JPH0852790A - Bottle body made of synthetic resin and molding thereof - Google Patents
Bottle body made of synthetic resin and molding thereofInfo
- Publication number
- JPH0852790A JPH0852790A JP6187461A JP18746194A JPH0852790A JP H0852790 A JPH0852790 A JP H0852790A JP 6187461 A JP6187461 A JP 6187461A JP 18746194 A JP18746194 A JP 18746194A JP H0852790 A JPH0852790 A JP H0852790A
- Authority
- JP
- Japan
- Prior art keywords
- layer
- outer layer
- inner layer
- bottle body
- mouth
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 229920003002 synthetic resin Polymers 0.000 title claims description 10
- 239000000057 synthetic resin Substances 0.000 title claims description 10
- 238000000465 moulding Methods 0.000 title description 13
- 229920005989 resin Polymers 0.000 claims description 13
- 239000011347 resin Substances 0.000 claims description 13
- 238000000034 method Methods 0.000 claims description 10
- 238000000071 blow moulding Methods 0.000 claims description 9
- 230000001070 adhesive effect Effects 0.000 claims description 8
- 239000000463 material Substances 0.000 claims description 8
- 239000000853 adhesive Substances 0.000 claims description 7
- 230000003014 reinforcing effect Effects 0.000 claims description 5
- 238000007493 shaping process Methods 0.000 claims 1
- 238000007789 sealing Methods 0.000 abstract description 2
- 230000000149 penetrating effect Effects 0.000 abstract 1
- 239000007788 liquid Substances 0.000 description 19
- 238000005520 cutting process Methods 0.000 description 13
- 230000000704 physical effect Effects 0.000 description 3
- 238000011038 discontinuous diafiltration by volume reduction Methods 0.000 description 2
- 229920001903 high density polyethylene Polymers 0.000 description 2
- 239000004700 high-density polyethylene Substances 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 230000008961 swelling Effects 0.000 description 2
- 239000004677 Nylon Substances 0.000 description 1
- 239000004840 adhesive resin Substances 0.000 description 1
- 229920006223 adhesive resin Polymers 0.000 description 1
- 150000001336 alkenes Chemical class 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000005304 joining Methods 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- JRZJOMJEPLMPRA-UHFFFAOYSA-N olefin Natural products CCCCCCCC=C JRZJOMJEPLMPRA-UHFFFAOYSA-N 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B11/00—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use
- B05B11/01—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use characterised by the means producing the flow
- B05B11/02—Membranes or pistons acting on the contents inside the container, e.g. follower pistons
- B05B11/026—Membranes separating the content remaining in the container from the atmospheric air to compensate underpressure inside the container
Landscapes
- Laminated Bodies (AREA)
- Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
- Packages (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、定形の外殻を形成する
外層内に、変形自在な内袋を形成する内層を剥離自在に
積層形成し、外観形状を変化させることなく、かつ内溶
液収納部に外気を侵入させることなく、内溶液の注出使
用を可能とした合成樹脂製ブロー成形壜体と、この壜体
の成形方法に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention comprises an inner layer forming a deformable inner bag and a releasable laminated layer formed on the outer layer forming an outer shell of a fixed shape, without changing the outer shape of the inner solution. The present invention relates to a synthetic resin blow-molded bottle body capable of pouring out and using an internal solution without allowing outside air to enter the storage section, and a method for forming the bottle body.
【０００２】[0002]
【従来の技術】定形の外殻を形成する外層内に、変形自
在な内袋を形成する内層を剥離自在に積層して構成した
合成樹脂製ブロー成形壜体の代表的な従来技術として
は、特開平５−３１０２６５号公報に開示された技術が
ある。2. Description of the Related Art As a typical prior art of a blow molding bottle made of synthetic resin, an inner layer forming a deformable inner bag is releasably laminated inside an outer layer forming a regular outer shell. There is a technique disclosed in Japanese Patent Laid-Open No. 5-310265.
【０００３】この従来技術は、壜体をブロー成形する際
に底部に形成される金型喰切り部である底部パーティン
グライン部分が、内層部分同士は接着するが、外層同士
は接着し難いことを利用して、この底部金型喰切り部に
外力を作用させて、外層同士を離反させることによりス
リットを開口形成し、内層部分内に収納された内容液が
注出使用されて、内層部分が形成する内袋が容積減少変
形する際に、このスリットを通して外層と内層部分との
間に外気を侵入させることにより、外層に対する内層部
分の剥離を達成できるようにして、内容液の注出使用に
よる内層部分の容積減少変形が行われるようにしてい
る。In this prior art, the bottom parting line portion, which is a mold cutting portion formed at the bottom when the bottle is blow-molded, adheres the inner layer parts to each other, but it is difficult to bond the outer layers to each other. By applying an external force to this bottom die cutting part, the outer layers are separated from each other to form a slit, and the content liquid stored in the inner layer part is poured out and used, and the inner layer part is used. When the inner bag formed by is deformed in volume reduction, the outside air is allowed to enter between the outer layer and the inner layer portion through this slit, so that the peeling of the inner layer portion from the outer layer can be achieved and the content liquid is poured out. The volume reduction deformation of the inner layer portion is performed by the.
【０００４】このように、この種の壜体は、内袋を形成
する内層部分を外層に対して剥離自在とすることによ
り、内容液の注出に従って内層部分を外層に対して萎み
変形自在としているのであるが、この内層部分の萎み変
形に際して、壜体の口部における内層部分が外層から剥
離して壜体内部（胴部側）に引き込まれる形態で変位し
て、内層部分の内容液収納状態が劣化すると云う不都合
があった。As described above, in this type of bottle, the inner layer portion forming the inner bag is detachable from the outer layer, so that the inner layer portion can be shrunk and deformed with respect to the outer layer in accordance with the pouring of the content liquid. However, when the inner layer portion is deflated and deformed, the inner layer portion at the mouth of the bottle displaces from the outer layer and is drawn into the inside of the bottle (body side), displacing the contents of the inner layer portion. There is an inconvenience that the liquid storage state deteriorates.
【０００５】また、壜体の口部における外層と内層部分
との剥離が発生すると、壜体口部における内層部分内の
シール達成が不可能となり、これにより内層部分内に外
気が侵入して、嫌気性内容液の品質を劣化させると云う
不都合があった。Further, when the outer layer and the inner layer portion at the mouth portion of the bottle are separated from each other, it becomes impossible to achieve the seal in the inner layer portion at the mouth portion of the bottle, which causes the outside air to enter the inner layer portion. There is an inconvenience that the quality of the anaerobic liquid content is deteriorated.
【０００６】この不都合を解消すべく、従来は、壜体を
パリソンからブロー成形する際に、壜体口部のパリソン
カットを“アッパー・プラグイン”技法を用いて達成す
ることにより、壜体口部端面に内層部分が外鍔状に位置
する構造とし、壜体に対する注出ポンプ付きキャップの
締め付け固定により、この外鍔状となった内層部分をキ
ャップと外層との間で強固に挟持固定し、壜体口部の外
層と内層部分との剥離の防止と、内層部分のシールを達
成維持していた。In order to eliminate this inconvenience, conventionally, when the bottle body is blow-molded from the parison, the parison cut of the bottle mouth portion is achieved by using the "upper plug-in" technique, thereby The inner layer part is located on the end face of the part like an outer collar.By tightening and fixing the cap with the pouring pump on the bottle, the inner layer part with the outer collar is firmly clamped and fixed between the cap and the outer layer. The prevention of peeling between the outer layer and the inner layer portion of the bottle mouth and the sealing of the inner layer portion were achieved and maintained.
【０００７】[0007]
【発明が解決しようとする課題】しかしながら、上記従
来技術にあっては、壜体位置部のパリソンカットを“ア
ッパー・プラグイン”と云う特殊な技法で成形する必要
があるので、専用の成形設備と成形操作とを要し、この
ため設備費が大きくなると共に、一つの壜体の成形に要
する作業工程が増えると云う問題があった。However, in the above-mentioned prior art, since the parison cut at the bottle body position needs to be molded by a special technique called "upper plug-in", a dedicated molding equipment is required. Therefore, there is a problem in that the molding cost is increased and the equipment cost is increased, and the number of working steps required for molding one bottle is increased.
【０００８】また、“アッパー・プラグイン”技法は、
その成形性が必ずしも良いものではないので、不良成形
品の発生率が高く、このため生産性を高めることができ
ないと云う問題があった。The "upper plug-in" technique is also
Since the moldability is not always good, there has been a problem that the rate of occurrence of defective molded products is high and therefore productivity cannot be increased.
【０００９】そこで、本発明は、上記した従来技術にお
ける問題点を解消すべく創案されたもので、外層内に内
層部分を剥離自在に積層した壜体において、壜体の口部
における外層と内層部分との組付きを強固に達成するこ
とを技術的課題とし、もって内層部分内の確実で安定し
たシール達成と、内層部分の安定した萎み変形を良好に
得ることを目的とする。Therefore, the present invention was devised to solve the above-mentioned problems in the prior art. In a bottle body in which the inner layer portion is releasably laminated in the outer layer, the outer layer and the inner layer at the mouth of the bottle are formed. It is a technical object to firmly achieve the assembling with the portion, and an object thereof is to achieve a reliable and stable seal in the inner layer portion and a stable shrinkage deformation of the inner layer portion.
【００１０】[0010]
【課題を解決するための手段】上記課題を解決する本発
明の構造手段は、ブロー成形により、定形の外殻を形成
する合成樹脂製の外層を有すること、この外層の内側に
積層され、内袋を形成する可撓性合成樹脂製の中間層と
内層との積層物を有すること、内層を外層および中間層
に接着する樹脂材料とすること、中間層を外層に剥離自
在な樹脂材料とすること、壜体の口部だけに、外層に内
層を直接対向させた壁構造部分を設けること、壜体の底
部の金型喰切り部の外層の端縁間に、外層と中間層との
間への外気の侵入口としてのスリットが形成されるこ
と、にある。The structural means of the present invention for solving the above-mentioned problems is to have an outer layer made of a synthetic resin that forms an outer shell of a fixed shape by blow molding, the inner layer being laminated inside this outer layer. Having a laminate of an intermediate layer made of a flexible synthetic resin and an inner layer forming a bag, making the inner layer a resin material that adheres to the outer layer and the intermediate layer, and making the intermediate layer a peelable resin material for the outer layer That is, only at the mouth of the bottle, provide the wall structure part where the inner layer is directly opposed to the outer layer, between the outer layer and the middle layer between the edges of the outer layer of the mold cutting part at the bottom of the bottle. A slit is formed as an entrance for outside air to enter.
【００１１】少なくとも中間層の全高さ範囲にわたっ
て、外層と中間層に接着する縦帯状の接着帯を、外層と
中間層との間に設けるのが良い。It is preferable that a vertical band-shaped adhesive band that adheres to the outer layer and the intermediate layer is provided between the outer layer and the intermediate layer over at least the entire height range of the intermediate layer.
【００１２】内層の内表面に、この内層に不足する耐内
容物性を補強する補強内層を被覆形成するのが望まし
い。[0012] It is desirable to coat the inner surface of the inner layer with a reinforcing inner layer that reinforces the resistance to contents that the inner layer lacks.
【００１３】また、上記課題を解決する本発明の方法手
段は、外層成形される外側筒の内側に、中間層に成形さ
れる中間筒と内層に成形される内側筒とを順に位置させ
て共押し出ししてパリソンを成形すること、この共押し
出しに際して、エクスチェンジブローにより中間筒だけ
を、成形目的品である壜体の肩部から底部までの高さよ
りも大きい長さで、口部の高さよりも大きい長さの間隔
をもって間欠して位置させること、このパリソンを、中
間筒の上端を略口部の下端に位置させてブロー金型に組
付けて壜体にブロー成形すること、にある。In the method of the present invention for solving the above-mentioned problems, the intermediate cylinder formed in the intermediate layer and the inner cylinder formed in the inner layer are sequentially positioned inside the outer cylinder formed in the outer layer. Extruding to form the parison, and in this co-extrusion, by exchange blow, only the intermediate cylinder is longer than the height from the shoulder to the bottom of the bottle, which is the object of molding, and more than the height of the mouth. The parison is positioned intermittently with a large interval, and the parison is assembled into a blow mold with the upper end of the intermediate cylinder substantially at the lower end of the mouth and blow-molded into a bottle.
【００１４】[0014]
【作用】壜体は、その口部だけに、外層に接着可能な樹
脂材料製の内層を外層に直接対向させた壁構造部分を有
し、他の全部は、外層に剥離自在な樹脂材料製の中間層
を外層に対向させた壁構造となっているので、内袋を構
成する中間層と内層との積層物は、内層が外層に直接対
向した口部部分で外層に対して溶着固定し、中間層が外
層に対向した他の全部で外層に対して剥離自在となって
いる。The bottle body has a wall structure portion in which the inner layer made of a resin material that can be adhered to the outer layer is directly opposed to the outer layer only in the mouth portion, and all the other parts are made of a resin material that can be peeled off to the outer layer. Since it has a wall structure with the middle layer facing the outer layer, the laminate of the middle layer and the inner layer forming the inner bag is welded and fixed to the outer layer at the mouth portion where the inner layer directly faces the outer layer. The middle layer is separable from the outer layer in all other parts facing the outer layer.
【００１５】この壜体の内容液注出に際しては、予め壜
体の底部の金型喰切り部に押圧力を作用させることによ
り、この金型喰切り部においてわずかに接合している外
層の端縁間を離反させて、外層と中間層との間への外気
の侵入口であるスリットを開口形成しておく。At the time of pouring the content liquid of the bottle, a pressing force is applied to the die cutting portion at the bottom of the bottle in advance so that the end of the outer layer slightly joined at the die cutting portion. The edges are separated from each other, and a slit, which is an entrance of outside air between the outer layer and the intermediate layer, is formed by opening.
【００１６】この状態で内容液を注出すると、この内容
液の注出に従って中間層と内層との積層物で構成される
内袋内に負圧が発生し、この負圧によりスリットから外
層と中間層との間に外気を吸引しながら内袋が萎み変
形、すなわち中間層を外層から剥離させながら内袋が萎
み変形し、外気を内袋内に吸引することなく発生した負
圧を消滅させる。When the content liquid is poured out in this state, a negative pressure is generated in the inner bag constituted by the laminate of the intermediate layer and the inner layer according to the pouring of the content liquid, and this negative pressure causes the slit to separate the outer layer. The inner bag is deflated and deformed while sucking outside air between it and the intermediate layer, that is, the inner bag is deflated and deformed while peeling the intermediate layer from the outer layer, and the negative pressure generated without sucking outside air into the inner bag is applied. Extinguish.
【００１７】このように、中間層と内層とにより構成さ
れる内袋は、内容液の注出に従ってその萎み変形を進行
させてゆくが、この内袋は口部部分で外層に接着固定さ
れているので、その萎み変形は、上端部（口部部分のこ
と）を固定部分とした一定した吊下げ状態となるため、
略一定した形態で進行する。As described above, the inner bag composed of the intermediate layer and the inner layer undergoes deflation and deformation in accordance with the pouring of the content liquid, but the inner bag is adhesively fixed to the outer layer at the mouth portion. Since the swelling deformation is a fixed hanging state with the upper end part (the mouth part) as the fixed part,
It progresses in a substantially constant form.
【００１８】すなわち、中間層と内層とで構成される内
袋は、上端部である口部部分で外層に固定された状態
で、他の全部を外層から剥離した状態で萎み変形するの
で、その萎み変形は、上端部を支持した状態で、内容液
の重量の作用により吊下げられた形態、より具体的には
常に多量の内容液が下端部に位置している状態で進行す
ることになるのである。That is, since the inner bag composed of the intermediate layer and the inner layer is fixed to the outer layer at the mouth portion which is the upper end portion, the inner bag is deflated and deformed in a state where all other parts are separated from the outer layer, The swelling deformation proceeds in a state in which the upper end is supported and is suspended by the action of the weight of the content liquid, more specifically, in the state where a large amount of the content liquid is always located at the lower end. It becomes.
【００１９】壜体は、“アッパー・プラグイン”技法を
使用することなく、通常のブロー成形手法により成形さ
れるのであるが、パリソンは、中間筒の上端をブロー金
型の口部成形型面の略下端に位置させてブロー金型に組
付けられるので、中間筒の長さが壜体の肩部から底部ま
での高さよりも大きいこと、およびパリソンにおける中
間筒の間欠部分の長さが壜体の口部の高さよりも大きい
ことにより、このパリソンからブロー成形された壜体
は、口部を外層に内層を直接対向させた積層構造とし、
他の全部である肩部から底部にかけての全部を外層に中
間層を対向させた積層構造となる。The bottle is molded by the usual blow molding technique without using the "upper plug-in" technique. In the parison, the upper end of the intermediate cylinder is used to form the mouth molding surface of the blow mold. The intermediate cylinder is longer than the height from the shoulder to the bottom of the bottle, and the length of the intermediate cylinder in the parison is shorter than that of the bottle. Since it is larger than the height of the mouth of the body, the bottle body blow-molded from this parison has a laminated structure in which the mouth is the outer layer and the inner layer is directly opposed,
All of the other parts, from the shoulder to the bottom, have a laminated structure in which the middle layer is opposed to the outer layer.
【００２０】この壜体のブロー成形操作に際して、ブロ
ー金型に対するパリソンの組付け位置関係は、必ずしも
中間筒の上端を口部成形型面の下端に正確に位置合わせ
しなければならないと云うものではなく、少なくとも口
部成形型面の上部に中間筒の間欠部分が対向していれば
良い。In the blow molding operation of this bottle, the assembly positional relationship of the parison to the blow mold does not necessarily mean that the upper end of the intermediate cylinder must be accurately aligned with the lower end of the mouth molding die surface. Instead, it suffices if the intermittent portion of the intermediate cylinder faces at least the upper part of the mouth molding die surface.
【００２１】[0021]
【実施例】以下、本発明の実施例を、図面を参照しなが
ら説明する。図１に示した壜体１は、下端に底部９を連
設して円筒状に成形された胴部８の上端縁に、テーパー
壁状の肩部７を介して外周面に螺条を刻設し、注出ポン
プ付きキャップ１７が螺合組付けされる口部６を起立連
設した壜体１は、高密度ポリエチレン樹脂で成形され、
壜体１の外殻体として充分な機械的強度を発揮する外層
２と、高密度ポリエチレン樹脂との相溶性がないナイロ
ン樹脂で成形され、充分な可撓性を発揮できる肉厚に成
形された中間層３と、この中間層３の内側に積層され
て、中間層３と組合さって内袋を構成する外層２と中間
層３との両方に相溶性を有するオレフィン系樹脂製の内
層４とを積層して構成され、外層２の内表面の一部に
は、その全高さ範囲にわたって縦帯状に成形されたオレ
フィン系樹脂等の接着性樹脂製の接着帯１２が位置して
いる。Embodiments of the present invention will be described below with reference to the drawings. In the bottle body 1 shown in FIG. 1, a threaded portion is formed on the outer peripheral surface of a body portion 8 which is formed into a cylindrical shape by connecting a bottom portion 9 to a lower end thereof and a tapered wall-shaped shoulder portion 7. The bottle body 1 in which the mouth portion 6 in which the cap 17 with the pouring pump is screwed and assembled is erected continuously is formed of high-density polyethylene resin,
The outer layer 2 that exhibits sufficient mechanical strength as the outer shell of the bottle body 1 and the nylon resin that is incompatible with the high-density polyethylene resin, and are molded to a thickness that allows sufficient flexibility. An intermediate layer 3 and an inner layer 4 made of an olefinic resin which is laminated inside the intermediate layer 3 and is compatible with both the outer layer 2 and the intermediate layer 3 which are combined with the intermediate layer 3 to form an inner bag. Adhesive bands 12 made of an adhesive resin such as an olefin-based resin and formed in the form of a vertical band are located on a part of the inner surface of the outer layer 2 and are formed by laminating.
【００２２】壜体１の口部６は、外層２と内層４との２
層構造となっており、壜体１の肩部７から底部９までの
部分は中間層３を間に位置させて外層２と内層４とによ
り３層構造となっているので、中間層３と内層４とで構
成される内袋は、外層２に対して、壜体１の口部６で溶
着固定し、壜体１の肩部７から底部９の全体で外層２に
対して剥離自在となっている。The mouth portion 6 of the bottle 1 is composed of an outer layer 2 and an inner layer 4.
It has a layered structure, and the portion from the shoulder portion 7 to the bottom portion 9 of the bottle body 1 has a three-layered structure including the outer layer 2 and the inner layer 4 with the intermediate layer 3 interposed therebetween. The inner bag composed of the inner layer 4 is welded and fixed to the outer layer 2 at the mouth portion 6 of the bottle body 1, and the entire shoulder portion 7 to the bottom portion 9 of the bottle body 1 can be peeled off from the outer layer 2. Has become.
【００２３】底部９の下面中央には、横一文字状の金型
喰切り部１０が成形されるが、この金型喰切り部１０に
おける外層２と中間層３と内層４との積層構造は、外側
から外側筒１４、中間筒１５、内側筒１６の順で積層し
たパリソン１３（図３参照）を、ブロー金型により左右
から偏平に押し潰して、そのまま喰切るものであるた
め、図２（ａ）に示すように、外層２は中間層３および
内層４に押し出された状態となって、その喰切り端縁間
をわずかに接触させているだけの状態となる。At the center of the bottom surface of the bottom portion 9, a horizontal line-shaped die cutting portion 10 is formed. The laminated structure of the outer layer 2, the intermediate layer 3 and the inner layer 4 in the die cutting portion 10 is as follows. The parison 13 (see FIG. 3) in which the outer cylinder 14, the intermediate cylinder 15, and the inner cylinder 16 are laminated in this order from the outer side is flatly crushed from the left and right by the blow mold, and the parison 13 is eaten as it is. As shown in a), the outer layer 2 is extruded to the intermediate layer 3 and the inner layer 4, and only a slight contact is made between the cut edges.
【００２４】このため、底部９の金型喰切り部１０にお
ける外層２の端縁間はその接合力が弱く、それゆえ内容
液の注出に先立って、底部９を壜体１内方に押圧する等
の操作を加えることにより、図２（ｂ）に示すように、
この金型喰切り部１０における外層２の端縁間が離反
し、外層２と中間層３との間への外気の侵入口となるス
リット１１が開口形成されることになる。Therefore, the joining force between the edges of the outer layer 2 in the die cutting portion 10 of the bottom portion 9 is weak, and therefore the bottom portion 9 is pressed inwardly of the bottle body 1 prior to the pouring of the content liquid. As shown in FIG. 2B, by adding an operation such as
The edges of the outer layer 2 in the mold cutting portion 10 are separated from each other, and a slit 11 serving as an entrance of outside air between the outer layer 2 and the intermediate layer 3 is formed.
【００２５】接着帯１２により、中間層３がその一部を
全高さ範囲にわたって外層２に接着固定しているので、
中間層３と内層４とから構成される内袋は、壜体１の口
部６と接着帯１２とで外層２に固定されることになり、
このため内袋は、外層２内で口部６から吊下げられた状
態で、縦方向に縮むことなく、接着帯１２側に萎むと云
う一定した形態で萎み変形するが、この萎み変形は、内
容液を常に壜体１の底部９に位置させる形態となるの
で、内容液を無駄なく最後まで注出することができるこ
とになる。By the adhesive band 12, the intermediate layer 3 adheres and fixes a part of the intermediate layer 3 to the outer layer 2 over the entire height range.
The inner bag composed of the intermediate layer 3 and the inner layer 4 is fixed to the outer layer 2 by the mouth portion 6 of the bottle 1 and the adhesive band 12.
For this reason, the inner bag is hung and deformed in a fixed form in which the inner bag is hung from the mouth portion 6 in the outer layer 2 without being contracted in the vertical direction and is deflated to the adhesive band 12 side. Since the content liquid is always positioned on the bottom portion 9 of the bottle body 1, the content liquid can be poured out to the end without waste.
【００２６】この図１に示した壜体１のブロー成形は、
図３（ａ）に示すように、外層２に成形される外側筒１
４と、中間層３に成形される中間筒１５と、内層４に成
形される内側筒１６とを順に積重させて共押し出しする
に際して、エクスチェンジブローにより中間筒１５だけ
を、成形品である壜体１の肩部７から底部９までの高さ
よりも大きい長さ、具体的には壜体１の高さと略等しい
長さで、口部６の高さよりも大きい長さの間隔をもって
間欠に位置させて成形したパリソン１３を、中間筒１５
の上端をブロー金型の口部成形型面下端に対向させる位
置関係でブロー金型に組付けて、壜体１にブロー成形す
る。Blow molding of the bottle body 1 shown in FIG.
As shown in FIG. 3A, the outer cylinder 1 formed in the outer layer 2
4, the intermediate cylinder 15 formed in the intermediate layer 3, and the inner cylinder 16 formed in the inner layer 4 are sequentially stacked and coextruded, only the intermediate cylinder 15 is a molded product by exchange blow. Positioned intermittently with a length greater than the height from the shoulder 7 to the bottom 9 of the body 1, specifically approximately the same as the height of the bottle body 1 and greater than the height of the mouth 6. The parison 13 formed by molding the intermediate cylinder 15
Is assembled to the blow mold in such a positional relationship that the upper end of the blow mold faces the lower end of the mold surface of the blow mold, and the bottle 1 is blow-molded.
【００２７】パリソン１３のブロー金型に対する組付け
位置関係を、中間筒１５の上端をブロー金型の口部成形
型面下端に対向させるものとすることにより、図３
（ｂ）に示すように、金型喰切り部１０は、必ずパリソ
ン１３の外側筒１４と中間筒１５と内側筒１６との三重
壁構造部分に成形されることになり、これにより成形さ
れる金型喰切り部１０は、必ず図２（ａ）に示す、スリ
ット１１の形成が可能な構造となる。The assembling positional relationship of the parison 13 with respect to the blow mold is such that the upper end of the intermediate cylinder 15 faces the lower end of the mouth mold forming surface of the blow mold.
As shown in (b), the mold cutting portion 10 is always formed in a triple wall structure portion of the parison 13 including the outer cylinder 14, the intermediate cylinder 15, and the inner cylinder 16, and is molded by this. The die cutting portion 10 has a structure capable of forming the slit 11 as shown in FIG.
【００２８】内層４は、全く物性の異なる外層２と中間
層３との両方に相溶性を有する必要があることから、適
用される樹脂材料が限定されることになり、内容液によ
ってはその耐内容物性に不足の生じる場合があるが、こ
のような場合には図４に示すように、内層４の内表面
に、収納される内容液に対して優れた耐内容物性を発揮
すると共に、内層４に対して接着性を有する樹脂材料製
の補強内層５を被覆積層するのが良い。Since the inner layer 4 needs to have compatibility with both the outer layer 2 and the intermediate layer 3 having completely different physical properties, the resin material to be applied is limited, and depending on the content liquid, the resistance thereof may be limited. In some cases, the physical properties of the contents may be insufficient. In such a case, as shown in FIG. 4, the inner surface of the inner layer 4 exhibits excellent resistance to the content liquid stored therein and the inner layer. It is preferable that the reinforcing inner layer 5 made of a resin material having an adhesive property with respect to 4 is coated and laminated.
【００２９】要するに、外層２と中間層３と内層４との
組合せにより、内容液収納容器としての壜体１に対する
機械的要求事項を満たし、収納する内容液の物性に応じ
た耐内容物性の不足を補強内層５で補い、機械的にも耐
内容物性的にも優れた容器とすることができるのであ
る。In short, the combination of the outer layer 2, the intermediate layer 3 and the inner layer 4 satisfies the mechanical requirements for the bottle body 1 as a container for storing the content liquid, and lacks the content resistance in accordance with the physical properties of the content liquid to be stored. Can be supplemented by the reinforcing inner layer 5 to provide a container having excellent mechanical and contents resistance.
【００３０】[0030]
【発明の効果】本発明は、上記した構成となっているの
で、以下に示す効果を奏する。壜体は、通常の一般的な
ブロー成形手段により成形することができるので、その
成形操作が簡単であると共に、生産性を低下させる恐れ
もなく、さらに高い成形性を維持できるので、既存のブ
ロー成形設備およびブロー成形手法をそのまま使用し
て、高い生産性および成形性を維持することができる。Since the present invention has the above-described structure, the following effects can be obtained. Since the bottle can be molded by the usual general blow molding means, the molding operation is simple, there is no fear of lowering productivity, and higher moldability can be maintained. High productivity and moldability can be maintained using molding equipment and blow molding techniques as they are.
【００３１】中間層と内層とで構成される内袋は、壜体
の成形と同時に、その口部部分だけを外層の口部部分に
溶着固定するので、外層から剥離した状態で、外層に対
して吊下げ状に保持されることになり、これにより常に
内容液の注出に好適な姿勢を維持すると共に、内袋内へ
の外気の侵入を確実に阻止できる状態を維持する。Since the inner bag composed of the intermediate layer and the inner layer is welded and fixed only to the mouth portion of the outer layer at the same time when the bottle is molded, the inner bag is separated from the outer layer with respect to the outer layer. Therefore, the posture is appropriately maintained for pouring out the content liquid, and the state in which the outside air is reliably prevented from entering the inner bag is maintained.
【００３２】エクスチェンジブローによりパリソンの成
形時点で、外層相当部分と内層相当部分とを溶着固定を
達成するので、外層相当部分と内層相当部分の特定され
た仮称の溶着固定を簡単にかつ確実に達成することがで
き、これにより壜体の成形操作が複雑化するのを防止す
ることができる。Since the portion corresponding to the outer layer and the portion corresponding to the inner layer are welded and fixed at the time of molding the parison by the exchange blow, it is possible to easily and surely perform the welding fixing of the specified portion of the outer layer and the inner layer. Therefore, it is possible to prevent the bottle molding operation from becoming complicated.
【図１】本発明の一実施例を示す、一部縦断した全体側
面図。FIG. 1 is an overall side view showing an embodiment of the present invention with a part thereof cut vertically.
【図２】図１に示した実施例の底部の金型喰切り部の積
層構造およびスリット形成形態を示す、要部拡大縦断面
図。FIG. 2 is an enlarged longitudinal sectional view of an essential part showing a laminated structure and a slit forming form of a die cutting portion at a bottom portion of the embodiment shown in FIG.
【図３】図１に示した実施例のパリソンからのブロー成
形の説明に供する半縦断図。FIG. 3 is a semi-longitudinal section for explaining blow molding from the parison of the embodiment shown in FIG.
【図４】本発明の他の実施例を示す、半縦断側面図。FIG. 4 is a semi-longitudinal side view showing another embodiment of the present invention.
１ ； 壜体 ２ ； 外層 ３ ； 中間層 ４ ； 内層 ５ ； 補強内層 ６ ； 口部 ７ ； 肩部 ８ ； 胴部 ９ ； 底部 １０； 金型喰切り部 １１； スリット １２； 接着帯 １３； パリソン １４； 外側筒 １５； 中間筒 １６； 内側筒 １７； 注出ポンプ付きキャップ 1; Bottle 2; Outer layer 3; Middle layer 4; Inner layer 5; Reinforcement inner layer 6; Mouth portion 7; Shoulder portion 8; Body portion 9; Bottom portion 10; Mold cutting portion 11; Slit 12; Adhesive band 13; Parison 14; Outer tube 15; Intermediate tube 16; Inner tube 17; Cap with pouring pump
Claims (4)
る合成樹脂製の外層(2) と、該外層(2) の内側に積層さ
れ、内袋を形成する可撓性合成樹脂製の中間層(3) と内
層(4) との積層物とから構成され、前記内層(4) を前記
外層(2) および中間層(3) に接着する樹脂材料とすると
共に、前記中間層(3) を前記外層(2)に剥離自在な樹脂
材料とし、口部(6) だけに前記外層(2) に内層(4) を直
接対向させた壁構造部分を設け、さらに底部(9) の金型
喰切り部(10)の前記外層(2) の端縁間に、前記外層(2)
と中間層(3) との間への外気の侵入口としてのスリット
(11)が形成される合成樹脂製壜体。1. An outer layer (2) made of synthetic resin that forms a fixed outer shell by blow molding, and an intermediate layer made of flexible synthetic resin that is laminated inside the outer layer (2) to form an inner bag. It is composed of a laminate of a layer (3) and an inner layer (4), the inner layer (4) is a resin material that adheres to the outer layer (2) and the intermediate layer (3), and the intermediate layer (3) The outer layer (2) is made of a releasable resin material, and only the mouth (6) is provided with a wall structure part in which the inner layer (4) is directly opposed to the outer layer (2), and the bottom (9) mold Between the edges of the outer layer (2) of the biting part (10), the outer layer (2)
Slit as an entrance of outside air between the space and the intermediate layer (3)
A synthetic resin bottle body in which (11) is formed.
たって、外層(2) と該中間層(3) に接着する縦帯状の接
着帯(12)を、前記外層(2) と中間層(3) との間に設けた
請求項１に記載の合成樹脂製壜体。2. An outer layer (2) and a vertical band-shaped adhesive band (12) that adheres to the intermediate layer (3) are provided at least over the entire height range of the intermediate layer (3), and the outer layer (2) and the intermediate layer (2). The synthetic resin bottle body according to claim 1, which is provided between the bottle body and the container body.
する耐内容物性を補強する補強内層(5) を被覆形成した
請求項１または２に記載の合成樹脂製壜体。3. The synthetic resin bottle body according to claim 1, wherein the inner surface of the inner layer (4) is coated with a reinforcing inner layer (5) for reinforcing the content resistance that the inner layer (4) lacks. .
に、中間層(3) に成形される中間筒(15)と内層(4) に成
形される内側筒(16)とを順に位置させて共押し出しする
に際して、エクスチェンジブローにより前記中間筒(15)
だけを肩部(7)から底部(9) までの高さよりも大きい長
さで、口部(6) の高さよりも大きい長さの間隔をもって
間欠して位置させてパリソン(13)を押し出し成形し、該
パリソン(13)を、前記中間筒(15)の上端を略口部(6) の
下端に位置させてブロー金型に組付けて壜体(1) にブロ
ー成形する合成樹脂製壜体の成形方法。4. An inner tube (16) formed in the inner layer (4) and an intermediate tube (15) formed in the intermediate layer (3) inside the outer tube (14) formed in the outer layer (2). When sequentially pushing out the intermediate cylinders (15) by the exchange blow
The parison (13) by extruding the parison (13) at an interval longer than the height from the shoulder (7) to the bottom (9) and with a length greater than the height of the mouth (6). Then, the parison (13) is assembled in a blow mold with the upper end of the intermediate cylinder (15) at the lower end of the mouth (6) and is blow molded into the bottle body (1). Body shaping method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18746194A JP3406997B2 (en) | 1994-08-09 | 1994-08-09 | Synthetic resin bottle and molding method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18746194A JP3406997B2 (en) | 1994-08-09 | 1994-08-09 | Synthetic resin bottle and molding method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0852790A true JPH0852790A (en) | 1996-02-27 |
| JP3406997B2 JP3406997B2 (en) | 2003-05-19 |
Family
ID=16206487
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18746194A Expired - Fee Related JP3406997B2 (en) | 1994-08-09 | 1994-08-09 | Synthetic resin bottle and molding method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3406997B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002187294A (en) * | 2000-10-05 | 2002-07-02 | Canon Inc | Liquid storing container, method for manufacturing the container, and mold used for the method |
| KR100430827B1 (en) * | 2001-11-15 | 2004-05-22 | 주식회사경농 | a liquid storage bottle and the manufacturing method thereof |
| JP2010082916A (en) * | 2008-09-30 | 2010-04-15 | Yoshino Kogyosho Co Ltd | Blow molded container and method for molding the same |
-
1994
- 1994-08-09 JP JP18746194A patent/JP3406997B2/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002187294A (en) * | 2000-10-05 | 2002-07-02 | Canon Inc | Liquid storing container, method for manufacturing the container, and mold used for the method |
| KR100430827B1 (en) * | 2001-11-15 | 2004-05-22 | 주식회사경농 | a liquid storage bottle and the manufacturing method thereof |
| JP2010082916A (en) * | 2008-09-30 | 2010-04-15 | Yoshino Kogyosho Co Ltd | Blow molded container and method for molding the same |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3406997B2 (en) | 2003-05-19 |
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