JPH11114906A - Production of wood container - Google Patents
Production of wood containerInfo
- Publication number
- JPH11114906A JPH11114906A JP29624897A JP29624897A JPH11114906A JP H11114906 A JPH11114906 A JP H11114906A JP 29624897 A JP29624897 A JP 29624897A JP 29624897 A JP29624897 A JP 29624897A JP H11114906 A JPH11114906 A JP H11114906A
- Authority
- JP
- Japan
- Prior art keywords
- laminated
- wood
- container
- veneers
- molding
- 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
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W90/00—Enabling technologies or technologies with a potential or indirect contribution to greenhouse gas [GHG] emissions mitigation
- Y02W90/10—Bio-packaging, e.g. packing containers made from renewable resources or bio-plastics
Landscapes
- Veneer Processing And Manufacture Of Plywood (AREA)
- Containers Having Bodies Formed In One Piece (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、木製容器の製造技
術の分野に属し、特に、天然木を利用した各種トレー等
として用いられるのに好適な木製容器とその製造方法に
関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention belongs to the field of wooden container manufacturing technology, and more particularly to a wooden container suitable for use as various trays utilizing natural wood, and a method for manufacturing the same.
【０００２】[0002]
【従来の技術】天然木を適正に維持管理するためには間
引きを行うことが必要であり、それに伴い間伐材が産出
されるが、その用途は限られている。また、日本国内に
おけるスギ材を中心とした針葉樹林の備蓄量は年々増加
しているにもかかわらず、需要は低迷しているのが現状
である。一方、環境問題が叫ばれている昨今、産業廃棄
物など不燃物の処理に対する将来への不安が募りつつあ
り、スチロール製食品用トレー等の石油化学製品を原料
とした容器の使い捨てによる不燃ゴミの増加が問題にな
っている。そこで、スギなどの木材を容器として新規に
製品開発することができれば、焼却可能なゴミとして各
家庭でも処理でき、有害ガスの発生も起こさず、併せて
上記の天然木の有効利用の問題も解決するものとして期
待される。2. Description of the Related Art In order to properly maintain and manage natural trees, it is necessary to perform thinning, and thinnings are produced with the thinning, but their uses are limited. In addition, despite the increasing stockpile of coniferous forests centered on cedar wood in Japan, demand is currently stagnant. On the other hand, recently, concerns about environmental problems are being raised, and concerns about the future of the treatment of incombustibles such as industrial waste are increasing. The increase is a problem. Therefore, if a new product can be developed using wood such as cedar as a container, it can be treated at home as incinerated garbage, and no harmful gas will be generated. It is expected to do.
【０００３】木質の材料から成るトレー状等の容器は従
来からも幾つか見受けられるが、一体的に成型されたも
のは少なく、薄板状の本体に側壁部を別途止着したり、
あるいは、薄板本体の一部に設けた切り込み部を折り曲
げて側壁部を形成する等の手段により、容器の形状にし
たものが多い。最近、木質単板を成型し容器として加工
する方法も提案されている（特開平９−９９４１２、特
開平８−２５３０１等）が、成型工程が複雑である。[0003] Although some tray-shaped containers made of a woody material have been found in the past, there are few integrally molded ones, and a side wall is separately fixed to a thin plate-shaped main body.
Alternatively, in many cases, the cut-out portion provided in a part of the thin plate body is bent to form a side wall portion, or the like, so as to form a container. Recently, a method of molding a wooden veneer and processing it into a container has also been proposed (JP-A-9-99412, JP-A-8-25301, etc.), but the molding process is complicated.
【０００４】また、これらの従来の木製容器は、いずれ
も、木材の繊維に平行な方向に裂けやすく、横方向にお
いても折り曲げにより容易に割れる欠点を有し、さら
に、時間の経過とともに割れがひどくなることがあり、
その用途は限られている。一体成型するタイプの容器に
おいては、特に湾曲部に当初から割れやささくれが見ら
れることが多く外観上も好ましくない。さらに、これら
の従来技術による木製容器は、防水性の点でも充分でな
く、水分を多量に含む食品用トレー等の用途には適して
いない。[0004] Further, these conventional wooden containers all have the disadvantage that they are easily torn in a direction parallel to the wood fiber, are easily broken by bending even in the lateral direction, and are severely cracked over time. May be
Its use is limited. In the integrally molded type container, cracks and burrs are often seen from the beginning, particularly in the curved portion, which is not preferable in appearance. Further, these conventional wooden containers are not sufficient in terms of waterproofness, and are not suitable for applications such as food trays containing a large amount of water.
【０００５】木質素材の性状改良のためには成型前また
は成型後に合成樹脂を含浸させたりおよび／または合成
樹脂層を接合させることが行われており、このような手
段を採れば、強度や防水性が向上した木製容器を得るこ
とも可能であろうが、製造工程が複雑となり、また、コ
ストがかかるものが多く経済的とは言えず、さらに合成
樹脂の使用により環境上の問題も引き起こすおそれがあ
る。[0005] In order to improve the properties of wood materials, impregnation with a synthetic resin and / or bonding of a synthetic resin layer before or after molding are performed. It would be possible to obtain a wooden container with improved performance, but it would complicate the manufacturing process, be costly, and would not be economical, and the use of synthetic resin could cause environmental problems. There is.
【０００６】さらに、最近、天然素材として竹を用いた
トレーなどの容器も見受けられるようになったが、竹に
比べて強度や加工性の低い木材を用いて実用に供し得る
ようなトレー等を一体的に製造できる技術は知られてい
ない。Further, recently, containers such as trays using bamboo as a natural material have come to be seen, but trays and the like which can be put to practical use using wood having lower strength and workability than bamboo have been found. There is no known technology that can be integrally manufactured.
【０００７】[0007]
【発明が解決しようとする課題】本発明の目的は、強度
や防水性において従来のものより優れ、しかも環境汚染
の問題を起こすことなく使い棄てトレー等としても利用
できるような木製容器を安価に製造できる技術を確立す
ることにある。SUMMARY OF THE INVENTION It is an object of the present invention to provide a wooden container which is superior in strength and waterproofness and which can be used as a tray or the like without causing environmental pollution problems. It is to establish the technology that can be manufactured.
【０００８】[0008]
【課題を解決するための手段】本発明は、上記の目的を
達成するものとして、繊維方向が互いに交差するように
積層した少なくとも２枚の木材スライス単板を含む複数
の木材スライス単板を接着剤で張り合わせた積層板を作
製する工程、該積層板を常温下に冷圧する工程、および
該冷圧後の積層板を高周波をかけて加熱・加圧成型する
工程を含むことを特徴とする木製容器の製造方法を提供
する。本発明の好ましい態様においては、冷圧後の積層
板をシリコーンまたはセロハンのシートで挟持して加熱
・加圧成型を行う。別の好ましい態様として、本発明の
方法は、加熱・加圧成型後に、積層板の表面に防水加工
を施す工程を追有する。さらに、本発明は、上記の方法
によって一体的に製造され、容器本体とその外周の張出
縁とを備えることを特徴とするトレー状木製容器を提供
する。SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a method for bonding a plurality of wood slice veneers including at least two wood slice veneers laminated so that fiber directions intersect each other. A wooden board characterized by comprising a step of producing a laminate bonded with an agent, a step of cold-pressing the laminate at room temperature, and a step of heating and press-molding the cold-pressed laminate by applying high frequency. Provided is a method for manufacturing a container. In a preferred embodiment of the present invention, the laminate after the cold pressing is sandwiched between sheets of silicone or cellophane to perform heating and pressure molding. As another preferred embodiment, the method of the present invention further includes a step of subjecting the surface of the laminate to waterproofing after the molding under heat and pressure. Further, the present invention provides a tray-shaped wooden container which is manufactured integrally by the above-mentioned method and comprises a container main body and a projecting edge on the outer periphery thereof.
【０００９】[0009]
【発明の実施の形態】本発明に従い各種トレー等として
使用される木製容器を製造するには、木材を薄くスライ
スした単板を用い、先ず、複数の木材スライス単板を接
着剤で張り合わせた積層板を作製する。この際、少なく
とも２枚の木材スライス単板を繊維方向（木目）が互い
に交差するように、すなわち、容器の一方の方向を縦方
向、それと直交する方向を横方向とすれば、少なくとも
１枚のスライス単板の繊維方向が縦方向に平行（または
ほぼ平行）であり、別の少なくとも１枚のスライス単板
の繊維方向が横方向に平行（またはほぼ平行）になるよ
うに配置して積層する。図１は、木材スライス単板を縦
方向に２枚、横方向１枚張り合わせて積層板を作成する
場合を例示するものである。積層数は特に限定されるも
のではないが、２〜５枚が好ましく、積層後の板厚は0.
9mm 〜2.0mm が成型に適している。DESCRIPTION OF THE PREFERRED EMBODIMENTS In order to manufacture a wooden container used as various trays or the like according to the present invention, a veneer obtained by thinly slicing wood is used, and first, a plurality of veneer veneers are laminated with an adhesive. Make a board. At this time, at least two pieces of wood slice veneers are arranged so that the fiber direction (grain) crosses each other, that is, if one direction of the container is the vertical direction and the direction orthogonal to it is the horizontal direction, at least one piece The sliced veneers are arranged and laminated so that the fiber direction is parallel (or substantially parallel) in the longitudinal direction, and the fiber direction of at least one other slice veneer is parallel (or substantially parallel) in the horizontal direction. . FIG. 1 illustrates a case where two wood slice veneers are laminated in the vertical direction and one in the horizontal direction to form a laminate. Although the number of laminations is not particularly limited, 2 to 5 sheets are preferable, and the thickness after lamination is 0.1.
9mm to 2.0mm is suitable for molding.
【００１０】使用するスライス単板を構成する木材は、
広葉樹および針葉樹のいずれでもよいが、好ましい例と
しては、スギ、ヒノキ、スプルス、ベイマツ、アカマ
ツ、ブナ、キリ、ファルカータ等が挙げられる。採伐し
た材をそのまま、あるいは、乾燥された材は繊維飽和点
近くまで含水率を高めた後、0.2mm 〜0.7mm に加工し、
加工した後乾燥したもの（人工乾燥、天然乾燥のいずれ
でも構わない。一般に含水率10％〜25％程度のもの）を
用いる。木目は柾目、板目を問わない。スライス単板の
幅および長さは、製造する木製容器の大きさに応じて任
意に選択し得る。The wood constituting the sliced veneer used is
Both hardwoods and conifers may be used, but preferred examples include cedar, hinoki, spruce, bay pine, red pine, beech, drill, falcata and the like. The harvested timber as it is, or the dried timber, after increasing the moisture content to near the fiber saturation point, is processed to 0.2 mm to 0.7 mm,
Processed and dried (either artificial drying or natural drying, generally having a water content of about 10% to 25%) is used. The grain can be either straight grain or board grain. The width and length of the sliced veneer can be arbitrarily selected according to the size of the wooden container to be manufactured.
【００１１】なお、本発明において用いる木材スライス
単板とは、一般的には、樹木の縦方向（伸長方向）に沿
って薄くスライスしたものであり、竹製の容器を製造す
る際に使用されるような竹の円周方向に沿ってスライス
したロータリー単板（「ダイコンのかつら剥き」のよう
なもの）ではない。スギなどの木材を竹と同じようにロ
ータリー単板にしようとすると、材質が脆くて粘りがな
く、また、節が多数あるために、薄く（例えば0.5mm ）
スライスすると割れが生じ易く、現在の技術では少なく
ても２〜３mm程度にしなければならない。しかし、この
厚みでは今度はトレー等の容器を成型するのが難しくな
る。したがって、本発明において用いる木材スライス単
板は縦方向（伸長方向）に沿ってスライスしたものが好
ましく、このような木材スライス単板を用いて下記のよ
うな工程を組み合わせることによりトレー等の木製容器
の一体成型が容易になる。The wood slice veneer used in the present invention is generally a thin slice obtained along the longitudinal direction (extending direction) of a tree, and is used for producing bamboo containers. It is not a rotary veneer sliced along the circumferential direction of bamboo (such as "peeling off radish wigs"). If you try to make cedar or other wood into a rotary veneer in the same way as bamboo, the material is brittle and not sticky, and because it has many nodes, it is thin (for example, 0.5 mm).
Slicing tends to cause cracks, and current technology requires that the thickness be at least about 2-3 mm. However, this thickness makes it difficult to mold a container such as a tray. Therefore, the wood slice veneer used in the present invention is preferably sliced along the longitudinal direction (extending direction). A wooden container such as a tray is obtained by combining the following steps using such a wood slice veneer. Is easy to integrally mold.
【００１２】本発明において積層板作製に用いる接着剤
としては、食品などを載せる容器に適するように接着養
生後有害物質を発生せず、また、使用済みの容器を廃棄
して燃焼させたときに不燃物や有害ガスを発生しないよ
うに、本質的に炭素（Ｃ）、水素（Ｈ）および酸素
（Ｏ）のみから構成され、且つ、後の加工成型が容易と
なるように接着後に弾性を有する接着剤を用いる。この
条件を満たす好ましい接着剤の例としては、変性酢酸ビ
ニル系樹脂、エポキシ樹脂、ポリビニルアルコール樹
脂、グルコマンナン等が挙げられる。これらの接着剤
は、積層した各スライス単板が軽く接着する程度に少量
使用すればよい。In the present invention, the adhesive used for the production of the laminated board does not generate harmful substances after adhesion curing so as to be suitable for a container on which foods and the like are placed, and is used when the used container is discarded and burned. It is essentially composed of only carbon (C), hydrogen (H) and oxygen (O) so as not to generate incombustibles and harmful gases, and has elasticity after bonding so that it can be easily processed later. Use an adhesive. Preferred examples of the adhesive satisfying this condition include a modified vinyl acetate resin, an epoxy resin, a polyvinyl alcohol resin, and glucomannan. These adhesives may be used in such a small amount that the laminated sliced veneers are lightly adhered.
【００１３】本発明の方法においては、以上のようにし
て得られた積層板を常温下に冷圧する。この冷圧処理
は、積層板のスライス単板が互いに仮接着程度の強度を
有するようになるまで５kg/cm2〜10kg/cm2の圧力下に行
う。In the method of the present invention, the laminate thus obtained is cold-pressed at room temperature. The cold pressed process is carried out under a pressure of 5kg / cm 2 ~10kg / cm 2 until a slice veneer laminate will have a temporary bonding an intensity of about one another.
【００１４】冷圧後の積層板は、次に、所望の形状の金
型に入れて加熱・加圧成型するのであるが、従来技術に
関連して前に触れたように、木材は竹のような天然素材
に比べて加工性や強度が低く、そのままでは成型するの
が、極めて困難であり、長時間かけて慎重に行わなけれ
ばならなかった。すなわち、木材には、心材と辺材〔例
えば、スギの場合には赤い部分（心材）と外側の白い部
分（辺材）〕が存在し、また、早材と挽材（年輪のこ
と。冬場の***組織の細胞壁は厚くて濃く、春から秋の
***組織の細胞壁は薄くて淡い）が存在し、さらには、
節があるため、木材は素材として非常に不均一であり、
成長が早く均一な材料である竹に比べて加工は極めて困
難である。加えて、木材は繊維の長さが短く（モウソウ
チクの平均が1.6mm であるのに対し、スギのような針葉
樹に比べて加工性の優れた国産広葉樹でさえ1.1mm 程
度）、加工性が劣る上に、強度も低い。例えば、スギの
引張り強さは約900kg/cm2 （モウソウチクは1800kg/c
m2）、曲げ強さは約650kg/cm2 （モウソウチクは1500kg
/cm2程度）であり、木質素材は金型加工する過程で割れ
や破断が発生しやすい。本発明者は、検討を重ねた結
果、上述のように構成した積層板を冷圧後、高周波をか
けて加熱・加圧成型すると、短時間で割れ等を生じるこ
となく剛性な木製容器を確実に一体成型できることを見
出した。The laminated plate after the cold pressing is then placed in a mold having a desired shape and heated and pressed. As mentioned above in connection with the prior art, the wood is made of bamboo. The workability and strength are lower than those natural materials, and it is extremely difficult to mold as it is, and it has to be performed carefully over a long time. That is, wood has a heartwood and a sapwood (for example, in the case of cedar, a red portion (heartwood) and an outer white portion (sapwood)). The cell wall of the meristem is thick and thick, and the cell wall of the meristem from spring to autumn is thin and pale).
Due to the knots, the wood is very uneven as a material,
Processing is extremely difficult compared to bamboo, which is a fast growing and uniform material. In addition, wood has a short fiber length (the average of Moso bamboo is 1.6 mm, whereas even Japanese hardwoods, which have excellent processability compared to conifers such as cedar), are inferior in processability. Above, the strength is also low. For example, the tensile strength of cedar is about 900 kg / cm 2 (Moso bamboo is 1800 kg / c
m 2 ), bending strength about 650 kg / cm 2 (1500 kg for Moso bamboo)
/ cm 2 ), and wood materials are liable to crack or break in the process of molding. As a result of repeated studies, the present inventor has found that a rigid wooden container can be reliably formed without cracking or the like in a short time when the laminated plate configured as described above is cold-pressed, and then subjected to high-frequency heating and pressure molding. Found that it can be integrally molded.
【００１５】すなわち、本発明においては、積層板を冷
圧後、1)高周波をかけて加熱した後、直ちに通常の熱圧
プレスにより加熱・加圧成型するか、2)高周波プレスに
より加熱・加圧成型するか、または、3)高周波をかけて
加熱した後、直ちに高周波プレスにより加熱・加圧成型
する。特に3)の方式は、全体の成型時間を短くすること
ができる点においてきわめて好ましい。適用する高周波
は、一般に、周波数５〜30MHz のものを用いる。高周波
プレスとしては、金型を高周波により加熱する専用の高
周波プレス装置を用いてもよいが、便宜的に、高周波加
熱装置の発振器を通常の熱圧プレスの金型に連結して使
用することもできる。That is, in the present invention, after the laminate is cold-pressed, 1) heated and pressed by a high-frequency wave, and then immediately heated and pressed by a normal hot-press, or 2) heated and pressed by a high-frequency press. Press molding or 3) Immediately after heating with high frequency, heat and pressure molding by high frequency press. Particularly, the method 3) is very preferable in that the entire molding time can be shortened. The applied high frequency generally uses a frequency of 5 to 30 MHz. As the high-frequency press, a dedicated high-frequency press device for heating the mold with high frequency may be used, but for convenience, an oscillator of the high-frequency heating device may be connected to a normal hot-press press mold and used. it can.
【００１６】かくして、本発明のおける加熱・加圧成型
は、積層板に高周波をかけた後、および／または積層板
に高周波をかけながら、金型の加熱温度を80℃〜 150
℃、好ましくは80℃〜 100℃にし、積層板を挟んだ後、
ゆっくり重ね合わせ、型（雄型および雌型）が整合した
のを確認した後、１kg/cm2〜50kg/cm2、好ましくは１kg
/cm2〜20kg/cm2の圧力下に加圧することによって行わ
れ、これによって、きわめて短時間の操作で、表面がフ
ラット（平滑）で、全体としてリジット（剛性）な木製
容器を得ることができる。このように本発明の加熱・加
圧成型は、短時間で、且つ、80℃〜 150℃、一般的には
80℃〜 100℃という比較的低温において行うことがで
き、また、圧力は１kg/cm2程度の低圧でも成型可能であ
る。これは、高周波処理により木材組織が加熱・活性化
されることにより成型が容易になるとともに、接着後に
弾性を有する接着剤を用いており、これとスライス単板
が複合化することにより、低温、低圧で成型した材料が
リジットになり易くなるためと解される。Thus, the heating and pressure molding in the present invention may be carried out by applying a high frequency to the laminate and / or while applying a high frequency to the laminate, and setting the heating temperature of the mold at 80 ° C. to 150 ° C.
℃, preferably 80 ℃ ~ 100 ℃, after sandwiching the laminate,
After slowly overlapping and confirming that the molds (male and female molds) are aligned, 1 kg / cm 2 to 50 kg / cm 2 , preferably 1 kg / cm 2
/ cm 2 conducted by pressurizing it under a pressure of to 20 kg / cm 2, thereby, in a very short time operation, the surface is flat (smooth), to obtain a wooden container of rigid (stiff) as a whole it can. Thus, the heat and pressure molding of the present invention is performed in a short time, and at 80 ° C. to 150 ° C., generally
It can be carried out at a relatively low temperature of 80 ° C. to 100 ° C., and can be molded at a pressure as low as about 1 kg / cm 2 . This is because the high-frequency treatment heats and activates the wood tissue to facilitate molding, and uses an adhesive that has elasticity after bonding. It is understood that the material molded at low pressure tends to be rigid.
【００１７】本発明が対象とするようなトレー等の木製
容器を加圧成型により製造するに当たっては、従来よ
り、特に容器の底と側壁との境目を形成する湾曲部ない
しは屈曲部に割れやささくれが生じることが問題となっ
ていた。本発明者は、加熱・加圧成型に際して、金型の
滑りをよくする部材で積層板の両側を挟持することによ
りこの問題を解決し割れやささくれのない木製容器が得
られることを見出している。かくして、本発明の方法の
好ましい態様においては、冷却後の積層板をシリコーン
またはセロハンのシートで挟持しながら加熱・加圧成型
を行う。図２は、このような成型の様子を示すものであ
り、積層板１をシリコーンシートまたはセロハンシート
２で挟持しながら、金型の雄型３と雌型４で加圧するこ
とにより所望の木製容器５が成型される。In manufacturing a wooden container such as a tray, which is the object of the present invention, by pressure molding, conventionally, particularly, a curved portion or a bent portion which forms a boundary between the bottom and the side wall of the container is cracked or crushed. Has been a problem. The present inventor has found that a wooden container free of cracks and cracks can be obtained by sandwiching both sides of the laminate with a member that improves the slip of the mold during heat and pressure molding to solve this problem. . Thus, in a preferred embodiment of the method of the present invention, heat and pressure molding is performed while sandwiching the cooled laminate with a sheet of silicone or cellophane. FIG. 2 shows a state of such a molding. A desired wooden container is obtained by pressing the laminated board 1 with the male mold 3 and the female mold 4 while holding the laminate 1 with a silicone sheet or a cellophane sheet 2. 5 is molded.
【００１８】以上の本発明の各工程により製造された木
製容器は、充分な強度を有し折り曲げても割れを生じる
ことはなく、また、通常の木質素材に見られるように吸
湿により復元して変形することもない。さらに、本発明
の木製容器は、驚くべきことに、そのままでも、かなり
の耐水性を有し、１週間〜２週間程度の浸水試験では水
を透過させないことが確認されている。これは、繊維方
向が互いに交差するように木材スライス単板が接着剤を
介して積層された構造に起因するものと理解される。し
たがって、例えば、ファーストフードレストランの食品
用トレー等としては、そのままでも耐水性（防水性）容
器として使用し得る。The wooden container manufactured by the above-described steps of the present invention has sufficient strength, does not crack even when bent, and is restored by moisture absorption as seen in ordinary wooden materials. There is no deformation. Furthermore, surprisingly, it has been confirmed that the wooden container of the present invention has considerable water resistance as it is, and does not allow water to permeate in a water immersion test for about one to two weeks. This is understood to be due to the structure in which the wood slice veneers are laminated via the adhesive such that the fiber directions intersect each other. Therefore, for example, as a food tray of a fast food restaurant, it can be used as it is as a water-resistant (waterproof) container.
【００１９】しかしながら、特に長期間にわたり使用さ
れ、および／または水分との頻繁な接触が予想されるよ
うな用途においては、積層板の表面に防水加工を施して
もよい。この防水加工は、ポリウレタン、ポリプロピレ
ン系ラミネートフィルムのような防水性ないしは撥水性
で、一般に耐熱性を有する材料を塗装するか、またはそ
のような材料のフィルムを圧着することによって行う。
塗装に際しては、塗装後に揮発成分を発散しない塗料を
使用することが好ましい。また、コハク酸系ポリエステ
ルフィルムのような生分解生を有する材料でコーティン
グしてもよい。However, the surface of the laminate may be waterproofed, especially in applications where it is to be used over a long period of time and / or where frequent contact with moisture is expected. This waterproofing is carried out by coating a material having water resistance or water repellency and generally having heat resistance, such as a polyurethane or polypropylene laminate film, or by crimping a film of such a material.
At the time of painting, it is preferable to use a paint that does not emit volatile components after painting. Further, it may be coated with a biodegradable material such as a succinic polyester film.
【００２０】本発明の方法は、特に、図３に示すような
容器本体６とその外周の張出縁７とを備えるトレー状
（浅皿状）木製容器８を一体的に製造するのに適してい
る。本発明によって得られるトレー状容器は、天然木の
木肌の風合いの良さを生かしており、各種トレー、食
器、プレート、文具、事務用品、玩具等の多方面の用途
に使用することができ、また、恒久的（長期間）使用お
よび使い棄て（短期間）使用のいずれにも適用可能であ
る。なお、トレー状容器の平面形状は、一般的には図３
のような矩形（長方形、正方形）であるが、必要に応じ
て、その他の形状（例えば、円形）にすることもでき
る。The method of the present invention is particularly suitable for integrally manufacturing a tray-shaped (shallow dish-shaped) wooden container 8 having a container body 6 as shown in FIG. ing. The tray-shaped container obtained by the present invention makes use of the good texture of natural wood, and can be used for various purposes such as various trays, tableware, plates, stationery, office supplies, toys, and the like. It is applicable to both permanent (long-term) use and disposable (short-term) use. Note that the planar shape of the tray-shaped container is generally the same as that shown in FIG.
(Rectangle, square), but other shapes (for example, a circle) can be used as necessary.
【００２１】[0021]
【実施例】以下に本発明の特徴をさらに明らかにするた
め実施例を示すが、本発明はこれらの実施例によって制
限されるものではない。実施例１ 材厚0.5mm に加工したスギの柾目スライス単板を、変性
酢酸ビニル接着剤（松栄化学株式会社製、ＫＨ1085）を
用いて縦方向に２枚、横方向に１枚交互に張り合わせ、
10分間、５kg/cm2で冷圧した後、得られた積層板を木材
高周波誘電加熱装置（山本ビニター株式会社製、ＲＨ−
３型）を用い、周波数27.1MHz 、高周波出力３kwで７秒
間高周波をかけた。高周波加熱後、この高周波加熱装置
の発振器を熱圧プレスの金型に連結して高周波プレスと
して、金型温度 100℃、金型圧力１kg/cm2、圧縮時間15
秒の条件下で成型を行い、容器本体および張出縁を有す
るトレー状木製容器（長さ25cm×幅16cm×深さ２cm）を
一体的に製造した。成型表面を無処理の状態のまま水を
１週間入れて、底から水が染み出す状態を観察したが、
水を確認することはできなかった。The following examples are provided to further clarify the features of the present invention, but the present invention is not limited to these examples. Example 1 Two straight-grain sliced cedar veneers processed to a material thickness of 0.5 mm were alternately laminated in the vertical direction and one in the horizontal direction using a modified vinyl acetate adhesive (KH1085, manufactured by Shoei Chemical Co., Ltd.).
After cooling at a pressure of 5 kg / cm 2 for 10 minutes, the obtained laminate was subjected to a wood high-frequency dielectric heating device (RH-
(Type 3), a high frequency was applied for 7 seconds at a frequency of 27.1 MHz and a high frequency output of 3 kw. After high-frequency heating, the oscillator of this high-frequency heating device was connected to the mold of the hot press, and as a high-frequency press, the mold temperature was 100 ° C, the mold pressure was 1 kg / cm 2 and the compression time was 15
Molding was performed under the conditions of seconds, and a tray-shaped wooden container (length 25 cm × width 16 cm × depth 2 cm) having a container body and an overhanging edge was integrally manufactured. Water was added for one week with the molding surface untreated, and the state of water seeping out from the bottom was observed.
No water could be identified.
【００２２】実施例２ 材厚0.5mm に加工したスギの柾目スライス単板を、変性
酢酸ビニル接着剤を用いて縦方向に２枚、横方向に１枚
交互に張り合わせ、10分間、５kg/cm2で冷圧した後、実
施例１と同様に高周波加熱を行い、高周波プレスで、金
型温度 100℃、金型圧力１kg/cm2、圧縮時間10秒の条件
下に成型を行ったところ、木製容器本体および張出縁を
製造できた。このとき金型と原材料であるスライス単板
の間に0.5mm 厚のシリコンシートを挟み、成型を行った
ところ割れやささくれが全くなくなり、成型性が向上し
た。 EXAMPLE 2 Two straight grain sliced cedar veneers processed to a thickness of 0.5 mm were alternately laminated vertically and one laterally using a modified vinyl acetate adhesive for 10 minutes at 5 kg / cm. After cooling at 2 , high-frequency heating was performed in the same manner as in Example 1, and molding was performed with a high-frequency press under the conditions of a mold temperature of 100 ° C., a mold pressure of 1 kg / cm 2 , and a compression time of 10 seconds. The wooden container body and overhang can be manufactured. At this time, when a 0.5 mm thick silicon sheet was sandwiched between the mold and the sliced veneer, which was the raw material, and molding was performed, cracks and burrs were completely eliminated, and moldability was improved.
【００２３】実施例３ 材厚0.5mm に加工したスギの柾目スライス単板を、変性
酢酸ビニル接着剤を用いて縦方向に２枚、横方向に１枚
交互に張り合わせ、10分間、５kg/cm2で冷圧した後、実
施例１と同様に高周波加熱を行い、高周波プレスで、金
型温度 100℃、金型圧力１kg/cm2、圧縮時間10秒の条件
下に成型を行ったところ、木製容器本体および張出縁を
製造できた。このとき金型と原材料であるスライス単板
の間にセロハン紙を挟み、成型を行ったところ割れやさ
さくれが全くなくなり、成型性が向上した。 Example 3 Two straight-grain slices of cedar processed to a thickness of 0.5 mm were alternately laminated vertically and one laterally using a modified vinyl acetate adhesive for 10 minutes at 5 kg / cm. After cooling at 2 , high-frequency heating was performed in the same manner as in Example 1, and molding was performed with a high-frequency press under the conditions of a mold temperature of 100 ° C., a mold pressure of 1 kg / cm 2 , and a compression time of 10 seconds. The wooden container body and overhang can be manufactured. At this time, when cellophane paper was sandwiched between a mold and a sliced veneer as a raw material, and molding was performed, cracks and burrs were completely eliminated, and moldability was improved.
【００２４】実施例４ 材厚0.4mm に加工したスギの柾目スライス単板を、変性
酢酸ビニル接着剤を用いて縦方向に２枚、横方向に１枚
交互に張り合わせ、10分間、５kg/cm2で冷圧した後、実
施例１と同様に高周波加熱を行い、高周波プレスで、金
型温度 100℃、金型圧力１kg/cm2、圧縮時間10秒の条件
下成型を行ったところ、木製容器本体および張出縁を製
造できた。この成型品の表面に耐熱フィルム（ポリプロ
ピレン系ラミネートフィルム）を圧着して、防水性を有
する木製容器を得た。 Example 4 Two straight veneer slices of cedar processed to a thickness of 0.4 mm were alternately laminated vertically and one laterally using a modified vinyl acetate adhesive, and 5 kg / cm for 10 minutes. After cooling at 2 , high-frequency heating was performed in the same manner as in Example 1, and molding was performed by a high-frequency press under the conditions of a mold temperature of 100 ° C., a mold pressure of 1 kg / cm 2 , and a compression time of 10 seconds. The container body and overhanging rim could be manufactured. A heat-resistant film (polypropylene-based laminated film) was pressure-bonded to the surface of the molded product to obtain a waterproof wooden container.
【００２５】実施例５ 材厚0.5mm に加工したスギの板目スライス単板を、エポ
キシ接着剤（コニシ株式会社製、サイレックス100 ）を
用いて縦方向に２枚、横方向に１枚交互に張り合わせ、
10分間、５kg/cm2で冷圧した後、実施例１と同様に高周
波加熱を行い、高周波プレスで、金型温度80℃、金型圧
力５kg/cm2、圧縮時間15秒の条件下に成型を行ったとこ
ろ、木製容器本体および張出縁を製造できた。成型品に
耐熱フィルムを圧着させ、防水性を有する木製容器を得
た。 Example 5 Two pieces of cedar sliced veneer processed to a material thickness of 0.5 mm were alternately arranged vertically in two directions and one in the horizontal direction using an epoxy adhesive (Sirenx 100, manufactured by Konishi Co., Ltd.). Lamination,
After cooling at 5 kg / cm 2 for 10 minutes, high-frequency heating was performed in the same manner as in Example 1, and the high-frequency press was performed under the conditions of a mold temperature of 80 ° C., a mold pressure of 5 kg / cm 2 , and a compression time of 15 seconds. As a result of molding, a wooden container body and an overhanging edge could be manufactured. A heat-resistant film was pressure-bonded to the molded product to obtain a waterproof wooden container.
【００２６】実施例６ 材厚0.2mm に加工した米マツの板目スライス単板を、変
性酢酸ビニル接着剤を用いて縦方向に３枚、横方向に２
枚交互に張り合わせ、10分間、５kg/cm2で冷圧した後、
実施例１と同様に高周波加熱を行い、高周波プレスで、
金型温度100 ℃、金型圧力10kg/cm2、圧縮時間８秒の条
件下に成型を行ったところ、木製容器本体および張出縁
を製造できた。成型品をウレタン塗装（九州塗料（株）
製、ウレゴールド5050）を施すことにより防水性を有す
る木製容器を得た。 EXAMPLE 6 Three sliced veneers of rice pine processed to a material thickness of 0.2 mm were three in the vertical direction and two in the horizontal direction using a modified vinyl acetate adhesive.
Sheet alternately laminated, 10 minutes, after cold pressed at 5 kg / cm 2,
High-frequency heating is performed in the same manner as in Example 1,
Molding was performed under the conditions of a mold temperature of 100 ° C., a mold pressure of 10 kg / cm 2 , and a compression time of 8 seconds. As a result, a wooden container body and an overhanging edge could be manufactured. Urethane coating of molded products (Kyushu Paint Co., Ltd.)
And Ure Gold 5050) to obtain a waterproof wooden container.
【００２７】実施例７ 材厚0.6mm に加工したスギの板目スライス単板を真ん中
に、材厚0.2mm に加工した米マツの板目スライス単板上
下表面にして、変性酢酸ビニル接着剤を用いて縦方向に
２枚、横方向に１枚交互に張り合わせ、５分間、５kg/c
m2で冷圧した後、実施例１と同様に高周波加熱を行い、
高周波プレスで、金型温度100 ℃、金型圧力１kg/cm2、
圧縮時間10秒の条件下に成型を行ったところ、木製容器
本体および張出縁を製造できた。成型品に耐熱フィルム
を圧着して、防水性を有する木製容器を得た。 EXAMPLE 7 A modified vinyl acetate adhesive was applied to the middle surface of a cedar sliced veneer processed to a thickness of 0.6 mm and the top and bottom surfaces of a rice pine sliced veneer processed to a thickness of 0.2 mm. Two sheets in the vertical direction and one sheet in the horizontal direction are laminated alternately for 5 minutes, 5 kg / c
After cooling with m 2 , high-frequency heating was performed as in Example 1,
With high frequency press, mold temperature 100 ° C, mold pressure 1kg / cm 2 ,
When molding was performed under the condition of a compression time of 10 seconds, a wooden container body and an overhanging edge could be manufactured. A heat-resistant film was pressure-bonded to the molded product to obtain a waterproof wooden container.
【００２８】実施例８ 材厚0.4mm に加工したスギの柾目スライス単板を、グル
コマンナン（和光純薬（株）製）のゲルを用いて縦方向
に２枚、横方向に１枚交互に張り合わせ、60分間、10kg
/cm2で冷圧した後、実施例１と同様に高周波加熱を行
い、高周波プレスで、金型温度80℃、金型圧力20kg/c
m2、圧縮時間20秒の条件下に成型を行ったところ、木製
容器本体および張出縁を製造できた。成型品を生分解性
を有するフィルム（昭和高分子製、ビオノーレ）でコー
ティングし木製容器を得た。 Example 8 Two pieces of cedar straight grain slices processed to a material thickness of 0.4 mm were alternately arranged in the longitudinal direction and in the transverse direction alternately using a gel of glucomannan (manufactured by Wako Pure Chemical Industries, Ltd.). Laminated, 60 minutes, 10kg
After cooling at a pressure of / cm 2 , high-frequency heating was performed in the same manner as in Example 1, and a high-frequency press was used to mold at a temperature of 80 ° C and a pressure of 20 kg / c
When molding was performed under the conditions of m 2 and a compression time of 20 seconds, a wooden container body and an overhanging edge could be manufactured. The molded product was coated with a biodegradable film (manufactured by Showa Kobunshi, Bionole) to obtain a wooden container.
【００２９】実施例９ 材厚0.5mm に加工したスギの柾目スライス単板を、変性
酢酸ビニル接着剤を用いて縦方向に１枚、横方向に１枚
交互に張り合わせ、10分間、５kg/cm2で冷圧した後、実
施例１と同様に高周波加熱を行い、高周波プレスで、金
型温度100 ℃、金型圧力１kg/cm2、圧縮時間15秒の条件
下に成型を行ったところ、木製容器本体および張出縁を
製造できた。成型品をウレタン塗装を施すことにより防
水性を有する木製容器を得た。 Example 9 Single-grained cedar slices of cedar processed to a material thickness of 0.5 mm were alternately laminated one by one in the vertical direction and one in the horizontal direction by using a modified vinyl acetate adhesive, and 5 kg / cm for 10 minutes. After cooling at 2 , high-frequency heating was performed in the same manner as in Example 1, and molding was performed with a high-frequency press at a mold temperature of 100 ° C., a mold pressure of 1 kg / cm 2 , and a compression time of 15 seconds. The wooden container body and overhang can be manufactured. A wooden container having waterproofness was obtained by applying a urethane coating to the molded product.
【００３０】実施例10 材厚0.7mm に加工したスギの柾目スライス単板を、変性
酢酸ビニル接着剤を用いて縦方向に１枚、横方向に１枚
交互に張り合わせ、10分間、５kg/cm2で冷圧した後、実
施例１と同様に高周波加熱を行い、高周波プレスで、金
型温度100 ℃、金型圧力１kg/cm2、圧縮時間15秒の条件
下に成型を行ったところ、木製容器本体および張出縁を
製造できた。成型品に耐熱フィルムを圧着して、防水性
を有する木製容器を得た。 EXAMPLE 10 One straight grain slice of cedar processed to a thickness of 0.7 mm was alternately laminated one by one in the vertical direction and one in the horizontal direction using a modified vinyl acetate adhesive, and then 5 kg / cm for 10 minutes. After cooling at 2 , high-frequency heating was performed in the same manner as in Example 1, and molding was performed with a high-frequency press at a mold temperature of 100 ° C., a mold pressure of 1 kg / cm 2 , and a compression time of 15 seconds. The wooden container body and overhang can be manufactured. A heat-resistant film was pressure-bonded to the molded product to obtain a waterproof wooden container.
【００３１】[0031]
【発明の効果】本発明に従えば、木材スライス単板の接
着積層工程および金型成型工程から成る簡単な工程によ
り木製容器を製造することができ、したがって、発泡ス
チロール製容器と同等の価格でトレー等の木製容器を提
供することができる。本発明によって得られる木製容器
においては、原材料として木材と少量の可燃性且つ無害
性の接着剤を採択しているので、使用後は焼却、埋没等
によって容易に処分でき、産業廃棄物を減少させる。本
発明によれば、容器本体とその周囲の張出縁とを備える
トレー状木製容器を一体的に製造することができ、得ら
れる木製容器は、充分な強度と形状保持性を有し、さら
に、表面処理を施さない場合においても高い防水性を有
する。According to the present invention, a wooden container can be manufactured by a simple process including a bonding and laminating process of a wood slice veneer and a die forming process. Therefore, a tray can be manufactured at a price equivalent to that of a styrene foam container. Etc. can be provided. In the wooden container obtained by the present invention, since wood and a small amount of flammable and harmless adhesive are adopted as raw materials, after use, it can be easily disposed of by incineration, burial, etc., thereby reducing industrial waste. . ADVANTAGE OF THE INVENTION According to this invention, the tray-shaped wooden container provided with the container main body and the surrounding rim can be integrally manufactured, The obtained wooden container has sufficient intensity | strength and shape retention, Furthermore, It has high waterproofness even when no surface treatment is applied.
【図１】本発明に従い繊維方向が互いに交差するように
木材スライス単板を張り合わせて積層板を作製する様子
を示すものである。FIG. 1 is a view showing a state in which a laminated board is manufactured by bonding wood slice veneers so that fiber directions cross each other according to the present invention.
【図２】本発明に従い積層板を加圧成型する様子を示す
ものである。FIG. 2 is a view showing a state in which a laminate is subjected to pressure molding according to the present invention.
【図３】本発明のトレー状木製容器の典型例を示すもの
である。FIG. 3 shows a typical example of a tray-shaped wooden container of the present invention.
６ 容器本体 ７ 張出縁 ８ トレー状木製容器 6 Container body 7 Overhanging edge 8 Tray-shaped wooden container
───────────────────────────────────────────────────── フロントページの続き (72)発明者 朝倉 良平 福岡県久留米市津福本町1627−１ひまわり コーポ214 (72)発明者 花田 賀津男 福岡県福岡市博多区博多駅南１丁目13−13 フクパ株式会社内 ──────────────────────────────────────────────────続 き Continued on the front page (72) Ryohei Asakura, 1627-1 Tsufukuhoncho, Kurume-shi, Fukuoka Prefecture Sunflower Corp. 214 (72) Kazuo Hanada 1-13-13, Hakata-eki Minami, Hakata-ku, Fukuoka-shi, Fukuoka Fukupa Co., Ltd. Inside
Claims (4)
た少なくとも２枚の木材スライス単板を含む複数の木材
スライス単板を接着剤で張り合わせた積層板を作製する
工程、該積層板を常温下に冷圧する工程、および該冷圧
後の積層板を高周波をかけて加熱・加圧成型する工程を
含むことを特徴とする木製容器の製造方法。1. A step of producing a laminated board in which a plurality of wood slice veneers including at least two wood slice veneers laminated so that their fiber directions intersect each other with an adhesive, and the laminated board is subjected to room temperature. A method for producing a wooden container, comprising: a step of cold-pressing the laminate; and a step of heating and press-molding the laminated plate after the cold-pressing by applying a high frequency.
ハンのシートで挟持して加熱・加圧成型を行うことを特
徴とする請求項１の木製容器の製造方法。2. The method for producing a wooden container according to claim 1, wherein the laminated plate after the cold pressing is sandwiched between sheets of silicone or cellophane to perform heating and pressure molding.
水加工を施す工程を追有することを特徴とする請求項１
または請求項２の木製容器の製造方法。3. The method according to claim 1, further comprising a step of subjecting the surface of the laminate to waterproofing after the heating and pressure molding.
Alternatively, the method for producing a wooden container according to claim 2.
一体的に製造され、容器本体とその外周の張出縁とを備
えることを特徴とするトレー状木製容器。4. A tray-shaped wooden container integrally produced by the method according to claim 1, comprising a container main body and a projecting edge on an outer periphery thereof.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29624897A JPH11114906A (en) | 1997-10-14 | 1997-10-14 | Production of wood container |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29624897A JPH11114906A (en) | 1997-10-14 | 1997-10-14 | Production of wood container |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH11114906A true JPH11114906A (en) | 1999-04-27 |
Family
ID=17831117
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP29624897A Pending JPH11114906A (en) | 1997-10-14 | 1997-10-14 | Production of wood container |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH11114906A (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003103911A1 (en) * | 2002-06-11 | 2003-12-18 | 株式会社合電 | Deep wooden container and production method therefor |
| EP1438914A1 (en) * | 2003-01-15 | 2004-07-21 | Franz Hess | Disposable servingware |
| KR100473637B1 (en) * | 2000-06-15 | 2005-03-08 | 최금주 | Tray consisted of polyurethane and veneer board and the same producing method |
| WO2006109824A1 (en) * | 2005-04-12 | 2006-10-19 | Qurz Inc. | Method for producing laminated wood and method for producing bag |
| CN102218759A (en) * | 2011-06-07 | 2011-10-19 | 戴武兵 | Method for manufacturing plywood |
| CN103419252A (en) * | 2012-05-18 | 2013-12-04 | 新会中集木业有限公司 | Composite floor for container soleplate |
| CN103600400A (en) * | 2013-11-25 | 2014-02-26 | 南京林业大学 | Bamboo and wood composited electrical laminated wood |
| CN105313192A (en) * | 2014-06-21 | 2016-02-10 | 刘朝阳 | Artificial wooden multilayer glued die-pressed door sheet and manufacturing process thereof |
| KR20230000287A (en) * | 2021-06-24 | 2023-01-02 | 심상롱 | Tunnel type fomentation device manufacture method and tunnel type fomentation device manufactured by this same |
-
1997
- 1997-10-14 JP JP29624897A patent/JPH11114906A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100473637B1 (en) * | 2000-06-15 | 2005-03-08 | 최금주 | Tray consisted of polyurethane and veneer board and the same producing method |
| WO2003103911A1 (en) * | 2002-06-11 | 2003-12-18 | 株式会社合電 | Deep wooden container and production method therefor |
| EP1438914A1 (en) * | 2003-01-15 | 2004-07-21 | Franz Hess | Disposable servingware |
| WO2006109824A1 (en) * | 2005-04-12 | 2006-10-19 | Qurz Inc. | Method for producing laminated wood and method for producing bag |
| CN102218759A (en) * | 2011-06-07 | 2011-10-19 | 戴武兵 | Method for manufacturing plywood |
| CN103419252A (en) * | 2012-05-18 | 2013-12-04 | 新会中集木业有限公司 | Composite floor for container soleplate |
| CN103600400A (en) * | 2013-11-25 | 2014-02-26 | 南京林业大学 | Bamboo and wood composited electrical laminated wood |
| CN105313192A (en) * | 2014-06-21 | 2016-02-10 | 刘朝阳 | Artificial wooden multilayer glued die-pressed door sheet and manufacturing process thereof |
| KR20230000287A (en) * | 2021-06-24 | 2023-01-02 | 심상롱 | Tunnel type fomentation device manufacture method and tunnel type fomentation device manufactured by this same |
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