JP4288739B2

JP4288739B2 - Thermal insulation paper container

Info

Publication number: JP4288739B2
Application number: JP02221799A
Authority: JP
Inventors: 良高木村
Original assignee: Toppan Inc
Current assignee: Toppan Inc
Priority date: 1999-01-29
Filing date: 1999-01-29
Publication date: 2009-07-01
Anticipated expiration: 2019-01-29
Also published as: JP2000219279A

Description

【０００１】
【発明の属する技術分野】
本発明は、スープ、コーヒーなどの飲料や麺類などの即席食品に用いられる断熱性の紙容器に関する。
【０００２】
【従来の技術】
従来、麺類などの収容物に熱湯を注いで食する断熱性容器としては、例えば、発泡ポリスチレン樹脂などを成形したプラスチック容器、耐水加工した紙カップ本体の胴部側壁の外側に波状紙を貼着し、さらに、波状紙の上から薄紙を貼着して空気断熱層を形成させた紙容器、紙容器の胴部側壁に発泡インキ等の塗布膜を形成させた後、加熱等により塗布膜を発泡させて発泡層を形成させた容器などが知られている。
【０００３】
ところが、材質に発泡樹脂を使用する容器は断熱性には優れているものの、燃焼カロリーが高く、焼却、廃棄上問題があり、さらには消費者の環境意識の高まりに伴う消費行動の変化により発泡樹脂に変わる易廃棄性、易燃焼性の容器が求められている。
【０００４】
また、紙カップに波状紙や薄紙を巻き付け貼着し、空気断熱層を形成させた紙容器は、易廃棄性、易燃焼性には問題ないものの、接着剤を使用しているため糊付け工程が必要になり、また、紙カップ、波状紙、薄紙の３部材から成るためコスト高である。
【０００５】
さらに、紙カップの胴部側壁に熱可塑性樹脂を積層し、紙カップを加熱することで胴部側壁の熱可塑性樹脂を発泡させた断熱性容器が知られているが、この容器は、発泡層の厚さがせいぜい０．３ｍｍ程度で、断熱性が不十分であり、かつ、印刷層の上に発泡層を設けるため印刷表示が不鮮明になる。また、印刷効果を高めるために発泡層の表面に筒体を取り付ける手段も考えられるが、両部材を接着剤で接着する必要があり、この発泡層に接着可能な接着剤は臭気発生の問題があり、内容物として食品を収容するのには適さない。
【０００６】
【発明が解決しようとする課題】
本発明は、断熱容器に関する以上のような問題点に着目してなされたもので、安価に作製でき、易廃棄性、易燃焼性を有し、食品を収容するに適した紙製の断熱容器を提供することを目的とする。
【０００７】
【発明が解決しようとする課題】
本発明の第1の発明は、胴部と底部とからなり、開口部周縁が外側にカールした口縁部を有する紙カップ本体の胴部に、パルプモールド原料からなる断熱材を塗布量１００〜３００ｇ／ｍ ² で固着させたことを特徴とする断熱性紙容器である。
【００１０】
また、第２の発明は、胴部と底部とからなり、開口部周縁が外側にカールした口縁部を有する紙カップ本体の胴部に、略等間隔で縦方向の断続線状の複数の凸条を設け、胴部に被せるスリーブ状の筒体に、内方に突出し、かつ紙カップ本体の胴部に設けた断続線状凸条の凸部と接触する複数の筒体凸条を設け、胴部に筒体を被せて凸条の凸部と筒体とを貼着させ、凸条以外の部分と筒体との間に断熱空間層を設けたことを特徴とする断熱性紙容器である。
【００１２】
さらにまた、第３の発明は、第２の発明において、筒体に設ける複数の筒体凸条が、それぞれ環状に設けられていることを特徴とする断熱性紙容器である。
【００１３】
さらにまた、第３の発明は、胴部と底部とからなり、開口部周縁が外側にカールした口縁部を有する紙カップ本体の胴部に、略等間隔で縦方向の断続線状の複数の凸条を設け、胴部にスリーブ状の筒体に、上端近傍から下端近傍に縦方向に一定間隔で鉤括弧状の切り込みを設け、括弧の先端と末端を折り曲げ線で結び、切り込みを外側に折り返し、複数の羽根板を設け、羽根板が胴部凸条で固定されるように立設し、胴部に筒体を被せて凸条の凸部と筒体とを貼着させ、凸条以外の部分と筒体との間に断熱空間層を設けたことを特徴とする断熱性紙容器である。
【００１４】
【作用】
上記のように本発明によれば、紙カップ本体の胴部に、パルプモールド原料を断熱材として塗布量１００〜３００ｇ／ｍ ² で固着させることで、紙カップ本体から剥がれ難くく、断熱効果の優れた紙容器が得られる。また、紙カップ本体の胴部に、略等間隔で縦方向の断続線状の複数の凸条を設け、胴部に被せるスリーブ状の筒体に、内方に突出し、かつ紙カップ本体の胴部に設けた断続線状凸条の凸部と接触する複数の筒体凸条を設け、胴部に筒体を被せて凸条の凸部と筒体とを貼着させ、凸条以外の部分と筒体との間に断熱空間層を設けたので、断熱効果の優れた紙容器が得られる。
【００１５】
さらに、筒体に内方に突出し、かつ、紙カップ本体の胴部に設けた断続線状凸条の凸部と接触する複数の筒体凸条を設けたので、断熱効果の優れた紙容器が得られる。さらにまた、筒体に上端近傍から下端近傍に縦方向に一定間隔で鉤括弧状の切り込みを設け、括弧の先端と末端を折り曲げ線で結び、切り込みを外側に折り返し、複数の羽根板を設け、この羽根板が胴部凸条で固定されるように立設したので、一層の断熱効果を有する紙製容器が得られる。
【００１６】
【発明の実施の形態】
以下実施例により本発明を詳細に説明する。
本発明の断熱性紙容器は、例えば図１に示すように、胴部１１と底部１２からなり、開口部周縁が外側にカールした口縁部１３を有する紙カップ本体１０の胴部１１に、断熱材２０を固着させた断熱性紙容器１である。
【００１７】
あるいは図２（ａ）、（ｂ）に示すように、胴部１１と底部１２からなり、開口部周縁が外側にカールした口縁部１３を有する紙カップ本体１０の胴部１１に、略等間隔で縦方向の断続線状の複数の凸条１４、１４、…が設けられ、該、胴部１１にスリーブ状の筒体３０を被せて凸条１４と筒体３０とを貼着させ、凸条以外の部分と筒体との間に断熱空間層３５を設けた断熱性紙容器２である。
【００１８】
紙カップ本体１０は、胴部を形成する胴部材、底部を形成する底部材ともに、坪量が１７０〜３１０ｇ／ｍ²程度のカップ原紙の両面、または片面に低密度ポリエチレン樹脂（ＬＤＰＥ）を２０〜４０μｍ程度溶融押出し法により塗布したポリエチレン加工紙を用いて、一般的な紙カップ成形機を使用して作製することができる。
【００１９】
胴部１１に設ける複数の断続線状の凸条１４、１４、…は、一点鎖線、二点鎖線などがこれに該当する。一点鎖線や二点鎖線は単独だけでなく、一点鎖線と二点鎖線を混在させても構わない。
また、凸状の幅は０．５〜６ｍｍ程度、好ましくは２〜３ｍｍ、高さは０．１〜２ｍｍ程度、好ましくは０．２〜０．５ｍｍ、不連続部分の長さは０．５ｍｍ〜２０ｍｍ程度、好ましくは１〜１０ｍｍとすることが、凸条加工時にピンホールの発生を防止する上から好ましい。
【００２０】
凸条を断続線状に設ける理由は、上下方向のみでなく、左右方向にも断熱空間層を設けることにより、空気の流れを上下方法のみでなくいろいろな方向にすることができ、外部と、紙カップ本体と筒体の間の断熱空間層との間での空気の入替えが十分にでき断熱効果を高めることができるからである。
【００２１】
断熱材２０としては、易廃棄性、易燃焼性という観点を考慮すると、パルプモールド原料２１、編み目状に貼り付けた紙紐２２等が好ましく使用できる。
【００２２】
パルプモールド原料２１は、古紙を溶解して液状にしたもので、これを胴部１１に適宜の厚さに吹き付け、乾燥して固着させれば良い。
【００２３】
パルプモールド原料の塗布量（塗布厚）は１００〜３００ｇ／ｍ²（厚さ；０．５〜１ｍｍ）程度が適量である。これより多量になるともろくなって、紙カップ本体の胴部から剥がれ易くなる。
【００２４】
紙糸原料、紙紐原料、ティッシュペーパー等を用いて紙紐に加工する。
太さは０．１〜１ｍｍ程度、これを機械編み等の方法により加工を行い、編み目状にし、紙カップ本体の胴部に貼り、編み目状に貼り付けた紙紐２２とする。あるいは、紙カップ本体を回転する軸に固定し、紙紐の先端を紙カップ本体の胴部に貼り付け、紙カップ本体を回転させると同時に紙紐を上下方向に移動させながら、紙紐を紙カップ本体の胴部に貼り付けると、編み目状に貼り付けた紙紐２２ができる（図５参照）。
【００２５】
紙紐２２を胴部に編み目状に貼り付けることにより、紙カップ本体１０と筒体３０の間に確実に断熱空間層３５を設けることができる。
【００２６】
筒体３０は、坪量が８０〜１２０ｇ／ｍ²程度の白ライナー、コートボール、晒クラフト、アイボリー等の板紙を素材として、紙カップ胴部を覆う大きさの略扇形の形状をいた紙製シートをスリーブ状にしたものである。
なお、略扇形の紙製シートを紙カップ本体の胴部に巻き付け貼着しても構わない。
【００２７】
また、筒体３０の大きさ（高さ）は、胴部の上から下まで胴部全体を覆う大きさでも良いが、通常、手指等で容器を握持する可能性の高い、略上半分が覆われる大きさとしても構わない。
【００２８】
筒体３０に内方に突出する複数の筒体凸条３１、３１、…を設け、紙カップ本体の胴部１１に設けた点線状凸条１４の凸部と接触させるように筒体を胴部に嵌め込んだ断熱性紙容器３とすることもできる（図３（ａ）、（ｂ）参照）。
【００２９】
筒体凸条３１の幅は、紙カップ本体の胴部に設ける凸条１４と同様に、０．５〜６ｍｍ程度、好ましくは２〜３ｍｍ、高さは０．１〜２ｍｍ程度、好ましくは０．２〜０．５ｍｍとすることが。凸条加工時にピンホールの発生を防止する上から好ましい。
【００３０】
さらに筒体のブランクシート３０ａに、上端近傍から下端近傍に向けて、胴部に設けた縦方向の断続線状凸条に相当する間隔で縦方向の鉤括弧状の切り込みｍを設け、括弧の先端と末端を折り曲げ線ｎで結び、切り込みによって生じた凸部を外側に折り返し複数の羽根板３２、３２、…を設ける。
そして、複数の羽根板３２、３２、…を設けたブランクシート３０ａを筒体に成形し、紙カップ本体の胴部１１に嵌め込み、複数の羽根板３２、３２、…が複数の凸条１４、１４、…で固定されるようにした断熱性紙容器４とすることもできる（図４（ａ）、（ｂ）参照）。
【００３１】
【実施例】
以下に本発明の実施例をさらに具体的に説明する。
〈実施例１〉
先ず、坪量２６０ｇ／ｃｍ²のカップ原紙の両面に厚さ２０μｍのＬＤＰＥを塗布した加工紙を用い、一般的な紙カップ成形機を使用して、開口部周縁が外側にカールした口縁部１３を有する、開口径；９５ｍｍ、底径；６５ｍｍ、高さ；１１０ｍｍの紙カップ本体１０を作製した。
【００３２】
別に、古紙を溶解して液状にし、パルプモールド原料２１を作製する。
作製したパルプモールド原料２１を、先に作製した紙カップ本体１０の胴部１１の全面に吹き付け法により塗布して乾燥、固着させ、実施例１の断熱性紙容器１とした（図１参照）。なお、塗布量は１５０ｇ／ｍ²であった。
【００３３】
〈実施例２〉
紙カップ本体の胴部に固着させる断熱材として編み目状の紙紐２２を使用した以外は実施例１と同様の材料と方法により実施例２の断熱性紙容器５を作製した（図５参照）。
編み目状の紙紐２２は、紙ひも原紙を紙紐に加工したものを編み目状に編んだものを用いた。
【００３４】
〈実施例３〉
先ず、坪量２６０ｇ／ｃｍ²のカップ原紙の両面に厚さ２０μｍのＬＤＰＥを塗布した加工紙を準備した。
この加工紙を打ち抜き、紙カップ本体の胴部１１を構成する所定寸法の扇形をした胴部材ブランクとするとともに、扇形に沿って放射状に所定の間隔をおいて、幅；５ｍｍ、高さ；１．５ｍｍ、鎖部の長さ；１０ｍｍ、鎖部と点部の間隔；１０ｍｍ、点部の長さ；３ｍｍの一点鎖線からなる凸条１４を複数本、胴部材ブランクの上下の端縁を除いた部分全体に設けた。
【００３５】
凸条１４を設けた胴部材ブランクと、上記加工紙から別途作製した底部材用ロールから、一般的な紙カップ成形機を使用して、開口径；９５ｍｍ、底径；６５ｍｍ、高さ；１１０ｍｍの口縁部１３を有し、凸条１４が外方に突出した紙カップ本体１０を作製した。
【００３６】
別に、坪量１２０ｇ／ｃｍ²のコートボールを用いて、所定寸法の略扇形のブランクシートに打ち抜き、端縁同士を重ねて貼着してスリーブ状の筒体３０とした。
【００３７】
最後に、紙カップ本体の胴部の凸条１４の凸部にエチレン・酢酸ビニール樹脂系のエマルジョン型接着剤を付けスリーブ状の筒体３０を被せ、筒体は胴部に接着して、凸条以外の部分と筒体との間に断熱空間層３５を有する実施例３の断熱性紙容器２とした（図２（ａ）、（ｂ）参照）。
【００３８】
〈実施例４〉
実施例３で使用した筒体３０となる略扇形のブランクシートに、略等間隔で周方向に、幅；５ｍｍ、高さ；２ｍｍの環状凸条３１を複数本設けた以外は、実施例３と同じ紙カップ本体を使用して実施例３と同様の方法で、紙カップ本体の胴部にスリーブ状にした筒体を被せると、筒体は胴部に接着して、胴部の凸条と筒体の凸条が接触した実施例４の断熱性紙容器３とした（図３（ａ）、（ｂ）参照）。
【００３９】
〈実施例５〉
先ず、実施例３で使用した筒体３０となる略扇形のブランクシート３０ａに、図４（ｂ）に示すような上端近傍から下端近傍に向けて、胴部に設けた縦方向の鉤括弧状の切り込みｍを設け、括弧の先端と末端を折り曲げ線ｎで結び、切り込みによって生じた凸部を外側に折り返し、複数の羽根板３２、３２、…を設けた。
【００４０】
複数の羽根板３２、３２、…を設けたブランクシート３０ａを筒体に成形し、実施例３で用いた紙カップ本体と同様の紙カップ本体の胴部に嵌め込み、エチレン・酢酸ビニール樹脂系のエマルジョン型接着剤を介して接着させ、複数の羽根板３２、３２、…が複数の凸条１４、１４、…で固定されるようにして実施例５の断熱性紙容器４とした（図４（ａ）、（ｂ）参照）。
【００４１】
このようにして作製した５種類の断熱性紙容器の断熱効果を評価するため、各容器に即席麺を入れ、熱湯を注いで３分間放置後、容器の胴部を手指等で握持したが、いずれの容器も容易に手で持つことができた。
【００４２】
【発明の効果】
上記のように本発明の断熱性紙容器は、紙カップ本体の胴部に断熱材を固着させた構成のため、比較的コスト安になる。また、全て紙製品から成るので環境問題に適した紙容器であり、廃棄、焼却が容易である。
また、筒体に羽根板を設けたものは、容器の胴部を手指等で握持した際、滑り難くなり容器のハンドリング性が向上する。
【図面の簡単な説明】
【図１】本発明の断熱性紙容器の一実施例の、一部を切り欠いて示した説明図である。
【図２】本発明の断熱性紙容器の別の実施例を示し、（ａ）は一部を切り欠いて示した説明図であり、（ｂ）は（ａ）のＡ−Ａ’線断面説明図である。
【図３】本発明の断熱性紙容器のさらに別の実施例を示し、（ａ）は一部を切り欠いて示した説明図であり、（ｂ）は斜視説明図である。
【図４】本発明の断熱性紙容器のさらにまた別の実施例を示し、（ａ）は斜視説明図であり、（ｂ）は（ａ）で使用する筒体のブランクシートの説明図である。
【図５】本発明の断熱性紙容器のさらにまた別の実施例を示す斜視説明図である。
【符号の説明】
１、２、３、４、５‥‥断熱性紙容器
１０‥‥紙カップ本体
１１‥‥胴部
１２‥‥底部
１３‥‥口縁部
１４‥‥凸条
２０‥‥断熱材
２１‥‥パルプモールド原料
２２‥‥編み目状に貼り付けた紙紐
３０‥‥筒体
３０ａ‥ブランクシート
３１‥‥凸条
３２‥‥羽根板
３５‥‥断熱空間層
ｍ‥‥切り込み
ｎ‥‥折り曲げ線[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a heat-insulating paper container used for instant foods such as beverages such as soup and coffee and noodles.
[0002]
[Prior art]
Conventionally, as a heat-insulating container that pours hot water into a container such as noodles, for example, a plastic container in which foamed polystyrene resin or the like is molded, a corrugated paper is attached to the outside of the barrel side wall of a water-resistant paper cup body. In addition, a paper container in which thin paper is pasted on the wavy paper to form an air insulation layer, and a coating film such as foaming ink is formed on the barrel side wall of the paper container, and then the coating film is foamed by heating or the like. Containers and the like in which a foamed layer is formed are known.
[0003]
However, although containers using foamed resin are excellent in heat insulation properties, they have high calorie burns, have problems with incineration and disposal, and foaming is caused by changes in consumer behavior due to increased consumer awareness of the environment. There is a demand for easily disposable and easily combustible containers that can be replaced with resin.
[0004]
In addition, paper containers made by wrapping and pasting corrugated paper or thin paper around a paper cup to form an air insulation layer have no problem in terms of easy disposal and flammability. In addition, it is costly because it is made up of three members: a paper cup, corrugated paper, and thin paper.
[0005]
Furthermore, a heat insulating container is known in which a thermoplastic resin is laminated on the body side wall of the paper cup and the thermoplastic resin on the body side wall is foamed by heating the paper cup. At most, it is about 0.3 mm, the heat insulation is insufficient, and the foamed layer is provided on the printed layer, so that the printed display becomes unclear. In order to enhance the printing effect, a means of attaching a cylinder to the surface of the foam layer is also conceivable, but it is necessary to adhere both members with an adhesive, and the adhesive that can adhere to the foam layer has a problem of generating odor. Yes, it is not suitable for containing food as contents.
[0006]
[Problems to be solved by the invention]
The present invention has been made by paying attention to the above-mentioned problems relating to a heat-insulating container, and is a paper heat-insulating container that can be manufactured at a low cost, has easy disposal and easy combustibility, and is suitable for containing food. The purpose is to provide.
[0007]
[Problems to be solved by the invention]
1st invention of this invention consists of a trunk | drum and a bottom part, and the coating amount of 100-300g of the heat insulating material which consists of a pulp mold raw material in the trunk | drum of a paper cup main body which has the lip | edge part which the opening part periphery curled outside. / a heat-insulating paper container, characterized in that was fixed in m ^2.
[0010]
Further, the second invention comprises a plurality of longitudinally-intersecting line-like projections at substantially equal intervals on the body portion of the paper cup body having a mouth portion having a body portion and a bottom portion, and the periphery of the opening portion being curled outward. A plurality of cylindrical ridges are provided on the sleeve-like cylindrical body that is provided on the body portion and protrudes inward and contacts the convex portions of the intermittent line-shaped ridge provided on the body portion of the paper cup body. part covered with a cylindrical body is attached to the convex portion and the cylindrical body of the ridges in is the heat-insulating paper container characterized in that a heat-insulating space layer between the portion and the tubular body other than the ridges .
[0012]
Furthermore, the third invention is the heat insulating paper container according to the second invention, wherein the plurality of cylindrical protrusions provided in the cylindrical body are each provided in an annular shape.
[0013]
Still further, the third invention comprises a plurality of vertically-intersecting line-like lines at substantially equal intervals on a body portion of a paper cup body having a mouth portion having a body portion and a bottom portion, and the periphery of the opening portion being curled outward. Protrusions are provided, and a sleeve-like cylindrical body is provided on the body , and incisions in the form of brackets are provided at regular intervals in the vertical direction from the vicinity of the upper end to the vicinity of the lower end. Folded, provided a plurality of slats, standing up so that the slats are fixed by the trunk ridges, covering the barrels with the cylinders, and sticking the projections and cylinders of the ridges, the ridges The heat insulating paper container is characterized in that a heat insulating space layer is provided between the other portion and the cylindrical body.
[0014]
[Action]
According to the way the present invention, the body of the paper cup body, by fixing at a coverage of 100 to 300 g / m ² pulp molded raw materials as insulation, Ku hardly peeled from the paper cup body, excellent heat insulating effect A paper container is obtained. In addition, the paper cup body is provided with a plurality of longitudinally-intersecting ridges at substantially equal intervals, projecting inwardly into a sleeve-like cylinder covering the body , and on the body of the paper cup body Provide a plurality of cylindrical ridges that come into contact with the convex portions of the provided intermittent linear ridges , cover the barrels with the cylindrical bodies , adhere the convex portions of the ridges and the cylindrical bodies, and portions other than the ridges; Since the heat insulating space layer is provided between the cylindrical body, a paper container having an excellent heat insulating effect can be obtained.
[0015]
Furthermore, since the cylindrical body is provided with a plurality of cylindrical ridges that project inward and come into contact with the convex portions of the intermittent linear ridges provided on the body of the paper cup body, a paper container having an excellent heat insulation effect is provided. can get. Furthermore, the cylindrical body is provided with a bracket-like cut at a certain interval in the vertical direction from the vicinity of the upper end to the vicinity of the lower end, the tip and the end of the bracket are connected by a fold line, the cut is folded outward, and a plurality of blades are provided, Since the blade plate is erected so as to be fixed by the trunk ridge, a paper container having a further heat insulating effect can be obtained.
[0016]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the present invention will be described in detail by way of examples.
For example, as shown in FIG. 1, the heat insulating paper container of the present invention includes a body 11 and a bottom 12, and the body 11 of the paper cup main body 10 having a lip 13 with the periphery of the opening curled outward is insulated. This is a heat insulating paper container 1 to which a material 20 is fixed.
[0017]
Alternatively, as shown in FIGS. 2A and 2B, the body portion 11 of the paper cup body 10 having the body portion 11 and the bottom portion 12 and having the lip portion 13 whose outer periphery is curled outwardly is provided at substantially equal intervals. Are provided with a plurality of longitudinal intermittent ridges 14, 14,..., And the ridge 14 and the cylinder 30 are attached to the body 11 by covering the body 11 with the sleeve-like cylinder 30. It is the heat insulating paper container 2 which provided the heat insulation space layer 35 between parts other than a strip | line and a cylinder.
[0018]
The paper cup body 10 has a body member that forms the body part and a bottom member that forms the bottom part, and a low-density polyethylene resin (LDPE) 20 to 20% on one or both sides of a cup base paper having a basis weight of about 170 to 310 g / m ^2. It can be produced using a general paper cup molding machine using polyethylene processed paper coated by a melt extrusion method of about 40 μm.
[0019]
The plurality of intermittent line-shaped ridges 14, 14,... Provided in the body 11 correspond to a one-dot chain line, a two-dot chain line, and the like. The one-dot chain line and the two-dot chain line are not limited to a single one, and one-dot chain line and two-dot chain line may be mixed.
The convex width is about 0.5 to 6 mm, preferably 2 to 3 mm, the height is about 0.1 to 2 mm, preferably 0.2 to 0.5 mm, and the length of the discontinuous portion is 0.5 mm. About 20 mm, preferably 1 to 10 mm is preferable in terms of preventing the generation of pinholes during ridge processing.
[0020]
The reason why the ridges are provided in an intermittent line is that not only in the vertical direction but also in the horizontal direction, by providing a heat insulating space layer, the air flow can be changed not only in the vertical direction but also in various directions, This is because air can be sufficiently exchanged between the paper cup main body and the heat insulating space layer between the cylinders and the heat insulating effect can be enhanced.
[0021]
As the heat insulating material 20, considering the viewpoint of easy disposal and easy combustibility, a pulp mold raw material 21, a paper string 22 attached in a knitted pattern, and the like can be preferably used.
[0022]
The pulp mold raw material 21 is obtained by dissolving waste paper into a liquid state, and this may be sprayed to the body portion 11 to an appropriate thickness, dried and fixed.
[0023]
An appropriate amount of the pulp mold raw material applied (applied thickness) is about 100 to 300 g / m ² (thickness: 0.5 to 1 mm). When it becomes larger than this, it becomes brittle and easily peels off from the body of the paper cup body.
[0024]
It is processed into a paper string using a paper thread material, a paper string material, tissue paper, and the like.
The thickness is about 0.1 to 1 mm, and this is processed by a method such as machine knitting to form a knitted pattern, which is attached to the body of the paper cup body, thereby forming a paper string 22 attached in a knitted pattern. Alternatively, the paper cup body is fixed to a rotating shaft, the tip of the paper string is attached to the body of the paper cup body, the paper cup body is rotated, and simultaneously the paper string is moved up and down while the paper string is moved to the body of the paper cup body. When affixed to the part, a paper string 22 affixed in a stitch shape is formed (see FIG. 5).
[0025]
The heat insulation space layer 35 can be reliably provided between the paper cup main body 10 and the cylindrical body 30 by sticking the paper string 22 to the trunk portion in a stitch shape.
[0026]
The cylindrical body 30 is a paper sheet having a substantially fan-shaped shape that covers a paper cup body using a paperboard such as a white liner having a basis weight of about 80 to 120 g / m ² , a coated ball, a bleached craft, and an ivory. Is made into a sleeve shape.
Note that a substantially fan-shaped paper sheet may be wound around and adhered to the body of the paper cup body.
[0027]
In addition, the size (height) of the cylinder 30 may be a size that covers the entire body part from the top to the bottom of the body part. However, generally, the upper half that is highly likely to hold the container with fingers or the like. The size may be covered.
[0028]
The cylindrical body 30 is provided with a plurality of cylindrical ridges 31, 31,... Projecting inwardly, and the cylindrical body is in contact with the convex portions of the dotted line-shaped ridges 14 provided on the cylindrical section 11 of the paper cup body. It can also be set as the heat insulating paper container 3 fitted in (see FIGS. 3A and 3B).
[0029]
The width | variety of the cylindrical protrusion 31 is about 0.5-6 mm like the protrusion 14 provided in the trunk | drum of a paper cup main body, Preferably it is 2-3 mm, Height is about 0.1-2 mm, Preferably it is 0.00. It should be 2 to 0.5 mm. It is preferable from the viewpoint of preventing the occurrence of pinholes during ridge processing.
[0030]
Further, the cylindrical blank sheet 30a is provided with a vertical bracket-like notch m at an interval corresponding to the vertical intermittent linear ridges provided in the body portion from the vicinity of the upper end to the vicinity of the lower end. The front end and the end are connected by a folding line n, and a plurality of blades 32, 32,...
Then, a blank sheet 30a provided with a plurality of blades 32, 32,... Is formed into a cylindrical body and fitted into the body 11 of the paper cup body, and the plurality of blades 32, 32,. ,... Can be used as the heat insulating paper container 4 (see FIGS. 4A and 4B).
[0031]
【Example】
Examples of the present invention will be described more specifically below.
<Example 1>
First, a processed paper obtained by applying LDPE having a thickness of 20 μm on both sides of a cup base paper having a basis weight of 260 g / cm ² , and using a general paper cup molding machine, the rim part 13 whose peripheral edge of the opening is curled outwardly. A paper cup body 10 having an opening diameter of 95 mm, a bottom diameter of 65 mm, and a height of 110 mm was prepared.
[0032]
Separately, waste paper is dissolved to make a liquid, and a pulp mold raw material 21 is produced.
The produced pulp mold raw material 21 was applied to the entire surface of the body 11 of the paper cup main body 10 produced previously by a spraying method, and dried and fixed to obtain a heat insulating paper container 1 of Example 1 (see FIG. 1). The coating amount was 150 g / m ² .
[0033]
<Example 2>
The heat insulating paper container 5 of Example 2 was produced by the same material and method as Example 1 except having used the stitch-shaped paper string 22 as a heat insulating material fixed to the trunk | drum of a paper cup main body (refer FIG. 5).
The knitted paper string 22 is a knitted paper knitted into a knitted paper made of a paper string base paper.
[0034]
<Example 3>
First, a processed paper in which LDPE having a thickness of 20 μm was applied to both sides of a cup base paper having a basis weight of 260 g / cm ² was prepared.
The processed paper is punched out to form a body member blank having a fan shape of a predetermined size constituting the body portion 11 of the paper cup main body, and at a predetermined interval radially along the fan shape, with a width of 5 mm and a height of 1. 5 mm, length of chain part; 10 mm, distance between chain part and point part; 10 mm, length of point part; multiple ridges 14 consisting of one-dot chain line of 3 mm, excluding upper and lower end edges of body member blank It was provided in the whole part.
[0035]
Using a general paper cup molding machine from a body member blank provided with ridges 14 and a roll for bottom member separately prepared from the processed paper, an opening diameter: 95 mm, bottom diameter: 65 mm, height: 110 mm A paper cup main body 10 having a lip portion 13 and protruding ridges 14 protruding outward was produced.
[0036]
Separately, using a coated ball having a basis weight of 120 g / cm ² , it was punched out into a substantially fan-shaped blank sheet having a predetermined size, and the edges were overlapped and adhered to form a sleeve-shaped cylinder 30.
[0037]
Finally, an ethylene / vinyl acetate resin emulsion adhesive is applied to the convex portion 14 of the body portion of the paper cup body, and a sleeve-like cylindrical body 30 is placed over the sleeve portion. It was set as the heat insulating paper container 2 of Example 3 which has the heat insulation space layer 35 between a part other than and a cylinder (refer FIG. 2 (a), (b)).
[0038]
<Example 4>
Example 3 except that a plurality of annular ridges 31 having a width of 5 mm and a height of 2 mm are provided in the circumferential direction at substantially equal intervals on the substantially fan-shaped blank sheet used as the cylindrical body 30 used in Example 3. In the same manner as in Example 3 using the same paper cup body as in Example 3, when a sleeve-shaped cylinder is put on the body of the paper cup body, the cylinder adheres to the body, and the ridges and cylinders of the body It was set as the heat insulating paper container 3 of Example 4 which the protrusion of the body contacted (refer Fig.3 (a), (b)).
[0039]
<Example 5>
First, in the substantially fan-shaped blank sheet 30a used as the cylindrical body 30 used in Example 3, the vertical brackets provided in the body portion from the vicinity of the upper end to the vicinity of the lower end as shown in FIG. The notch m was provided, the tip and end of the parenthesis were connected by a fold line n, and the convex portion generated by the notch was folded outward to provide a plurality of blades 32, 32,.
[0040]
A blank sheet 30a provided with a plurality of blades 32, 32,... Is formed into a cylindrical body and fitted into the body of the paper cup body similar to the paper cup body used in Example 3, and is an ethylene / vinyl acetate resin emulsion type. A plurality of blades 32, 32,... Are fixed by a plurality of ridges 14, 14,... To form a heat insulating paper container 4 of Example 5 (FIG. 4A). ) And (b)).
[0041]
In order to evaluate the heat insulation effect of the five types of heat-insulating paper containers thus prepared, instant noodles were put in each container, hot water was poured into the container, left for 3 minutes, and then the body of the container was held with fingers. Any container could be easily held by hand.
[0042]
【The invention's effect】
As described above, the heat insulating paper container of the present invention is relatively inexpensive because of the configuration in which the heat insulating material is fixed to the body portion of the paper cup body. In addition, since it is entirely made of paper products, it is a paper container suitable for environmental problems and can be easily discarded and incinerated.
Moreover, when the blade is provided on the cylindrical body, when the body portion of the container is gripped with fingers or the like, it becomes difficult to slip and the handling property of the container is improved.
[Brief description of the drawings]
FIG. 1 is an explanatory view with a part cut away of an embodiment of a heat insulating paper container of the present invention.
FIG. 2 shows another embodiment of the heat insulating paper container of the present invention, (a) is an explanatory view with a part cut away, and (b) is a cross-sectional view taken along line AA ′ of (a). It is explanatory drawing.
FIGS. 3A and 3B show still another embodiment of the heat insulating paper container of the present invention, FIG. 3A is an explanatory view with a part cut away, and FIG. 3B is a perspective explanatory view.
4A and 4B show still another embodiment of the heat insulating paper container of the present invention, in which FIG. 4A is a perspective explanatory view, and FIG. 4B is an explanatory view of a cylindrical blank sheet used in FIG. is there.
FIG. 5 is a perspective explanatory view showing still another embodiment of the heat insulating paper container of the present invention.
[Explanation of symbols]
1, 2, 3, 4, 5, ... heat insulating paper container 10 ... paper cup body 11 ... barrel 12 ... bottom 13 ... mouth edge 14 ... ridge 20 ... heat insulation 21 ... pulp mold Raw material 22 ... Paper string 30 affixed in a knitted pattern ... Cylindrical body 30a ... Blank sheet 31 ... ridge 32 ... vane plate 35 ... heat insulation space layer m ... notch n ... bend line

Claims

A heat insulating material made of a pulp mold raw material was fixed at a coating amount of 100 to 300 g / m ² on a body portion of a paper cup body having a body portion and a bottom portion, and having an opening edge curled outward. Insulating paper container.

Consists of a body portion and a bottom portion, the body of the paper cup body having a rim with an opening peripheral edge is curled outwardly, the vertical dashed line form a plurality of projections provided, on the body portion at approximately equal intervals The sleeve-shaped cylinder to be covered is provided with a plurality of cylindrical ridges that project inwardly and that come into contact with the convex portions of the intermittent line-shaped ridge provided on the trunk of the paper cup body, and the cylinder is disposed on the trunk. A heat-insulating paper container, characterized in that it covers and sticks the convex portions of the ridges and the cylinder, and provides a heat insulating space layer between the portion other than the ridges and the cylinder.

The heat insulating paper container according to claim 2, wherein the plurality of cylindrical protrusions provided in the cylindrical body are each provided in an annular shape.

Consists of a body portion and a bottom portion, the body of the paper cup body having a rim with an opening peripheral edge is curled outwardly, the vertical dashed line form a plurality of projections provided, on the body portion at approximately equal intervals A sleeve-like cylindrical body is provided with brace-shaped cuts at regular intervals in the vertical direction from the vicinity of the upper end to the vicinity of the lower end, the tip and end of the parenthesis are connected by a folding line, the cuts are folded outward, and a plurality of blade plates are attached. Provided, standing up so that the slats are fixed by the trunk ridges, covering the barrel with the cylindrical body, and sticking the convex parts of the ridges and the cylindrical body; A heat insulating paper container, characterized in that a heat insulating space layer is provided between the cylindrical body.