JP2009051102A - Building plate and method for manufacturing building plate - Google Patents

Building plate and method for manufacturing building plate Download PDF

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JP2009051102A
JP2009051102A JP2007220294A JP2007220294A JP2009051102A JP 2009051102 A JP2009051102 A JP 2009051102A JP 2007220294 A JP2007220294 A JP 2007220294A JP 2007220294 A JP2007220294 A JP 2007220294A JP 2009051102 A JP2009051102 A JP 2009051102A
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polymeric mdi
decorative sheet
paper
wood
face sheet
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Masahiro Nakagawa
雅博 中川
Shinichi Suzuki
伸一 鈴木
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Panasonic Electric Works Co Ltd
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Panasonic Electric Works Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for manufacturing a building plate which can prevent polymeric MDI from being oozed out onto the surface of a face sheet to adhere to a press plate when modifying the surface strength with the polymeric MDI, and also suppress the occurrence of cracks and wrinkles. <P>SOLUTION: The method for manufacturing the building plate comprises applying a coating liquid having polymeric MDI 4 as a principal component on the surface of a wood substrate 1, superimposing the face sheet 3 on this surface of the wood substrate 1 via a paper 2, and then carrying out heating and pressurization to stick the face sheet 3 on the wood substrate 1. Redundant polymeric MDI is absorbed by the paper 2, thereby allowing the polymeric MDI 4 to be prevented from being oozed out onto the surface of the face sheet 3. Further, the paper 2 laminated between the wood substrate 1 and the face sheet 3 can reduce a difference in expansion and contraction of the wood substrate 1 and the face sheet 3 in a fiber direction, and suppress the occurrence of the crack and the wrinkle. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

本発明は、床、壁、天井、ドア、造作等の内装材、家具やキッチン等の箱物部材、ウッドデッキやフェンス等のエクステリア部材などに用いられる建築板及びその製造方法に関するものである。   The present invention relates to a building board used for interior materials such as floors, walls, ceilings, doors, and structures, box members such as furniture and kitchens, exterior members such as wood decks and fences, and a method for manufacturing the same.

木材で形成される上記のような建築板において、表面の硬度や耐傷性などの表面強度が要求される場合が多い。例えば床材は、キャスターや落下物などによって損傷が生じ易いので、表面強度が特に高く要求される。またドアや壁なども物が当たることによって凹みなどが生じ易いため、同様に表面強度が高く要求される。このため、従来から木材の表面を強化する方法が各種提案されている。   In the above-mentioned building board made of wood, surface strength such as surface hardness and scratch resistance is often required. For example, floor materials are required to have a particularly high surface strength because they are easily damaged by casters or falling objects. Also, since doors and walls are easily dented by hitting objects, the surface strength is similarly required to be high. For this reason, various methods for reinforcing the surface of wood have been proposed.

例えば、古くは、との粉等のフィラーとバインダーとの混合物を木材の表面に刷り込んで充填する方法があるが、この方法では極表面のみが硬くなり、キャスターのような荷重ストレスには効果が期待できない。   For example, in the old days, there is a method in which a mixture of a filler such as powder and a binder is imprinted on the surface of wood and filled, but this method only hardens the extreme surface and is effective for load stress such as casters. I can't expect it.

また最近では、木材に樹脂を含浸して硬化させたり、木材の表面に紙を貼ってこの紙に樹脂を含浸・硬化させたりする方法や、木材の表面にプラスチックシート、MDF、HDF、樹脂含浸シート等の硬質材料を貼る方法などが実施されているが、これらの方法は高い強度を期待することができる反面、工数や材料コストなどがかかり、製造コストが高くなるという問題がある。   Recently, wood is impregnated with resin and cured, or paper is affixed to the surface of wood and resin is impregnated and cured, or plastic sheet, MDF, HDF, resin impregnation on the surface of wood. A method of applying a hard material such as a sheet has been practiced. However, these methods can be expected to have high strength, but have a problem that man-hours, material costs, and the like are increased and manufacturing costs are increased.

また木材の表面を圧密化する方法もあるが、この場合には材料体積減が大きいので、材料コストが高くなるという問題がある。   There is also a method of consolidating the surface of the wood, but in this case there is a problem that the material cost increases because the material volume is greatly reduced.

さらに木材の表面に硬質塗装を行なう方法があるが、この方法では表面の鉛筆硬度を向上する程度の効果はあるが、床材等の建材に必要とされるキャスターや落下物に対する損傷に対する強度を期待することはできない。   In addition, there is a method of hard coating on the surface of wood, but this method has the effect of improving the pencil hardness of the surface, but the strength against damage to casters and falling objects required for building materials such as flooring. I can't expect.

また、特許文献1には、木材の表面にヘキサメチレンジイソシアネートなどのイソシアネートを含浸させて硬化させることによって、木材の表層を改質する方法が提案されている。しかしこのものでは、イソシアネートの含浸を均一にするために、木材の表面を圧密化する工程が必要であり、上記の圧密化の方法と同様な問題があると共に、圧密化のための特別な工程によって製造コストが上昇するという問題もあった。
特許第3715982号公報
Patent Document 1 proposes a method for modifying the surface layer of wood by impregnating the surface of wood with an isocyanate such as hexamethylene diisocyanate and curing it. However, in this case, in order to make the isocyanate impregnation uniform, a step of compacting the surface of the wood is necessary, and there are the same problems as the above-mentioned consolidation method, and a special step for consolidation As a result, there is a problem that the manufacturing cost increases.
Japanese Patent No. 3715982

そこで本出願人は、イソシアネートとしてポリメリックMDIを用い、木材の表面にポリメリックMDIを塗布し、この上に化粧シートを重ねた後、加熱加圧する方法を提案した(特願2006−122597参照)。ポリメリックMDIは粘度が低く木材の表面内や化粧シート内に浸透し易いので、このように浸透させたポリメリックMDIを硬化させることによって、化粧シートの貼り付けと同時に、ポリメリックMDIからなる硬質ポリウレタンで表面強度を高める改質を行なうことができるのである。   Therefore, the present applicant has proposed a method in which polymeric MDI is used as an isocyanate, polymeric MDI is applied to the surface of wood, a decorative sheet is stacked thereon, and then heated and pressurized (see Japanese Patent Application No. 2006-122597). Polymeric MDI has a low viscosity and easily penetrates into the surface of wood and decorative sheets. By curing the polymerized MDI in this way, the surface is coated with hard polyurethane made of polymeric MDI at the same time as the decorative sheet is applied. Modifications that increase strength can be performed.

しかし、ポリメリックMDIは上記のように浸透性が高いので、木材にポリメリックMDIを塗布して化粧シートを重ね、プレス板で加熱加圧を行なう際に、化粧シートの表面にポリメリックMDIが染み出してプレス板に付着することがあり、このように化粧シートの表面のポリメリックMDIがプレス板に付着したまま硬化すると、プレス板を離型することができなくなったり、プレス板を離型する際にプレス板に付着した化粧シートが木質基材から剥されたりするおそれがあるという問題があった。また木材は繊維と平行な方向と直交する方向において膨張・収縮差が大きいため、特に化粧シートとして木質の突き板を用いる場合、この膨張・収縮差でクラックや皺などが発生するおそれがあるという問題もあった。   However, since polymeric MDI has high permeability as described above, when polymeric MDI is applied to wood and a decorative sheet is stacked and heated and pressed with a press plate, polymeric MDI oozes out on the surface of the decorative sheet. If the polymeric MDI on the surface of the decorative sheet is cured while adhering to the press plate, the press plate cannot be released or the press plate is released when the press plate is released. There was a problem that the decorative sheet attached to the board might be peeled off from the wooden substrate. Also, because wood has a large expansion / contraction difference in the direction perpendicular to the direction parallel to the fibers, especially when a wooden veneer is used as a decorative sheet, this expansion / contraction difference may cause cracks, wrinkles, etc. There was also a problem.

本発明は上記の点に鑑みてなされたものであり、ポリメリックMDIを用いて表面強度を改質するにあたって、化粧シートの表面にポリメリックMDIが染み出してプレス板に付着することを防ぐことができると共に、またクラックや皺の発生を抑制することができる建築板の製造方法を提供することを目的とするものである。   The present invention has been made in view of the above points, and in modifying the surface strength using the polymeric MDI, it is possible to prevent the polymeric MDI from seeping out and adhering to the press plate on the surface of the decorative sheet. And it aims at providing the manufacturing method of the building board which can suppress generation | occurrence | production of a crack and a wrinkle.

本発明に係る建築板の製造方法は、木質基材の表面にポリメリックMDIを主成分とする塗布液を塗布し、木質基材のこの表面に紙を介して化粧シートを重ねた後、加熱加圧して木質基材に化粧シートを貼り付けることを特徴とするものである。   In the method for manufacturing a building board according to the present invention, a coating liquid mainly composed of polymeric MDI is applied to the surface of a wooden base material, and a decorative sheet is stacked on the surface of the wooden base material through paper, followed by heating. The decorative sheet is applied to the wooden substrate by pressing.

この発明によれば、ポリメリックMDIを木質基材の表層や化粧シート内に良好に浸透させた状態で加熱加圧して、ポリメリックMDIが硬化した硬質ポリウレタンで化粧シートの貼り付けと同時に、表面強度を高める改質を行なうことができるものである。また化粧シートの背面側に重ねられた紙に余分なポリメリックMDIが吸収されることによって、化粧シートの表面にポリメリックMDIが染み出すことを防ぐことができ、プレス板にポリメリックMDIが付着して硬化することを防止できると共に、木質基材と化粧シートの間に積層される紙によって、木質基材や化粧シートの繊維方向での膨張・収縮差を緩和することができ、クラックや皺の発生を抑制することができるものである。   According to this invention, the polymeric MDI is heated and pressed in a state where the polymeric MDI is satisfactorily permeated into the surface of the wood substrate and the decorative sheet, and the surface strength is improved simultaneously with the application of the decorative sheet with the hard polyurethane hardened by the polymeric MDI. It is possible to perform a modification that enhances. In addition, excess polymeric MDI is absorbed by the paper stacked on the back side of the decorative sheet, so that the polymeric MDI can be prevented from seeping out on the surface of the decorative sheet, and the polymeric MDI adheres to the press plate and cures. The paper laminated between the wood base and the decorative sheet can alleviate the difference in expansion and contraction in the fiber direction of the wood base and the decorative sheet, thereby preventing the generation of cracks and wrinkles. It can be suppressed.

また本発明は、上記の塗布液として、ポリメリックMDIを主成分とし、離型剤を分散させたものを用いることを特徴とするものである。   In addition, the present invention is characterized in that the above-mentioned coating solution is composed of a polymeric MDI as a main component and a release agent dispersed therein.

この発明によれば、化粧シートの表面にポリメリックMDIが染み出しても、プレス板に化粧シートが付着することを離型剤によって防ぐことができ、プレス板に化粧シートが付着して木質基材から剥がれたりすることを確実に防止できるものである。   According to this invention, even if the polymeric MDI oozes out on the surface of the decorative sheet, the release sheet can prevent the decorative sheet from adhering to the press plate, and the decorative sheet adheres to the press plate and the wooden substrate It can be surely prevented from peeling off.

本発明に係る建築板は、上記の各方法で製造されたものであり、表面の強度が高く、キャスターや落下物などに対する耐損傷性が高いと共に、クラックや皺の発生を低減できるものである。   The building board according to the present invention is manufactured by the above-described methods, has high surface strength, high damage resistance against casters and falling objects, and can reduce the occurrence of cracks and wrinkles. .

本発明によれば、ポリメリックMDIを用いて化粧シートの貼り付けと同時に、表面強度を高める改質を行なうにあたって、化粧シートの背面側に重ねられた紙に余分なポリメリックMDIが吸収されることによって、化粧シートの表面にポリメリックMDIが染み出すことを防ぐことができ、プレス板にポリメリックMDIが付着して硬化することを防止できると共に、木質基材と化粧シートの間に積層される紙によって、木質基材や化粧シートの繊維の方向による膨張・収縮差を緩和することができ、クラックや皺の発生を抑制することができるものである。   According to the present invention, when the decorative sheet is pasted using the polymeric MDI and at the same time the surface strength is improved, the excess polymeric MDI is absorbed by the paper stacked on the back side of the decorative sheet. In addition, it is possible to prevent the polymeric MDI from oozing out on the surface of the decorative sheet, to prevent the polymeric MDI from adhering to the press plate and curing, and by the paper laminated between the wooden substrate and the decorative sheet, The expansion / contraction difference due to the direction of the fibers of the wooden substrate or the decorative sheet can be alleviated, and the generation of cracks and wrinkles can be suppressed.

以下、本発明を実施するための最良の形態を説明する。   Hereinafter, the best mode for carrying out the present invention will be described.

木質材の表面を効果的に強化するためには、木質材が有する空隙に良好に浸透して充填できることが必要である。そして木質材の空隙は細かいうえに不定形であるので、この空隙に良好に浸透させて充填するためには、粘度が低く木質材との馴染みが良いことが必要であり、このために本発明ではポリメリックMDIを用いるものである。ポリメリックMDIは次の化学構造式からなるポリメチレンポリフェニルポリイソシアネートであり、100〜200mPa・sec(at25℃)程度の低い粘度を有する液体である。本発明では、ポリメリックMDIを他の成分と混合して、ポリメリックMDIを主成分とする溶液を調製して塗布液として使用することができるが、ポリメリックMDIをそれ単独で塗布液として用いることもできる。   In order to effectively strengthen the surface of the wood material, it is necessary to be able to satisfactorily penetrate and fill the voids of the wood material. Since the gaps in the wood material are fine and irregular, it is necessary to have a low viscosity and good familiarity with the wood material in order to satisfactorily penetrate and fill the gaps. Then, polymeric MDI is used. Polymeric MDI is a polymethylene polyphenyl polyisocyanate having the following chemical structural formula, and is a liquid having a low viscosity of about 100 to 200 mPa · sec (at 25 ° C.). In the present invention, polymeric MDI can be mixed with other components to prepare a solution containing polymeric MDI as a main component and used as a coating solution. However, polymeric MDI can be used alone as a coating solution. .

Figure 2009051102
Figure 2009051102

ポリメリックMDIを主成分とする塗布液には、離型剤を分散させて使用することもできる。離型剤としては、ポリエチレンワックスエマルジョンなどのワックスエマルジョンを用いることができる。離型剤の添加量は、ポリメリックMDI100質量部に対して1〜5質量部の範囲が好ましい。離型剤の添加量が1質量部未満であると、後述のように加熱加圧を行なう際に化粧シートがプレス板に付着することを離型剤で低減する効果を十分に得ることができない。逆に離型剤の添加量が5質量部を超えると、木質基材に対する化粧シートの接着強度が離型剤によって低下するおそれがある。   In the coating liquid mainly composed of polymeric MDI, a release agent can be dispersed and used. As the mold release agent, a wax emulsion such as a polyethylene wax emulsion can be used. The addition amount of the release agent is preferably in the range of 1 to 5 parts by mass with respect to 100 parts by mass of the polymeric MDI. When the addition amount of the release agent is less than 1 part by mass, it is not possible to sufficiently obtain the effect of reducing the adhesion of the decorative sheet to the press plate with the release agent when heating and pressurizing as described later. . On the contrary, when the addition amount of the release agent exceeds 5 parts by mass, the adhesive strength of the decorative sheet to the wooden substrate may be lowered by the release agent.

本発明において木質基材としては、合板やむく材など任意の木質材を用いることができるものであり、まずこの木質基材の表面にポリメリックMDIを主成分とする塗布液を塗布する。塗布量は木質基材の材質や要求される強化性能などに応じて任意設定されるものであり、特に限定されるものでないが、ポリメリックMDIの塗布量が50〜150g/mの範囲になるように設定するのが好ましい。ポリメリックMDIの塗布量が50g/m未満であると、後述のようにポリメリックMDIを接着剤として木質基材に紙と化粧シートを貼り付ける際の接着強度が不十分になるおそれがあり、逆にポリメリックMDIの塗布量が150g/mを超えると、後述のように加熱加圧する際にポリメリックMDIが化粧シートの表面に染み出すおそれがある。 In the present invention, any wooden material such as plywood or stripping material can be used as the wooden substrate. First, a coating solution containing polymeric MDI as a main component is applied to the surface of the wooden substrate. The coating amount is arbitrarily set according to the material of the wooden base material or the required reinforcing performance, and is not particularly limited, but the coating amount of polymeric MDI is in the range of 50 to 150 g / m 2. It is preferable to set as follows. If the coating amount of the polymeric MDI is less than 50 g / m 2 , the adhesive strength when the paper and the decorative sheet are attached to the wooden base material using the polymeric MDI as an adhesive as described below may be insufficient. If the coating amount of the polymeric MDI exceeds 150 g / m 2 , the polymeric MDI may ooze out on the surface of the decorative sheet when heated and pressurized as described later.

尚、ポリメリックMDIの硬化を促進するために、トリエタノールアミン等の硬化促進剤を用いることができる。硬化促進剤は、ポリメリックMDIを主成分とする塗布液に直接添加するようにしてもよく、あるいは木質基材の表面に予め硬化促進剤を塗布しておいてもよい。またポリメリックMDIを主成分とする塗布液を木質基材の表面に過剰に塗布して、余分なものを掻き取るようにしてもよい。このようにすれば均一な塗布量となり、表面の強度向上の効果が安定するものである。さらに、表面強度の向上をより安定化させるため、ポリメリックMDIに一般の湿気硬化型ウレタン接着剤を配合し、粘度調整をするようにしてもよい。但しこの場合、ウレタン接着剤の配合量が多くなると本発明の効果は低下するので、ウレタン接着剤の配合量は全体の6割以下にするのが望ましい。   In order to accelerate the curing of the polymeric MDI, a curing accelerator such as triethanolamine can be used. The curing accelerator may be added directly to the coating liquid containing polymeric MDI as a main component, or the curing accelerator may be applied in advance to the surface of the wooden substrate. Alternatively, a coating solution mainly composed of polymeric MDI may be applied excessively to the surface of the wooden substrate, and the excess may be scraped off. If it does in this way, it will become a uniform coating amount and the effect of the surface strength improvement will be stabilized. Furthermore, in order to stabilize the improvement of the surface strength, a general moisture curable urethane adhesive may be blended with the polymeric MDI to adjust the viscosity. However, in this case, since the effect of the present invention is reduced when the amount of the urethane adhesive is increased, the amount of the urethane adhesive is desirably 60% or less of the whole.

次に、ポリメリックMDIを主成分とする塗布液を塗布した木質基材の表面に紙を重ね、さらに紙の上に化粧シートを重ねる。紙としてはクラフト紙など任意のものを用いることができるものであり、特に限定されるものではないが、目付け重量が30〜150g/m程度のものが好ましい。また化粧シートとしては、木質スライス単板の突き板や化粧紙など任意のものを用いることができる。 Next, paper is overlaid on the surface of the wooden base material coated with a coating liquid mainly composed of polymeric MDI, and a decorative sheet is further overlaid on the paper. Any paper such as kraft paper can be used as the paper, and it is not particularly limited, but paper having a basis weight of about 30 to 150 g / m 2 is preferable. Moreover, as a decorative sheet, arbitrary things, such as a veneer of a wooden slice veneer and decorative paper, can be used.

ポリメリックMDIは木質材や紙との馴染みが良く、また低粘度であるので、木質基材の表層部内に容易に浸透し、また紙を通して化粧シート内に浸透するものである。図1において1は木質基材、2は紙、3は化粧シートであり、ポリメリックMDI4は図1のように木質基材1の表層部内、及び紙2内、化粧シート3内に浸透する。   Polymeric MDI is familiar with wooden materials and paper and has a low viscosity, so that it easily penetrates into the surface layer portion of the woody base material and penetrates into the decorative sheet through the paper. In FIG. 1, 1 is a wooden substrate, 2 is paper, 3 is a decorative sheet, and the polymeric MDI 4 penetrates into the surface layer portion of the wooden substrate 1, the paper 2 and the decorative sheet 3 as shown in FIG.

そしてこの後、プレス板を用いて上下から木質基材と化粧シートを加熱加圧する。ポリメリックMDIはこのように加熱することによって、空気中の水分や、木質基材、紙、化粧シートに含まれる水分の作用で容易に硬化する。ポリメリックMDIが水分の作用で硬化する際に、炭酸ガスが発生するが、ポリメリックMDIに水を混合した場合のような急激な炭酸ガスの発生ではないので、パンク不良のような問題は発生しない。加熱加圧の条件は特に限定されるものではないが、温度100〜140℃、圧力0.2〜1.5MPa、時間1〜5分の範囲に設定するのが好ましい。   Thereafter, the wood base material and the decorative sheet are heated and pressurized from above and below using a press plate. By heating the polymer MDI in this manner, the polymer MDI is easily cured by the action of moisture in the air and moisture contained in the wooden substrate, paper, and decorative sheet. Carbonic acid gas is generated when the polymeric MDI is cured by the action of moisture, but since carbon dioxide gas is not generated as rapidly as when water is mixed with the polymeric MDI, problems such as puncture failure do not occur. The heating and pressurizing conditions are not particularly limited, but it is preferable to set the temperature to 100 to 140 ° C., the pressure 0.2 to 1.5 MPa, and the time 1 to 5 minutes.

このように木質基材や化粧シートにポリメリックMDIを浸透させた状態で加熱加圧して硬化させることによって、ポリメリックMDIが硬化した硬質ポリウレタンで表面強度を改質し、表面硬度や耐傷付性に優れた建築板を得ることができるものである。またこのとき同時にポリメリックMDIを接着剤として化粧シートを木質基材に貼り付けることができるものであり、表面強度の改質と化粧シートの接着の工程を兼用することができるものである。   In this way, the surface strength is modified with hard polyurethane cured by polymeric MDI by curing with heating and pressurization with polymeric MDI infiltrated into the wood substrate or decorative sheet, and it has excellent surface hardness and scratch resistance. You can get a building board. At the same time, the decorative sheet can be affixed to the wooden base material using the polymeric MDI as an adhesive, and the process of modifying the surface strength and adhering the decorative sheet can be combined.

そして上記のように木質基材や化粧シートにポリメリックMDIを浸透させた状態で、プレス板で加熱加圧するにあたって、化粧シートに過剰に浸透しているポリメリックMDIが加圧によって化粧シートの表面に染み出すおそれがある。このように化粧シートの表面にポリメリックMDIが染み出した状態でプレス板で加熱加圧すると、化粧シートの表面のポリメリックMDIがプレス板に付着したまま硬化し、プレス板を離型することができなくなったり、プレス板を離型する際にプレス板に付着した化粧シートが木質基材から剥されたりするおそれがある。このため本発明では、木質基材のポリメリックMDIを塗布した表面に紙を介して化粧シートを重ねることによって、木質基材に塗布されたポリメリックMDIの余分なものを紙に吸収させ、化粧シートにポリメリックMDIが過剰に浸透することを防ぐようにしているものである。従って、プレス板で加熱加圧するにあたって、化粧シートの表面に染み出したポリメリックMDIがプレス板に付着して硬化するようなことがなくなり、加熱加圧後に、プレス板が離型できなくなったり化粧シートが木質基材から剥れたりするようなことを防ぐことができるものである。   In the state where the polymeric MDI is infiltrated into the wooden base material or the decorative sheet as described above, when the pressure plate is heated and pressed, the polymeric MDI that is excessively permeated into the decorative sheet stains the surface of the decorative sheet by the pressurization. There is a risk of release. Thus, when the press plate is heated and pressed with the polymeric MDI exuding on the surface of the decorative sheet, the polymeric MDI on the surface of the decorative sheet is cured while adhering to the press plate, and the press plate can be released. There is a risk that the decorative sheet attached to the press plate may be peeled off from the wooden substrate when the press plate is released. For this reason, in the present invention, by superimposing a decorative sheet through paper on the surface coated with the polymeric MDI of the wood base material, the excess of the polymeric MDI applied to the wooden base material is absorbed by the paper, and the decorative sheet is formed. It prevents the polymeric MDI from penetrating excessively. Therefore, when the press plate is heated and pressed, the polymeric MDI that has oozed out on the surface of the decorative sheet will not adhere to the press plate and harden, and the press plate cannot be released after the hot press. Can be prevented from peeling off from the wooden substrate.

また、上記のようにポリメリックMDIに離型剤を分散させておくことによって、仮にポリメリックMDIが化粧シートを浸透して表面に染み出すことがあっても、ポリメリックMDIがプレス板に接着して化粧シートがプレス板に貼り付くことを離型剤で防ぐことができるものであり、加熱加圧後にプレス板を離型する際に、プレス板を離型することが困難になったり、化粧シートが木質基材から剥がれたりすることを防止することができるものである。特に離型剤としてワックスエマルジョンを用いる場合、ポリメリックMDIが染み出す際に、ワックスエマルジョンも加熱加圧時に水蒸気とともに化粧シートを透過して表面に出てくるものであり、分子量の大きなポリメリックMDIが離型剤によって包まれることになる。このようにポリメリックMDIを包み込むワックスエマルジョンの離型効果によって、プレス板にポリメリックMDIが付着することを確実に防ぐことができるものである。   In addition, by dispersing the release agent in the polymeric MDI as described above, the polymeric MDI adheres to the press plate even if the polymeric MDI penetrates the decorative sheet and oozes out to the surface. The release agent can prevent the sheet from sticking to the press plate. When the press plate is released after heating and pressing, it becomes difficult to release the press plate, It can prevent peeling from the wooden substrate. In particular, when a wax emulsion is used as a mold release agent, when the polymeric MDI exudes, the wax emulsion also permeates through the decorative sheet together with water vapor during heating and pressurization and emerges on the surface, and the polymeric MDI having a large molecular weight is released. It will be wrapped by the mold. Thus, the release effect of the wax emulsion that wraps the polymeric MDI can surely prevent the polymeric MDI from adhering to the press plate.

また、木質基材は繊維と平行な方向と直交する方向において膨張・収縮差が大きいため、この膨張・収縮差でクラックや皺などが発生し易く、特に化粧シートとして木質の突き板を用いる場合にこの傾向が大きくなるが、上記のように木質基材と化粧シートの間に紙が積層してあるので、紙によって木質基材や化粧シートの繊維の方向による膨張・収縮差を緩和することができ、クラックや皺の発生を抑制することができるものである。   In addition, the wooden base material has a large expansion / contraction difference in the direction perpendicular to the direction parallel to the fiber, so cracks and wrinkles are likely to occur due to this expansion / contraction difference, especially when using a wooden veneer as a decorative sheet However, since the paper is laminated between the wood base and the decorative sheet as described above, the paper can alleviate the difference in expansion and contraction depending on the fiber direction of the wood base and the decorative sheet. And the generation of cracks and wrinkles can be suppressed.

次に、本発明を実施例によって具体的に説明する。   Next, the present invention will be specifically described with reference to examples.

(実施例1)
木質基材として、厚み12mmの表面ラワン合板を用いた。そしてこの木質基材の表面にポリメリックMDI(三井化学ポリウレタン株式会社製「コスモネートM−100」)を100g/mの塗布量で塗布した。
(Example 1)
A surface Lauan plywood having a thickness of 12 mm was used as the wood substrate. Polymeric MDI (“Cosmonate M-100” manufactured by Mitsui Chemicals Polyurethane Co., Ltd.) was applied to the surface of the wooden substrate at a coating amount of 100 g / m 2 .

次に、木質基材のポリメリックMDIを塗布した面に、目付け30g/mの紙と、なら材のスライス単板からなる厚み0.3mmの化粧シートをこの順に重ねた。 Next, a decorative sheet having a thickness of 0.3 mm made of a paper slice of 30 g / m 2 and a single slice of material was laminated in this order on the surface of the wood substrate coated with polymeric MDI.

この後、木質基材をプレス板の間にセットし、120℃、0.68MPa(7kg/cm)、1分間の条件で加熱加圧することによって、ポリメリックMDIを硬化させ、木質基材に紙を介して化粧シートを貼り付けると共に表面を強化した建築板を得た。 Thereafter, the wood base material is set between press plates and heated and pressurized under the conditions of 120 ° C., 0.68 MPa (7 kg / cm 2 ) for 1 minute to cure the polymeric MDI, and the paper is passed through the wood base material. A decorative sheet with a decorative sheet and a strengthened surface was obtained.

(実施例2)
ポリメリックMDI(実施例1と同じ)100質量部に対して、離型剤としてポリエチレンワックスエマルジョン(三井化学ポリウレタン株式会社製「コスモネート XRA−600」を3質量部添加して混合することによって、ポリメリックMDIに離型剤を分散させた。
(Example 2)
By adding 3 parts by mass of polyethylene wax emulsion (“Cosmonate XRA-600” manufactured by Mitsui Chemicals Polyurethane Co., Ltd.) as a release agent to 100 parts by mass of polymeric MDI (same as Example 1), polymeric A release agent was dispersed in MDI.

そしてこの離型剤を分散させたポリメリックMDIを用いる他は、実施例1と同様にして、木質基材に紙を介して化粧シートを貼り付けると共に表面を強化した建築板を得た。   Then, except that the polymeric MDI in which the release agent was dispersed was used, a building board having a strengthened surface was obtained in the same manner as in Example 1 by attaching a decorative sheet to the wooden substrate through paper.

(比較例1)
ポリメリックMDIの代わりにSBR接着剤((株)サンベーク製「SBNM591K」)を用いるようにした他は、実施例1と同様にして建築板を得た。
(Comparative Example 1)
A building board was obtained in the same manner as in Example 1 except that an SBR adhesive ("SBNM591K" manufactured by Sunbake Co., Ltd.) was used instead of the polymeric MDI.

(比較例2)
紙を用いず、木質基材のポリメリックMDIを塗布した面に直接、化粧シートを重ねるようにした他は、実施例1と同様にして建築板を得た。
(Comparative Example 2)
A building board was obtained in the same manner as in Example 1 except that a decorative sheet was directly overlapped on the surface of the wood substrate on which polymeric MDI was applied without using paper.

上記のように実施例1〜2及び比較例1〜2で得た建築板を用い、建築板の表面上の同一箇所に、25kgの荷重をかけた直径50mmの金属製キャスターを2000回往復走行させ、その部分に生じる凹み量を測定し、結果を表1に示す。   Using the building board obtained in Examples 1 and 2 and Comparative Examples 1 and 2 as described above, a metal caster having a diameter of 50 mm and a load of 25 kg is reciprocated 2000 times on the same location on the surface of the building board. And the amount of dent generated in that portion was measured, and the results are shown in Table 1.

また、特殊合板の日本農林規格に示される寒熱繰り返しB試験を3回繰り返した後に、建築板の表面に生じるクラックの長さを測定し、その総和をクラック長として表1に示す。   Moreover, after repeating the cold repetition B test shown by the Japanese agricultural and forestry standard of a special plywood 3 times, the length of the crack which arises on the surface of a building board is measured, and the sum total is shown in Table 1 as a crack length.

さらに、実施例1〜2及び比較例2について、それぞれ100枚の建築板を作製する作業を行ない、100枚の建築板のうち加熱加圧の工程でプレス板に付着したものの枚数をカウントし、結果を表1に示す。   Furthermore, for Examples 1 and 2 and Comparative Example 2, the work of producing 100 building boards was performed, and the number of sheets adhered to the press board in the process of heating and pressing among 100 building boards was counted, The results are shown in Table 1.

Figure 2009051102
Figure 2009051102

表1にみられるように、ポリメリックMDIで表面を強化した実施例1,2のものは、SBR接着剤を用いた比較例1よりも耐キャスター性能が高く、表面強度が向上していることが確認される。   As seen in Table 1, those of Examples 1 and 2 whose surfaces were reinforced with polymeric MDI had higher caster resistance performance and improved surface strength than Comparative Example 1 using an SBR adhesive. It is confirmed.

また木質基材に化粧シートを直接貼り付けた比較例1,2では多くのクラックが発生しているが、紙を木質基材と化粧シートの間に積層した実施例1,2のものは、クラックが全く発生しないものであった。   Further, in Comparative Examples 1 and 2 in which the decorative sheet was directly attached to the wooden base material, many cracks occurred, but in Examples 1 and 2 in which paper was laminated between the wooden base material and the decorative sheet, Cracks did not occur at all.

さらに、実施例1〜2及び比較例2の比較にみられるように、紙を用いない比較例2ではプレス板に対する付着が多く発生するのに対して、紙を用いた実施例1では付着を大幅に低減することができ、特に離型剤を分散した実施例2では付着を皆無にすることができるものであった。   Further, as seen in the comparison between Examples 1 and 2 and Comparative Example 2, in Comparative Example 2 in which paper is not used, much adhesion occurs on the press plate, whereas in Example 1 using paper, adhesion is observed. In particular, in Example 2 in which the release agent was dispersed, the adhesion could be completely eliminated.

本発明の実施の形態の一例を示す概略図である。It is the schematic which shows an example of embodiment of this invention.

符号の説明Explanation of symbols

1 木質基材
2 紙
3 化粧シート
4 ポリメリックMDI
1 Wood substrate 2 Paper 3 Makeup sheet 4 Polymeric MDI

Claims (3)

木質基材の表面にポリメリックMDIを主成分とする塗布液を塗布し、木質基材のこの表面に紙を介して化粧シートを重ねた後、加熱加圧して木質基材に化粧シートを貼り付けることを特徴とする建築板の製造方法。   After applying a coating solution mainly composed of polymeric MDI on the surface of the wooden base material, a decorative sheet is stacked on this surface of the wooden base material through paper, and then the decorative sheet is attached to the wooden base material by heating and pressing. The manufacturing method of the building board characterized by the above-mentioned. 塗布液として、ポリメリックMDIを主成分とし、離型剤を分散させたものを用いることを特徴とする請求項1に記載の建築板の製造方法。   2. The method for manufacturing a building board according to claim 1, wherein the coating liquid is composed of polymeric MDI as a main component and a release agent is dispersed. 請求項1又は2に記載の方法で製造されたものであることを特徴とする建築板。   A building board manufactured by the method according to claim 1 or 2.
JP2007220294A 2007-08-27 2007-08-27 Building plate and method for manufacturing building plate Pending JP2009051102A (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010234716A (en) * 2009-03-31 2010-10-21 Victor Co Of Japan Ltd Wooden molded article and manufacturing method therefor
CN102267146A (en) * 2011-08-29 2011-12-07 张春平 Production method of staircase buckling strip
JP2014051832A (en) * 2012-09-07 2014-03-20 Dainippon Printing Co Ltd Decorative material for floor
CN106346567A (en) * 2016-11-18 2017-01-25 南京林业大学 Manufacturing method for outdoor wood-bamboo product

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07256758A (en) * 1994-03-17 1995-10-09 Shoei Kagaku Kogyo Kk Manufacture of decorative board to which fancy veneer is stuck
JPH09267440A (en) * 1996-03-29 1997-10-14 Daiken Trade & Ind Co Ltd Production of wooden veneer overlaid decorative panel

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07256758A (en) * 1994-03-17 1995-10-09 Shoei Kagaku Kogyo Kk Manufacture of decorative board to which fancy veneer is stuck
JPH09267440A (en) * 1996-03-29 1997-10-14 Daiken Trade & Ind Co Ltd Production of wooden veneer overlaid decorative panel

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010234716A (en) * 2009-03-31 2010-10-21 Victor Co Of Japan Ltd Wooden molded article and manufacturing method therefor
CN102267146A (en) * 2011-08-29 2011-12-07 张春平 Production method of staircase buckling strip
JP2014051832A (en) * 2012-09-07 2014-03-20 Dainippon Printing Co Ltd Decorative material for floor
CN106346567A (en) * 2016-11-18 2017-01-25 南京林业大学 Manufacturing method for outdoor wood-bamboo product

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