JPS6132140B2 - - Google Patents
Info
- Publication number
- JPS6132140B2 JPS6132140B2 JP56130141A JP13014181A JPS6132140B2 JP S6132140 B2 JPS6132140 B2 JP S6132140B2 JP 56130141 A JP56130141 A JP 56130141A JP 13014181 A JP13014181 A JP 13014181A JP S6132140 B2 JPS6132140 B2 JP S6132140B2
- Authority
- JP
- Japan
- Prior art keywords
- molded product
- sheet
- container
- molded
- flange
- 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.)
- Expired
Links
- 238000000034 method Methods 0.000 claims description 15
- 238000000465 moulding Methods 0.000 claims description 11
- -1 polypropylene Polymers 0.000 claims description 10
- 239000002131 composite material Substances 0.000 claims description 9
- 238000004519 manufacturing process Methods 0.000 claims description 9
- 239000004743 Polypropylene Substances 0.000 claims description 8
- 229920001155 polypropylene Polymers 0.000 claims description 8
- 229920005989 resin Polymers 0.000 claims description 7
- 239000011347 resin Substances 0.000 claims description 7
- 229920001169 thermoplastic Polymers 0.000 claims description 4
- 238000003825 pressing Methods 0.000 claims description 3
- 238000005096 rolling process Methods 0.000 claims description 2
- 239000000047 product Substances 0.000 description 98
- 239000010410 layer Substances 0.000 description 56
- 239000000123 paper Substances 0.000 description 30
- 239000007789 gas Substances 0.000 description 15
- 239000004033 plastic Substances 0.000 description 15
- 229920003023 plastic Polymers 0.000 description 15
- 230000004888 barrier function Effects 0.000 description 13
- 229910052782 aluminium Inorganic materials 0.000 description 8
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 8
- 239000002985 plastic film Substances 0.000 description 8
- 238000007789 sealing Methods 0.000 description 7
- 230000003014 reinforcing effect Effects 0.000 description 6
- 238000009835 boiling Methods 0.000 description 4
- 235000013305 food Nutrition 0.000 description 4
- 239000002650 laminated plastic Substances 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 229920006255 plastic film Polymers 0.000 description 4
- 238000004026 adhesive bonding Methods 0.000 description 3
- 239000011888 foil Substances 0.000 description 3
- 239000007790 solid phase Substances 0.000 description 3
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000037303 wrinkles Effects 0.000 description 2
- OEPOKWHJYJXUGD-UHFFFAOYSA-N 2-(3-phenylmethoxyphenyl)-1,3-thiazole-4-carbaldehyde Chemical compound O=CC1=CSC(C=2C=C(OCC=3C=CC=CC=3)C=CC=2)=N1 OEPOKWHJYJXUGD-UHFFFAOYSA-N 0.000 description 1
- 239000004952 Polyamide Substances 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- 230000006750 UV protection Effects 0.000 description 1
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 235000013361 beverage Nutrition 0.000 description 1
- 235000014171 carbonated beverage Nutrition 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000005038 ethylene vinyl acetate Substances 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 239000002651 laminated plastic film Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 235000021056 liquid food Nutrition 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000011101 paper laminate Substances 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 239000005020 polyethylene terephthalate Substances 0.000 description 1
- 229920000139 polyethylene terephthalate Polymers 0.000 description 1
- 238000004826 seaming Methods 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 230000001954 sterilising effect Effects 0.000 description 1
- 238000004659 sterilization and disinfection Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Landscapes
- Details Of Rigid Or Semi-Rigid Containers (AREA)
- Laminated Bodies (AREA)
Description
【発明の詳細な説明】
本発明は食品等の充填に適したカツプ状の紙−
プラスチツク複合容器の製造方法に関する。[Detailed Description of the Invention] The present invention is a cup-shaped paper suitable for filling foods, etc.
The present invention relates to a method for manufacturing a plastic composite container.
従来紙−プラスチツク複合容器は、紙の長所で
ある印刷性の良さ、腰の強さ、紫外線防止性、易
処理性等とプラスチツクの長所である防水性、防
湿性、ガスバリア性、強靭性、加工性等とを組合
わせた容器として広く用いられている。 Conventional paper-plastic composite containers combine the advantages of paper, such as good printability, stiffness, UV protection, and ease of processing, with the advantages of plastic, such as waterproofness, moisture resistance, gas barrier properties, toughness, and processability. It is widely used as a container that combines gender, etc.
従来の紙−プラスチツク複合容器は、紙とプラ
スチツクフイルムとの積層紙を紙カツプと同じ加
工工程でカツプ状に成形したものが主である。こ
の容器は紙の欠点である防水、防湿性の不足をプ
ラスチツクフイルムで補うものであるが、積層紙
を巻いて重なり合つた二辺を接着して筒状にして
おき、これに底部を嵌込んで、接着と折曲げ加工
でカツプを成形する為、完全な防水、防湿性を望
むことは出来ない。 Conventional paper-plastic composite containers are mainly made by forming a laminated paper of paper and plastic film into a cup shape using the same processing process as a paper cup. This container uses plastic film to compensate for the lack of waterproof and moisture-proof properties that paper has, but it is made by rolling a layer of paper and gluing the two overlapping sides together to form a cylinder, and then fitting the bottom into this. Since the cup is formed by gluing and bending, it is not possible to expect complete waterproofness or moisture resistance.
最近、あらかじめ成形した紙カツプの内面にプ
ラスチツクのカツプを熱成形し、フランジ部を折
曲げ加工して紙カツプとプラスチツクカツプとを
一体化する成形法が開発されている。この容器は
防水、防湿性が著しく優れているが、紙カツプを
成形した後、この内面にプラスチツクカツプを成
形する為、容器の製造工程が複雑化するという欠
点がある。 Recently, a molding method has been developed in which a plastic cup is thermoformed on the inner surface of a preformed paper cup, and the flange portion is bent to integrate the paper cup and the plastic cup. Although this container has excellent waterproof and moisture-proof properties, it has the disadvantage that the manufacturing process for the container is complicated because a plastic cup is molded on the inner surface of the paper cup after the paper cup is molded.
このような現状に鑑み、紙容器の長所とプラス
チツク容器の長所とを兼備し、しかも低価格で大
量生産の可能な紙−プラスチツク複合容器を得ん
として種々検討の結果、プラスチツクシートから
成形した深さ対口径の比が著しく深いカツプ状の
薄肉中空凹状成形品と紙筒との組合せによつて、
低価格で、かつ紙とプラスチツクとの長所を兼備
した容器が得られることを見出し、先に開口端に
フランジ部を有し、深さ対口径の比が2.0以上
で、側壁の平均肉厚が0.3mm以下のプラスチツク
製薄肉中空凹状成形品の外側に、該成形品の高さ
と実質的に同等の高さを有し、肉厚が0.2mm以上
の紙筒をぴつたりと嵌込んで成ることを特徴とす
る容器を提案した（実用新案登録願昭55−53215
号）。 In view of this current situation, we have conducted various studies in an effort to create a paper-plastic composite container that combines the advantages of paper containers and plastic containers, and can be mass-produced at a low price. By combining a cup-shaped thin-walled hollow concave molded product with an extremely deep diameter-to-diameter ratio and a paper tube,
It was discovered that a container with both the advantages of paper and plastic can be obtained at a low price, and the first step is to have a flange at the open end, a depth-to-diameter ratio of 2.0 or more, and an average wall thickness of the side wall. A paper cylinder having a height substantially equivalent to the height of the molded product and a wall thickness of 0.2 mm or more is tightly fitted onto the outside of a thin-walled hollow concave molded product made of plastic of 0.3 mm or less. We proposed a container featuring
issue).
先に提案した容器は、印刷性、剛性、易焼却
性、防水性等に優れているが、容器の外面が紙で
ある為、食品充填後ボイル殺菌が出来ない、熱水
中でレトルト処理が出来ない等の欠点がある。 The container proposed earlier has excellent printability, rigidity, easy incineration, and waterproofness, but because the outer surface of the container is paper, it cannot be sterilized by boiling after filling with food, and cannot be retorted in hot water. There are drawbacks such as not being able to do so.
本発明者らは、紙容器の長所とプラスチツク容
器の長所を兼備し、しかも、ボイル殺菌、レトル
ト処理等の可能な超深絞り容器を得んとして種々
検討の結果、本発明を完成させるに至つたもので
ある。 The inventors of the present invention have completed various studies in an effort to create an ultra-deep-drawn container that combines the advantages of paper containers and plastic containers, and is also capable of boiling sterilization, retort processing, etc., and as a result has completed the present invention. It is ivy.
本発明の目的は、印刷性、剛性、易焼却性、防
水性、ガスバリア性、ヒートシール性、遮光性等
に優れ、ホツト充填、ボイル殺菌及びレトルト処
理の可能な飲料用金属缶に代替できる機能を有す
る深さ対口径の比が著しく大きい紙−プラスチツ
ク複合容器を提供することにある。 The purpose of the present invention is to have excellent printability, rigidity, easy incineration, waterproofness, gas barrier properties, heat sealability, light shielding properties, etc., and to be able to replace metal cans for beverages that can be hot filled, boiled sterilized, and retorted. An object of the present invention is to provide a paper-plastic composite container having a significantly large depth-to-diameter ratio.
本発明は、外層と内層とが熱可塑性プラスチツ
クの凹状成形品から成り、中間層がシートから成
る多層の複合容器の製造方法であつて、外層の成
形品(A)は開口端にフランジ部を有し、成形深さ対
口径の比が1.0以上であり、底部の内径と開口部
の内径とが実質的に等しい筒状の空洞部を有し、
側壁部の平均肉厚が0.2mm以下であり、該成形品
Ａの空洞部の内側に、肉厚が0.1mm以上の四辺形
のシートを巻込んで形成せしめた筒状シートを成
形品Ａの側壁部に沿つて嵌込み、該筒状シートの
内壁に沿つて成形深さが殆ど成形品(A)と同じで、
外径が成形品(A)の内径よりやゝ小さい寸法であつ
て、形状が成形品(A)と殆ど等しく、開口端にフラ
ンジ部を有し、成形深さ対口径の比が1.0以上で
あり、底部の内径と開口部の内径とが実質的に等
しい筒状の空洞部を有し、側壁部の平均肉厚が
0.2mm以下の成形品(B)がぴつたりと嵌込まれてお
り、成形品(A)のフランジ部あるいはその近傍でフ
ランジ部の全周にわたつて成形品(A)と成形品(B)と
を接着し、成形品(A)と成形品(B)との間隙をシール
して成ることを特徴としている。 The present invention is a method for manufacturing a multilayer composite container in which the outer layer and the inner layer are made of thermoplastic plastic concave molded products, and the middle layer is made of a sheet, wherein the outer layer molded product (A) has a flange portion at the open end. having a cylindrical cavity having a molding depth to diameter ratio of 1.0 or more, and having an inner diameter of the bottom and an inner diameter of the opening substantially equal;
The average wall thickness of the side wall portion is 0.2 mm or less, and a cylindrical sheet is formed by wrapping a quadrilateral sheet with a wall thickness of 0.1 mm or more inside the cavity of the molded product A. The molding depth is almost the same as molded product (A) along the inner wall of the cylindrical sheet.
The outer diameter is slightly smaller than the inner diameter of the molded product (A), the shape is almost the same as the molded product (A), the opening end has a flange, and the molding depth to diameter ratio is 1.0 or more. It has a cylindrical cavity in which the inner diameter of the bottom and the inner diameter of the opening are substantially equal, and the average wall thickness of the side wall is
The molded product (B) with a diameter of 0.2 mm or less is tightly fitted, and the molded product (A) and molded product (B) are tightly fitted together at or near the flange of the molded product (A) over the entire circumference of the flange. The molded product (A) and the molded product (B) are bonded together to seal the gap between the molded products (A) and (B).
本発明を図面によつて詳しく説明する。 The present invention will be explained in detail with reference to the drawings.
第１図に本発明による容器の一例を示す。図
中、１はフランジ部、２は空洞部、３は底部、４
は筒状シートの合わせ目を示す。 FIG. 1 shows an example of a container according to the present invention. In the figure, 1 is the flange part, 2 is the cavity part, 3 is the bottom part, 4
indicates the seam of the cylindrical sheet.
第２図には本発明による容器の一例を断面図で
示す。図中、５は外層の成形品(A)であり、５−１
はフランジ部、５−２は空洞部、５−３は底部を
示す。６は中間層の筒状シートであり、７は内層
の成形品(B)であり、７−１はフランジ部、７−２
は空洞部、７−３は底部であり、８はシール部分
を示す。 FIG. 2 shows a cross-sectional view of an example of a container according to the invention. In the figure, 5 is the outer layer molded product (A), and 5-1
5-2 is a flange portion, 5-2 is a hollow portion, and 5-3 is a bottom portion. 6 is the cylindrical sheet of the intermediate layer, 7 is the molded product (B) of the inner layer, 7-1 is the flange part, 7-2
7-3 is a hollow part, 7-3 is a bottom part, and 8 is a seal part.
外層の成形品５の空洞部５−２の内壁に沿つて
筒状シート６を嵌込み、さらにその内壁に沿つて
内層の成形品７を嵌込み、外層の成形品５のフラ
ンジ部５−１の上面と内層の成形品７のフランジ
部７−１の下面とをフランジ部の全周にわたつて
接着して、成形品５と形成品７との間隙をシール
してある。 The cylindrical sheet 6 is fitted along the inner wall of the cavity 5-2 of the outer layer molded product 5, and the inner layer molded product 7 is further fitted along the inner wall, and the flange portion 5-1 of the outer layer molded product 5 is fitted. The upper surface and the lower surface of the flange portion 7-1 of the molded product 7 of the inner layer are bonded over the entire circumference of the flange portion to seal the gap between the molded product 5 and the molded product 7.
第３図には本発明による容器の第二の例を断面
図で示す。図中、９は二つの成形品の底部の間隙
に嵌込まれた中間層の平らなシートである。第２
の例とはこのシート９の有無だけが異なつてい
る。 FIG. 3 shows a second example of a container according to the invention in cross-section. In the figure, 9 is a flat sheet of an intermediate layer fitted into the gap between the bottoms of the two molded parts. Second
The only difference from the example is the presence or absence of this sheet 9.
本発明の複合容器の製造に際しては、外層の成
形品(A)をこの成形品(A)よりやゝ小さい寸法の空洞
部を有する雌型の内部へぴつたりと嵌込み、次い
で筒状シートを成形品(A)の内壁に沿つて嵌込み、
さらに筒状シートの内側に内層の成形品(B)をぴつ
たりと嵌込み、次いで成形品(B)の空洞部の内面を
加圧しながら外層の成形品(A)のフランジ部上面と
内層の成形品(B)のフランジ部下面とをフランジ部
の全周にわたつて押圧して接着する。 When manufacturing the composite container of the present invention, the outer layer molded product (A) is tightly fitted into a female mold having a cavity slightly smaller in size than the molded product (A), and then the cylindrical sheet is inserted. Fit along the inner wall of the molded product (A),
Furthermore, the inner layer molded product (B) is tightly fitted inside the cylindrical sheet, and then, while applying pressure to the inner surface of the cavity of the molded product (B), the upper surface of the flange part of the outer layer molded product (A) and the inner layer Press and adhere the lower surface of the flange of the molded product (B) over the entire circumference of the flange.
成形品を雌型の内部へ嵌込むのは、成形品(A)と
成形品(B)との間隙を成形品(B)の内側から加圧して
間隙を脱気する為である。加圧の方法は特に限定
しないが、圧空で加圧する方法、成形品(B)の空洞
部内に雄型を挿入し雄雌型の組合せで成形品の間
隙を加圧する方法、あるいはこれらを併用する方
法が好ましい。 The purpose of fitting the molded product into the female mold is to pressurize the gap between the molded product (A) and molded product (B) from the inside of the molded product (B) to evacuate the gap. The method of pressurization is not particularly limited, but a method of pressurizing with compressed air, a method of inserting a male mold into the cavity of the molded product (B) and pressurizing the gap between the molded products with a combination of male and female molds, or a combination of these methods is used. The method is preferred.
成形品(A)と成形品(B)との間隙を脱気してシール
することにより、中間層のシートと成形品との密
着性が改善される。成形品(A)及び成形品(B)はいず
れも側壁部が薄肉である為、容器の状態で側壁部
に皺が寄りやすいが、成形品の間の隙間を脱気し
てシールすることにより、成形品と中間層の筒状
シートとの密着性が改善され、側壁部の皺が生じ
にくくなる。 By deaerating and sealing the gap between the molded product (A) and the molded product (B), the adhesion between the intermediate layer sheet and the molded product is improved. Molded product (A) and molded product (B) both have thin side walls, so the side walls tend to wrinkle when they are in containers, but by deaerating and sealing the gaps between the molded products, , the adhesion between the molded product and the cylindrical sheet of the intermediate layer is improved, and wrinkles are less likely to occur on the side wall.
成形品(A)と成形品(B)との間隙に空気が残つてい
ると、容器に食品を充填してレトルト処理した際
に、その空気が膨張して容器が変形したり、フラ
ンジ部のシールが剥れたりする場合がある。 If air remains in the gap between molded product (A) and molded product (B), when the container is filled with food and retorted, the air may expand and cause the container to deform, or the flange may The sticker may peel off.
フランジ部を押圧して接着し、成形品(A)と成形
品(B)との間隙をシールする方法は特に限定しない
が、ヒートシールの可能な成形品の場合、フラン
ジ部を加熱してシールする。 There are no particular restrictions on the method of pressing the flange parts to bond them and sealing the gap between the molded products (A) and molded parts (B), but if the molded product can be heat-sealed, the flange parts can be heated and sealed. do.
第４図には、本発明による容器の製造工程の一
例を示す。図中、１０は雌型、１１は外層成形
品、１２は筒状シート、１３は内層成形品、１４
は雄型、１５は圧空供給口、１６はフランジ部、
１７はシール用ヒーター、１８は容器を示す。ま
ず、ａのよに雌型１０の中へ外層成形品１１をぴ
つたりと嵌込み、次にｂのようにその中へ筒状シ
ート１２を嵌込み、さらにｃのように内層成形品
１３を筒状シート１２の内側へ嵌込む。次にｄ，
ｅに示したように、雄型１４を空洞部内へ挿入し
た後、圧空供給口１５から空洞部内へ圧空を供給
して、成形品の壁を加圧しながらフランジ部１６
上へシール用ヒーター１７を下ろし、押圧しなが
らフランジ部１６をヒートシールする。形成品の
間隙が脱気され、フランジ部のヒートシールされ
た容器１８はｆのように雌型から取出す。 FIG. 4 shows an example of a manufacturing process for a container according to the present invention. In the figure, 10 is a female mold, 11 is an outer layer molded product, 12 is a cylindrical sheet, 13 is an inner layer molded product, and 14
is a male type, 15 is a compressed air supply port, 16 is a flange part,
17 is a sealing heater, and 18 is a container. First, the outer layer molded product 11 is tightly fitted into the female mold 10 as shown in a, then the cylindrical sheet 12 is fitted therein as shown in b, and then the inner layer molded product 13 is fitted as shown in c. It is fitted inside the cylindrical sheet 12. Then d,
As shown in e, after inserting the male mold 14 into the cavity, compressed air is supplied into the cavity from the compressed air supply port 15, and the flange part 16 is pressed while pressurizing the wall of the molded product.
The sealing heater 17 is lowered upward, and the flange portion 16 is heat-sealed while being pressed. The gap between the formed parts is evacuated, and the container 18 with its flange portion heat-sealed is removed from the female mold as shown in f.
熱可塑性プラスチツクの凹状成形品の材質は限
定しないが、ポリプロピレン、ポリエチレン、ポ
リエチレンテレフタレート、ポリアミド、塩化ビ
ニル樹脂、スチロール樹脂等の単層あるいは多層
シートから製造された薄肉成形品が好ましい。特
にポリプロピレンシートからプラグを補助に用い
て固相圧空成形法により製造した凹状成形品は単
体では100℃以上に加熱すると収縮変形を起しや
すいが、本発明による複合容器に使用すると、中
間層のシートの存在によつて収縮変形が抑制さ
れ、耐熱性が向上し、レトルト処理が可能とな
る。 The material of the thermoplastic plastic concave molded product is not limited, but a thin-walled molded product made from a single layer or multilayer sheet of polypropylene, polyethylene, polyethylene terephthalate, polyamide, vinyl chloride resin, styrene resin, etc. is preferable. In particular, a concave molded product manufactured from a polypropylene sheet by solid-state air pressure forming using a plug as an aid tends to shrink and deform when heated to over 100°C, but when used in a composite container according to the present invention, the intermediate layer The presence of the sheet suppresses shrinkage and deformation, improves heat resistance, and enables retort processing.
中間層のシートの材質は紙、紙とアルミ箔との
ラミネート、プラスチツクシート、プラスチツク
シートとアルミ箔とのラミネート等であり、特に
紙シートが好ましい。シートの表面には粘着剤、
接着剤等を塗布して成形品表面との密着性を向上
させるものも好ましい。 The material of the intermediate layer sheet may be paper, a laminate of paper and aluminum foil, a plastic sheet, a laminate of a plastic sheet and aluminum foil, etc., with paper sheets being particularly preferred. Adhesive on the surface of the sheet,
It is also preferable to apply an adhesive or the like to improve the adhesion to the surface of the molded product.
容器のフランジ部の形状は特に限定しないが、
蓋としてプラスチツクフイルム、アルミ−プラス
チツクラミネート、紙−プラスチツクラミネート
等をフランジ部上に載せてヒートシールする為に
は、上面の平らなフランジ部が望ましい。フラン
ジ部上にアルミ等の金属製の蓋を被せて金属缶と
同様に巻締め加工を行なつても良い。 The shape of the flange of the container is not particularly limited, but
In order to place plastic film, aluminum-plastic laminate, paper-plastic laminate, etc. on the flange portion as a lid and heat seal it, a flange portion with a flat upper surface is desirable. A lid made of metal such as aluminum may be placed over the flange portion, and seaming may be performed in the same manner as for metal cans.
成形品(A)及び(B)の成形深さ対口径の比は1.0以
上であり、特にこの比が1.5以上の超深絞り成形
品が好ましい。底部の内径と開口部の内径とが実
質的に等しい筒状の空洞部を有し、側壁部の平均
肉厚が0.2mm以下の成形品で成形深さ対口径の比
が1.0以上の場合、成形品の側壁部が著しく曲り
やすくなる。このような腰の弱い容器の側壁部に
平行して0.1mm以上の肉厚を有する筒状のシート
を嵌込むと、容器の側壁部がかなり補強される。
成形深さ対口径の比が1.0未満の成形品に対して
は必ずしも筒状シートによる補強効果は目立たな
いが、成形深さ対口径の比が1.5以上の成形品に
対しては筒状シートの補強効果が顕著になる。 The molded products (A) and (B) have a molding depth to diameter ratio of 1.0 or more, and ultra-deep drawing molded products with this ratio of 1.5 or more are particularly preferred. If the molded product has a cylindrical cavity in which the inner diameter of the bottom and the inner diameter of the opening are substantially equal, the average wall thickness of the side wall is 0.2 mm or less, and the molding depth to diameter ratio is 1.0 or more, The side wall of the molded product becomes extremely bendable. If a cylindrical sheet having a wall thickness of 0.1 mm or more is fitted in parallel to the side wall of such a weak container, the side wall of the container will be considerably reinforced.
For molded products with a molding depth to diameter ratio of less than 1.0, the reinforcing effect of the cylindrical sheet is not necessarily noticeable, but for molded products with a molding depth to diameter ratio of 1.5 or more, the reinforcing effect of the cylindrical sheet is The reinforcing effect becomes noticeable.
成形品の平均肉厚が0.2mm以上では成形品の腰
が強くなるので、中間層の筒状シートは不必要で
ある。底部の内径と開口部の内径とが実質的に等
しいストレートの成形品に対しては中間層の筒状
シートの挿入は容易であり、補強効果も顕著であ
る。ストレートの成形品の場合、中間層は長方形
のシートを巻込んで筒状にして成形品の中へ嵌込
むだけでよい。 If the average wall thickness of the molded product is 0.2 mm or more, the molded product becomes stiff, so the cylindrical sheet as the intermediate layer is unnecessary. For a straight molded product in which the inner diameter of the bottom and the inner diameter of the opening are substantially equal, it is easy to insert the intermediate cylindrical sheet, and the reinforcing effect is significant. In the case of a straight molded product, the intermediate layer can be simply rolled up from a rectangular sheet to form a cylinder and fit into the molded product.
シートの厚みは0.1mm以上である。シートの厚
みが0.1mm未満では補強効果が不十分であり、容
器の腰が弱くなる。中間層に紙製シートを嵌込む
場合、紙の厚みは0.2mm乃至1.0mmの範囲内にある
ことが好ましい。中間層にプラスチツクシートを
使用する場合、プラスチツクシートの厚みは0.1
mm乃至0.3mmの範囲内であることが好ましい。 The thickness of the sheet is 0.1 mm or more. If the thickness of the sheet is less than 0.1 mm, the reinforcing effect will be insufficient and the container will become stiff. When a paper sheet is inserted into the intermediate layer, the thickness of the paper is preferably within the range of 0.2 mm to 1.0 mm. When using a plastic sheet for the middle layer, the thickness of the plastic sheet is 0.1
It is preferably within the range of mm to 0.3 mm.
シートは横の辺を縦の辺に平行な中心軸のまわ
りに巻込んで筒状シートを形成せしめて外層の成
形品(A)の内壁に沿つて嵌込む。シートを筒状にす
るには、シートをシリンダー状の型の周囲に巻付
けて筒状に成形するのが良い。容器の補強効果を
高める為、筒状シートに合わせ目は接着しておく
ことが好ましい。外層の成形品(A)の内壁に沿つて
筒状シートを嵌込み、その内側に成形品(B)を嵌込
んだ後、成形品(A)と成形品(B)とのフランジ部ある
いはその近傍でフランジ部の全周にわたつて接着
して二つの成形品の間隙を完全にシールし容器を
形成する。 The horizontal sides of the sheet are rolled around a central axis parallel to the vertical sides to form a cylindrical sheet, which is fitted along the inner wall of the outer layer molded product (A). To make a sheet into a cylinder, it is best to wrap the sheet around a cylindrical mold and form it into a cylinder. In order to enhance the reinforcing effect of the container, it is preferable to glue the seams of the cylindrical sheet. After fitting a cylindrical sheet along the inner wall of the outer layer molded product (A) and fitting the molded product (B) inside it, the flange part of the molded product (A) and molded product (B) or the Adhesion is applied around the entire periphery of the flange portion in the vicinity to completely seal the gap between the two molded products and form a container.
中間層のシートとして紙を使用した本発明によ
る容器は、腰が強く、印刷が容易であり、遮光
性、易焼却性に優れている。これらは紙を中間層
に使用したことによる効果である。本容器は内層
及び外層がプラスチツク成形品であり、それらの
間隙がフランジ部でシールされている為、防水性
があり、液体の充填ができる上、沸騰水の中でボ
イル殺菌すること及び熱水の中でレトルト処理す
ることが出来る。 The container according to the present invention using paper as the intermediate layer sheet is strong, easy to print on, and has excellent light-shielding properties and easy incineration. These effects are due to the use of paper for the intermediate layer. The inner and outer layers of this container are made of plastic molded products, and the gap between them is sealed with a flange, so it is waterproof and can be filled with liquid, and can be sterilized by boiling in boiling water. Retort processing can be performed inside the container.
本発明によるガスバリア性を付与させることは
容易である。その一つの方法は塩化ビニリデン樹
脂あるいはエチレン−醋酸ビニル共重合体樹脂け
ん化物等の高ガスバリア性樹脂の層を含んだ多層
のシートから内層又は外層の成形品を熱成形し
て、これらの成形品を使つて容器を組立てるもの
である。もう一つの方法は紙あるいはプラスチツ
クシートにアルミ箔又は高ガスバリア性樹脂フイ
ルムをラミネーシヨンして、これらのシートを中
間層に使用するものである。ガスバリア性を高め
る為、容器の底部にも全面にガスバリア性シート
を中間層として挿入するのが好ましい。高いガス
バリア性のシートを中間層に使用して容器のガス
バリア性を高める為には、中間層のシートの辺縁
部を成形品(A)及び成形品(B)の壁面に接着するか、
あるいはシートを全面にわたつて成形品(A)及び成
形品(B)に接着させるのが好ましい。中間層の高ガ
スバリア性シートを成形品(A)及び成形品(B)の壁に
接着すれば、成形品の壁を透過した酸素などのガ
スは層と層との間を流動してシートの継ぎ目に達
しそこから容器内部へ侵入するということがない
ので容器のガスバリア性が高められる。もし中間
層に高ガスバリア性シートを使用しても、このシ
ートを成形品に全く接着していないと、例えば外
部から成形品(A)の壁を透過して中間層のシートの
表面に到達したガスは成形品(A)とシートとの間隙
を流れて側壁の筒状シートと底部のシートとの継
ぎ目に到達し、ここから成形品(B)とシートとの間
隙へ流れ込み、成形品(B)の壁を通つて容器の内部
へ侵入する。その為容器として高いガスバリア性
を保つことが出来ない。 It is easy to impart gas barrier properties according to the present invention. One method is to thermoform inner or outer layer molded products from a multilayer sheet containing a layer of high gas barrier resin such as vinylidene chloride resin or saponified ethylene-vinyl acetate copolymer resin. It is used to assemble the container. Another method is to laminate aluminum foil or a high gas barrier resin film onto a paper or plastic sheet and use these sheets as the intermediate layer. In order to improve gas barrier properties, it is preferable to insert a gas barrier sheet as an intermediate layer over the entire bottom of the container. In order to improve the gas barrier properties of the container by using a sheet with high gas barrier properties as the intermediate layer, the edges of the intermediate layer sheet can be glued to the walls of the molded product (A) and the molded product (B), or
Alternatively, it is preferable to adhere the sheet to the molded article (A) and the molded article (B) over the entire surface. If the middle layer high gas barrier sheet is adhered to the walls of the molded product (A) and molded product (B), gases such as oxygen that permeate the walls of the molded product will flow between the layers and the sheets will be heated. The gas barrier properties of the container are improved because it does not reach the seam and enter the container from there. Even if a high gas barrier sheet is used for the intermediate layer, if this sheet is not adhered to the molded product at all, for example, it may pass through the wall of the molded product (A) from the outside and reach the surface of the intermediate layer sheet. The gas flows through the gap between the molded product (A) and the sheet, reaches the joint between the cylindrical sheet on the side wall and the bottom sheet, and from there flows into the gap between the molded product (B) and the sheet, forming the molded product (B). ) into the container through the wall. Therefore, it is not possible to maintain high gas barrier properties as a container.
中間層に紙あるいはポリプロピレン等のシート
を使用した本発明による容器は、加熱時の保形性
が向上する為、食品等を充填し、口部を密閉した
後、120℃で30分間程度のレトルト殺菌処理が可
能である。外層及び内層にポリプロピレンシート
を融点以下の温度に加熱してプラグアシスト圧空
成形法により成形した、いわゆる固相圧空成形品
を使用した場合でも中間層に紙を使用すると、成
形品の加熱による変形が紙の剛性によつて抑えら
れ、容器として耐熱性が向上する。従来レトルト
処理が不可能と考えられていたポリプロピレンの
固相圧空成形品も本発明のような紙との組合せに
よつて耐熱性が著しく向上し、レトルト容器とし
て使用することが出来る。超深絞り成形は出来る
が、耐熱性の低いポリプロピレンの固相圧空成形
品と、深絞り成形は出来ないが、耐熱性の高い
紙、あるいはポリプロピレンとアルミとのラミネ
ートシート等とを組合せて耐熱性の高い超深絞り
容器が出来るのが本発明の特長である。尚レトル
ト処理を効果的に行う為には、成形品(A)と成形品
(B)との間隙を加圧しながら二つの成形品のフラン
ジ部をシールして、この間隙から空気を抜いてお
くのが好ましい。 The container according to the present invention, which uses a sheet of paper or polypropylene for the intermediate layer, has improved shape retention when heated, so after filling it with food, sealing the mouth, and retorting it at 120°C for about 30 minutes. Can be sterilized. Even if a so-called solid phase air-formed product is used for the outer and inner layers, which is made by heating a polypropylene sheet to a temperature below its melting point and molding it using the plug-assisted air-forming method, if paper is used for the middle layer, the molded product will deform due to heating. This is suppressed by the rigidity of the paper, improving the heat resistance of the container. Polypropylene solid phase pressure molded products, which were previously thought to be impossible to retort, have significantly improved heat resistance when combined with paper as in the present invention, and can be used as retort containers. Heat-resistant products can be created by combining solid-phase pressure-formed polypropylene, which can be ultra-deep drawn but has low heat resistance, with paper, which cannot be deep drawn, but has high heat resistance, or a laminate sheet of polypropylene and aluminum. A feature of the present invention is that it is possible to produce ultra-deep-drawn containers with high viscosity. In order to effectively perform retort processing, molded product (A) and
It is preferable to seal the flanges of the two molded products while pressurizing the gap with (B), and remove air from this gap.
本発明による容器はフランジ部がプラスチツク
である為、内容物を充填した後、口部をプラスチ
ツクフイルム、紙／プラスチツクのラミネート、
アルミ／プラスチツクのラミネート等でヒートシ
ールすることが出来る。口部をアルミ蓋などで金
属缶と同様に巻締め加工することも出来る。 Since the flange part of the container according to the present invention is made of plastic, after filling the container with the contents, the opening part is covered with plastic film, paper/plastic laminate, etc.
Can be heat sealed with aluminum/plastic laminates, etc. The mouth can also be sealed with an aluminum lid in the same way as metal cans.
本発明による容器は側壁部が三重構造、底部が
二重乃至三重構造である為、耐衝撃性が高く、信
頼性が高い。たとえ外層の成形品が破れても、内
層の成形品によつて内容物の洩れを防止すること
ができる。中間層のシートの接合部を接着し、底
部に厚手手のシートを使用すると耐熱性が向上
し、炭酸飲料等の内圧の高い液状食品の容器とし
ても使用することが出来る。 Since the container according to the present invention has a triple layered side wall structure and a double or triple layered bottom structure, it has high impact resistance and high reliability. Even if the outer layer molded product is torn, the inner layer molded product can prevent the contents from leaking. By gluing the joints of the intermediate layer sheets and using a thick sheet at the bottom, heat resistance is improved, and the container can also be used as a container for liquid foods with high internal pressure, such as carbonated drinks.
本容器による容器は丸型い限定するものではな
く、楕円型、角型等でもよい。レトルト用、耐圧
用等の容器としては第１図の例に示したような丸
型が好ましい。 The container according to the present invention is not limited to a round shape, but may be oval, square, or the like. As a container for a retort, a pressure-resistant container, etc., a round shape as shown in the example of FIG. 1 is preferable.
使用済みの空になつた本容器は手の力で簡単に
握りつぶすことが出来るので、廃棄物として嵩張
らない。焼却が容易であるので、アルミ缶、ブリ
キ缶のように缶公害を発生させる必配もない。 The used and empty container can be easily squeezed by hand, so it does not take up much space as waste. Since it is easy to incinerate, there is no need to cause can pollution like aluminum or tin cans.
第１図は本発明による容器の一例を示す。図
中、１はフランジ部、２は空洞部、３は底部、４
は筒状シートの合わせ目を示す。
第２図は本発明による容器の一例を断面図で示
す。図中、５は外層の成形品(A)、５−１はフラン
ジ部、５−２は空洞部、５−３は底部、６は中間
層の筒状シート、７は内層の成形品(B)、７−１は
フランジ部、７−２は空洞部、７−３は底部、８
はシール部分を示す。
第３図は本発明による容器の第二の例を断面図
で示す。図中、９は二つの成形品の底部の間隙に
嵌込まれた中間層の平らなシートである。
第４図のａ〜ｆには本発明による容器の製造工
程の一例を示す。図中、１０は雌型、１１は外層
成形品、１２は筒状シート、１３は内層成形品、
１４は雄型、１５は圧空供給口、１６はフランジ
部、１７はシール用ヒーター、１８は容器を示
す。
FIG. 1 shows an example of a container according to the invention. In the figure, 1 is the flange part, 2 is the cavity part, 3 is the bottom part, 4
indicates the seam of the cylindrical sheet. FIG. 2 shows, in cross-section, an example of a container according to the invention. In the figure, 5 is the outer layer molded product (A), 5-1 is the flange part, 5-2 is the cavity part, 5-3 is the bottom part, 6 is the intermediate layer cylindrical sheet, and 7 is the inner layer molded product (B ), 7-1 is the flange part, 7-2 is the hollow part, 7-3 is the bottom part, 8
indicates the seal part. FIG. 3 shows a second example of a container according to the invention in cross-section. In the figure, 9 is a flat sheet of an intermediate layer fitted into the gap between the bottoms of the two molded parts. FIGS. 4a to 4f show an example of a manufacturing process for a container according to the present invention. In the figure, 10 is a female mold, 11 is an outer layer molded product, 12 is a cylindrical sheet, 13 is an inner layer molded product,
14 is a male mold, 15 is a compressed air supply port, 16 is a flange, 17 is a sealing heater, and 18 is a container.
Claims (1)
成形品から成り、中間層がシートから成る多層の
複合容器の製造方法において、開口端にフランジ
部を有し、成形深さ対口径の比が1.0以上であ
り、底部の内径と開口部の内径とが実質的に等し
い筒状の空洞部を有し、側壁部の平均肉厚が0.2
mm以下である成形品(A)を該成形品(A)よりやゝ大き
い寸法の空洞部を有する雌型の内部へぴつたりと
嵌込み、次いで該成形品(A)の空洞部の内側に縦の
辺の長さが該成形品の側壁部の高さに殆ど等し
く、横の辺の長さが該成形品の側壁部の周囲長さ
に殆ど等しいか、やゝ大きめの寸法であつて厚さ
が0.1mm以上の四辺形のシートから、その横の辺
を縦の辺に平行な中心軸の周りに巻込んで筒状シ
ートを形成せしめた後、該筒状シートを成形品(A)
の側壁部に沿つてぴつたりと嵌込み、さらに該筒
状シートの内側に、開口端にフランジ部を有し、
成形深さ対口径の比が1.0以上であり、底部の内
径と開口部の内径とが実質的に等しい筒状の空洞
部を有し、側壁部の平均肉厚が0.2mm以下であ
り、外径が成形品(A)の内径よりやゝ小さい寸法で
あつて、高さが成形品(A)と殆ど等しい成形品(B)を
ぴつたりと嵌込み、次いで成形品(B)の空洞部の内
面を加圧しながら外側の成形品(A)のフランジ部上
面と内側の成形品(B)のフランジ部下面とをフラン
ジ部の全周にわつて接着することを特徴とする容
器の製造方法。 ２ 外層と内層の熱可塑性プラスチツクの凹状成
形品が、ポリプロピレン樹脂のシートからプラグ
を補助に用いる圧空成形法により製造した成形品
である特許請求の範囲第１項記載の容器の製造方
法。[Scope of Claims] 1. A method for manufacturing a multilayer composite container in which the outer layer and the inner layer are made of concave molded thermoplastic plastics, and the middle layer is made of a sheet, the container having a flange portion at the opening end, It has a cylindrical cavity in which the diameter ratio is 1.0 or more, the inner diameter of the bottom and the inner diameter of the opening are substantially equal, and the average wall thickness of the side wall is 0.2.
The molded product (A), which is less than The length of the vertical side is almost equal to the height of the side wall of the molded article, and the length of the horizontal side is almost equal to or slightly larger than the circumferential length of the side wall of the molded article. A cylindrical sheet is formed from a quadrilateral sheet with a thickness of 0.1 mm or more by rolling the horizontal sides around a central axis parallel to the vertical sides, and then the cylindrical sheet is made into a molded product (A )
and further has a flange portion at the open end inside the cylindrical sheet,
The molding depth to diameter ratio is 1.0 or more, the inner diameter of the bottom and the inner diameter of the opening are substantially equal to each other, the average wall thickness of the side wall is 0.2 mm or less, and the outer diameter is 1.0 or more. A molded product (B) whose diameter is slightly smaller than the inner diameter of the molded product (A) and whose height is almost the same as that of the molded product (A) is tightly fitted into the molded product (B), and then the molded product (B) is inserted into the cavity. A method for producing a container, which comprises bonding the upper surface of the flange of the outer molded product (A) and the lower surface of the flange of the inner molded product (B) along the entire circumference of the flange while applying pressure to the inner surface of the container. . 2. The method for producing a container according to claim 1, wherein the thermoplastic plastic concave molded outer layer and inner layer are molded products manufactured from a polypropylene resin sheet by a pressure molding method using a plug as an aid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56130141A JPS5852047A (en) | 1981-08-21 | 1981-08-21 | Vessel and its manufacture |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56130141A JPS5852047A (en) | 1981-08-21 | 1981-08-21 | Vessel and its manufacture |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5852047A JPS5852047A (en) | 1983-03-28 |
| JPS6132140B2 true JPS6132140B2 (en) | 1986-07-24 |
Family
ID=15026941
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP56130141A Granted JPS5852047A (en) | 1981-08-21 | 1981-08-21 | Vessel and its manufacture |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5852047A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2593402Y2 (en) * | 1992-08-19 | 1999-04-12 | 株式会社吉野工業所 | Synthetic resin container |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5538703B2 (en) * | 1975-10-06 | 1980-10-06 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5856217Y2 (en) * | 1978-09-02 | 1983-12-24 | 住友ベークライト株式会社 | composite container |
-
1981
- 1981-08-21 JP JP56130141A patent/JPS5852047A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5538703B2 (en) * | 1975-10-06 | 1980-10-06 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5852047A (en) | 1983-03-28 |
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