JP2004017408A - Method for molding paper container and molded paper container - Google Patents

Method for molding paper container and molded paper container Download PDF

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Publication number
JP2004017408A
JP2004017408A JP2002173938A JP2002173938A JP2004017408A JP 2004017408 A JP2004017408 A JP 2004017408A JP 2002173938 A JP2002173938 A JP 2002173938A JP 2002173938 A JP2002173938 A JP 2002173938A JP 2004017408 A JP2004017408 A JP 2004017408A
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Japan
Prior art keywords
paper
paper container
molded
molding
embossing
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JP2002173938A
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Japanese (ja)
Inventor
Minoru Nagae
永江　実
Kayoko Hamada
浜田　佳代子
Kiyoshi Sawada
澤田　清志
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Toppan Inc
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Toppan Printing Co Ltd
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Priority to JP2002173938A priority Critical patent/JP2004017408A/en
Publication of JP2004017408A publication Critical patent/JP2004017408A/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B50/00—Making rigid or semi-rigid containers, e.g. boxes or cartons
    • B31B50/59—Shaping sheet material under pressure
    • B31B50/592—Shaping sheet material under pressure using punches or dies
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B50/00—Making rigid or semi-rigid containers, e.g. boxes or cartons
    • B31B50/74—Auxiliary operations
    • B31B50/88—Printing; Embossing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F—MECHANICAL WORKING OR DEFORMATION OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F1/00—Mechanical deformation without removing material, e.g. in combination with laminating
    • B31F1/0077—Shaping by methods analogous to moulding, e.g. deep drawing techniques
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F—MECHANICAL WORKING OR DEFORMATION OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F1/00—Mechanical deformation without removing material, e.g. in combination with laminating
    • B31F1/07—Embossing, i.e. producing impressions formed by locally deep-drawing, e.g. using rolls provided with complementary profiles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F—MECHANICAL WORKING OR DEFORMATION OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F1/00—Mechanical deformation without removing material, e.g. in combination with laminating
    • B31F1/12—Crêping
    • B31F1/122—Crêping the paper being submitted to an additional mechanical deformation other than crêping, e.g. for making it elastic in all directions

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Containers Having Bodies Formed In One Piece (AREA)
  • Making Paper Articles (AREA)
  • Machines For Manufacturing Corrugated Board In Mechanical Paper-Making Processes (AREA)
  • Laminated Bodies (AREA)
  • Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for molding a paper container which generates no creases and breakage even by a deep-drawing process during molding a paper laminated material, and a paper container molded by this method. <P>SOLUTION: An irregular paper laminated material (ll) obtained by pinching and embossing both sides of the paper laminated material (l0) with a thermoplastic resin layer(2) laminated on at least one side of a base material layer(l) formed of a board by a pair of embossing rolls so that the tensile break elongation in the flow direction to the draw depth in the thickness direction is l0 to 200% and the tensile break elongation in the width direction is l0 to 200%, is drawn by a pair of the male and female molds(32a and 32b) of a molding machine (30). <P>COPYRIGHT: (C)2004,JPO

Description

【０００１】
【発明の属する技術分野】
各種の食品類、非食品類等を充填包装する紙容器の成型方法及びその方法で成型した紙容器に関するものである。
【０００２】
【従来の技術】
従来、成型紙容器に使用する紙積層材料の基材層に用いる板紙としては、通常、抄紙されたままの状態で使用される場合が多い。この板紙を積層した紙積層材料を用いて、ある程度以上の深さの紙容器に絞り成型加工すると、成型加工時に板紙が幅方向あるいは長さ方向に伸ばされ、破れてしまうことが多い。これらの成型加工時の問題を改善する為に板紙の抄紙過程で前もって幅方向及び長さ方向に収縮させたり、板紙の密度を低くしたりして、成型加工時の絞り成型適性を向上させた板紙等が上市されているが、前者の収縮させたものは表面平滑性が悪く、表面コート剤等を未加工の状態で表面印刷することが難しく、後者の密度を低くしたものは浅絞りの成型加工を行った場合でも皺などが入り易く、成型加工適性が悪かった。
【０００３】
【発明が解決しようとする課題】
本発明の課題は、紙積層材料を成型加工時に深く絞り加工しても、皺及び破れが生じない紙容器成型方法及びその方法で成型した紙容器を提供することにある。
【０００４】
【課題を解決するための手段】
本発明の請求項１に係る発明は、板紙からなる基材層の少なくとも一方の面に熱可塑性樹脂層を積層した紙積層材料の両面を一対のエンボスロールで挟み込んで厚み方向に絞り深度に対応して流れ方向の引張破断伸びが１０〜２００％、幅方向の引張破断伸びが１０〜２００％になるように凹凸状のエンボス加工を施した凹凸状紙積層材料を成型機の一対の雄雌金型で絞り成型加工することを特徴とする紙容器成型方法である。
【０００５】
本発明の請求項２に係る発明は、上記請求項１記載の紙容器成型方法で絞り成型加工されたものからなることを特徴とする成型紙容器である。
【０００６】
【作用】
本発明によれば、板紙からなる基材層の少なくとも一方の面に熱可塑性樹脂層を積層した紙積層材料を、成型加工前にその両面をエンボス装置の一対のエンボスロールで挟み込んで厚み方向に絞り深度に対応して流れ方向の引張破断伸びが１０〜２００％、幅方向の引張破断伸びが１０〜２００％になるように凹凸状のエンボス加工を施した凹凸状紙積層材料を所定形状に打ち抜き、成型機に装着し、雄雌金型で絞り成型加工しているので、成型紙容器の絞り深度に応じて適切な流れ方向の引張破断伸び及び幅方向の引張破断伸びを有する凹凸状紙積層材料を用いることにより、絞り成型時に加工された凹凸状が伸ばされる状態で絞られるので皺などが入らず、破れることがなく、得られた成型紙容器の腰も良好である。また、基材層に使用している板紙は通常使用されているものを用いているので、その板紙原紙への印刷適性も良好である。
【０００７】
【発明の実施の形態】
本発明の紙容器成型方法及び成型紙容器を、実施の形態に沿って以下に詳細に説明する。
【０００８】
図２（ａ）は本発明の成型紙容器に使用するエンボス加工前の紙積層材料（１０）の一例を示す側断面図であり、板紙からなる基材層（１）の一方の面に熱可塑性樹脂層（２）を積層した構成になっており、（ｂ）はエンボス加工前の紙積層材料（１０）の他の例を示す側断面図であり、板紙からなる基材層（１）の両面に熱可塑性樹脂層（２）を積層した構成になっている。
【０００９】
図３はエンボス加工方法の一例を示す概略図であり、エンボス装置（２０）は凸状のエンボスロール（２０ａ）と凹状のエンボスロール（２０ｂ）とを備えており、エンボス装置（２０）に挿入された紙積層材料（１０）を両側から凸状のエンボスロール（２０ａ）と凹状のエンボスロール（２０ｂ）で挟み込み、回転させながら紙積層材料（１０）を厚み方向に凹凸状にエンボス加工し、凹凸状紙積層材料（１１）を得る。挿入する紙積層材料（１０）は巻き取り状態のもの、枚葉状態のいずれでも良い。加工する凹凸状のエンボスのピッチ及び深さは、成型紙容器の絞り深さに対応して、流れ方向の引張破断伸びが１０〜２００％、幅方向の引張破断伸びが１０〜２００％になるように凹凸状にエンボス加工を施す。上記の範囲の引張破断伸びを有する凹凸状紙積層材料（１１）を成型容器の絞り深度に応じて適宜使用し、絞り成型加工することにより、皺がなく、破れもない成型が可能になる。
【００１０】
図１は本発明の紙容器成型方法の一例を示す説明図であり、成型機（３０）は雄金型（３２ａ）と雌金型（３２ｂ）を備えており、両側に凹凸状紙積層材料（１１）の両端を固定させる為の固定治具（３１）を備えている。
【００１１】
紙容器成型方法を説明すると、前記凹凸状紙積層材料（１１）を成型機（３０）の雄金型（３２ａ）と雌金型（３２ｂ）の間に装着し、成型機（３０）の両側に設けられた固定治具（３１）で凹凸状紙積層材料（１１）の両端をしっかり固定後に、雄金型（３２ａ）を雌金型（３２ｂ）内に油圧方式、空圧方式等で一定の応力（３３）をかけて押し込む。凹凸状紙積層材料（１１）は両端が固定治具（３１）で固定されているので、凹凸状紙積層材料（１１）はその凹凸が伸びる状態で絞られ、成型加工される。従って、凹凸状紙積層材料（１１）を深く絞り加工しても皺が入ったり、破れることが少ない。
【００１２】
前記基材層（１）は、坪量１００〜５００ｇ／ｍ２　の板紙を使用する。
【００１３】
前記熱可塑性樹脂層（２）に使用する樹脂は、耐薬剤性を有し、かつ、成型加工性を有する樹脂であれば特に限定されないが、例えば、ポリオレフィン系樹脂、ポリエステル系樹脂、ポリアミド系樹脂、ポリイミド系樹脂等が使用でき、厚さは５μｍ〜１００μｍの範囲が好ましい。
【００１４】
前記熱可塑性樹脂層（２）の積層方法は、前記樹脂を公知の溶融押出ラミネート法で基材層（１）に直接積層する。
【００１５】
図４（ａ）は本発明の成型紙容器の一例を示す側断面図であり、熱可塑性樹脂層（２）が成型紙容器の内面に積層されており、（ｂ）は他の例を示す側断面図であり、熱可塑性樹脂層（２）が成型紙容器の外面に積層されており、（ｃ）はさらに他の例を示す側断面図であり、成型紙容器の両面に熱可塑性樹脂層（２）が積層されている。前記の紙容器成型方法で成型されているので、深く絞り加工されても成型紙容器には皺が発生していない。
【００１６】
【実施例】
本発明の成型紙容器を具体的な実施例を挙げて説明する。
【００１７】
〈実施例１〉
流れ方向の引張破断伸び５％、幅方向の引張破断伸び１０％、坪量２７０ｇ／ｍ２　の板紙からなる基材層（１）の片面に厚さ３０μｍのポリブチレンテレフタレート樹脂を積層した紙積層材料（１０）を準備した。その紙積層材料（１０）を図３に示したエンボス装置（２０）に装着し、その紙積層材料（１０）を温度１２０℃の１対のエンボスロール（２０ａ、２０ｂ）でエンボスピッチ３．０ｍｍ、エンボス高さ０．７ｍｍの凹凸状にエンボス加工し、凹凸状紙積層材料（１１）を得た。得られた凹凸状紙積層材料（１１）は流れ方向の引張破断伸びは５０％、幅方向の引張破断伸びは５０％であった。
【００１８】
引き続き、前記凹凸状紙積層材料（１１）を所定形状に打ち抜いた後に、その凹凸状紙積層材料（１１）を図１に示す成型機（３０）に装着し、凹凸状紙積層材料（１１）の両端を固定治具（３１）で固定した後に、温度１３０℃の雄金型（３２ａ）を同温度の雌金型（３２ｂ）内に空圧方式で押し込み、深さ５ｍｍ、幅５０ｍｍ、長さ１００ｍｍの本発明の成型紙容器を成型した。
【００１９】
〈比較例１〉
流れ方向の引張破断伸び５％、幅方向の引張破断伸び１０％、坪量２７０ｇ／ｍ２　の板紙の片面に厚さ３０μｍのポリブチレンテレフタレート樹脂を積層し紙積層材料を準備し、その紙積層材料に凹凸状のエンボス加工をしないで所定形状に打ち抜いて、成型機（３０）に装着し、成型した以外は、実施例１と同様にして比較用の成型紙容器を成型した。
【００２０】
〈比較例２〉
流れ方向の引張破断伸び２０％、幅方向の引張破断伸び１０％、坪量２７０ｇ／ｍ２　で抄紙時に凹凸状にした板紙の片面に厚さ３０μｍのポリブチレンテレフタレート樹脂を積層した紙積層材料を準備し、その紙積層材料に凹凸状のエンボス加工をしないで所定形状に打ち抜いて、成型機（３０）に装着し、成型した以外は、実施例１と同様にして比較用の成型紙容器を成型した。
【００２１】
〈評価〉
実施例１及び比較例１〜２の成型紙容器に使用した板紙原紙の印刷適性、成型加工時の皺、破れの発生の有無、成型紙容器の腰の良否を評価した。その結果を表１に示す。
【００２２】
【表１】

Figure 2004017408
【００２３】
表１に示すように、実施例１の成型紙容器は使用した板紙原紙の印刷適性は良好で、成型加工時の皺、破れの発生もなく、成型紙容器の腰も略良好であった。比較例１の成型紙容器は成型加工時に皺、破れが発生し不良であった。比較例２の成型紙容器は使用した板紙原紙の表面が凹凸で印刷適性は不良で、成型加工時の皺、破れの発生はなかったが、成型紙容器の腰は弱かった。
【００２４】
【発明の効果】
本発明の紙容器成型方法は、一般的に使用される板紙からなる基材層の少なくとも一方の面に熱可塑性樹脂層を積層した紙積層材料を、成型加工前に両面をエンボス装置の一対のエンボスロールで挟み込んで厚み方向に絞り深度に対応して流れ方向の引張破断伸びが１０〜２００％、幅方向の引張破断伸びが１０〜２００％になるように凹凸状のエンボス加工を施した凹凸状紙積層材料を作成し、その凹凸状積層材料を所定形状に打ち抜き、成型機に装着し、両端を成型機に固定した後に雄金型を雌金型に押し込んで、絞り加工しているので、成型加工時に皺あるいは破れが発生せず、得られた成型紙容器の腰も良好であった。また、基材層に一般的に使用される板紙を使用しているので、その板紙原紙への印刷適性も良好であった。
【図面の簡単な説明】
【図１】本発明の紙容器成型方法の一例を示す概略図である。
【図２】（ａ）は本発明の成型紙容器に使用した紙積層材料の一例を示す側断面図であり、（ｂ）は紙積層材料の他の例を示す側断面図である。
【図３】エンボス加工方法の一例を示す概略図である。
【図４】（ａ）は本発明の成型紙容器の一例を示す側断面図であり、（ｂ）は成型紙容器の他の例を示す側断面図であり、（ｃ）は成型紙容器のさらに他の例を示す側断面図である。
【符号の説明】
１…基材層
２…熱可塑性樹脂層
１０…紙積層材料
１１…凹凸状紙積層材料
２０…エンボス装置
２０ａ，２０ｂ…エンボスロール
３０…成型機
３１…固定治具
３２ａ…雄金型
３２ｂ…雌金型
３３…応力[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a method for molding a paper container for filling and packaging various foods, non-foods, and the like, and a paper container molded by the method.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, as a paperboard used for a base layer of a paper laminate material used for a molded paper container, usually, it is often used in an as-made state. When the paper laminate material obtained by laminating the paperboard is drawn and formed into a paper container having a depth of a certain degree or more, the paperboard is stretched in the width direction or the length direction at the time of the forming process, and is often broken. In order to improve these problems during the forming process, the paperboard was previously contracted in the width and length directions during the papermaking process, or the density of the paperboard was reduced, thereby improving the drawability during the forming process. Paperboard etc. are on the market, but the former shrunk one has poor surface smoothness, it is difficult to print the surface in an unprocessed state with a surface coating agent, etc. Even when molding was performed, wrinkles and the like were easily formed, and molding suitability was poor.
[0003]
[Problems to be solved by the invention]
An object of the present invention is to provide a paper container molding method which does not cause wrinkles and tears even when a paper laminate material is deeply drawn during molding, and a paper container molded by the method.
[0004]
[Means for Solving the Problems]
The invention according to claim 1 of the present invention corresponds to the drawing depth in the thickness direction by sandwiching both surfaces of a paper laminated material in which a thermoplastic resin layer is laminated on at least one surface of a base material layer made of paperboard with a pair of embossing rolls. A pair of male and female of a molding machine is formed by embossing the uneven paper laminate material so that the tensile elongation at break in the flow direction is 10 to 200% and the elongation at break in the width direction is 10 to 200%. This is a paper container molding method characterized by drawing and forming with a mold.
[0005]
The invention according to a second aspect of the present invention is a molded paper container which is formed by drawing and forming by the paper container molding method according to the first aspect.
[0006]
[Action]
According to the present invention, a paper laminated material obtained by laminating a thermoplastic resin layer on at least one surface of a base material layer made of paperboard is sandwiched on both sides by a pair of emboss rolls of an embossing device in a thickness direction before molding. The embossed uneven paper laminate material having a tensile elongation at break in the flow direction of 10 to 200% and a tensile elongation at break in the width direction of 10 to 200% corresponding to the drawing depth is formed into a predetermined shape. Since it is punched, mounted on a molding machine, and drawn by male and female molds, uneven paper with appropriate tensile breaking elongation in the flow direction and tensile breaking elongation in the width direction according to the drawing depth of the molded paper container By using the laminated material, the unevenness processed at the time of drawing is squeezed in a stretched state, so that wrinkles and the like do not enter, the material is not broken, and the obtained molded paper container has good stiffness. Further, since the paperboard used for the base layer is a commonly used paperboard, the printability on the paperboard base paper is also good.
[0007]
BEST MODE FOR CARRYING OUT THE INVENTION
The paper container molding method and the molded paper container of the present invention will be described in detail below according to embodiments.
[0008]
FIG. 2A is a side sectional view showing an example of a paper laminate material (10) before embossing used in the molded paper container of the present invention, in which heat is applied to one surface of a base material layer (1) made of paperboard. (B) is a side sectional view showing another example of the paper laminate material (10) before embossing, and is a base material layer (1) made of paperboard. Are formed by laminating thermoplastic resin layers (2) on both surfaces.
[0009]
FIG. 3 is a schematic view showing an example of the embossing method. The embossing device (20) includes a convex embossing roll (20a) and a concave embossing roll (20b), and is inserted into the embossing device (20). The laminated paper material (10) is sandwiched between the convex embossing roll (20a) and the concave embossing roll (20b) from both sides, and the paper laminated material (10) is embossed in the thickness direction while being rotated while being rotated. An uneven paper laminate material (11) is obtained. The paper laminated material (10) to be inserted may be in a wound state or a single sheet state. The pitch and depth of the embossed irregularities to be processed are such that the tensile breaking elongation in the flow direction is 10 to 200% and the tensile breaking elongation in the width direction is 10 to 200%, corresponding to the drawing depth of the molded paper container. Is embossed in an uneven manner as described above. By appropriately using the uneven paper laminate material (11) having a tensile elongation at break in the above range according to the drawing depth of the forming container and drawing and forming, it is possible to form without wrinkles and without tearing.
[0010]
FIG. 1 is an explanatory view showing an example of a paper container molding method according to the present invention. A molding machine (30) includes a male mold (32a) and a female mold (32b), and has an uneven paper laminate material on both sides. A fixing jig (31) for fixing both ends of (11) is provided.
[0011]
The paper container molding method will be described. The uneven paper laminate material (11) is mounted between a male mold (32a) and a female mold (32b) of a molding machine (30), and both sides of the molding machine (30). After firmly fixing both ends of the uneven paper laminating material (11) with the fixing jig (31) provided in the female mold (32a), the male mold (32a) is fixed in the female mold (32b) by a hydraulic method, a pneumatic method or the like. With a stress (33). Since the uneven paper laminate material (11) is fixed at both ends by the fixing jigs (31), the uneven paper laminate material (11) is squeezed in a state where the irregularities are stretched and molded. Therefore, even if the uneven paper laminate material (11) is deeply drawn, wrinkles and tears are less likely.
[0012]
The base material layer (1) uses a paperboard having a basis weight of 100 to 500 g / m 2 .
[0013]
The resin used for the thermoplastic resin layer (2) is not particularly limited as long as it is a resin having chemical resistance and moldability, and examples thereof include a polyolefin resin, a polyester resin, and a polyamide resin. , A polyimide resin or the like can be used, and the thickness is preferably in the range of 5 μm to 100 μm.
[0014]
In the method of laminating the thermoplastic resin layer (2), the resin is directly laminated on the base material layer (1) by a known melt extrusion lamination method.
[0015]
FIG. 4A is a side sectional view showing an example of the molded paper container of the present invention, in which a thermoplastic resin layer (2) is laminated on the inner surface of the molded paper container, and FIG. 4B shows another example. FIG. 7 is a side sectional view, in which a thermoplastic resin layer (2) is laminated on the outer surface of a molded paper container, and (c) is a side sectional view showing still another example, in which thermoplastic resin is provided on both surfaces of the molded paper container. The layer (2) is laminated. Since it is molded by the above-described paper container molding method, wrinkles do not occur in the molded paper container even if it is deeply drawn.
[0016]
【Example】
The molded paper container of the present invention will be described with reference to specific examples.
[0017]
<Example 1>
Paper lamination in which a 30 μm-thick polybutylene terephthalate resin is laminated on one surface of a base material layer (1) made of paperboard having a tensile elongation at break of 5% in the flow direction, a tensile elongation at break of 10% in the width direction, and a basis weight of 270 g / m 2. Material (10) was prepared. The paper laminate material (10) is mounted on the embossing device (20) shown in FIG. 3, and the paper laminate material (10) is embossed at a temperature of 120 ° C. by a pair of emboss rolls (20a, 20b) at an emboss pitch of 3.0 mm. Then, embossing was performed to form an irregular shape having an emboss height of 0.7 mm to obtain an uneven paper laminated material (11). The obtained uneven paper laminate material (11) had a tensile elongation at break in the flow direction of 50% and a tensile elongation at break in the width direction of 50%.
[0018]
Subsequently, after punching the uneven paper laminate material (11) into a predetermined shape, the uneven paper laminate material (11) is mounted on a molding machine (30) shown in FIG. After fixing both ends of the male mold with a fixing jig (31), a male mold (32a) at a temperature of 130 ° C. is pressed into a female mold (32b) at the same temperature by a pneumatic method, and has a depth of 5 mm, a width of 50 mm, and a length of 5 mm. A molded paper container of the present invention having a thickness of 100 mm was molded.
[0019]
<Comparative Example 1>
A 30 μm thick polybutylene terephthalate resin is laminated on one side of a paperboard having a tensile elongation at break of 5% in the flow direction, a tensile elongation at break of 10% in the width direction, and a basis weight of 270 g / m 2 to prepare a paper laminating material. A molded paper container for comparison was molded in the same manner as in Example 1 except that the material was punched into a predetermined shape without embossing with a concave and convex shape, mounted on a molding machine (30), and molded.
[0020]
<Comparative Example 2>
A paper laminating material in which a polybutylene terephthalate resin having a thickness of 30 μm is laminated on one side of a paperboard having an unevenness during papermaking with a tensile elongation at break of 20% in the flow direction, a tensile elongation at break of 10% in the width direction, and a basis weight of 270 g / m 2. A prepared molded paper container for comparison was prepared in the same manner as in Example 1 except that the paper laminated material was prepared, punched into a predetermined shape without embossing with a concave and convex shape, mounted on a molding machine (30), and molded. Molded.
[0021]
<Evaluation>
The printability of the paperboard base paper used for the molded paper containers of Example 1 and Comparative Examples 1 and 2, the presence or absence of wrinkles and tears during molding, and the stiffness of the molded paper containers were evaluated. Table 1 shows the results.
[0022]
[Table 1]
Figure 2004017408
[0023]
As shown in Table 1, the molded paper container of Example 1 had good printability of the paperboard base paper used, no wrinkles and tears during molding, and the rigidity of the molded paper container was substantially good. The molded paper container of Comparative Example 1 was defective due to wrinkling and tearing during molding. The molded paper container of Comparative Example 2 had irregularities in the surface of the paperboard base paper used and poor printability, and there was no wrinkle or tear during molding, but the rigidity of the molded paper container was weak.
[0024]
【The invention's effect】
The paper container molding method of the present invention is a paper laminate material obtained by laminating a thermoplastic resin layer on at least one surface of a generally used base material layer made of paperboard. Roughness embossed between the embossing rolls so that the tensile elongation at break in the flow direction becomes 10 to 200% and the tensile elongation at break in the width direction becomes 10 to 200% corresponding to the drawing depth in the thickness direction. Since the paper-shaped laminated material is created, the uneven laminated material is punched into a predetermined shape, attached to a molding machine, the ends are fixed to the molding machine, and then the male mold is pushed into the female mold, and the drawing process is performed. No wrinkles or tears occurred during molding, and the obtained molded paper container had good stiffness. Further, since the paperboard generally used for the base layer was used, the printability on the paperboard base paper was also good.
[Brief description of the drawings]
FIG. 1 is a schematic view showing one example of a paper container molding method of the present invention.
FIG. 2 (a) is a side sectional view showing an example of a paper laminate material used for the molded paper container of the present invention, and FIG. 2 (b) is a side sectional view showing another example of the paper laminate material.
FIG. 3 is a schematic view showing an example of an embossing method.
4A is a side sectional view showing an example of a molded paper container of the present invention, FIG. 4B is a side sectional view showing another example of the molded paper container, and FIG. FIG. 10 is a side sectional view showing still another example of FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Base material layer 2 ... Thermoplastic resin layer 10 ... Paper lamination material 11 ... Concavo-convex paper lamination material 20 ... Embossing device 20a, 20b ... Emboss roll 30 ... Molding machine 31 ... Fixing jig 32a ... Male mold 32b ... Female Mold 33 ... stress

Claims (2)

板紙からなる基材層の少なくとも一方の面に熱可塑性樹脂層を積層した紙積層材料の両面を一対のエンボスロールで挟み込んで厚み方向に絞り深度に対応して流れ方向の引張破断伸びが１０〜２００％、幅方向の引張破断伸びが１０〜２００％になるように凹凸状のエンボス加工を施した凹凸状紙積層材料を成型機の一対の雄雌金型で絞り成型加工することを特徴とする紙容器成型方法。Tensile rupture elongation in the flow direction corresponding to the drawing depth in the thickness direction is sandwiched between a pair of embossing rolls on both sides of a paper laminated material obtained by laminating a thermoplastic resin layer on at least one surface of a base material layer made of paperboard. It is characterized by drawing and forming an uneven paper laminate material having been subjected to uneven embossing so that the tensile elongation at break in the width direction is 200% and the tensile elongation at break in the width direction is 10 to 200% using a pair of male and female molds of a molding machine. Paper container molding method. 請求項１記載の紙容器成型方法で絞り成型加工されたものからなることを特徴とする成型紙容器。A molded paper container formed by drawing and forming by the paper container molding method according to claim 1.
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Cited By (9)

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JP2010264986A (en) * 2009-05-12 2010-11-25 Nakai Shiki Kogyo Kk Method and apparatus for manufacturing paper molded article
JP2011088281A (en) * 2009-10-20 2011-05-06 Pola Chemical Industries Inc Method for producing paper container
WO2013051573A1 (en) * 2011-10-07 2013-04-11 東洋製罐株式会社 Molded paper body with minimal wrinkling and method for manufacturing same
CN104125881A (en) * 2012-01-30 2014-10-29 东洋制罐集团控股株式会社 Paper molding manufacturing method and device therefor
JP2017035892A (en) * 2016-10-25 2017-02-16 東洋製罐株式会社 Manufacturing method of paper mold being less in the occurrence of wrinkles and manufacturing product thereof
JP2017518210A (en) * 2014-05-01 2017-07-06 ジーアールエイト・エンジニアリング・リミテッドＧｒ８ Ｅｎｇｉｎｅｅｒｉｎｇ Ｌｉｍｉｔｅｄ Blow molded container and its manufacture
JP2023038305A (en) * 2017-06-26 2023-03-16 ポール グッドリッチ，デビッド Extension paper, stretched slit packing wrap and use of extension paper in manufacturing space filling product
WO2024062462A3 (en) * 2022-09-23 2024-05-16 Sacmi Cooperativa Meccanici Imola Societa' Cooperativa Method and dose for forming an object with a natural fibre-based material
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Cited By (15)

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Publication number Priority date Publication date Assignee Title
JP2010264986A (en) * 2009-05-12 2010-11-25 Nakai Shiki Kogyo Kk Method and apparatus for manufacturing paper molded article
JP2011088281A (en) * 2009-10-20 2011-05-06 Pola Chemical Industries Inc Method for producing paper container
CN103842167B (en) * 2011-10-07 2016-12-28 东洋制罐集团控股株式会社 Fold produces the manufacture method of few paper molded body
JP2013082109A (en) * 2011-10-07 2013-05-09 Toyo Seikan Kaisha Ltd Paper molding with less wrinkle and production method thereof
RU2579339C2 (en) * 2011-10-07 2016-04-10 Тоё Сэйкан Груп Холдингз, Лтд. Moulded paper body with minimum formation of folds and method for formation thereof
WO2013051573A1 (en) * 2011-10-07 2013-04-11 東洋製罐株式会社 Molded paper body with minimal wrinkling and method for manufacturing same
US10518925B2 (en) 2011-10-07 2019-12-31 Toyo Seikan Group Holdings, Ltd. Molded paper body with minimal wrinkling and forming method thereof
CN104125881A (en) * 2012-01-30 2014-10-29 东洋制罐集团控股株式会社 Paper molding manufacturing method and device therefor
US9630372B2 (en) 2012-01-30 2017-04-25 Toyo Seikan Group Holdings, Ltd. Method of producing pressed paper piece and apparatus therefor
JP2017518210A (en) * 2014-05-01 2017-07-06 ジーアールエイト・エンジニアリング・リミテッドＧｒ８ Ｅｎｇｉｎｅｅｒｉｎｇ Ｌｉｍｉｔｅｄ Blow molded container and its manufacture
JP2017035892A (en) * 2016-10-25 2017-02-16 東洋製罐株式会社 Manufacturing method of paper mold being less in the occurrence of wrinkles and manufacturing product thereof
JP2023038305A (en) * 2017-06-26 2023-03-16 ポール グッドリッチ，デビッド Extension paper, stretched slit packing wrap and use of extension paper in manufacturing space filling product
US11760548B2 (en) 2017-06-26 2023-09-19 David P. Goodrich Extensible paper and its use in the production of expanded slit packaging wrap and void fill products
US12110159B2 (en) 2017-06-26 2024-10-08 HexcelPack, LLC Expanded slit sheet cushioning products with novel slit pattern and paper properties
WO2024062462A3 (en) * 2022-09-23 2024-05-16 Sacmi Cooperativa Meccanici Imola Societa' Cooperativa Method and dose for forming an object with a natural fibre-based material

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