JPH01213167A - Metal-plastic composite lid and its manufacture - Google Patents
Metal-plastic composite lid and its manufactureInfo
- Publication number
- JPH01213167A JPH01213167A JP63031723A JP3172388A JPH01213167A JP H01213167 A JPH01213167 A JP H01213167A JP 63031723 A JP63031723 A JP 63031723A JP 3172388 A JP3172388 A JP 3172388A JP H01213167 A JPH01213167 A JP H01213167A
- Authority
- JP
- Japan
- Prior art keywords
- lid
- top plate
- metal
- inner lid
- plastic
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
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- 239000005060 rubber Substances 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 231100000241 scar Toxicity 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 229920002050 silicone resin Polymers 0.000 description 1
- 239000000344 soap Substances 0.000 description 1
- APSBXTVYXVQYAB-UHFFFAOYSA-M sodium docusate Chemical group [Na+].CCCCC(CC)COC(=O)CC(S([O-])(=O)=O)C(=O)OCC(CC)CCCC APSBXTVYXVQYAB-UHFFFAOYSA-M 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000003784 tall oil Substances 0.000 description 1
- 229920005992 thermoplastic resin Polymers 0.000 description 1
- 239000005029 tin-free steel Substances 0.000 description 1
- 239000005028 tinplate Substances 0.000 description 1
- 239000004408 titanium dioxide Substances 0.000 description 1
- 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 1
- LDHQCZJRKDOVOX-UHFFFAOYSA-N trans-crotonic acid Natural products CC=CC(O)=O LDHQCZJRKDOVOX-UHFFFAOYSA-N 0.000 description 1
- 238000011282 treatment Methods 0.000 description 1
- 229940087291 tridecyl alcohol Drugs 0.000 description 1
- 229920006337 unsaturated polyester resin Polymers 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
- 239000010698 whale oil Substances 0.000 description 1
- 239000001052 yellow pigment Substances 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
- 239000011787 zinc oxide Substances 0.000 description 1
- 235000014692 zinc oxide Nutrition 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
- 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
- B29C43/32—Component parts, details or accessories; Auxiliary operations
- B29C43/36—Moulds for making articles of definite length, i.e. discrete articles
-
- 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
- B29C43/32—Component parts, details or accessories; Auxiliary operations
- B29C43/50—Removing moulded articles
- B29C2043/503—Removing moulded articles using ejector pins, rods
-
- 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)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
Abstract
Description
【発明の詳細な説明】
（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′Ｍ蓋として適した、金属とプラス
チッ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金属製内蓋と、該開口部と密封
係合し、且つ、該頂板部と密着したプラスチック外蓋と
から成る複合蓋及びその製法に関する。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a composite material made of metal and plastic that is suitable as an airtight lid for a container containing a medical solution such as an injection drug or an intravenous drug. It relates to a lid and its manufacturing method, and more specifically, a metal inner lid having an opening in the center of the top plate and a fixing skirt around the opening, which sealingly engages with the opening, and The present invention relates to a composite lid consisting of a top plate portion and a plastic outer lid in close contact with each other, and a method for manufacturing the same.
（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
めの容器の冨封用外装蓋が各種提案されている。(Prior Art) Various types of external lids for sealing containers for storing medicinal solutions such as injectable medicinal solutions and intravenous medicinal solutions have been proposed.
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ェルと、該孔部を閉じるプラスチ
ック板状体よりなるキャンプであって、該プラスチック
板状体は、該孔部の内側に開封のための可除部を画定す
る薄肉部か形成され、且つ該可除部には外方に突出した
摘み部が一体に形成されており、該プラスチック板状体
は、その周辺部が該天板の孔部辺縁部の外面及び内面を
挟むようにして押型成形によって形成されていて、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
するキャップが記載されている。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 member that closes the hole. The plastic plate-like body has a thin-walled part defining a removable part for opening the seal inside the hole, and the removable part has a knob part protruding outward. are integrally formed, and the plastic plate-like body is formed by press molding so that its peripheral portion sandwiches the outer and inner surfaces of the hole edge of the top plate, and the peripheral portion is A cap is described which is characterized in that it is in close contact with the periphery of the hole.
ここに開示されているキャップも、薬液用容器の密封蓋
を意図したものであって、金属シェルの天板に形成され
た孔部を閉じる状態でプラスチック板状体が配置されて
おり、該プラスチック板状体は、その周辺部が、該天板
の孔部辺縁部の外面及び内面を挟むようにして形成され
ているため、金属シェルとプラスチック板状体は孔部辺
縁部で密接され、それらの間にガタッキや隙間がなく、
蒸気滅菌処理や冷却時、また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。The cap disclosed herein is also intended as a hermetically sealed lid for a container for liquid medicine, and a plastic plate-like body is arranged to close a hole formed in the top plate of a metal shell. Since 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, the metal shell and the plastic plate-like body are brought into close contact with each other at the hole edge, and their There is no backlash or gap between the
It has a structure that prevents dust and germs from entering during steam sterilization, cooling, or storage, making it highly valued as a sealing lid for containers for chemical solutions.
しかしながら、上記キャップは、プラスチック板状体が
金属シェルの孔部辺縁部においてのみその外面及び内面
を挟むように密接係合しているだけであって、金属シェ
ルとプラスチッ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、過酷な各種処理や、運
搬等に際しては、密封性の点で必ずしも十分に満足し得
るものとは言い難い。However, in the above-mentioned cap, the plastic plate-like body is only closely engaged with the metal shell 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-like body are not 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 be fully satisfied during various harsh processing or transportation. It's hard to say what you get.
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とプラスチック製蓋体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
穴を開ける薬用瓶蓋において、プラスチック蓋体３の裏
面の突出部３Ａを口金２の穴２Ａに差し込んで突出部３
Ａの下端周３Ｂを口金２の裏面に熔着し、穴２Ａと同心
の環状剃切用筋条２Ｂを穴２Ａの外方において口金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ップ３Ｄを備えた薬用瓶
蓋が記載されている。In addition, Japanese Utility Model Application 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 remove the central part of the top surface of the metal cap 2. In a medicine bottle lid with a hole in it, insert the protruding part 3A on the back side of the plastic lid body 3 into the hole 2A of the cap 2 and remove the protruding part 3.
The lower end circumference 3B of A is welded to the back surface of the cap 2, an annular shaving strip 2B concentric with the hole 2A is provided on the cap 2 outside the hole 2A, and the cap is attached to the inner surface of the hem 3C of the lid body 3. A medicinal bottle lid is described that is equipped with an annular lip 3D for blocking air circulation, which is crimped onto the hem 2C of the medicine bottle.
上記薬用瓶蓋においては、予め成形されたプラスチック
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ック製蓋体とはその部分においての
み密接係合し、更に口金裾部に圧着するように形成した
環状リップで補助的に空気の流通を遮断する構造を有し
ている。In the above medicinal bottle lid, the protrusion provided on the back side of the pre-formed plastic lid body is inserted into the hole of the metal cap, the lower end of the protrusion is welded to the back surface of the cap, and the metal cap is The cap and the plastic lid are closely engaged only at that portion, and the annular lip is formed to press against the bottom of the cap to supplementally block air flow.
しかしながら、この薬用瓶蓋も前記特開昭５９−１４２
９４９号公報記載の発明と同様に、過酷な各種処理や運
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。However, this medicinal bottle lid is also
Similar to the invention described in Japanese Patent No. 949, there is a problem in sealing performance during various harsh treatments and transportation, and it lacks reliability as an exterior lid for sealing a chemical solution storage container.
このように、この種の容器の外蓋は、殆どがオレフィン
系樹脂で成形されており、この樹脂は、金属とは殆ど接
着性を示さないため、従来の複合蓋は、プラスチック外
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ットし、加
熱されたポンチによってプラスチッ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
よって係合部を形成し、両者を密接させていたものであ
る。オレフィ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って、むし
ろ当然ということができる。In this way, most of the outer lids of this type of container are molded from olefin resin, and this resin has almost no adhesive properties with metal, so conventional composite lids are A protrusion is formed on the bottom surface to engage with the opening of the metal inner lid, and both are set in a mold, and a heated punch melts the protrusion on the plastic outer lid and simultaneously forms the metal. An engaging portion is formed by welding to the periphery of the opening of the inner lid, and the two are brought into close contact with each other. Given the technical recognition that the adhesion between olefin resin and metal is poor, this type of engagement in composite lids is rather natural, as it makes it easier to open the lid during use. can.
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ック蓋が物理的に電接係合している
だけで、接着されているものではないため蓋周方向に回
転したり、少しの外力が加わると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。However, in all of the conventionally proposed external sealing lids, the metal lid and the plastic lid are only physically electrically engaged with each other, and are not glued together, so they cannot rotate in the lid circumferential direction. When a small amount of external force is applied, a gap is created in the engaging portion, allowing the intrusion of germs and causing the lid to lose its function as a sealing exterior lid.
（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、過酷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。(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 harsh processing and transportation, and also maintains sufficient sealing reliability when opened. In this case, an attempt is made to obtain an exterior lid for sealing a chemical solution storage container, etc., which has a close contact structure that exhibits easy peelability.
（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ック
外蓋から成り、該プラスチック外蓋は５％未満の成形収
縮率（ＡＳＴＮ Ｄ ９５５）と６０００乃至１３００
０Ｋｇ／ｃｎ＋２の曲げ剛性率（ＡＳＴＭ Ｄ ７４７
）とを有するプラスチックから成り、該金属製内蓋は少
なくとも頂板部上面に凝集破壊性密着剤含有塗料層を有
し、該プラスチック外蓋は前記凝集破壊性密着剤含有塗
料層を介して内蓋に対して蓋軸方向に剥離可能に密着し
ていることを特徴とする金属−プラスチック複合蓋が提
供される。(Means for Solving the Problems) According to the present invention, the metal inner lid includes a top plate, a fixing skirt around the top plate, and an opening in the center of the top plate, and the upper surface of the inner lid top plate. It consists of a plastic outer lid having a large diameter top plate portion that covers the inner lid skirt portion, 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. Plastic outer lid has mold shrinkage of less than 5% (ASTN D 955) and 6000 to 1300
Bending rigidity of 0Kg/cn+2 (ASTM D 747
), the metal inner lid has a paint layer containing a cohesive failure adhesive on at least the upper surface of the top plate, and the plastic outer lid is coated with the inner lid through the paint layer containing a cohesive failure adhesive. A metal-plastic composite lid is provided, which is characterized in that it is in close contact with the lid in a peelable manner in the axial direction of the lid.
本発明によれば更に、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、且つ少なくとも頂
板部上面に凝集破壊性密着剤含有塗料層を設けた金属製
内蓋を、外蓋頂板部及び外蓋スカート部の外面に対応す
るキャビティ表面を備えた雌型及び外蓋係合部に対応す
るキャビティ表面を備えた雄型内に挿着し、５％未満の
成形収縮率（ＡＳＴＭＤ９５５）と６０００乃至１３ｏ
ｏ。According to the present invention, the metal inner lid is further provided with a top plate, a fixing skirt around the top plate, and an opening in the center of the top plate, and a coating layer containing a cohesive failure adhesive is provided on at least the top surface of the top plate. , inserted into a female mold with a cavity surface corresponding to the outer surface of the outer lid top plate part and the outer lid skirt part, and a male mold with a cavity surface corresponding to the outer lid engaging part, and molding shrinkage of less than 5%. rate (ASTMD955) and 6000 to 13o
o.
Ｋｇ／ｃｍ２ ｃ７）曲げ剛性率（ＡＳＴＭ Ｉ］ ７
４７）とを有するプラスチックを溶融状態で前記金属製
内蓋と各キャビティ表面との間に供給し、前記雄型のキ
ャビティ表面が前記雌型キャビティ表面よりも低い温度
となる温度条件下でプラスチック外蓋の成形を行うこと
を特徴とする金属−プラスチック複合蓋の製法が提供さ
れる。Kg/cm2 c7) Flexural rigidity (ASTM I) 7
47) is supplied in a molten state between the metal inner lid and the surface of each cavity, and the outer surface of the plastic is supplied under temperature conditions such that the male cavity surface has a lower temperature than the female cavity surface. A method of manufacturing a metal-plastic composite lid is provided, which comprises molding the lid.
（作 用）
本発明による金属−プラスチック複合蓋は、（ｉ）外蓋
か５％未満、特に３％未満の成形収縮率と、６０００乃
至１３０００ Ｋｇ／ｃｍ２、特に７０００乃至１１０
００ Ｋｇ／ｃｍ２の曲げ合成率とを有すること、
（１１）金属製内蓋が少なくとも頂板部上面に凝集破壊
性密着剤含有塗料層を有すること、（ｉｉｉ）プラスチ
・ンク外蓋が凝集破壊性密着剤含有塗料層を介して内蓋
に対して蓋軸方向に剥離可能に密着していること
に特徴を有する。(Function) The metal-plastic composite lid according to the present invention has (i) a molding shrinkage rate of less than 5%, especially less than 3% in the outer lid, and a molding shrinkage rate of 6000 to 13000 Kg/cm2, especially 7000 to 110 kg/cm2.
(11) The metal inner lid has a coating layer containing a cohesive failure adhesive on at least the top surface of the top plate; (iii) The plastic outer lid has a cohesive failure resistance. It is characterized in that it is in close contact with the inner lid through an adhesive-containing paint layer so that it can be peeled off in the axial direction of the lid.
即ち、本発明の複合蓋では、外蓋と内蓋とが雑菌や水分
の侵入を防止し、目−つ偶発的な脱落が防止されるよう
に十分な信頼性を持って密着されているが、外蓋を指で
」三方に押上げると比較的小さな開口力で容易に開封が
行われる。That is, in the composite lid of the present invention, the outer lid and the inner lid are tightly attached with sufficient reliability to prevent the intrusion of bacteria and moisture and to prevent the eyes from falling off accidentally. If you push the outer lid up in three directions with your fingers, it can be opened easily with a relatively small opening force.
上記（ｉ）の成形収縮率及び曲げ剛性率は、蓋の易開口
性と密接に関連する。外蓋プラスチックの成形収縮率が
上記範囲よりも大きいと、内蓋スカート部と外蓋スカー
ト部との間にタガ締力が作用し、開口力が異状に大きく
なり、易開封性が低下する。また外蓋の曲げ剛性率が前
記範囲を越えて犬きくなると、内蓋頂板部」二面と外蓋
内面との接着剥離が全面同時剥離となるため開口力が異
状に大きくなり、またこの曲げ剛性率が前記範囲よりも
小さくなると、外蓋押」−げ力か外蓋頂板部に十分に伝
達されなく、いずれも易開封性が低下する。本発明にお
いては、成形収縮率が上記の小さい範囲にあるプラスチ
ックで構成することにより、タガ締力を低減させて、外
蓋の上方へのズラシを有効に行うことが可能となると共
に、開口時に外蓋頂板部に押上げ力を十分に伝達させな
がら、外蓋頂板部に適度な反りを与えて、一端部からの
剥離を進行させて易開封性を達成することができる。The molding shrinkage rate and bending rigidity in (i) above are closely related to the ease of opening of the lid. If the molding shrinkage rate of the outer lid plastic is larger than the above range, a hoop tightening force will act between the inner lid skirt portion and the outer lid skirt portion, the opening force will become abnormally large, and the ease of opening will decrease. In addition, if the bending rigidity of the outer cover exceeds the above range and becomes too stiff, the adhesive peeling between the two surfaces of the top plate of the inner cover and the inner surface of the outer cover will occur simultaneously on the entire surface, resulting in an abnormally large opening force. If the rigidity is smaller than the above range, the pushing force of the outer cover will not be sufficiently transmitted to the outer cover top plate, and the ease of opening will deteriorate in both cases. In the present invention, by constructing the plastic with a molding shrinkage rate within the above-mentioned small range, it is possible to reduce the hoop clamping force and effectively shift the outer cover upward, and when opening the outer cover, While sufficiently transmitting a pushing force to the outer lid top plate, the outer lid top plate can be appropriately warped to promote peeling from one end, thereby achieving easy opening.
金属製内蓋頂板部上面に凝集破壊性密着剤含有塗料を設
けることは、外蓋と内蓋との間に雑菌や水分の侵入を防
止し、且つ両者の偶発的な離脱を防止しながら、しかも
開口力を低減させて易開封性能を向上させるのに役立つ
。凝集破壊性密着剤とは、文言から明白な通り、塗膜と
プラスチックの密着性（接着性）を高めるのには役立つ
が、それ自体の凝集力が比較的小Ｓく、剥離に際して、
それ自体容易に凝集破壊を生じる材料を言う。Providing a paint containing a cohesive failure adhesive on the top surface of the metal inner lid top plate prevents bacteria and moisture from entering between the outer lid and the inner lid, and prevents accidental separation of the two. Moreover, it is useful for reducing opening force and improving easy-opening performance. As is clear from the wording, cohesive failure adhesives are useful for increasing the adhesion (adhesiveness) between paint films and plastics, but their own cohesive force is relatively small, and when peeled off,
A material that easily causes cohesive failure.
本発明においては、この凝集破壊性密着剤を含有する塗
膜を介して内蓋と外蓋とが密着することにより、上記構
成（ｉ）と相俟って、開口力を易開封性のレベル、即ち
６００乃至１５００ｇ、特に８００乃至１３００ｇの範
囲とすることができる。In the present invention, the inner lid and the outer lid are brought into close contact with each other through the coating film containing the cohesive failure adhesive, and in combination with the above configuration (i), the opening force is reduced to the level of easy opening. , ie in the range from 600 to 1500 g, in particular from 800 to 1300 g.
（好的態様の説明）
本発明の複合蓋の断面図の−・例を示す第１図において
、本発明の複合蓋Ａは、金属製内蓋１とプラスチック外
蓋１０から成っている。金属製内蓋１は、アルミニウム
薄板のような金属板から形成され、頂板部２と、その周
囲には薬瓶顎部に固定するためのスカート部３と、頂板
部中央には開口部４が形成されており、外ＭＩＯは該内
蓋頂板部の上面を覆う大径の頂板部１１と、内蓋スカー
ト部３の上部外周に位置する短いスカート部１２と、内
蓋開口部４端縁を覆うように密着された顎部１３を有す
る。(Description of Preferred Embodiments) In FIG. 1 showing an example of a cross-sectional view of a composite lid of the present invention, a composite lid A of the present invention consists of a metal inner lid 1 and a plastic outer lid 10. The metal inner lid 1 is formed from a metal plate such as a thin aluminum plate, and includes a top plate portion 2, a skirt portion 3 around the top plate portion 3 for fixing to the medicine bottle jaw, and an opening 4 in the center of the top plate portion. The outer MIO includes a large-diameter top plate portion 11 that covers the upper surface of the inner lid top plate portion, a short skirt portion 12 located on the upper outer periphery of the inner lid skirt portion 3, and an edge of the inner lid opening 4. It has a jaw part 13 which is tightly fitted so as to cover it.
内蓋１の頂板部２の上面には、凝集破壊性密着剤含有塗
膜５が設けられ、この塗膜５を介してプラスチック外蓋
１０が内蓋に密着している。この塗膜５は頂板部２の上
面にのみ設けてもよいし、更にスカート部３の側面にも
設けてもよい。A coating film 5 containing a cohesive failure adhesive is provided on the upper surface of the top plate portion 2 of the inner lid 1, and the plastic outer lid 10 is in close contact with the inner lid via this coating film 5. This coating film 5 may be provided only on the upper surface of the top plate portion 2, or may also be provided on the side surface of the skirt portion 3.
プラスチック外ＭＩＯは、前述した範囲の成形収縮率と
曲げ剛性率とを有するプラスチックで製造される。この
外蓋１ｏは、最も好ましくは、前記特定のプラスチック
を溶融状態で内蓋の上面を覆う形で供給することによっ
て、外蓋の成形と同時に内蓋との密着を達成するもので
ある。The non-plastic MIO is manufactured from a plastic having mold shrinkage and flexural rigidity within the ranges described above. Most preferably, the outer cover 1o is formed by supplying the specific plastic in a molten state so as to cover the upper surface of the inner cover, thereby achieving close contact with the inner cover at the same time as forming the outer cover.
内蓋開口部４と外蓋ｌＯ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、且つ、両者の
接触部分が前記変性オレフィン樹脂乃至樹脂組成物で軽
接着されることによっ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
１４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図）。The inner lid opening 4 and the outer lid lO 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, and a contact portion between the two being made of the modified olefin resin or resin composition. The most common method is to form a close contact structure by lightly bonding the inner lid, but the outer lid can also be melt-molded so as to form an engaging portion 14 on the inner surface of the opening beyond the edge of the opening of the inner lid. (Figure 2).
外蓋は、種々のプラスチック、例えば、ポリエチレン、
ポリプロピレン、プロピレン−エチレン共重合体、プロ
ピレン−ブテン１共重合体等のオレフィン系樹脂：アク
リロニトリル−スチレン−ブタジェン（ＡＢＳ）樹脂；
耐衝撃性スチレン樹脂；アクリル樹脂；ナイロン系樹脂
；ポリエステル樹脂：ポリカーボネート樹脂等の任意の
樹脂から形成される。The outer lid can be made of various plastics, such as polyethylene,
Olefin resins such as polypropylene, propylene-ethylene copolymer, propylene-butene 1 copolymer: acrylonitrile-styrene-butadiene (ABS) resin;
It is formed from any resin such as impact-resistant styrene resin; acrylic resin; nylon resin; polyester resin: polycarbonate resin.
外蓋を構成するプラスチックの成形収縮率及び曲げ剛性
率は、樹脂の種類と充填剤の配合量とに関係する。樹脂
の種類により成形収縮率はまちまちであり、例えば低密
度ポリエチレンは大きく、ポリプロピレンはこれより低
く、ポリカーボネートは著しく小さい。したがって、本
発明においては、樹脂単味で成形収縮率及び曲げ剛性率
が上記範囲内にあればこれを用いることができる。また
、樹脂中に充填剤を含有させると、その配合量の増大に
伴って、成形収縮率は減少し且つ曲げ剛性率は増大する
ようになる。かくして、樹脂の種類を選び、或は更に充
填剤の配合量を選ぶことにより、所期の成形収縮率と曲
げ剛性率とを得ることができる。価格及び成形性の点で
好的な樹脂は高密度ポリエチレン及びポリプロピレンで
ある。The molding shrinkage rate and bending rigidity of the plastic forming the outer lid are related to the type of resin and the amount of filler added. The molding shrinkage rate varies depending on the type of resin; for example, low density polyethylene has a high molding shrinkage rate, polypropylene has a lower molding shrinkage rate, and polycarbonate has a significantly lower molding shrinkage rate. Therefore, in the present invention, a single resin can be used if its molding shrinkage rate and bending rigidity are within the above ranges. Furthermore, when a filler is included in the resin, the molding shrinkage rate decreases and the flexural rigidity increases as the amount of filler increases. In this way, by selecting the type of resin or further selecting the blending amount of filler, it is possible to obtain the desired molding shrinkage rate and bending rigidity. Preferred resins in terms of cost and moldability are high density polyethylene and polypropylene.
無機充填剤としては、ルチル型またはアナターゼ型の二
酸化チタン、亜鉛華、グロスホワイト等の無機白色顔料
：パライト、沈降性硫酸パライト、炭酸カルシウム、石
膏、沈降性シリカ、エアロジル、タルク、焼成或は未焼
成りレイ、炭酸バリウム、アルミナホワイト、合成乃至
天然のマイカ、合成ケイ酸カルシウム、炭酸マグネシウ
ム、炭酸バリウム等の白色体質顔料；カーボンブラック
、マグネタイト等の黒色顔料：ベンガラ等の赤色顔料：
シエナ等の黄色顔料；群青、コバルト青等の青色顔料を
挙げることができるが、本発明に使用し得る無機フィラ
ーは上に例示したものに限定されない。Examples of inorganic fillers include rutile-type or anatase-type titanium dioxide, zinc white, inorganic white pigments such as gloss white, pallite, precipitated pallite sulfate, calcium carbonate, gypsum, precipitated silica, aerosil, talc, calcined or untreated. White extender pigments such as fired ray, barium carbonate, alumina white, synthetic or natural mica, synthetic calcium silicate, magnesium carbonate, barium carbonate; Black pigments such as carbon black and magnetite; Red pigments such as red iron:
Examples include yellow pigments such as sienna; and blue pigments such as ultramarine and cobalt blue; however, the inorganic fillers that can be used in the present invention are not limited to those exemplified above.
これらの無機フィラーは、樹脂中への分散が容易に且つ
一様に行われるように、その平均粒径が０．０５乃至２
０ｐｍの範囲にあるのが良く、また絞り成形性の点では
、比重が２．０乃至９．０の範囲にあるのが望ましい。These inorganic fillers have an average particle size of 0.05 to 2, so that they can be easily and uniformly dispersed in the resin.
The specific gravity is preferably in the range of 0 pm, and from the viewpoint of drawing formability, the specific gravity is preferably in the range of 2.0 to 9.0.
更に、隠蔽性やバリヤー性の点では、ＪＩＳ Ｋ−５
１０１による隠蔽力が５０ ｃ＋ｎ２／ｇ以上のもので
ある。好適な無機フィラーはタルク、炭酸カルシウムで
ある。Furthermore, in terms of concealment and barrier properties, JIS K-5
101 has a hiding power of 50 c+n2/g or more. Suitable inorganic fillers are talc and calcium carbonate.
無機フィラーの充填量は、樹脂基準で３乃至３０重量％
、特に５乃至２０重量％の範囲内にあることが望ましい
。The filling amount of inorganic filler is 3 to 30% by weight based on the resin.
It is particularly desirable that the amount is in the range of 5 to 20% by weight.
内蓋を構成する金属板としては、純アルミニウム或はア
ルミニウム合金から形成された軟質金属板や、ブリキ、
ティンフリースチール、ニンケルメッキ板等の表面処理
鋼板が使用され、その厚みは一般に０．１５乃至０．３
ｍｍ、特に０．２乃至０．２５ ｍｍの範囲内にある
のが良い。The metal plate constituting the inner lid may be a soft metal plate made of pure aluminum or aluminum alloy, tin plate,
Surface-treated steel plates such as tin-free steel and nickel plated plates are used, and their thickness is generally 0.15 to 0.3.
mm, preferably within the range of 0.2 to 0.25 mm.
凝集破壊性密着剤としてはこれに限定されないが、次の
ものが使用される。Although the cohesive failure adhesive is not limited thereto, the following can be used.
１、脂肪族炭化水素系
合成パラフィン
石油系ワックス
ペトロラタム
２、脂肪酸、脂肪族アルコール
高級脂肪酸
動物または植物油脂から得られた脂肪酸及びそれらの脂
肪酸を水素添加したもので、炭素数が８〜２２のもの
ヒドロキシステアリン酸
直鎖脂肪族−価アルコール
動物または植物油脂またはそれらの脂肪酸エステルを還
元または天然ロウな分解蒸留して得られる炭素数４以上
のもの
トリデシルアルコール
３６ ポリグリコール
ポリエチレングリコール
分子量２００〜９５００のもの
ポリプロピレングリコール
分子量１０００以上のもの
ポリオキシプロピレン−ポリオキシエチレン−ブロック
重合体
分子量１９００〜９０００のもの
４゜ アマイド、アミン
高級脂肪酸アマイド
オレイルパルミトアマイド
ステアリルエルカミド
２ステアロミドエチルステアレート
エチレンビス脂肪酸アマイド
ＮＮ”オレオイルステアリルエチレンジアミン
ＮＮ’ビス（２ヒドロキシエチル）アルキル（０１２〜
０１８）アマイド
ＮＮ’ビス（ヒドロキシエチル）ラウロアマイド
Ｎアルキル（Ｃ１６〜Ｃ＋ｓ））リメチレンジアミンと
反応したオレイン酸
脂肪酸ジェタノールアミン
ジ（ヒドロキシエチル）ジエチレントリアミンモノアセ
テートのジステアリン酸エステル
５、−価、多価アルコールの脂肪酸エステルステアリン
酩ｎ−ブチル
水添ロジンメチルエステノ？
セパチン酸ジブチルくｎ−ブチル〉
セパチン酸ジオクチル
く２エチルヘキシル、ｎ−オキチル共〉グリセリン脂肪
酸エステル
グリセリンラクトステアリル
ペンタエリスリトールのステアリン酸工ステルペ
ンタエリスリトールテトラステアレートソルビタン
ポリエチレングリコール脂肪酸エステルポリエチレング
リコールモノステアレート
ポリエチレングリコールジラウレート
ポリエチレングリコールモノオレエートポリエチレンタ
ルコールジオレエート
ポリエチレングリコールヤシ脂肪酸エステル
ポリエチレングリコールトール油脂肪酸エステル
エタンジオールモンタン酸エステル
１、３ブタンジオールモンタン酸エステル
ジエチレングリコールステアリン酸エステル
プロピレングリコール脂肪酸エステル
６、 １−リグリセライト、ワックス水添食用油脂
１２−ヒドロオキシステアリン酸のグリセリンエステル
水添魚油
牛 脂
スパームアセチワンクス
モンタンワックス
カルナ八ワックス
密 蝋
木 蝋
一価脂肪族アルコールと脂肪族飽和酸エステル
く例：硬化鯨油ラウリルステアレート、ステアリルステ
アレート〉
７、高級脂肪酸のアルカリ金属、アルカリ土類金属、亜
鉛及びアルミニウムの塩（金属石鹸）
８、低分子量オレフィン樹脂
低分子量ポリエチレン
低分子量ポリプロピレン
醇化ポリエチレン
低分子量酸変性オレフィン樹脂
９、 その他
プロピレングリコールアルギネート
ジアルキルケトンアクリルコポリマー
（例えばモンサント社製モダフロー等）。1. Aliphatic hydrocarbon-based synthetic paraffin petroleum wax petrolatum 2. Fatty acids, fatty alcohols Higher fatty acids Fatty acids obtained from animal or vegetable oils and hydrogenated fatty acids with 8 to 22 carbon atoms. Hydroxystearic acid Straight-chain aliphatic-hydric alcohol Alcohol with 4 or more carbon atoms obtained by reduction or decomposition distillation of animal or vegetable oils or their fatty acid esters Tridecyl alcohol 36 Polyglycol Polyethylene glycol Molecular weight 200-9500 Polypropylene glycol Polyoxypropylene-polyoxyethylene block polymers with a molecular weight of 1,000 or more Polyoxypropylene-polyoxyethylene block polymers with a molecular weight of 1,900 to 9,000 4 Amide, amine Higher fatty acid amide Oleyl palmitamide Stearyl erucamide 2-stearomide Ethyl stearate Ethylene bis fatty acid Amide NN"Oleoylstearylethylenediamine NN'bis(2hydroxyethyl)alkyl (012~
018) Amide NN' bis(hydroxyethyl) lauroamide N alkyl (C16-C+s)) distearic acid ester of oleic acid fatty acid jetanolamine di(hydroxyethyl) diethylenetriamine monoacetate reacted with rimethylene diamine 5, -valent, polyvalent Alcohol fatty acid ester stearin n-butyl hydrogenated rosin methyl ester? Dibutyl sepatate, n-butyl> Dioctyl sepatate, 2-ethylhexyl, n-oxytyl> Glycerin fatty acid ester glycerin lactostearyl pentaerythritol stearic acid sterpentaerythritol tetrastearate sorbitan polyethylene glycol fatty acid ester polyethylene glycol monostearate polyethylene glycol Dilaurate Polyethylene glycol monooleate Polyethylene talcol dioleate Polyethylene glycol Coco fatty acid ester Polyethylene glycol Tall oil fatty acid ester Ethanediol Montanic acid ester 1,3 Butanediol Montanic acid ester Diethylene glycol Stearic acid ester Propylene glycol fatty acid ester 6, 1- Liglycerite, wax Hydrogenated edible fats and oils Glycerin ester of 12-hydroxystearic acid Hydrogenated fish oil Beef fat Sparmacetiwanx Montan wax Carna 8 waxes Wax Monohydric aliphatic alcohols and aliphatic saturated acid esters Examples: Hydrogenated whale oil Lauryl stearate, stearyl stearate> 7. Higher fatty acid alkali metal, alkaline earth metal, zinc and aluminum salts (metal soap) 8. Low molecular weight olefin resin Low molecular weight polyethylene Low molecular weight polypropylene Softened polyethylene Low molecular weight acid-modified olefin resin 9. Other propylene glycol alginate dialkyl ketone acrylic copolymers (for example, Modaflow manufactured by Monsanto, etc.).
凝集破壊性密着剤を配合する塗料は、金属との密着性と
耐腐食性とに優れたものが好ましい。このような塗料は
、熱硬化性樹脂塗料、例えば、フェノール−ホルムアル
デヒド樹脂、フラン−ホルムアルデヒド樹脂、キシレン
−ホルムアルデヒドｍ 脂、ケトン−ホルムアルデヒド
樹脂、尿素ホルムアルデヒド樹脂、メラミン−ホルムア
ルデヒド樹脂、アルキド樹脂、不飽和ポリエステル樹脂
、エポキシ樹脂、ビスマレイミド樹脂、トリアリルシア
ヌレート樹脂、熱硬化性アクリル樹脂、シリコーン樹脂
、油性樹脂、或は熱可塑性樹脂塗料、例えば、塩化ビニ
ル−酢酸ビニル共重合体、塩化ビニル−マレイン酎共重
合体、塩化ビニル−マレイン耐ー酢酸ヒニル共重合体、
アクリル重合体、飽和ポリエステル樹脂等を挙げること
ができる。The paint containing the cohesive failure adhesive is preferably one that has excellent adhesion to metals and corrosion resistance. Such paints include thermosetting resin paints, such as phenol-formaldehyde resins, furan-formaldehyde resins, xylene-formaldehyde resins, ketone-formaldehyde resins, urea-formaldehyde resins, melamine-formaldehyde resins, alkyd resins, unsaturated polyester resins, etc. Resin, epoxy resin, bismaleimide resin, triallyl cyanurate resin, thermosetting acrylic resin, silicone resin, oil-based resin, or thermoplastic resin coating, such as vinyl chloride-vinyl acetate copolymer, vinyl chloride-maleic resin copolymer, vinyl chloride-malein-resistant-hinyl acetate copolymer,
Examples include acrylic polymers and saturated polyester resins.
これらの樹脂塗料は単独でも２種以上の組合わせでも使
用される。These resin coatings may be used alone or in combination of two or more.
好適な塗料は、エポキシ−フェノール系塗料のように、
エポキシ樹脂成分とこれに対する硬化剤樹脂成分とから
成る塗料である。Suitable paints include epoxy-phenolic paints, such as
It is a paint consisting of an epoxy resin component and a curing agent resin component for the epoxy resin component.
凝集破壊性密着剤は塗料樹脂固形分出たり０．５乃至１
５重量％、特に１．０乃至１０重量％の範囲で用いるの
がよい。また塗膜の厚みは、一般に１、０乃至１ ５
ｇｍ、特に１．５乃至１０ｐｍの範囲にあるのがよい。The cohesive failure adhesive has a coating resin solid content of 0.5 to 1.
It is preferably used in an amount of 5% by weight, particularly in the range of 1.0 to 10% by weight. The thickness of the coating film is generally 1.0 to 1.5
gm, particularly preferably in the range of 1.5 to 10 pm.
塗料中に配合された凝集破壊性密着剤は、塗料の焼付乃
至乾燥時に塗膜表面に浮上し、塗膜とプラスチックとを
凝集破壊可能に富着させる作用を行う。The cohesive failure adhesive compounded in the paint floats to the surface of the paint film when the paint is baked or dried, and has the effect of enriching the paint film and plastic to enable cohesive failure.
尚、プラスチックがオレフィン系樹脂から成る場合には
、上記塗料中に変性オレフィン樹脂を配合して、密着性
の程度を調節することができる。If the plastic is made of an olefin resin, the degree of adhesion can be adjusted by blending a modified olefin resin into the paint.
この目的に使用する変性オレフィン樹脂乃至樹脂組成物
としては、式
ＣＨ＝ＣＨ
式中、Ｒは水素原子または炭素数４以下のアルキル基で
ある。The modified olefin resin or resin composition used for this purpose has the formula CH=CH where R is a hydrogen atom or an alkyl group having 4 or less carbon atoms.
のオレフィンの重合体または共重合体、例えば、低雀度
、中密度、或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、或は
、変性オレフィン樹脂を未変性のオレフィン系樹脂とブ
レンドしたものを挙げることができる。Polymers or copolymers of olefins, such as low-density, medium-density, or high-density polyethylene, polypropylene, ethylene-propylene copolymers, polybutene-1, polypentene-1, etc., are used as the backbone polymer, and Acrylic acid, methacrylic acid, crotonic acid, maleic acid, fumaric acid,
Carboxylic acids such as itaconic acid, anhydrides of the above carboxylic acids,
Examples include graft-modified salts, esters, and amides, and blends of modified olefin resins and unmodified olefin resins.
この変性樹脂の内、低分子量のものは、凝集破壊性密着
剤となるが、高分子量ものでも、凝集破壊性密着剤と該
変性オレフィン樹脂とを１：２乃至ｌ：２０、特に１：
４乃至１：１５の重量比で用いることができる。Among these modified resins, those with a low molecular weight become cohesive failure adhesives, but even high molecular weight ones, the ratio of the cohesive failure adhesive and the modified olefin resin is 1:2 to 1:20, especially 1:1.
A weight ratio of 4 to 1:15 can be used.
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、前記材料を用いる点景外は例えば特開昭６２
−９０２１０号公報に記載されているような、それ自体
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。Next, a method for forming the composite lid of the present invention will be explained. The composite lid is made of the material described in Japanese Patent Application Laid-open No. 62, for example.
It can be molded using a known synthetic resin compression molding apparatus such as that described in Japanese Patent No. 90210.
即ち、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優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、前記塗膜が設けられた金属製内蓋を、外蓋頂
板部及び外蓋スカート部の外面に対応するキャビティ表
面を備えた雌型及び外蓋係合部に対応するキャビティ表
面を備えた雄型内に挿着し、前記変性オレフィン樹脂乃
至樹脂組成物を、溶融状態で、前記金属製内蓋と各キャ
ビティ表面との間に供給し、前記雄型のキャビティ表面
が前記雌型キャビティ表面よりも低い温度となる温度条
件下でプラスチッ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ック外蓋部分の成
形収縮率を他の部分よりも小さくすることができ、よっ
て、金属製内蓋とプラスチック外蓋とが、−層密着した
状５ｍの複合、＜７を得ることができるようになる。That is, the composite lid of the present invention can be obtained with sufficiently excellent adhesion by simultaneous molding of inserts by compression molding. The metal inner lid provided with the coating film is made 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. The modified olefin resin or resin composition is supplied in a molten state between the metal inner cover and the surface of each cavity, so that the surface of the male cavity is lower than the surface of the female cavity. By molding the plastic outer lid under low temperature conditions, the molding shrinkage rate of the plastic outer lid part that is in close contact with the top plate of the metal inner lid can be made smaller than that of other parts, and therefore, It becomes possible to obtain a composite with a thickness of 5 m in which the metal inner lid and the plastic outer lid are in close contact with each other.
図面を参照して、本発明の複合蓋の成形法の一例を示す
。An example of a method for forming a composite lid of the present invention will be described with reference to the drawings.
第３図乃至第５図は、本発明の複合蓋を圧縮成形するた
めに使用される圧縮成形装置の一例を示すものである。3 to 5 show an example of a compression molding apparatus used for compression molding the composite lid of the present invention.
図示の圧縮成形装置は、全体を１５で示す雌型と、全体
を１６で示す雄型を具備している。The illustrated compression molding apparatus includes a female mold, generally designated 15, and a male mold, generally designated 16.
雌型は、適宜に支持枠体（図示していない）に固定され
た静止部材１７を含んでいる。静止部材の中央部には、
軟質金属製内蓋１８を予めインサートするキャビティ１
９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ャビティ上端面に達
する複数個の貫通孔２０が設けられ、該貫通孔には、そ
れぞれ直立ピン２１が挿入され、ピンの上端は、前記キ
ャビティ１９の上端面に合致しており、成形後、可動部
材２２によって実質上鉛直方向へ押上げられることによ
って、成形された複合蓋を金型から外すエジェクタービ
ンとしての作用をする。The female mold includes a stationary member 17 suitably fixed to a support frame (not shown). In the center of the stationary member,
Cavity 1 into which soft metal inner lid 18 is inserted in advance
9, and a plurality of through holes 20 which are arranged at appropriate intervals in the circumferential direction and which extend substantially vertically and reach the upper end surface of the cavity, each of which has an upright pin. 21 is inserted, the upper end of the pin matches the upper end surface of the cavity 19, and after molding, the molded composite lid is removed from the mold by being pushed up substantially in the vertical direction by the movable member 22. Acts as an ejector turbine.
雄型１６は、略円筒形状の可動外側部材２３と可動内側
部材２４とを含んでいる。外側部材２３の中央部には円
形貫通開口２５が形成されている。該貫通開口２５の上
部２６は下部２７に比較してやや大径に形成され、その
境界段部２８は、内側部材２４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２９によって停止、
成形品の肉厚を規定する。外側部材２３の外周面下部３
０は下方に向かって幾分先細形状に形成され、雌型１５
における静止部材１７の凹部の周面３１に対応せしめら
れている。下部内周面３２は、キャビティ１９にインサ
ートされた金属製内蓋１８の側壁面を、プラスチック外
蓋の肉厚に相当する間隔をもって取巻き、その下端３３
は、プラスチック外蓋のスカート部の長さを規定する。The male mold 16 includes a movable outer member 23 and a movable inner member 24 having a substantially cylindrical shape. A circular through opening 25 is formed in the center of the outer member 23. The upper part 26 of the through opening 25 is formed to have a slightly larger diameter than the lower part 27, and the boundary step 28 thereof is stopped by the boundary step 29 on the inner surface of the outer member when the inner member 24 is lowered and compression molded.
Specify the wall thickness of the molded product. Lower part 3 of outer peripheral surface of outer member 23
0 is formed into a somewhat tapered shape toward the bottom, and the female mold 15
This corresponds to the circumferential surface 31 of the concave portion of the stationary member 17 in . The lower inner peripheral surface 32 surrounds the side wall surface of the metal inner lid 18 inserted into the cavity 19 at an interval corresponding to the thickness of the plastic outer lid, and the lower end 33
defines the length of the skirt of the plastic outer lid.
内側部材２４の下端面（雄型キャビティ）３４は、プラ
スチック外蓋の形状に応じて環状凹部（或は凸部）など
の模様３５が刻設される。The lower end surface (male cavity) 34 of the inner member 24 is engraved with a pattern 35 such as an annular recess (or protrusion) depending on the shape of the plastic outer lid.
圧縮形成開始前においては、雌型１５及び雄型１６は、
第３図に示される状態に位置付けられている。この際、
雄型１６のキャビティ表面３４の温度は、雌型１５のキ
ャビティ表面１９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ならせて成形するこ
とにより、両者の密着部分の収縮率が、その値の部分の
収縮率よりも小さくなるため、寸法安定性と密着性に優
れた複合蓋が得られる。Before the start of compression molding, the female mold 15 and the male mold 16 are
It is positioned as shown in FIG. On this occasion,
It is necessary to set the temperature of the cavity surface 34 of the male mold 16 lower than the temperature of the cavity surface 19 of the female mold 15, and by molding the molds at different temperatures in this way, the close contact between the two can be improved. Since the shrinkage rate of the portion is smaller than the shrinkage rate of the portion having the same value, a composite lid with excellent dimensional stability and adhesion can be obtained.
雌型１５のキャビティ１９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
の七に、所要量の変性オレフィン樹脂乃至樹脂組成物３
６を溶融状態で供給する。An inner lid molded from a soft metal such as aluminum is inserted into the cavity 19 surface of the female mold 15, and a required amount of modified olefin resin or resin composition 3 is inserted into the cavity 19 of the female mold 15.
6 is supplied in a molten state.
Ｖひ）で、雌型１５と雄型１６を第４図に示すような前
型閉工程に伺す。即ち、雄型１６における外側部材２３
を第４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２３の外周面下部３０が静止
部材１７の凹部３１の周面に当接し、外側部材２３は停
止する。この前型閉工程を遂行することにより、雄型１
６の外側部材２３の外周面下部内面３２と、雌型１５に
おける静止部材１７の凹部３１の下端３３とでプラスチ
ック外蓋のスカート部を規定する空間が形成される。At VH), the female mold 15 and the male mold 16 are brought into the front mold closing process as shown in FIG. That is, the outer member 23 in the male mold 16
is lowered to the lower limit position shown in FIG. At this lower limit position, the lower outer peripheral surface 30 of the outer member 23 comes into contact with the peripheral surface of the recess 31 of the stationary member 17, and the outer member 23 stops. By performing this pre-mold closing process, the male mold 1
The lower inner surface 32 of the outer peripheral surface of the outer member 23 of No. 6 and the lower end 33 of the recess 31 of the stationary member 17 in the female mold 15 form a space that defines the skirt portion of the plastic outer lid.
前記型閉工程において、雄型１６における内側部材２４
も下降せしめられるが、内側部材２４は、前記溶融状態
の合成樹脂材料３６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。In the mold closing step, the inner member 24 in the male mold 16
Although the inner member 24 is also lowered, it is important that the inner member 24 is not lowered to a position where it exerts a substantial compressive action on the molten plastic material 36.
次いで、圧縮工程を遂行する。即ち、第５図に示すよう
に、雄型１６の内側部材２４を所要の圧縮力で下降せし
めて、合成樹脂材料３５を圧縮成形する。かくして、雌
型における静止部材１７と、雄型１６の内側部材２４と
の間に規定される型空間部分によって複合蓋におけるプ
ラスチック外蓋の天面壁３７及びスカー）・部３８が、
金属製内蓋１８に密着した状態で形成され、かくして、
第１図に示す複合蓋が得られるのである。得られた複合
蓋は、金型を開放した後、雌型１５の静止部材１７によ
り設けられた可動部材２２を作動させることにより、ピ
ンを鉛直方向に押上げ、金型から外される。Next, a compression process is performed. That is, as shown in FIG. 5, the inner member 24 of the male mold 16 is lowered with a required compressive force to compress and mold the synthetic resin material 35. Thus, the mold space defined between the stationary member 17 in the female mold and the inner member 24 of the male mold 16 allows the top wall 37 and scar part 38 of the plastic outer lid in the composite lid to
It is formed in close contact with the metal inner lid 18, and thus,
The composite lid shown in FIG. 1 is obtained. After opening the mold, the resulting composite lid is removed from the mold by activating the movable member 22 provided by the stationary member 17 of the female mold 15 to push the pin upward in the vertical direction.
（実施例）
実施例１
凝集破壊性密着剤としてマレイン酸変性ポリプロピレン
を３．０ＰＨＲ、ジアクリルケトン−アクリルコポリマ
ー（モンサンド社製モタフロー）を０．２ ＰＨＲ（マ
レイン酸変性ポリプロピレン／モタフロー−１５／１）
を添加したエポキシフェノール塗料を塗布した板厚０．
２３ｍｍのアルミ板を打抜いて直径２０ｍｍ、開口部の
穴径８）の内蓋を作成した。(Example) Example 1 As a cohesive failure adhesive, maleic acid-modified polypropylene was used at 3.0 PHR, and diacrylic ketone-acrylic copolymer (Motaflow, manufactured by Monsando) was used at 0.2 PHR (maleic acid-modified polypropylene/Motaflow-15/1). )
Plate thickness 0.0mm coated with epoxyphenol paint added with
An inner cover with a diameter of 20 mm and an opening hole diameter of 8) was prepared by punching out a 23 mm aluminum plate.
次に第３図に示す装置を用いてタルク２０％を含み、曲
げ剛性率１１０００ Ｋｇ／ｃｍ２、成形収縮率１．２
％のポリプロピレン樹脂と前記内蓋との複合蓋を作成し
た。成形条件は以下の通りである。Next, using the apparatus shown in Fig. 3, a material containing 20% talc, a bending rigidity of 11000 Kg/cm2, and a molding shrinkage rate of 1.2.
% polypropylene resin and the inner lid was created. The molding conditions are as follows.
雌型温度 ８０°Ｃ
雄型温度 ２０°Ｃ
成形サイクル ３秒
こうして得られた複合蓋をレトルト殺菌後、浸透液によ
り内蓋と外蓋境界面の電封性評価を行ったところ、液の
浸透は全くなく密封性は完全であつた・
次にこの複合蓋の開封性を評価するため内蓋と外蓋の引
剥力を測定したところ、１．０〜１．２ Ｋｇの値を示
し、良好な易開封性を有していた。Female mold temperature: 80°C Male mold temperature: 20°C Molding cycle: 3 seconds After retort sterilization of the composite lid obtained in this way, the electrical sealing property of the interface between the inner lid and the outer lid was evaluated using a penetrating liquid. The sealing performance was perfect.Next, in order to evaluate the unsealability of this composite lid, the peeling force of the inner lid and outer lid was measured, and it showed a value of 1.0 to 1.2 kg. It had good ease of opening.
比較例１
実開昭５４−１２８８５９号公報に記載の複合蓋につい
て、実施例１と同様の浸透液テストを実施したところ、
内蓋と外蓋の境界面に液の浸透が見られ、密封性が不十
分であった。Comparative Example 1 The same penetrating liquid test as in Example 1 was conducted on the composite lid described in Japanese Utility Model Application Publication No. 54-128859.
Liquid penetration was observed at the interface between the inner lid and outer lid, and the sealing performance was insufficient.
比較例２
実施例１における塗料をマレイン酸変性ポリプロピレン
８．０ ＰＨＲ（７，４重量％）のみ含むエポキシフェ
ノール塗料に変更した以外は実施例１と全く同様に作成
した複合蓋を開封試験に供したところ４．５ Ｋｇの開
封力を示し、易開封性の範囲をはるかに越えていた。Comparative Example 2 A composite lid was prepared in the same manner as in Example 1, except that the paint in Example 1 was changed to an epoxy phenol paint containing only maleic acid-modified polypropylene 8.0 PHR (7.4% by weight), and subjected to an unsealing test. As a result, the opening force was 4.5 kg, far exceeding the range of easy opening.
第１図は、本発明複合蓋の好適な一例を示す縦断面図、
第２−１図、及び第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、及び第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＋ｎ
ｏを示す。
■・・・軟質金属製内蓋
２・・・内蓋頂板部
３・・・内蓋スカート部
４・・・内蓋中央開口部
５・・・凝集破壊性害着剤含有塗膜
１０・・・プラスチック外蓋
１１・・・プラスチック外蓋頂板部
１２・・・外蓋スカート部
１３・・・内蓋開目端縁を覆う外蓋の顎部１４・・・内
蓋と外蓋との係合部
１５・・・雌型
１６・・・雄型
１７・・・雌型の静止部材
１８・・・軟質金属製内蓋
１９・・・雌型キャビティ
２０・・・貫通孔
２１・・・直立ピン
２２・・・雌型可動部材
２３・・・雄型の可動外側部材
２４・・・雄型の可動内側部材
２５・・・円形貫通開孔
２８・・・内側部材の径の段部
２９・・・外側部材の径の段部
３０・・・雄型外周面下部
３１・・・雌型静止部材の四部周面
３２・・・雄型下部内周面
３３・・・雄型下端部
３４・・・雄型キャビティ
３５・・・雄型キャビテイ面の刻説部
３６・・・溶融状態で供給された合成樹脂材料３７・・
・外蓋の天面壁
３８・・・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. Yes, Figure 2-2, and Figure 3
Figure 2 is a bottom view of the same, and Figures 4 to 6 are the main parts of a compression molding device for carrying out the method of compression molding a composite lid of the present invention and its operation mechanism.
Indicates o. ■ Soft metal inner lid 2 Inner lid top plate 3 Inner lid skirt 4 Inner lid center opening 5 Cohesive failure harmful adhesive-containing coating 10 -Plastic outer lid 11...Plastic outer lid top plate part 12...Outer lid skirt part 13...Outer lid jaw part 14 that covers the opening edge of the inner lid...Relationship between the inner lid and the outer lid Joint part 15...Female mold 16...Male mold 17...Female stationary member 18...Soft metal inner lid 19...Female mold cavity 20...Through hole 21...Upright Pin 22...Female movable member 23...Male movable outer member 24...Male movable inner member 25...Circular through hole 28...Step portion 29 of the diameter of the inner member・・Step part 30 of the diameter of the outer member ・・Male outer circumferential surface lower part 31 ・Four part circumferential surface 32 of the female stationary member ・Male lower inner circumferential surface 33 ・Male lower end 34・...Male cavity 35...Engraving portion 36 on the male cavity surface...Synthetic resin material 37 supplied in a molten state...
・Top wall 38 of the outer lid...skirt part of the outer lid
Claims (4)
部中央の開口部とを備えた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、備えたプラスチック外蓋から
成り、該プラスチック外蓋は５％未満の成形収縮率（Ａ
ＳＴＭＤ９５５）と６０００乃至１３０００Ｋｇ／ｃｍ
＾２の曲げ剛性率（ＡＳＴＭＤ７４７）とを有するプラ
スチックから成り、 該金属製内蓋は少なくとも頂板部上面に凝集破壊性密着
剤含有塗料層を有し、 該プラスチック外蓋は前記凝集破壊性密着剤含有塗料層
を介して内蓋に対して蓋軸方向に剥離可能に密着してい
ることを特徴とする金属−プラスチック複合蓋。(1) A metal inner lid that includes a top plate, a fixing skirt around the top plate, and 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; and an inner lid skirt. a plastic outer lid having a short skirt portion located on the upper outer periphery of the lid and a releasable engagement portion for sealingly engaging the inner lid opening, the plastic outer lid having a mold shrinkage rate ( A
STMD955) and 6000 to 13000Kg/cm
The metal inner lid has a paint layer containing a cohesive failure adhesive on at least the upper surface of the top plate, and the plastic outer lid has a cohesive failure adhesive. A metal-plastic composite lid, characterized in that it is in close contact with an inner lid through a paint layer so as to be removable in the axial direction of the lid.
、前記凝集破壊性密着剤含有塗料層は変性オレフィン樹
脂を含有する請求項第１項記載の金属−プラスチック複
合蓋。(2) The metal-plastic composite lid according to claim 1, wherein the plastic outer lid is made of an olefin resin, and the paint layer containing a cohesive failure adhesive contains a modified olefin resin.
剤と変性オレフィン樹脂とが１：２乃至１：２０の重量
比で含有される請求項第２項記載の金属−プラスチック
複合蓋。(3) The metal-plastic composite lid according to claim 2, wherein the coating layer containing a cohesive failure adhesive and a modified olefin resin are contained in a weight ratio of 1:2 to 1:20. .
央の開口部とを備え、且つ少なくとも頂板部上面に凝集
破壊性密着剤含有塗料層を設けた金属製内蓋を、外蓋頂
板部及び外蓋スカート部の外面に対応するキャビティ表
面を備えた雌型及び外蓋係合部に対応するキャビティ表
面を備えた雄型内に挿着し、５％未満の成形収縮率（Ａ
ＳＴＭＤ９５５）と６０００乃至１３０００Ｋｇ／ｃｍ
＾２の曲げ剛性率（ＡＳＴＭＤ７４７）とを有するプラ
スチックを溶融状態で前記金属製内蓋と各キャビティ表
面との間に供給し、前記雄型のキャビティ表面が前記雌
型キャビティ表面よりも低い温度となる温度条件下でプ
ラスチック外蓋の成形を行うことを特徴とする金属−プ
ラスチック複合蓋の製法。(4) A metal inner lid comprising a top plate, a fixing skirt around the top plate, and an opening in the center of the top plate, and a coating layer containing a cohesive failure adhesive on at least the upper surface of the top plate; and a male mold having a cavity surface corresponding to the outer lid engaging part and a mold shrinkage rate (A) of less than 5%.
STMD955) and 6000 to 13000Kg/cm
A plastic having a bending stiffness modulus (ASTM D747) of ^2 is supplied in a molten state between the metal inner lid and each cavity surface, and the male cavity surface is at a lower temperature than the female cavity surface. 1. A method for manufacturing a metal-plastic composite lid, characterized by molding the plastic outer lid under temperature conditions.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63031723A JPH0684176B2 (en) | 1988-02-16 | 1988-02-16 | Metal-plastic composite lid and manufacturing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63031723A JPH0684176B2 (en) | 1988-02-16 | 1988-02-16 | Metal-plastic composite lid and manufacturing method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01213167A true JPH01213167A (en) | 1989-08-25 |
| JPH0684176B2 JPH0684176B2 (en) | 1994-10-26 |
Family
ID=12338964
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63031723A Expired - Fee Related JPH0684176B2 (en) | 1988-02-16 | 1988-02-16 | Metal-plastic composite lid and manufacturing method thereof |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0684176B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04267761A (en) * | 1991-02-20 | 1992-09-24 | Toyo Seikan Kaisha Ltd | Metal-plastic composite lid |
| JP2017518200A (en) * | 2014-04-23 | 2017-07-06 | サチミ、コオペラティバ、メッカニーチ、イモラ、ソチエタ、コオペラティバＳａｃｍｉ Ｃｏｏｐｅｒａｔｉｖａ Ｍｅｃｃａｎｉｃｉ Ｉｍｏｌａ Ｓｏｃｉｅｔａ’ Ｃｏｏｐｅｒａｔｉｖａ | Method and apparatus for obtaining an object having an object and a cup-shaped body |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS54128859U (en) * | 1978-02-28 | 1979-09-07 | ||
| JPS62220453A (en) * | 1986-03-24 | 1987-09-28 | 日本クラウンコルク株式会社 | Composite vessel cover |
-
1988
- 1988-02-16 JP JP63031723A patent/JPH0684176B2/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS54128859U (en) * | 1978-02-28 | 1979-09-07 | ||
| JPS62220453A (en) * | 1986-03-24 | 1987-09-28 | 日本クラウンコルク株式会社 | Composite vessel cover |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04267761A (en) * | 1991-02-20 | 1992-09-24 | Toyo Seikan Kaisha Ltd | Metal-plastic composite lid |
| JP2017518200A (en) * | 2014-04-23 | 2017-07-06 | サチミ、コオペラティバ、メッカニーチ、イモラ、ソチエタ、コオペラティバＳａｃｍｉ Ｃｏｏｐｅｒａｔｉｖａ Ｍｅｃｃａｎｉｃｉ Ｉｍｏｌａ Ｓｏｃｉｅｔａ’ Ｃｏｏｐｅｒａｔｉｖａ | Method and apparatus for obtaining an object having an object and a cup-shaped body |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0684176B2 (en) | 1994-10-26 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |