JP2009249476A - Blending method of adhesive and manufacturing method of woody decorative sheet using adhesive blended by using blending method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide the manufacturing method of a woody decorative sheet by which manufacturing efficiency is enhanced by reducing material loss and shortening time when blending specification of an adhesive is changed. <P>SOLUTION: When optimum amounts of main agent 5, a reinforcing agent 6 and a coloring agent 7 are blended to form an adhesive 8, the main agent 5 is stored in a first tank 1 having a large volume, the reinforcing agent 6 and the coloring agent 7 are stored in a second tank 2 having a volume smaller than that of the first tank and a prescribed amount of the main agent 5 taken out from the first tank 1 and a prescribed amount of the mixture of the reinforcing agent 6 and the coloring agent 7 taken out from the second tank 2 are introduced to a third tank 3 having a volume smaller than that of the first tank and mixed and stirred. When the blending specification of the adhesive 8 is changed, what is necessary is just to discard materials remaining in the second and the third tanks 2 and 3 and thereby time required for discarding and treatment is shortened. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention uses a blending method of the respective agents in an adhesive obtained by blending an appropriate amount of the main agent and an enhancer to which a colorant is added as necessary, and an adhesive blended by the blending method. The present invention relates to a method for producing a wooden decorative board.

  A decorative veneer is attached to the surface of a wooden substrate to form a wooden decorative plate. It does not occur when the decorative veneer has a thickness exceeding 1 mm, but in the case of a thin-cut veneer veneer having a thickness of about 1 mm or less, the adhesive applied to the surface of the wooden substrate is stuck. May ooze out to the surface from the conduit part of the decorative veneer. The colorant is applied to the surface of the attached decorative veneer, but when the colorant is applied to the thin veneer veneer veneer where the adhesive has exuded, the colorant will repel at the area where the adhesive has exuded. Will be lost.

  In order to solve the inconvenience, an adhesive to which a colorant having the same color as or similar to the colorant to be applied to the surface of the decorative veneer is added as an adhesive is used. Patent Document 1 or Patent Document 2 describes the production of a wooden decorative board.

Japanese Patent Publication No. 60-48334 Japanese Patent Publication No. 3-4028

  By using the manufacturing method described in Patent Document 1 or Patent Document 2, even if the colorant applied to the decorative veneer is shed at the location where the adhesive has exuded, it is applied to the exuding adhesive. Because it has a color similar to that of the colorant, it does not give the viewer a feeling of color loss.

  On the other hand, in the actual production of wooden decorative boards, there are a wide variety of production varieties, and in the same production line, the hue of the colorant (for example, dark color system) applied to the applied decorative veneer at a relatively short interval. It may be necessary to change the color scheme. In such a case, for example, when the colorant to be applied is changed from a dark color system to a light color system, the adhesive used for adhering the decorative veneer is an adhesive with a dark color system as it is. If it is used, it is not preferable because the color of the color applied to the decorative veneer is changed at the same time as the color of the adhesive applied to the adhesive veneer because the portion of the adhesive has a different hue depending on the adhesive that has oozed out from the duct of the decorative veneer. It is necessary to change the agent to the same one.

  Such a change in the adhesive specification requires a disposal operation of the adhesive remaining in the storage tank and a cleaning operation of the storage tank, and the adhesive specification is changed during the production process of the wood decorative board. This is causing loss of materials and production time, and there is a need for improvement.

  The present invention has been made in view of the circumstances as described above. Even when it is necessary to change the specifications of the adhesive during production, the material is less wasted and shorter than before. Disclosed is a more improved method of blending an adhesive, which can be performed in a time, and as a result, improving production efficiency, and a method for manufacturing a wooden decorative board using an adhesive blended by the blending method This is the issue.

  The first aspect of the method for blending an adhesive according to the present invention for solving the above-described problem is a method for blending an adhesive in which an appropriate amount of a main agent and an enhancer to which a colorant is added as necessary are blended. Storing the main agent in a first tank, storing the enhancer in a second tank having a smaller volume than the first tank, a predetermined amount of the main agent taken out from the first tank, and a first A step of storing a predetermined amount of the reinforcing agent taken out from the second tank in a third tank having a smaller volume than the first tank, and a step of stirring and mixing the stored main agent and the reinforcing agent in the third tank. At least. (Claim 1)

  The second aspect of the method for blending an adhesive according to the present invention for solving the above-mentioned problem is a method for blending an adhesive in which an appropriate amount of a main agent and an enhancer to which a colorant is added as necessary are blended. A step of storing the main agent in a first tank, a step of storing the enhancer in a second tank, a small amount of the main agent taken out from the first tank, and a small amount of a enhancer taken out from the second tank. And a step of stirring and mixing the mixture of the main agent and enhancer contained in the third tank in small units (Claim 2).

  Usually, the adhesive used for the production of a wood decorative board or the like is a blend of a main agent and an enhancer (curing agent), and the enhancer is a small amount relative to the amount of the main agent. When used, the amount of colorant is small compared to the enhancer. Conventionally, a main tank and a reinforcing agent added with a colorant as needed are contained in a large tank, for example, in units of 10 Kg, and mixed together by stirring and mixing the required adhesive. When changing the specifications, the adhesive remaining in the tank is discarded, and an adhesive with a new blending specification is made in units of 10 kg. Therefore, waste of material is likely to occur. In addition, after discarding the remaining adhesive, it is necessary to clean the inside of a large tank before blending an adhesive with a new specification, which requires a long cleaning time and a large amount of cleaning water.

  According to the blending method according to the first aspect of the present invention described above, the main agent that requires a large amount but can be used in common even if the specifications are changed is accommodated in the first tank having a large volume. However, the enhancer that is smaller in quantity than the main agent is stored in a second tank having a small volume, for example, about 1/10 or less of the volume of the first tank. Then, when the bonding operation is started, a predetermined amount of the main agent is taken out from the first tank, and a predetermined amount of the reinforcing agent is taken out from the second tank. It introduce | transduces into a 3rd tank with a small volume which is about 10 or less volume, and stirs and mixes there, and prepares the adhesive of the mixing | blending specification actually used.

  Therefore, even when an adhesive with a different formulation is required, a small amount of the reinforcing agent remaining in the second tank and a small amount of the main agent and the reinforcing agent remaining in the third tank. What is necessary is just to discard the adhesive agent which is a thing, and can reduce the loss of material. At the same time, the time required for disposal is shortened. In addition, the second and third tanks have a small volume as compared with the first tank, the time required for cleaning is short, the amount of waste water after cleaning is small, and this is preferable from the viewpoint of environmental conservation.

  In the blending method according to the second aspect of the present invention described above, a small amount of the main agent taken out from the first tank and a small amount of the enhancer taken out from the second tank are accommodated in the third tank, and in small units there. Stir and mix. Even in this case, when an adhesive having a different blending specification is required, a small amount of the adhesive remaining in the third tank may be discarded, and the material loss can be reduced. In the second aspect, the sizes of the first tank, the second tank, and the third tank are arbitrary, and the second tank and the third tank having the same size as the first tank are provided. It may be used. More preferably, the third tank is smaller in volume than the first tank. In this case, there is also an advantage that the time required for cleaning when the specification is changed can be shortened. In the second aspect, the small unit is a small unit compared to the amount in the case of adjusting the adhesive by blending the main agent and the enhancer in the first tank, For example, when the amount when adjusting the adhesive in the first tank is 10, the amount of the mixture of the main agent and the enhancer mixed in the third tank is preferably 1/10 or less. .

  In a preferred embodiment of the method for blending an adhesive according to the present invention, the main agent is a main agent having a high viscosity of 10 Pa · s / 20 ° C. or higher, and the enhancer to which a colorant is added as necessary has a lower viscosity than the main agent. It is an enhancer (Claim 3). By using an enhancer having a viscosity lower than that of the main agent as the enhancer, the viscosity of the blended adhesive can be lowered, and the replacement work in the second and third tanks is further facilitated.

  In the method of blending the adhesive according to the present invention, the adhesive, the enhancer, and the colorant when used are not particularly limited, but as an example, the main agent is one of urea melamine resin, vinyl acetate emulsion resin or acrylic emulsion resin. Or a combination of two or more, wherein the enhancer is one or a combination of two or more water-soluble compounds that are miscible with an aqueous colorant, such as a mixed aqueous solution of urea, glyoxal, and acrylamide. In the above, the colorant may be either an inorganic colorant or an organic colorant (Claim 4).

  When added, examples of the colorant include disazo pigments, condensed azo pigments, carbon black, and petals. When an inorganic colorant containing a metal such as a petal is used as the colorant, the metal and the main agent may react to increase the viscosity of the adhesive. In order to avoid this, when an inorganic colorant is used, it is preferable to use an inorganic colorant that does not contain metals.

  In the method for blending an adhesive according to the present invention, methylene diphenyl diisocyanate (MDI) may be further blended as a blending agent (claim 5). Thereby, the effect of the water resistance improvement after sticking a wood type board | substrate and a decorative veneer is brought about.

  In the method of blending the adhesive according to the present invention, a more preferable aspect is that the main agent is a vinyl acetate emulsion resin having a high viscosity of 40 Pa · s / 20 ° C. or higher, and the reinforcing agent is a low viscosity urea / glyoxal / acrylamide polycondensate mixture. It is an aqueous solution. If necessary, water-insoluble methylene diphenyl diisocyanate (MDI) is further blended (Claim 6). Usually, the main agent has a high viscosity (for example, 10 Pa · s / 20 ° C. or more), and as described above, in order to facilitate the cleaning operation of the second or third tank when the specification is changed, Although it is desirable to add a lower viscosity enhancer, the urea / glyoxal / acrylamide polycondensate mixed aqueous solution described above is particularly suitable as an enhancer to be added because it has a viscosity as low as that of water.

  In the method of blending the adhesive according to the present invention, it is preferable to introduce the reinforcing agent into the third tank at a ratio of 20 parts or less with respect to 100 parts of the main agent, and stir and mix them (claim 7). In this aspect, a smaller tank can be used as the second tank, and the replacement work of the enhancer at the time of specification change can be further accelerated.

  The method of blending an adhesive according to the present invention is an adhesive that blends an appropriate amount of a main agent, an enhancer, and a colorant (including the case where the blending amount of the colorant is 0). The present invention can be applied to any adhesive compounding method used for applications that require a change. One of such examples is an adhesive used when manufacturing a wooden decorative board having a decorative veneer bonded to the surface of a wooden substrate as described above. Therefore, the present invention further relates to a method for manufacturing a wooden decorative board in which a decorative veneer is attached to the surface of a wooden substrate, and the adhesive compounded by the above-described compounding method is applied to the surface of the wooden substrate. A process, a step of sticking a thin veneer veneer veneer having a thickness of 0.1 to 1.0 mm on the surface of a wooden substrate coated with an adhesive, and a colorant on the surface of the veneer veneer A method for producing a wooden decorative board comprising at least a step of applying paint is also disclosed (claim 9).

  In the above method for producing a wooden decorative board, a thin veneer decorative veneer having a thickness of 0.1 to 1.0 mm is used as a decorative veneer to be attached to the surface of the wooden board, and the surface of the wooden board is used. There is a possibility that the color of the adhesive applied on the surface of the adhesive may ooze out to the surface through the conduit portion of the thin veneer veneer. Therefore, it is required to change the color or hue of the colorant added to the adhesive according to the color or hue of the colorant to be applied to the surface of the stuck thin veneer veneer. In the manufacturing method of the present invention, even when it is required to change the blending specifications in a short cycle, as explained in the blending method, there is little material loss, a short processing time, and the environment. The change can be made in a gentle state, and as a result, a wooden decorative board can be manufactured at a low cost.

  In the method for producing a wooden decorative board of the present invention, the wooden substrate is optional and is not particularly limited. A wood fiber board such as plywood or MDF can be used as appropriate. A composite base material of plywood and wood fiber board may be used. Examples of the thin veneer veneer having a thickness of 0.1 to 1.0 mm include oak veneer, teak veneer, sapele veneer, walnut veneer, and the like.

  In the method for producing a wood decorative board according to the present invention, even if no colorant is added, the adhesive has a color or hue equivalent to the color or hue of the colorant applied to the surface of the stuck veneer veneer. If so, it is not necessary to add a colorant.

  In the wood decorative board manufacturing method of the present invention, as described in the adhesive compounding method, the mixture of the enhancer and the colorant is 20 parts or less with respect to 100 parts of the main agent of the adhesive. It is practical and preferred to introduce each into a third tank and mix with stirring. More specifically, as an adhesive, 6 to 10 parts of a mixed solution of urea, glyoxal, and acrylamide polycondensate in which 3 to 5% of an organic colorant is added to 100 parts of vinyl acetate emulsion resin, methylene diphenyl, It is preferable to use an adhesive blended by any of the blending methods described above at a ratio of 10 parts of diisocyanate.

  According to the present invention, when it is necessary to change the specifications of the adhesive during production, the remaining amount of the adhesive does not match the planned production amount, and the remaining adhesive must be discarded. Even when it is not, the amount of adhesive to be discarded can be reduced as much as possible to reduce the waste of material. In addition, the time required for the specification change and the disposal process can be reduced in a shorter time than before, and as a result, the production efficiency can be improved. Further, the amount of water required for cleaning the adhesive storage tank can also be reduced.

  Hereinafter, the present invention will be described based on embodiments with reference to the drawings. FIG. 1 is a schematic diagram for explaining an example of a method for blending an adhesive according to the present invention and a method for producing a wooden decorative board using the same.

  In FIG. 1, 1 is a first tank having a capacity capable of accommodating a main agent of, for example, about 10 kg or more, and 2 is a first tank having a capacity capable of accommodating, for example, about 1 kg of an enhancer and a colorant. The second tank 3 has a small volume, and 3 is a third tank having almost the same size as the second tank 2. The third tank 3 is provided with appropriate stirring means 4.

  The first tank 1 contains a main agent 5 which is, for example, a vinyl acetate emulsion resin having a viscosity of 40 Pa · s / 20 ° C., and the second tank 2 is a urea / glyoxal / acrylamide polycondensation functioning as an enhancer 6. A colorant 7 of about several percent of the product mixture aqueous solution and the enhancer 6 is accommodated. Further, a non-water-soluble MDI is accommodated in a tank different from the second tank 2 (not shown).

  At the start of work, for example, 100 parts of the main agent is taken out from the first tank 1 and sent to the third tank 3, and from the second tank 2, for example, about 6 to 10 parts of the enhancer 6 and the colorant 7 The mixture is sent to the third tank 3, and, for example, about 10 parts of MDI is sent from the other tank to the third tank. A mixture of the main agent 5, the enhancer 6, the colorant 7 and the MDI is stirred and mixed in the third tank 3 and blended as an adhesive 8. The adhesive 8 blended in the third tank 3 is a small amount of about 1 kg. By the apparatus comprising the first to third tanks described above, the method of blending the adhesive according to the present invention is executed.

  In FIG. 1, reference numeral 10 denotes an appropriate transport device, on which a wooden substrate 20 constituting the wooden decorative board A moves. An adhesive application device 11 such as a roll coater is provided in the middle of the conveyance path of the conveyance device 10, and the adhesive applied to the adhesive application device 11 appropriately in the specifications in the third tank 3. 8 is introduced. A wood veneer sticking means 12 and a colorant applying means 13 are disposed downstream of the adhesive applying device 11.

  First, the adhesive 8 is applied by the adhesive applying device 11 to the surface of the wood-based substrate 20 sent on the transport device 10, and then 0.1 to 0.1 by the wood veneer sticking means 12. A 1.0 mm thin veneer veneer 21 is affixed, and if necessary, after hot-pressure molding by a hot press (not shown), on the adhered veneer veneer veneer 21 by the colorant application means 13. Appropriate coating is applied to form the coating film 22, and the wood decorative board A is obtained.

  In the above apparatus, in the manufacturing process of the wood decorative board, as described above, the coloring in the adhesive 8 is performed due to the color of the colorant applied to the surface of the thin veneer veneer 21 by the colorant applying means 13. Assume that the type of agent 7 needs to be changed. When the blending amount of the adhesive 8 is substantially equal to the planned production amount, and the remaining amount is almost zero in both the second tank 2 and the third tank 3 when the adhesive specification is changed. In some cases, a certain amount of material remains. In either case, it is necessary to discard the remaining material and wash the tank with water.

  As described above, in the above blending device, the volumes (volumes) of the second and third tanks are extremely small, for example, 1/10 or less, compared to the volume of the first tank that contains the main agent 5. Therefore, the amount of the adhesive 8 after blending the reinforcing agent 6 and the colorant 7 and the mixture thereof, and the main agent 5 and the mixture, which are to be discarded when the specification is changed, is small. Compared with the embodiment in which the required blending is performed in one tank 1, the amount of material to be discarded is extremely small. In addition, since the amount of disposal is small, the time required for disposal can be shortened. Furthermore, since the thing which added the coloring agent to the enhancer of low viscosity compared with a main ingredient is stored in the 2nd tank different from a 1st tank, the replacement | exchange operation | work in a tank is easy. Furthermore, the volume of the second and third tanks is smaller than the volume of the first tank, and the amount of water required for cleaning can be made sufficiently small compared to the case where the first tank 1 is cleaned. Because of the small amount of waste water, the environmental load is also reduced.

  In the above description, the volume of the second tank 2 and the third tank 3 is about 1/10 of that of the first tank 1, but the size of the second tank 2 and the third tank 3 is large. However, the length may be the same as that of the first tank. However, in that case, in the third tank 3, a small amount of an adhesive, for example, a reinforcing agent added with a small amount of a main agent and a colorant enough to adjust an adhesive 8 of about 1 kg, is added to the first tank 3. From the first tank 2 and the second tank 2.

  Moreover, in said description, with respect to the wooden board | substrate 20 sent on the conveying apparatus 10, the application | coating process of an adhesive agent, the sticking process of the thin veneering veneer 21, and the coloring by the coloring agent application means 13 are carried out continuously. Although the colorant application step is performed, the colorant application unit 13 may be performed by batch processing. It is also recommended to apply a catcher agent for collecting formaldehyde released from the plywood by a roll coater or the like as appropriate.

The schematic diagram explaining an example with the compounding method of the adhesive agent by this invention, and the manufacturing method of a wooden decorative board using the same.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Large tank 1st tank (for main ingredient), 2 ... Small 2nd tank (for enhancer + coloring agent) compared with 1st tank, 3 ... Almost the same size as 2nd tank 3rd tank (for blending) 5 ... Main agent, 6 ... Enhancer, 7 ... Colorant, 8 ... Bonded adhesive, 10 ... Conveyor, 11 ... Adhesive applicator, 12 ... Wood veneer Sticking means, 13 ... colorant applying means, 20 ... wood substrate, 21 ... 0.1 to 1.0 mm thin veneer veneer, 22 ... coating, A ... wood decorative board

Claims (10)

A method of blending an adhesive comprising blending an appropriate amount of a main agent and an enhancer added with a colorant as necessary,
Storing the main agent in a first tank;
Storing the enhancer in a second tank having a smaller volume than the first tank;
Storing a predetermined amount of the main agent taken out from the first tank and a predetermined amount of the enhancer taken out from the second tank in a third tank having a smaller volume than the first tank;
And a step of stirring and mixing the contained main agent and the reinforcing agent in a third tank. A method of blending an adhesive comprising blending an appropriate amount of a main agent and an enhancer added with a colorant as necessary,
Storing the main agent in a first tank;
Containing the enhancer in a second tank;
Storing a small amount of the main agent removed from the first tank and a small amount of the enhancer removed from the second tank in the third tank;
And a step of stirring and mixing the mixture of the contained main agent and enhancer in a small amount in the third tank.   The main agent is a main agent having a high viscosity of 10 Pa · s / 20 ° C or higher, and the enhancer to which a colorant is added as necessary is an enhancer having a lower viscosity than the main agent. 3. A method for blending the adhesive according to 2.   The main agent is one or a combination of urea melamine resin, vinyl acetate emulsion resin or acrylic emulsion resin, and the enhancer is miscible with aqueous colorant such as urea / glyoxal / acrylamide polycondensate mixed aqueous solution. 4. The adhesive according to claim 3, wherein the colorant is one of inorganic water-soluble compounds or a combination of two or more water-soluble compounds, and when used, the colorant is either an inorganic colorant or an organic colorant. Formulation method.   The method of blending an adhesive according to any one of claims 1 to 4, further comprising blending methylene, diphenyl, and diisocyanate as the blending agent.   The adhesive according to claim 4 or 5, wherein the main agent is a vinyl acetate emulsion resin having a high viscosity of 40 Pa · s / 20 ° C or higher, and the enhancer is a mixed aqueous solution of urea, glyoxal, and acrylamide polycondensate. The blending method.   The reinforcing agent according to any one of claims 1 to 6, wherein the reinforcing agent is supplied to the third tank at a ratio of 20 parts or less with respect to 100 parts of the main agent and stirred and mixed. Formulation method.   The method for blending an adhesive according to any one of claims 1 to 7, wherein an enhancer that does not contain a colorant is used as the enhancer. A method for producing a wooden decorative board in which a decorative veneer is attached to the surface of a wooden substrate,
Applying the adhesive compounded by the compounding method according to any one of claims 1 to 8 to the surface of the wooden substrate;
A step of sticking a thin veneer veneer having a thickness of 0.1 to 1.0 mm on the surface of a wooden substrate to which an adhesive is applied;
A process of applying a colorant on the surface of the laminated veneer,
A method for producing a wooden decorative board, comprising:   The urea / glyoxal / acrylamide polycondensate mixed aqueous solution 6 in which 3 to 5% of an organic colorant is added to 100 parts of vinyl acetate emulsion resin as an adhesive used in the method for producing a wood decorative board according to claim 9. The woody makeup according to claim 9, wherein the adhesive is blended by the blending method according to any one of claims 1 to 8 at a ratio of 10 to 10 parts and 10 parts of methylene diphenyl diisocyanate. A manufacturing method of a board.

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