JP4530749B2 - Sealed cardboard composite container - Google Patents
Sealed cardboard composite container Download PDFInfo
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- JP4530749B2 JP4530749B2 JP2004211655A JP2004211655A JP4530749B2 JP 4530749 B2 JP4530749 B2 JP 4530749B2 JP 2004211655 A JP2004211655 A JP 2004211655A JP 2004211655 A JP2004211655 A JP 2004211655A JP 4530749 B2 JP4530749 B2 JP 4530749B2
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- 239000011111 cardboard Substances 0.000 title claims description 80
- 239000002131 composite material Substances 0.000 title claims description 36
- 229920003023 plastic Polymers 0.000 claims description 31
- 239000004033 plastic Substances 0.000 claims description 31
- 238000007789 sealing Methods 0.000 claims description 15
- 239000000123 paper Substances 0.000 claims description 11
- 230000002265 prevention Effects 0.000 claims description 8
- 238000003825 pressing Methods 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims 1
- 239000000463 material Substances 0.000 description 10
- 230000004927 fusion Effects 0.000 description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 9
- -1 polyethylene Polymers 0.000 description 5
- 239000004743 Polypropylene Substances 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 229920006248 expandable polystyrene Polymers 0.000 description 3
- 235000013305 food Nutrition 0.000 description 3
- 239000005457 ice water Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 229920001155 polypropylene Polymers 0.000 description 3
- 235000013311 vegetables Nutrition 0.000 description 3
- 241000251468 Actinopterygii Species 0.000 description 2
- 241000555825 Clupeidae Species 0.000 description 2
- 239000004952 Polyamide Substances 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 2
- 239000004793 Polystyrene Substances 0.000 description 2
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 2
- 230000005856 abnormality Effects 0.000 description 2
- 239000005038 ethylene vinyl acetate Substances 0.000 description 2
- 235000019688 fish Nutrition 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 description 2
- 229920002647 polyamide Polymers 0.000 description 2
- 229920000573 polyethylene Polymers 0.000 description 2
- 229920000098 polyolefin Polymers 0.000 description 2
- 229920002223 polystyrene Polymers 0.000 description 2
- 235000019512 sardine Nutrition 0.000 description 2
- 235000013527 bean curd Nutrition 0.000 description 1
- 235000013361 beverage Nutrition 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- DQXBYHZEEUGOBF-UHFFFAOYSA-N but-3-enoic acid;ethene Chemical compound C=C.OC(=O)CC=C DQXBYHZEEUGOBF-UHFFFAOYSA-N 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000011038 discontinuous diafiltration by volume reduction Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 238000007429 general method Methods 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 229920000092 linear low density polyethylene Polymers 0.000 description 1
- 239000004707 linear low-density polyethylene Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000002991 molded plastic Substances 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 239000010893 paper waste Substances 0.000 description 1
- 239000011087 paperboard Substances 0.000 description 1
- 239000002985 plastic film Substances 0.000 description 1
- 229920000515 polycarbonate Polymers 0.000 description 1
- 239000004417 polycarbonate Substances 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 229920006327 polystyrene foam Polymers 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 239000005060 rubber Substances 0.000 description 1
- 235000014102 seafood Nutrition 0.000 description 1
- 229920003051 synthetic elastomer Polymers 0.000 description 1
- 239000005061 synthetic rubber Substances 0.000 description 1
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Description
本発明は、氷詰めされた保冷性、密封性を要する農水産物の発泡スチロール輸送容器に代えて使用できる、密封された段ボール複合ケース又は段ボール複合トレー及びその密封方法に関する。 TECHNICAL FIELD The present invention relates to a sealed corrugated cardboard composite case or corrugated cardboard composite tray that can be used in place of an ice-packed styrene foam transport container for agricultural and marine products that requires cold insulation and sealing, and a sealing method thereof.
従来、鮮魚、生鮮野菜等の輸送容器としては発泡スチロール容器が主流を占めており、段ボール容器を利用して、その内部に装入したプラスティック容器の上面をフィルムで密封熱融着するという技術は確立されていなかった。
一方、段ボール紙は耐水性及び密封性に欠けるが、中芯の各波と両面の板紙との間に、空気の対流を抑制できる空間を有し、保温力と緩衝性を有する。しかも折りたたみが容易で嵩張らず、使用後は古紙として繊維の再利用が可能であり、環境上も好ましい素材である。
Conventionally, polystyrene foam containers have been the mainstream for transporting fresh fish, fresh vegetables, etc., and a technology has been established that uses a cardboard container to seal and heat-seal the upper surface of a plastic container placed inside the container. Was not.
On the other hand, corrugated paper lacks water resistance and sealing properties, but has a space that can suppress air convection between each wave of the core and the paperboard on both sides, and has heat retention and buffering properties. Moreover, it is easy to fold and is not bulky, and after use, the fibers can be reused as waste paper.
更に、段ボール箱内に袋詰めした内容物、特に流動性ないし半流動性の内容物を装入する所謂、バッグ・イン・ボックスが広く使用されつつあるが、鮮魚、生鮮野菜等の保冷、漏水防止輸送容器には使用されなかった。特許文献１には生鮮食料品や飲料を宅配便により輸送する容器として、段ボール容器の内部を、段ボール紙と発泡スチロール板とで補強した容器が開示されているが、この技術も発泡スチロールを使用する点で未だ不充分である。 In addition, so-called bag-in-boxes that are filled with contents packed in cardboard boxes, especially fluid or semi-fluid contents, are being widely used. Cooling and leakage of fresh fish, fresh vegetables, etc. Not used for prevention transport containers. Patent Document 1 discloses a container in which the inside of a corrugated cardboard container is reinforced with corrugated paper and a foamed polystyrene plate as a container for transporting fresh food and beverages by courier. This technology also uses a foamed polystyrene. It is still insufficient.
気密・防水性を必要とする豆腐容器やカップ容器のようなプラスティック又は熱融着性素材からなる容器上面をフィルムにて密封熱融着する場合、その容器の熱融着面を均一な面で保持し、その上にフィルムを被せ熱融着板を押付け密封する方法が一般的である。
近時、補強された段ボール容器に一体に装入したプラスティックとの複合容器に、生鮮魚介類や生鮮野菜等を装入し、上面をフィルムで熱融着し耐圧性、漏水防止性、気密性、剥離性を付与して輸送する技術が求められていた。
Recently, fresh seafood, fresh vegetables, etc. are placed in a plastic container that is integrally loaded in a reinforced cardboard container, and the upper surface is heat-sealed with a film to provide pressure resistance, water leakage prevention, and airtightness. Therefore, a technology for imparting peelability and transporting has been demanded.
シート成形されたプラスティック容器は肉薄であるため、内容物を装填するとそれ単独では十分な自己保形性がなく、その状態で容器開口部をフィルムで密封融着するには平滑な熱融着面を有した何らかのメス型を必要とする。このメス型として、段ボール容器の底面から直立する側板を利用し、その上端を熱融着時の受面として利用することを検討した。 Sheet molded plastic containers are thin, so when they are loaded, they do not have sufficient self-retaining properties, and a smooth heat-sealing surface is required to seal and fuse the container opening with a film in that state. It requires some female having a. As this female type, a side plate standing upright from the bottom surface of the corrugated cardboard container was used, and the use of its upper end as a receiving surface at the time of heat fusion was examined.
しかしながら、耐圧構造を有する段ボール容器の底面から直立する側板上端を熱融着時の受面とし、その中に装入されるプラスティック容器の上フランジとオーバーラップフィルムとを周囲均一な圧力で熱融着するのは困難であった。それは、段ボール容器の底面から直立する４面の側板の高さにバラツキがあることに起因する。段ボール容器の側面の上端位置にバラツキがあるため、水平な熱融着用熱板で押圧しても側板上端の位置が低い部位では充分に熱が伝達されず、不完全融着部が混在し、輸送中の気密性が損なわれがちであった。 However, the upper end of the side plate that stands upright from the bottom of the corrugated cardboard container having a pressure-resistant structure is used as a receiving surface during heat-sealing, and the upper flange and the overlap film of the plastic container inserted therein are heat-fused with a uniform pressure around them. It was difficult to wear. This is due to variations in the height of the four side plates standing upright from the bottom surface of the cardboard container. Because there is variation in the upper end position of the side surface of the corrugated cardboard container, even if it is pressed with a horizontal hot-melting hot plate, heat is not sufficiently transferred in the part where the position of the upper end of the side plate is low, and incompletely fused portions are mixed, Airtightness during transportation tends to be impaired.
本発明は上記課題を解決することを目的にとし、その構成は、補強された段ボール容器１の内部に、シート成形され、上記段ボール容器の側板上端３を覆う上フランジ５及び該上フランジからズレ防止縁７を延出したプラスティック容器４が一体に装入され、内容物を装入された容器開口部がオーバーラップフィルム８で、上フランジが密封融着されており、このプラスティック容器の上フランジ５から、凸状突条６が突出していることを特徴とし、段ボール容器の底面から直立する側板上端を融着受面とし、上記凸状突条とオーバーラップフィルムとをフィルム融着機により熱融着することを特徴とする。 An object of the present invention is to solve the above-described problems. The structure of the present invention is that a sheet is molded inside a reinforced corrugated cardboard container 1 and covers the upper end 3 of the side plate of the corrugated cardboard container. The plastic container 4 extending the prevention edge 7 is integrally inserted, the container opening into which the contents are charged is an overlap film 8, and the upper flange is hermetically sealed. The upper flange of this plastic container 5 is characterized in that a convex ridge 6 protrudes, the upper end of the side plate standing upright from the bottom surface of the cardboard container is used as a fusion receiving surface, and the convex ridge and the overlap film are heated by a film fusion machine. It is characterized by fusing.
すなわち、本発明は段ボール容器の側板の内側に補強段ボール紙を組込むことで胴膨れを防止し、耐圧強化された段ボール容器に、プラスティック容器を一体に装入した複合容器を用いる。プラスティック容器の上フランジに凸状突条を設け、この凸状突条で囲まれた段ボール複合容器の開口部にオーバーラップフィルムを被せ、熱融着板で熱融着するものである。 That is, the present invention uses a composite container in which a plastic container is integrally inserted into a corrugated cardboard container that has been reinforced with pressure resistance by incorporating reinforced corrugated paper inside the side plate of the corrugated cardboard container. Convex ridges are provided on the upper flange of the plastic container, and an overlap film is placed on the opening of the corrugated cardboard composite container surrounded by the convex ridges, and heat-sealed with a heat-sealing plate.
その結果、段ボール複合容器においては通常みられる側板の高さのバラツキを、プラスティック容器の上フランジに設けた凸状突条が吸収し、プラスティック容器の開口部を囲む凸状突条がオーバーラップフィルムと均一な剥離強度で熱融着し、段ボール複合容器に耐圧性、気密性及び漏水防止性を付与することができる。本発明のプラスティック容器はシート成型されているため、上フランジの肉厚は引き延ばされて薄く、更に、その上に成形された凸状突条の肉厚は更に薄く、容易に側板上端位置の差を吸収できる。 As a result, the height variation of the side plate that is usually seen in corrugated cardboard containers is absorbed by the convex ridges provided on the upper flange of the plastic container, and the convex ridges surrounding the opening of the plastic container are overlap films. The film can be heat-sealed with a uniform peel strength to give pressure resistance, air tightness and water leakage prevention property to the corrugated cardboard composite container. Since the plastic container of the present invention is sheet-molded, the thickness of the upper flange is extended and thin, and the thickness of the convex protrusion formed thereon is further thin, and the side plate upper end position is easily Can absorb the difference.
段ボール複合容器に内容物を装入した後の漏水防止と開封性とを共に可能にするため、基材フィルムと易剥離性フィルムからなる積層フィルムをオーバーラップフィルムとして用いる。オーバーラップフィルムと凸状突条との熱融着部の剥離強度は５〜９Ｎ／１５ｍｍである。更に、耐圧構造を有する段ボール容器の底面から直立する側板上端を熱融着時の受面に供することで特殊な設備を必要とせず、比較的大型の段ボール複合容器を生鮮食品等の輸送に提供することができる。 In order to enable both water leakage prevention and unsealing after the contents are loaded into the corrugated cardboard composite container, a laminated film composed of a base film and an easily peelable film is used as the overlap film. The peel strength of the heat-sealed portion between the overlap film and the convex ridge is 5 to 9 N / 15 mm. In addition, the upper end of the side plate that stands upright from the bottom of the corrugated cardboard container having a pressure-resistant structure is used as a receiving surface during heat-sealing, so that no special equipment is required and a relatively large corrugated cardboard container is provided for the transportation of fresh food, etc. can do.
耐圧構造を有する段ボール容器の内部にプラスティック容器を一体に装入した複合容器に、内容物を装入したまま、プラスティック容器の凸状突条とオーバーラップフィルムとを熱融着密封する本発明により、発泡ポリスチロールの代替容器として、農水産関係の生鮮食品用容器としての利用が可能となった。
更に、本発明により、リサイクル性、減容化の面で著しい向上が図られ、環境保護の上で好ましい容器として利用することが可能となった。
According to the present invention, the convex ridge of the plastic container and the overlap film are heat-sealed and sealed while the contents are charged in the composite container in which the plastic container is integrally inserted into the corrugated cardboard container having the pressure-resistant structure. As an alternative to foamed polystyrene, it can be used as a container for fresh foods related to agriculture and fisheries.
Furthermore, according to the present invention, remarkability has been significantly improved in terms of recyclability and volume reduction, and it has become possible to use it as a preferred container for environmental protection.
図１は本発明複合容器を段ボール容器とプラスティック容器に分離して示した斜視図であり、図２は複合段ボール容器を密封する状態を示した中央部切断端面図、図３はプラスティック容器を一体に装入した段ボール容器の、上フランジに設けた凸状突条部分の端面図である。 FIG. 1 is a perspective view showing the composite container of the present invention separated into a corrugated cardboard container and a plastic container, FIG. 2 is a sectional end view showing a state in which the composite corrugated cardboard container is sealed, and FIG. 3 is an integrated plastic container. It is an end elevation of the convex protrusion part provided in the upper flange of the cardboard container inserted in.
１は段ボール容器、２は段ボール容器１を内部から補強する補強段ボール紙、３は側板上端である。本発明に使用する補強された段ボール容器１とは、段ボールケース又は段ボールトレー等であり、一般的に図１に示すように、側板が底板からほぼ垂直に立ち上がり上面に開口部を有する直方体である。図５に示すように、更に段ボール製の蓋を被せて使用する場合も含む。補強段ボール紙２、２’は、図１に示すように、少なくとも両方の端部が異なる側板に貼着されていることを要する。しかも、側板に貼着されていない端部以外の部位が存在することを要する。図１においては、互いに隣接する側板に貼着されていない部位が、段ボール容器の角部に存在する。そして、互いに隣接する側板の位置を固定して胴ぶくれを防止している。図１においては、四隅に側板に貼着されていない端部以外の部位が存在するため、段ボール容器１の内部形状は八角形である。 1 is a corrugated cardboard container, 2 is a reinforced corrugated paper that reinforces the cardboard container 1 from the inside, and 3 is an upper end of the side plate. The reinforced corrugated cardboard container 1 used in the present invention is a corrugated cardboard case, a corrugated cardboard tray or the like, and is generally a rectangular parallelepiped whose side plate rises substantially vertically from the bottom plate and has an opening on the upper surface as shown in FIG. . As shown in FIG. 5, it also includes a case where a cardboard cover is used. As shown in FIG. 1, the reinforced corrugated paper 2, 2 'is required to have at least both ends attached to different side plates. Moreover, it is necessary that there is a portion other than the end portion that is not attached to the side plate. In FIG. 1, the site | part which is not stuck to the side plate adjacent to each other exists in the corner | angular part of a cardboard container. And the position of the side plate which adjoins mutually is fixed, and the body bulge is prevented. In FIG. 1, since there are parts other than the end portions not attached to the side plates at the four corners, the internal shape of the cardboard container 1 is an octagon.
プラスティック容器４は段ボール容器１内に一体に装入される形状であり、図１においては八角形である。上端に側板上端に被さる上フランジ５を設け、更に、上フランジ５からズレ防止縁７を下方に向かって延出する。６は上フランジ５から上方に延出した凸状突条である。図１の矢印に示すように、プラスティック容器４を段ボール容器１に装入すると、図２に示すように、プラスティック容器４は段ボール容器１と一体になるよう前もって成形される。 The plastic container 4 has a shape that is integrally inserted into the cardboard container 1, and is an octagonal shape in FIG. An upper flange 5 that covers the upper end of the side plate is provided at the upper end, and a shift preventing edge 7 extends downward from the upper flange 5. Reference numeral 6 denotes a convex ridge extending upward from the upper flange 5. As shown by the arrow in FIG. 1, when the plastic container 4 is inserted into the cardboard container 1, the plastic container 4 is formed in advance so as to be integrated with the cardboard container 1 as shown in FIG. 2.
図３（ｂ）には側板上端付近の端面図を示した。図３（ａ）には１例として、各部分の長さをｍｍ単位で記入した。凸状突条６の幅は上フランジの幅より小さければよく、図３（ａ）に示すように、使用した段ボール紙の厚さを５ｍｍとすると、凸状突条６の幅は５ｍｍ以下であることを要し、好ましくは２〜３ｍｍである。高さは段ボール容器の成形上のバラツキを吸収するに足りる高さであり、１〜４ｍｍ、好ましくは２〜３ｍｍである。段ボール容器１の側板上端３の高さのバラツキは１〜２ｍｍ程度であるため、凸状突条６の高さが２〜３ｍｍあれば充分に吸収でき、凸状突条６とオーバーラップフィルム８が均等な剥離強度で熱融着される。
密封の方法として、熱融着以外、高周波や超音波での方法も可能である。
FIG. 3B shows an end view near the upper end of the side plate. In FIG. 3A, as an example, the length of each part is entered in mm. The width of the convex ridge 6 should be smaller than the width of the upper flange. As shown in FIG. 3A, when the thickness of the corrugated paper used is 5 mm, the width of the convex ridge 6 is 5 mm or less. It needs to be, and preferably 2 to 3 mm. The height is a height that is sufficient to absorb variations in the formation of the cardboard container, and is 1 to 4 mm, preferably 2 to 3 mm. Since the variation in height of the side plate upper end 3 of the corrugated cardboard container 1 is about 1 to 2 mm, it can be sufficiently absorbed if the height of the convex ridge 6 is 2 to 3 mm, and the convex ridge 6 and the overlap film 8 can be absorbed. Is heat-sealed with an even peel strength.
As a sealing method, other than heat fusion, a method using high frequency or ultrasonic waves is also possible.
プラスティック容器はシート成型により製造される。シート素材はポリエチレン、ポリプロピレン等のポリオレフィン、ポリカーボネート、ポリスチレン等特に限定はないが、ポリオレフィン系が好ましい。又、少量の合成ゴム成分を配合することが好ましい。容器の大きさにより異なるが、２００〜１０００μｍ厚のプラスティックシートをシート成型したものであるため、凸状突条６の厚さははるかに薄くなり、側板上端３の位置のバラツキも容易に吸収される。 Plastic containers are manufactured by sheet molding. The sheet material is not particularly limited, such as polyolefins such as polyethylene and polypropylene, polycarbonate, polystyrene, etc., but polyolefins are preferable. Moreover, it is preferable to mix | blend a small amount of synthetic rubber components. Although it varies depending on the size of the container, since the plastic sheet having a thickness of 200 to 1000 μm is formed into a sheet, the thickness of the convex ridge 6 becomes much thinner, and the variation in the position of the upper end 3 of the side plate is easily absorbed. The
オーバーラップフィルム８はプラスティック容器１の素材、特に凸状突条６の素材と熱融着容易で、易剥離性の素材であると共に、輸送に耐える強度を要する。一般に、ポリアミド、ポリエステル、ポリプロピレン等の高強度フィルムを基材とし、この基材に易剥離性フィルムを積層する。易剥離性フィルム素材としては、エチレン−酢酸ビニル共重合体系、線状低密度ポリエチレン系、ポリスチレン分散ポリエチレン系等があるが、特に限定するものではない。容器開封時、人手にて容易に開封することが可能であり、容器輸送、荷扱中での容器からの漏水を防止できればよい。 The overlap film 8 is easily heat-bonded to the material of the plastic container 1, particularly the material of the convex protrusion 6, is an easily peelable material, and requires strength to withstand transportation. In general, a high-strength film such as polyamide, polyester, or polypropylene is used as a base material, and an easily peelable film is laminated on the base material. Examples of the easily peelable film material include, but are not particularly limited to, an ethylene-vinyl acetate copolymer system, a linear low density polyethylene system, and a polystyrene dispersed polyethylene system. It is only necessary that the container can be easily opened manually when the container is opened, and water leakage from the container during container transportation and handling can be prevented.
オーバーラップフィルム８の厚さは３０〜１００μｍであり、基材フィルムと易剥離性フィルムの他に、他の素材の層を介在させてもよい。
複合段ボール容器輸送中に漏水や気密性喪失のおそれがなく、使用時、人手で容易に開封できるためには、剥離強度が５〜９Ｎ／１５ｍｍ幅、好ましくは６〜８Ｎ／１５ｍｍ幅である。剥離強度が５Ｎ／１５ｍｍ幅未満であると、輸送中に漏水するおそれがあり、９Ｎ／１５ｍｍ幅を超えると、使用時、人手で容易に開封し難い。
The thickness of the overlap film 8 is 30 to 100 μm, and other material layers may be interposed in addition to the base film and the easily peelable film.
The peel strength is 5 to 9 N / 15 mm width, preferably 6 to 8 N / 15 mm width so that there is no risk of water leakage or loss of airtightness during transportation of the composite corrugated cardboard container, and it can be easily opened by hand during use. If the peel strength is less than 5 N / 15 mm width, water may leak during transportation. If the peel strength exceeds 9 N / 15 mm width, it is difficult to open easily by hand during use.
図４には、内容物を装入した複合段ボール容器に、オーバーラップフィルム８を熱融着するフィルム融着機の１例を示した。
ロールに巻回されたオーバーラップフィルム８は巻出されてガイドロール１０、テンションロール１１を通過して密封すべき複合段ボール容器の上方に至る。内容物を装入した複合段ボール容器は、容器リフター１３により所定の位置で待機している。オーバーラップフィルム８はフィルム押さえシリンダー１４とフィルム引出チャック１６との間で緊張状態で、段ボール複合容器上に保持されている。熱融着板９は内容物を装入した複合段ボール容器の真上でオーバーラップフィルム８を介して対峙している。この状態で熱融着用シリンダー１２が下降する。このとき、段ボール容器１の側板を受台として熱せられた熱融着板９の先端で凸状突条６が押圧され融着される。次いで、フィルムカッター１５が下降し、オーバーラップフィルム８を切断する。密封された複合段ボール容器は容器排出シリンダー１７により排出され、新たに密封すべき複合段ボール容器が所定の位置に待機する。
FIG. 4 shows an example of a film fusing machine for heat fusing the overlap film 8 to the composite corrugated cardboard container charged with the contents.
The overlap film 8 wound around the roll is unwound and passes through the guide roll 10 and the tension roll 11 and reaches above the composite corrugated container to be sealed. The composite corrugated cardboard container charged with the contents stands by at a predetermined position by the container lifter 13. The overlap film 8 is held on the corrugated cardboard composite container in a tension state between the film pressing cylinder 14 and the film drawing chuck 16. The heat-sealing plate 9 is opposed to the composite corrugated cardboard container filled with the contents via the overlap film 8. In this state, the heat fusion cylinder 12 is lowered. At this time, the convex protrusion 6 is pressed and fused at the tip of the heat-sealing plate 9 heated with the side plate of the cardboard container 1 as a cradle. Next, the film cutter 15 descends and cuts the overlap film 8. The sealed composite cardboard container is discharged by the container discharge cylinder 17, and a new composite cardboard container to be sealed waits at a predetermined position.
図２に示す如く、耐水原紙を用いた段ボール厚みが５ｍｍの耐圧構造の段ボール容器１に厚さ５００μｍで少量のゴムを配合した無延伸ポリプロピレンシートをシート成形して得られたプラスティック容器４を一体に装入した。
プラスティック容器４の内部に氷６ｋｇと水３ｋｇを装入し、オーバーラップフィルム８をプラスティック容器４の開口部に被せ、図４に示したフィルム融着機を用いて熱融着した。オーバーラップフィルム８は１５μｍ厚のポリアミドを基材とし、３０μｍ厚のエチレン−酢酸ビニル系易開封性フィルムを積層してなる。この際の融着板の温度は１５０℃、熱融着時間３秒、熱融着圧力３ｋｇ／ｃｍ2 であった。補強された段ボール容器の４側面に直立する側板は受台として機能した。
As shown in FIG. 2, a plastic container 4 obtained by sheet-molding an unstretched polypropylene sheet having a thickness of 500 μm and a small amount of rubber compounded into a corrugated cardboard container 1 having a pressure-resistant structure having a corrugated board thickness of 5 mm using water-resistant base paper. I was charged.
The plastic container 4 was charged with 6 kg of ice and 3 kg of water, and the overlap film 8 was placed on the opening of the plastic container 4 and heat-sealed using the film fusing machine shown in FIG. The overlap film 8 is made of a 15 μm thick polyamide as a base material, and a 30 μm thick ethylene-vinyl acetate easy-open film is laminated. The temperature of the fusion plate at this time was 150 ° C., the heat fusion time was 3 seconds, and the heat fusion pressure was 3 kg / cm 2 . Side plates standing upright on the four sides of the reinforced cardboard container functioned as a cradle.
実施例１で得られた密封複合段ボール容器はプラスティック容器４の凸状突条６が押しつぶされ、上フランジ５はオーバーラップフィルム８と均等に熱融着していた。
この容器３個を、高さ８０ｃｍの位置からコンクリートの床に水平落下させたところ、３個とも異常がなかった。更に、５回同様の水平落下を繰返したが、３個共異常がなかった。その後、オーバーラップフィルム８の端部をつまんで引張ったところ、容易に剥離することができた。
剥離強度を測定したところ７．１５Ｎ／１５ｍｍ幅であった。
In the sealed composite corrugated cardboard container obtained in Example 1, the convex protrusions 6 of the plastic container 4 were crushed, and the upper flange 5 was thermally fused evenly with the overlap film 8.
When these three containers were dropped horizontally onto a concrete floor from a position having a height of 80 cm, there was no abnormality in all three containers. Furthermore, the same horizontal drop was repeated five times, but there was no abnormality in all three. Then, when the edge part of the overlap film 8 was pinched and pulled, it was able to peel easily.
The peel strength was measured and found to be 7.15 N / 15 mm width.
内容物として、生いわしを氷水と共に、本発明段ボール複合容器に装入し、図５に示すように包装して、山形県から東京都までトラック輸送した。生いわしは充分な鮮度を保持していた。図５中、１８は段ボール製蓋、１９は氷水を含む内容物であり、２０は蓋と容器を結紮する結紮紐である。 As contents, raw sardines were placed in the corrugated cardboard composite container of the present invention together with ice water, packaged as shown in FIG. 5, and transported by truck from Yamagata Prefecture to Tokyo. The raw sardines maintained a sufficient freshness. In FIG. 5, 18 is a cardboard lid, 19 is a content containing ice water, and 20 is a ligature string for ligating the lid and the container.
１ 段ボール容器
２、２' 補強段ボール紙
３ 側板上端
４ プラスティック容器
５ 上フランジ
６ 凸状突条
７ ズレ防止縁
８ オーバーラップフィルム
９ 熱融着板
１０ ガイドロール
１１ テンションロール
１２ 熱融着用シリンダー
１３ 容器リフター
１４ フィルム押さえシリンダー
１５ フィルムカッター
１６ フィルム引出チャック
１７ 容器排出シリンダー
１８ 段ボール製蓋
１９ 氷水を含む内容物
２０ 結束紐
DESCRIPTION OF SYMBOLS 1 Corrugated-cardboard container 2, 2 'Reinforcement corrugated paper 3 Side board upper end 4 Plastic container 5 Upper flange 6 Convex protrusion 7 Displacement prevention edge 8 Overlap film 9 Heat-bonding board 10 Guide roll 11 Tension roll 12 Hot-melting cylinder 13 Container Lifter 14 Film holding cylinder 15 Film cutter 16 Film draw chuck 17 Container discharge cylinder 18 Corrugated cardboard lid 19 Contents 20 containing ice water Tying string
Claims (5)
シート成形され、上記段ボール容器（１）の側板上端（３）を覆う上フランジ（５）及び該上フランジ（５）から延出したズレ防止縁（７）を有し、上フランジ（５）には凸状突条（６）が突出しているプラスティック容器（４）を、段ボール容器（１）の側板上端（３）上にプラスティック容器（４）の上フランジ（５）が位置するように一体に装入した、段ボール複合容器に、
農水産物及び氷を装入し、
段ボール複合容器を水平面上に置き、その上面の開口部をオーバーラップフィルム（８）で覆い、その上から、上記段ボール複合容器の直立する側板を受台とし、段ボール複合容器の上端と一致する形状の熱融着板で押圧して前記凸状突条（６）とオーバーラップフィルム（８）とを熱融着させ、更に段ボール製の蓋を被せてなることを特徴とする密封された段ボール複合容器。 Inside the cardboard container (1) whose side walls are reinforced with other corrugated paper ,
The upper flange (5) is formed into a sheet and has an upper flange (5) that covers the upper end (3 ) of the side plate of the cardboard container (1) , and a misalignment prevention edge (7) extending from the upper flange (5). The plastic container (4) from which the convex ridge (6) protrudes is integrated so that the upper flange (5) of the plastic container (4) is positioned on the upper end (3) of the corrugated cardboard container (1). In the cardboard composite container,
Agricultural marine products and ice
Place the corrugated cardboard composite container on a horizontal surface, cover the opening on the upper surface with an overlap film (8), and form a shape that matches the upper end of the corrugated cardboard composite container from above by using the upright side plate of the corrugated cardboard composite container cardboard of pressing with heat Chakuban heat sealed overlapping film and (8) and said convex ridges (6), sealed further characterized Rukoto such covered with a cardboard lid Composite container.
シート成形され、上記段ボール容器（１）の側板上端（３）を覆う上フランジ（５）及び該上フランジ（５）から延出したズレ防止縁（７）を有し、上フランジ（５）には凸状突条（６）が突出しているプラスティック容器（４）を、段ボール容器（１）の側板上端（３）上にプラスティック容器（４）の上フランジ（５）が位置するように一体に装入した、段ボール複合容器に、
農水産物及び氷を装入し、
段ボール複合容器を水平面上に置き、その上面の開口部をオーバーラップフィルム（８）で覆い、その上から、上記段ボール複合容器の直立する側板を受台とし、段ボール複合容器の上端と一致する形状の熱融着板で押圧して前記凸状突条（６）とオーバーラップフィルム（８）とを熱融着させ、更に段ボール製の蓋を被せることを特徴とする密封された段ボール複合容器の製造方法。 Inside the cardboard container (1) whose side walls are reinforced with other corrugated paper,
The upper flange (5) is formed into a sheet and has an upper flange (5) that covers the upper end (3) of the side plate of the cardboard container (1), and a misalignment prevention edge (7) extending from the upper flange (5). The plastic container (4) from which the convex ridge (6) protrudes is integrated so that the upper flange (5) of the plastic container (4) is positioned on the upper end (3) of the corrugated cardboard container (1). In the cardboard composite container,
Agricultural marine products and ice
Place the corrugated cardboard composite container on a horizontal surface, cover the opening on the upper surface with an overlap film (8), and form a shape that matches the upper end of the corrugated cardboard composite container from above by using the upright side plate of the corrugated cardboard composite container A sealed corrugated cardboard composite container characterized in that the convex protrusion (6) and the overlap film (8) are heat-sealed by pressing with a heat-sealing plate, and further covered with a cardboard lid. Production method.
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