JP5072239B2 - Composite spout - Google Patents

Composite spout Download PDF

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JP5072239B2
JP5072239B2 JP2006059277A JP2006059277A JP5072239B2 JP 5072239 B2 JP5072239 B2 JP 5072239B2 JP 2006059277 A JP2006059277 A JP 2006059277A JP 2006059277 A JP2006059277 A JP 2006059277A JP 5072239 B2 JP5072239 B2 JP 5072239B2
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spout
peripheral surface
cylindrical sleeve
inner peripheral
composite
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JP2007238105A (en
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高博 黒沢
公生 竹内
勝己 橋本
雄平 米川
修 石井
仁臣 松谷
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Nippon Closures Co Ltd
Toyo Seikan Kaisha Ltd
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Toyo Seikan Kaisha Ltd
Japan Crown Cork Co Ltd
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Description

本発明は、製造時に機能性樹脂をそなえたスリーブが射出成形時にスパウト本体と溶着しにくい部位に対して溶着を促進する複合スパウトに関する。   The present invention relates to a composite spout that promotes welding to a portion where a sleeve having a functional resin at the time of manufacture hardly adheres to a spout body during injection molding.

近年、高機能食品等を充填し、図３に示す注出具（ 以下スパウトという） から注出するスパウト付きパウチや紙容器等の容器において、酸素による内容物の変質やフレーバー性の低下を防止するため、パウチ、紙容器等の容器本体のみならず、スパウトに対しても酸素透過量がきわめて少ないことが求められている。そのため、スパウトに対してスパウトの内壁にガスバリアー性又は酸素吸収性に優れた遮断体としての筒状スリーブ１０が装着されている複合スパウト１がある。 In recent years, high-functional foods and the like have been filled to prevent deterioration of contents and deterioration of flavor due to oxygen in spouted pouches and paper containers, etc., which are poured out from the pouring tool shown in FIG. 3 (hereinafter referred to as spout). For this reason, it is required that the oxygen permeation amount is extremely small not only for a container body such as a pouch or a paper container but also for a spout. Therefore, there is a composite spout 1 in which a cylindrical sleeve 10 as a blocking body excellent in gas barrier property or oxygen absorption property is attached to the inner wall of the spout with respect to the spout.

図４に示す筒状スリーブ１０は、複合スパウト１のスパウト本体２の内側にインサート成形によって装着されている。筒状スリーブ１０は、多層からなり、機能性樹脂層１０ａを間にして内側に内層１０ｂを配設し外側に外層１０ｃを配設し、これらは機能性樹脂層１０ａと内層１０ｂとの間及び機能性樹脂層１０ａと外層１０ｃとの間に接着剤層１０ｄを介在させて接着されている。 A cylindrical sleeve 10 shown in FIG. 4 is attached to the inside of the spout body 2 of the composite spout 1 by insert molding. The cylindrical sleeve 10 is composed of multiple layers, and an inner layer 10b is disposed on the inner side with the functional resin layer 10a therebetween, and an outer layer 10c is disposed on the outer side. These are disposed between the functional resin layer 10a and the inner layer 10b and The functional resin layer 10a and the outer layer 10c are bonded with an adhesive layer 10d interposed therebetween.

図５は、筒状スリーブ１０を備えた複合スパウト１の射出成形装置による成形方法を示す。
図５のＡに示すように、スパウトは雄型２１と雌型３１とによって成形され、雄型２１には、基端側から先端側まで同一径で形成された円柱形状のコアー２２が設けられ、コアー２２の周囲には筒状スリーブ１０が装着されている。雌型３１は左右に開く分割型であり、内周面の形状が図３に示すスパウト本体２の外周面に対応する形状に形成される。
図５のＣに示すように、一方の雌右型３１ｂには図示しない射出成形機より溶融樹脂が射出されるゲート３３が接続されている。 FIG. 5 shows a molding method of the composite spout 1 having the cylindrical sleeve 10 by the injection molding apparatus.
As shown in A of FIG. 5, the spout is formed by the male 21 and female 31, male die 21, the core 22 is provided with a cylindrical shape formed with the same diameter from the proximal side to the distal side A cylindrical sleeve 10 is mounted around the core 22. Female 31 is a split type that opens right and left, the shape of the inner peripheral surface is formed in a shape corresponding to the outer peripheral surface of the spout body 2 shown in FIG.
As shown in C of FIG. 5, the gate 33 of the molten resin from an injection molding machine (not shown) on one of the female right die 31b is injected is connected.

こうした構成により、雄型２１のコアー２２を雌型３１に差し込んで金型を閉じ、図５のＣに示すように、ゲート３３からキャビティ３２内に溶融樹脂が射出されることによって、複合スパウト１
のスパウト本体２となる部分が形成され、スパウト本体２の内側に筒状スリーブ１０が備えられた複合スパウト１が形成される。スパウト本体２と筒状スリーブ１０の接着は、スパウト本体２の材料である溶融樹脂の熱による熱溶着によって接着される。
特開２００１−２１３４５５号公報 Such arrangement closing the mold by inserting a core 22 of the male 21 into the female mold 31, as shown in C in FIG. 5, by the molten resin is injected from the gate 33 into the cavity 32, the composite spout 1
The part which becomes the spout main body 2 is formed, and the composite spout 1 in which the cylindrical sleeve 10 is provided inside the spout main body 2 is formed. The spout body 2 and the cylindrical sleeve 10 are bonded together by heat welding of the molten resin, which is the material of the spout body 2, with heat.
JP 2001-213455 A

しかしながら、形成された複合スパウト１の排出開口６側の端部は、肉厚が薄く容量が小さいため少量の溶融樹脂しか充填されない。そのため、溶融樹脂の熱が筒状スリーブ１０に充分伝わらず、図３に示すように、筒状スリーブ１０とスパウト本体２の接着状態が悪くなることがあり、スパウト本体２から筒状スリーブ１０が剥離してしまうことがある。
筒状スリーブ１０の剥離は、容器内の内容物がスパウト本体２と筒状スリーブ１０との間に回り込んでしまう。また、筒状スリーブ１０の端面１０ｇが容器内に露出することによって、機能性樹脂層１０ａから機能性樹脂が溶出し、内容物を充填した際に、衛生上の問題や、或いは内容物のフレーバー低下等を招く。
また、コアー２２の基端側から先端側まで、コアー２２の横断面が同一径である場合は、図５のＤに示すように、射出成形機から射出される樹脂の流動圧によって、筒状スリーブ１０がコアー２２をガイド材として、コアー２２の軸方向基端側へずれてしまうことがある。このように、筒状スリーブ１０がコアー２２の基台２３面に当接したような場合は、筒状スリーブ１０の端面１０ｇが複合スパウト１の内部で露出してしまい、上述したように、機能性樹脂層１０ａから酸素吸収剤等の材料が溶出され、機能性樹脂が効率良く作用しないことがある。
本発明は、このような事情に鑑みてなされたもので、スパウト本体と筒状スリーブの接着面とを確実に接着できる複合スパウトを提供することを目的とする。 However, the end portion on the discharge opening 6 side of the formed composite spout 1 has a small thickness and a small capacity, so that only a small amount of molten resin is filled. Therefore, the heat of the molten resin is not sufficiently transmitted to the cylindrical sleeve 10, and the adhesive state between the cylindrical sleeve 10 and the spout body 2 may deteriorate as shown in FIG. May peel.
When the cylindrical sleeve 10 is peeled off, the contents in the container wrap around between the spout body 2 and the cylindrical sleeve 10. Further, when the end surface 10g of the cylindrical sleeve 10 is exposed in the container, the functional resin is eluted from the functional resin layer 10a, and when the contents are filled, the sanitary problem or the flavor of the contents It causes a decrease.
Further, from the base end side of the core 22 to the tip end, if the cross section of the core 22 are the same diameter, as shown in D in FIG. 5, by the flow pressure of the resin injected from the injection molding machine, cylindrical The sleeve 10 may shift to the axial base end side of the core 22 using the core 22 as a guide material. As described above, when the cylindrical sleeve 10 is in contact with the surface of the base 23 of the core 22, the end face 10g of the cylindrical sleeve 10 is exposed inside the composite spout 1, and as described above, In some cases, a material such as an oxygen absorbent is eluted from the functional resin layer 10a, and the functional resin does not work efficiently.
This invention is made | formed in view of such a situation, and it aims at providing the composite spout which can adhere | attach the spout main body and the adhesive surface of a cylindrical sleeve reliably.

本発明の複合スパウトは、上記目的を達成するために、機能性樹脂層が中間層として配設されている筒状スリーブを中子として射出成形型のコアー部材に被嵌した状態でスパウト本体を射出成形することによって、該スパウト本体の内周面に該筒状スリーブが実質上その内周面のみを露呈させて埋設された形態に成形された複合スパウトにして、該スパウトの排出端部を構成する該スパウト本体の片端部において、該スパウト本体の外周面の、該筒状スリーブの片端部に対応する部位には、半径方向外方に突出した外周面付加部が環状に形成されている。
また、本発明の複合スパウトは、機能性樹脂層が中間層として配設されている筒状スリーブを中子として射出成形型のコアー部材に被嵌した状態でスパウト本体を射出成形することによって、該スパウト本体の内周面に該筒状スリーブが実質上その内周面のみを露呈させて埋設された形態に成形された複合スパウトにして、該スパウトの排出端部を構成している該スパウト本体の片端部において、該スパウト本体の内周面には、周方向の少なくとも一部において、該筒状スリーブの片端部の内周面を覆う内周面付加部が形成され、該筒状スリーブの片端部に対応する部位の該スパウト本体の外周面には、半径方向外方に突出した外周面付加部が環状に形成されている。
そして、上記複合スパウトの内周面付加部は環状に形成するとよい。
さらに、上記複合スパウトの内周面付加部は間隔を空けて複数形成することができる。
また、該スパウトがスパウトの基端部を構成するスパウト本体の他端部側から溶融樹脂を射出することにより成形されているとよい。 In order to achieve the above object, the composite spout of the present invention has a spout body in a state of being fitted to an injection mold core member with a cylindrical sleeve having a functional resin layer disposed as an intermediate layer as a core. by injection molding, and the composite spout cylindrical sleeve on the inner circumferential surface is formed substantially on the inner peripheral surface only embedded by exposing the form of the spout body, the discharge end of the spout An outer peripheral surface additional portion projecting radially outward is formed in an annular shape at a portion corresponding to the one end portion of the cylindrical sleeve of the outer peripheral surface of the spout main body at one end portion of the spout main body to be configured. .
Further, the composite spout of the present invention is obtained by injection molding the spout body in a state of being fitted to the core member of the injection mold with a cylindrical sleeve having a functional resin layer disposed as an intermediate layer as a core. The spout which forms the discharge end of the spout by forming a composite spout in which the cylindrical sleeve is embedded in the inner peripheral surface of the spout body so that only the inner peripheral surface is exposed. At one end portion of the main body, an inner peripheral surface additional portion that covers the inner peripheral surface of the one end portion of the cylindrical sleeve is formed on the inner peripheral surface of the spout main body at least in a circumferential direction. On the outer peripheral surface of the spout body at a portion corresponding to one end of the outer peripheral surface, an outer peripheral surface additional portion projecting radially outward is formed in an annular shape .
And the internal peripheral surface addition part of the said composite spout is good to form cyclically | annularly.
Furthermore, the inner peripheral surface addition part of the said composite spout can be formed in multiple numbers at intervals.
Moreover, it is a good test is molded by said spout injecting molten resin from the other end of the Luz Pauto body to constitute the base end portion of the spout.

本発明の複合スパウトは、スパウト本体の内周面に筒状スリーブを有し、該スパウト本体の外周面の筒状スリーブの片端部に対応する部位に、半径方向外方に突出した外周面付加部が環状に形成されている。
又、本発明の複合スパウトは、スパウト本体の内周面に筒状スリーブを有し、該スパウト本体の内周面に、周方向の少なくとも一部において、該筒状スリーブの片端部の内周面を覆う内周面付加部が形成され、該スパウト本体の外周面の該筒状スリーブの片端部に対応する部位に、半径方向外方に突出した外周面付加部が環状に形成されている。
このように、射出成形時において、スパウト本体と筒状スリーブとの溶着部に外周面付加部、或いは内周面付加部及び外周面付加部を形成することによって、溶融樹脂の熱がそれらを溶着するために充分に蓄えられているので、確実にスパウト本体と筒状スリーブとの接触面を溶着することができると共に、内容物を充填した際の筒状スリーブの機能性樹脂層からの機能性樹脂の溶出が防止され、衛生上の問題や、或いは内容物のフレーバー低下等を防止することができる。 The composite spout of the present invention has a cylindrical sleeve on the inner peripheral surface of the spout main body, and an outer peripheral surface projecting radially outward is added to a portion corresponding to one end of the cylindrical sleeve on the outer peripheral surface of the spout main body. The part is formed in an annular shape.
Further, the composite spout of the present invention, has a cylindrical sleeve on the inner peripheral surface of the spout body, on the inner peripheral surface of the spout body in at least a portion of the circumferential direction, the inner circumference of one end portion of the tubular sleeve inner peripheral surface adding section which covers the surface is formed, a portion corresponding to one end portion of the tubular sleeve of the outer peripheral surface of the spout body, the outer peripheral surface additional portion protruding radially outward is formed in an annular .
Thus, at the time of injection molding , by forming the outer peripheral surface additional portion, or the inner peripheral surface additional portion and the outer peripheral surface additional portion at the weld portion between the spout body and the cylindrical sleeve, the heat of the molten resin welds them. The contact surface between the spout body and the cylindrical sleeve can be surely welded and the functionality from the functional resin layer of the cylindrical sleeve when the contents are filled. The elution of the resin is prevented, and it is possible to prevent a sanitary problem or a decrease in the flavor of the contents.

以下、本発明の実施形態における複合スパウトについて、図面を参照しながら説明する。
なお、従来例で説明した筒状スリーブ１０は、図４に示すように本実施の形態の筒状スリーブ１０と同じ構造の接着層を含んで５層からなる多層筒状スリーブ１０であるので、その詳細な説明を省略する。 Hereinafter, with the composite Supau preparative in an embodiment of the present invention will be described with reference to the drawings.
Incidentally, the cylindrical sleeve 10 described in the conventional example, since a multilayer tubular sleeve 10 made of five layers including an adhesive layer having the same structure as the tubular sleeve 10 of the present embodiment, as shown in FIG. 4, Detailed description thereof is omitted.

図１は、本発明に係る複合スパウト１の断面図である。図に示すように、複合スパウト１は、スパウト本体２と筒状スリーブ１０とから構成されている。複合スパウト１は、内周面側に内容物が流入出し、スパウト本体２と筒状スリーブ１０とで形成されるほぼ円柱形状の導管孔３を形成している。そして、導管孔３の上部には内周面側に図示しない封止キャップのシール部が当接する内周シール面５を形成し、その上端部には排出開口６を形成している。
スパウト本体２の外周面側には、排出開口６端側に封止キャップの雌ねじが螺着する雄ねじ７がほぼ螺旋状に形成され、雄ねじ７の下部には封止キャップに設けられるタンパーエビデントバンド（図示せず）と係止する係止部１５とこの係止部１５と間隔を空けてフランジ１６が形成されている。フランジ１６は、複合スパウト１の搬送時における把持、支持など機能的な役割を果たす。そして、フランジ１６の下部にはパウチを取付ける取付部１７を形成し、この取付部１７によってパウチと複合スパウト１の接続部のシール性が維持される。 FIG. 1 is a cross-sectional view of a composite spout 1 according to the present invention. As shown in the figure, the composite spout 1 is composed of a spout body 2 and a cylindrical sleeve 10. The composite spout 1 has a substantially cylindrical conduit hole 3 formed by the spout body 2 and the cylindrical sleeve 10 through which the contents flow into and out of the inner peripheral surface. An upper peripheral portion is formed with an inner peripheral seal surface 5 that a seal portion of a sealing cap (not shown) abuts on the inner peripheral surface side, and a discharge opening 6 is formed at the upper end thereof.
On the outer peripheral surface side of the spout body 2, a male screw 7 into which the female screw of the sealing cap is screwed is formed in a substantially spiral shape on the end side of the discharge opening 6, and a tamper evidence provided on the sealing cap is provided below the male screw 7. A locking portion 15 that locks with a band (not shown) and a flange 16 are formed at a distance from the locking portion 15. The flange 16 plays a functional role such as holding and supporting the composite spout 1 during conveyance. A mounting portion 17 for attaching the pouch is formed at the lower portion of the flange 16, and the sealing performance of the connecting portion between the pouch and the composite spout 1 is maintained by the mounting portion 17.

スパウト本体２の内周面には、筒状スリーブ１０が装着されている。筒状スリーブ１０は、軸方向の一端側１０ｅから他端側１０ｆまで同一肉厚であって、筒状スリーブ１０の外周面がスパウト本体２の内周面に溶着されている。スパウト本体２の片端部６ａ（図１参照）側に位置する筒状スリーブ１０の片端部である一端側１０ｅには、断面が三角形状で導管孔３の中心側に突出する突部８を導管孔３の周方向に環状に形成している。
突部８は、導管孔（及び筒状スリーブ１０）３の軸方向と直角に交差する規制面８ａと排出開口６側に向く傾斜面（台形状円錐面若しくはテーパー面）８ｂ、すなわち排出開口６側に向かって広がる傾斜面８ｂが形成されている。 A cylindrical sleeve 10 is attached to the inner peripheral surface of the spout body 2. The cylindrical sleeve 10 has the same thickness from one end side 10 e to the other end side 10 f in the axial direction, and the outer peripheral surface of the cylindrical sleeve 10 is welded to the inner peripheral surface of the spout body 2. The one end 10e which is one end portion of the cylindrical sleeve 10 located at one end portion 6 a of the spout body 2 in (see FIG. 1) side, a projection 8 in cross-section protrudes toward the center of the conduit hole 3 in triangular An annular shape is formed in the circumferential direction of the conduit hole 3.
The protrusion 8 includes a regulating surface 8a that intersects the axial direction of the conduit hole (and the cylindrical sleeve 10) 3 at a right angle and an inclined surface (trapezoidal conical surface or tapered surface) 8b that faces the discharge opening 6 side, that is, the discharge opening 6. An inclined surface 8b extending toward the side is formed.

そして、複合スパウト１のスパウト本体２の薄肉部６ａの外周面に外周面付加部１２を形成している。外周面付加部１２は、筒状スリーブ１０の一端側１０ｅに対応する部位に、スパウト本体２の外周面に環状に形成されている。外周面付加部１２の高さは、図示しない封止キャップの雌ねじと干渉しないように雄ねじ７のねじ山の高さよりも低い高さで形成する必要がある。
このように、スパウト本体２の外周面に付加部１２を形成することにより、溶融樹脂に蓄えられた熱量でスパウト本体２と筒状スリーブ１０との接触面を確実に溶着できる。 And the outer peripheral surface addition part 12 is formed in the outer peripheral surface of the thin part 6a of the spout main body 2 of the composite spout 1. The outer peripheral surface adding portion 12 is formed in an annular shape on the outer peripheral surface of the spout body 2 at a portion corresponding to the one end side 10 e of the cylindrical sleeve 10. The height of the outer peripheral surface adding portion 12 needs to be formed at a height lower than the height of the thread of the male screw 7 so as not to interfere with the female screw of the sealing cap (not shown).
In this way, by forming the additional portion 12 on the outer peripheral surface of the spout body 2, the contact surface between the spout body 2 and the cylindrical sleeve 10 can be reliably welded with the amount of heat stored in the molten resin.

また、図２に示す複合スパウト１は、図１に示す外周面付加部１２に加えて、筒状スリーブ１０の一端側１０ｅの内周面には傾斜面８ｂから連続して延びる内周面付加部９を形成している。この内周面付加部９は、筒状スリーブ１０の内周面から筒状スリーブ１０の半径方向内側に突出するように形成され、筒状スリーブ１０の周方向全体に渡って同一断面形状で形成されている。内周面付加部９が形成される位置は、筒状スリーブ１０の一端側１０ｅの内周面縁部から、スパウト本体２のほぼ雄ねじ７が形成される部位（以下、薄肉部と称す）６ａに対応する部分で、スパウト本体２の排出開口６側の肉厚が薄い箇所である。
内周面付加部９の形状は、傾斜面８ｂに連続する湾曲面９ａと筒状スリーブ１０の他端側１０ｆへ筒状スリーブ１０の半径方向外側へ広がる台形状の円錐面９ｂを有している。円錐面９ｂの軸方向長さは、湾曲面９ａの長さに比べて長く、なだらかな傾斜角によって形成されている。
従って、筒状スリーブ１０の一端側１０ｅ及び端面１０ｇは、スパウト本体２の薄肉部６ａ、突部８及び内周面付加部９とで被覆され、筒状スリーブ１０の機能性樹脂層１０ａが、導管孔３の内部空間に露出しないように形成されている。なお、突部８と内周面付加部９の境界は連続してつながっている。
このように、内周面付加部９、外周面付加部１２を、筒状スリーブ１０の内周面とスパウト本体２の外周面にそれぞれ形成することにより、スパウト本体２と筒状スリーブ１０との接触面を確実に溶着でき、図１に示す複合スパウト１よりもスパウト本体２と筒状スリーブ１０との接触面に熱を付加することができ、より確実に接触面を溶着できる。 In addition to the outer peripheral surface adding portion 12 shown in FIG. 1, the composite spout 1 shown in FIG. 2 is provided with an inner peripheral surface extending continuously from the inclined surface 8b on the inner peripheral surface of the one end side 10e of the cylindrical sleeve 10. Part 9 is formed. The inner peripheral surface adding unit 9 is formed to protrude from the inner peripheral surface of the cylindrical sleeve 10 radially inwardly of the tubular sleeve 10, formed in the same cross-sectional shape throughout the circumferential direction of the cylindrical sleeve 10 Has been. The position where the inner peripheral surface additional portion 9 is formed is a portion (hereinafter referred to as a thin portion) 6a where the male screw 7 of the spout body 2 is formed from the inner peripheral surface edge of the one end side 10e of the cylindrical sleeve 10. Is a portion where the thickness of the spout body 2 on the side of the discharge opening 6 is thin.
Shape of the inner peripheral surface adding unit 9 has a trapezoidal conical surface 9b of the other end 10f of the curved surface 9a and the cylindrical sleeve 10 that is continuous with the inclined surface 8b extends radially outwardly of the tubular sleeve 10 Yes. The axial length of the conical surface 9b is longer than the length of the curved surface 9a, and is formed with a gentle inclination angle.
Therefore, the one end side 10e and the end surface 10g of the cylindrical sleeve 10 are covered with the thin portion 6a, the protrusion 8 and the inner peripheral surface additional portion 9 of the spout body 2, and the functional resin layer 10a of the cylindrical sleeve 10 is It is formed so as not to be exposed to the internal space of the conduit hole 3. Note that the boundary between the protrusion 8 and the inner peripheral surface addition portion 9 is continuously connected.
Thus, by forming the inner peripheral surface additional portion 9 and the outer peripheral surface additional portion 12 on the inner peripheral surface of the cylindrical sleeve 10 and the outer peripheral surface of the spout main body 2, respectively, the spout body 2 and the cylindrical sleeve 10 are provided. The contact surface can be reliably welded, heat can be applied to the contact surface between the spout body 2 and the cylindrical sleeve 10 as compared with the composite spout 1 shown in FIG. 1, and the contact surface can be more reliably welded.

また、上記実施の形態で説明した図２に示す複合スパウト１において、筒状スリーブ１０の内周面に形成した内周面付加部９は、連続して環状に形成するのがよいが、連続的に形成することなく周方向に間隔を空けて複数形成してもよい。Further, in the composite spout 1 shown in FIG. 2 described in the above embodiment, the inner peripheral surface additional portion 9 formed on the inner peripheral surface of the cylindrical sleeve 10 is preferably formed continuously in an annular shape. A plurality of them may be formed at intervals in the circumferential direction without forming them.

筒状スリーブ１０の他端側１０ｆに位置する複合スパウト１には、導管孔３と筒状スリーブ１０の接合面から段状に導管孔３の内方に突出する小径部１８を形成し、小径部１８と筒状スリーブ１０の境界部には導管孔３の軸方向に対して直角に交差する保持面１８ａを形成している。導管孔３の半径方向に対する保持面１８ａの幅と、筒状スリーブ１０の肉厚は同じ長さになるように形成されているが、少なくとも図４に示す筒状スリーブ１０の機能性樹脂層１０ａが保持面１８ａに被覆されている必要がある。こうして、スパウト本体２の内孔の内周面に筒状スリーブ１０が装着され、筒状スリーブ１０の機能性樹脂層１０ａが、導管孔３の内部空間に露出しないように構成されている。 The composite spout 1 located on the other end side 10f of the cylindrical sleeve 10 is formed with a small diameter portion 18 that protrudes inwardly from the joint surface between the conduit hole 3 and the cylindrical sleeve 10 in a step shape. A holding surface 18 a that intersects at right angles to the axial direction of the conduit hole 3 is formed at the boundary between the portion 18 and the cylindrical sleeve 10. The width of the holding surface 18a with respect to the radial direction of the conduit bore 3, although the thickness of the tubular sleeve 10 is formed to have the same length, the tubular sleeve 10 shown in at least FIG functional resin layer 10a Needs to be covered with the holding surface 18a. Thus, the cylindrical sleeve 10 is mounted on the inner peripheral surface of the inner hole of the spout body 2, and the functional resin layer 10 a of the cylindrical sleeve 10 is configured not to be exposed to the internal space of the conduit hole 3.

スパウト本体２を構成する樹脂としては、熱可塑性樹脂であるオレフィン系樹脂、例えば低密度ポリエチレン（ＬＤＰＥ）、中密度ポリエチレン（ＭＤＰＥ）、高密度ポリエチレン（ＨＬＤＥ）、線状低密度ポリエチレン（ＬＬＤＰＥ）、線状超低密度ポリエチレン（ＬＶＬＤＰＥ）等のポリエチレン（ＰＥ）、ポリプロピレン（ＰＰ）、エチレン−プロピレン共重合体、ポリブデン−１、エチレン−ブテン−１共重合体、プロピレン−ブテン−１共重合体、エチレン−プロピレン−ブテン−１共重合体、エチレン−酢酸ビニル共重合体（ＥＶＡ）、イオン架橋オレフィン共重合体（アイオノマー）、或いはこれらのブレンド物が採用できる。また、熱可塑性ポリエステル樹脂全般についても用いることができ、エチレンテレフタレート系熱可塑性ポリエステル（ＰＥＴ）、ポリブチレンテレフタレート（ＰＢＴ）、ポリエチレンナフタレート（ＰＥＮ）等の他のポリエステル、或いはこれらとポリカーボネートやポリアリレート等とのブレンド物も採用できる。   As the resin constituting the spout body 2, an olefin resin which is a thermoplastic resin, for example, low density polyethylene (LDPE), medium density polyethylene (MDPE), high density polyethylene (HLDE), linear low density polyethylene (LLDPE), Polyethylene (PE) such as linear ultra-low density polyethylene (LVLDPE), polypropylene (PP), ethylene-propylene copolymer, polybutene-1, ethylene-butene-1 copolymer, propylene-butene-1 copolymer, An ethylene-propylene-butene-1 copolymer, an ethylene-vinyl acetate copolymer (EVA), an ion-crosslinked olefin copolymer (ionomer), or a blend thereof can be used. It can also be used for all thermoplastic polyester resins, and other polyesters such as ethylene terephthalate thermoplastic polyester (PET), polybutylene terephthalate (PBT), polyethylene naphthalate (PEN), and these and polycarbonate and polyarylate. Blends with these can also be used.

筒状スリーブ１０の機能性樹脂層１０ａは、用途に応じて、例えばガスバリアー性樹脂、酸素吸収性樹脂、または水分遮断性樹脂等の所定の機能を有する樹脂が使用される。なお、ガスバリアー性樹脂としては、例えば酸素バリアー層として用いる場合の好適な例としては、ビニルアルコール単位の含有量が４０〜８５モル％、特に５５〜８０モル％、ケン化度が９６モル％以上、特に９９モル％以上のエチレン−ビニルアルコール共重合体が挙げられる。また、他の酸素ガスバリアー性樹脂としては、ナイロン樹脂、特に、ナイロン６、ナイロン８、ナイロン１１、ナイロン６，６、ナイロン６，１０、ナイロン１０，６、ナイロン６／６，６共重合体等の脂肪族ナイロン、ポリメタキシリレンアジパミド等の部分芳香属ナイロン、さらにはポリグリコール酸樹脂が挙げられる。そして、これらの酸素ガスバリアー性は、内容物の保存性及び保香性の点から、酸素透過係数が５．５×１０−１２ｃｃ・ｃｍ／ｃｍ２・ｓｅｃ・ｃｍＨｇ（２３℃、０％ＲＨ）以下であることが好ましい。 For the functional resin layer 10a of the cylindrical sleeve 10, a resin having a predetermined function such as a gas barrier resin, an oxygen-absorbing resin, or a moisture blocking resin is used depending on the application. As a gas barrier resin, for example, as a suitable example when used as an oxygen barrier layer, the content of vinyl alcohol units is 40 to 85 mol%, particularly 55 to 80 mol%, and the saponification degree is 96 mol%. As mentioned above, especially 99 mol% or more of ethylene-vinyl alcohol copolymer is mentioned. Other oxygen gas barrier resins include nylon resins, particularly nylon 6, nylon 8, nylon 11, nylon 6,6, nylon 6,10, nylon 10,6, nylon 6 / 6,6 copolymer. Aliphatic nylon such as polymetaxylylene adipamide, partially aromatic nylon, and polyglycolic acid resin. These oxygen gas barrier properties are such that the oxygen permeability coefficient is 5.5 × 10 −12 cc · cm / cm 2 · sec · cmHg (23 ° C., 0%) from the viewpoint of the storage stability and fragrance retention of the contents. RH) or less.

他方、前記機能性樹脂層１０ａを酸素吸収性樹脂層とする場合は、前記ガスバリアー性樹脂層に酸素吸収性を付加しても良く、前記ガスバリアー性樹脂層の樹脂自体が酸素吸収性を有する構成としても良い。このような樹脂としては、例えば樹脂の酸化反応を利用したものが挙げられ、酸化性の材料、例えばポリブタジエン、ポリイソプレン、ポリプロピレン、エチレン・酸化炭素重合体、ナイロン−６、ナイロン−１２、メタキシリレンジアミン（ＭＸ）ナイロンのようなポリアミド類に、酸化触媒としてコバルト、ロジウム、銅等の遷移金属を含む有機酸塩類や、ペンゾフェン、アセトフェン、クロロケトン類のような光増感剤を加えたものが使用できる。これらの酸素吸収材料を使用した場合は、紫外線、電子線のような高エネルギー線を照射することによって、一層の効果を発現させることもできる。   On the other hand, when the functional resin layer 10a is an oxygen-absorbing resin layer, oxygen absorption may be added to the gas barrier resin layer, and the resin of the gas barrier resin layer itself has oxygen absorption. It is good also as a structure to have. Examples of such resins include those utilizing the oxidation reaction of resins, such as oxidizing materials such as polybutadiene, polyisoprene, polypropylene, ethylene / carbon oxide polymers, nylon-6, nylon-12, metaxylylene. What added the organic acid salts containing transition metals such as cobalt, rhodium, copper and photosensitizers such as benzophene, acetophene, and chloroketones to polyamides such as range amine (MX) nylon. Can be used. When these oxygen-absorbing materials are used, further effects can be exhibited by irradiating with high energy rays such as ultraviolet rays and electron beams.

また、前記ガスバリアー性樹脂層の樹脂に酸化可能な有機成分を含有させて、ガスバリアー性樹脂層の酸化劣化によるガスバリアー性の低下を生じることなく酸素吸収性を発現しても良い。このような酸化有機成分としては、ポリエンから誘導されるポリエン重合体が好ましく、カルボン酸基、カルボン酸無水物基、水酸基が導入されていることが好ましい。これらの官能基としては、アクリル酸、メタクリル酸、マレイン酸、不飽和カルボン酸、無水マレイン酸、不飽和カルボン酸の無水物等が挙げられ、遷移金属触媒としてはコバルトが好ましい。   In addition, an oxidizable organic component may be included in the resin of the gas barrier resin layer so as to exhibit oxygen absorption without causing a decrease in gas barrier property due to oxidative degradation of the gas barrier resin layer. As such an oxidized organic component, a polyene polymer derived from polyene is preferable, and a carboxylic acid group, a carboxylic anhydride group, or a hydroxyl group is preferably introduced. Examples of these functional groups include acrylic acid, methacrylic acid, maleic acid, unsaturated carboxylic acid, maleic anhydride, and unsaturated carboxylic acid anhydride, and the transition metal catalyst is preferably cobalt.

また、前記ガスバリアー性樹脂層を構成する樹脂に酸素吸収剤を配合しても良く、このような酸素吸収剤としては、還元性を有する金属粉、例えば、還元性鉄粉、還元性亜鉛、還元性錫粉、金属低位酸化物、還元性金属化合物の一種又は二種以上を組み合わせたものを主成分としたものが挙げられる。これらは必要に応じて、アルカリ金属、アルカリ土類金属の水酸化物、炭酸塩、亜硫酸塩、有機酸塩、ハロゲン化物、さらに活性炭、活性アルミナのような助剤とも組み合わせて使用することができる。或いは、多価フェノールを骨格内に有する高分子化合物、例えば、多価フェノール含有フェノール・アルデヒド樹脂等が挙げられる。   In addition, an oxygen absorbent may be blended in the resin constituting the gas barrier resin layer, and as such an oxygen absorbent, a metal powder having reducibility, such as reducible iron powder, reducible zinc, Examples thereof include those containing, as a main component, a combination of one or more of reducing tin powder, metal lower oxide, and reducing metal compound. These can be used in combination with alkali metals, alkaline earth metal hydroxides, carbonates, sulfites, organic acid salts, halides, and also auxiliary agents such as activated carbon and activated alumina as necessary. . Or the high molecular compound which has polyhydric phenol in frame | skeleton, for example, polyhydric phenol containing phenol aldehyde resin, etc. are mentioned.

さらに、機能性樹脂層１０ａを水分遮断性樹脂層とする場合は、水分遮断性樹脂としては、環状オレフィン系共重合体、オレフィンと環状オレフィンとの非晶質乃至低結晶性共重合体（ＣＯＣ）が使用できる。前記のガスバリアー性樹脂、酸素吸収性樹脂等には、充填剤、着色剤、耐熱安定剤、耐候安定剤、酸化防止剤、老化防止剤、光安定剤、紫外線吸収剤、帯電防止剤、金属石鹸やワックス等の滑剤、改質剤を配合できる。   Further, when the functional resin layer 10a is a moisture blocking resin layer, the moisture blocking resin may be a cyclic olefin copolymer, an amorphous or low crystalline copolymer of olefin and cyclic olefin (COC). ) Can be used. Examples of the gas barrier resin and oxygen absorbing resin include fillers, colorants, heat stabilizers, weathering stabilizers, antioxidants, anti-aging agents, light stabilizers, ultraviolet absorbers, antistatic agents, and metals. Lubricants and modifiers such as soap and wax can be added.

筒状スリーブ１０の内層１０ｂ及び外層１０ｃの材料としては、例えば、スパウト本体２と同じ熱可塑性樹脂であるオレフィン系樹脂が用いることができ、スリーブ１０と前記スパウト本体２との熱融着性の点から、少なくとも前記内層１０ｂは、スパウト本体２のオレフィン系樹脂よりも低融点のオレフィン系樹脂を用いるのが好ましい。 As a material of the inner layer 10b and the outer layer 10c of the cylindrical sleeve 10, for example, an olefin resin, which is the same thermoplastic resin as the spout body 2, can be used, and the heat sealability between the sleeve 10 and the spout body 2 can be used. In view of this, at least the inner layer 10b preferably uses an olefin resin having a melting point lower than that of the olefin resin of the spout body 2.

本発明の実施の形態による複合スパウトの断面図である。It is a cross-sectional view of a composite spout according to the embodiment of the present invention. 本発明の他の実施の形態による複合スパウトの断面図である。It is sectional drawing of the composite spout by other embodiment of this invention . 従来例による複合スパウトの断面図である。It is sectional drawing of the composite spout by a prior art example. 本発明及び従来例による筒状スリーブの斜視図及び断面図である。It is the perspective view and sectional drawing of the cylindrical sleeve by this invention and a prior art example. 従来の複合スパウトの射出成形装置による成形工程を示し、Ａは雄型のコアーにスリーブを装着した状態の断面図、Ｂは雄型と雌型を閉じた状態の断面図、Ｃはゲートから金型に溶融樹脂を充填した状態の断面図、Ｄはスリーブがコアーの軸方向へずれた状態の断面図である。The molding process by the injection molding apparatus of the conventional composite spout is shown, A is a sectional view in a state where a sleeve is mounted on a male core, B is a sectional view in a state in which a male mold and a female mold are closed, and C is a gold from a gate. Sectional drawing of the state in which the mold is filled with molten resin, D is a sectional view of the state in which the sleeve is displaced in the axial direction of the core.

１ 複合スパウト
２ スパウト本体
８ 突部
８ｂ 傾斜面
９ 内周面付加部
９ａ 湾曲面
９ｂ 円錐面
１０ 筒状スリーブ
１０ｅ 一端側
１０ｆ他端側
１２ 外周面付加部
２１ 雄型
２２ コアー
２２ａ大径部
２２ｂ小径部
２２ｃ傾斜面
２５ 内周面付加部形成凹部
２５ａ湾曲面
２５ｂ円錐面
３１ 雌型 DESCRIPTION OF SYMBOLS 1 Composite spout 2 Spout main body 8 Protrusion part 8b Inclined surface 9 Inner peripheral surface addition part 9a Curved surface 9b Conical surface 10 Cylindrical sleeve 10e One end side 10f The other end side 12 outer peripheral surface addition part 21 Male type 22 Core 22a Large diameter part 22b Small diameter portion 22c inclined surface 25 inner peripheral surface additional portion forming recess 25a curved surface 25b conical surface 31 female mold

Claims (5)

機能性樹脂層が中間層として配設されている筒状スリーブを中子として射出成形型のコアー部材に被嵌した状態でスパウト本体を射出成形することによって、スパウト本体の内周面に該筒状スリーブが実質上その内周面のみを露呈させて埋設された形態に成形された複合スパウトにして、
該スパウトの排出端部を構成する該スパウト本体の片端部において、該スパウト本体の外周面の、該筒状スリーブの片端部に対応する部位には、半径方向外方に突出した外周面付加部が環状に形成されている、ことを特徴とする複合スパウト。 The spout body is injection-molded with the cylindrical sleeve having the functional resin layer disposed as an intermediate layer in the core member of the injection mold, and the cylinder is formed on the inner peripheral surface of the spout body. A composite spout formed into a shape in which a cylindrical sleeve is embedded so that substantially only its inner peripheral surface is exposed,
In one end portion of the spout main body constituting the discharge end portion of the spout, an outer peripheral surface additional portion protruding outward in the radial direction at a portion of the outer peripheral surface of the spout main body corresponding to the one end portion of the cylindrical sleeve A composite spout characterized in that is formed in an annular shape . 機能性樹脂層が中間層として配設されている筒状スリーブを中子として射出成形型のコアー部材に被嵌した状態でスパウト本体を射出成形することによって、該スパウト本体の内周面に該筒状スリーブが実質上その内周面のみを露呈させて埋設された形態に成形された複合スパウトにして、
該スパウトの排出端部を構成している該スパウト本体の片端部において、該スパウト本体の内周面には、周方向の少なくとも一部において、該筒状スリーブの片端部の内周面を覆う内周面付加部が形成され、該筒状スリーブの片端部に対応する部位の該スパウト本体の外周面には、半径方向外方に突出した外周面付加部が環状に形成されている、ことを特徴とする複合スパウト。 By injection-molding the spout body with the cylindrical sleeve having the functional resin layer disposed as an intermediate layer as a core and being fitted onto the core member of the injection mold, the spout body is formed on the inner peripheral surface of the spout body. A composite spout molded into a form in which a cylindrical sleeve is embedded by exposing only its inner peripheral surface,
In one end portion of the spout main body constituting the discharge end portion of the spout, the inner peripheral surface of the spout main body covers the inner peripheral surface of the one end portion of the cylindrical sleeve at least partially in the circumferential direction. An inner peripheral surface additional portion is formed, and an outer peripheral surface additional portion protruding radially outward is formed in an annular shape on the outer peripheral surface of the spout body at a portion corresponding to one end portion of the cylindrical sleeve. Composite spout characterized by 該内周面付加部が環状に形成されている請求項２に記載の複合スパウト。The composite spout according to claim 2, wherein the inner peripheral surface additional portion is formed in an annular shape. 該内周面付加部は周方向に間隔をおいて複数形成されている請求項２に記載の複合スパウト。The composite spout according to claim 2, wherein a plurality of the inner peripheral surface additional portions are formed at intervals in the circumferential direction. 該スパウトがスパウトの基端部を構成するスパウト本体の他端部側から溶融樹脂を射出することにより成形されている、請求項１〜４のいずれか１項に記載の複合スパウト。 The spout gas Pauto of which the other end of absence Pauto body to constitute the base end portion is formed by injecting molten resin, the composite spout according to any one of claims 1-4.
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