JPH063607U

JPH063607U - Laminate

Info

Publication number: JPH063607U
Application number: JP8857791U
Authority: JP
Inventors: 星一渡辺
Original assignee: 株式会社ノダ
Priority date: 1991-08-05
Filing date: 1991-08-05
Publication date: 1994-01-18
Anticipated expiration: 2006-08-05
Also published as: JP2521408Y2

Abstract

(57)【要約】（修正有）【構成】木質繊維層３を芯としその表裏面に木削片層２
ａ，２ｂと木質単板層１ａ，１ｂが一定方向に配向され
ると共に、その配向方向が木質単板層の繊維方向と平行
方向とならないように積層一体化されてなる積層板。【効果】芯材として木質繊維層３及び木削片層２ａ，２
ｂ等の工業材料を使用しているので、板厚及び表面平滑
性が共に均質な材料であり、得られる積層板の表面性に
優れ、また、資源の有効利用となり、さらに吸放湿によ
る収縮膨張が隣接する層間で抑制し合い著しく小さくな
り寸法安定性に優れるとともに機械的強度の向上も図る
ことができる。 (57) [Summary] (Corrected) [Constitution] Wood fiber layer 3 is the core, and wood cutting layer 2 is on the front and back sides.
a, 2b and wood veneer layers 1a, 1b are oriented in a fixed direction, and are laminated and integrated so that the orientation direction is not parallel to the fiber direction of the wood veneer layer. [Effect] The wood fiber layer 3 and the wood shaving layers 2a, 2 as core materials
Since it uses industrial materials such as b, it is a material with uniform plate thickness and surface smoothness, and the resulting laminate has excellent surface properties. It also makes effective use of resources and further shrinks due to moisture absorption and desorption. Expansion is suppressed between the adjacent layers to be remarkably reduced, and the dimensional stability is excellent and the mechanical strength can be improved.

Description

【考案の詳細な説明】[Detailed description of the device]

【０００１】[0001]

【産業上の利用分野】[Industrial applications]

本考案は、構造材料を始め建築の表装、内装および家具等に使用される積層板に関する。 The present invention relates to a laminated board used for structural materials, as well as for building exteriors, interiors and furniture.

【０００２】[0002]

【従来技術】[Prior art]

積層板は、単板をその繊維方向を互いに直交にさせて積層接着した合板、単板の繊維方向を同一方向に積層接着した平行合板（Ｌ．Ｖ．Ｌ．）などが知られており、挽材では得られない大きな寸法の板を多量に安定して供給することができ、しかも寸法安定性にも優れているなど、現在の建築材料の一材料としてなくてはならないものである。 Laminated boards are known such as plywood in which single fibers are laminated and bonded with their fiber directions orthogonal to each other, and parallel plywood (L.V.L.) in which the fiber directions of single plates are laminated and bonded in the same direction. It is an indispensable part of today's building materials because it can stably supply a large amount of large-sized boards that cannot be obtained from sawn timber and has excellent dimensional stability.

【０００３】[0003]

【考案が解決しようとする課題】[Problems to be solved by the device]

しかしながら、この合板は、天然木材を薄く剥ぎ取った単板を積層接着し製造するため、天然資源の枯渇問題が世界的に大きく取り上げられ、原材料である原木を伐採することが困難になると共に、原木の質が低下することによって、単板に使用する良質の単板を多量に得ることが難しくなり、品質の良い合板を多量に市場に供給することが困難となる。この問題は今後ますます深刻化することが予測され、合板に代わる代替え品の提供が熱望されている。 However, since this plywood is manufactured by laminating and bonding veneer from which thin pieces of natural wood have been peeled off, the problem of depletion of natural resources has been widely taken up worldwide, and it has become difficult to cut down raw materials that are raw materials. As the quality of raw wood deteriorates, it becomes difficult to obtain a large amount of good quality veneer used for veneer, and it becomes difficult to supply a large amount of good quality plywood to the market. It is predicted that this problem will become more serious in the future, and there is a strong desire to provide an alternative to plywood.

【０００４】[0004]

【課題を解決するための手段】[Means for Solving the Problems]

本考案は、合板の代替え品として使用できる新規な積層板を提供することを目的として鋭意工夫の結果完成されたものである。 The present invention has been completed as a result of earnest efforts for the purpose of providing a novel laminated plate that can be used as a substitute for plywood.

【０００５】すなわち本考案は、図１に示すように木質繊維層３を芯としてその表裏面に木削片層２ａ，２ｂと木質単板層１ａ，１ｂとが積層一体化されてなる積層板である。That is, according to the present invention, as shown in FIG. 1, a laminated plate having a wood fiber layer 3 as a core and wood shaving layers 2a and 2b and wood veneer layers 1a and 1b are laminated and integrated on the front and back surfaces thereof. Is.

【０００６】積層板の芯となる木質繊維層３は、原木廃材を切削した木材チップを常法により解繊して得られる木質繊維を圧締成型したハードボード、ＭＤＦ、インシュレーションボード等を用いることができる。The wood fiber layer 3 which is the core of the laminated board is a hardboard, MDF, insulation board, etc. obtained by pressing and molding wood fibers obtained by defibrating wood chips obtained by cutting waste raw wood by a conventional method. Can be used.

【０００７】木削片層２ａ，２ｂとしては例えば、原木を切削して得られるチップ状、フレーク状、ストランド状の木削片を圧締成型したパーティクルボード、ＯＳＢ、ウエハーボード等からなるものを用いることができる。この木削片層２ａ，２ｂは、その製造過程において木削片を落下堆積させて木削片のマットを作る際に、木削片の繊維方向を一定方向に配向させたものをプレス成形して得られたものが好ましい。The wood shaving layers 2a and 2b are made of, for example, particle boards, OSBs, wafer boards, etc. obtained by press-molding chips, flakes, and strands of wood shavings obtained by cutting raw wood. Any thing can be used. The wood shaving layers 2a and 2b are formed by press-molding the wood shavings with the fiber direction oriented in a fixed direction when the wood shavings are dropped and deposited in the manufacturing process to form a wood shaving mat. What is obtained is preferred.

【０００８】また表裏面に積層される木質単板層１ａ，１ｂとしては広葉樹単板、針葉樹単板を用いることができる。表面側木質単板層１ａと裏面側木質単板層１ｂの繊維方向は一般に合板を構成する際の表裏単板と同様に互いにその繊維方向が平行となるように構成される。As the wood veneer layers 1a and 1b laminated on the front and back surfaces, a hardwood veneer and a softwood veneer can be used. The fiber directions of the front-side wood veneer layer 1a and the back-side wood veneer layer 1b are generally configured such that the fiber directions thereof are parallel to each other, similarly to the front and back veneers when forming plywood.

【０００９】さらに一定の配向方向を有する木削片層２ａ，２ｂと木質単板層１ａ，１ｂを積層する際に、表裏面に積層される木質単板層１ａ，１ｂの繊維方向とこの木削片の配向方向とが平行方向にならないように積層する。好ましくは、直交するように積層する。表裏面に積層する木質単板層１ａ，１ｂは、吸放湿することにより、単板の繊維方向に平行方向の収縮膨張に比べ、繊維方向に垂直方向の収縮膨張が５から２０倍と大きく、繊維方向に対し平行方向と垂直方向との変化率が大きく異なる。Further, when laminating the wood shaving layers 2a, 2b having a certain orientation direction and the wood veneer layers 1a, 1b, the fiber directions of the wood veneer layers 1a, 1b to be laminated on the front and back surfaces and this tree. Stack them so that the orientation of the chips is not parallel. Preferably, the layers are laminated so that they are orthogonal to each other. By absorbing and releasing moisture, the wood veneer layers 1a and 1b laminated on the front and back surfaces have a contraction expansion of 5 to 20 in the direction perpendicular to the fiber direction as compared with contraction expansion in the direction parallel to the fiber direction of the veneer. It is twice as large, and the rate of change in the direction parallel to the fiber direction and in the direction perpendicular to the fiber direction is very different.

【００１０】これに対し、木削片層２ａ，２ｂの木削片の繊維方向を一定方向に配向させることにより木質単板に近い性質となり、木削片層２ａ，２ｂの吸放湿による収縮膨張も、繊維方向に平行方向の収縮膨張に対し、繊維方向に垂直方向の収縮膨張が大きいため、これら木質単板層１ａ，１ｂおよび木削片層２ａ，２ｂ単独では吸放湿による寸法変化が繊維方向に対し垂直方向の収縮膨張が特に大きいものであるが、これら２層の木質単板層１ａ，１ｂと木削片層２ａ，２ｂとの繊維方向が平行とならないように積層することにより、吸放湿により生ずる収縮膨張が隣接板材間でお互いに拘束し合い著しく抑制される。この抑制効果は繊維方向を直交させて積層した状態が特に優れたものとなり、収縮膨張に起因する反りやねじれを防止することができる。On the other hand, by orienting the fiber directions of the wood shavings layers 2a and 2b in a fixed direction, the wood shavings layers 2a and 2b have properties close to those of a wood veneer and the wood shavings layers 2a and 2b shrink due to moisture absorption and release. As for the expansion, the contraction and expansion in the direction perpendicular to the fiber direction is larger than the contraction and expansion in the direction parallel to the fiber direction. Therefore, these wood veneer layers 1a and 1b and the wood shaving layers 2a and 2b alone have a dimensional change due to moisture absorption and desorption. Has a particularly large contraction / expansion in the direction perpendicular to the fiber direction, but the two wood veneer layers 1a, 1b and the wood shaving layers 2a, 2b should be laminated so that the fiber directions are not parallel. As a result, the contraction and expansion caused by moisture absorption and desorption are restrained between the adjacent plate materials and are significantly suppressed. This suppressing effect is particularly excellent when the fibers are laminated so that the fiber directions are directly intersected with each other, and warpage and twisting due to contraction and expansion can be prevented.

【００１１】また、芯材として積層される木質繊維層３は、含水率１％当たりの寸法変化率が長さ方向と幅方向が均等で０．０３〜０．０４％と優れた安定性を有するものであるため、木質単板層１ａ，１ｂと木削片層２ａ，２ｂ同志の収縮膨張の抑制作用に、木質繊維層３の安定性が加えられることにより、さらに寸法安定性に優れた性質を有する積層板となる。これは、吸放湿による寸法変化率が含水率１％当たり０．０２〜０．０３％という優れた寸法安定性を有する合板の性能に匹敵するものである。Further, the wood fiber layer 3 laminated as the core material has an excellent stability that the dimensional change rate per 1% of water content is 0.03 to 0.04% evenly in the length direction and the width direction. Since the wood veneer layers 1a, 1b and the wood shaving layers 2a, 2b suppress the contraction and expansion of the wood veneer layers 1a, 1b, the stability of the wood fiber layer 3 is added to further improve the dimensional stability. It becomes a laminated plate having excellent properties. This is comparable to the performance of plywood, which has excellent dimensional stability with a dimensional change rate of 0.02 to 0.03% per 1% water content due to moisture absorption and desorption.

【００１２】また、機械的強度の面においても、木質単板の繊維方向に平行方向に曲げ強度が強いという性質と、木削片層２ａ，２ｂの木削片の配向方向に平行方向に曲げ強度が強いという性質が、繊維方向を平行とならないように積層することにより、得られる積層板の長さ方向および幅方向共に優れた機械強度を有するものである。Also in terms of mechanical strength, the bending strength is strong in the direction parallel to the fiber direction of the wood veneer, and the bending direction is parallel to the orientation direction of the wood cutting pieces layers 2a and 2b. The property that the strength is high is that by laminating so that the fiber directions are not parallel to each other, the resulting laminate has excellent mechanical strength in both the length direction and the width direction.

【００１３】本考案の積層板は、例えば、予め製造した木質単板層１ａ，１ｂ、木削片層２ａ，２ｂおよび木質繊維層３を、接着剤を介してその木質単板層１ａ，１ｂの繊維方向と木削片の配向方向が平行とならないように積層し、常法に従い熱圧プレスすることにより得られる、あるいは、木削片を堆積し木削片マット層を形成し、その上に同様に木質繊維を堆積し木質繊維マット層を形成し、さらにその上に木削片を堆積し木削片マット層を形成したものを、一括して熱圧プレスすることにより木質繊維層３を芯としてその表裏に木削片層２ａ，２ｂが積層一体化された積層板を得、その表裏に接着剤を介して木質単板層１ａ，１ｂを接着することによっても得られる。In the laminated board of the present invention, for example, the wood veneer layers 1a, 1b, the wood shaving layers 2a, 2b and the wood fiber layer 3 which have been manufactured in advance are attached to the wood veneer layer 1a, It can be obtained by laminating the fiber direction of 1b and the orientation direction of the wood shavings so that they are not parallel to each other, and heat-pressing them according to a conventional method, or depositing the wood shavings to form a wood shaving mat layer. Similarly, wood fibers are deposited on top of this to form a wood fiber mat layer, and then wood chips are deposited on it to form a wood chip mat layer. It is also obtained by using the fiber layer 3 as a core to obtain a laminated board in which the wood cutting pieces layers 2a and 2b are laminated and integrated on the front and back sides, and by adhering the wood veneer layers 1a and 1b to the front and back sides with an adhesive. .

【００１４】このようにして得られた積層板の表面に必要により化粧シートを接着する。接着する化粧シートとしては、例えば、厚み０．２−３ｍｍ程度の天然木材を切削して得られる天然薄単板、２０−４０ｇ／ｍ^２の化粧紙、３２−５００ｇ／ｍ^２の不織布５０ｇ／ｍ^２のパーチメント紙等の柄模様印刷や単色の塗装が施されたものを用いることができる。あるいは、化粧シート接着後、上塗り工程を設けることもできる。化粧シートの接着は、熱可塑性接着剤例えば酢酸ビニル樹脂等に耐水性向上のために熱硬化性化粧樹脂または尿素粉末等を混入したものを用いることができる。If necessary, a decorative sheet is attached to the surface of the thus obtained laminated plate. Examples of the decorative sheet to be adhered include natural thin veneer obtained by cutting natural wood having a thickness of about 0.2-3 mm, 20-40 g / m ² decorative paper, 32-500 g / m ² non-woven fabric 50 g. / M ² parchment paper or the like on which pattern pattern printing or monochromatic coating is applied can be used. Alternatively, an overcoating step can be provided after adhering the decorative sheet. For the adhesion of the decorative sheet, a thermoplastic adhesive such as vinyl acetate resin mixed with a thermosetting decorative resin or urea powder for improving water resistance can be used.

【００１５】[0015]

【考案の効果】[Effect of device]

芯材として木質繊維層３および木削片層２ａ，２ｂ等の工業材料を使用しているので、板厚および表面平滑性が共に均質な材料であり、得られる積層板の表面性が優れている。 Since the wood fiber layer 3 and the wood shaving layer 2a, 2b and other industrial materials are used as the core material, both the plate thickness and the surface smoothness are uniform materials, and the surface properties of the resulting laminated plate are excellent. There is.

【００１６】また、これら芯材として用いる木質繊維層３および木削片層２ａ，２ｂは、単板として使用できない欠点のある原木を小さく破砕あるいは解繊したものを用いて得られるものであるため、資源の有効利用となり自然破壊の防止に役立つことができる。Further, the wood fiber layer 3 and the wood shaving layers 2a and 2b used as the core material are obtained by crushing or defibrating a raw wood having a defect that cannot be used as a single plate into small pieces. It can also be an effective use of resources and prevent the destruction of nature.

【００１７】さらに、表裏面の木質単板層１ａ，１ｂの繊維方向と、その内側に積層する、木削片層２ａ，２ｂの木削片の配向方向が平行とならないように積層することで、吸放湿による収縮膨張が隣接する層間で抑制し合い著しく小さくなる。Furthermore, by laminating the wood veneer layers 1a, 1b on the front and back sides so that the fiber directions of the wood veneer layers 2a, 2b laminated inside thereof are not parallel to each other. , The contraction and expansion due to moisture absorption and desorption are suppressed between the adjacent layers and become extremely small.

【００１８】また、中心に位置する木質繊維層３は、寸法変化率が長さ方向と幅方向が均等で優れた安定性を有するものであるため、木質単板層１ａ，１ｂと木削片層２ａ，２ｂ同志の収縮膨張の抑制作用に、木質繊維層３の安定性が加えられることにより、さらに寸法安定性に優れた性質を有する積層板となる。さらに、木質単板層１ａ，１ｂと木削片層２ａ，２ｂの繊維方向が平行とならないように積層することにより、機械的強度の向上も図られるものである。Further, since the wood fiber layer 3 located at the center has excellent dimensional change rate in the length direction and the width direction and has excellent stability, the wood veneer layers 1a and 1b and the wood shavings are cut. Since the stability of the wood fiber layer 3 is added to the contraction / expansion suppressing action of the layers 2a and 2b, the laminated plate has further excellent dimensional stability. Further, by laminating the wood veneer layers 1a, 1b and the wood shaving layers 2a, 2b so that the fiber directions thereof are not parallel to each other, the mechanical strength can be improved.

【図面の簡単な説明】[Brief description of drawings]

【図１】５層構造の場合の積層板断面図、FIG. 1 is a sectional view of a laminated plate having a five-layer structure,

【符号の説明】[Explanation of symbols]

１ａ，１ｂ：木質単板層、２ａ，２ｂ：木削片層、３：
木質繊維層。1a, 1b: wood veneer layer, 2a, 2b: wood shaving layer, 3:
Wood fiber layer.

Claims

【実用新案登録請求の範囲】[Scope of utility model registration request]

【請求項１】木質繊維層を芯としその表裏面に木削片
層と木質単板層とが順次、積層一体化されてなることを
特徴とする積層板。1. A laminate comprising a wood fiber layer as a core, and a wood shaving layer and a wood veneer layer sequentially laminated on the front and back surfaces thereof.

【請求項２】木削片層の木削片が一定方向に配向され
ると共に、その配向方向が、木質単板層の繊維方向と平
行方向とならないよう積層一体化されてなる請求項１記
載の積層板。2. The wood shavings of the wood shaving layer are oriented in a fixed direction, and are laminated and integrated so that the orientation direction is not parallel to the fiber direction of the wood veneer layer. Laminated board.