WO2004096525A1 - Procede de fabrication de bouteilles en polyester resistant a la chaleur et produits fabriques selon ce procede - Google Patents

Procede de fabrication de bouteilles en polyester resistant a la chaleur et produits fabriques selon ce procede Download PDF

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Publication number
WO2004096525A1
WO2004096525A1 PCT/CN2004/000389 CN2004000389W WO2004096525A1 WO 2004096525 A1 WO2004096525 A1 WO 2004096525A1 CN 2004000389 W CN2004000389 W CN 2004000389W WO 2004096525 A1 WO2004096525 A1 WO 2004096525A1
Authority
WO
WIPO (PCT)
Prior art keywords
bottle
temperature
mold
manufacturing
resistant polyester
Prior art date
Application number
PCT/CN2004/000389
Other languages
English (en)
Chinese (zh)
Inventor
Jinhuo Yuan
Haiyong Huang
Weimin Tang
Pinggang Lin
Original Assignee
Jinhuo Yuan
Haiyong Huang
Weimin Tang
Pinggang Lin
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 Jinhuo Yuan, Haiyong Huang, Weimin Tang, Pinggang Lin filed Critical Jinhuo Yuan
Publication of WO2004096525A1 publication Critical patent/WO2004096525A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
    • B29C49/42—Component parts, details or accessories; Auxiliary operations
    • B29C49/64—Heating or cooling preforms, parisons or blown articles
    • B29C49/66—Cooling by refrigerant introduced into the blown article
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
    • B29C49/42—Component parts, details or accessories; Auxiliary operations
    • B29C49/64—Heating or cooling preforms, parisons or blown articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
    • B29C49/42—Component parts, details or accessories; Auxiliary operations
    • B29C49/78—Measuring, controlling or regulating
    • B29C49/783—Measuring, controlling or regulating blowing pressure
    • B29C2049/7831—Measuring, controlling or regulating blowing pressure characterised by pressure values or ranges
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
    • B29C49/42—Component parts, details or accessories; Auxiliary operations
    • B29C49/78—Measuring, controlling or regulating
    • B29C49/783—Measuring, controlling or regulating blowing pressure
    • B29C2049/7832—Blowing with two or more pressure levels
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
    • B29C49/42—Component parts, details or accessories; Auxiliary operations
    • B29C49/78—Measuring, controlling or regulating
    • B29C49/786—Temperature
    • B29C2049/7864—Temperature of the mould
    • B29C2049/78645—Temperature of the mould characterised by temperature values or ranges
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
    • B29C49/42—Component parts, details or accessories; Auxiliary operations
    • B29C49/78—Measuring, controlling or regulating
    • B29C49/786—Temperature
    • B29C2049/7866—Temperature of the blowing medium
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
    • B29C49/42—Component parts, details or accessories; Auxiliary operations
    • B29C49/64—Heating or cooling preforms, parisons or blown articles
    • B29C49/6604—Thermal conditioning of the blown article
    • B29C49/6605—Heating the article, e.g. for hot fill

Definitions

  • the invention relates to a plastic molding processing method and a product thereof, in particular to a manufacturing method of a biaxially stretched polyester bottle and a product thereof. Background technique
  • PET bottle for hot filling is blown by biaxial stretching method.
  • PET, PEN or blends are used as raw materials.
  • the preform is injection molded by an injection molding machine.
  • the bottle is also heated and softened and placed in a mold for biaxial stretching. Mold, and then keep the blow-molded bottle in a heated mold for thermal crystallization.
  • the bottle is thermally crystallized by heating the mold to 130-160 ° F, and the bottle is heated close to the mold to obtain a certain degree of crystallinity.
  • This method has such defects: using a mold higher than 130 ° C will cause some low molecular substances and decomposition products to precipitate and adhere to the mold.
  • the mold must be cleaned frequently. When the mold temperature reaches 150 ⁇ 160 ° C, The mold needs to be cleaned once every 2-3 hours. Higher mold temperature will make it difficult to remove the heat from the bottle, and it is difficult to avoid bottle deformation after the mold is opened. Therefore, the maximum mold temperature is generally only about 160 ° C, and the heat resistance of the blown bottle is generally only up to 96 ° C. . Summary of the Invention
  • the purpose of the present invention is to overcome the above-mentioned drawbacks and provide a method for producing a polyester bottle with high crystallinity, which can improve the heat resistance of the polyester bottle to 115 ° C.
  • the method of the present invention is to first make a bottle, heat the preform, stretch the preform bidirectionally in the mold, hold the biaxially stretched bottle in the mold, and blow hot air at 160 ⁇ 240 ° C into the inner cavity of the bottle to heat it for 0.5 ⁇ After 5 seconds, blow in cold air below 100 ° C. When the bottle cools below 100 ° C, open the mold and take the bottle.
  • the mold is preferably heated appropriately to reduce the temperature gradient between the bottle and the mold, and the mold temperature is preferably maintained at 60 ⁇ 1Q (TC, preferably 80 ⁇ 90 ° C).
  • the temperature of the hot gas blown into the inner cavity of the bottle should not exceed the melting point of the polyester material used for the preform. 243 ⁇ 260, which is convenient for the operation and control of the production process, and it is preferably lower than the melting point of the polyester additive used below 20 ° C. For lower hot gas, the heating time should be slightly longer.
  • the hot gas temperature is preferably 170 ⁇ 230 ° C, more preferably 200 ⁇ 220 ° C.
  • heated compressed air or inert gas may be used as the hot gas.
  • the hot gas should be maintained at a pressure of 0.5-4. OMpa, preferably 2.5-3. 0 Mpa.
  • the hot gas heating time is preferably 1 to 3 seconds.
  • normal temperature or refrigerated compressed air can be used as the cold air for cooling.
  • the temperature of the cold air should be kept at 2. 5-3. 0 MPa before the temperature of the bottle drops to 100 ° C, so as not to shrink and deform the bottle.
  • Suitable materials for this method can be blow-moulded homopolyethylene terephthalate, or terephthalic acid, isophthalic acid, and ethylene glycol copolymers, or PET and PEN materials with modified additives Or a blend thereof.
  • the preform used in this method may be a single-layer pipe formed by injection molding of a single resin layer, or a multi-layer pipe formed by injection molding of multiple resin layers.
  • the preform before stretch-blow molding the preform, it is preferable to perform thermal crystallization treatment on the mouth of the bottle to avoid deformation during the process of blowing hot gas.
  • the parts of the bottle mouth that should be crystallized include the threaded mouth, the force ring and the 3 to 6 mm below it.
  • the part that has not changed in size during the blowing process has a crystallinity of preferably 50 to 52%.
  • the present invention has the following advantages:
  • This method heats and heats the bottle on the inner wall to quickly reach the required crystallinity.
  • the produced polyester bottle has high heat resistance, hot filling temperature can reach 115 ° C, and has good gas barrier properties.
  • the highest heat resistance can reach 120 ° C, which opens up new applications for polyester bottles, such as milk bottles, cooking bottles, etc.
  • the mold temperature is low, and no mold sticking phenomenon occurs; the bottle cooling speed is fast, which improves the production efficiency and reduces the production cost.
  • the bottle has good crystallinity, and the bottle can be left for a longer time while maintaining the heat resistance during molding;
  • the weight of the bottle can be greatly reduced.
  • the weight of a 500 ml bottle is not less than 32 grams, and with this method, the weight can be reduced to 26 G.
  • the blowing method can be summarized as follows: injection molding preform, one bottle mouth, thermal crystallization treatment, one red Externally heated bottle preforms-biaxially stretched bottle preforms (pre-blow)-blow hot gas to heat crystallize bottles-cool air cooling-open mold, complete a bottle blowing cycle.
  • the mold is kept at about 85 ° C. During processing, the mold may heat up and need to be cooled appropriately.
  • the preform that has been softened by infrared heating is pre-blown: the preform is placed in a mold, and the preform is stretched longitudinally by mechanical means, and then pre-blown and stretched laterally.
  • the pre-blowing temperature is about 80 ⁇ , and the pressure is about 1.0Mpa.
  • the bottle blank is round and simple, weighs 32 grams, and is blown into a round bottle with a capacity of 500 ml.
  • the size of the bottle mouth and the force ring about 4 mm below the stretched ring did not change.
  • the portion stretched below about 4mm below the bottleneck has a diameter stretch ratio of 2.4 times and a height stretch ratio of 2.3 times.
  • the pressure is about 3. OMpa.
  • the temperature and hot air blowing time are shown in the table. When blowing hot air, use a pressure-limiting valve to deflate to keep the hot air in a flowing state, which is conducive to heat exchange.
  • the hot air After the hot air is blown, normal temperature compressed air is introduced into the bottle cavity, the pressure is about 3. OMpa, and the compressed air is in a flowing state. After cooling for 2 seconds, the temperature of the bottle will generally drop below 10 ° C. At this time, the mold can be opened and the formed bottle can be removed.
  • Hot air blowing hot air blowing hot air blowing hot air blowing cold air 100 C 105 ° C 110 ° C 115 ° C Degrees Pressure Time Time Shrinkage Shrinkage Shrinkage Shrinkage Shrinkage Shrinkage Shrinkage Shrinkage

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  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
  • Containers Having Bodies Formed In One Piece (AREA)

Abstract

La présente invention se rapporte à un procédé qui permet de fabriquer des bouteilles en polyester résistant à la chaleur à orientation biaxiale, et aux produits fabriqués selon ce procédé. Selon le procédé de l'invention, on effectue d'abord une paraison de moulage, on chauffe ensuite la paraison et l'on oriente enfin axialement la paraison dans un moule. La bouteille orientée est maintenue dans le moule, tandis que du gaz chaud est soufflé à une température de 160 à 240°C pendant 0,5 à 5 secondes, et qu'un gaz de refroidissement est soufflé à une température inférieure à 100°C. Lorsque la bouteille s'est refroidie à une température inférieure à 100°C, on la retire du moule. La pression du gaz chaud est comprise entre 0,5 et 4,0 Mpa, la pression du gaz de refroidissement est comprise entre 2,5 et 3,0 Mpa, et la température du moule est comprise entre 60 et 100°C. Le procédé de l'invention permet d'obtenir une cristallisation et une déformation rémanente optimales, d'améliorer la résistance à la chaleur des bouteilles, d'augmenter la température de remplissage à chaud jusqu'à 115°C, d'augmenter la productivité et de réduire les coûts de fabrication, sans que la bouteille ne colle au moule.
PCT/CN2004/000389 2003-04-25 2004-04-23 Procede de fabrication de bouteilles en polyester resistant a la chaleur et produits fabriques selon ce procede WO2004096525A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN03114345.8 2003-04-25
CN03114345.8A CN1286631C (zh) 2003-04-25 2003-04-25 耐高温聚酯瓶的制造方法及其产品

Publications (1)

Publication Number Publication Date
WO2004096525A1 true WO2004096525A1 (fr) 2004-11-11

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PCT/CN2004/000389 WO2004096525A1 (fr) 2003-04-25 2004-04-23 Procede de fabrication de bouteilles en polyester resistant a la chaleur et produits fabriques selon ce procede

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CN (1) CN1286631C (fr)
WO (1) WO2004096525A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008000704A2 (fr) * 2006-06-29 2008-01-03 Techne Technipack Engineering Italia S.P.A. Procédé et équipement permettant de réduire les durées de cycle de machines de production d'articles en matière thermoplastique
CN114467897A (zh) * 2021-10-12 2022-05-13 苏州瑞亨塑胶制品有限公司 一种透明电热蚊香液瓶体加工制作方法
CN114919154A (zh) * 2022-06-01 2022-08-19 苏州瑞亨塑胶制品有限公司 一种电热蚊香液瓶体加工成型工艺

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101508171B (zh) * 2009-03-31 2013-12-25 湖南千山制药机械股份有限公司 减少大输液pp瓶在后续高温灭菌过程中变形的方法
CN101961913A (zh) * 2009-07-23 2011-02-02 乌鲁木齐华佳成医药包装有限公司 低气压吹制聚丙烯输液瓶工艺
CN107953539A (zh) * 2017-11-01 2018-04-24 中山市邦信电子科技发展有限公司 一种全自动吹塑成型机及其进气方式

Citations (8)

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US4039641A (en) * 1974-12-03 1977-08-02 Imperial Chemical Industries Limited Plastics container manufacture
US4264558A (en) * 1974-09-24 1981-04-28 Plm Aktiebolag Method of producing plastic containers for storage of goods under pressure
JPS63280615A (ja) * 1987-05-13 1988-11-17 Tokan Kogyo Co Ltd 合成樹脂製容器の製造方法
US4863046A (en) * 1987-12-24 1989-09-05 Continental Pet Technologies, Inc. Hot fill container
JPH01310933A (ja) * 1988-06-08 1989-12-15 Tokan Kogyo Co Ltd 合成樹脂製容器の製造方法
CN1134344A (zh) * 1995-03-09 1996-10-30 三井石油化学工业株式会社 聚酯组合物瓶子和它的制备方法
CN1223196A (zh) * 1997-11-14 1999-07-21 厦门市立精实业有限公司 聚对苯二甲酸乙二醇酯耐热瓶(pet)成型方法
WO2001062471A1 (fr) * 2000-02-25 2001-08-30 Tjandra Limanjaya Recipient de remplissage a chaud

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4264558A (en) * 1974-09-24 1981-04-28 Plm Aktiebolag Method of producing plastic containers for storage of goods under pressure
US4039641A (en) * 1974-12-03 1977-08-02 Imperial Chemical Industries Limited Plastics container manufacture
JPS63280615A (ja) * 1987-05-13 1988-11-17 Tokan Kogyo Co Ltd 合成樹脂製容器の製造方法
US4863046A (en) * 1987-12-24 1989-09-05 Continental Pet Technologies, Inc. Hot fill container
JPH01310933A (ja) * 1988-06-08 1989-12-15 Tokan Kogyo Co Ltd 合成樹脂製容器の製造方法
CN1134344A (zh) * 1995-03-09 1996-10-30 三井石油化学工业株式会社 聚酯组合物瓶子和它的制备方法
CN1223196A (zh) * 1997-11-14 1999-07-21 厦门市立精实业有限公司 聚对苯二甲酸乙二醇酯耐热瓶(pet)成型方法
WO2001062471A1 (fr) * 2000-02-25 2001-08-30 Tjandra Limanjaya Recipient de remplissage a chaud

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008000704A2 (fr) * 2006-06-29 2008-01-03 Techne Technipack Engineering Italia S.P.A. Procédé et équipement permettant de réduire les durées de cycle de machines de production d'articles en matière thermoplastique
WO2008000704A3 (fr) * 2006-06-29 2008-04-10 Techne Technipack Engineering Procédé et équipement permettant de réduire les durées de cycle de machines de production d'articles en matière thermoplastique
CN114467897A (zh) * 2021-10-12 2022-05-13 苏州瑞亨塑胶制品有限公司 一种透明电热蚊香液瓶体加工制作方法
CN114919154A (zh) * 2022-06-01 2022-08-19 苏州瑞亨塑胶制品有限公司 一种电热蚊香液瓶体加工成型工艺

Also Published As

Publication number Publication date
CN1539624A (zh) 2004-10-27
CN1286631C (zh) 2006-11-29

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