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JP2018003358A - Woody composite base material and floor material - Google Patents

Woody composite base material and floor material Download PDF

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JP2018003358A
JP2018003358A JP2016128931A JP2016128931A JP2018003358A JP 2018003358 A JP2018003358 A JP 2018003358A JP 2016128931 A JP2016128931 A JP 2016128931A JP 2016128931 A JP2016128931 A JP 2016128931A JP 2018003358 A JP2018003358 A JP 2018003358A
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layer
base material
wood
plywood
composite base
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JP6841606B2 (en
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彰一 占部
Shoichi Urabe
彰一 占部
勇司 青木
Yuji Aoki
勇司 青木
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Asahi Woodtec Corp
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Abstract

【課題】表面の凹凸性状に優れ、反りが少ない、木質複合基材を提供する。【解決手段】本実施形態に係る木質複合基材10は、5プライの針葉樹合板層2と、針葉樹合板層2に接着された木質繊維板層1と、を備え、前記針葉樹合板層の第一層、第三層および第五層の合計厚さをLL、第二層および第四層の合計厚さをLCとするとき、LC/(LL+LC)が、0.50〜0.70である。【選択図】 図1PROBLEM TO BE SOLVED: To provide a wood composite base material having excellent surface unevenness and less warpage. A wood composite base material 10 according to the present embodiment includes a 5-ply softwood plywood layer 2 and a wood fiberboard layer 1 adhered to the softwood plywood layer 2, and is the first of the softwood plywood layers. When the total thickness of the layer, the third layer and the fifth layer is LL, and the total thickness of the second layer and the fourth layer is LC, LC / (LL + LC) is 0.50 to 0.70. [Selection diagram] Fig. 1

Description

本発明は、木質複合基材および床材に関する。   The present invention relates to a wood composite base material and a flooring material.

戸建住宅、マンションその他の建築物に用いられるフローリングには、無垢の木材からなる無垢床材のほか、合板、MDF、パーティクルボードなどの木質ボードを積層してなる基材(以下、「木質基材」と呼ぶ。)の表面に、銘木単板、挽き板などの化粧材を貼り付けた化粧貼床材が用いられる。また、壁材、天井材、階段材などの内装材においても、基材の表面に化粧材を貼り付けたものが用いられる。   The flooring used in detached houses, condominiums and other buildings includes solid flooring made of solid wood, as well as base materials made of laminated wooden boards such as plywood, MDF, and particle board (hereinafter referred to as “woody base”). A decorative flooring material is used in which a decorative material such as a single wood veneer or a sawing board is pasted on the surface of the material. Also, interior materials such as wall materials, ceiling materials, and staircase materials are used in which a decorative material is attached to the surface of the base material.

化粧貼内装材は、無垢材よりも水分に起因する膨張・収縮が少ない基材を用いており、表面には各種の塗装が施され内部への水分の侵入を防止しているため、施工後の使用環境において反りが少なく扱いが容易であるなどの理由から、多くの建築現場で用いられるようになってきている。   The decorative interior material uses a base material that has less expansion and contraction due to moisture than solid wood, and various coatings are applied on the surface to prevent moisture from entering the interior. It has been used in many construction sites because it has less warpage and is easy to handle.

一方、木質基材としては、ラワンなどを用いた広葉樹合板が主流であったが、国産材の利用促進のために、スギ、ヒノキ、カラマツ、トドマツなどの針葉樹合板を用いる取り組みが進んでいる。針葉樹合板は、低コストであり、軽量で、各種機械的性能に優れているため、主として構造用基材としての利用は進んでいる。しかし、針葉樹合板は、早材と晩材との間における比重差が大きく、基材表面に凹凸が生じやすい。このことが針葉樹合板を内装材用基材に用いる障害となっている。   On the other hand, hardwood plywood using lauan or the like was the mainstream as a woody base material, but efforts to use coniferous plywood such as cedar, cypress, larch, and todomatsu are progressing to promote the use of domestic timber. Since softwood plywood is low-cost, lightweight, and excellent in various mechanical performances, its use as a structural base material is progressing mainly. However, softwood plywood has a large specific gravity difference between the early and late materials, and unevenness is likely to occur on the substrate surface. This is an obstacle to using softwood plywood as a base material for interior materials.

特開2013−127188号公報(特許文献1)には、乾燥条件および高湿条件の繰り返しにより床材表面にスギ合板の凹凸が現れないように、スギ合板の表面に4.0〜6.0mmの広葉樹木質繊維板(MDF)を貼り付けた複合合板の発明が開示されている。特開2014−73587号公報(特許文献2)および特開2014−226794号公報(特許文献3)には、針葉樹合板の表面に湿式硬質繊維板(ハードボード)を接着した複合合板に関する発明が開示されている。これらの発明は、ハードボードが硬質面と軟質面(エンボス加工面)を備えており、その軟質面で凹凸を吸収するものである。   In JP2013-127188A (Patent Document 1), the surface of the cedar plywood is 4.0 to 6.0 mm so that the unevenness of the cedar plywood does not appear on the floor material surface due to the repetition of the drying condition and the high humidity condition. An invention of a composite plywood having a hardwood wood fiberboard (MDF) attached thereto is disclosed. Japanese Patent Application Laid-Open No. 2014-73587 (Patent Document 2) and Japanese Patent Application Laid-Open No. 2014-226794 (Patent Document 3) disclose an invention related to a composite plywood in which a wet hard fiberboard (hardboard) is bonded to the surface of a softwood plywood. Has been. In these inventions, a hard board has a hard surface and a soft surface (embossed surface), and the soft surface absorbs irregularities.

特開2013−127188号公報JP 2013-127188 A 特開2014−73587号公報JP 2014-73587 A 特開2014−226794号公報JP 2014-226794 A

特許文献1〜3の発明により、針葉樹合板を床材に用いるときの表面凹凸に関する不具合を防止することが可能となる。しかしながら、針葉樹合板にMDF、ハードボードなどの木質繊維板を積層した場合には、広葉樹合板の複合基材に比べて反りが生じやすい。この問題は、特に、80℃程度の温水による過酷な乾燥環境が想定される床暖房床材において顕著となる。特許文献1〜3には、針葉樹合板に木質繊維板を積層した木質複合基材の乾燥環境下での反りについて全く考慮されていない。   According to the inventions of Patent Documents 1 to 3, it is possible to prevent problems related to surface irregularities when using softwood plywood for flooring. However, when wood fiber boards, such as MDF and a hard board, are laminated | stacked on a softwood plywood, it is easy to produce curvature compared with the composite base material of a hardwood plywood. This problem is particularly prominent in floor heating floor materials in which a severe dry environment with hot water of about 80 ° C. is assumed. Patent Documents 1 to 3 do not consider any warpage in a dry environment of a wood composite base material in which a wood fiber board is laminated on a softwood plywood.

本発明は、従来技術の問題点を解決するためになされたものであり、表面の凹凸性状に優れ、反りが少ない、針葉樹合板の表面に木質繊維板を接着した木質複合基材、さらには、このような木質複合基材を用いた床材を提供することを目的としている。   The present invention has been made in order to solve the problems of the prior art, is excellent in surface irregularity, less warped, a wood composite base material in which a wood fiberboard is bonded to the surface of a softwood plywood, The object is to provide a flooring using such a wood composite substrate.

本発明は、下記の発明を要旨とする。   The gist of the present invention is as follows.

〔A〕5プライの針葉樹合板層と、
前記針葉樹合板層に接着された木質繊維板層と、を備える木質複合基材であって、
前記針葉樹合板層の第一層、第三層および第五層の合計厚さをLL、第二層および第四層の合計厚さをLCとするとき、LC/(LL+LC)が0.50〜0.70である、
木質複合基材。
[A] a 5-ply softwood plywood layer;
A wood composite substrate comprising a wood fiberboard layer bonded to the conifer plywood layer,
When the total thickness of the first, third and fifth layers of the softwood plywood layer is L L and the total thickness of the second and fourth layers is L C , L C / (L L + L C ) Is 0.50 to 0.70,
A wood composite substrate.

〔B〕前記第一層および前記第五層を同じ針葉樹(以下、「樹種1」という)の単板で構成し、前記第二層および前記第四層を同じ針葉樹(以下、「樹種2」という)の単板で構成し、前記樹種1の気乾比重が、前記樹種2の気乾比重よりも高い、
上記〔A〕の木質複合基材。
[B] The first layer and the fifth layer are made of a single plate of the same conifer (hereinafter referred to as “tree species 1”), and the second layer and the fourth layer are the same conifer (hereinafter “tree species 2”). The air dry specific gravity of the tree species 1 is higher than the air dry specific gravity of the tree species 2,
[A] wood composite base material.

〔C〕木質繊維板層が、ハードボードで構成される、
上記〔A〕または〔B〕の木質複合基材。
[C] The wood fiberboard layer is composed of a hard board,
[A] or [B] wood composite base material.

〔D〕前記針葉樹合板層の厚さが、8.0〜12.0mmである、
上記〔A〕〜〔C〕のいずれかの木質複合基材。
[D] The thickness of the softwood plywood layer is 8.0 to 12.0 mm.
The woody composite substrate according to any one of the above [A] to [C].

〔E〕前記木質繊維板層の厚さが、1.0〜3.0mmである、
上記〔A〕〜〔D〕のいずれかの木質複合基材。
[E] The thickness of the wood fiber board layer is 1.0 to 3.0 mm,
The woody composite base material according to any one of the above [A] to [D].

〔F〕上記〔A〕〜〔E〕のいずれかの木質複合基材の表面に化粧材を貼り付けた、
床材。
[F] A cosmetic material was pasted on the surface of the wood composite base material of any one of the above [A] to [E].
Flooring.

本発明によれば、表面の凹凸性状に優れ、反りが少ない、針葉樹合板の表面に木質繊維板を接着した木質複合基材、さらには、このような木質複合基材を用いた床材を提供することができる。   According to the present invention, there is provided a wood composite base material in which a wood fiber board is bonded to the surface of a softwood plywood, which has excellent surface irregularity properties and little warpage, and further, a flooring using such a wood composite base material is provided. can do.

本実施形態に係る木質複合基材を例示した図The figure which illustrated the woody composite substrate concerning this embodiment 本発明に係る床材を例示した図The figure which illustrated the flooring which concerns on this invention

以下、図を用いて本発明の実施態様を説明する。   Hereinafter, embodiments of the present invention will be described with reference to the drawings.

1.木質複合基材
図1に示すように、本実施形態に係る木質複合基材10は、5プライの針葉樹合板層2と、針葉樹合板層2に接着された木質繊維板層1と、を備える。木質複合基材の寸法としては、例えば、1尺×6尺(約303mm×約1818mm)サイズ、3尺×6尺(約909mm×約1818mm)サイズなどである。
1. Wood composite base material As shown in FIG. 1, a wood composite base material 10 according to this embodiment includes a 5-ply softwood plywood layer 2 and a wood fiberboard layer 1 bonded to the softwood plywood layer 2. The size of the wood composite base material is, for example, a size of 1 × 6 (about 303 mm × about 1818 mm), a size of 3 × 6 (about 909 mm × about 1818 mm), and the like.

(a)木質繊維板層1
木質繊維板について、JIS A5905:2003には、密度が0.35g/cm未満のインシュレーションファイバーボード(以下、「インシュレーションボード」という)、密度が0.35g/cm以上のミディアムデンシティファイバーボード(以下、「MDF」という)、および、密度が0.80g/cm以上のハードファイバーボード(以下、「ハードボード」という)が規定されている。本発明の木質繊維板としては、このいずれを用いてもよいが、特にハードボードを用いるのが好ましい。ハードボードは、MDFよりも高密度であり、高硬度である一方、裏面側に軟質層(金網の網目模様の形状(エンボス)を備える層)を有しており、この軟質層によって針葉樹合板表面の凹凸を吸収することができる。
(A) Wood fiberboard layer 1
Regarding wood fiber board, JIS A5905: 2003 describes an insulation fiber board having a density of less than 0.35 g / cm 3 (hereinafter referred to as “insulation board”) and a medium density fiber having a density of 0.35 g / cm 3 or more. A board (hereinafter referred to as “MDF”) and a hard fiber board (hereinafter referred to as “hard board”) having a density of 0.80 g / cm 3 or more are defined. Any of these may be used as the wood fiber board of the present invention, but a hard board is particularly preferable. Hardboard has a higher density and higher hardness than MDF, while it has a soft layer (a layer with a wire mesh shape (emboss)) on the back side. By this soft layer, the surface of softwood plywood Can absorb the unevenness.

木質繊維板層1の厚さは、1.0〜3.0mmであることが好ましい。1.0mm未満では凹凸の吸収性能が不十分であるおそれがあり、3.0mmを超えると、繊維板(合板より寸法変化率が大きい)の比率が高くなるため、寸法変化が大きくなり、隙や突き上げが発生するおそれがある。木質繊維板の厚さは、1.2mm以上がより好ましく、1.5mm以上がさらに好ましく、1.8mm以上が尚一層好ましい。また、2.5mm以下がより好ましく、2.2mm以下がさらに好ましい。MDFを用いる場合には厚さ方向に分割されているものでもよい。この場合、切断面側を針葉樹合板層に接着する。   The thickness of the wood fiberboard layer 1 is preferably 1.0 to 3.0 mm. If the thickness is less than 1.0 mm, the irregularity absorption performance may be insufficient. If the thickness exceeds 3.0 mm, the ratio of the fiberboard (the dimensional change rate is larger than that of the plywood) increases, so that the dimensional change increases and the gap is increased. Or push-up may occur. The thickness of the wood fiber board is more preferably 1.2 mm or more, further preferably 1.5 mm or more, and still more preferably 1.8 mm or more. Moreover, 2.5 mm or less is more preferable, and 2.2 mm or less is further more preferable. When MDF is used, it may be divided in the thickness direction. In this case, the cut surface side is bonded to the softwood plywood layer.

(b)針葉樹合板層2
針葉樹合板層2は、第一層21、第二層22、第三層23、第四層24および第五層25の5プライの単板層を有する。ここで、第一層21、第三層23および第五層25は、繊維の向きが長手方向に平行な単板層(以下、「ロング層」ともいう)であり、第二層22および第四層24は、繊維の向きが長手方向に直交する単板層(以下、「クロス層」ともいう)である。針葉樹合板層2の巾方向の曲げヤング率は、3.0GPa以上であることが好ましい。
(B) Softwood plywood layer 2
The softwood plywood layer 2 has a five-ply single plate layer of a first layer 21, a second layer 22, a third layer 23, a fourth layer 24 and a fifth layer 25. Here, the first layer 21, the third layer 23, and the fifth layer 25 are single-plate layers (hereinafter, also referred to as “long layers”) in which the direction of the fibers is parallel to the longitudinal direction, The four layers 24 are single plate layers (hereinafter also referred to as “cross layers”) in which the fiber orientation is orthogonal to the longitudinal direction. The bending Young's modulus in the width direction of the softwood plywood layer 2 is preferably 3.0 GPa or more.

針葉樹合板層2の厚さには特に制約がなく、床材、壁材、天井材、階段材等の用途に応じて適切な厚さを選択すればよい。床材用基材として用いる場合には、8.0〜12.0mmの範囲が適切である。8.0mm未満では木質複合基材に占める針葉樹合板の比率が低く、繊維板の比率が高くなるため、寸法変化が大きくなり、隙や突き上げが発生するおそれがある。また、12.0mmを超えると、重量が増加し、運搬時や施工時における作業性が悪くなるおそれがある。なお、針葉樹合板層2の厚さは、9.0mm以上が好ましい。   There is no restriction | limiting in particular in the thickness of the softwood plywood layer 2, What is necessary is just to select suitable thickness according to uses, such as a flooring, a wall material, a ceiling material, and a staircase material. When used as a base material for flooring, a range of 8.0 to 12.0 mm is appropriate. If it is less than 8.0 mm, the ratio of softwood plywood to the wood composite base material is low and the ratio of fiberboard is high, so that the dimensional change becomes large, and there is a possibility that gaps or push-ups occur. Moreover, when it exceeds 12.0 mm, a weight will increase and there exists a possibility that the workability | operativity at the time of conveyance and construction may worsen. In addition, as for the thickness of the softwood plywood layer 2, 9.0 mm or more is preferable.

針葉樹合板層2の樹種としては、カラマツ、トドマツ、ヒノキ、スギ、エゾマツ、アカマツ、ベイマツ、ベイツガ、スプルース、ラジアタパインなどが挙げられ、これらの一種または二種以上を選択して用いることができる。特に、第一層21および第五層25(裏板)には、第二層22および第四層24(添え心板)よりも比較的比重が高い樹種を選ぶのがよい。比重が高い樹種ほど、強度が高く、かつ表面性状が優れる傾向があり、比重が低い樹種ほど、強度が低く、かつ節等の欠陥が多い傾向があるからである。   Examples of the tree species of the conifer plywood layer 2 include larch, todomatsu, hinoki, cedar, spruce, red pine, red pine, beech pine, spruce, and radiatapine, and one or more of these can be selected and used. In particular, for the first layer 21 and the fifth layer 25 (back plate), it is preferable to select a tree species having a relatively higher specific gravity than that of the second layer 22 and the fourth layer 24 (core plate). This is because a tree species with a higher specific gravity tends to have higher strength and surface properties, and a tree species with a lower specific gravity tends to have lower strength and more defects such as nodes.

針葉樹合板層2において、前記針葉樹合板層の第一層、第三層および第五層の合計厚さをLL、第二層および第四層の合計厚さをLCとするとき、LC/(LL+LC)は、0.50〜0.70である。LC/(LL+LC)が0.50未満では、各単板層の種類や厚さを種々変更したとしても、巾反りを基準値内に制限することが難しい。一方、LC/(LL+LC)が0.70を超えると、長さ反りを基準値内に制限することが難しい。 In the softwood plywood layer 2, when the total thickness of the first layer, the third layer, and the fifth layer of the softwood plywood layer is L L , and the total thickness of the second layer and the fourth layer is L C , L C / (L L + L C ) is 0.50 to 0.70. When L C / (L L + L C ) is less than 0.50, it is difficult to limit the warpage to the reference value even if the type and thickness of each single plate layer are variously changed. On the other hand, if L C / (L L + L C ) exceeds 0.70, it is difficult to limit the length warpage within the reference value.

上述のように、第一層21および第五層25を構成する単板の樹種と、第二層22および第四層24を構成する単板の樹種が同じである場合には、LC/(LL+LC)を0.50未満としても、巾反りを基準値内に制限できることがある。しかし、第一層21および第五層25を同じ針葉樹(樹種1)で構成し、第二層22および第四層24を同じ針葉樹(樹種2)で構成し、樹種1(例えば、カラマツまたはトドマツ)の気乾比重が、樹種2(例えば、ヒノキまたはスギ)の気乾比重よりも高い場合には巾反りが生じやすい。しかし、LC/(LL+LC)を0.50以上とすれば、巾反りを防止できる。 As described above, when the tree species of the single plate constituting the first layer 21 and the fifth layer 25 and the tree species of the single plate constituting the second layer 22 and the fourth layer 24 are the same, L C / Even if (L L + L C ) is less than 0.50, the width warpage may be limited within the reference value. However, the first layer 21 and the fifth layer 25 are composed of the same conifer (tree species 1), the second layer 22 and the fourth layer 24 are composed of the same conifer (tree species 2), and the tree species 1 (for example, larch or todomatsu) ) Is higher than the air-dry specific gravity of the tree species 2 (for example, cypress or cedar), the width warp is likely to occur. However, if L C / (L L + L C ) is 0.50 or more, the warp can be prevented.

なお、LC/(LL+LC)は、巾反りを小さくする観点からは、0.52以上が好ましく、0.54以上がより好ましく、0.55以上が更に好ましい。また、LC/(LL+LC)は、長さ反りを小さくする観点からは、0.65以下が好ましく、0.62以下がより好ましく、0.60以下が更に好ましい。 Note that L C / (L L + L C ) is preferably 0.52 or more, more preferably 0.54 or more, and still more preferably 0.55 or more, from the viewpoint of reducing the width warpage. In addition, L C / (L L + L C ) is preferably 0.65 or less, more preferably 0.62 or less, and still more preferably 0.60 or less from the viewpoint of reducing the length warpage.

第一層21〜第五層25の厚さは、それぞれ1.0mm以上であることが好ましく、1.2mm以上がより好ましく、1.4mm以上がさらに好ましい。特に、1.6mm以上が好ましく、1.7mm以上がいっそう好ましい。中でも、本発明において第二層22および第四層24の厚さが特に重要であり、それぞれ2.0mm以上であることが好ましく、2.2mm以上がより好ましく、2.4mm以上がさらに好ましい。特に、2.6mm以上が好ましい。また、第二層22および第四層24は、同一の樹種で、かつ同一の厚みであることが好ましい。   The thicknesses of the first layer 21 to the fifth layer 25 are each preferably 1.0 mm or more, more preferably 1.2 mm or more, and further preferably 1.4 mm or more. In particular, it is preferably 1.6 mm or more, and more preferably 1.7 mm or more. Among them, the thicknesses of the second layer 22 and the fourth layer 24 are particularly important in the present invention, each of which is preferably 2.0 mm or more, more preferably 2.2 mm or more, and further preferably 2.4 mm or more. In particular, 2.6 mm or more is preferable. The second layer 22 and the fourth layer 24 are preferably the same tree species and the same thickness.

(c)木質複合基材の製造方法
木質複合基材は、従来公知の製造方法を組み合わせることにより製造することが可能である。まず、所定の樹種、寸法の針葉樹の単板を用意し、接着剤を介在させた状態で各単板を積層し、所定の圧力、温度、時間のプレス加工を行い、さらに表裏面を研削して、針葉樹合板を製造することができる。続いて、この針葉樹合板に接着剤を介在させた状態で、通常の方法で製造された木質繊維板を積層し、所定の圧力、温度、時間のプレス加工を行い、木質複合基材を製造することができる。なお、針葉樹合板の第一層および第五層のみが研削されるため、予め用意する単板層の厚さは、研削量との関係で決めればよい。
(C) Manufacturing method of wood composite base material A wood composite base material can be manufactured by combining a conventionally well-known manufacturing method. First, prepare a single veneer of a coniferous tree of a predetermined tree type and size, laminate each veneer with an adhesive interposed, perform pressing at a predetermined pressure, temperature and time, and then grind the front and back surfaces Thus, a softwood plywood can be manufactured. Subsequently, a wood fiber board manufactured by a normal method is laminated in a state where an adhesive is interposed in the conifer plywood, and a predetermined pressure, temperature, and time are pressed to manufacture a wood composite base material. be able to. Since only the first layer and the fifth layer of the softwood plywood are ground, the thickness of the single plate layer prepared in advance may be determined in relation to the grinding amount.

2.化粧貼内装材
本実施形態に係る木質複合基材は、例えば、床材、壁材、天井材、階段材などの内装材の基材として用いることができるが、特に、床材、中でも、床暖房用床材の基材として用いるのが好ましい。床暖房用床材は、苛酷な乾燥環境において使用されるため、特に、乾燥条件における反りが小さいことが特に求められる。本実施形態に係る木質複合基材は、そのような乾燥環境においても反りが発生しにくい基材であるため、床暖房用床材の基材に用いるのに適している。
2. The decorative composite interior material The wood composite base material according to the present embodiment can be used as a base material for interior materials such as floor materials, wall materials, ceiling materials, and staircase materials. It is preferably used as a base material for flooring for heating. Since the flooring for floor heating is used in a harsh dry environment, it is particularly required that the warp in the dry condition is small. The wood composite base material according to the present embodiment is a base material that hardly warps even in such a dry environment, and is therefore suitable for use as a base material of a flooring material for floor heating.

図2に示すように、本実施形態に係る床材100は、5プライの針葉樹合板層2と、針葉樹合板層2に接着された木質繊維板層1とを備える木質複合基材10の木質繊維板層1側に化粧材3を貼り付けて構成されたものである。本実施形態に係る床材100の裏面には、必要に応じて、裏面材4を貼り付けてもよい。   As shown in FIG. 2, a flooring 100 according to the present embodiment includes a wood composite base material 10 wood fiber including a 5-ply softwood plywood layer 2 and a wood fiberboard layer 1 bonded to the softwood plywood layer 2. The decorative material 3 is affixed to the plate layer 1 side. The back material 4 may be attached to the back surface of the floor material 100 according to the present embodiment, if necessary.

(a)化粧材3
化粧材3としては、例えば、突板、挽板等の木材を加工したもの、樹脂フィルム、紙などのシートに色柄を印刷した化粧シートなど、内装材の表面に貼り付けられる化粧材を用いることができる。化粧材3としては、厚さが0.05〜3.0mmが一般に用いられるが、そのような厚さのものに限定されない。特に、熱圧による貼り付けを容易に行うことができる、1.0mm以下のものを用いるのが好ましい。
(A) Cosmetic material 3
As the decorative material 3, for example, a decorative material attached to the surface of the interior material such as a processed sheet made of wood such as a veneer or a grinder, a decorative sheet printed with a color pattern on a sheet of resin film, paper, or the like is used. Can do. As the decorative material 3, a thickness of 0.05 to 3.0 mm is generally used, but is not limited to such a thickness. In particular, it is preferable to use one having a thickness of 1.0 mm or less, which can be easily attached by hot pressure.

(b)裏面材4
裏面材4は、製造工程中または使用時の反りを低減するためのものであり、例えば、突板、紙、樹脂フィルムなどを用いることができる。例えば、PETフィルムやポリオレフィンフィルム(ポリエチレン、ポリプロピレンなど)を用いることができる。裏面層4は、JIS K 7129Bにおいて、例えば、水蒸気透過度が5g/m・d以下であり、好ましくは4g/m・d以下である。裏面層4は、針葉樹合板層2の裏面側から水分が浸入するのを効果的に抑制することができる。裏面層4は、接着剤以外の固定部材によって針葉樹合板層2に固定されていてもよい。突板の場合、厚さ0.1〜0.4mm、紙・フィルムの場合、5〜100μmのものを用いることができる。
(B) Back material 4
The back material 4 is for reducing warpage during the manufacturing process or during use. For example, a veneer, paper, a resin film, or the like can be used. For example, a PET film or a polyolefin film (polyethylene, polypropylene, etc.) can be used. The back layer 4 has, for example, a water vapor permeability of 5 g / m 2 · d or less, preferably 4 g / m 2 · d or less in JIS K 7129B. The back surface layer 4 can effectively prevent moisture from entering from the back surface side of the softwood plywood layer 2. The back surface layer 4 may be fixed to the softwood plywood layer 2 by a fixing member other than an adhesive. In the case of a veneer, a thickness of 0.1 to 0.4 mm can be used.

(c)化粧貼内装材の製造方法について
化粧貼内装材は、上記の木質複合基材10と、化粧材3と、必要に応じて裏面材4とを、従来公知の製造方法を組み合わせることにより製造することが可能である。例えば、上記の木質複合基材10に、接着剤を介在させた状態で、通常の方法で製造された化粧材3(または裏面材4)を積層し、所定の圧力、温度、時間のプレス加工を行い、製造することができる。
(C) About the manufacturing method of a makeup | decoration sticking interior material The makeup | decoration sticking interior material combines the above-mentioned wooden composite base material 10, the decoration material 3, and the back material 4 as needed, and a conventionally well-known manufacturing method. It is possible to manufacture. For example, the wood composite base material 10 is laminated with a decorative material 3 (or back material 4) manufactured by a normal method with an adhesive interposed, and is pressed at a predetermined pressure, temperature, and time. Can be manufactured.

本発明の効果を確認するべく、各種の針葉樹合板に厚さ2.0mmのハードボードまたは2.7mmのMDFを貼り付けた木質複合基材について、各種の試験を行った。なお、針葉樹合板は、所定の厚みの単板に、フェノール樹脂接着剤を塗布し、冷圧工程・熱圧工程により接着した後、所定の厚みとなるように表裏面を研削して、製造した。また、針葉樹合板へのハードボードまたはMDFの貼り付けは、変性酢酸ビニル系接着剤を使用し、110℃、80秒の熱圧により行った。 In order to confirm the effect of the present invention, various tests were performed on a wood composite base material in which a hard board having a thickness of 2.0 mm or an MDF having a thickness of 2.7 mm was attached to various softwood plywoods. The softwood plywood was manufactured by applying a phenolic resin adhesive to a single veneer with a predetermined thickness, adhering by a cold pressure process / hot pressure process, and then grinding the front and back surfaces to a predetermined thickness. . Further, the hardboard or MDF was attached to the softwood plywood by using a modified vinyl acetate adhesive at a temperature of 110 ° C. for 80 seconds.

得られた木質複合基材の表面に、厚さ0.30mmの化粧単板(樹種:ナラ)を貼り付けた。貼り付けには、メラミンユリア共重合接着剤を使用し、110℃、60秒熱圧して接着した。その後、実加工工程、塗装工程を実施し、床材を得た。   A decorative veneer having a thickness of 0.30 mm (tree species: oak) was attached to the surface of the obtained wood composite base material. For the pasting, a melamine urea copolymer adhesive was used and bonded by heating at 110 ° C. for 60 seconds. Then, the actual processing process and the painting process were carried out to obtain a flooring.

<曲げヤング率>
各種の床材から採取した50mm×300mmサイズの試験片について、巾50mm、スパン250mm、荷重速度10mm/minで、曲げ試験を行い、荷重と変位の関係から曲げヤング率を計算した。曲げヤング率は、3.0GPa以上を合格とした。
<Bending Young's modulus>
A 50 mm × 300 mm size test piece collected from various flooring materials was subjected to a bending test at a width of 50 mm, a span of 250 mm, and a load speed of 10 mm / min, and the bending Young's modulus was calculated from the relationship between the load and the displacement. The bending Young's modulus passed 3.0 GPa or more.

<試験前反り>
303mm×1818mmの床材を平滑なテーブル上に載置し、長さ方向・巾方向の反りの矢高を測定した。巾反りは、床材の長さ方向に5点測定した平均値である。試験前反りは、長さ方向が±15.0mm以内、巾方向が±0.7mm以内であるものを合格とした。
<War before test>
A flooring of 303 mm × 1818 mm was placed on a smooth table, and the heights of warps in the length direction and the width direction were measured. The warp is an average value measured at five points in the length direction of the flooring. The warp before the test was determined to be acceptable if the length direction was within ± 15.0 mm and the width direction was within ± 0.7 mm.

<乾燥試験前後の反り>
303mm×1818mmの床材を、温度40℃、湿度30%の乾燥環境に2週間放置し、試験前後の長さ反りおよび巾反りを測定し、試験前後における反りの変化量を求めた。反りの測定方法は、試験前反りと同様である。試験前後における反りの変化量は、長さ方向が±15.0mm以内、巾方向が±1.0mm以内であるものを合格とした。
<Warpage before and after drying test>
A 303 mm × 1818 mm flooring was left in a dry environment at a temperature of 40 ° C. and a humidity of 30% for 2 weeks, and the length warpage and width warpage before and after the test were measured to determine the amount of change in warpage before and after the test. The method for measuring warpage is the same as that for warping before the test. The amount of change in warpage before and after the test was determined to be acceptable if the length direction was within ± 15.0 mm and the width direction was within ± 1.0 mm.

<床暖房試験>
303mm×1818mmの床材を床暖房用温水マットの上に施工し、80℃の温水を1100時間連続通湯し、その後の巾反り、短辺部(エンド)の隙の変化量を測定した。巾反りの測定方法は、試験前反りと同様である。巾反りは、すべての測定点において±1.0mm以内を合格とした。短辺部(エンド)の隙の変化量は、±0.5mm以内を合格とした。
<Floor heating test>
A floor material of 303 mm × 1818 mm was applied on a warm water mat for floor heating, hot water at 80 ° C. was continuously passed for 1100 hours, and then the amount of change in the gap at the short side (end) was measured. The method for measuring the width warpage is the same as that for the warp before the test. The width warpage was acceptable within ± 1.0 mm at all measurement points. The amount of change in the gap on the short side (end) was within ± 0.5 mm.

Figure 2018003358
Figure 2018003358

表1に示すように、実施例1〜5では、完成時(試験前)の反りが小さく、乾燥環境でも反りの変化は小さかった。特に、実施例1では、床暖房試験後の反り・隙も小さかった。   As shown in Table 1, in Examples 1 to 5, warpage at the time of completion (before the test) was small, and the change in warpage was small even in a dry environment. In particular, in Example 1, the warp / gap after the floor heating test was also small.

一方、比較例1〜3は、いずれもクロス比率(LC/(LL+LC))が0.50未満である。いずれも完成時の反りは問題ない。特に、比較例1、2では、第二層および第四層に比較的密度が低いスギを用いており、乾燥環境の反りの変化が大きかった。また、比較例3では、第一層、第三層および第五層に比較的密度が低いスギを、第二層および第四層に比較的密度が高いカラマツを用いており、乾燥試験でも、床暖房試験でも、反りの変化が大きかった。 On the other hand, in Comparative Examples 1 to 3, the cross ratio (L C / (L L + L C )) is less than 0.50. In either case, there is no problem with the warp upon completion. Particularly, in Comparative Examples 1 and 2, cedar having a relatively low density was used for the second layer and the fourth layer, and the change in the warping of the dry environment was large. In Comparative Example 3, cedar having a relatively low density is used for the first layer, the third layer, and the fifth layer, and larch having a relatively high density is used for the second layer and the fourth layer. In the floor heating test, the change in warpage was large.

本発明によれば、表面の凹凸性状に優れ、反りが少ない、針葉樹合板の表面に木質繊維板を接着した木質複合基材、さらには、このような木質複合基材を用いた床材を提供することができる。   According to the present invention, there is provided a wood composite base material in which a wood fiber board is bonded to the surface of a softwood plywood, which has excellent surface irregularity properties and little warpage, and further, a flooring using such a wood composite base material is provided. can do.

1 木質繊維板層
2 針葉樹合板層
21 第一層(単板層)
22 第二層(単板層)
23 第三層(単板層)
24 第四層(単板層)
25 第五層(単板層)
3 化粧材
4 裏面材
10 本実施形態に係る木質複合基材
100 本実施形態に係る床材
1 Wood fiber board layer 2 Softwood plywood layer 21 First layer (single board layer)
22 Second layer (single plate layer)
23 Third layer (single plate layer)
24 Fourth layer (single plate layer)
25 Fifth layer (single plate layer)
DESCRIPTION OF SYMBOLS 3 Cosmetic material 4 Back surface material 10 The wood composite base material 100 which concerns on this embodiment The flooring which concerns on this embodiment

Claims (6)

5プライの針葉樹合板層と、
前記針葉樹合板層に接着された木質繊維板層と、を備える木質複合基材であって、
前記針葉樹合板層の第一層、第三層および第五層の合計厚さをLL、第二層および第四層の合計厚さをLCとするとき、LC/(LL+LC)が0.50〜0.70である、
木質複合基材。
A 5-ply softwood plywood layer;
A wood composite substrate comprising a wood fiberboard layer bonded to the conifer plywood layer,
When the total thickness of the first, third and fifth layers of the softwood plywood layer is L L and the total thickness of the second and fourth layers is L C , L C / (L L + L C ) Is 0.50 to 0.70,
A wood composite substrate.
前記第一層および前記第五層を同じ針葉樹(以下、「樹種1」という)の単板で構成し、前記第二層および前記第四層を同じ針葉樹(以下、「樹種2」という)の単板で構成し、前記樹種1の気乾比重が、前記樹種2の気乾比重よりも高い、
請求項1に記載の木質複合基材。
The first layer and the fifth layer are composed of a single plate of the same conifer (hereinafter referred to as “tree species 1”), and the second layer and the fourth layer of the same conifer (hereinafter referred to as “tree species 2”) Consists of a single plate, the air-dry specific gravity of the tree species 1 is higher than the air-dry specific gravity of the tree species 2,
The woody composite substrate according to claim 1.
木質繊維板層が、ハードボードで構成される、
請求項1または2に記載の木質複合基材。
The wood fiberboard layer is composed of hardboard,
The woody composite substrate according to claim 1 or 2.
前記針葉樹合板層の厚さが、8.0〜12.0mmである、
請求項1から3までのいずれかに記載の木質複合基材。
The thickness of the conifer plywood layer is 8.0 to 12.0 mm,
The woody composite substrate according to any one of claims 1 to 3.
前記木質繊維板層の厚さが、1.0〜3.0mmである、
請求項1から4までのいずれかに記載の木質複合基材。
The thickness of the wood fiberboard layer is 1.0 to 3.0 mm,
The woody composite substrate according to any one of claims 1 to 4.
請求項1から5までのいずれかに記載の木質複合基材の表面に化粧材を貼り付けた、
床材。

A decorative material is pasted on the surface of the woody composite base material according to any one of claims 1 to 5.
Flooring.

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JP2018035535A (en) * 2016-08-30 2018-03-08 東洋テックス株式会社 Floor material and manufacturing method thereof
RU182306U1 (en) * 2018-03-05 2018-08-14 Федеральное государственное бюджетное образовательное учреждение высшего образования "Поволжский государственный технологический университет" Wood Bark Composite Material
JP2020012311A (en) * 2018-07-19 2020-01-23 株式会社ノダ Floor material
CN109227849A (en) * 2018-10-22 2019-01-18 嘉善汇佳乐装饰材料有限公司 A kind of environment wood floor based on waste wood preparation

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