JP2872738B2 - Easy-open container and manufacturing method thereof - Google Patents

Easy-open container and manufacturing method thereof

Info

Publication number
JP2872738B2
JP2872738B2 JP8096990A JP8096990A JP2872738B2 JP 2872738 B2 JP2872738 B2 JP 2872738B2 JP 8096990 A JP8096990 A JP 8096990A JP 8096990 A JP8096990 A JP 8096990A JP 2872738 B2 JP2872738 B2 JP 2872738B2
Authority
JP
Japan
Prior art keywords
layer
flange
container
seal
sealing
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 - Fee Related
Application number
JP8096990A
Other languages
Japanese (ja)
Other versions
JPH03289467A (en
Inventor
忠夫 高垣
清豪 赤沢
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sumitomo Bakelite Co Ltd
Original Assignee
Sumitomo Bakelite Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Sumitomo Bakelite Co Ltd filed Critical Sumitomo Bakelite Co Ltd
Priority to JP8096990A priority Critical patent/JP2872738B2/en
Priority to US07/629,907 priority patent/US5176314A/en
Priority to CA002032889A priority patent/CA2032889C/en
Priority to DE69022015T priority patent/DE69022015T2/en
Priority to EP90314200A priority patent/EP0435638B1/en
Priority to KR1019900021646A priority patent/KR930003909B1/en
Priority to AU72652/91A priority patent/AU628723B2/en
Publication of JPH03289467A publication Critical patent/JPH03289467A/en
Priority to US07/823,371 priority patent/US5316603A/en
Application granted granted Critical
Publication of JP2872738B2 publication Critical patent/JP2872738B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

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
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • 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
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/08—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using ultrasonic vibrations
    • 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
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/76—Making non-permanent or releasable joints
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/112—Single lapped joints
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/13—Single flanged joints; Fin-type joints; Single hem joints; Edge joints; Interpenetrating fingered joints; Other specific particular designs of joint cross-sections not provided for in groups B29C66/11 - B29C66/12
    • B29C66/131—Single flanged joints, i.e. one of the parts to be joined being rigid and flanged in the joint area
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/20—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines
    • B29C66/24—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being closed or non-straight
    • B29C66/242—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being closed or non-straight said joint lines being closed, i.e. forming closed contours
    • B29C66/2422—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being closed or non-straight said joint lines being closed, i.e. forming closed contours being circular, oval or elliptical
    • B29C66/24221—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being closed or non-straight said joint lines being closed, i.e. forming closed contours being circular, oval or elliptical being circular
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
    • B29C66/53—Joining single elements to tubular articles, hollow articles or bars
    • B29C66/534—Joining single elements to open ends of tubular or hollow articles or to the ends of bars
    • B29C66/5346—Joining single elements to open ends of tubular or hollow articles or to the ends of bars said single elements being substantially flat
    • B29C66/53461—Joining single elements to open ends of tubular or hollow articles or to the ends of bars said single elements being substantially flat joining substantially flat covers and/or substantially flat bottoms to open ends of container bodies
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/72—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined
    • B29C66/723—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined being multi-layered
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/72—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined
    • B29C66/723—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined being multi-layered
    • B29C66/7232—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined being multi-layered comprising a non-plastics layer
    • B29C66/72321—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined being multi-layered comprising a non-plastics layer consisting of metals or their alloys
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/814—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/8141—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined
    • B29C66/81427—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined comprising a single ridge, e.g. for making a weakening line; comprising a single tooth
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/814—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/8141—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined
    • B29C66/81433—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined being toothed, i.e. comprising several teeth or pins, or being patterned
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
    • B29C66/832—Reciprocating joining or pressing tools
    • B29C66/8322—Joining or pressing tools reciprocating along one axis
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/71—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the composition of the plastics material of the parts to be joined
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/72—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined
    • B29C66/723—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined being multi-layered
    • B29C66/7234—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined being multi-layered comprising a barrier layer
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/73—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/739—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/7392—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic
    • B29C66/73921—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic characterised by the materials of both parts being thermoplastics
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
    • B29C66/832—Reciprocating joining or pressing tools
    • B29C66/8322—Joining or pressing tools reciprocating along one axis
    • B29C66/83221—Joining or pressing tools reciprocating along one axis cooperating reciprocating tools, each tool reciprocating along one axis
    • 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
    • B29L2031/712—Containers; Packaging elements or accessories, Packages

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Closing Of Containers (AREA)
  • Packages (AREA)

Description

【発明の詳細な説明】 （産業上の利用分野） 本発明は のフランジ部を有するプラスチック製の容器と蓋材とか
ら構成される食品包装容器において、蓋材を容易に開封
することができる包装容器とその製造方法に関するもの
である。DETAILED DESCRIPTION OF THE INVENTION (Industrial application field) The present invention relates to a packaging container in which a lid material can be easily opened in a food packaging container composed of a plastic container having a flange portion and a lid material, and a method of manufacturing the same.

（従来の技術） 各種の食品類を包装するための包装容器として蓋材が
容易に開封できる、いわゆるイージーオープン構造のプ
ラスチックの包装容器が汎用されている。(Prior Art) As a packaging container for packaging various foods, a plastic packaging container having a so-called easy-open structure in which a lid material can be easily opened is widely used.

従来から実用されている最も一般的なイージーオープ
ンタイプのものの構造は、蓋材のシール層を構成する樹
脂の組成を変えることによって、容器のフランジ部と蓋
材とのシール強度を適当な範囲（通常500〜1500g/15m
m）に調整し、シール界面を剥離して開封する形態のも
の（界面剥離タイプ）がある。The structure of the most common easy-open type, which has been conventionally used, is to change the composition of the resin constituting the sealing layer of the lid material so that the sealing strength between the flange portion of the container and the lid material is in an appropriate range ( Normal 500 ~ 1500g / 15m
m), the seal interface is peeled off and the seal is opened (interface peeling type).

しかしながら、この界面剥離タイプでは、付与するシ
ール強度がシール時の条件、環境温度、内容物の付着等
の影響を受けやすいため、目的範囲のシール強度を得る
ための制御が難しく、往々にして強弱のバラツキを発生
させる欠点があった。このバラツキは弱い方に偏るとシ
ール漏れを生じ、逆に強い方に偏ると剥離性を阻害して
イージーオープン性を損なってしまうという結果を招
く。特にシール漏れは密封容器包装体としては致命的な
欠陥となるため、通常剥離性を犠牲にしてもシールの熱
圧条件を高めに設定する方策が採られていた。However, in this interfacial peeling type, since the sealing strength to be applied is easily affected by conditions at the time of sealing, environmental temperature, adhesion of contents, and the like, it is difficult to control to obtain the sealing strength in a target range, and it is often weak. However, there is a drawback that the variation of the above occurs. If this unevenness is biased toward a weaker side, a seal leak occurs, and if the unevenness is biased toward a stronger side, the peelability is impaired and the easy-open property is impaired. In particular, since a seal leak is a fatal defect for a sealed container package, a measure has been taken to set the heat pressure condition of the seal to a higher value, usually at the expense of peelability.

このような問題を改善するため、例えば特公昭50-375
97号公報に記載されているように、容器のフランジ側の
シール層とこれに隣接する層との間をデラミネーション
することによって開封する方法（層間剥離タイプ）が知
られている。To improve such problems, for example, Japanese Patent Publication No. 50-375
As described in JP-A-97-97, there is known a method of delamination between a seal layer on the flange side of a container and a layer adjacent to the seal layer (delamination type).

しかしながら、通常のシール方式でこの構造を採ろう
とするとシール層部分が円滑に破断せず、内容物が取り
出し憎いという難点があった。However, when this structure is to be adopted by a normal sealing method, the sealing layer portion does not break smoothly, and there is a problem that the contents cannot be taken out.

この場合、剥離層と隣接層との破断を容易にするため
に、フランジ部にに剥離開始用切り込みと剥離停止用の
切り込みを設置した構造（特開昭63-96060、特開昭63-9
6061号公報等）の改良提案がなされているが、これらの
構造においては耐圧性を損ねる危険性がある。その上シ
ール位置を精密に制御し、これらの切り込み部にヒート
シールへッドがかからないようにしなければならず、こ
れらの切り込み部に少しでもヒートシールヘッドがかか
ればシール層が切断され難くなってしまい、蓋材と容器
本体がきれいに分離しないケースがあり、開封性の面に
おいて問題が残されていた。In this case, in order to facilitate the breakage of the peeling layer and the adjacent layer, a structure in which a cut for starting peeling and a cut for stopping peeling are provided in the flange portion (Japanese Patent Laid-Open Nos. 63-96060 and 63-969).
No. 6061) has been proposed, but in these structures, there is a risk of impairing the pressure resistance. In addition, the sealing position must be precisely controlled so that the heat seal head does not cover these cuts, and if any heat seal head is applied to these cuts, the seal layer becomes difficult to cut. As a result, there are cases where the lid member and the container main body are not separated cleanly, and there has been a problem in openability.

これ以外にも蓋材の方のシール層に切り込みを入れた
ものを用いる方法も提案されているが、この方法におい
ては容器本体と蓋材との位置合わせを正確に行わなけれ
ばならず、その上フランジ部に切り込みを入れた場合と
同様な問題点がある。更に、容器本体のフランジ部に、
このフランジ形状と同じ形状のシール材を接着しシール
層として、この上に蓋材をシールする方法も提案されて
いるが、この方法もシール層を接着する工程がかかって
しまい、また同様に位置合わせに難点があり、生産性が
悪いという問題があった。In addition to this, a method using a cutout in the sealing layer of the lid material has also been proposed, but in this method, the positioning between the container body and the lid material must be performed accurately. There is the same problem as when a cut is made in the upper flange portion. Furthermore, on the flange of the container body,
A method of bonding a sealing material having the same shape as the flange shape as a sealing layer and sealing a lid material thereon has also been proposed, but this method also requires a step of bonding the sealing layer, and the position of the sealing material is similarly reduced. There was a problem that alignment was difficult and productivity was poor.

（発明が解決しようとする課題） 本発明はこれらの諸問題を解決すべく鋭意検討し、従
来技術において背反性能とされている耐圧密封性と易開
封性を両立させ、しかもヒートシール時に精密な位置合
わせを必要としない易開封性容器とその製造方法を提供
するにある。(Problems to be Solved by the Invention) The present invention has been studied diligently to solve these problems, and achieves both pressure-tight sealing and easy-opening, which are contradictory performances in the prior art. An object of the present invention is to provide an easily-openable container that does not require alignment and a method for manufacturing the container.

即ち、本発明は容器本体のフランジ部の最内円周部全
周および最外円周部全周に渡り２条の１〜3mmの幅に多
数の微少凹部を形成したものと蓋材とをヒートシールす
ることによって、このヒートシール時に特別の制御を必
要とにず、しかも安定した耐圧性を保持しながら円滑な
イージーオープン性を備える密封性のある包装容器の提
供とその製造方法を目的としている。That is, the present invention relates to a container body in which a large number of minute concave portions are formed in a width of 1 to 3 mm over the entire inner circumferential portion and the entire outer circumferential portion of the flange portion of the container body, and the lid material. By heat-sealing, there is no need for special control at the time of this heat-sealing, and it is intended to provide a sealed packaging container having a smooth easy-open property while maintaining a stable pressure resistance and a manufacturing method thereof. I have.

（課題を解決する手段） 本発明は、（１）シール層とこれに接する隣接層との
ラミネート頻度が300〜2000g/25mmであり、シール層の
厚みが10〜70μである多層シートから成形された のフランジを有する容器であって、該フランジ部の表面
の最内円周部から外周に向かって１〜3mmの幅および最
外周部から内側に向かって１〜3mmの幅で全周に渡りピ
ッチ間隔が0.3〜0.8mmであり、深さｄがシール層の厚さ
ｔに対してｄ＝1t〜10tの深さを有する２条の点状の微
小凹部を形成し、このフランジ表面と蓋材間のシール強
度が容器本体のシール層と隣接層とのシール強度以上に
なるようにフランシジ全面をヒートシールする構造を備
える易開封性容器であり、及び（２）シール層とこれに
接する隣接層とのラミネート強度が300〜2000g/25mmで
あり、シール層の厚みが10〜70μである多層シートから
成形された のフランジを有する容器のフランジ部の裏面の最も容器
の内周側壁と更に外側のフランジ落とし側の側壁に沿っ
て２条の平滑面の幅が１〜3mmである受け金型を嵌め込
み、フランジ部の表面シール層側よりピッチ間隔が0.3
〜0.8mmの点状の微小凸部を有する超音波ホーンを用い
て、フランジ部表面に深さｄがシール層の厚さｔに対し
てｄ＝1t〜10tであって、かつフランジ部の総厚Ｔに対
してｄ＜1/5Tとなるような条件で超音波処理し、フラン
ジ部最内円周部側と最外円周部側に２条の点状の微小凹
部を形成し、このフランジ面と蓋材間のシール強度が容
器本体のシール層と隣接層とのラミネート強度以上にな
るようにフランジ部全面をヒートシールすることを特徴
とする易開封性容器の製造方法である。(Means for Solving the Problems) The present invention provides: (1) a sealing layer formed from a multilayer sheet having a lamination frequency of 300 to 2000 g / 25 mm between an adjacent layer and a sealing layer having a thickness of 10 to 70 μm. Was A container having a flange, wherein a pitch of 1 to 3 mm from the innermost peripheral portion to the outer periphery of the surface of the flange portion and a width of 1 to 3 mm from the outermost peripheral portion to the inside are pitched over the entire periphery. An interval is 0.3 to 0.8 mm, and a depth d forms two point-like minute concave portions having a depth d of 1 t to 10 t with respect to a thickness t of the sealing layer. An easily-openable container having a structure in which the entire surface of Francis is heat-sealed such that the seal strength between the seal layer of the container body and the adjacent layer is equal to or higher than (2) the seal layer and the adjacent layer in contact with the seal layer. Molded from a multilayer sheet with a laminate strength of 300-2000g / 25mm and a seal layer thickness of 10-70μ A receiving die having a width of a smooth surface of 1 to 3 mm is fitted along the innermost side wall of the container on the back surface of the flange portion of the container having the flange and the side wall of the outermost flange dropping side. 0.3 pitch pitch from the surface seal layer side of
Using an ultrasonic horn having a point-like small convex portion of about 0.8 mm, the depth d is 1 t to 10 t with respect to the thickness t of the seal layer on the surface of the flange, and the total of the flange is Ultrasonic treatment is performed under such a condition that d <1 / 5T with respect to the thickness T to form two dot-shaped minute concave portions on the innermost circumferential side and the outermost circumferential side of the flange portion. A method of manufacturing an easily-openable container, wherein the entire surface of the flange portion is heat-sealed so that the sealing strength between the flange surface and the lid member is equal to or higher than the lamination strength between the sealing layer and the adjacent layer of the container body.

以下、本発明を図面に沿って詳細に説明する。 Hereinafter, the present invention will be described in detail with reference to the drawings.

第１図は、本発明の易開封性容器を示した断面図で、
１は のフランジ部２を備える容器本体、３は蓋材である。容
器本体１はシール層４とそれに相対する隣接層５を有す
る多層シートからなり、フランジの最外円周部に落とし
部10を有している。FIG. 1 is a cross-sectional view showing an easily-openable container of the present invention.
1 is The container body 3 having the flange portion 2 is a lid material. The container body 1 is composed of a multilayer sheet having a sealing layer 4 and an adjacent layer 5 facing the sealing layer 4, and has a drop portion 10 on the outermost circumferential portion of the flange.

多層シートの構成は、例えばシール層４にポリエチレン
系樹脂、隣接層５にポリプロピレン系樹脂を配した単な
る２層シートでもよく、またこの隣接層５はエチレン酢
酸ビニル共重合体けん化物または塩化ビニリデン系樹脂
等のバリア層、ポリプロピレン系樹脂、ポリエステル系
樹脂等の層または中間層として金属、紙、セラミックス
等積層してなる多層シートであっても差し支えがない。
これら容器本体１を構成する多層シートは、シール層４
と隣接層５の間のラミネート強度が300〜2000g/mm（剥
離角度180°剥離速度200mm/min）であり、シール層４の
厚さが10〜70μの範囲にあることが要件となる。The structure of the multilayer sheet may be a simple two-layer sheet in which, for example, a polyethylene resin is disposed in the seal layer 4 and a polypropylene resin is disposed in the adjacent layer 5, and the adjacent layer 5 is formed of a saponified ethylene vinyl acetate copolymer or a vinylidene chloride. A multilayer sheet formed by laminating metals, papers, ceramics, or the like as a barrier layer such as a resin, a layer such as a polypropylene resin or a polyester resin, or an intermediate layer may be used.
The multilayer sheet constituting the container body 1 includes a sealing layer 4
It is required that the lamination strength between the adhesive layer and the adjacent layer 5 is 300 to 2000 g / mm (peeling angle 180 °, peeling speed 200 mm / min) and the thickness of the sealing layer 4 is in the range of 10 to 70 μm.

ラミネート強度が300g/25mmを下回り、またシール層
の厚みが10μ未満であると十分な密封性を確保すること
ができず、他方、ラミネート強度が2000g/25mmを越え、
シール層の厚みが70μを上回れば開封時の剥離抵抗が大
きくなって、円滑なピール性が損なわれるからである。
蓋材３を形成するフイルムは、容器本体のシール層４と
強固に密着する材質のシーラント層６を有することが望
ましく、最も好適な態様は蓋材質のシーラント層６を容
器本体のシール層４と同一の樹脂材料で構成することで
ある。この蓋材３のフイルムは単層であっても良いが、
バリア性の良好な金属箔またはプラスチック材料を組み
合わせた多層構成とすることもできる。Laminate strength is less than 300g / 25mm, and if the thickness of the seal layer is less than 10μ, sufficient sealing performance cannot be secured, while the laminate strength exceeds 2000g / 25mm,
This is because if the thickness of the seal layer exceeds 70 μ, the peel resistance at the time of opening becomes large, and smooth peelability is impaired.
The film forming the lid member 3 preferably has a sealant layer 6 made of a material that firmly adheres to the seal layer 4 of the container body. In the most preferable embodiment, the sealant layer 6 made of the lid material is combined with the seal layer 4 of the container body. That is, they are made of the same resin material. The film of the cover 3 may be a single layer,
It is also possible to use a multilayer structure in which a metal foil or a plastic material having good barrier properties is combined.

容器本体１の のフランジ部２のシール層面の最内円周部および最外円
周部には２条の１〜3mm幅で全周に渡って多数の微小凹
部７が形成されている。微小凹部７は第２図（容器の斜
視図）に示すようにフランジ部の最内円周部辺および最
外円周部辺に形成されている。微小凹部７は第３図に示
すように、容器本体のフランジ部の裏面に平滑面の幅が
１〜3mmの受け金型８をあて、シール層面よりピッチ間
隔ｗが0.3〜0.8mmの点状の微小凸部を有する超音波ホー
ンヘット９を当てて、フランジ部２の表面に深さｄがシ
ール層の厚さｔに対してｄ＝1t〜10tとなるような多数
の点状の微小凹部を形成する。なお、凹部の深さｄはフ
ランジ部総厚みＴに対してｄ＜1/5Tであるような微小凹
部を形成する。第３図に超音波処理前、第４図（ａ）
（ｂ）に超音波ホーンヘッドの拡大断面図及び拡大平面
図を示す。Of the container body 1 On the innermost and outermost circumferential portions of the sealing layer surface of the flange portion 2, a large number of minute concave portions 7 are formed over the entire circumference with a width of 2 to 3 mm. As shown in FIG. 2 (perspective view of the container), the minute concave portions 7 are formed on the innermost peripheral side and the outermost peripheral side of the flange portion. As shown in FIG. 3, the minute concave portion 7 is provided with a receiving die 8 having a smooth surface width of 1 to 3 mm on the back surface of the flange portion of the container main body, and is formed in a dot shape having a pitch interval w of 0.3 to 0.8 mm from the seal layer surface. The ultrasonic horn head 9 having the minute projections is applied to form a large number of point-like minute recesses on the surface of the flange portion 2 such that the depth d is d = 1t to 10t with respect to the thickness t of the seal layer. Form. Note that a minute recess is formed such that the depth d of the recess is d <1 / 5T with respect to the total thickness T of the flange portion. Before sonication is shown in FIG. 3, FIG. 4 (a)
(B) shows an enlarged sectional view and an enlarged plan view of the ultrasonic horn head.

第５図はフランジ部の微小凹部を形成した拡大図を示
す。ピッチ間隔ｗは0.3〜0.8mmとすることが肝要であ
り、ピッチ間隔が0.3mm未満であると微細すぎて凹部の
有効な深さｄが形成できにくくなりこのことにより安定
したピール感を得ることができなくなると同時にピール
後の外観不良を生じる原因ともなってしまう。又、0.8m
mを越えると目が粗くなりすぎ、同様にシール層の破断
に際して切れの滑らかさが損なわれると同時にピール後
の外観不良（糸曳き状ヒゲ発生）となる。FIG. 5 is an enlarged view showing a minute concave portion of the flange portion. It is important that the pitch interval w is 0.3 to 0.8 mm. If the pitch interval is less than 0.3 mm, it is too fine to form an effective depth d of the concave portion, thereby obtaining a stable peel feeling. At the same time, it also causes poor appearance after peeling. 0.8m
If it exceeds m, the mesh becomes too coarse, and similarly, when the seal layer is broken, the smoothness of the cut is impaired, and at the same time, the appearance is poor after peeling (stringing-like whisker is generated).

又、超音波処理によって形成する微小凹部の幅ｗは１
〜3mmとすることが必要であり、1mm以下であれば、受け
金型が超音波処理時にフランジ部裏面に食い込んでしま
い、フランジ部の外観不良を生ずる恐れがあり、このた
め流通時にフランジ部が欠ける恐れがある。またピッチ
間隔ｗとの関係によりイージーオープン性にばらつきを
生ずる。幅ｗが3mm以上になると、充填時に内容物のオ
ーバーフローしたものが、形成された微小凹部に入り込
んでしまい、密着不良や外観不良となる危険性がある。Further, the width w of the minute concave portion formed by the ultrasonic treatment is 1
It is necessary to be ~ 3 mm, if it is 1 mm or less, the receiving mold will bite into the back surface of the flange portion during ultrasonic treatment, and there is a possibility that the appearance of the flange portion may be poor, so the flange portion may be There is a risk of chipping. Further, the easy-open property varies depending on the relationship with the pitch interval w. If the width w is 3 mm or more, the overflow of the contents at the time of filling may enter the formed minute concave portions, and there is a risk of causing poor adhesion or poor appearance.

更に、処理深さｄはシール層の厚さ、ピッチ間隔ｄと
関連し、上記の場合においては処理深さｄは、シール層
の厚さｔに対してｄ＝1t〜10tの範囲であることが必要
であり、ｄが1t以下であればイージーオープン性が損な
われ、ピール後の外観不良を生じる。またｄが10tを越
えるとピール感が著しく損なわれ、蓋材をシールした後
外観不良となってしまう。Further, the processing depth d is related to the thickness of the sealing layer and the pitch interval d. In the above case, the processing depth d is in the range of d = 1t to 10t with respect to the thickness t of the sealing layer. Is required, and if d is 1 t or less, the easy-open property is impaired, and the appearance is poor after peeling. On the other hand, if d exceeds 10 t, the peeling feeling is significantly impaired, and the appearance becomes poor after sealing the lid material.

これらの形成された微小凹部に、蓋材のシーラント層
を構成する樹脂がヒートシール時に完全に充満する大き
さの凹部であることが必要である。It is necessary that these formed minute recesses have such a size that the resin constituting the sealant layer of the lid material is completely filled at the time of heat sealing.

これらの諸条件のうち、特に望ましい範囲は、点状の
微小凹部のピッチ間隔ｗが0.4〜0.6mm（対角ピッチ間隔
0.6〜0.9mm）であり、処理する幅が１〜2mm、微小凹部
の深さｄが２〜5tの範囲のものが非常に円滑なピール感
を有するものが得られる。Among these conditions, a particularly desirable range is that the pitch interval w of the point-like minute concave portions is 0.4 to 0.6 mm (diagonal pitch interval).
0.6 to 0.9 mm), the width to be processed is 1 to 2 mm, and the depth d of the minute concave portion is in the range of 2 to 5 t, which gives a very smooth peel feeling.

本発明のシール構造は、フランジ部のシール層面の最
内円周部の幅１〜3mmに渡り微小凹部を形成した容器本
体のフランジ部２と蓋材３のシーラント層６とを重ね合
わせてヒートシールすることにより形成されるが、この
場合の条件としてはシール層面と蓋材のシーラント層間
のシール強度が容器本体のシール層４と隣接層５とのラ
ミネート強度以上になる状態にすることである。The seal structure according to the present invention is characterized in that the flange portion 2 of the container body having a minute concave portion formed over the width of 1 to 3 mm of the innermost circumferential portion of the seal layer surface of the flange portion and the sealant layer 6 of the lid member 3 are superposed. It is formed by sealing. The condition in this case is that the seal strength between the seal layer surface and the sealant layer of the lid material is equal to or higher than the laminate strength of the seal layer 4 and the adjacent layer 5 of the container body. .

（作用） 上記した本発明によるシール構造は、第６図に示した
ように蓋材３のシーラント層とフランジ部２のシール層
とが強固に接着した状態で一体となって、フランジ部最
内円周部辺に形成された点状の微小凹部７内にシーラン
ト層の樹脂が充填した形態を呈する。従って、一体化し
たシール層には最内円周部辺において層の厚薄ならびに
シール強度の強弱が分布した独特の構造となっている。
このシール構造が、密封時には内圧、外圧に対して安定
した耐圧性をもたらし、開封時にはまず最外円周部に形
成された微小凹部のところで僅かの力でシール層の破断
が生じ、次いで層間剥離にうつり、最内円周部において
は微小凹部が形成されたところでシール層を容易に破壊
分離してスムースに、完全に開口する。(Operation) The above-described seal structure according to the present invention is integrated with the sealant layer of the lid member 3 and the seal layer of the flange portion 2 in a state of being firmly adhered to each other as shown in FIG. It has a form in which the resin of the sealant layer is filled in the point-like minute concave portions 7 formed on the circumferential side. Therefore, the integrated seal layer has a unique structure in which the thickness of the layer and the strength of the seal are distributed on the innermost circumferential side.
This seal structure provides stable pressure resistance against internal and external pressures during sealing. At the time of opening, the seal layer breaks with a small force at the minute recess formed in the outermost circumference, and then delamination In the innermost circumferential portion, when the minute concave portion is formed, the seal layer is easily broken and separated to smoothly and completely open.

（実施例） ・実施例 全体の厚みが750μであり、シール層として高密度ポ
リエチレン層が40μであり、隣接層としてポリプロピレ
ンからなる多層シートを真空成形し、内径65mm、フラン
ジ部外径75mm、高さ25mmの容器本体を得た。この容器本
体のシール層と隣接層とのラミネート強度は1500g/25mm
であった。(Example) ・ Example The overall thickness is 750 μm, the high-density polyethylene layer is 40 μm as a seal layer, and a multilayer sheet made of polypropylene is vacuum-formed as an adjacent layer. A 25 mm container body was obtained. The lamination strength between the sealing layer and the adjacent layer of this container body is 1500g / 25mm
Met.

ついで、 のフランジ部のシール層面の最内円周部および最外円周
部にピッチ間隔が0.6mmの多数の微小凸部を有する超音
波ホーンヘッドを用いて1.5mmの幅に微小凹部帯を２条
形成させた。超音波処理の条件としては出力2kw（使用
エネルギー;225j）、加圧力338pa、時間0.3秒で処理
し、深さが120μの微小凹部を点状に形成した。Then Using an ultrasonic horn head having a large number of minute projections with a pitch interval of 0.6 mm on the innermost circumference and outermost circumference of the seal layer surface of the flange part, two small recessed strips with a width of 1.5 mm are formed. Formed. Ultrasonic treatment was performed under the conditions of an output of 2 kw (use energy; 225 j), a pressure of 338 pa, and a time of 0.3 second to form minute concave portions having a depth of 120 μm.

蓋材として、容器のシール層と同一の高密度ポリエチ
レン（厚さ50μ）をシーラント層とし、これに延伸した
ポリアミド（厚さ30μ）をドライラミネートしたものを
用いた。As the lid material, the same high-density polyethylene (thickness: 50 μm) as the seal layer of the container was used as a sealant layer, and stretched polyamide (thickness: 30 μm) was dry-laminated to the sealant layer.

容器フランジ部のシール層面に蓋材のシーラント層を重
ねて面圧2kg/cm2、温度190°、時間1.0秒の条件で２回
にわたってヒートシールし、本発明の易開封性容器を得
た。A sealant layer of a lid material was superimposed on the seal layer surface of the container flange portion, and heat-sealed twice under the conditions of a surface pressure of 2 kg / cm 2 , a temperature of 190 °, and a time of 1.0 second to obtain an easily-openable container of the present invention.

得られた50個の密封容器につき、蓋を開封したとこ
ろ、ピール感はすべて安定して円滑に開口し、開封面の
状態も非常に良好であった。When the lid was opened with respect to the obtained 50 sealed containers, the peel feeling was all opened smoothly and stably, and the state of the opened surface was very good.

・比較例 実施例で得た容器本体のフランジ面に、フランジ部の
最内円周部に沿って1mmの位置および最外円周部より1mm
内側の位置に２条の深さ50μの切り込みを全周に渡って
入れた。・ Comparative Example On the flange surface of the container body obtained in the example, a position of 1 mm along the innermost circumferential portion of the flange portion and 1 mm from the outermost circumferential portion.
Two 50 mm deep cuts were made in the inner position over the entire circumference.

この容器本体と実施例の蓋材とで同様の条件でヒート
シールして密封容器を得た。This container body and the lid material of the example were heat-sealed under the same conditions to obtain a sealed container.

得られた容器50個の密封容器について、蓋を開封した
しころ、切り込み部の加工の際の位置ずれやヒートシー
ルの位置ずれ等に起因するピール感の不良のものが約30
％発生した。また、これらの不良のものは殆どが開口部
に糸曳き状にヒゲが発生し、外観が不良であった。Of the 50 sealed containers obtained, about 30 were defective in peeling feeling due to the rollers that opened the lid, the positional deviation during the processing of the notch, and the positional deviation of the heat seal.
%Occurred. In addition, most of these defectives had a stringy whisker at the opening, and the appearance was poor.

（発明の効果） 本発明によれば、容器本体のフランジ部のシール層面
の最内円周部辺に点状の微小凹部を超音波処理により形
成させたフランジ部に蓋材をヒートシールした密封容器
は、非常に安定した、円滑なピール感のものであり、し
かも従来のものに比べてヒートシールが非常に容易であ
り、精密な位置合わせ等は必要とせず、安定したピール
感を持つ容器が効率よく製造できる。(Effects of the Invention) According to the present invention, sealing is achieved by heat-sealing a lid material on a flange portion in which a point-like minute concave portion is formed by ultrasonic processing on the innermost circumferential side of the seal layer surface of the flange portion of the container body. The container has a very stable and smooth peeling feeling, and it is very easy to heat seal compared to conventional ones, does not require precise positioning, etc., and has a stable peeling feeling Can be manufactured efficiently.

【図面の簡単な説明】[Brief description of the drawings]

第１図は本発明の易開封性容器の断面図、第２図は蓋を
半開封した状態を示す容器の斜視図、第３図は容器本体
のフランジ部を超音波処理する工程を示す概略図、第４
図は超音波ホーンヘッドの拡大断面図（ａ）および拡大
平面図（ｂ）、第５図は超音波処理された容器本体のフ
ランジ部の拡大断面図並びに第６図は蓋材のシール状態
と開封状態を示したフランジ部の拡大断面図である。 FIG. 1 is a cross-sectional view of an easily-openable container of the present invention, FIG. 2 is a perspective view of the container showing a state where a lid is half-opened, and FIG. 3 is a schematic diagram showing a process of ultrasonically treating a flange portion of a container body. Figure, 4th
The figure is an enlarged sectional view (a) and an enlarged plan view (b) of an ultrasonic horn head, FIG. 5 is an enlarged sectional view of a flange portion of a container body subjected to ultrasonic treatment, and FIG. It is an expanded sectional view of the flange part which showed the opening state.

Claims (2)

(57)【特許請求の範囲】(57) [Claims] 【請求項１】シール層とこれに接する隣接層とのラミネ
ート強度が300〜2000g/25mmであり、シール層の厚みが1
0〜70μである多層シートから成形された のフランジを有する容器であって、該フランジ部の表面
の最内円周部から外周に向かって１〜3mmの幅および最
外周部から内側に向かって１〜3mmの幅で全周に渡りピ
ッチ間隔が0.3〜0.8mmであり、深さｄがシール層の厚さ
ｔに対してｄ＝1t〜10tの深さを有する２条の点状の微
小凹部を形成し、このフランジ表面と蓋材間のシール強
度が容器本体のシール層と隣接層とのシール強度以上に
なるようにフランシジ全面をヒートシールする構造を備
える易開封性容器。(1) The lamination strength between a sealing layer and an adjacent layer in contact therewith is 300 to 2000 g / 25 mm, and the thickness of the sealing layer is 1
Molded from multilayer sheet which is 0-70μ A container having a flange, wherein a pitch of 1 to 3 mm from the innermost peripheral portion to the outer periphery of the surface of the flange portion and a width of 1 to 3 mm from the outermost peripheral portion to the inside are pitched over the entire periphery. An interval is 0.3 to 0.8 mm, and a depth d forms two point-like minute concave portions having a depth d of 1 t to 10 t with respect to a thickness t of the sealing layer. An easily-openable container having a structure in which the entire surface of Francis is heat-sealed such that the seal strength between the seal layer and the adjacent layer of the container body is equal to or higher than the seal strength. 【請求項２】シール層とこれに接する隣接層とのラミネ
ート強度が300〜2000g/25mmであり、シール層の厚みが1
0〜70μである多層シートから成形された のフランジを有する容器のフランジ部の裏面の最も容器
の内周側壁と更に外側のフランジ落とし側の側壁に沿っ
て２条の平滑面の幅が１〜3mmである受け金型を嵌め込
み、フランジ部の表面シール層側よりピッチ間隔が0.3
〜0.8mmの点状の微小凸部を有する超音波ホーンを用い
て、フランジ部表面に深さｄがシール層の厚さｔに対し
てｄ＝1t〜10tであって、かつフランジ部の総厚Ｔに対
してｄ＜1/5Tとなるような条件で超音波処理し、フラン
ジ部最内円周部側と最外円周部側に２条の点状の微小凹
部を形成し、このフランジ面と蓋材間のシール強度が容
器本体のシール層と隣接層とのラミネート強度以上にな
るようにフランジ部全面をヒートシールすることを特徴
とする易開封性容器の製造方法。2. The lamination strength of a sealing layer and an adjacent layer in contact with the sealing layer is 300 to 2000 g / 25 mm, and the thickness of the sealing layer is 1
Molded from multilayer sheet which is 0-70μ A receiving die having a width of a smooth surface of 1 to 3 mm is fitted along the innermost side wall of the container on the back surface of the flange portion of the container having the flange and the side wall of the outermost flange dropping side. 0.3 pitch pitch from the surface seal layer side of
Using an ultrasonic horn having a point-like small convex portion of about 0.8 mm, the depth d is 1 t to 10 t with respect to the thickness t of the seal layer on the surface of the flange, and the total of the flange is Ultrasonic treatment is performed under such a condition that d <1 / 5T with respect to the thickness T to form two dot-shaped minute concave portions on the innermost circumferential side and the outermost circumferential side of the flange portion. A method for manufacturing an easily-openable container, wherein the entire surface of the flange portion is heat-sealed so that the sealing strength between the flange surface and the lid member is equal to or higher than the lamination strength between the sealing layer and the adjacent layer of the container body.
JP8096990A 1989-12-25 1990-03-30 Easy-open container and manufacturing method thereof Expired - Fee Related JP2872738B2 (en)

Priority Applications (8)

Application Number Priority Date Filing Date Title
JP8096990A JP2872738B2 (en) 1990-03-30 1990-03-30 Easy-open container and manufacturing method thereof
US07/629,907 US5176314A (en) 1989-12-25 1990-12-19 Easily openable sealed container
CA002032889A CA2032889C (en) 1989-12-25 1990-12-20 Easily openable sealed container and process for producing the same
EP90314200A EP0435638B1 (en) 1989-12-25 1990-12-21 Easily openable sealed container and process for producing the same
DE69022015T DE69022015T2 (en) 1989-12-25 1990-12-21 Easy-to-open sealed container and process for its manufacture.
KR1019900021646A KR930003909B1 (en) 1989-12-25 1990-12-24 Easily openable sealed container
AU72652/91A AU628723B2 (en) 1990-03-30 1991-03-05 Easily openable sealed container and process for producing the same
US07/823,371 US5316603A (en) 1989-12-25 1992-01-13 Easily openable sealed container and process for producing the same

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8096990A JP2872738B2 (en) 1990-03-30 1990-03-30 Easy-open container and manufacturing method thereof

Publications (2)

Publication Number Publication Date
JPH03289467A JPH03289467A (en) 1991-12-19
JP2872738B2 true JP2872738B2 (en) 1999-03-24

Family

ID=13733345

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8096990A Expired - Fee Related JP2872738B2 (en) 1989-12-25 1990-03-30 Easy-open container and manufacturing method thereof

Country Status (1)

Country Link
JP (1) JP2872738B2 (en)

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* Cited by examiner, † Cited by third party
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KR101770335B1 (en) * 2016-06-28 2017-08-22 김형훈 Food packaging vessel and packing method thereof

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5613617A (en) * 1994-09-27 1997-03-25 Da Vitoria Lobo; Luis J. Sealed container that is easily opened and mass-produced
FR2793777B1 (en) 1999-05-21 2001-06-22 Soplaril Sa RECLOSABLE PACKAGE WITH CONTAINER COMPRISING A TEARABLE WELDING LAYER, MANUFACTURING METHOD THEREOF
KR100880183B1 (en) * 2007-07-06 2009-01-28 상경물산주식회사 Plastic container for packing
DE102011005537B4 (en) * 2011-03-15 2023-04-20 Herrmann Ultraschalltechnik Gmbh & Co. Kg Tool for making a seal seam
JP6661956B2 (en) * 2015-10-09 2020-03-11 大日本印刷株式会社 Storage container
DE102017119273A1 (en) * 2017-08-23 2019-02-28 Herrmann Ultraschalltechnik Gmbh & Co. Kg Welding tool with sealing surface

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101770335B1 (en) * 2016-06-28 2017-08-22 김형훈 Food packaging vessel and packing method thereof

Also Published As

Publication number Publication date
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