WO2018110488A1 - Paper container and barrel member blank - Google Patents

Paper container and barrel member blank Download PDF

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Publication number
WO2018110488A1
WO2018110488A1 PCT/JP2017/044324 JP2017044324W WO2018110488A1 WO 2018110488 A1 WO2018110488 A1 WO 2018110488A1 JP 2017044324 W JP2017044324 W JP 2017044324W WO 2018110488 A1 WO2018110488 A1 WO 2018110488A1
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WO
WIPO (PCT)
Prior art keywords
resin
paper container
side wall
body end
build
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PCT/JP2017/044324
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French (fr)
Japanese (ja)
Inventor
國廣　一郎
真弘 小川
祥人 久富
太郎 門田
Original Assignee
東洋製罐グループホールディングス株式会社
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Publication of WO2018110488A1 publication Critical patent/WO2018110488A1/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D3/00—Rigid or semi-rigid containers having bodies or peripheral walls of curved or partially-curved cross-section made by winding or bending paper without folding along defined lines
    • B65D3/10—Rigid or semi-rigid containers having bodies or peripheral walls of curved or partially-curved cross-section made by winding or bending paper without folding along defined lines characterised by form of integral or permanently secured end closure
    • B65D3/12—Flanged discs permanently secured, e.g. by adhesives or by heat-sealing
    • B65D3/14—Discs fitting within container end and secured by bending, rolling, or folding operations
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D3/00—Rigid or semi-rigid containers having bodies or peripheral walls of curved or partially-curved cross-section made by winding or bending paper without folding along defined lines
    • B65D3/28—Other details of walls

Definitions

  • the present invention relates to a paper container and a body blank made of a laminate in which a polyester-based resin is laminated on paper, and a body material bonded in a cylindrical shape and a bottom material molded in a cup shape are bonded to each other.
  • a paper molded body mainly composed of paper as a recyclable resource has attracted attention from the viewpoint of environmental load.
  • a paper molded body it is composed of a laminate in which synthetic resin is laminated on paper, and is attached in a cylindrical shape. Paper containers formed by bonding the combined body material and the bottom material molded into a cup shape are widely used in applications such as food and drink containers.
  • the stepped portion is formed on the side of the side seal portion 121 where the circumferential end portions 122 and 123 of the body 120 are overlapped and bonded together.
  • a gap area A having a triangular cross section is formed between the bottom material side wall 132 of the bottom material 130 and the trunk 120.
  • the laminate layers 120b and 130b formed on the surface of the paper are made of a polyethylene resin having a melting point of about 110 ° C. and high fluidity at the time of heating, the laminate layers 120b, Since 130b was melted and the gap region A was blocked by the melted polyethylene resin, the presence of such a gap region A was not a problem.
  • paper containers have come to be used as heat-resistant containers for gratin and doria that are cooked in an oven or the like.
  • a melting point of about 260 ° C.
  • Polyester resin such as PET (polyethylene terephthalate) having a high value may be used.
  • This polyester resin is excellent in heat resistance, but has low fluidity during heating. Therefore, when the laminate layers 120b and 130b are formed from a polyester resin, the laminate layers 120b and 130b are melted by heat during container molding. The function of closing the gap area A cannot be expected.
  • a low melting point resin layer having a low melting point is provided between paper and a laminate layer made of a polyester resin, so that the low melting point resin is heated by heat during container molding. It has been proposed to melt the layer and thereby fill the gap area A (see Patent Document 1).
  • the present invention is to solve these problems, and to provide a paper container and a body blank that reliably prevent leakage of contents through a gap region with a simple configuration and low cost. It is the purpose.
  • the paper container of the present invention is a paper container comprising a laminate obtained by laminating a polyester-based resin on paper, and a body material bonded in a cylindrical shape and a bottom material molded in a cup shape, which are bonded to each other.
  • the material has a first body end disposed on the side seal portion on the side close to the bottom material side wall of the bottom material, and a second body end disposed on the far side, and the bottom material side wall And a gap region is formed between the end portion of the first body and the end portion of the second body, and when the cross-sectional view is at least one place in the extending direction of the gap region, Solves the above problems by filling the resin overlay.
  • the body blank of the present invention is a body blank for a paper container composed of a laminate in which a polyester resin is laminated on paper, and the body blank is disposed on the side close to the bottom wall of the side seal portion.
  • the first body end portion and the second body end portion disposed on the far side, and at the position bonded to the bottom material side wall, facing the bottom material side wall side.
  • the body member includes the first body end portion disposed on the side seal portion on the side close to the bottom member side wall and the second member disposed on the far side.
  • a gap region is formed between the bottom material side wall, the first barrel end, and the second barrel end, and a cross-section at least at one point in the extending direction of the gap region. When viewed, the gap area is filled with the resin overlay, so that the contents of the paper container can be reliably prevented from leaking from the gap area with a simple configuration and low cost.
  • the resin build-up is a thermal spray forming portion provided on the inner surface of the second barrel end portion facing the bottom material side wall
  • the barrel before the barrel is molded into a cylindrical shape
  • a resin overlay is sprayed in advance on a predetermined portion of the inner surface of the second body end portion, and then a bottom material is attached to the lower side of the cylindrically formed body material.
  • the resin build-up can be melted and the gap region can be closed by the resin build-up through a normal molding process in which the body and the bottom material are pressure-bonded.
  • the resin build-up is made of a polyester-based resin or a resin containing a polyester-based resin, so that the bottom material adheres to the body when forming the side seal portion. Since it can suppress that the resin of resin build-up melts or the position of resin build-up changes with the heat
  • the resin build-up is made of a polyester resin having a lower melting point or the same melting point than that of the polyester resin laminated on paper, so that it is applied when the bottom material is bonded to the trunk.
  • the resin build-up can be reliably melted by heat, and the gap region can be closed without a gap.
  • a part of the resin build-up is interposed between the opposing surfaces of the first body end and the second body end so that the required manufacturing accuracy can be achieved. It can be kept low. That is, by providing a resin overlay at a position sandwiched between the first body end and the second body end when the side seal portion is formed, of the inner surface of the second body end, Even when there is a slight deviation in the positional relationship in the circumferential direction between the first body end and the second body end when the first body end and the second body end are overlapped, Since the gap region can be reliably closed by resin overlaying, the required manufacturing accuracy can be kept low.
  • the resin build-up is provided in the gap region on the outer peripheral side of the bottom material side wall, so that the entrance of the gap region facing the storage portion side for the contents of the paper container. Since the gap area can be closed in the vicinity, the penetration of the contents into the gap area can be reliably prevented.
  • the body blank has a first body end portion disposed on the side seal portion on the side close to the bottom wall and a second body end portion disposed on the far side. And having a resin build-up on the inner surface of the end of the second body that faces the bottom material side wall at the position where it is bonded to the bottom material side wall, thereby forming a cylinder.
  • the resin overlay is melted by a normal molding process in which the bottom material is attached to the lower side of the body, heat is applied to the body and the bottom material, and the body and the bottom material are crimped.
  • the region can be closed by resin overlaying. This eliminates the need for processing with high processing difficulty such as processing to the edge of the body blank, which leads to an increase in manufacturing cost, and the amount of resin overlay provided on the inner surface of the second body end. Since the range, material, etc. can be designed freely, the gap region can be closed reliably and at low cost.
  • Sectional drawing which shows the paper container which concerns on one Embodiment of this invention.
  • the top view which shows a trunk blank.
  • Explanatory drawing which shows the cross section of the vicinity of the side seal part of the conventional paper container.
  • the paper container 10 is configured by adhering a bottom material 30 molded in a cup shape to the lower side of a cylindrical body member 20.
  • the body member 20 and the bottom member 30 are respectively formed from laminates in which laminate layers 20 b and 30 b made of polyester resin are provided on the surfaces of base material layers 20 a and 30 a made of paper. Yes.
  • Each laminate layer 20b, 30b is formed on one surface of each substrate layer 20a, 30a facing the container 10a side for the contents of the paper container 10.
  • the body 20 includes a side seal portion 21 in which both ends in the circumferential direction are bonded together, and a first body member disposed on the side seal portion 21 on the side close to the bottom material side wall 32. It has an end 22 and a second body end 23 disposed on the side seal portion 21 on the side far from the bottom member side wall 32, and as shown in FIG. 2, a part of the first body end 22 (Tip part) and a part (tip part) of the second body material end part 23 are thermally bonded to form a cylindrical shape.
  • the trunk 20 has a bottom side adhesive portion 24 bonded to the bottom material side wall 32 on the lower side thereof.
  • the outer peripheral side annular portion 24a disposed on the side, and the inner peripheral side annular portion 24b formed continuously from the lower end of the outer peripheral side annular portion 24a and disposed on the inner peripheral side of the bottom material side wall 32 are provided. .
  • the bottom member 30 has a disk-shaped bottom wall 31 and an annular bottom member side wall 32 that hangs down from the peripheral edge of the bottom wall 31.
  • the resin build-up 40 is made of a polyester-based resin, and, as shown in FIG. 2, on the outer peripheral side of the bottom material side wall 32, the bottom material side wall 32, the first body end portion 22, and the second body end portion 23. And the gap region A having a substantially triangular cross section surrounded by.
  • the gap region A continuously extends along the vertical direction over the outer peripheral side and the inner peripheral side of the bottom material side wall 32. Then, as shown in FIG. 2, the resin overlay 40 is filled in the gap region A when viewed in cross section at least at one location in the extending direction (vertical direction) of the gap region A. The resin build-up 40 is filled so as to block the gap region A at a position near the outer peripheral side of the side wall 32 and near the upper end of the bottom material side wall 32.
  • the illustration of the inner peripheral side of the bottom member side wall 32 is omitted, that is, the inner peripheral side annular portion 24b of the trunk 20 disposed on the inner peripheral side of the bottom member side wall 32.
  • the illustration is omitted.
  • a part of the resin build-up 40 is interposed between the opposing surfaces of the first body end 22 and the second body end 23.
  • the resin build-up 40 is an inner surface (more specifically, the second body end portion 23 arranged facing the bottom material side wall 32 in the state of the body blank 25.
  • a powdery synthetic resin (polyester resin) is formed on the inner surface of the second body end portion 23 disposed facing the bottom material side wall 32 side.
  • the resin build-up 40 is locally formed by spraying.
  • the method for forming the resin build-up 40 will be described more specifically.
  • the laminate layer 20b on the inner surface of the second body end portion 23 where the resin build-up 40 is formed is preheated to the vicinity of the melting point. Later, the powdered synthetic resin is pumped by a pressurized gas, joined to a heated gas (hot air), and sprayed intermittently or continuously. Further, the formation position of the resin build-up 40 will be described more specifically. As shown in FIG. 3, the resin build-up 40 is formed on the first body end 22 of the inner surface of the second body end 23. It is formed at a position straddling the boundary between the part to be overlapped and the part not to be overlapped with the first body material end 22.
  • a part (tip portion) of the first body end portion 22 and the second body end portion is formed by overlapping and crimping a part (tip part) of the part 23, and the body blank 25 is formed into a cylindrical shape.
  • the first body end 22 and the first body end 22 are sandwiched between the first body end 22 and the second body end 23.
  • the second body material end 23 is overlapped.
  • a cup-shaped bottom material 30 is mounted below the cylindrical body material 20, and after heating the body material 20 and the bottom material 30, the bottom material 30 is crimped to the body material 20. To do.
  • the resin build-up 40 is melted by the heat generated when the bottom member 30 is pressure-bonded to the body member 20, and as shown in FIG. A is filled with resin surfacing 40.
  • the specific type of the polyester-based resin constituting the laminate layers 20b and 30b may be any type as long as it has easy adhesion to paper and heat resistance, and examples thereof include PET (polyethylene terephthalate).
  • the resin build-up 40 has been described as being made of a polyester-based resin such as PET (polyethylene terephthalate), but the specific material of the resin build-up 40 is not limited to this, for example,
  • the resin build-up 40 may be formed from a resin containing a polyester resin.
  • the resin build-up 40 is preferably formed using a polyester resin having a lower melting point or the same melting point as that of the polyester resin constituting the laminate layers 20b and 30b.
  • the resin overlay 40 is formed by spraying powdered synthetic resin on the inner surface of the second body end portion 23 in the state of the body blank 25.
  • the method of forming the resin build-up 40 is not limited to the above.
  • the resin build-up 40 is formed on the inner surface of the second body end portion 23 by a hot melt gun, a hot runner unit, an injection unit, a 3D printer, or the like. May be.
  • the resin overlay 40 may be formed by thermocompression-bonding or insert-molding a synthetic resin film or molded member cut into a predetermined shape.
  • the synthetic resin powder to be sprayed may be either a synthetic resin before or after solid-phase polymerization, but more crystallized. It is preferable to spray the synthetic resin before solid phase polymerization having a low degree.
  • the resin build-up 40 is located on the outer peripheral side and the bottom of the bottom member side wall 32 in the gap region A that continues along the vertical direction across the outer peripheral side and the inner peripheral side of the bottom member side wall 32. It demonstrated as what was provided locally near the upper end of the material side wall 32.
  • the formation position and range of the resin build-up 40 are not limited to the above.
  • the resin build-up 40 may be provided in a part of the gap region A on the inner peripheral side of the bottom material side wall 32, and the gap The resin overlay 40 may be provided over the entire region A.
  • a part of the resin overlay 40 is interposed between the opposing surfaces of the first body end 22 and the second body end 23, that is, forms the side seal portion 21.
  • the first body end 22 and the second body end 23 are sandwiched between the first body end 22 and the second body end 23, the first body end 22 and the second body end.
  • the resin overlay 40 may be formed.
  • the body 20 and the bottom material 30 are described as being formed from a laminate in which the base layers 20a and 30a are provided with the laminate layers 20b and 30b.
  • the specific aspect of the laminate constituting the material 30 is not limited to the above.
  • a printing layer or a similar laminate layer is provided on one surface of the base material layer 20a, 30a opposite to the laminate layer 20b, 30b. It may be formed.
  • drum 20 demonstrated as what has the outer peripheral side annular part 24a and the inner peripheral side annular part 24b in embodiment mentioned above, the inner peripheral side annular part 24b is formed. Instead, you may comprise the bottom side adhesion part 24 only from the outer peripheral side annular part 24a.

Abstract

In order to provide a paper container and a barrel member blank which have a simple configuration and low cost, and reliably prevent the leakage of contents through a gap region, this barrel member (20) has a first barrel member end section (22) disposed on a side proximal to a bottom member side wall (32) of a bottom member (30) in a side seal part (21); and a second barrel member end section (23) disposed on a distal side. In this paper container (10), a gap region (A) is formed between the bottom member side wall (32), and the first barrel member end section (22) and the second barrel member end section (23), and when seen in a cross-sectional view from at least one position in the direction in which the gap region (A) extends, the gap region (A) is fully filled with a resin cladding (40).

Description

紙容器および胴材ブランクPaper container and body blank
　本発明は、紙にポリエステル系樹脂をラミネートした積層体から成り、筒状に貼り合わせた胴材とカップ状に成型した底材とを接着して成る紙容器および胴材ブランクに関する。 The present invention relates to a paper container and a body blank made of a laminate in which a polyester-based resin is laminated on paper, and a body material bonded in a cylindrical shape and a bottom material molded in a cup shape are bonded to each other.
　近年、環境負荷の観点から循環型資源としての紙を主体とする紙成形体が注目されており、このような紙成形体として、紙に合成樹脂をラミネートした積層体から成り、筒状に貼り合わせた胴材とカップ状に成型した底材とを接着して成る紙容器が、飲食物用の容器等の用途において広く使用されている。 In recent years, a paper molded body mainly composed of paper as a recyclable resource has attracted attention from the viewpoint of environmental load. As such a paper molded body, it is composed of a laminate in which synthetic resin is laminated on paper, and is attached in a cylindrical shape. Paper containers formed by bonding the combined body material and the bottom material molded into a cup shape are widely used in applications such as food and drink containers.
　このような紙容器では、図４に示すように、胴材１２０の周方向の両端部１２２、１２３を重ねて貼り合わせたサイドシール部１２１の側方に段差部が形成されていることから、サイドシール部１２１の側方において、底材１３０の底材側壁１３２と胴材１２０との間には、断面三角形状の隙間領域Ａが生じることになる。 In such a paper container, as shown in FIG. 4, the stepped portion is formed on the side of the side seal portion 121 where the circumferential end portions 122 and 123 of the body 120 are overlapped and bonded together. On the side of the side seal portion 121, a gap area A having a triangular cross section is formed between the bottom material side wall 132 of the bottom material 130 and the trunk 120.
　ここで、紙の表面に形成されたラミネート層１２０ｂ、１３０ｂが、融点が１１０℃程度であり加熱時における流動性が高いポリエチレン系樹脂から成る場合には、容器成形時の熱によってラミネート層１２０ｂ、１３０ｂが溶融し、溶融したポリエチレン系樹脂によって隙間領域Ａが塞がるため、このような隙間領域Ａの存在が問題になることは無かった。 Here, when the laminate layers 120b and 130b formed on the surface of the paper are made of a polyethylene resin having a melting point of about 110 ° C. and high fluidity at the time of heating, the laminate layers 120b, Since 130b was melted and the gap region A was blocked by the melted polyethylene resin, the presence of such a gap region A was not a problem.
　ところが、近年、紙容器は、オーブン等で加熱調理されるグラタンやドリア等用の耐熱容器としても使用されるようになってきており、この場合、ラミネート層１２０ｂ、１３０ｂとして、２６０℃程度と融点が高いＰＥＴ（ポリエチレンテレフタレート）等のポリエステル系樹脂が用いられることがある。 However, in recent years, paper containers have come to be used as heat-resistant containers for gratin and doria that are cooked in an oven or the like. In this case, as the laminated layers 120b and 130b, a melting point of about 260 ° C. Polyester resin such as PET (polyethylene terephthalate) having a high value may be used.
　このポリエステル系樹脂は、耐熱性に優れる反面、加熱時における流動性が低いため、ラミネート層１２０ｂ、１３０ｂをポリエステル系樹脂から形成した場合、容器成形時の熱によってラミネート層１２０ｂ、１３０ｂを溶融させて隙間領域Ａを塞ぐという機能を期待することはできない。 This polyester resin is excellent in heat resistance, but has low fluidity during heating. Therefore, when the laminate layers 120b and 130b are formed from a polyester resin, the laminate layers 120b and 130b are melted by heat during container molding. The function of closing the gap area A cannot be expected.
　そして、隙間領域Ａが塞がっていない場合、紙容器の内容物が隙間領域Ａを伝い漏れする虞があるため、浸透性の高い食品等へ用途展開することが難しいという問題があった。 Further, when the gap area A is not blocked, there is a possibility that the contents of the paper container may leak through the gap area A, and thus there is a problem that it is difficult to develop the application to food having high permeability.
特開２０１５－２２６８６３号公報JP2015-226863A 特開２０１４－１４１２８２号公報JP 2014-141282 A
　そこで、上述したような問題を解決する一つの案として、紙とポリエステル系樹脂から成るラミネート層との間に、融点の低い低融点樹脂層を設けることにより、容器成形時の熱によって低融点樹脂層を溶融し、これにより、隙間領域Ａを埋めることが提案されている（特許文献１を参照）。 Therefore, as one proposal for solving the above-mentioned problems, a low melting point resin layer having a low melting point is provided between paper and a laminate layer made of a polyester resin, so that the low melting point resin is heated by heat during container molding. It has been proposed to melt the layer and thereby fill the gap area A (see Patent Document 1).
　ところが、この特許文献１に記載の紙容器では、低融点樹脂層を追加で形成する必要があることから、製造コストが増加するばかりでなく、低融点樹脂層がポリエステル系樹脂の内側に形成されていることから、低融点樹脂層の溶融状態にバラツキが生じ易く、その流動を良好に制御することが難しいという問題がある。 However, in the paper container described in Patent Document 1, since it is necessary to additionally form a low melting point resin layer, not only the manufacturing cost increases, but the low melting point resin layer is formed inside the polyester resin. Therefore, there is a problem that the melted state of the low melting point resin layer is likely to vary and it is difficult to control the flow well.
　また、他の解決方法として、胴材ブランクの周方向の一端縁にスカイブヘミング加工を施すことによって、胴材ブランクの一端縁を尖端形状とし、この尖端形状の胴材ブランクの一端縁の外周傾斜面に沿って底材側壁を接着することにより、隙間領域Ａが形成されることを回避することも提案されている（特許文献２を参照）。 As another solution, by applying skive hemming to one end edge in the circumferential direction of the body blank, one end edge of the body blank is made into a pointed shape, and the outer peripheral inclination of the one end edge of the pointed body blank It has also been proposed to avoid the formation of the gap region A by adhering the bottom material side wall along the surface (see Patent Document 2).
　ところが、特許文献２に記載の紙容器では、胴材ブランクの一端縁に加工難易度の高いスカイブヘミング加工を施すことから、製造コストが増加するばかりでなく、胴材ブランクの一端縁の形状にバラツキが生じ易く、隙間領域Ａの形成を良好に回避することは難しいという問題がある。 However, in the paper container described in Patent Document 2, since one end edge of the body blank is subjected to skive hemming with a high degree of processing difficulty, not only the manufacturing cost increases, but also the shape of the end edge of the body blank. There is a problem that variations tend to occur and it is difficult to favorably avoid the formation of the gap region A.
　そこで、本発明は、これらの問題点を解決するものであり、簡素な構成かつ低コストで、隙間領域を通じた内容物の伝い漏れを確実に防止する紙容器および胴材ブランクを提供することを目的とするものである。 Therefore, the present invention is to solve these problems, and to provide a paper container and a body blank that reliably prevent leakage of contents through a gap region with a simple configuration and low cost. It is the purpose.
　本発明の紙容器は、紙にポリエステル系樹脂をラミネートした積層体から成り、筒状に貼り合わせた胴材とカップ状に成型した底材とを接着して成る紙容器であって、前記胴材は、サイドシール部において前記底材の底材側壁に近い側に配置される第１胴材端部と、遠い側に配置される第２胴材端部とを有し、前記底材側壁と前記第１胴材端部と前記第２胴材端部との間には、隙間領域が形成され、前記隙間領域の延在方向における少なくとも一箇所において断面視した場合に、前記隙間領域には樹脂肉盛が充満されていることにより、前記課題を解決するものである。
　本発明の胴材ブランクは、紙にポリエステル系樹脂をラミネートした積層体から成る紙容器用の胴材ブランクであって、前記胴材ブランクは、サイドシール部において底材側壁に近い側に配置される第１胴材端部と、遠い側に配置される第２胴材端部とを有し、前記底材側壁に接着される位置において、前記底材側壁側に面して配置される前記第２胴材端部の内面上に、樹脂肉盛を有することにより、前記課題を解決するものである。 The paper container of the present invention is a paper container comprising a laminate obtained by laminating a polyester-based resin on paper, and a body material bonded in a cylindrical shape and a bottom material molded in a cup shape, which are bonded to each other. The material has a first body end disposed on the side seal portion on the side close to the bottom material side wall of the bottom material, and a second body end disposed on the far side, and the bottom material side wall And a gap region is formed between the end portion of the first body and the end portion of the second body, and when the cross-sectional view is at least one place in the extending direction of the gap region, Solves the above problems by filling the resin overlay.
The body blank of the present invention is a body blank for a paper container composed of a laminate in which a polyester resin is laminated on paper, and the body blank is disposed on the side close to the bottom wall of the side seal portion. The first body end portion and the second body end portion disposed on the far side, and at the position bonded to the bottom material side wall, facing the bottom material side wall side. By having a resin build-up on the inner surface of the second body material end, the above-mentioned problem is solved.
　本請求項１、２に係る発明によれば、胴材は、サイドシール部において底材の底材側壁に近い側に配置される第１胴材端部と、遠い側に配置される第２胴材端部とを有し、底材側壁と第１胴材端部と第２胴材端部との間には、隙間領域が形成され、隙間領域の延在方向における少なくとも一箇所において断面視した場合に、隙間領域には樹脂肉盛が充満されていることにより、簡素な構成かつ低コストで、紙容器の内容物が隙間領域から伝い漏れすることを確実に防止できる。
　また、樹脂肉盛が、底材側壁側に面して配置される第２胴材端部の内面上に設けられた溶射形成部である場合、胴材を筒状に成形する前の胴材ブランクの状態で、第２胴材端部の内面の所定箇所に樹脂肉盛を予め溶射しておき、その後、筒状に成形した胴材の下側に底材を装着し、胴材および底材に熱を加えた後に、胴材および底材を圧着するという通常の成形工程を経ることで、樹脂肉盛を溶融させ、隙間領域を樹脂肉盛によって塞ぐことができる。これにより、胴材ブランクの端縁への加工等の、加工難易度が高く製造コストの増加に繋がる加工を必要とせず、また、第２胴材端部の内面に設けられる樹脂肉盛の量や範囲や材料等を自由に設計することが可能であるため、確実かつ低コストで隙間領域を塞ぐことができる。 According to the first and second aspects of the present invention, the body member includes the first body end portion disposed on the side seal portion on the side close to the bottom member side wall and the second member disposed on the far side. A gap region is formed between the bottom material side wall, the first barrel end, and the second barrel end, and a cross-section at least at one point in the extending direction of the gap region. When viewed, the gap area is filled with the resin overlay, so that the contents of the paper container can be reliably prevented from leaking from the gap area with a simple configuration and low cost.
Further, when the resin build-up is a thermal spray forming portion provided on the inner surface of the second barrel end portion facing the bottom material side wall, the barrel before the barrel is molded into a cylindrical shape In a blank state, a resin overlay is sprayed in advance on a predetermined portion of the inner surface of the second body end portion, and then a bottom material is attached to the lower side of the cylindrically formed body material. After the heat is applied to the material, the resin build-up can be melted and the gap region can be closed by the resin build-up through a normal molding process in which the body and the bottom material are pressure-bonded. This eliminates the need for processing with high processing difficulty such as processing to the edge of the body blank, which leads to an increase in manufacturing cost, and the amount of resin overlay provided on the inner surface of the second body end. Since the range, material, etc. can be designed freely, the gap region can be closed reliably and at low cost.
　本請求項３、５に係る発明によれば、樹脂肉盛が、ポリエステル系樹脂、または、ポリエステル系樹脂を含んだ樹脂から成ることにより、サイドシール部の形成時や胴材に対する底材の接着時に掛かる熱によって、樹脂肉盛の樹脂が溶け落ちたり、樹脂肉盛の位置が変化することを抑制できるため、所望する位置において隙間領域を確実に塞ぐことができる。
　本請求項４に係る発明によれば、樹脂肉盛が、紙にラミネートされたポリエステル系樹脂よりも、低い融点または同じ融点のポリエステル系樹脂から成ることにより、胴材に対する底材の接着時に掛かる熱によって樹脂肉盛を確実に溶融させ、隙間領域を隙間無く塞ぐことができる。
　本請求項６に係る発明によれば、樹脂肉盛の一部が、第１胴材端部および第２胴材端部の対向面間に介在していることにより、要求される製造精度を低く抑えることができる。すなわち、第２胴材端部の内面のうち、サイドシール部の形成時に第１胴材端部および第２胴材端部の間に挟まれる位置にも樹脂肉盛を設けておくことにより、第１胴材端部および第２胴材端部を重ね合わせる時に、第１胴材端部および第２胴材端部の周方向における位置関係に多少のズレが生じた場合であっても、隙間領域を樹脂肉盛によって確実に塞ぐことができるため、要求される製造精度を低く抑えることができる。
　本請求項７に係る発明によれば、樹脂肉盛が、底材側壁の外周側において隙間領域に設けられていることにより、紙容器の内容物用の収容部側に面した隙間領域の入り口付近で、隙間領域を塞ぐことが可能であるため、隙間領域への内容物の染み込みを確実に防止することができる。
　本請求項８に係る発明によれば、胴材ブランクが、サイドシール部において底材側壁に近い側に配置される第１胴材端部と、遠い側に配置される第２胴材端部とを有し、底材側壁に接着される位置において、底材側壁側に面して配置される第２胴材端部の内面上に、樹脂肉盛を有することにより、筒状に成形した胴材の下側に底材を装着し、胴材および底材に熱を加えた後に、胴材および底材を圧着するという通常の成形工程を経ることで、樹脂肉盛を溶融させ、隙間領域を樹脂肉盛によって塞ぐことができる。これにより、胴材ブランクの端縁への加工等の、加工難易度が高く製造コストの増加に繋がる加工を必要とせず、また、第２胴材端部の内面に設けられる樹脂肉盛の量や範囲や材料等を自由に設計することが可能であるため、確実かつ低コストで隙間領域を塞ぐことができる。 According to the inventions according to claims 3 and 5, the resin build-up is made of a polyester-based resin or a resin containing a polyester-based resin, so that the bottom material adheres to the body when forming the side seal portion. Since it can suppress that the resin of resin build-up melts or the position of resin build-up changes with the heat | fever which takes sometimes, it can block | close a clearance gap area | region reliably in the desired position.
According to the fourth aspect of the present invention, the resin build-up is made of a polyester resin having a lower melting point or the same melting point than that of the polyester resin laminated on paper, so that it is applied when the bottom material is bonded to the trunk. The resin build-up can be reliably melted by heat, and the gap region can be closed without a gap.
According to the sixth aspect of the present invention, a part of the resin build-up is interposed between the opposing surfaces of the first body end and the second body end so that the required manufacturing accuracy can be achieved. It can be kept low. That is, by providing a resin overlay at a position sandwiched between the first body end and the second body end when the side seal portion is formed, of the inner surface of the second body end, Even when there is a slight deviation in the positional relationship in the circumferential direction between the first body end and the second body end when the first body end and the second body end are overlapped, Since the gap region can be reliably closed by resin overlaying, the required manufacturing accuracy can be kept low.
According to the seventh aspect of the present invention, the resin build-up is provided in the gap region on the outer peripheral side of the bottom material side wall, so that the entrance of the gap region facing the storage portion side for the contents of the paper container. Since the gap area can be closed in the vicinity, the penetration of the contents into the gap area can be reliably prevented.
According to the eighth aspect of the present invention, the body blank has a first body end portion disposed on the side seal portion on the side close to the bottom wall and a second body end portion disposed on the far side. And having a resin build-up on the inner surface of the end of the second body that faces the bottom material side wall at the position where it is bonded to the bottom material side wall, thereby forming a cylinder. The resin overlay is melted by a normal molding process in which the bottom material is attached to the lower side of the body, heat is applied to the body and the bottom material, and the body and the bottom material are crimped. The region can be closed by resin overlaying. This eliminates the need for processing with high processing difficulty such as processing to the edge of the body blank, which leads to an increase in manufacturing cost, and the amount of resin overlay provided on the inner surface of the second body end. Since the range, material, etc. can be designed freely, the gap region can be closed reliably and at low cost.
本発明の一実施形態に係る紙容器を示す断面図。Sectional drawing which shows the paper container which concerns on one Embodiment of this invention. 図１のＩＩ－ＩＩ線位置で矢印方向に断面視して示す説明図。Explanatory drawing shown in the cross-sectional view in the arrow direction at the II-II line position of FIG. 胴材ブランクを示す平面図。The top view which shows a trunk blank. 従来の紙容器のサイドシール部の近傍を断面視して示す説明図。Explanatory drawing which shows the cross section of the vicinity of the side seal part of the conventional paper container.
　１０　　・・・　紙容器
　１０ａ　・・・　収容部
　２０　　・・・　胴材
　２０ａ　・・・　基材層（紙）
　２０ｂ　・・・　ラミネート層（ポリエステル系樹脂）
　２１　　・・・　サイドシール部
　２２　　・・・　第１胴材端部
　２３　　・・・　第２胴材端部
　２４　　・・・　底側接着部
　２４ａ　・・・　外周側環状部
　２４ｂ　・・・　内周側環状部
　２５　　・・・　胴材ブランク
　３０　　・・・　底材
　３０ａ　・・・　基材層（紙）
　３０ｂ　・・・　ラミネート層（ポリエステル系樹脂）
　３１　　・・・　底面壁
　３２　　・・・　底材側壁
　４０　　・・・　樹脂肉盛
　Ａ　　　・・・　隙間領域 DESCRIPTION OF SYMBOLS 10 ... Paper container 10a ... Storage part 20 ... Body material 20a ... Base material layer (paper)
20b ... Laminate layer (polyester resin)
21 ... Side seal part 22 ... First body end part 23 ... Second body end part 24 ... Bottom adhesive part 24a ... Outer ring part 24b ... Inner ring side Annular part 25 ... Body blank 30 ... Bottom material 30a ... Base material layer (paper)
30b ... Laminate layer (polyester resin)
31 ... Bottom wall 32 ... Bottom material side wall 40 ... Resin overlay A ... Gap area
　以下に、本発明の一実施形態に係る紙容器１０について、図面に基づいて説明する。 Hereinafter, a paper container 10 according to an embodiment of the present invention will be described with reference to the drawings.
　まず、紙容器１０は、図１に示すように、筒状の胴材２０の下側に、カップ状に成型された底材３０を接着することで構成されたものである。 First, as shown in FIG. 1, the paper container 10 is configured by adhering a bottom material 30 molded in a cup shape to the lower side of a cylindrical body member 20.
　胴材２０および底材３０は、図２に示すように、紙から成る基材層２０ａ、３０ａの表面に、ポリエステル系樹脂から成るラミネート層２０ｂ、３０ｂを設けた積層体から、それぞれ形成されている。各ラミネート層２０ｂ、３０ｂは、紙容器１０の内容物用の収容部１０ａ側に面する各基材層２０ａ、３０ａの一面に形成されている。 As shown in FIG. 2, the body member 20 and the bottom member 30 are respectively formed from laminates in which laminate layers 20 b and 30 b made of polyester resin are provided on the surfaces of base material layers 20 a and 30 a made of paper. Yes. Each laminate layer 20b, 30b is formed on one surface of each substrate layer 20a, 30a facing the container 10a side for the contents of the paper container 10.
　胴材２０は、図１や図２に示すように、その周方向の両端を貼り合わせたサイドシール部２１と、サイドシール部２１において底材側壁３２に近い側に配置される第１胴材端部２２と、サイドシール部２１において底材側壁３２に遠い側に配置される第２胴材端部２３とを有し、図２に示すように、第１胴材端部２２の一部（先端部）と第２胴材端部２３の一部（先端部）とを熱接着することで、筒状に成形されている。 As shown in FIG. 1 and FIG. 2, the body 20 includes a side seal portion 21 in which both ends in the circumferential direction are bonded together, and a first body member disposed on the side seal portion 21 on the side close to the bottom material side wall 32. It has an end 22 and a second body end 23 disposed on the side seal portion 21 on the side far from the bottom member side wall 32, and as shown in FIG. 2, a part of the first body end 22 (Tip part) and a part (tip part) of the second body material end part 23 are thermally bonded to form a cylindrical shape.
　また、胴材２０は、図１に示すように、その下側に、底材側壁３２に接着される底側接着部２４を有し、この底側接着部２４は、底材側壁３２の外周側に配置される外周側環状部２４ａと、外周側環状部２４ａの下端に連続して形成され、底材側壁３２の内周側に配置される内周側環状部２４ｂとを有している。 Further, as shown in FIG. 1, the trunk 20 has a bottom side adhesive portion 24 bonded to the bottom material side wall 32 on the lower side thereof. The outer peripheral side annular portion 24a disposed on the side, and the inner peripheral side annular portion 24b formed continuously from the lower end of the outer peripheral side annular portion 24a and disposed on the inner peripheral side of the bottom material side wall 32 are provided. .
　底材３０は、図１に示すように、円盤状の底面壁３１と、底面壁３１の周縁部から垂下した環状の底材側壁３２とを有している。 As shown in FIG. 1, the bottom member 30 has a disk-shaped bottom wall 31 and an annular bottom member side wall 32 that hangs down from the peripheral edge of the bottom wall 31.
　次に、本発明の特徴部である樹脂肉盛４０について、以下に説明する。 Next, the resin build-up 40, which is a feature of the present invention, will be described below.
　まず、樹脂肉盛４０は、ポリエステル系樹脂から成り、図２に示すように、底材側壁３２の外周側において、底材側壁３２と第１胴材端部２２と第２胴材端部２３とで囲まれた、断面略三角形状の隙間領域Ａを塞ぐものである。 First, the resin build-up 40 is made of a polyester-based resin, and, as shown in FIG. 2, on the outer peripheral side of the bottom material side wall 32, the bottom material side wall 32, the first body end portion 22, and the second body end portion 23. And the gap region A having a substantially triangular cross section surrounded by.
　具体的に説明すると、まず、隙間領域Ａは、底材側壁３２の外周側および内周側に亘って上下方向に沿って連続して延在している。そして、図２に示すように、隙間領域Ａの延在方向（上下方向）における少なくとも一箇所において断面視した場合に、隙間領域Ａに樹脂肉盛４０が充満され、本実施形態では、底材側壁３２の外周側かつ底材側壁３２の上端付近の位置において、樹脂肉盛４０が隙間領域Ａを塞ぐように充満されている。 More specifically, first, the gap region A continuously extends along the vertical direction over the outer peripheral side and the inner peripheral side of the bottom material side wall 32. Then, as shown in FIG. 2, the resin overlay 40 is filled in the gap region A when viewed in cross section at least at one location in the extending direction (vertical direction) of the gap region A. The resin build-up 40 is filled so as to block the gap region A at a position near the outer peripheral side of the side wall 32 and near the upper end of the bottom material side wall 32.
　なお、図２に示す説明図においては、底材側壁３２の内周側の図示を省略し、すなわち、底材側壁３２の内周側に配置された胴材２０の内周側環状部２４ｂの図示を省略している。 2, the illustration of the inner peripheral side of the bottom member side wall 32 is omitted, that is, the inner peripheral side annular portion 24b of the trunk 20 disposed on the inner peripheral side of the bottom member side wall 32. The illustration is omitted.
　また、樹脂肉盛４０の一部は、図２に示すように、第１胴材端部２２および第２胴材端部２３の対向面間に介在している。 Further, as shown in FIG. 2, a part of the resin build-up 40 is interposed between the opposing surfaces of the first body end 22 and the second body end 23.
　また、樹脂肉盛４０は、詳しくは後述するように、胴材ブランク２５の状態で、底材側壁３２側に面して配置される第２胴材端部２３の内面（更に具体的には、第２胴材端部２３の内面側のラミネート層２０ｂ）上に、粉末状の合成樹脂（ポリエステル系樹脂）を溶射を施すことで設けられた溶射形成部として形成されている。 Further, as will be described in detail later, the resin build-up 40 is an inner surface (more specifically, the second body end portion 23 arranged facing the bottom material side wall 32 in the state of the body blank 25. On the laminate layer 20b) on the inner surface side of the second body end portion 23, it is formed as a spray forming portion provided by spraying a powdered synthetic resin (polyester resin).
　次に、本実施形態の紙容器１０の製造方法を以下に説明する。 Next, a method for manufacturing the paper container 10 of the present embodiment will be described below.
　まず、図３に示すように、胴材ブランク２５の状態で、底材側壁３２側に面して配置される第２胴材端部２３の内面に、粉末状の合成樹脂（ポリエステル系樹脂）を溶射することにより、樹脂肉盛４０を局所的に形成する。 First, as shown in FIG. 3, in the state of the body blank 25, a powdery synthetic resin (polyester resin) is formed on the inner surface of the second body end portion 23 disposed facing the bottom material side wall 32 side. The resin build-up 40 is locally formed by spraying.
　なお、樹脂肉盛４０の形成方法について更に具体的に説明すると、本実施形態では、樹脂肉盛４０が形成される第２胴材端部２３の内面のラミネート層２０ｂを融点近傍まで予備加熱した後に、粉末状の合成樹脂を加圧ガスにより圧送し、加熱ガス（熱風）に合流させて、間欠的又は連続的に溶射する。
　また、樹脂肉盛４０の形成位置について更に具体的に説明すると、図３に示すように、樹脂肉盛４０は、第２胴材端部２３の内面のうち、第１胴材端部２２に重ねられる部分と第１胴材端部２２に重ねられない部分との間の境界部を跨ぐ位置に形成される。 The method for forming the resin build-up 40 will be described more specifically. In this embodiment, the laminate layer 20b on the inner surface of the second body end portion 23 where the resin build-up 40 is formed is preheated to the vicinity of the melting point. Later, the powdered synthetic resin is pumped by a pressurized gas, joined to a heated gas (hot air), and sprayed intermittently or continuously.
Further, the formation position of the resin build-up 40 will be described more specifically. As shown in FIG. 3, the resin build-up 40 is formed on the first body end 22 of the inner surface of the second body end 23. It is formed at a position straddling the boundary between the part to be overlapped and the part not to be overlapped with the first body material end 22.
　次に、第２胴材端部２３を加熱して第２胴材端部２３のラミネート層２０ｂを溶かした後、第１胴材端部２２の一部（先端部）と第２胴材端部２３の一部（先端部）とを重ねて圧着することにより、サイドシール部２１を形成し、胴材ブランク２５を筒状に成形する。 Next, after heating the second body end portion 23 to melt the laminate layer 20b of the second body end portion 23, a part (tip portion) of the first body end portion 22 and the second body end The side seal part 21 is formed by overlapping and crimping a part (tip part) of the part 23, and the body blank 25 is formed into a cylindrical shape.
　この際、図２に示すように、第１胴材端部２２と第２胴材端部２３との間に、樹脂肉盛４０の一部が挟まるように、第１胴材端部２２と第２胴材端部２３とを重ねる。 At this time, as shown in FIG. 2, the first body end 22 and the first body end 22 are sandwiched between the first body end 22 and the second body end 23. The second body material end 23 is overlapped.
　次に、図１に示すように、筒状の胴材２０の下方にカップ状の底材３０を装着し、胴材２０および底材３０を加熱した後、胴材２０に底材３０を圧着する。 Next, as shown in FIG. 1, a cup-shaped bottom material 30 is mounted below the cylindrical body material 20, and after heating the body material 20 and the bottom material 30, the bottom material 30 is crimped to the body material 20. To do.
　この際、胴材２０に底材３０を圧着する際の熱によって、樹脂肉盛４０が溶融し、図２に示すように、当該底材側壁３２の上端付近において断面視した場合に、隙間領域Ａに樹脂肉盛４０が充満する。 At this time, the resin build-up 40 is melted by the heat generated when the bottom member 30 is pressure-bonded to the body member 20, and as shown in FIG. A is filled with resin surfacing 40.
　以上、本発明の実施形態を詳述したが、本発明は上記実施形態に限定されるものではなく、請求の範囲に記載された本発明を逸脱することなく種々の設計変更を行なうことが可能である。 Although the embodiments of the present invention have been described in detail above, the present invention is not limited to the above-described embodiments, and various design changes can be made without departing from the present invention described in the claims. It is.
　例えば、ラミネート層２０ｂ、３０ｂを構成するポリエステル系樹脂の具体的種類としては、紙に対する易接着性や耐熱性を有するものであれば如何なるものでもよく、例えば、ＰＥＴ（ポリエチレンテレフタレート）が挙げられる。 For example, the specific type of the polyester-based resin constituting the laminate layers 20b and 30b may be any type as long as it has easy adhesion to paper and heat resistance, and examples thereof include PET (polyethylene terephthalate).
　また、上述した実施形態では、樹脂肉盛４０が、ＰＥＴ（ポリエチレンテレフタレート）等のポリエステル系樹脂から成るものとして説明したが、樹脂肉盛４０の具体的な材料はこれに限定されず、例えば、ポリエステル系樹脂を含んだ樹脂から樹脂肉盛４０を形成してもよい。
　また、樹脂肉盛４０は、ラミネート層２０ｂ、３０ｂを構成するポリエステル系樹脂よりも、低い融点または同じ融点のポリエステル系樹脂を材料として形成するのが好ましい。 Further, in the embodiment described above, the resin build-up 40 has been described as being made of a polyester-based resin such as PET (polyethylene terephthalate), but the specific material of the resin build-up 40 is not limited to this, for example, The resin build-up 40 may be formed from a resin containing a polyester resin.
The resin build-up 40 is preferably formed using a polyester resin having a lower melting point or the same melting point as that of the polyester resin constituting the laminate layers 20b and 30b.
　また、上述した実施形態では、胴材ブランク２５の状態で、第２胴材端部２３の内面に、粉末状の合成樹脂を溶射することにより、樹脂肉盛４０を形成するものとして説明したが、樹脂肉盛４０の形成方法は上記に限定されず、例えば、ホットメルトガン、ホットランナーユニット、射出ユニット、３Ｄプリンタ等によって、第２胴材端部２３の内面に樹脂肉盛４０を形成してもよい。また、所定の形状に切り抜いた合成樹脂製のフィルムや成形部材を熱圧着したりインサート成形したりすることにより、樹脂肉盛４０を形成してもよい。 In the above-described embodiment, the resin overlay 40 is formed by spraying powdered synthetic resin on the inner surface of the second body end portion 23 in the state of the body blank 25. The method of forming the resin build-up 40 is not limited to the above. For example, the resin build-up 40 is formed on the inner surface of the second body end portion 23 by a hot melt gun, a hot runner unit, an injection unit, a 3D printer, or the like. May be. Further, the resin overlay 40 may be formed by thermocompression-bonding or insert-molding a synthetic resin film or molded member cut into a predetermined shape.
　なお、粉末状の合成樹脂を溶射することで樹脂肉盛４０を形成する場合、溶射する合成樹脂の粉末は、固相重合前または固相重合後の合成樹脂のいずれでもよいが、より結晶化度が低い固相重合前の合成樹脂を溶射するほうが好ましい。 When the resin overlay 40 is formed by spraying a powdered synthetic resin, the synthetic resin powder to be sprayed may be either a synthetic resin before or after solid-phase polymerization, but more crystallized. It is preferable to spray the synthetic resin before solid phase polymerization having a low degree.
　また、上述した実施形態では、樹脂肉盛４０が、底材側壁３２の外周側および内周側に亘って上下方向に沿って連続する隙間領域Ａのうち、底材側壁３２の外周側かつ底材側壁３２の上端付近に局所的に設けられているものとして説明した。しかしながら、樹脂肉盛４０の形成位置および範囲については、上記に限定されず、例えば、隙間領域Ａのうち底材側壁３２の内周側の一部分に樹脂肉盛４０を設けてよく、また、隙間領域Ａの全域に亘って樹脂肉盛４０を設けてもよい。 Further, in the above-described embodiment, the resin build-up 40 is located on the outer peripheral side and the bottom of the bottom member side wall 32 in the gap region A that continues along the vertical direction across the outer peripheral side and the inner peripheral side of the bottom member side wall 32. It demonstrated as what was provided locally near the upper end of the material side wall 32. FIG. However, the formation position and range of the resin build-up 40 are not limited to the above. For example, the resin build-up 40 may be provided in a part of the gap region A on the inner peripheral side of the bottom material side wall 32, and the gap The resin overlay 40 may be provided over the entire region A.
　また、上述した実施形態では、樹脂肉盛４０の一部が、第１胴材端部２２および第２胴材端部２３の対向面間に介在している、すなわち、サイドシール部２１を形成する際に、第１胴材端部２２と第２胴材端部２３との間に樹脂肉盛４０の一部を挟んだ状態で、第１胴材端部２２と第２胴材端部２３とを重ねて熱接着するものとして説明したが、樹脂肉盛４０の一部を第１胴材端部２２および第２胴材端部２３の対向面間に介在させることは必須の構成ではない。すなわち、胴材ブランク２５の状態で、第２胴材端部２３の内面のうち、第１胴材端部２２に重ねられる部分に隣接するとともに第１胴材端部２２に重ねられない部分のみに、樹脂肉盛４０を形成してもよい。 In the above-described embodiment, a part of the resin overlay 40 is interposed between the opposing surfaces of the first body end 22 and the second body end 23, that is, forms the side seal portion 21. When the first body end 22 and the second body end 23 are sandwiched between the first body end 22 and the second body end 23, the first body end 22 and the second body end. However, it is essential to interpose a part of the resin overlay 40 between the opposing surfaces of the first body end 22 and the second body end 23. Absent. That is, in the state of the body blank 25, only the portion of the inner surface of the second body end portion 23 that is adjacent to the portion that overlaps the first body end portion 22 and that is not overlapped with the first body end portion 22. Alternatively, the resin overlay 40 may be formed.
　また、上述した実施形態では、胴材２０および底材３０が、基材層２０ａ、３０ａにラミネート層２０ｂ、３０ｂを設けた積層体から形成されているものとして説明したが、胴材２０および底材３０を構成する積層体の具体的態様は、上記に限定されず、例えば、ラミネート層２０ｂ、３０ｂとは反対側の基材層２０ａ、３０ａの一面に、印字層や同様のラミネート層等を形成してもよい。 In the above-described embodiment, the body 20 and the bottom material 30 are described as being formed from a laminate in which the base layers 20a and 30a are provided with the laminate layers 20b and 30b. The specific aspect of the laminate constituting the material 30 is not limited to the above. For example, a printing layer or a similar laminate layer is provided on one surface of the base material layer 20a, 30a opposite to the laminate layer 20b, 30b. It may be formed.
　また、上述した実施形態では、胴材２０の底側接着部２４が、外周側環状部２４ａおよび内周側環状部２４ｂを有しているものとして説明したが、内周側環状部２４ｂを形成せず、底側接着部２４を外周側環状部２４ａのみから構成してもよい。 Moreover, although the bottom side adhesion part 24 of the trunk | drum 20 demonstrated as what has the outer peripheral side annular part 24a and the inner peripheral side annular part 24b in embodiment mentioned above, the inner peripheral side annular part 24b is formed. Instead, you may comprise the bottom side adhesion part 24 only from the outer peripheral side annular part 24a.

Claims (8)

  1. 　紙にポリエステル系樹脂をラミネートした積層体から成り、筒状に貼り合わせた胴材とカップ状に成型した底材とを接着して成る紙容器であって、
    　前記胴材は、サイドシール部において前記底材の底材側壁に近い側に配置される第１胴材端部と、遠い側に配置される第２胴材端部とを有し、
    　前記底材側壁と前記第１胴材端部と前記第２胴材端部との間には、隙間領域が形成され、
    　前記隙間領域の延在方向における少なくとも一箇所において断面視した場合に、前記隙間領域には樹脂肉盛が充満されていることを特徴とする紙容器。     A paper container composed of a laminate in which a polyester resin is laminated on paper, and is formed by adhering a cylindrical body and a base material molded into a cup,
    The body has a first body end disposed on the side seal portion on the side close to the bottom wall of the bottom, and a second body end disposed on the far side,
    A gap region is formed between the bottom material side wall, the first body end, and the second body end,
    The paper container, wherein the gap area is filled with a resin overlay when viewed in cross section at least at one location in the extending direction of the gap area.
  2. 　前記樹脂肉盛は、前記底材側壁側に面して配置される前記第２胴材端部の内面上に設けられた溶射形成部であることを特徴とする請求項１に記載の紙容器。 2. The paper container according to claim 1, wherein the resin build-up is a thermal spray forming portion provided on an inner surface of the end portion of the second body member facing the side wall side of the bottom material. .
  3. 　前記樹脂肉盛が、ポリエステル系樹脂から成ることを特徴とする請求項１または請求項２に記載の紙容器。 The paper container according to claim 1 or 2, wherein the resin overlay is made of a polyester resin.
  4. 　前記樹脂肉盛が、前記紙にラミネートされたポリエステル系樹脂よりも、低い融点または同じ融点のポリエステル系樹脂から成ることを特徴とする請求項３に記載の紙容器。 4. The paper container according to claim 3, wherein the resin build-up is made of a polyester resin having a melting point lower than or equal to that of the polyester resin laminated on the paper.
  5. 　前記樹脂肉盛が、ポリエステル系樹脂を含んだ樹脂から成ることを特徴とする請求項１または請求項２に記載の紙容器。 The paper container according to claim 1 or 2, wherein the resin build-up is made of a resin containing a polyester resin.
  6. 　前記樹脂肉盛の一部は、前記第１胴材端部および前記第２胴材端部の対向面間に介在していることを特徴とする請求項１乃至請求項５のいずれかに記載の紙容器。 The part of the resin build-up is interposed between opposing surfaces of the first body material end and the second body material end, according to any one of claims 1 to 5. Paper container.
  7. 　前記樹脂肉盛は、前記底材側壁の外周側において、前記隙間領域に設けられていることを特徴とする請求項１乃至請求項６のいずれかに記載の紙容器。 The paper container according to any one of claims 1 to 6, wherein the resin build-up is provided in the gap region on an outer peripheral side of the bottom material side wall.
  8. 　紙にポリエステル系樹脂をラミネートした積層体から成る紙容器用の胴材ブランクであって、
    　前記胴材ブランクは、サイドシール部において底材側壁に近い側に配置される第１胴材端部と、遠い側に配置される第２胴材端部とを有し、
    　前記底材側壁に接着される位置において、前記底材側壁側に面して配置される前記第２胴材端部の内面上に、樹脂肉盛を有することを特徴とする胴材ブランク。     A body blank for a paper container comprising a laminate in which a polyester resin is laminated on paper,
    The body blank has a first body end disposed on the side seal portion on the side close to the bottom material side wall, and a second body end disposed on the far side,
    A body blank having a resin build-up on an inner surface of the second body end portion disposed facing the bottom material side wall at a position bonded to the bottom material side wall.
PCT/JP2017/044324 2016-12-15 2017-12-11 Paper container and barrel member blank WO2018110488A1 (en)

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US11767436B2 (en) 2018-08-01 2023-09-26 The Boeing Company Thermal and cold spray plastic coating covering vehicle fasteners inside fuel tank for lightning strike and other electromagnetic protection
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