JPH0821071A - Composite floor material - Google Patents

Composite floor material

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Publication number
JPH0821071A
JPH0821071A JP18506494A JP18506494A JPH0821071A JP H0821071 A JPH0821071 A JP H0821071A JP 18506494 A JP18506494 A JP 18506494A JP 18506494 A JP18506494 A JP 18506494A JP H0821071 A JPH0821071 A JP H0821071A
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JP
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Patent type
Prior art keywords
surface
sheet
substrate
base plate
floor
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP18506494A
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Japanese (ja)
Inventor
Hisashi Hagiwara
Katsuhiko Serizawa
勝彦 芹沢
寿 萩原
Original Assignee
Noda Corp
株式会社ノダ
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Abstract

PURPOSE:To provide a floor board difficult to chamfer by sticking a decorative sheet on the surface of a woody base plate, and sticking a lining sheet on the reverse side. CONSTITUTION:A damping layer 2 is stuck to the surface of a floor board base plate 3. A decorative sheet 1a is stuck to the surface of a woody base plate 1b. A lining sheet 1c is stuck to the reverse side, the surface base plate 1 is laminated and integrated to form a composite material. Even when the surface of the surface base plate 1 is contracted or expanded by the change of water content in the decorative sheet 1a, the lining sheet 1c on the reverse side is similarly contracted and expanded, so that the contraction and expansion on both the surfaces can be well-balanced. Further, even when the woody base plate 1b is contracted or expanded by the water content change, the contraction and expansion is evenly constrained from both the surfaces by the decorative sheet 1a and the lining sheet 1c. Thus, the problem that only the surface base plate 1 is chamfered regardless of the floor board base plate 3.

Description

【発明の詳細な説明】 DETAILED DESCRIPTION OF THE INVENTION

【0001】 [0001]

【産業上の利用分野】本発明は床板に関する。 The present invention relates to a floor plate.

【0002】 [0002]

【従来技術】従来、床板基板の表面に合成樹脂発泡体等の制振層を介在させ表面基板を積層一体化させた構造により、重量物を載置した際の床板の沈みの問題や歩行感の悪さを解決し、優れた防音性能を有する床材が知られている。 BACKGROUND Conventionally, a structure in which the surface substrate is interposed is integrally laminated damping layer such as a synthetic resin foam on the surface of the floor board, problems or walking feeling sinking floorboards when placing the heavy the poor solves the known floor material having excellent soundproof performance. (実公平4−12202号、実公平4−523 (Real fairness 4-12202 issue, the real fair 4-523
51号公報参照) See JP 51)

【0003】 [0003]

【発明が解決しようとする課題】しかし、このような床板の表面基板において、その表面に化粧層を形成するため、木質基板の表面に化粧単板を貼着したものが一般に用いられる。 [SUMMARY OF THE INVENTION However, in the surface substrate such floorboards, in order to form a decorative layer on its surface, obtained by attaching a decorative veneer on the surface of the wood substrate is generally used. しかしながらその後の長期間の各板材の含水率の変化により収縮膨張が起こり、加えて床板基板と表面基板の間の制振材が伸縮性に富んだものであることから、床板基板とは無関係に制振材より表面側の表面基板においてのみ反りが生じやすいという問題を有していた。 However occur subsequent prolonged contraction and expansion due to changes in the moisture content of the sheet, added since the damping material between the floor board and the surface substrate is of rich stretchability, regardless of the floor plate substrate warp had a problem that tends to occur only at the surface the substrate surface side of the damping material.

【0004】特に、床板基板のみに実加工を施した床板においては、床板が施工された状態の表面基板は制振材を介して床板基板に固定されているだけであるため、床板基板とは無関係に表面基板に反りが生じた場合、この反りを直す手段がなく、床板全体を張り替える必要が生ずるものである。 In particular, in the floor plate subjected to actual machining only floor plate substrate, the surface substrate in the state floorboards are construction is merely fixed to the floor plate substrate through the damping material, floor board and the regardless if warpage occurs in the surface substrate, there is no means to fix the warp, but the need arises to Harikaeru the entire floor.

【0005】 [0005]

【課題を解決するための手段】本発明は、このような問題点に鑑み、反りが生じにくい床板を提供すべく鋭意研究を重ねた結果、本発明を完成するに至ったものである。 The present invention SUMMARY OF THE INVENTION In view of such problems, as a result of warping intensive studies to provide a hard floor to occur, has been led to completion of the present invention. すなわち本発明は、床板基板3の表面に、制振層2 That is, the present invention, the surface of the floor board 3, the damping layer 2
を介在させて表面基板1が積層一体化されてなる複合床材において、表面基板1が木質基板の表面側に化粧シート1aが貼着されるとともに、裏面側に裏打ちシート1 In a composite floor which the surface substrate 1 interposed therebetween are laminated integrated, together with the surface substrate 1 is adhered decorative sheet 1a is on the surface side of the wood substrate, the backing sheet 1 on the back side
cが貼着されてなることを特徴とする複合床材である。 c is a composite floor, characterized in that is is adhered.

【0006】 [0006]

【作用】本発明の床板は、表面基板1として木質基板の表面に化粧シート1aが貼着されるとともに、裏打ちシート1cが貼着されることにより、表面基板1の表面側で化粧シート1aの含水率の変化による収縮膨張が発生するものの、裏面側において裏打ちシート1cが同様に収縮膨張することにより、表面基板1の表裏面における収縮膨張のバランスがとれ、表面基板1のみが床板基板3と無関係に反りが生ずるという問題は解決されるものである。 [Action] floorboards of the invention, together with the decorative sheet 1a is adhered to the surface of the wood substrate as a surface substrate 1, by backing sheet 1c is attached, the surface side of the surface substrate 1 of the decorative sheet 1a although contraction and expansion due to changes in moisture content occur, by backing sheet 1c is contraction and expansion in the same manner in the rear surface side, balanced shrinkage expansion in the front and back surfaces of the surface substrate 1, only the surface substrate 1 and the floor board 3 problem regardless warping occurs is intended to be solved.

【0007】 [0007]

【実施例】図1は本発明の複合床材の断面図の一例を示すものであり、必要に応じ側面に嵌合用の実が形成された床板基板3の表面に制振層2が貼着され、木質基板1 DETAILED DESCRIPTION FIG. 1 shows an example of a cross-sectional view of a composite floor of the present invention, the damping layer 2 is bonded to the side as needed on the surface of the floor board 3 fruit is formed for engagement It is, wood board 1
bの表面側に化粧シート1a、裏面側に裏打ちシート1 b of the surface side to the decorative sheet 1a, the backing sheet 1 on the back side
cが貼着された表面基板1が積層一体化された複合床材である。 c is a composite flooring surface substrate 1 is adhered are laminated and integrated.

【0008】本発明の表面基板1としては、木質基板1 [0008] As the surface substrate 1 of the present invention, wood board 1
bとして例えば合板、木質繊維板、木削片板、単板積層板等の木質板を使用することができる。 As the b example plywood, wood fiberboard, wood cutting Kataita may use wood plate such as laminated veneer board. また、木質基板1bの表面側に貼着する化粧シート1aとしては、天然木材を切削して得られる天然突板、人工突板およびそれら突板に不織布、紙、合成樹脂シートを裏打ちした突板シート等の化粧単板、あるいは化粧紙、樹脂含浸化粧紙、合成樹脂製化粧シート等を使用することができる。 As the decorative sheet 1a which is stuck on the surface side of the wood substrate 1b, natural obtained by cutting a natural wood veneer, nonwoven artificial veneer and their veneer, paper, cosmetic, such as sliced ​​veneer sheet of synthetic resin sheet backed veneer or decorative paper, a resin-impregnated decorative paper, a synthetic resin decorative sheet and the like can be used.

【0009】また、裏面に貼着する裏打ちシート1cとしては、化粧シート1aと同様のシートを使用することができ、表面基板1の表面側と裏面側のバランスを取るために化粧シート1aと同一のシートを裏打ちシート1 [0009] As the backing sheet 1c which is stuck on the back surface, it is possible to use the same sheet and decorative sheet 1a, identical to the decorative sheet 1a to balance the front and rear side of the surface substrate 1 sheet of sheet backing 1
cとして使用するのが好ましい。 Preferably used as c.

【0010】仮に異なるシートを使用する場合、そのシートのもつ物性(吸水性、吸湿性、吸水湿に伴う膨張・ [0010] If If you want to use a different seat, expansion and associated physical properties (water-absorbent with of that sheet, hygroscopic, water-absorbing humidity
収縮、乾燥に伴う収縮、引っ張り強度等)が同じかあるいは近似したシートを用いることが好ましい。 Shrinkage, caused by drying shrinkage, it is preferable that tensile strength, etc.) use the same or close to that sheet.

【0011】また、化粧シート1aとして一定の繊維方向を有する前記化粧単板を使用する場合、単板の繊維方向に対して平行方向と直交方向の含水率変化に伴う収縮膨張の量が大きく異なるという性質を有する。 Further, the case of using a decorative veneer, the amount of contraction and expansion due to moisture content change of the direction parallel to the direction perpendicular to the fiber direction of the veneer are significantly different with a constant fiber orientation as a cosmetic sheet 1a It has the property of.

【0012】このため、裏打ちシート1cも、表面側の化粧単板と、同一構成、同一の厚さの裏打ち単板を使用し、表面側の化粧単板の繊維方向と裏打ち単板の繊維方向が平行となるように貼着することにより、表面側の化粧単板1aと裏面側の裏打ち単板1cの含水率変化に伴う収縮膨張の量および方向が等しくなり、表面基板1の反りを防止することができる。 [0012] Thus, the backing sheet 1c also, a decorative veneer on the front side, the same configuration, using a backing veneer of the same thickness, the fiber direction of the surface side of the decorative veneer fiber direction and the backing veneer by adhering to become parallel, amount and direction of contraction and expansion due to moisture content change of the surface side decorative veneer 1a and the back side of the backing veneer 1c become equal, prevent warpage of the surface substrate 1 can do.

【0013】また木質基板1bに比べ化粧シート1aおよび裏打ちシート1cは薄いもの好ましくは1/4以下の厚さのものを使用する。 Further wood substrate 1b decorative sheet 1a and the backing sheet 1c compared with the thin preferably to use a quarter or less of the thickness. これ以上厚いものを使用すると、化粧シート1aおよび裏打ちシート1cの収縮膨張量が反りに与える影響が大きく、表裏面で若干でも収縮膨張の量が異なると表面基板1に反りが生じてしまうためである。 With more thicker, the decorative sheet 1a and contraction and expansion of the backing sheet 1c has a larger influence on the warping, in the amount of slightly even contraction and expansion in the front and back surfaces occurs warp different the surface substrate 1 is there.

【0014】また、表面基板1は床板基板3よりも薄いものを使用することが好ましい。 Further, the surface substrate 1, it is preferable to use thinner than floor board 3. これは、表面基板1を薄くすることにより表面基板1の剛性が低下し、床板表面に衝撃が得えられた際に、表面基板1が変形することにより衝撃を吸収することができ防音性能が向上するためである。 This reduces the rigidity of the surface substrate 1 by reducing the surface substrate 1, when an impact is E obtained floor surface, soundproof performance can be absorbed the impact by the surface substrate 1 is deformed in order to improve.

【0015】本発明の床板基板3としては、例えば合板、木質繊維板、木削片板、単板積層板等の木質板を使用することができる。 [0015] As the floor board 3 of the present invention, for example plywood, it is possible to use wood fiber board, wood cutting Kataita, a wood board such as a veneer laminate. また、床板基板3の側面には必要に応じ実加工を施すことができる。 Further, it is possible to perform the actual machining needed on the sides of the floor panel substrate 3.

【0016】この実加工の位置は、本発明の複合床材をコンクリート下地等に直貼りする場合は、床板基板3のみの側面あるいは床板基板3、制振層2および表面基板1にかけて実加工を施すことができる。 [0016] The position of the actual processing, when the composite floor of the present invention is attached directly to the concrete foundation or the like, the side surface or floor board 3 only floor substrate 3, the actual machining toward damping layer 2 and the surface substrate 1 it can be applied.

【0017】一方、木造住宅において床板側面部に形成された雄実部表面部あるいは雌実下側凸部表面部に釘を打ち根太に固定する場合は、床板基板3のみに実加工を施すことにより、釘打ちによって床板基板3が根太に固定された後も、制振層2を含む表面側の部分が床板基板3とは独立して振動することができ、床板表面に与えられた衝撃を表面基板1および制振層2により吸収することができ優れた防音性能を有することとなる。 Meanwhile, the case of fixing the joist hit the nail on Omi portion surface portion or the female real lower projection surface portion formed on the floor plate side portions in wooden houses, is subjected to actual machining only floor board 3 Accordingly, even after the floor board 3 is fixed to the joist by nailing, part of the surface side including the damping layer 2 is able to vibrate independently of the floor board 3, a shock given to the floor surface be absorbed by the surface substrate 1 and the damping layer 2 will have a can be excellent soundproof performance.

【0018】また、コンクリート下地に直貼りする場合、床板基板3の裏面に裏溝を形成することにより床板基板3の剛性を低下させ、床材表面に加えられた衝撃を床板基板3の変形によっても吸収することができ、防音性能を向上させることができる。 [0018] In the case of paste directly to the concrete base, it reduces the rigidity of the floor panel substrate 3 by forming a Uramizo on the back surface of the floor panel substrate 3, by the shock applied to the flooring surface deformation of the floor panel substrate 3 can also be absorbed, it improves the sound insulation performance. 更に裏溝を形成することにより床板基板3の可塑性を高め、施工下地面の不陸に沿って床板を施工しやすくなる。 Further enhance the plasticity of the floor panel substrate 3 by forming a Uramizo, easily applying a floorboard along the uneven surface of the construction underlying surface.

【0019】本発明の制振層2は、合成樹脂シートおよびゴムシートあるいはこれらの発泡体、または不織布等の伸縮性を有する衝撃シートを使用することができる。 The damping layer 2 of the present invention, the synthetic resin sheet and a rubber sheet or these foams, or the impact sheet having elasticity such nonwoven fabric can be used.
このような衝撃シートからなる制振層2を設けることにより、床板表面に与えられた衝撃エネルギーを制振層の収縮変形により吸収し、下層に伝わるのを防止することができる。 By providing the vibration-damping layer 2 made of such a shock sheet, the impact energy imparted to the floor surface is absorbed by the contraction deformation of the damping layer can be prevented from being transmitted to the lower layer.

【0020】また、図2に示すように、前記衝撃シート2aと、塩化ビニル等の合成樹脂またはゴムを主体として鉛、酸化鉄等の金属粉や炭酸カルシウム、タルク等の無機物質粉などの高密度物質粉を混入して遮音性を高めた遮音シート2bとを積層したものを制振層2として使用することができる。 Further, as shown in FIG. 2, and the impact sheet 2a, lead the synthetic resin or rubber such as vinyl chloride as a main component, metal powder, calcium carbonate, etc. iron oxide, high such as inorganic materials powder talc it can be used a laminate of a sound insulating sheet 2b with increased contaminating sound insulation density material powder as the damping layer 2.

【0021】このような、衝撃シート2aと遮音シート2bとを組み合わせることにより、制振層2の緩衝シート2aの収縮変形により吸収し、次いで遮音シート2b [0021] Such, by combining the impact sheet 2a and sound insulation sheet 2b, absorbed by the contraction deformation of the buffer sheet 2a of the damping layer 2, then the sound insulation sheet 2b
による遮蔽機能により下層への伝達を防止することができるものである。 It is capable of preventing the transmission to lower the blocking function by.

【0022】また、この制振層2として緩衝シートを使用する場合、緩衝シートは床板基板3および表面基板1 Further, when using a buffer sheet as the damping layer 2, the buffer seat floor board 3 and the surface substrate 1
よりも薄いものを使用するのが好ましい。 Preferable to use those thinner than.

【0023】これは、特に床板基板3のみで実を形成するとき、隣接する床材との接合は実により行なわれ、実より表面側の部分は隣接する床材間においてはお互いに拘束することなく、自由に動く状態となっている。 [0023] This is particularly when forming a solid only at floor board 3, bonding of the adjacent flooring is performed by the real, they are bound to each other part of the real from the surface side between adjacent flooring rather, it has become a state to move freely. このような状態において、収縮変形により衝撃を吸収する緩衝シートの厚さがあまり厚いと、重量物を載置した場合に緩衝シートの収縮変形により隣接する床材間での段差が生じやすく、キャスター等が引っ掛かりやすい問題を有するためである。 In this state, when the thickness of the buffer sheet to absorb the impact by the contraction deformation is too thick, a step is likely to occur between the flooring adjacent the contraction deformation of the cushioning sheet when placing the heavy, caster etc. This is because with the caught easy problem.

【0024】さらに、図3に示すように本発明の複合床材の裏面に合成樹脂シート、ゴムシートあるいはこれらの発泡体、または不織布等の緩衝材4を貼着することにより制振層2における衝撃の吸収に加え、最下層においても同様の収縮変形による衝撃の吸収がなされ、防音性能の向上を図ることができる。 Furthermore, the damping layer 2 by adhering the rear surface to the synthetic resin sheet of composite floor, rubber sheet or these foams, or the buffer material 4 such as a nonwoven fabric of the present invention as shown in FIG. 3 in addition to the absorption of the impact absorption of impact by a similar shrinkage deformation in the lowermost layer is made, it is possible to improve the sound insulation performance. さらに、施工下地面に不陸があっても、この不陸に沿って緩衝材4が変形するため不陸を吸収した平坦な床面を得ることができる。 Furthermore, even if there is uneven surface the construction under the ground, it is possible to buffer material 4 along the uneven surface to obtain a flat floor surface which has absorbed uneven surface to deform.

【0025】 [0025]

【発明の効果】本発明の複合床材は、床板基板3を構成する木質基板1bの表面側に化粧シート1aを貼着されるとともに、裏面側に裏打ちシート1cが貼着されることにより、表面基板1の表面側で化粧シート1aの含水率の変化による収縮膨張が発生するものの、裏面側において裏打ちシート1cが同様に収縮膨張することにより、表面基板1の表裏面における収縮膨張のバランスがとれる。 Composite floor of the present invention exhibits, while being stuck to the decorative sheet 1a on the surface of the wood substrate 1b which constitute the floor board 3, by backing sheet 1c on the back side is bonded, although on the surface side of the surface substrate 1 contraction and expansion due to changes in the moisture content of the decorative sheet 1a occurs, by backing sheet 1c is contraction and expansion in the same manner in the rear surface side, the balance of contraction and expansion in the front and back surfaces of the surface substrate 1 take.

【0026】さらに、木質基板1bの含水率変化により収縮膨張しても、化粧シート1aと裏打ちシート1cが表裏面から均等にこの収縮膨張を拘束することにより表面基板1のみが床板基板3と無関係に反りが生ずるという問題は解決されるものである。 Furthermore, even if the contraction and expansion by the water content changes in wood substrate 1b, independent of the floor board 3 is only the surface substrate 1 by the decorative sheet 1a and the backing sheet 1c restrains equally the contraction and expansion of the front and back surfaces problem warpage occurs is intended to be solved.

【図面の簡単な説明】 BRIEF DESCRIPTION OF THE DRAWINGS

【図1】 本発明複合床板の断面図、 [1] The present invention cross-sectional view of a composite floor,

【図2】 制振材として緩衝シート2aと遮音シート2 [2] buffer sheet 2a as damping material and sound-insulating sheet 2
bとを組合わせた場合を示す。 Shows the case where a combination of and b.

【図3】 裏面に緩衝材4を貼着した場合の断面図、 3 is a cross-sectional view of case of adhering the cushioning material 4 on the rear surface,

【符号の説明】 DESCRIPTION OF SYMBOLS

1:表面基板、1a:化粧シート、1b:木質基板、1 1: the surface substrate, 1a: decorative sheet, 1b: wood substrate, 1
c:裏打ちシート、2:制振層、2a:緩衝シート、2 c: the backing sheet, 2: damping layer, 2a: buffer sheet, 2
b:遮音シート、3:床板基板、4:緩衝材。 b: sound insulating sheet, 3: floor board, 4: buffer material.

Claims (4)

    【特許請求の範囲】 [The claims]
  1. 【請求項1】 床板基板の表面に、制振層を介在させて表面基板が積層一体化されてなる複合床材において、表面基板が木質基板の表面側に化粧シートが貼着されるとともに、裏面側に裏打ちシートが貼着されてなることを特徴とする複合床材。 To 1. A surface of the floor plate substrate, the composite floor surface substrate with intervening damping layer are integrally laminated, together with the surface substrate decorative sheet is affixed to the front surface side of the wood substrate, composite floor, characterized in that backing sheet on the back side is being attached.
  2. 【請求項2】 表面基板が木質基板の表面側に化粧シートとして化粧単板が貼着されるとともに、裏面側に裏打ちシートとして、該化粧単板と繊維方向が平行となるように裏打ち単板が貼着されたことを特徴とする請求項1 With wherein the surface substrate is decorative veneer is adhered as the decorative sheet on the surface side of the wood substrate, the backing sheet on the back side, backing veneer as the decorative veneer and the fiber direction is parallel claim 1, characterized in that but is adhered
    記載の複合床材。 Composite floor described.
  3. 【請求項3】 制振層が緩衝機能をする緩衝シートであることを特徴とする請求項1および2記載の複合床材。 3. A process according to claim 1 and 2 composite floor of, wherein the damping layer is a buffer sheet for a buffering function.
  4. 【請求項4】 制振層が緩衝機能を有する緩衝シートと高密度物質粉が添加された遮音シートからなる請求項1 4. The method of claim 1, the damping layer is made of a sound insulating sheet buffer sheet and a high-density material powder is added with a buffering function
    および2記載の複合床材。 And 2 composite floor according.
JP18506494A 1994-07-05 1994-07-05 Composite floor material Pending JPH0821071A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP18506494A JPH0821071A (en) 1994-07-05 1994-07-05 Composite floor material

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP18506494A JPH0821071A (en) 1994-07-05 1994-07-05 Composite floor material

Publications (1)

Publication Number Publication Date
JPH0821071A true true JPH0821071A (en) 1996-01-23

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ID=16164180

Family Applications (1)

Application Number Title Priority Date Filing Date
JP18506494A Pending JPH0821071A (en) 1994-07-05 1994-07-05 Composite floor material

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Country Link
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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009052201A (en) * 2007-08-23 2009-03-12 Panasonic Electric Works Co Ltd Wooden floor material
US20130145707A1 (en) * 2002-04-08 2013-06-13 Valinge Innovation Ab Floorboards for flooring
US8875464B2 (en) 2012-04-26 2014-11-04 Valinge Innovation Ab Building panels of solid wood
US8935899B2 (en) 2012-02-02 2015-01-20 Valinge Innovation Ab Lamella core and a method for producing it
US9140010B2 (en) 2012-07-02 2015-09-22 Valinge Flooring Technology Ab Panel forming
JP2015203203A (en) * 2014-04-11 2015-11-16 株式会社ノダ Floor material
US9975267B2 (en) 2013-08-27 2018-05-22 Valinge Innovation Ab Method for producing a lamella core

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20130145707A1 (en) * 2002-04-08 2013-06-13 Valinge Innovation Ab Floorboards for flooring
US8720151B2 (en) * 2002-04-08 2014-05-13 Valinge Innovation Ab Floorboards for flooring
US9194135B2 (en) 2002-04-08 2015-11-24 Valinge Innovation Ab Floorboards for floorings
JP2009052201A (en) * 2007-08-23 2009-03-12 Panasonic Electric Works Co Ltd Wooden floor material
US8935899B2 (en) 2012-02-02 2015-01-20 Valinge Innovation Ab Lamella core and a method for producing it
US9758966B2 (en) 2012-02-02 2017-09-12 Valinge Innovation Ab Lamella core and a method for producing it
US8875464B2 (en) 2012-04-26 2014-11-04 Valinge Innovation Ab Building panels of solid wood
US9140010B2 (en) 2012-07-02 2015-09-22 Valinge Flooring Technology Ab Panel forming
US9482015B2 (en) 2012-07-02 2016-11-01 Ceraloc Innovation Ab Panel forming
US9556623B2 (en) 2012-07-02 2017-01-31 Ceraloc Innovation Ab Panel forming
US9663956B2 (en) 2012-07-02 2017-05-30 Ceraloc Innovation Ab Panel forming
US9975267B2 (en) 2013-08-27 2018-05-22 Valinge Innovation Ab Method for producing a lamella core
JP2015203203A (en) * 2014-04-11 2015-11-16 株式会社ノダ Floor material

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