JP2002193348A - Heat-insulating paper cup usable in microwave oven - Google Patents

Heat-insulating paper cup usable in microwave oven

Info

Publication number
JP2002193348A
JP2002193348A JP2000387762A JP2000387762A JP2002193348A JP 2002193348 A JP2002193348 A JP 2002193348A JP 2000387762 A JP2000387762 A JP 2000387762A JP 2000387762 A JP2000387762 A JP 2000387762A JP 2002193348 A JP2002193348 A JP 2002193348A
Authority
JP
Japan
Prior art keywords
paper cup
microwave oven
layer
heat
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
Application number
JP2000387762A
Other languages
Japanese (ja)
Other versions
JP4770018B2 (en
Inventor
Takeshi Morisako
健 森迫
Tatsuya Nozaki
達也 野崎
Kenichi Endo
憲一 遠藤
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Dai Nippon Printing Co Ltd
Original Assignee
Dai Nippon Printing Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority to JP2000387762A priority Critical patent/JP4770018B2/en
Application filed by Dai Nippon Printing Co Ltd filed Critical Dai Nippon Printing Co Ltd
Priority to CN2007100961935A priority patent/CN101531260B/en
Priority to CNB018206123A priority patent/CN1320870C/en
Priority to TW90131044A priority patent/TWI224500B/en
Priority to CN2007100961954A priority patent/CN101117163B/en
Priority to PCT/JP2001/010988 priority patent/WO2002047523A1/en
Priority to KR1020037007591A priority patent/KR100816458B1/en
Publication of JP2002193348A publication Critical patent/JP2002193348A/en
Priority to HK08106209.6A priority patent/HK1111664A1/en
Priority to HK10100768.8A priority patent/HK1134475A1/en
Application granted granted Critical
Publication of JP4770018B2 publication Critical patent/JP4770018B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Abstract

PROBLEM TO BE SOLVED: To provide a heat-insulating paper cup usable in a microwave oven wherein the heat-insulating paper cup which sufficiently has heat insulating effects and includes a foamed layer prevents its rim of the bottom from being burnt after contents such as a beverage or instant food is put in the cup and cooked with heat in the microwave oven. SOLUTION: The heat-insulating paper cup usable in a microwave oven comprises a barrel member including a cylindrical barrel, a top curl comprising an upper end of the barrel folded, and a bottom member including a bottom and a bend comprising an outer periphery of the bottom folded, wherein the bend is interposed between the barrel and the fold and they are joined with one another and the bottom of the paper cup is dented. The paper cup includes at least, from an external surface side, a foamed layer of a thermoplastic resin, a base layer mainly comprising paper and a thermoplastic resin layer. In addition, either the barrel member or the bottom member includes a foamed layer. Alternatively, the barrel member and the bottom member have the foamed layer.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【発明の属する技術分野】本発明は、断熱電子レンジ対
応紙カップに関するものであり、さらに詳しくは、熱可
塑性合成樹脂の発泡層を有する断熱電子レンジ対応紙カ
ップに関するものである。そして、本発明の断熱電子レ
ンジ対応紙カップは、断熱容器として電子レンジで使用
できる。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a paper cup for an insulated microwave oven, and more particularly to a paper cup for an insulated microwave oven having a foamed layer of a thermoplastic synthetic resin. And the paper cup for an insulated microwave oven of the present invention can be used in a microwave oven as an insulated container.

【0002】[0002]

【従来の技術】従来より、自動販売機などで熱い飲料
用、即席食品用などに紙カップが広く使用されている。
また、一般的ではないものの、飲料や惣菜などの入った
紙カップを直接電子レンジを利用し、加熱調理すること
も行なわれている。一般的な紙カップPは、図10に示
すように、胴部材1と底部材2とからなり、胴部材1は
主に胴部11を形成し、上端を外側にカールしてトップ
カール部12とし、下端を内側に折り返して折り返し部
13としている。一方、底部材2は主に底面部21を形
成し、外周縁部を下方へ略直角に屈曲して屈曲部22と
している。胴部材1と底部材2の接合は、底部材2の屈
曲部22を、胴部材1の折り返し部13と、胴部11の
下端部とで挟んで加熱圧着している。この底部材2の屈
曲部22を挟み込んで接合した部分を糸じり部Zと称
し、底面部21を上げ底にしている。
2. Description of the Related Art Conventionally, paper cups have been widely used for hot beverages and instant foods in vending machines and the like.
Although not common, paper cups containing beverages, prepared foods, and the like are also heated and cooked directly using a microwave oven. As shown in FIG. 10, a general paper cup P includes a body member 1 and a bottom member 2. The body member 1 mainly forms a body portion 11, and the upper end is curled outward to form a top curl portion 12. The lower end is folded inward to form a folded portion 13. On the other hand, the bottom member 2 mainly forms a bottom surface portion 21, and the outer peripheral edge portion is bent downward at a substantially right angle to form a bent portion 22. In joining the body member 1 and the bottom member 2, the bent portion 22 of the bottom member 2 is heat-pressed while being sandwiched between the folded portion 13 of the body member 1 and the lower end of the body portion 11. A portion where the bent portion 22 of the bottom member 2 is sandwiched and joined is referred to as a thread binding portion Z, and the bottom portion 21 is raised.

【0003】また、断熱性の有するカップとしては、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、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。
[0003] As a heat insulating cup, a foamed synthetic resin, particularly a foamed polystyrene resin as a raw material, is widely used. In addition, a paper cup with a wavy shape around the entire circumference of a paper cup, or a double structure with an inner and outer structure with a space between the two layers, and polyethylene on both sides of the paper There is a foamed polyethylene resin layer on the surface of a paper cup using a material laminated with a resin layer.

【0004】[0004]

【発明が解決しようとする課題】しかしながら、一般形
状の紙カップPに内容物を入れて電子レンジで加熱調理
した場合、紙カップの底の糸じり部Zに焦げを生じる場
合があるという問題がある。その原因は、つぎのように
考えられる。紙の材料のパルプのセルロースは基本的に
は電子レンジのマイクロ波を吸収する。従って、紙の重
なる糸じり部Zでは、紙厚が増し発熱量が増す。一方、
表面積は変わらないため熱の放出量が同じで、発生した
熱を蓄積することになり、温度が上昇し、焦げを発生さ
せる原因となっている。ただし、内容物がある場合に
は、焦げが発生しにくくなる。それは、紙に発生し蓄積
された熱が内容物に奪われるためと考えられる。つま
り、通常の紙カップでは、図10に示すように、胴部材
1と底部材2の接合部位として糸じり部Zを持つ構造で
あるため、この糸じり部Zは、表側と裏側の両面からマ
イクロ波の照射を受けること、内容物に触れることなな
く、畜熱されやすく、そのために焦げが生じやすい。
However, when the contents are put into a paper cup P of a general shape and cooked by a microwave oven, there is a problem that the threading portion Z at the bottom of the paper cup may be scorched. . The cause is considered as follows. The cellulose of the pulp of the paper material basically absorbs microwaves in the microwave. Therefore, at the thread binding portion Z where the papers overlap, the paper thickness increases and the calorific value increases. on the other hand,
Since the surface area does not change, the amount of heat release is the same, the generated heat is accumulated, and the temperature rises, causing burns. However, when there is a content, scorching is less likely to occur. It is considered that the heat generated and accumulated in the paper is taken away by the contents. That is, as shown in FIG. 10, a normal paper cup has a structure having a threaded portion Z as a joint portion between the body member 1 and the bottom member 2, so that the threaded portion Z is formed on both the front side and the back side. Without being exposed to microwaves and without touching the contents, it is easy to be heated and, therefore, easily burns.

【0005】また、前述の断熱性を有するカップにおい
て、発泡ポリスチレン樹脂によるカップは、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、使用後に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。
[0005] Among the above-mentioned cups having heat insulating properties, a cup made of expanded polystyrene resin is manufactured by molding a resin to which a foaming agent is added, and is excellent in heat insulating properties, but is treated as waste after use. And there is a problem in terms of environmental measures. There are also disadvantages such as low surface smoothness and poor printability.

【0006】また、全周に波形状などの紙製の胴巻きを
した形態の紙カップ、あるいは、内側カップと外側カッ
プの二重構造をもつ紙カップは、断熱性、および環境対
応の点では優れているが、材料、および製造上のコスト
が高いという問題がある。
[0006] A paper cup in the form of a paper bobbin, such as a wavy shape, or a paper cup having a double structure of an inner cup and an outer cup is excellent in terms of heat insulation and environmental friendliness. However, there is a problem that the material and the manufacturing cost are high.

【0007】つまり、今まで、断熱性を有し、製造コス
トが低く、かつ、電子レンジで使用して糸じり部に焦げ
を生じない紙カップはなかった。
That is, until now, there has been no paper cup which has heat insulating properties, has a low manufacturing cost, and is not used in a microwave oven and does not cause scorching at the threaded portion.

【0008】本発明は、断熱効果が充分ある発泡層を有
する断熱紙カップであって、カップの中に、飲料や即席
食品などの内容物を入れ、電子レンジで加熱調理した時
に、糸じり部に焦げを発生させることのない断熱電子レ
ンジ対応紙カップを提供することを目的とするものであ
る。
[0008] The present invention relates to an insulated paper cup having a foam layer having a sufficient heat insulating effect, wherein when a content such as a beverage or an instant food is placed in the cup and cooked in a microwave oven, a twisting portion is formed. It is an object of the present invention to provide a heat-insulated microwave oven-compatible paper cup that does not cause burning.

【0009】[0009]

【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、筒状の胴部と、該胴部
の上端側を折り曲げたトップカール部と、該胴部の下端
を内側に折り返した折り返し部とを有する胴部材と、底
面部と、該底面部の外周縁部を折り曲げた屈曲部とを有
する底部材とを備えて前記胴部と前記折り返し部との間
に前記屈曲部が挟み込まれて互いに接合された紙カップ
の前記底面部を凹状とした電子レンジ対応紙カップであ
って、前記紙カップは、少なくとも外面側から熱可塑性
樹脂の発泡層と、紙を主体とする基材層と、熱可塑性樹
脂層とを備えていることを特徴とする断熱電子レンジ対
応紙カップである。また、前記胴部材が前記発泡層を有
すること、あるいは、前記底部材が前記発泡層を有する
ことを特徴とする。さらに、前記胴部材および前記底部
材が前記発泡層を有することを特徴とする。
As a result of studying to solve the above-mentioned problems, the present invention provides a cylindrical body, a top curl part having an upper end side bent, and a body part. A torso member having a folded portion having a lower end folded inward, a bottom member having a bottom portion and a bent portion having a bent outer peripheral edge of the bottom portion, and A microwave-compatible paper cup in which the bottom portions of the paper cups are sandwiched between the bent portions sandwiched therebetween and have a concave bottom surface, wherein the paper cup mainly includes a foamed layer of a thermoplastic resin from at least the outer surface side, and paper. A heat-insulating microwave oven-compatible paper cup, comprising: a base material layer; and a thermoplastic resin layer. Further, the body member has the foam layer, or the bottom member has the foam layer. Further, the body member and the bottom member have the foam layer.

【0010】本発明によれば、断熱効果が充分あり、滑
り止め効果があり、そしてデザイン的に独特な風合いを
もつ発泡層を有する断熱紙カップであって、紙カップの
底面部の形状が下方に凹状に変形したことによって、紙
カップの中に、飲料や即席食品などの内容物を入れ、電
子レンジで加熱調理した時に、糸じり部に焦げを発生さ
せることのない断熱電子レンジ対応紙カップを得ること
ができる。
According to the present invention, there is provided an insulated paper cup having a sufficient heat insulating effect, a non-slip effect, and a foam layer having a unique texture in design, wherein the shape of the bottom of the paper cup is concave downward. To obtain a heat-insulated microwave-compatible paper cup that does not cause the threaded portion to burn when the contents such as beverages and ready-to-eat food are placed in a paper cup and cooked in a microwave oven Can be.

【0011】[0011]

【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。図1は、本発明
による断熱電子レンジ対応紙カップの一実施例の発泡が
なされる前の状態の部分断面図である。電子レンジ対応
紙カップaは、図1−aに示すように、胴部材1と底部
材2とから構成されている。胴部材1は、胴部11と、
上端を外側にカールしてトップカール部12と、下端を
内側に折り返して折り返し部13とからなっている。一
方、底部材2は、内面側から下方に凹状の底面部21U
と、外周縁部を下方へ略直角に屈曲して屈曲部22とか
らなっている。胴部材1と底部材2の接合は、底部材2
の屈曲部22を、胴部材1の折り返し部13と、胴部1
1の下端部とで挟んで加熱圧着している。
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in more detail with reference to the drawings. FIG. 1 is a partial sectional view of an embodiment of a paper cup for an insulated microwave oven according to the present invention in a state before foaming is performed. As shown in FIG. 1A, the microwave-compatible paper cup a includes a body member 1 and a bottom member 2. The torso member 1 includes a torso 11,
A top curl portion 12 is formed by curling the upper end outward, and a folded portion 13 is formed by folding the lower end inward. On the other hand, the bottom member 2 has a bottom surface 21U that is concave downward from the inner surface side.
And a bent portion 22 formed by bending the outer peripheral edge downward substantially at a right angle. The joining of the body member 1 and the bottom member 2
The bent portion 22 of the trunk member 1 and the folded portion 13 of the trunk member 1
1 and thermocompression-bonded.

【0012】この底面部21Uは、図1−bに示すよう
に、内面側から下方に凹状に変形したU字形状をしてい
る。好ましくは、図1−cに示すように、下面部21U
aと壁面部21Ubとからなるトレー形状であり、下面
部21Uaは平面状とし、壁面部21Ubは胴部材1の
折り返し部13に近ずけることが好ましい。また、底面
部21Uの最大深さは、胴部材1の折り返し部13の上
端から折り返し部13の幅の70%以上が望ましい。7
0%以上にすることによって、電子レンジ内で糸じり部
Zの裏側からのマイクロ波の照射を遮ることができ、糸
じり部Zの焦げの発生を防ぐことができる。70%未満
の場合には、糸じり部Zが焦げる危険がある。
As shown in FIG. 1B, the bottom surface 21U has a U-shape that is concavely deformed downward from the inner surface side. Preferably, as shown in FIG.
a and a wall portion 21Ub, the lower surface portion 21Ua is preferably flat, and the wall surface portion 21Ub is preferably close to the folded portion 13 of the body member 1. Also, the maximum depth of the bottom surface 21U is desirably 70% or more of the width of the folded portion 13 from the upper end of the folded portion 13 of the body member 1. 7
By setting it to 0% or more, it is possible to block microwave irradiation from the back side of the twisting portion Z in the microwave oven, and it is possible to prevent scorching of the twisting portion Z. If it is less than 70%, there is a risk that the threaded portion Z will burn.

【0013】また、下面部21Uaと胴部11の下端に
より形成される下端面Xとの距離xは、上方に8mm未
満、下方に2mm未満の範囲が好ましい。距離xが、図
2−aに示すように、上方に8mm以上の場合には、糸
じり部Zの裏側からのマイクロ波を遮蔽する効果がなく
なる。また、距離xが、図2−bに示すように、下方に
2mm以上の場合には、電子レンジ対応紙カップAは、
安定性を失う危険がある。
The distance x between the lower surface 21Ua and the lower end surface X formed by the lower end of the body 11 is preferably less than 8 mm upward and less than 2 mm downward. When the distance x is 8 mm or more upward as shown in FIG. 2A, the effect of shielding the microwave from the back side of the threaded portion Z is lost. When the distance x is 2 mm or more downward as shown in FIG.
There is a risk of losing stability.

【0014】つぎに、胴部材1、あるいは底部材2の発
泡する前状態での材料構成は、基本的には、図3−aに
示すように、表面側から表面熱可塑性樹脂層5、基材層
としての紙層3、そして裏面熱可塑性樹脂層6となって
いる。そして、発泡した後では、図3−bに示すよう
に、表面側から発泡層5a、基材層としての紙層3、そ
して裏面熱可塑性樹脂層6となっている。紙層3の表面
側には印刷層4を設けることができ、この印刷層4は表
面熱可塑性樹脂層5によって、被覆されている。この印
刷層4は、表面熱可塑性樹脂層5の表面に設けることも
できる。また、紙層3と裏面熱可塑性樹脂層6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 structure of the body member 1 or the bottom member 2 before foaming basically includes, as shown in FIG. A paper layer 3 as a material layer and a backside thermoplastic resin layer 6 are provided. After foaming, as shown in FIG. 3B, the foam layer 5a, the paper layer 3 as a base material layer, and the back thermoplastic resin layer 6 are formed from the front side. A printing layer 4 can be provided on the front side of the paper layer 3, and the printing layer 4 is covered with a surface thermoplastic resin layer 5. This printing layer 4 can be provided on the surface of the surface thermoplastic resin layer 5. In addition, an aluminum foil layer or the like may be provided between the paper layer 3 and the back thermoplastic resin layer 6 in order to increase barrier properties and the like.

【0015】基材層となる紙層3は、坪量が100〜4
00g/m2の範囲が、紙カップの製造上好ましい。ま
た、この紙層3の含水率は、3〜10%の範囲が好まし
く、さらに好ましくは、5〜8%の範囲で安定させるこ
とがより好ましい。紙の中の水分を蒸発させ、その蒸気
圧の力で表面熱可塑性樹脂層5を発泡させて発泡層5a
を形成するというのが原理となっている。
The paper layer 3 serving as the base material layer has a basis weight of 100 to 4
A range of 00 g / m 2 is preferred for the production of paper cups. The moisture content of the paper layer 3 is preferably in the range of 3 to 10%, more preferably in the range of 5 to 8%. The moisture in the paper is evaporated, and the surface thermoplastic resin layer 5 is foamed by the force of the vapor pressure to form a foamed layer 5a.
The principle is to form

【0016】印刷層4は、紙層3の表面あるいは表面熱
可塑性樹脂層5の表面に施される。この印刷層4は、部
分的に着色インキで印刷される場合と、全面的に着色イ
ンキで印刷される場合とがある。印刷の位置、印刷面積
の大小、印刷の方法、使用されるインキなどは、従来公
知の技術を適宜選択して用いることができる。
The printing layer 4 is applied to the surface of the paper layer 3 or the surface of the surface thermoplastic resin layer 5. The printing layer 4 may be partially printed with colored ink or entirely printed with colored ink. The printing position, the size of the printing area, the printing method, the ink used, and the like can be appropriately selected from conventionally known techniques and used.

【0017】表面熱可塑性樹脂層5および裏面熱可塑性
樹脂層6に使用する熱可塑性樹脂は、ポリエチレン樹
脂、ポリプロピレン樹脂、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である。この熱可
塑性樹脂を紙層3の表と裏の両面に積層する方法には、
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
法などがある。発泡する前の表面熱可塑性樹脂層5の厚
さは、15〜50μの範囲が好ましい。厚すぎても、薄
すぎても発泡しにくくなる。一方、裏面熱可塑性樹脂層
6の厚さは、特に限定されない。ただ、裏面熱可塑性樹
脂層6を発泡させずに、表面熱可塑性樹脂層5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、紙層3と裏面熱可塑性樹脂層6の間にアルミニウ
ム箔などの層を設けるか、あるいは裏面熱可塑性樹脂6
の熱可塑性樹脂は表面熱可塑性樹脂層5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、高密度
ポリエチレン樹脂、ポリプロピレン、ポリエステル、ナ
イロン、エチレンビニルアルコール、エチレン−酢酸ビ
ニル共重合体などが挙げられる。厚さとしては、15〜
60μmの範囲が好ましい。これらの熱可塑性樹脂は、
押し出し加工あるいはラミネート加工によって、裏面熱
可塑性樹脂層6が形成される。この裏面熱可塑性樹脂層
6に使用する熱可塑性樹脂は、内容物の保護、特に液状
の物質を入れても洩れない機能、また、熱シールにより
胴部材1の貼り合わせ、そして胴部材1と底部材2の接
着を可能にする機能を持っている必要がある。
The thermoplastic resin used for the front thermoplastic resin layer 5 and the rear thermoplastic resin layer 6 is polyethylene resin, polypropylene resin, polyester resin, polyvinyl chloride resin, polystyrene resin, or the like. The method of laminating the thermoplastic resin on both the front and back sides of the paper layer 3 includes:
There are an extrusion coating method in which a resin is melted and applied, and a lamination method in which a film is adhered. The thickness of the surface thermoplastic resin layer 5 before foaming is preferably in the range of 15 to 50 μm. If it is too thick or too thin, it is difficult to foam. On the other hand, the thickness of the back thermoplastic resin layer 6 is not particularly limited. However, in order to foam only the front thermoplastic resin layer 5 without foaming the rear thermoplastic resin layer 6, a method for preventing evaporation of water vapor from the rear surface is described below. A layer of aluminum foil or the like, or a backside thermoplastic resin 6
As the thermoplastic resin, a thermoplastic resin having a higher softening point than the thermoplastic resin of the surface thermoplastic resin layer 5 is used. For example, high-density polyethylene resin, polypropylene, polyester, nylon, ethylene vinyl alcohol, ethylene-vinyl acetate copolymer and the like can be mentioned. As for the thickness, 15
A range of 60 μm is preferred. These thermoplastics are
The back surface thermoplastic resin layer 6 is formed by extrusion or lamination. The thermoplastic resin used for the backside thermoplastic resin layer 6 has a function of protecting the contents, in particular, a function of not leaking even when a liquid substance is put in, a bonding of the body member 1 by heat sealing, and a bonding between the body member 1 and the bottom. It is necessary to have a function that enables the bonding of the material 2.

【0018】特に、底部材2の材料は、底面部21を凹
状に変形する時、変形しやすく、変形時に、ひび割れや
ピンホールが生じない構成を選定する必要があり、ポリ
エステル樹脂層、ナイロン樹脂層を有する構成が好まし
い。
In particular, the material of the bottom member 2 must be selected so as to be easily deformed when the bottom portion 21 is deformed into a concave shape, and to have no cracks or pinholes when deformed. A configuration having a layer is preferred.

【0019】図4は、上記のような構成の材料を使用し
て作られた表面熱可塑性樹脂層5を発泡する前の図1に
示すような断熱電子レンジ対応紙カップaの表面熱可塑
性樹脂層5を発泡して発泡層5aとした本発明の断熱電
子レンジ対応紙カップAを示す図である。本実施例の断
熱電子レンジ対応紙カップAでは、胴部材1および底部
材2の両部分を発泡層5aとしているが、発泡層5a
は、胴部材1単独、あるいは底部材2単独に設けてもよ
い。
FIG. 4 shows the surface thermoplastic resin layer of a heat-insulated microwave oven-compatible paper cup a as shown in FIG. 1 before foaming the surface thermoplastic resin layer 5 made of the material having the above-described structure. FIG. 5 is a view showing a heat-insulated microwave oven-compatible paper cup A of the present invention in which a foamed layer 5 is formed into a foamed layer 5a. In the heat-insulated microwave oven-compatible paper cup A of this embodiment, both the body member 1 and the bottom member 2 have the foamed layer 5a.
May be provided on the trunk member 1 alone or on the bottom member 2 alone.

【0020】つぎに、本発明の断熱電子レンジ対応紙カ
ップを製造する方法について説明する。
Next, a method of producing the paper cup for an insulated microwave oven according to the present invention will be described.

【0021】まず、表面熱可塑性樹脂層5を発泡する前
の断熱電子レンジ対応紙カップを作製する。この断熱電
子レンジ対応紙カップaは、印刷が施された紙層3の表
側に表面熱可塑性樹脂層5が裏側に裏面熱可塑性樹脂層
6が積層された積層体を、打ち抜き加工で打ち抜いた図
5に示すような胴部ブランク31と底部ブランク32と
から製造されるが、その製造方法は、大きく二つの方法
に分けることができる。
First, a paper cup for a heat-insulated microwave oven before foaming the surface thermoplastic resin layer 5 is prepared. This insulated microwave oven-compatible paper cup a is obtained by punching out a laminate in which a front surface thermoplastic resin layer 5 is laminated on the front side of a printed paper layer 3 and a rear surface thermoplastic resin layer 6 is laminated on the back side. Is manufactured from the body blank 31 and the bottom blank 32 as shown in FIG. 1 and the manufacturing method can be roughly divided into two methods.

【0022】一つの方法は、図6に示すように、まず一
般的な紙カップPと同様な形状の紙カップを作製する。
この底部材2を変形する前の紙カップの製造は、紙カッ
プ成型機で一般的な紙カップPと同様に成型することが
できる。一般的に、胴部ブランク31は、あらかじめ前
工程で打ち抜かれたものを使用し、底部ブランク32
は、紙カップ成型機上で打ち抜かれる。この底面部21
が底上げとなっている紙カップをつぎの工程で底面部2
1を下方に凹状に変形してU字形状の底面部21Uとす
る方法である。
In one method, as shown in FIG. 6, a paper cup having the same shape as a general paper cup P is first prepared.
The production of the paper cup before the deformation of the bottom member 2 can be performed by a paper cup molding machine in the same manner as a general paper cup P. In general, the body blank 31 used is one that has been punched in the previous step, and the bottom blank 32 is used.
Is punched on a paper cup molding machine. This bottom part 21
In the next step, the paper cup with the bottom raised
This is a method in which 1 is concavely deformed downward to form a U-shaped bottom portion 21U.

【0023】もう一つの方法は、図7に示すように、予
め、胴部材1と底部材2とを別の工程で加工しておく。
そして、つぎの工程で、筒状に成形した胴部材1aとU
字形状の底面部21Uを有する底部材2aとを、底部材
1の屈曲部22を胴部材1の折り返し部13と胴部11
の下端部とで挟んで接合する方法である。
In another method, as shown in FIG. 7, the body member 1 and the bottom member 2 are previously processed in another step.
Then, in the next step, the cylindrical body member 1a and U
A bottom member 2a having a U-shaped bottom portion 21U, a bent portion 22 of the bottom member 1 is replaced with a folded portion 13 of the trunk member 1 and a trunk portion 11
This is a method of sandwiching and joining with the lower end portion of the base.

【0024】つぎに、この成形された発泡前の断熱電子
レンジ対応紙カップa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、表面熱可塑性樹脂層5に発泡構造を生成させ発
泡層5aとすることによって、表面に発泡層5aを有す
る本発明の断熱電子レンジ対応紙カップAを製造するこ
とができる。
Next, by heating the pre-foamed, insulated microwave oven-compatible paper cup a, the water in the paper evaporates, and the vapor pressure and the thermal expansion of the air are added to act on the paper cup. By generating a foamed structure in the thermoplastic resin layer 5 to form the foamed layer 5a, the paper cup A for an insulated microwave oven of the present invention having the foamed layer 5a on the surface can be manufactured.

【0025】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〜5分の範囲が好ましい。
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 conditions, a temperature of 10
The temperature is preferably in the range of 0 to 200 ° C.
A range from seconds to 5 minutes is preferred.

【0026】なお、本発明の断熱電子レンジ対応紙カッ
プAの製造方法としては、前述のように、紙カップの底
面部21を凹状にして底面部21Uとした発泡前の断熱
電子レンジ対応紙カップaを成形し、そのつぎの工程で
発泡して断熱電子レンジ対応紙カップAを製造する製造
方法以外に、図8に示すように、一般的な紙カップの形
状において予め発泡しておき、つぎの工程で底面部21
を凹状に変形してU字形状の底面部21Uとして断熱電
子レンジ対応紙カップAを製造する製造方法もある。
As described above, the method for manufacturing the heat-insulated microwave oven-compatible paper cup A of the present invention is to form the heat-insulated microwave oven-compatible paper cup a before foaming, in which the bottom 21 of the paper cup is concave and the bottom 21U is formed. Then, in addition to the manufacturing method of manufacturing the heat-insulated microwave oven-compatible paper cup A by foaming in the next step, as shown in FIG. 21
There is also a manufacturing method for manufacturing a heat-insulated microwave oven-compatible paper cup A as a U-shaped bottom portion 21U by deforming the paper cup A into a concave shape.

【0027】あるいは、もう一つの方法は、図9に示す
ように、予め、筒状に成形した発泡した胴部材1aとU
字形状の底面部21Uを有する発泡した底部材2aとを
別の工程で加工しておく。そして、つぎの工程で、底部
材1の屈曲部22を胴部材1の折り返し部13と胴部1
1の下端部とで挟んで接合して断熱電子レンジ対応紙カ
ップAを製造する製造方法もある。
Alternatively, as shown in FIG. 9, a foamed body member 1a previously formed into a tubular shape and a U-shaped
The foamed bottom member 2a having the U-shaped bottom portion 21U is processed in another step. Then, in the next step, the bent portion 22 of the bottom member 1 is connected to the folded portion 13 of the trunk member 1 and the trunk portion 1.
There is also a manufacturing method of manufacturing a heat-insulated microwave oven-compatible paper cup A by sandwiching and joining with the lower end portion of the paper cup A.

【0028】本発明の断熱電子レンジ対応紙カップの用
途としては、コーヒー、紅茶、スープなどの温めて使用
する飲料用の容器、あるいはインスタントラーメン、惣
菜などの温める即席食品用の容器がある。
The use of the insulated microwave oven-compatible paper cup of the present invention includes a container for drinking beverages such as coffee, tea and soup, and a container for instant foods such as instant noodles and prepared foods.

【0029】[0029]

【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。
Next, the present invention will be described more specifically with reference to examples.

【0030】〔実施例〕胴部材1の材料として、表面か
ら低密度ポリエチレン樹脂層40μm/印刷層/カップ
原紙280g/m2/低密度ポリエチレン樹脂と高密度
ポリエチレン樹脂との混合樹脂層25μmの構成の材料
を使用し、底部材2の材料として、表面から低密度ポリ
エチレン樹脂30μm/カップ原紙220g/m2/低
密度ポリエチレン樹脂25μmの構成の材料を使用し
た。まず、図4のような胴部材ブランク31に打ち抜
き、この胴部材ブランク31をマンドレルに巻き付け、
筒状の胴部材1に形成した。つぎに、一般的な紙カップ
の成形機で、胴部材1の下方から底部ブランク32を嵌
め込み、接着部分を熱風で加熱し、胴部材1の下端を内
側に折り返して折り返し部13とした。つづいて、胴部
材1の上端を外側にカールしトップカール部12を形成
した。作製した紙カップの底面部21をつぎの工程で下
方に凹状に変形してU字形状の底面部21Uとして発泡
前の電子レンジ対応紙カップaを作成した。さらにこの
電子レンジ対応紙カップaを、120°Cの乾燥機の中
で3分間加熱し、表面熱可塑性樹脂層5を発泡させ、図
5に示すように、表面に発泡層5aを有する断熱電子レ
ンジ対応紙カップAを得た。
[Embodiment] As a material of the body member 1, a low-density polyethylene resin layer 40 μm from the surface / printing layer / cup base paper 280 g / m 2 / mixed resin layer of low-density polyethylene resin and high-density polyethylene resin 25 μm from the surface Was used as the material of the bottom member 2 from the surface of a low-density polyethylene resin 30 μm / cup base paper 220 g / m 2 / low-density polyethylene resin 25 μm. First, a blank is punched into a body member blank 31 as shown in FIG. 4, and the body member blank 31 is wound around a mandrel.
It was formed on a cylindrical body member 1. Next, using a general paper cup forming machine, the bottom blank 32 was fitted from below the body member 1, the adhesive portion was heated with hot air, and the lower end of the body member 1 was folded inward to form a folded portion 13. Subsequently, the top curl portion 12 was formed by curling the upper end of the body member 1 outward. The bottom portion 21 of the produced paper cup was concavely deformed downward in the following step to prepare a microwave-compatible paper cup a before foaming as a U-shaped bottom portion 21U. Further, the microwave oven-compatible paper cup a is heated for 3 minutes in a dryer at 120 ° C. to foam the surface thermoplastic resin layer 5, and as shown in FIG. A corresponding paper cup A was obtained.

【0031】〔比較例〕胴部材1の材料として、表面か
らカップ原紙280g/m2/低密度ポリエチレン樹脂
μmの構成の材料を使用し、底部材2の材料として、表
面からカップ原紙255g/m2/低密度ポリエチレン
樹脂25μmの構成の材料を使用し、紙カップの胴部材
1の胴部11の外径、高さなど胴部材1の形状を実施例
と同一にし、底部材2の底面部21は平面状である従来
の形状で作成した。
[Comparative Example] As a material of the body member 1, a material having a structure of 280 g / m 2 of cup base paper / μm of low-density polyethylene resin from the surface was used. As a material of the bottom member 2, 255 g / m of cup base paper from the surface. 2 / Using a low-density polyethylene resin material having a structure of 25 μm, the shape of the body member 1 such as the outer diameter and height of the body portion 11 of the body member 1 of the paper cup is made the same as that of the embodiment, and the bottom portion 21 of the bottom member 2 is formed. Was made in a conventional shape that is flat.

【0032】本発明の電子レンジ対応紙カップの実施
例、そして実施例と同じ外寸法の比較例の紙カップに水
200mlを入れ、電子レンジ(NEC社製、電子レン
ジMC−E2家庭用高周波出力:500W)にて加熱調
理を行なった。その結果、実施例においては、紙カップ
のどの部分にも焦げの発生は見られなかった。一方、比
較例においては、加熱調理2分後に糸じり部がやや茶色
に変色し、5分後には糸じり部に焦げが発生した。ま
た、加熱調理した内容物が入った状態で、手で持った
時、本発明の電子レンジ対応紙カップの実施例では、比
較例に比べて熱さを感じにくく、持ちやすかった。
200 ml of water was put into an example of the paper cup of the microwave oven-compatible paper cup of the present invention and a comparative example having the same outer dimensions as the embodiment, and a microwave oven (manufactured by NEC Corporation, microwave oven MC-E2, high frequency output for home use: 500 W) ). As a result, in the examples, no scorching was observed in any part of the paper cup. On the other hand, in the comparative example, the twisted portion turned slightly brown after 2 minutes of the cooking, and scorched in the twisted portion after 5 minutes. In addition, when the content was heated and cooked, when held by hand, the example of the microwave-compatible paper cup of the present invention was less likely to feel heat than the comparative example, and was easy to hold.

【0033】[0033]

【発明の効果】本発明によれば、発泡層により、断熱効
果が十分あり、滑り止め効果があり、デザイン的に独特
な風合いを持ち、そして製造コストが低い断熱紙カップ
であって、紙カップの底面の形状が下方に凹状に変形し
てU字形状であることによって、紙カップの中に、飲料
や即席食品などの内容物を入れ、電子レンジで加熱調理
した時に、焦げを発生させることのない断熱電子レンジ
対応紙カップを得ることができる。
According to the present invention, a foamed layer has a sufficient heat insulating effect, has a non-slip effect, has a unique texture in design, and has a low manufacturing cost. The shape of the U-shape is deformed concavely downward, so that the contents such as beverages and ready-to-eat foods are put in a paper cup, and when heated and cooked in a microwave oven, heat insulation that does not cause scorching A microwave-compatible paper cup can be obtained.

【図面の簡単な説明】[Brief description of the drawings]

【図1】本発明による断熱電子レンジ対応紙カップの発
泡前を示す一部を切欠断面とした概略断面図である。
FIG. 1 is a schematic cross-sectional view showing a part of a heat-insulated microwave oven-compatible paper cup according to the present invention before foaming, the part being cut away.

【図2】本発明による断熱電子レンジ対応紙カップの底
部材の形状を示す部分断面図である。
FIG. 2 is a partial sectional view showing a shape of a bottom member of the paper cup for an insulated microwave oven according to the present invention.

【図3】本発明による断熱電子レンジ対応紙カップの胴
部材および底部材の材料構成を示す概略断面図である。
FIG. 3 is a schematic sectional view showing a material configuration of a body member and a bottom member of the paper cup for an insulated microwave oven according to the present invention.

【図4】本発明による断熱電子レンジ対応紙カップを示
す一部を切欠断面とした概略断面図である。
FIG. 4 is a schematic sectional view of a partially cutaway sectional view showing a paper cup for an insulated microwave oven according to the present invention.

【図5】本発明による断熱電子レンジ対応紙カップの胴
部材のブランクおよび底部材のブランクを示す展開図で
ある。
FIG. 5 is a developed view showing a blank of a body member and a blank of a bottom member of the paper cup for an insulated microwave oven according to the present invention.

【図6】本発明による断熱電子レンジ対応紙カップを製
造する方法を説明する図である。
FIG. 6 is a diagram illustrating a method of manufacturing a paper cup for an insulated microwave oven according to the present invention.

【図7】本発明による断熱電子レンジ対応紙カップを製
造するもう一つの方法を説明する図である。
FIG. 7 is a diagram illustrating another method of manufacturing a paper cup for an insulated microwave oven according to the present invention.

【図8】本発明による断熱電子レンジ対応紙カップを製
造する別の方法を説明する図である。
FIG. 8 is a diagram illustrating another method of manufacturing a paper cup for an insulated microwave oven according to the present invention.

【図9】本発明による断熱電子レンジ対応紙カップを製
造するさらに別の方法を説明する図である。
FIG. 9 is a view illustrating still another method of manufacturing a paper cup for an insulated microwave oven according to the present invention.

【図10】従来の紙カップを示す一部を切欠断面とした
概略断面図である。
FIG. 10 is a schematic sectional view showing a conventional paper cup with a part cut away.

【符号の説明】[Explanation of symbols]

A 断熱電子レンジ対応紙カップ a 断熱電子レンジ対応紙カップ(発泡前) P 紙カップ(従来) Z 糸じり部 1 胴部材 1a 胴部材(接合前) 2 底部材 2a 底部材(接合前) 3 紙層 4 印刷層 5 表面熱可塑性樹脂層 5a 発泡層 6 裏面熱可塑性樹脂層 11 胴部 12 トップカール部 13 折り返し部 21 底面部 21U 底面部(変形後) 21Ua 下面部(変形後) 21Ub 側壁部(変形後) 22 屈曲部(底部材) 31 胴部ブランク 32 底部ブランク A Paper Cup for Insulated Microwave Oven a Paper Cup for Insulated Microwave Oven (Before Foaming) P Paper Cup (Conventional) Z Threading Part 1 Body Member 1a Body Member (Before Joining) 2 Bottom Member 2a Bottom Member (Before Joining) 3 Paper Layer 4 Printing layer 5 Surface thermoplastic resin layer 5a Foam layer 6 Back thermoplastic resin layer 11 Body part 12 Top curl part 13 Folded part 21 Bottom part 21U Bottom part (after deformation) 21Ua Bottom part (after deformation) 21Ub Side wall part (after deformation) 22) Bent portion (bottom member) 31 Body blank 32 Bottom blank

───────────────────────────────────────────────────── フロントページの続き (72)発明者 遠藤 憲一 東京都新宿区市谷加賀町一丁目1番1号 大日本印刷株式会社内 Fターム(参考) 3E067 AA03 AA11 AB01 AB26 AC01 BA07A BB01A BB14A BB17A BB25A BC03A BC07A CA17 CA18 EA03 EB27 EE48 FA01 FC01  ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Kenichi Endo 1-1-1 Ichigaya-Kaga-cho, Shinjuku-ku, Tokyo F-term in Dai Nippon Printing Co., Ltd. (reference) 3E067 AA03 AA11 AB01 AB26 AC01 BA07A BB01A BB14A BB17A BB25A BC03A BC07A CA17 CA18 EA03 EB27 EE48 FA01 FC01

Claims (4)

【特許請求の範囲】[Claims] 【請求項1】 筒状の胴部と、該胴部の上端側を折り曲
げたトップカール部と、該胴部の下端を内側に折り返し
た折り返し部とを有する胴部材と、底面部と、該底面部
の外周縁部を折り曲げた屈曲部とを有する底部材とを備
えて前記胴部と前記折り返し部との間に前記屈曲部が挟
み込まれて互いに接合された紙カップの前記底面部を凹
状とした電子レンジ対応紙カップであって、 前記紙カップは、少なくとも外面側から熱可塑性樹脂の
発泡層と、紙を主体とする基材層と、熱可塑性樹脂層と
を備えていることを特徴とする断熱電子レンジ対応紙カ
ップ。
A torso member having a cylindrical body, a top curl portion formed by bending an upper end of the body portion, a folded portion formed by folding a lower end of the body portion inward, a bottom portion, A bottom member having a bent portion obtained by bending the outer peripheral edge of the bottom portion, the bottom portion of the paper cup joined to each other with the bent portion sandwiched between the body portion and the folded portion and having a concave shape. A microwave oven-compatible paper cup, wherein the paper cup comprises a foamed layer of a thermoplastic resin, a base layer mainly composed of paper, and a thermoplastic resin layer at least from the outer surface side. Microwave-compatible paper cup.
【請求項2】 前記胴部材が、前記発泡層を有すること
を特徴とする請求項1に記載する断熱電子レンジ対応紙
カップ。
2. The insulated microwave oven-compatible paper cup according to claim 1, wherein the body member has the foam layer.
【請求項3】 前記底部材が、前記発泡層を有すること
を特徴とする請求項1に記載する断熱電子レンジ対応紙
カップ。
3. The insulated microwave oven-compatible paper cup according to claim 1, wherein the bottom member has the foam layer.
【請求項4】 前記胴部材および前記底部材が、前記発
泡層を有することを特徴とする請求項1に記載する断熱
電子レンジ対応紙カップ。
4. The paper cup according to claim 1, wherein the body member and the bottom member have the foam layer.
JP2000387762A 2000-12-14 2000-12-20 Insulated microwave cup Expired - Fee Related JP4770018B2 (en)

Priority Applications (9)

Application Number Priority Date Filing Date Title
JP2000387762A JP4770018B2 (en) 2000-12-20 2000-12-20 Insulated microwave cup
CNB018206123A CN1320870C (en) 2000-12-14 2001-12-14 Microwave oven-compatible paper cup and method of mfg. paper cup
TW90131044A TWI224500B (en) 2000-12-14 2001-12-14 Microwave oven-compatible paper cup and method of manufacturing the paper cup
CN2007100961954A CN101117163B (en) 2000-12-14 2001-12-14 Microwave oven-compatible paper cup
CN2007100961935A CN101531260B (en) 2000-12-14 2001-12-14 Microwave oven-compatible paper cup
PCT/JP2001/010988 WO2002047523A1 (en) 2000-12-14 2001-12-14 Microwave oven-compatible paper cup and method of manufacturing the paper cup
KR1020037007591A KR100816458B1 (en) 2000-12-14 2001-12-14 Microwave oven-compatible paper cup and method of manufacturing the paper cup
HK08106209.6A HK1111664A1 (en) 2000-12-14 2008-06-04 Paper cup for microwave oven
HK10100768.8A HK1134475A1 (en) 2000-12-14 2010-01-25 Microwave oven-compatible paper cup

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2000387762A JP4770018B2 (en) 2000-12-20 2000-12-20 Insulated microwave cup

Publications (2)

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JP2002193348A true JP2002193348A (en) 2002-07-10
JP4770018B2 JP4770018B2 (en) 2011-09-07

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
JP2009220863A (en) * 2008-03-17 2009-10-01 Dainippon Printing Co Ltd Heat-insulating vessel for microwave oven and method of manufacturing heat-insulating vessel for microwave oven
JP2016050045A (en) * 2014-08-28 2016-04-11 大日本印刷株式会社 Paper cup for electronic oven
JP2016050044A (en) * 2014-08-28 2016-04-11 大日本印刷株式会社 Paper cup for electronic oven

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6056311B2 (en) * 2012-09-20 2017-01-11 凸版印刷株式会社 Cup type paper container and method for manufacturing the same

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000128143A (en) * 1998-10-28 2000-05-09 Nippon Kamiparupu Shoji Kk Container, and its manufacture

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000128143A (en) * 1998-10-28 2000-05-09 Nippon Kamiparupu Shoji Kk Container, and its manufacture

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
JP2009220863A (en) * 2008-03-17 2009-10-01 Dainippon Printing Co Ltd Heat-insulating vessel for microwave oven and method of manufacturing heat-insulating vessel for microwave oven
JP2016050045A (en) * 2014-08-28 2016-04-11 大日本印刷株式会社 Paper cup for electronic oven
JP2016050044A (en) * 2014-08-28 2016-04-11 大日本印刷株式会社 Paper cup for electronic oven

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