JPH09295376A - Highly flexible fancy veneer sheet suited for working with pressure sensitive adhesive - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fancy veneer sheet suited for working with a pressure sensitive adhesive which is highly flexible and pliable and is almost free from a change in size and shape when exposed to moisture absorbing and discharging conditions for a long time, and further, is stable in size and shape over time, without the generation of a clearance between adjacent sheets and the separation of the end parts of the sheet after the working with a pressure sensitive adhesive. SOLUTION: This highly flexible fancy veneer sheet 1 consists of precious wood veneer 2, an adhesive layer 3, a fibrous sheet 4, a thermoplastic resin layer 5 and a fibrous sheet 6 laminated in that order and molded. The fibrous sheet 4 has a basis weight of 150-500g/m<2> , and the fibrous sheet 6 has a basis weight of 10-100g/m<2> . Further, the thermoplastic resin layer 5 consists of a resin layer containing a cyclic polyolefin copolymer layer or a cyclic polyolefin copolymer polymer alloy layer at least, in part of the layer 5.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a decorative veneer sheet, more specifically, it has high flexibility and
The present invention relates to a highly flexible decorative veneer sheet which has improved dimensional and dimensional stability and is very suitable for adhesive construction.

The present invention can be applied to all the applications of the decorative veneer sheet described below without any particular limitation. : Building interior materials, such as wall surface materials, ceiling surface materials, column covering materials, and surface materials such as movable partitions: Surface materials for interior products of automobiles and ships: Exterior decorative materials for furniture such as chests of drawers: External cosmetics for general wooden products such as fixtures Materials: and external cosmetics for electronic devices and musical instruments.

[0003]

2. Description of the Related Art A decorative veneer sheet having a thin wood veneer as a surface material has been conventionally frequently used in the above-mentioned applications, particularly as a wall material for buildings and a surface material for furniture. One type of decorative veneer sheet currently in widespread use is a laminated sheet product that uses a resin film as part of the veneer backing material, such as wood veneer, adhesive layer, paper or non-woven fabric, A polyolefin (polypropylene or polyethylene) film and paper or non-woven fabric are laminated in this order from the uppermost layer and pressure-bonded and molded. Another type of decorative veneer sheet that has been frequently used in recent years is a laminated sheet product in which a metal foil such as iron or aluminum is used as a part of a backing material. For example, a wood veneer, an adhesive layer, a paper or a non-woven fabric, an adhesive layer, an aluminum foil, an adhesive layer and a paper or a non-woven fabric are laminated in this order from the uppermost layer and press-molded.
Further, a decorative veneer sheet using both a resin film and a metal foil as a part of a backing material has been developed.

[0004]

By the way, when the decorative veneer sheet is used for adhesive construction, that is, the decorative veneer sheet is adhered to a wall surface using an adhesive, the adhered decorative veneer sheet is used. The question is whether is good in terms of dimensional and morphological stability, in particular stability over time. That is, if the stability of the size and shape with time is poor, the decorative veneer sheet warps up and its edges are peeled off from the wall surface, etc., after some period of time after the adhesive construction. Problems such as the formation of gaps between them occur. The name wood veneer, which is the surface material of the decorative veneer sheet, generally has a high water content during adhesive installation, but since it decreases with time after drying, it shrinks in the direction orthogonal to the direction of the wood fiber after adhesive installation. Has the property of As a result, in the decorative veneer sheet, with respect to the stability of the morphology with time, the sheet end portion in the direction orthogonal to the direction of the wood fibers warps after a long period of time after the adhesive construction (to the veneer surface side). Curved). Therefore, as the veneer backing material in the decorative veneer sheet,
It is required to be a material capable of effectively suppressing the warp of the name wood veneer, which is progressively increased with the lapse of time after adhesive construction. If anything, a material that can warp the decorative veneer sheet in a direction opposite to the warp direction of the name wood veneer may be suitable as the backing material for the decorative veneer sheet.

Further, since a polyolefin film, which is a kind of conventional backing material, is generally a flexible and easily stretchable resin film, it gives sufficiently high flexibility to a decorative veneer sheet containing the same. It has an advantage that a decorative veneer sheet suitable for curved surface construction can be provided. In addition, the polyolefin film has been widely used as a backing material for a decorative veneer sheet because it has good adhesiveness with other materials and has the advantage of being easily laminated. However, the nameplate veneer, which is the surface material of the decorative veneer sheet, generally has a relatively large change in its dimensions due to moisture absorption / release, but the polyolefin film of the lining material is the expansion of such nameplate veneer. -It has a drawback of poor ability to limit shrinkage and poor dimensional stability in this sense. Therefore, when the conventional decorative veneer sheet containing a polyolefin film is used for adhesive construction, the decorative veneer sheet product (for example, length: 1 to 2 m, width: 60 to 100 cm) is used even at the stage of wet construction. Even if they are adhered to the wall surface so that they are adjacent to each other without any gap, a gap of about several mm is created by the subsequent drying after a long period of time elapses after the construction. It has had the problem that it sometimes happens between board sheets.
On the other hand, a decorative veneer sheet containing a metal foil such as an aluminum foil has improved dimensional stability in order to eliminate such defects. Since the aluminum foil has a very high rigidity, the dimensional change of the decorative veneer sheet containing the aluminum foil can be effectively suppressed. However, on the other hand, the decorative veneer sheet containing the metal foil is inferior in flexibility and lacks in flexibility.
Not necessarily a product suitable for curved surface construction. Moreover,
It also has the further disadvantage of increasing the manufacturing cost of the product.

As described above, in designing a decorative veneer sheet most suitable for surface application using an adhesive, all aspects of flexibility, dimensional stability and morphological stability are fully considered. Guided to need. That is, a decorative veneer sheet suitable for adhesive construction is a flexible sheet having high flexibility, and even when the veneer is repeatedly exposed to moisture absorption / release, the dimensional change and morphology of the veneer sheet. Are both small (there is virtually no expansion / contraction of the veneer sheet and warpage of the edges), and it is required that they have excellent stability. However, none of the decorative veneer sheets known to date can satisfy all of these requirements.

The present invention has been made in consideration of such circumstances, and has a high flexibility, and is extremely excellent in dimensional stability and morphological stability that is not easily affected by changes in moisture absorption and release of a single plate. Accordingly, it is an object of the present invention to provide a highly flexible decorative veneer sheet which has properties and is suitable for surface construction using an adhesive.

The present inventor has diligently studied on such a problem, and as a result, surprisingly, as a part of the backing material for the name wood veneer in the decorative veneer sheet, 200 to 500 have been now found.
A fibrous sheet with a high basis weight of g / m ² (for example, resin-impregnated paper) is used, and also as a part of the backing material,
A decorative veneer sheet obtained by adopting a specific thermoplastic resin layer composed of a cyclic polyolefin copolymer layer or a combination of this layer and a polyolefin layer has high flexibility and flexibility, Even if it is exposed to the moisture absorption and desorption conditions for a long time, the changes in dimensions and form are extremely small, and there is no gap after construction and the warp of the edge of the sheet does not occur. The present invention has been completed by discovering that the single-sheet sheet product is excellent and is most suitable for adhesive construction as far as the present inventors know.

[0009]

DISCLOSURE OF THE INVENTION The present invention provides a fibrous sheet having a remarkably high basis weight (thickness) as compared with the prior art, and a flexible sheet having a high tensile elastic modulus (Young's modulus) and a tensile strength. By using a combination with a thermoplastic resin layer (made of cyclic polyolefin copolymer etc.) that has a property of low elongation as a veneer lining material for decorative veneer sheet, dimensional change of the decorative veneer sheet due to moisture absorption / release In addition to suppressing (expansion and contraction), the warp of the end portion of the decorative veneer sheet (curvature toward the veneer surface side) due to drying of the veneer wood is suppressed.

More specifically, the present invention is a decorative veneer sheet formed by laminating a name wood veneer, an adhesive layer, a fibrous sheet A, a thermoplastic resin layer P and a fibrous sheet B in this order from the uppermost layer. And the fibrous sheet A is 150 to 50
The fibrous sheet B has a basis weight of 0 g / m ² and is 1
The thermoplastic resin layer P has a basis weight of 0 to 100 g / m ² , and at least a part of the thermoplastic resin layer P is formed of a resin layer including a cyclic polyolefin copolymer layer or a polymer alloy layer of the cyclic polyolefin copolymer. The present invention relates to a highly flexible decorative veneer sheet. In the above highly flexible decorative veneer sheet, the thermoplastic resin layer P is
More specifically, a cyclic polyolefin copolymer layer, a polyolefin layer / a cyclic polyolefin copolymer layer / a polyolefin layer laminate, a cyclic polyolefin copolymer / polyolefin alloy layer, and a polyolefin layer / a cyclic polyolefin copolymer / polyolefin alloy layer / a polyolefin layer The resin layer is selected from the group consisting of bodies.

As a second aspect of the present invention, a name wood veneer, an adhesive layer, a fibrous sheet C, a thermoplastic resin layer Q,
A decorative veneer sheet obtained by laminating and molding a fibrous sheet D, a thermoplastic resin layer R and a fibrous sheet E in this order from the uppermost layer, wherein the fibrous sheet D is 150 to 500 g /
has a basis weight of m ^2, and the fibrous sheet C and fibrous sheet E has a basis weight of 10 to 100 g / m ^2, further, the thermoplastic resin layer R in at least a part of an annular It also relates to a highly flexible decorative veneer sheet characterized by comprising a resin layer including a polyolefin copolymer layer or a polymer alloy layer of a cyclic polyolefin copolymer. In the highly flexible decorative veneer sheet, the thermoplastic resin layer Q is a polyolefin layer and a resin layer selected from the group consisting of a laminate of a polyolefin layer / a cyclic polyolefin copolymer layer / a polyolefin layer, and The thermoplastic resin layer R is a cyclic polyolefin copolymer layer, a polyolefin layer / cyclic polyolefin copolymer layer / polyolefin layer laminate, a cyclic polyolefin copolymer / polyolefin alloy layer, and a polyolefin layer / cyclic polyolefin copolymer / polyolefin alloy layer / polyolefin layer Is a resin layer selected from the group consisting of:

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION Each laminated element of the highly flexible decorative veneer sheet of the present invention will be described below in order. The name tree veneer in the present invention is made of various name trees, for example, 0.05 to 3.
A sawn or veneer machined to a thickness of 0 mm, preferably 0.10 to 0.4 mm. The grain of the precious wood veneer is not particularly limited, and may be any of a straight grain, an additional straight grain, a board grain, and a knob-like heather. Moreover, the tree species of the name tree veneer is not particularly limited, but examples of preferable tree species are as follows. : Japanese cypress, oak, zelkova, cherry blossoms, 楡, black persimmon, tochi, katsura, maple,
Sophora, Kusunoki, etc .: Rosewood, teak, mahogany, amber (black altar), rosewood (red sandalwood), bird's eye maple,
American Black Walnut, Claro Walnut, Latte Walnut, Queensland Walnut, Zebrawood, Mangasiro, Brazilian Rose, Karin (Pearl), Persimmon, Silverrose, Palma, Redwood, Purplewood, Silky Oak, Thai Wanks, Cherry, Magnolia, Black Leo (Dao), White Leo, Saberi, Bubinka, Macore, Madrona, Myrtle, Maple, Assin, Inbuyer, etc.

The adhesive layer is used for bonding the nameplate veneer and the fibrous sheet A or C below it. Since the bond between the name tree veneer and the fibrous sheet is relatively easy, the kind of adhesive applied in the present invention is not particularly limited. For example, ethylene vinyl acetate resin (EVA) adhesive, acetic acid A vinyl-acrylic copolymer adhesive, a water-based vinyl urethane adhesive, an acrylic pressure-sensitive adhesive, or the like can be advantageously used.

The fibrous sheet is used to correct irregularities (unevenness) on the wall surface and the like, to form a surface flush with the attached decorative veneer sheet, and also to function as a backing material for the veneer. It is used as a laminated element of a decorative veneer sheet to improve workability. In the present invention, materials conventionally used as a backing material for veneer, for example, Japanese paper, Western paper (for example, high-quality paper, medium-quality paper, etc.), kraft paper, tissue paper or resin-impregnated paper (latex resin-impregnated paper), In addition, all fibrous sheets such as various non-woven fabrics such as polyethylene non-woven fabric and polyester / pulp non-woven fabric can be applied.

The present invention is characterized in that a fibrous sheet having a remarkably high basis weight (thickness) is introduced into the decorative veneer sheet as compared with the prior art. The fibrous sheet A in the first invention and the fibrous sheet D in the second invention have a high basis weight of 150 to 500 g / m ² (that is, a thickness of approximately 0.24 to 0.90 mm). . On the other hand, the other fibrous sheets, that is, the fibrous sheet B in the first invention, and the fibrous sheet C and the E in the second invention are 10 to 100 g / m.
^It has a more conventional grammage of ² (ie, has a thickness of approximately 0.025 to 0.10 mm). When the grammage of the fibrous sheet A and the fibrous sheet D is less than 150 g / m ² , the decorative veneer sheet warps due to shrinkage of the name wood veneer due to drying after manufacturing, especially warpage of the sheet end portion. Can not be effectively suppressed and the required high morphological stability cannot be imparted to the decorative veneer sheet. On the contrary, when the basis weight exceeds 500 g / m ² , sufficient improvement in morphological stability is achieved. Although the effect is obtained, it becomes a product that is a little too thick as a decorative veneer sheet, making it difficult to perform curved surface construction, and it is unsatisfactory. From this point of view, in the present invention, the fibrous sheets A and D, which are the core materials of the decorative veneer sheet, are sheets having a basis weight of 150 to 500 g / m ² . Fibrous sheet A and fibrous sheet D
More preferably has a basis weight of 250 to 400 g / m ² . Also, other fibrous sheets are 20-60
More preferably it has a basis weight of g / m ² . Further, more preferable fibrous sheets A and D are made of resin-impregnated paper, particularly latex resin-impregnated paper.

The thermoplastic resin layer in the present invention is a soft and highly flexible resin layer, and at least a part of the thermoplastic resin layer has a high tensile elastic modulus (Young's modulus) and a tensile elongation. It is a thermoplastic resin layer that has the property of being small, and therefore can effectively suppress expansion and contraction, warp deformation, and the like of elements that are laminated together. The latter thermoplastic resin layer specifically corresponds to the thermoplastic resin layer P in the first invention and the thermoplastic resin layer R in the second invention. Both of the thermoplastic resin layer P and the thermoplastic resin layer R are, at least in part, made of a resin layer containing a cyclic polyolefin copolymer layer or a polymer alloy layer of a cyclic polyolefin copolymer. More specifically, the thermoplastic resin layer P and the thermoplastic resin layer R are, respectively, a cyclic polyolefin copolymer layer, a polyolefin layer / a cyclic polyolefin copolymer layer / a polyolefin layer laminate, a cyclic polyolefin copolymer / polyolefin alloy layer, and Polyolefin layer / Cyclic polyolefin copolymer
The resin layer is selected from the group consisting of a laminate of a polyolefin alloy layer / a polyolefin layer.

The present invention is characterized in that a cyclic polyolefin copolymer is adopted as the main material of the thermoplastic resin layer. In the present invention, the cyclic polyolefin copolymer refers to a copolymer of a cyclic olefin such as cyclodracene and an α-olefin such as ethylene or propylene. This copolymer is known per se, or by a method known per se, for example, by addition polymerization of a cyclodrecene derivative and an α-olefin in the presence of a vanadium catalyst or a metallocene catalyst, or a cyclodrecene derivative. By ring-opening polymerization under appropriate conditions, followed by reduction by hydrogenation,
Can be manufactured. Since the cyclic polyolefin copolymer is transparent because it is amorphous, it does not adversely affect the color tone and pattern of the surface of the decorative veneer sheet when applied to the laminated element of the decorative veneer sheet. Further, the cyclic polyolefin copolymer has an advantage that it has the lowest moisture permeability coefficient and also has a low water absorption coefficient. Further, the copolymer is
It has excellent resistance to acids, alkalis and water vapor. However, the most important property of the cyclic polyolefin copolymer is that the tensile elastic modulus (Young's modulus) has very little temperature dependency and moisture dependency, and the shrinkage rate is also very small, and the tensile elongation has moisture dependency. Is small. Therefore, since the thermoplastic resin layer of the present invention comprising the cyclic polyolefin copolymer layer has such characteristics, even when the decorative veneer sheet is placed in a dry environment, the decorative veneer sheet is also placed in a wet environment. Also at this time, the expansion and contraction of the veneer veneer due to moisture absorption / release and the warp deformation of the veneer sheet can be effectively suppressed. Among the cyclic polyolefin copolymers used in the present invention, the more preferable embodiment is 2.0 × 10 ² to 5.0 × 10.
^The copolymer has a tensile modulus of ² kg / mm ² and a tensile elongation of 2 to 40%. The cyclic polyolefin copolymer can be obtained from, for example, a product manufactured by Mitsui Petrochemical Co., Ltd. and sold under the brand name Apel. A representative stock name is A
PL6013, APL6509 and the like.

However, the cyclic polyolefin copolymer is
It has a drawback that the adhesiveness to fibrous sheets such as paper and resin-impregnated paper is not so good. Therefore, it is more preferable to use a layer of cyclic polyolefin copolymer as a laminating element for a decorative veneer sheet alone, rather than combining the cyclic polyolefin copolymer with other resins to form one resin film portion. It is from this point of view that the laminate of the polyolefin layer / cyclic polyolefin copolymer layer / polyolefin layer is adopted as the thermoplastic resin layer of the decorative veneer sheet in the present invention.
Here, polyolefin is used as the other resin because it is a polyolefin, particularly linear low-density polyethylene (L
LDPE) has a very good adhesiveness with the cyclic polyolefin copolymer and is a resin that can be coextrusion laminated with the cyclic polyolefin copolymer. Also,
The above-mentioned polyolefin layer may be a single resin layer, or may be composed of a plurality of resin layers of different types. The highly flexible decorative veneer sheet of the present invention includes both cases. A more preferred polyolefin layer is a laminate of a polyolefin having good adhesion with a fibrous sheet and good adhesion with a polyolefin and a cyclic polyolefin copolymer, and when the fibrous sheet is a latex resin-impregnated paper, Particularly preferred as the polyolefin layer is a laminate of ethylene ethyl acrylate random copolymer (EEA) / linear low density polyethylene (LLDPE). Other preferable polyolefin layers include ethylene vinyl acetate copolymer (EVA) / linear low density polyethylene (LLD).
Examples thereof include a laminated body of PE) or a laminated body of ionomer / linear low density polyethylene (LLDPE).

Laminated films of cyclic polyolefin copolymers and polyolefins are already known to those skilled in the art. Therefore, in the present invention, such a laminated film can be used as a material for the thermoplastic resin layer. Examples of such a laminated film include products commercially available under the name of AP-300 series from Kogaku Kogyo Co., Ltd. The series of products is a laminated film product of linear low density polyethylene (LLDPE) / cyclic polyolefin copolymer (hereinafter sometimes abbreviated as APEL) / linear low density polyethylene (LLDPE). Typical stock names are
AP-315 (LLDPE 15 μ / APEL 15 μ / LLDPE 15
μ), AP-320 (LLDPE 15 μ / APEL 20 μ / LLDPE
15μ), AP-325 (LLDPE 15μ / APEL25μ / LLDPE
15μ), AP-340 (LLDPE 10μ / APEL 40μ / LLD
PE 10μ) and AP-350 (LLDPE 10μ / APEL 50
μ / LLDPE 10 μ). Therefore, this laminated film product and other polyolefin (for example, EEA) can be laminated and used for the thermoplastic resin layer of the present invention.

Further, it is possible to further develop the method and use a polymer alloy layer of a cyclic polyolefin copolymer and another polymer, that is, a cyclic polyolefin copolymer / polyolefin alloy layer, in place of the above cyclic polyolefin copolymer layer. Is led.
Further advancing this idea, it is also possible to use a laminate of the polymer alloy and the polyolefin, for example, a three-layer laminate of polyolefin / cyclic polyolefin copolymer / polyolefin alloy / polyolefin as a resin film element. In the present invention, when the cyclic polyolefin copolymer / polyolefin alloy layer is adopted as the thermoplastic resin layer P or R of the highly flexible decorative veneer sheet, the laminated body of polyolefin / cyclic polyolefin copolymer / polyolefin alloy / polyolefin is highly improved. It also includes a case where it is adopted as the thermoplastic resin layer P or R of the flexible decorative veneer sheet.

In the present invention, more preferable cyclic polyolefin copolymer / polyolefin alloy is, for example,
(A) a polymer alloy of cyclic polyolefin copolymer and high density polyethylene (especially in a ratio of 5: 5),
(B) polymer alloys of cyclic polyolefin copolymers and low density polyethylene (especially in a ratio of 7: 3), and particularly preferred (C) cyclic polyolefin copolymers and linear low density polyethylene (particularly 9: 1). Polymer alloy. These polymer alloys are commercially available or can be produced by known methods. For example, the polymer alloy (C) can be obtained from, for example, a monolayer film product of Photochemical Industry Co., Ltd., which is marketed under the name of AP-300. When the above polymer alloy is used as a resin film element in combination with a polyolefin, the applied polyolefin has a physical / chemical correlation with a cyclic polyolefin copolymer, and is easy to coextrude. When using polymer alloy (A), it is more preferable to apply a laminate of high density polyethylene / polymer alloy (A) / high density polyethylene as a resin film element, and when using polymer alloy (B) It is more preferable to apply a laminated body of low density polyethylene / polymer alloy (B) / low density polyethylene as a resin film element, and when polymer alloy (C) is used, linear low density polyethylene / polymer alloy is used. (C) /
More preferably, a laminate of linear low density polyethylene is applied as the resin film element.

Further, in the present invention, the thermoplastic resin layer may be composed of one resin layer or one resin laminate, but two or more such thermoplastic resin layers are provided. You can also The first invention corresponds to the case where a single-layer thermoplastic resin layer is included in the decorative veneer sheet, and the second invention corresponds to the case where the single-layer thermoplastic resin layer is included in the decorative veneer sheet. To do. The second thermoplastic resin layer Q serves as a layer for assisting the function of the first thermoplastic resin layer R containing a cyclic polyolefin copolymer, or in order to obtain optimum stability, expansion and contraction of the veneer of the surface material. It functions as another layer for balancing the warp deformation and the action of the thermoplastic resin layer R for suppressing such movement. The thermoplastic resin layer Q is typically a resin layer selected from the group consisting of a polyolefin layer and a laminate of a polyolefin layer / a cyclic polyolefin copolymer layer / a polyolefin layer. More preferably, the thermoplastic resin layer Q uses the same material as the above-mentioned thermoplastic resin layers P and R, and can adopt the same laminated constitution. That is, the thermoplastic resin layer R is a polyolefin layer /
When composed of a cyclic polyolefin copolymer layer / polyolefin layer laminate, the thermoplastic resin layer Q may also be a polyolefin layer / cyclic polyolefin copolymer layer / polyolefin layer laminate. Furthermore, more preferably, the thermoplastic resin layer Q is designed to be thinner than the thermoplastic resin layer R.

More preferred thermoplastic resin layer P and thermoplastic resin layer R are a laminate of polyolefin layer / cyclic polyolefin copolymer layer / polyolefin layer or a laminate of polyolefin layer / cyclic polyolefin copolymer / polyolefin alloy layer / polyolefin layer. It is a resin layer. Particularly preferred thermoplastic resin layer P and thermoplastic resin layer R are resin layers each comprising a laminate of a polyolefin layer / a cyclic polyolefin copolymer layer / a polyolefin layer, and the cyclic polyolefin copolymer layer has a thickness of 15 to 50 μm. Is to have. Particularly preferably, the thermoplastic resin layer Q and the thermoplastic resin layer R are both formed of a laminate of a polyolefin layer / a cyclic polyolefin copolymer layer / a polyolefin layer, and most preferably in this case, a thermoplastic resin. The cyclic polyolefin copolymer layer in layer R has a thickness of 15 to 50 μm and is 10 to 3 more than the cyclic polyolefin copolymer layer in the thermoplastic resin layer Q.
This is when the layer is thicker than 5 μm.

The decorative veneer sheet according to the first aspect of the present invention is, for example, (a) first, a single resin layer or a plurality of resin layers constituting the thermoplastic resin layer P are extruded according to the extrusion lamination molding method, At the same time, two kinds of fibrous sheets A and B are overlaid on the upper side and the lower side of the resin layer P to form a laminate composed of the fibrous sheet A / thermoplastic resin layer P / fibrous sheet B, and then bonded. It can be produced by the process of applying the agent on the fibrous sheet on the upper side of the laminate, followed by the overlaying of the wood veneer on it, and then hot-pressing them all together. Further, the decorative veneer sheet according to the first invention, as another manufacturing method, (b) on the other hand, extruding a single layer or a plurality of resin layers constituting the thermoplastic resin layer P according to the extrusion lamination molding method, At the same time, one kind of fibrous sheet B is overlaid on the lower side of the resin layer to form a laminate composed of the thermoplastic resin layer P / fibrous sheet B, and on the other hand, by laminating, a name tree veneer / adhesive A veneer backing sheet composed of the agent layer / fibrous sheet A can be produced, and then the laminate and the veneer backing sheet can be hot pressed. More preferably, as the name wood veneer, a veneer whose humidity is adjusted to a water content of air dry content is used. Further, the heat-pressure adhesion is more preferably performed by a process of heat-pressing under a condition of about 125 ° C. × 3 to 9 kg / cm ² × 5 to 10 minutes, and then cooling to room temperature while maintaining the pressure. Be seen.

The decorative veneer sheet according to the second aspect of the present invention includes, for example, (c) first, a single or a plurality of resin layers constituting the thermoplastic resin layer Q and thermoplastic resin according to the extrusion lamination molding method. The single or plural resin layers constituting the resin layer R are respectively extruded, and at the same time, three kinds of fibrous sheets C,
D and E are laminated on the upper side of the resin layer Q, between the resin layers Q and R and on the lower side of the resin layer R, and the fibrous sheet C / thermoplastic resin layer Q / fibrous sheet D / heat is used. Plastic resin layer R /
A laminate consisting of the fibrous sheet E is formed, then the adhesive is applied onto the fibrous sheet on the upper side of the laminate, followed by overlaying a nameplate veneer on it and then the whole. Or a single layer constituting the thermoplastic resin layer R and a single layer constituting the thermoplastic resin layer Q according to the extrusion laminating method. Alternatively, a plurality of resin layers are respectively extruded, and at the same time, three kinds of fibrous sheets D and E are laminated between the resin layers Q and R and below the resin layer R to form a thermoplastic resin layer Q / A laminate consisting of fibrous sheet D / thermoplastic resin layer R / fibrous sheet E is molded, and on the other hand, a veneer veneer / adhesive layer / fibrous sheet C is applied as a veneer backing sheet Manufactured, and then the laminate and before It can be manufactured by a process of heat-pressing the veneer backing sheet. The more preferable moisture condition of the name wood veneer and the more preferable hot press bonding process are the same as in the case of the first invention.

Therefore, the more preferred aspect of the first invention is,
The best, among other embodiments, can be listed as follows. (i) The thermoplastic resin layer P is a laminate of a polyolefin layer / a cyclic polyolefin copolymer layer / a polyolefin layer or a laminate of a polyolefin layer / a cyclic polyolefin copolymer / polyolefin alloy layer / a polyolefin layer. (ii) The thermoplastic resin layer P is a laminate of a polyolefin layer / a cyclic polyolefin copolymer layer / a polyolefin layer, and the cyclic polyolefin copolymer layer is 15
It has a thickness of ˜50 μm, particularly preferably 25 μm. (iii) the fibrous sheet A is 250~400g / m ^2, in particular has a basis weight of 300 g / m ^2, and the basis weight of the fibrous sheet B is 20 to 60 g / m ^2, especially 30 g / m ² Have. (iv) The fibrous sheet A is made of resin-impregnated paper, particularly latex resin-impregnated paper. (v) The fibrous sheet A is 250 to 400 (particularly 300)
The fibrous sheet B has a basis weight of g / m ² and is 20 to 60.
(Particularly 30) having a basis weight of g / m ² , and the fibrous sheet A is resin impregnated paper (particularly latex resin impregnated paper)
The thermoplastic resin layer P is a laminate of a polyolefin layer / a cyclic polyolefin copolymer layer / a polyolefin layer, and the cyclic polyolefin copolymer layer has a thickness of 15 to 50 (particularly 25) μm.

Therefore, the second invention is more preferable,
The best, among other embodiments, can be listed as follows. (i) The thermoplastic resin layer Q is a polyolefin layer, and the thermoplastic resin layer R is a laminate of a polyolefin layer / a cyclic polyolefin copolymer layer / a polyolefin layer or a polyolefin layer / a cyclic polyolefin copolymer / polyolefin alloy layer / a polyolefin layer. It consists of a laminate. (ii) The thermoplastic resin layer Q is a laminate of a polyolefin layer / a cyclic polyolefin copolymer layer / a polyolefin layer, and the thermoplastic resin layer R is a polyolefin layer / a cyclic polyolefin copolymer layer / a polyolefin layer laminate or a polyolefin layer / It is composed of a laminate of cyclic polyolefin copolymer / polyolefin alloy layer / polyolefin layer. (iii) The thermoplastic resin layer Q and the thermoplastic resin layer R are both resin layers formed of a laminate of a polyolefin layer / a cyclic polyolefin copolymer layer / a polyolefin layer, and the cyclic polyolefin copolymer layer in the thermoplastic resin layer R is A layer having a thickness of 15 to 50, in particular 25 μm, and 10 to 35, in particular 10 μm thicker than the cyclic polyolefin copolymer layer in the thermoplastic resin layer Q. (iv) Fibrous sheet D is 250 to 400, especially 300 g
/ M ² basis weight and both fibrous sheet C and fibrous sheet E have a basis weight of 20 to 60, in particular 30 g / m ² . (v) The fibrous sheet D is made of resin-impregnated paper, particularly latex resin-impregnated paper. (vi) The fibrous sheet D is 250 to 400, especially 300 g
/ M ² basis weight and both fibrous sheet C and fibrous sheet E have a basis weight of 20 to 60, in particular 30 g / m ² , and said fibrous sheet D is resin impregnated paper, in particular Is made of latex resin impregnated paper, and the thermoplastic resin layer Q
Both the thermoplastic resin layer R and the thermoplastic resin layer R are resin layers formed of a laminate of a polyolefin layer / a cyclic polyolefin copolymer layer / a polyolefin layer, and the cyclic polyolefin copolymer layer in the thermoplastic resin layer R has a content of 15 to 50, particularly 2
10 to 35, especially 10 than the cyclic polyolefin copolymer layer in the thermoplastic resin layer Q having a thickness of 5 μm.
It is a layer thicker than μm.

[0028]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in more detail with reference to the embodiments shown in the drawings. It is needless to say that the illustrated embodiments are merely non-limiting examples, and that modifications and applications of these embodiments are also included in the scope of the present invention without departing from the spirit and spirit of the present invention. .

Example 1 This example represents a first inventive embodiment of the present invention.
As shown in FIG. 1, a highly flexible decorative veneer sheet 1 is a laminated veneer veneer 2, an adhesive layer 3, a fibrous sheet 4, a thermoplastic resin layer 5 and a fibrous sheet 6 laminated in this order from the uppermost layer. Molded. The name wood veneer 2 is a grain veneer of white oak and has a thickness of about 0.22 mm. The adhesive layer 3 is an adhesive layer used for bonding the veneer and the fibrous sheet, and is made of an acrylic / vinyl acetate resin emulsion. The upper fibrous sheet 4, namely fibrous sheet A, is made of latex resin-impregnated paper having a high basis weight of 300 g / m ² . On the other hand, the lower fibrous sheet 6,
That is, the fibrous sheet B is made of thin paper having a basis weight of 30 g / m ² . The thermoplastic resin layer 5, that is, the thermoplastic resin layer P is a laminated body of polyolefin layer / cyclic polyolefin copolymer layer / polyolefin layer, that is,
30 μm thick ethylene ethyl acrylate random copolymer (EEA) resin layer / 15 μm thick linear low density polyethylene (LLDPE) layer / 25 μm thick cyclic polyolefin copolymer (APEL) layer / 15 μm thick
Linear low density polyethylene (LLDPE) layer / thickness 20
It consists of a laminate of low density polyethylene (LDPE) layers of μm.

The highly flexible decorative veneer sheet 1 of this example is manufactured according to the following processing process. 1) First, according to the coextrusion inflation laminating method, the thickness of the LLDPE film is 15 μm and the thickness is 25 μm.
m APEL film and a 15 μm thick LLDPE film are stuck together to form a 15 μm thick LLDPE layer /
25 μm thick APEL layer / 15 μm thick LLDPE
A laminated film of layers is produced. As the laminated film, the above-mentioned commercial product AP-325 can also be used. 2) Next, according to the melt extrusion laminating method, LDPE molten resin is added to the laminated film (LLDPE layer / APEL layer /
Extrusion laminated between the surface of the LLDPE layer) and the surface of the fibrous sheet B to form a fibrous sheet B / thickness of 20 μm.
LDPE layer / LLDPE layer / APEL layer / LLDPE
A laminated body of layers. 3) Following the process 2), the EEA molten resin was added to the laminate (LLDPE layer / AP) according to the melt extrusion laminating method.
EL layer / LLDPE layer / LDPE layer / Fibrous sheet B)
Extruded and laminated between the surface of LLDPE and the surface of fibrous sheet A to form fibrous sheet A / E of thickness 30 μm
A laminated body of EA resin layer / LLDPE layer / APEL layer / LLDPE layer / LDPE layer / fibrous sheet B is prepared. 4) Thereafter, an adhesive of an acrylic / vinyl acetate resin emulsion is applied to the surface of the fibrous sheet A of the laminate made in the process 3), then dried, and then a white oak grain veneer is applied thereto. Overlay on top. 5) First of all, in a hot press machine,
Thermal compression is performed under the conditions of 125 ° C × 6 kg / cm ² × 10 minutes,
After that, cool to room temperature while maintaining the same pressure condition,
Then, the produced highly flexible decorative veneer sheet is taken out from the press.

Example 2 This example represents a second inventive embodiment of the present invention.
As shown in FIG. 2, the highly flexible decorative veneer sheet 11 includes a nameplate veneer 12, an adhesive layer 13, a fibrous sheet 14, a thermoplastic resin layer 15, a fibrous sheet 16, and a thermoplastic resin layer 17.
The fibrous sheet 18 is laminated and formed in this order from the uppermost layer. The nameplate veneer 12 is a grain veneer of white oak and has a thickness of about 0.22 mm. Also,
The adhesive layer 13 is a layer of an adhesive used for bonding the veneer and the fibrous sheet, and is made of an acrylic / vinyl acetate resin emulsion. The upper fibrous sheet 14, that is, the fibrous sheet C, is made of thin paper having a basis weight of 30 g / m ² . Further, the intermediate fibrous sheet 16, that is, the fibrous sheet D is made of latex resin-impregnated paper having a high basis weight of 300 g / m ² . Furthermore, the lower fibrous sheet 1
8, that is, the fibrous sheet E is made of thin paper having a basis weight of 30 g / m ² . Then, the upper thermoplastic resin layer 1
5, that is, the thermoplastic resin layer Q is a laminate of a polyolefin layer / a cyclic polyolefin copolymer layer / a polyolefin layer, that is, a low-density polyethylene (LDPE) layer having a thickness of 20 μm / a linear low-density polyethylene (LLDPE) having a thickness of 15 μm. Layer / 15 μm thick cyclic polyolefin copolymer (APEL) layer / 15 μm thick linear low density polyethylene (LLDPE) layer / 30 μm thick ethylene ethyl acrylate random copolymer (EEA)
It is composed of a laminate of resin layers. Further, the lower thermoplastic resin layer 17, that is, the thermoplastic resin layer R is a polyolefin layer /
Cyclic polyolefin copolymer layer / polyolefin layer laminate, ie 30 μm thick ethylene ethyl acrylate random copolymer (EEA) resin layer / thickness 1
5 μm linear low density polyethylene (LLDPE) layer / 25 μm thick cyclic polyolefin copolymer (APE
L) layer / linear low-density polyethylene (LL with thickness of 15 μm)
DPE layer / Low-density polyethylene (LD) with a thickness of 20 μm
It is composed of a laminate of PE) layers.

The highly flexible decorative veneer sheet 11 of this example is
Manufactured according to the following process. 1) First, according to the coextrusion inflation laminating method, the thickness of the LLDPE film is 15 μm and the thickness is 25 μm.
m APEL film and a 15 μm thick LLDPE film are stuck together to form a 15 μm thick LLDPE layer /
25 μm thick APEL layer / 15 μm thick LLDPE
A laminated film of layers is produced. Similarly, according to the coextrusion inflation laminating method, the L of 15 μm thickness is used.
The LDPE film, the APEL film having a thickness of 15 μm, and the LLDPE film having a thickness of 15 μm are bonded together,
15 μm thick LLDPE layer / 15 μm thick APEL
Laminated films of layers / 15 μm thick LLDPE layer are also produced. The commercially available product AP-315 described above can be used as the laminated film, and the commercially available product AP-325 can be used as the laminated film. 2) Next, according to the melt extrusion laminating method, LDPE molten resin is extrusion-laminated between the surface of the laminated film (LLDPE layer / APEL layer / LLDPE layer) and the surface of the fibrous sheet E to form the fibrous sheet E. / LDPE layer with thickness of 20μm / LL
It is a laminate of DPE layer / APEL layer (25 μm thick) / LLDPE layer. Similarly, according to the melt extrusion laminating method, the LDPE molten resin is added to the laminated film (LLDP).
E layer / APEL layer / LLDPE layer) and the surface of the fibrous sheet C by extrusion lamination, and the fibrous sheet C / LDPE layer having a thickness of 20 μm / LLDPE layer / AP
A laminate of EL layer (15 μm thick) / LLDPE layer is prepared. 3) Following the process 2), the EEA molten resin was added to the laminate (LLDPE layer / A) according to the melt extrusion laminating method.
PEL layer (15 μm thickness) / LLDPE layer / LDPE layer /
Extruded and laminated between the LLDPE surface of the fibrous sheet C) and the surface of the fibrous sheet D, the fibrous sheet D /
30 μm thick EEA resin layer / LLDPE layer / APEL
A laminate of layers (15 μm thick) / LLDPE layer / LDPE layer / fibrous sheet C is made up. 4) Then, following the process 3), according to the melt extrusion laminating method, EEA molten resin is added to the above-mentioned laminate (LLDPE).
Layer / APEL layer (25 μm thick) / LLDPE layer / LDP
E layer / fibrous sheet E) LLDPE surface and the laminate (fibrous sheet D / EEA resin layer / LLDPE layer / A)
PEL layer (15 μm thickness) / LLDPE layer / LDPE layer /
Extruded and laminated between the fibrous sheet C) and the surface of the fibrous sheet D to form a fibrous sheet E / LDPE layer / LLD.
PE layer / APEL layer (25 μm thickness) / LLDPE layer / 30 μm thick EEA resin layer / Fibrous sheet D / EEA resin layer / LLDPE layer / APEL layer (15 μm thickness) / LL
A laminate of DPE layer / LDPE layer / fibrous sheet C is made up. 5) After that, an acrylic / vinyl acetate resin emulsion adhesive is applied to the surface of the fibrous sheet C of the above laminate, then dried, and a white oak grain veneer is overlaid thereon. 6) In the hot press machine,
Thermal compression is performed under the conditions of 125 ° C × 6 kg / cm ² × 10 minutes,
After that, cool to room temperature while maintaining the same pressure condition,
Then, the produced highly flexible decorative veneer sheet is taken out from the press.

Example 3 This example represents a second inventive embodiment of the present invention.
The high-flexibility decorative veneer sheet 11 of this example is the same as in Example 2, with a name wood veneer 12, an adhesive layer 13, a fibrous sheet 14,
The thermoplastic resin layer 15, the fibrous sheet 16, the thermoplastic resin layer 17, and the fibrous sheet 18 are laminated and formed in this order from the uppermost layer (see FIG. 2). The nameplate veneer 12 is a grain veneer of white oak and has a thickness of about 0.22 mm. The adhesive layer 13 is a layer of an adhesive used for bonding the veneer and the fibrous sheet, and is made of an acrylic / vinyl acetate resin emulsion. The upper fibrous sheet 14, that is, the fibrous sheet C, is made of thin paper having a basis weight of 30 g / m ² . Also the intermediate fibrous sheet 1
6, that is, the fibrous sheet D is made of latex resin-impregnated paper having a high basis weight of 300 g / m ² . Further, the lower fibrous sheet 18, that is, the fibrous sheet E is 30 g.
It consists of thin paper with a basis weight of / m ² . The upper thermoplastic resin layer 15, that is, the thermoplastic resin layer Q is a polyolefin layer, that is, an ethylene ethyl acrylate random copolymer (EEA) resin layer having a thickness of 30 μm. On the other hand, the lower thermoplastic resin layer 17, that is, the thermoplastic resin layer R is a laminated body of a polyolefin layer / a cyclic polyolefin copolymer layer / a polyolefin layer, that is, an ethylene ethyl acrylate random copolymer (EEA) resin layer having a thickness of 30 μm / 15 μm thick linear low density polyethylene (LLDPE) layer / 25 μm thick cyclic polyolefin copolymer (APEL) layer / 15 thickness
It consists of a laminated body of a linear low-density polyethylene (LLDPE) layer having a thickness of 20 μm and a low-density polyethylene (LDPE) layer having a thickness of 20 μm.

The highly flexible decorative veneer sheet 11 of this example is
Manufactured according to the following process. 1) First, according to the coextrusion inflation laminating method, the thickness of the LLDPE film is 15 μm and the thickness is 25 μm.
m APEL film and a 15 μm thick LLDPE film are stuck together to form a 15 μm thick LLDPE layer /
25 μm thick APEL layer / 15 μm thick LLDPE
A laminated film of layers is produced. As the laminated film, the above-mentioned commercial product AP-325 can also be used. 2) Next, according to the melt extrusion laminating method, LDPE molten resin is added to the laminated film (LLDPE layer / APEL layer /
Extrusion laminated between the surface of the LLDPE layer) and the surface of the fibrous sheet E, and the fibrous sheet E / thickness of 20 μm
LDPE layer / LLDPE layer / APEL layer / LLDPE
Let it be a layered product (i). 3) Subsequent to the process 2), the EEA molten resin was added to the laminate (i) (LLDPE layer /
Extruded and laminated between the LLDPE surface of the APEL layer / LLDPE layer / LDPE layer / fibrous sheet E) and the surface of the fibrous sheet D to form a fibrous sheet D / thickness of 30 μm.
EEA resin layer / LLDPE layer / APEL layer / LLDP
A laminate (ii) of E layer / LDPE layer / fibrous sheet E is prepared. 4) Then, following the process 3), the EEA molten resin is added to the laminate (ii) (fibrous sheet D / EEA resin layer / LLDPE layer / APEL layer / L) according to the melt extrusion laminating method.
LDPE layer / LDPE layer / fibrous sheet E) is extruded and laminated between the surface of the fibrous sheet D and the surface of the fibrous sheet C to form a fibrous sheet E / LDPE layer / LLDPE.
A laminate (iii) of layer / APEL layer / LLDPE layer / EEA resin layer / fibrous sheet D / EEA resin layer having a thickness of 30 μm / fibrous sheet C is prepared. 5) After that, an adhesive of acrylic vinyl acetate resin emulsion is applied to the surface of the fibrous sheet C of the laminate (iii), then dried, and a white oak grain veneer is overlaid thereon. 6) In the hot press machine,
Thermal compression is performed under the conditions of 125 ° C × 6 kg / cm ² × 10 minutes,
After that, cool to room temperature while maintaining the same pressure condition,
Then, the produced highly flexible decorative veneer sheet is taken out from the press.

Each of the decorative veneer sheets 1 of Examples 1 to 3 has high flexibility, is flexible, and has a very small change in size and shape under the condition of absorbing and releasing moisture. When used for surface construction using an adhesive, no gap was formed between adjacent sheets and peeling of the sheet edge portion due to curl did not occur after a long period of time after construction.

Test Example The following six types of decorative veneer sheets were produced as samples according to the same procedures and conditions as those of the above-mentioned examples (however, the following conditions were followed for the process of thermocompression bonding), and: A warp test and a dimensional stability test were performed on these samples by the methods described below.

-Lamination constitution of each decorative veneer sheet- The lamination constitution from the uppermost layer to the lowermost layer will be described in order. Sample A: -Veneer veneer (Grade white oak grain veneer, 0.22
mm thickness) -Adhesive layer (acrylic / vinyl acetate resin emulsion) -Fibrous sheet C (thin paper, basis weight 30 g / m ² ) -Thermoplastic resin layer Q (Low density polyethylene (LDPE) layer [thickness 20 μm]
/ Linear low density polyethylene (LLDPE) layer [thickness 15
μm] / cyclic polyolefin copolymer (APEL) layer [thickness 25 μm] / linear low density polyethylene (LLDP)
E) layer [thickness 15 μm] / laminate of ethylene ethyl acrylate random copolymer (EEA) resin layer [thickness 30 μm])-Fibrous sheet D (latex resin-impregnated paper, basis weight 300)
g / m ² ) -thermoplastic resin layer R (ethylene ethyl acrylate random copolymer (E
EA) resin layer [thickness 30 μm] / linear low-density polyethylene (LLDPE) layer [thickness 15 μm] / cyclic polyolefin copolymer (APEL) layer [thickness 25 μm] / linear low-density polyethylene (LLDPE) layer [thickness 15 μm]
/ Low-density polyethylene (LDPE) layer [thickness 20 μm]
Laminated body) -Fibrous sheet E (thin paper, basis weight 30 g / m ² ) Sample B: -Name wood veneer (white oak grain grain veneer, 0.22
mm thickness) -Adhesive layer (acrylic / vinyl acetate resin emulsion) -Fibrous sheet C (thin paper, basis weight 30 g / m ² ) -Thermoplastic resin layer Q (Low density polyethylene (LDPE) layer [thickness 20 μm]
/ Linear low density polyethylene (LLDPE) layer [thickness 15
μm] / cyclic polyolefin copolymer (APEL) layer [thickness 15 μm] / linear low density polyethylene (LLDP)
E) layer [thickness 15 μm] / laminate of ethylene ethyl acrylate random copolymer (EEA) resin layer [thickness 30 μm])-Fibrous sheet D (latex resin-impregnated paper, basis weight 300)
g / m ² ) -thermoplastic resin layer R (ethylene ethyl acrylate random copolymer (E
EA) resin layer [thickness 30 μm] / linear low-density polyethylene (LLDPE) layer [thickness 15 μm] / cyclic polyolefin copolymer (APEL) layer [thickness 25 μm] / linear low-density polyethylene (LLDPE) layer [thickness 15 μm]
/ Low-density polyethylene (LDPE) layer [thickness 20 μm]
Laminate) - fibrous sheet E (thin paper, basis weight 30 g / m ²⁾ Sample C: - precious wood veneer (species White Oak straight grain veneer, 0.22
mm thickness) - adhesive layer (acrylic-vinyl acetate resin emulsion) - fibrous sheet C (thin paper, basis weight 30 g / m ²⁾ - thermoplastic resin layer Q (ethylene ethyl acrylate random copolymer (E
EA) Resin layer [thickness 30 μm])-Fibrous sheet D (latex resin-impregnated paper, basis weight 300)
g / m ² ) -thermoplastic resin layer R (ethylene ethyl acrylate random copolymer (E
EA) resin layer [thickness 30 μm] / linear low-density polyethylene (LLDPE) layer [thickness 15 μm] / cyclic polyolefin copolymer (APEL) layer [thickness 25 μm] / linear low-density polyethylene (LLDPE) layer [thickness 15 μm]
/ Low-density polyethylene (LDPE) layer [thickness 20 μm]
Laminated body) -Fibrous sheet E (thin paper, basis weight 30 g / m ² ) Sample D: -Member veneer (white oak grain veneer, 0.22
mm thickness) -Adhesive layer (acrylic / vinyl acetate resin emulsion) -Fibrous sheet A (latex resin-impregnated paper, basis weight 300)
g / m ² ) -thermoplastic resin layer P (ethylene ethyl acrylate random copolymer (E
EA) resin layer [thickness 30 μm] / linear low-density polyethylene (LLDPE) layer [thickness 15 μm] / cyclic polyolefin copolymer (APEL) layer [thickness 25 μm] / linear low-density polyethylene (LLDPE) layer [thickness 15 μm]
/ Low-density polyethylene (LDPE) layer [thickness 20 μm]
Laminated body) -Fibrous sheet B (thin paper, basis weight 30 g / m ² ) Sample E: -Name wood veneer (tree species white oak grain veneer, 0.22
mm thickness) -Adhesive layer (acrylic / vinyl acetate resin emulsion) -Fibrous sheet (latex resin-impregnated paper, basis weight 300 g)
/ M ² ) -thermoplastic resin layer (ethylene ethyl acrylate random copolymer (E
EA) Resin layer [thickness 30 [mu] m])-Fibrous sheet (thin paper, basis weight 30 g / m < ² >) Sample F: -Name wood veneer (tree species white oak grain veneer, 0.22)
mm thickness) -Adhesive layer (acrylic / vinyl acetate resin emulsion) -Fibrous sheet (latex resin-impregnated paper, basis weight 300 g)
/ M ² )

-Conditions for thermocompression bonding of each decorative veneer sheet-For each of Samples A to F, a laminate of three samples per press (note that the moisture content of the nameplate veneer is air-dried) The water content is adjusted to a water content.) Is inserted between the upper and lower hot plates through a 0.3 mm thick paper cushion in the hot press machine, and the inserted laminate is subjected to the following three conditions a. ) ~ C) by hot-press bonding to finish the decorative veneer sheet. a) Heat pressing under the conditions of 125 ° C. × 6 kg / cm ² × 2 minutes, and then cooling to room temperature with the same pressure. b) Hot pressing under the conditions of 125 ° C. × 6 kg / cm ² × 5 minutes, and then cooling to room temperature with the same pressure. c) Hot pressing under conditions of 125 ° C. × 6 kg / cm ² × 10 minutes, and then cooling to room temperature with the same pressure.

-Warp Test of Each Decorative Veneer Sheet-For each of Samples A to F, a strip 10 of decorative veneer sheet (90 mm (fiber direction of the name tree veneer) × 280 mm was measured as shown in FIG. I have two.
The name wood veneer is placed face up and left under the following atmospheric conditions for a period of time. After that, the height of the both ends of each strip is measured as a warp h (in the figure, L indicates the length of the strip after being left). a) 20 ° C. × 60% RH, left for 7 days b) 25 ° C. × 10% RH, left for 7 days RH represents relative humidity.

-Dimensional stability test of each decorative veneer sheet-For each of Samples A to F, as shown in FIG. 4, a strip 10 of decorative veneer sheet (30 mm (fiber direction of name wood veneer) x 220 mm) Each of the three surfaces has two reference lines p and q (spacing between the reference lines p and q: 180 at a distance from the strip edge).
mm). First, the strip 10 is left under the atmospheric condition of 20 ° C. × 60% RH with the surface of the name wood veneer facing up. Then, when the strip 10 reaches the equilibrium state, the length L ₁ between the reference lines p and q is measured using a reading microscope. Next, the strip 10 in equilibrium is immersed in water at 20 ° C. for 30 minutes,
Then, this is taken out from the water, and the length L ₂ between the reference lines p and q is measured using a reading microscope. Then, the dimensional change rate (%) is calculated from the length L ₁ and the length L ₂ by the following formula (I). Dimensional change rate _{(%) = (L 2 -L} 1) / L 1 × 100 (I)

-Result of Warp Test- The following Table 1 shows the result of the warp test of each sample.

[Table 1] Further, the graph of FIG. 5 shows the results when left at 20 ° C. × 60% for 7 days, and the graph of FIG.
The results are shown when left at 25 ° C. × 10% for 7 days.

-Results of Dimensional Stability Test- The following Table 2 shows the results of the dimensional stability test of each sample.

[Table 2] The graph of FIG. 7 shows the above result.

-Discussion-From Table 1, the warp of the decorative veneer sheet is C ≈ for the sample.
It can be seen that the order of increase is D <E <B <A <F.
When dried (25 ° C x 10% RH), the warpage tended to become smaller as the pressing time became longer (see Fig. 6). In addition, it can be seen from Table 2 that the dimensional change rate of the decorative veneer sheet increases in the order of A <B <C <D <E <F for the sample. That is, A, B, C, D,
In the order of E and F, it is recognized that the laminated structure has a larger dimensional change due to moisture absorption / release. From the same table, it is also confirmed that the value of the dimensional change rate is not significantly affected by the condition of thermocompression bonding.

From the above results, regarding the dimensional change rate,
The larger the thickness of the thermoplastic resin layer, especially the cyclic polyolefin copolymer (APEL) layer therein, the smaller it is, and thus the greater the cyclic polyolefin copolymer layer is, the more the dimensional stability is improved. Relationship is guided. Regarding warpage prevention, it is recognized that the following relationship holds. From this table and Table 1, the relationship that the greater the thickness of the cyclic polyolefin copolymer layer on the lining side (APEL layer in the thermoplastic resin layer R) is, the more improved the effect of preventing warpage is derived. When the thickness of the cyclic polyolefin copolymer layer (APEL layer in the thermoplastic resin layer Q) on the nameplate veneer side is made thinner than 10 to 35 μm than the thickness of the cyclic polyolefin copolymer layer on the lining side, warpage It is recognized that such a laminated construction is also a preferred embodiment, since the prevention effect is improved.

[0045]

As described above, according to the present invention,
It has high flexibility, is flexible, and also absorbs moisture from a single plate.
Even if it is exposed to moisture for a long time, the changes in dimensions and morphology are very small, there is no gap between adjacent sheets due to shrinkage after construction, and there is no peeling of the sheet edge due to curling. A highly flexible decorative veneer sheet is provided which has excellent dimensional and morphological stability over time that is not affected by moisture absorption and desorption changes of the veneer, and thus is particularly suitable for surface application using adhesive. It

[Brief description of drawings]

FIG. 1 is an enlarged sectional view showing a highly flexible decorative veneer sheet of Example 1 of the present invention.

FIG. 2 is an enlarged cross-sectional view showing a highly flexible decorative veneer sheet of Examples 2 and 3 of the present invention.

FIG. 3 is a diagram showing a process of a warp test of a decorative veneer sheet.

FIG. 4 is a plan view showing a strip of a decorative veneer sheet used for testing dimensional stability.

FIG. 5 is a graph showing the results of a warp test of a decorative veneer sheet.

FIG. 6 is a graph showing the results of a warp test of a decorative veneer sheet under different temperature and humidity conditions.

FIG. 7 is a graph showing the results of a dimensional stability test of a decorative veneer sheet.

[Explanation of symbols]

 1 highly flexible decorative veneer sheet 2 name wood veneer 3 adhesive layer 4 fibrous sheet A 5 thermoplastic resin layer P 6 fibrous sheet B 10 strip of decorative veneer sheet 11 highly flexible decorative veneer sheet 12 Name tree veneer 13 Adhesive layer 14 Fibrous sheet C 15 Thermoplastic resin layer Q 16 Fibrous sheet D 17 Thermoplastic resin layer R 18 Fibrous sheet E

Claims (15)

[Claims] 1. A name wood veneer, an adhesive layer, a fibrous sheet A,
A decorative veneer sheet obtained by laminating a thermoplastic resin layer P and a fibrous sheet B in this order from the uppermost layer, wherein the fibrous sheet A has a basis weight of 150 to 500 g / m ² , and The fibrous sheet B has a basis weight of 10 to 100 g / m ² , and the thermoplastic resin layer P is at least partially formed from a resin layer including a cyclic polyolefin copolymer layer or a polymer alloy layer of the cyclic polyolefin copolymer. The highly flexible decorative veneer sheet characterized by the following. 2. The thermoplastic resin layer P is a cyclic polyolefin copolymer layer, a laminate of a polyolefin layer / a cyclic polyolefin copolymer layer / a polyolefin layer, a cyclic polyolefin copolymer / polyolefin alloy layer,
And a resin layer selected from the group consisting of a laminate of polyolefin layer / cyclic polyolefin copolymer / polyolefin alloy layer / polyolefin layer.
The highly flexible decorative veneer sheet described. 3. The thermoplastic resin layer P is a laminate of a polyolefin layer / a cyclic polyolefin copolymer layer / a polyolefin layer or a resin layer comprising a laminate of a polyolefin layer / a cyclic polyolefin copolymer / polyolefin alloy layer / a polyolefin layer, The highly flexible decorative veneer sheet according to claim 2. 4. The thermoplastic resin layer P is a resin layer composed of a laminate of a polyolefin layer / a cyclic polyolefin copolymer layer / a polyolefin layer, and the cyclic polyolefin copolymer layer has a thickness of 15 to 50 μm.
The highly flexible decorative veneer sheet according to claim 3. 5. The fibrous sheet A is 250 to 400 g.
/ M ² basis weight, and the fibrous sheet B is 20 ~
The highly flexible decorative veneer sheet according to claim 1, which has a basis weight of 60 g / m ² . 6. The highly flexible decorative veneer sheet according to claim 1, wherein the fibrous sheet A is made of resin-impregnated paper. 7. The fibrous sheet A is 250 to 400 g.
/ M ² basis weight, and the fibrous sheet B is 20 ~
The fibrous sheet A has a basis weight of 60 g / m ² , and the fibrous sheet A is made of resin-impregnated paper, and the thermoplastic resin layer P is
Polyolefin layer / Cyclic polyolefin copolymer layer /
The highly flexible decorative veneer sheet according to any one of claims 1 to 6, which is a resin layer formed of a laminate of polyolefin layers, wherein the cyclic polyolefin copolymer layer has a thickness of 15 to 50 µm. . 8. A name wood veneer, an adhesive layer, a fibrous sheet C,
Thermoplastic resin layer Q, fibrous sheet D, thermoplastic resin layer R
And a decorative veneer sheet obtained by laminating and forming a fibrous sheet E in this order from the uppermost layer, wherein the fibrous sheet D has a basis weight of 150 to 500 g / m ² , and the fibrous sheet C and Fibrous sheet E is 10 to 100 g / m ²
And a thermoplastic resin layer R at least partially formed of a resin layer containing a cyclic polyolefin copolymer layer or a polymer alloy layer of a cyclic polyolefin copolymer. Makeup veneer sheet. 9. The thermoplastic resin layer Q is a resin layer selected from the group consisting of a polyolefin layer and a laminate of a polyolefin layer / a cyclic polyolefin copolymer layer / a polyolefin layer, and the thermoplastic resin layer R
Is a cyclic polyolefin copolymer layer, a polyolefin layer / a cyclic polyolefin copolymer layer / a polyolefin layer laminate, a cyclic polyolefin copolymer / polyolefin alloy layer, and a polyolefin layer / a cyclic polyolefin copolymer / polyolefin alloy layer / a polyolefin layer laminate. The highly flexible decorative veneer sheet according to claim 8, which is a selected resin layer. 10. The thermoplastic resin layer Q is a resin layer composed of a polyolefin layer, and the thermoplastic resin layer R is a laminate of polyolefin layer / cyclic polyolefin copolymer layer / polyolefin layer or polyolefin layer / cyclic polyolefin copolymer. The highly flexible decorative veneer sheet according to claim 9, which is a resin layer made of a laminate of a polyolefin alloy layer / a polyolefin layer. 11. The thermoplastic resin layer Q is a resin layer composed of a laminate of a polyolefin layer / a cyclic polyolefin copolymer layer / a polyolefin layer, and the thermoplastic resin layer R is a polyolefin layer / a cyclic polyolefin copolymer layer / a polyolefin. The highly flexible decorative veneer sheet according to claim 9, which is a resin layer comprising a laminated body of layers or a laminated body of a polyolefin layer / a cyclic polyolefin copolymer / polyolefin alloy layer / a polyolefin layer. 12. The thermoplastic resin layer Q and the thermoplastic resin layer R are both resin layers made of a laminate of a polyolefin layer / a cyclic polyolefin copolymer layer / a polyolefin layer, and the thermoplastic resin layer R contains The highly flexible decorative veneer according to claim 11, wherein the cyclic polyolefin copolymer layer has a thickness of 15 to 50 µm and is thicker than the cyclic polyolefin copolymer layer in the thermoplastic resin layer Q by 10 to 35 µm. Sheet. 13. The fibrous sheet D is 250 to 400.
The highly flexible decorative veneer sheet according to claim 8, which has a basis weight of g / m ² and both of the fibrous sheet C and the fibrous sheet E have a basis weight of 20 to 60 g / m ² . 14. The highly flexible decorative veneer sheet according to claim 8, wherein the fibrous sheet D is made of resin-impregnated paper. 15. The fibrous sheet D is 250 to 400.
has a basis weight of g / m ² and the fibrous sheet C and the fibrous sheet E Both had a basis weight of 20 to 60 g / m ^2, and the fibrous sheet D is made of resin-impregnated paper, In addition, the thermoplastic resin layer Q and the thermoplastic resin layer R
Is a resin layer composed of a laminate of a polyolefin layer / a cyclic polyolefin copolymer layer / a polyolefin layer, wherein the cyclic polyolefin copolymer layer in the thermoplastic resin layer R has a thickness of 15 to 50 μm, and A layer thicker than the cyclic polyolefin copolymer layer in the resin layer Q by 10 to 35 μm.
4. The highly flexible decorative veneer sheet according to any one of 4 above.