JPH05177752A - Manufacture of foam plastic corrugated core fiberboard - Google Patents
Manufacture of foam plastic corrugated core fiberboardInfo
- Publication number
- JPH05177752A JPH05177752A JP4161673A JP16167392A JPH05177752A JP H05177752 A JPH05177752 A JP H05177752A JP 4161673 A JP4161673 A JP 4161673A JP 16167392 A JP16167392 A JP 16167392A JP H05177752 A JPH05177752 A JP H05177752A
- Authority
- JP
- Japan
- Prior art keywords
- corrugated
- temperature
- foamed plastic
- plastic sheet
- rolls
- 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.)
- Granted
Links
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は軽量で断熱性に優れた包
装凾用段ボールの製造方法に関するものである。更に詳
しくは波型中芯が発泡プラスチックシートより成ってお
るもの、発泡プラスチックを主成分とし若干の繊維，充
填材等を混入したもの、または更に該発泡プラスチック
シートの何れか一方の面または両面にプラスチックフィ
ルムが積層されていることを特徴とする耐水強度の大き
い断熱性段ボールの製造方法に係るものであり、更に本
発明は花卉や生鮮食品類の鮮度を保持しながら且つ保冷
性を必要とするもの、または擦傷防止性及び緩衝性を要
求する包装函に使用する断熱性段ボールの製造方法に関
するものである。更に建材，工業製品など結露防止効果
を利用する方面にも応用出来る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of manufacturing a cardboard for packaging which is lightweight and has excellent heat insulating properties. More specifically, the corrugated core is made of a foamed plastic sheet, a foamed plastic as a main component with some fibers, fillers, or the like, or one or both sides of the foamed plastic sheet. The present invention relates to a method for producing a heat-insulating corrugated cardboard having high water resistance, which is characterized in that a plastic film is laminated, and the present invention requires coolness while maintaining the freshness of flowers and fresh foods. The present invention relates to a method for producing a heat-insulating corrugated board used for a packaging box that requires scratch resistance and cushioning. Furthermore, it can be applied to areas such as building materials and industrial products that utilize the dew condensation prevention effect.
【０００２】[0002]
【従来の技術】従来、高度な断熱性を要求される分野に
於いては発泡ポリスチレン樹脂製の射出成型された函が
用いられている。この物は断熱性の点では優れている
が、函の形状，寸法を異にする毎に別個の型枠を準備す
る必要があり、この型枠製作のコストが高価なため大量
生産の場合以外には適用不可能であった。また発泡ポリ
スチレン樹脂製函は容器自体の厚みが大きく且つ折畳む
ことが出来ないため運搬・貯蔵・保管時に於ける所要容
積が大きくなる欠点を有していた。また函内へ内容物を
詰めた場合に函材自体の強度不足に基因して積重ねた下
積の函が破損，変形，滑落するなどの欠点があった。2. Description of the Related Art Conventionally, an injection-molded box made of expanded polystyrene resin has been used in a field requiring a high degree of heat insulation. This product is excellent in terms of heat insulation, but it is necessary to prepare a separate mold for each different shape and size of the box, and the cost of manufacturing this mold is expensive, so except for mass production. Was not applicable to. Further, the expanded polystyrene resin box has a drawback that the container itself has a large thickness and cannot be folded, so that the volume required for transportation, storage and storage becomes large. In addition, when the contents were packed in the box, there was a drawback that the stacked lower boxes were damaged, deformed, or slipped due to insufficient strength of the box material itself.
【０００３】一方、従来の段ボール函は内容物を収納す
る場所までは折り畳んでシート状で運搬することが可能
であり所要容積も小さいという長所を有してはいるが、
断熱性の点で充分とは言い得ない。また最近、段ボール
の表裏ライナーの何れか一方のライナーの外面側若しく
は内面側にプラスチックのフォームシートを積層した段
ボールが提案されているが、断熱性，耐水強度，吸湿性
などの点に於いて未だ充分満足し得る程度には達してい
ないことと印刷性が悪いなどの欠点を有しているのが現
状である。また生鮮食品類や花卉などの鮮度保持保冷性
を兼ね備えた容器は未だ開発されていないのが現状であ
る。On the other hand, the conventional corrugated cardboard box has an advantage that it can be folded and transported in a sheet shape to a place where contents are stored and a required volume is small.
It cannot be said to be sufficient in terms of heat insulation. Recently, a corrugated cardboard in which a plastic foam sheet is laminated on the outer or inner surface of either one of the front and back liners of corrugated cardboard has been proposed, but it is still unsatisfactory in terms of heat insulation, water resistance, moisture absorption, etc. At present, there are drawbacks such as not being sufficiently satisfactory and poor printability. In addition, a container having freshness-keeping and cold-keeping properties such as fresh foods and flowers has not yet been developed.
【０００４】[0004]
【発明が解決しようとする課題】本発明は上記した従来
技術に於ける欠点を解消し、所要容積が小さく軽量で、
形状・寸法の変動に対応する事が簡単で、運搬・貯蔵・
保管時にシート状にして積み重ねが容易であり、且つ使
用時に簡単に所要形状に組立てが可能であり、しかも断
熱性，耐水強度，吸湿性などが従来の段ボール凾に比し
格段に優れた断熱性段ボール凾、或いは生鮮食品類や花
卉などの鮮度保持保冷性が従来の段ボール函に比し優れ
た性能を有する包装函を造るための鮮度保持保冷用段ボ
ールと、更に耐水強度が大きいもの、或いは適当な透湿
性を有し且つ包装凾内部の湿度調節効果を具備している
段ボールの製造方法を提供することを課題とするもので
ある。DISCLOSURE OF THE INVENTION The present invention solves the above-mentioned drawbacks of the prior art, requires a small volume and is lightweight,
It is easy to handle variations in shape and size, and transport, store,
It can be easily put into a sheet for storage and stacked, and can be easily assembled into the required shape during use. Moreover, its heat insulation, water resistance, and moisture absorption are far superior to conventional corrugated boards. Corrugated cardboard or corrugated cardboard for keeping freshness and coldness for making packaging boxes with freshness preservation and cold preservation properties such as fresh foods and flowers that are superior to conventional cardboard boxes, and those with greater water resistance, or suitable It is an object of the present invention to provide a method for producing corrugated cardboard having excellent moisture permeability and an effect of controlling the humidity inside the packaging.
【０００５】[0005]
【課題を解決するための手段】本発明者は上記課題を解
決すべく鋭意研究の結果、従来の段ボールに於ける波型
中芯に特定のスキン層を設けた独立気泡率70％以上の発
泡プラスチックシートを用いることにより、更に該発泡
プラスチックシートの何れか一方の面または両面にプラ
スチックフィルム積層することにより、軽量でしかも格
段に断熱性に優れ、しかも耐水強度が著しく向上し且つ
鮮度保持保冷性の優れた包装函用段ボールを製出し得る
こと、更に保冷性の一層の向上を期待する場合には波型
中芯の溝部に遮断堰を設けて段ボール内の空気の移動を
防止することによって保冷性の一層の向上を図ったもの
である。勿論、波型中芯にスキン層を有しない発泡プラ
スチックシートを用いた場合も断熱効果は減少するが、
使用することは可能である。Means for Solving the Problems As a result of intensive research to solve the above problems, the present inventor has found that a corrugated core of a conventional corrugated board provided with a specific skin layer has a closed cell rate of 70% or more. By using a plastic sheet, and by laminating a plastic film on either or both sides of the foamed plastic sheet, it is lightweight and has significantly excellent heat insulation properties, and the water resistance is significantly improved and the freshness retention and cold retention properties are improved. In order to be able to produce an excellent cardboard box for packaging boxes and to further improve the cold insulation, a cooling dam is provided in the groove of the corrugated core to prevent the movement of air inside the cardboard. It is intended to further improve the sex. Of course, when a foamed plastic sheet that does not have a skin layer on the corrugated core is used, the heat insulating effect also decreases,
It is possible to use.
【０００６】更に之等の保冷性段ボールの片側の面に発
泡プラスチックシートを積層することによって包装函に
収容した場合の内容物に対して保冷性を向上させると共
に擦傷防止効果及び緩衝性を併せ付与せしめることも出
来ることを究明して本発明に係る鮮度保持保冷用段ボー
ルの製造方法の開発に成功したものである。また波型中
芯の何れか一方の面または両面にプラスチックフィルム
を積層することによって断熱性を更に向上させると共に
通気性を遮断し、圧縮強度の向上を図ったのである。Further, by laminating a foamed plastic sheet on one surface of a cold-insulating cardboard as described above, the cold-insulating property is improved and the scratch-preventing effect and the cushioning property are given to the contents when stored in a packaging box. The present inventors have succeeded in developing the method for producing a cardboard for keeping freshness and keeping cold according to the present invention by investigating that it can be pressed. Further, by laminating a plastic film on either or both surfaces of the corrugated core, the heat insulating property is further improved, the air permeability is blocked, and the compressive strength is improved.
【０００７】本発明は本発明者が先きに発明した特願平
3-110693号の製造方法の改良に関するものである。従っ
て得られる製品の特徴，効果等は総べて先願に記載の通
りである。本発明によって発泡プラスチック波型中芯の
成型を正確に且つ効率的にしたものである。即ち発泡プ
ラスチックシートが比較的高温時に型付けし、比較的低
温時に形状の固定をさせるのであって、樹脂シートより
10℃低い温度範囲内の高温時にはシートが垂れ下がった
り、型付けが旨く行かない。The present invention is a patent application that the present inventor previously invented.
It relates to improvement of the manufacturing method of 3-110693. Therefore, the features and effects of the obtained product are all as described in the prior application. According to the present invention, the molding of the foamed plastic corrugated core is made accurate and efficient. That is, the foamed plastic sheet is molded at a relatively high temperature, and the shape is fixed at a relatively low temperature.
At high temperatures within the low temperature range of 10 ℃, the sheet hangs down and the patterning does not work well.
【０００８】また樹脂シートより90℃以上低い温度に迄
低温にした場合には収縮が大き過ぎて型状が不正確にな
ったり亀裂を生じたりする。之等の欠点の解決策として
複数段式若しくは徐冷式により徐々に順次冷却すること
によって成功したものである。例えば140〜80℃，100〜
60℃，80〜40℃の様な３ゾーンに区別すると良い。Further, when the temperature is lowered to a temperature lower than the resin sheet by 90 ° C. or more, the shrinkage becomes too large and the shape of the mold becomes inaccurate or cracks occur. As a solution to these drawbacks, it has succeeded by gradually cooling in multiple stages or by slow cooling. For example, 140-80 ℃, 100-
It is good to distinguish into 3 zones such as 60 ℃ and 80-40 ℃.
【０００９】次ぎに本発明品の製造方法に就いて説明す
る。即ち第１の方法として一次発泡その他の方法で不完
全発泡させたプラスチックシートを使用し、その発泡プ
ラスチックシートを発泡機中に於いて変形温度ないし変
形温度＋60℃の範囲に種々の方法で加熱することにより
二次発泡を行なわせた後、引続き該発泡プラスチックシ
ートの少なく共一方の面を該シートの表面温度より低い
温度の複数段式ロールと接触せしめるか、若しくは順次
温度を下げた気体を吹き付けるかしてスキン層を形成せ
しめて後、加熱により発泡せしめたときの樹脂温度より
10〜90℃低い温度範囲で複数段で徐々に温度を降下せし
めた一対の噛み合う歯車型状凹凸冷却ロール若しくは一
対のカタピラ式型付機により連続または非連続に波型加
工を行なわせ、次いで冷却後、該波型発泡プラスチック
シート両面の波型頂部に接着材を塗布し、２本のロール
間を両面に板紙ライナーを重ね合わせて圧接させて積層
した後、乾燥させた。この場合に用いる歯車型状凹凸冷
却ロールにプラスチックシートが付着する恐れがある場
合には該ロールのプラスチックシートと接触する部分に
フツ素樹脂を塗布しておくとよい。スキン層を形成せし
めるにはプラスチックシートが加熱された状態にある時
点、即ち二次発泡せしめた時点若しくはその直後に該シ
ートより低い温度（例えば30〜80℃低い温度）のロール
と接触せしめるか若しくは低温度の気体を吹き付けるこ
とにより得られる。勿論波型中芯にスキン層を有しない
発泡プラスチックシートを用いた場合は効果は減少する
が、使用することは可能である。Next, a method for producing the product of the present invention will be described. That is, as the first method, a plastic sheet which has been incompletely foamed by primary foaming or another method is used, and the foamed plastic sheet is heated in a foaming machine by various methods within a range of deformation temperature or deformation temperature + 60 ° C. After the secondary foaming has been performed, at least one side of the foamed plastic sheet is subsequently brought into contact with a multi-stage roll having a temperature lower than the surface temperature of the sheet, or a gas whose temperature is sequentially lowered is blown. After the skin layer has been formed, the temperature of the resin when foamed by heating
10 ~ 90 ℃ The temperature is gradually reduced in multiple stages, the temperature is gradually reduced in multiple stages. A pair of meshing gear-shaped concavo-convex cooling rolls or a pair of caterpillar-type machines are used to perform continuous or discontinuous corrugation, followed by cooling. After that, an adhesive was applied to the corrugated tops on both sides of the corrugated foamed plastic sheet, and a paperboard liner was superposed on both surfaces between two rolls by pressure and laminated, and then dried. If the plastic sheet may be attached to the gear-shaped concavo-convex cooling roll used in this case, it is advisable to apply fluorine resin to the portion of the roll that comes into contact with the plastic sheet. In order to form the skin layer, the plastic sheet is contacted with a roll having a lower temperature (for example, 30 to 80 ° C. lower temperature) than the sheet at the time of being heated, that is, at the time of the secondary foaming or immediately thereafter. Obtained by blowing a low temperature gas. Of course, when a foamed plastic sheet having no skin layer on the corrugated core is used, the effect is reduced, but it can be used.
【００１０】本発明に於いて徐冷することを特徴とした
意義は急冷によって発泡プラスチックシートに亀裂を生
じさせたり変形したりすることを防止するためであり、
その点に特徴が存しているのである。次いで必要あれば
所定寸法に裁断する発泡プラスチック波型中芯段ボール
の製造方法、また第２の方法として一次発泡その他の方
法で不完全発泡させたプラスチックシートを垂直方向に
置かれた加熱器中へ上方より下方へ通過せしめてプラス
チックシートを通常一般に行なわれているあらゆる方法
で加熱して該プラスチックシートを変形温度ないし変形
温度＋60℃の範囲に加熱することにより二次発泡させた
後、引続きプラスチックシートの少なく共一方の面を該
シートの表面温度より低い温度のロールと接触せしめる
か若しくは低温度の気体を吹き付けるかしてスキン層を
形成せしめて後、加熱により発泡せしめたときの樹脂温
度より10〜90℃低い温度範囲内で複数段で徐々に温度を
降下せしめた噛み合う如く所定間隔を置いて対峠せしめ
た対向する歯車形状凹凸冷却ロール若しくは対向するカ
タピラ式型付機間を上記スキン層形成済プラスチックシ
ートを連続または断続的に通過せしめ且つこの部分にて
プラスチックシートの進行方向を垂直から水平に変換せ
しめ、次いで徐々に常温付近迄冷却後、該波型発泡プラ
スチックシート両面の波型頂部に接着材を塗布し、２本
のロール間を両面に板紙ライナーを重ね合わせて僅かに
圧接せしめて積層した後、乾燥した。尚上記スキン層形
成用ロールの回転周速度を被加工シートの走行速度の1.
2倍前後にすることは一層好ましいスキン層形成効果が
得られる。In the present invention, the significance of the feature of slow cooling is to prevent cracking or deformation of the foamed plastic sheet due to rapid cooling,
The point is that there is a feature. Then, if necessary, a method of manufacturing a foamed plastic corrugated corrugated cardboard that is cut into a predetermined size, and as a second method, a plastic sheet that has been incompletely foamed by primary foaming or another method is placed in a heater placed vertically. After passing through the plastic sheet from the upper side to the lower side and heating the plastic sheet by any of the generally used methods to heat the plastic sheet to a deformation temperature or a deformation temperature of + 60 ° C. for secondary foaming, and then the plastic sheet is continued. And at least one surface of the sheet is brought into contact with a roll having a temperature lower than the surface temperature of the sheet, or a low-temperature gas is blown to form a skin layer, and then the temperature of the resin is 10% higher than the resin temperature when foamed by heating. The temperature was gradually lowered in multiple stages within a low temperature range of ~ 90 ° C. Continuously or intermittently pass the plastic sheet on which the skin layer has been formed between the facing gear-shaped concavo-convex cooling rolls or between the machines facing the caterpillar type die, and at this portion, the traveling direction of the plastic sheet is converted from vertical to horizontal, Then, after gradually cooling to around room temperature, an adhesive is applied to the corrugated tops on both sides of the corrugated foamed plastic sheet, and a paperboard liner is superposed on both surfaces between the two rolls and slightly pressure-bonded to form a laminate. Dried. It should be noted that the rotational peripheral speed of the skin layer forming roll is set to 1.
If the amount is doubled, a more preferable skin layer forming effect can be obtained.
【００１１】次いで必要に応じて所定寸法に裁断・成形
する発泡プラスチック波型中芯段ボールの製造方法を開
発し、更に一対の歯車型状凹凸ロールの雌型凹部に細孔
を設け雄型ロールと噛み合う部分の内部を真空吸引する
如くした鮮度保持保冷用段ボールの製造方法や一対の歯
車型状凹凸ロールの雄型凸部に細孔を設け雌型ロールと
噛み合う部分周の内部に圧縮空気を吹き入れ、上記細孔
から噴射する如くした断熱性段ボールの製造方法の如く
改良案を発明した。なお波型中芯の表面にプラスチック
フィルムをラミネートさせたものを造る場合には一次発
泡プラスチックシートを凹凸冷却ロールで波型加工を行
なう直前の部分でプラスチックフィルムを発泡プラスチ
ックシートの少なく共一方の面に重ね合わせる工程を付
加するか、または一次発泡プラスチックシートに予めプ
ラスチックフィルムをラミネートさせたものを用いると
よい。Next, a method for producing a foamed plastic corrugated corrugated corrugated board which is cut and molded into a predetermined size as needed is developed, and a pair of gear-shaped concavo-convex rolls are provided with pores in the female concaves to form male rolls. A method for producing a freshness-keeping cold-corrugated cardboard in which the inside of the meshing part is vacuum-sucked or a hole is provided in the male convex part of a pair of gear-shaped concavo-convex rolls, and compressed air is blown inside the part that meshes with the female roll. Then, an improvement plan was invented as a method for producing a heat-insulating corrugated cardboard by injecting from the above pores. When a plastic film is laminated on the surface of a corrugated core, the plastic film should be used on the one side of the primary foamed plastic sheet immediately before the corrugation process is performed with the uneven cooling roll. It is advisable to add a step of superimposing the same to the above, or to use a sheet obtained by previously laminating a plastic film on the primary foamed plastic sheet.
【００１２】プラスチックフィルムとしてはポリエステ
ル，ポリエチレン，ポリスチレン，ポリプロピレン，ポ
リアミド，ナイロン，ポリビニルアルコール，塩化ビニ
ル，塩化ビニリデン，その他総べての種類のものが使用
可能である。また繊維その他充填材を混入したものも使
用可能である。プラスチックフィルムを積層することに
よって、波型中芯を表裏両面のライナーと接着させる際
の圧着により段潰れを生じるのを顕著に改善出来る。こ
の場合のプラスチックフィルムの厚さは５〜50μmであ
る場合が最も好適で、５μm未満では加工時に皺になっ
たり破断したりするので加工上に問題があるだけでな
く、圧縮強度の向上が少ない。また50μmを超えた厚い
ものを用いると圧縮強度は向上するが価格が高くなるの
で経済的観点から50μm迄が望ましい。As the plastic film, polyester, polyethylene, polystyrene, polypropylene, polyamide, nylon, polyvinyl alcohol, vinyl chloride, vinylidene chloride, and all other types can be used. Further, it is also possible to use a mixture of fibers and other fillers. By laminating the plastic film, it is possible to remarkably reduce step collapse due to pressure bonding when the corrugated core is adhered to the liners on both front and back surfaces. In this case, the thickness of the plastic film is most preferably 5 to 50 μm, and if it is less than 5 μm, it will be wrinkled or broken during processing, so that there is no problem in processing and little improvement in compressive strength. .. If a thicker layer exceeding 50 μm is used, the compressive strength will be improved, but the cost will be higher.
【００１３】また一対の歯車型状凹凸ロールの雌型凹部
に細孔を設け雄型ロールと噛み合う部分の内部を真空吸
引する如くした発泡プラスチック波型中芯段ボールの製
造方法、または一対の歯車型状凹凸ロールの雄型凹凸部
に細孔を設け雌型ロールと噛み合う部分周辺の内部に圧
縮空気を吹き入れ、上記細孔から噴射する如くした発泡
プラスチック波型中芯段ボールの製造方法を用いること
により製造工程のスピードアップ及び波型形状の正確化
を図ることができる。なお波型中芯の溝部に遮断堰を設
ける場合には凹凸冷却ロールに該形状を付与しておくと
良い。また更に最後に両面ライナー板紙の少なく共一方
の面に発泡プラスチックシートを積層せしめる工程を付
加した発泡プラスチック波型中芯段ボールの製造方法を
用い得る。A method for producing a foamed plastic corrugated corrugated corrugated board in which fine holes are provided in the female concave portions of the pair of gear-shaped concavo-convex rolls so that the inside of the portion meshing with the male roll is vacuumed, or a pair of gear-shaped corrugated rolls Using a manufacturing method of a foamed plastic corrugated corrugated cardboard in which compressed air is blown into the vicinity of the portion that meshes with the female roll by providing pores in the male concave and convex portion of the corrugated roll This makes it possible to speed up the manufacturing process and improve the accuracy of the corrugated shape. When a blocking weir is provided in the groove portion of the corrugated core, it is preferable to give the uneven cooling roll the shape. Furthermore, at the end, a method for producing a foamed plastic corrugated corrugated corrugated board can be used in which a step of laminating a foamed plastic sheet on one side of the double-sided liner paperboard is added.
【００１４】[0014]
実施例１ 次ぎに図を用いて第１の方法に就いて詳説する。図１に
於いて予め発泡倍率８〜10倍に一次発泡せしめた二次発
泡前の不完全発泡ポリスチレンシート１のロールより不
完全発泡ポリスチレンシート１を、送り込みロール２，
２′により発泡機３中に送り込み、不完全発泡ポリスチ
レンシート１を発泡機３中で加熱して不完全発泡ポリス
チレンシート１の樹脂温度を平均約120℃にすることに
より二次発泡を行なわせた後、該発泡ポリスチレンシー
ト１′の少なく共一方の表面部をシートの表面温度より
約35〜40℃低い温度範囲内で複数段式に温度を下げたロ
ール４，４′に接触せしめて該シートの表層部にスキン
層を形成せしめて後、徐々に温度を降下せしめた歯車状
に凹凸にした相対向する歯車形状冷却ロール群５1，
５1′，５2，５2′，５3，５3′間を発泡材厚さよりも
0.1〜２mm前後大きいクリアランスとした間を通過させ
ることにより波形加工を行なわせると共に更にスキン層
を増大させ、次いで送風機６，６′の間を通過させて発
泡済ポリスチレンシート１′の両面を大約40℃付近迄冷
却させて波型中芯７を製造する。この場合の樹脂温度は
平均約120℃であり、歯車型状冷却ロールの温度は第１
段（５1，５1′）は100〜105℃，第２段（５2，５2′）
は約70℃，第３段（５3，５3′）は40℃位とした。Example 1 Next, the first method will be described in detail with reference to the drawings. In FIG. 1, the incompletely expanded polystyrene sheet 1 is fed from the roll of the incompletely expanded polystyrene sheet 1 before the secondary expansion, which is first expanded at an expansion ratio of 8 to 10 times, and is fed into the roll 2.
2'is fed into the foaming machine 3 and the incompletely expanded polystyrene sheet 1 is heated in the foaming machine 3 to make the resin temperature of the incompletely expanded polystyrene sheet 1 about 120 ° C. on average to cause secondary foaming. Then, at least one of the surface portions of the expanded polystyrene sheet 1'is brought into contact with the rolls 4 and 4'where the temperature is lowered in multiple stages within a temperature range lower than the surface temperature of the sheet by about 35 to 40 ° C. After a skin layer is formed on the surface layer of the above, the temperature is gradually decreased, and the gear-shaped cooling roll groups 5 1 are formed to have a concavo-convex shape like a gear.
The distance between 5 1 ′, 5 2 , 5 2 ′, 5 3 and 5 3 ′ is less than the thickness of the foam material.
Corrugation is performed by passing through a clearance with a large clearance of about 0.1 to 2 mm, and the skin layer is further increased, and then it is passed between the blowers 6 and 6 ', and both sides of the expanded polystyrene sheet 1'are approximately 40 The corrugated core 7 is manufactured by cooling to around 0 ° C. The resin temperature in this case is about 120 ° C on average, and the temperature of the gear-shaped cooling roll is the first
Stages (5 1 , 5 1 ′) are 100 to 105 ° C, 2nd stage (5 2 , 5 2 ′)
Is about 70 ° C, and the third stage (5 3 , 5 3 ') is about 40 ° C.
【００１５】この波型中芯７は厚さ方向の平均気泡径が
約102μmであるスキン層が両面に350μm程度の厚さで存
在し、コア部は厚さ方向の平均気泡径が約226μmで且つ
スキン層の厚さ方向の平均気泡径の1.8倍以上である波
型の独立気泡率約70％以上の発泡ポリスチレンシートで
ある。しかる後に接着材付与装置８，８′例えばリバー
スロールコータを用いて波型中芯７の両面頂部のみに接
着材を固形分換算で20ｇ／m2程度を付与する。この際、
板紙ライナー９，１０全面に接着材を付与しても良い
が、その場合は製品の透湿性が悪化するし、接着材の使
用量が増大するので好ましくない。次いで２本のゴムロ
ール１１，１１′間の圧力を1000ｇ／cm2以下とした間
を通過させる。その際に波型中芯７の両方の面には板紙
ライナー９，１０を送り込み接着，積層させる。その
際、必要あれば板紙ライナー９，１０を予熱或いは調湿
しておく方が有利である。次ぎに常温〜60℃，好ましく
は約40℃に調節した乾燥機１２，１２′中を通して接着
を完了させる。以後、必要に応じて切断，成形する。以
上の操作は12ｍ／分の速度で行なった。The corrugated core 7 has a skin layer having an average bubble diameter in the thickness direction of about 102 μm on both sides with a thickness of about 350 μm, and the core portion has an average bubble diameter in the thickness direction of about 226 μm. Further, it is a corrugated expanded polystyrene sheet having a corrugated closed cell ratio of about 70% or more, which is 1.8 times or more the average cell diameter in the thickness direction of the skin layer. Thereafter, the adhesive applying device 8, 8 ', for example, a reverse roll coater is used to apply the adhesive of about 20 g / m 2 in terms of solid content only to the tops of both surfaces of the corrugated core 7. On this occasion,
An adhesive may be applied to the entire surface of the paperboard liners 9 and 10, but in that case, the moisture permeability of the product is deteriorated and the amount of the adhesive used is increased, which is not preferable. Then, the two rubber rolls 11 and 11 'are allowed to pass while being kept at a pressure of 1000 g / cm 2 or less. At that time, the paperboard liners 9 and 10 are fed to both surfaces of the corrugated core 7 to be bonded and laminated. At that time, it is advantageous to preheat or condition the paperboard liners 9 and 10 if necessary. Next, the bonding is completed by passing through the dryers 12 and 12 'adjusted to room temperature to 60 ° C, preferably about 40 ° C. After that, cutting and molding are performed as necessary. The above operation was performed at a speed of 12 m / min.
【００１６】二次発泡を行なわせる発泡機３の加熱方法
には蒸気，熱風，赤外線，遠赤外線などによる方法が採
用出来るが、その一つは図２の如く赤外線発生機１３に
より金属板１４を均一に加熱し、その熱輻射によって発
泡ポリスチレンシート１を加熱して二次発泡せしめる方
法であり、今一つの方法は図３の如く遠赤外線発生機１
５を利用して発泡ポリスチレンシート１を加熱して二次
発泡せしめる。表面温度を測定・調節することによって
制御を行なうことにより波型成形の均一化及びシートの
収縮を極力押えることが好ましい。なお発泡ポリスチレ
ンシートに代えて発泡ポリエチレンシートを用いた場合
は約10℃温度を上昇せしめることにより同様に製造が出
来た。As a method of heating the foaming machine 3 for carrying out the secondary foaming, a method using steam, hot air, infrared rays, far infrared rays, etc. can be adopted. One of them is as shown in FIG. This is a method in which the polystyrene foam sheet 1 is heated uniformly and then the expanded polystyrene sheet 1 is heated to cause secondary foaming. Another method is as shown in FIG.
5 is used to heat the expanded polystyrene sheet 1 for secondary expansion. It is preferable that the control is performed by measuring and adjusting the surface temperature to suppress the uniformity of corrugation and the shrinkage of the sheet as much as possible. When a foamed polyethylene sheet was used instead of the foamed polystyrene sheet, the same production could be achieved by raising the temperature by about 10 ° C.
【００１７】実施例２ 実施例２は本発明の第２の製造方法を用いる場合であ
り、図４の如く大略の工程は第１の製造方法と同様であ
るが唯、発泡機中を一次発泡ポリスチレンシートが通過
する工程が垂直方向で実施され、その後に水平方向に方
向変換されて以後第１の製造方法に準じて処理されるの
である。最初の工程を垂直にした理由は第１の製造方法
では発泡工程に於いて加熱されるとポリスチレンシート
１がダレルために発泡機３とポリスチレンシート１とが
接触して不都合を生じるためシートの下面側の発泡機と
の距離を充分大ならしめる必要があり、シート両面の加
熱状態に差が生じるか若しくは加熱効率が低下するの
で、之を防止する上で効果を発揮し得る利点があるため
である。Example 2 Example 2 is a case in which the second manufacturing method of the present invention is used, and the general steps are the same as those of the first manufacturing method as shown in FIG. 4, but only the primary foaming is performed in the foaming machine. The step of passing the polystyrene sheet is carried out in the vertical direction, then the direction is changed to the horizontal direction, and thereafter the processing is carried out according to the first manufacturing method. The reason why the first step is made vertical is that in the first manufacturing method, when the polystyrene sheet 1 is heated in the foaming step, the foaming machine 3 and the polystyrene sheet 1 come into contact with each other due to darrel, which causes a problem. Since it is necessary to make the distance to the foaming machine on the side sufficiently large, there is a difference in the heating state on both sides of the sheet or the heating efficiency decreases, so there is an advantage that it can exert an effect in preventing it. is there.
【００１８】即ち、予め発泡倍率５〜10倍に一次発泡せ
しめた二次発泡前の不完全発泡ポリスチレンシート１の
ロールより不完全発泡ポリスチレンシート１を送り込み
ロール２，２′により竪型発泡機３に送り込み不完全発
泡ポリスチレンシート１の両表面を発泡機３中で加熱し
て不完全発泡ポリスチレンシート１の樹脂温度を120〜1
30℃にすることにより第二次発泡を行なわせた後、引続
き該２次発泡シートの温度より低い温度の冷風を吹付け
て発泡ポリスチレンシート１′の少なく共一方の面の表
層部にスキン層を形成せしめて後、約50℃〜105℃に保
った相対向する方向転換兼波型加工用金属製エンボスロ
ール１６，１６′間を通過させる。２本のエンボスロー
ル１６，１６′の一対（一点鎖線円表示部）の凹凸は軽
く噛み合う如くセツトされており、そのクリアランスは
被加工発泡ポリスチレンシート１′の厚みにより適宜調
節され且つ垂直から水平方向に方向転換される。続いて
順次低温度とした複数のエンボスロール間を通過させて
徐冷後、以下、水平方向に進行してからは実施例１に於
ける製造方法に準じて送風機６，６′で約50℃〜20℃迄
徐々に冷却させ、表裏両面に板紙９，１０を供給しつつ
接着材付与装置８，８′で接着材を波型頂部に付与し、
続いて金属製ロール１１″，ゴムロール１１間で僅かに
圧接され積層された後、乾燥機１２，１２′中を通して
固化，乾燥されて製品段ボールを得る。更に必要により
切断・成形されるのである。この場合の対向歯車型ロー
ル１６，１６′では、第１段を95〜105℃，第２段を65
〜75℃，第３段を約50℃に調温した。That is, the incompletely expanded polystyrene sheet 1 is fed from the roll of the incompletely expanded polystyrene sheet 1 before the secondary expansion, which has been first expanded to an expansion ratio of 5 to 10 times, and the vertical foaming machine 3 is fed by the rolls 2 and 2 '. Then, both surfaces of the incompletely expanded polystyrene sheet 1 are heated in the foaming machine 3 to increase the resin temperature of the incompletely expanded polystyrene sheet 1 to 120 to 1
After the secondary foaming is carried out by setting the temperature to 30 ° C., cold air having a temperature lower than the temperature of the secondary foamed sheet is continuously blown to form a skin layer on the surface layer portion of at least one side of the expanded polystyrene sheet 1 ′. After being formed, it is passed between the opposing metal-embossing rolls 16 and 16 'for diverting and corrugating which are maintained at about 50 ° C to 105 ° C. The unevenness of the pair of two embossing rolls 16 and 16 '(indicated by the dashed-dotted line circle) is set so as to mesh lightly, and the clearance is appropriately adjusted by the thickness of the expanded polystyrene sheet 1'to be processed, and the vertical to horizontal direction is set. Is turned to. Then, after gradually passing through a plurality of embossing rolls having a low temperature and gradually cooling, the process proceeds in the horizontal direction, and thereafter, according to the manufacturing method of Example 1, blowers 6 and 6'are operated at about 50 ° C. The adhesive is applied to the corrugated top portion by the adhesive applying devices 8 and 8 ′ while gradually cooling to ˜20 ° C. and supplying the paperboards 9 and 10 to both the front and back sides.
Subsequently, the metal roll 11 ″ and the rubber roll 11 are slightly pressed against each other to be laminated, and then passed through dryers 12 and 12 ′ to be solidified and dried to obtain a product corrugated board. In the opposed gear type rolls 16 and 16 'in this case, the first stage is 95 to 105 ° C and the second stage is 65 ° C.
The temperature of the third stage was adjusted to about 50 ° C.
【００１９】実施例３ 実施例２に於いては図５に示す如く波型加工用金属製対
向歯車型ロール１６の発泡ポリスチレンシートと接触す
る部分１７ではエンボスロールの凹部に設けられた孔を
通じて真空吸引が行なわれポリスチレンシートの離脱を
防止された以外は実施例２と殆んど同一条件で唯接着材
付与装置を出た次ぎに２本の金属製ロール１１，１１′
間を通過させて鮮度保持保冷用段ボールを製造した。な
お波型加工用金属対向歯車型ロール１６′の方にも細孔
を設けてロールの内側から圧搾空気を噴射せしめること
によりポリスチレンシートの離脱を一層防止できた。ま
た圧搾空気を予め冷却しておいて冷風噴射とすることに
よってポリスチレンシートの形状固定を促進することも
出来る。Embodiment 3 In Embodiment 2, as shown in FIG. 5, in the portion 17 of the metal-made counter gear type roll 16 for corrugation that comes into contact with the expanded polystyrene sheet, a vacuum is provided through the hole provided in the recess of the embossing roll. Except for the fact that suction was performed and the separation of the polystyrene sheet was prevented, under the almost same conditions as in Example 2, after leaving the adhesive applying device, two metal rolls 11 and 11 'were used.
A corrugated cardboard for keeping freshness was manufactured by passing through the space. The polystyrene sheet can be further prevented from coming off by providing fine holes also in the corrugated metal opposed gear type roll 16 'and injecting compressed air from the inside of the roll. It is also possible to accelerate the fixation of the shape of the polystyrene sheet by cooling the compressed air in advance and injecting it with cold air.
【００２０】実施例４ 図６に示した如き型押機を用いて中芯のスキン層形成及
び波型加工を行ない、その他は実施例１と同一条件でバ
ッチ式製造を行なった。図中３，３′は発泡機、１８は
真空タンク、１９は雄型フラグ、２０は雌型金型であ
る。Example 4 A batch type production was carried out under the same conditions as in Example 1 except that the core skin layer was formed and corrugated using the embossing machine shown in FIG. In the figure, 3 and 3'is a foaming machine, 18 is a vacuum tank, 19 is a male flag, and 20 is a female mold.
【００２１】実施例５ 予め発泡倍率10〜12倍に一次発泡せしめた二次発泡前の
不完全発泡ポリスチレンシート１のロールより不完全発
泡ポリスチレンシート１を、送り込みロール２，２′に
より発泡機３中へ送り込み、不完全発泡ポリスチレンシ
ート１を発泡機３中で加熱して該不完全発泡ポリスチレ
ンシート１をその変形温度ないし変形温度より60℃高い
温度範囲内に調整することにより二次発泡を行なわせ、
次いで二次発泡のための加熱時の樹脂温度より10〜90℃
低い温度範囲内で複数段に徐々に温度を降下せしめた噛
み合う如く対向させた歯車型状凹凸ロール群５1，
５1′，５2，５2′，５3，５3′間を通過させて発泡済
ポリスチレンシート１′の表層部にスキン層を形成させ
ると同時に波型加工を施し、次いで常温付近迄徐々に冷
却後、該波型加工ポリスチレンシートの波型頂部に接着
材を塗布し、２本の対向するロール間を両面に板紙ライ
ナーを重ね合わせて僅かに圧接，通過せしめて積層した
後、乾燥し、次いで必要に応じて所定寸法に裁断し発泡
ポリスチレン波型中芯段ボールを製造した。上記方法に
よる場合は工程が最も簡便であるが、スキン層の形成が
微弱であり、大なる断熱性を要しない場合に適用でき
る。Example 5 An incompletely expanded polystyrene sheet 1 is fed from a roll of an incompletely expanded polystyrene sheet 1 which has been first expanded at a foaming ratio of 10 to 12 times and which has not yet been subjected to secondary expansion. Secondary foaming is carried out by feeding the incompletely expanded polystyrene sheet 1 into the foaming machine 3 and adjusting the temperature of the incompletely expanded polystyrene sheet 1 to a deformation temperature or a temperature range of 60 ° C. higher than the deformation temperature. Let
Then 10 to 90 ℃ from the resin temperature at the time of heating for secondary foaming
A group of gear-shaped concavo-convex rolls 5 1 , which face each other so as to mesh with each other in which the temperature is gradually lowered in a plurality of stages within a low temperature range.
5 1 ′, 5 2 , 5 2 ′, 5 3 , 5 3 ′ are passed to form a skin layer on the surface layer portion of the expanded polystyrene sheet 1 ′, at the same time corrugated, and then gradually heated to near room temperature. After cooling, the adhesive is applied to the corrugated top of the corrugated polystyrene sheet, a paperboard liner is superposed on both sides between two opposing rolls, slightly pressure-bonded, and allowed to pass through to laminate, and then dried. Then, if necessary, the product was cut into a predetermined size to produce expanded polystyrene corrugated corrugated cardboard. In the case of the above method, the process is the simplest, but it can be applied to the case where the skin layer is weakly formed and a great heat insulating property is not required.
【００２２】[0022]
【発明の効果】従来の射出発泡ポリスチレン容器に代え
て折たたみが可能な段ボール凾に断熱性を有する発泡プ
ラスチックシート（ＰＥ，ＰＳ，ＰＰ等）或いはアルミ
箔，アルミ蒸着フィルム（ＰＥＴ，ＰＥ，ＰＰ等）をラ
ミネートしたりして断熱性の向上を試みられているが、
市場が要求している断熱性能を有する迄には至っておら
ず、その開発が切望されていたのであるが、本発明品は
段ボールの中芯にスキン層を有する発泡プラスチックシ
ートを用いることにより断熱性を格段に向上させた。更
に中芯に堰を設けることにより断熱性の向上を図ったの
である。それによって折たたみが可能で、且つ発泡ポリ
スチレン射出物とほぼ同程度の断熱性を有せしめること
に成功した。EFFECTS OF THE INVENTION A foamed plastic sheet (PE, PS, PP, etc.) or an aluminum foil, an aluminum vapor deposition film (PET, PE, PP) having a heat insulating property in a corrugated cardboard which can be folded in place of a conventional injection expanded polystyrene container is used. Etc.) is attempted to be laminated by
The heat insulation performance required by the market has not been reached, and the development thereof has been earnestly desired. However, the product of the present invention has a heat insulation property by using a foamed plastic sheet having a skin layer in the core of the corrugated board. Was greatly improved. Furthermore, by providing a weir in the center core, the heat insulating property was improved. As a result, it was possible to fold it, and succeeded in providing it with a heat insulation property similar to that of expanded polystyrene injection products.
【００２３】更に容器の外からの有害ガスや匂いの侵入
の防止及び容器内の適度な湿度の保持を可能ならしめ
た。尚一般段ボールにアルミ蒸着したものよりも本発明
品は段厚が低いに拘わらず保温性が良好である利点を有
している。また本発明に成る波型中芯の何れか一方の面
または両面にプラスチックフィルムを積層することによ
り断熱性を増大せしめると同時に一層圧縮強度を向上さ
せることが出来たので包装凾を積み重ねる場合に非常に
有利となった。以上詳述した如く本発明に係る鮮度保持
保冷用段ボールは、表裏両面が板紙ライナーであり、波
型中芯を構成する素材が発泡プラスチックシートであり
且つ発泡プラスチックシートの少なくとも一方の面に10
0〜700μmの厚さのスキン層が形成されているので素材
の増量を必要とせず、しかも断熱性を向上せしめること
を可能ならしめているのである。Further, it is possible to prevent the invasion of harmful gas and odor from the outside of the container and to maintain an appropriate humidity inside the container. It should be noted that the product of the present invention has an advantage that the heat retaining property is good in spite of the low step thickness, as compared with the case where aluminum is vapor-deposited on general corrugated board. Further, by laminating a plastic film on either or both surfaces of the corrugated core according to the present invention, the heat insulating property can be increased and at the same time the compressive strength can be further improved. Became advantageous to. As described above in detail, the corrugated cardboard for keeping freshness according to the present invention is such that the front and back surfaces are both paperboard liners, the material constituting the corrugated core is a foamed plastic sheet, and at least one surface of the foamed plastic sheet is 10
Since a skin layer having a thickness of 0 to 700 μm is formed, it is possible to improve the heat insulating property without the need to increase the amount of the material.
【００２４】本発明に於いて波型中芯を従来のボール紙
に代えて発泡プラスチックシートを加工したものとする
事によって溝部に堰を設ける場合に堰の加工が非常に簡
単容易となるのでコスト的に極めて有利であり、しかも
断熱性も良好である事が確認された。波型中芯の溝中へ
遮断堰が設けられている場合には更に断熱性能が向上し
ており、また波型中芯の一方の面が板紙ライナーを介し
て更に発泡プラスチックシートを積層されたものである
場合には収納品の表面擦傷防止効果を達成したものであ
り、折り畳み可能で軽量な包装凾用段ボールを提供する
ことが出来、しかも湿潤強度が従来の段ボールに比し顕
著に大きい利点を有しており、更に生鮮品の鮮度保持に
優れた性能を有している。また本発明方法は上記効果を
有する本発明品を安価且つ容易に製造出来る方法であ
り、その工業的価値は非常に大きなものである。上記の
如き多くの利点を有する発泡プラスチックシートより成
る波型中芯を簡単な方法で且つ正確な形状に加工する技
術を開発した本発明の産業上に貢献する処は極めて大な
るものである。In the present invention, when the corrugated core is replaced with a conventional cardboard and a foamed plastic sheet is processed, the processing of the weir becomes very easy and easy when the weir is provided in the groove portion. It was confirmed that it is extremely advantageous and that the heat insulating property is also good. When a blocking weir is provided in the groove of the corrugated core, the heat insulation performance is further improved, and one surface of the corrugated core is further laminated with a plastic foam sheet via a paperboard liner. If it is one, it has achieved the effect of preventing the surface scratches of the stored items, and it is possible to provide a foldable and lightweight cardboard for packaging, and the advantage that the wet strength is significantly larger than that of conventional cardboard. In addition, it has excellent performance in keeping the freshness of fresh products. The method of the present invention is a method for inexpensively and easily producing the product of the present invention having the above-mentioned effects, and its industrial value is very large. The technique of processing a corrugated core made of a foamed plastic sheet having many advantages as described above into a precise shape by a simple method is a great contribution to the industry of the present invention.
【図１】本発明品の製造工程を説明する略図である。FIG. 1 is a schematic view illustrating a manufacturing process of a product of the present invention.
【図２】赤外線利用発泡機の加熱方法説明図である。FIG. 2 is an explanatory view of a heating method of an infrared ray foaming machine.
【図３】遠赤外線利用発泡機の加熱方法説明図である。FIG. 3 is an explanatory view of a heating method of a foaming machine using far infrared rays.
【図４】実施例２の竪型方式の製造工程図である。FIG. 4 is a manufacturing process diagram of a vertical method according to a second embodiment.
【図５】歯車型状凹凸ロール部の拡大断面図である。FIG. 5 is an enlarged cross-sectional view of a gear-shaped uneven roll portion.
【図６】実施例４のバッチ式製造法を説明する図であ
る。FIG. 6 is a diagram illustrating a batch-type manufacturing method of Example 4.
１ 不完全発泡ポリスチレンシート １′ 発泡ポリスチレンシート ２，２′ 送り込みロール ３，３′ 発泡機 ４，４′ ロール ５1，５1′，５2，５2′，５3，５3′ 歯車形状冷却ロ
ール群 ６，６′ 送風機 ７ 波型中芯 ８，８′ 接着材付与装置 ９ 板紙ライナー １０ 板紙ライナー １１，１１′ ゴムロール １１″ 金属製ロール １２，１２′ 乾燥機 １３ 赤外線発生機 １４ 金属板 １５ 遠赤外線発生機 １６，１６′ 波形加工用金属対向歯車型ロール １７ エンボスロールと発泡プラスチックシートとの接
触部分 １８ 真空タンク １９ 雄型フラグ ２０ 雌型金型1 Incomplete expanded polystyrene sheet 1 'expanded polystyrene sheets 2, 2' feed rolls 3,3 'foamer 4,4' roll 5 1, 5 1 ', 5 2, 5 2', 5 3, 5 3 'gear shape Cooling roll group 6,6 'Blower 7 Corrugated core 8,8' Adhesive applying device 9 Paperboard liner 10 Paperboard liner 11, 11 'Rubber roll 11 "Metal roll 12,12' Dryer 13 Infrared generator 14 Metal plate 15 Far-infrared ray generator 16, 16 'Metal facing gear type roll for corrugation 17 Contact part between embossing roll and foam plastic sheet 18 Vacuum tank 19 Male type flag 20 Female type mold
フロントページの続き (51)Int.Cl.5 識別記号 庁内整理番号 ＦＩ 技術表示箇所 // Ｂ２９Ｋ 105:04 Continuation of front page (51) Int.Cl. 5 Identification code Office reference number FI technical display area // B29K 105: 04
Claims (9)
チックシートの両表面を発泡機中で蒸気，熱風，赤外
線，遠赤外線などにより加熱して該不完全発泡プラスチ
ックシートをその変形温度ないし変形温度より60℃高い
温度範囲内に調整にすることによって二次発泡を行なわ
せると同時に該発泡プラスチックシートの少なくとも一
方の面を該発泡プラスチックシートの表面温度より10〜
90℃低い温度に調節され高温から低温に温度傾斜させた
複数段式ロールと接触せしめるか、若しくは高温から低
温に順次温度を低下させた気体を複数段に吹付けて発泡
プラスチックシートの表層部にスキン層を形成せしめて
後、前記二次発泡のための加熱時の樹脂温度より10〜90
℃低い温度範囲内で複数段に徐々に温度を降下せしめた
噛み合う如く対向させた歯車型状凹凸冷却ロール若しく
は対向するカタピラ式型付機間を通過させて発泡プラス
チックシートを連続式またはバッチ式にて波型加工し、
次いで冷却後、該波型発泡プラスチックシートの波型頂
部に接着材を塗布し、２本の対向するロール間を両面に
板紙ライナーを重ね合わせて僅かに圧接、通過せしめて
積層した後、乾燥し、次いで必要に応じて所定寸法に裁
断することを特徴とする発泡プラスチック波型中芯段ボ
ールの製造方法。1. A deformation temperature or a deformation temperature of the incompletely foamed plastic sheet obtained by heating both surfaces of the incompletely foamed plastic sheet having a remaining foaming capacity in a foaming machine with steam, hot air, infrared rays, far infrared rays or the like. Secondary foaming is carried out by adjusting the temperature within a temperature range higher than 60 ° C., and at least one surface of the foamed plastic sheet is at least 10 ° C. higher than the surface temperature of the foamed plastic sheet.
The temperature of the foamed plastic sheet can be adjusted by contacting it with a multi-stage roll that is adjusted to a low temperature of 90 ° C and inclined from a high temperature to a low temperature, or by spraying a gas whose temperature is gradually decreased from a high temperature to a low temperature in multiple stages. After forming the skin layer, the resin temperature during heating for the secondary foaming is 10 to 90 depending on the temperature.
In the low temperature range, the temperature is gradually lowered in multiple stages, and the foamed plastic sheet is made into a continuous type or batch type by passing between gear-shaped concavo-convex cooling rolls facing each other like meshing or catapira type molds facing each other. Corrugated,
Then, after cooling, an adhesive is applied to the corrugated top of the corrugated foamed plastic sheet, a paperboard liner is superposed on both surfaces between two opposed rolls, slightly pressure-contacted, and allowed to pass to form a laminate, which is then dried. Then, a method for producing a corrugated cardboard made of corrugated foamed plastic, which is then cut into a predetermined size if necessary.
る不完全発泡プラスチックシートを上方より下方へ竪型
発泡機中を通過せしめて蒸気，熱風，赤外線，遠赤外線
などにより加熱して該不完全発泡プラスチックシートを
該プラスチックシートの樹脂変形温度ないしそれより60
℃高い温度範囲内に調節して二次発泡せしめ、引続き該
発泡プラスチックシートの少なく共一方の面を該発泡プ
ラスチックシートの表面温度より低い温度のロールと接
触せしめるか若しくは該発泡プラスチックシートの表面
温度より低温度の気体吹付けにより発泡プラスチックシ
ートの表層部にスキン層を形成せしめて後、前記二次発
泡のための加熱時の樹脂温度より10〜90℃低い温度範囲
内で複数段に徐々に温度を降下せしめた噛み合う如く所
定間隔を置いて対向せしめた歯車型状凹凸ロール若しく
は対向するカタピラ式型付機の間を前記スキン層形成済
発泡プラスチックシートを通過せしめて連続または非連
続的に波型加工を施し且つこの部分付近にて該プラスチ
ックシートの進行方向を垂直方向から水平方向に変換せ
しめ、次いで徐々に冷却後、該波型発泡プラスチックシ
ートの波型頂部に接着材を塗布し、２本のロール間を両
面に板紙ライナーを重ね合わせて僅かに圧接しながら通
過せしめて積層させた後、乾燥させ、次いで必要に応じ
て所定寸法に裁断・成型することを特徴とする発泡プラ
スチック波型中芯段ボールの製造方法。2. An incompletely foamed plastic sheet, which has a foaming capacity left vertically, is passed through a vertical foaming machine from above to below and heated by steam, hot air, infrared rays, far infrared rays, or the like. An incompletely foamed plastic sheet should have a plastic deformation temperature of 60% or higher.
Secondary foaming is performed by adjusting the temperature within a high temperature range of 0 ° C., and then at least one side of the foamed plastic sheet is brought into contact with a roll having a temperature lower than the surface temperature of the foamed plastic sheet, or the surface temperature of the foamed plastic sheet. After forming a skin layer on the surface layer portion of the foamed plastic sheet by blowing a gas at a lower temperature, the temperature is gradually increased in multiple stages within a temperature range 10 to 90 ° C. lower than the resin temperature during heating for the secondary foaming. The skin layer-formed foamed plastic sheet is passed between the gear-shaped concavo-convex rolls facing each other or the opposed caterpillar-type mold machines facing each other at a predetermined interval so that they mesh with each other. Mold processing is performed and the advancing direction of the plastic sheet is converted from the vertical direction to the horizontal direction in the vicinity of this portion, and then gradually. After cooling, an adhesive is applied to the corrugated top of the corrugated foamed plastic sheet, a paperboard liner is superposed on both sides between two rolls, slightly passed under pressure to be laminated, and then dried, Next, a method of manufacturing a foamed plastic corrugated corrugated cardboard, which is characterized by cutting and molding to a predetermined size if necessary.
チックシートの両表面を発泡機中で加熱して該不完全発
泡プラスチックシートをその変形温度ないし変形温度よ
り60℃高い温度範囲内に調整することによって二次発泡
を行なわせ、次いで二次発泡のための加熱時の樹脂温度
より10〜90℃低い温度範囲内で複数段に徐々に温度を降
下せしめた噛み合う如く対向させた歯車型状凹凸冷却ロ
ール間若しくは対向するカタピラ式型付機間を通過させ
て発泡プラスチックシートの表層部にスキン層を形成さ
せると同時に波型加工を施し、次いで冷却後、該波型発
泡プラスチックシートの波型頂部に接着材を塗布し、２
本の対向するロール間を両面に板紙ライナーを重ね合わ
せて僅かに圧接・通過せしめて積層させた後、乾燥し、
次いで必要に応じて所定寸法に裁断することを特徴とす
る発泡プラスチック波型中芯段ボールの製造方法。3. The incompletely foamed plastic sheet is heated in a foaming machine to adjust the temperature of the incompletely foamed plastic sheet to a deformation temperature or a temperature range higher than the deformation temperature by 60 ° C. Secondary foaming is performed by the following, and then the temperature is gradually lowered in multiple steps within a temperature range 10 to 90 ° C lower than the resin temperature at the time of heating for secondary foaming. The skin layer is formed on the surface layer portion of the foamed plastic sheet by passing it between cooling rolls or between machines facing each other with a caterpillar type die, and at the same time, the corrugated shape is applied to the corrugated foamed plastic sheet after cooling. Apply adhesive to 2
After stacking the paperboard liners on both sides between the opposing rolls of the book, slightly pressing and passing them to stack them, and then drying,
Next, a method for manufacturing a foamed plastic corrugated corrugated cardboard, which is characterized in that it is cut into a predetermined size if necessary.
速度を被加工プラスチックシートの走行速度より1.2倍
程度大ならしめる請求項１〜３中の何れか１項に記載の
発泡プラスチック波型中芯段ボールの製造方法。4. The corrugated plastic foam according to any one of claims 1 to 3, wherein the rotational peripheral speed of the multi-stage rolls for skin layer formation is about 1.2 times higher than the traveling speed of the plastic sheet to be processed. Manufacturing method of core corrugated board.
細孔を設け雄型ロールと噛み合う部分の内部を真空吸引
する如くした請求項１〜４中の何れか１項に記載の発泡
プラスチック波型中芯段ボールの製造方法。5. The foam according to claim 1, wherein pores are provided in the female concave portions of the pair of gear-shaped concavo-convex rolls and the inside of the portion meshing with the male roll is vacuum-sucked. Manufacturing method of plastic corrugated corrugated board.
に細孔を設け雌型ロールと噛み合う部分周辺の内部に圧
縮空気を吹き入れ、上記細孔から噴射する如くした請求
項１ないし５中の何れか１項に記載の発泡プラスチック
波型中芯段ボールの製造方法。6. A pair of gear-shaped concavo-convex rolls are provided with fine pores in the male concave-convex portions, and compressed air is blown into the periphery of the portion meshing with the female roll so as to be ejected from the fine pores. 5. The method for producing a foamed plastic corrugated corrugated cardboard according to any one of 5 above.
部分でプラスチックフィルムを発泡プラスチックシート
の少なく共一方の面に重ね合わせる工程を付加した請求
項１ないし６中の何れか１項に記載の発泡プラスチック
波型中芯段ボールの製造方法。7. The method according to claim 1, further comprising a step of superimposing a plastic film on one surface of at least one of the foamed plastic sheets in a portion before corrugation processing with an uneven cooling roll. For producing corrugated foamed corrugated corrugated cardboard.
を設けた請求項１ないし７中の何れか１項に記載の発泡
プラスチック波型中芯段ボールの製造方法。8. The method of manufacturing a foamed plastic corrugated corrugated cardboard according to claim 1, wherein a corrugated corrugated core groove is provided with a shielding weir with an uneven cooling roll.
発泡プラスチックシートを積層せしめる工程を付加した
請求項１ないし８中の何れか１項に記載の発泡プラスチ
ック波型中芯段ボールの製造方法。9. The method for producing a corrugated expanded plastic corrugated board according to claim 1, wherein a step of laminating a foamed plastic sheet on at least one side of the double-sided liner paperboard is added.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP04161673A JP3139575B2 (en) | 1991-11-01 | 1992-05-29 | Method for manufacturing corrugated cardboard made of corrugated plastic foam |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3-313162 | 1991-11-01 | ||
| JP31316291 | 1991-11-01 | ||
| JP04161673A JP3139575B2 (en) | 1991-11-01 | 1992-05-29 | Method for manufacturing corrugated cardboard made of corrugated plastic foam |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH05177752A true JPH05177752A (en) | 1993-07-20 |
| JP3139575B2 JP3139575B2 (en) | 2001-03-05 |
Family
ID=26487728
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP04161673A Expired - Fee Related JP3139575B2 (en) | 1991-11-01 | 1992-05-29 | Method for manufacturing corrugated cardboard made of corrugated plastic foam |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3139575B2 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003078155A1 (en) * | 2002-03-19 | 2003-09-25 | Carlo Fascio | Corrugated packaging and insulation material |
| WO2007094305A1 (en) * | 2006-02-15 | 2007-08-23 | The Yokohama Rubber Co., Ltd. | Method and device for producing winding liner with spacer for unvulcanized strip rubber member, and method and device for producing spacer member for winding liner |
| JP2007216452A (en) * | 2006-02-15 | 2007-08-30 | Yokohama Rubber Co Ltd:The | Manufacturing method of spacer member of unvulcanized strip of rubber member taking-up linear, manufacturing apparatus therefor, manufacturing method of taking-up liner with spacer of unvulcanized strip of rubber and manufacturing apparatus therefor |
| US7951252B2 (en) * | 2000-02-01 | 2011-05-31 | Peter Danko | Method and apparatus for closing an open end of a product, and product formed thereby |
-
1992
- 1992-05-29 JP JP04161673A patent/JP3139575B2/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7951252B2 (en) * | 2000-02-01 | 2011-05-31 | Peter Danko | Method and apparatus for closing an open end of a product, and product formed thereby |
| WO2003078155A1 (en) * | 2002-03-19 | 2003-09-25 | Carlo Fascio | Corrugated packaging and insulation material |
| WO2007094305A1 (en) * | 2006-02-15 | 2007-08-23 | The Yokohama Rubber Co., Ltd. | Method and device for producing winding liner with spacer for unvulcanized strip rubber member, and method and device for producing spacer member for winding liner |
| JP2007216452A (en) * | 2006-02-15 | 2007-08-30 | Yokohama Rubber Co Ltd:The | Manufacturing method of spacer member of unvulcanized strip of rubber member taking-up linear, manufacturing apparatus therefor, manufacturing method of taking-up liner with spacer of unvulcanized strip of rubber and manufacturing apparatus therefor |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3139575B2 (en) | 2001-03-05 |
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