JPS60182913A - Panel for furniture and its production - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a furniture board in which a decorative paper is smoothly adhered to the surface of a substrate having a finely uneven surface, and a method for manufacturing the same.

Conventionally, Japanese Patent No. 467738 is known as a method for manufacturing a decorative board in which decorative paper is adhered smoothly to the surface of lauan plywood.

However, with this method, the conduit hole recesses are raised with only thin paper, and after being used for furniture, it repeatedly absorbs moisture and dries.
In addition, since the plywood of the board also moves rapidly, the decorative paper will tear at the conduit holes over time, and it will be easily scratched and unsightly. Decorative plywood is also known (Patent No. 654009) in which grain pattern printed decorative paper is pasted along the recesses, but since the printed pattern of the decorative paper and the recesses do not match, the wood grain pattern is It was unnatural and undesirable.

The present invention solves the above-mentioned drawbacks, and although the surface of the substrate has minute irregularities, it has a smooth decorative surface and does not deteriorate over time due to moisture absorption, dryness, etc. An object of the present invention is to provide a furniture board that does not cause scratches and is not easily scratched, and a method for manufacturing the same.

That is, in the present invention, the physical properties of the decorative paper are such that the hygroscopic expansion coefficient is 01 to 4, the water absorption expansion is 10 to 10, and the drying shrinkage is 02 to 1. Then, a water-soluble adhesive or, if necessary, an extender pigment is added to the substrate with a finely uneven surface, and the two are bonded together using a pressure heating plate or a pressure heating roll.
Once the adhesive penetrates and expands from the back side of the decorative paper, it is cured and fixed from the adhesive layer on the back side of the decorative paper, and then the adhesive in the recesses is dried. Nevertheless, the decorative paper is smooth and firmly attached.

The details will be explained below.

First, using thin paper as a base, we apply sealer treatment, base coat, base printing, pattern printing, top coat, etc. as necessary to achieve a moisture absorption expansion rate of 01 to 4 degrees, a water absorption expansion rate of 10 to 10%, and a dry shrinkage rate. A decorative paper is formed by adjusting the ratio to 02% to 110%. Considering the penetration of the adhesive during pasting, it is necessary to perform all of the above treatments from one side of the thin paper.

The resin paints, inks, etc. used may be those commonly used, such as aminoalkyte resins, nitrocellulose resins, acrylic resins, urethane resins, and the like.

Although it is possible to obtain properties similar to those described above even if the paper is thick, thin paper is generally used for economic reasons, so it is strengthened by applying resin paint etc. There is a need.

If the properties of the decorative paper are within the range of hygroscopic expansion rate o1%, water absorption expansion rate 1° chill hygroscopic expansion rate 40, water absorption expansion rate 10.0%, the moisture in the adhesive on the substrate surface can be When it is pressed with a pressurized heating roll, some expansion occurs, especially on the back surface of the decorative paper, and it can also be bonded to the adhesive press-fitted into the recesses of the substrate.

If the moisture absorption and water expansion coefficients are below, the adhesive in the recess will be uneven, and some parts will not be bonded.
If the water absorption expansion is higher than this, the surface cannot be made smooth when dried and wrinkles will appear, which is not preferable.

If the drying shrinkage rate is less than 02%, recesses will remain even after adhesion, and if it is more than 110%, the decorative paper will tear and the coating film will be destroyed.

However, it is necessary that the shrinkage caused by shrinkage due to drying is greater than the elongation of the decorative paper caused by the synergistic effect of the hygroscopic expansion coefficient and the water absorption expansion coefficient.

Substrates with minutely uneven surfaces include lauan plywood, fiberboard,
Particle board, inorganic board, etc.

These substrates are, for example, lauan plywood, in which small recesses are formed by conduit holes scattered over the entire surface, and the recesses in this case are 1131"/
, n or less, usually α engineering to 03 m/, about 1.

Alternatively, it may be a rough siding trace used to regulate the thickness of hardboard or particle board.

As the adhesive for pasting the decorative paper, known adhesives such as urea resin, urea melamine resin, urea vinyl acetate resin, vinyl acetate resin, ethylene vinyl acetate resin, etc. may be used. Extender pigments such as titanium oxide, calcium carbonate, silica, and clay are added to reduce volume shrinkage when the adhesive dries, and to make the color of the substrate less susceptible to cosmetic surfaces. It's okay. The amount of extender pigment to be added to the adhesive is preferably in the range of 3 to 20. If the amount is less than 3, the above purpose cannot be achieved, and if it is more than 20%, the adhesive may not enter the recesses of the substrate or flow. It is not preferable because it reduces the properties and makes it impossible to apply it uniformly. Generally, the drying shrinkage rate of each of the above adhesives is about 10 to 35%, so the amount of extender pigment added and the resin percentage of the adhesive should be adjusted by taking into account the size of the irregularities on the substrate surface and the properties of the decorative paper. It can also be adjusted by making changes.

As a pasting device for decorative paper, a pressure heating plate or a pressure heating roll is used.

First, the adhesive is applied to the surface of the substrate using a roll coater 1 reverse coating coater or the like. In the case of spray coating, flow coater, etc., a device for press-fitting into the recesses on the substrate surface is required. After application, air may be blown using a dryer to adjust the amount of moisture in the adhesive. The decorative board is placed on the surface of the substrate coated with the adhesive so that the back side of the decorative board matches the adhesive surface, and is adhered using a pressure heating plate. In addition, when applying decorative papers continuously, the decorative papers are overlapped with a pressure/heat roll so that the back side matches the adhesive surface, and the paper is pasted one after another with a pressure/heat roll. This pressure heating roll is composed of one roll with a large diameter or a set of several rolls with a small diameter, and is pressed one after another. It should be noted that it is not possible to adhere the surface smoothly by mere pressure bonding (at room temperature).

By applying pressure and heating using a pressure heating plate or a pressure heating roll, a portion of the moisture in the adhesive is vaporized,
Together with the moisture in the adhesive, it permeates from the back side of the decorative paper, causing the back side of the decorative paper to particularly expand, adhere to and integrate with the adhesive press-fitted into the recess, and then be pressed together with a pressurized heating plate or pressurized heating roll. In particular, the adhesive hardens first on the back side of the decorative paper and then hardens inside the recesses, so the decorative paper shrinks and becomes smooth, and the recessed areas of the decorative paper are further strengthened by the adhesive, making it easier to paste. The installation is complete.

As described above, according to the present invention, decorative paper can be adhered smoothly even to a substrate having a minutely uneven surface.
Even in the fourth part, the decorative paper is reinforced with adhesive, so the substrate and decorative paper are integrated into one piece, improving durability against drying, shrinkage and expansion due to moisture absorption, and has excellent properties such as very little change over time. Decorative laminates for furniture can be obtained through a simple process.

Patent applicant procedural amendment May 25, 1985 1. Indication of the case Patent application No. 37625 of 1988 2. Name of the invention Furniture board and its manufacturing method 3. Person making the amendment Relationship to the case Patent applicant Full text of the specification 5, Amendment description J Name of the invention Furniture board and method for manufacturing the same 2, Claims (1) Moisture expansion coefficient 0.1 to 4.0, drying shrinkage rate 0.2
- Scrap modification - Decorative paper made of 11.0% is smoothly adhered to the surface of a substrate having a rough uneven surface using a water-soluble adhesive or a water-soluble adhesive to which an extensifying pigment is added if necessary. 9. A furniture board in which the back surface of the decorative paper, which becomes smooth in the concave portions of the substrate, is impregnated and strengthened with the adhesive.

(2) Hygroscopic expansion coefficient 0.1-4.0, drying shrinkage rate 0.2
A decorative paper consisting of ~11.0% is formed by applying a resin paint etc. to thin paper in advance, and then applied to the surface of a substrate having a micro-irregular surface with a water-soluble adhesive or a water-soluble adhesive to which an extender pigment is added if necessary. is applied so as to be press-fitted into the minute irregularities, and the decorative paper is superimposed on the surface of the substrate and adhered with a pressure heating plate or a pressure heating roll, and an adhesive layer on the back side of the decorative paper is applied. A method for producing a furniture board, in which the decorative paper is adhered smoothly by curing.

3. Detailed Description of the Invention The present invention relates to a furniture board in which a decorative paper is smoothly adhered to the surface of a substrate having a finely uneven surface, and a method for manufacturing the same.

Conventionally, Japanese Patent No. 467738 is known as a method for manufacturing a decorative board in which decorative paper is adhered smoothly to the surface of lauan plywood.

However, in the decorative board obtained by this method, the conduit hole concave part of the substrate is raised only by the decorative paper, and after the decorative board is used for all furniture, the decorative paper made of thin paper repeatedly absorbs moisture and dries.
! The plywood used as the substrate also moves rapidly as it absorbs moisture and dries, so over time the decorative paper would tear at the conduit holes and was easily scratched, making it unsightly.

Additionally, decorative plywood is known (Patent No. 654009) in which decorative paper printed with a wood grain pattern is pasted along the recesses of the conduit holes using the conduit holes on the surface of the lauan plywood. Since the conduit hole concave portion of the board does not match, the wood grain pattern becomes unnatural and undesirable.

The present invention solves the above-mentioned drawbacks, and although the surface of the substrate has minute irregularities, the surface of the decorative board has a smooth decorative surface, and even with moisture absorption, drying, etc. An object of the present invention is to provide a furniture board that does not deteriorate and is not easily scratched, and a method for manufacturing the same.

That is, the present invention has physical properties as a decorative paper such that the moisture absorption expansion rate is 0.1 to 4%, the drying shrinkage rate is 0.2 to 11 inches, and if necessary, the water absorption expansion rate is 1.0 to 1. A resin paint or the like is applied in advance to a thin paper with a thickness of 10 cm, and then a water-soluble adhesive or a water-soluble adhesive to which an extender pigment is added as necessary is applied to the substrate with minute irregularities. When pasted with a pressure heating plate or a pressure heating roll, the adhesive penetrates from the back side of the decorative paper, hardens and fixes from the adhesive layer on the back side of the decorative paper, and then the adhesive in the recesses Because it is cured and dried, the decorative paper is smooth and firmly adhered to the substrate even though the surface has minute irregularities.

The details will be explained below.

First, a thin paper is used as a paste, and a sealer treatment, base coat, base printing, pattern printing, top coat, etc. are combined as necessary to achieve a moisture absorption expansion rate of 0.1 to 4.0%, preferably 0.1 to 1.0%. Drying shrinkage rate 0.2~,11.0%
The decorative paper is preferably adjusted to 0.2 to 1.5%. Considering the penetration of the adhesive during pasting, it is necessary to perform all of the above nine treatments from one side of the thin paper.

The resin paints, inks, etc. used may be those commonly used, such as aminoalkyd resins, nitrocellulose resins, acrylic resins, and urethane resins.

Also, even if the paper thickness is thick, properties similar to those described above can be obtained, but for economic reasons, thin paper is generally used, so it is necessary to apply resin paint etc. to strengthen it. There is.

The properties of decorative paper are hygroscopic expansion coefficient of 0.1% to hygroscopic expansion coefficient of 4.0
%, when the moisture in the adhesive on the surface of the board is pressed with a pressure heating plate or a pressure heating roll, it will expand to some extent, especially on the back side of the decorative paper, and the inside of the recess of the board will expand. Adhesives press-fitted into can be bonded together.

If the coefficient of hygroscopic expansion is less than 1%, the adhesive inside the recess will be uneven and some parts will not adhere, and if the coefficient of hygroscopic expansion is 4.0 or more, the surface will be smooth when dry. This is undesirable because it does not allow for smoothing and wrinkles appear.

If the drying shrinkage rate is 082% or less, a depression will remain even after bonding, and if the drying shrinkage rate is 11.0% or higher,
If the decorative paper is torn, the coating film may be destroyed.

However, the elongation of decorative paper caused by moisture absorption and expansion can also be avoided.
It is necessary that the shrinkage caused by shrinkage due to drying be larger.

Substrates with minutely uneven surfaces include lauan plywood, fiberboard,
Particle board, inorganic board, etc.

These substrates are, for example, lauan plywood, in which small recesses are formed by conduit holes scattered over the entire surface. ~0.3 m/m. Alternatively, it may be a round siding mark used to regulate the thickness of hardboard or particle board.

The adhesive for pasting the decorative paper may be a known adhesive such as urea resin, urea melamine resin, urea vinyl acetate resin, vinyl acetate resin, or ethylene vinyl acetate resin. Extender pigments such as titanium oxide, calcium carbonate, silica, and clay are added to reduce volume shrinkage when the adhesive dries, and to make the color of the substrate less susceptible to cosmetic surfaces. It's okay. It is preferable to add the extender pigment in an amount of 3 to 20% based on the adhesive.If it is less than 3%, the above purpose cannot be achieved, and if it is more than 20%, the adhesive will enter the recesses of the substrate, and it will not flow. It is not preferable because it reduces the properties and makes it impossible to apply it uniformly. Generally, the volumetric shrinkage rate of each of the above adhesives upon drying is approximately 10 to 35%, so the amount of extender pigment added to the adhesive and the resin It can also be adjusted by changing the rate.

As the decorative paper pasting device, a pressure heating plate or a pressure heating roll is used.

First, the adhesive is applied to the surface of the substrate using a roll coater, reverse coating coater, or the like. In the case of spray coating, flow coater, etc., a device for press-fitting into the recesses on the substrate surface is required. After application, air may be blown with a dryer to adjust the moisture content in the adhesive. The decorative board is placed on the surface of the substrate coated with the adhesive so that the back side of the decorative board matches the adhesive surface, and is adhered using a pressure heating plate. ! In addition, when pasting decorative paper continuously,
Lay the decorative papers on top of one another using a pressurized and heated roll so that the back side matches the adhesive side, and adhere them one after another using a pressurized and heated roll. This pressure heating roll is composed of one roll with a large diameter or a set of several rolls with a small diameter, and is pressed one after another. It should be noted that it is difficult to adhere the surface smoothly by mere pressure bonding (at room temperature).

By applying pressure and heating using a pressure heating plate or a pressure heating roll, a portion of the moisture in the adhesive is vaporized,
Together with the moisture in the adhesive, it permeates from the back side of the decorative paper, causing the back side of the decorative paper to particularly expand, adhere to and integrate with the adhesive press-fitted into the recess, and then be pressed together with a pressurized heating plate or pressurized heating roll. In particular, the adhesive hardens first on the back side of the decorative paper and then hardens inside the recesses, so the decorative paper becomes smooth and smooth, and the recessed areas of the decorative paper are strengthened by the adhesive, making it easier to stick. Complete.

As described above, according to the present invention, decorative paper can be adhered smoothly even to a substrate having a minutely uneven surface.
Even in the recessed areas, the decorative paper is reinforced with adhesive, so the substrate and the decorative paper work together as one, improving durability against shrinkage and expansion due to drying, moisture absorption, and very little change over time. Furniture decorative laminates can be obtained through a simple process.

patent applicant Japan Printed and Colored Plywood Industry Association Representative Tetsuo Inakatsu

Claims (2)

[Claims] (1) Moisture expansion coefficient: 01-40cm, water absorption expansion coefficient: 10-1
Decorative paper with a drying shrinkage rate of 02 to 110 inches,
The surface of the decorative paper, which has a finely uneven surface, is adhered smoothly using a water-soluble adhesive or, if necessary, an extender pigment is added to the adhesive. Furniture board reinforced with adhesive. (2) Moisture expansion rate 01-40%, water absorption expansion rate 10-10
0%. Decorative paper with a drying shrinkage rate of 02 to 110% is formed by applying resin paint etc. to thin paper in advance, and then applied to the surface of a substrate having a micro-irregular surface with a water-soluble adhesive or, if necessary, an extender pigment to the adhesive. The decorative paper is applied so as to be press-fitted into the fine irregularities, and is adhered using a pressure heating plate or a pressure heating roll, and is cured from the adhesive layer on the back side of the decorative paper, so that the decorative paper is adhered smoothly. Then, the method for manufacturing a furniture board comprises curing the adhesive in the recess.