JP2674774B2 - Sterile container made of synthetic resin and manufacturing method thereof - Google Patents
Sterile container made of synthetic resin and manufacturing method thereofInfo
- Publication number
- JP2674774B2 JP2674774B2 JP63028768A JP2876888A JP2674774B2 JP 2674774 B2 JP2674774 B2 JP 2674774B2 JP 63028768 A JP63028768 A JP 63028768A JP 2876888 A JP2876888 A JP 2876888A JP 2674774 B2 JP2674774 B2 JP 2674774B2
- Authority
- JP
- Japan
- Prior art keywords
- parison
- container
- inert gas
- synthetic resin
- blow
- 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
Links
- 229920003002 synthetic resin Polymers 0.000 title claims description 19
- 239000000057 synthetic resin Substances 0.000 title claims description 19
- 238000004519 manufacturing process Methods 0.000 title claims description 6
- 239000011261 inert gas Substances 0.000 claims description 39
- 229920005989 resin Polymers 0.000 claims description 11
- 239000011347 resin Substances 0.000 claims description 11
- 238000000071 blow moulding Methods 0.000 claims description 10
- 238000007664 blowing Methods 0.000 claims description 7
- 239000007789 gas Substances 0.000 claims description 7
- 238000011049 filling Methods 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 6
- 239000005038 ethylene vinyl acetate Substances 0.000 claims description 3
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 claims description 3
- 238000000465 moulding Methods 0.000 claims description 2
- DQXBYHZEEUGOBF-UHFFFAOYSA-N but-3-enoic acid;ethene Chemical group C=C.OC(=O)CC=C DQXBYHZEEUGOBF-UHFFFAOYSA-N 0.000 claims 1
- 229920006026 co-polymeric resin Polymers 0.000 claims 1
- 238000012371 Aseptic Filling Methods 0.000 description 14
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 13
- 239000001301 oxygen Substances 0.000 description 13
- 229910052760 oxygen Inorganic materials 0.000 description 13
- 238000000034 method Methods 0.000 description 9
- 230000001954 sterilising effect Effects 0.000 description 8
- 235000013305 food Nutrition 0.000 description 7
- 239000010410 layer Substances 0.000 description 5
- 238000004659 sterilization and disinfection Methods 0.000 description 5
- 230000035699 permeability Effects 0.000 description 4
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- 101100508883 Bacillus subtilis (strain 168) iolI gene Proteins 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000003595 mist Substances 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 1
- 241000894006 Bacteria Species 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 239000012790 adhesive layer Substances 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 235000011389 fruit/vegetable juice Nutrition 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 235000013336 milk Nutrition 0.000 description 1
- 239000008267 milk Substances 0.000 description 1
- 210000004080 milk Anatomy 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 229920013716 polyethylene resin Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 235000014214 soft drink Nutrition 0.000 description 1
- 239000003206 sterilizing agent Substances 0.000 description 1
- 238000003860 storage Methods 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
- B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
- B29C49/42—Component parts, details or accessories; Auxiliary operations
- B29C49/46—Component parts, details or accessories; Auxiliary operations characterised by using particular environment or blow fluids other than air
-
- 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
- B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
- B29C49/02—Combined blow-moulding and manufacture of the preform or the parison
- B29C49/04—Extrusion blow-moulding
-
- 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
- B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
- B29C49/42—Component parts, details or accessories; Auxiliary operations
- B29C49/4273—Auxiliary operations after the blow-moulding operation not otherwise provided for
- B29C49/428—Joining
- B29C49/42802—Joining a closure or a sealing foil to the article or pincing the opening
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、容器内を無菌状態とした合成樹脂製の無菌
容器及びその製造方法に関する。Description: TECHNICAL FIELD The present invention relates to an aseptic container made of synthetic resin in which the inside of the container is in an aseptic state, and a method for producing the same.
最近、牛乳、ジュース、清涼飲料等の充填に無菌充填
が採用されるようになってきた。無菌充填を行うには、
当然充填液を殺菌して無菌状態とするばかりでなく、容
器も殺菌して無菌としなければならない。Recently, aseptic filling has been adopted for filling milk, juice, soft drinks and the like. To perform aseptic filling,
Naturally, not only must the filling liquid be sterilized to make it sterile, but the container must also be sterilized.
このような無菌充填方法の１つとして、予め無菌状態
で製造密封された容器を使用することによって、無菌充
填機内での容器内部の殺菌を不要とした方法が開発され
ている。As one of such aseptic filling methods, there has been developed a method that does not require sterilization of the inside of a container in an aseptic filling machine by using a container which is manufactured and sealed in a sterile state in advance.
一方、無菌充填して食品内容物を長期保存する時に、
食品内容物の品質に影響する因子として酸素の存在とい
う問題がある。この酸素には容器の壁面を透過してくる
ものと、無菌充填時に容器の上部に残った空間（ヘッド
スペース）に存在していたものとの２種類がある。この
うち、前者の酸素の影響をなくす手段として、容器の合
成樹脂材料として酸素透過度の低い樹脂を使用する方法
等があり、また後者の酸素の影響をなくす手段として、
無菌充填時に前記ヘッドスペースに存在する酸素を不活
性ガスによりガス置換する方法等がある。On the other hand, when aseptically filling and storing food contents for a long time,
There is a problem of the presence of oxygen as a factor affecting the quality of food contents. There are two types of oxygen, one that permeates the wall surface of the container and one that exists in the space (head space) remaining in the upper part of the container during aseptic filling. Among these, as a means of eliminating the influence of the former oxygen, there is a method of using a resin having a low oxygen permeability as the synthetic resin material of the container, and as a means of eliminating the influence of the latter oxygen,
There is a method in which oxygen existing in the head space at the time of aseptic filling is replaced with an inert gas.
しかし、無菌充填機内で行なうガス置換方法は置換効
率が悪く、また無菌充填工程を複雑化し、無菌充填装置
のスペースを大きく必要と、設備費を高くするという問
題を有していた。また、容器の形状によっては、ガス置
換が困難であるという問題もあった。However, the gas replacement method performed in the aseptic filling machine has problems that the replacement efficiency is poor, the aseptic filling process is complicated, a large space is required for the aseptic filling device, and the equipment cost is increased. There is also a problem that gas replacement is difficult depending on the shape of the container.
本発明は、上記の課題を解決し、食品等の無菌充填に
有用な合成樹脂製の無菌容器およびその製造方法を提供
することを目的とする。An object of the present invention is to solve the above-mentioned problems and to provide an aseptic container made of synthetic resin useful for aseptic filling of foods and the like and a method for producing the same.
本発明はブローヘットのブロー成形用エアノズルの周
りから酸素透過度の低い樹脂を含む２種以上の合成樹脂
からなる合成樹脂材料を押し出して筒状のパリソンを形
成し、前記パリソンが前記ブローヘッドに接続した状態
でパリソンを包囲して金型を閉じ、前記エアノズルから
不活性ガスを前記パリソン内に吹き込んでブロー成形を
行ない、前記不活性ガスが充填された容器部と前記ブロ
ーヘッドとの間の前記パリソンを、前記容器部内に内容
物を充填することなく密封して切り離すことにより、内
部に不活性ガスを正圧状態で密封保持したような構成で
ある。The present invention extrudes a synthetic resin material composed of two or more kinds of synthetic resins containing a resin having a low oxygen permeability from around a blow molding air nozzle to form a cylindrical parison, and the parison is connected to the blow head. In this state, the parison is surrounded and the mold is closed, and an inert gas is blown into the parison from the air nozzle to perform blow molding, and the inert gas is filled between the container portion and the blow head. The parison is configured so that the inert gas is hermetically held in a positive pressure state by sealingly separating the parison without filling the container with the contents.
本発明の合成樹脂正の無菌容器は、内部に無菌状態で
不活性ガスのみを充填して密封され、無菌充填工程のク
リーンブース内で容器上端が開封されて食品等の無菌充
填が行なわれ、この際に容器内部の不活性ガスが容器外
部へ押し出されることにより容器内部への酸素の流入が
阻止され、無効充填後の容器のヘッドスペースは不活性
ガスのみにより満たされる。The synthetic resin positive aseptic container of the present invention is filled with only an inert gas in an aseptic state and sealed, and the container upper end is opened in the clean booth of the aseptic filling process to perform aseptic filling of foods, At this time, the inert gas inside the container is pushed out to the outside of the container to prevent oxygen from flowing into the container, and the head space of the container after the ineffective filling is filled with only the inert gas.
以下、本発明の実施例について第１図乃至第７図を参
照して説明する。第１図において、樹脂の溶融押出機
（図示せず）に連結されているブローヘッド１は不活性
ガス吹き込み用のエアノズル２の周りから酸素透過度の
低い樹脂を含む２種以上の合成樹脂からなる合成樹脂材
料を筒状に押し出すパリソン３を形成する。前記エアノ
ズル２は、前記エアノズル２を上下動させる駆動装置
（図示せず）に連結されて前記ブローヘッド１に対して
上下動可能に取付けられている。前記ブローヘッド１の
下方にはブロー成形用金型4A、4Bが前記パリソン３をは
さんで対向するように配置されている。前記金型4A,4B
は、型締装置（図示せず）に保持されており、第２図に
示されるように前記パリソン３を包囲して閉じることが
できる。また、前記金型4A,4Bは、容器部3aの外形を形
成するための主キャビティ５と、前記容器部3aの上端に
細管部3bを形成するための補助キャビティ６を有し、前
記補助キャビティ６の側方および前記主キャビティ５の
下方に不要なパリソンを収納するための凹部7,8を有し
ている。さらに、前記金型4A,4Bの上端近傍には、それ
ぞれ前記パリソン３をシールするためのシール金具９お
よびこのシール金具９を水平に往復摺動させるエアシリ
ンダ10が配置されている。前記シール金具９は、第３図
および第４図に示されるように前記エアシリンダ２から
不活性ガスが前記パリソン３内に吹き込まれてブロー成
形が終了し前記エアノズル２が前記シール金具９よりも
上方に引き上げられた後に前記エアシリンダ10の作動に
よって前進し、補助キャビティ６内にあるパリソンを両
側からはさみつけてシールする。本実施例では、前記シ
ール金具９はその先端面に刃を有し、シールされたパリ
ソンを切断する機能を有している。Embodiments of the present invention will be described below with reference to FIGS. 1 to 7. In FIG. 1, a blow head 1 connected to a resin melt extruder (not shown) is composed of two or more kinds of synthetic resin containing a resin having low oxygen permeability from around an air nozzle 2 for blowing an inert gas. The parison 3 is formed by extruding the following synthetic resin material into a cylindrical shape. The air nozzle 2 is connected to a driving device (not shown) that moves the air nozzle 2 up and down, and is attached to the blow head 1 so as to be vertically movable. Blow molding dies 4A and 4B are arranged below the blow head 1 so as to face each other with the parison 3 interposed therebetween. The mold 4A, 4B
Is held by a mold clamping device (not shown) and can enclose and close the parison 3 as shown in FIG. The molds 4A and 4B have a main cavity 5 for forming the outer shape of the container portion 3a and an auxiliary cavity 6 for forming a thin tube portion 3b at the upper end of the container portion 3a. There are recesses 7 and 8 on the side of 6 and below the main cavity 5 for accommodating unnecessary parisons. Further, a seal fitting 9 for sealing the parison 3 and an air cylinder 10 for horizontally reciprocating the seal fitting 9 are arranged near the upper ends of the molds 4A, 4B. As shown in FIG. 3 and FIG. 4, the seal fitting 9 is blown with an inert gas from the air cylinder 2 into the parison 3 to complete the blow molding, so that the air nozzle 2 is more than the seal fitting 9. After being pulled up, it is advanced by the operation of the air cylinder 10, and the parison in the auxiliary cavity 6 is pinched from both sides and sealed. In the present embodiment, the sealing metal member 9 has a blade on its tip surface and has a function of cutting the sealed parison.
第５図は、本発明の１実施例における前記ブローヘッ
ド１の概略配置および前記ブローヘッド１内の前記エア
ノズル２に圧縮した不活性ガスを供給するブロー用不活
性ガス供給装置14の概略を示す図である。前記ブローヘ
ッド１は前記金型4A,4Bとともにクリーンブース12内に
配置されており、また、前記ブローヘッド１には溶融樹
脂が樹脂押出機13から供給される。FIG. 5 shows a schematic arrangement of the blow head 1 and an outline of a blown inert gas supply device 14 for supplying a compressed inert gas to the air nozzle 2 in the blow head 1 in one embodiment of the present invention. It is a figure. The blow head 1 is arranged in a clean booth 12 together with the molds 4A and 4B, and molten resin is supplied to the blow head 1 from a resin extruder 13.
前記ブロー用不活性ガス供給装置14は不活性ガス供給
部15a、圧縮空気供給部15bおよび蒸気供給部20を有して
いる。前記不活性ガス供給部15aからの配管と前記圧縮
空気供給部15bからの配管とは、それぞれ手動式のバル
ブV0,V1を通過した後に接続合流し、その下流側にはミ
ストセパレータ16、減圧弁17、エアフィルタ18および通
過気体中の雑菌を除去するための無菌フィルタ19が順次
配置されている。また、前記蒸気供給部20からの配管は
蒸気フィルタ21を通過後に前記無菌フィルタ19に入る配
管に接続合流されている。また、図示例の所定位置には
手動式のバルブV2〜V14、エア作動式の自動バルブDV1,D
V2、ソレノイドバルブSV1および圧力計P1〜P3が配置さ
れている。The blowing inert gas supply device 14 has an inert gas supply unit 15a, a compressed air supply unit 15b, and a steam supply unit 20. Wherein the pipe from the pipe from the inert gas supply unit 15a the compressed air supply unit 15b, connected merge after passing through the valve V 0, V 1 of manual respectively, mist separator 16 on the downstream side, A pressure reducing valve 17, an air filter 18, and a sterile filter 19 for removing contaminants in the passing gas are sequentially arranged. The pipe from the steam supply unit 20 is connected and joined to the pipe that enters the sterile filter 19 after passing through the steam filter 21. Further, manual valves V 2 to V 14 and air-operated automatic valves DV 1 and D 1 are provided at predetermined positions in the illustrated example.
V 2 , solenoid valve SV 1 and pressure gauges P 1 to P 3 are arranged.
次に第１図乃至第６図を参照して本発明の無菌容器の
製造方法を説明する。まず、前記ブロー用不活性ガス供
給装置14の管内及び前記無菌フィルタ19の殺菌を行う。
この殺菌は、前記バルブV2,V4,V5,V7,V8,V11,V12,V13を
閉じた状態で、前記バルブV3を開き、蒸気（例えば、元
圧2.5〜3kg/cm2G）を管内に供給することにより行う。
適当な時間経過後、前記バルブV6を閉じて蒸気供給を止
め、前記バルブV2を開けて前記圧縮空気供給部15bから
圧縮空気（例えば、元圧５〜6kg/cm2G）を管内に送り、
各ドレン用のバルブを開いて内部のドレンを排出し、管
内を冷却、乾燥させる。以上により、少なくとも前記無
菌フィルタ19から前記ブローヘッド１に至る不活性ガス
供給経路の殺菌が行われる。Next, the method for manufacturing a sterile container of the present invention will be described with reference to FIGS. 1 to 6. First, the inside of the pipe of the blown inert gas supply device 14 and the aseptic filter 19 are sterilized.
In this sterilization, the valves V2, V4, V5, V7, V8, V11, V12, V13 are closed, the valve V3 is opened, and steam (for example, an original pressure of 2.5 to 3 kg / cm 2 G) is introduced into the pipe. By supplying.
After a suitable time has elapsed, the valve V6 is closed to stop the steam supply, the valve V2 is opened, and compressed air (for example, original pressure 5 to 6 kg / cm 2 G) is sent into the pipe from the compressed air supply unit 15b.
The valve for each drain is opened to drain the drain inside, and the inside of the pipe is cooled and dried. As described above, at least the inert gas supply path from the aseptic filter 19 to the blow head 1 is sterilized.
次いで不活性ガス供給の前記バルブV1を開け、圧縮空
気供給の前記バルブV0を閉じ前記不活性ガス供給部15a
から不活性ガスを前記ブロー用不活性ガス供給装置14に
供給してブロー成形の準備が完了する。本実施例では、
蒸気殺菌後のドレンぬき、管内冷却では、不活性ガスを
節約する目的で圧縮空気を使用したが、全てを不活性ガ
スで実施してもよい。不活性ガスとしては、窒素ガス、
炭素ガス、アルゴンガスなど食品を酸化せず、安全性の
あものであれば特に制限はない。Next, the valve V 1 for supplying the inert gas is opened, and the valve V 0 for supplying the compressed air is closed, and the inert gas supply unit 15a.
From this, an inert gas is supplied to the blown inert gas supply device 14 to complete the preparation for blow molding. In this embodiment,
Compressed air was used for drain removal after steam sterilization and for cooling the inside of the pipe in order to save the inert gas, but all may be performed with an inert gas. As the inert gas, nitrogen gas,
There is no particular limitation as long as it does not oxidize food such as carbon gas and argon gas and is safe.
なお、管内及び前記無菌フィルタ19の殺菌は、蒸気殺
菌に限定されるものでなく、他の殺菌方向、例えば殺菌
剤のミストを含んだガスを蒸気の代りに送り込んで殺菌
する方法としてもよい。The sterilization of the inside of the pipe and the sterilizing filter 19 is not limited to steam sterilization, and a method of sterilizing may be performed in another sterilizing direction, for example, a gas containing a mist of a sterilizing agent is sent instead of steam.
次に、前記ブロー用不活性ガス供給装置14において、
前記バルブV1,V2,V9,V12,V14,DV2は開かれ、前記バルブ
V10は微少量の不活性ガスを通すことができる程度に開
かれ、他のバルブは閉じられる。従って、前記無菌フィ
ルタ19を通った無菌状態を不活性ガスが、前記バルブDV
2,V10を通ってブローヘッド１に微少量供給され、エア
ノズル２から吹き出している。この状態で、第１図に示
すように前記金型4A,4Bを開いて前記ブローヘッド１よ
り酸素透過度の低い樹脂を含む２種以上の合成樹脂から
なる合成樹脂材料を押し出し前記パリソン３を形成す
る。この時、前記パリソン３の下端は、前回の成形工程
によって既に閉じられており、従ってパリソン３の成形
時に外気が前記パリソン３の内部に入ることはなく、内
部が雑菌で汚染されることはない。なお、前記エアノズ
ル２からの無菌状態の不活性ガス吹き出し量は前記パリ
ソン３内部が負圧にならないように選定されている。こ
のように選定しておくと、例え前記パリソン３に穴があ
いていても、外部の空気が前記パリソン３内に入ること
がないので、好ましい。Next, in the blown inert gas supply device 14,
The valves V1, V2, V9, V12, V14, DV2 are opened and the valves
V10 is opened to allow a small amount of inert gas to pass through, and the other valves are closed. Therefore, the aseptic condition passed through the aseptic filter 19, the inert gas, the valve DV
A small amount is supplied to the blow head 1 through 2, V10 and is blown from the air nozzle 2. In this state, as shown in FIG. 1, the molds 4A and 4B are opened to extrude a synthetic resin material composed of two or more kinds of synthetic resin containing a resin having a lower oxygen permeability than the blow head 1 to push the parison 3 into place. Form. At this time, the lower end of the parison 3 has already been closed by the previous molding step, and therefore, when the parison 3 is molded, outside air does not enter the inside of the parison 3 and the inside thereof is not contaminated with various bacteria. . The aseptic inert gas blowing amount from the air nozzle 2 is selected so that the inside of the parison 3 does not become negative pressure. It is preferable to select in this way, because even if the parison 3 has a hole, outside air does not enter the parison 3.
次に、第１図に示すように、前記金型4A,4Bの前記主
キャビティ５よりも長くパリソン３が形成された後、第
２図に示すように、前記金型4A,4Bを閉じ、前記パリソ
ン３を前記金型4A,4Bの前記主キャビティ５及び前記補
助キャビティ６内に収納し、不要部分を切り離す（な
お、前記主キャビティ５内のバリソン３は二点鎖線で示
している）。次いで前記エアノズル２を下降させて、そ
の先端が前記主キャビティ５内に開口するようにする。
その後、第５図において、前記バルブDV2を閉じ、前記
バルブD1を開く。これにより、前記無菌フィルタ19を通
った無菌状態の不活性ガスが高圧で前記エアノズル２か
ら前記金型4A,4B内の前記パリソン３内に供給され、ブ
ロー成形が行われる。以上の動作により第２図に示すよ
うに、容器部3aとその上端に接続した細管部3bとが形成
される。Next, as shown in FIG. 1, after the parison 3 is formed longer than the main cavity 5 of the molds 4A, 4B, as shown in FIG. 2, the molds 4A, 4B are closed, The parison 3 is housed in the main cavities 5 and the auxiliary cavities 6 of the molds 4A, 4B, and unnecessary parts are cut off (note that the varison 3 in the main cavities 5 is indicated by a chain double-dashed line). Next, the air nozzle 2 is lowered so that the tip thereof opens into the main cavity 5.
Then, in FIG. 5, the valve DV2 is closed and the valve D1 is opened. As a result, the aseptic inert gas that has passed through the aseptic filter 19 is supplied under high pressure from the air nozzle 2 into the parison 3 in the molds 4A and 4B, and blow molding is performed. By the above operation, as shown in FIG. 2, the container portion 3a and the thin tube portion 3b connected to the upper end thereof are formed.
次に、前記バルブDV1が閉じ、前記バルブSV1が開いて
容器部3aの不活性ガスを排気する。前記バルブSV1の開
時間はタイマー（図示せず）で設定されており、容器部
3a内が外圧に対してわずかな正圧となった時点で前記バ
ルブSV1が閉じるようになっている。その後前記エアノ
ズル２が第３図に示す位置に上昇して、次いで、前記細
管部3bの両側から前記シール金具9,9が前記エアシリン
ダ10,10によって前進し、前記細管部3bをはさみつけて
シールし密封する。同時にそのシール部分の中央を切断
する。その後、前記金型4A,4Bを開き、成形した容器部3
aを金型から取り出すことにより、第６図に示す容器が
得られる。このようにしてブロー成形された容器は内部
を外気に曝すことなく密封されており、内部が無菌状態
に保たれている。Next, the valve DV1 is closed and the valve SV1 is opened to exhaust the inert gas in the container portion 3a. The opening time of the valve SV1 is set by a timer (not shown),
The valve SV1 is closed when the inside of 3a becomes a slight positive pressure against the external pressure. After that, the air nozzle 2 rises to the position shown in FIG. 3, and then the seal fittings 9 and 9 are advanced by the air cylinders 10 and 10 from both sides of the thin tube portion 3b to sandwich the thin tube portion 3b. Seal and seal. At the same time, cut the center of the seal part. Then, the mold 4A, 4B is opened, the molded container part 3
The container shown in FIG. 6 is obtained by removing a from the mold. The blow-molded container is sealed without exposing the inside to the outside air, and the inside is kept sterile.
前記金型4A,4Bを開いた後は、再び、前記バルブDV2を
開き、前記エアノズル２から微少量の無菌状態の不活性
ガスを吹き出しながら、前記パリソン３を押し出し成形
し、第１図の状態となる。以下、同様の動作を繰り返
す。After opening the molds 4A and 4B, the valve DV2 is opened again, and the parison 3 is extruded and molded while blowing a small amount of aseptic inert gas from the air nozzle 2, and the state of FIG. Becomes Hereinafter, the same operation is repeated.
なお、本発明の無菌容器の壁面の断面構造の基礎とな
る前記パリソン３の断面構造は、第７図に示されるよう
に５層構造としてもよい。この場合、両側最外層31,31
は主ポリマーとしてのPET系樹脂、最内層33は酸素バリ
ヤー層としてのエチレン酢酸ビニル共重合体ケン化樹
脂、中間層32,32は接着層としての変性ポリエチレン樹
脂とすることにより、容器の壁面を通過して酸素が容器
内に侵入することを有効に防止することができる。The cross-sectional structure of the parison 3 which is the basis of the cross-sectional structure of the wall surface of the aseptic container of the present invention may be a five-layer structure as shown in FIG. In this case, the outermost layers on both sides 31,31
Is a PET-based resin as a main polymer, the innermost layer 33 is an ethylene vinyl acetate copolymer saponified resin as an oxygen barrier layer, and the intermediate layers 32 and 32 are modified polyethylene resins as an adhesive layer, thereby forming a wall surface of the container. Oxygen can be effectively prevented from passing through and entering the container.
本発明によれば、内部が無菌状態のままで不活性ガス
が充填密封された容器を形成することができ、このよう
な容器は無菌充填工程において、容器の外部のみを滅菌
し容器の上端を開封し、食品等の充填、密封を行なうこ
とができるため、容器内部の不活性ガスが容器外部へ押
し出されるのみで容器内部への酸素の流入は起こり得
ず、無菌充填後の容器のヘッドスペースは不活性ガスの
みにより満たされ、食品等の内容物の長期保存が可能と
なるという効果を奏する。According to the present invention, it is possible to form a container in which an inert gas is filled and sealed while the inside remains sterile, and such a container is sterilized only in the outside of the container in the aseptic filling step and the upper end of the container is closed. Since it can be opened, filled with food, etc., and sealed, the inert gas inside the container is pushed out to the outside of the container only and oxygen cannot flow into the container, and the headspace of the container after aseptic filling Is filled with only an inert gas, and has an effect of enabling long-term storage of contents such as foods.
第１図は本発明の合成樹脂製の無菌容器を製造するため
の装置の１例を示す縦断面図、第２図は同装置のブロー
成形時の状態を示す縦断面図、第３図は同装置の異なる
状態を示す縦断面図、第４図は第２図のII−II線におけ
る横断面図、第５図は本発明を実施するための製造装置
の概略図、第６図は本発明の合成樹脂製の無菌容器の１
実施例を示す側面図、第７図は本発明に使用するパリソ
ンの断面構造を示す断面図である。 １……ブローヘッド、２……エアノズル、３……パリソ
ン、3a……容器部、3b……細管部、4A,4B……金型、５
……主キャビティ、６……補助キャビティ、９……シー
ル金具、10……エアシリンダ、12……クリーンブース、
13……樹脂押出機、14……ブロー用不活性ガス供給装
置、19……無菌フィルタ。FIG. 1 is a longitudinal sectional view showing an example of an apparatus for producing a synthetic resin aseptic container of the present invention, FIG. 2 is a longitudinal sectional view showing a state of the apparatus during blow molding, and FIG. FIG. 4 is a longitudinal sectional view showing a different state of the apparatus, FIG. 4 is a lateral sectional view taken along the line II-II of FIG. 2, FIG. 5 is a schematic view of a manufacturing apparatus for carrying out the present invention, and FIG. 1 of the invention aseptic container made of synthetic resin
FIG. 7 is a side view showing an embodiment, and FIG. 7 is a sectional view showing a sectional structure of a parison used in the present invention. 1 ... Blow head, 2 ... Air nozzle, 3 ... Parison, 3a ... Container part, 3b ... Thin tube part, 4A, 4B ... Mold, 5
...... Main cavity, 6 …… Auxiliary cavity, 9 …… Seal fittings, 10 …… Air cylinder, 12 …… Clean booth,
13: Resin extruder, 14: Inert gas supply device for blowing, 19: Aseptic filter.
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.6 識別記号 庁内整理番号 ＦＩ 技術表示箇所 Ｂ６５Ｂ 55/04 Ｂ６５Ｂ 55/04 Ｐ // Ｂ２９Ｋ 23:00 Ｂ２９Ｌ 9:00 22:00 ─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. 6 Identification code Office reference number FI technical display location B65B 55/04 B65B 55/04 P // B29K 23:00 B29L 9:00 22:00
Claims (2)
にガスを吹き込んでブロー成形することにより製造され
る合成樹脂製の容器において、前記容器がブローヘッド
のブロー成型用エアノズルの周りからエチレン酢酸ビニ
ル共重合体ケン化樹脂を含む２種以上の合成樹脂からな
る合成樹脂材料を押し出して筒状のパリソンを形成し、
前記パリソンが前記ブローヘッドに接続した状態でパリ
ソンを包囲して金型を閉じ、前記エアノズルから不活性
ガスを前記パリソン内に吹き込んでフロー成形を行な
い、前記不活性ガスが充填された容器部と前記ブローヘ
ッドとの間の前記パリソンを、前記容器部内に内容物を
充填することなく密封して切り離すことにより、内部に
不活性ガスを正圧状態で密封保持したことを特徴とする
合成樹脂製の無菌容器。1. A container made of synthetic resin, which is manufactured by blowing gas into a parison formed by extruding a synthetic resin to blow-mold the parison, wherein the container is ethylene vinyl acetate from around a blow molding air nozzle of a blow head. A synthetic resin material composed of two or more kinds of synthetic resin including a saponified copolymer resin is extruded to form a cylindrical parison,
The parison surrounds the parison in a state of being connected to the blow head, closes the mold, and blows an inert gas into the parison from the air nozzle to perform flow molding, and a container portion filled with the inert gas. The parison between the blow head and the parison is sealed and separated without filling the container portion with the contents, so that an inert gas is hermetically held in a positive pressure state inside. Aseptic container.
周りからエチレン酢酸ビニル共重合体ケン化樹脂を含む
２種以上の合成樹脂からなる合成樹脂材料を押し出して
筒状のパリソンを形成し、前記パリソンが前記ブローヘ
ッドに接続した状態でパリソンを包囲して金型を閉じ、
前記エアノズルから不活性ガスを前記パリソン内に吹き
込んでブロー成形を行ない、前記不活性ガスが充填され
た容器部と前記ブローヘッドとの間の前記パリソンを、
前記容器部内に内容物を充填することなく密封して切り
離すことを特徴とする合成樹脂製の無菌容器の製造方
法。2. A parison having a cylindrical shape is formed by extruding a synthetic resin material composed of two or more kinds of synthetic resins containing an ethylene vinyl acetate copolymer saponified resin from around an air nozzle for blow molding of a blow head to form a parison. Surrounds the parison with the blow head connected to the blow head and closes the mold,
Blow molding is performed by blowing an inert gas into the parison from the air nozzle, the parison between the container portion and the blow head filled with the inert gas,
A method for producing a synthetic resin-made aseptic container, characterized in that the container is sealed and separated without being filled with the contents.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63028768A JP2674774B2 (en) | 1988-02-12 | 1988-02-12 | Sterile container made of synthetic resin and manufacturing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63028768A JP2674774B2 (en) | 1988-02-12 | 1988-02-12 | Sterile container made of synthetic resin and manufacturing method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01204718A JPH01204718A (en) | 1989-08-17 |
| JP2674774B2 true JP2674774B2 (en) | 1997-11-12 |
Family
ID=12257583
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63028768A Expired - Fee Related JP2674774B2 (en) | 1988-02-12 | 1988-02-12 | Sterile container made of synthetic resin and manufacturing method thereof |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2674774B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100857170B1 (en) * | 2007-06-29 | 2008-09-05 | 주식회사 케이시알 | Blow molding equipment for liner production in the plastic vessel |
| JP6125419B2 (en) * | 2013-12-19 | 2017-05-10 | 東洋自動機株式会社 | Method and apparatus for manufacturing a bag having a recess for accommodating an article to be packaged on one bag surface |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6049919A (en) * | 1983-08-30 | 1985-03-19 | Aida Eng Ltd | Sterilizer for blow and injection mandrel station of plastic container molding machine |
| JPS61134222A (en) * | 1984-12-03 | 1986-06-21 | Nissan Motor Co Ltd | Blow molding method |
-
1988
- 1988-02-12 JP JP63028768A patent/JP2674774B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01204718A (en) | 1989-08-17 |
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