JP3525229B2 - Laminated paper for decorative board - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a laminated paper for decorative boards. More specifically, the present invention relates to a building material for living rooms, bedrooms, etc., a closet, a veneer for a decorative board such as a laminated plywood used in a TV cabinet, and a sanitary room such as a bathroom, a dressing room, and a washroom. The present invention relates to waterproof laminated paper for decorative materials such as laminated plywood used for building materials such as kitchens and kitchen cabinets, and more particularly to laminated paper for decorative boards excellent in V-cut suitability and lapping machine suitability. It is a thing.

[0002]

2. Description of the Related Art Wall boards used in living rooms, bedrooms, etc.,
BACKGROUND ART Various decorative boards are used for door panels, crosspieces, closets, furniture, TV cabinets, etc., as well as wall panels used in sanitary rooms and kitchens, crosspieces, storage panels, kitchen cabinets and the like. In recent years, along with changes in lifestyle and diversification of needs, general decorative boards such as living room, bedroom wall boards, closets, and furniture have a high-class feel, and have a feeling that moisturizes life. High quality products are being demanded. Also, from the viewpoint of total harmony of houses, sanitary rooms where condensation and water can easily get wet, wall boards used in kitchens, crosspieces, cabinet panels, kitchen cabinets, etc., wall boards for living rooms, bedrooms, etc. There is a demand for high-quality products that have the same high-class feel as furniture, etc., and have a feeling that enriches life. Up to now, from wall boards used in living rooms, bedrooms, door panels, crosspieces, closets, furniture, TV cabinets, etc.
For sanitary rooms that require waterproofness, wall boards used in kitchens, crosspieces, storage cabinets, and kitchen cabinets, printing is performed on base materials such as plywood, particle board, and medium-quality fiberboard (MDF). Veneer with laminated vinyl chloride film or V-cut plywood,
Decorative boards that have been wrapped by a wrapping machine are often used. This is because the workability of the V-cut plywood and the curved surface shape processing by the lapping machine is not sufficiently compatible with the decorative paper as described later, the stain resistance of the decorative paper is not sufficient, and the base material of the decorative board is Some particle boards and medium quality fiberboard (MDF) are moisture-proof /
Since it is poorly waterproof, it swells when it absorbs water, and it may curl or mold. In contrast to the fact that it cannot be used, vinyl chloride film has high moisture and water resistance, and has good V-cut suitability.
This is because when laminating to a curved base material, the pressure roll of a lapping machine is often followed. However, the material cost of vinyl chloride film is high,
There are limits to the quality of the ink that can be used for printing, and there is a limit to producing a high-class impression. Further, printing on a vinyl chloride film is performed by a gravure printing method, but in order to prevent the occurrence of troubles due to deterioration of dimensional stability of the vinyl chloride film due to heating in the drying process after printing, printing / printing
Productivity is low because the drying speed must be suppressed and the speed cannot be increased. In addition, there is a drawback that harmful gas is generated during combustion.

By the way, as the veneer paper, (a) a paper having a resin internally added to the base paper to increase the basis weight of the paper to 30 g / m ² , and (b) a resin impregnated during or after the papermaking. (JP-A-63-190092, JP-A-63-1)
90094, etc.) is known. Paper is inexpensive, can use various printing methods, and has a wide range of printing inks that can be used for high-quality printing. It can be bonded to the surface of a substrate made of plywood, particle board, MDF, etc. Is much better than vinyl chloride film. However, when the pressure roll of the lapping machine presses the concave portion of the curved substrate in the laminating process for the curved substrate, cracks, cracks, crevices, etc. occur due to insufficient bending resistance and inter-paper strength. It is easy to fluff or damage due to friction during use as a decorative plate. In addition, it lacks moisture resistance and waterproofness, and even if it is printed on paper and top-coated, water penetrates from the top-coat layer and swells the particle board and MDF, causing curling and mold. To do. Therefore, the conventional veneer paper of this type is merely used as a veneer for a planar shape such as a ceiling by being bonded to a plywood or the like.

As a result of earnest research, the inventor of this application has already invented a pigment-coated paper for a decorative board having good printability (see Japanese Patent Laid-Open No. 4-314538). This is because the surface strength specified by JIS P 8129 is 11 to 25 A and the smoothness specified by JIS P 8119 is 400 seconds or more. The resin component in the paint is permeated into the base paper, and this is calendered and pigment-coated. The paint contains 14 to 20 parts by weight of SBR latex and 5 parts by weight or less of esterified starch per 100 parts by weight of the filler. The main content is that the coating amount is 8 to 25 g / m ² per one side. This pigment-coated paper for decorative plate has good printability and enables high-quality printing, but it cannot be said to have sufficient moisture-proof / water-proof property, bending resistance, and inter-paper strength.

Further, the inventor of the present application, the waterproof coated paper for a decorative plate that can substitute for a film for a decorative plate made of vinyl chloride, that is, excellent in moisture-proof / waterproof property, bending resistance, and inter-paper strength, V We have invented a waterproof coated paper for decorative boards that can be processed by cut plywood and lapping machines (see Japanese Patent Application No. 6-145304). This is JIS
The surface strength specified by P 8129 is 15 to 32A.
And the smoothness specified by JIS P 8119 is 200.
A clear waterproof resin containing no filler is coated on at least one surface of the base paper for at least 2 seconds in a dry weight of 5 to 25 g / m ² , and the clear waterproof resin is at least a soap-free emulsion-polymerized SBR latex. The main content is to be either a soap-free emulsion-polymerized NBR latex or a soap-free emulsion-polymerized MBR latex. This waterproof coated paper for veneer
Although it has V-cut aptitude itself, it does not stretch as much as vinyl chloride film, so V-cut processing must be performed precisely up to the point of waterproof coated paper for decorative boards. The wear resistance of the corners becomes low, and the corners may be cracked or sheared along the seam during use.

[0006]

The present invention was devised in view of the above-mentioned circumstances, and uses inexpensive paper as a material, and is a veneer veneer excellent in V-cut suitability and lapping machine suitability. It is an object of the present invention to provide a slip sheet and a laminated sheet for a decorative board, which is excellent in moisture-proofing / waterproofing, V-cut suitability and lapping machine suitability.

[0007]

[Means for Solving the Problems] The above problem is that at least one of the following pigment-coated paper, clear-coated paper, or inter-paper reinforced paper is used as a top paper, and the inter-paper reinforced paper is pasted to the top paper. (A) Pigment-coated paper having a surface strength of 16 to 32 A specified by JIS P 8129 and a smoothness of 200 seconds or more specified by JIS P 8119 (B) The clear coat paper is JI, which is obtained by applying a paint containing a filler and a binder to the resin composition in the paint to penetrate the base paper and calendering it.
The surface strength specified by SP 8129 is 16 to 32A.
And the smoothness specified by JIS P 8119 is 200.
A clear waterproof resin containing no filler is applied on at least one side of the base paper for at least 2 seconds in a dry weight of 5 to 25 g / m ² , and (C) the inter-paper reinforced paper is
The surface strength specified by JIS P 8129 is 16 to 3
2A, the smoothness specified by JIS P 8119 is 2
It has been achieved by a laminated paper for a decorative board, which is characterized by being 00 seconds or more.

The present invention will be described in detail below. [Base paper] As a material satisfying the conditions of the base paper used in the present invention, a pulp blending ratio; L-BKP is 80 to 100.
%, N-BKP 0 to 20%, freeness; 180 to 3
It is preferable to use one of 50 cc. Freeness of 200 to 310 cc is particularly desirable. N-BKP
When it exceeds 20%, the formation becomes poor, and coating unevenness occurs during coating, resulting in printing unevenness. Also,
When the freeness is less than 180 cc, water drainage and dryness are deteriorated at the time of papermaking, and uneven adhesion of the dryer occurs and uneven gloss occurs. Conversely, the freeness is 35
If it exceeds 0 cc, sufficient interpaper strength cannot be obtained. The freeness should be in the above range from the viewpoint of the penetration of the resin component in the pigment coat paint described below into the base paper, the coatability of the clear waterproof resin liquid described below on the base paper surface, and the balance of the inter-paper strength. Is preferred. Among the chemicals internally added to the pulp liquid, cationized starch, polyacryl amide resin, polyamide epichlorohydrin resin and the like can be used as the paper strengthening agent. In particular, the cationized starch also functions as a wire peeling accelerator. The addition amount is preferably DRY 30 to 65 kg / T,
In particular, in order to increase the inter-paper strength, the addition amount is DRY50-
60 kg / T is desirable. In addition, a size fixing agent such as a sulfuric acid band, a pitch remover, a rosin sizing agent (saponification type, emulsion type), a defoaming agent, and a filler such as titanium oxide can be added to the pulp liquid. The pulp liquor can be produced by a conventional fourdrinier paper machine, twin wire paper machine, or round net paper machine. Then, it is dried by a Yankee dryer or a multi-cylinder dryer to a moisture content of about 4.0%. The base paper has a surface strength of 16 to 32.
A having a smoothness of 200 seconds or more is preferable.

[Pigment coated paper] The surface strength is 16 to
Within the range of 32 A, it has a sufficient strength against the tape peeling strength (paper strength) after cross-cutting in combination with the resin component in the pigment coat paint applied to the base paper. In order to satisfy such tape peeling strength, it is desirable that the base paper has a surface strength of 20 to 32 A. Further, when the smoothness is 200 seconds or more, the resin liquid in the pigment coat paint can be applied uniformly. When the smoothness is less than 200 seconds, uneven coating of the resin liquid occurs, which causes uneven printing later, which is not preferable. The smoothness of the base paper may be a smoothness that allows the resin solution in the pigment coat paint to be uniformly applied to the base paper,
The upper limit is not particularly limited. However,
When using papermaking / dried base paper, it is possible to use the base paper for up to about 500 seconds, which is the technical limit, and for supercalendered base paper, up to 800 seconds can be used. A base paper having a smoothness exceeding this is not preferable because the transferability of the resin liquid to the base paper during coating is poor, and as a result, coating unevenness is likely to occur.

[Clear coated paper] Surface strength is 16 to 3
Within the range of 2A, it has a sufficient strength against the tape peeling strength (paper-to-paper strength) after cross-cutting in combination with the clear waterproof resin coated on the base paper. In order to satisfy such tape peeling strength, it is desirable that the base paper has a surface strength of 20 to 32 A. Also,
If the smoothness is 200 seconds or more, the clear waterproof resin liquid can be applied uniformly. When the smoothness is less than 200 seconds, uneven coating of the clear waterproof resin liquid occurs,
It is not preferable because it may cause uneven printing later. The smoothness of the base paper may be any smoothness that allows the clear waterproof resin liquid to be uniformly applied to the base paper, and the upper limit is not particularly limited. However, when using the papermaking / dried base paper, the technical limit of about 500 seconds can be used, and in the case of the super calendered base paper, it can be used up to 800 seconds. A base paper having a smoothness exceeding this range is not preferable because the transferability of the clear waterproof resin liquid to the base paper during coating is poor and, as a result, coating unevenness is likely to occur.

[Reinforcement between papers] When the surface strength is in the range of 16 to 32A, when it is bonded to pigment-coated paper, clear-coated paper, or inter-reinforcement paper, separation between papers does not occur and V It has sufficient bending resistance even for bending work for cut plywood. In order to satisfy such peel strength and bending resistance, it is preferable that the inter-paper reinforcing paper has a surface strength of 20 to 32 A. If the smoothness is 200 seconds or more, the laminating adhesive can be applied uniformly. If the smoothness is less than 200 seconds, uneven application of the bonding adhesive occurs, resulting in insufficient bonding, which is not preferable. The smoothness of the inter-paper reinforcing paper may be any smoothness that allows the adhesive to be applied uniformly, and the upper limit is not particularly limited. However, when using papermaking / dry base paper, the technical limit is 50
Inter-paper reinforced paper up to about 0 seconds can be used, and in the case of super-calendered inter-paper reinforced paper, up to 800 seconds can be used. The base paper for pigment-coated paper, clear-coated paper, and inter-paper reinforcing paper has a basis weight of 20 to 60 g / m2.
m ² is preferable from the viewpoint of paper strength. Tsubo is 20g / m
^If it is less than ² , unfavorably, the papermaking speed is slowed down, the production cost is increased, and strike-through occurs due to the coating of the adhesive, and if it exceeds 60 g / m ² , the inter-paper strength becomes insufficient, which is not preferable.

Production of Pigment Coat and Clear Coat, and Pigment Coated Paper and Clear Coated Paper [Production of Pigment Coated Paper] The pigment coat paint comprises a filler and a binder. As the filler, clay, light calcium carbonate, calcium bicarbonate, titanium oxide and the like can be used. As a binder, SBR
Those containing 14 to 20 parts by weight of latex and 5 parts by weight or less of esterified starch are preferable. Other paint materials include paper strength agents (PAV, casein, etc.), water resistance agents, lubricants,
A defoaming agent, a water retention agent, a pH adjusting agent, a coloring pigment and the like can be added as appropriate.

The pigment coat paint composed of the above components is supplied and coated on at least one surface of the base paper by a known coating method such as a roll coater method, an air knife coater method, a blade coater method and a bar coater method. Among them, the blade coater method, particularly the tip blade method or the bent blade method is preferable from the viewpoint of smoothness of the coated surface. By such a method, the pigment coat paint is applied to the base paper so that the dry weight is 8 to 25 g / m ² , to obtain the pigment coat paper. If the dry weight of the pigment coat paint is less than 8 g / m ² , the surface of the base paper cannot be uniformly covered and coating unevenness occurs, resulting in insufficient printability and paper-to-paper strength. On the other hand, when it exceeds 25 g / m ² , the drying property after coating is deteriorated, the coating speed is slowed down, and the cost is increased. If necessary, a known oxidized starch for curling prevention, a preservative, and a water-proofing agent can be coated on the back surface of the base paper. As a matter of course, the pigment coat paint may be applied on both sides. When printing gloss is required, it is preferable to apply a super calendar treatment. The nip pressure of the super calendar or the number of nip steps can be changed appropriately depending on the required glossiness.
The nip pressure is preferably 145 to 250 kg / cm, and the number of nip steps is preferably 5 or more.

[Production of Clear Coated Paper] As a clear waterproof resin, at least soap-free emulsion polymerization SB
Any of R latex, soap-free emulsion-polymerized NBR latex, and soap-free emulsion-polymerized MBR latex can be used. Soap-free emulsion polymerization refers to polymerization in which a reactive emulsifier is used and the emulsifier reacts with the polymer produced at the end of the emulsion polymerization and is incorporated into the polymer molecule. For soap-free emulsion polymerization of latex, it is preferable to use a reactive allyl alcohol derivative emulsifier. By using soap-free emulsion-polymerized SBR latex, soap-free emulsion-polymerized NBR latex, and soap-free emulsion-polymerized MBR latex, moisture-proof and waterproof functions can be imparted. On the other hand, soap-free emulsion-free SB
In R latex, NBR latex, and MBR latex, an emulsifier is present and absorbs water, so that the moisture-proof and waterproof functions are not sufficient, which is not preferable. Further, as the clear waterproof resin, at least internally cross-linked SBR
Latex, internally crosslinked NBR latex, internally crosslinked MBR latex, self crosslinked SBR latex, self crosslinked NBR latex, self crosslinked MB
Any of R latex can also be used.
The internally cross-linked SBR latex, the internally cross-linked NBR latex and the internally cross-linked MBR latex can be obtained by internally cross-linking the SBR latex, the NBR latex and the MBR latex with an internal cross-linking agent. By the internal cross-linking, the internal density of the polymer can be increased (increased in molecular weight) to suppress swelling in water and improve the moisture-proof / water-proof function. Divinylbenzene (DVB) is preferably used as the internal cross-linking agent. In addition, self-crosslinked SBR latex, self-crosslinked NBR latex, self-crosslinked MBR latex are SBR latex, NBR latex, MB
It is obtained by self-crosslinking the R latex with a self-crosslinking agent. The self-crosslinking agent can accelerate the film formation by causing a crosslinking reaction during film formation, thereby improving the moistureproof / waterproof function. As a self-crosslinking agent,
N-methylol acrylamide (n-MAM) and glycidyl methacrylate (GMA) are preferable. These clear waterproof resins can be used alone or in combination, and are appropriately determined according to the required quality (paper strength, bending strength, etc.) of the target product. Further, when it is necessary to improve weather resistance and opacity, an ultraviolet absorber and / or titanium is added to a clear waterproof resin liquid for coating.

The clear waterproof resin liquid composed of the above is supplied and coated on at least one side of the base paper by a known coating method such as a roll coater method, an air knife coater method, a blade coater method or a bar coater method. It Among them, the blade coater method, particularly the tip blade method or the bent blade method is preferable from the viewpoint of smoothness of the coated surface. By such a method, the clear waterproof resin is applied to the base paper so that the dry weight becomes 5 to 25 g / m ² , to obtain a clear coated paper. If the dry weight of the clear waterproof resin is less than 5 g / m ² , the surface of the base paper cannot be uniformly covered and coating unevenness occurs, resulting in insufficient moisture resistance and waterproofness. Conversely, 25
If it exceeds g / m ² , the drying property after coating will be poor and the coating speed will be slow, leading to higher costs. If necessary, a known oxidized starch for curling prevention, a preservative, and a water-proofing agent can be coated on the back surface of the base paper. And, as a matter of course, the clear waterproof resin liquid may be applied on both sides. Then, when printing gloss is required, it is preferable to perform super calendar processing.
The nip pressure of the super calendar or the number of nip steps is
The nip pressure is preferably 145 to 250 kg / cm, and the number of nip steps is preferably 5 or more, although it is appropriately changed depending on the required glossiness.

[Laminating] Pigment Coated Paper, Clear Coated Paper, Inter-Paper Reinforced Paper Lamination Form Pigment-coated paper is represented by P, clear coated paper is represented by K, inter-paper reinforced paper is represented by S, and the laminating order is /. Then, the bonding form is
It is represented by / S for any of P, K, and S. Among these, it is preferable to adopt the following four types of bonding. (1) P / S (2) K / S (3) S / S (4) P / S / K where S is one or more layers, and the left side of / is the front (top) of the pasting paper, The right side means the back (lower paper).

[Laminating Method] Pigment-coated paper, clear-coated paper, and inter-paper reinforced paper are laminated by a dry laminating method or a wet laminating method. In the laminating, one base material for laminating, that is, an appropriate adhesive such as an acrylic adhesive, a vinyl acetate adhesive, a urethane adhesive on the back surface of the upper paper or the surface of the lower paper, Coating is performed using a coating machine such as a gravure coater, a reverse coater, and a multi coater so that the coating amount is 3 to 30 g / m ² . Adhesive, coating amount, lapping machine or
There is no particular limitation as long as it satisfies the condition that the adhesive interface does not peel due to bending by V-cut. As the adhesive, any adhesive can be used as long as it has sufficient durability, weather resistance, heat resistance, etc., but the organic solvent-based adhesive is more suitable than the water-soluble adhesive when the pigment is attached. Coated paper, clear coated paper, and inter-paper reinforced paper are preferable because of little dimensional change. Further, when the pigment-coated paper or the clear-coated paper to be the front side has a small amount of rice, it is preferable to add a masking agent such as titanium oxide to the adhesive. Furthermore, when it is used in a place where moisture proofing and waterproofing are required, it is necessary to use a waterproof adhesive containing wax. FIG. 1 shows an example of a dry laminating method and a wet laminating method, respectively. In the dry laminating method shown in FIG. 1 (a), the unrolled base material (11) is attached to the gravure roll (12).
The adhesive (13) is supplied and applied through the drying device (1)
After the solvent in the adhesive is scattered by 4), it is cooled by the cooling metal roll (15), and then the other roll unwound by the pressure roll (16) and the rubber roll (17) at the pressure-bonding portion. The base material (18) is pressed and laminated and wound up. Then, aging is performed in the wound state. On the other hand, in the wet lamination method shown in FIG. 1B, one unrolled base material (21)
To the adhesive (2) via a reverse roll coater (22).
3) is supplied and applied, and is pressed and stuck to the other unwound substrate (24) by a joining roll (25), and then the solvent in the adhesive is scattered by a drying device (26). After that, it is cooled and wound up. Then, aging is performed in the wound state. The laminated paper thus obtained is printed with a nitrified cotton-based ink or the like, and if necessary, a surface protective material is applied by a known method to obtain a laminated paper for a printed decorative board. . Which of the dry laminating method and the wet laminating method is used is appropriately determined depending on the base material, the adhesive, and the like. FIG. 2 shows an example of the printed laminated paper. The printed laminated paper (30) shown in FIG. 2 has an upper paper (31) and a lower paper (32) bonded together by an adhesive (33), and the surface of the upper paper (31) is printed with ink. (34) is applied, and the top coat (35) is applied to one surface.

[0018]

The bonding paper represented by / S with respect to any of P, K and S has excellent V-cut suitability and lapping machine suitability and can be used as a decorative sheet. Of these, those bonded in the form of (1) P / S (2) K / S (3) S / S (4) P / S / K are preferable. In (1), the pasting paper has good printability and V-cut suitability and wrapping machine suitability. In (2), it has excellent moisture-proof and waterproof properties, and V
Laminating paper with excellent cutting suitability and lapping machine suitability, (3) is a laminating paper with excellent V cut suitability, (4)
In, it is possible to obtain a pasting paper having good printability, excellent V-cut suitability and lapping machine suitability, and good barrier property against moisture on the back surface.

[0019]

The present invention will be described in more detail with reference to the following examples. Of course, the present invention is not limited to the following examples. Prior to the examples, base paper, inter-paper reinforcing paper, pigment coated paper, which is a material for the laminated paper,
The production and properties of the clear coated paper are shown as a reference example.

(Reference Example 1) Base paper and inter-paper reinforced paper (Base paper 1 and inter-paper reinforced paper 1) L-BKP 100%, freeness 310 cc, polyacrylic amide paper strength enhancer DRY 46 kg / T pulp liquid was used. Papermaking was performed with a Fourdrinier paper machine at a papermaking speed of 200 m / min to obtain a base paper 1 having a surface strength of 23 A, a smoothness of 410 seconds, and a basis weight of 30 g / m ² . When this is used as the inter-paper reinforcing paper, it is referred to as the inter-paper reinforcing paper 1.

(Base paper 2 and inter-paper reinforcing paper 2) L-BKP
100% freeness, 360 cc, pulp liquid of polyacrylic amide type paper strengthening agent DRY 52 kg / T was made with a Fourdrinier paper machine at a speed of 200 m / min, and surface strength was 2
0A, smoothness of 260 seconds to obtain a sheet 2 of basis weight 50g / m ^2. When this is used as the inter-paper reinforcing paper, it is referred to as the inter-paper reinforcing paper 2. Freeness of base paper and inter-paper reinforcing paper,
The test method and the evaluation method for the weight of rice, surface strength, and smoothness are as described below.

Reference Example 2 Pigment Coated Paper (Pigment Coated Paper 1) Pigment coat paint consisting of the following components and component ratios of fillers and binders was applied to one side of the base paper 1 on an off machine at 13 g / by a vent blade coater. The coating amount (dry weight) of m ² was applied, and then the coated surface was coated with a super calender at a speed of 30.
0 m / min, nip pressure 200 kg / cm, roll temperature 40
The pigment-coated paper 1 having a basis weight of 40 g / m ² was obtained by treating under a condition of ° C. Pigment coat paint Clay 80 parts by weight Titanium oxide 5 parts by weight Light calcium carbonate 10 parts by weight Heavy calcium carbonate 5 parts by weight SBR latex (trade name P-OZ37, manufactured by Sumitomo Dow Co., Ltd.) 20 parts by weight Esterified starch 1 part by weight The SBR latex is used to improve the adhesion with the nitrified cotton ink. The test method of the tsubo for pigment-coated paper is as described below.

Reference Example 3 Clear Coated Paper (Clear Coated Paper 1) Soap-free emulsion-polymerized SBR latex (trade name Pateracor SB-302, manufactured by Dainippon Ink and Chemicals, Inc.) was removed on one side of the base paper 1. the vent blade coater on the machine was coated with coating weight of 10 g / m ² (dry weight), to obtain a clear coat paper 1 of basis weight 40 g / m ^2. The method for testing the tsubo for clear-coated paper is as described below.

The above-mentioned inter-paper reinforcing paper, pigment coated paper,
A clear coated paper was used and the following combination was performed to obtain a laminated paper.

(Example 1) Pigment-coated paper 1 was used as the upper paper, and inter-paper reinforcing paper 1 was used as the lower paper, and they were laminated by the dry lamination method as follows. Acrylic adhesive (made by Saiden Chemical Co., Ltd.) on the back surface of the pigment coated paper 1.
Was coated with a gravure coater at a speed of 70 m / min at a coating amount (dry weight) of 15 g / m ² and dried at 90 ° C. Then, the inter-paper reinforced paper 1 was laminated with a pressure roll and wound. Taken and aged. The acrylic adhesive is composed of 55 parts by weight of butyl acrylate, 30 parts by weight of vinyl acetate, 10 parts by weight of methyl methacrylate, 4 parts by weight of a monomer containing a carboxyl group, 40 parts by weight of toluene, and 40 parts by weight of acetone. Polymerize with benzoyl peroxide in a solvent, dilute with toluene after completion of the polymerization reaction,
5 parts by weight of hexamethylene diisocyanate (HMDI) -based polyisocyanate is added to 100 parts by weight of a solvent-based adhesive prepared to have an evaporation residue of 49.6% and a viscosity of 2,350 cp / 30 ° C. Yes, durable,
It is an adhesive with excellent weather resistance, heat resistance, moisture resistance, and water resistance. The obtained laminated paper, in accordance with the test method described below, rice slab, thickness, elongation rate, tensile strength, folding resistance, air permeability, opacity, smoothness, glossiness, moisture permeability, waterproofness, and , And the oil resistance was evaluated. The results are as shown in the bonded paper quality column of Table 1. In order to evaluate the printability of the laminated paper, a urethane top coat was applied after gravure printing was performed using a nitrified cotton ink. The printability of the obtained printed laminated paper was evaluated according to the test method described later. The results are shown in the printability column of Table 1. The printed laminated paper was evaluated for tape peel strength, cross-cut suitability, V-cut suitability, and stain resistance according to the test method described below. Then, the printed laminated paper is wrapped with a vinyl acetate adhesive to a medium-quality fiberboard (MDF) by a lapping machine to manufacture a decorative board, and the V-cut suitability of the laminated paper and the suitability of the wrapping machine are manufactured. Was evaluated according to the test method described later. The results are shown in the column of plywood quality in Table 1. This laminated paper has excellent printability, V-cut suitability and wrapping machine suitability, and is suitable for V materials such as building materials.
Suitable for cut plywood and lapping plywood.

(Example 2) The clear-coated paper 1 was used as the upper paper, the inter-paper reinforcing paper 2 was used as the lower paper, and the sheets were laminated by the dry lamination method as follows. The same acrylic adhesive (manufactured by Saiden Chemical Co., Ltd.) as in Example 1 was used on the back surface of the clear coated paper 1 using a gravure coater at a speed of 70 m /
Minute, coating amount (dry weight) 15 g / m ² and 90 ° C
Then, the inter-paper reinforcing paper 2 was laminated with a pressure roll, wound, and aged. The quality of the obtained laminated paper was evaluated in the same manner as in Example 1. The results are as shown in the bonded paper quality column of Table 1. In order to evaluate the printability of the laminated paper, a urethane top coat was applied after gravure printing was performed using a nitrified cotton ink. The printability of the obtained printed laminated paper was evaluated in the same manner as in Example 1. The results are shown in the printability column of Table 1. The printed laminated paper was evaluated for plywood quality in the same manner as in Example 1. The results are shown in the column of plywood quality in Table 1. This laminated paper is moisture-proof and waterproof,
It is excellent in oil resistance, stain resistance, V-cut suitability and lapping machine suitability, and also printability, and is suitable for V-cut plywood and lapping plywood for kitchens, sanitary rooms and the like.

(Example 3) The inter-paper reinforcing paper 1 was used as an upper paper and a lower paper, and they were laminated by a dry lamination method as follows. The same acrylic adhesive as in Example 1 (made by Saiden Chemical Co., Ltd.) on the back surface of the inter-paper reinforcing paper 1 which is the top paper
Was coated at a speed of 70 m / min at a coating amount (dry weight) of 15 g / m ² using a gravure coater and dried at 90 ° C., and then the inter-paper reinforced paper 1 as the lower paper was pasted with a pressing roll. Combined, rolled up and aged. The quality of the obtained laminated paper was evaluated in the same manner as in Example 1.
The results are as shown in the bonded paper quality column of Table 1. In order to evaluate the printability of the laminated paper, a urethane top coat was applied after gravure printing was performed using a nitrified cotton ink. The printability of the obtained printed laminated paper was evaluated in the same manner as in Example 1. The results are shown in the printability column of Table 1. The printed laminated paper is the same as that in Example 1.
Similarly, the plywood quality was evaluated. The results are shown in the column of plywood quality in Table 1. Although this laminated paper is slightly inferior in waterproof / moisture-proof property, it has good V-cut suitability and lapping machine suitability, and is suitable for V-cut plywood and wrapping plywood such as construction material members.

(Example 4) Pigment-coated paper 1 was used as the top paper, inter-paper reinforcing paper 1 was used as the middle paper, and clear-coated paper 1 was used as the bottom paper. The same acrylic adhesive (manufactured by Saiden Chemical Co., Ltd.) as in Example 1 was applied to the back surface of the pigment coated paper 1 using a gravure coater at a speed of 70 m / min and a coating amount (dry weight) of 1
It was coated at 0 g / m ² and dried at 90 ° C., and then the inter-paper reinforcing paper 1 as the inner paper was laminated with a pressure roll, wound and aged to obtain a preliminary laminated paper. An acrylic adhesive (manufactured by Saiden Chemical Co., Ltd.) was coated on the back surface of the obtained pre-bonded paper at a speed of 70 m / min and a coating amount (dry weight) of 10 g / m ² as in the case of the pre-bonding. Then, it was dried at 90 ° C., and then the adhesive coated surface of the pre-bonded paper and the back surface of the clear coat paper 1 as the lower paper were bonded by a pressure roll, wound, and aged. The laminated paper obtained through these steps has a pigment coat surface on the front surface and a clear coat surface on the back surface.
The quality of the obtained laminated paper was evaluated in the same manner as in Example 1. The results are as shown in the bonded paper quality column of Table 1. In order to evaluate the printability of the laminated paper, a urethane top coat was applied after gravure printing was performed using a nitrified cotton ink. The obtained printed laminated paper is used in Example 1.
The printability was evaluated in the same manner as in. The results are shown in the printability column of Table 1. The printed laminated paper was evaluated for plywood quality in the same manner as in Example 1. The results are shown in the column of plywood quality in Table 1. This pasting paper is
It has excellent moisture and water resistance, oil resistance, stain resistance, suitability for wrapping machines, and especially V cut suitability. It is a building material and V cut plywood for kitchens, sanitary rooms, etc.,
Suitable for lapping plywood.

Comparative Example 1 Commercially available impregnated paper for decorative boards was used. The quality of the impregnated paper was evaluated as in Example 1. The results are as shown in the bonded paper quality column of Table 1. In order to evaluate the printability of the impregnated paper, gravure printing was performed using an acrylic ink, and then a urethane top coat was applied. The printability of the obtained printed impregnated paper was evaluated in the same manner as in Example 1. The results are shown in the printability column of Table 1. The quality of plywood was evaluated in the same manner as in Example 1 for the printed impregnated paper. The results are shown in the column of plywood quality in Table 1.

Comparative Example 2 A commercially available vinyl chloride film for decorative board was used. The quality of the vinyl chloride film was evaluated in the same manner as in Example 1. The results are as shown in the bonded paper quality column of Table 1. In order to evaluate the printability of the vinyl chloride film, it was gravure-printed with a vinyl acetate ink and then doubled with a transparent vinyl chloride film. The printed vinyl chloride film obtained was used in Example 1.
The printability was evaluated in the same manner as in. The results are shown in the printability column of Table 1. Further, the printed vinyl chloride film was evaluated for plywood quality in the same manner as in Example 1. The results are shown in the column of plywood quality in Table 1.
As is clear from comparison between Examples 1 to 4 and Comparative Examples 1 and 2, the laminated paper of the present invention can be used as a V-cut plywood or a lapping plywood, and can be replaced with a decorative board using a vinyl chloride film. It is a thing.

[0031]

[Table 1]

Test method and evaluation method (a) Freeness is based on JIS P 8121.
Tested with a Canadian Standard Freeness Tester. (B) The surface strength was tested by the wax method based on JIS P8129. (C) The smoothness was tested using a Beck's smoothness tester based on JIS P 8119. (D) The moisture permeability was tested based on JIS Z 0208 under condition B, that is, at a temperature of 40 ° C. and a relative humidity of 90%. (E) The waterproof property was evaluated by the weight increase due to the water content after being dipped in water after being bonded to MDF. ⊚: Excellent Δ: Slightly difficult ×: Inappropriate (f) The glossiness was tested with a glossiness meter based on JIS P 8142. (G) For printability, gravure printing for building materials was performed, and print gloss, ink adhesion, and reproducibility were evaluated. After printing, a usual urethane top coat was applied. ◎: Excellent ○: Good ×: Not suitable (h) The tape peeling strength is
After attaching cellophane tape (registered trademark), peel it off,
After repeating this 10 times, the peeling condition between sheets was evaluated. ◎: Excellent ○: Good (i) Cross-cut suitability is evaluated by cross-cutting the printed surface after topcoat with a cutter, attaching cellophane tape (registered trademark) and then peeling it off, and then evaluating the peeling condition between papers after tape peeling. did. ⊚: Excellent ∘: Good (j) Lapping machine suitability was evaluated by wrapping a concave MDF base material with a lapping machine, and evaluating the state of cracking and breaking of recesses. ⊚: Excellent ◯: Good x: Inappropriate (k) For V-cut suitability, the workability with a V-cut machine was evaluated. ◎: Excellent ○: Good ×: Not suitable (l) Contamination resistance is edible oil, thinner, acid (HCl),
The penetration of alkaline (NaOH) liquid was evaluated. ⊚: Excellent ◯: Good Δ: Slightly difficult (m) Air permeability was tested based on JIS P 8117. (N) Yonetsubo was tested based on JIS P 8124. (P) The elongation rate was tested based on JIS P 8132. The length means the flow direction of the paper making, and the width means the width direction of the paper making. (Q) Tensile strength was tested based on JIS P 8113. (R) Folding endurance is MIT based on JIS P 8115
It was tested using a mold folding endurance tester. (S) Oil resistance is described in J. TAPPI NO. It evaluated based on the kit method of 41. ⊚: Excellent ◯: Good Δ: Slightly difficult (T) Air permeability was tested based on JIS P 8117. (U) Opacity was tested according to JIS P 8138.

[0033]

Since the present invention is configured as described in detail above, it has the following effects. The surface strength defined by JIS P 8129 is 1
6 to 32 A, a base paper having a smoothness of 200 seconds or more specified by JIS P8119 is used, and this is used as a pigment coated paper P, a clear coated paper K, and an inter-paper reinforcing paper S, and the laminating order is (/). The pasting paper in which the pasting form is represented by / S for any of P, K, and S can be used as a pasting paper for veneer having excellent V-cut suitability and lapping machine suitability. The vinyl chloride film for a decorative board can be produced at low cost because it can be manufactured at low cost and can be used in place of the decorative board using the vinyl chloride film. In particular, when (1) P / S (2) K / S (3) S / S (4) P / S / K is pasted, (1) has good printability and V Laminating paper with excellent cutting suitability and lapping machine suitability, (2) is a bonding paper with excellent moisture-proofing and waterproofing properties as well as V-cut suitability and lapping machine suitability.
(3) is a laminated paper with excellent V-cut suitability, and (4) is a laminated paper with good printability, excellent V-cut suitability and lapping machine suitability, and good barrier property against moisture on the back surface. Can be obtained.

[Brief description of drawings]

FIG. 1 is a schematic view showing an example of a bonding method, in which (a) shows a dry laminating method and (b) shows a wet laminating method.

FIG. 2 is an example of a printed laminated paper.

[Explanation of symbols]

11, 18, 21, 24 Base material 12 gravure roll 16 Press roll 22 Reverse roll coater 25 joining roll

─────────────────────────────────────────────────── --Continued from the front page (56) Reference JP-A-57-189847 (JP, A) JP-A-58-163797 (JP, A) JP-A 61-10452 (JP, A) JP-A-4- 314538 (JP, A) JP 54-116409 (JP, A) JP 63-190092 (JP, A) JP 7-246684 (JP, A) JP 57-173163 (JP, A) JP-A-63-190094 (JP, A) JP-A-3-8900 (JP, A) JP-A-56-40551 (JP, A) JP-A-6-218882 (JP, A) JP-A-7-60929 (JP, A) JP-A-7-331594 (JP, A) Actually open 60-150040 (JP, U) Actually open 5-5444 (JP, U) (58) Fields investigated (Int.Cl. ⁷⁾ , DB name) B62B 1/00-35/00 D21H 19/20-19/22 D21H 27 / 26,27 / 30

Claims (4)

(57) [Claims] 1. At least soap-free emulsion polymerization containing no filler on at least one side of a base paper having a surface strength of 16 to 32 A specified by JIS P 8129 and a smoothness of 200 seconds or more specified by JIS P 8119.
SBR latex, soap-free emulsion polymerization NBR latex
Cous, of soap-free emulsion polymerization MBR latex
Either of the clear waterproof resin is 5 to 2 in dry weight
Clear coated paper coated with 5 g / m ² as top paper
And, in this, the surface strength as defined in JIS P 8129
16 to 32A, flatness specified in JIS P 8119
A laminated paper for a decorative board, which is obtained by laminating inter-paper reinforcing paper having a slipperiness of 200 seconds or more . 2. A surface defined by JIS P 8129.
Strength is 16-32A, specified by JIS P 8119
At least one side of base paper with smoothness of 200 seconds or more
The paint in which the filler and binder are applied to
Do not allow the fat component to penetrate the base paper and calender it.
Pigment coated paper as a top paper, and the surface strength specified by JIS P 8129 is 16 to 3
2A, the smoothness specified by JIS P8119 is 20
An inter-paper reinforced paper that is 0 seconds or more is used as a middle paper, and a lower layer of the inter-paper reinforced paper is specified by JIS P 8129.
Surface strength of 16-32A, JIS P 8119
With a small amount of base paper with a specified smoothness of 200 seconds or more
Soap-free milk with no filler on one side
Chemical polymerization SBR latex, soap-free emulsion polymerization NBR
Latex, soap-free emulsion polymerized MBR latex
One of them is a clear waterproof resin with a dry weight
5 ~ 25g / m ² Clear coated paper coated below
Laminated paper for decorative boards, which is laminated as paper . 3. A paint for the pigment coated paper
However, for 100 parts by weight of filler, SBR latex 14
~ 20 parts by weight, including 5 parts by weight or less of esterified starch
Look, the coating amount is 8~25g / ^{m 2} on one surface unit
The laminated paper for a decorative board according to claim 2 . 4. The inter-paper reinforcing paper has one or more layers.
The laminated paper for decorative boards according to claim 1, 2 or 3 .