JPH03268925A - 口栓の融着シール方法 - Google Patents

口栓の融着シール方法

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Publication number
JPH03268925A
JPH03268925A JP2069253A JP6925390A JPH03268925A JP H03268925 A JPH03268925 A JP H03268925A JP 2069253 A JP2069253 A JP 2069253A JP 6925390 A JP6925390 A JP 6925390A JP H03268925 A JPH03268925 A JP H03268925A
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JP
Japan
Prior art keywords
plug
spout
films
sheets
sheet
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
Application number
JP2069253A
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English (en)
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JP2940987B2 (ja
Inventor
Toshio Taka
鷹　敏雄
Takao Okubo
卓男 大久保
Akihiro Hashimoto
橋本　昭紘
Yukihiro Nomura
野村　幸宏
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.)
Resonac Holdings Corp
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Showa Denko KK
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Priority to JP2069253A priority Critical patent/JP2940987B2/ja
Publication of JPH03268925A publication Critical patent/JPH03268925A/ja
Application granted granted Critical
Publication of JP2940987B2 publication Critical patent/JP2940987B2/ja
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Expired - Lifetime legal-status Critical Current

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    • 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
    • B29C66/532—Joining single elements to the wall of tubular articles, hollow articles or bars
    • B29C66/5326—Joining single elements to the wall of tubular articles, hollow articles or bars said single elements being substantially flat
    • B29C66/53261—Enclosing tubular articles between substantially flat elements
    • B29C66/53262—Enclosing spouts between the walls of bags, e.g. of medical bags
    • 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
    • B29C65/18—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools
    • 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
    • B29C66/1122—Single lap to lap joints, i.e. overlap 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
    • B29C66/133—Fin-type joints, the parts to be joined being flexible
    • 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
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/91—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux
    • B29C66/914—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux
    • B29C66/9141—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the temperature
    • B29C66/91411—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the temperature of the parts to be joined, e.g. the joining process taking the temperature of the parts to be joined into account
    • 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
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/91—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux
    • B29C66/919—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux characterised by specific temperature, heat or thermal flux values or ranges
    • B29C66/9192—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux characterised by specific temperature, heat or thermal flux values or ranges in explicit relation to another variable, e.g. temperature diagrams
    • B29C66/91921—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux characterised by specific temperature, heat or thermal flux values or ranges in explicit relation to another variable, e.g. temperature diagrams in explicit relation to another temperature, e.g. to the softening temperature or softening point, to the thermal degradation temperature or to the ambient temperature
    • B29C66/91931—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux characterised by specific temperature, heat or thermal flux values or ranges in explicit relation to another variable, e.g. temperature diagrams in explicit relation to another temperature, e.g. to the softening temperature or softening point, to the thermal degradation temperature or to the ambient temperature in explicit relation to the fusion temperature or melting point of the material of one of the parts to be joined
    • B29C66/91933—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux characterised by specific temperature, heat or thermal flux values or ranges in explicit relation to another variable, e.g. temperature diagrams in explicit relation to another temperature, e.g. to the softening temperature or softening point, to the thermal degradation temperature or to the ambient temperature in explicit relation to the fusion temperature or melting point of the material of one of the parts to be joined higher than said fusion temperature
    • 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
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material
    • B29K2023/04—Polymers of ethylene
    • B29K2023/06—PE, i.e. polyethylene
    • B29K2023/0608—PE, i.e. polyethylene characterised by its density
    • B29K2023/0625—LLDPE, i.e. linear low density polyethylene
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material
    • B29K2023/04—Polymers of ethylene
    • B29K2023/06—PE, i.e. polyethylene
    • B29K2023/0608—PE, i.e. polyethylene characterised by its density
    • B29K2023/0633—LDPE, i.e. low density polyethylene
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material
    • B29K2023/10—Polymers of propylene
    • B29K2023/12—PP, i.e. polypropylene
    • 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
    • B29L2031/7148—Blood bags, medical bags

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • High Energy & Nuclear Physics (AREA)
  • Thermal Sciences (AREA)
  • Plasma & Fusion (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)
  • Medical Preparation Storing Or Oral Administration Devices (AREA)

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。

Description

【発明の詳細な説明】 〔産業上の利用分野〕 本発明は口栓部の密封性が改善された口栓付医療用バッ
グおよび口栓の融着方法に関するものである。
〔従来の技術〕
医療用の液体容器、特に柔軟性を有するソフトバッグは
最近その安全性、使い易さ、安全性等の面よりポリオレ
フィン系の材料が使用され始めている。しかしこれら医
療用の液体容器（例えば輸液バッグやＣＡＰＤバッグな
ど）は、容器が非常に高度の品質レベルが要求され、特
に口栓部等に於ける融着性は最も重要な部分である。ま
た材料面に於いても安全性の高い、ポリオレフィン系の
材料が使用され始めているが、例えばポリエチレン（Ｐ
Ｅ）やポリプロピレン（ＰＰ）等はこれらのフィルムや
シートが外部より容易に熱板等により加熱融解、圧着に
よりヒートシールできることにより、包装用材料として
広く利用されている。
しかしこれらの材料の従来のヒートシールの方法は厚み
の比較的薄いフィルム（１００μ以下）や液体容器用と
して口栓を融着するにしても、ストロ−（円筒状）など
直径（外径）が５ｍｍφ以下と比較的細い口栓との融着
が主で、フィルム・シート等の外部よりの加熱融着て充
分対応できた。
しかし先に述べたように医療用のソフトバッグにおいて
はフィルム・シートの厚みが１００μ以上、主に２５０
〜４００μと非常に厚く、また口栓に於いても注射針等
を挿入し易くするため直径の大きい（５ｍｍφ以上、主
に１０ｍ１１φ〜２０ＩＩ■φ）口栓を融着させる必要
が生じてきた。このため口栓の形状等に於いて種々の検
討が行なわれ、例えば円筒状の口栓の両サイドに薄いタ
ブを取り付けた形状のものを用いることにより薄いタブ
部を容易に融解させてフィルム・シートとの融着性を良
くする工夫がなされていた。
〔発明が解決しようとする課題〕 しかしながら、前記のような従来技術の方法では、外部
よりフィルム・シートを加熱することのみで、厚みの大
きいフィルム・シートと直径の大きい口栓との融着性を
高度のレベルに維持することはなかなか困難であった。
例えば充分な熱を口栓とフィルム・シートの融着界面に
伝えるため外部よりの加熱温度を高くしたり、またシー
ル時間を長くすると、これにより口栓とフィルム・シー
トの界面の融着は良好になるものの、これにより口栓の
両側（対称方向）のフィルム・シートが溶かされて、口
栓と融着部分のフィルム・シートの厚みが薄くなってし
まい、結果的に内容液を充てんしたバッグの落袋強度が
小さくなってしまい、実用にならないという問題点かあ
った。
本発明が解決しようとする課題は、これら従来技術の問
題点を解決し、口栓部の密封性か改善された口栓付医療
用バッグを提供することである。
〔課題を解決するための手段〕
本発明者らは前記課題を解決すべく鋭意研究を続けた結
果、厚みの大きいポリオレフィン系のフィルム・シート
においても、かつ直径の大きい円筒状の口栓に対しても
、非常にすくれた密封性を有する融着が可能になること
を見い出した。
即ち、本発明は厚み１００μ以上のフィルム・シートに
直径５■■φ以上の円筒状の口栓を融着させる方法に於
いて、口栓がフィルム・シートと接する前に口栓の表面
を、口栓の材料の融点より１５〜８０℃高い温度で融解
させてから、上記フィルム・シートを口栓に対して対称
方向より、口栓に押しつけて著しく口栓部の密封性を向
上させた口栓の融着方法に関する。予め融解させる温度
が融点より１５℃高い温度以下では融解が不十分であり
、また８０℃高い温度以上では口栓が変形してしまうの
で好ましくない。またこの円筒状の口栓については真円
状のものが一般的であるが、楕円状のものでもかまわな
いが、この場合は直径の値が楕円の短径に相当する。
またこのようにして口栓の表面をシール前に事前に融解
させる方法に於いて、両サイドより熱板で加熱融解させ
ることによって、２枚の熱板のすき間に口栓より融解し
た樹脂がタブ状に少しはみ出した状態になるように加熱
融解させることが更に好ましい。
このタブは０．２〜３＋ａｍ程出た状態か望ましくこの
状態でフィルム・シートとヒートシールすることにより
一段と密封性にすぐれたシールかできる。
この口栓シール部の融着タブは第１図および第２図に示
すように、シール済みの製品の肉眼観察でも明瞭に認め
られるが、タブの幅については拡大鏡又は顕微鏡で正確
に測定することができる。
このタブの幅は口栓の密封性に大きな影響を及はし、特
に落袋試験におけるハクリ強度の低下を少なくするため
には、０．２〜３１１１１．特に好ましくは１〜２．５
ｍｍであることが望ましい。
０．２ｍｍ以下では予備融解の効果は得られるもののタ
ブ生成による強度の上昇効果が少ない。又、３１以上と
なるとシール時に肉が盛り上って、フィルムとの密着性
がかえって悪くなるので好ましくない。本発明により、
厚みの大きいフィルム・シートや直径の大きい円筒状の
口栓に対してもすぐれた融着ができることを以下の実施
例及び比較例をもって示す。
〔実　施　例〕
実施例１〜５及び比較例１〜５ ＬＤＰＥ　（ショウレックスＭ１１２　：ＭＦＲ−１，
２，密度０．９２７．融点１１５℃）の材料を使用して
それぞれのフィルム・シート及び口栓（射出成形；肉厚
１＋＊ｉ、それぞれの直径の円筒状）を作った。このフ
ィルム・シート及び口栓を使用して、先ず口栓表面加熱
温度により加熱金型により第１表に示した各温度に口栓
を約２秒間加熱した。この結果実施例１〜５に於いては
口栓の表面が溶融していることが加熱金型を外した状態
を目視することにより明らかに分かった。この口栓を２
秒以内に各厚みのフィルム・シート２枚をこの口栓に対
して対称にして外面よりシール熱板により押しつけてヒ
ートンールした。このようにして得られた結果を第１表
に示した。一方口栓表面加熱なし又は融点以下で表面か
融けない状態のものを比較例１〜５に示した。これらの
サンプルについて口栓とフィルム・シートのハクリ強度
を測定した。
またこの各条件て口栓付きのバッグ〔フィルム厚み２５
０μ、幅１４０關、全長３５０■鵬〕　（第１図）を作
り１ｐの水を入れて口栓をシールし、口栓部より２ｍの
高さより５回落下後の、口栓部のハクリ強度を測定した
。第１表より分かるように口栓表面加熱により、落袋後
のハクリ強度に著しい差があり、又、シール部融着タブ
の形成により、更に差が増大していることから本発明の
効果が明らかである。
比較例５から分かるように口栓の直径が小さい時は比較
的表面予備加熱が無くても良好であるが直径が５■１以
上に大きくなると表面予備加熱の効果か顕著である。
また同様の現象が実施例６，７、及び比較例６゜７より
Ｌ−ＬＤＰＥ、ＰＰに於いても現われる。
比較例８，９は従来のタブ付口栓の例であるか、タブの
長さか長く、又表面予備加熱温度か低いと、落袋後のハ
クリ強度か弱いことが分かる。
【図面の簡単な説明】
第１図は本発明に係わる口栓付医療用ノ５・ングの一例
を示したものである。 第２図は第１図のＡ−Ａ’切断面の拡大図を示したもの
である。 １・・・フィルム・シート　　２・・・口　栓３・・・
トップシール部 ４・・・口栓シール部の融着タブ ５・・・ボトムシール部

Claims (2)

    【特許請求の範囲】
  1. （１）厚み１００μ以上の２枚のフィルムまたはシート
    間に、外径５ｍｍφ以上の円筒状の口栓を融着してシー
    ルする方法において、口栓がフィルムまたはシートと接
    する前に、口栓の表面を口栓の材料の融点より１５〜８
    ０℃高い温度で融解させてから、２枚の上記フィルム又
    はシートを対称方向から口栓に押しつけて融着すること
    を特徴とする口栓の融着シール方法。
  2. （２）厚み１００μ以上の２枚のフィルムまたはシート
    間に、外径５ｍｍφ以上の円筒状の口栓を存在させ、フ
    ィルム又はシート間及び各フィルムまたはシートと口栓
    間を融着シールしたポリオレフィン系バッグであって、
    ２枚のフィルム又はシートのシール部のうち、口栓近辺
    において、口栓から延びた０．２〜３ｍｍ幅の融着タブ
    が挟持されてシールされていることを特徴とする口栓付
    医療用バッグ。
JP2069253A 1990-03-19 1990-03-19 口栓の融着シール方法 Expired - Lifetime JP2940987B2 (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2069253A JP2940987B2 (ja) 1990-03-19 1990-03-19 口栓の融着シール方法

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2069253A JP2940987B2 (ja) 1990-03-19 1990-03-19 口栓の融着シール方法

Publications (2)

Publication Number Publication Date
JPH03268925A true JPH03268925A (ja) 1991-11-29
JP2940987B2 JP2940987B2 (ja) 1999-08-25

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Country Link
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08117317A (ja) * 1994-09-02 1996-05-14 Kawasumi Lab Inc 医療用バッグ及びその製造方法
JP2000034371A (ja) * 1998-07-16 2000-02-02 Japan Polychem Corp 口栓用材料

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI235111B (en) 2002-10-29 2005-07-01 Showa Denko Plastic Prod Co Bag-making method
JP2007000452A (ja) * 2005-06-24 2007-01-11 Hanshin Kasei Kogyo Kk プラスチックバッグ及びその製造方法

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08117317A (ja) * 1994-09-02 1996-05-14 Kawasumi Lab Inc 医療用バッグ及びその製造方法
JP2000034371A (ja) * 1998-07-16 2000-02-02 Japan Polychem Corp 口栓用材料

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