described below are one embodiment of the present invention, and each member and its position are not limited as long as the object is achieved. FIG. 1 is a side view showing a first embodiment of a coating apparatus for applying a coating agent on the surface of a plate to be coated according to the present invention, FIG. 2 is a plan view thereof, in which 1 is a knife coater (tip is a blade), Reference numeral 2 denotes a holder member to which the knife coater 1 is attached, 3 denotes a support member, 4 denotes a coating agent supply member, and P denotes a plate to be coated. 3 shows a semicircular tip of the knife coater, FIG. 4 shows a shape in which the tip of the knife coater is cut into a circle, and FIG. 5 shows a triangular tip of the knife coater. 6 and 7 show a knife coater when no pre-filling auxiliary member is required, FIG. 8 shows a knife coater with a semicircular tip when no pre-filling auxiliary member is required, and FIG. 9 shows a pre-filling auxiliary member. A knife coater having a shape in which a tip is cut into a circle when not required, FIG. 10 is a knife coater having a triangular tip when no pre-filling auxiliary member is required, FIG. 11 is a roll knife coater as a coating member, FIG. Is a squeeze coater used for the coating member.

The coated plate P is a plywood, a single plate, a particle board, a wooden board such as MDF, a surface board such as a calcium board, a wood cement board, an inorganic fiber board, a crack, a wormhole, an omission, an eyeball, It has a defect part that requires repair such as a crack, and is conveyed in the direction of the arrow (downstream direction) by appropriate conveying means (not shown). The conveying means may be any conventionally known means as long as it is a means that moves the plate to be coated P at a desired speed while being held in a substantially horizontal state.

The knife coater 1 is detachably attached and fixed to the holder member 2 by a set bolt 1a so as to be inclined obliquely downward in the downstream direction. The tip of the knife coater 1 is held in contact with the surface of the plate to be coated P. The knife coater 1 is preferably provided with a blade pressing cylinder 1b that enhances contact between the blade at the tip of the knife and the plate P to be coated and pressurizes and squeezes the amount of coating agent. The tip of the knife coater 1 may be a blade having a thickness of 0.3 to 5 mm, and may be a curve, a semicircle, a shape obtained by cutting a circle, a triangle, or the like. Instead of the knife coater 1, a knife roll coater 11 (see FIG. 11) and a squeeze coater 21 (see FIG. 12) may be used.

The holder member 2 is rotatably attached to the horizontal shaft 2a. The holder member 2 has a heating means 2b inside, and adjusts the temperature of the knife coater 1 to 70 to 250 ° C. Further, the bottom surface of the holder member 2 is close to the surface of the plate to be coated P while keeping a predetermined gap S (a gap larger than the thickness of the coating agent supplied onto the plate to be coated P). The temperature of the coating agent supplied to the surface of the plate P is adjusted so that the coating agent maintains a fluid state. The gap S is adjusted to 1 to 20 mm, preferably 3 to 8 mm. When the gap S is 1 mm or less, insufficient filling due to chipping in the defective portion is likely to occur. When the clearance S is 20 mm or more, the coating agent that has flowed from the upstream side becomes insufficiently concentrated in the direction of the plate to be coated, and the flow rate of the coating agent that should fill the defect portion is lowered, resulting in poor filling.

As is clear from FIG. 2, side guide plates 5 are provided on both sides of the plate to be coated P to prevent the supplied coating agent from flowing out to both sides of the plate to be coated P. Yes. The side guide 5 has a ruler for the coated plate P and a function of preventing lateral sag in the transport direction. In addition, a foreign matter removing operation is required as appropriate in order to accumulate the solidified material, the broken material of the coated plate P, and the cured resin. When performing fore edge coating, a side guide 5 of the type that forcibly causes lateral sag and applies pressure is preferable. The temperature of the side guide 5 is also adjusted to 70 to 250 ° C.

The laying member 3 is installed at a distance from the knife coater 1 on the upstream side (the direction opposite to the conveying direction) with respect to the knife coater 1. Is forming. The coating agent supply port F is formed with an inclined surface 3a inclined in the oblique direction in the downstream direction, and the coating agent is supplied and dropped onto the inclined surface 3a to heat the inclined surface 3a. Thus, the supplied coating agent is prevented from being cooled and solidified to maintain fluidity. The supply amount of the coating agent is set to be 2 to 10 times (weight ratio) of the coating agent that is normally applied for 1 minute between the knife tip and the coating agent supply unit.

Further, it is desirable that the urging member 3 is kept close to the plate to be coated P as much as possible and close to the plate to be coated P in a range where no damage occurs. The urging member 3 heats the bottom surface portion 3b to preheat (preheat) the surface of the plate to be coated P, and the coating agent fed down to the surface of the plate to be coated P is solidified. To prevent fluidity.

Reference numeral 3c denotes a blocking plate, which ensures that the coating agent dropped from the coating agent supply means 4 is supplied to the inclined surface 3a of the laying member 3. The blocking plate 3c holds the amount of coating agent necessary for coating, and controls the prevention of entrained bubbles and the first-in first-out of the coating agent. 3d is a warp jig for preventing overlap so that the to-be-coated plates P are conveyed one by one with no gap. 3e is a heating means.

When the coating agent is liquid or semi-kneaded fluid, the coating agent supply means 4 is circular using a supply device such as a cylinder pump, a gear pump, a snake pump, a plunger pump, or a diaphragm pump. Supplied from a coating nozzle such as a Huigo type. When the coating agent is a solid such as a pellet, it is discharged after being heated and melted to form a fluid. For example, one liquid or two liquids or more are mixed and discharged by a kneader feeder that can be continuously melted by heating, or an extruder and an agitator.

Next, the repair method by the repair apparatus of the to-be-coated board of the said Example is demonstrated. The coated plate P, which is appropriately conveyed in the direction of the arrow by a conveying means (not shown), is controlled by the warpage jig 3d for preventing the overlapping of the laying member 3 so that it is not carried in an overlapping manner. It is carried in to the side.

The to-be-coated plate P carried into the lower side of the supporting member 3 is installed on the lower bottom surface of the holder member 2 while being heated by the bottom surface portion 3b of the supporting member 3 which is temperature-controlled by the heating means 3e. It is sent below the knife coater 1 from the pre-filling auxiliary member 2c.

On the other hand, the coating agent is dropped from the repair agent supplying means 4 onto the inclined surface 3 a of the laying member 3. The coating agent supplied onto the inclined surface 3a is supplied to the lower plate to be coated P while being heated and maintained in a fluid state. As described above, the coated plate P is heated by the bottom surface portion 3b and is further heated by the bottom surface portion of the holder member 2, so that the coating agent supplied to the coated plate P flows. The state is maintained and sent to the knife coater 1.

Of the supplied coating agent, in particular, the repair agent supplied to the defective portion such as the concave portion of the plate to be coated P is filled in the defective portion by the pre-filling auxiliary member 2c located under the holder member 2. The The repair agent on the surface of the coated plate P is further repaired by applying pressure to the knife coater 1 in accordance with the detailed defect portions such as the conduit portion, dry cracks, cracks, and the like, as well as wide portions of the eyeballs and gaps.

Next, specific examples of the present invention will be described together with comparative examples.

First, specific examples 1 and 2 and comparative examples 1 and 2 are shown in Table 1.

About the applicability | paintability in the said Table 1, the coating liquid was apply | coated and the smoothness immediately after was evaluated visually.
◎: Uniformly applied ○: Almost uniformly applied, but with some roping marks ×: Not uniformly applied

Moreover, about the filling property in Table 1, the defect recessed part of diameter 10mm and depth 2.3mm was artificially created three places, and the filling property to a defect recessed part was evaluated visually.
◎: Filled in all three places ○: Filled in one or two places ×: Not filled in one place

<Specific example 1>
Three defect recesses with a diameter of 10 mm and a depth of 2.3 mm were created on the surface of 12 mm 5 ply Nanyang plywood (width 1 scale, length 3 scale, moisture content 8%, material temperature 23 ° C.), urethane resin: HP-820 ( NCO content: 1.5% (manufactured by J-Chemical Co., Ltd.), the invention was repaired under the conditions shown in Table 1 using the knife coater of FIG.

<Specific example 2>
Three defect recesses with a diameter of 10 mm and a depth of 2.3 mm were created on the surface of 12 mm 5 ply Nanyang plywood (width 1 scale, length 3 scale, moisture content 8%, material temperature 23 ° C.), urethane resin: HP-820 ( NCO content: 1.5% (manufactured by J-Chemical Co., Ltd.), the invention was repaired under the conditions shown in Table 1 using the knife coater of FIG.

<Comparative Example 1>
12mm5ply Nanyang wood plywood (width 1mm, length 3mm, moisture content 8%, material temperature 23 ° C) on the surface, three defect recesses with a diameter of 10mm and a depth of 2.3mm were created, except that the paper was removed Repair was performed under the conditions of Example 1.

<Comparative example 2>
12mm5ply Nanyang wood plywood (width 1mm, length 3mm, moisture content 8%, material temperature 23 ° C) on the surface, three defect recesses with a diameter of 10mm and a depth of 2.3mm were created, except that the paper was removed Repair was performed under the conditions of Example 2.

Next, specific examples 3 to 7 are shown in Table 2.

<Specific example 3>
Three defect recesses with a diameter of 10 mm and a depth of 2.3 mm were created on the surface of 12 mm 5 ply Nanyang plywood (width 1 scale, length 3 scale, moisture content 8%, material temperature 23 ° C.), urethane resin: HP-820 ( NCO content: 1.5% (manufactured by J-Chemical Co., Ltd.), the invention was repaired using the knife coater of FIG.

<Specific Example 4>
Three defect recesses with a diameter of 10 mm and a depth of 2.3 mm were created on the surface of 12 mm 5 ply Nanyang plywood (width 1 scale, length 3 scale, moisture content 8%, material temperature 23 ° C.), urethane resin: HP-820 ( NCO content: 1.5% (manufactured by J-Chemical Co., Ltd.), the present invention was repaired under the conditions shown in Table 2 using the knife coater of FIG.

<Specific Example 5>
Three defect recesses with a diameter of 10 mm and a depth of 2.3 mm were created on the surface of 12 mm 5 ply Nanyang plywood (width 1 scale, length 3 scale, moisture content 8%, material temperature 23 ° C.), urethane resin: HP-820 ( NCO content: 1.5%, manufactured by J-Chemical Co., Ltd.) and repaired under the conditions shown in Table 2 using the knife coater of FIG.

<Specific Example 6>
Three defect recesses with a diameter of 10 mm and a depth of 2.3 mm were created on the surface of 12 mm 5 ply Nanyang plywood (width 1 scale, length 3 scale, moisture content 8%, material temperature 23 ° C.), urethane resin: HP-820 ( NCO content: 1.5%, manufactured by J-Chemical Co., Ltd.) and repaired under the conditions shown in Table 2 using the knife coater of FIG.

Specific examples 7 to 10 are shown in Table 3.

<Specific example 7>
Three defect recesses with a diameter of 10 mm and a depth of 2.3 mm were created on the surface of 12 mm 5 ply Nanyang plywood (width 1 scale, length 3 scale, moisture content 8%, material temperature 23 ° C.), urethane resin: HP-820 ( NCO content: 1.5% (manufactured by J-Chemical Co., Ltd.), the invention was repaired using the knife coater of FIG.

<Specific Example 8>
Three defect recesses with a diameter of 10 mm and a depth of 2.3 mm were created on the surface of 12 mm 5 ply Nanyang plywood (width 1 scale, length 3 scale, moisture content 8%, material temperature 23 ° C.), urethane resin: HP-820 ( NCO content: 1.5%, manufactured by J-Chemical Co., Ltd.), using the knife coater of FIG.

<Specific example 9>
Three defect recesses with a diameter of 10 mm and a depth of 2.3 mm were created on the surface of 12 mm 5 ply Nanyang plywood (width 1 scale, length 3 scale, moisture content 8%, material temperature 23 ° C.), urethane resin: HP-820 ( NCO content: 1.5%, manufactured by J-Chemical Co., Ltd.) and repaired under the conditions shown in Table 3 using the knife coater of FIG.

<Specific Example 10>
Three defect recesses with a diameter of 10 mm and a depth of 2.3 mm were created on the surface of 12 mm 5 ply Nanyang plywood (width 1 scale, length 3 scale, moisture content 8%, material temperature 23 ° C.), urethane resin: HP-820 ( NCO content: 1.5%, manufactured by J-Chemical Co., Ltd.) and repaired under the conditions shown in Table 3 using the knife roll coater of FIG.

Further, specific example 11 and comparative example 3 are shown in Table 4.

<Specific Example 11>
Three defect recesses with a diameter of 10 mm and a depth of 2.3 mm were created on the surface of 12 mm 5 ply Nanyang plywood (width 1 scale, length 3 scale, moisture content 8%, material temperature 23 ° C.), urethane resin: HP-820 ( NCO content: 1.5% (manufactured by J-Chemical Co., Ltd.), the present invention was repaired under the conditions shown in Table 4 using the squeeze coater of FIG.

<Comparative Example 3>
Three defect recesses with a diameter of 10 mm and a depth of 2.3 mm were created on the surface of 12 mm 5 ply Nanyang plywood (width 1 scale, length 3 scale, moisture content 8%, material temperature 23 ° C.), urethane resin: HP-820 ( NCO content: 1.5% (manufactured by J-Chemical Co., Ltd.) and repaired under the conditions shown in Table 4 using a hot roll coater.

Table 5 is Comparative Examples 4-7.

<Comparative example 4>
12 mm 5 ply Nanyang wood plywood (width 1 length, length 3 length, moisture content 8%, material temperature 23 ° C.) on the surface, three defective recesses with a diameter of 10 mm and a depth of 2.3 mm are created, and the temperature of the holder member and the coating member is set. Repair was performed under the conditions of Example 1 except that the temperature was changed to 60 ° C.

<Comparative Example 5>
12 mm 5 ply Nanyang wood plywood (width 1 length, length 3 length, moisture content 8%, material temperature 23 ° C.) on the surface, three defective recesses with a diameter of 10 mm and a depth of 2.3 mm are created, and the temperature of the holder member and the coating member is set. Repair was performed under the conditions of Example 1 except that the temperature was changed to 260 ° C.

<Comparative Example 6>
12mm 5ply Nanyang wood plywood (width 1mm, length 3mm, moisture content 8%, material temperature 23 ° C) on the surface, create 3 recesses with a diameter of 10mm and a depth of 2.3mm, and apply plate temperature to 5 ° C Repairs were performed under the conditions of Example 1 except for the changes.

<Comparative Example 7>
12mm 5ply Nanyang wood plywood (width 1 length, length 3 length, moisture content 8%, material temperature 23 ° C) on the surface, create 3 recesses with a diameter of 10mm and a depth of 2.3mm, and apply plate temperature to 80 ° C Repairs were performed under the conditions of Example 1 except for the changes.

Table 6 is Comparative Examples 8-11.

<Comparative Example 8>
12mm5ply Nanyang plywood (width 1mm, length 3mm, moisture content 8%, material temperature 23 ° C) on the surface, create 3 recesses with a diameter of 10mm and a depth of 2.3mm, and raise the tempered member temperature to 60 ° C Repairs were performed under the conditions of Example 1 except for the changes.

<Comparative Example 9>
12mm5ply Nanyang plywood (width 1mm, length 3mm, moisture content 8%, material temperature 23 ° C) on the surface, create 3 recesses with a diameter of 10mm and a depth of 2.3mm. Repairs were performed under the conditions of Example 1 except for the changes.

<Comparative Example 10>
12 mm 5 ply Nanyang plywood (width 1 length, length 3 length, moisture content 8%, material temperature 23 ° C.) Create three defect recesses with a diameter of 10 mm and a depth of 2.3 mm on the surface, and the side guide member temperature is 60 ° C. Repairing was performed under the conditions of Example 1 except that the change was made.

<Comparative Example 11>
12 mm 5 ply Nanyang wood plywood (width 1, length 3, moisture content 8%, material temperature 23 ° C.) Creates 3 defect recesses with a diameter of 10 mm and a depth of 2.3 mm on the surface, and the side guide member temperature is 260 ° C. Repairing was performed under the conditions of Example 1 except that the change was made.

Table 7 is Comparative Examples 12-15.

<Comparative Example 12>
12mm 5ply South Seawood plywood (width 1 length, length 3 length, moisture content 8%, material temperature 23 ° C) on the surface, create 3 recesses with a diameter of 10mm and a depth of 2.3mm, the blade thickness is 0.2mm Repairing was performed under the conditions of Example 1 except that the change was made.

<Comparative Example 13>
12 mm 5 ply Nanyang plywood (width 1, length 3, moisture content 8%, material temperature 23 ° C.) Creates three defect recesses with a diameter of 10 mm and a depth of 2.3 mm on the surface, and changes the blade thickness to 7 mm. Repairs were carried out under the conditions of Example 1 except that.

<Comparative example 14>
12mm 5ply Nanyang wood plywood (width 1 length, length 3 length, moisture content 8%, material temperature 23 ° C) on the surface, create three defect recesses with a diameter of 10mm and a depth of 2.3mm, and the inclination angle of the laying member Repair was performed under the conditions of Example 1 except that the angle was changed to 5 °.

<Comparative Example 15>
12mm 5ply Nanyang wood plywood (width 1 length, length 3 length, moisture content 8%, material temperature 23 ° C) on the surface, create three defect recesses with a diameter of 10mm and a depth of 2.3mm, and the inclination angle of the laying member Repair was performed under the conditions of Example 1 except that the angle was changed to 85 °.

Table 8 shows specific example 12 and comparative examples 16-18.

<Specific Example 12>
12mm 5ply Nanyang wood plywood (width 1 length, length 3 length, moisture content 8%, material temperature 23 ° C) on the surface, create three defect recesses with a diameter of 10mm and a depth of 2.3mm, and the material of the blade is phenol resin Repairs were performed under the conditions of Example 1 except for the changes.

<Comparative Example 16>
12mm 5ply South Seawood plywood (width 1 length, length 3 length, moisture content 8%, material temperature 23 ° C) on the surface, create 3 recesses with a diameter of 10mm and a depth of 2.3mm, and change the blade material to duralumin Repairs were carried out under the conditions of Example 1 except that.

<Comparative Example 17>
12mm 5ply Nanyang wood plywood (width 1 length, length 3 length, moisture content 8%, material temperature 23 ° C) on the surface, create three defect recesses with a diameter of 10mm and a depth of 2.3mm, and the inclination angle of the laying member Repair was performed under the conditions of Example 1 except that the angle was changed to 5 °.

<Comparative Example 18>
12mm 5ply Nanyang wood plywood (width 1 length, length 3 length, moisture content 8%, material temperature 23 ° C) on the surface, create three defect recesses with a diameter of 10mm and a depth of 2.3mm, and the inclination angle of the laying member Repair was performed under the conditions of Example 1 except that the angle was changed to 85 °.

Next, the composition was heated and mixed at 120 ° C. with the formulation shown in Table 9 to prepare a coating agent. Thereafter, the intended coated plate was repaired using the coating agent.
In addition, the composition used here is as follows.
Urethane resin: HP-820 (NCO content: 1.5%, manufactured by J-Chemical Co., Ltd.)
Acrylic resin: A-001 (J-Chemical Co., Ltd.)
Tackifier: YS Polyster S145 (manufactured by Yasuhara Chemical Co., Ltd.)
Wax: Hi-Mic 2095 (Nippon Seiki Co., Ltd.)
Plasticizer: Dioctyl phthalate surfactant: Nopco 8034 (manufactured by San Nopco)
Filler: Escalon 200 (manufactured by Sankyo Seimitsu Co., Ltd.)
Curing agent: K-1600 (NCO content: 33%, manufactured by J-Chemical Co., Ltd.)
Urethane resin: HP-821 (NCO content: 1.5%, manufactured by J-Chemical Co., Ltd.)

Next, specific examples 13 to 18 are shown in Table 10.

Further, Specific Example 19 and Comparative Examples 19 to 22 are shown in Table 11.

1 Knife coater (blade)
DESCRIPTION OF SYMBOLS 1a Retaining bolt 1b Blade pressing cylinder 2 Holder member 2a Horizontal shaft 2b Heating means 2c Pre-filling auxiliary member 3 Feeding member 3a Inclined surface 3b Bottom surface portion 3d Blocking plate 3d Overlapping prevention warp jig 3e Heating means 4 Coating agent supply means 5 Side guide 11 Roll knife coater (comma coater)
11a Heating means 21 Squeeze coater (squeeze roll)
21a Heating means F Coating agent supply port P Plate to be coated S Gap

Claims (24)

In a method of applying a coating agent to the surface of a plate to be coated using a coating member, a holder member that holds the coating member so as to be elastically pressed against the surface of the plate to be coated, and upstream of the coating member The laying member is installed at an interval, and an inclined surface is provided on the application member side of the laying member, and the coating agent is supplied and dropped on the inclined surface so that the temperature of the inclined surface and the application member can be adjusted. The coating agent is applied to the surface of the plate to be coated by applying the coating agent by applying pressure to the surface of the plate to be coated by the coating member while maintaining the fluidity of the supplied coating agent by heating. Method. The board to be coated is any one of a wooden board, an inorganic board, an inorganic fiber board, and a foam, and the coating member heats the knife coater to 70 to 250 ° C with a knife coater. The coating method of the coating agent to the to-be-coated board surface of description. The coating agent supplied to the surface of the plate to be coated falls within a range of 5 seconds to 30 minutes, an open time of 5 seconds to 30 minutes, and a tack free time of 5 seconds to 18 hours in an atmosphere at 20 ° C. The method for applying a coating agent to the surface of a plate to be coated according to claim 1 or 2, wherein the coating agent has performance and is applied while being heated by a heated knife coater. 4. The plate to be coated according to claim 1, wherein the surface of the plate to be coated is heated to 10 ° C. to 60 ° C. in advance by bringing the bottom surface portion of the laying member close to or in contact with the surface of the plate to be coated. Application method of the coating agent on the surface. 5. The method for applying a coating agent to the surface of a plate to be coated according to claim 1, wherein the supporting member is heated to 70 to 250 [deg.] C. A side guide member with heating means installed on both sides of the plate to be coated is heated to 70 to 250 ° C. across the holder member and the application member from the holder member and the application member, which have a pre-fill auxiliary member capable of pre-filling the defective portion. The coating method of the coating agent to the to-be-coated board surface of Claim 1, 2, 3, 4 or 5. The said coating agent is solid at 40 degrees C or less, this coating agent is heat-melted, and it supplies and discharges, The application | coating to the to-be-coated board surface of Claim 1, 2, 3, 4, 5 or 6 characterized by the above-mentioned. Agent application method. The coating agent is one or more of urethane resin, low density and high density polyethylene resin, polyolefin resin, epoxy resin, acrylic resin, vinyl acetate resin, ethylene-vinyl acetate copolymer resin, formalin resin The coating method of the coating agent to the to-be-coated board surface of Claim 1, 2, 3, 4, 5, 6 or 7 characterized by the above-mentioned. The coating agent is one or more of urethane resin, low density and high density polyethylene resin, polyolefin resin, epoxy resin, acrylic resin, vinyl acetate resin, ethylene-vinyl acetate copolymer resin, formalin resin Is a coating agent obtained by blending any one or more of tackifier, wax, plasticizer, surfactant, filler, and curing agent with a base resin blended with The method for applying a coating agent to the surface of a plate to be coated according to claim 1, wherein the viscosity in the molten state is 1 Pa · s to 1000 Pa · s. . At least one of the base resins blended in the coating agent is a moisture curable urethane resin having an NCO content of 1% or more, and the moisture curable urethane resin having an NCO content of 1% or more is 0.5 to 50 in the coating agent. The coating method of the coating agent to the to-be-coated board surface of Claim 1, 2, 3, 4, 5, 6, 7, 8 or 9 characterized by mix | blending weight%. The coating agent blends a curing agent, and at least one of the curing agents is a compound having an NCO content of 30% or more, and the compound having an NCO content of 30% or more is blended in the coating agent by 0.5 to 50% by weight. The coating method of the coating agent to the to-be-coated plate surface according to claim 1, 2, 3, 4, 5, 6, 7, 8, 9 or 10. In an apparatus for applying a coating agent to the surface of a plate to be coated using a coating member, the coating member for feeding the plate to be coated and the coating member so as to elastically press the coating member against the surface of the plate to be coated A holder member for holding the coating member, a supporting member installed at a distance upstream from the application member, and an application for supplying and dropping the coating agent on an inclined surface provided on the application member side of the supporting member A heating means for heating the coating member is provided on the holder member, and a heating means for heating the inclined surface is provided on the support member, thereby maintaining the fluidity of the coating agent. A device for applying the coating agent to the surface of the plate to be coated, which allows the coating agent to be pressurized and applied. 13. The coating device for applying a coating agent on the surface of a plate to be coated according to claim 12, wherein a blocking plate is provided on the laying member. 14. The apparatus for applying a coating agent to the surface of a plate to be coated according to claim 12 or 13, wherein the supporting member is provided with a warp jig for preventing overlap. 15. A side guide with a heating means is provided as an alignment member for improving accuracy of straightness and right angle from both sides of the plate to be coated from the coating member to the supporting member. A device for applying a coating agent to the surface of the plate to be coated. 16. The apparatus for applying a coating agent to the surface of a coated plate according to claim 12, wherein the coating member is a knife coater, the tip is a blade, and the blade thickness is 0.3 to 5 mm. . 16. The apparatus for applying a coating agent to the surface of a plate to be coated according to claim 12, wherein the coating member is a knife coater and the tip is curved or semicircular. 16. The apparatus for applying a coating agent to the surface of a plate to be coated according to claim 12, wherein the coating member is a knife coater and the tip is cut into a circle. 16. The apparatus for applying a coating agent to a surface of a plate to be coated according to claim 12, wherein the coating member is a knife coater and the tip is a triangle. 16. The apparatus for applying a coating agent to the surface of a plate to be coated according to claim 12, wherein the coating member is a knife roll coater. 16. The apparatus for applying a coating agent to a surface of a plate to be coated according to claim 12, wherein the coating member is a squeeze coater. The angle of the inclined surface of the said laying member is formed in 15-75 degrees, The to-be-coated board surface of Claim 12, 13, 14, 15, 16, 17, 18, 19, 20 or 21 characterized by the above-mentioned. Coating agent coating equipment. The knife coater is made of uniformly hardened steel, and the coating agent on the coated plate surface according to claim 12, 13, 14, 15, 16, 17, 18, 19, 20, 21 or 22. Coating device. The distance from the contact point between the tip of the knife coater and the coated plate surface to the lower end of the inclined surface of the laying member is 10 to 300 mm. , 20, 21, 22 or 23. A device for applying a coating agent to the surface of a plate to be coated.