JPH0631091B2 - Easy-to-open can lid that can protect the cutting edge - Google Patents
Easy-to-open can lid that can protect the cutting edgeInfo
- Publication number
- JPH0631091B2 JPH0631091B2 JP61136310A JP13631086A JPH0631091B2 JP H0631091 B2 JPH0631091 B2 JP H0631091B2 JP 61136310 A JP61136310 A JP 61136310A JP 13631086 A JP13631086 A JP 13631086A JP H0631091 B2 JPH0631091 B2 JP H0631091B2
- Authority
- JP
- Japan
- Prior art keywords
- lid
- resin
- score
- opening
- band
- 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 - Lifetime
Links
- 229920005989 resin Polymers 0.000 claims description 117
- 239000011347 resin Substances 0.000 claims description 117
- 239000011248 coating agent Substances 0.000 claims description 74
- 238000000576 coating method Methods 0.000 claims description 74
- 239000000853 adhesive Substances 0.000 claims description 27
- 230000001070 adhesive effect Effects 0.000 claims description 27
- 230000002093 peripheral effect Effects 0.000 claims description 24
- 239000003973 paint Substances 0.000 description 31
- 238000002474 experimental method Methods 0.000 description 17
- 230000007797 corrosion Effects 0.000 description 14
- 238000005260 corrosion Methods 0.000 description 14
- 239000004593 Epoxy Substances 0.000 description 13
- 150000001875 compounds Chemical class 0.000 description 13
- 229910000831 Steel Inorganic materials 0.000 description 12
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical group ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 description 12
- 239000010959 steel Substances 0.000 description 12
- 229920001944 Plastisol Polymers 0.000 description 10
- 239000004999 plastisol Substances 0.000 description 10
- 239000000463 material Substances 0.000 description 9
- 239000000203 mixture Substances 0.000 description 9
- 239000005029 tin-free steel Substances 0.000 description 9
- 239000011253 protective coating Substances 0.000 description 8
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 7
- 208000027418 Wounds and injury Diseases 0.000 description 7
- 238000000034 method Methods 0.000 description 7
- 230000000694 effects Effects 0.000 description 6
- 239000007769 metal material Substances 0.000 description 6
- 230000000704 physical effect Effects 0.000 description 6
- 238000012360 testing method Methods 0.000 description 6
- 238000011156 evaluation Methods 0.000 description 5
- 238000007789 sealing Methods 0.000 description 5
- RSWGJHLUYNHPMX-UHFFFAOYSA-N 1,4a-dimethyl-7-propan-2-yl-2,3,4,4b,5,6,10,10a-octahydrophenanthrene-1-carboxylic acid Chemical compound C12CCC(C(C)C)=CC2=CCC2C1(C)CCCC2(C)C(O)=O RSWGJHLUYNHPMX-UHFFFAOYSA-N 0.000 description 4
- 229920001577 copolymer Polymers 0.000 description 4
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- 208000014674 injury Diseases 0.000 description 4
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 4
- 239000010410 layer Substances 0.000 description 4
- 235000012424 soybean oil Nutrition 0.000 description 4
- 239000003549 soybean oil Substances 0.000 description 4
- ZWEHNKRNPOVVGH-UHFFFAOYSA-N 2-Butanone Chemical compound CCC(C)=O ZWEHNKRNPOVVGH-UHFFFAOYSA-N 0.000 description 3
- KHPCPRHQVVSZAH-HUOMCSJISA-N Rosin Natural products O(C/C=C/c1ccccc1)[C@H]1[C@H](O)[C@@H](O)[C@@H](O)[C@@H](CO)O1 KHPCPRHQVVSZAH-HUOMCSJISA-N 0.000 description 3
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 3
- 238000007796 conventional method Methods 0.000 description 3
- 239000000806 elastomer Substances 0.000 description 3
- 239000003822 epoxy resin Substances 0.000 description 3
- 230000006870 function Effects 0.000 description 3
- -1 hydroxy-propyl Chemical group 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 229920000647 polyepoxide Polymers 0.000 description 3
- 229920003048 styrene butadiene rubber Polymers 0.000 description 3
- 229920005992 thermoplastic resin Polymers 0.000 description 3
- KHPCPRHQVVSZAH-UHFFFAOYSA-N trans-cinnamyl beta-D-glucopyranoside Natural products OC1C(O)C(O)C(CO)OC1OCC=CC1=CC=CC=C1 KHPCPRHQVVSZAH-UHFFFAOYSA-N 0.000 description 3
- IANQTJSKSUMEQM-UHFFFAOYSA-N 1-benzofuran Chemical compound C1=CC=C2OC=CC2=C1 IANQTJSKSUMEQM-UHFFFAOYSA-N 0.000 description 2
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 description 2
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 2
- JHWNWJKBPDFINM-UHFFFAOYSA-N Laurolactam Chemical compound O=C1CCCCCCCCCCCN1 JHWNWJKBPDFINM-UHFFFAOYSA-N 0.000 description 2
- CERQOIWHTDAKMF-UHFFFAOYSA-N Methacrylic acid Chemical compound CC(=C)C(O)=O CERQOIWHTDAKMF-UHFFFAOYSA-N 0.000 description 2
- 229920000459 Nitrile rubber Polymers 0.000 description 2
- 229920000299 Nylon 12 Polymers 0.000 description 2
- 239000004952 Polyamide Substances 0.000 description 2
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 description 2
- QTBSBXVTEAMEQO-UHFFFAOYSA-N acetic acid Substances CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 2
- 239000012790 adhesive layer Substances 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 125000003700 epoxy group Chemical group 0.000 description 2
- 150000002148 esters Chemical class 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000003921 oil Substances 0.000 description 2
- 235000019198 oils Nutrition 0.000 description 2
- 229920002647 polyamide Polymers 0.000 description 2
- 125000002924 primary amino group Chemical group [H]N([H])* 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 238000010008 shearing Methods 0.000 description 2
- 238000000638 solvent extraction Methods 0.000 description 2
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 2
- 229920002554 vinyl polymer Polymers 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- WWXUGNUFCNYMFK-UHFFFAOYSA-N Acetyl citrate Chemical compound CC(=O)OC(=O)CC(O)(C(O)=O)CC(O)=O WWXUGNUFCNYMFK-UHFFFAOYSA-N 0.000 description 1
- QZCLKYGREBVARF-UHFFFAOYSA-N Acetyl tributyl citrate Chemical compound CCCCOC(=O)CC(C(=O)OCCCC)(OC(C)=O)CC(=O)OCCCC QZCLKYGREBVARF-UHFFFAOYSA-N 0.000 description 1
- 239000004925 Acrylic resin Substances 0.000 description 1
- 229920000178 Acrylic resin Polymers 0.000 description 1
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 229920001634 Copolyester Polymers 0.000 description 1
- 229920000181 Ethylene propylene rubber Polymers 0.000 description 1
- 208000011092 Hand injury Diseases 0.000 description 1
- CERQOIWHTDAKMF-UHFFFAOYSA-M Methacrylate Chemical compound CC(=C)C([O-])=O CERQOIWHTDAKMF-UHFFFAOYSA-M 0.000 description 1
- 239000004677 Nylon Substances 0.000 description 1
- 239000005062 Polybutadiene Substances 0.000 description 1
- 229920002433 Vinyl chloride-vinyl acetate copolymer Polymers 0.000 description 1
- LZBCVRCTAYKYHR-UHFFFAOYSA-N acetic acid;chloroethene Chemical compound ClC=C.CC(O)=O LZBCVRCTAYKYHR-UHFFFAOYSA-N 0.000 description 1
- 125000004018 acid anhydride group Chemical group 0.000 description 1
- 229920000180 alkyd Polymers 0.000 description 1
- 150000001408 amides Chemical group 0.000 description 1
- NTXGQCSETZTARF-UHFFFAOYSA-N buta-1,3-diene;prop-2-enenitrile Chemical compound C=CC=C.C=CC#N NTXGQCSETZTARF-UHFFFAOYSA-N 0.000 description 1
- 229920005549 butyl rubber Polymers 0.000 description 1
- 238000009924 canning Methods 0.000 description 1
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- KRVSOGSZCMJSLX-UHFFFAOYSA-L chromic acid Substances O[Cr](O)(=O)=O KRVSOGSZCMJSLX-UHFFFAOYSA-L 0.000 description 1
- 229920006026 co-polymeric resin Polymers 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229920003244 diene elastomer Polymers 0.000 description 1
- HQQADJVZYDDRJT-UHFFFAOYSA-N ethene;prop-1-ene Chemical group C=C.CC=C HQQADJVZYDDRJT-UHFFFAOYSA-N 0.000 description 1
- 125000004494 ethyl ester group Chemical group 0.000 description 1
- 239000005038 ethylene vinyl acetate Substances 0.000 description 1
- AWJWCTOOIBYHON-UHFFFAOYSA-N furo[3,4-b]pyrazine-5,7-dione Chemical compound C1=CN=C2C(=O)OC(=O)C2=N1 AWJWCTOOIBYHON-UHFFFAOYSA-N 0.000 description 1
- 229920006270 hydrocarbon resin Polymers 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 239000004816 latex Substances 0.000 description 1
- 229920000126 latex Polymers 0.000 description 1
- FPYJFEHAWHCUMM-UHFFFAOYSA-N maleic anhydride Chemical compound O=C1OC(=O)C=C1 FPYJFEHAWHCUMM-UHFFFAOYSA-N 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- WSFSSNUMVMOOMR-NJFSPNSNSA-N methanone Chemical compound O=[14CH2] WSFSSNUMVMOOMR-NJFSPNSNSA-N 0.000 description 1
- CLDVQCMGOSGNIW-UHFFFAOYSA-N nickel tin Chemical compound [Ni].[Sn] CLDVQCMGOSGNIW-UHFFFAOYSA-N 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- RPQRDASANLAFCM-UHFFFAOYSA-N oxiran-2-ylmethyl prop-2-enoate Chemical compound C=CC(=O)OCC1CO1 RPQRDASANLAFCM-UHFFFAOYSA-N 0.000 description 1
- 239000003209 petroleum derivative Substances 0.000 description 1
- 239000005011 phenolic resin Substances 0.000 description 1
- 150000002989 phenols Chemical class 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 description 1
- 229920002857 polybutadiene Polymers 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 229920001195 polyisoprene Polymers 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 235000013324 preserved food Nutrition 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000009993 protective function Effects 0.000 description 1
- 230000001012 protector Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 239000005060 rubber Substances 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 230000001954 sterilising effect Effects 0.000 description 1
- 238000004659 sterilization and disinfection Methods 0.000 description 1
- 229920003051 synthetic elastomer Polymers 0.000 description 1
- 239000005061 synthetic rubber Substances 0.000 description 1
- 238000009864 tensile test Methods 0.000 description 1
- 150000003505 terpenes Chemical class 0.000 description 1
- 235000007586 terpenes Nutrition 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
- 229920002725 thermoplastic elastomer Polymers 0.000 description 1
- 229920001187 thermosetting polymer Polymers 0.000 description 1
- 239000004416 thermosoftening plastic Substances 0.000 description 1
- 239000005028 tinplate Substances 0.000 description 1
- 239000002966 varnish Substances 0.000 description 1
- 229920006163 vinyl copolymer Polymers 0.000 description 1
Description
【発明の詳細な説明】 (産業上の利用分野) 本発明は切断端縁の保護可能な易開封性缶蓋に関するも
ので、より詳細には格別の器具を用いることなしに缶詰
の開封が容易に行われると共に、開封に際し、鋭利な開
口切断端縁が該端縁よりも外方に延びている樹脂が覆わ
れることにより、指等のケガが防止される機能を備えた
易開封性缶蓋に関する。Description: TECHNICAL FIELD The present invention relates to an easily openable can lid capable of protecting a cut edge, and more particularly, to easily open a can of canned food without using a special device. The easy-open can lid having the function of preventing the injury of fingers and the like by being covered with the resin whose sharp opening cut edge extends outwardly from the edge when being opened. Regarding
(従来の技術) 従来、缶詰用の易開封性缶蓋としては、フルオープン缶
と一般に言われているものが知られている。この缶蓋は
缶蓋に開口すべき部分を区画する開封用スコアを設ける
と共に、この開口すべき部分に開口用タブを設けたもの
であり、開封に際してはスコアが剪断されて開口すべき
部分が缶蓋周辺部から取外される。この取外れた部分の
周囲には鋭利な切断端縁があり、これに指を触れること
によりケガをするという事故が屡々生ずる。(Prior Art) Conventionally, what is generally called a full open can is known as an easily openable can lid for canning. This can lid is provided with an opening score for partitioning the portion to be opened in the can lid, and an opening tab is provided at the portion to be opened.When opening, the score is sheared and the portion to be opened is It is removed from the area around the can lid. There is a sharp cutting edge around the detached portion, and an accident that an injury is often caused by touching this with a finger.
スコア切断により形成される鋭利な切断端縁を予じめ缶
蓋に施こした樹脂被覆帯で覆うことにより、前述したケ
ガを防止することについても多くの提案が行われてい
る。例えば、スコアを跨ぐように樹脂被覆帯を缶蓋の内
面側或いは外面側に設け、スコアの破断と共に樹脂被覆
帯も破断されて、取外される部分の切断端縁も残留する
周辺部の切断端縁も共に保護されるようにしたもの(特
公昭54−20907号公報、特公昭57−44540
号公報)や、スコアを跨ぐように樹脂被覆帯を設ける
が、開封に際し、樹脂被覆帯が破断されずに、取外され
る部分側或いは残留する周辺部側に付着した状態で残る
ようにしたもの(特公昭51−18872号公報及び、
実開昭60−10728号公報)が知られている。Many proposals have been made to prevent the above-mentioned injury by covering a sharp cutting edge formed by score cutting with a resin coating band which is applied to the can lid in advance. For example, a resin-coated band is provided on the inner surface or the outer surface of the can lid so as to straddle the score, and the resin-coated band is also broken when the score is broken, and the cut edge of the removed part remains Those in which both edges are protected (Japanese Patent Publication No. 54-20907, Japanese Patent Publication No. 57-44540)
No. gazette) or a resin coated band is provided so as to straddle the score, but when opened, the resin coated band is not broken and remains in the state of being adhered to the removed part side or the remaining peripheral part side. Things (Japanese Patent Publication No. 51-18872 and
Japanese Utility Model Laid-Open No. 60-10728) is known.
(発明が解決すべき問題点) しかしながら、前者のタイプの樹脂被覆帯では、樹脂被
覆帯がスコアと同時に破断されるようにするために、樹
脂被覆帯を比較的脆いものとするか或いは薄い被覆とす
ることが必要であると共に、缶蓋の切断端縁と面一に樹
脂被覆があるため、切断端縁と指との直接的接触を防止
するには不十分であり、保護効果が未だ十分とは言えな
い。(Problems to be solved by the invention) However, in the former type of resin-coated band, the resin-coated band is made relatively fragile or thin so that the resin-coated band is broken at the same time as the score. In addition to the above, it is insufficient to prevent direct contact between the cutting edge and the finger because the resin coating is flush with the cutting edge of the can lid, and the protective effect is still sufficient. It can not be said.
また、後者のタイプの樹脂被覆帯付易開封性蓋では、缶
蓋の樹脂被覆帯が残る方の部分に接着プライマーを塗布
し、樹脂被覆帯が剥離される方の部分には該プライマー
を塗布しないでおく等の手数のかかる複雑な操作が必要
であり、生産性やコストの点で未だ十分満足し得るもの
でなかった。更に、上述した塗料の塗り分け手段を使用
しない場合には、樹脂被覆帯が取外される部分側に付着
して移行するか、或いは残留する周辺部側に付着して移
行するかを、厳密に制御することが困難となるという事
態を生じる。In the latter type of easy-open lid with a resin-coated band, the adhesive primer is applied to the part of the can lid where the resin-coated band remains, and the primer is applied to the part where the resin-coated band is peeled off. It requires complicated operations such as not doing so, and it has not been sufficiently satisfactory in terms of productivity and cost. Further, when the above-mentioned means for separately coating the paint is not used, it is strictly determined whether the resin coating band adheres to the part side to be removed and migrates, or adheres to the remaining peripheral part side and migrates. It will be difficult to control.
従って、本発明の目的は缶蓋の開口すべき部分も缶蓋周
辺部も同一の外面塗膜を有しながら、開封に際し、開封
用スコアより外側の樹脂被覆帯と缶蓋周辺部との間で剥
離が確実に生じ、開口部切断端縁が樹脂被覆帯で覆われ
た状態で開封が行われる易開封性缶蓋を提供するにあ
る。Therefore, an object of the present invention is to provide a space between the resin-covered band outside the opening score and the can lid peripheral portion at the time of unsealing while having the same outer coating film on both the can lid opening portion and the can lid peripheral portion. It is an object of the present invention to provide an easily-openable can lid in which peeling occurs reliably and the opening is performed with the cut edge of the opening being covered with the resin coating band.
本発明の他の目的は、開封に際し、樹脂被覆帯が開口す
べき部分に確実に固定される機構を備えた易開封性缶蓋
を提供するにある。Another object of the present invention is to provide an easily-openable can lid provided with a mechanism for surely fixing a resin-coated band to a portion to be opened when opening.
(問題点を解決するための手段) 本発明者等は、缶蓋の開封用スコアの内側に、リム部乃
至段差部を設けると共に、樹脂被覆帯をこのリム部乃至
段差部を覆うように設けるときには、このリム部乃至段
差部が、樹脂被覆帯の径外方向への移動を有効に阻止す
るための缶蓋−樹脂被覆帯係合機構となり、缶蓋の開口
すべき部分も缶蓋周辺部も同一の外面塗膜を有する場合
にも開封用スコアより外側の樹脂被覆帯と缶蓋周辺部と
の間で剥離を生じ、開口部切断端縁がそれより外方に突
出した樹脂被覆帯で覆われた状態で開封が行われるこ
と、及び用いる樹脂被覆帯が下記式 式中、Aは樹脂被覆帯と蓋との単位幅(cm)当りの接着強
度であり、Tは、樹脂被覆帯の単位幅(cm)当りの強さで
あり、Cは定数(900)である。(Means for Solving Problems) The inventors of the present invention provide a rim portion or a step portion inside the opening score of the can lid, and provide a resin coating band so as to cover the rim portion or the step portion. At times, the rim portion or the stepped portion serves as a can lid-resin coated belt engaging mechanism for effectively preventing the radial movement of the resin coated belt, and the portion of the can lid to be opened is also the peripheral portion of the can lid. Even if they have the same outer surface coating, peeling occurs between the resin-coated band outside the opening score and the peripheral part of the can lid, and the cut edge of the opening is a resin-coated band projecting outward from it. Opening is performed in the covered state, and the resin coated band used is the following formula In the formula, A is the adhesive strength per unit width (cm) between the resin coating band and the lid, T is the strength per unit width (cm) of the resin coating band, and C is a constant (900). is there.
を満足する樹脂被覆帯である場合には、樹脂被覆帯の破
断を防止しながら、開封に際し、開口すべき部分への被
覆帯の固定と缶蓋周辺部からの被覆帯の剥離とを確実に
行い得ることを見出した。In the case of a resin-covered band that satisfies the above conditions, the resin-covered band is prevented from breaking, and at the time of opening, the fixing of the coating band to the portion to be opened and the peeling of the coating band from the periphery of the can lid are ensured. I found that I could do it.
(作用) 樹脂被覆帯がスコアと共に破断されることなく、開口す
べき部分に固定された状態で開封が行われるタイプの易
開封性缶蓋においては、樹脂被覆帯と缶蓋との接触は、
剥離性接着と呼ばれる領域で行われなければならない。
剥離性接着とは、樹脂の凝集破壊力に比して界面での接
着強度が小で、しかもこの接着強度が指による開封力に
比して小さいものと定義される。(Function) In the easily-openable can lid of the type in which the resin-coated band is not broken together with the score and is opened in a state of being fixed to the portion to be opened, the contact between the resin-coated band and the can lid is
It must be done in an area called peel adhesion.
Peelable adhesion is defined as the adhesive strength at the interface is lower than the cohesive failure force of the resin, and this adhesive strength is lower than the opening force by a finger.
缶蓋の開口すべき部分と缶蓋周辺部とに、接着塗料の塗
布と未塗布との区別をつけ、或いは接着強度の異なる2
種の塗料を夫々設ける場合には、缶蓋周辺部と樹脂被覆
帯との接着強度を前述した剥離性接着領域に維持しなが
ら、樹脂被覆帯を開口すべき部分に接着固定することが
可能であろうが、缶蓋の開口すべき部分も缶蓋周辺部も
同一の外面塗膜を有する場合には、スコアを境界として
開口すべき部分と缶蓋周辺部との間に接着強度に差異を
与えることが到底困難となる。The area where the can lid is to be opened and the area around the can lid are distinguished by applying or not applying adhesive paint, or by different adhesive strengths.
When each type of paint is provided, it is possible to bond and fix the resin-coated band to the portion to be opened while maintaining the adhesive strength between the can lid peripheral portion and the resin-coated band in the peelable adhesive region described above. However, if the area of the can lid to be opened and the area around the can lid have the same outer surface coating, there is a difference in the adhesive strength between the area to be opened and the area around the can lid with the score as a boundary. It will be very difficult to give.
しかも、缶蓋の耐腐食性の点では、缶蓋全面に耐腐食性
に優れた塗膜を設けることが必須不可欠のものと言って
よく、また素材から缶蓋への苛酷な加工条件からすれ
ば、この耐腐食性塗膜は優れた加工性を有することが要
求される。かかる見地から、缶蓋外面に施こす塗膜は開
口すべき部分も缶蓋周辺部も共に同一の塗膜であること
が望ましく、しかも缶蓋全外面を同一塗膜とすることは
複雑な塗布操作を避け、工程を簡略化して、生産性を上
げ、缶蓋製造コストを下げる点でも望ましい。Moreover, from the viewpoint of the corrosion resistance of the can lid, it can be said that it is essential to provide a coating film with excellent corrosion resistance on the entire surface of the can lid. For example, this corrosion resistant coating film is required to have excellent processability. From this point of view, it is desirable that the coating applied to the outer surface of the can lid is the same coating on both the opening portion and the peripheral portion of the can lid, and it is complicated to apply the same coating on the entire outer surface of the can lid. It is also desirable in terms of avoiding operations, simplifying the process, increasing productivity, and reducing can lid manufacturing costs.
本件発明は、缶蓋に設けられた開口すべき部分を区画す
る開封用スコアと、開口すべき部分に設けられた開封用
タブと、開口すべき部分と缶蓋周辺部との間にスコア上
部にまたがるように設けられた切断端縁保護用樹脂被覆
帯とから成る易開封性缶蓋に関するものであるが、 (イ) 缶蓋の開口すべき部分も缶蓋周辺部も同一の外面塗
膜を有すること、 (ロ) 缶蓋の開封用スコアの内側にリム部乃至段差部を設
けると共に、このリム部乃至段差部を覆うように樹脂被
覆帯を設けていること、 (ハ) この樹脂被覆帯は、下記式 式中、Aは樹脂被覆帯と蓋との単位幅(cm)当りの接着
強度であり、Tは、樹脂被覆帯の単位幅(cm)当りの強
さであり、Cは定数(900)である。The present invention relates to an opening score for partitioning a portion to be opened provided on a can lid, an opening tab provided to a portion to be opened, and an upper score portion between the portion to be opened and the peripheral portion of the can lid. The present invention relates to an easily-openable can lid, which comprises a resin coating strip for protecting the cutting edge provided so as to straddle the outer surface of the can lid. (B) A rim portion or a step portion is provided inside the opening score of the can lid, and a resin coating band is provided so as to cover the rim portion or the step portion. (C) This resin coating Obi is the following formula In the formula, A is the adhesive strength per unit width (cm) between the resin coating band and the lid, T is the strength per unit width (cm) of the resin coating band, and C is a constant (900). is there.
を満足する樹脂被覆帯であること、 及び (ニ) 開封に際し、開封用スコアより外側の樹脂被覆帯と
缶蓋周辺部との間で剥離を生じ、開口部切断端縁が樹脂
被覆帯で覆われた状態で開封が行われるようにしたこ
と、 の組合せに特徴を有するものである。(D) When opening, peeling occurs between the resin-covered band outside the opening score and the peripheral portion of the can lid, and the cut edge of the opening is covered with the resin-covered band. It is characterized by the combination that the opening is performed in the opened state.
以下各要件について説明する。Each requirement will be described below.
(イ) の要件は、缶蓋の耐腐食性の点では、缶蓋全面に耐
腐食性に優れた塗膜を設けることが必須不可欠のもので
あり、また素材から缶蓋への苛酷な加工条件からすれ
ば、この耐腐食性塗膜は優れた加工性を有することが要
求される。かかる見地から、缶蓋外面に施こす塗膜は開
口すべき部分も缶蓋周辺部も共に同一の塗膜であること
が要求される。Regarding the requirement of (a), in terms of the corrosion resistance of the can lid, it is indispensable to provide a coating film with excellent corrosion resistance on the entire surface of the can lid. In view of the conditions, this corrosion resistant coating film is required to have excellent workability. From this point of view, the coating applied to the outer surface of the can lid is required to have the same coating in both the portion to be opened and the peripheral portion of the can lid.
しかも缶蓋全外面を同一塗膜とすることは複雑な塗布操
作を避け、工程を簡略化して、生産性を上げ、缶蓋製造
コストを下げる利点がある。Moreover, forming the same coating film on the entire outer surface of the can lid has the advantages of avoiding complicated coating operation, simplifying the process, increasing productivity, and reducing the manufacturing cost of the can lid.
(ロ) の要件は、樹脂被覆帯が開封用スコアをシールし、
且つ開封の際は開口部側への接着を確実にし缶蓋周辺部
側で剥離を生ずるようにするためである。開封用スコア
部分は金属板厚が薄く且つ外面の塗膜が無いから樹脂被
覆帯は開封用スコアを十分にシールし、缶の輸送取扱中
に剥離を生じないことが必要で、しかも開封の際には缶
蓋周辺部側が剥離して開口部側の鋭利な切断端縁をカバ
ーしてくれる必要がある。The requirement of (b) is that the resin coated band seals the opening score,
Further, it is for ensuring the adhesion to the opening side at the time of opening the package so that the peeling may occur on the peripheral side of the can lid. Since the opening score part has a thin metal plate and there is no coating on the outer surface, it is necessary for the resin-coated band to sufficiently seal the opening score so that peeling does not occur during transportation and handling of the can. It is necessary for the peripheral part of the can lid to be peeled off to cover the sharp cutting edge on the opening side.
本件発明では、開封用スコアの内側にリム部乃至段差部
を設け、樹脂被覆帯は開封用スコアをシールすると共に
このリム部乃至段差部を越えて接着されており、樹脂被
覆帯の幅方向の端部が下方へ折り曲げ缶蓋塗膜に接着す
るため樹脂被覆帯の缶蓋への付着力は著しく向上する。
端部から剥れることが防止される。更に径外方向きの引
張り力に対し十分に耐えるようになりアンカーとしての
機能を果すことができる。In the present invention, a rim portion or a step portion is provided inside the opening score, and the resin-coated band seals the opening score and is bonded over the rim portion or the step portion. Since the end portion is bent downward and adheres to the coating film on the can lid, the adhesive force of the resin coating strip to the can lid is significantly improved.
It is prevented from peeling from the end. Furthermore, it can sufficiently withstand the tensile force in the radially outward direction, and can function as an anchor.
これは缶が取扱中、輸送中等で衝撃や振動を受けたとき
に剥離防止効果が著しい。またリム部乃至段差部を設け
ることは、缶蓋のこの部分とその近傍を強化し変形防止
に役立ち、開封用スコアの保護、樹脂被覆帯の剥離防止
に役立っている。This has a remarkable effect of preventing peeling when the can is subjected to shock or vibration during handling or transportation. Further, the provision of the rim portion or the stepped portion strengthens this portion of the can lid and the vicinity thereof to help prevent deformation, protects the opening score, and prevents peeling of the resin coating band.
(ハ) の要件は、樹脂被覆帯の下地塗膜に対する接着強
度、樹脂被覆帯の強度等についても適正な範囲があるこ
とを示すものである。前記式(1),(2) 及び(3) を満足
することにより樹脂被覆帯の破断を防止しながら、開口
すべき部分への樹脂被覆帯の固定と缶蓋周辺部からの剥
離を確実に行い得るようにするものである。The requirement of (c) indicates that there is an appropriate range for the adhesive strength of the resin-coated strip to the base coating film, the strength of the resin-coated strip, and the like. By satisfying the above formulas (1), (2) and (3), it is possible to prevent the resin-coated band from breaking while ensuring that the resin-coated band is fixed to the area to be opened and peeled from the peripheral part of the can lid. It is something that can be done.
前記式(1) は、易開封性と樹脂被覆帯の固定とのバラン
スに関するものであり、接着強度(A)が2000g/cmを越
えると、樹脂被覆帯の剥離が全面にわたって困難とな
り、蓋の開口力への影響が大きく成り過ぎ、蓋が開けに
くくなるか、最も悪い場合には開口不能となる。また、
接着強度(A)が10g/cmより小さくなると、樹脂被覆
帯の固定が困難となり、蓋の取扱い中、加熱殺菌中、輸
送中に樹脂被覆帯が蓋から剥離してしまい、保護の役を
果たさなくなる。The above formula (1) relates to the balance between the easy-open property and the fixing of the resin-coated band, and when the adhesive strength (A) exceeds 2000 g / cm, peeling of the resin-coated band becomes difficult over the entire surface and the lid The effect on the opening force becomes too large, making it difficult to open the lid, or in the worst case, opening is impossible. Also,
If the adhesive strength (A) is less than 10 g / cm, it becomes difficult to fix the resin-coated band, and the resin-coated band peels off from the lid during handling, heat sterilization, and transportation, which serves as a protective function. Disappear.
前記式(2) は、樹脂被覆帯の破断を防止することに関連
するものであり、樹脂被覆帯の強さ(T)が20g/cm以
下になると、開口時に樹脂被覆帯が破断してしまい、蓋
開口部の切断端縁をそれより外方に突出した樹脂被覆帯
でカバーすることができない。The above formula (2) relates to preventing breakage of the resin-coated band, and when the strength (T) of the resin-coated band becomes 20 g / cm or less, the resin-coated band will break at the time of opening. The cut edge of the lid opening cannot be covered with the resin coating band protruding outwardly from the cut edge.
前記式(3) も樹脂被覆帯の缶蓋からの剥離と樹脂被覆帯
の破断とに関連するものであり、前記式(3) が満足され
ない場合には、開封に際し樹脂被覆帯は缶蓋周辺部から
剥離されることなく、破断し、切断端縁部保護の役目が
十分に果たされないことになる。The above formula (3) is also related to the peeling of the resin-coated band from the can lid and the breakage of the resin-coated band.If the above-mentioned formula (3) is not satisfied, the resin-coated band should be around the can lid when opening. Without being peeled off from the part, it breaks and the role of protecting the cut edge part is not fully fulfilled.
(ニ) の要件は、上記(イ),(ロ) 及び(ハ) の要件を満足する
ことにより、缶蓋の開封に際し、開封用スコアより外側
の樹脂被覆帯と缶蓋周辺部との間で剥離を生じ、開口部
切断端縁が樹脂被覆帯で覆われた状態で開封することが
できる。The requirement of (d) is that by satisfying the requirements of (a), (b) and (c) above, when the can lid is opened, the space between the resin coating band outside the opening score and the can lid peripheral part is Then, peeling occurs, and the opening can be opened in a state where the cut edge is covered with the resin coating band.
(好適実施態様の説明) 本発明の缶蓋−樹脂被覆帯係合機構は、缶蓋の開封用ス
コアの内側に設けられたリム部乃至段差部から成り、こ
のリム部乃至段差部を覆うように樹脂被覆帯を設ける。
このリム部乃至段差部と開封用スコアとの間には、第二
のスコアを設けて、樹脂被覆との補助的な係合機構とす
ることもできる。(Explanation of a preferred embodiment) The can lid-resin coating band engagement mechanism of the present invention comprises a rim portion or a step portion provided inside the opening score of the can lid, and covers the rim portion or the step portion. A resin coated band is provided on.
A second score may be provided between the rim portion or stepped portion and the opening score to provide an auxiliary engagement mechanism with the resin coating.
本発明は、以下の場合に限定されないが、特に樹脂被覆
帯がスコア上部から缶蓋周辺部にかけては比較的小さい
巾で設けられ、スコア上部から開口すべき部分にかけて
は前記係合機構に達するように比較的広い巾で設けられ
ていることが望ましい。The present invention is not limited to the following cases, but in particular, the resin coating band is provided with a relatively small width from the upper part of the score to the peripheral part of the can lid, and reaches the engaging mechanism from the upper part of the score to the part to be opened. It is desirable to have a relatively wide width.
缶蓋全外表面に設けられている塗膜は、耐腐食性と耐加
工性とに優れた有機樹脂保護塗膜であるべきであり、一
方樹脂被覆帯は指に対する保護効果の点でエラストマー
から成ることが望ましい。両者の組合せは、前記式(1),
(2) 及び(3) を満足するべきであり、一層好適には、式 を満足するのがよい。The coating film provided on the entire outer surface of the can lid should be an organic resin protective coating film with excellent corrosion resistance and work resistance, while the resin coating band is made of an elastomer from the viewpoint of protecting the fingers. Is desirable. The combination of the two, the above formula (1),
It should satisfy (2) and (3), and more preferably the formula Should be satisfied.
本発明を添付図面に示す具体例に基づき説明する。The present invention will be described based on specific examples shown in the accompanying drawings.
本発明の蓋の上面を示す第1図、その側断面を示す第2
図及び要部の拡大断面を示す第3−B図において、この
缶蓋1は、第3−B図に示す通り、金属素材2とその外
面全面に施された外面保護塗膜3a及びその内面全面に
施された内面保護塗膜3bとから成る断面構造を有して
いる。FIG. 1 is a top view of the lid of the present invention, and FIG.
3 and FIG. 3B showing an enlarged cross section of the main part, the can lid 1 has a metal material 2 and an outer surface protective coating 3a applied to the entire outer surface and the inner surface thereof, as shown in FIG. 3B. It has a cross-sectional structure composed of the inner surface protective coating film 3b applied to the entire surface.
この蓋1は、外周に周状の溝部4と溝部に環状リム部5
を介して連なるパネル部6とを備えており、溝部4には
缶胴フランジ(図示せず)との二重巻締に際して、これ
と密封係合されるシーリングコンパウンド層7が設けら
れている。環状リム部5の内方には、スコア8で区画さ
れる開口されるべき部分9がある。この開口用部分9は
パネル部6の大部分と実質上一致していてもよいし、パ
ネル部6の一部が開口用部分であってもよい。スコア8
は、第3−B図の拡大断面図に示す通り、金属素材2の
厚み方向の途中に達するように設けられている。This lid 1 has a circumferential groove portion 4 on the outer circumference and an annular rim portion 5 on the groove portion.
And a panel portion 6 which is continuous through the groove portion 4 and a sealing compound layer 7 which is sealingly engaged with the can body flange (not shown) at the time of double winding. Inside the annular rim 5 there is a portion 9 to be opened, which is delimited by a score 8. The opening portion 9 may substantially coincide with most of the panel portion 6, or a part of the panel portion 6 may be the opening portion. Score 8
Is provided so as to reach the middle of the metal material 2 in the thickness direction, as shown in the enlarged sectional view of FIG. 3-B.
この開口用部分9に開封用タブ10が以下に述べる仕組
みで設けられている。この開封用タブ10は、一端にス
コア押裂き用先端11、他端に把持部(リング)12及
びこれらの間に位置し且つ蓋に対して接合される支点部
分13を有している。この具体例において、支点部分1
3は、先端11とリング12との間でタブに、形状がほ
ぼU字型の切目14を、支点部分13と先端11との間
に接続部15が存在するように設けて舌片状とすること
により形成されている。開封用タブ10の押裂き用先端
11は、蓋体のスコア8とその位置がほぼ一致するよう
に、舌片状の支点部分13において、蓋体の開口用部分
9と、例えば熱可塑性樹脂接着剤層16を介して熱接着
されることにより固定されている。An opening tab 10 is provided on the opening portion 9 by a mechanism described below. The unsealing tab 10 has a score cleaving tip 11 at one end, a grip portion (ring) 12 at the other end, and a fulcrum portion 13 located between them and joined to a lid. In this example, the fulcrum part 1
3 has a tab between the tip 11 and the ring 12 and is provided with a notch 14 having a substantially U-shape so that a connecting portion 15 exists between the fulcrum portion 13 and the tip 11 to form a tongue shape. It is formed by doing. The tearing tip 11 of the unsealing tab 10 is bonded to the opening portion 9 of the lid body by, for example, a thermoplastic resin adhesive at the tongue-shaped fulcrum portion 13 so that the position thereof substantially coincides with the score 8 of the lid body. It is fixed by being heat-bonded through the agent layer 16.
開口用部分9を区画するスコア8よりも内側には第二ス
コア17と、更に第二スコアよりも小間隔をおいて内側
にリム部乃至段差部18とが設けられている。巻蓋1の
外面側には、スコア8を跨ぐようにエラストマーから成
る切断端縁保護用樹脂被覆帯19が設けられている。こ
の樹脂被覆帯19はスコア8の全周にわたって設けられ
ており、しかも第3−Bによく示される通り、スコア8
よりも外側には比較的小さい巾で、且つスコア8よりも
内側には、第二スコア17及びリム部18を完全に覆う
ように比較的広い巾で設けられている。また、樹脂被覆
帯19は第二スコア17の内部、即ち溝内にも充填され
ていることが理解される。A second score 17 is provided inside the score 8 that defines the opening portion 9, and a rim portion or a step portion 18 is provided inside the score 8 at a smaller interval than the second score. On the outer surface side of the winding lid 1, a resin coating strip 19 made of an elastomer for protecting the cutting edge is provided so as to straddle the score 8. The resin-coated band 19 is provided over the entire circumference of the score 8 and, as is often shown in Section 3-B, the score 8
The outer side is provided with a relatively small width, and the inner side with respect to the score 8 is provided with a relatively wide width so as to completely cover the second score 17 and the rim portion 18. Further, it is understood that the resin coated band 19 is also filled inside the second score 17, that is, in the groove.
この具体例も缶蓋において、開封用タブ10のリング2
を指で掴み、これを上方に持ち上げると、この力が支点
部分13を介して押裂用先端11に下向きの力として伝
達され、スコア8に下向きの押裂力が加わり、スコア8
の剪断が開始される。次いで開封用タブ10を更に上に
持ち上げることにより、開口用部分9も上方に持ち上げ
られ、スコア8の剪断が更に進行して、開口用部分の取
外しが行われる。この開口途中の段階を説明する第4図
において、スコア8の剪断開口時には、開口用部分9と
その外周部20との間には段差が生じていることがわか
る。前述した第二スコア17やリム部乃至段差部18
は、樹脂被覆帯19と係合して、この被覆帯19が径外
方向に引張られて移動するのを阻止し且つ固定する作用
を有していることが理解されよう。また、開口用部分9
とその外周部20との間に形成される段差により、被覆
帯19の開口用部分9の切断端縁21よりも外方に突出
した部分22では外周部20との間に剥離が進行し、且
つこの突出部分22が切断端縁21と指との接触を防止
するプロテクターとしての作用をすることも了解されよ
う。In this concrete example as well, the ring 2 of the opening tab 10 is used in the can lid.
When the finger is gripped and lifted upward, this force is transmitted as a downward force to the cleaving tip 11 via the fulcrum portion 13, and a downward cleaving force is added to the score 8 to give a score 8
Shearing is started. Then, by opening the opening tab 10 further upward, the opening portion 9 is also lifted upward, the shearing of the score 8 further progresses, and the opening portion is removed. In FIG. 4 explaining the stage in the middle of this opening, it can be seen that there is a step between the opening portion 9 and the outer peripheral portion 20 during the shear opening of the score 8. The second score 17 and the rim portion or step portion 18 described above.
It will be appreciated that has the effect of engaging the resin coating strip 19 and preventing and securing the coating strip 19 from being pulled radially outward. Also, the opening portion 9
Due to the step formed between the outer peripheral portion 20 and the outer peripheral portion 20, the portion 22 protruding outward from the cutting edge 21 of the opening portion 9 of the covering band 19 is peeled off from the outer peripheral portion 20, Further, it will be understood that the projecting portion 22 acts as a protector for preventing the cut edge 21 from coming into contact with the finger.
図面に示す具体例では、缶蓋への開封用タイプの固定は
接着のみならず、従来のリベット打ちによる機械的固定
で行ってもよいのは当然である。In the specific example shown in the drawings, the fixing of the opening type to the can lid may be performed not only by adhesion but also by conventional mechanical fixing by riveting.
缶蓋を形成する金属素材は、表面処理鋼板やアルミニウ
ム板であってもよいが、本発明は剛性のある鋭利な切断
端縁が形成され易い表面処理鋼板から成る易開封性缶蓋
に特に有用である。表面処理鋼板としては、電解クロム
酸処理鋼板(TFS)、錫メッキ鋼板(ブリキ)、ニッ
ケルメッキ鋼板、錫ニッケル合金メッキ鋼板、アルミメ
ッキ鋼板等を挙げることができるが、これらの例に限定
されない。金属素材は、一般に0.10乃至0.40mm、特に0.
12乃至0.35mmの厚みを有するものがよい。The metal material forming the can lid may be a surface-treated steel plate or an aluminum plate, but the present invention is particularly useful for an easily-openable can lid made of a surface-treated steel plate on which a rigid and sharp cutting edge is easily formed. Is. Examples of the surface-treated steel sheet include electrolytic chromic acid-treated steel sheet (TFS), tin-plated steel sheet (tinplate), nickel-plated steel sheet, tin-nickel alloy-plated steel sheet, and aluminum-plated steel sheet, but are not limited to these examples. Metal materials are generally 0.10 to 0.40 mm, especially 0.
It preferably has a thickness of 12 to 0.35 mm.
保護塗膜としては、前述した金属素材に対して優れた密
着性を示すそれ自体公知の任意の保護塗料が使用され
る。この塗料としては、熱硬化性或いは熱可塑性の樹脂
塗料、例えばフェノール・エポキシ塗料、アミノ・エポ
キシ塗料、エポキシ・エステル塗料等の変性エポキシ塗
料;例えば塩化ビニル−酢酸ビニル共重合体、塩化ビニ
ル−酢酸ビニル共重合体部分ケン化物、塩化ビニル−酢
酸ビニル−無水マレイン酸共重合体、エポキシ変性−、
エポキシアミノ変性−或いはエポキシフェノール変性−
ビニル樹脂塗料等のビニル又は変性ビニル塗料;アクリ
ル樹脂系塗料;油性塗料;アルキッド塗料;ポリエステ
ル塗料;スチレン−ブタジエン系共重合体等の合成ゴム
系塗料等が使用される。As the protective coating, any protective coating known per se which exhibits excellent adhesion to the above-mentioned metal material is used. Examples of the paint include thermosetting or thermoplastic resin paints, for example, modified epoxy paints such as phenol / epoxy paints, amino / epoxy paints, and epoxy / ester paints; for example, vinyl chloride-vinyl acetate copolymers, vinyl chloride-acetic acid. Partially saponified vinyl copolymer, vinyl chloride-vinyl acetate-maleic anhydride copolymer, epoxy modified-,
Epoxy amino modified-or epoxy phenol modified-
Vinyl or modified vinyl paints such as vinyl resin paints; acrylic resin paints; oil paints; alkyd paints; polyester paints; synthetic rubber paints such as styrene-butadiene copolymers are used.
密着性と耐腐食性とに優れたプライマー塗料の代表的な
ものは、種々のフェノール類とホルムアルデヒドから誘
導されるレゾール型フェノール−アルデヒド樹脂と、ビ
スフェノール型エポキシ樹脂とから成るフェノール−エ
ポキシ系塗料であり、特にフェノール樹脂とエポキシ樹
脂とを90:10乃至5:95の重量比で含有する塗料
である。この塗料は更に加工性にも優れており、スコア
加工に付した場合にも、スコア加工部の耐腐食性が良好
であるという利点を有している。このタイプの塗料は、
タブの固定に用いるポリアミド系接着剤にも優れた密着
性を有している。A typical primer paint with excellent adhesion and corrosion resistance is a phenol-epoxy paint that consists of a resol-type phenol-aldehyde resin derived from various phenols and formaldehyde, and a bisphenol-type epoxy resin. In particular, it is a coating material containing a phenol resin and an epoxy resin in a weight ratio of 90:10 to 5:95. This paint is also excellent in workability, and has an advantage that the score-processed portion has good corrosion resistance even when subjected to score processing. This type of paint is
It also has excellent adhesion to polyamide adhesives used for fixing tabs.
密着性及び耐腐食性に優れた保護塗料の他の代表例は、
極性基を有する塩化ビニル共重合樹脂塗料である。この
塗料は、カルボキシル基、酸無水物基、エポキシ基等の
極性基を、樹脂100g当り50乃至2000ミリモルの濃
度で含有するものであり、アクリル酸、メタクリル酸、
無水マレイン酸、アクリル酸又はメタクリル酸のヒドロ
キシ−プロピル又はエチルエステル、グリシジルアクリ
レート(メタクリレート)等を、必要に応じ酢酸ビニル
等の他のコモノマーと共に、塩化ビニルと共重合させる
ことにより得られる樹脂を含有する塗料である。水酸基
は共重合体中の酢酸ビニル単位をケン化することによっ
ても供給されうるし、またエポキシ基はエポキシ樹脂や
エポキシフェノール塗料で共重合体を変性することによ
っても供給し得る。Other representative examples of protective coatings with excellent adhesion and corrosion resistance are:
It is a vinyl chloride copolymer resin paint having a polar group. This paint contains a polar group such as a carboxyl group, an acid anhydride group and an epoxy group at a concentration of 50 to 2000 mmol per 100 g of resin, and acrylic acid, methacrylic acid,
Contains a resin obtained by copolymerizing maleic anhydride, hydroxy-propyl or ethyl ester of acrylic acid or methacrylic acid, glycidyl acrylate (methacrylate), etc., with other comonomers such as vinyl acetate, and vinyl chloride, if necessary. It is a paint that does. The hydroxyl group can be supplied by saponifying vinyl acetate units in the copolymer, and the epoxy group can be supplied by modifying the copolymer with an epoxy resin or an epoxyphenol paint.
勿論、これらの塗膜は、単層構成でもよく、またベース
コートとトップコートとの組合せのように複層構成であ
っても何等差支えない。Needless to say, these coating films may have a single-layer structure or a multi-layer structure such as a combination of a base coat and a top coat.
更に、ベースコート上に印刷を施こし、その上に仕上ニ
スを施こすことも勿論可能である。Furthermore, it is of course possible to print on the base coat and then apply a finishing varnish on it.
塗膜の厚みは、前述した目的が達成される限り、特に制
限はないが、一般的に言って、0.2 乃至30μm、特に
1乃至20μmの範囲にあるのが望ましい。The thickness of the coating film is not particularly limited as long as the above-mentioned object is achieved, but generally speaking, it is preferably in the range of 0.2 to 30 μm, particularly 1 to 20 μm.
開封用タブは、缶蓋を構成する素材と同種或いは異種の
素材から形成されていてもよい。例えばアルミニウム或
いはアルミニウム合金のような軽金属板から形成されて
いてもよいし、また表面処理鋼板から形成されていても
よい。また十分な剛性を有するものであれば、プラスチ
ック材料から形成されたものであってもよい。The opening tab may be formed of the same or different material as the material forming the can lid. For example, it may be formed of a light metal plate such as aluminum or an aluminum alloy, or may be formed of a surface-treated steel plate. Further, as long as it has sufficient rigidity, it may be formed of a plastic material.
開封用タブの固定を熱可塑性接着剤で行う場合、アミド
反復単位及び/又はエステル反復単位含有樹脂が好まし
く、融点或いは軟化点が50乃至300℃、特に80乃
至270℃の範囲にあるホモ乃至コポリアミド、コポリ
エステル或いはこれらの2種以上のブレンド物が使用さ
れる。When the opening tab is fixed with a thermoplastic adhesive, a resin containing an amide repeating unit and / or an ester repeating unit is preferable, and a homo or co-polymer having a melting point or a softening point of 50 to 300 ° C., particularly 80 to 270 ° C. Polyamide, copolyester or blends of two or more of these are used.
開封用スコア8は、スコア部における残留厚みが、素板
厚の1/8乃至1/2で且つ絶対的厚みが、0.2 乃至
0.9mm、特に0.3 乃至0.8mm の範囲となるようなもので
あることが望ましい。The unsealing score 8 has a residual thickness of 1/8 to 1/2 of the raw plate thickness and an absolute thickness of 0.2 to
It is desirable that it is in the range of 0.9 mm, particularly 0.3 to 0.8 mm.
一方、缶蓋−樹脂被覆帯係合機構となる第二スコアは、
樹脂の充填と両者の係合とが可能となるような該寸法を
有するべきであり、スコアの開口部巾が0.03mm以上好ま
しくは0.05mm以上、より好ましくは0.07mm以上であり、
且つスコアのテーパ角度が150度以下、特に135度
以下の範囲にあることが望ましい。また、係合機構とな
るリム部乃至段差部の段差寸法は0.10乃至1.00mm、特に
0.15乃至0.60mmの範囲にあることが望ましく、水平面に
対してなす角度は20乃至90度、特に30乃至85度
であることが望ましい。On the other hand, the second score, which is the can lid-resin coating belt engagement mechanism,
It should have such dimensions that it is possible to fill the resin and engage with each other, and the opening width of the score is 0.03 mm or more, preferably 0.05 mm or more, more preferably 0.07 mm or more,
In addition, it is desirable that the taper angle of the score is 150 degrees or less, particularly 135 degrees or less. In addition, the step size of the rim part or the step part that becomes the engagement mechanism is 0.10 to 1.00 mm, especially
The angle is preferably in the range of 0.15 to 0.60 mm, and the angle formed with respect to the horizontal plane is preferably 20 to 90 degrees, particularly 30 to 85 degrees.
樹脂被覆帯としては、多くのエラストマー、例えば軟質
塩化ビニル樹脂、エチレン−酢酸ビニル共重合体、スチ
レン−ブタジエンブロック共重合体、ポリウレタン等の
熱可塑性エラストマーの他に、エチレン−プロピレンゴ
ム、エチレン−プロピレン−ジエンゴム、スチレン−ブ
タジエンゴム、ニトリル−ブタジエンゴム、ポリブタジ
エン、ポリイソプレン、ブチルゴム等のゴムも使用し得
る。Examples of the resin-coated belt include many elastomers such as soft vinyl chloride resin, ethylene-vinyl acetate copolymer, styrene-butadiene block copolymer, and thermoplastic elastomer such as polyurethane, as well as ethylene-propylene rubber, ethylene-propylene. Rubbers such as diene rubber, styrene-butadiene rubber, nitrile-butadiene rubber, polybutadiene, polyisoprene, butyl rubber may also be used.
樹脂被覆帯の単位巾当りの接着強度(A)は例えば粘着
付与剤の添加によって、一定の範囲内にすることができ
る。粘着付与剤としてはクマロン樹脂、フェノール、テ
ルペン系樹脂、石油系炭化水素樹脂、ロジン誘導体等を
用いることができる。また樹脂被覆帯の単位巾当りの強
さ(T)も樹脂被覆帯の引張り強度及び厚さを選ぶこと
により一定の範囲内にすることができる。The adhesive strength (A) per unit width of the resin-coated band can be set within a certain range by adding a tackifier, for example. As the tackifier, coumarone resin, phenol, terpene resin, petroleum hydrocarbon resin, rosin derivative and the like can be used. Also, the strength (T) per unit width of the resin-coated band can be set within a certain range by selecting the tensile strength and the thickness of the resin-coated band.
これらの樹脂は、溶液、ラテックス、プラスチゾル、オ
ルガノゾル等の形で缶蓋の表面に施こす。第二スコア内
への充填を確実に行うためには、塗布液の粘度は4000cp
s以下とするのが望ましい。These resins are applied to the surface of the can lid in the form of solution, latex, plastisol, organosol or the like. The viscosity of the coating solution is 4000 cp to ensure the filling into the second score.
It is desirable to set it to s or less.
樹脂被覆帯の平均厚みは、巾方向に平均して、一般に0.
005 乃至0.5mm 、特に0.01乃至0.30mmとすることが望ま
しく、また保護効果の点で、スコア8から外方への突出
寸法は0.005 乃至3mm 、特に0.01乃至2mmの範囲とする
ことが望ましい。The average thickness of the resin coated band is generally 0, on average in the width direction.
005 to 0.5 mm, particularly 0.01 to 0.30 mm is desirable, and from the viewpoint of protection effect, it is desirable that the outward projection from the score 8 is in the range of 0.005 to 3 mm, particularly 0.01 to 2 mm.
(発明の作用効果及び実施例) 本発明よる優れた作用効果を次の実験及び実施例で説明
する。(Effects and Examples of the Invention) The excellent effects of the present invention will be described in the following experiments and examples.
実験及び実施例の説明に先立ち、以下に樹脂被覆帯の物
性評価方法と開口性の評価方法について簡単に述べる。Prior to the description of the experiments and the examples, the method for evaluating the physical properties of the resin-coated band and the method for evaluating the opening property will be briefly described below.
[開口性の評価] 試験蓋を211径フランジ缶胴と二重巻締めした後、内
容物としてドレッシングツナを充填し、フラット蓋を巻
締め後116℃90分のレトルト処理を施こした場合に
ついて、評価を実施した。[Evaluation of Opening Property] A case in which the test lid is double-wound with the 211-diameter flange canister, and the contents are filled with dressing tuna, and the flat lid is wound, and the retort treatment is performed at 116 ° C. for 90 minutes. , Evaluation was carried out.
評価は次の項目について実施した。The evaluation was conducted on the following items.
(a) 開口力 開封用スコアを未被覆の蓋と比較して、蓋の開きやすさ
が同等に優れているものを○、開封のしづらいものを×
で評価した。(a) Opening force: The score for opening is compared with an uncoated lid, and the one with the same ease of opening the lid is ○, and the one that is difficult to open is ×.
It was evaluated by.
(b) 開口時の安全性 樹脂被覆帯が、開口部端縁を完全に覆う形で蓋の開口が
行われたものを○、開口部端縁が樹脂被覆帯で覆われる
ことなく開口されたものを×で評価した。(b) Safety at the time of opening When the resin-covered strip has the lid opened so as to completely cover the edge of the opening, ○, the edge of the opening was opened without being covered with the resin-coated strip. The thing was evaluated by x.
(c) スコア部の耐食性 蓋を巻締めした缶を、37℃及び80%RHの雰囲気中
に30日間放置した後、開封を行い、スコアの腐食状況
を観察し、スコアに錆の発生の全くないものを○、スコ
アに所々錆の発生のあるものを△、スコア全体に著しく
錆の発生のあるものを×で評価した。(c) Corrosion resistance of score part A can with a closed lid is left in an atmosphere of 37 ° C and 80% RH for 30 days, and then opened to observe the corrosion condition of the score, and rust does not appear in the score. The case where there is no rust was evaluated as ○, the case where rust was generated in some places was evaluated as Δ, and the case where significant rust was generated in the entire score was evaluated as X.
[樹脂被覆帯の物性評価] 開口性の評価を行った同一のロットの開口前の缶蓋につ
き、物性評価を実施した。[Evaluation of Physical Properties of Resin Coated Band] Physical properties of the can lid before opening of the same lot in which the opening property was evaluated were evaluated.
1.接着強度 缶蓋上に塗布、形成された所定巾の樹脂被覆帯又は補強
膜で裏打ちした樹脂被覆帯の一端を塗装板から剥離し、
この一端と塗装板との間で180゜ピールの引張り試験
を行った。引張り試験にはインストロン型引張り試験機
を用い、引張り速度1000mm/min、室温下で測定を行っ
た。各試料につき5回の測定を行い、これらの算術平均
値を1cm巾に換算して接着強度(g/cm)とした。1. Adhesive strength One end of a resin-coated strip of a specified width applied or formed on the can lid or a resin-coated strip backed by a reinforcing film is peeled off from the coating plate,
A 180 ° peel test was conducted between this end and the coated plate. For the tensile test, an Instron type tensile tester was used, and the measurement was performed at a tensile speed of 1000 mm / min and at room temperature. Each sample was measured 5 times, and the arithmetic mean value thereof was converted into a 1 cm width to obtain the adhesive strength (g / cm).
2.強さ 缶蓋上に塗布、形成された所定巾の樹脂被覆を剥離し、
これを引張り速度200mm/min、室温下で試験した。各
試料につき5回の測定を行い、これらの算術平均値を1
cm巾に換算して強さ(g/cm)とした。2. Strength Peel off the resin coating of the specified width applied and formed on the can lid,
This was tested at a pulling speed of 200 mm / min at room temperature. Each sample was measured 5 times, and the arithmetic mean of these was 1
The strength (g / cm) was converted to cm width.
実験1 板厚0.20mmの通常のティンフリースチール(TFS)板
の両面にエポキシ・フェノール系塗料を焼付後の厚さが
5μmになる様に塗布し、210℃で10分間焼付を行
った。この塗装TFS板をプレスを用いて211径用の
蓋に成形し、次いでカール部に常法によりシーリングコ
ンパウンドを塗布乾燥した。次いで蓋の外面側の直径5
8mmの円状に、スコア残厚/鋼板厚さが0.23となる様に
開封用スコアを、またこのスコアと同心で直径54mmの
円状にスコアの開口部巾が0.10mmでスコアのテーパ角度
が130度の第二スコアを形成した。この様にして得ら
れた蓋材の両スコア部分にノズルライニング装置を用い
て回転ライニング法により下記組成の塩ビプラスチゾル
コンパウンドを塗布した後、200℃で2分間加熱し
た。Experiment 1 Epoxy / phenolic paint was applied to both sides of a normal tin-free steel (TFS) plate having a thickness of 0.20 mm so that the thickness after baking would be 5 μm, and baking was performed at 210 ° C. for 10 minutes. This coated TFS plate was molded into a lid for 211 diameter using a press, and then a curling portion was coated with a sealing compound by a conventional method and dried. Then the outer diameter 5 of the lid
The opening score is a circle of 8 mm so that the score remaining thickness / steel plate thickness is 0.23, and the score opening is 0.10 mm and the score taper angle is a circle of 54 mm diameter and concentric with this score. A second score of 130 degrees was formed. A vinyl chloride plastisol compound having the following composition was applied to both score portions of the lid material thus obtained by a rotary lining method using a nozzle lining device, and then heated at 200 ° C. for 2 minutes.
プラスチゾル組成: (重量部) 塩化ビニール樹脂 100部 アセチルクエン酸トリブチル 60部 エポキシ化大豆油 60部 ロジンペンタエリスリットエステル 50部 このように得られた樹脂被覆帯の厚みは0.02mmであり、
開封スコアから外方への突出寸法は1mmであり、開封ス
コア及び第二スコアとも欠陥なく樹脂で被覆されてい
た。最後に厚さ0.35mmの塗装TFS板から作成したタブ
を、スコアから接着支点までの距離が6mm且つ接着支点
部における接着剤層の巾が5mmになる様に、ナイロン1
2系のフィルム状接着剤を用いて220℃で接着した。Plastisol composition: (parts by weight) Vinyl chloride resin 100 parts Tributyl acetyl citrate 60 parts Epoxidized soybean oil 60 parts Rosin pentaerythritol ester 50 parts The thickness of the resin-coated strip thus obtained is 0.02 mm,
The protruding dimension from the open score to the outside was 1 mm, and both the open score and the second score were covered with the resin without any defect. Finally, using a tab made from a coated TFS board with a thickness of 0.35 mm, nylon 1 so that the distance from the score to the adhesive fulcrum is 6 mm and the width of the adhesive layer at the adhesive fulcrum part is 5 mm.
Adhesion was performed at 220 ° C. using a 2 type film adhesive.
次に蓋内面側をエポキシ−フェノール系塗料をスプレー
塗装し、190℃で4分間焼付けた。このようにして得
た易開封性缶蓋を用いて開口性、樹脂被覆帯の物性を評
価した。Next, the inner surface of the lid was spray-painted with an epoxy-phenolic paint and baked at 190 ° C. for 4 minutes. Using the thus obtained easily-openable can lid, the openability and the physical properties of the resin-coated band were evaluated.
実験2 上記実験1において、塗料としてエポキシ変性塩化ビニ
ル樹脂塗料を使用し、塗布用コンパウンドとして下記組
成の塩ビプラスチゾルを使用する以外は実験1と同様に
して缶蓋を製造した。Experiment 2 A can lid was produced in the same manner as in Experiment 1 except that the epoxy modified vinyl chloride resin coating material was used as the coating material and the vinyl chloride plastisol having the following composition was used as the coating compound.
プラスチゾル組成: 塩化ビニル樹脂 100部(重量部) エポキシ化大豆油 35部 実験3 上記実験1において、塗料として実験1と同じエポキシ
・フェノール系塗料を使用し、塗布用コンパウンドとし
て下記組成の塩ピブラスチゾルを使用し、樹脂被覆帯の
厚みを0.01mmとして使用する以外は実験1と同様にして
缶蓋を製造した。Plastisol composition: Vinyl chloride resin 100 parts (parts by weight) Epoxidized soybean oil 35 parts Experiment 3 In the above Experiment 1, the same epoxy-phenolic paint as in Experiment 1 was used as the paint, and salt Piblastisol having the following composition was used as the coating compound. A can lid was manufactured in the same manner as in Experiment 1 except that the thickness of the resin-coated band was 0.01 mm.
プラスチゾル組成: 塩化ビニル樹脂 100部(重量部) アセチルクエン酸トリブチル 60部 エポキシ化大豆油 60部 ロジンペンタエリスリットエステル 70部 実験4 上記実験1において、塗料として、実験1と同じエポキ
シ・フェノール系塗料を使用し、塗布用コンパウンドと
して下記組成の塩ピブラスチゾルを使用する以外は実験
1と同様にして缶蓋を製造した。Plastisol composition: Vinyl chloride resin 100 parts (parts by weight) Acetyl citrate tributyl 60 parts Epoxidized soybean oil 60 parts Rosin pentaerythritol ester 70 parts Experiment 4 In the above Experiment 1, the same epoxy / phenolic paint as in Experiment 1 was used. Was used, and a can lid was manufactured in the same manner as in Experiment 1 except that salt piblastisol having the following composition was used as a coating compound.
プラスチゾル組成: 塩化ビニル樹脂 100部(重量部) エポキシ化大豆油 35部 実験5 上記実験1において、塗料として、実験1と同じエポキ
シ・フェノール系塗料を使用し、塗布用コンパウンドと
して、 ブタジエン・アクリロニトリルコポリマー 100重量部及び トルエン/メチルエチルケトン 200重量部から なる溶液を使用し、54℃の温度で6分間乾燥して使用
する以外は実験1と同様にして缶蓋を製造した。Plastisol composition: Vinyl chloride resin 100 parts (parts by weight) Epoxidized soybean oil 35 parts Experiment 5 In the above Experiment 1, the same epoxy-phenolic paint as in Experiment 1 was used as a paint, and a butadiene-acrylonitrile copolymer was used as a coating compound. A can lid was manufactured in the same manner as in Experiment 1 except that a solution consisting of 100 parts by weight and 200 parts by weight of toluene / methyl ethyl ketone was used and dried for 6 minutes at a temperature of 54 ° C.
以上の結果を表1に示す。The above results are shown in Table 1.
これらの結果から式(1),(2) 及び(3) を満足すること
が、易開口性、安全性及びスコア部耐食性の点で重要な
ことが判る。From these results, it is found that satisfying the formulas (1), (2) and (3) is important in terms of easy opening, safety and corrosion resistance of the score part.
実施例1 板厚0.20mmの通常のティンフリースチール(TFS)板
の両面にエポキシ・フェノール系塗料を焼付後の厚さが
5μmとなるように塗布し、210℃で10分間焼付を
行った。この塗装TFS板をプレスを用いて211径用
の蓋に成形し、次いでカール部に常法によりシーリング
コンパウンドを塗布乾燥した。次いで開封スコアが加工
されるべき部より内側に蓋の中央から直径53mmの円周
状に高さ0.35mmの水平面に対してなす角度が40゜の段
差部を形成した。次いで蓋の外面側にこの段差と同心で
直径58mmの円状に、スコア残厚/鋼板厚さが0.23とな
るように開封用スコアを形成した。このようにして得ら
れた蓋材のスコア部分及び段差部にノズルライニング装
置を用いて回転ライニング法により塩ビプラスチゾルコ
ンパウンドを塗布した後200℃で2分間加熱した。こ
のようにして得られた樹脂被覆帯の厚みは0.03mmであ
り、開封用スコアから外方への突出寸法は2mmであり、
開封スコアから段差部まで樹脂被覆が均等になされてい
た。最後に実施例1と同様に塗装TFSタブ、ナイロン
12系のフィルム状接着剤を用いて220℃で接着し、
タブを蓋に接着固定した。更に内面補正を行い、得た易
開封性缶蓋を用いて開口性、樹脂被覆帯の物性の評価を
行った。結果を表2に示す。 Example 1 An epoxy / phenolic coating was applied to both sides of a normal tin-free steel (TFS) plate having a plate thickness of 0.20 mm so that the thickness after baking was 5 μm, and baking was performed at 210 ° C. for 10 minutes. This coated TFS plate was molded into a lid for 211 diameter using a press, and then a curling portion was coated with a sealing compound by a conventional method and dried. Next, a stepped portion having a diameter of 53 mm from the center of the lid and having an angle of 40 ° with respect to a horizontal plane having a height of 0.35 mm was formed inside the portion to be processed with the opening score. Next, an opening score was formed on the outer surface of the lid in a circular shape having a diameter of 58 mm and being concentric with the step so that the score remaining thickness / steel plate thickness was 0.23. A vinyl chloride plastisol compound was applied to the score portion and the step portion of the thus obtained lid material by a rotary lining method using a nozzle lining device, and then heated at 200 ° C. for 2 minutes. The thickness of the resin-coated band thus obtained was 0.03 mm, and the outward protruding dimension from the opening score was 2 mm,
The resin coating was evenly applied from the opening score to the step. Finally, as in Example 1, a coated TFS tab and a nylon 12 film adhesive were used to bond at 220 ° C.,
The tab was adhesively fixed to the lid. Further, the inner surface was corrected, and the opening property and the physical properties of the resin-coated band were evaluated using the obtained easily-openable can lid. The results are shown in Table 2.
この結果によると、缶蓋の開封用スコアの内側に所定の
形状を有する段差部を設け、樹脂被覆がこの段差部を覆
っており、樹脂被覆帯の物性が特定の範囲である本実施
例の場合には開口にあたり、手のケガがなく安全にしか
も低い力で行うことが可能であった。またスコア部が安
全に樹脂被覆で覆われているので、耐食性に優れている
容器が得られた。 According to this result, a step portion having a predetermined shape is provided inside the opening score of the can lid, the resin coating covers the step portion, and the physical properties of the resin coating band are within a specific range. In this case, it was possible to hit the opening without any injury to the hand and to perform it safely and with a low force. Further, since the score portion is safely covered with the resin coating, a container having excellent corrosion resistance was obtained.
実施例2 板厚0.20mmの通常のティンフリースチール(TFS)板
の両面にエポキシ・フェノール系塗料を焼付後の厚さが
5μmとなるように塗布し、210℃で10分間焼付を
行った。この塗装TFS板をプレスを用いて211径用
の蓋に成形し、次いでカール部に常法によりシーリング
コンパウンドを塗布乾燥した。次いで開封スコアが加工
されるべき部より内側に蓋の中央から直径53mmの円周
状に高さ0.35mmで水平面に対してなす角度が40゜の段
差部を形成した。次いで蓋の外面側にこの段差と同心で
直径58mmの円状に、スコア残厚/鋼板厚さが0.23とな
るように開封用スコアを形成した。またこのスコアと同
心で直径55mmの円状にスコアの開口部幅が0.10mmでス
コアのテーパ角度が130度の第二スコアを形成した。Example 2 An epoxy / phenolic coating was applied to both sides of a normal tin-free steel (TFS) plate having a plate thickness of 0.20 mm so that the thickness after baking was 5 μm, and baking was performed at 210 ° C. for 10 minutes. This coated TFS plate was molded into a lid for 211 diameter using a press, and then a curling portion was coated with a sealing compound by a conventional method and dried. Next, a stepped portion having a diameter of 53 mm, a height of 0.35 mm, and an angle of 40 ° with the horizontal plane was formed from the center of the lid inside the portion where the opening score was to be processed. Next, an opening score was formed on the outer surface of the lid in a circular shape having a diameter of 58 mm and being concentric with the step so that the score remaining thickness / steel plate thickness was 0.23. Further, a second score having a diameter of 55 mm and a score opening angle of 0.10 mm and a taper angle of 130 degrees was formed concentrically with this score.
このようにして得られた蓋材のスコア部分及び段差部に
ノズルライニング装置を用いて回転ライニング法により
塩ビプラスチゾルコンパウンドを塗布した後200℃で
2分間加熱した。このようにして得られた樹脂被覆帯の
厚みは0.10mmであり、開封用スコアから外方への突出寸
法は1.5mm であり、開封スコア周辺から段差部まで樹脂
被覆が均等になされていた。最後に塗装A1タブ、ナイロ
ン12系のフィルム状接着剤を用いて220℃で接着
し、タブを蓋に接着固定した。更に内面補正を行い、易
開封性缶蓋を得た。A vinyl chloride plastisol compound was applied to the score portion and the step portion of the thus obtained lid material by a rotary lining method using a nozzle lining device, and then heated at 200 ° C. for 2 minutes. The thickness of the resin-coated band thus obtained was 0.10 mm, the outward protruding dimension from the opening score was 1.5 mm, and the resin coating was evenly applied from the periphery of the opening score to the step portion. Finally, the coated A1 tab and a nylon 12 type film adhesive were adhered at 220 ° C., and the tab was adhered and fixed to the lid. Further, the inner surface was corrected to obtain an easily-openable can lid.
このようにして得た易開封性缶蓋の樹脂被覆帯の接着強
度は1000g/cm、強さは500g/cmであった。The resin coating strip of the easily-openable can lid thus obtained had an adhesive strength of 1000 g / cm and a strength of 500 g / cm.
本実施例の易開封性缶蓋を211径フランジ缶胴と二重
巻締したのち、内容物としてツナ油漬を充填し、フラッ
ト蓋を巻締後116℃90分のレトルト処理を施した。
これらの易開封性缶蓋について下記の評価を行った。The easily-openable can lid of this example was double-wound with a 211-diameter flange can body, then filled with tuna oil pickled as a content, and after the flat lid was wound, a retort treatment was performed at 116 ° C. for 90 minutes.
The following evaluations were performed on these easily-openable can lids.
[落下試験] 本実施例の缶を各々1000缶、高さ1mからリノリューム
床に横向きに単体落下させた。樹脂被覆体の蓋からの剥
離缶数を調べた。[Drop Test] 1000 cans of this example were dropped from the height of 1 m onto the linoleum floor sideways. The number of peeling cans from the lid of the resin coating was checked.
[輸送試験] 本実施例の缶を各々48缶入りカートン50ケースに収
納し、これらのカートンをトラック便に混載し、東京−
鹿児島間を往復させた。樹脂被覆帯の蓋からの剥離缶数
を調べた。[Transportation Test] The cans of this example were stored in 50 cases each containing 48 cans, and these cartons were mixedly loaded on a truck flight, and the Tokyo-
I made a round trip between Kagoshima. The number of peeling cans from the lid of the resin-coated band was examined.
表3に落下及び輸送試験前後の樹脂被覆帯の蓋から剥離
缶数を示す。Table 3 shows the number of peeled cans from the lid of the resin-coated band before and after the drop and transportation test.
比較例 比較のため、第3−A図に示す通り、塩ビプラスチゾル
コンパウンドを開封スコア及び第二スコアに塗布し、段
差部には塗布しないようにする以外は、実施例2と同様
にして易開封性蓋を製造した。Comparative Example For comparison, as shown in FIG. 3-A, easy-opening was performed in the same manner as in Example 2 except that the PVC plastisol compound was applied to the opening score and the second score and not applied to the step portion. A sex lid was manufactured.
この易開封性蓋についても、実施例2と同様に評価を行
い表3に示した。This easily openable lid was evaluated in the same manner as in Example 2 and is shown in Table 3.
このように缶蓋の開封用スコアの内側に所定の形状を有
する段差部を設け、樹脂被覆がこの段差部を覆っている
本実施例の易開封性蓋は落下或いは輸送試験の後におい
ても樹脂被覆帯の蓋への固定が維持されており、開口に
あたり、手のケガがなく、安全に開口することが可能で
あった。 Thus, the easily openable lid of the present embodiment in which the step portion having the predetermined shape is provided inside the opening score of the can lid and the resin coating covers the step portion is the resin even after the dropping or the transportation test. The covering band was kept fixed to the lid, and there was no hand injury upon opening, and it was possible to open safely.
第1図は本発明の易開封性缶蓋の上面図、 第2図は第1図の缶蓋の線A−A′における側面断面
図、 第3−A図は、樹脂被覆体を開封用スコア及び第二スコ
アのみ設けた蓋の拡大断面図 第3−B図は、本発明の蓋の第2図におけるA−A断面
図、 第4図は開口途中の段階を説明する図である。 1……金属、2……金属素材、3a……外面保護塗膜、
3b……内面保護塗膜、4……外周の周状の溝部、5…
…環状リム部、6……パネル部、7……シーリングコン
パウンド層、8……スコア、9……開口されるべき部
分、10……開口用タブ、11……スコア押裂き用先
端、12……把持部(リング)、13……支点部分、1
4……U字型の切れ目、15……接続部、16……熱可
塑性樹脂接着剤層、17……第二スコア、18……リム
部乃至段差部、19……切断端縁保護用樹脂被覆帯、2
0……外周部、21……切断端縁、22……切断端縁よ
り外方に突出した部分。FIG. 1 is a top view of an easily-openable can lid of the present invention, FIG. 2 is a side sectional view taken along line AA ′ of the can lid of FIG. 1, and FIG. 3A is for opening a resin coating. Enlarged sectional view of the lid provided with only the score and the second score. FIG. 3-B is a sectional view taken along the line AA in FIG. 2 of the lid of the present invention, and FIG. 4 is a diagram for explaining a stage in the middle of opening. 1 ... metal, 2 ... metal material, 3a ... outer surface protective coating,
3b ... Inner surface protective coating, 4 ... Outer circumferential groove, 5 ...
... annular rim portion, 6 ... panel portion, 7 ... sealing compound layer, 8 ... score, 9 ... portion to be opened, 10 ... opening tab, 11 ... score tearing tip, 12 ... ... Gripping part (ring), 13 ... Support point part, 1
4 ... U-shaped cut, 15 ... Connection part, 16 ... Thermoplastic resin adhesive layer, 17 ... Second score, 18 ... Rim part or step part, 19 ... Cutting edge protection resin Coated belt, 2
0 ... outer peripheral portion, 21 ... cutting edge, 22 ... part protruding outward from the cutting edge.
Claims (2)
る開封用スコアと、開口すべき部分に設けられた開封用
タブと、開口すべき部分と缶蓋周辺部との間にスコア上
部にまたがるように設けられた切断端縁保護用樹脂被覆
帯とから成る易開封性缶蓋において、 缶蓋の開口すべき部分も缶蓋周辺部も同一の外面塗膜を
有し、缶蓋の開封用スコアの内側にリム部乃至段差部を
設けると共に、このリム部乃至段差部を覆うように樹脂
被覆帯を設け、樹脂被覆体は、下記式 式中、Aは樹脂被覆帯と蓋との単位幅(cm)当りの接着強
度であり、Tは、樹脂被覆帯の単位幅(cm)当りの強さで
あり、Cは定数(900)である。 を満足する樹脂被覆帯であり、開封に際し、開封用スコ
アより外側の樹脂被覆帯と缶蓋周辺部との間で剥離を生
じ、開口部切断端縁が樹脂被覆帯で覆われた状態で開封
が行われるようにした易開封性缶蓋。1. A score for opening, which defines a portion to be opened provided on a can lid, a tab for opening, which is provided on a portion to be opened, and a score between the portion to be opened and a peripheral portion of the can lid. An easily-openable can lid consisting of a resin coating strip for protecting the cutting edge provided so as to straddle the upper part of the can lid. A rim portion or a step portion is provided inside the opening score of, and a resin coating band is provided so as to cover the rim portion or the step portion. In the formula, A is the adhesive strength per unit width (cm) between the resin coating band and the lid, T is the strength per unit width (cm) of the resin coating band, and C is a constant (900). is there. The resin-covered band that satisfies the above condition, and when opening, peeling occurs between the resin-covered band outside the opening score and the peripheral part of the can lid, and the cut edge of the opening is covered with the resin-covered band. Easy-to-open can lid designed so that
かけては比較的小さい幅で設けられ、スコア上部から開
口すべき部分にかけては前記係合機構に達するように比
較的広い幅で設けられている特許請求の範囲第1項記載
の易開封性缶蓋。2. The resin coating is provided with a relatively small width from the upper part of the score to the peripheral part of the can lid, and is provided with a relatively wide width to reach the engaging mechanism from the upper part of the score to the part to be opened. The easily-openable can lid according to claim 1.
Priority Applications (8)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP61136310A JPH0631091B2 (en) | 1986-06-13 | 1986-06-13 | Easy-to-open can lid that can protect the cutting edge |
US07/188,793 US4887732A (en) | 1986-06-13 | 1987-06-12 | Easy-open lid in which score cut edge can be covered and process for preparation thereof |
DE8787903915T DE3784019T2 (en) | 1986-06-13 | 1987-06-12 | EASY-TO-OPEN CONTAINER LID WITH PROTECTED NOTEL EDGE AND METHOD FOR PRODUCING THE SAME. |
PCT/JP1987/000382 WO1987007581A1 (en) | 1986-06-13 | 1987-06-12 | Easy-to-open can lid able to protect cut edge of score and producing process thereof |
EP87903915A EP0268690B1 (en) | 1986-06-13 | 1987-06-12 | Easy-to-open can lid able to protect cut edge of score and producing process thereof |
AU75171/87A AU597682B2 (en) | 1986-06-13 | 1987-06-12 | Easy-to-open can lid able to protect cut edge of score and producing process thereof |
KR1019880700175A KR920007804B1 (en) | 1986-06-13 | 1987-06-12 | Easy-open lid in which score cut edge can be covered and process for preparation thereof |
DK076288A DK76288A (en) | 1986-06-13 | 1988-02-15 | EASY COLLECTIVE CONTAINER LUCK |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP61136310A JPH0631091B2 (en) | 1986-06-13 | 1986-06-13 | Easy-to-open can lid that can protect the cutting edge |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS6352A JPS6352A (en) | 1988-01-05 |
JPH0631091B2 true JPH0631091B2 (en) | 1994-04-27 |
Family
ID=15172207
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP61136310A Expired - Lifetime JPH0631091B2 (en) | 1986-06-13 | 1986-06-13 | Easy-to-open can lid that can protect the cutting edge |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0631091B2 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4657399A (en) * | 1983-12-23 | 1987-04-14 | Hall Neil R | Color mixture indicator device |
DE3433767A1 (en) * | 1984-07-27 | 1986-01-30 | Basf Ag, 6700 Ludwigshafen | CYCLOHEXENON DERIVATIVES, METHOD FOR THE PRODUCTION THEREOF AND THEIR USE FOR CONTROLLING UNWANTED PLANT GROWTH |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5235242Y2 (en) * | 1971-07-31 | 1977-08-11 | ||
JPS49103777A (en) * | 1973-02-08 | 1974-10-01 |
-
1986
- 1986-06-13 JP JP61136310A patent/JPH0631091B2/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
JPS6352A (en) | 1988-01-05 |
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