JP2022098246A - Synthetic resin container and manufacturing method thereof - Google Patents

Synthetic resin container and manufacturing method thereof Download PDF

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Publication number
JP2022098246A
JP2022098246A JP2020211665A JP2020211665A JP2022098246A JP 2022098246 A JP2022098246 A JP 2022098246A JP 2020211665 A JP2020211665 A JP 2020211665A JP 2020211665 A JP2020211665 A JP 2020211665A JP 2022098246 A JP2022098246 A JP 2022098246A
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synthetic resin
mouth portion
resin container
closing member
container body
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貴彦 寺田
Takahiko Terada
和也 新田
Kazuya Nitta
理成 大宮
Michinari Omiya
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Bioworks
Bioworks Corp
Naturelab Co Ltd
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Bioworks
Bioworks Corp
Naturelab Co Ltd
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Priority to JP2020211665A priority Critical patent/JP2022098246A/en
Priority to PCT/JP2021/041012 priority patent/WO2022137849A1/en
Publication of JP2022098246A publication Critical patent/JP2022098246A/en
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    • 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
    • B05B11/10—Pump arrangements for transferring the contents from the container to a pump chamber by a sucking effect and forcing the contents out through the dispensing nozzle
    • B05B11/1042—Components or details
    • B05B11/1043—Sealing or attachment arrangements between pump and container
    • B05B11/1046—Sealing or attachment arrangements between pump and container the pump chamber being arranged substantially coaxially to the neck of the container
    • B05B11/1047—Sealing or attachment arrangements between pump and container the pump chamber being arranged substantially coaxially to the neck of the container the pump being preassembled as an independent unit before being mounted on the container
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D1/00—Containers having bodies formed in one piece, e.g. by casting metallic material, by moulding plastics, by blowing vitreous material, by throwing ceramic material, by moulding pulped fibrous material, by deep-drawing operations performed on sheet material
    • B65D1/02—Bottles or similar containers with necks or like restricted apertures, designed for pouring contents
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D39/00—Closures arranged within necks or pouring openings or in discharge apertures, e.g. stoppers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D41/00—Caps, e.g. crown caps or crown seals, i.e. members having parts arranged for engagement with the external periphery of a neck or wall defining a pouring opening or discharge aperture; Protective cap-like covers for closure members, e.g. decorative covers of metal foil or paper
    • B65D41/02—Caps or cap-like covers without lines of weakness, tearing strips, tags, or like opening or removal devices
    • B65D41/28—Caps combined with stoppers
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K5/00—Use of organic ingredients
    • C08K5/04—Oxygen-containing compounds
    • C08K5/10—Esters; Ether-esters
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K5/00—Use of organic ingredients
    • C08K5/04—Oxygen-containing compounds
    • C08K5/10—Esters; Ether-esters
    • C08K5/101—Esters; Ether-esters of monocarboxylic acids
    • C08K5/103—Esters; Ether-esters of monocarboxylic acids with polyalcohols
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L101/00—Compositions of unspecified macromolecular compounds
    • C08L101/16—Compositions of unspecified macromolecular compounds the macromolecular compounds being biodegradable
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L67/00—Compositions of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Compositions of derivatives of such polymers
    • C08L67/04—Polyesters derived from hydroxycarboxylic acids, e.g. lactones
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W90/00—Enabling technologies or technologies with a potential or indirect contribution to greenhouse gas [GHG] emissions mitigation
    • Y02W90/10—Bio-packaging, e.g. packing containers made from renewable resources or bio-plastics

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Ceramic Engineering (AREA)
  • Closures For Containers (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Biological Depolymerization Polymers (AREA)
  • Containers Having Bodies Formed In One Piece (AREA)

Abstract

To provide a synthetic resin container suppressed in filled liquid leakage even in a high temperature environment, without performing a process of increasing heat resistance.SOLUTION: A synthetic resin container 1 includes a container body 10 with a bottle shape having a cylindrical mouth 14, and a cap 20 with a pump for closing an opening 10a positioned at an upper end of the mouth 14. The cap 20 with the pump is positioned at an inner peripheral side of the mouth 14 in a state of closing the opening 10a, and has a support part 22a2 supporting the mouth 14 from the inner peripheral side.SELECTED DRAWING: Figure 2

Description

本発明は、液体を収容するための合成樹脂容器及び合成樹脂容器の製造方法に関するものである。 The present invention relates to a synthetic resin container for accommodating a liquid and a method for manufacturing the synthetic resin container.

液体を収容するための従来の合成樹脂容器としては、特許文献１に開示されているように、射出成型等によって試験管の形状に形成されたプリフォームを、ブロー成型によってボトル形状に形成することによって容器本体を形成し、容器本体の口部の端部に位置する開口部をキャップによって閉鎖するようにしたものが知られている。 As a conventional synthetic resin container for accommodating a liquid, as disclosed in Patent Document 1, a preform formed in the shape of a test tube by injection molding or the like is formed in a bottle shape by blow molding. It is known that the container body is formed by a cap, and the opening located at the end of the mouth portion of the container body is closed by a cap.

特許文献１の合成樹脂容器は、口部が、周方向にわたって、キャップを構成するインナーリング、コンタクトリング及びアウターリングと接触することによって、容器本体内の密封状態が保持されるようになっている。 In the synthetic resin container of Patent Document 1, the mouth portion is in contact with the inner ring, the contact ring, and the outer ring constituting the cap in the circumferential direction, so that the sealed state inside the container body is maintained. ..

特許文献１の合成樹脂容器は、高温（例えば、８５℃）の液体を充填することを可能とする耐熱性を向上させるために、容器本体の口部の開口端部側の結晶化度を高くする処理を行うことによって、液体の熱の影響による口部の変形を抑制し、容器本体内の密封状態を保持している。 The synthetic resin container of Patent Document 1 has a high crystallinity on the open end side of the mouth of the container body in order to improve the heat resistance that enables filling with a liquid at a high temperature (for example, 85 ° C.). By performing the treatment, the deformation of the mouth due to the influence of the heat of the liquid is suppressed, and the sealed state inside the container body is maintained.

一方、常温（例えば、２５℃）の液体が充填される合成樹脂容器は、耐熱性を必要としないため、非結晶状態の合成樹脂材料の容器本体及びキャップを用いることが可能となり、高温の液体が充填される合成樹脂容器と比較して、製造コストの低減を図ることが可能となる。 On the other hand, a synthetic resin container filled with a liquid at room temperature (for example, 25 ° C.) does not require heat resistance, so that a container body and a cap made of an amorphous synthetic resin material can be used, and a high temperature liquid can be used. It is possible to reduce the manufacturing cost as compared with the synthetic resin container filled with.

特開２０１７－７４７０５号公報Japanese Unexamined Patent Publication No. 2017-74705

しかしながら、常温の液体を収容するための合成樹脂容器は、輸送時または保管時に温度環境が高温（例えば、４５℃）となると、容器本体の口部が熱の影響を受けて収縮して変形する可能性がある。この場合に、従来の合成樹脂容器では、口部の開口部を閉鎖しているキャップが緩み、充填されている液体が漏洩するおそれがある。 However, in a synthetic resin container for accommodating a liquid at room temperature, when the temperature environment becomes high (for example, 45 ° C.) during transportation or storage, the mouth of the container body shrinks and deforms under the influence of heat. there is a possibility. In this case, in the conventional synthetic resin container, the cap closing the opening of the mouth may loosen and the filled liquid may leak.

本発明の目的とするところは、耐熱性を向上させる処理を行うことなく、高温の環境下においても充填された液体の漏洩を抑制することのできる合成樹脂容器及び合成樹脂容器の製造方法を提供することにある。 An object of the present invention is to provide a synthetic resin container and a method for manufacturing a synthetic resin container capable of suppressing leakage of a filled liquid even in a high temperature environment without performing a treatment for improving heat resistance. To do.

本発明の合成樹脂容器は、筒状の口部を有するボトル形状の容器本体と、前記口部の上端に位置する開口部を閉鎖する閉鎖部材と、を備えた合成樹脂容器であって、前記閉鎖部材は、前記開口部を閉鎖した状態で前記口部の内周側に位置し、前記口部を内周面側から支持する支持部を有している。 The synthetic resin container of the present invention is a synthetic resin container including a bottle-shaped container body having a tubular mouth portion and a closing member for closing an opening located at the upper end of the mouth portion. The closing member is located on the inner peripheral side of the mouth portion in a state where the opening is closed, and has a support portion that supports the mouth portion from the inner peripheral surface side.

また、本発明の合成樹脂容器は、前記閉鎖部材が、前記口部の外周側に係合する係合体と、前記係合体に係止され、前記容器本体内に収容された液体を吐出させるポンプ機構と、を有し、前記支持部は、前記ポンプ機構を構成するポンプハウジングに形成されている。 Further, in the synthetic resin container of the present invention, the closing member is engaged with an engaging body that engages with the outer peripheral side of the mouth portion, and a pump that is locked to the engaging body and discharges the liquid contained in the container body. It has a mechanism, and the support portion is formed in a pump housing constituting the pump mechanism.

また、本発明の合成樹脂容器は、前記閉鎖部材が、前記開口部を閉鎖する閉鎖部と、前記閉鎖部の外周側に設けられ、前記口部の外周側に係合する外周部を有し、前記支持部は、前記閉鎖部の下面側における前記外周部の径方向内側に設けられている。 Further, the synthetic resin container of the present invention has a closing portion in which the closing member closes the opening, and an outer peripheral portion provided on the outer peripheral side of the closed portion and engaged with the outer peripheral side of the mouth portion. The support portion is provided on the lower surface side of the closed portion on the radial inside of the outer peripheral portion.

また、本発明の合成樹脂容器は、前記容器本体及び前記閉鎖部材が、生分解性樹脂からなる。 Further, in the synthetic resin container of the present invention, the container body and the closing member are made of biodegradable resin.

また、本発明の合成樹脂容器は、前記生分解性樹脂が、ポリ乳酸を含むポリ乳酸樹脂である。 Further, in the synthetic resin container of the present invention, the biodegradable resin is a polylactic acid resin containing polylactic acid.

また、本発明の合成樹脂容器は、前記ポリ乳酸樹脂が、重量平均分子量が１０万以下のポリ乳酸、数平均分子量４０００以上４００００以下の分岐状ポリ乳酸、グリセリン脂肪酸エステル、アジピン酸エステル、ヒマシ油脂肪酸エステルからなる群より選択される可塑剤を含有し、前記可塑剤は、１質量パーセント以上５質量パーセント以下の割合で含まれている。 Further, in the synthetic resin container of the present invention, the polylactic acid resin is a polylactic acid having a weight average molecular weight of 100,000 or less, a branched polylactic acid having a number average molecular weight of 4000 or more and 40,000 or less, a glycerin fatty acid ester, an adipic acid ester, and castor oil. It contains a plasticizing agent selected from the group consisting of fatty acid esters, and the plasticizing agent is contained in a proportion of 1% by mass or more and 5% by mass or less.

また、本発明の合成樹脂容器は、前記ポリ乳酸樹脂が、重量平均分子量が５万以上３０万以下のポリＬ－乳酸を、１０質量パーセント以上１００質量パーセント以下の割合で含有している。 Further, in the synthetic resin container of the present invention, the polylactic acid resin contains polyL-lactic acid having a weight average molecular weight of 50,000 or more and 300,000 or less in a proportion of 10% by mass or more and 100% by mass or less.

また、本発明の合成樹脂容器は、前記閉鎖部材を形成する前記生分解性樹脂の結晶化度が４０パーセント以上である。 Further, in the synthetic resin container of the present invention, the crystallinity of the biodegradable resin forming the closing member is 40% or more.

また、本発明の合成樹脂容器は、前記口部が、上下方向にわたって同一の結晶化度を有している。 Further, in the synthetic resin container of the present invention, the mouth portion has the same crystallinity in the vertical direction.

また、本発明の合成樹脂容器は、前記口部の耐熱温度が４５℃未満の樹脂からなり、前記閉鎖部材の耐熱温度が４５℃以上の樹脂からなる。 Further, the synthetic resin container of the present invention is made of a resin having a heat resistant temperature of less than 45 ° C. for the mouth portion and a resin having a heat resistant temperature of 45 ° C. or higher for the closing member.

また、本発明の合成樹脂容器は、前記口部が、結晶化度が４０パーセント未満の樹脂からなり、前記閉鎖部材が、結晶化度が４０％以上の樹脂からなる。 Further, in the synthetic resin container of the present invention, the mouth portion is made of a resin having a crystallinity of less than 40%, and the closing member is made of a resin having a crystallinity of 40% or more.

また、本発明の合成樹脂容器の製造方法は、筒状の口部を有するボトル形状の容器本体と、前記口部の上端に位置する開口部を閉鎖する閉鎖部材と、を備えた合成樹脂容器の製造方法であって、射出成型によってプリフォームを形成するプリフォーム形成工程と、プリフォーム形成工程において形成されたプリフォームを、ブロー成型によって前記容器本体とする容器本体形成工程と、前記開口部を閉鎖した状態で前記口部の内周側に位置し、前記口部の内面を支持する支持部を有する閉鎖部材を、所定以上の結晶化度となるように形成する閉鎖部材形成工程と、を含む。 Further, the method for manufacturing a synthetic resin container of the present invention is a synthetic resin container including a bottle-shaped container body having a tubular mouth portion and a closing member for closing an opening located at the upper end of the mouth portion. The preform forming step of forming a preform by injection molding, the container body forming step of using the preform formed in the preform forming step as the container body by blow molding, and the opening. A closing member forming step of forming a closing member having a support portion that is located on the inner peripheral side of the mouth portion in a closed state and supports the inner surface of the mouth portion so as to have a crystallization degree of a predetermined value or higher. including.

また、本発明の合成樹脂容器の製造方法は、前記プリフォームにおいて前記口部が形成されており、前記容器本体形成工程において、前記口部が金型によって加熱されない。 Further, in the method for manufacturing a synthetic resin container of the present invention, the mouth portion is formed in the preform, and the mouth portion is not heated by the mold in the container body forming step.

本発明によれば、容器本体の口部が収縮して変形が生じる可能性のある高温の環境下においても、閉鎖部材の支持部によって口部が内周面側から支持され、口部の収縮による径方向内側への変形が規制され、閉鎖部材の緩みを抑制することが可能となる。 According to the present invention, even in a high temperature environment where the mouth portion of the container body may shrink and deform, the mouth portion is supported from the inner peripheral surface side by the support portion of the closing member, and the mouth portion shrinks. Deformation inward in the radial direction due to the above is restricted, and it becomes possible to suppress loosening of the closing member.

本発明の第１実施形態を示す合成樹脂容器の側面図である。It is a side view of the synthetic resin container which shows 1st Embodiment of this invention. 本発明の第１実施形態を示す合成樹脂容器の要部側面断面図である。It is sectional drawing of the main part of the synthetic resin container which shows 1st Embodiment of this invention. 本発明の第２実施形態を示す合成樹脂容器の要部側面断面図である。It is sectional drawing of the main part of the synthetic resin container which shows 2nd Embodiment of this invention. 本発明の第３実施形態を示す合成樹脂容器の要部側面断面図である。It is sectional drawing of the main part of the synthetic resin container which shows 3rd Embodiment of this invention.

＜第１実施形態＞
図１及び図２は、本発明の第１実施形態を示すものである。図１は、合成樹脂容器の側面図であり、図２は、合成樹脂容器の要部側面断面図である。 <First Embodiment>
1 and 2 show the first embodiment of the present invention. FIG. 1 is a side view of the synthetic resin container, and FIG. 2 is a side sectional view of a main part of the synthetic resin container.

本実施形態の合成樹脂容器１は、シャンプー、リンス、ボディソープ等の所謂トイレタリー用品の液体を収容するためのものであり、収容された液体を一定量吐出させることが可能なポンプ機能を有している。 The synthetic resin container 1 of the present embodiment is for accommodating liquids of so-called toiletry products such as shampoo, conditioner, and body soap, and has a pump function capable of discharging a constant amount of the contained liquids. ing.

この合成樹脂容器１は、図１に示すように、液体が収容される容器本体１０と、容器本体１０の上端部に設けられた開口部１０ａを閉鎖するための閉鎖部材としてのポンプ付きキャップ２０と、を備えている。 As shown in FIG. 1, the synthetic resin container 1 has a cap 20 with a pump as a closing member for closing the container body 10 in which a liquid is stored and the opening 10a provided at the upper end of the container body 10. And have.

ここで、容器本体１０及びポンプ付きキャップ２０は、それぞれ、微生物によって分解され、最終的に水及び二酸化炭素等を生じる生分解性樹脂によって形成されていてもよい。より詳細に説明すると、容器本体１０及びポンプ付きキャップ２０は、それぞれ、生分解性樹脂として、ポリ乳酸（ＰＬＡ）を主な成分として含むポリ乳酸樹脂からなっていてもよい。 Here, the container body 10 and the cap 20 with a pump may be formed of a biodegradable resin that is decomposed by microorganisms and finally produces water, carbon dioxide, and the like. More specifically, the container body 10 and the cap 20 with a pump may each be made of a polylactic acid resin containing polylactic acid (PLA) as a main component as a biodegradable resin.

ポリ乳酸樹脂は、重量平均分子量が５万以上３０万以下のポリＬ－乳酸を含むものである。ポリＬ－乳酸は、ポリ乳酸樹脂の全体に対して１０質量パーセント以上１００質量パーセント以下の割合で含まれている。 The polylactic acid resin contains polyL-lactic acid having a weight average molecular weight of 50,000 or more and 300,000 or less. PolyL-lactic acid is contained in a proportion of 10% by mass or more and 100% by mass or less with respect to the whole polylactic acid resin.

また、ポリ乳酸樹脂には、容器本体１０及びポンプ付きキャップ２０を成型する加工を容易にするとともに、柔軟性を付加するための可塑剤が添加されている。可塑剤は、重量平均分子量が１０万以下のポリ乳酸であってポリＬ－乳酸以外のポリ乳酸、数平均分子量４０００以上４００００以下の分岐状ポリ乳酸であってポリＬ－乳酸以外のポリ乳酸、グリセリン脂肪酸エステル、アジピン酸エステル、ヒマシ油脂肪酸エステルからなる群より選択されるものであり、ポリ乳酸樹脂の全体に対して１質量％以上５質量％以下の割合で添加されている。 Further, the polylactic acid resin is added with a plasticizer for facilitating the processing for molding the container body 10 and the cap 20 with a pump and for adding flexibility. The plasticizer is a polylactic acid having a weight average molecular weight of 100,000 or less and a polylactic acid other than polyL-lactic acid, and a branched polylactic acid having a number average molecular weight of 4000 or more and 40,000 or less and a polylactic acid other than polyL-lactic acid. It is selected from the group consisting of glycerin fatty acid ester, adipic acid ester, and castor oil fatty acid ester, and is added in a proportion of 1% by mass or more and 5% by mass or less with respect to the total polylactic acid resin.

容器本体１０は、内部が視認可能な透明なポリ乳酸樹脂によって形成される。容器本体１０は、図１に示すように、下端部に設けられた底部１１と、底部１１から上方に延びる角筒状の胴部１２と、胴部１２の上端から連続して上方に延びる肩部１３と、肩部１３の上端から上方に延びる円筒状の口部１４と、を有するボトル形状に形成されている。 The container body 10 is formed of a transparent polylactic acid resin whose inside is visible. As shown in FIG. 1, the container body 10 has a bottom portion 11 provided at the lower end portion, a square cylindrical body portion 12 extending upward from the bottom portion 11, and a shoulder extending continuously upward from the upper end portion of the body portion 12. It is formed in a bottle shape having a portion 13 and a cylindrical mouth portion 14 extending upward from the upper end of the shoulder portion 13.

口部１４は、上端に開口部１０ａが配置されており、ポンプ付きキャップ２０が着脱可能となっている。口部１４の外周面には、図２に示すように、ポンプ付きキャップ２０の後述するキャップ本体が螺合するネジ山１４ａが形成されている。 An opening 10a is arranged at the upper end of the mouth portion 14, and a cap 20 with a pump can be attached and detached. As shown in FIG. 2, a screw thread 14a into which the cap body of the cap 20 with a pump, which will be described later, is screwed is formed on the outer peripheral surface of the mouth portion 14.

ここで、容器本体１０は、射出成型によって上述のポリ乳酸樹脂からなる試験管の形状のプリフォームを形成し、プリフォームをブロー成型によってボトル形状に形成することにより製造される。 Here, the container body 10 is manufactured by forming a preform in the shape of a test tube made of the above-mentioned polylactic acid resin by injection molding, and forming the preform in the shape of a bottle by blow molding.

プリフォームを構成するポリ乳酸樹脂は、分子が規則的に配列されて結晶化した結晶部と、結晶化していない非晶部と、が混在している。ここで、合成樹脂は、合成樹脂の全容積に対する結晶部の割合を、結晶化度として表すことができる。ポリ乳酸樹脂は、ガラス転移温度以上で融点未満の温度で加熱処理を行い、結晶化度を高くすることによって、耐熱性を向上させることが可能となるが、本実施形態においてプリフォームを成型する際には加熱処理を行わない。 In the polylactic acid resin constituting the preform, a crystalline portion in which molecules are regularly arranged and crystallized and an amorphous portion in which the molecules are not crystallized are mixed. Here, in the synthetic resin, the ratio of the crystal part to the total volume of the synthetic resin can be expressed as the crystallinity. The polylactic acid resin can be heat-treated at a temperature equal to or higher than the glass transition temperature and lower than the melting point to increase the crystallinity, thereby improving the heat resistance. However, in the present embodiment, the preform is molded. In some cases, no heat treatment is performed.

また、プリフォームは、容器本体１０における口部１４が予め形成されており、プリフォームの口部１４以外の部分を金型に配置した状態でブロー成型が行われる。このため、プリフォームの口部１４以外の部分については、ブロー成型時に加熱された金型によって加熱されて結晶化度が高くなることにより耐熱性が向上するが、口部１４については、金型によって加熱されることはなく、耐熱性が向上することはない。そのため、口部１４の耐熱温度は、例えば、４５℃未満である。ここで、耐熱温度とは、熱による収縮等の変形が生じる前の上限の温度である。また、口部１４の結晶化度は、例えば、４０％未満である。容器本体１０の口部１４以外の部分は、結晶化度が４０％以上であることが好ましい。また、口部１４は、上下方向にわたって同一の結晶化度を有している。 Further, in the preform, the mouth portion 14 of the container body 10 is formed in advance, and blow molding is performed in a state where the portion other than the mouth portion 14 of the preform is arranged in the mold. For this reason, the parts other than the mouth portion 14 of the preform are heated by the mold heated at the time of blow molding to increase the crystallinity, so that the heat resistance is improved, but the mouth portion 14 is heated by the mold. It is not heated by, and the heat resistance is not improved. Therefore, the heat resistant temperature of the mouth portion 14 is, for example, less than 45 ° C. Here, the heat-resistant temperature is an upper limit temperature before deformation such as shrinkage due to heat occurs. Further, the crystallinity of the mouth portion 14 is, for example, less than 40%. The portion of the container body 10 other than the mouth portion 14 preferably has a crystallinity of 40% or more. Further, the mouth portion 14 has the same crystallinity in the vertical direction.

ポンプ付きキャップ２０は、図１に示すように、容器本体１０の口部１４に係合する係合体としてのキャップ本体２１と、キャップ本体２１に係止され、容器本体１０内に収容された液体を吐出させるためのポンプ機構２２と、を備えている。 As shown in FIG. 1, the cap 20 with a pump has a cap body 21 as an engaging body that engages with the mouth portion 14 of the container body 10 and a liquid that is locked to the cap body 21 and contained in the container body 10. It is provided with a pump mechanism 22 for discharging the water.

キャップ本体２１は、図２に示すように、中心軸を上下方向に向けた姿勢で口部１４に係合する円筒状に形成されている。キャップ本体２１は、上面にポンプ機構２２が挿入されるポンプ挿入孔２１ａが形成され、内周面に口部１４のネジ山１４ａに螺合する雌ネジ２１ｂが形成されている。キャップ本体２１は、ポンプ挿入孔２１ａの外周側に設けられ、容器本体１０の口部１４に螺合した状態で、ポンプ機構２２の後述するポンプハウジングのフランジ部に当接する当接部２１ｃを有している。 As shown in FIG. 2, the cap main body 21 is formed in a cylindrical shape that engages with the mouth portion 14 in a posture in which the central axis is oriented in the vertical direction. The cap body 21 has a pump insertion hole 21a on the upper surface into which the pump mechanism 22 is inserted, and a female screw 21b screwed into the thread 14a of the mouth portion 14 on the inner peripheral surface. The cap body 21 is provided on the outer peripheral side of the pump insertion hole 21a, and has an abutting portion 21c that abuts on the flange portion of the pump housing described later of the pump mechanism 22 in a state of being screwed into the mouth portion 14 of the container body 10. is doing.

ポンプ機構２２は、図２に示すように、キャップ本体２１のポンプ挿入孔２１ａに挿入されるポンプハウジング２２ａと、キャップ本体２１に対してポンプハウジング２２ａを固定するための固定部材２２ｂと、ポンプハウジング２２ａの上部側に接続され、液体を吐出させる際に使用者が押下操作を行う押下操作部２２ｃと、ポンプハウジング２２ａの下部側に接続され、容器本体１０に収容されている液体を吸い上げる吸上げチューブ２２ｄと、を有している。 As shown in FIG. 2, the pump mechanism 22 includes a pump housing 22a inserted into the pump insertion hole 21a of the cap body 21, a fixing member 22b for fixing the pump housing 22a to the cap body 21, and a pump housing. A pressing operation unit 22c that is connected to the upper side of the 22a and that the user performs a pressing operation when discharging the liquid, and a suction that is connected to the lower side of the pump housing 22a and sucks up the liquid contained in the container body 10. It has a tube 22d and.

ポンプ機構２２は、押下操作部２２ｃを下方に押し下げると、容器本体１０に収容された一定量の液体を吸上げチューブ２２ｄによってポンプハウジング２２ａ内に吸い上げるとともに、ポンプハウジング２２ａ内の液体を押下操作部２２ｃに設けられた吐出口２２ｃ１から吐出させるようになっている。 When the push operation unit 22c is pushed downward, the pump mechanism 22 sucks a certain amount of liquid contained in the container body 10 into the pump housing 22a by the suction tube 22d, and pushes the liquid in the pump housing 22a into the push operation unit. It is designed to be discharged from the discharge port 22c1 provided in the 22c.

ポンプハウジング２２ａは、筒状の部材であり、上部側の外周面に、周方向にわたって外周側に張り出すフランジ部２２ａ１が形成されている。フランジ部２２ａ１は、ポンプハウジング２２ａを開口部１０ａから容器本体１０内に挿入すると、下面が周方向にわたって口部１４の上端部に対向するようになっている。フランジ部２２ａ１と口部１４の上端部との間には、リング状のシール部材２３が配置され、ポンプハウジング２２ａの外周側と口部１４の上端部との間の隙間が閉鎖される。 The pump housing 22a is a tubular member, and a flange portion 22a1 is formed on the outer peripheral surface on the upper side so as to project toward the outer peripheral side in the circumferential direction. When the pump housing 22a is inserted into the container body 10 through the opening 10a, the flange portion 22a1 has a lower surface facing the upper end portion of the mouth portion 14 in the circumferential direction. A ring-shaped sealing member 23 is arranged between the flange portion 22a1 and the upper end portion of the mouth portion 14, and the gap between the outer peripheral side of the pump housing 22a and the upper end portion of the mouth portion 14 is closed.

また、ポンプハウジング２２ａには、開口部１０ａから容器本体１０内に挿入された状態で口部１４の内周側に位置し、口部１４を内周面側から支持するための支持部２２ａ２が形成されている。支持部２２ａ２は、フランジ部２２ａ１の下面の内周側において周方向にわたって下方に延出しており、ポンプハウジング２２ａが開口部１０ａから容器本体１０内に挿入された状態で、口部１４の内周面に周方向にわたって当接し、口部１４を内周面側から支持する。支持部２２ａ２は、フランジ部２２ａ１の下面から例えば３ｍｍ以上下方に延出していることが好ましい。 Further, the pump housing 22a has a support portion 22a2 located on the inner peripheral side of the mouth portion 14 in a state of being inserted into the container main body 10 through the opening 10a, and for supporting the mouth portion 14 from the inner peripheral surface side. It is formed. The support portion 22a2 extends downward in the circumferential direction on the inner peripheral side of the lower surface of the flange portion 22a1, and the inner circumference of the mouth portion 14 is provided with the pump housing 22a inserted into the container body 10 from the opening 10a. It abuts on the surface in the circumferential direction and supports the mouth portion 14 from the inner peripheral surface side. The support portion 22a2 preferably extends downward by, for example, 3 mm or more from the lower surface of the flange portion 22a1.

ここで、キャップ本体２１及びポンプハウジング２２ａは、それぞれ、上述のポリ乳酸樹脂の射出成型によって形成される。また、キャップ本体２１及びポンプハウジング２２ａは、加熱処理を施して結晶化度を高くすることにより耐熱性を向上させ、熱による収縮等の変形を抑制している。キャップ本体２１及びポンプハウジング２２ａは、結晶化度が４０％以上であることが好ましい。また、キャップ本体２１及びポンプハウジング２２ａの耐熱温度が４５℃以上であることが好ましい。 Here, the cap body 21 and the pump housing 22a are each formed by injection molding of the above-mentioned polylactic acid resin. Further, the cap body 21 and the pump housing 22a are heat-treated to increase the crystallinity to improve heat resistance and suppress deformation such as shrinkage due to heat. The cap body 21 and the pump housing 22a preferably have a crystallinity of 40% or more. Further, it is preferable that the heat resistant temperature of the cap body 21 and the pump housing 22a is 45 ° C. or higher.

以上のように構成された合成樹脂容器１は、液体を収容した容器本体１０の口部１４の上端部にシール部材２３を配置するとともに、ポンプ付きキャップ２０のキャップ本体２１を口部１４の外周部に螺合させる。これにより、合成樹脂容器１は、シール部材２３によってポンプハウジング２２ａの外周側と口部１４の内周側との間の隙間が閉鎖され、容器本体１０の開口部１０ａがポンプ付きキャップ２０によって閉鎖される。 In the synthetic resin container 1 configured as described above, the sealing member 23 is arranged at the upper end of the mouth 14 of the container body 10 containing the liquid, and the cap body 21 of the cap 20 with a pump is placed on the outer periphery of the mouth 14. Screw it into the part. As a result, in the synthetic resin container 1, the gap between the outer peripheral side of the pump housing 22a and the inner peripheral side of the mouth portion 14 is closed by the sealing member 23, and the opening 10a of the container body 10 is closed by the cap 20 with a pump. Will be done.

液体を収容した合成樹脂容器１は、例えば４５℃以上の高温の環境下において輸送されたり、高温の環境となり得る浴室に設置されたりすることが考えられる。容器本体１０の口部１４は、高温の環境下において収縮して変形する場合があり、径方向の内側に変形すると、口部１４に螺合しているキャップ本体２１に緩みが生じる可能性がある。 The synthetic resin container 1 containing the liquid may be transported in a high temperature environment of, for example, 45 ° C. or higher, or may be installed in a bathroom that can be in a high temperature environment. The mouth portion 14 of the container body 10 may shrink and deform in a high temperature environment, and if it deforms inward in the radial direction, the cap body 21 screwed to the mouth portion 14 may loosen. be.

しかし、容器本体１０の口部１４は、ポンプ付きキャップ２０のポンプハウジング２２ａに形成された支持部２２ａ２によって周方向にわたって内周面側から支持されるため、収縮による径方向内側への変形が規制され、キャップ本体２１の緩みが抑制されることになる。 However, since the mouth portion 14 of the container body 10 is supported from the inner peripheral surface side in the circumferential direction by the support portion 22a2 formed in the pump housing 22a of the cap 20 with a pump, deformation in the radial direction due to shrinkage is restricted. Therefore, loosening of the cap body 21 is suppressed.

ここで、本実施形態の有する合成樹脂容器１の支持部２２ａ２の有効性に関する試験について説明する。 Here, a test relating to the effectiveness of the support portion 22a2 of the synthetic resin container 1 of the present embodiment will be described.

支持部２２ａ２の有効性に関する試験では、まず、支持部２２ａ２を有する合成樹脂容器１と、支持部２２ａ２を有さない合成樹脂容器と、のそれぞれについて、容器本体に対して同一のトルクでポンプ付きキャップを螺合させることにより、容器本体に対してポンプ付きキャップを取り付ける。次に、ポンプ付きキャップが取り付けられた、支持部２２ａ２を有する合成樹脂容器１と、支持部２２ａ２を有さない合成樹脂容器と、のそれぞれを、４週間にわたって４５℃の温度環境下に設置する。 In the test on the effectiveness of the support portion 22a2, first, the synthetic resin container 1 having the support portion 22a2 and the synthetic resin container not having the support portion 22a2 are each equipped with a pump at the same torque with respect to the container body. Attach the cap with pump to the container body by screwing the cap. Next, each of the synthetic resin container 1 having the support portion 22a2 and the synthetic resin container without the support portion 22a2 to which the cap with the pump is attached is installed in a temperature environment of 45 ° C. for 4 weeks. ..

この試験では、支持部２２ａ２を有さない合成樹脂容器のポンプ付きキャップを取り外すために必要なトルクが、ポンプ付きキャップの取付時に加えたトルクに対して約９０％低下していたのに対して、支持部２２ａ２を有する合成樹脂容器１のポンプ付きキャップ２０を取り外すために必要なトルクが、ポンプ付きキャップの取付時に加えたトルクに対して約３０％低下していることが示された。つまり、支持部２２ａ２を有する合成樹脂容器１は、支持部２２ａ２を有さない合成樹脂容器に対して、ポンプ付きキャップ２０が緩みにくいことが明らかとなった。 In this test, the torque required to remove the pump cap of the synthetic resin container without the support 22a2 was reduced by about 90% with respect to the torque applied when the pump cap was attached. It was shown that the torque required to remove the pump-equipped cap 20 of the synthetic resin container 1 having the support portion 22a2 is reduced by about 30% with respect to the torque applied when the pump-equipped cap is attached. That is, it was clarified that in the synthetic resin container 1 having the support portion 22a2, the cap 20 with the pump is less likely to loosen than the synthetic resin container having no support portion 22a2.

このように、本実施形態の合成樹脂容器１によれば、筒状の口部１４を有するボトル形状の容器本体１０と、口部１４の上端に位置する開口部１０ａを閉鎖するポンプ付きキャップ２０と、を備えた合成樹脂容器１であって、ポンプ付きキャップ２０は、開口部１０ａを閉鎖した状態で口部１４の内周側に位置し、口部１４を内周面側から支持する支持部２２ａ２を有している。 As described above, according to the synthetic resin container 1 of the present embodiment, the bottle-shaped container body 10 having the tubular mouth portion 14 and the cap 20 with a pump for closing the opening 10a located at the upper end of the mouth portion 14 are closed. The synthetic resin container 1 provided with the above means that the cap 20 with a pump is located on the inner peripheral side of the mouth portion 14 with the opening 10a closed, and supports the mouth portion 14 from the inner peripheral surface side. It has a portion 22a2.

また、本実施形態の合成樹脂容器１の製造方法によれば、筒状の口部１４を有するボトル形状の容器本体１０と、口部１４の上端に位置する開口部１０ａを閉鎖するポンプ付きキャップ２０と、を備えた合成樹脂容器１の製造方法であって、射出成型によってプリフォームを形成するプリフォーム形成工程と、プリフォーム形成工程において形成されたプリフォームを、ブロー成型によって容器本体１０とする容器本体形成工程と、開口部１０ａを閉鎖した状態で口部１４の内周側に位置し、口部１４を内周面側から支持する支持部２２ａ２を有するポンプ付きキャップ２０を形成する閉鎖部材形成工程と、を含む。 Further, according to the method for manufacturing the synthetic resin container 1 of the present embodiment, the bottle-shaped container body 10 having the tubular mouth portion 14 and the cap with a pump for closing the opening 10a located at the upper end of the mouth portion 14 are closed. 20 is a method for manufacturing a synthetic resin container 1 comprising the preform forming step of forming a preform by injection molding, and the preform formed in the preform forming step is combined with the container body 10 by blow molding. The process of forming the container body and the closing of the cap 20 with a pump, which is located on the inner peripheral side of the mouth portion 14 with the opening 10a closed and has a support portion 22a2 for supporting the mouth portion 14 from the inner peripheral surface side. Including a member forming step.

これにより、容器本体１０の口部１４が収縮して変形が生じる可能性のある高温の環境下においても、ポンプ付きキャップ２０の支持部２２ａ２によって口部１４が内周面側から支持され、口部１４の収縮による径方向内側への変形が規制され、キャップ本体２１の緩みを抑制することが可能となる。また、口部１４の結晶化度を高くする処理を行うことなく、口部１４の収縮による径方向内側への変形を規制することができるので、容器本体１０の製造工程の低減を図ることが可能となる。 As a result, even in a high temperature environment where the mouth portion 14 of the container body 10 may shrink and deform, the mouth portion 14 is supported from the inner peripheral surface side by the support portion 22a2 of the cap 20 with a pump, and the mouth portion 14 is supported from the inner peripheral surface side. Deformation inward in the radial direction due to contraction of the portion 14 is restricted, and loosening of the cap body 21 can be suppressed. Further, since it is possible to regulate the deformation inward in the radial direction due to the shrinkage of the mouth portion 14 without performing the treatment for increasing the crystallinity of the mouth portion 14, it is possible to reduce the manufacturing process of the container body 10. It will be possible.

また、ポンプ付きキャップ２０は、口部１４の外周側に係合するキャップ本体２１と、キャップ本体２１に係止され、容器本体１０内に収容された液体を吐出させるポンプ機構２２と、を有し、支持部２２ａ２は、ポンプ機構２２を構成するポンプハウジング２２ａに形成されている。 Further, the cap 20 with a pump has a cap body 21 that engages with the outer peripheral side of the mouth portion 14, and a pump mechanism 22 that is locked to the cap body 21 and discharges the liquid contained in the container body 10. However, the support portion 22a2 is formed in the pump housing 22a constituting the pump mechanism 22.

これにより、開口部１０ａから容器本体１０内に挿入されるポンプハウジング２２ａに支持部２２ａ２を形成することで、キャップ本体２１に支持部２２ａ２を形成する必要がなく、キャップ本体２１の構造を簡素化することが可能となる。 As a result, by forming the support portion 22a2 in the pump housing 22a inserted into the container main body 10 from the opening 10a, it is not necessary to form the support portion 22a2 in the cap main body 21, and the structure of the cap main body 21 is simplified. It becomes possible to do.

また、容器本体１０及びポンプ付きキャップ２０は、生分解性樹脂からなる。 Further, the container body 10 and the cap 20 with a pump are made of biodegradable resin.

これにより、微生物によって分解され、最終的に二酸化炭素及び水等を生じることになるため、廃棄物を処理するために必要な負担を軽減することが可能となる。 As a result, it is decomposed by microorganisms and finally carbon dioxide, water and the like are generated, so that it is possible to reduce the burden required for treating the waste.

また、生分解性樹脂は、ポリ乳酸を含むポリ乳酸樹脂である。 The biodegradable resin is a polylactic acid resin containing polylactic acid.

これにより、トウモロコシやサトウキビ等の植物を原料として容器本体１０及びポンプ付きキャップ２０を形成することができるので、大気中の二酸化炭素の増加を抑制することが可能となる。 As a result, the container body 10 and the cap 20 with a pump can be formed from plants such as corn and sugar cane as raw materials, so that it is possible to suppress an increase in carbon dioxide in the atmosphere.

また、ポリ乳酸樹脂は、重量平均分子量が１０万以下のポリ乳酸、数平均分子量４０００以上４００００以下の分岐状ポリ乳酸、グリセリン脂肪酸エステル、アジピン酸エステル、ヒマシ油脂肪酸エステルからなる群より選択される可塑剤を含有し、可塑剤は、１質量パーセント以上５質量パーセント以下の割合で含まれている。 The polylactic acid resin is selected from the group consisting of polylactic acid having a weight average molecular weight of 100,000 or less, branched polylactic acid having a number average molecular weight of 4000 or more and 40,000 or less, glycerin fatty acid ester, adipic acid ester, and castor oil fatty acid ester. It contains a plasticizer, and the plasticizer is contained in a proportion of 1% by mass or more and 5% by mass or less.

これにより、容器本体１０及びポンプ付きキャップ２０の形成加工が容易となり、部材の柔軟性を付加することによって品質の向上を図ることが可能となる。 This facilitates the forming process of the container body 10 and the cap 20 with a pump, and it is possible to improve the quality by adding the flexibility of the members.

また、前記ポリ乳酸樹脂は、重量平均分子量が５万以上３０万以下のポリＬ－乳酸を、１０質量パーセント以上１００質量パーセント以下の割合で含有している。 Further, the polylactic acid resin contains polyL-lactic acid having a weight average molecular weight of 50,000 or more and 300,000 or less in a proportion of 10% by mass or more and 100% by mass or less.

これにより、容器本体１０及びポンプ付きキャップ２０の強度等の品質を保持することが可能となる。 This makes it possible to maintain the quality such as the strength of the container body 10 and the cap 20 with a pump.

また、前記ポンプ付きキャップ２０を形成する前記生分解性樹脂は、結晶化度が４０パーセント以上である。 Further, the biodegradable resin forming the cap 20 with a pump has a crystallinity of 40% or more.

これにより、ポンプ付きキャップ２０の耐熱性を向上させ、支持部２２ａ２の熱による変形を確実に抑制することが可能となり、容器本体１０に対するポンプ付きキャップ２０の緩みをより確実に抑制することが可能となる。 This makes it possible to improve the heat resistance of the cap 20 with a pump, reliably suppress deformation due to heat of the support portion 22a2, and more reliably suppress loosening of the cap 20 with a pump with respect to the container body 10. It becomes.

また、口部１４は、上下方向にわたって同一の結晶化度を有している。 Further, the mouth portion 14 has the same crystallinity in the vertical direction.

これにより、容器本体１０の製造工程が複雑化することを防止することが可能となるので、合成樹脂容器１の生コストの低減を図ることが可能となる。 This makes it possible to prevent the manufacturing process of the container body 10 from becoming complicated, and thus it is possible to reduce the raw cost of the synthetic resin container 1.

＜第２実施形態＞
図３は、本発明の第２実施形態を示すものであり、合成樹脂容器の要部側面断面図である。尚、前記実施形態と同様の構成部分には、同一の符号を付して示す。 <Second Embodiment>
FIG. 3 shows a second embodiment of the present invention, and is a side sectional view of a main part of a synthetic resin container. The same components as those in the above embodiment are designated by the same reference numerals.

本実施形態の合成樹脂容器１は、容器本体１０の開口部１０ａを閉鎖する閉鎖部材がポンプ機構２２を有しないキャップ３０である。 The synthetic resin container 1 of the present embodiment is a cap 30 in which the closing member for closing the opening 10a of the container body 10 does not have the pump mechanism 22.

キャップ３０は、開口部１０ａを閉鎖する閉鎖部３１と、閉鎖部３１の外周側に設けられた外周部３２と、外周部３２の径方向内側に設けられた支持部３３と、を有している。 The cap 30 has a closed portion 31 that closes the opening 10a, an outer peripheral portion 32 provided on the outer peripheral side of the closed portion 31, and a support portion 33 provided on the radial inner side of the outer peripheral portion 32. There is.

閉鎖部３１は、シール部材２３を介在させて容器本体１０の口部１４の上端に配置することにより開口部１０ａを閉鎖する。 The closing portion 31 closes the opening portion 10a by arranging the closing portion 31 at the upper end of the mouth portion 14 of the container body 10 with the sealing member 23 interposed therebetween.

外周部３２は、内周面に口部１４のネジ山１４ａに螺合する雌ネジ３２ａが形成されている。 The outer peripheral portion 32 is formed with a female screw 32a screwed to the thread 14a of the mouth portion 14 on the inner peripheral surface.

支持部３３は、閉鎖部３１の下面の径方向の中央部側において下方に突出するように形成されている。支持部３３は、閉鎖部３１が開口部１０ａを閉鎖した状態で、口部１４の内周側に位置し、口部１４の内周面に周方向にわたって当接することにより、口部１４を内周面側から支持する。 The support portion 33 is formed so as to project downward on the radial center portion side of the lower surface of the closed portion 31. The support portion 33 is located on the inner peripheral side of the mouth portion 14 in a state where the closed portion 31 closes the opening portion 10a, and abuts the inner peripheral surface of the mouth portion 14 in the circumferential direction to bring the mouth portion 14 inside. Support from the peripheral side.

このように、本実施形態の合成樹脂容器１によれば、前記第１実施形態と同様に、容器本体１０の口部１４が収縮して変形が生じる可能性のある高温の環境下においても、キャップ３０の支持部３３によって口部１４が内周面側から支持され、口部１４の収縮による径方向内側への変形が規制され、キャップ３０の緩みを抑制することが可能となる。 As described above, according to the synthetic resin container 1 of the present embodiment, as in the first embodiment, even in a high temperature environment where the mouth portion 14 of the container body 10 may shrink and deform. The mouth portion 14 is supported from the inner peripheral surface side by the support portion 33 of the cap 30, the deformation of the mouth portion 14 inward in the radial direction due to the contraction is restricted, and the loosening of the cap 30 can be suppressed.

また、キャップ３０は、開口部１０ａを閉鎖する閉鎖部３１と、閉鎖部３１の外周側に設けられ、口部１４の外周側に係合する外周部３２を有し、支持部３３は、閉鎖部３１の下面側における外周部３２の径方向内側に設けられている。 Further, the cap 30 has a closing portion 31 that closes the opening 10a, and an outer peripheral portion 32 that is provided on the outer peripheral side of the closing portion 31 and engages with the outer peripheral side of the mouth portion 14, and the support portion 33 is closed. It is provided on the inner side in the radial direction of the outer peripheral portion 32 on the lower surface side of the portion 31.

これにより、閉鎖部３１、外周部３２及び支持部３３を含むキャップ３０を一部品として形成することが可能となり、組付け工数の低減を図ることが可能となる。 As a result, the cap 30 including the closed portion 31, the outer peripheral portion 32, and the support portion 33 can be formed as one component, and the assembly man-hours can be reduced.

＜第３実施形態＞
図４は、本発明の第３実施形態を示すものであり、合成樹脂容器の要部側面断面図である。尚、前記第１及び第２実施形態と同様の構成部分には、同一の符号を付して示す。 <Third Embodiment>
FIG. 4 shows a third embodiment of the present invention, and is a side sectional view of a main part of a synthetic resin container. The same components as those of the first and second embodiments are designated by the same reference numerals.

本実施形態の合成樹脂容器１は、容器本体１０の開口部１０ａを閉鎖する閉鎖部材が、閉鎖部３１、外周部３２及び支持部３３を有するキャップ３０のであり、閉鎖部３１の径方向の中央部側にポンプ機構を取り付けるためのポンプ用開口部３１ａが形成されている。 In the synthetic resin container 1 of the present embodiment, the closing member for closing the opening 10a of the container body 10 is a cap 30 having a closing portion 31, an outer peripheral portion 32, and a supporting portion 33, and is the radial center of the closing portion 31. A pump opening 31a for attaching the pump mechanism is formed on the portion side.

ポンプ用開口部３１ａには、容器本体１０内に収容された液体を吐出するためのポンプ機構が取り付けられるようになっている。 A pump mechanism for discharging the liquid contained in the container body 10 is attached to the pump opening 31a.

本実施形態の合成樹脂容器１は、第１実施形態のように、支持部２２ａ２がポンプ機構２２側に設けられておらず、支持部３３がキャップ３０側に設けられている。 In the synthetic resin container 1 of the present embodiment, unlike the first embodiment, the support portion 22a2 is not provided on the pump mechanism 22 side, and the support portion 33 is provided on the cap 30 side.

このように、本実施形態の合成樹脂容器１によれば、第１及び第２実施形態と同様に、容器本体１０の口部１４が収縮して変形が生じる可能性のある高温の環境下においても、キャップ３０の支持部３３によって口部１４が内周面側から支持され、口部１４の収縮による径方向内側への変形が規制され、キャップ３０の緩みを抑制することが可能となる。 As described above, according to the synthetic resin container 1 of the present embodiment, as in the first and second embodiments, in a high temperature environment where the mouth portion 14 of the container body 10 may shrink and deform. Further, the mouth portion 14 is supported from the inner peripheral surface side by the support portion 33 of the cap 30, the deformation of the mouth portion 14 inward in the radial direction due to the contraction is restricted, and the loosening of the cap 30 can be suppressed.

尚、前記第１乃至第３実施形態では、容器本体に収容される液体としてシャンプー、リンス、ボディソープ等の所謂トイレタリー用品を示したが、これに限られるものではない。閉鎖部材に支持部を有するものであれば、収容される液体として飲料を収容する合成樹脂容器に対しても適用することが可能である。 In the first to third embodiments, so-called toiletry products such as shampoo, conditioner, and body soap are shown as the liquid contained in the container body, but the present invention is not limited thereto. As long as the closing member has a support portion, it can be applied to a synthetic resin container that stores a beverage as a liquid to be stored.

また、前記第１乃至第３実施形態では、支持部２２ａ２，３３を、容器本体１０の口部１４の内周面の周方向にわたって当接するようにしたものを示したが、これに限られるものではない。口部１４の収縮による径方向内側への変形が規制することができれば、支持部を、周方向に間隔をおいて配置した複数の支持片から形成してもよい。 Further, in the first to third embodiments, the support portions 22a2 and 33 are shown to be in contact with each other over the circumferential direction of the inner peripheral surface of the mouth portion 14 of the container body 10, but the present invention is limited to this. is not. If the deformation inward in the radial direction due to the contraction of the mouth portion 14 can be regulated, the support portion may be formed from a plurality of support pieces arranged at intervals in the circumferential direction.

１ 合成樹脂容器
１０ 容器本体
１０ａ 開口部
１４ 口部
２０ ポンプ付きキャップ
２１ キャップ本体
２２ ポンプ機構
２２ａ ポンプハウジング
２２ａ２ 支持部
３０ キャップ
３３ 支持部 1 Synthetic resin container 10 Container body 10a Opening 14 Port 20 Cap with pump 21 Cap body 22 Pump mechanism 22a Pump housing 22a2 Support part 30 Cap 33 Support part

Claims (13)

筒状の口部を有するボトル形状の容器本体と、前記口部の上端に位置する開口部を閉鎖する閉鎖部材と、を備えた合成樹脂容器であって、
前記閉鎖部材は、前記開口部を閉鎖した状態で前記口部の内周側に位置し、前記口部を内周面側から支持する支持部を有している
合成樹脂容器。 A synthetic resin container comprising a bottle-shaped container body having a tubular mouth portion and a closing member for closing an opening located at the upper end of the mouth portion.
The closing member is a synthetic resin container that is located on the inner peripheral side of the mouth portion with the opening closed and has a support portion that supports the mouth portion from the inner peripheral surface side. 前記閉鎖部材は、前記口部の外周側に係合する係合体と、前記係合体に係止され、前記容器本体内に収容された液体を吐出させるポンプ機構と、を有し、
前記支持部は、前記ポンプ機構を構成するポンプハウジングに形成されている
請求項１に記載の合成樹脂容器。 The closing member has an engaging body that engages with the outer peripheral side of the mouth portion, and a pump mechanism that is locked to the engaging body and discharges a liquid contained in the container body.
The synthetic resin container according to claim 1, wherein the support portion is formed in a pump housing constituting the pump mechanism. 前記閉鎖部材は、前記開口部を閉鎖する閉鎖部と、前記閉鎖部の外周側に設けられ、前記口部の外周側に係合する外周部を有し、
前記支持部は、前記閉鎖部の下面側における前記外周部の径方向内側に設けられている
請求項１に記載の合成樹脂容器。 The closing member has a closing portion that closes the opening portion, and an outer peripheral portion that is provided on the outer peripheral side of the closing portion and engages with the outer peripheral side of the mouth portion.
The synthetic resin container according to claim 1, wherein the support portion is provided on the lower surface side of the closed portion on the radial inside of the outer peripheral portion. 前記容器本体及び前記閉鎖部材は、生分解性樹脂からなる
請求項１乃至３のいずれか１項に記載の合成樹脂容器。 The synthetic resin container according to any one of claims 1 to 3, wherein the container body and the closing member are made of a biodegradable resin. 前記生分解性樹脂は、ポリ乳酸を含むポリ乳酸樹脂である
請求項４に記載の合成樹脂容器。 The synthetic resin container according to claim 4, wherein the biodegradable resin is a polylactic acid resin containing polylactic acid. 前記ポリ乳酸樹脂は、重量平均分子量が１０万以下のポリ乳酸、数平均分子量４０００以上４００００以下の分岐状ポリ乳酸、グリセリン脂肪酸エステル、アジピン酸エステル、ヒマシ油脂肪酸エステルからなる群より選択される可塑剤を含有し、
前記可塑剤は、１質量パーセント以上５質量パーセント以下の割合で含まれている
請求項５に記載の合成樹脂容器。 The polylactic acid resin is a plastic selected from the group consisting of polylactic acid having a weight average molecular weight of 100,000 or less, branched polylactic acid having a number average molecular weight of 4000 or more and 40,000 or less, glycerin fatty acid ester, adipate ester, and castor oil fatty acid ester. Contains the agent,
The synthetic resin container according to claim 5, wherein the plasticizer is contained in a proportion of 1% by mass or more and 5% by mass or less. 前記ポリ乳酸樹脂は、重量平均分子量が５万以上３０万以下のポリＬ－乳酸を、１０質量パーセント以上１００質量パーセント以下の割合で含有している
請求項５または６に記載の合成樹脂容器。 The synthetic resin container according to claim 5 or 6, wherein the polylactic acid resin contains polyL-lactic acid having a weight average molecular weight of 50,000 or more and 300,000 or less in a proportion of 10% by mass or more and 100% by mass or less. 前記閉鎖部材を形成する前記生分解性樹脂は、結晶化度が４０パーセント以上である
請求項４乃至７のいずれか１項に記載の合成樹脂容器。 The synthetic resin container according to any one of claims 4 to 7, wherein the biodegradable resin forming the closing member has a crystallinity of 40% or more. 前記口部は、上下方向にわたって同一の結晶化度を有している
請求項１乃至８のいずれか１項に記載の合成樹脂容器。 The synthetic resin container according to any one of claims 1 to 8, wherein the mouth portion has the same crystallinity in the vertical direction. 前記口部は耐熱温度が４５℃未満の樹脂からなり、前記閉鎖部材は耐熱温度が４５℃以上の樹脂からなる
請求項１乃至９のいずれか１項に記載の合成樹脂容器。 The synthetic resin container according to any one of claims 1 to 9, wherein the mouth portion is made of a resin having a heat resistant temperature of less than 45 ° C., and the closing member is made of a resin having a heat resistant temperature of 45 ° C. or higher. 前記口部は結晶化度が４０パーセント未満の樹脂からなり、前記閉鎖部材は結晶化度が４０％以上の樹脂からなる
請求項１乃至１０のいずれか１項に記載の合成樹脂容器。 The synthetic resin container according to any one of claims 1 to 10, wherein the mouth portion is made of a resin having a crystallinity of less than 40%, and the closing member is made of a resin having a crystallinity of 40% or more. 筒状の口部を有するボトル形状の容器本体と、前記口部の上端に位置する開口部を閉鎖する閉鎖部材と、を備えた合成樹脂容器の製造方法であって、
射出成型によってプリフォームを形成するプリフォーム形成工程と、
プリフォーム形成工程において形成された前記プリフォームを、ブロー成型によって前記容器本体とする容器本体形成工程と、
前記開口部を閉鎖した状態で前記口部の内周側に位置し、前記口部を内周面側から支持する支持部を有する閉鎖部材を形成する閉鎖部材形成工程と、を含む
合成樹脂容器の製造方法。 A method for manufacturing a synthetic resin container comprising a bottle-shaped container body having a tubular mouth portion and a closing member for closing an opening located at the upper end of the mouth portion.
Preform forming process to form preform by injection molding,
A container body forming step in which the preform formed in the preform forming step is used as the container body by blow molding, and a container body forming step.
A synthetic resin container including a closing member forming step of forming a closing member having a support portion that is located on the inner peripheral side of the mouth portion with the opening closed and supports the mouth portion from the inner peripheral surface side. Manufacturing method. 前記プリフォームにおいて前記口部が形成されており、前記容器本体形成工程において、前記口部が金型によって加熱されない
請求項１２に記載の合成樹脂容器の製造方法。 The method for manufacturing a synthetic resin container according to claim 12, wherein the mouth portion is formed in the preform, and the mouth portion is not heated by a mold in the container body forming step.
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Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05229577A (en) * 1992-02-14 1993-09-07 Toyo Aerosol Kogyo Kk Dispenser pump
JP4947935B2 (en) * 2004-08-11 2012-06-06 東洋製罐株式会社 Biodegradable cap with excellent openability and container with biodegradable cap
JP2007083599A (en) * 2005-09-22 2007-04-05 Unitika Ltd Biodegradable container and method for molding the same
JP5683852B2 (en) * 2010-07-02 2015-03-11 ザ コカ・コーラ カンパニーＴｈｅ Ｃｏｃａ‐Ｃｏｌａ Ｃｏｍｐａｎｙ Plastic bottles and preforms
JP5711976B2 (en) * 2011-01-07 2015-05-07 三笠産業株式会社 Synthetic resin caps and containers with caps
JP6103580B2 (en) * 2012-12-20 2017-03-29 花王株式会社 Discharge container
US20160023812A1 (en) * 2014-07-24 2016-01-28 Christopher Raymond Kikel Reusable Sealing Bottle Cap Assembly
JP2016190950A (en) * 2015-03-31 2016-11-10 富士ゼロックス株式会社 Resin composition and resin molded article

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