JP2020152455A - Polyester resin multiplex bottle and manufacturing method thereof - Google Patents

Polyester resin multiplex bottle and manufacturing method thereof Download PDF

Info

Publication number
JP2020152455A
JP2020152455A JP2020107657A JP2020107657A JP2020152455A JP 2020152455 A JP2020152455 A JP 2020152455A JP 2020107657 A JP2020107657 A JP 2020107657A JP 2020107657 A JP2020107657 A JP 2020107657A JP 2020152455 A JP2020152455 A JP 2020152455A
Authority
JP
Japan
Prior art keywords
polyester resin
bottle
inner container
container body
mouth portion
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.)
Pending
Application number
JP2020107657A
Other languages
Japanese (ja)
Inventor
正彰 池澤
Masaaki Ikezawa
正彰 池澤
櫻井 康文
Yasufumi Sakurai
康文 櫻井
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.)
Hokkaican Co Ltd
Original Assignee
Hokkaican 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 Hokkaican Co Ltd filed Critical Hokkaican Co Ltd
Priority to JP2020107657A priority Critical patent/JP2020152455A/en
Publication of JP2020152455A publication Critical patent/JP2020152455A/en
Pending legal-status Critical Current

Links

Images

Abstract

To provide a polyester resin multiplex bottle capable of reducing environmental burden and manufacturing cost, and a manufacturing method thereof.SOLUTION: A polyester resin multiplex bottle 1 comprises an outer bottle 2 and an inner container body 3 arranged inside the outer bottle 2, in which the outer bottle 2 contains at least 60 mass% or more of mechanically recycled polyester resin with respect to the total amount. In the manufacturing method of the polyester resin multiplex bottle 1, blow molding is performed in a state where an inner preform 21 formed by injection molding of a polyester resin composition is placed on an inner peripheral side of an outer preform 22 formed by the injection molding of the polyester resin composition containing the mechanically recycled polyester resin in the range.SELECTED DRAWING: Figure 2

Description

本発明は、ポリエステル樹脂製多重ボトル及びその製造方法に関する。 The present invention relates to a polyester resin multiplex bottle and a method for producing the same.

従来、外圧に対して原形復帰可能な外郭ボトルの内部に、外圧により変形されて減容する(以下、「減容変形」ということがある)内容器体を配置し、該外郭ボトルと該内容器体との間に外気が導入されるようにしたポリエステル樹脂製多重ボトルが知られている(例えば、特許文献1参照)。 Conventionally, an inner container body that is deformed and reduced in volume by external pressure (hereinafter, may be referred to as "volume reduction deformation") is arranged inside an outer bottle that can be restored to its original shape with respect to external pressure, and the outer bottle and its contents A polyester resin multiple bottle in which outside air is introduced between the bottle and the body is known (see, for example, Patent Document 1).

前記ポリエステル樹脂製多重ボトルは、外郭ボトルの胴部を押圧することにより、内容器体を減容変形させて内容器体に収容されている内容物を注出する一方、押圧が解除されると別途設けられた逆止弁等の作用により、外郭ボトルと内容器体との間に外気が導入される。この結果、外気圧により外郭ボトルが原形復帰する一方、前記内容器体は外郭ボトルから剥離して減容変形された状態が維持される。このようにするときには、内容器体内に外気が侵入することが無いので、内容器体内に収容されている内容物が酸化等により変質することを防止することができる。 In the polyester resin multiple bottle, the inner container body is reduced in volume and deformed by pressing the body of the outer bottle to eject the contents contained in the inner container body, while the pressing is released. The outside air is introduced between the outer bottle and the inner container body by the action of a check valve or the like provided separately. As a result, the outer bottle returns to its original shape due to the outer air pressure, while the inner container body is separated from the outer bottle to maintain the volume-reduced and deformed state. In this case, since the outside air does not enter the inner container, it is possible to prevent the contents contained in the inner container from being denatured due to oxidation or the like.

前記ポリエステル樹脂製多重ボトルは、例えば、バージンポリエステル樹脂の射出成形により内プリフォーム及び外プリフォームを形成し、外プリフォームの内周側に内プリフォームを配置した状態でブロー成形することにより製造される。 The polyester resin multiple bottle is manufactured by, for example, forming an inner preform and an outer preform by injection molding of a virgin polyester resin, and blow molding with the inner preform arranged on the inner peripheral side of the outer preform. Will be done.

特許平6−39906号公報Japanese Patent No. 6-39906

しかしながら、前述のようにして製造される前記ポリエステル樹脂製多重ボトルは、前記外郭ボトルと前記内容器体との両方がバージンポリエステル樹脂により形成されることとなり、該外郭ボトル内部に該内容器体を配設しない単一のボトルに比較して使用する樹脂量が多くなり、ボトル使用後の廃棄によるリサイクル樹脂量の増加による環境負荷への影響及び製造コストの増大が避けられないという不都合がある。 However, in the polyester resin multiple bottle manufactured as described above, both the outer bottle and the inner container are formed of virgin polyester resin, and the inner container is placed inside the outer bottle. Compared to a single bottle that is not disposed, the amount of resin used is large, and there is the inconvenience that the increase in the amount of recycled resin due to disposal after use of the bottle has an impact on the environmental load and an increase in manufacturing cost is unavoidable.

本発明は、かかる不都合を解消して、前記外郭ボトルと前記内容器体との両方がバージンポリエステル樹脂により形成される場合に比較して環境への負荷を低減し、また製造コストを低減することができるポリエステル樹脂製多重ボトル及びその製造方法を提供することを目的とする。 The present invention eliminates such inconveniences, reduces the burden on the environment and reduces the manufacturing cost as compared with the case where both the outer bottle and the inner container are formed of the virgin polyester resin. It is an object of the present invention to provide a polyester resin multiple bottle capable of producing and a method for producing the same.

かかる目的を達成するために、本発明のポリエステル樹脂製多重ボトルは、外郭ボトルと、該外郭ボトルの内部に配設される内容器体とからなるポリエステル樹脂製多重ボトルにおいて、
少なくとも該外郭ボトルはその全量に対し60質量%以上のメカニカルリサイクルポリエステル樹脂を含有し、該外郭ボトルは、円筒状外口部と、該外口部に連接する肩部と、該肩部に連接する胴部と、該胴部に連接し内周側でボトル内の膨出する凹部を有する底部とを備え、外圧に対して原形復帰可能であり、該内容器体は、該外郭ボトルの該円筒状外口部の内周側に配設される円筒状内口部と、該内口部に連接し該外郭ボトルの内面形状に沿う形状の内容器体本体とを備え、外圧により変形可能であり、該外口部と該内口部との間に形成されて該外郭ボトルと該内容器体との間に外気を導入する通気路とを備えることを特徴とする。
In order to achieve such an object, the polyester resin multiplex bottle of the present invention is a polyester resin multiplex bottle composed of an outer bottle and an inner container body arranged inside the outer bottle.
At least the outer bottle contains 60% by mass or more of mechanically recycled polyester resin with respect to the total amount of the outer bottle, and the outer bottle is connected to a cylindrical outer mouth portion, a shoulder portion connected to the outer mouth portion, and the shoulder portion. It is provided with a body portion to be recycled and a bottom portion having a recessed portion in the bottle which is connected to the body portion and bulges in the bottle on the inner peripheral side, and can be restored to its original shape with respect to external pressure. It is provided with a cylindrical inner mouth portion arranged on the inner peripheral side of the cylindrical outer mouth portion and an inner container body body connected to the inner mouth portion and having a shape that follows the inner surface shape of the outer bottle, and can be deformed by external pressure. It is characterized in that it is provided with a ventilation path formed between the outer mouth portion and the inner mouth portion and for introducing outside air between the outer bottle and the inner container body.

前記メカニカルリサイクルポリエステル樹脂は、回収された使用済みのポリエステル樹脂製ボトルを選別、粉砕、風選処理、洗浄処理した後、高温下で樹脂内部の汚染物質、不純物等を除去したポリエステル樹脂であり、環境への負荷の低減という点で利点の高い材料であり、今後、処理工程の合理化等により、バージンポリエステル樹脂に比較してコスト的にも有利になりうる材料である。しかし、前記メカニカルリサイクルポリエステル樹脂は、キャップを構成する樹脂、ボトルを構成するポリエステル樹脂中に多層状に配設されているブレンド樹脂、ラベル等に由来する樹脂等のポリエステル樹脂以外の樹脂が回収過程で不可避的に混入する。 The mechanically recycled polyester resin is a polyester resin obtained by sorting, crushing, wind-sorting, and cleaning the recovered used polyester resin bottles, and then removing contaminants, impurities, etc. inside the resin at high temperature. It is a material that has a high advantage in terms of reducing the burden on the environment, and in the future, it is a material that can be cost-effective as compared with virgin polyester resin due to rationalization of the treatment process and the like. However, in the mechanical recycled polyester resin, resins other than the polyester resin such as the resin constituting the cap, the blended resin arranged in multiple layers in the polyester resin constituting the bottle, and the resin derived from the label and the like are recovered. Inevitably mixed in.

従って、前記メカニカルリサイクルポリエステル樹脂は、飲料食品用のボトルに使用するに当たっては、精製度を上げることや、前記ポリエステル樹脂以外の樹脂の内容物中への溶出について確認すること等の様々な慎重な配慮が必要とされる。 Therefore, when using the mechanically recycled polyester resin in bottles for beverages and foods, various precautions such as increasing the degree of purification and confirming the elution of resins other than the polyester resin into the contents should be taken into consideration. Consideration is needed.

一方、ポリエステル樹脂製多重ボトルでは、前記内容器体に飲料又は食品が収容されるので、前記外郭ボトルは該飲料又は食品に接触することがない。そこで、本発明のポリエステル樹脂製多重ボトルは、前記外郭ボトルが前記メカニカルリサイクルポリエステル樹脂を主たる成分として含有することにより、該メカニカルリサイクルポリエステル樹脂に含有されるポリエステル樹脂以外の樹脂の内容物への溶出を考慮する必要がなく、増加するバージンポリエステル樹脂の使用量を抑えることができ、製造コストを低減することができる。 On the other hand, in the polyester resin multiple bottle, since the beverage or food is stored in the inner container body, the outer bottle does not come into contact with the beverage or food. Therefore, in the polyester resin multiple bottle of the present invention, the outer bottle contains the mechanically recycled polyester resin as a main component, so that the resin other than the polyester resin contained in the mechanically recycled polyester resin is eluted into the contents. It is not necessary to consider the above, and the increasing amount of virgin polyester resin used can be suppressed, and the manufacturing cost can be reduced.

本発明のポリエステル樹脂製多重ボトルにおいて、前記外郭ボトルはその全量に対し60質量%以上の前記メカニカルリサイクルポリエステル樹脂を含有する。本発明のポリエステル樹脂製多重ボトルは、前記外郭ボトルにおける前記メカニカルリサイクルポリエステル樹脂の含有量が該外郭ボトルの全量の60質量%以上であることにより、前記使用上の利点を生かし、かつ確実に環境への負荷及び製造コストを低減することができる。一方、本発明のポリエステル樹脂製多重ボトルは、前記外郭ボトルにおける前記メカニカルリサイクルポリエステル樹脂の含有量が該外郭ボトルの全量の60質量%未満であるときには、製造コストを十分に低減できない。 In the polyester resin multiple bottle of the present invention, the outer bottle contains 60% by mass or more of the mechanically recycled polyester resin with respect to the total amount thereof. The polyester resin multiple bottle of the present invention makes use of the advantages in use and ensures the environment because the content of the mechanically recycled polyester resin in the outer bottle is 60% by mass or more of the total amount of the outer bottle. The load on the load and the manufacturing cost can be reduced. On the other hand, the polyester resin multiple bottle of the present invention cannot sufficiently reduce the manufacturing cost when the content of the mechanically recycled polyester resin in the outer bottle is less than 60% by mass of the total amount of the outer bottle.

また、本発明のポリエステル樹脂製多重ボトルにおいて、前記内容器体はその全量に対し40質量%以下のメカニカルリサイクルポリエステル樹脂を含有することが好ましい。前記内容器体は、前記メカニカルリサイクルポリエステル樹脂を含有することにより、本発明のポリエステル樹脂製多重ボトルのメカニカルリサイクルポリエステル樹脂の使用量を増やすことができ、環境への負荷及び製造コストをさらに低減することができる。前記内容器体は、バージンポリエステル樹脂からなるものでもよい。 Further, in the polyester resin multiple bottle of the present invention, it is preferable that the inner container body contains 40% by mass or less of mechanically recycled polyester resin with respect to the total amount thereof. By containing the mechanically recycled polyester resin in the inner container body, the amount of the mechanically recycled polyester resin used in the polyester resin multiple bottle of the present invention can be increased, further reducing the burden on the environment and the manufacturing cost. be able to. The inner container may be made of a virgin polyester resin.

このとき、本発明のポリエステル樹脂製多重ボトルでは、前記内容器体における前記メカニカルリサイクルポリエステル樹脂の含有量が該内容器体の全量の40質量%以下であることにより、該メカニカルリサイクルポリエステル樹脂に含有されるポリエステル樹脂以外の樹脂の内容物への溶出の影響を抑制することができる。 At this time, in the polyester resin multiple bottle of the present invention, the content of the mechanically recycled polyester resin in the inner container is 40% by mass or less of the total amount of the inner container, so that the mechanically recycled polyester resin contains the resin. It is possible to suppress the influence of elution of resins other than the polyester resin to the contents.

また、本発明のポリエステル樹脂製多重ボトルにおいて、前記メカニカルリサイクルポリエステル樹脂は、固有粘度が0.7以上であり、Lab色表示系における黄変度bが9以下であることが好ましく、8以下であることがさらに好ましい。前記メカニカルリサイクルポリエステル樹脂は、固有粘度が0.7以上であることにより、バージンポリエステル樹脂と混合して射出成形に用いることができる。また、前記メカニカルリサイクルポリエステル樹脂は、Lab色表示系における黄変度bが9以下であることにより、前記外郭ボトル又は前記内容器体の着色を実用範囲内に抑えることができる。 Further, in the polyester resin multiple bottle of the present invention, the mechanically recycled polyester resin preferably has an intrinsic viscosity of 0.7 or more and a yellowing degree b in the Lab color display system of 9 or less, preferably 8 or less. It is more preferable to have. Since the mechanically recycled polyester resin has an intrinsic viscosity of 0.7 or more, it can be mixed with a virgin polyester resin and used for injection molding. Further, since the mechanically recycled polyester resin has a yellowing degree b of 9 or less in the Lab color display system, the coloring of the outer bottle or the inner container can be suppressed within a practical range.

また、本発明のポリエステル樹脂製多重ボトルにおいて、前記メカニカルリサイクルポリエステル樹脂は、例えば、昇温時の結晶化ピーク温度が145℃以下のものを用いることができる。 Further, in the polyester resin multiple bottle of the present invention, for example, the mechanically recycled polyester resin having a crystallization peak temperature of 145 ° C. or less at the time of temperature rise can be used.

本発明のポリエステル樹脂製多重ボトルは、前記メカニカルリサイクルポリエステル樹脂を含有するポリエステル樹脂組成物の射出成形により形成された外プリフォームの内周側に、ポリエステル樹脂組成物の射出成形により形成された内プリフォームを配置した状態でブロー成形することにより製造することができる。 The polyester resin multiple bottle of the present invention has an inner peripheral side formed by injection molding of a polyester resin composition on the inner peripheral side of an outer preform formed by injection molding of a polyester resin composition containing the mechanically recycled polyester resin. It can be manufactured by blow molding with the preform placed.

本発明のポリエステル樹脂製多重ボトルの構成を示す斜視図。The perspective view which shows the structure of the polyester resin multiplex bottle of this invention. 図1のII−II線断面図。FIG. 1 is a sectional view taken along line II-II of FIG. 外プリフォームの内周側に内プリフォームを配置した状態を示す縦断面図。A vertical cross-sectional view showing a state in which the inner preform is arranged on the inner peripheral side of the outer preform. Aは本発明のポリエステル樹脂製多重ボトルの製造方法の初期段階を示す模式的断面図、Bはブロー成形工程を示す模式的断面図、Cはブロー成形工程の終了段階を示す模式的断面図。A is a schematic cross-sectional view showing an initial stage of the method for producing a polyester resin multiple bottle of the present invention, B is a schematic cross-sectional view showing a blow molding process, and C is a schematic cross-sectional view showing an end stage of the blow molding process.

次に、添付の図面を参照しながら本発明の実施の形態についてさらに詳しく説明する。 Next, embodiments of the present invention will be described in more detail with reference to the accompanying drawings.

図1及び図2に示すように、本実施形態のポリエステル樹脂製多重ボトル1は、外圧に対して原形復帰可能な外郭ボトル2と、外郭ボトル2の内側に収容され外圧により変形する内容器体3とからなる。 As shown in FIGS. 1 and 2, the polyester resin multiplex bottle 1 of the present embodiment has an outer bottle 2 that can be restored to its original shape with respect to an external pressure and an inner container body that is housed inside the outer bottle 2 and deformed by the external pressure. It consists of 3.

外郭ボトル2は、円筒状外口部4と、外口部4に連接する肩部5と、肩部5に連接する上胴部6と、上胴部6に連接する円筒状の中胴部7と、中胴部7に連接する下胴部8と、下胴部8に連接する底部9とを備えている。外口部4は外周面に雄ねじ部10と、サポートリング11とを備え、底部9は外郭ボトル2の内側に膨出してポリエステル樹脂製多重ボトル1に自立性を付与する凹部12を備えている。 The outer bottle 2 has a cylindrical outer mouth portion 4, a shoulder portion 5 connected to the outer mouth portion 4, an upper body portion 6 connected to the shoulder portion 5, and a cylindrical middle body portion connected to the upper body portion 6. 7, a lower body portion 8 connected to the middle body portion 7, and a bottom portion 9 connected to the lower body portion 8 are provided. The outer port portion 4 is provided with a male screw portion 10 and a support ring 11 on the outer peripheral surface, and the bottom portion 9 is provided with a recess 12 that bulges inside the outer bottle 2 and imparts independence to the polyester resin multiple bottle 1. ..

一方、内容器体3は、外口部4内周側に配設される円筒状内口部13と、内口部13に連接し、外郭ボトル2の肩部5、上胴部6、中胴部7、下胴部8、底部9の内面形状に沿う形状の内容器体14とを備えている。内口部13は、上部に外口部4の上端よりも上方に延出された延出部15と、延出部15から径方向外方に張り出す鍔部16とを備えており、鍔部16により外口部4の上端縁に係止されている。 On the other hand, the inner container body 3 is connected to the cylindrical inner mouth portion 13 arranged on the inner peripheral side of the outer mouth portion 4 and the inner mouth portion 13, and is connected to the shoulder portion 5, the upper body portion 6, and the middle portion of the outer bottle 2. It includes an inner container body 14 having a shape that follows the inner surface shape of the body portion 7, the lower body portion 8, and the bottom portion 9. The inner opening portion 13 includes an extending portion 15 extending upward from the upper end of the outer opening portion 4 and a flange portion 16 extending radially outward from the extending portion 15. It is locked to the upper end edge of the outer opening portion 4 by the portion 16.

また、内口部13は、外周面に溝17を備えている。溝17は鍔部16の下面に形成された溝18に連接されており、溝18は鍔部16の外周縁で外部に開放されている。この結果、溝17及び溝18により、外郭ボトル2と内容器体3との間に外気を導入する通気路19が形成されている。 Further, the inner opening portion 13 is provided with a groove 17 on the outer peripheral surface. The groove 17 is connected to a groove 18 formed on the lower surface of the flange portion 16, and the groove 18 is open to the outside at the outer peripheral edge of the flange portion 16. As a result, the groove 17 and the groove 18 form a ventilation path 19 for introducing outside air between the outer bottle 2 and the inner container body 3.

本実施形態のポリエステル樹脂製多重ボトル1は、内容器体3に図示しない内容物が収容されており、該内容物を注出するときには、外口部4及び内口部13を下方に向けて傾ける。そして、外郭ボトル2の中胴部7を押圧すると、内容器体本体14が減容変形することにより、前記内容物が注出される。 The polyester resin multiple bottle 1 of the present embodiment contains contents (not shown) in the inner container body 3, and when the contents are poured out, the outer mouth portion 4 and the inner mouth portion 13 are directed downward. Tilt. Then, when the inner body portion 7 of the outer bottle 2 is pressed, the volume of the inner container body 14 is reduced and deformed, so that the contents are poured out.

次に、外郭ボトル2の中胴部7の押圧を解除すると、外郭ボトル2と内容器体本体14との間に通気路19から外気が導入され、外気圧により外郭ボトル2は原形に復帰するが内容器体本体14は減容変形したままの状態が維持される。この結果、内容器体3内に外気が侵入することが無いので、内容器体3内に収容されている内容物が酸化等により変質することを防止することができる。 Next, when the pressure on the inner body 7 of the outer bottle 2 is released, outside air is introduced from the ventilation passage 19 between the outer bottle 2 and the inner container body 14, and the outer bottle 2 returns to its original shape due to the outside air pressure. However, the inner container body 14 is maintained in a state of being reduced in volume and deformed. As a result, since the outside air does not enter the inner container body 3, it is possible to prevent the contents contained in the inner container body 3 from being denatured due to oxidation or the like.

本実施形態のポリエステル樹脂製多重ボトル1において、外郭ボトル2は例えばその全量に対し60質量%以上のメカニカルリサイクルポリエステル樹脂を含有している。前記メカニカルリサイクルポリエステル樹脂は、回収された使用済みのポリエステル樹脂製ボトルを選別、粉砕、風選処理、洗浄処理した後、高温下で樹脂内部の汚染物質、不純物等を除去したポリエステル樹脂であり、例えば、固有粘度が0.7以上であり、樹脂ペレットを平板に成形した後のLab色表示系における黄変度bが0.5以下であり、昇温時の結晶化ピーク温度が145℃以下である。 In the polyester resin multiple bottle 1 of the present embodiment, the outer bottle 2 contains, for example, 60% by mass or more of mechanically recycled polyester resin with respect to the total amount thereof. The mechanically recycled polyester resin is a polyester resin obtained by sorting, crushing, wind-sorting, and cleaning the recovered used polyester resin bottles, and then removing contaminants, impurities, etc. inside the resin at high temperature. For example, the intrinsic viscosity is 0.7 or more, the yellowing degree b in the Lab color display system after molding the resin pellets into a flat plate is 0.5 or less, and the crystallization peak temperature at the time of temperature rise is 145 ° C. or less. Is.

前記昇温時の結晶化ピーク温度は、次のようにして測定した温度を意味する。まず、ポリエステル樹脂を射出成形して形成されたプリフォームの胴体をパイプカッターにより輪切り状に切断し、表面を除去した後、4mm×4mmの大きさに切り出したものを試料とする。次に、前記試料の質量を精秤したのち、パーキンエルマー社製DSC用アルミニウム製標準サンプルパンに封入し、示差走査熱量計(パーキンエルマー社製、型番:DSC−800型)にて窒素気流下に50℃から285℃まで毎分100℃の割合で昇温させ、285℃で2分間保持した後、毎分100℃の割合で50℃まで降温させることにより、水分の影響を排除する。次に、50℃から285℃まで毎分20℃の割合で昇温させ、285℃で2分間保持した後、毎分10℃の割合で50℃まで降温させたときに、50℃から285℃まで毎分20℃の割合で昇温させる工程における発熱ピークの頂点を、「昇温時の結晶化ピーク温度」とする。 The crystallization peak temperature at the time of raising the temperature means the temperature measured as follows. First, a preform body formed by injection molding a polyester resin is cut into round slices with a pipe cutter, the surface is removed, and then the sample is cut into a size of 4 mm × 4 mm. Next, after the mass of the sample is precisely weighed, the sample is sealed in a standard aluminum sample pan for DSC manufactured by PerkinElmer Co., Ltd. The temperature is raised from 50 ° C. to 285 ° C. at a rate of 100 ° C. per minute, held at 285 ° C. for 2 minutes, and then lowered to 50 ° C. at a rate of 100 ° C. per minute to eliminate the influence of moisture. Next, when the temperature was raised from 50 ° C. to 285 ° C. at a rate of 20 ° C. per minute, held at 285 ° C. for 2 minutes, and then lowered to 50 ° C. at a rate of 10 ° C. per minute, the temperature was lowered from 50 ° C. to 285 ° C. The peak of the exothermic peak in the step of raising the temperature at a rate of 20 ° C. per minute is defined as the "crystallization peak temperature at the time of raising the temperature".

このようなメカニカルリサイクルポリエステル樹脂として、例えば、協栄産業株式会社製NABT7906(商品名)等のメカニカルリサイクルポリエチレンテレフタレート樹脂を挙げることができる。 As such a mechanically recycled polyester resin, for example, a mechanically recycled polyethylene terephthalate resin such as NABT7906 (trade name) manufactured by Kyoei Sangyo Co., Ltd. can be mentioned.

また、本実施形態のポリエステル樹脂製多重ボトル1において、内容器体3は、例えばその全量に対し40質量%以下の前記メカニカルリサイクルポリエステル樹脂を含有していることが好ましいが、バージンポリエステル樹脂からなるものでもよい。 Further, in the polyester resin multiple bottle 1 of the present embodiment, the inner container body 3 preferably contains, for example, 40% by mass or less of the mechanically recycled polyester resin with respect to the total amount thereof, but is made of a virgin polyester resin. It may be one.

次に、本実施形態のポリエステル樹脂製多重ボトル1の製造方法について説明する。 Next, a method for manufacturing the polyester resin multiple bottle 1 of the present embodiment will be described.

ポリエステル樹脂製多重ボトル1を製造するときには、まず、ポリエステル樹脂組成物の射出成形により、図3に示す内プリフォーム21と外プリフォーム22とを形成し、外プリフォーム22の内周側に内プリフォーム21を配置する。ここで、内プリフォーム21を形成するポリエステル樹脂組成物の組成は、内容器体3を形成するポリエステル樹脂組成物の組成と一致している。また、外プリフォーム21を形成するポリエステル樹脂組成物の組成は、外郭ボトル2を形成するポリエステル樹脂組成物の組成と一致している。 When manufacturing the polyester resin multiple bottle 1, first, the inner preform 21 and the outer preform 22 shown in FIG. 3 are formed by injection molding of the polyester resin composition, and the inner preform 22 is formed on the inner peripheral side of the outer preform 22. The preform 21 is arranged. Here, the composition of the polyester resin composition forming the inner preform 21 is consistent with the composition of the polyester resin composition forming the inner container body 3. Further, the composition of the polyester resin composition forming the outer preform 21 is consistent with the composition of the polyester resin composition forming the outer bottle 2.

内プリフォーム21は、内口部13と、内口部13の下方に連接され内口部13よりも外径が小さい有底円筒状の内胴部23とにより形成される。内口部13は、内容器体3の内口部13と同一形状であり、同一の構成には同一の符号を付して詳細な説明を省略する。 The inner preform 21 is formed by an inner mouth portion 13 and a bottomed cylindrical inner body portion 23 which is connected below the inner mouth portion 13 and has an outer diameter smaller than that of the inner mouth portion 13. The inner opening portion 13 has the same shape as the inner opening portion 13 of the inner container body 3, and the same reference numerals are given to the same configurations, and detailed description thereof will be omitted.

外プリフォーム22は、外口部4と、外口部4の下方に連接された有底円筒状の外胴部24とにより形成される。外口部4は、外郭ボトル2の外口部4と同一形状であり、同一の構成には同一の符号を付して詳細な説明を省略する。 The outer preform 22 is formed by an outer opening portion 4 and a bottomed cylindrical outer body portion 24 connected below the outer opening portion 4. The outer port portion 4 has the same shape as the outer port portion 4 of the outer bottle 2, and the same reference numerals are given to the same configurations, and detailed description thereof will be omitted.

図3に示すように、内プリフォーム21の内口部13は外プリフォーム22の外口部4に挿着され、内プリフォーム21の内胴部23は外プリフォーム22の外胴部24の内部に配置される。このとき、延出部15が外プリフォーム22の外口部4の上方に延出し、鍔部16が外プリフォーム22の外口部4の上端面に当接して係止される。これにより、内プリフォーム21の内口部13は、外プリフォーム22の外口部4の内側に確実に位置決めされる。 As shown in FIG. 3, the inner mouth portion 13 of the inner preform 21 is inserted into the outer mouth portion 4 of the outer preform 22, and the inner body portion 23 of the inner preform 21 is the outer body portion 24 of the outer preform 22. It is placed inside. At this time, the extending portion 15 extends above the outer opening portion 4 of the outer preform 22, and the flange portion 16 abuts on the upper end surface of the outer opening portion 4 of the outer preform 22 and is locked. As a result, the inner opening portion 13 of the inner preform 21 is reliably positioned inside the outer opening portion 4 of the outer preform 22.

次に、図4A〜図4Cを参照して、本実施形態のポリエステル樹脂製多重ボトル1のブロー成形について説明する。 Next, the blow molding of the polyester resin multiple bottle 1 of the present embodiment will be described with reference to FIGS. 4A to 4C.

本実施形態において使用するブロー成形装置は周知のものであり、図4A〜図4Cにおいて要部を示すように、金型31と、ブローノズル32と、ストレッチロッド33とを備えている。 The blow molding apparatus used in the present embodiment is well known, and includes a mold 31, a blow nozzle 32, and a stretch rod 33, as shown in FIGS. 4A to 4C.

金型31は、外郭ボトル2の肩部5、上胴部6、中胴部7、下胴部8、底部9に沿う形状の成形部34と、外プリフォーム22の外口部4のサポートリング11の上方を露出させて支持する支持開口部35とを備えている。金型31は図示しない割型構造とされており、左右側と底部側とで分割することによって成形後のポリエステル樹脂製多重ボトル1が脱型できるようになっている。 The mold 31 supports a molded portion 34 having a shape along the shoulder portion 5, upper body portion 6, middle body portion 7, lower body portion 8, and bottom portion 9 of the outer bottle 2, and the outer mouth portion 4 of the outer preform 22. It is provided with a support opening 35 that exposes and supports the upper part of the ring 11. The mold 31 has a split mold structure (not shown), and the polyester resin multiple bottle 1 after molding can be removed by dividing the mold 31 into a left and right side and a bottom side.

ブローノズル32は、図示しない昇降手段により昇降され、Oリング36を介して内プリフォーム21の上端面に気密に当接する。ブローノズル32にはストレッチロッド33が挿通され、ストレッチロッド33の外周面とブローノズル32の内周面との間には、図示しない加圧空気供給手段に接続された気体通路37が形成されている。 The blow nozzle 32 is raised and lowered by an elevating means (not shown), and airtightly contacts the upper end surface of the inner preform 21 via the O-ring 36. A stretch rod 33 is inserted through the blow nozzle 32, and a gas passage 37 connected to a pressurized air supply means (not shown) is formed between the outer peripheral surface of the stretch rod 33 and the inner peripheral surface of the blow nozzle 32. There is.

ストレッチロッド33は、図示しない進退駆動手段によってブロー成形時に前進される。尚、図4Aにおいては、ストレッチロッド33がブローノズル32の先端から突出しているが、ストレッチロッド33は未使用時には引き込まれてブローノズル32の内方(図中上方)に収納されている。 The stretch rod 33 is advanced during blow molding by an advancing / retreating driving means (not shown). In FIG. 4A, the stretch rod 33 protrudes from the tip of the blow nozzle 32, but the stretch rod 33 is pulled in when not in use and is housed inside the blow nozzle 32 (upper part in the drawing).

上述の構成のブロー成形装置によって、ポリエステル樹脂製多重ボトル1を製造するときには、図4Aに示すように、内プリフォーム21を外プリフォーム22の内周側に挿着し、外プリフォーム22を金型31にセットした後、内プリフォーム21にブローノズル32を接続する。尚、内プリフォーム21及び外プリフォーム22は、金型31にセットされるに先立ってブロー成形可能な温度に加熱される。 When the polyester resin multiple bottle 1 is manufactured by the blow molding apparatus having the above configuration, the inner preform 21 is inserted into the inner peripheral side of the outer preform 22 and the outer preform 22 is inserted as shown in FIG. 4A. After setting in the mold 31, the blow nozzle 32 is connected to the inner preform 21. The inner preform 21 and the outer preform 22 are heated to a temperature at which blow molding is possible prior to being set in the mold 31.

次いで、図4Bに示すようにブローノズル32の気体通路37から内プリフォーム21内に加圧空気を導入し、同時にストレッチロッド33を下方に伸長させる。これにより、内プリフォーム21が膨張して未膨張状態の外プリフォーム22の内面に密着する。 Next, as shown in FIG. 4B, pressurized air is introduced into the inner preform 21 from the gas passage 37 of the blow nozzle 32, and at the same time, the stretch rod 33 is extended downward. As a result, the inner preform 21 expands and comes into close contact with the inner surface of the outer preform 22 in the unexpanded state.

続いて、図4Bに示す状態から、更に内プリフォーム21内に加圧空気を導入しつつ、ストレッチロッド33を下方に伸長させると、膨張した内プリフォーム21の内胴部23により外プリフォーム22の外胴部24が広げられ、図4Cに示すように、金型31の成形部34により外郭ボトル2の肩部5、上胴部6、中胴部7、下胴部8、底部9の形状に成形される。また、内プリフォーム21の内胴部23は、外郭ボトル2の肩部5、上胴部6、中胴部7、下胴部8、底部9の内面形状に沿う形状に成形される。この結果、図1及び図2に示す合成樹脂製多重ボトル1が得られる。 Subsequently, from the state shown in FIG. 4B, when the stretch rod 33 is extended downward while further introducing pressurized air into the inner preform 21, the outer preform is formed by the inner body portion 23 of the expanded inner preform 21. The outer body portion 24 of 22 is expanded, and as shown in FIG. 4C, the shoulder portion 5, the upper body portion 6, the middle body portion 7, the lower body portion 8, and the bottom portion 9 of the outer bottle 2 are formed by the molding portion 34 of the mold 31. It is molded into the shape of. Further, the inner body portion 23 of the inner preform 21 is formed into a shape that follows the inner surface shape of the shoulder portion 5, the upper body portion 6, the middle body portion 7, the lower body portion 8, and the bottom portion 9 of the outer bottle 2. As a result, the synthetic resin multiple bottle 1 shown in FIGS. 1 and 2 is obtained.

本発明の外殻ボトルおよび内容器体はいずれもポリエステル樹脂からなるため、ブロー成形過程で密着する傾向があるが、外殻ボトルと内容器体との間に、プリフォーム積層段階で、所望によりポリエステル樹脂製容器どうしの密着性を抑える効果を有する剥離剤、或いは離型剤からなる第3の層を設けてブロー成形することができる。かくすることにより、その後の使用段階での外殻ボトルと内容器体との剥離をより容易に、スムースに行うことができる。 Since both the outer shell bottle and the inner container body of the present invention are made of polyester resin, they tend to adhere to each other in the blow molding process. However, if desired, at the preform laminating stage between the outer shell bottle and the inner container body. Blow molding can be performed by providing a third layer made of a release agent or a mold release agent having an effect of suppressing the adhesion between the polyester resin containers. By doing so, the outer shell bottle and the inner container body can be peeled off more easily and smoothly in the subsequent use stage.

1…ポリエステル樹脂製多重ボトル、 2…外郭ボトル、 3…内容器体、 21…内プリフォーム、 22…外プリフォーム。 1 ... Polyester resin multiple bottle, 2 ... Outer bottle, 3 ... Inner container body, 21 ... Inner preform, 22 ... Outer preform.

Claims (6)

外郭ボトルと、該外郭ボトルの内部に配設される内容器体とからなるポリエステル樹脂製多重ボトルにおいて、
少なくとも該外郭ボトルはその全量に対し60質量%以上のメカニカルリサイクルポリエステル樹脂を含有し、
該外郭ボトルは、円筒状外口部と、該外口部に連接する肩部と、該肩部に連接する胴部と、該胴部に連接し内周側でボトル内の膨出する凹部を有する底部とを備え、外圧に対して原形復帰可能であり、
該内容器体は、該外郭ボトルの該円筒状外口部の内周側に配設される円筒状内口部と、該内口部に連接し該外郭ボトルの内面形状に沿う形状の内容器体本体とを備え、外圧により変形可能であり、
該外口部と該内口部との間に形成されて該外郭ボトルと該内容器体との間に外気を導入する通気路とを備えることを特徴とするポリエステル樹脂製多重ボトル。
In a polyester resin multiplex bottle composed of an outer bottle and an inner container body arranged inside the outer bottle.
At least the outer bottle contains 60% by mass or more of mechanically recycled polyester resin based on the total amount thereof.
The outer bottle has a cylindrical outer mouth portion, a shoulder portion connected to the outer mouth portion, a body portion connected to the shoulder portion, and a concave portion connected to the body portion and bulging inside the bottle on the inner peripheral side. With a bottom that has a bottom, it can be restored to its original shape against external pressure,
The inner container body has a cylindrical inner mouth portion arranged on the inner peripheral side of the cylindrical outer mouth portion of the outer bottle, and a shape that is connected to the inner mouth portion and follows the inner surface shape of the outer bottle. Equipped with the main body of the body, it can be deformed by external pressure,
A polyester resin multiplex bottle formed between the outer mouth portion and the inner mouth portion and provided with a ventilation path for introducing outside air between the outer bottle and the inner container body.
請求項1記載のポリエステル樹脂製多重ボトルにおいて、前記内容器体はその全量に対し40質量%以下の前記メカニカルリサイクルポリエステル樹脂を含有することを特徴とするポリエステル樹脂製多重ボトル。 The polyester resin multiplex bottle according to claim 1, wherein the inner container contains 40% by mass or less of the mechanically recycled polyester resin with respect to the total amount thereof. 請求項1記載のポリエステル樹脂製多重ボトルにおいて、前記内容器体はバージンポリエステル樹脂からなることを特徴とするポリエステル樹脂製多重ボトル。 The polyester resin multiple bottle according to claim 1, wherein the inner container body is made of a virgin polyester resin. 請求項1〜請求項3のいずれか1項記載のポリエステル樹脂製多重ボトルにおいて、前記メカニカルリサイクルポリエステル樹脂は、固有粘度が0.7以上であり、Lab色表示系における黄変度bが9以下であることを特徴とするポリエステル樹脂製多重ボトル。 In the polyester resin multiple bottle according to any one of claims 1 to 3, the mechanically recycled polyester resin has an intrinsic viscosity of 0.7 or more and a yellowing degree b of 9 or less in the Lab color display system. A polyester resin multiple bottle characterized by being. 請求項1〜請求項4のいずれか1項記載のポリエステル樹脂製多重ボトルにおいて、前記メカニカルリサイクルポリエステル樹脂は、昇温時の結晶化ピーク温度が145℃以下であることを特徴とするポリエステル樹脂製多重ボトル。 In the polyester resin multiple bottle according to any one of claims 1 to 4, the mechanically recycled polyester resin is made of a polyester resin having a crystallization peak temperature of 145 ° C. or lower at the time of temperature rise. Multiple bottles. 外郭ボトルと、該外郭ボトルの内側に配設される内容器体とからなり、少なくとも該外郭ボトルはその全量に対し60質量%以上のメカニカルリサイクルポリエステル樹脂を含有するポリエステル樹脂製多重ボトルの製造方法であって、
前記メカニカルリサイクルポリエステル樹脂を含有するポリエステル樹脂組成物の射出成形により形成された外プリフォームの内周側に、ポリエステル樹脂組成物の射出成形により形成された内プリフォームを配置した状態でブロー成形することを特徴とするポリエステル樹脂製多重ボトルの製造方法。
A method for producing a polyester resin multiple bottle, which comprises an outer bottle and an inner container body arranged inside the outer bottle, and at least the outer bottle contains 60% by mass or more of mechanically recycled polyester resin with respect to the total amount thereof. And
Blow molding is performed with the inner preform formed by injection molding of the polyester resin composition arranged on the inner peripheral side of the outer preform formed by injection molding of the polyester resin composition containing the mechanically recycled polyester resin. A method for manufacturing a multiple bottle made of polyester resin, which is characterized by this.
JP2020107657A 2020-06-23 2020-06-23 Polyester resin multiplex bottle and manufacturing method thereof Pending JP2020152455A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2020107657A JP2020152455A (en) 2020-06-23 2020-06-23 Polyester resin multiplex bottle and manufacturing method thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2020107657A JP2020152455A (en) 2020-06-23 2020-06-23 Polyester resin multiplex bottle and manufacturing method thereof

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
JP2016096020A Division JP2017202853A (en) 2016-05-12 2016-05-12 Polyester resin multiple bottle and method for producing the same

Publications (1)

Publication Number Publication Date
JP2020152455A true JP2020152455A (en) 2020-09-24

Family

ID=72557589

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2020107657A Pending JP2020152455A (en) 2020-06-23 2020-06-23 Polyester resin multiplex bottle and manufacturing method thereof

Country Status (1)

Country Link
JP (1) JP2020152455A (en)

Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0639906A (en) * 1991-05-27 1994-02-15 Keisuke Ito Multi-layer molded container and its manufacture
JPH07304123A (en) * 1994-05-13 1995-11-21 Toppan Printing Co Ltd Multilayreed plastic container fitted with label
JPH0899395A (en) * 1994-09-30 1996-04-16 Toppan Printing Co Ltd Multilayered resin container
JPH10337770A (en) * 1997-06-05 1998-12-22 Toyo Seikan Kaisha Ltd Multilayer preform with recovery polyester resin layer, its manufacture, and multilayer container molded from the preform
JPH1177744A (en) * 1997-09-11 1999-03-23 Toyo Seikan Kaisha Ltd Preparation of multilayer preform having recovered polyester resin layer and multilayer preform
JPH11192657A (en) * 1997-12-29 1999-07-21 Nihon Yamamura Glass Co Ltd Multi-layer preform, its manufacture, and multi-layer bottle
JP2004511358A (en) * 2000-09-05 2004-04-15 アドバンスド プラスティックス テクノロジーズ リミテッド Multilayer containers and preforms with barrier properties using recycled materials
JP2004148616A (en) * 2002-10-30 2004-05-27 Toyo Seikan Kaisha Ltd Preform and biaxially stretched container produced by using preform
JP2011256328A (en) * 2010-06-11 2011-12-22 Toyo Seikan Kaisha Ltd Recycled polyester-containing polyester structure and method for manufacturing the same
JP2014046966A (en) * 2012-08-31 2014-03-17 Yoshino Kogyosho Co Ltd Biaxial stretch blow-molded container
JP2014198422A (en) * 2013-03-29 2014-10-23 株式会社 資生堂 Injection stretch blow molded bottle and method for manufacturing the same
JP2015224070A (en) * 2014-05-29 2015-12-14 キョーラク株式会社 Delamination container

Patent Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0639906A (en) * 1991-05-27 1994-02-15 Keisuke Ito Multi-layer molded container and its manufacture
JPH07304123A (en) * 1994-05-13 1995-11-21 Toppan Printing Co Ltd Multilayreed plastic container fitted with label
JPH0899395A (en) * 1994-09-30 1996-04-16 Toppan Printing Co Ltd Multilayered resin container
JPH10337770A (en) * 1997-06-05 1998-12-22 Toyo Seikan Kaisha Ltd Multilayer preform with recovery polyester resin layer, its manufacture, and multilayer container molded from the preform
JPH1177744A (en) * 1997-09-11 1999-03-23 Toyo Seikan Kaisha Ltd Preparation of multilayer preform having recovered polyester resin layer and multilayer preform
JPH11192657A (en) * 1997-12-29 1999-07-21 Nihon Yamamura Glass Co Ltd Multi-layer preform, its manufacture, and multi-layer bottle
JP2004511358A (en) * 2000-09-05 2004-04-15 アドバンスド プラスティックス テクノロジーズ リミテッド Multilayer containers and preforms with barrier properties using recycled materials
JP2004148616A (en) * 2002-10-30 2004-05-27 Toyo Seikan Kaisha Ltd Preform and biaxially stretched container produced by using preform
JP2011256328A (en) * 2010-06-11 2011-12-22 Toyo Seikan Kaisha Ltd Recycled polyester-containing polyester structure and method for manufacturing the same
JP2014046966A (en) * 2012-08-31 2014-03-17 Yoshino Kogyosho Co Ltd Biaxial stretch blow-molded container
JP2014198422A (en) * 2013-03-29 2014-10-23 株式会社 資生堂 Injection stretch blow molded bottle and method for manufacturing the same
JP2015224070A (en) * 2014-05-29 2015-12-14 キョーラク株式会社 Delamination container

Similar Documents

Publication Publication Date Title
JP2017202853A (en) Polyester resin multiple bottle and method for producing the same
EP0316167B1 (en) Combination of synthetic resin bottle and closure therefor
CA2686500C (en) Integrally blow-moulded bag-in-container having interface vents opening to the atmosphere at location adjacent to bag's mouth; preform for making it; and processes for producing the preform and bag-in-container
EP1305219B1 (en) Container base structure
EP3375592B1 (en) Container
US8962114B2 (en) Compression molded preform for forming invertible base hot-fill container, and systems and methods thereof
JPS6071207A (en) Multilayer preform for elongation blow molding and its manufacture
JP6712490B2 (en) Blow-molded multiple bottle manufacturing method
EP3375593A1 (en) Method for forming a container with a plastic liner and fibre-based shell by blow molding, method of fabrication and preform
US9884714B2 (en) Container provided with an invertible diaphragm and a central portion of greater thickness
EP3206956B1 (en) Container with base multi-function
JP2011504860A (en) High temperature filling container
JP2020152455A (en) Polyester resin multiplex bottle and manufacturing method thereof
JP2016117170A (en) Production method of beer composite container, composite preform, beer composite container, inside label member and plastic member
GB2104825A (en) Blow moulding
CN112789163A (en) Multilayer bottle
CN108883562B (en) Method for manufacturing container by liquid blow molding
JP2019042995A (en) Laminated preform, container, manufacturing method of laminated preform, and manufacturing method of container
JP2018188190A (en) Composite container and manufacturing method thereof
WO2010109775A1 (en) Plastic container, preform, method for producing plastic container, and preform mold
JP7130915B2 (en) Composite container
JPH11292076A (en) Laminate container whose inner layer is peelable, and molding method thereof
JP2020059225A (en) Method for manufacturing synthetic resin blow-molded multiplex bottle
US20210245416A1 (en) Stretch blow moulding method for manufacturing a plastic container and a plastic container which is manufactured in a stretch blow moulding method
JP7148899B2 (en) Composite container manufacturing method

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20200623

A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20210514

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20210615

A601 Written request for extension of time

Free format text: JAPANESE INTERMEDIATE CODE: A601

Effective date: 20210804

A521 Request for written amendment filed

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20211013

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20220301

A601 Written request for extension of time

Free format text: JAPANESE INTERMEDIATE CODE: A601

Effective date: 20220421

A02 Decision of refusal

Free format text: JAPANESE INTERMEDIATE CODE: A02

Effective date: 20220830