WO2007082461A1 - Récipient d'infusion obtenue par moulage-soufflage, copolymère éthylène-propylène et mélange utilisé pour la fabrication d'un tel récipient et procédé de fabrication correspondant - Google Patents

Récipient d'infusion obtenue par moulage-soufflage, copolymère éthylène-propylène et mélange utilisé pour la fabrication d'un tel récipient et procédé de fabrication correspondant Download PDF

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Publication number
WO2007082461A1
WO2007082461A1 PCT/CN2007/000094 CN2007000094W WO2007082461A1 WO 2007082461 A1 WO2007082461 A1 WO 2007082461A1 CN 2007000094 W CN2007000094 W CN 2007000094W WO 2007082461 A1 WO2007082461 A1 WO 2007082461A1
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WO
WIPO (PCT)
Prior art keywords
infusion container
container according
infusion
preform
mouth
Prior art date
Application number
PCT/CN2007/000094
Other languages
English (en)
French (fr)
Inventor
Andrew W.W. Lee
Original Assignee
Dong Guan Founder Machinery 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 Dong Guan Founder Machinery Ltd. filed Critical Dong Guan Founder Machinery Ltd.
Publication of WO2007082461A1 publication Critical patent/WO2007082461A1/zh

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C49/00Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
    • B29C49/0005Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor characterised by the material
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61JCONTAINERS SPECIALLY ADAPTED FOR MEDICAL OR PHARMACEUTICAL PURPOSES; DEVICES OR METHODS SPECIALLY ADAPTED FOR BRINGING PHARMACEUTICAL PRODUCTS INTO PARTICULAR PHYSICAL OR ADMINISTERING FORMS; DEVICES FOR ADMINISTERING FOOD OR MEDICINES ORALLY; BABY COMFORTERS; DEVICES FOR RECEIVING SPITTLE
    • A61J1/00Containers specially adapted for medical or pharmaceutical purposes
    • A61J1/05Containers specially adapted for medical or pharmaceutical purposes for collecting, storing or administering blood, plasma or medical fluids ; Infusion or perfusion containers
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/14Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08LCOMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L23/00Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
    • C08L23/02Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
    • C08L23/16Elastomeric ethene-propene or ethene-propene-diene copolymers, e.g. EPR and EPDM rubbers
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29LINDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00Other particular articles
    • B29L2031/712Containers; Packaging elements or accessories, Packages
    • B29L2031/7148Blood bags, medical bags

Definitions

  • Blow-molded infusion container ethylene propylene copolymer for producing the container, blend for producing the container, and method for producing the same
  • the present invention relates to a blow molded infusion container, an ethylene propylene copolymer for producing the container, a blend for producing the container, and a method of producing the container. Background technique
  • plastic bottles are shortcomings such as fragile, heavy weight, inconvenient transportation and unfavorable recycling.
  • the cost of plastic soft bags is too high, while plastic bottles are light in weight, easy to form, low in cost, good in transparency, easy to transport and store.
  • the existing plastic bottle manufacturing method adopts one-step method and two-step method. Among them, the plastic bottle of the two-step manufacturing process has higher transparency, easier container forming, higher output, lighter weight, lower cost and stronger strength. High, gas barrier improvement and other advantages have more advantages.
  • the transition arc of the bottle body and the bottom of the bottle is small, not obvious or close to the corner, and the bottom of the bottle has no groove or a deep groove with one side.
  • waste bottles and defective products such as uneven waves or dents are likely to appear at the bottom of the bottle.
  • the bottom corner of the bottle is easily scratched, stress concentration, and easy to break. , cracking, leaking, causing losses.
  • infusion bottles with grooves on the market are not easily straightforward.
  • the machine operator's skill requirements are very high, and the machine must run at a lower speed. Under the realistic requirements of high speed, high yield, high efficiency and low cost of infusion containers, it is not in line with market needs. Summary of the invention
  • thermoplastic insufflation infusion container that can be straight-lined, simple to manufacture, and lighter in weight.
  • Another object of the present invention is to provide a polypropylene for use in the manufacture of a highly transparent, low cost, straight infusion container.
  • Another object of the present invention is to provide a polypropylene blend for use in the manufacture of highly transparent, low cost, straight infusion containers.
  • Another object of the present invention is to provide a method of making a highly transparent, low cost, straight infusion container.
  • the infusion container of the present invention comprises an integrally formed mouth portion, a shoulder portion, a body portion and a bottom portion, wherein the body portion has a thickness thinner than the mouth portion, the shoulder portion and the bottom portion, thereby The infusion container is easily deformed inwardly and contracted.
  • the body thickness is between 0.1 mm and 0.8.
  • the height of the arc transition is between 10 mm and 30 mm.
  • the inner diameter of the mouth portion does not exceed 25 mm.
  • the inner diameter of the mouth portion does not exceed 18 mm.
  • the bottom portion has a recessed recess.
  • the recess is laterally disposed at the bottom.
  • the recess has a width of about one quarter to one half of the length of the bottom.
  • the recess and the bottom portion have a circular arc transition section.
  • the recess has a depth of between 1.5 mm and 8 mm.
  • the concave portion includes a first concave portion, a second concave portion and a third concave portion, wherein the second concave portion is located at a center of the bottom portion, and the first concave portion and the third concave portion are symmetrically disposed at the second portion Both sides of the recess.
  • a lifting eye is movably secured to the bottom center position.
  • the infusion container has an elliptical cross section.
  • the infusion container is injection molded with an ethylene propylene copolymer
  • the embryo is blow molded.
  • the preform has a thickness of between 2.5 mm and 4 mm.
  • the embryo shape matches the shape of the infusion container.
  • the lengthwise draw ratio of the blank is between 1.9 and 2.5, that is, in the case where the mouth is removed, the ratio of the height of the embryo to the height of the infusion container is 1:1.9 at 1:2.5. between.
  • the thermoplastic material blow molded infusion container of the present invention comprises an integrally formed mouth portion, a shoulder portion, a body portion and a bottom portion, wherein the body portion has a uniform thickness and The thickness of the shoulder portion and the bottom portion are substantially uniform and thinner than the mouth portion, so that the infusion container is easily deformed inwardly.
  • the thickness of the body is preferably between 0.2 mm and 0.4 mm.
  • the mouth, the shoulder, the body and the bottom are smoothly transitioned in a circular arc.
  • the infusion container has a flat shape.
  • the infusion container has a cross section approximately elliptical.
  • the inner diameter of the mouth portion does not exceed 25 mm.
  • the inner diameter of the mouth portion does not exceed 18 mm.
  • a lifting eye is movably secured to the bottom center position.
  • the infusion container is blow molded from an injection molded article of an ethylene propylene copolymer.
  • the preform has a thickness of between 2.5 mm and 4 mm.
  • the embryo shape matches the shape of the infusion container.
  • the ratio of the height of the preform to the height of the infusion container is between 1.9 and 2.5, that is, in the case where the mouth is removed.
  • 1 : 1.9 is between 1:2.5.
  • a random ethylene propylene copolymer for producing an infusion container according to the present invention wherein the ethylene content is between 0.5% and 5.0%. Preferably, the ethylene content is between 2.5% and 4.0%.
  • a blend for making an infusion container according to the present invention comprising: (a) a random ethylene propylene copolymer as previously described; (b) a thermoplastic elastomer; wherein the thermoplastic elastomer is present in an amount between 0.5% and 40% . Preferably, the thermoplastic elastomer is present in an amount between 1% and 15%.
  • a method of manufacturing an infusion container according to the present invention comprising:
  • thermoplastic elastomer (a) The ethylene propylene copolymer pellets containing ethylene units or the blend pellets blended with the thermoplastic elastomer are placed in an injection molding apparatus for heating, plasticized and injected into one or more cavities of a certain shape. In the middle (ie, injection molding), after the pressure is cooled, the preform of the required shape of the injection mold is formed;
  • the blank After cooling for a period of time, the blank is sent to the blow molding equipment for heating, softened and sent to one or more cavities (ie, blow molds) of a certain shape, and the preform is stretched by the drawbar to the infusion container.
  • the compressed air of a certain pressure is introduced into the embryo tube, which is inflated and adhered to the wall of the cavity for cooling. After the pressure is fixed and shaped, it is taken out and formed into an infusion container.
  • the preform having a certain correlation with the shape of the infusion container is injection molded by the injection molding apparatus.
  • the temperature of the mouth of the preform is kept lower than the temperature of the body of the preform.
  • FIG. 1 is a front view of an infusion container according to a first embodiment of the present invention
  • FIG. 2 is a side view of the infusion container of the first embodiment of the present invention
  • Figure 4 is a bottom plan view of the infusion container of the first embodiment of the present invention
  • Figure 5 is a view showing the contraction effect of the infusion container of the first embodiment of the present invention after straight discharge
  • Figure 6 is an infusion container of the second embodiment of the present invention.
  • Figure 7 is a side elevational view of the infusion container of the second embodiment of the present invention;
  • Figure 8 is a cross-sectional view of the infusion container of the second embodiment of the present invention;
  • Fig. 9 is a schematic view showing a bottom surface of an infusion container according to a second embodiment of the present invention;
  • Fig. 10 is a schematic view showing a manufacturing mold of the infusion container according to the first embodiment of the present invention.
  • Figure 11 is a schematic view showing a manufacturing mold of an infusion container according to a second embodiment of the present invention.
  • Figure 12 is a contraction effect diagram of the infusion container of the second embodiment of the present invention after straight discharge;
  • Figure 13 is a graph showing the relationship between time and flow rate of the infusion container of the second embodiment of the present invention.
  • Fig. 14 is a graph showing the relationship between the amount of residual liquid and the flow rate of the infusion container according to the second embodiment of the present invention. detailed description
  • the infusion container of the present invention comprises a mouth portion 1, a shoulder portion 2, a body portion 3 and a bottom portion 4, and the thickness of the body portion 3 is thinner than the mouth portion. 1. Shoulder 2 and bottom 4.
  • the body 3 has a thickness of between 0.1 mm and 0.8 mm.
  • the inner diameter of the mouth portion 1 does not exceed 25 mm, and the preferred inner diameter does not exceed 18 mm, which improves the yield of the container and the speed of blow molding.
  • the arc transition 5 between the body 3 and the bottom 4 will effectively prevent stress concentration and more effectively prevent the container from being scratched, broken, leaked, and the like.
  • the bottom portion 4 has an indented recess 41, and the recess 41 is laterally disposed at the bottom 4.
  • a recess 41 is provided in the bottom portion 4.
  • the width of the recess 41 is between about one quarter and one half of the length of the bottom 4, preferably one third of the length of the bottom 4.
  • Figure 5 As shown, the lifting eye 6 is movably fixed in the second recess 41b by welding.
  • the recess 41 includes a first recess 41a, a second recess 41b, and a third recess 41c.
  • the second recess 41b is located at the center of the bottom portion 4.
  • the first recess 41a and the third recess 41c are symmetrically disposed on both sides of the second recess 41b.
  • the recess prevents irregular dents and wave inequalities at the bottom.
  • the arcuate transition of the recess facilitates shaping and prevents stress concentration.
  • the first and third recesses are symmetrically distributed on the bottom portion, so that the bottom portion avoids unevenness.
  • the infusion container has an elliptical cross section, which facilitates blow molding and self-discharge of the liquid in the container.
  • Fig. 5 is a view showing the contraction effect of the infusion container of the present invention after straight discharge.
  • the infusion liquid is first injected, and then the stopper 20 is stuffed into the mouth portion 1 of the container 10 to be airtight.
  • the container 10 is inverted and the hollow needle 30 is inserted into the stopper 20, and the liquid of the container 10 can be discharged from the hollow needle 30.
  • the thickness of the body portion 3 is thinner than the mouth portion 1, the shoulder portion 2, and the bottom portion 4, when the liquid of the infusion container 10 is discharged, the body portion 3 is contracted and deformed inward.
  • the thickness of the body 3 is controlled to be between 0.1 mm and 0.8 mm.
  • the infusion container of the present invention has a high liquid self-discharging ability.
  • the infusion container according to the present invention is blow molded from an injection molded preform of an ethylene propylene copolymer.
  • the thickness of the embryo is between 2.5mm and 4mm, and the shape matches the shape of the infusion container.
  • the lengthwise stretch ratio of the blank is between 1.9 and 2.5, that is, in the case where the mouth is removed, the ratio of the height of the embryo to the height of the infusion container is between 1:1.9 and 1:2.5. Thereby, the yield of the product can be improved.
  • the infusion container of the present invention is greatly improved in transparency, strength and gas barrier property, and can be an excellent substitute for a glass infusion container, and an environmentally friendly product having more advantages.
  • the infusion container of the present invention comprises a mouth portion 1, a shoulder portion 2, a body portion 3 and a bottom portion 4, and the body portion 3 has a thickness thinner than the mouth portion 1, and the shoulder portion 2
  • the bottom 4 is substantially uniform, and the thickness of the body 3 is preferably between 0.2 mm and 0.4 mm.
  • the thickness of the body of the commonly used infusion container is between 0.1 mm and 0.8 mm, and the bottle body cannot be made too thin to avoid cracking easily in the thin portion.
  • the inner diameter of the mouth portion 1 is not more than 25 mm, and preferably, the inner diameter is 18 mm, which improves the yield of the container and the speed of blow molding.
  • Both the body 3 and the bottom 4 are arc-shaped, and the arcs are smoothly connected to make the infusion container closer to the shape of the flat soft bag.
  • the arc of the body 3 and the bottom portion 4 effectively prevents stress concentration, and more effectively prevents the container from being scratched, broken, leaked, and the like.
  • the infusion container of the present invention determines that the body portion 3 is more uniform due to the structure of the bottle body, so that the overall thickness can be made thinner, so that the weight is lighter, the raw materials are saved, and the manufacturing cost is lower.
  • the bottom portion 4 of the infusion container of the present invention has no recessed portion, so that the deformable range of the bottom of the bottle is greatly increased, making the infusion container more deformable and more evenly drained.
  • the eyebolt 5 is movably fixed to the center of the bottom portion 4 by welding.
  • the infusion container has an elliptical cross section, which facilitates blow molding and self-discharge of the liquid in the container.
  • Fig. 10 is a schematic view showing a manufacturing mold of an infusion container having an indented recess at the bottom.
  • the mold 6 for manufacturing the infusion container includes a first mold 61, a second mold 62, and a third mold 63. Since the infusion bottle bottom 4 has a recessed recess 41, a special bottom mold third mold 63 is required to manufacture the mold.
  • Figure 11 is a schematic view showing the manufacturing mold of the infusion container having no recessed portion of the present invention. As shown in the figure, since the bottom portion 4 of the infusion container has no recessed portion, the mold does not need to have a special bottom mold, and is composed only of the first mold 61 and the second mold 62, so that the structure of the mold 6 is simpler and improved.
  • FIG. 12 is a view showing the contraction effect of the infusion container of the present invention after straight discharge.
  • the infusion container 10 of the present invention is first filled with the infusion liquid, and then the stopper 20 is stuffed into the mouth portion 1 of the container 10 to be airtight.
  • the hollow needle 30 is inserted into the stopper 20 after the container 10 is inverted, and the liquid of the container 10 can be discharged from the hollow needle 30.
  • the infusion container of the present invention Since the thickness of the body 3 is thinner than the mouth portion 1 and substantially coincides with the shoulder portion 2 and the bottom portion 4, and the thickness of the body portion 3 is controlled between 0.2 mm and 0.4 mm, when the liquid of the infusion container 10 is discharged, the body portion 3 will shrink and deform inward. As the liquid is reduced, the body 3 will bend from the middle and approach each other until the liquid is completely discharged. Since the thickness of the body 3 is relatively thin and substantially the same as the thickness of the shoulder 2 and the bottom 4, it is more advantageous for the liquid in the container to be evenly arranged in a straight line. Therefore, the infusion container of the present invention has a high liquid straight-discharge capacity.
  • the infusion container according to the present invention is blow molded from an injection molded preform of an ethylene propylene copolymer.
  • the thickness of the embryo is between 2.5mm and 4mm, and the shape matches the shape of the infusion container.
  • the lengthwise stretch ratio of the blank is between 1.9 and 2.5, that is, in the case where the mouth is removed, the ratio of the height of the embryo to the height of the infusion container is between 1:1.9 and 1:2.5. Thereby, the yield of the product can be improved.
  • the infusion curve is close to a straight line with the same proportional coefficient, that is, the flow rate of the infusion is substantially the same during the same period of time, and the curve showing the relationship between the amount of residual liquid and the flow rate is shown.
  • the infusion flow rate curve is substantially smooth and the trend is consistent, that is, the drainage is uniform.
  • the infusion container of the invention can be arranged in a straight line at a constant speed, is simple in manufacturing, light in weight, low in cost, greatly improved in transparency, strength and gas barrier property, and can be an excellent substitute for a glass infusion container, and has more advantages.
  • Environmentally friendly products Example of a random ethylene propylene copolymer for producing an infusion container
  • propylene (propylene) is embedded in a polymer backbone (Polymer Back-bone) in a polymerization chemical reaction.
  • Copolymer PP Copolymer PP
  • Block Copolymer Block Copolymer
  • Random Copolymerization means that the arrangement of ethylene in the main chain is random.
  • the addition of ethylene monomer to random copolymer polypropylene improves the clarity, cold resistance, toughness and processing conditions compared to polypropylene.
  • the amount of ethylene monomer added is generally controlled to be 0.5 to 5.0%, and in a more preferred embodiment, the amount of ethylene monomer added is between 2.5% and 4.0%.
  • An example of a blend for making an infusion container can be added to the ethylene content up to 4-5% when polymerized to form a random ethylene propylene copolymer. After the addition amount is increased, the process is prone to many problems. If the toughness and softness of the random ethylene propylene copolymer are to be improved, the thermoplastic elastomer is post-processed to achieve the desired purpose.
  • the thermoplastic elastomer in the ethylene propylene copolymer containing 0.5 to 5.0% of ethylene, may be generally added in an amount of from 0.5% to 40%, as required for the use, and the thermoplastic elastomer and The degree of compatibility of the polypropylene plastic is considered in consideration of the amount of addition. In view of compatibility and economy, it is preferred that the amount of addition is preferably from 1% to 15%.
  • the addition of a thermoplastic elastomer to an ethylene propylene copolymer is generally by mechanical blending, plasticizing and granulating. The purpose of adding an elastomer is to improve the softness, cold resistance and toughness of the ethylene propylene copolymer.
  • the thermoplastic elastomer may be selected from polyolefin thermoplastic elastomers (TPO, TPV, etc.), styrenic thermoplastic elastomers (SBC, SBS, SIS, SEBS, SEPS, etc.), and polyurethane thermoplastic elastomers (TPU), depending on the application. Wait.
  • TPO polyolefin thermoplastic elastomers
  • SBC styrenic thermoplastic elastomers
  • SBS SIS
  • SEBS SEBS
  • SEPS polyurethane thermoplastic elastomers
  • the ethylene propylene copolymer of the present invention and the above blend are used to produce an infusion container by the following methods: (a) Blending of ethylene propylene copolymer pellets containing ethylene units or blending with thermoplastic elastomers The pellets are heated in an injection molding apparatus, and are plasticized and injected into one or more cavities of a certain shape (ie, an injection mold).
  • the preform of the shape required for the injection mold is formed; (b) the blank after cooling for a period of time is sent to the blow molding apparatus for heating, softened and sent to one or more cavities of a certain shape (ie, a blow mold) In the middle, the preform is stretched by the tie rod to the height required by the infusion container, and then a certain pressure of compressed air is introduced into the embryo tube, inflated and adhered to the wall of the cavity to be cooled, taken out after pressure setting, and formed into an infusion solution. container.
  • a preform having a certain correlation with the shape of the infusion container is injection molded by the injection molding apparatus to increase the success rate.
  • the blow molding apparatus heats the blank, the temperature of the mouth of the preform is kept lower than the temperature of the body portion of the preform, and the success rate can be further improved.
  • the present invention is not limited to the contents disclosed in the above description, and those skilled in the art can fully implement the same technical effects and technical purposes by using the same or equivalent technical solutions, and the modifications still belong to the protection of the present invention. range.

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  • Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
  • Containers Having Bodies Formed In One Piece (AREA)

Description

吹塑成形的输液容器、 制造该容器的乙烯丙烯共聚物、 制造该容器 的共混物及该容器的制造方法 技术领域
本发明涉及吹塑成形的输液容器、 制造该容器的乙烯丙烯共聚 物、 制造该容器的共混物及该容器的制造方法。 背景技术
目前国内、 国际常用的输液容器包括玻璃瓶、 塑胶瓶、 塑胶软 袋等多种类型。 其中, 玻璃瓶存在易碎、 重量重、 运输不方便和不 利回收等缺点, 塑胶软袋的成本则太高, 而塑胶瓶则具有重量轻、 成型容易、 成本低、 透明度好、 便于运输、 储存和使用等诸多方面 优点, 使用占有率越来越高。 现有塑胶瓶制造方法有采用一步法和 二步法, 其中, 二步法制造工艺的塑胶瓶以其透明度更高, 容器成 型更容易, 产量更高, 重量更轻, 成本更低, 强度更高, 气体阻隔 性改善等优点而更具优势。
在市场现有常用的塑胶瓶的瓶身与瓶底连接处过渡圆弧很小、 不明显或接近棱角, 而瓶底无凹槽或有单边较深凹槽。 上述输液瓶 在生产过程中, 易出现瓶子底部出现波浪不平或有凹痕等废瓶和不 良品, 在瓶成型后续工序传输过程中, 瓶底边角易被划伤、 存在应 力集中, 易破损、 开裂、 漏液, 造成损失。 而且, 目前市场上具有 凹槽的输液瓶不易实现匀速直排。 要解决上述问题, 对机器的操作 工人技能要求很高, 机器必需在较低速度运行。 在输液容器的高速 高产、 高效益、 低成本的现实要求下, 是不符合市场需要的。 发明内容
本发明的一个目的是提供高透明、 低成本、 可直排的热塑性材 料吹塑成形的输液容器。
本发明的进一个目的是提供可勾速直排、 制造模具简单、 重量 更轻的高透明、 低成本的热塑性材料吹塑成形的输液容器。
本发明的另一个目的是提供一种用于制造高透明、 低成本、 可 直排的输液容器的聚丙烯。
本发明的另一个目的是提供一种用于制造高透明、 低成本、 可 直排的输液容器的聚丙烯共混物。
本发明的另一个目的是提供一种制造高透明、 低成本、 可直排 的输液容器的方法。
本发明的输液容器, 包括一体成型的口部、肩部、体部和底部, 其特征在于,所述体部的厚度薄于所述口部、所述肩部和所述底部, 从而使得所述输液容器易于向内收缩变形。 优选地, 所述体部厚度 在 0.1mm至 0.8之间。
进一步优选地, 所述体部与所述底部之间具有圆弧过渡段。 较 佳地, 所述圆弧过渡段的高度在 10mm至 30mm之间。
进一步优选地, 所述口部的内径不超过 25mm。 较佳地, 所述 口部的内径不超过 18mm。
进一步优选地, 所述底部具有内陷的凹部。 较佳地, 所述凹部 横向地设于所述底部。 较佳地, 所述凹部宽度约为所述底部长度的 四分之一到二分之一。 较佳地, 所述凹部与所述底部具有圆弧过渡 段。 较佳地, 所述凹部深度在 1.5mm至 8mm之间。 较佳地, 所述 凹部包括第一凹部、 第二凹部和第三凹部, 其中所述第二凹部位于 所述底部的中心, 所述第一凹部和第三凹部对称地设于所述第二凹 部两边。 较佳地, 一吊环可活动地固定在所述底部中心位置。
进一步优选地, 所述输液容器的横截面为椭圆形。
进一步优选地, 所述输液容器用乙烯丙烯共聚物注塑成型的料 胚吹塑而成。 较佳地, 所述料胚的厚度在 2.5mm至 4mm之间。 较 佳地, 所述料胚形状与所述输液容器形状相匹配。 较佳地, 所述料 胚的长度方向拉伸比在 1.9至 2.5之间, 即均除去口部的情况下, 所述料胚高度与所述输液容器高度比在 1 : 1.9在 1 :2.5之间。
在另一个优选的实施例中, 本发明的热塑性材料吹塑成形的输 液容器, 包括一体成型的口部、 肩部、 体部和底部, 其特征在于, 所述体部的厚度均匀, 与所述肩部和所述底部的厚度基本一致, 比 所述口部薄, 从而使得所述输液容器易于向内收缩变形。 体部的厚 度优选在 0.2mm至 0.4mm之间。
进一步优选地, 所述口部、 肩部、 体部和底部之间依次平缓地 圆弧过渡。
进一步优选地, 所述输液容器呈扁平状。
进一步优选地, 所述输液容器的横截面近似于椭圆形。
进一步优选地, 所述口部的内径不超过 25mm。
进一步优选地, 所述口部的内径不超过 18mm。
进一步优选地, 一吊环可活动地固定在所述底部中心位置。 进一步优选地, 所述输液容器用乙烯丙烯共聚物注塑成型的料 胚吹塑而成。
进一步优选地, 所述料胚的厚度在 2.5mm至 4mm之间。
进一步优选地, 所述料胚形状与所述输液容器形状相匹配。 进一步优选地, 所述料胚的长度方向拉伸比在 1.9至 2.5之间, 即均除去口部的情况下, 所述料胚高度与所述输液容器高度比在
1 : 1.9在 1 :2.5之间。
根据本发明的用于制造输液容器的无规乙烯丙烯共聚物, 其中 乙烯含量在 0.5%至 5.0%之间。较佳地, 乙烯含量在 2.5%至 4.0%之 间。 根据本发明的制造输液容器的共混物, 包含: (a) 如前所述的 无规乙烯丙烯共聚物; (b) 热塑性弹性体; 其中热塑性弹性体的含 量在 0.5%至 40%之间。 较佳地, 热塑性弹性体的含量在 1%至 15% 之间。
根据本发明的输液容器的制造方法, 包括:
(a) 将含有乙烯单元的乙烯丙烯共聚物颗粒料或者与热塑性弹 性体共混后的共混物颗粒料置于注塑设备中加热, 塑化后注射入有 一定形状的一个或多个型腔中 (即注塑镌) 中, 保压冷却后, 形成 注塑模要求形状的料胚;
(b) 冷却一段时间后的料胚送进吹塑设备加热, 软化后送入有 一定形状的一个或多个型腔 (即吹塑模) 中, 由拉杆将料胚拉伸至 输液容器要求的高度, 再在胚管通入一定压力的压缩空气, 吹胀并 紧贴在型腔壁上冷却, 保压定型后取出, 成型为输液容器。
较佳地, 通过注塑设备注塑出与输液容器的形状有一定关联性 的料胚。
较佳地, 吹塑设备对料胚进行加热时, 保持料胚口部的温度低 于料胚体部的温度。 附图说明
图 1是本发明的第一实施例的输液容器的正面示意图; 图 2是本发明的第一实施例的输液容器的侧面示意图; 图 3是本发明的第一实施例的输液容器剖面示意图;
图 4是本发明的第一实施例的输液容器的底面示意图; 图 5是本发明的第一实施例的输液容器直排后收縮效果图; 图 6是本发明的第二实施例的输液容器的正面示意图; 图 7是本发明的第二实施例的输液容器的侧面示意图; 图 8是本发明的第二实施例的输液容器的剖面示意图; 图 9是本发明的第二实施例的输液容器的底面示意图; 图 10是本发明的第一实施例的输液容器的制造模具示意图。 图 11是本发明的第二实施例的输液容器的制造模具示意图。 图 12 是本发明的第二实施例的输液容器在直排后的收缩效果 图;
图 13 是本发明的第二实施例的输液容器的时间与流量关系曲 线图;
图 14 是本发明的第二实施例的输液容器的残留液体量与流速 关系曲线图。 具体实施方式
下面结合附图及具体实施例对本发明作进一步详细说明。 输液容器的具体实施例一 如图 1、 图 2、 图 3所示, 本发明的输液容器, 包括口部 1、 肩 部 2、体部 3和底部 4, 体部 3的厚度薄于口部 1、肩部 2和底部 4。 较佳地, 体部 3的厚度在 0.1mm至 0.8mm之间。 使用本发明的输 液容器, 由于体部 3相对较薄, 更利于容器内的液体进行自排。 口 部 1 的内径不超过 25mm, 较佳的内径不超过 18mm, 这样可提高 容器的合格率和吹塑成形的速度。 体部 3与底部 4之间具有圆弧过 渡段 5, 圆弧过渡段 5的高度在 5mm至 30mm之间, 优选在 10mm 至 30mm之间。 在体部 3与底部 4之间的圆弧过渡段 5将有效地防 止应力集中, 而更有效地避免容器被划伤、 破损、 漏液等情况。
底部 4具有内陷的凹部 41, 凹部 41横向地设于底部 4。 在底 部 4设有凹部 41。 凹部 41宽度约为底部 4长度的四分之一至二分 之一之间, 优选为底部 4长度的三分之一。 凹部 41与底部 4之间 具有圆弧过渡段 42, 凹部 41深度在 1.5mm至 8mm之间。 如图 5 所示, 吊环 6通过焊接可活动地固定在第二凹部 41b 中。 凹部 41 包括第一凹部 41a、 第二凹部 41b和第三凹部 41c, 第二凹部 41b 位于底部 4的中心, 第一凹部 41a和第三凹部 41c对称地设于第二 凹部 41b两边。凹部可防止底部产生不规则凹痕、波浪不平等现象。 凹部的圆弧过渡段便于成型和防止应力集中。 第一、 第三凹部对称 分布于底部, 使底部避免出现凸凹不平现象。
如图 4所示, 输液容器的横截面为椭圆形, 这将便于吹塑成型 和实现容器内的液体自排。
图 5是本发明的输液容器直排后收縮效果图。 在使用本发明的 输液容器 10时, 先注入输液体, 然后将塞子 20塞住容器 10的口 部 1, 成气密状。 输液时, 让容器 10倒置后将空心针 30剌入塞子 20, 容器 10的液体便可从空心针 30排出。 由于体部 3的厚度薄于 口部 1、 肩部 2和底部 4, 当输液容器 10的液体排出时, 体部 3会 向里收缩变形。 同时, 体部 3的厚度控制在 0.1mm至 0.8mm之间。 随着液体的减少, 体部 3会自中部发生弯曲并相互接近, 一直到液 体全部排出为止, 容器的形状最终呈扁平状。 因此, 本发明的输液 容器具有很高的液体自排能力。
根据本发明的输液容器用乙烯丙烯共聚物注塑成型的料胚吹 塑而成。 料胚的厚度在 2.5mm至 4mm之间, 形状与输液容器形状 相匹配。 其中, 料胚的长度方向拉伸比在 1.9至 2.5之间, 即均除 去口部的情况下,料胚高度与输液容器高度比在 1: 1.9在 1 :2.5之间。 由此, 可以提高产品的合格率。
本发明的输液容器, 因其透明度、 强度和气体阻隔性得到了大 大的改善, 可成为玻璃输液容器的优良替代品, 以及具有更多优点 的环保型产品。 输液容器的具体实施例二 如图 6、 图 7、 图 8所示, 本发明的输液容器, 包括口部 1、 肩 部 2、 体部 3和底部 4, 体部 3的厚度薄于口部 1, 与肩部 2和底部 4基本一致, 体部 3的厚度优选在 0.2mm至 0.4mm之间。 目前常用 的输液容器瓶的体部厚度在 0.1mm至 0.8mm之间, 瓶体不可做得 过薄以免薄处容易破裂。 口部 1的内径不超过 25mm, 优选的, 内 径为 18mm, 这样可提高容器的合格率和吹塑成形的速度。 体部 3 与底部 4均为圆弧形状, 且圆弧平滑相连使输液容器更接近于偏平 软袋形状。 在体部 3与底部 4的圆弧将有效地防止应力集中, 而更 有效地避免容器被划伤、 破损、 漏液等情况。 与目前输液容器瓶相 比, 本发明的输液容器由于瓶体的结构决定其体部 3更均匀, 所以 整体可做的更薄, 因此重量更轻, 节省原材料, 制造成本也更低。
如图 9所示, 本发明的输液容器的底部 4没有内陷的凹部, 因 此瓶底部的可变形范围大大增加, 使输液容器更易变形且更均匀排 液。
如图 6、 图 7所示, 吊环 5通过焊接可活动地固定在底部 4中 心位置。
如图 9所示, 输液容器的横截面为椭圆形, 这将便于吹塑成型 和实现容器内的液体自排。
图 10是目前底部具有内陷凹部的输液容器的制造模具示意图。 如图所示, 制造输液容器的模具 6包括第一模具 61, 第二模具 62 和第三模具 63。 由于输液瓶底部 4具有内陷的凹部 41, 所以制造 模具需要有专门的底模第三模具 63。 图 11是本发明的不具有内陷 凹部的输液容器的制造模具示意图。 如图所示, 因为输液容器的底 部 4没有内陷的凹部, 所以制造模具不需要有专门的底模, 仅由第 一模具 61和第二模具 62组成, 使模具 6结构更简单, 提高了生产 效率, 降低了成本。 图 12 是本发明的输液容器直排后的收縮效果图。 在使用本发 明的输液容器 10时, 先给输液容器注入输液体, 然后将塞子 20塞 住容器 10的口部 1, 成气密状。 输液时, 在容器 10倒置后将空心 针 30刺入塞子 20, 容器 10的液体便可从空心针 30排出。 由于体 部 3的厚度薄于口部 1, 且与肩部 2和底部 4基本一致, 且体部 3 的厚度控制在 0.2mm至 0.4mm之间,当输液容器 10的液体排出时, 体部 3会向里收缩变形, 随着液体的减少, 体部 3会自中部发生弯 曲并相互接近,一直到液体全部排出为止。由于体部 3的厚度较薄, 且与肩部 2和底部 4的厚度基本一致, 更利于容器内的液体进行匀 速直排。 因此, 本发明的输液容器具有很高的液体匀速直排能力。
根据本发明的输液容器用乙烯丙烯共聚物注塑成型的料胚吹 塑而成。 料胚的厚度在 2.5mm至 4mm之间, 形状与输液容器形状 相匹配。 其中, 料胚的长度方向拉伸比在 1.9至 2.5之间, 即均除 去口部的情况下,料胚高度与输液容器高度比在 1 : 1.9在 1 :2.5之间。 由此, 可以提高产品的合格率。
由显示本发明的时间与流量关系曲线的图 13 可以看出, 输液 曲线接近为一条比例系数相同的直线, 即在相同段时间内输液的流 量基本相同, 由显示残留液体量与流速关系曲线的图 14可以看出, 输液流速曲线基本平滑过渡且趋势一致, 即排液匀速。
本发明的输液容器可匀速直排、 制造模具简单、 重量更轻、 成 本低, 透明度、 强度和气体阻隔性得到了大大的改善, 可成为玻璃 输液容器的优良替代品, 及具有更多优点的环保型产品。 制造输液容器的无规乙烯丙烯共聚物的实施例 根据本发明的乙烯丙烯共聚物, 由丙烯 (propylene) 在聚合化 学反应时, 在聚合物主链 (Polymer Back-bone ) 嵌入乙烯单体变成 共聚聚丙烯 (Copolymer PP )。 共聚聚丙烯有两种: 一是嵌段共聚 (Block Copolymer), 二是无规共聚 (Random Copolymer ) o 只加乙 烯单体时, 一般出现的是无规共聚。 无规共聚是指乙烯在主链的排 列是无规的。 与聚丙烯相比, 将乙烯单体添加在无规共聚聚丙烯中 可改善透明度, 耐寒性, 韧性和加工条件范围。 乙烯单体添加量一 般控制在 0.5-5.0%, 在较为优选的方案中, 乙烯单体添加量在 2.5% 至 4.0%之间。 制造输液容器的共混物的实施例 在聚合形成无规乙烯丙烯共聚物时, 乙烯含量最多可添加 4-5%。 在添加量提高后, 工艺易产生很多问题。 如果再要改善无规 乙烯丙烯共聚物的韧性和柔软性, 需后加工共混热塑性弹性体达到 所需目的。
根据本发明的共混物, 在含有 0.5-5.0%乙烯的乙烯丙烯共聚物 中,热塑性弹性体的一般添加量可在 0.5%至 40%之间,要按用途所 需, 以及热塑性弹性体与聚丙烯塑料的相溶性程度来考虑添加量。 若考虑相溶性和经济性, 一般添加量优选为 1%至 15%是较理想的。 热塑性弹性体加入乙烯丙烯共聚物是一般通过机械共混、 塑化和造 粒。 加入弹性体目的是改善乙烯丙烯共聚物的柔软性, 耐寒性和韧 性。
热塑性弹性体依据用途所需, 可选自聚烯烃热塑性弹性体 (TPO、 TPV等),苯乙烯类热塑性弹性体(SBC、 SBS、 SIS, SEBS、 SEPS等), 和聚氨酯热塑性弹性体 (TPU) 等。 一般来说, 使用本发明的乙烯丙烯共聚物、 上述共混物来制造 输液容器, 途径如下: (a) 将含有乙烯单元的乙烯丙烯共聚物颗粒 料或者与热塑性弹性体共混后的共混物颗粒料置于注塑设备中加 热, 塑化后注射入有一定形状的一个或多个型腔中(即注塑模)中, 保压冷却后, 形成注塑模要求形状的料胚; (b) 冷却一段时间后的 料胚送进吹塑设备加热, 软化后送入有一定形状的一个或多个型腔 (即吹塑模) 中, 由拉杆将料胚拉伸至输液容器要求的高度, 再在 胚管通入一定压力的压缩空气, 吹胀并紧贴在型腔壁上冷却, 保压 定型后取出, 成型为输液容器。 在优选的方案中, 通过注塑设备注 塑出与输液容器的形状有一定关联性的料胚, 以提高成功率。 当吹 塑设备对料胚进行加热时, 保持料胚口部的温度低于料胚体部的温 度, 可进一步提高成功率。 本发明并不局限于上述说明书中公开的内容, 本领域的普通技 术人员完全可采用相同或等同的技术方案进行替代而实现同样的 技术效果和技术目的, 对于这样的修改仍属于本发明的保护范围。

Claims

1、 一种吹塑成形的输液容器, 包括一体成型的口部、 肩部、 体部和底部, 其特征在于, 所述体部的厚度薄于所述口部、 所述肩 部和所述底部, 从而使得所述输液容器易于向内收缩变形。
2、 如权利要求 1 所述的输液容器, 其特征在于, 所述体部厚 度在 0.1mm至 0.8mm之间。
3、 如权利要求 1 或 2所述的输液容器, 其特征在于, 所述体 部与所述底部之间具有圆弧过渡段。
4、 如权利要求 3 所述的输液容器, 其特征在于, 所述圆弧过 渡段的高度在 5mm至 30mm之间。
5、 如权利要求 1、 2所述的输液容器, 其特征在于, 所述口部 的内径不超过 25mm。
6、 如权利要求 5 所述的输液容器, 其特征在于, 所述口部的 内径为 18mm。
7、 如权利要求 1 所述的输液容器, 其特征在于, 所述底部具 有内陷的凹部。
8、 如权利要求 Ί 所述的输液容器, 其特征在于, 所述凹部横 向地设于所述底部。
9、 如权利要求 Ί或 8所述的输液容器, 其特征在于, 所述凹 部宽度约为所述底部长度的四分之一到二分之一。
10、 如权利要求 7或 8 所述的输液容器, 其特征在于, 所述凹 部与所述底部具有圆弧过渡段。
11、 如权利要求 7或 8 所述的输液容器, 其特征在于, 所述凹 部深度在 1.5mm至 8mm之间。
12、 如权利要求 7或 8所述的输液容器, 其特征在于, 所述凹 部包括第一凹部、 第二凹部和第三凹部, 其中所述第二凹部位于所 述底部的中心, 所述第一凹部和第三凹部对称地设于所述第二凹部 两边。
13、 如权利要求 1、 7或 8所述的输液容器, 其特征在于, 一 吊环可活动地固定在所述底部中心位置。
14、 如权利要求 1所述的输液容器, 其特征在于, 所述输液容 器的横截面为椭圆形。
15、 如权利要求 1所述的输液容器, 其特征在于, 所述输液容 器用乙烯丙烯共聚物注塑成型的料胚吹塑而成。
16、 如权利要求 15 所述的输液容器, 其特征在于, 所述料胚 的厚度在 2.5mm至 4mm之间。
17、 如权利要求 15或 16所述的输液容器, 其特征在于, 所述 料胚形状与所述输液容器形状相匹配。
18、 如权利要求 17 所述的输液容器, 其特征在于, 所述料胚 的长度方向拉伸比在 1.9至 2.5之间, 即均除去口部的情况下, 所 述料胚高度与所述输液容器高度比在 1 : 1.9在 1 :2.5之间。
19、 一种热塑性材料吹塑成形的输液容器, 包括一体成型的口 部、 肩部、 体部和底部, 其特征在于, 所述体部的厚度均匀, 与所 述肩部和所述底部的厚度基本一致, 比所述口部薄, 从而使得所述 输液容器易于向内收縮变形。
20、 如权利要求 19 所述的输液容器, 其特征在于, 体部的厚 度在 0.2mm至 0.4mm之间。
21、 如权利要求 20所述的输液容器, 其特征在于, 所述口部、 肩部、 体部和底部之间依次平缓地圆弧过渡。
22、 如权利要求 21 所述的输液容器, 其特征在于, 所述输液 容器呈扁平状。
23、 如权利要求 22 所述的输液容器, 其特征在于, 所述输液 容器的横截面近似于椭圆形。
24、 如权利要求 19、 20、 21、 22或 23所述的输液容器, 其特 征在于, 所述口部的内径不超过 25mm。
25、 如权利要求 24 所述的输液容器, 其特征在于, 所述口部 的内径为 18mm。
26、 如权利要求 19、 20、 21、 22或 23所述的输液容器, 其特 征在于, 一吊环可活动地固定在所述底部中心位置。
27、 如权利要求 19、 20、 21、 22或 23所述的输液容器, 其特 征在于, 所述输液容器用乙烯丙烯共聚物注塑成型的料胚吹塑而 成。
28、 如权利要求 27 所述的输液容器, 其特征在于, 所述料胚 的厚度在 2.5mm至 4mm之间。
29、 如权利要求 28 所述的输液容器, 其特征在于, 所述料胚 形状与所述输液容器形状相匹配。
30、 如权利要求 29 所述的输液容器, 其特征在于, 所述料胚 的长度方向拉伸比在 1.9至 2.5之间, 即均除去口部的情况下, 所 述料胚高度与所述输液容器高度比在 1 : 1.9在 1 :2.5之间。
31、 一种制造输液容器的无规乙烯丙烯共聚物, 其中乙烯含量 在 0.5%至 5.0%之间。
32、 如权利要求 31 所述的无规乙烯丙烯共聚物, 其中乙烯含 量在 2.5%至 4.0%之间。
33、 一种制造输液容器的共混物, 包含:
(a) 权利要求 31或 32所述的无规乙烯丙烯共聚物;
(b) 热塑性弹性体;
其中热塑性弹性体的含量在 0.5%至 40%之间。
34、 如权利要求 33 所述的共混物, 其中热塑性弹性体的含量 在 1 %至 15%之间。
35、 一种输液容器的制造方法, 该方法包括:
(a) 将含有乙烯单元的乙烯丙烯共聚物颗粒料或者与热塑性弹 性体共混后的共混物颗粒料置于注塑设备中加热, 塑化后注射入有 一定形状的一个或多个注塑模型腔中, 保压冷却后, 形成注塑模要 求形状的料胚;
(b) 冷却一段时间后的料胚送进吹塑设备加热, 软化后送入有 一定形状的一个或多个吹塑模型腔中, 由拉杆将料胚拉伸至输液容 器要求的高度, 再在胚管通入一定压力的压缩空气, 吹胀并紧贴在 型腔壁上冷却, 保压定型后取出, 成型为输液容器。
36、 如权利要求 35 的方法, 其特征在于, 通过注塑设备注塑 出与输液容器的形状有一定关联性的料胚。
37、 如权利要求 36 的方法, 其特征在于, 吹塑设备对料胚进 行加热时, 保持料胚口部的温度低于料胚体部的温度。
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