JPH11268781A - Heat insulation paper-cup - Google Patents
Heat insulation paper-cupInfo
- Publication number
- JPH11268781A JPH11268781A JP10090597A JP9059798A JPH11268781A JP H11268781 A JPH11268781 A JP H11268781A JP 10090597 A JP10090597 A JP 10090597A JP 9059798 A JP9059798 A JP 9059798A JP H11268781 A JPH11268781 A JP H11268781A
- Authority
- JP
- Japan
- Prior art keywords
- paper
- paper cup
- layer
- resin layer
- thermoplastic resin
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000009413 insulation Methods 0.000 title abstract description 12
- 229920005992 thermoplastic resin Polymers 0.000 claims abstract description 55
- 229920005989 resin Polymers 0.000 claims abstract description 28
- 239000011347 resin Substances 0.000 claims abstract description 28
- 238000007639 printing Methods 0.000 claims abstract description 13
- 238000004804 winding Methods 0.000 claims description 30
- 239000006260 foam Substances 0.000 claims description 15
- 230000002093 peripheral effect Effects 0.000 claims description 2
- 239000000758 substrate Substances 0.000 claims 1
- 239000000463 material Substances 0.000 abstract description 29
- 230000000694 effects Effects 0.000 abstract description 7
- 230000014759 maintenance of location Effects 0.000 abstract description 6
- 229920001169 thermoplastic Polymers 0.000 abstract description 5
- 239000004416 thermosoftening plastic Substances 0.000 abstract description 5
- 101100327917 Caenorhabditis elegans chup-1 gene Proteins 0.000 abstract description 3
- 239000000203 mixture Substances 0.000 abstract description 2
- 239000000123 paper Substances 0.000 description 138
- 239000010410 layer Substances 0.000 description 113
- 238000000034 method Methods 0.000 description 23
- 238000005187 foaming Methods 0.000 description 16
- 229920013716 polyethylene resin Polymers 0.000 description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 8
- 229920001903 high density polyethylene Polymers 0.000 description 7
- 239000004700 high-density polyethylene Substances 0.000 description 7
- 229920001577 copolymer Polymers 0.000 description 6
- 238000010438 heat treatment Methods 0.000 description 6
- 238000010030 laminating Methods 0.000 description 6
- 229920001684 low density polyethylene Polymers 0.000 description 6
- 239000004702 low-density polyethylene Substances 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 6
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 4
- 239000005977 Ethylene Substances 0.000 description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 4
- 229910052782 aluminium Inorganic materials 0.000 description 4
- 238000007765 extrusion coating Methods 0.000 description 4
- 239000011888 foil Substances 0.000 description 4
- 238000000465 moulding Methods 0.000 description 4
- 235000014347 soups Nutrition 0.000 description 4
- -1 polyethylene Polymers 0.000 description 3
- 229920005990 polystyrene resin Polymers 0.000 description 3
- 239000004716 Ethylene/acrylic acid copolymer Substances 0.000 description 2
- 235000015429 Mirabilis expansa Nutrition 0.000 description 2
- 244000294411 Mirabilis expansa Species 0.000 description 2
- 239000004743 Polypropylene Substances 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- QHZOMAXECYYXGP-UHFFFAOYSA-N ethene;prop-2-enoic acid Chemical compound C=C.OC(=O)C=C QHZOMAXECYYXGP-UHFFFAOYSA-N 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- 235000013305 food Nutrition 0.000 description 2
- 229920000554 ionomer Polymers 0.000 description 2
- 229920000092 linear low density polyethylene Polymers 0.000 description 2
- 239000004707 linear low-density polyethylene Substances 0.000 description 2
- 229920001179 medium density polyethylene Polymers 0.000 description 2
- 239000004701 medium-density polyethylene Substances 0.000 description 2
- 235000013536 miso Nutrition 0.000 description 2
- 229920001225 polyester resin Polymers 0.000 description 2
- 239000004645 polyester resin Substances 0.000 description 2
- 229920001155 polypropylene Polymers 0.000 description 2
- 229920000915 polyvinyl chloride Polymers 0.000 description 2
- 239000004800 polyvinyl chloride Substances 0.000 description 2
- 238000004080 punching Methods 0.000 description 2
- 235000021487 ready-to-eat food Nutrition 0.000 description 2
- 229920003002 synthetic resin Polymers 0.000 description 2
- 239000000057 synthetic resin Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 229920006248 expandable polystyrene Polymers 0.000 description 1
- 239000004794 expanded polystyrene Substances 0.000 description 1
- 239000004088 foaming agent Substances 0.000 description 1
- 238000007646 gravure printing Methods 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000011087 paperboard Substances 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920005672 polyolefin resin Polymers 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
Landscapes
- Packages (AREA)
- Laminated Bodies (AREA)
- Package Specialized In Special Use (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、ラーメン、スー
プ、味噌汁などの即席食品用の容器として使用される断
熱性を有する紙カップに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat-insulating paper cup used as a container for ready-to-eat foods such as ramen, soup and miso soup.
【０００２】[0002]
【従来の技術】従来より、ラーメン、スープ、味噌汁な
どの即席食品用の容器として使用される断熱性を有する
容器としては、発泡性を持つ合成樹脂、とくに発泡ポリ
スチレン樹脂を原料とするものが、多く使用されてい
る。また、断熱性を有する紙カップとしては、紙カップ
の全周に波形状などの紙製の胴巻きをした形のもの、あ
るいは内側と外側の二重構造とし、二層間に空間を持た
せた形のもの、そして、紙の両面をポリエチレン樹脂層
で積層された材料を使用した紙カップの表面のポリエチ
レン樹脂層を発泡させたものなどがある。2. Description of the Related Art Conventionally, as a container having heat insulating properties used as a container for ready-to-eat foods such as ramen, soup, miso soup, etc., a synthetic resin having a foaming property, in particular, a foamed polystyrene resin as a raw material, Many are used. In addition, as a paper cup having heat insulation, a paper cup with a corrugated shape around the entire circumference of the paper cup, or a double-layered inner and outer structure with a space between two layers. There is a paper cup made of a material obtained by laminating a polyethylene resin layer on both sides of a paper, and a foamed polyethylene resin layer on the surface of a paper cup.
【０００３】[0003]
【発明が解決しようとする課題】しかし、前述の断熱性
を有する容器において、発泡ポリスチレン樹脂による容
器は、発泡剤を加えた樹脂を成形加工することによって
製造され、断熱性では優れているが、使用後、廃棄物と
して処理しにくく、環境対応の点で問題がある。また、
表面の平滑性が低く、印刷適性に劣るなどの欠点もあ
る。However, among the above-mentioned containers having heat insulating properties, containers made of expanded polystyrene resin are manufactured by molding a resin to which a foaming agent is added, and are excellent in heat insulating properties. After use, it is difficult to dispose as waste, and there is a problem in terms of environmental measures. Also,
There are also drawbacks such as low surface smoothness and poor printability.
【０００４】また、全周に波形状などの紙製の胴巻きを
した形の紙カップは、断熱性、および環境対応の点では
優れているが、製造上、胴巻き部を波形状にし、本体に
巻き付ける工程が必要で、技術的難しさがあり、コスト
高になっている。[0004] A paper cup having a wavy shape such as a corrugated paper is excellent in terms of heat insulation and environmental friendliness. However, in terms of manufacturing, the corrugated portion is corrugated and wound around the main body. It requires a process, is technically difficult, and is costly.
【０００５】これらの断熱性カップに対して、断熱性が
あり、印刷適性があり、使用後は廃棄物として捨てやす
く、そして製造工程が簡単でコストが安いという特徴を
もったものが、表面のポリエチレン樹脂層を発泡させた
紙カップである。この発泡紙カップは、特公昭４８−３
２２８３号公報にある、ポリエチレン樹脂加工紙を加熱
し、紙の含有水分の蒸気圧により、表面のポリエチレン
樹脂層を発泡させ、凹凸模様を製造する方法を応用した
ものである。特開昭５７−１１０４３９号公報では、胴
部材の片側壁面が熱可塑性合成樹脂フィルムの発泡層が
コーティングまたはラミネートされている胴部材および
底板部材から成る紙製容器として、その紙カップへの応
用が開示されている。さらに、特開平５−５０５３６号
公報、特開平７−２３２７７４号公報では、ポリオレフ
ィン系樹脂層と紙を主体とする基材層との間に、着色イ
ンキによる印刷層を有する断熱性紙容器として、印刷部
分で厚い発泡層を持たせる製造方法を開示している。[0005] These heat-insulating cups are characterized in that they have heat insulating properties, are printable, are easy to be discarded as waste after use, and have a simple and inexpensive manufacturing process. This is a paper cup in which a polyethylene resin layer is foamed. This foamed paper cup is manufactured by
No. 2,283, the method of heating a polyethylene resin-processed paper, foaming the polyethylene resin layer on the surface by the vapor pressure of the water content of the paper, and applying a method of manufacturing an uneven pattern. JP-A-57-110439 discloses an application to a paper cup as a paper container comprising a body member and a bottom plate member in which one side wall surface of a body member is coated or laminated with a foamed layer of a thermoplastic synthetic resin film. Have been. Further, JP-A-5-50536 and JP-A-7-232774 disclose heat-insulating paper containers having a printing layer made of colored ink between a polyolefin-based resin layer and a base layer mainly composed of paper. A manufacturing method for providing a thick foam layer in a printed portion is disclosed.
【０００６】しかし、従来の発泡紙カップでは断熱性が
充分とはいえず、飲料用紙カップでは良いものの、特に
即席食品用紙カップなどにおいては、充分とはいえな
い。また、即席食品用紙カップは、一般的に容量も大き
く、取り扱い時の保形性が充分にあることが必要であ
り、二重構造ではない単層の発泡紙カップでは、充分な
強度を有していない。さらに、印刷された絵柄や文字な
どが、発泡した表面層により損なわれるという欠点があ
る。これに対して本発明は、断熱性が充分あり、取り扱
い時の保形性が充分にあり、外観上の印刷効果もあり、
そして比較的安いコストで製造が可能な断熱性紙カップ
を提供する。However, conventional foamed paper cups cannot be said to have sufficient heat insulating properties, and although drinkable paper cups are good, in particular, instant food paper cups are not sufficient. In addition, instant food paper cups generally have a large capacity and need to have sufficient shape retention during handling, and a single-layer foamed paper cup that does not have a double structure has sufficient strength. Absent. Furthermore, there is a disadvantage that printed pictures and characters are damaged by the foamed surface layer. On the other hand, the present invention has sufficient heat insulating properties, has sufficient shape retention during handling, and has a printing effect on appearance,
Further, the present invention provides a heat-insulating paper cup which can be manufactured at a relatively low cost.
【０００７】[0007]
【課題を解決するための手段】上記のような課題を解決
すべく検討した結果、本発明は、胴部と底部とからなる
紙カップ本体と、該紙カップ本体の胴部の外周に嵌合し
た紙巻き部とから構成された紙カップであって、前記紙
カップ本体は、少なくとも外面側から順次、熱可塑性樹
脂（表面）が発泡した発泡層、紙を主体とする基材層お
よび熱可塑性樹脂層（裏面）とを備え、また、前記紙巻
き部は、少なくとも外面側から順次、熱可塑性樹脂（表
面）、紙を主体とする基材層および熱可塑性樹脂層（裏
面）が発泡した発泡層とを備えたことを特徴とする断熱
性紙カップを要旨とする。As a result of studying to solve the above problems, the present invention provides a paper cup body comprising a body and a bottom, and a paper roll fitted on the outer periphery of the body of the paper cup body. And a paper cup main body, wherein the paper cup main body is, at least sequentially from the outer surface side, a foamed layer in which a thermoplastic resin (front surface) is foamed, a base layer mainly composed of paper, and a thermoplastic resin layer (back surface). And the paper winding unit includes a thermoplastic resin (front surface), a base layer mainly composed of paper, and a foamed layer in which the thermoplastic resin layer (back surface) is foamed at least sequentially from the outer surface side. The gist of the invention is a heat-insulating paper cup.
【０００８】また、前記紙カップ本体の前記発泡層は、
この一部分を他の部分より突出した凸部に形成してもよ
く、この形態では、前記紙カップ本体と前記紙巻き部と
を嵌合した際に、前記紙カップ本体の胴部と前記紙巻き
部との間に間隙を形成され断熱効果の高い断熱性紙カッ
プを得ることができる。この場合には、前記紙カップ本
体の胴部において、前記発泡層と前記基材層との間に部
分的に印刷層を設け、該印刷層に重なる前記発泡層の部
分に、前記凸部を形成する。そして、前記凸部が、前記
紙カップ本体の胴部の外周方向に連続状に形成されたこ
と、前記紙カップ本体の胴部の上下方向に形成されたこ
と、前記凸部の数が、複数であることを特徴とする。[0008] The foam layer of the paper cup body may include:
This part may be formed as a protruding part projecting from the other part. In this embodiment, when the paper cup body and the paper winding part are fitted, the part between the body part of the paper cup main body and the paper winding part is formed. Thus, a heat insulating paper cup having a high heat insulating effect can be obtained. In this case, a printing layer is partially provided between the foam layer and the base material layer on the body of the paper cup body, and the protrusion is formed on a portion of the foam layer overlapping the print layer. I do. The convex portion is formed continuously in the outer peripheral direction of the body portion of the paper cup main body, the convex portion is formed vertically in the body portion of the paper cup main body, and the number of the convex portions is plural. It is characterized by the following.
【０００９】本発明によれば、紙カップ本体にも断熱性
を有し、さらに断熱性を有する紙巻き部とが二重構造に
なっていることにより、断熱性が充分あり、取り扱い時
の保形性の点でも強度が充分にあり、外観上の印刷効果
もあり、そして比較的安いコストで製造が可能な断熱性
紙カップを得ることができる。According to the present invention, the paper cup body also has heat insulation, and furthermore, the paper winding portion having heat insulation has a double structure, so that the heat insulation is sufficient and the shape retention during handling is maintained. In this respect, a heat-insulating paper cup which has sufficient strength, has a printing effect on appearance, and can be manufactured at a relatively low cost can be obtained.
【００１０】[0010]
【発明の実施の形態】以下に、図面を参照しながら、本
発明について、さらに詳しく説明する。本発明による断
熱性紙カップ１は、図１に示すように、紙カップ本体２
と紙巻き部５とから構成され、紙カップ本体胴部３の外
周に紙巻き部５を巻き込むかあるいは勘合して形成して
いる。また、紙カップ本体２は、図２に示すように、紙
カップ本体胴部３と紙カップ本体底部４とから構成され
ている。さらに、紙カップ本体胴部３には、図３に示す
ように、凸部６を設けることもできる。この凸部６を設
けることにより、紙カップ本体胴部３と紙巻き部５とを
勘合した際に、紙カップ本体胴部３と紙巻き部５との間
に空気層の間隙７ができ、より断熱性の優れた断熱性紙
カップ２となる。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in more detail with reference to the drawings. As shown in FIG. 1, a heat-insulating paper cup 1 according to the present invention
The paper winding unit 5 is formed by winding or fitting the paper winding unit 5 around the outer periphery of the paper cup body 3. As shown in FIG. 2, the paper cup body 2 includes a paper cup body 3 and a paper cup body bottom 4. Further, as shown in FIG. 3, the paper cup body 3 may be provided with a projection 6. By providing the convex portion 6, when the paper cup main body 3 and the paper winding portion 5 are fitted together, a gap 7 of an air layer is formed between the paper cup main body 3 and the paper winding portion 5, thereby providing a more heat insulating property. An excellent heat insulating paper cup 2 is obtained.
【００１１】つぎに、詳しく材料構成について説明す
る。図４に示すように、紙カップ本体胴部３の材料構成
は、紙を主体とする基材層１１を基材として、表面側に
は熱可塑性樹脂層（表面）が発泡した発泡層１２によっ
て、被覆されている。裏面側には熱可塑性樹脂層（裏
面）１３を設ける。紙層１１と熱可塑性樹脂層（裏面）
１３との間には、バリア性などを上げるためにアルミニ
ウム箔層などを設けることもできる。Next, the material composition will be described in detail. As shown in FIG. 4, the material configuration of the paper cup body 3 includes a base layer 11 mainly composed of paper, and a foam layer 12 in which a thermoplastic resin layer (surface) is foamed on the front side. Coated. On the back side, a thermoplastic resin layer (back side) 13 is provided. Paper layer 11 and thermoplastic resin layer (back side)
13, an aluminum foil layer or the like can be provided to improve the barrier properties.
【００１２】紙を主体とする基材層１１は、本発明の断
熱性紙カップ１の主強度材料となっており、紙カップ成
形に適したカップ原紙を使用することが好ましい。坪量
は、１００〜４００ｇ／ｍ2 の範囲が、紙カップの製造
上好ましい。また、この紙の含水率が重要で、３〜１０
％の範囲が好ましく、さらに好ましくは、５〜８％の範
囲であることが望ましい。紙の中の水分を蒸発させ、そ
の蒸気圧の力で表面の熱可塑性樹脂層を発泡させて発泡
層１２を形成する際に、含水率が３％未満であると発泡
不足となって所望の厚さが得られなく、含水率が１０％
を越えると発泡表面が破裂した状態となることがあるの
で好ましくない。The base layer 11 mainly composed of paper is a main strength material of the heat-insulating paper cup 1 of the present invention, and it is preferable to use a cup base paper suitable for forming a paper cup. The basis weight is preferably in the range of 100 to 400 g / m 2 for the production of the paper cup. Further, the moisture content of this paper is important,
% Is preferable, and more preferably, it is in the range of 5 to 8%. When the moisture content in the paper is evaporated and the thermoplastic resin layer on the surface is foamed by the force of the vapor pressure to form the foamed layer 12, if the water content is less than 3%, the foaming becomes insufficient and the foaming layer 12 becomes insufficient. No thickness, 10% moisture content
If it exceeds, the foamed surface may be in a ruptured state, which is not preferable.
【００１３】熱可塑性樹脂（表面）が発泡した発泡層１
２に使用する熱可塑性樹脂には、低密度ポリエチレン樹
脂、線状低密度ポリエチレン樹脂、中密度ポリエチレン
樹脂、高密度ポリエチレン樹脂、ポリプロピレン樹脂、
アイオノマー、エチレン・酢酸ビニル共重合体、エチレ
ン・アクリル酸共重合体、エチレン・アクリル酸エステ
ル共重合体、エチレン・ビニルアルコール共重合体、ポ
リエステル樹脂、ポリ塩化ビニール樹脂、ポリスチレン
樹脂などを用いることができる。この発泡層１２は、基
材の紙層１１の表面に積層される。積層する方法として
は、樹脂を熱溶融して塗布する押し出しコーティング
法、あるいはフィルムになったものを貼り合わせるラミ
ネート法などを用いることができる。表面の熱可塑性樹
脂層が発泡した発泡層１２の発泡前の厚さは、１０〜１
００μｍの範囲が好ましい。１０μｍ未満、または１０
０μｍを越えると発泡しにくくなる。A foamed layer 1 in which a thermoplastic resin (surface) is foamed
The thermoplastic resin used in 2 includes low-density polyethylene resin, linear low-density polyethylene resin, medium-density polyethylene resin, high-density polyethylene resin, polypropylene resin,
Use of ionomer, ethylene / vinyl acetate copolymer, ethylene / acrylic acid copolymer, ethylene / acrylic acid ester copolymer, ethylene / vinyl alcohol copolymer, polyester resin, polyvinyl chloride resin, polystyrene resin, etc. it can. This foam layer 12 is laminated on the surface of the paper layer 11 of the base material. As a method of laminating, an extrusion coating method in which a resin is melted and applied, or a laminating method in which a film is pasted can be used. The thickness before foaming of the foamed layer 12 in which the thermoplastic resin layer on the surface is foamed is 10 to 1
A range of 00 μm is preferred. Less than 10 μm, or 10
If it exceeds 0 μm, foaming is difficult.
【００１４】この発泡層１２に凸部６を設けるには、基
材層１１の表面に部分的に印刷層１４を設ける。この印
刷層１４は、基材層１１の表面上に施され、凸部６を設
けようとする目的の位置に印刷する。つまり、印刷がさ
れた部分が、その上に設けられる熱可塑性樹脂層（表
面）が発泡した発泡層１２の発泡を促進させ、紙カップ
本体胴部３に凸部６を形成する。印刷の方法としては、
溶剤乾燥型のインキを使用するグラビア印刷が好まし
い。印刷する色については、特に限定されない。In order to provide the convex portion 6 on the foam layer 12, a print layer 14 is partially provided on the surface of the base material layer 11. This printing layer 14 is applied on the surface of the base material layer 11 and is printed at a target position where the projection 6 is to be provided. That is, the printed portion promotes the foaming of the foamed layer 12 in which the thermoplastic resin layer (surface) provided thereon is foamed, and the convex portion 6 is formed on the paper cup body 3. As a printing method,
Gravure printing using a solvent drying type ink is preferred. The color to be printed is not particularly limited.
【００１５】熱可塑性樹脂層（裏面）１３に使用する熱
可塑性樹脂には、発泡層１２と同様に、低密度ポリエチ
レン樹脂、線状低密度ポリエチレン樹脂、中密度ポリエ
チレン樹脂、高密度ポリエチレン樹脂、ポリプロピレン
樹脂、アイオノマー、エチレン・酢酸ビニル共重合体、
エチレン・アクリル酸共重合体、エチレン・アクリル酸
エステル共重合体、エチレン・ビニルアルコール共重合
体、ポリエステル樹脂、ポリ塩化ビニール樹脂、ポリス
チレン樹脂などを用いることができる。この熱可塑性樹
脂層（裏面）１３は、基材層１１の裏面に積層される。
積層する方法としては、発泡層１２と同様に、樹脂を熱
溶融して塗布する押し出しコーティング法、あるいはフ
ィルムになったものを貼り合わせるラミネート法などを
用いることができる。裏面の熱可塑性樹脂層（裏面）１
３の厚さは、特に限定されない。ただ、裏面を発泡させ
ずに、表面だけを発泡させるために、裏面からの水蒸気
の蒸発を防ぐ方法として、基材層１１と熱可塑性樹脂層
（裏面）１３の間にアルミニウム箔などの層を設ける
か、あるいは裏面の熱可塑性樹脂は表面の熱可塑性樹脂
より軟化点の高い熱可塑性樹脂を使う。例えば、ポリエ
チレン樹脂の場合、軟化点の高い高密度ポリエチレン樹
脂を裏面の熱可塑性樹脂として用いる。The thermoplastic resin used for the thermoplastic resin layer (back surface) 13 includes, similarly to the foamed layer 12, low-density polyethylene resin, linear low-density polyethylene resin, medium-density polyethylene resin, high-density polyethylene resin, polypropylene. Resin, ionomer, ethylene / vinyl acetate copolymer,
Ethylene / acrylic acid copolymer, ethylene / acrylic acid ester copolymer, ethylene / vinyl alcohol copolymer, polyester resin, polyvinyl chloride resin, polystyrene resin and the like can be used. This thermoplastic resin layer (back surface) 13 is laminated on the back surface of the base material layer 11.
As a method of laminating, as in the case of the foamed layer 12, an extrusion coating method in which a resin is hot-melted and applied, or a laminating method in which a film is adhered can be used. Thermoplastic resin layer on back side (back side) 1
The thickness of 3 is not particularly limited. However, in order to foam only the front surface without foaming the back surface, as a method of preventing evaporation of water vapor from the back surface, a layer such as an aluminum foil is interposed between the base material layer 11 and the thermoplastic resin layer (back surface) 13. A thermoplastic resin having a softening point higher than that of the thermoplastic resin on the front surface is used. For example, in the case of a polyethylene resin, a high-density polyethylene resin having a high softening point is used as the thermoplastic resin on the back surface.
【００１６】つづいて、紙巻き部５は、紙カップ本体胴
部３の外側周辺に巻き付けられるかあるいは勘合され
る。紙巻き部５の材料構成は、図５に示すように、紙を
基材とした基材層２１を基材として、裏面側は熱可塑性
樹脂層（裏面）が発泡した発泡層２３によって、被覆さ
れている。表面側には熱可塑性樹脂層（表面）２２を設
ける。基材層２１と熱可塑性樹脂層（表面）２２との間
には、バリア性などを上げるためにアルミニウム箔層な
どを設けることもできる。また、基材層２１あるいは熱
可塑性樹脂層（表面）２２の表面には、美麗な印刷を行
なうことができる。Subsequently, the paper winding section 5 is wound or fitted around the outer periphery of the paper cup body 3. As shown in FIG. 5, the material configuration of the paper winding part 5 is such that a base layer 21 made of paper is used as a base material, and a back surface side is covered with a foam layer 23 in which a thermoplastic resin layer (back surface) is foamed. ing. A thermoplastic resin layer (surface) 22 is provided on the front side. An aluminum foil layer or the like may be provided between the base material layer 21 and the thermoplastic resin layer (surface) 22 in order to improve barrier properties and the like. In addition, beautiful printing can be performed on the surface of the base material layer 21 or the thermoplastic resin layer (surface) 22.
【００１７】基材層２１は、印刷適性と円筒状にするた
めの適性のある板紙が好ましいが、敢えて成形に適した
カップ原紙を使用する必要はない。坪量は、１００〜４
００ｇ／ｍ2 の範囲が、好ましい。また、この紙の含水
率が重要で、紙カップ本体胴部３の基材の紙層１１と同
様に、３〜１０％の範囲が好ましく、さらに好ましく
は、５〜８％の範囲であることが望ましい。紙の中の水
分を蒸発させ、その蒸気圧の力で裏面の熱可塑性樹脂層
を発泡させて発泡層２３を形成する際に、含水率が３％
未満であると発泡不足となって所望の厚さが得られな
く、含水率が１０％を越えると発泡表面が破裂した状態
となることがあるので好ましくない。The base material layer 21 is preferably made of a paperboard which is suitable for printing and suitable for forming into a cylindrical shape, but it is not necessary to use a cup base paper which is suitable for molding. Basis weight is 100-4
A range of 00 g / m 2 is preferred. Further, the moisture content of the paper is important, and is preferably in the range of 3 to 10%, more preferably 5 to 8%, similarly to the paper layer 11 of the base material of the paper cup body 3. desirable. When the moisture in the paper is evaporated and the thermoplastic resin layer on the back side is foamed by the force of the vapor pressure to form the foamed layer 23, the water content is 3%.
When the water content is less than 10%, the foamed surface may be in a ruptured state, which is not preferable.
【００１８】熱可塑性樹脂層（裏面）が発泡した発泡層
２３に使用する熱可塑性樹脂には、紙カップ本体胴部３
の発泡層１２と同様の樹脂を用いることができる。この
発泡層２３は、基材層２１の裏面に積層される。積層す
る方法としては、紙カップ本体胴部３の発泡層１２と同
様の方法で行うことができる。裏面の熱可塑性樹脂層が
発泡した発泡層２３の発泡前の厚さは、１０〜１００μ
ｍの範囲が好ましい。１０μｍ未満、または１００μｍ
を越えると発泡しにくくなる。The thermoplastic resin used for the foamed layer 23 in which the thermoplastic resin layer (back side) is foamed includes a paper cup body 3
The same resin as the foamed layer 12 can be used. This foam layer 23 is laminated on the back surface of the base material layer 21. The lamination can be performed in the same manner as the foamed layer 12 of the paper cup body 3. The thickness before foaming of the foamed layer 23 formed by foaming the thermoplastic resin layer on the back surface is 10 to 100 μm.
The range of m is preferred. Less than 10 μm or 100 μm
If it exceeds, foaming becomes difficult.
【００１９】熱可塑性樹脂層（表面）２２に使用する熱
可塑性樹脂には、裏面の発泡層２３と同様の樹脂を用い
ることができる。この熱可塑性樹脂層（表面）２２は、
基材層２１の表面に積層される。積層する方法として
は、発泡層２３と同様の方法で行うことができる。表面
の熱可塑性樹脂層（表面）２２の厚さは、特に限定され
ない。ただ、表面を発泡させずに、裏面だけを発泡させ
るために、表面への水蒸気の蒸発を防ぐ方法として、紙
層２１と熱可塑性樹脂層（表面）２２の間にアルミニウ
ム箔などの層を設けるか、あるいは表面の熱可塑性樹脂
は裏面の熱可塑性樹脂より軟化点の高い熱可塑性樹脂を
使う。例えば、ポリエチレン樹脂の場合、軟化点の高い
高密度ポリエチレン樹脂を裏面の熱可塑性樹脂として用
いる。As the thermoplastic resin used for the thermoplastic resin layer (front surface) 22, the same resin as the foamed layer 23 on the back surface can be used. This thermoplastic resin layer (surface) 22
It is laminated on the surface of the base material layer 21. As a method for laminating, the same method as that for the foamed layer 23 can be used. The thickness of the thermoplastic resin layer (surface) 22 on the surface is not particularly limited. However, in order to foam only the back surface without foaming the front surface, a layer such as an aluminum foil is provided between the paper layer 21 and the thermoplastic resin layer (front surface) 22 as a method for preventing evaporation of water vapor to the front surface. Alternatively, as the thermoplastic resin on the front surface, a thermoplastic resin having a higher softening point than the thermoplastic resin on the rear surface is used. For example, in the case of a polyethylene resin, a high-density polyethylene resin having a high softening point is used as the thermoplastic resin on the back surface.
【００２０】本発明の断熱性紙カップの製造方法は、ま
ず、基材層１１の表と裏の両面に熱可塑性樹脂層が積層
された積層体を、打ち抜きで紙カップ本体胴部３の扇形
のブランク板に加工し、つぎに、紙カップ成形機によっ
て底部と合わせて、紙カップ本体に成形する。底部に
も、発泡する熱可塑性樹脂層をもった積層体を使うこと
ができる。この紙カップ本体は、一般的な紙カップ成型
機で製造ができる。この成型された紙カップ本体を加熱
することにより、紙の中の水分が蒸発し、その蒸気圧と
空気の熱膨張とが加わって作用し、表面の熱可塑性樹脂
の層に発泡構造を生成させる。また、表面に凸部６を設
ける場合には、あらかじめ基材層１１の表面に印刷を施
しておく、加熱加工で、印刷がされている部分がより発
泡が促進され、凸部６を形成する。The method for manufacturing a heat-insulating paper cup according to the present invention is as follows. First, a laminate in which a thermoplastic resin layer is laminated on both front and back surfaces of a base material layer 11 is punched into a fan-shaped blank of a paper cup body 3. It is processed into a plate, and then formed into a paper cup body together with the bottom by a paper cup forming machine. A laminate having a foaming thermoplastic resin layer also at the bottom can be used. This paper cup body can be manufactured by a general paper cup molding machine. By heating the molded paper cup body, the moisture in the paper evaporates, and the vapor pressure and the thermal expansion of the air are added to act to generate a foamed structure in the thermoplastic resin layer on the surface. In the case where the convex portion 6 is provided on the surface, the surface of the base material layer 11 is printed in advance, and the heated portion further promotes foaming by heat processing, thereby forming the convex portion 6. .
【００２１】加熱方法としては、熱風、赤外線、遠赤外
線、マイクロ波、高周波などを使うことができる。静置
して加熱する方法、あるいはコンベアーにより送りなが
ら加熱する方法がある。加熱条件としては、温度が１０
０〜２００°Ｃの範囲が好ましく、時間としては、１０
秒間〜５分間の範囲が好ましい。As a heating method, hot air, infrared rays, far infrared rays, microwaves, high frequencies, etc. can be used. There is a method of heating while standing, or a method of heating while feeding by a conveyor. As the heating condition, the temperature is 10
The temperature is preferably in the range of 0 to 200 ° C.
A range from seconds to 5 minutes is preferred.
【００２２】紙カップ本体２を加熱し、発泡を行なった
後、紙カップ本体胴部３の外側周辺に紙巻き部５を設け
る。巻き付ける一つの方法には、図６に示すように、テ
ーパーのついた筒状の紙巻き部５を予め別の工程で作成
しておき、この筒状の紙巻き部５に紙カップ本体２を挿
入し、嵌合する。紙カップ本体胴部３の表面と紙巻き部
５の裏面とが発泡層であることから、嵌合した後は、抜
けにくい状態となっている。部分的に接着剤で接着して
もよい。もう一つの方法には、図７に示すように、紙カ
ップ本体２に紙巻き部５のブランクを、部分的に、接着
剤で接着しながら巻き込んで、ブランクの両端を接着し
固定する方法がある。どちらの方法にしろ、発泡した面
同志が接触しているために、紙カップ本体２と紙巻き部
５とは、抜けにくい状態で一体化される。After the paper cup body 2 is heated and foamed, a paper winding section 5 is provided around the outside of the paper cup body 3. As shown in FIG. 6, one method of winding is to form a tapered cylindrical paper winding portion 5 in a separate step in advance, insert the paper cup body 2 into the cylindrical paper winding portion 5, Fit. Since the front surface of the paper cup body 3 and the back surface of the paper winding portion 5 are foamed layers, they are in a state where they hardly come off after fitting. It may be partially adhered with an adhesive. As another method, as shown in FIG. 7, there is a method in which a blank of the paper winding unit 5 is partially wound around the paper cup body 2 while being bonded with an adhesive, and both ends of the blank are bonded and fixed. In either case, since the foamed surfaces are in contact with each other, the paper cup body 2 and the paper winding portion 5 are integrated in a state in which the paper cup body 2 is hard to come off.
【００２３】[0023]
【実施例】次に、本発明について実施例をあげて、さら
に具体的に説明する。 〔実施例１〕まず、基材層として坪量２８０ｇ／ｍ2 、
含水率８．０％のカップ原紙を用い、表面に、熱可塑性
樹脂層（表面）として４０μの厚さの低密度ポリエチレ
ン樹脂層を、裏面には、熱可塑性樹脂層（裏面）として
１５μの低密度ポリエチレンと高密度ポリエチレンを混
合したポリエチレン樹脂層を押し出しコーティング法に
よって設けた積層体を作成した。つぎに、この積層体を
打ち抜き加工で胴部用のブランクにし、紙カップ成型機
によって紙カップ本体を作成した。この紙カップ本体に
ついては、内容量が４００ＣＣ（満注時）、胴部上端内
径が８８ｍｍ、底部内径が６５ｍｍ、そして高さが９０
ｍｍとした。さらに、この紙カップ本体を、１２０°Ｃ
の乾燥機の中で３分間加熱し、表面に発泡層を有する紙
カップ本体を作成した。一方、紙巻き部については、ま
ず、基材層として坪量２８０ｇ／ｍ2 、含水率８．０％
のカップ原紙を用い、裏面に、熱可塑性樹脂層（表面）
として４０μの厚さの低密度ポリエチレン樹脂層を、表
面には、熱可塑性樹脂層（裏面）として１５μの低密度
ポリエチレンと高密度ポリエチレンを混合したポリエチ
レン樹脂層を押し出しコーティング法によって設けた積
層体を作成した。つぎに、この積層体の表面に絵柄、表
示などの印刷を行い、そして打ち抜き加工で紙巻き部用
の扇形のブランクにし、両側を貼り合わせてテーパー状
の筒状の紙巻き部を作成した。この紙巻き部について
は、上端部内径が８９ｍｍ、底部内径が６６．５ｍｍ、
そして高さが８８．５ｍｍとした。さらに、この紙巻き
部を、１２０°Ｃの乾燥機の中で３分間加熱し、裏面に
発泡層を有する紙巻き部を作成した。上記の紙カップ本
体を紙巻き部の中に嵌合して一体化して断熱性紙カップ
を作成した。Next, the present invention will be described more specifically with reference to examples. Example 1 First, a basis weight of 280 g / m 2 was used as a base material layer.
Using a cup base paper having a water content of 8.0%, a low-density polyethylene resin layer having a thickness of 40 μm is formed as a thermoplastic resin layer (front surface) on the front surface, and a low-density polyethylene resin layer having a thickness of 15 μm is formed as a thermoplastic resin layer (rear surface) on the back surface. A laminate was prepared by extruding a polyethylene resin layer in which high-density polyethylene was mixed with high-density polyethylene by an extrusion coating method. Next, the laminated body was blanked into a body blank by punching, and a paper cup body was prepared using a paper cup molding machine. The paper cup body has an inner capacity of 400 CC (when fully filled), an inner diameter of the upper end of the body of 88 mm, an inner diameter of the bottom of 65 mm, and a height of 90 mm.
mm. Further, the paper cup body is kept at 120 ° C.
Was heated in a dryer for 3 minutes to prepare a paper cup body having a foam layer on the surface. On the other hand, as for the paper roll, first, the basis weight was 280 g / m 2 and the water content was 8.0% as the base material layer.
Thermoplastic resin layer (front surface) on the back using cup base paper
A laminate having a low-density polyethylene resin layer having a thickness of 40 μm and a polyethylene resin layer obtained by mixing 15 μm of low-density polyethylene and high-density polyethylene as a thermoplastic resin layer (rear surface) on the front surface is formed by extrusion coating. Created. Next, a pattern, a display, and the like were printed on the surface of the laminated body, and a fan-shaped blank for a paper roll was formed by punching, and a tapered tubular paper roll was formed by bonding both sides together. Regarding this paper winding part, the inner diameter at the upper end is 89 mm, the inner diameter at the bottom is 66.5 mm,
And the height was set to 88.5 mm. Further, the paper roll was heated in a dryer at 120 ° C. for 3 minutes to prepare a paper roll having a foam layer on the back surface. The above-mentioned paper cup body was fitted into a paper winding portion and integrated to form a heat-insulating paper cup.
【００２４】[0024]
【発明の効果】本発明によれば、紙カップ本体にも断熱
性を有し、また、断熱性のある紙巻き部を設け、紙カッ
プの胴部が二重になっていることから、断熱性の効果が
より高く、強度が上がり、取り扱い時の保形性が充分に
あり、紙巻き部の表面は印刷適性が良く外観上の印刷効
果もあり、そして比較的安いコストで製造が可能な断熱
性紙カップを得ることができる。According to the present invention, the paper cup main body also has heat insulation properties, and a paper winding portion having heat insulation properties is provided, and since the body of the paper cup is doubled, the heat insulation effect is obtained. Higher strength, higher strength, sufficient shape retention during handling, the surface of the paper roll has good printability and a printing effect on the appearance, and a heat insulating paper cup that can be manufactured at relatively low cost Obtainable.
【図１】本発明による断熱性紙カップの一実施例を示す
一部を破断した正面図である。FIG. 1 is a partially cutaway front view showing an embodiment of a heat insulating paper cup according to the present invention.
【図２】本発明による断熱性紙カップの一実施例を示す
部分断面図である。FIG. 2 is a partial cross-sectional view showing one embodiment of a heat insulating paper cup according to the present invention.
【図３】本発明による断熱性紙カップの別の実施例を示
す部分断面図である。FIG. 3 is a partial sectional view showing another embodiment of the heat insulating paper cup according to the present invention.
【図４】本発明による断熱性紙カップの別の実施例の紙
カップ本体の部分拡大断面図である。FIG. 4 is a partially enlarged sectional view of a paper cup body of another embodiment of the heat insulating paper cup according to the present invention.
【図５】本発明による断熱性紙カップの一実施例の紙巻
き部の部分拡大断面図である。FIG. 5 is a partially enlarged cross-sectional view of a paper winding portion of one embodiment of the heat-insulating paper cup according to the present invention.
【図６】本発明による断熱性紙カップの一実施例におい
て紙カップ本体に紙巻き部を巻き付ける一つの方法を示
す図である。FIG. 6 is a view showing one method of winding a paper winding part around a paper cup body in one embodiment of the heat insulating paper cup according to the present invention.
【図７】本発明による断熱性紙カップの一実施例におい
て紙カップ本体に紙巻き部を巻き付ける他の方法を示す
図である。FIG. 7 is a view showing another method of winding a paper winding unit around a paper cup body in one embodiment of the heat insulating paper cup according to the present invention.
１ 断熱性紙カップ ２ 紙カップ本体 ３ 紙カップ本体胴部 ４ 紙カップ本体底部 ５ 紙巻き部 ６ 凸部 ７ 間隙 ８ トップカール部 １１ 基材層 １２ 熱可塑性樹脂層（表面）が発泡した発泡層 １３ 熱可塑性樹脂層（裏面） １４ 印刷層 ２１ 基材層 ２２ 熱可塑性樹脂層（表面） ２３ 熱可塑性樹脂層（裏面）が発泡した発泡層 DESCRIPTION OF SYMBOLS 1 Insulated paper cup 2 Paper cup main body 3 Paper cup main body trunk part 4 Paper cup main body bottom part 5 Paper winding part 6 Convex part 7 Gap 8 Top curl part 11 Base material layer 12 Foaming layer in which thermoplastic resin layer (surface) foamed 13 Thermoplastic resin layer (Back side) 14 Print layer 21 Base layer 22 Thermoplastic resin layer (front side) 23 Foamed layer formed by foaming thermoplastic resin layer (back side)
Claims (6)
該紙カップ本体の胴部の外周に嵌合した紙巻き部とから
構成された紙カップであって、前記紙カップ本体は、少
なくとも外面側から順次、熱可塑性樹脂層（表面）が発
泡した発泡層、紙を主体とする基材層および熱可塑性樹
脂層（裏面）とを備え、また、前記紙巻き部は、少なく
とも外面側から順次、熱可塑性樹脂層（表面）、紙を主
体とする基材層および熱可塑性樹脂層（裏面）が発泡し
た発泡層とを備えたことを特徴とする断熱性紙カップ。1. A paper cup body comprising a body and a bottom,
A paper cup comprising a paper roll fitted to the outer periphery of a body of the paper cup main body, wherein the paper cup main body includes a foamed layer in which a thermoplastic resin layer (surface) is foamed at least sequentially from the outer side, and paper. The paper winding part includes a thermoplastic resin layer (front surface), a paper-based substrate layer, and a thermoplastic resin layer at least sequentially from the outer surface side. A heat-insulating paper cup comprising a foamed layer in which a resin layer (back surface) is foamed.
一部分を他の部分より突出した凸部に形成し、前記紙カ
ップ本体と前記紙巻き部とを嵌合した際に、前記紙カッ
プ本体の胴部と前記紙巻き部との間に間隙を形成したこ
とを特徴とする請求項１に記載する断熱性紙カップ。2. The foamed layer of the paper cup body has a part formed as a protrusion projecting from another part, and when the paper cup body and the paper winding part are fitted together, a body part of the paper cup body is formed. The heat insulating paper cup according to claim 1, wherein a gap is formed between the paper cup and the paper winding part.
発泡層と前記基材層との間に部分的に印刷層を設け、該
印刷層に重なる前記発泡層の部分に、前記凸部を形成し
たことを特徴とする請求項２に記載する断熱性紙カッ
プ。3. A printing layer is partially provided between the foam layer and the base layer on the body of the paper cup body, and the projection is formed on a portion of the foam layer overlapping the printing layer. The heat-insulating paper cup according to claim 2, wherein:
外周方向に連続状に形成されたことを特徴とする請求項
３に記載する断熱性紙カップ。4. The heat-insulating paper cup according to claim 3, wherein the convex portion is formed continuously in an outer peripheral direction of a body portion of the paper cup main body.
上下方向に形成されたことを特徴とする請求項３に記載
する断熱性紙カップ。5. The heat-insulating paper cup according to claim 3, wherein the projection is formed in a vertical direction of a body of the paper cup body.
とする請求項４又は５に記載する断熱性紙カップ。6. The heat-insulating paper cup according to claim 4, wherein the number of the convex portions is plural.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP09059798A JP4090563B2 (en) | 1998-03-20 | 1998-03-20 | Heat insulating paper cup |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP09059798A JP4090563B2 (en) | 1998-03-20 | 1998-03-20 | Heat insulating paper cup |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH11268781A true JPH11268781A (en) | 1999-10-05 |
| JP4090563B2 JP4090563B2 (en) | 2008-05-28 |
Family
ID=14002889
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP09059798A Expired - Fee Related JP4090563B2 (en) | 1998-03-20 | 1998-03-20 | Heat insulating paper cup |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP4090563B2 (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002044782A (en) * | 2000-07-28 | 2002-02-08 | Foster Electric Co Ltd | Diaphragm for electric-acoustic transducer |
| JP2003341752A (en) * | 2002-05-20 | 2003-12-03 | Dainippon Printing Co Ltd | Composite container |
| JP2004196396A (en) * | 2002-03-05 | 2004-07-15 | Takuko Kaku | Thermal insulation paper cup |
| JP2008087765A (en) * | 2006-09-29 | 2008-04-17 | Nippon Paper Industries Co Ltd | Heat insulating paper-made container, and raw material sheet used for the same |
| JP2012086497A (en) * | 2010-10-21 | 2012-05-10 | Tosoh Corp | Foamed laminate for microwave oven cooking |
| JP2016165810A (en) * | 2015-03-09 | 2016-09-15 | 東ソー株式会社 | Method for producing foam laminate, and the foam laminate |
-
1998
- 1998-03-20 JP JP09059798A patent/JP4090563B2/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002044782A (en) * | 2000-07-28 | 2002-02-08 | Foster Electric Co Ltd | Diaphragm for electric-acoustic transducer |
| JP2004196396A (en) * | 2002-03-05 | 2004-07-15 | Takuko Kaku | Thermal insulation paper cup |
| JP2003341752A (en) * | 2002-05-20 | 2003-12-03 | Dainippon Printing Co Ltd | Composite container |
| JP2008087765A (en) * | 2006-09-29 | 2008-04-17 | Nippon Paper Industries Co Ltd | Heat insulating paper-made container, and raw material sheet used for the same |
| JP2012086497A (en) * | 2010-10-21 | 2012-05-10 | Tosoh Corp | Foamed laminate for microwave oven cooking |
| JP2016165810A (en) * | 2015-03-09 | 2016-09-15 | 東ソー株式会社 | Method for producing foam laminate, and the foam laminate |
Also Published As
| Publication number | Publication date |
|---|---|
| JP4090563B2 (en) | 2008-05-28 |
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