JP2008222244A - Cup-shaped paper container, and its manufacturing method - Google Patents
Cup-shaped paper container, and its manufacturing method Download PDFInfo
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本発明は、カップ状紙容器とその製造方法に関するものであり、特に、段差が小さいフランジ部を有するカップ紙状容器とその製造方法に関する。 The present invention relates to a cup-shaped paper container and a method for manufacturing the same, and particularly relates to a cup-shaped paper container having a flange portion with a small step and a method for manufacturing the same.
ジュース等の飲料を充填し、上部の開口部を蓋材で密封して使用するカップ状紙容器は、紙を基材とし、両面にポリエチレン等の熱可塑性樹脂層を設けた積層材料を所定の形状としたブランクを、胴部に接合部を設けて成形したカップ状紙容器が一般的であった。 A cup-shaped paper container that is filled with beverages such as juice and the upper opening is sealed with a lid material. A laminated material that uses paper as a base material and is provided with a thermoplastic resin layer such as polyethylene on both sides is specified. The cup-shaped paper container which shape | molded the blank made into the shape by providing the junction part in the trunk | drum was common.
また、バリア性を必要とする場合、前記胴部の積層材料として、例えば、表側から、ポリエチレン／紙基材／ポリエチレン／アルミニウム箔／ポリエチレンテレフタレートフィルム／ポリエチレン、またはポリエチレン／紙基材／ポリエチレン／金属酸化物蒸着層を有するプラスチックフィルム／ポリエチレンを用い、成形していた。 Moreover, when barrier property is required, as a laminated material of the said trunk | drum, for example, from the front side, polyethylene / paper base material / polyethylene / aluminum foil / polyethylene terephthalate film / polyethylene or polyethylene / paper base material / polyethylene / metal A plastic film / polyethylene having an oxide deposited layer was used for molding.
そして、カップ状紙容器の接合部のバリア性を確保するため、例えば、カップ状紙容器の胴部を構成する胴部材の接合部の内側は、先端から所定の長さだけ、積層シートの厚みの半分を削除（スカイブ）し、削り取った残りの半分を削除面が内側になるように折り返し（ヘミング）、紙基材の端面が露出しないようにして保護を行っている。 And in order to ensure the barrier property of the joint part of the cup-shaped paper container, for example, the inside of the joint part of the body member constituting the body part of the cup-shaped paper container is a predetermined length from the tip, and the thickness of the laminated sheet Are removed (skived), and the remaining half of the shavings are folded back (hemming) so that the deleted surface is on the inside, thereby protecting the end face of the paper substrate from being exposed.
しかしながら、上述の紙基材の端面を、スカイブヘミング加工を行うためには、あらかじめ打ち抜いたブランクをカップ状紙容器に成形する前に、前記ブランクの側端縁を、特別の機械を用いてスカイブヘミング加工をする必要がる。そのため複雑な加工工程を経ねばならず、また、紙を削除することによる紙粉発生があり、その改善が要望されていた。 However, in order to perform a skive hemming process on the end face of the paper substrate, the side edge of the blank is skived by using a special machine before forming a blank blank into a cup-shaped paper container. Hemming is required. For this reason, complicated processing steps have to be taken, and paper dust is generated by deleting the paper, which has been desired to be improved.
スカイブヘミング加工を行わずにバリア性に優れたカップ状紙容器を作製する方法として、紙基材の端面がフィルムで覆われたブランクを用い、カップ状紙容器を製造する方法が提案されている（例えば、特許文献１参照）。 As a method for producing a cup-shaped paper container excellent in barrier properties without performing skive hemming, a method for producing a cup-shaped paper container using a blank in which the end surface of a paper substrate is covered with a film has been proposed. (For example, refer to Patent Document 1).
しかし、この紙基材の端面を保護したバリア性を有するカップ状紙容器においては、胴部貼り合わせ部の内側の端縁は、全体にわたって熱可塑性樹脂層が紙基材から延出して作製されている。このように、紙基材から延出した熱可塑性樹脂層のフィルムは、カップ成形する際に，不規則に成形されてしまい、本来の目的である紙基材の端面を十分に被覆することができなかった。 However, in the cup-shaped paper container having a barrier property that protects the end surface of the paper base material, the inner edge of the body portion bonding portion is produced by extending the thermoplastic resin layer over the entire paper base material. ing. As described above, the film of the thermoplastic resin layer extending from the paper base material is irregularly formed when the cup is formed, and the end surface of the paper base material which is the original purpose can be sufficiently covered. could not.
また、カップ状容器としての仕上がりが悪く、外観的に不具合が生じてしまう等の問題がある。 In addition, there is a problem that the finish as a cup-shaped container is poor and defects in appearance occur.
また、スカイブ端面を一直線上にそろえるため、カップ成形機でスカイブヘミング加工をすると同時にカップ成形をすることは困難であった。 In addition, since the skive end faces are aligned, it is difficult to perform cup molding simultaneously with skive hemming with a cup molding machine.
さらに、カップ状紙容器は、開口部に胴部材の上端縁部を１周以上巻き込んでフランジ部が形成されている。このように、開口部にフランジ部を設けることにより、外側から力が加わった場合でも、紙容器の変形を抑えることができる。 Furthermore, the cup-shaped paper container has a flange portion formed by winding the upper end edge of the body member one or more times in the opening. Thus, by providing a flange part in an opening part, even when a force is added from the outside, a deformation | transformation of a paper container can be suppressed.
そして、このフランジ部は強度も十分であり、このフランジ部の上面に蓋材を重ね、密封することができる。 And this flange part has sufficient intensity | strength, a cover material can be piled up on the upper surface of this flange part, and it can seal.
また、前記蓋材を密封しやすくするため、前記フランジ部を上下方向から加圧し、扁平状態にすることが行われている。この扁平にする手段は、加熱加圧手段、超音波手段により行われる。
前記のように、開口部に胴部材の上端縁部を巻き込んでフランジ部が形成されたカップ状容器は、前記フランジ部で、基材の紙の厚みによる段差が生じる。そのため、前記フランジ部の上面に蓋材を重ね、そのまま加熱シールした場合、前記段差により密封が確実に行うことができなかった。特に、前記フランジ部が扁平状態の場合、前記基材の厚みによる影響が大きかった。 As described above, in the cup-shaped container in which the upper end edge portion of the trunk member is wound around the opening and the flange portion is formed, a step due to the thickness of the base paper is generated in the flange portion. For this reason, when a lid is placed on the upper surface of the flange portion and heat-sealed as it is, sealing cannot be reliably performed by the step. In particular, when the flange portion is in a flat state, the influence of the thickness of the base material was large.
また、前記密封を確実に行うために、前記フランジ部の上面の段差を埋めるため、別の樹脂等からなる充填部材を設け、段差を解消する。 Moreover, in order to perform the said sealing reliably, in order to fill the level | step difference of the upper surface of the said flange part, the filling member which consists of another resin etc. is provided, and a level | step difference is eliminated.
前記段差部の位置の密封シールを、部分的に行なわなければならなかった。 The sealing of the position of the step portion had to be performed partially.
本発明は、開口部に胴部材を巻き込んでフランジ部が形成されているカップ状容器、特に、扁平状態のフランジ部が形成されているカップ状容器で、蓋材の密封が容易で、かつ、密封性が優れたカップ状容器を提供することを目的とする。 The present invention is a cup-shaped container having a flange portion formed by winding a body member into an opening, particularly a cup-shaped container in which a flat flange portion is formed, and the sealing of the lid is easy, and An object of the present invention is to provide a cup-shaped container having excellent sealing properties.
また、上記機能に加えて、バリア性が優れた機能を有するカップ状容器を提供することを目的とする。 Another object of the present invention is to provide a cup-shaped container having a function with excellent barrier properties in addition to the above function.
重ね合わせ部の内側に位置する側端縁は、延出した熱可塑性樹脂層からなる樹脂部フィルムがはみだして形成されている胴部材を用いて、バリア性に優れた容器を成形する際に発生する以上のような問題に鑑みてなされたもので、紙基材端面の被覆に支障をきたさず、かつ、紙カップとしての仕上がり、外観の綺麗なバリア性を有する紙カップ等の紙容器と該紙カップや紙容器を連続状の紙基材から、直接紙カップや紙容器にする紙容器と紙カップの製造方法を提供することを課題とする。 The side edge located inside the overlapped part is generated when a container with excellent barrier properties is formed using a body member that is formed by protruding a resin part film consisting of an extended thermoplastic resin layer. In view of the above problems, paper containers such as paper cups and the like that do not interfere with the coating of the end face of the paper base material, have a finished appearance as a paper cup, and have a beautiful barrier property, and the paper cup, It is an object of the present invention to provide a paper container and a paper cup manufacturing method in which the paper container is made directly from a continuous paper base material into a paper cup or paper container.
本発明は、少なくとも内面に熱可塑性樹脂層が設けられた紙を基材とする積層シートから構成されたブランクの、一方の側端縁を他方の側端縁に重ね合わせて胴部貼り合わせ部、および上端縁を１周以上巻き込み、フランジ部を形成させた筒状の胴部材と、該胴部材の下部に底部材を一体化したカップ状紙容器において、
前記ブランクの重ね合わせ部の内側に位置する側端縁は、前記基材の側端縁から延出する樹脂部を有し、かつ、両側端縁上部にそれぞれ切欠き部を設けたことを特徴とするカップ状紙容器である。
The present invention provides a body-laminated portion in which one side edge is overlapped with the other side edge of a blank composed of a paper-based laminated sheet having at least an inner surface provided with a thermoplastic resin layer. In a cup-shaped paper container in which the upper end edge is wound around one or more rounds, and a cylindrical body member in which a flange portion is formed, and a bottom member is integrated with the lower part of the body member,
The side edge located inside the overlapping part of the blank has a resin part extending from the side edge of the base material, and a notch is provided in each upper part of both side edges. It is a cup-shaped paper container.
ここで、前記内面に設けられた熱可塑性樹脂層を、ガスバリア性層が含まれた構成とすることにより、内容物の保存性が優れたカップ状紙容器が得られる。 Here, by making the thermoplastic resin layer provided on the inner surface include a gas barrier layer, a cup-shaped paper container having excellent storage stability of the contents can be obtained.
また、 前記樹脂部を、前記基材の外面側に折り返した構成とすることにより、胴部貼り合わせ部の樹脂量が確保でき、さらに、ガスバリア層を含む熱可塑性樹脂層の場合、前記ガスバリア層の端面が露出しないカップ状紙容器が得られる。 In addition, the resin portion is configured to be folded back to the outer surface side of the base material, so that the resin amount of the body bonded portion can be secured, and in the case of a thermoplastic resin layer including a gas barrier layer, the gas barrier layer A cup-shaped paper container is obtained in which the end face is not exposed.
前記樹脂部は、前記基材の厚み以上、好ましくは、前記ブランクの厚み以上の幅を有することが好ましい。 The resin portion preferably has a width equal to or greater than the thickness of the base material, preferably equal to or greater than the thickness of the blank.
また、 前記樹脂部の長さは、少なくともブランクの上端縁を巻き込んで形成したフランジ部の上面の相当する部分に有する構成とするカップ状紙容器である。 Moreover, the length of the said resin part is a cup-shaped paper container made into the structure which has in the part corresponding to the upper surface of the flange part formed by winding at least the upper end edge of a blank.
また、前記樹脂部を、側端縁の全長に設けることで、フランジ部以外の胴部貼り合わせ部の密封性の優れたカップ状紙容器が得られる。 Further, by providing the resin part over the entire length of the side edge, it is possible to obtain a cup-shaped paper container excellent in sealing performance of the body part bonding part other than the flange part.
また、前記樹脂部は、前記切欠き部を含む箇所に設けることで、フランジ部の密封性がさらに優れたカップ状紙容器が得られる。 Moreover, the said resin part is provided in the location containing the said notch part, and the cup-shaped paper container in which the sealing performance of the flange part was further excellent is obtained.
また、本発明は、前記樹脂部を、胴部材を形成するブランクの熱可塑性樹脂層により形成した、胴部材を形成するブランクの熱可塑性樹脂層以外の別部材により形成した、または、胴部材を形成するブランクの熱可塑性樹脂層と、前記ブランクの熱可塑性樹脂層以外の別部材とにより形成した、いずれかの構成からなるカップ状紙容器である。 Moreover, this invention formed the said resin part with another members other than the thermoplastic resin layer of the blank which forms the trunk member, formed with the thermoplastic resin layer of the blank which forms a trunk member, or the trunk member It is the cup-shaped paper container which consists of a thermoplastic resin layer of the blank to form and another member other than the thermoplastic resin layer of the said blank, and consists of either structure.
また、本発明は、前記切欠き部は、それぞれ異なる形状とすることで、フランジ部の段差を解消したカップ状紙容器である。 Moreover, this invention is a cup-shaped paper container which eliminated the level | step difference of the flange part by making the said notch part into a respectively different shape.
また、本発明は、前記切欠き部を、樹脂部を設けた側端部の切欠き部の幅が、他方の側端部の切欠き部の幅より大きく、または、樹脂部を設けた側端縁の切欠き部の高さが、他方の側端縁の切欠き部の高さより小さくすることで、フランジ部の段差を解消したカップ状紙容器である。 Further, according to the present invention, the width of the cutout portion at the side end portion provided with the resin portion is larger than the width of the cutout portion at the other side end portion, or the side provided with the resin portion. In the cup-shaped paper container, the step of the flange portion is eliminated by making the height of the cutout portion of the edge smaller than the height of the cutout portion of the other side edge.
また、本発明は、前記切欠き部を、三角形状としたカップ紙状容器である。 Moreover, this invention is a cup paper-shaped container which made the said notch part triangular shape.
また、本発明は、前記フランジ部は、上面が平坦状態し、蓋材の密封を確実にしたカップ状紙容器である。 Further, the present invention is the cup-shaped paper container in which the flange portion has a flat upper surface and the lid member is securely sealed.
本発明は、少なくとも内面に熱可塑性樹脂層が設けられた紙を基材とする積層シートを所定の形状に打ち抜きブランクを形成する打ち抜き工程と、
前記ブランクの、一方の側端縁に外方に延出する樹脂部を形成する樹脂部形成工程と、
前記ブランクの、両側端縁上部に切欠き部を設ける切欠き部形成工程と、
前記ブランクの樹脂部を形成した側端縁を、他方の側端縁の内側となるように重ね合わせ、密着する胴部貼り合わせ部を形成する胴部形成工程と、
前記胴部下部に、少なくとも内面に熱可塑性樹脂層が設けられた紙を基材とする積層シートを所定の形状に打ち抜いた底部材を一体化する底部形成工程と、
前記胴部上端縁を１周以上巻き込み、フランジ部を形成するフランジ部形成工程と、
を有することを特徴とするカップ状紙容器の製造方法である。
The present invention includes a punching step of punching a laminated sheet having a paper base material provided with a thermoplastic resin layer on at least an inner surface into a predetermined shape, and a blank,
A resin part forming step of forming a resin part extending outwardly on one side edge of the blank; and
The blank, notch portion forming step of providing a notch portion on both upper edges,
The body part forming step of forming the body part bonding part that overlaps and closely adheres the side edge forming the resin part of the blank to the inside of the other side edge;
A bottom portion forming step of integrating a bottom member formed by punching a laminated sheet having a base material made of paper having at least an inner surface provided with a thermoplastic resin layer into the lower portion of the body portion;
A flange portion forming step of winding the upper end edge of the body portion one or more times to form a flange portion;
It is a manufacturing method of the cup-shaped paper container characterized by having.
さらに、前記樹脂層を基材の外側に折り返す、折り返し工程を有することを特徴とするカップ状紙容器の製造方法である。 Furthermore, it is a manufacturing method of the cup-shaped paper container characterized by having the folding process which folds the said resin layer to the outer side of a base material.
本発明は、さらに、前記巻き込んだフランジ部上面を平坦にする平坦化工程を有することを特徴とするカップ状紙容器の製造方法である。 The present invention further provides a method for producing a cup-shaped paper container, further comprising a flattening step of flattening the upper surface of the rolled-up flange portion.
また、本発明は、前記平坦化工程が、超音波を用いて行われることを特徴とするカップ状紙容器の製造方法である。 Moreover, this invention is a manufacturing method of the cup-shaped paper container characterized by the said planarization process being performed using an ultrasonic wave.
このように本発明によれば、少なくとも内面に熱可塑性樹脂層が設けられた紙を基材
とする積層シートから構成されたブランクの、一方の側端縁を他方の側端縁に重ね合わせて胴部貼り合わせ部、および上端縁を１周以上巻き込み、フランジ部を形成させた筒状の胴部材と、該胴部材の下部に底部材を一体化したカップ状紙容器において、
前記ブランクの重ね合わせ部の内側に位置する側端縁は、前記基材の側端縁から延出する樹脂部を有し、かつ、両側端縁上部にそれぞれ切欠き部を設けた構成としたので、フランジ部の、前記胴部貼り合わせ部の上面に生じる段差の発生を抑制できるので、蓋材を重ねてそのままシールすることで密封することが可能となった。
Thus, according to the present invention, at least one side edge of a blank composed of a laminated sheet whose base material is a paper having a thermoplastic resin layer provided on the inner surface is overlapped with the other side edge. In the cup-shaped paper container in which the body part laminating part and the upper end edge are wound one or more times, the cylindrical body member in which the flange part is formed, and the bottom member are integrated in the lower part of the body member,
The side edge located inside the overlapped portion of the blank has a resin portion extending from the side edge of the base material, and has a configuration in which a notch portion is provided on each side edge upper portion. Therefore, since the generation | occurrence | production of the level | step difference which arises on the upper surface of the said trunk | drum bonding part of a flange part can be suppressed, it became possible to seal by overlapping a cover material and sealing as it is.
また、本発明によれば、前記巻き込んだフランジ部上面を平坦にしても段差がなく、より確実に蓋材を重ねてそのままシールすることで密封することが可能となった。 Further, according to the present invention, there is no step even when the upper surface of the rolled-up flange portion is flattened, and it is possible to seal by overlapping the lid material more securely and sealing it as it is.
また、前記熱可塑性樹脂層を、ガスバリア性層が含まれた構成とすることにより、基材の内面側が保護され、ガスバリア性が確保されるので、内容物の保存性が優れたカップ状紙容器とすることができる。 In addition, since the thermoplastic resin layer is configured to include a gas barrier layer, the inner surface side of the base material is protected and the gas barrier property is secured, so that the cup-shaped paper container having excellent storage stability of the contents It can be.
また、 前記樹脂部を、前記基材の外面側に折り返した構成とすることにより、胴部貼り合わせ部の樹脂量が確保でき、胴部貼り合わせ部に段差が生じなく、さらに、ガスバリア層を含む熱可塑性樹脂層の場合、前記ガスバリア層の端面が、紙容器内部に露出しないカップ状紙容器とすることができる。 Moreover, by making the resin part folded back to the outer surface side of the base material, it is possible to ensure the resin amount of the body part bonding part, no step is generated in the body part bonding part, and further, the gas barrier layer In the case of the thermoplastic resin layer to be included, the end face of the gas barrier layer can be a cup-shaped paper container that is not exposed inside the paper container.
本発明を一実施形態に基づいて以下に詳細に説明する。 The present invention will be described in detail below based on one embodiment.
本発明の紙カップは、例えば、少なくとも内側面に熱可塑性樹脂層（４０）が設けられた紙を基材（１）とする積層シート（３）から構成されている。 The paper cup of this invention is comprised from the laminated sheet (3) which uses as a base material (1) the paper by which the thermoplastic resin layer (40) was provided in the inner surface at least, for example.
図１に示すように、胴部材（１８）は、両側端縁上部にそれぞれ切欠き部（３１）（３２）を設けた胴部材ブランク（１０）の、一方の端縁（１１）をもう一方の端縁（１２）に重ね合わせて胴部貼り合わせ部（１５）を形成させて円筒形状とする。 As shown in FIG. 1, the body member (18) has one end edge (11) on the other end of the body member blank (10) provided with notches (31) and (32) at the upper ends of both side edges. The body part bonding part (15) is formed so as to overlap with the end edge (12) of the cylinder to form a cylindrical shape.
また、底部材（２０）は、円形状で、下向きに起立させた周縁部（２１）を有する。 Further, the bottom member (20) is circular and has a peripheral edge portion (21) erected downward.
そして、前記胴部材（１８）の下部内面に、底部材（２０）の周縁部（２１）の外面を接合させる。 And the outer surface of the peripheral part (21) of a bottom member (20) is joined to the lower inner surface of the said trunk | drum member (18).
さらに周縁部（２１）を覆うように、前記胴部材（１８）の下端縁部を内方に折り曲げ、底部材の周縁部（２１）内面に接合させて環状脚部（２２）を形成させる。 Further, the lower end edge portion of the body member (18) is bent inward so as to cover the peripheral edge portion (21) and joined to the inner surface of the peripheral edge portion (21) of the bottom member to form the annular leg portion (22).
一方、胴部材の上部周縁を外方に、１周以上巻き込み、フランジ部（１６）を形成させたカップ状紙容器である。 On the other hand, it is a cup-shaped paper container in which the upper peripheral edge of the body member is wound outward one or more times to form a flange portion (16).
なお、このような構造は、テーパー状のカップ状紙容器に限定されず、円筒状のカップ状紙容器であっても同様である。 Such a structure is not limited to a tapered cup-shaped paper container, and the same applies to a cylindrical cup-shaped paper container.
そして、図２に示すように、胴部材ブランク（１０）は、一方の端縁（１１）が、少なくとも内面側の熱可塑性樹脂層（４０）が、紙基材（１）の側端縁より外方に延出した樹脂部（４ａ）が形成されている。 And as shown in FIG. 2, as for a trunk | drum member blank (10), one edge (11) has the thermoplastic resin layer (40) of the inner surface side at least from the side edge of a paper base material (1). A resin portion (4a) extending outward is formed.
この樹脂部（４ａ）は、基材（１）の端部から外方に延出しただけでなく、図３に示すように、基材（１）の近傍で、基材（１）の外面側に折り返した折り返し樹脂部（４ｂ）
構成とすることが好ましい。このように、樹脂部（４ｂ）は、基材（１）の外面側に折り返した構成とすることで、貼り合わせ部（１５）における樹脂量が確保でき、貼り合わせ部の密封性が良好となる。
The resin portion (4a) not only extends outward from the end of the base material (1), but also as shown in FIG. 3, in the vicinity of the base material (1), the outer surface of the base material (1). Folded resin part folded back (4b)
A configuration is preferable. Thus, the resin part (4b) is configured to be folded back to the outer surface side of the base material (1), so that the amount of resin in the bonded part (15) can be secured, and the sealing property of the bonded part is good. Become.
また、前記樹脂部は、前記基材の厚み以上、好ましくは、前記ブランクの厚み以上の幅を有することが好ましい。 Moreover, it is preferable that the said resin part has the width | variety more than the thickness of the said base material, Preferably, it is more than the thickness of the said blank.
ここで、前記樹脂層について、ブランクの一方の側端縁の設ける例について説明したが、両側端縁に設ける構成にしてもよい。 Here, although the example which provides the one side edge of a blank was demonstrated about the said resin layer, you may make it the structure provided in a both-sides edge.
このような構造を有している本発明のカップ状紙容器は、胴部貼り合わせ部（１５）の内側に位置する紙基材の端面が、樹脂部（４ａ）または折り返し樹脂部（４ｂ）で保護されているので、容器に充填された内容物が紙基材端面から浸透することがない。 In the cup-shaped paper container of the present invention having such a structure, the end surface of the paper base material positioned inside the body portion bonding portion (15) has a resin portion (4a) or a folded resin portion (4b). Therefore, the contents filled in the container do not penetrate from the end face of the paper base material.
ここで、前記熱可塑性樹脂層（４０）は、図４（ａ）に示すように、内面側だけでなく、外面側にも設けた構成としてもよい。このように、紙基材の両面に熱可塑性樹脂層（４０）（４１）を設けることにより、基材端面に形成される樹脂部（４ａ）が、前記両面の熱可塑性樹脂層（４０）（４１）が外縁で一体化された状態で形成される。 Here, as shown in FIG. 4A, the thermoplastic resin layer (40) may be provided not only on the inner surface side but also on the outer surface side. Thus, by providing the thermoplastic resin layers (40) and (41) on both sides of the paper substrate, the resin part (4a) formed on the end surface of the substrate becomes the thermoplastic resin layers (40) (40) ( 41) is formed in an integrated state at the outer edge.
また、前記樹脂部は、基材に設けた熱可塑性樹脂層で形成する以外、図５（ａ）に示すように、別の部材、例えば、テープ（５０）（５１）を基材の端部に設け、前述と同様に、外縁で一体化した構成でもよい。 Further, the resin portion is formed by a thermoplastic resin layer provided on the base material, and another member, for example, a tape (50) (51) is attached to the end portion of the base material as shown in FIG. It may be provided in the same manner as described above and integrated at the outer edge.
また、図６（ａ）に示すように、一方を紙基材に設けた熱可塑性樹脂層（４０）を用い、他方をテープ（５０）とし、前述と同様外縁で一体化した樹脂部（４ａ）でもよい。 Further, as shown in FIG. 6 (a), a resin part (4a) integrated with an outer edge in the same manner as described above, using a thermoplastic resin layer (40) provided on one paper base and the other as a tape (50). )
さらに、前記樹脂部（４ａ）は、前述のように紙基材の端縁から外方に延出した構成であれば目的を達成することができる。好ましくは、単に外方に延出した構成ではなく、図４（ｂ）、図５（ｂ）、図６（ｂ）に示すように、前記延出した樹脂部（４ａ）を、紙基材の外面側に折り返した折り返し樹脂部（４ｂ）の構成とする。 Furthermore, if the resin part (4a) is configured to extend outward from the edge of the paper base as described above, the object can be achieved. Preferably, instead of simply extending outward, as shown in FIGS. 4 (b), 5 (b), and 6 (b), the extended resin portion (4a) is used as a paper base material. The folded resin portion (4b) is folded back to the outer surface side.
このように、樹脂部を基材の外面側に折り返した、折り返し樹脂部（４ｂ）の構成とすることによって、胴部貼り合わせ部の段差が、前記折り返し樹脂部（４ｂ）で埋まり、段差のない構成とすることができるうえ、前記折り返し樹脂部（４ｂ）の端面（４ｃ）が紙容器内部に露出しない構成とすることができる。
図７に示すように、胴部材（１８）は、両側端縁上部にそれぞれ三角形状の切欠き部（３１）（３２）を設けた胴部材ブランク（１０）を用いて、図７（ａ）に示すように、樹脂部（４ａ）を設けた側端縁が内側となるように重ね合わせ、加熱加圧により、胴部貼り合わせ部（１５）を形成する。
In this way, by forming the folded resin portion (4b) by folding the resin portion to the outer surface side of the base material, the step of the body bonded portion is filled with the folded resin portion (4b), In addition, the end surface (4c) of the folded resin portion (4b) can be configured not to be exposed inside the paper container.
As shown in FIG. 7, the trunk member (18) uses a trunk member blank (10) provided with triangular notches (31) and (32) at the upper ends of both side edges. As shown in Fig. 5, the body part bonding portion (15) is formed by heating and pressurizing so that the side edge provided with the resin portion (4a) is on the inside.
ここで、前記切欠き部（３１）（３２）の斜辺（３１ａ）（３２ａ）が交差する交点（３３）は、少なくとも前記フランジ部の上面が、前記胴部貼り合わせ部（１５）で形成できるようにする。 Here, at the intersection (33) where the hypotenuses (31a) (32a) of the notches (31) and (32) intersect, at least the upper surface of the flange portion can be formed by the body pasting portion (15). Like that.
以上のような構成とすることにより、前記胴部材（１８）の上部周縁を外方に１周以上巻き込んで、少なくとも３重構成のフランジ部を形成した際、貼り合わせ部においても、基材が、前記貼り合せ部以外の部分と同様の３重構成の巻き込み状態となるので、前記フランジ部に段差が生じない。 By setting it as the above structures, when the upper periphery of the said trunk | drum member (18) is wound outward one or more times and the flange part of at least triple structure is formed, a base material is also in a bonding part. Since the winding state is the same as that of the portion other than the bonded portion, a step is not generated in the flange portion.
また、図８に示すように、フランジ部（１６）上面を平坦にする場合であっても、図７
と同様に、この切欠き部（３１）（３２）の形状を異なる形状とし、前記切欠き部（３１）（３２）の斜辺（３１ａ）（３２ａ）が交差する交点（３３）は、少なくとも前記フランジ部の上面が、前記胴部貼り合わせ部（１５）で形成できるようにすることにより、少なくとも３重構成の平坦な上面を有するフランジ部（１６）であっても、フランジ部上面（１６ａ）に、前記貼り合せ部の位置に生じる段差を解消することができる。
Further, as shown in FIG. 8, even when the upper surface of the flange portion (16) is made flat, FIG.
Similarly, the notches (31) and (32) have different shapes, and the intersection (33) where the hypotenuses (31a) and (32a) of the notches (31) and (32) intersect is at least the above-mentioned By enabling the upper surface of the flange portion to be formed by the body portion bonding portion (15), even if the flange portion (16) has a flat upper surface of at least a triple structure, the upper surface of the flange portion (16a) In addition, the step generated at the position of the bonding portion can be eliminated.
前記熱可塑性樹脂層（２）が、バリア層（２ａ）を含む構成とすることもできる。 The thermoplastic resin layer (2) may include a barrier layer (2a).
このように、バリア層（２ａ）を含む構成とすることにより、紙基材（１）の端面も保護されるので、バリア性に優れたカップ状紙容器とすることができる。 Thus, by setting it as the structure containing a barrier layer (2a), since the end surface of a paper base material (1) is also protected, it can be set as a cup-shaped paper container excellent in barrier property.
また、図９に示すように、樹脂部（４）を折り返した構成とすることで、バリア層（２ａ）の端面が、容器内部に露出しない構成となり、内容物がバリア層と接触ことがないようにすることができ、内容物の保存に悪影響を及ぼさない。 Moreover, as shown in FIG. 9, by setting the resin part (4) to be folded, the end surface of the barrier layer (2a) is not exposed to the inside of the container, and the contents do not come into contact with the barrier layer. And does not adversely affect the preservation of the contents.
このように、折り返し樹脂部（４ｂ）は、樹脂部先端が、基材外面側に折り返した構成となっている。このような構成にすることにより、前記熱可塑性樹脂層（４０）が、異なる材料のバリア層（２ａ）を含む構成であっても、胴部を形成した際、一定の樹脂量が確保でき、紙基材（１）の端面も保護ばかりでなく、胴部貼り合わせ部（１５）の紙基材による段差を解消することができる。 As described above, the folded resin portion (4b) has a configuration in which the front end of the resin portion is folded back toward the outer surface of the substrate. By adopting such a configuration, even when the thermoplastic resin layer (40) includes a barrier layer (2a) made of different materials, a certain amount of resin can be secured when the body portion is formed, In addition to protecting the end surface of the paper substrate (1), the step due to the paper substrate of the body bonding portion (15) can be eliminated.
また、紙基材（１）の外側面にもポリエチレン等の熱可塑性樹脂層（４１）を設け、紙基材の両面に熱可塑性樹脂層（４０）（４１）を設けた構成とすることもできる。 In addition, a thermoplastic resin layer (41) such as polyethylene may be provided on the outer surface of the paper substrate (1), and a thermoplastic resin layer (40) (41) may be provided on both surfaces of the paper substrate. it can.
両面に熱可塑性樹脂層を設けた構成にすることにより、両面の熱可塑性樹脂層（４０）（４１）の先端の内面同士を一体化することで樹脂部（４ａ）を形成することができる。 By adopting a configuration in which the thermoplastic resin layers are provided on both sides, the resin portion (4a) can be formed by integrating the inner surfaces at the tips of the thermoplastic resin layers (40) and (41) on both sides.
特に、両面の熱可塑性樹脂層（４０）（４１）で形成した樹脂部（４ｂ）は、さらに、樹脂部（４ａ）を基材外面側に折り返した構成となっていることで、一定の樹脂量が確保でき、胴部を形成した際、胴部貼り合わせ部（１５）の段差を解消することができる。 In particular, the resin part (4b) formed of the thermoplastic resin layers (40) and (41) on both sides has a structure in which the resin part (4a) is further folded back to the outer surface side of the base material, so that a certain resin The amount can be ensured, and when the body portion is formed, the step of the body portion bonding portion (15) can be eliminated.
また、前記熱可塑性樹脂層（４０）が、異なる材料のバリア層（２ａ）を含む構成であっても、折り返した構成となっていることで、バリア層（２ａ）の端面が、容器内部に露出しない構成となり、内容物がバリア層と接触ことがないようにすることができ、内容物の保存に悪影響を及ぼさない。 Further, even if the thermoplastic resin layer (40) includes a barrier layer (2a) made of different materials, the end surface of the barrier layer (2a) is placed inside the container. It becomes the structure which is not exposed, can prevent a content from contacting a barrier layer, and does not exert a bad influence on preservation | save of a content.
また、外側から水等の液体が付着しても紙基材の剛性が弱くなることがなく、耐水性に優れたカップ状紙容器とすることができる。 Further, even if a liquid such as water adheres from the outside, the rigidity of the paper substrate does not become weak, and a cup-shaped paper container excellent in water resistance can be obtained.
なお、このような構造は、テーパー状のカップ状紙容器に限定されず、円筒状のカップ状紙容器であってもよい。 In addition, such a structure is not limited to a tapered cup-shaped paper container, and may be a cylindrical cup-shaped paper container.
次に、カップ状紙容器の製造方法について、特に、胴部材ブランクの製造方法を含めて説明する。 Next, a method for manufacturing a cup-shaped paper container will be described, particularly including a method for manufacturing a body member blank.
先ず、ロール状の紙基材（１）に扇形状の胴部材ブランク（１０）を複数個並べて割りつけ印刷すると共に、胴部材ブランクの一方の端縁（１１）に、その端縁を含めて外方の部分を長窓（１３）として穿設する（図１０（ａ），（ｂ）参照）〜第１打ち抜き工程。 First, a plurality of fan-shaped body member blanks (10) are arranged and printed on a roll-shaped paper substrate (1), and the end edge is included in one end edge (11) of the body member blank. The outer portion is drilled as a long window (13) (see FIGS. 10A and 10B) to the first punching step.
胴部材ブランク（１０）を印刷して長窓（１３）が穿設された紙基材（１）の内側面、
および外側面にポリエチレン樹脂などの熱可塑性樹脂層（４０）（４１）を溶融樹脂押し出し法により積層して、積層シート（３）を形成させる。この時、基材（１）の長窓部分に、前記２つの熱可塑性樹脂層で樹脂部（４ａ）を形成させる（図１１（ａ），（ｂ）参照）〜熱可塑性樹脂貼り合わせ工程。
An inner surface of the paper substrate (1) printed with the body member blank (10) and provided with a long window (13);
And a thermoplastic resin layer (40) (41) such as polyethylene resin is laminated on the outer surface by a molten resin extrusion method to form a laminated sheet (3). At this time, the resin part (4a) is formed on the long window portion of the base material (1) with the two thermoplastic resin layers (see FIGS. 11A and 11B) to a thermoplastic resin bonding process.
あるいは、胴部材ブランク（１０）を印刷して長窓（１３）が穿設された基材（１）の内側面に、バリア層（２ａ）を有する熱可塑性樹脂層（４０）を、外側面にバリア層を含まない熱可塑性樹脂層（４０）を積層して、積層シート（３）を形成させる。この時、基材の長窓部分に、前記２つの熱可塑性樹脂層で樹脂部（４０（４１））を形成させる（図１１（ａ）（ｂ）参照）〜熱可塑性樹脂貼り合わせ工程。 Alternatively, the thermoplastic resin layer (40) having the barrier layer (2a) is formed on the inner surface of the base material (1) on which the long window (13) is formed by printing the trunk member blank (10), and the outer surface. A thermoplastic resin layer (40) that does not include a barrier layer is laminated to form a laminated sheet (3). At this time, a resin part (40 (41)) is formed on the long window portion of the base material with the two thermoplastic resin layers (see FIGS. 11A and 11B) to a thermoplastic resin bonding step.
前記バリア層（２ａ）としては、アルミニウム箔、アルミニウム蒸着プラスチックフィルム、無機化合物蒸着プラスチックフィルム、エチレン−ポリビニルアルコール共重合体フィルム、ポリエチレンテレフタレートフィルム、ポリアミドフィルムなど、ガスバリア性の優れた材料を使用できる。 As the barrier layer (2a), materials having excellent gas barrier properties such as aluminum foil, aluminum vapor-deposited plastic film, inorganic compound vapor-deposited plastic film, ethylene-polyvinyl alcohol copolymer film, polyethylene terephthalate film, and polyamide film can be used.
前記積層シート（３）の、基材（１）からは、外方に延出して設けられた樹脂部（４ａ）を含む、長窓部分を形成させた側の胴部材ブランク（１０）の不必要部分（１４）を連続してカットする（図１２（ａ），（ｂ）参照）〜スクラップカット工程。 From the base material (1) of the laminated sheet (3), the body member blank (10) on the side where the long window portion is formed, including the resin portion (4a) extending outward is provided. A necessary part (14) is continuously cut (see FIGS. 12A and 12B) to a scrap cutting process.
片側の不必要部分（１４）が切り取られた積層シート（３）から、印刷された複数個の扇形状の胴部材ブランク（１０）を打ち抜き、樹脂部（４ａ）を形成させた一枚ずつの胴部材ブランク（１０）を作製する（第２打ち抜き工程）。 A plurality of printed fan-shaped body member blanks (10) are punched out from the laminated sheet (3) from which the unnecessary part (14) on one side is cut out, and the resin part (4a) is formed one by one. A trunk member blank (10) is produced (second punching step).
このような各工程を経て紙基材（１）より所定幅外方に延出した樹脂部（４ａ）を、一方の側端縁に形成させた胴部材ブランク（１０）を作製することができる。 The trunk member blank (10) in which the resin part (4a) extending outward from the paper base (1) through the respective steps by a predetermined width is formed on one side edge can be produced. .
つぎに、この胴部材ブランク（１０）の樹脂部（４ａ）を、紙基材端面（５）に形成させる方法について、図１３、図１４に沿って説明する。 Next, a method for forming the resin portion (4a) of the body member blank (10) on the paper base end surface (5) will be described with reference to FIGS.
胴部材ブランク（１０）の紙基材（１）より所定幅だけ延出した樹脂層（４ａ）を、紙カップに成形した際の、紙基材（１）の外面側となる側に向けて、櫛状に形成された押さえ突起（Ｄ１１）を具備した第１部材（Ｄ１）を、上方から下方に垂直方向に移動させて略９０°の角度に押し曲げ、仮折りする（図１４（ａ），（ｂ）参照）。 The resin layer (4a) extending by a predetermined width from the paper base (1) of the body member blank (10) is directed toward the outer surface side of the paper base (1) when formed into a paper cup. The first member (D1) having the pressing protrusion (D11) formed in a comb shape is vertically moved from the upper side to the lower side, is pushed and bent at an angle of about 90 °, and is temporarily folded (FIG. 14A). , (B)).
ついで、櫛状に形成された押さえ突起（Ｄ２１）を具備した形成された第２部材（Ｄ２）を、前記第１部材の押さえ突起（Ｄ１１）と押さえ突起（Ｄ１１）の間の間隙（Ｄ１２）を目掛けて、胴部材ブランクの外側方向より内側方向に向けて水平移動させ、樹脂部（４ａ）を略９０°押し曲げ、前記樹脂部層（４ａ）が、折り返し樹脂部（４ｂ）を具備するように、胴部材ブランクの紙基材外側方向に重なるように仮折りする（図１４（ｃ）参照）。 Next, the formed second member (D2) having the pressing protrusion (D21) formed in a comb shape is inserted into the gap (D12) between the pressing protrusion (D11) and the pressing protrusion (D11) of the first member. The resin part (4a) is pushed and bent by approximately 90 °, and the resin part layer (4a) includes a folded resin part (4b). In such a manner, the body member blank is temporarily folded so as to overlap the paper substrate outer side direction (see FIG. 14C).
最後に、第１部材の下側に配置され、櫛状に形成された押さえ突起（Ｄ３１）を具備する第３部材（Ｄ３）を、垂直に上方に押しつけ圧着して、折り返し樹脂部（４ｂ）を胴部材ブランク（１０）の紙基材の外面側に仮接着させる（図１４（ｄ）参照）。 Finally, the third member (D3) provided with the pressing protrusion (D31) formed on the lower side of the first member and having a comb shape is vertically pressed and pressure-bonded, and the folded resin portion (4b) Is temporarily adhered to the outer surface side of the paper base of the body member blank (10) (see FIG. 14D).
なお、第３部材の押さえ突起（Ｄ３１）を適宜の温度に加熱しておくと樹脂部の接着性が向上してより効果的である。 In addition, if the pressing protrusion (D31) of the third member is heated to an appropriate temperature, the adhesiveness of the resin portion is improved, which is more effective.
このような方法により作製した胴部材ブランク（１０）を用いてカップ状紙容器を成形
する成形方法の一例を説明する（図１参照）。
An example of a molding method for molding a cup-shaped paper container using the trunk member blank (10) produced by such a method will be described (see FIG. 1).
胴部材ブランクの端面の折り返し樹脂部（４ｂ）を設けた側端縁（１１）を内面側にして、もう一方の側端縁に重ね合わせて、胴部貼り合わせ部（１５）を形成させて円筒形状の胴部材（１８）とする。 The side end edge (11) provided with the folded resin portion (4b) on the end surface of the body member blank is set to the inner surface side, and is overlapped with the other side end edge to form the body portion bonding portion (15). A cylindrical body member (18) is used.
前記胴部材（１８）の下部内面に、底部材（２０）の周縁部（２１）の外面を接合させ、さらに周縁部（２１）を覆うように、前記胴部材（１８）の下端縁部を内方に折り曲げ、底部材の周縁部（２１）内面に接合させて環状脚部（２２）を形成させる。 The lower end edge of the body member (18) is joined to the lower inner surface of the body member (18) so that the outer surface of the periphery (21) of the bottom member (20) is joined and further the periphery (21) is covered. It is bent inward and joined to the inner surface of the peripheral edge (21) of the bottom member to form the annular leg (22).
最後に胴部材（１８）の上部周縁を外方に１周以上巻き込み、フランジ部（１６）を形成させ、本発明のカップ状紙容器とする。 Finally, the upper peripheral edge of the body member (18) is wound outward one or more times to form the flange portion (16), thereby obtaining the cup-shaped paper container of the present invention.
フランジ部（１６）は、前記のように上部周縁を外方に１周以上巻き込んだ構成だけでなく、さらに、このフランジ部を上下から、加圧圧着して、上面を平坦にしてもよい。 As described above, the flange portion (16) is not limited to the configuration in which the upper peripheral edge is wound outward one or more times, and further, the flange portion may be pressure-bonded from above and below to flatten the upper surface.
ここで、胴部材（１８）は、両側端縁上部にそれぞれ切欠き部（３１）（３２）を設けた胴部材ブランク（１０）を用いているので、胴部材（１８）の上部周縁を外方に１周以上巻き込んで、フランジ部（１６）を形成した際、貼り合わせ部（１５）においても、紙基材が、前記貼り合せ部以外の部分と同様の重なりの巻き込み状態となるので、フランジ部の段差を解消することができる。 Here, since the trunk member (18) uses the trunk member blank (10) provided with the notches (31) and (32) at the upper ends of both side edges, the upper peripheral edge of the trunk member (18) is removed. When the flange portion (16) is formed by winding more than one turn in the direction, the paper base is also in the overlapping state similar to the portion other than the bonding portion in the bonding portion (15). The step of the flange portion can be eliminated.
また、この切欠き部（３１）（３２）の形状を異なる形状とすると、フランジ部（１５）の上面を平坦にしても、フランジ部上面に生じる段差を解消することができる。 Further, if the notches (31) and (32) are formed in different shapes, the step generated on the upper surface of the flange portion can be eliminated even if the upper surface of the flange portion (15) is flattened.
特に、前記切欠き部（３１）（３２）として、樹脂部を設けた側端部の切欠き部（３１）の幅が、他方の側端部の切欠き部（３２）の幅より大きく、または、樹脂部を設けた側端縁の切欠き部（３１）の高さが、他方の側端縁の切欠き部（３２）の高さより小さくすることで、上端縁を１周以上巻き込んで形成したフランジ部（１６）の上面を平坦にしても、フランジ部（１６）上面に生じる段差を確実に解消することができる。 In particular, as the notches (31) and (32), the width of the notch (31) at the side end provided with the resin portion is larger than the width of the notch (32) at the other side end, Alternatively, the height of the cutout portion (31) on the side edge provided with the resin portion is made smaller than the height of the cutout portion (32) on the other side end edge, so that the upper end edge is wound one or more times. Even if the upper surface of the formed flange portion (16) is flattened, the step generated on the upper surface of the flange portion (16) can be reliably eliminated.
つぎに、他のカップ状紙容器の作製方法の一実施形態を説明する。 Next, an embodiment of another method for producing a cup-shaped paper container will be described.
先ず、連続状の紙基材（３１) に、所要寸法の略四角形状のブランク（３２）を複数個並べて割り付けると共に、前記各ブランクの一方の端縁（３３）からその端縁を含んだ外方の部分を長窓（３４）として穿設する（図１０（ａ），（ｂ）参照）〜第１打ち抜き工程。 First, a plurality of substantially square blanks (32) having required dimensions are arranged and allocated to a continuous paper base (31), and the outer edge including the edge from one edge (33) of each blank is arranged. This portion is drilled as a long window (34) (see FIGS. 10A and 10B) to the first punching step.
長窓（３４）が穿設された紙基材の外面側に熱可塑性樹脂層（２）、内面側にバリア層（２ａ）を有する熱可塑性樹脂層（２）を積層して積層シート（３）を形成する。この時、同時に長窓部分に、端縁に樹脂部（４ａ）を形成し、さらに、基材からから外方に延出する樹脂層を基材の外面側に折り返した、折り返し樹脂部（４ｂ）を形成する（図１１（ａ），（ｂ）、参照）〜熱可塑性樹脂層貼り合わせ工程。 A laminated sheet (3) is formed by laminating a thermoplastic resin layer (2) having a thermoplastic resin layer (2) on the outer surface side and a barrier layer (2a) on the inner surface side of the paper base material in which the long window (34) is perforated. ). At this time, the resin part (4a) is formed at the edge of the long window portion at the same time, and the folded resin part (4b) is formed by folding the resin layer extending outward from the base material to the outer surface side of the base material. ) (See FIGS. 11A and 11B) to a thermoplastic resin layer bonding step.
前記熱可塑性樹脂層が積層された連続状の積層シートから略四角形状のブランクに所要の罫線加工を施すと共に、両側端縁の上部に切欠き部（３１）（３２）を有する形状のブランクを打ち抜き、折り返し樹脂部（４）を形成させた一枚ずつの紙容器ブランク（３２）を作製する（図１２（ａ），（ｂ）参照）〜第２打ち抜き工程。 A blank having a shape having notches (31) and (32) at the upper portions of both side edges is applied to a substantially rectangular blank from a continuous laminated sheet in which the thermoplastic resin layers are laminated. A single paper container blank (32) in which punched and folded resin portions (4) are formed is produced (see FIGS. 12A and 12B) to a second punching step.
このような各工程を経て紙基材から外方に延出した折り返し樹脂部（４）を一方の端縁
に形成させた紙容器ブランク（３２）を作製することができる。
A paper container blank (32) in which a folded resin portion (4) extending outward from the paper base material through such steps is formed on one end edge can be produced.
略四角形状の紙容器ブランク（３２）の前記折り返し樹脂部（４）を紙基材の外面側（５）に仮着させる方法は、図１３、図１４の扇形状の胴部材ブランクの場合と基本的には同じであるので省略する。 The method of temporarily attaching the folded resin portion (4) of the substantially rectangular paper container blank (32) to the outer surface side (5) of the paper substrate is the case of the fan-shaped body member blank of FIGS. Since it is basically the same, it is omitted.
樹脂部（４）を紙基材の外面側（５）に仮着に仮着させた折り返し樹脂部を有する紙容器ブランク（３２）を、罫線の沿って折り曲げ、巻き込み、前記樹脂部（４ｂ）を設けた側端縁を内面側とし、もう一方の側端縁を外面側として重ね合わせた胴部貼り合わせ部（１５）を形成させて筒状の胴部材を形成する。 A paper container blank (32) having a folded resin portion temporarily attached to the outer surface side (5) of the paper substrate with the resin portion (4) is folded and wound along a ruled line, and the resin portion (4b) A cylindrical body member is formed by forming a body-laminated portion (15) in which the side edge provided with the inner side is the inner surface side and the other side edge is the outer surface side.
そして、前記胴部材の下部内面に、底部材（２０）の周縁部（２１）の外面を接合させ、さらに周縁部（２１）を覆うように、前記胴部材（１８）の下端縁部を内方に折り曲げ、底部材の周縁部（２１）内面に接合させて環状脚部（２２）を形成させる。 Then, the outer surface of the peripheral portion (21) of the bottom member (20) is joined to the lower inner surface of the barrel member, and the lower end edge of the barrel member (18) is set to the inner side so as to cover the peripheral portion (21). It is bent in the direction and joined to the inner surface of the peripheral edge (21) of the bottom member to form the annular leg (22).
また、上部開口部を１周以上巻き込み、熱融着して本発明の円筒状のカップ状紙容器とする。 In addition, the upper opening is wound around one or more times and heat-sealed to obtain the cylindrical cup-shaped paper container of the present invention.
ここで、胴部材（１８）は、両側端縁上部にそれぞれ切欠き部（３１）（３２）を設けた胴部材ブランク（１０）を用いているので、胴部材（１８）の上部周縁を外方に１周以上巻き込んで、フランジ部（１６）を形成した際、貼り合わせ部（１５）においても、紙基材が、前記貼り合せ部以外の部分と同様の重なりの巻き込み状態となるので、フランジ部（１６）の段差を解消することができる。 Here, since the trunk member (18) uses the trunk member blank (10) provided with the notches (31) and (32) at the upper ends of both side edges, the upper peripheral edge of the trunk member (18) is removed. When the flange portion (16) is formed by winding more than one turn in the direction, the paper base is also in the overlapping state similar to the portion other than the bonding portion in the bonding portion (15). The level difference of the flange portion (16) can be eliminated.
また、この切欠き部（３１）（３２）の形状を異なる形状とすると、フランジ部（１６）の上面を平坦にしても、フランジ部上面に生じる段差を解消することができる。 Further, if the notches (31) and (32) are formed in different shapes, the level difference generated on the upper surface of the flange portion can be eliminated even if the upper surface of the flange portion (16) is flattened.
特に、前記切欠き部（３１）（３２）として、樹脂部を設けた側端部の切欠き部（３１）の幅が、他方の側端部の切欠き部（３２）の幅より大きく、または、樹脂部を設けた側端縁の切欠き部（３１）の高さが、他方の側端縁の切欠き部（３２）の高さより小さくすることで、上端縁を１周以上巻き込んで形成したフランジ部（１８）の上面を平坦にしても、フランジ部（１８）上面に生じる段差を確実に解消することができる。 In particular, as the notches (31) and (32), the width of the notch (31) at the side end provided with the resin portion is larger than the width of the notch (32) at the other side end, Alternatively, the height of the cutout portion (31) on the side edge provided with the resin portion is made smaller than the height of the cutout portion (32) on the other side end edge, so that the upper end edge is wound one or more times. Even if the upper surface of the formed flange portion (18) is flat, the step generated on the upper surface of the flange portion (18) can be reliably eliminated.
カップ状紙容器の装飾について具体例を説明する。
ａ．紙基材の表面に印刷等により、装飾層を設けた基材を胴部ブランクとして用い、紙容器を製造する。
ｂ．紙基材の表面側に印刷等による装飾層および／または金属蒸着層を設けたプラスチックフィルムを積層した積層材料を用い、紙容器を製造する。
ｃ．成形された紙容器の胴部の表面に、印刷、金属蒸着により装飾層を施したプラスチックフィルムを被覆する。
A specific example of the decoration of the cup-shaped paper container will be described.
a. A paper container is manufactured using a base material provided with a decorative layer as a body blank by printing or the like on the surface of the paper base material.
b. A paper container is manufactured using a laminated material in which a plastic film provided with a decorative layer and / or a metal vapor deposition layer by printing or the like is laminated on the surface side of a paper substrate.
c. The surface of the molded paper container body is covered with a plastic film provided with a decorative layer by printing or metal vapor deposition.
（実施例１）
表側から、紙基材（坪量２６０ｇ／ｍ2）からなるシートに長窓を形成した（図１０参照）。
(Example 1)
From the front side, a long window was formed on a sheet made of a paper substrate (basis weight 260 g / m 2 ) (see FIG. 10).
次に、前記シートの紙基材の表面に低密度ポリエチレン層（３０μｍ）、紙基材の裏面に低密度ポリエチレン層（３０μｍ）／アルミニウム箔（９μｍ）／ポリエチレンテレフタレートフィルム（１２μｍ）／低密度ポリエチレン層（７０μｍ）を設け、前記長窓の位置で、前記低密度ポリエチレン層の内面を接合、一体化した（図１１参照）。 Next, a low density polyethylene layer (30 μm) is formed on the surface of the paper substrate of the sheet, and a low density polyethylene layer (30 μm) / aluminum foil (9 μm) / polyethylene terephthalate film (12 μm) / low density polyethylene is formed on the back surface of the paper substrate. A layer (70 μm) was provided, and the inner surface of the low-density polyethylene layer was joined and integrated at the position of the long window (see FIG. 11).
そして、長窓側の紙基材の側端縁上部に、幅が９ｍｍ、高さが５ｍｍの三角形の切欠き部、他方の側端部上部に、幅が８ｍｍ、高さが６ｍｍの三角形の切欠き部を有する扇形形状（上辺の長さ２２５ｍｍ、下辺の長さ１６２ｍｍ）に打ち抜き、胴部ブランクを形成した（図１２参照）。 Then, a triangular notch with a width of 9 mm and a height of 5 mm is formed on the upper side edge of the paper base on the long window side, and a triangular cut with a width of 8 mm and a height of 6 mm is formed on the other side edge. A body blank was formed by punching into a sector shape having a notch (upper side length: 225 mm, lower side length: 162 mm) (see FIG. 12).
なお、一方の側端縁に設けた樹脂部は、５．５ｍｍ幅で設けた。 In addition, the resin part provided in one side edge was provided with the width of 5.5 mm.
前記樹脂部を有する前記ブランクの樹脂層を有する側端縁を内側とした状態で、側端縁を重ね合わせ接合一体化し、幅が５ｍｍの胴部貼り合わせ部を設けて胴部を形成した。 In a state where the side edge having the resin layer of the blank having the resin part is set to the inside, the side edge is overlapped and joined and integrated, and a body part bonding part having a width of 5 mm is provided to form a body part.
次に、前記胴部の下部内面に、円形状で、下向きに起立させた周縁部（２１）を有する底部材の周縁部（２１）の外面を接合させる。 Next, the outer surface of the peripheral portion (21) of the bottom member having a circular peripheral portion (21) standing downward is joined to the lower inner surface of the body portion.
そして、カップ成形機を用い、前記胴部材（１８）の下部内面に、底部材（２０）の周縁部（２１）の外面を接合させ、さらに周縁部（２１）を覆うように、前記胴部材（１８）の下端縁部を内方に折り曲げ、底部材の周縁部（２１）内面に接合させて、直径が５２ｍｍの環状脚部（２２）を形成した。 And using the cup molding machine, the outer surface of the peripheral portion (21) of the bottom member (20) is joined to the lower inner surface of the cylindrical member (18), and further the peripheral member (21) is covered. The lower end edge of (18) was folded inward and joined to the inner surface of the peripheral edge (21) of the bottom member to form an annular leg (22) having a diameter of 52 mm.
また、トップカールユニットにより、上部開口部を１周以上巻き込み、下側半分が一重巻き、上側半分が二重巻きとなる、幅が３ｍｍのフランジ部を有する、開口の直径が６９ｍｍのカップ状紙容器を成形した。 In addition, the top curl unit winds up the upper opening one or more times, the lower half is single wound, the upper half is double wound, and has a flange portion with a width of 3 mm, and a cup-shaped paper with an opening diameter of 69 mm A container was formed.
前記カップ状紙容器は、フランジ部の上面の、胴部貼り合わせ部に位置する部分に段差がなく成形された。
（実施例２）
実施例１の樹脂部を、紙基材の外面側に折り返し接合した、幅が２．５ｍｍの折り返し樹脂部とした以外は、実施例１と同様にしてカップ状紙容器を得た。
The cup-shaped paper container was formed without a step in a portion of the upper surface of the flange portion, which is located in the body portion bonding portion.
(Example 2)
A cup-shaped paper container was obtained in the same manner as in Example 1 except that the resin part of Example 1 was a folded resin part having a width of 2.5 mm, which was folded and joined to the outer surface side of the paper substrate.
前記、カップ状紙容器は、フランジ部の上面の、胴部貼り合わせ部に位置する部分に段差がなく、また、胴部貼り合わせ部の接合部分にも段差がなく成形された。
（実施例３）
実施例２のフランジ部を、超音波シール装置を用い、上下から加圧圧着し、フランジ上面を平坦にした。
The cup-shaped paper container was formed with no step at the portion of the upper surface of the flange portion located at the body bonding portion, and at the joint portion of the body bonding portion with no step.
(Example 3)
The flange part of Example 2 was pressure-bonded from above and below using an ultrasonic sealing device, and the upper surface of the flange was flattened.
前記、カップ状紙容器は、フランジ部の上面を平坦にしたにもかかわらず、胴部貼り合わせ部に位置する部分に段差がなく成形された。
（実施例４）
表側から、紙基材（坪量２６０ｇ／ｍ2）低密度ポリエチレン（３０μｍ）／アルミニウム箔（９μｍ）／ポリエチレンテレフタレートフィルム（１２μｍ）からなるシートに長窓を形成した（図１０参照）。
The cup-shaped paper container was formed without a step in the portion located in the body portion bonding portion, although the upper surface of the flange portion was flattened.
Example 4
From the front side, long windows were formed on a sheet of paper base material (basis weight 260 g / m 2 ) low density polyethylene (30 μm) / aluminum foil (9 μm) / polyethylene terephthalate film (12 μm) (see FIG. 10).
次に、前記積層シートの紙基材表面に、低密度ポリエチレン層（３０μｍ）、ポリエチレンテレフタレートフィルム面にポリエチレン（７０μｍ）を設け、前記長窓で、前記低密度ポリエチレン層の内面を接合、一体化した（図１１参照）。 Next, a low density polyethylene layer (30 μm) is provided on the paper substrate surface of the laminated sheet, and polyethylene (70 μm) is provided on the polyethylene terephthalate film surface, and the inner surface of the low density polyethylene layer is joined and integrated with the long window. (See FIG. 11).
そして、長窓側の紙基材の側端縁上部に、幅が９ｍｍ、高さが５ｍｍの三角形の切欠き部、他方の側端部上部に、幅が８ｍｍ、高さが６ｍｍの三角形の切欠き部を有する扇形形状（上辺の長さ２２５ｍｍ、下辺の長さ１６２ｍｍ）に打ち抜き、胴部ブランクを形成した（図１２参照）。 Then, a triangular notch with a width of 9 mm and a height of 5 mm is formed on the upper side edge of the paper base on the long window side, and a triangular cut with a width of 8 mm and a height of 6 mm is formed on the other side edge. A body blank was formed by punching into a sector shape having a notch (upper side length: 225 mm, lower side length: 162 mm) (see FIG. 12).
なお、一方の側端縁に設けた樹脂部は、５ｍｍ幅で設けた。 The resin portion provided on one side edge was provided with a width of 5 mm.
前記樹脂部を有する前記ブランクの樹脂層を有する側端縁を内側とした状態で、側端縁を重ね合わせ接合一体化し、幅が５ｍｍの胴部貼り合わせ部を設けて胴部を形成した。 In a state where the side edge having the resin layer of the blank having the resin part is set to the inside, the side edge is overlapped and joined and integrated, and a body part bonding part having a width of 5 mm is provided to form a body part.
次に、前記胴部の下部内面に、円形状で、下向きに起立させた周縁部（２１）を有する底部材の周縁部（２１）の外面を接合させる。 Next, the outer surface of the peripheral portion (21) of the bottom member having a circular peripheral portion (21) standing downward is joined to the lower inner surface of the body portion.
そして、カップ成形機を用い、前記胴部材（１８）の下部内面に、底部材（２０）の周縁部（２１）の外面を接合させ、さらに周縁部（２１）を覆うように、前記胴部材（１８）の下端縁部を内方に折り曲げ、底部材の周縁部（２１）内面に接合させて、直径が５２ｍｍの環状脚部（２２）を形成した。 And using the cup molding machine, the outer surface of the peripheral portion (21) of the bottom member (20) is joined to the lower inner surface of the cylindrical member (18), and further the peripheral member (21) is covered. The lower end edge of (18) was folded inward and joined to the inner surface of the peripheral edge (21) of the bottom member to form an annular leg (22) having a diameter of 52 mm.
また、トップカールユニットにより、上部開口部を１周以上巻き込み、下側半分が一重巻き、上側半分が二重巻きとなる、幅が３ｍｍのフランジ部を有する、開口の直径が６９ｍｍのカップ状紙容器を成形した。 In addition, the top curl unit winds up the upper opening one or more times, the lower half is single wound, the upper half is double wound, and has a flange portion with a width of 3 mm, and a cup-shaped paper with an opening diameter of 69 mm A container was formed.
前記カップ状紙容器は、フランジ部の上面の、胴部貼り合わせ部に位置する部分に段差がなく成形された。
（実施例５）
実施例４の樹脂部を、紙基材の外面側に折り返し接合した、２．５ｍｍ折り返し樹脂部とした以外は、実施例４と同様にしてカップ状紙容器を得た。
The cup-shaped paper container was formed without a step in a portion of the upper surface of the flange portion, which is located in the body portion bonding portion.
(Example 5)
A cup-shaped paper container was obtained in the same manner as in Example 4 except that the resin part of Example 4 was a 2.5 mm folded resin part that was folded and joined to the outer surface side of the paper substrate.
前記、カップ状紙容器は、フランジ部の上面の、胴部貼り合わせ部に位置する部分に段差がなく、また、胴部貼り合わせ部の接合部分にも段差がなく成形された。
（実施例６）
実施例５のフランジ部を、超音波シール装置を用い、上下から加圧圧着し、フランジ上面を平坦にした。
The cup-shaped paper container was formed with no step at the portion of the upper surface of the flange portion located at the body bonding portion, and at the joint portion of the body bonding portion with no step.
(Example 6)
The flange portion of Example 5 was pressure-bonded from above and below using an ultrasonic sealing device to flatten the upper surface of the flange.
前記、カップ状紙容器は、フランジ部の上面を平坦にしたにもかかわらず、胴部貼り合わせ部に位置する部分に段差がなく成形された。
（実施例７）
表側から、紙基材（坪量２６０ｇ／ｍ2）からなるシートに長窓を形成した（図１０参照）。
The cup-shaped paper container was formed without a step in the portion located in the body portion bonding portion, although the upper surface of the flange portion was flattened.
(Example 7)
From the front side, a long window was formed on a sheet made of a paper substrate (basis weight 260 g / m 2 ) (see FIG. 10).
次に、前記紙基材の裏面に、低密度ポリエチレン（２０μｍ）／アルミニウム箔（９μｍ）／ポリエチレンテレフタレートフィルム（１２μｍ）／低密度ポリエチレン（１５μｍ）を設け、シート紙基材表面の長窓部分を覆うように、低密度ポリエチレン層（７０μｍ）／ポリエチレンテレフタレートフィルム（１２μｍ）／低密度ポリエチレン層（２０μｍ）からなるテープを設け、前記長窓で、前記ポリエチレン層の内面を接合、一体化した（図１１参照）。 Next, low-density polyethylene (20 μm) / aluminum foil (9 μm) / polyethylene terephthalate film (12 μm) / low-density polyethylene (15 μm) is provided on the back surface of the paper substrate, and the long window portion on the surface of the sheet paper substrate is provided. A tape composed of a low density polyethylene layer (70 μm) / polyethylene terephthalate film (12 μm) / low density polyethylene layer (20 μm) is provided so as to cover, and the inner surface of the polyethylene layer is joined and integrated with the long window (FIG. 11).
そして、長窓側の紙基材の側端縁上部に、幅が９ｍｍ、高さが５ｍｍの三角形の切欠き部、他方の側端部上部に、幅が８ｍｍ、高さが６ｍｍの三角形の切欠き部を有する扇形形状（上辺の長さ２２５ｍｍ、下辺の長さ１６２ｍｍ）に打ち抜き、胴部ブランクを形成した（図１２参照）。 Then, a triangular notch with a width of 9 mm and a height of 5 mm is formed on the upper side edge of the paper base on the long window side, and a triangular cut with a width of 8 mm and a height of 6 mm is formed on the other side edge. A body blank was formed by punching into a sector shape having a notch (upper side length: 225 mm, lower side length: 162 mm) (see FIG. 12).
なお、一方の側端縁に設けた樹脂部は、５ｍｍ幅で設けた。 The resin portion provided on one side edge was provided with a width of 5 mm.
前記樹脂部を有する前記ブランクの樹脂層を有する側端縁を内側とした状態で、側端縁を重ね合わせ接合一体化し、幅が５ｍｍの胴部貼り合わせ部を設けて胴部を形成した。 In a state where the side edge having the resin layer of the blank having the resin part is set to the inside, the side edge is overlapped and joined and integrated, and a body part bonding part having a width of 5 mm is provided to form a body part.
次に、前記胴部の下部内面に、円形状で、下向きに起立させた周縁部（２１）を有する底部材の周縁部（２１）の外面を接合させる。 Next, the outer surface of the peripheral portion (21) of the bottom member having a circular peripheral portion (21) standing downward is joined to the lower inner surface of the body portion.
そして、カップ成形機を用い、前記胴部材（１８）の下部内面に、底部材（２０）の周縁部（２１）の外面を接合させ、さらに周縁部（２１）を覆うように、前記胴部材（１８）の下端縁部を内方に折り曲げ、底部材の周縁部（２１）内面に接合させて、直径が５２ｍｍの環状脚部（２２）を形成した。 And using the cup molding machine, the outer surface of the peripheral portion (21) of the bottom member (20) is joined to the lower inner surface of the cylindrical member (18), and further the peripheral member (21) is covered. The lower end edge of (18) was folded inward and joined to the inner surface of the peripheral edge (21) of the bottom member to form an annular leg (22) having a diameter of 52 mm.
また、トップカールユニットにより、上部開口部を１周以上巻き込み、下側半分が一重巻き、上側半分が二重巻きとなる、幅が３ｍｍのフランジ部を有する、開口の直径が６９ｍｍのカップ状紙容器を成形した。 In addition, the top curl unit winds up the upper opening one or more times, the lower half is single wound, the upper half is double wound, and has a flange portion with a width of 3 mm, and a cup-shaped paper with an opening diameter of 69 mm A container was formed.
前記カップ状紙容器は、フランジ部の上面の、胴部貼り合わせ部に位置する部分に段差がなく成形された。
（実施例８）
実施例７の樹脂部を、紙基材の外面側に折り返し接合した、幅が２．５ｍｍも折り返し樹脂部とした以外は、実施例７と同様にしてカップ状紙容器を得た。
The cup-shaped paper container was formed without a step in a portion of the upper surface of the flange portion, which is located in the body portion bonding portion.
(Example 8)
A cup-shaped paper container was obtained in the same manner as in Example 7 except that the resin part of Example 7 was folded and joined to the outer surface side of the paper base material, and the width was also 2.5 mm.
前記、カップ状紙容器は、フランジ部の上面の、胴部貼り合わせ部に位置する部分に段差がなく、また、胴部貼り合わせ部の接合部分にも段差がなく成形された。
（実施例９）
実施例８のフランジ部を、超音波シール装置を用い、上下から加圧圧着し、フランジ上面を平坦にした。
The cup-shaped paper container was formed with no step at the portion of the upper surface of the flange portion located at the body bonding portion, and at the joint portion of the body bonding portion with no step.
Example 9
The flange part of Example 8 was pressure-bonded from above and below using an ultrasonic sealing device to flatten the upper surface of the flange.
前記、カップ状紙容器は、フランジ部の上面を平坦にしたにもかかわらず、胴部貼り合わせ部に位置する部分に段差がなく成形された。
（実施例１０）
表側から、低密度ポリエチレン層（３０μｍ）／紙基材（坪量２６０ｇ／ｍ2）からなるシートに長窓を形成した（図１０参照）。
The cup-shaped paper container was formed without a step in the portion located in the body portion bonding portion, although the upper surface of the flange portion was flattened.
(Example 10)
From the front side, a long window was formed on a sheet composed of a low-density polyethylene layer (30 μm) / paper substrate (basis weight 260 g / m 2 ) (see FIG. 10).
次に、前記紙基材の裏面に低密度ポリエチレン（３０μｍ）／アルミニウム箔（９μｍ）／ポリエチレンテレフタレートフィルム（１２μｍ）／低密度ポリエチレン層（１５μｍ）を設け、シート紙基材表面の長窓部分を覆うように設けた（図１１参照）。 Next, low-density polyethylene (30 μm) / aluminum foil (9 μm) / polyethylene terephthalate film (12 μm) / low-density polyethylene layer (15 μm) is provided on the back surface of the paper substrate, and the long window portion on the surface of the sheet paper substrate is provided. It provided so that it might cover (refer FIG. 11).
そして、長窓側の紙基材の側端縁上部に、幅が９ｍｍ、高さが５ｍｍの三角形の切欠き部、他方の側端部上部に、幅が８ｍｍ、高さが６ｍｍの三角形の切欠き部を有する扇形形状（上辺の長さ２２５ｍｍ、下辺の長さ１６２ｍｍ）に打ち抜き、胴部ブランクを形成した（図１２参照）。 Then, a triangular notch with a width of 9 mm and a height of 5 mm is formed on the upper side edge of the paper base on the long window side, and a triangular cut with a width of 8 mm and a height of 6 mm is formed on the other side edge. A body blank was formed by punching into a sector shape having a notch (upper side length: 225 mm, lower side length: 162 mm) (see FIG. 12).
なお、一方の側端縁に設けた樹脂部は、５ｍｍ幅で設けた。 The resin portion provided on one side edge was provided with a width of 5 mm.
前記樹脂部を有する前記ブランクの樹脂層を有する側端縁を内側とした状態で、側端縁を重ね合わせ接合一体化し、幅が５ｍｍの胴部貼り合わせ部を設けて胴部を形成した。 In a state where the side edge having the resin layer of the blank having the resin part is set to the inside, the side edge is overlapped and joined and integrated, and a body part bonding part having a width of 5 mm is provided to form a body part.
次に、前記胴部の下部内面に、円形状で、下向きに起立させた周縁部（２１）を有する底部材の周縁部（２１）の外面を接合させる。 Next, the outer surface of the peripheral portion (21) of the bottom member having a circular peripheral portion (21) standing downward is joined to the lower inner surface of the body portion.
そして、カップ成形機を用い、前記胴部材（１８）の下部内面に、底部材（２０）の周縁部（２１）の外面を接合させ、さらに周縁部（２１）を覆うように、前記胴部材（１８）の下端縁部を内方に折り曲げ、底部材の周縁部（２１）内面に接合させて、直径が５２ｍｍの環状脚部（２２）を形成した。 And using the cup molding machine, the outer surface of the peripheral portion (21) of the bottom member (20) is joined to the lower inner surface of the cylindrical member (18), and further the peripheral member (21) is covered. The lower end edge of (18) was folded inward and joined to the inner surface of the peripheral edge (21) of the bottom member to form an annular leg (22) having a diameter of 52 mm.
また、トップカールユニットにより、上部開口部を１周以上巻き込み、下側半分が一重巻き、上側半分が二重巻きとなる、幅が３ｍｍのフランジ部を有する、開口の直径が６９ｍｍのカップ状紙容器を成形した。 In addition, the top curl unit winds up the upper opening one or more times, the lower half is single wound, the upper half is double wound, and has a flange portion with a width of 3 mm, and a cup-shaped paper with an opening diameter of 69 mm A container was formed.
前記カップ状紙容器は、フランジ部の上面の、胴部貼り合わせ部に位置する部分に段差がなく成形された。
（実施例１１）
実施例１０の樹脂部を、紙基材の外面側に折り返し接合した、幅が、３ｍｍの折り返し樹脂部とした以外は、実施例１０と同様にしてカップ状紙容器を得た。
The cup-shaped paper container was formed without a step in a portion of the upper surface of the flange portion, which is located in the body portion bonding portion.
(Example 11)
A cup-shaped paper container was obtained in the same manner as in Example 10 except that the resin part of Example 10 was folded and joined to the outer surface side of the paper base material to obtain a folded resin part having a width of 3 mm.
前記、カップ状紙容器は、フランジ部の上面の、胴部貼り合わせ部に位置する部分に段差がなく、また、胴部貼り合わせ部の接合部分にも段差がなく成形された。
（実施例１２）
実施例１１のフランジ部を、超音波シール装置を用い、上下から加圧圧着し、フランジ上面を平坦にした。
The cup-shaped paper container was formed with no step at the portion of the upper surface of the flange portion located at the body bonding portion, and at the joint portion of the body bonding portion with no step.
(Example 12)
The flange part of Example 11 was pressure-bonded from above and below using an ultrasonic sealing device to flatten the upper surface of the flange.
前記、カップ状紙容器は、フランジ部の上面を平坦にしたにもかかわらず、胴部貼り合わせ部に位置する部分に段差がなく成形された。 The cup-shaped paper container was formed without a step in the portion located in the body portion bonding portion, although the upper surface of the flange portion was flattened.
１‥‥紙基材 ４０、４１‥‥熱可塑性樹脂層 ２ａ‥バリア層
３‥‥積層シート ４ａ‥‥樹脂部 ４ｂ‥‥折り返し樹脂部
５‥‥紙基材端面 １０‥‥胴部材ブランク
１１‥‥樹脂部を有する側端縁 １２‥‥樹脂部を設けない側端縁
１３‥‥長窓 １４‥‥胴部材ブランクの不必要部分
１５‥‥貼り合わせ部 １６‥‥フランジ部 ２０‥‥底部材
２１‥‥周縁部 ２２‥‥環状脚部 ３１、３２‥‥切欠き部
Ｄ１‥‥第１部材 Ｄ１１‥押さえ突起 Ｄ１２‥間隙
Ｄ２‥‥第２部材 Ｄ２１‥押さえ突起 Ｄ３‥‥第３部材
Ｄ３１‥押さえ突起
DESCRIPTION OF
Claims (19)
前記ブランクの重ね合わせ部の内側に位置する側端縁は、前記基材の側端縁から延出する樹脂部を有し、かつ、両側端縁上部にそれぞれ切欠き部を設けたことを特徴とするカップ状紙容器。 At least an inner surface of a blank composed of a laminated sheet made of paper having a thermoplastic resin layer provided on the inner surface, with one side edge overlapped with the other side edge, and an upper end edge In a cup-shaped paper container in which a bottom member is integrated with a cylindrical body member in which a flange portion is formed, and a bottom member is integrated in the lower part of the body member,
The side edge located inside the overlapping part of the blank has a resin part extending from the side edge of the base material, and a notch is provided in each upper part of both side edges. A cup-shaped paper container.
前記ブランクの、一方の側端縁に外方に延出する樹脂部を形成する樹脂部形成工程と、
前記ブランクの、両側端縁上部に切欠き部を設ける切欠き部形成工程と、
前記ブランクの樹脂部を形成した側端縁を、他方の側端縁の内側となるように重ね合わせ、密着する胴部貼り合わせ部を形成する胴部形成工程と、
前記胴部下部に、少なくとも内面に熱可塑性樹脂層が設けられた紙を基材とする積層シートを所定の形状に打ち抜いた底部材を一体化する底部形成工程と、
前記胴部上端縁を１周以上巻き込み、フランジ部を形成するフランジ部形成工程と、
を有することを特徴とするカップ状紙容器の製造方法。 A punching step of forming a blank by punching a laminated sheet based on a paper having a thermoplastic resin layer on at least an inner surface into a predetermined shape;
A resin part forming step of forming a resin part extending outwardly on one side edge of the blank; and
The blank, notch portion forming step of providing a notch portion on both upper edges,
The body part forming step of forming the body part bonding part that overlaps and closely adheres the side edge forming the resin part of the blank to the inside of the other side edge;
A bottom portion forming step of integrating a bottom member formed by punching a laminated sheet having a base material made of paper having at least an inner surface provided with a thermoplastic resin layer into the lower portion of the body portion;
A flange portion forming step of winding the upper end edge of the body portion one or more times to form a flange portion;
A method for producing a cup-shaped paper container, comprising:
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| JP2011037503A (en) * | 2009-08-18 | 2011-02-24 | Toppan Printing Co Ltd | Paper cup |
| JP2011184073A (en) * | 2010-03-09 | 2011-09-22 | Toppan Printing Co Ltd | Water resistance barrier paper container and method of manufacturing the same |
| JP2012245992A (en) * | 2011-05-26 | 2012-12-13 | Toppan Printing Co Ltd | Cup type paper container |
| JP2013256312A (en) * | 2012-06-12 | 2013-12-26 | Toppan Printing Co Ltd | Laminate and paper container using the same |
| JP2014151919A (en) * | 2013-02-05 | 2014-08-25 | Toppan Printing Co Ltd | Method for manufacturing cup type paper container, and cup type paper container |
| JP2015078018A (en) * | 2009-06-23 | 2015-04-23 | 凸版印刷株式会社 | Retort cup |
| CN112978004A (en) * | 2019-12-16 | 2021-06-18 | 昭和电工包装株式会社 | Cup-shaped container and method for manufacturing same |
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