JP2004174738A - Sliced veneer sheet - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a sliced veneer sheet usable over a long period of time without being discolored markedly by suppressing the effect of oxygen or steam causing the discoloration of sliced veneer. <P>SOLUTION: The sliced veneer sheet is obtained by covering the upper and rear surfaces of the sliced veneer 2 with gas barrier layers 1 and 3 having oxygen and steam barrier properties. The gas barrier layers 1 and 3 desirably have an oxygen permeability of 100 cm<SP>3</SP>/m<SP>2</SP>x24hrxatm or less and a moisture permeability of 10 g/m<SP>2</SP>x24 hr or less. As the surface gas barrier layer 1, a transparent synthetic resin film 11 having a transparent inorganic thin film layer 12 formed on one surface thereof or a transparent synthetic resin film or the like comprising a laminate, which comprises an oxygen barrier synthetic resin layer and a steam barrier synthetic resin layer, is used preferably. A perspective pattern layer 13 or the like may be applied to the film 11. As the rear gas barrier layer 3, a synthetic resin film 31 having a metal thin film layer formed on one surface thereof, a metal foil or the like is preferably used. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a veneer sheet used for buildings such as houses and interiors of vehicles and the like.
[0002]
[Prior art]
Conventionally, natural wood-based decorative materials, such as solid wood veneer and veneer plywood, which are used as interior materials for buildings and vehicles, are natural materials, so they have weather resistance, stain resistance, and abrasion resistance. However, the resistance has been compensated for by coating the surface with a synthetic resin paint or the like.
[0003]
However, the painting operation involves a large number of steps such as application, polishing, undercoating, intermediate coating, and finish coating of a sanding sealer, which is complicated and costly. In addition, there is a problem on occupational health due to evaporation of a solvent contained in the coating.
[0004]
In addition, when a coating material containing a solvent is exposed to a high temperature in order to dry the coating material at a high speed, defects such as warpage and cracks of the base material are apt to occur, so that a long time drying at a relatively low temperature is required. For this reason, the line length of the coating equipment is inevitably long, and it must be a large equipment requiring a large installation area, and the production efficiency is low because the speed does not increase.
[0005]
In order to mitigate this problem as much as possible, instead of painting solid veneer or veneer plywood, a nonwoven fabric for reinforcement or a fibrous sheet such as Japanese paper is laminated on the back of the sheet veneer and painted on the veneer surface To produce a veneer sheet, and affix it to the surface of a plywood or the like.
[0006]
According to this method, the laminate of the veneer and the fibrous sheet is a long continuous sheet-like material having a high flexibility unlike a plywood or the like, so that the veneer plywood or the like is a discontinuous hard plate-like material. Compared to painting, painting and drying can be performed with simple equipment with a smaller installation area, and since the heat capacity is much less, the time required for drying is greatly reduced, and efficient painting work is possible It is.
[0007]
However, even with this method, in terms of painting on natural wood, it is necessary to apply the method between the individual wood bases and between the spring and autumn wood bases in a single wood base. Because the degree of penetration of the paint differs depending on the difference in the density of the wood structure, the finish state such as the coating film thickness and the surface gloss tends to vary, and it is difficult to stably supply products of uniform quality.
[0008]
Further, since the veneer is a natural material, it is difficult to stably supply a product of uniform quality even in terms of design due to its color tone and grain shape. Of these, the color tone can be adjusted to some extent by coloring the paint, but the wood grain shape that greatly affects the design cannot be dealt with by painting alone.
[0009]
Regarding this, wood grain printing on the veneer surface is also conceivable, but problems such as easy printing omission due to unevenness of the surface and unevenness of printing ink penetration due to the difference in density of the wood structure are likely to occur. There is no practical.
[0010]
Therefore, a method of attaching a transparent or translucent synthetic resin film having a transparent woodgrain pattern printed thereon in advance on the surface of the veneer has been proposed, and has already been widely used (see Patent Documents 1 and 2).
[0011]
By sticking the synthetic resin film to the veneer in this way, the veneer sheet can be protected from damage such as breakage or cracking when the veneer sheet is bent, so that bending (V-cutting) or wrapping (wrapping) can be performed. Processing) is also possible (see Patent Documents 3 and 4).
[0012]
However, even if a synthetic resin film is adhered to the surface of the veneer as described above, the problem of insufficient weather resistance of the veneer is not necessarily sufficiently solved. That is, since the veneer is a natural woody material, if it has been used for many years, it tends to cause burns (discoloration) and corrosion, and its design is impaired.
[0013]
In particular, in areas around water or in areas where dew condensation may occur, such as in window frames, etc., moisture may pass through a fibrous layer such as Japanese paper or nonwoven fabric or a wooden base material laminated on the back side of the veneer. Problems such as corrugation, peeling, and corrosion of the veneer due to penetration of (steam) into the veneer are significant.
[0014]
In order to contribute to solving such a problem, there is a proposal of a veneer sheet having a configuration in which the front and back surfaces of a veneer are sandwiched between waterproof and moisture-proof thermoplastic resin films (see Patent Documents 5 to 7).
[0015]
However, even if the effect of water vapor is eliminated by the above-described method, although the burnt of the veneer can be improved to some extent, it is difficult to sufficiently suppress the burnt of the veneer to a level that does not hinder practical use even when used for a long time. there were. This is probably because the veneer causes discoloration due to the action of oxygen and ultraviolet rays in addition to moisture.
[0016]
[Patent Document 1]
JP-A-63-134238 [Patent Document 2]
Microfilm of Japanese Utility Model Application No. 61-185779 (Japanese Utility Model Application Laid-Open No. 63-93132) [Patent Document 3]
JP-A-3-87251 [Patent Document 4]
JP 9-136385 A [Patent Document 5]
Japanese Patent Publication No. 37-10934 [Patent Document 6]
Microfilm of Japanese Utility Model Application No. Hei 3-10776 (Japanese Utility Model Application Laid-open No. Hei 4-100843)
JP-A-6-91834
[Problems to be solved by the invention]
The present invention has been made in order to solve the above-described problems in the related art, and by suppressing the influence of oxygen or water vapor that causes discoloration, it is possible to maintain the color for a long time without causing significant discoloration. A veneer sheet that can be used is provided.
[0018]
[Means for Solving the Problems]
The veneer sheet of the present invention is a veneer sheet characterized in that the front and back sides of the veneer are covered with a gas barrier layer having an oxygen barrier property and a water vapor barrier property.
[0019]
In the veneer sheet, the gas barrier layer has an oxygen permeability of 100 cm ³ / m ² · 24 hr · atm or less and a moisture permeability of 10 g / m ² · 24 hr or less. Things.
[0020]
Further, in the veneer sheet described above, a surface gas blocking layer that covers the front side of the veneer plate among the gas blocking layers is transparent or translucent.
[0021]
Further, in the veneer sheet, the surface gas barrier layer is a transparent or translucent synthetic resin film having a transparent or translucent oxygen barrier and water vapor barrier inorganic thin film layer formed on at least one surface. It is characterized by the following.
[0022]
In the above veneer sheet, the surface gas barrier layer is a laminate including at least an oxygen barrier synthetic resin layer and a water vapor barrier synthetic resin layer.
[0023]
Further, in the veneer sheet described above, the surface gas barrier layer is provided with a transparent coloring or pattern.
[0024]
Further, in the veneer sheet described above, the back gas blocking layer covering the back side of the veneer among the gas blocking layers is opaque.
[0025]
In the above veneer sheet, the backside gas barrier layer is a metal foil or a synthetic resin film having a metal thin film layer formed on at least one surface.
[0026]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the veneer sheet of the present invention will be described with reference to the drawings.
[0027]
FIG. 1 is a side sectional view showing one configuration example of the veneer sheet of the present invention.
[0028]
The veneer sheet is configured such that the veneer plate 2 is laminated on the backside gas barrier layer 3 via an adhesive layer 42, and the surface gas barrier layer 1 is laminated thereon via an adhesive layer 41. Further, an adhesive layer 5 for adhering the veneer sheet to various adherend substrates is formed on the back surface of the back gas blocking layer 3.
[0029]
The veneer 2 is a thin plate obtained by thinly slicing natural wood as is conventionally known, and usually has a thickness of 3 mm or less. However, the workability and the angle when attaching to a substrate to be adhered as a veneer sheet are described. Thin materials are preferred in terms of the ability to follow parts and curved surfaces, etc. In particular, considering the non-combustibility and flame retardancy of building materials, use materials with a calorific value of about 150 to 200 μm when burning. Is preferred.
[0030]
The back gas blocking layer 3 and the front gas blocking layer 1 are made of an oxygen-blocking and water-vapor blocking material. Regarding the degree of the oxygen barrier property and the water vapor barrier property, according to the experiments of the present inventors, the oxygen permeability was 100 cm ³ / m ² · 24 hr · atm (JIS Z 0208, cup method, 40 ° C. 90% RH). Hereinafter, the moisture permeability is preferably 10 g / m ² · 24 hr (JIS K 7126, method B, 25 ° C., 80% RH) or less.
[0031]
The surface gas blocking layer 1 is made of a transparent or translucent material in order to make use of the design feeling of the veneer plate 2. As such a transparent or translucent gas barrier layer, a layer mainly composed of a transparent or translucent synthetic resin film similar to a transparent gas barrier film generally used for conventional food packaging is used. can do.
[0032]
The transparent gas barrier film may be a single-layer film made of a single type of synthetic resin as long as the material has an oxygen permeability and a moisture permeability within the range specified in the present invention. In reality, since a material suitable for this is not known, it is general that the laminate is made of a plurality of materials.
[0033]
Specifically, for example, an inorganic thin film layer 12 such as silicon oxide, aluminum oxide, magnesium oxide, or zirconium oxide is formed on one or both surfaces of a general synthetic resin film 11 such as a polyethylene terephthalate film or a polypropylene film by a vacuum evaporation method or Oxygen permeability but low moisture permeability such as inorganic vapor-deposited film (so-called ceramic vapor-deposited film) provided with oxygen barrier property and water vapor barrier property by being formed by a sputtering method, or polypropylene or polyvinylidene chloride, for example. Is a synthetic resin film having a high water vapor barrier property and a synthetic resin film having a low oxygen permeability but a high moisture permeability such as polyvinyl alcohol and ethylene-vinyl alcohol copolymer. Laminating layer 112) Such as Tofirumu is used.
[0034]
In order to prevent an increase in oxygen permeability due to moisture absorption of the oxygen-blocking synthetic resin layer 112, both surfaces of the oxygen-blocking synthetic resin layer 112 are coated with a water vapor-blocking synthetic resin layer 112 as shown in FIG. In general, the resin layer 111 is sandwiched.
[0035]
When comparing the above-described inorganic vapor-deposited film and the laminated film, the latter laminated film is thicker to obtain sufficient performance because it is necessary to obtain oxygen barrier property and water vapor barrier property by the thickness of the synthetic resin layer. On the other hand, while the transparency is disadvantageous due to the multilayer structure, the former inorganic vapor-deposited film has a very thin inorganic thin film layer having a thickness of about several hundred nm to several thousand nm (oxygen and water vapor). ) Since the barrier property is exhibited, the thickness of the gas barrier layer can be reduced as a whole, and there is an advantage that the transparency is excellent.
[0036]
As the inorganic vapor-deposited film, in consideration of transparency, printability, processability, durability, price, and the like, an inorganic vapor-deposited polyethylene terephthalate film is most preferable, and a thickness of about 8 to 12 μm provides sufficient performance. .
[0037]
When the inorganic thin film layer 12 provided with the inorganic thin film layer 12 on only one side of the synthetic resin film 11 is used, the inorganic thin film layer 12 may be used with the inorganic thin film layer 12 facing the surface (opposite the side of the veneer plate 2). It is also possible.
[0038]
However, if the inorganic thin film layer 12 is partially damaged due to abrasion or scratching of the surface during use of a building material or the like having the veneer sheet adhered to the surface, oxygen or water vapor enters from the damaged portion, and the veneer sheet is used. In order to prevent this, it is preferable to use the inorganic thin film layer 12 with the inorganic thin film layer 12 bonded to the projecting plate 2 side, as shown in FIG.
[0039]
If an ultraviolet absorber or a light stabilizer is added to the synthetic resin film 11 in the surface gas blocking layer 1 as needed, the synthetic resin film 11 can be prevented from being deteriorated by the action of ultraviolet rays, and can be protected from ultraviolet rays. It is also effective in suppressing burn of the veneer plate 2 by the action.
[0040]
In the surface gas blocking layer 1, an artificial grain pattern by printing or the like is overlapped while making use of the design feeling and the material feeling of the laminated veneer 2 to homogenize the variation of the natural grain, and / or A transparent pattern layer 13 (including the case of a plain colored layer; the same applies hereinafter) is provided on one or both sides thereof for the purpose of homogenizing color variations of natural wood by uniformly coloring. Can be.
[0041]
In the case of coloring without a pattern, a colorant may be kneaded into the synthetic resin film 11 used for the surface gas blocking layer 1 to form a transparent or translucent colored film. It is of course possible to use the coloring of the synthetic resin film 11 by this method and the pattern layer 13 by printing or the like in combination.
[0042]
The transparent pattern layer 13 may use a transparent or translucent printing ink using a highly transparent dye or pigment, or use a low-transparency or substantially opaque printing ink. However, if printing is performed in a halftone dot shape with many omissions, it is possible to substantially maintain the see-through property that allows the projecting plate 2 to be seen through.
[0043]
A transparent or translucent surface for imparting surface physical properties such as surface hardness, abrasion resistance, abrasion resistance, solvent resistance, and stain resistance to the surface of the surface gas blocking layer 1 as necessary. A protective layer can be provided.
[0044]
In general, a cross-linking curable resin such as a two-component curable acrylic urethane resin or an ionizing radiation curable resin is used for the surface protective layer from the viewpoint of physical properties. If necessary, the surface protective layer may be, for example, an ultraviolet absorber, a light stabilizer, a heat stabilizer, a lubricant, an antistatic agent, an anti-condensation agent, an antibacterial agent, a fungicide, a lubricant, a coloring agent, or a filler. Such additives can be added as appropriate, as long as the transparency is not significantly impaired.
[0045]
From the viewpoint of weather resistance, which is the main object of the present invention, even if the back surface gas blocking layer 3 is transparent or translucent like the front surface gas blocking layer 1, there is no particular problem. However, in order to conceal the colors and defects of the surface of the adherend substrate to which the veneer sheet of the present invention is to be adhered, and to stabilize the appearance design after adhering, the opacity must be opaque. Is preferred.
[0046]
From the viewpoint of the gas (oxygen and water vapor) barrier properties, the same material as the surface gas barrier layer 1 can be used for the back gas barrier layer 3. A opaque printing ink or paint concealing layer is provided on one or both sides or between layers of the same gas barrier layer as in the layer 1, or a highly opaque pigment is kneaded into the synthetic resin film 11 to make the opaque opaque. It may be colored.
[0047]
However, in order to impart sufficient concealing properties without increasing the thickness of the backside gas barrier layer 3 or increasing the number of manufacturing steps, a metal thin film such as aluminum is used instead of the inorganic thin film layer in the above-described inorganic vapor deposition film. It is preferable to use a metal vapor-deposited film (FIG. 1) in which the layer 32 is formed on one or both sides of the synthetic resin film 31, or a metal foil 33 (FIG. 2) such as an aluminum foil.
[0048]
The metal vapor-deposited film is more excellent in handleability such as fold resistance and puncture resistance than metal foil, and is available at a lower price than inorganic vapor-deposited films in the market. It can be said. Sufficient performance can be obtained with a thickness of about 8 to 12 μm.
[0049]
When using a metal-deposited film in which the metal-deposited layer 32 is provided only on one surface of the synthetic resin layer 31, the metal-deposited layer 32 may be used with the metal-deposited layer 32 facing the back side (the opposite side to the veneer plate 2 side). It is possible.
[0050]
However, in order to prevent the metal vapor deposition layer 32 from being damaged in the manufacturing process of the veneer sheet and the subsequent process, it is preferable to use the metal vapor deposition layer 32 by sticking it to the veneer 2 side. According to this method of attachment, the exposed surface of the back surface of the back gas blocking layer 3 is not a metal deposition layer 32 that is difficult to adhere, but a general-purpose synthetic resin film 31, so that the back surface gas shielding layer 3 can be attached to a substrate to be adhered. There is also an advantage that the range of choice of an adhesive or a pressure-sensitive adhesive is expanded.
[0051]
The adhesive used for the adhesive layer 41 for adhering the surface gas blocking layer 1 and the veneer plate 2 is originally transparent or translucent in order to make use of the design feeling and material feeling of the veneer plate 2, or at the time of bonding work. Even if it is opaque, it may be transparent or translucent after curing. For example, vinyl acetate adhesive, urethane adhesive, polyester adhesive, epoxy adhesive, acrylic adhesive, synthetic rubber adhesive Any conventionally known adhesive such as an agent can be used.
[0052]
The adhesive used for the adhesive layer 42 for bonding the back gas blocking layer 3 and the veneer plate 2 is basically the same as that used for bonding the front gas blocking layer 1 and the veneer plate 2 described above. It is not limited to transparent or translucent, and may be opaque.
[0053]
In particular, if a color similar to the color of the veneer plate 2 is used, the concealability of the backside gas blocking layer 3 is insufficient, or the backside gas blocking layer 3 itself is an undesirable color for backing the veneer plate 2. However, the adhesive layer 42 can provide a function of compensating for concealment or adjusting the background color to stabilize the appearance design. In this case, the effect is the highest if the adhesive layer 42 is opaque, but a certain effect can be obtained even if it is translucent.
[0054]
In the veneer sheet of the present invention, the configuration of the back surface side of the back gas blocking layer 3 is not limited at all. For example, when the same workability as a conventional veneer sheet in which the back surface of the veneer is lined with Japanese paper or nonwoven fabric is required, the back surface of the backside gas barrier layer 3 may be backed with Japanese paper or nonwoven fabric.
[0055]
When an adhesive process is performed on the back surface of the veneer sheet, the adhesive layer 5 may be formed on the back surface of the back gas blocking layer 3 via an appropriate backing layer, or the back surface of the back gas blocking layer 3 may be formed on the back surface of the back gas blocking layer 3. The pressure-sensitive adhesive layer 5 may be formed directly. As the pressure-sensitive adhesive in this case, for example, a conventionally known pressure-sensitive adhesive such as an acrylic-based, synthetic rubber-based, or silicone-based pressure-sensitive adhesive can be optionally used.
[0056]
Further, on the back surface of the pressure-sensitive adhesive layer 5, a release paper or a release film which has been subjected to a release treatment with a silicone compound or the like may be laminated, or the surface of the surface gas barrier layer 1 may be provided as necessary. A release treatment may be performed, and the pressure-sensitive adhesive layer 5 may be wound and used as it is on the surface gas barrier layer 1 without laminating release paper or the like.
[0057]
【Example】
Next, the present invention will be described in more detail with reference to specific examples. The present invention is not limited by these examples.
[0058]
Example 1
12 μm thick transparent ceramic-deposited polyethylene terephthalate film (manufactured by Toyobo Co., Ltd., trade name: Ecosial, moisture permeability 1 g / m ² · 24 hr or less, oxygen permeability 1 cm ³ / m ² · 24 hr · atm or less) (ceramic deposited film After the primer treatment on the deposition surface of (1), a transparent woodgrain pattern was printed using a highly transparent printing ink.
[0059]
The printed surface of the printed ceramic vapor-deposited film was adhered to the surface of a 200 μm-thick veneer plate (merapy material) using a transparent polyester-based adhesive (application amount after drying was 30 g / m ² ).
[0060]
Next, on the back surface of the veneer, a vapor-deposited surface of a 12 μm-thick aluminum-deposited polyethylene terephthalate film (moisture permeability 1 g / m ² · 24 hr or less, oxygen permeability 1 cm ³ / m ² · 24 hr · atm or less) (aluminum-deposited film) was formed. Then, a light brown and opaque colored polyester adhesive (application amount after drying was 30 g / m ² ) was used for bonding.
[0061]
Thereafter, an acrylic pressure-sensitive adhesive was applied on the back surface of the aluminum-deposited film to a thickness of 40 μm after drying, to produce a veneer sheet of the present invention.
[0062]
Example 2
In Example 1 above, instead of the ceramic vapor-deposited film, three layers each having a transparent ethylene-vinyl acetate copolymer resin layer having a thickness of 25 μm and a transparent polypropylene resin layer having a thickness of 12.5 μm laminated on both surfaces, respectively. A co-extruded biaxially stretched film (moisture permeability of about 5 g / m ² · 24 hr, oxygen permeability 1 cm ³ / m ² · 24 hr · atm or less) is used, and the other components are the same as in Example 1 above, and the veneer sheet of the present invention is used. Was prepared.
[0063]
Example 3
In Example 1 above, an aluminum foil having a thickness of 15 μm (moisture permeability 1 g / m ² · 24 hr or less, oxygen permeability 1 cm ³ / m ² · 24 hr · atm or less) was used in place of the aluminum vapor-deposited film. A veneer sheet of the present invention was produced in the same manner as in Example 1.
[0064]
Example 4
In the above Example 2, an aluminum foil having a thickness of 15 μm (moisture permeability 1 g / m ² · 24 hr or less, oxygen permeability 1 cm ³ / m ² · 24 hr · atm or less) was used in place of the aluminum vapor-deposited film. A veneer sheet of the present invention was produced in the same manner as in Example 2.
[0065]
Comparative Example 1
In the first embodiment, instead of the ceramic-deposited film, using a transparent biaxially oriented polypropylene film having a thickness of 25 [mu] m (moisture permeability of about ^{5 g} / m 2 · 24 hr or, the oxygen permeability of about ^{1500cm 3 / m2 · 24hr · atm} ) Otherwise, a veneer sheet was produced in the same manner as in Example 1 above.
[0066]
Comparative Example 2
In Example 1, instead of the ceramic vapor-deposited film, a 25 μm-thick transparent ethylene-vinyl alcohol copolymer resin film (moisture permeability: about 80 g / m ² · 24 hr, oxygen permeability 1 cm ³ / m ² · 24 hr · atm The veneer sheet was prepared in the same manner as in Example 1 except for using the following.
[0067]
Comparative Example 3
In the above Example 1, a nonwoven fabric having a basis weight of 30 g / m ² (both moisture permeability and oxygen permeability are very large and cannot be measured) was replaced with an ethylene vinyl acetate adhesive (a coating amount after drying of 30 g) instead of the aluminum vapor-deposited film. / M ² ), and a veneer sheet was prepared in the same manner as in Example 1 except for the above.
[0068]
Comparative Example 4
In Comparative Example 3, a veneer sheet was prepared in the same manner as in Comparative Example 3 except that the same polypropylene film as used in Comparative Example 1 was used instead of the ceramic vapor-deposited film.
[0069]
Discoloration resistance test The veneer sheets of Examples 1 to 4 and Comparative Examples 1 to 4 were placed in a constant-temperature and constant-humidity bath at 40 ° C and 90% RH, and after 500 hours had elapsed, the same sheets were each placed at 20 ° C and 30%. When compared with the reference sample stored in the dark place of RH (visual observation from the surface, that is, the non-adhesive processed surface), no discoloration was observed in the veneer sheets of Examples 1 to 4, whereas the comparative example The veneer sheets of Nos. 1, 2, and 4 were significantly discolored, and the veneer sheets of Comparative Example 3 exhibited moderate discoloration.
[0070]
【The invention's effect】
As described in detail above, the veneer sheet of the present invention is characterized in that the front and back surfaces of the veneer are covered with a gas barrier layer having an oxygen-blocking property and a water-vapor-blocking property. Water vapor can be prevented from entering the veneer from the outside air, so it is less prone to discoloration and corrosion even when used for a long time than conventional veneer sheets, and beautiful design utilizing the texture of veneer sheet Can be held for a long time.
[0071]
Further, by providing a sheet layer such as a synthetic resin film or a metal foil on both sides of the veneer, cracks and peeling of the veneer during processing, scratches and the like are prevented, processing suitability and ease of handling are increased, Eliminating the expansion and contraction of the veneer due to the movement of moisture between the veneer and the outside, phenomena such as floating peeling and swelling due to expansion and contraction of the veneer after sticking to the adherend substrate, see-through or thrusting of the butted portion There is a secondary effect such as the fact that it can be prevented.
[Brief description of the drawings]
FIG. 1 is a side sectional view showing an embodiment of a veneer sheet of the present invention.
FIG. 2 is a side sectional view showing an embodiment of a veneer sheet of the present invention.
[Explanation of symbols]
REFERENCE SIGNS LIST 1 surface gas blocking layer 11 synthetic resin film 111 water vapor blocking synthetic resin layer 112 oxygen blocking synthetic resin layer 12 inorganic thin film layer 13 picture layer 2 veneer 3 back gas blocking layer 31 synthetic resin film 32 metal thin film layer 33 metal foil 41 adhesion Agent layer 42 Adhesive layer 5 Adhesive layer

Claims (8)

A veneer sheet characterized in that the front and back surfaces of the veneer are covered with a gas barrier layer having an oxygen barrier property and a water vapor barrier property. ^2. The veneer sheet according to claim 1, wherein the gas barrier layer has an oxygen permeability of 100 cm ³ / m ² · 24 hr · atm or less and a moisture permeability of 10 g / m ² · 24 hr or less. 3. . 3. The veneer sheet according to claim 1, wherein, of the gas barrier layers, a surface gas barrier layer covering the front side of the veneer is transparent or translucent. 4. The surface gas blocking layer is a transparent or translucent synthetic resin film having a transparent or translucent oxygen-blocking and water vapor-blocking inorganic thin film layer formed on at least one surface thereof. Veneer sheet as described. The veneer sheet according to claim 3, wherein the surface gas barrier layer is a laminate including at least an oxygen barrier synthetic resin layer and a water vapor barrier synthetic resin layer. The veneer sheet according to any one of claims 3 to 5, wherein a transparent coloring or pattern is applied to the surface gas blocking layer. The veneer sheet according to any one of claims 1 to 6, wherein, of the gas barrier layers, a back surface gas barrier layer that covers the back side of the veneer is opaque. The veneer sheet according to claim 7, wherein the back gas blocking layer is a metal foil or a synthetic resin film having a metal thin film layer formed on at least one surface.

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