JP2014162133A - Decorative sheet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a novel decorative sheet capable of overcoming qualitative flaws inherent in conifer-derived materials such as knotty irregularities, disparities of young and old materials, material cleavage/peeling, dry-up cracks, appearances after the smoothing of knots, etc. and of obtaining a conifer decorative sheet see-through-expressing, over the entire surface thereof, natural wood grains unique to conifers.SOLUTION: The provided decorative sheet is a decorative sheet 1 obtained by partially configuring a print pattern 3 on one or both surfaces of a sheet material 2 and by covering one surface side with a resinous layer 4 in which the transparency of the outermost surface of the decorative sheet laminated and pasted onto a contrast ratio test paper complying with the concealing power measurement clause of JIS K 5600-4-1 is 10-80% in terms of the white-black contrast ratio of the contrast ratio test paper.

Description

  The present invention relates to a decorative sheet to be attached to the surface of various plywoods using natural wood used as an interior material, and in particular, to a decorative sheet that can compensate for quality defects when using softwood plywood as an interior material. Is.

  2. Description of the Related Art Conventionally, plywoods obtained by processing conifers into lumber, plywood and the like and using coniferous materials such as larch and cedar have been used for structural plywood, building materials, furniture, wall materials and the like together with hardwood plywood.

  This conifer plywood has problems peculiar to conifer plywood, that is, compared to broad-leaved plywood, knots derived from coniferous wood, unevenness of early and late wood (unevenness of natural wood texture), peeling of wood cracks (fibrous turning), dry cracking Because of quality problems such as (cracking due to cold water), it has begun to be widely adopted for invisible structures such as structural plywood, concrete formwork plywood, and floor baseboard.

  By the way, in recent years, the use of domestic timber has been encouraged by the national policy, and it has been desired to use softwood plywood with abundant coniferous trees in a wide range of applications. Naturally, it is used for interior materials of buildings that are conspicuous. Although expansion is desired, in order to solve the above-mentioned problems arising from the softwood materials, such as knots, missing knots, grain bias, cracks, etc. Coating resin processing such as stopper, urethane coating, compaction, etc. is applied.

  In addition, in the use of the above-mentioned softwood plywood, in order to further improve the surface properties, the softwood plywood is smoothed by pre-filling putty into cracks, knots, dents, etc. In addition, a method of applying an adhesive and laminating an adhesive and a decorative sheet has been devised (see, for example, Patent Document 1).

JP2011-224823A

  The softwood plywood laminated with a decorative sheet or the like by the method of Patent Document 1 has become suitable for application to a noticeable interior material. However, this measure covers the shortcomings of coniferous plywood so that it is not visible, and even when using plywood made of natural materials derived from folds and wood, you can feel the warmth and feel of the wood. It was something that would disappear.

  In addition, the problems derived from the above-mentioned coniferous wood have not been sufficiently solved, and in particular, knot processing (stopping knots, finishing of fillers), material peeling, dry cracking, unevenness of wood (unevenness due to annual rings) As for, there was nothing that could be satisfied by pasting a decorative sheet or painting a surface.

  Furthermore, the phenomenon of dryness cracks, joints, and uneven patterns on the surface of the material in the cold and wet environments may vary depending on the environmental conditions. When the sheet is attached to the surface to hide the defects, the uneven pattern appearing on the surface of the plywood is inconsistent with the pattern of the decorative sheet, resulting in an unnatural appearance as a plywood using natural wood.

  Therefore, the problem of the present invention is to overcome the disadvantages in quality such as knot irregularities, unevenness of lumber, timber crack peeling, dry cracking, appearance after knot processing, which are problems derived from softwood materials, and softwood An object of the present invention is to provide a new decorative sheet for obtaining a coniferous decorative board in which natural wood peculiar to wood is expressed on the entire surface as a watermark.

  As a result of intensive studies, the inventors have invented a transparent decorative sheet provided with a printed pattern and a resinous layer on the surface of the sheet material, and the decorative sheet is transparently bonded to the surface of the coniferous material. By sticking to the surface of the plate with an agent, the problem of coniferous trees is overcome, and the uneven wood pattern is balanced by the printed pattern against the sparse parts, joints, and seals of the wood. It was made to become the whole woodwork pattern.

  In addition, a decorative board that is not inferior to natural wood as a coniferous material that is not useful as a natural wood, such as the surface properties and chemical resistance of the resinous layer, the warmth of the wood, and the balance of the texture are maintained. In other words, the present inventors have found a decorative sheet capable of overcoming substrate defects derived from conifers by combining natural wood, printing pattern and resinous layer.

  That is, this invention is a decorative sheet in which a printed pattern is partially provided on one side or both sides of a sheet material and one side is covered with a resinous layer, and conforms to the hiding power measurement term of JIS K 5600-4-1. On the outermost surface of the decorative sheet that is laminated and pasted on the concealment rate test paper, a configuration is adopted in which the concealment rate between white and black portions of the concealment rate test paper is 10 to 80%.

  Moreover, the said decoration sheet employ | adopts the structure whose slip angle by the inclination method prescribed | regulated to JIS-P8147 of a decoration sheet outermost surface is 10-50 degrees.

  Further, in the decorative sheet, a configuration is adopted in which the weight of the paper material in the sheet material is 10% or more of the total weight of the decorative sheet.

  The said decoration sheet | seat can exhibit the objective of this invention optimally by affixing on the surface of a conifer plywood, and setting it as a conifer decoration board.

  Conventional decorative sheets, decorative paper, and pre-coated paper are used for the purpose of completely concealing the defects of the base, but the decorative sheet of this invention has transparency and has a printed pattern of softwood. It is well-decorated and allows you to see through the texture of the fabric (annual rings), and to express the goodness of the underlying natural wood on the outermost surface, so that you can make use of the wood material and make up for defects and excesses and deficiencies derived from conifers. Can do.

  In other words, the decorative sheet of the present invention is a print in which substrate defects such as uneven lumbering, knots, cracks, and missing knots from natural wood are formed on a transparent sheet. It can be overcome by complementing it with the grain of the handle, and it is possible to decorate a high-quality decorative board with afforestation trees and conifers that are called low quality.

  In addition to decorating with a decorative sheet, the original base material (conifer plywood, etc.) can be seen through the grain, allowing the original design of the decorated base material to be fully utilized. Like the method of covering, a plurality of decorative plates are not unified, but become a decorative plate that is gradually changed, and a texture as a natural material is obtained.

  Furthermore, when a decorative sheet is attached to a softwood plywood, there is a problem that the unevenness due to the early and late materials of the base softwood does not match the pattern of the surface decorative sheet, and the appearance becomes unnatural, but a transparent decorative sheet As a result, the pattern of the material that causes unevenness of the groundwork is seen through, so that unnaturalness is eliminated.

  Moreover, since the thing which employ | adopted the structure whose slip angle by the inclination method prescribed | regulated to JIS-P8147 of the decoration sheet outermost surface is 10-50 degrees has little surface slip, the same touch as natural wood is obtained, The texture of natural materials can be obtained from both visual and tactile sensations.

  In addition, in decorative sheets, the paper material weight in the sheet material is 10% or more of the total weight of the decorative sheet. The texture as a tree will be obtained.

(A) is a perspective view which shows the decorating sheet and conifer plywood of this invention, (B) is the perspective view which bonded the decorating sheet to the conifer plywood. (A) is a perspective view which shows the decorative sheet | seat of this invention, and the softwood plywood of another example, (B) is the perspective view which bonded the decorative sheet to the softwood plywood of another example. It is an expanded sectional view of the surface part of the state which bonded together the decoration sheet to the softwood plywood. (A) Softwood plywood and its cross-sectional view, (B) is a cross-sectional view of a state in which a decorative sheet is bonded to the softwood plywood.

Hereinafter, the decorative sheet of the present invention will be described in detail with reference to the accompanying drawings.
FIG. 1A and FIG. 2A show a decorative sheet 1 and a softwood plywood 5 or 11 to which the decorative sheet 1 is attached.

  The decorative sheet 1 is, for example, a flexible sheet having transparency with a concealment rate of 30 to 50%, and is partially natural on the transparent and flexible sheet material 2 serving as a base material. A printed pattern 3 similar to a wood grain pattern is provided.

  As shown in the structure of the decorative sheet 1 in the partial cross-sectional view of FIG. 3, the decorative sheet 1 has a printed pattern 3 partially printed on the front side (the upper side in the drawing) of the sheet material 2. Further, the front side is covered with a resinous layer 4. In addition, since the sheet material 2 has transparency, the printed pattern 3 does not necessarily have to be formed on the front side of the sheet material 2, but can be formed on the back surface (the lower side in the drawing) of the sheet material 2. Alternatively, it can be formed on both front and back surfaces of the sheet material 2.

  As a method of manufacturing the decorative sheet 1, the printed pattern 3 is printed on the sheet material 2 and the resin coating of the resin in order, so that the printed pattern 3 is placed on one or both surfaces of the sheet material 2. The resinous layer 4 is formed on one surface (front side) of the sheet material 2.

  This sheet material 2 is a main part of the decorative sheet 1, and various sheet-like materials can be applied as long as it becomes a flexible sheet shape. For example, paper, paper material, film, Resin, resinous material, etc. can be applied, regardless of the material.

  Examples of the configuration of the sheet material 2 include, for example, a material made only of paper, a paper material (mixed with a resin mainly composed of paper, or a mixture of paper and film, or a resin mixed with a laminate of paper and film) ), Or those consisting only of a film.

Among the materials constituting the sheet material 2, as a paper raw material for paper or paper-based material, resin, pigment, filler and the like are combined from those generally referred to as thin paper of about 15 to 50 g / m ^2. Including paper quality. Paper belonging to thin paper includes glassine paper, cigarette paper, India paper, copy paper, condenser paper, copy paper, air mail paper, filter paper, and the like.

  Also includes laminated materials of paper material and resinous material such as PE, PP, and other resinous materials fused and laminated to the above paper material, and the resinous layer is also made of synthetic resin or molten A composite of resin and film-like material may be used.

  The raw material for the resin and film is not particularly limited, and may be any material that can be used for paper materials or can be formed into a sheet. Examples of the resin include an acrylic emulsion and an acrylic water-soluble resin. And known resins such as PE and PP.

  As described above, various materials and modes can be applied to the sheet material 2. In short, as long as the decorative sheet 1 does not lose the transparency defined by the invention, the material and mode are not limited.

  The printed pattern 3 on the sheet material 2 is artificial with material defects such as non-uniformity and unevenness of natural wood derived from softwood plywood, joint surface of joints, repair surface of cracks, uneven material color, dirt, and mold. It supplements with a typical printed pattern layer, and has the role of making use of the beautiful grain of natural wood. That is, the overall uniformity of the natural wood is achieved by a composite pattern of the natural wood and the printed pattern.

  For this reason, the wood grain that appears mainly on the surface of the wood, in particular, the evening material portion having a dense and dark color, is expressed by the printed pattern 3. However, it is intended to make up for the defects and deficiencies in the grain of natural wood (for example, softwood plywood), which may be rougher than the pattern of the grain that appears on the surface of a normal wood-tone decorative material.

  As a printing method of the printed pattern 3 on the front side or the back side of the sheet material 2, gravure printing is preferable by a method capable of printing on the sheet material 2, and as printing ink used for gravure printing, nitrocellulose resin, pigment, It is composed of a surfactant, a diluent and the like, and may be oily or aqueous, but various other known inks and paints can be used. The number of printing plates can be 1 to 4 plates according to the design requirement, but about 2 plates are preferable. Further, the concealment control can be performed by the depth of the solid plate.

  The resinous layer 4 is formed on the front side of the sheet material 2, and when the printed pattern 3 is formed on the front side, the outermost surface of the decorative sheet 1 covers the entire surface of the sheet material 2 including the printed pattern 3. It has the role of imparting coating film properties such as chemical resistance, abrasion resistance, and gloss. For example, oil-based and water-based paints may be used as long as they are paints that give the required quality of the decorative sheet by raising two-component urethane resin paints in which isocyanate is blended with acrylic polyol or polyester polyol, UV paints, and the like.

  Moreover, since this resinous layer 4 is an outermost layer of the decorative sheet 1 and is also a part that touches the hand when used as an interior material, it has an important role as a tactile sensation. In order to achieve such a natural hand, it plays an important role in obtaining the slip defined in the claims of the present invention.

  As a method for forming a coating film of the resinous layer 4, there are gravure printing and painting, and as a coating method, there are a roll coater, a die coater and the like, and a gravure coater is particularly preferable. Further, the present invention is not limited to printing and painting, and is not particularly limited as long as similar surface characteristics can be obtained by forming a plastic resin film.

  The surface characteristics of the resinous layer 4 will be specifically described. For example, it is required to be matte in order to obtain a texture as a natural material. A total of about 3 to 15 is preferable. The matting agent may be a commercially available organic or inorganic material such as silica, glass beads, or plastic beads.

Moreover, you may add an inorganic and organic type slip agent and various additives as needed. For example, a transparent matte resinous layer can be obtained by applying 10 g / m ² (dry) of the above-mentioned paint with a gravure coater and drying at 150 ° C. for 30 seconds. In order to make it feel, texture and feel similar to natural wood, the sliding friction angle of the surface is in the range of 10 to 50 °, preferably in the range of 30 to 40 °.

  Next, as an example, the softwood plywood 5 to which the decorating sheet 1 is attached is, as shown in FIG. 1 (A), as it is, there is no natural wood texture due to partial deviation of the early wood 6 and the late wood 7. There are knots that are uniform and have knots 8 with sealants to deal with quality problems such as knots derived from coniferous wood, peeling of material cracks and dry cracks.

  As for the conifers constituting the conifer plywood 5, domestic timbers are larch, spruce, todomatsu, hiba, cedar, etc., and North America bay pine, batesga, spruce, etc. as external materials, as well as radiata pine. These materials are timbered, sliced, and separated into softwood plywood, laminated timber, and solid wood. Among these, the softwood used as the object of the present invention is particularly preferably used as softwood plywood (Japanese Agricultural Standards / JAS Standards).

  However, the decorative sheet 1 of the present invention is not necessarily used only for the softwood plywood 5 shown in FIG. 1, and does not exclude the use for hardwood plywood and other plywood.

  As shown in FIG. 1 (B), by overlaying and laminating (adhering) the transparent decorative sheet 1 from the front side of the softwood plywood 5 that is visible to the public, The coniferous decorative board 10 is obtained in which the uniform, wood pattern, and 8 marks of the eyes are slightly concealed, and the defect appears to fade.

  The softwood plywood 5 and the decorative sheet 1 are bonded and integrated by an adhesive layer 9 as shown in FIG. 3, and the material of the adhesive layer 9 is a vinyl acetate adhesive. Others may be used. However, in order to ensure the transparency of the decorative sheet 1, it is better not to add materials such as wheat flour and calcium carbonate that are generally blended because they impair the transparency.

The concealment rate of the general-purpose vinyl acetate adhesive was 8 to 10%. The covering ratio of the transparent adhesive was determined by applying Aika Eco Eco Bond A-1400 (vinyl acetate resin emulsion type) manufactured by Aika Industry Co., Ltd. to 50-100 g / m ² covering ratio test paper and drying at 40 ° C./20 minutes. The concealment rate of was 8.5%. Similarly, Boncoat F-30 (manufactured by DIC Kita Nippon Polymer Co., Ltd.) was 9%, and the pigment-containing adhesive (S Company) was 43%.

  When laminating general pre-coated paper and decorative sheet, in order to cover different colors such as base plywood, MDF, PB base material, etc., and to improve adhesive properties, titanium pigment, iron oxide loess, Calcium carbonate, clay, flour, etc. may be blended. However, the purpose of the present invention is to have transparency while making use of the base of the softwood material and decorate the printed pattern, and it is essential that the adhesive also has transparency. From the above, the concealment rate of the adhesive is 7 to 30%, but the transparency is required, so 15% or less is preferable.

  Thus, the softwood decorating board 10 obtained by decorating the base softwood plywood 5 with the decorative sheet 1 having transparency covers the defects of the base by decorating with the printed pattern 3. At the same time, the wood texture by the printed pattern 3 of the decorative sheet 1 appears in the portion where there is no wood texture in the central portion, and the whole grain is balanced. The print pattern 3 (wood grain) by 1 is decorated, and the new decoration pattern is combined, so that the design bias seen through from the outermost surface layer is eliminated, and the entire surface is balanced as a new pattern A well-balanced design in which the knots and wood from the stop 8 are combined can be expressed.

  The softwood plywood 11 in FIG. 2 (A) is different from the softwood plywood 5 in FIG. In this case as well, the decorative sheet 1 similar to that shown in FIG. 1 is pasted to obtain the softwood decorative board 12 as shown in FIG.

  The softwood plywood 5 in FIG. 1 (B) and the softwood plywood 11 in FIG. 2 (B) are plywood substrates with different finishes, but by sticking the decorative sheet 1, the printed pattern of the decorative sheet 1 is printed. The wood grain by 3 becomes the main body of the pattern, and the softwood decorative boards 10 and 12 have similar designs.

  Since the softwood plywood 5 and 11 has its own natural wood texture and the like due to the transparency of the decorative sheet 1, the design of the softwood plywood 5 and the softwood plywood 11 is not completely the same, and a plurality of plywoods are the same. When used for a part, the decorative sheet obtained is not a uniform one with the same design as the pasted one of the same decorative sheet, but a natural balance using natural wood Is obtained.

  FIG. 4 shows the conifer plywood 5 used in FIG. 1 (A). FIG. 4 (A) is a perspective view of the conifer plywood 5 in a state where the sealing treatment and the surface smoothing treatment are performed, and its XX line. (B) is a cross-sectional view showing a state where the decorative sheet 1 is affixed, the black portion reaching the surface of the softwood plywood 5 is the late wood 7 (wood grain) of the early and late wood, The gray color portion is the seal 8 by the sealant.

  When general decorative paper, general-purpose pre-coated paper, decorative sheet, etc. are bonded to these hard evening materials 7 and eyelets 8, the hard parts (evening material 7 and eyelets 8) are applied by the pressure applied at the time of adhesion. Becomes a convex state, and the other parts (soft) of the early wood 6 are recessed in reverse (see FIG. 4B). Furthermore, a dimensional change becomes remarkable by hot and humid heat and cold environment, and the uneven pattern with a sense of incongruity expands.

  Under these circumstances, conventional general-purpose pre-coated paper, those having a concealed printed pattern, such as a decorative sheet, have a printed pattern (wood grain) different from this three-dimensional uneven pattern, As a whole, the unevenness and the printed pattern (wood grain) are uneven, resulting in an unnatural pattern.

  However, in the decorative sheet 1 having transparency according to the present invention, the part of the evening material 7 that is the original grain of the softwood plywood that is the base material is transparent to the transparent sheet of the decorative sheet 1. Therefore, even if unevenness occurs, the grain appears in synchronism with the pattern and there is no sense of incongruity. Rather, since the uneven part, the woodwork, and the joints are the same object, the natural feeling can be expressed realistically by the rise of the natural woodwork.

  EXAMPLES Hereinafter, the present invention will be specifically described with reference to examples. However, the present invention is not limited to the following examples, and can be implemented with appropriate modifications within the scope of the object of the present invention. Moreover, the numerical unit "part" of the quantity in an Example shall express a mass part unless there is particular notice.

  The softwood plywood 5 uses a commercially available larch softwood plywood 12 mm thick (JAS standard) and uses an aqueous putty (acrylic emulsion / calcium carbonate / clay / talc / auxiliary / water = 20/60/10/10 / appropriate / appropriate). The substrate was cut with a knife coater blade, dried in a hot air drying oven at 50 ° C. for 30 minutes, polished with abrasive paper # 180, and this was repeated twice to prepare a substrate with softwood plywood sealed. In addition, when the unevenness | corrugation of the base material and the sealing effect were few, the sealing process was implemented several times.

Subsequently, the two-part aqueous emulsion adhesive, manufactured by Chuo Rika Kogyo Co., Ltd., Rikabond BA-10L / BA-11B = 100 / 2.5, was applied so that the adhesive was 80 to 160 g / m ^2. It dried for 1 to 3 minutes in a 50 degreeC hot-air drying furnace, the decorative sheet | seat (hiding ratio = 45%) of this invention which has transparency was bonded together, and it cured at normal temperature for 48 hours.

  As a comparative example, for the softwood plywood that is the base material, a non-processed one as it is, and ones with various coatings and conventional decorative paper pasted on the surface are also prepared (No. 1 to 4), and within the scope of the present invention. (No. 5-8) (Table 1).

In addition, the concealment rate of various coatings and sheets is measured. In order to quantify the transparency of the decorative sheet, the concealment rate (hereinafter referred to as concealment rate *) is determined in accordance with the concealment force measurement term of JIS K 5600-4-1 1) was measured.
The measurement was performed by measuring the tristimulus value (YW) of the white part and the tristimulus value (YB) of the black part from the decorative sheet surface bonded on the test sheet of the concealment ratio, and expressing YB / YW as a percentage. .

  This measured value shows that the correlation between the cover ratio * 1 when the decorative sheet having transparency is pressed onto the softwood and the cover sheet on the black and white part of the cover ratio test paper is positive. It was. Therefore, the test results of the concealment rate * 1 when using the concealment rate test paper are shown in Table 2 as comparative examples (No. A to D) and those within the scope of the present invention (No. E to H). And compared.

  That is, it is possible to judge the transparency of the wood grain, joints, etc. on the outermost surface of the decorative sheet by measuring the concealment rate * 1, and the validity is appropriate. Therefore, even if the material, hue, wood grain, etc. of the coniferous material change somewhat, it is sufficient if the measured value of the concealment ratio * 1 satisfies the range defined in the present invention.

  As mentioned above, the softwood plywood using the decorative sheet of the present invention also has the natural knots and grain of the natural wood seen through, the natural view is maintained, and the putty and the sealing part are also from the examples. It was decorated with a print pattern on the decorative sheet, and a natural wood feeling was obtained overall. Moreover, the thing similar to a natural wood was obtained for what made the slip angle prescribed | regulated to JIS-P8147 into a regulation.

DESCRIPTION OF SYMBOLS 1 Decorative sheet 2 Sheet material 3 Print pattern 4 Resinous layers 5 and 11 Softwood plywood 6 Early wood 7 Late wood 8 Seal 9 Adhesive layers 10 and 12 Softwood decorative board

Claims (4)

  In a decorative sheet in which a printed pattern is partially provided on one surface or both surfaces of a sheet material and one surface side is covered with a resinous layer, on a concealment rate test paper in accordance with a concealment force measurement term of JIS K 5600-4-1 A decorative sheet characterized by having transparency in which the concealment ratio between white and black portions of the test sheet for covering ratio is 10 to 80% on the outermost surface of the decorative sheet laminated and bonded.   The decorative sheet according to claim 1, wherein a slip angle by an inclination method defined in JIS-P8147 on the outermost surface of the decorative sheet is 10 to 50 °.   The decorative sheet according to claim 1 or 2, wherein the weight of the paper material in the sheet material is 10% or more of the total weight of the decorative sheet.   The decorating board which affixed the decorating sheet of any one of the said Claims 1 thru | or 3 on the surface of the conifer plywood.

Images