JPH0530704B2 - - Google Patents
Info
- Publication number
- JPH0530704B2 JPH0530704B2 JP62237299A JP23729987A JPH0530704B2 JP H0530704 B2 JPH0530704 B2 JP H0530704B2 JP 62237299 A JP62237299 A JP 62237299A JP 23729987 A JP23729987 A JP 23729987A JP H0530704 B2 JPH0530704 B2 JP H0530704B2
- Authority
- JP
- Japan
- Prior art keywords
- lid
- top plate
- plastic
- resin
- skirt
- 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
- 239000004033 plastic Substances 0.000 claims description 59
- 229920003023 plastic Polymers 0.000 claims description 59
- 229910052751 metal Inorganic materials 0.000 claims description 49
- 239000002184 metal Substances 0.000 claims description 49
- 239000002131 composite material Substances 0.000 claims description 39
- 229920005672 polyolefin resin Polymers 0.000 claims description 28
- 238000007789 sealing Methods 0.000 claims description 21
- 239000011342 resin composition Substances 0.000 claims description 19
- 229920005989 resin Polymers 0.000 claims description 14
- 239000011347 resin Substances 0.000 claims description 14
- 150000001735 carboxylic acids Chemical class 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 8
- 238000005452 bending Methods 0.000 claims description 7
- 150000001244 carboxylic acid anhydrides Chemical class 0.000 claims description 5
- 150000001733 carboxylic acid esters Chemical class 0.000 claims description 5
- 238000004519 manufacturing process Methods 0.000 claims description 4
- 150000001734 carboxylic acid salts Chemical class 0.000 claims description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical group O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims 1
- 150000001732 carboxylic acid derivatives Chemical class 0.000 claims 1
- 238000000748 compression moulding Methods 0.000 description 9
- 238000000465 moulding Methods 0.000 description 9
- 230000002093 peripheral effect Effects 0.000 description 8
- 239000000243 solution Substances 0.000 description 8
- 230000001070 adhesive effect Effects 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 238000012545 processing Methods 0.000 description 5
- 238000003860 storage Methods 0.000 description 5
- 229920003002 synthetic resin Polymers 0.000 description 5
- 239000000057 synthetic resin Substances 0.000 description 5
- 239000000853 adhesive Substances 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 229910052782 aluminium Inorganic materials 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 239000003814 drug Substances 0.000 description 3
- 229920001903 high density polyethylene Polymers 0.000 description 3
- 239000004700 high-density polyethylene Substances 0.000 description 3
- 229920000642 polymer Polymers 0.000 description 3
- -1 polypropylene, ethylene -propylene copolymer Polymers 0.000 description 3
- VZCYOOQTPOCHFL-UHFFFAOYSA-N trans-butenedioic acid Natural products OC(=O)C=CC(O)=O VZCYOOQTPOCHFL-UHFFFAOYSA-N 0.000 description 3
- VZCYOOQTPOCHFL-OWOJBTEDSA-N Fumaric acid Chemical compound OC(=O)\C=C\C(O)=O VZCYOOQTPOCHFL-OWOJBTEDSA-N 0.000 description 2
- 239000004743 Polypropylene Substances 0.000 description 2
- OFOBLEOULBTSOW-UHFFFAOYSA-N Propanedioic acid Natural products OC(=O)CC(O)=O OFOBLEOULBTSOW-UHFFFAOYSA-N 0.000 description 2
- 150000001408 amides Chemical class 0.000 description 2
- 244000052616 bacterial pathogen Species 0.000 description 2
- 150000007942 carboxylates Chemical class 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 229940079593 drug Drugs 0.000 description 2
- 238000001990 intravenous administration Methods 0.000 description 2
- VZCYOOQTPOCHFL-UPHRSURJSA-N maleic acid Chemical compound OC(=O)\C=C/C(O)=O VZCYOOQTPOCHFL-UPHRSURJSA-N 0.000 description 2
- 239000011976 maleic acid Substances 0.000 description 2
- 229920001155 polypropylene Polymers 0.000 description 2
- 230000001954 sterilising effect Effects 0.000 description 2
- 238000004659 sterilization and disinfection Methods 0.000 description 2
- 238000012360 testing method Methods 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 1
- JAHNSTQSQJOJLO-UHFFFAOYSA-N 2-(3-fluorophenyl)-1h-imidazole Chemical compound FC1=CC=CC(C=2NC=CN=2)=C1 JAHNSTQSQJOJLO-UHFFFAOYSA-N 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- CERQOIWHTDAKMF-UHFFFAOYSA-N Methacrylic acid Chemical compound CC(=C)C(O)=O CERQOIWHTDAKMF-UHFFFAOYSA-N 0.000 description 1
- 230000003213 activating effect Effects 0.000 description 1
- 150000001336 alkenes Chemical class 0.000 description 1
- 125000000217 alkyl group Chemical group 0.000 description 1
- 150000008064 anhydrides Chemical class 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 125000004432 carbon atom Chemical group C* 0.000 description 1
- 125000002915 carbonyl group Chemical group [*:2]C([*:1])=O 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- LDHQCZJRKDOVOX-NSCUHMNNSA-N crotonic acid Chemical compound C\C=C\C(O)=O LDHQCZJRKDOVOX-NSCUHMNNSA-N 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 150000002148 esters Chemical class 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000001530 fumaric acid Substances 0.000 description 1
- 125000004435 hydrogen atom Chemical group [H]* 0.000 description 1
- 238000001802 infusion Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 229920001684 low density polyethylene Polymers 0.000 description 1
- 239000004702 low-density polyethylene Substances 0.000 description 1
- 239000008155 medical solution Substances 0.000 description 1
- 229920001179 medium density polyethylene Polymers 0.000 description 1
- 239000004701 medium-density polyethylene Substances 0.000 description 1
- LVHBHZANLOWSRM-UHFFFAOYSA-N methylenebutanedioic acid Natural products OC(=O)CC(=C)C(O)=O LVHBHZANLOWSRM-UHFFFAOYSA-N 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011017 operating method Methods 0.000 description 1
- 229920001748 polybutylene Polymers 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- LDHQCZJRKDOVOX-UHFFFAOYSA-N trans-crotonic acid Natural products CC=CC(O)=O LDHQCZJRKDOVOX-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
- B29C43/02—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles
- B29C43/18—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles incorporating preformed parts or layers, e.g. compression moulding around inserts or for coating articles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/56—Stoppers or lids for bottles, jars, or the like, e.g. closures
- B29L2031/565—Stoppers or lids for bottles, jars, or the like, e.g. closures for containers
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Closures For Containers (AREA)
- Medical Preparation Storing Or Oral Administration Devices (AREA)
- Laminated Bodies (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
Description
（産業上の利用分野）
本発明は、例えば注射用薬液や点滴用薬液等の
薬液を収納する容器用の密封蓋として適した、金
属とプラスチツクからなる複合蓋及びその製法に
関するもので、より詳細には、頂板部中央に開口
部を設け、その周囲に固定用スカート部を備えた
軟質金属性内蓋と、該開口部と密封係合し、か
つ、該頂板部と密着した接着性プラスチツク外蓋
とからなる複合蓋及びその製法に関する。
（従来の技術）
従来より注射用薬液や点滴用薬液等の薬液を収
納するための容器の密封用外装蓋が各種提案され
ている。
例えば、特開昭59−142949号公報には、孔部を
形成された天板と、該天板の周縁部から垂下する
スカート部とを有する金属シエルと、該孔部を閉
じるプラスチツク板状体よりなるキヤツプであつ
て、該プラスチツク板状体は、該孔部の内側に開
封のための可除部を画定する薄肉部が形成され、
かつ該可除部には外方に突出した摘み部が１体に
形成されており、該プラスチツク板状体は、その
周辺部が該天板の孔部辺縁部の外面および内面を
挾むようにして押型成形によつて形成されてい
て、該周辺部は該天板の孔部辺縁部に密接してい
ることを特徴とするキヤツプが記載されている。
ここに開示されているキヤツプも、薬液用容器
の密封蓋を意図したものであつて、金属シエルの
天板に形成された孔部を閉じる状態でプラスチツ
ク板状体が配置されており、該プラスチツク板状
体は、その周辺部が、該天板の孔部辺縁部の外面
および内面を挾むようにして形成されているた
め、金属シエルとプラスチツク板状体は孔部辺縁
部で密接され、それらの間にガタツキや隙間がな
く、蒸気滅菌処理や冷却時、又は保管時に埃や雑
菌が入りにくい構造を有している点で、薬液用容
器の密封蓋として評価されるものである。
しかしながら、上記キヤツプは、プラスチツク
板状体が金属シエルの孔部辺縁部においてのみそ
の外面および内面を挾むように密接係合している
だけであつて、金属シエルとプラスチツク板状体
が接着している訳でもないので、通常の蒸気滅菌
処理や保管に際しては密封蓋として一応の機能を
有するものであるが、過酪な各種処理や、運搬等
に際しては、密封性の点で必ずしも十分に満足し
うるものとはいい難い。
また、実開昭54−128859号公報には、密閉ゴム
栓１と金属製口金２とプラスチツク製蓋体３とか
ら成り、蓋体３を指先で開封して金属製口金２の
頂面中央部に穴をあける薬用瓶蓋に於て、プラス
チツク蓋体３の裏面の突出部３Ａを口金２の穴２
Ａに差し込んで突出部３Ａの下端周３Ｂを口金２
の裏面に熔着し、穴２Ａと同心の環状剥切用筋条
２Ｂを穴２Ａの外方に於て口金２に設け、蓋体３
の裾部３Ｃの内面に口金２の裾部２Ｃに圧着する
空気流通遮断用の環状リツプ３Ｄを具えた薬用瓶
蓋が記載されている。
上記薬用瓶蓋においては、予め成形されたプラ
スチツク製蓋体の裏面に設けられた突出部を、金
属製口金の穴に差し込んで、突出部の下端周を口
金の裏面に熔着し、金属製口金とプラスチツク製
蓋体とはその部分においてのみ密接係合し、さら
に口金裾部に圧着するように形成した環状リツプ
で補助的に空気の流通を遮断する構造を有してい
る。
しかしながら、この薬用瓶蓋も前記特開昭59−
142949号公報記載の発明と同様に、過酪な各種処
理や運搬等に際しては密封性に問題があり、薬液
収納容器の密封用外装蓋としては信頼性に欠ける
ものである。
このように、この種容器の外蓋は、殆んどがオ
レフイン系樹脂で成形されており、この樹脂は、
金属とは殆んど接着性を示さないため、従来の複
合蓋は、プラスチツク外蓋の中央下面に、金属製
内蓋の開口部に係合するための突起部を形成して
おき、両者を成形型内にセツトし、加熱されたポ
ンチによつてプラスチツク外蓋の突起部を溶融と
同時に金属製内蓋の開口部周縁に溶着させること
によつて係合部を形成し、両者を密接させていた
ものである。オレフイン系樹脂と金属との接着性
が悪いという技術的認識が前提にある以上、複合
蓋におけるこのような係合は、使用時の開封作業
の容易さとも相俟つて、むしろ当然とられるべき
手段であるということができる。
しかるに、従来提起されている密封用外装蓋
は、いずれも金属蓋とプラスチツク蓋が物理的に
密接係合しているだけで、接着されているもので
はないため蓋周方向には回転するものであり、こ
の回転が度重なると次第に係合部に隙間ができて
しまい雑菌の侵入を許す結果を招き、密封用外装
蓋としての機能を失うに至る。
（発明が解決しようとする問題点）
本発明は、従来の密封用外装蓋における不十分
な密封信頼性を高め、過酪な各種処理や運搬等に
際しても十分な密封信頼性を保持するとともに、
開封に際しては易剥離性を示す程度の密着構造を
有する薬液収納容器等の密封用外装蓋を得ようと
するものである。
（問題点を解決するための手段）
本発明によれば、頂板部と、その周囲の固定用
スカート部と、頂板部中央の開口部とを備えた軟
質金属製内蓋及び内蓋頂板部の上面を覆う大径の
頂板部と、内蓋スカート部の上部外周に位置する
短かいスカート部と、内蓋開口部と密封係合する
離脱可能な係合部とを、備えたプラスチツク外蓋
から成り、該プラスチツク外蓋は、カルボン酸、
カルボン酸無水物、カルボン酸塩、カルボン酸エ
ステル及びカルボン酸アミドに基ずく＝CO基を
10乃至1400ミリモル／100ｇ樹脂の濃度で含有す
る変性オレフイン樹脂乃至樹脂組成物から形成さ
れ、該軟質金属製内蓋と外蓋とは、蓋軸方向には
剥離可能であるが蓋周方向には回転困難であるよ
うに密着されていることを特徴とする金属−プラ
スチツク複合蓋が提供される。
さらに、本発明によれば、頂板部とその周囲の
固定用スカート部と頂板部中央の開口部とを備え
た軟質金属製内蓋を、外蓋頂板部及び外蓋スカー
ト部の外面に対応するキヤビテイ表面を備えた雌
型及び外蓋係合部に対応するキヤビテイ表面を備
えた雄型内に挿着し、カルボン酸、カルボン酸無
水物、カルボン酸塩、カルボン酸エステル及びカ
ルボン酸アミドに基ずく＝CO基を10乃至1400ミ
リモル／100ｇ樹脂の濃度で含有する変性オレフ
イン樹脂乃至樹脂組成物を溶融状態で前記金属製
内蓋と各キヤビテイ表面との間に供給し、前記雄
型のキヤビテイ表面が前記雌型キヤビテイ表面、
よりも低い温度となる温度条件下でプラスチツク
外蓋の成形を行うことを特徴とする金属−プラス
チツク複合蓋の製法が提供される。
（作用）
本発明では、上記軟質金属製内蓋とプラスチツ
ク外蓋とからなる密封用外装蓋において、プラス
チツク外蓋を、カルボン酸、カルボン酸無水物、
カルボン酸塩、カルボン酸エステル及びカルボン
酸アミドに基づく＝CO基を10乃至1400ミリモ
ル／100ｇ樹脂の濃度で含有する変性オレフイン
樹脂乃至樹脂組成物で形成させると、該軟質金属
製内蓋と外蓋とは、蓋軸方向には剥離可能である
が、蓋周方向には回転困難であるように密着され
た密封用外装蓋が得られることが多数の実験の結
果わかつた。該変性オレフイン樹脂乃至樹脂組成
物を、最も好ましくは、溶融状態で金属製内蓋と
各キヤビテイ表面との間に供給し、前記雄型のキ
ヤビテイ表面が前記雌型キヤビテイ表面よりも低
い温度となる温度条件下でプラスチツク外蓋の成
形を行うことにより、前記特性を満足する密封用
外装複合蓋が得られるものであり、それ以外に
も、予め成形されたプラスチツク外蓋を、前記変
性オレフイン樹脂乃至樹脂組成物を接着剤として
金属製内蓋と密着させることによつても目的とす
る複合蓋を得ることができる。
（好適態様の説明）
本発明の複合蓋の断面図の一を示す第１図にお
いて、本発明の複合蓋Ａは、軟質金属製内蓋１と
プラスチツク外蓋７から成つている。金属製内蓋
１は、アルミニウム薄板のような軟質金属板から
形成され、その周囲には薬瓶顎部に固定するため
のスカート部２と、頂板部中央には開口部３が形
成されており、該内蓋頂板部の上面を覆う大径の
頂板部４と、内蓋スカート部２の上部外周に位置
する短いスカート部５と、内蓋開口部３端縁を覆
うように密着された顎部６を有するプラスチツク
外蓋７とからなり、このプラスチツク外蓋７は、
最も好ましくは、前記特定の変性オレフイン樹脂
乃至樹脂組成物を溶融状態で内蓋の上面を覆う形
で供給することによつて、外蓋の成形と同時に内
蓋との密着を達成するものであり、それ以外に
も、予め成形されたプラスチツク外蓋を、前記変
性オレフイン樹脂乃至樹脂組成物を接着剤として
金属製内蓋と密着させることもできる。
内蓋開口部３と外蓋７とは、前述した形状で外
蓋内面の一部が金属製内蓋の開口部端縁を覆い、
かつ、両者の接触部分が前記変性オレフイン樹脂
乃至樹脂組成物で軽接着されることによつて密着
構造を形成するのが最も一般的であるが、内蓋開
口端縁を越えて開口内面に係合部８を形成するよ
うに外蓋を溶融成形させることもできる（第２−
１図および第２−２図）。
いずれにしても、内蓋頂板部は開口部を除いて
全面に亘つてプラスチツク外蓋７内面と良好に密
着され、この密着構造は、蓋周方向には回転困難
であるが、蓋軸方向及びスカート部の外向方向に
対しては剥離可能な程度の密着性を示すものとな
る。
かくして、本発明の複合蓋は、良好な密封信頼
性を保持するとともに、開封に際しての易剥離性
をも併せもつという優れた特徴を有するものであ
る。
また、本発明における変性オレフイン樹脂乃至
樹脂組成物は、曲げ剛性率（ASTM D747）が
7000Kg／cm2以上を有するものであることが必要で
あり、このような樹脂をプラスチツク外蓋として
使用することにより、使用時の離脱性の良好な複
合蓋を得ることが可能となる。すなわち、開封に
際しては、プラスチツク外蓋の周側壁（スカート
部）を上方に押し上げて金属製内蓋から剥離させ
るのであるが、この際、プラスチツク外蓋の曲げ
弾性率が7000Kg／cm2よりも低い場合には、スカー
ト部や蓋の上部が変形し、金属製内蓋からスムー
ズに脱離しない。
さらに、プラスチツク外蓋のスカート部は、金
属製内蓋のスカート部と密着していても、両者の
接着は軽接着であるために離脱しにくいという不
都合はないが、両者は少なくとも頂板部において
密着していることが必要であるが、その他の部分
は、必ずしも全面が密着している必要はなく、両
端スカート部の間に、一定間隔でスリツト状の空
隙部９を形成させてもよい。このようにすること
によつて、両者の密着性を保持したまま、プラス
チツク外蓋の離脱が一層容易になる（第３−１図
および第３−２図）。
本発明においてプラスチツク外蓋を形成する変
性オレフイン樹脂乃至樹脂組成物は、カルボン
酸、カルボン酸無水物、カルボン酸塩、カルボン
酸エステル及びカルボン酸アミドに基ずく＝CO
基を10乃至1400ミリモル／100ｇ樹脂の濃度で含
有するものであることが必要である。
この樹脂乃至樹脂組成物は、金属に対して軽接
着性を示すため、この樹脂によつて外蓋を成形す
ると同時に軟質金属製内蓋頂板部とスカート部を
密着せしめた複合蓋を成形することにより、えら
れた複合蓋は、蓋軸方向には剥離可能であるが、
蓋周方向には回転困難であるような密着構造を形
成するため、過酪な各種処理や運搬等に際しても
十分な密封信頼性を保持するとともに、開封に際
しては易剥離性を示す程度の密着構造を有する薬
液収納容器等の密封用外装蓋を容易に得ることが
できる。
本発明に使用する変性オレフイン樹脂乃至樹脂
組成物としては、式
(Industrial Application Field) The present invention relates to a composite lid made of metal and plastic, suitable as a sealing lid for a container storing a medical solution such as an injection drug or an intravenous drug, and a method for manufacturing the same. has an opening in the center of the top plate, a soft metal inner cover with a fixing skirt around the opening, and an adhesive plastic outer cover that sealingly engages with the opening and is in close contact with the top plate. The present invention relates to a composite lid consisting of a lid and a manufacturing method thereof. (Prior Art) Various types of external lids have been proposed for sealing containers for storing medicinal solutions such as injectable medicinal solutions and intravenous infusion medicinal solutions. For example, JP-A-59-142949 discloses a metal shell having a top plate with a hole formed therein, a skirt portion hanging down from the peripheral edge of the top plate, and a plastic plate-like body that closes the hole. A cap consisting of a plastic plate, wherein a thin wall portion defining a removable portion for opening is formed inside the hole, and
In addition, the removable portion is formed with an outwardly protruding knob portion, and the plastic plate-shaped body is configured such that the peripheral portion thereof sandwiches the outer surface and inner surface of the hole edge portion of the top plate. A cap is described, which is formed by press molding and characterized in that the peripheral portion is in close contact with the edge of the hole in the top plate. The cap disclosed herein is also intended as a hermetically sealed lid for a container for a medicinal solution, and a plastic plate-like member is arranged to close a hole formed in a top plate of a metal shell. The plate-like body is formed so that its peripheral part sandwiches the outer and inner surfaces of the hole edge of the top plate, so the metal shell and plastic plate-like body are brought into close contact with each other at the hole edge, and their It is highly evaluated as a hermetically sealed lid for containers for chemical solutions because it has a structure that prevents dust and germs from entering during steam sterilization, cooling, or storage, with no rattling or gaps between the lids. However, in the above-mentioned cap, the plastic plate is tightly engaged with the metal shell only at the edge of the hole so as to sandwich the outer and inner surfaces of the metal shell, and the metal shell and the plastic plate are bonded together. Therefore, it has a certain function as a sealing lid during normal steam sterilization processing and storage, but the sealing performance may not always be fully satisfied during various types of processing or transportation. It's hard to say that it's worth it. In addition, Japanese Utility Model Publication No. 54-128859 discloses a device consisting of a sealing rubber stopper 1, a metal cap 2, and a plastic lid 3, and the lid 3 is opened with a fingertip to open the center of the top surface of the metal cap 2. When making a hole in a medicinal bottle cap, insert the protrusion 3A on the back side of the plastic cap 3 into the hole 2 in the cap 2.
A and insert the lower end circumference 3B of the protrusion 3A into the base 2.
A circular stripping strip 2B concentric with the hole 2A is provided on the base 2 outside the hole 2A, and the lid body 3
A medicinal bottle cap is described which is provided with an annular lip 3D for blocking air flow, which is pressed onto the inner surface of the hem 3C of the cap 2 and is pressed against the hem 2C of the cap 2. In the above medicinal bottle cap, the protrusion provided on the back side of the pre-formed plastic cap is inserted into the hole of the metal cap, the lower end of the protrusion is welded to the back of the cap, and the metal cap is The cap and the plastic lid are closely engaged only at that portion, and have a structure in which an annular lip is formed to press against the bottom of the cap to supplementally block air circulation. However, this medicinal bottle cap was also
Similar to the invention described in Publication No. 142949, there is a problem in sealing performance during various types of processing or transportation, and it lacks reliability as an external lid for sealing a chemical solution storage container. In this way, the outer lid of this type of container is mostly molded from olefin resin, and this resin is
Since it exhibits almost no adhesive property with metal, conventional composite lids have a protrusion formed on the lower center surface of the plastic outer lid to engage with the opening of the metal inner lid, making it easy to connect the two. The projecting part of the plastic outer cover is melted and simultaneously welded to the periphery of the opening of the metal inner cover by setting it in a mold and using a heated punch to form an engaging part and bringing the two into close contact. This is what I used to do. Given the technical recognition that the adhesion between olefin resin and metal is poor, this type of engagement in composite lids, along with ease of opening during use, is a natural measure that should be taken. It can be said that However, all of the conventionally proposed external sealing lids only have a metal lid and a plastic lid that are physically closely engaged, and are not glued together, so they cannot rotate in the lid circumferential direction. If this rotation is repeated, a gap will gradually form in the engaging portion, allowing the intrusion of germs, and the lid will lose its function as a sealing exterior lid. (Problems to be Solved by the Invention) The present invention improves the insufficient sealing reliability of conventional sealing exterior lids, maintains sufficient sealing reliability even during various types of processing and transportation, etc.
The purpose of this invention is to obtain an external lid for sealing a chemical solution storage container or the like that has a close-tight structure that exhibits easy peelability when unsealed. (Means for Solving the Problems) According to the present invention, the soft metal inner lid and the inner lid top plate are provided with a top plate, a fixing skirt around the top plate, and an opening in the center of the top plate. A plastic outer lid includes a large-diameter top plate portion that covers the top surface, a short skirt portion located on the upper outer periphery of the inner lid skirt portion, and a removable engagement portion that sealingly engages with the inner lid opening. The plastic outer lid is made of carboxylic acid,
Based on carboxylic anhydrides, carboxylates, carboxylic esters and carboxylic amides = CO group
It is formed from a modified olefin resin or resin composition containing a concentration of 10 to 1400 mmol/100 g of resin, and the soft metal inner and outer lids are removable in the axial direction of the lid, but not in the circumferential direction of the lid. A metal-plastic composite lid is provided which is characterized in that it is tightly sealed so that it is difficult to rotate. Further, according to the present invention, the soft metal inner cover, which includes a top plate, a fixing skirt around the top plate, and an opening in the center of the top plate, is adapted to correspond to the outer surface of the outer cover top plate and the outer cover skirt. It is inserted into a female mold with a cavity surface and a male mold with a cavity surface corresponding to the outer lid engaging part, and a compound based on carboxylic acid, carboxylic acid anhydride, carboxylic acid salt, carboxylic acid ester, and carboxylic acid amide A modified olefin resin or resin composition containing CO groups at a concentration of 10 to 1400 mmol/100 g of resin is supplied in a molten state between the metal inner lid and each cavity surface, and is the female cavity surface,
Provided is a method for manufacturing a metal-plastic composite lid, characterized in that the plastic outer lid is formed under temperature conditions that result in a temperature lower than that of the plastic lid. (Function) In the present invention, in the above-mentioned sealing exterior lid consisting of the soft metal inner lid and the plastic outer lid, the plastic outer lid is made of carboxylic acid, carboxylic acid anhydride,
When formed from a modified olefin resin or resin composition containing =CO groups based on carboxylates, carboxylic acid esters, and carboxylic acid amides at a concentration of 10 to 1400 mmol/100 g resin, the soft metal inner lid and outer lid As a result of numerous experiments, it has been found that a sealing exterior lid can be obtained that is removable in the axial direction of the lid, but tightly adhered to the lid in such a way that it is difficult to rotate in the circumferential direction. Most preferably, the modified olefin resin or resin composition is supplied in a molten state between the metal inner lid and each cavity surface, so that the temperature of the male cavity surface is lower than that of the female cavity surface. By molding the plastic outer lid under temperature conditions, a sealing exterior composite lid that satisfies the above characteristics can be obtained.In addition, the pre-formed plastic outer lid can be molded with the modified olefin resin or the above-mentioned modified olefin resin. The desired composite lid can also be obtained by bringing the resin composition into close contact with the metal inner lid using an adhesive. (Description of Preferred Embodiments) In FIG. 1 showing a cross-sectional view of the composite lid of the present invention, the composite lid A of the present invention is composed of an inner lid 1 made of soft metal and an outer lid 7 made of plastic. The metal inner lid 1 is formed from a soft metal plate such as a thin aluminum plate, and has a skirt portion 2 around it for fixing to the jaw of the medicine bottle, and an opening 3 in the center of the top plate. , a large-diameter top plate portion 4 that covers the upper surface of the inner lid top plate portion, a short skirt portion 5 located on the upper outer periphery of the inner lid skirt portion 2, and a chin closely attached to cover the edge of the inner lid opening 3. It consists of a plastic outer cover 7 having a section 6, and this plastic outer cover 7 has the following features:
Most preferably, the particular modified olefin resin or resin composition is supplied in a molten state to cover the upper surface of the inner lid, thereby achieving close contact with the inner lid at the same time as forming the outer lid. In addition to this, a pre-formed plastic outer cover can be brought into close contact with a metal inner cover using the modified olefin resin or resin composition as an adhesive. The inner lid opening 3 and the outer lid 7 have the shapes described above, with a part of the inner surface of the outer lid covering the edge of the opening of the metal inner lid,
In addition, most commonly, a contact structure is formed by lightly adhering the contacting portions of the two with the modified olefin resin or resin composition. The outer lid can also be melt-molded to form the joint 8 (second-
1 and 2-2). In any case, the inner lid top plate is in good contact with the inner surface of the plastic outer lid 7 over the entire surface except for the opening, and this close contact structure makes it difficult to rotate in the lid circumferential direction, but it is difficult to rotate in the lid axial direction and In the outward direction of the skirt portion, it exhibits adhesion to the extent that it can be peeled off. Thus, the composite lid of the present invention has the excellent feature of not only maintaining good sealing reliability but also having easy peelability when opening the lid. Furthermore, the modified olefin resin or resin composition of the present invention has a bending rigidity (ASTM D747) of
It is necessary that the resin has a weight of 7000 Kg/cm 2 or more, and by using such a resin as the plastic outer lid, it is possible to obtain a composite lid with good removability during use. That is, when opening the package, the peripheral side wall (skirt) of the plastic outer cover is pushed upward to separate it from the metal inner cover, but at this time, the plastic outer cover has a bending elastic modulus lower than 7000 kg/ cm2 . In some cases, the skirt portion or the top of the lid may be deformed and cannot be removed smoothly from the metal inner lid. Furthermore, even if the skirt part of the plastic outer cover is in close contact with the skirt part of the metal inner cover, there is no problem that it will be difficult to separate because the adhesive between the two is light, but the two are in close contact at least at the top plate. However, the other parts do not necessarily need to be in close contact with each other over the entire surface, and slit-shaped voids 9 may be formed at regular intervals between the skirt parts at both ends. By doing so, the plastic outer cover can be removed more easily while maintaining the adhesion between the two (FIGS. 3-1 and 3-2). In the present invention, the modified olefin resin or resin composition forming the plastic outer cover is based on carboxylic acid, carboxylic anhydride, carboxylic acid salt, carboxylic acid ester, and carboxylic acid amide=CO
It is necessary that the group be contained in a concentration of 10 to 1400 mmol/100 g resin. Since this resin or resin composition exhibits light adhesion to metal, it is possible to mold the outer lid with this resin and at the same time mold a composite lid in which the soft metal inner lid top plate and skirt portion are brought into close contact. The composite lid obtained by this method can be peeled off in the axial direction of the lid, but
Since the lid has a close-fitting structure that is difficult to rotate in the circumferential direction, it maintains sufficient sealing reliability even during various types of processing and transportation, and has a close-fitting structure that is easy to peel when opened. It is possible to easily obtain a sealing exterior lid for a chemical solution storage container or the like having the following. The modified olefin resin or resin composition used in the present invention has the formula
【式】
（式中、Ｒは水素原子又は炭素数４以下のアル
キル基である。）
のオレフインの重合体又は共重合体、例えば、低
密度、中密度、或いは高密度のポリエチレン、ポ
リプロピレン、エチレン−プロピレン共重合体、
ポリブテン−１、ポリペンテン−１等を幹ポリマ
ーとし、これにアクリル酸、メタクリル酸、クロ
トン酸、マレイン酸、フマル酸、イタコン酸等の
カルボン酸、上記カルボン酸の無水物、塩、エス
テル及びアミドをグラフト変性したもの、或い
は、変性オレフイン樹脂を未変性のオレフイン系
樹脂とブレンドしたものを挙げることができる。
変性オレフイン樹脂乃至樹脂組成物として、
7000Kg／cm2以上の曲げ剛性率を有するものは、変
性する前のオレフイン樹脂或いは変性オレフイン
樹脂をブレンドするオレフイン樹脂として、7000
Kg／cm2以上の曲げ剛性率のオレフイン樹脂を選べ
ばよい。オレフイン樹脂の内、高密度ポリエチレ
ンやポリプロピレンでは、曲げ剛性率が7000Kg／
cm2以上のものが入手し得るので、これを用いれば
よい。
次に、本発明の複合蓋の成形法について説明す
る。
前記複合蓋は、例えば特開昭62−90210号公報
に記載されているような、自体公知の合成樹脂の
圧縮成形装置を用いて成形することができる。
すなわち、本発明の複合蓋は、圧縮成形による
インサート同時成形で十分に密着性にすぐれたも
のが得られるが、頂板部とその周囲の固定用スカ
ート部と頂板部中央の開口部とを備えた軟質金属
製内蓋を、外蓋頂板部及び外蓋スカート部の外面
に対応するキヤビテイ表面を備えた雌型及び外蓋
係合部に対応するキヤビテイ表面を備えた雄型内
に挿着し、前記変性オレフイン樹脂乃至樹脂組成
物を、溶融状態で、前記金属製内蓋と各キヤビテ
イ表面との間に供給し、前記雄型のキヤビテイ表
面が前記雌型キヤビテイ表面よりも低い温度とな
る温度条件下でプラスチツク外蓋の成形を行うこ
とにより、金属製内蓋の頂板部分に密着するプラ
スチツク外蓋部分の成形収縮率を他の部分よりも
小さくすることができ、よつて、金属製内蓋とプ
ラスチツク外蓋とが、一層密着した状態の複合蓋
を得ることができるようになる。
図面を参照して、本発明の複合蓋の成形法の一
例を示す。
第４図乃至第６図は、本発明の複合蓋を圧縮成
型するために使用される圧縮成形装置の一例を示
すものである。
図示の圧縮成形装置は、全体を１０で示す雄型
と、全体を１１で示す雌型を具備している。
雄型は、適宜の支持枠体（図示していない）に
固定された静止部材１２を含んでいる。静止部材
の中央部には、軟質金属製内蓋１３を予めインサ
ートするキヤビテイ１４が設けられており、更に
周方向に適宜の間隔を置いて配設され実質上鉛直
方向に延びるキヤビテイ上端面に達する複数個の
貫通孔１５が設けられ、該貫通孔には、夫々直立
ピン１６が挿入され、ピンの上端は、前記キヤビ
テイ１４の上端面に合致しており、成形後、可動
部材１７によつて実質上鉛直方向へ押し上げられ
ることによつて、成形された複合蓋を金型から外
すエジエクターピンとしての作用をする。
雌型１１は、略円筒形状の可動外側部材１８と
可動内側部材１９とを含んでいる。外側部材１８
の中央部には円形貫通開口２０が形成されてい
る。内側部材１９の上部２１は下部２２に比較し
てやや大径に形成され、その境界段部２３は、内
側部材１９が下降し、圧縮成形する際に外側部材
内面における境界段部２４によつて停止し、成形
品の肉厚を規定する。外側部材１８の外周面下部
２５は下方に向つて幾分先細形状に形成され、雄
型１０における静止部材１２の凹部の周面２６に
対応せしめられている。下部内周面２７は、キヤ
ビテイ１４にインサートされた金属製内蓋１３の
側壁面を、プラスチツク外蓋の肉厚に相当する間
隔をもつて取巻き、その下端は、プラスチツク外
蓋のスカート部の長さを規定する。
内側部材１９の下端面（雌型キヤビテイ）２９
は、プラスチツク外蓋の形状に応じて環状凹部
（或は凸部）などの模様３０が刻設される。
圧縮成形開始前においては、雄型１０および雌
型１１は、第４図に示される状態に位置付けられ
ている。この際、雄型１０のキヤビテイ表面１４
の温度は、雌型１１のキヤビテイ表面２９の温度
よりも低く設定することが必要であり、このよう
に金型の温度を異らせて成形することにより、両
者の密着部分の収縮率が、その他の部分の収縮率
よりも小さくなるため、寸法安定性と密着性にす
ぐれた複合蓋がえられる。
雄型１０のキヤビテイ１４面に、例えばアルミ
ニウムのような軟質金属から成形された内蓋をイ
ンサートし、この上に、所要量の変性オレフイン
樹脂乃至樹脂組成物３１を溶融状態で供給する。
次いで、雄型１０と雌型１１を第５図に示すよう
な前型閉工程に付す。すなわち、雌型１１におけ
る外側部材１８を第５図に示す下限位置まで下降
せしめる。かかる下限位置においては、外側部材
１８の外周面下部２５が静止部材１２の凹部２６
の周面に当接し、外側部材１８は停止する。この
前型閉工程を遂行することにより、雌型１１の外
側部材１８の外周面下部内面２７と、雄型１０に
おける静止部材１２の凹部２６の下端２８とでプ
ラスチツク外蓋のスカート部を規定する空間が形
成される。
前記型閉工程において、雌型１１における内側
部材１９も下降せしめられるが、内側部材１９
は、前記溶融状態の合成樹脂材料３１に実質的な
圧縮作用を加える位置までは下降されないことが
重要である。
次いで、圧縮工程を遂行する。すなわち、第６
図に示すように、雌型１１の内側部材１９を所要
の圧縮力で下降せしめて、合成樹脂材料３０を圧
縮成形する。かくして、雄型における静止部材１
２と、雌型１１の内側部材１９との間に規定され
る型空間部分によつて複合蓋におけるプラスチツ
ク外蓋の天面壁３２及びスカート部３３が、金属
製内蓋１３に密着した状態で形成され、かくし
て、第１図に示す複合蓋がえられるのである。え
られた複合蓋は、金型を開放した後、雄型１０の
静止部材１２に設けられた可動部材１７を作動さ
せることにより、ピンを鉛直方向に押し上げ、金
型から外される。
実施例１，比較例１
マレイン酸で変性した曲げ剛性率が8000Kg／cm2
のポリプロピレン（カルボニル基含有量70ミリモ
ル／100ｇ樹脂、M.T.3、密度0.91）を用い、上
記圧縮成形装置を使用してアルミ製内蓋（厚み
230μm、直径3.3cm開口部の直径1.8cm）との複合
蓋を成形した。
成形条件
雌型温度 40℃
雄型温度 10℃
成形サイクル ３秒
こうして得られた複合蓋を常温にて24時間放置
した後、試料10個について回転トルクメーターに
て、プラスチツク外蓋が回転する時のトルクを測
定したところ、10.0〜12.5（Kg−ｍ）の値を示し
た。
比較のために、特開昭59−142949号公報に記載
された、金属製内蓋とプラスチツク外蓋とが内蓋
の孔部を介して密接している複合蓋についても同
様に回転トルクを測定したとこり、2.0〜3.5（Kg
−ｍ）の値しか示さなかつた。
実施例２，比較例２
プラスチツク外蓋を構成する合成樹脂として、
曲げ剛性率（Kg／cm2、ASTM D747）が、3000、
5000、6000、7000、8000、9000のマレイン酸変性
高密度ポリエチレンを用い、実施例１と同様の方
法で複合蓋を成形した。得られた複合蓋をそれぞ
れ20個宛用い、プラスチツク外蓋の離脱テストを
行つた。表１は、頂板部が変形して良好に離脱が
できなかつた数を表わす。Polymers or copolymers of olefins of [Formula] (wherein R is a hydrogen atom or an alkyl group having 4 or less carbon atoms), such as low-density, medium-density, or high-density polyethylene, polypropylene, ethylene -propylene copolymer,
Polybutene-1, polypentene-1, etc. are used as a backbone polymer, and carboxylic acids such as acrylic acid, methacrylic acid, crotonic acid, maleic acid, fumaric acid, and itaconic acid, anhydrides, salts, esters, and amides of the above carboxylic acids are added to this polymer. Examples include graft-modified resins and blends of modified olefin resins and unmodified olefin resins. As a modified olefin resin or resin composition,
Those with a bending rigidity of 7000Kg/ cm2 or more can be used as olefin resins before modification or as olefin resins blended with modified olefin resins.
It is sufficient to choose an olefin resin with a bending rigidity of Kg/cm 2 or more. Among olefin resins, high-density polyethylene and polypropylene have a bending rigidity of 7000 kg/
Since one having a cm 2 or larger size is available, it is sufficient to use this. Next, a method for forming the composite lid of the present invention will be explained. The composite lid can be molded using a known synthetic resin compression molding apparatus, for example, as described in JP-A-62-90210. That is, the composite lid of the present invention can be obtained with sufficiently excellent adhesion by simultaneous compression molding of inserts, but the composite lid is provided with a top plate, a fixing skirt around the top plate, and an opening in the center of the top plate. Inserting a soft metal inner lid into a female mold having a cavity surface corresponding to the outer surface of the outer lid top plate portion and the outer lid skirt portion, and a male mold having a cavity surface corresponding to the outer lid engaging portion, Temperature conditions in which the modified olefin resin or resin composition is supplied in a molten state between the metal inner lid and each cavity surface, and the temperature of the male cavity surface is lower than that of the female cavity surface. By molding the plastic outer cover below, the molding shrinkage of the plastic outer cover that is in close contact with the top plate of the metal inner cover can be made smaller than that of other parts. It becomes possible to obtain a composite lid in which the plastic outer lid is in even tighter contact. An example of a method for forming a composite lid of the present invention will be described with reference to the drawings. 4 to 6 show an example of a compression molding apparatus used for compression molding the composite lid of the present invention. The illustrated compression molding apparatus includes a male mold, generally designated 10, and a female mold, generally designated 11. The male mold includes a stationary member 12 secured to a suitable support frame (not shown). A cavity 14 is provided in the center of the stationary member, into which a soft metal inner lid 13 is inserted in advance, and the cavity 14 is further arranged at appropriate intervals in the circumferential direction and reaches the upper end surface of the cavity that extends substantially in the vertical direction. A plurality of through holes 15 are provided, and an upright pin 16 is inserted into each of the through holes, the upper end of the pin matches the upper end surface of the cavity 14, and after molding, the vertical pin 16 is inserted by the movable member 17. By being pushed up substantially vertically, it acts as an ejector pin to remove the molded composite lid from the mold. The female mold 11 includes a movable outer member 18 and a movable inner member 19 each having a substantially cylindrical shape. Outer member 18
A circular through opening 20 is formed in the center of the opening. The upper part 21 of the inner member 19 is formed to have a slightly larger diameter than the lower part 22, and the boundary step 23 thereof is stopped by the boundary step 24 on the inner surface of the outer member when the inner member 19 is lowered and compression molded. and specify the wall thickness of the molded product. A lower outer circumferential surface 25 of the outer member 18 is formed into a somewhat tapered shape downward, and corresponds to the circumferential surface 26 of the recessed portion of the stationary member 12 in the male die 10 . The lower inner circumferential surface 27 surrounds the side wall surface of the metal inner cover 13 inserted into the cavity 14 at an interval corresponding to the wall thickness of the plastic outer cover, and its lower end extends along the length of the skirt of the plastic outer cover. Define the Lower end surface (female cavity) 29 of inner member 19
A pattern 30 such as an annular recess (or protrusion) is engraved in accordance with the shape of the plastic outer cover. Before starting compression molding, the male die 10 and the female die 11 are positioned as shown in FIG. 4. At this time, the cavity surface 14 of the male die 10
It is necessary to set the temperature of the cavity surface 29 of the female mold 11 lower than the temperature of the cavity surface 29 of the female mold 11. By molding at different mold temperatures in this way, the shrinkage rate of the part where the two are in close contact with each other can be reduced. Since the shrinkage rate is smaller than that of other parts, a composite lid with excellent dimensional stability and adhesion can be obtained. An inner cover molded from a soft metal such as aluminum is inserted into the cavity 14 surface of the male mold 10, and a required amount of modified olefin resin or resin composition 31 is supplied thereon in a molten state.
Next, the male mold 10 and the female mold 11 are subjected to a front mold closing process as shown in FIG. That is, the outer member 18 of the female mold 11 is lowered to the lower limit position shown in FIG. At this lower limit position, the lower outer peripheral surface 25 of the outer member 18 is in the recess 26 of the stationary member 12.
The outer member 18 stops. By carrying out this pre-mold closing step, the skirt portion of the plastic outer lid is defined by the lower inner surface 27 of the outer peripheral surface of the outer member 18 of the female mold 11 and the lower end 28 of the recess 26 of the stationary member 12 of the male mold 10. A space is formed. In the mold closing step, the inner member 19 in the female mold 11 is also lowered, but the inner member 19
It is important that the molten resin material 31 is not lowered to a position where it applies a substantial compressive action to the molten synthetic resin material 31. Next, a compression process is performed. That is, the sixth
As shown in the figure, the inner member 19 of the female die 11 is lowered with a required compression force to compress and mold the synthetic resin material 30. Thus, the stationary member 1 in the male type
2 and the inner member 19 of the female mold 11, the top wall 32 and skirt portion 33 of the plastic outer cover of the composite lid are formed in close contact with the metal inner cover 13. The composite lid shown in FIG. 1 is thus obtained. After opening the mold, the resulting composite lid is removed from the mold by activating the movable member 17 provided on the stationary member 12 of the male mold 10 to push up the pin in the vertical direction. Example 1, Comparative Example 1 Flexural rigidity modified with maleic acid is 8000Kg/cm 2
polypropylene (carbonyl group content 70 mmol/100 g resin, MT3, density 0.91) was molded using the above compression molding equipment to form an aluminum inner lid (thickness:
A composite lid with an opening diameter of 230 μm and a diameter of 3.3 cm (1.8 cm) was molded. Molding conditions Female mold temperature: 40°C Male mold temperature: 10°C Molding cycle: 3 seconds After the composite lid thus obtained was left at room temperature for 24 hours, 10 samples were measured using a rotating torque meter to determine when the plastic outer lid rotates. When the torque was measured, it showed a value of 10.0 to 12.5 (Kg-m). For comparison, the rotational torque was similarly measured for a composite lid in which a metal inner lid and a plastic outer lid are in close contact with each other through a hole in the inner lid, as described in JP-A No. 59-142949. The weight is 2.0~3.5 (Kg
-m). Example 2, Comparative Example 2 As a synthetic resin constituting the plastic outer lid,
Bending rigidity (Kg/cm 2 , ASTM D747) is 3000,
A composite lid was molded in the same manner as in Example 1 using 5000, 6000, 7000, 8000, and 9000 maleic acid-modified high-density polyethylene. A plastic outer lid release test was conducted using 20 of each of the resulting composite lids. Table 1 shows the number of cases in which the top plate portion was deformed and could not be successfully removed.
【表】
実施例３，比較例３
実施例１と同様の材料を用い、雄型と雌型のキ
ヤビテイ表面の温度を変化させ、複合蓋を成形
し、常温下に24時間放置した後、実施例と同様の
方法で回転トルク数を測定し、その平均値を示し
た。結果を表２に示す。[Table] Example 3, Comparative Example 3 Using the same materials as in Example 1, changing the temperature of the male and female cavity surfaces, molding a composite lid, leaving it at room temperature for 24 hours, and then carrying out the test. The rotational torque number was measured in the same manner as in the example, and the average value is shown. The results are shown in Table 2.
第１図は、本発明の複合蓋の好適な一を示す縦
断面図、第２−１図、および第３−１図は、本発
明の複合蓋の他の好適な例を示す縦断面図であ
り、第２−２図、および第３−２図は、それらの
底面図、第４図乃至第６図は、本発明の複合蓋の
圧縮成形方法を実施するための圧縮成形型装置の
要部とその作動手順を示す。
１……軟質金属製内蓋、２……内蓋スカート
部、３……内蓋中央開口部、４……プラスチツク
外蓋頂板部、５……外蓋スカート部、６……内蓋
開口端縁を覆う外蓋の顎部、７……プラスチツク
外蓋、８……内蓋と外蓋との係合部、９……外蓋
のスカート部に設けたスリツト状空隙部、１０…
…雄型、１１……雌型、１２……雄型の静止部
材、１３……軟質金属製内蓋、１４……雄型キヤ
ビテイ、１５……貫通孔、１６……直立ピン、１
７……雄型可動部材、１８……雌型の可動外側部
材、１９……雌型の可動内側部材、２０……円形
貫通開孔、２３……内側部材の径の段部、２４…
…外側部材の径の段部、２５……雌型外周面下
部、２６……雄型静止部材の凹部周面、２７……
雌型下部内周面、２８……雄型下端部、２９……
雌型キヤビテイ、３０……雌型キヤビテイ面の刻
設部、３１……溶融状態で供給された合成樹脂材
料、３２……外蓋の天面壁、３３……外蓋のスカ
ート部。
FIG. 1 is a longitudinal sectional view showing a preferred example of the composite lid of the present invention, and FIGS. 2-1 and 3-1 are longitudinal sectional views showing other preferred examples of the composite lid of the present invention. 2-2 and 3-2 are bottom views thereof, and FIGS. 4 to 6 are views of a compression molding mold apparatus for carrying out the method of compression molding a composite lid of the present invention. The main parts and their operating procedures are shown. 1...Soft metal inner cover, 2...Inner cover skirt, 3...Inner cover center opening, 4...Plastic outer cover top plate, 5...Outer cover skirt, 6...Inner cover opening end Jaw portion of the outer lid covering the edge, 7... Plastic outer cover, 8... Engagement portion between the inner cover and outer cover, 9... Slit-shaped cavity provided in the skirt portion of the outer cover, 10...
...Male type, 11...Female type, 12...Male stationary member, 13...Soft metal inner cover, 14...Male cavity, 15...Through hole, 16...Upright pin, 1
7...Male type movable member, 18...Female type movable outer member, 19...Female type movable inner member, 20...Circular through hole, 23...Diameter step of inner member, 24...
... Stepped portion in the diameter of the outer member, 25 ... Lower part of the female outer circumferential surface, 26 ... Concave circumferential surface of the male stationary member, 27 ...
Lower inner peripheral surface of female mold, 28... Lower end of male mold, 29...
Female cavity, 30... Engraved portion on female cavity surface, 31... Synthetic resin material supplied in a molten state, 32... Top wall of outer lid, 33... Skirt portion of outer lid.
Claims (1)
頂板部中央の開口部とを備えた軟質金属製内蓋及
び内蓋頂板部の上面を覆う大径の頂板部と、内蓋
スカート部の上部外周に位置する短かいスカート
部と、内蓋開口部と密封係合する離脱可能な係合
部とを、備えたプラスチツク外蓋から成り、 該プラスチツク外蓋は、カルボン酸、カルボン
酸無水物、カルボン酸塩、カルボン酸エステル及
びカルボン酸アミドに基ずく＝CO基を10乃至
1400ミリモル／100ｇ樹脂の濃度で含有する変性
オレフイン樹脂乃至樹脂組成物から形成され、 該軟質金属製内蓋と外蓋とは、蓋軸方向には剥
離可能であるが蓋周方向には回転困難であるよう
に密着されていることを特徴とする金属−プラス
チツク複合蓋。 ２ 前記変性オレフイン樹脂乃至樹脂組成物が、
7000Kg／cm2以上の曲げ剛性率（ASTM D747）
を有する変性オレフイン樹脂乃至樹脂組成物であ
る特許請求の範囲第１項記載の複合蓋。 ３ 頂板部とその周囲の固定用スカート部と頂板
部中央の開口部とを備えた軟質金属製内蓋を、外
蓋頂板部及び外蓋スカート部の外面に対応するキ
ヤビテイ表面を備えた雌型及び外蓋係合部に対応
するキヤビテイ表面を備えた雄型内に挿着し、カ
ルボン酸、カルボン酸無水物、カルボン酸塩、カ
ルボン酸エステル及びカルボン酸アミドに基ずく
＝CO基を10乃至1400ミリモル／100ｇ樹脂の濃度
で含有する変性オレフイン樹脂乃至樹脂組成物を
溶融状態で前記金属製内蓋と各キヤビテイ表面と
の間に供給し、前記雄型のキヤビテイ表面が前記
雌型キヤビテイ表面よりも低い温度となる温度条
件下でプラスチツク外蓋の成形を行うことを特徴
とする金属−プラスチツク複合蓋の製法。[Claims] 1. A top plate portion, a fixing skirt portion around the top plate portion,
A soft metal inner lid with an opening in the center of the top plate, a large-diameter top plate that covers the upper surface of the inner lid top plate, a short skirt located on the upper outer periphery of the inner lid skirt, and an inner lid opening. a plastic outer cap having a releasable engagement portion in sealing engagement with the plastic outer cap, the plastic outer cap having a releasable engagement portion in sealing engagement with the plastic cap; Zuku = CO group from 10 to
It is formed from a modified olefin resin or resin composition containing a concentration of 1400 mmol/100 g resin, and the soft metal inner and outer lids can be peeled off in the axial direction of the lid, but are difficult to rotate in the lid circumferential direction. A metal-plastic composite lid, characterized in that the metal-plastic composite lid is tightly adhered so as to be. 2 The modified olefin resin or resin composition is
Bending rigidity of 7000Kg/cm2 or more (ASTM D747)
The composite lid according to claim 1, which is a modified olefin resin or resin composition having the following. 3. A soft metal inner cover comprising a top plate, a fixing skirt around the top plate, and an opening in the center of the top plate, and a female mold with a cavity surface corresponding to the outer surface of the outer cover top plate and the outer cover skirt. It is inserted into a male mold with a cavity surface corresponding to the outer lid engaging part, and contains 10 to 10 carbon dioxide groups based on carboxylic acids, carboxylic acid anhydrides, carboxylic acid salts, carboxylic acid esters, and carboxylic acid amides. A modified olefin resin or resin composition containing a concentration of 1400 mmol/100 g resin is supplied in a molten state between the metal inner lid and each cavity surface, so that the male cavity surface is lower than the female cavity surface. A method for manufacturing a metal-plastic composite lid, characterized in that the plastic outer lid is formed under temperature conditions where the temperature is also low.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62237299A JPS6484858A (en) | 1987-09-24 | 1987-09-24 | Metal-plastic composite cap and manufacture thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62237299A JPS6484858A (en) | 1987-09-24 | 1987-09-24 | Metal-plastic composite cap and manufacture thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6484858A JPS6484858A (en) | 1989-03-30 |
| JPH0530704B2 true JPH0530704B2 (en) | 1993-05-10 |
Family
ID=17013307
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62237299A Granted JPS6484858A (en) | 1987-09-24 | 1987-09-24 | Metal-plastic composite cap and manufacture thereof |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6484858A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100437911B1 (en) * | 2001-06-21 | 2004-06-30 | 장재원 | Structure for sealing of vial with flip-off type cap and manufacturing method thereof |
| WO2015162572A2 (en) * | 2014-04-23 | 2015-10-29 | Sacmi Cooperativa Meccanici Imola Societa' Cooperativa | Method and apparatus for obtaining an object and an object having a cup-shaped body |
-
1987
- 1987-09-24 JP JP62237299A patent/JPS6484858A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6484858A (en) | 1989-03-30 |
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