WO2004096525A1 - Method of manufacturing heat-resisting polyester bottles and the products therefrom - Google Patents

Method of manufacturing heat-resisting polyester bottles and the products therefrom 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
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WIPO (PCT)
Prior art keywords
bottle
temperature
mold
manufacturing
resistant polyester
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PCT/CN2004/000389
Other languages
French (fr)
Chinese (zh)
Inventor
Jinhuo Yuan
Haiyong Huang
Weimin Tang
Pinggang Lin
Original Assignee
Jinhuo Yuan
Haiyong Huang
Weimin Tang
Pinggang Lin
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Application filed by Jinhuo Yuan, Haiyong Huang, Weimin Tang, Pinggang Lin filed Critical Jinhuo Yuan
Publication of WO2004096525A1 publication Critical patent/WO2004096525A1/en

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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

Abstract

This invention relates to a method of manufacturing biaxially oriented heat-resisting polyester bottles and the products therefrom. In the method, at first molding parison, then heating the parison and biaxially orienting the parion in a mold is carried out in order. The oriented bottle is kept in the mold, while blowing hot gas at 160-240°C for 0.5-5 seconds, then blowing cooling gas below 100°C. When the bottle is cooled below 100°C, it is taken out of the mold. The hot gas pressure is between 0.5-4.0Mpa, the cooled gas pressure is between 2.5-3.0Mpa, and the mold temperature is between 60-100°C. From this method, it can obtain the optimum crystal and set effect, improve the heat resistance of bottles, rise the temperature for hot filling to 115°C, put up the productivity, and reduce the manufacturing cost, without sticking the mold.

Description

耐高温聚酯瓶的制造方法及其产品 技术领域  Manufacturing method of heat-resistant polyester bottle and product thereof
本发明涉及一种塑料成型加工方法及其产品， 特别是双向拉伸聚酯瓶 的制造方法及其产品。 背景技术  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
双向拉伸方法吹制热灌装用的聚酯瓶是以 PET、 PEN或其共混物为原料, 由注塑机注塑成瓶坯， 瓶还经加热软化后放入模具中进行双向拉伸吹塑, 再 把吹塑成型后的瓶子保持在加热的模具中进行热结晶。  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.
现有方法中， 对瓶子进行热结晶是将模具加热到 130 - 160Ό, 瓶子贴 紧模具升温而获得一定的结晶度。 该方法存在这样的缺陷： 使用高于 130°C 的模具，会使某些低分子物质及分解物析出并粘附于模具，模具需经常清洗, 当模温达到 150~160°C， 每隔 2~ 3小时需要清洗模具一次。 更高的模温将 使瓶子的热量难以被带走， 开模后难以避免瓶子变形， 所以最高模温一般只 能 160°C左右， 吹成的瓶子耐热性一般最高只能达到 96°C。 发明内容  In the existing method, 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
本发明的目的在于克服上述缺陷， 提供一种高结晶度的聚酯瓶生产方 法， 利用该方法可使聚酯瓶的耐热性提高到 115°C。  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.
本发明方法是先制作瓶还， 加热瓶坯， 在模具中双向拉伸瓶坯， 将双 向拉伸后的瓶子保持在模具中， 往瓶子内腔吹入 160~ 240°C的热气加热 0.5~5秒后， 吹入低于 100°C冷气， 瓶子冷却至 100°C以下时开模取瓶。  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.
本方法中， 模具最好适当加热， 以减少瓶子与模具之间的温度梯度， 模具温度最好保持 60~ 1Q(TC， 优选是 80~90°C。  In this method, 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).
吹入瓶子内腔的热气温度最好不超过瓶坯所用聚酯材料的熔点 243 ~ 260 , 便于生产过程的操作及控制, 最好低于所用聚酯加料的熔点 20°C以 下， 釆用温度较低的热气， 加热时间应稍长， 为有利于生产效率， 热气温度 最好为 170~ 230°C， 更优选是 200 ~ 220°C。 本发明中， 热气可以釆用加热的压缩空气或惰性气体。 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. In order to facilitate production efficiency, the hot gas temperature is preferably 170 ~ 230 ° C, more preferably 200 ~ 220 ° C. In the present invention, heated compressed air or inert gas may be used as the hot gas.
热气应保持有 0. 5 - 4. OMpa 的压力， 较好是 2. 5 - 3. 0 Mpa。 热气加热 时间最好是 1 ~ 3秒。  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.
本方法中， 冷却用的冷气可使用常温或制冷的压缩空气。 在向瓶子通 入冷气降温阶段， 瓶于温度降至 100°C之前, 冷气压力最好保持 2. 5 - 3. 0 MPa, 以免瓶子收缩变形。  In this method, normal temperature or refrigerated compressed air can be used as the cold air for cooling. Before cooling the bottle with cold air, 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.
本方法适用的材料可以是吹瓶级均聚对苯二甲酸乙二醇酯, 或对苯二 甲酸、 间苯二甲酸和乙二醇共聚物， 或者是加入改性助剂的 PET、 PEN材料 或其共混物。  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.
本方法所用的瓶坯， 可以是单层树脂层注塑成型的单层管， 也可以是 多层树脂层共注塑成型的多层管。  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.
本发明中， 在对瓶坯进行拉伸吹塑之前， 最好先对瓶口部位作热结晶 处理， 以免在吹热气过程发生变形。 应作结晶处理的瓶口部位包括螺紋口、 受力环及其以下 3 ~ 6 亳米在吹瓶过程中尺寸没有改变的部分， 其结晶度最 好达到 50 ~ 52 %。  In the present invention, 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%.
本发明与现有成型方法相比， 具有下述优点：  Compared with the existing molding method, the present invention has the following advantages:
1. 本方法使瓶于内壁受热升温， 快速达到所需的结晶度， 生产的聚酯 瓶具有较高的耐热性， 热灌装温度可达 115 °C , 且具有较好的气体阻隔性； . 采用均聚对苯二甲酸乙二醇酯时， 最高耐热性可达 120°C , 从而开拓了聚酯 瓶的新应用， 如牛奶瓶、 蒸煮瓶等。  1. 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. When using homopolyethylene terephthalate, the highest heat resistance can reach 120 ° C, which opens up new applications for polyester bottles, such as milk bottles, cooking bottles, etc.
2. 模具温度低， 不出现粘模现象； 瓶子降温速度快， 因而提高了生产 效率， 降低生产成本。  2. 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.
3. 瓶子结晶定型性好， 瓶子可放置更长时间而保持成型时的耐热性； 3. The bottle has good crystallinity, and the bottle can be left for a longer time while maintaining the heat resistance during molding;
4. 当所需的耐热性为 90°C以下时， 瓶子的重量可大大减少， 如用现有 方法， 500 ml瓶的重量不少于 32克， 而用本方法， 重量可减少至 26克。 4. When the required heat resistance is below 90 ° C, the weight of the bottle can be greatly reduced. For example, using the existing method, 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.
具体实施方式  detailed description
后面列出的表格是应用本发明方法吹制聚酯瓶的实施例的工艺参数和 相应制得聚酯瓶的理化参数。  The tables listed below are the process parameters of the examples of the polyester bottles blown by the method of the present invention and the corresponding physical and chemical parameters of polyester bottles.
实施例中， 吹制方法可概括为： 注塑成型瓶坯一瓶口热结晶处理一红 外线加热瓶坯一双向拉伸瓶坯 （预吹） 一吹热气热结晶瓶子一冷气冷却一开 模， 完成一个吹瓶周期。 In the embodiment, 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.
在双向拉伸瓶坯之前， 对瓶口及受力环以下约 4 亳米的部分进行热结 曰  Before biaxially stretching the preform, heat-bond about 4 mm below the mouth of the bottle and the force ring.
ΗΘ。  ΗΘ.
模具保持在 85 °C左右。 加工过程模具可能吸热升温, 需要适当降温。 经过红外线加热变软的瓶坯先进行预吹: 将瓶坯放入模具中， 由机械 方式开始纵向拉伸瓶坯后, 通入预吹气横向拉伸。 预吹气的温度约 80 Ό , 压力约 1. 0Mpa。  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 Ό, and the pressure is about 1.0Mpa.
实施例中， 瓶坯为圆简形， 重量 32克， 吹制后成为容量为 500ml 的圆 瓶。 拉伸时， 瓶口及受力环以下约 4亳米的部分拉伸时尺寸没有改变。 瓶颈 下方约 4亳米以下被拉伸的部分，其直径拉伸比为 2. 4倍，高度拉伸比为 2. 3 倍。  In the embodiment, the bottle blank is round and simple, weighs 32 grams, and is blown into a round bottle with a capacity of 500 ml. When stretched, 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.
预吹后， 向瓶子内腔通入加热的压缩空气， 压力 3. OMpa 左右， 温度和 吹热气时间如表中所示。 吹热气时， 用限压阀放气使热气处于流动状态， 有 利于热交换。  After pre-blowing, heat the compressed air into the bottle cavity. 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.
吹热气后， 向瓶子内腔通入常温压缩空气， 压力在 3. OMpa 左右， 并使 压缩空气处于流动状态。 冷却 2秒后， 瓶子温度一般会降到 10(TC以下， 这 时可打开模具， 取下成型的瓶子。  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.
本方法连续生产 5天后， 模具仍保持清洁， 不出现粘模现象。  After 5 days of continuous production by this method, the mold is still kept clean and no mold sticking occurs.
将各工艺参数制得的瓶于灌装表中所列温度的石蜡油， 然后测定其体 积缩小情况。 从表 1 中可以看到， 115 °C下热灌装时瓶于的收缩率小于标准 使用要求 3 %的水准， 因此， 由本方法制得的聚酯瓶可适用于 115 °C下的热 灌装。 表 1 The bottles prepared by each process parameter were filled with paraffin oil at the temperature listed in the filling table, and then the volume reduction was measured. It can be seen from Table 1 that the shrinkage of the bottle during hot filling at 115 ° C is less than the standard requirement of 3%. Therefore, the polyester bottle produced by this method can be suitable for hot filling at 115 ° C. Installed. Table 1
热气温 吹热气 吹热气 吹冷气 100 。C 105 °C 110 °C 115 °C 度 压 力 时 间 时 间 收缩率 收缩率 收缩率 收缩率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
( °C ) ( Mpa (秒） (秒） ( % ) ( % ) ( % ) ( % ) (° C) (Mpa (second) (second) (%) (%) (%) (%)
)  )
180 3. 0 1. 5 2 2. 01 2. 20 2. 30 2. 60 180 3. 0 1. 5 2 2. 01 2. 20 2. 30 2. 60
180 3. 0 2. 5 2 1. 97 2. 12 2. 20 2. 40180 3. 0 2. 5 2 1. 97 2. 12 2. 20 2. 40
220 3. 0 1. 5 2 1. 92 2. 10 2. 18 2. 22220 3. 0 1. 5 2 1. 92 2. 10 2. 18 2. 22
220 3. 0 2. 5 2 1. 9 2. 08 2. 15 2. 20220 3. 0 2. 5 2 1. 9 2. 08 2. 15 2. 20
230 3. 0 1. 0 2 1. 88 1. 98 2. 12 2. 18230 3. 0 1. 0 2 1. 88 1. 98 2. 12 2. 18
230 3. 0 1. 5 2 1. 85 1. 9 2. 08 2. 14 230 3. 0 1. 5 2 1. 85 1. 9 2. 08 2. 14

Claims

杈 利 要 求 Profit requirements
1. 一种耐高温聚酯瓶的制造方法, 先制作瓶坯, 加热瓶坯, 在模具中 双向拉伸瓶坯， 其特征在于， 将双向拉伸后的瓶子保持在模具中 , 往瓶子内 腔吹入 160 - 240 °C的热气加热 0. 5 - 5秒后， 吹入低于 10Q °C冷气， 瓶于冷 却至 100 °C以下时开模取瓶。 1. A method for manufacturing a high-temperature-resistant polyester bottle, first manufacturing a preform, heating the preform, and bidirectionally stretching the preform in a mold, characterized in that the biaxially stretched bottle is held in the mold and is poured into the bottle Hot air at 160-240 ° C is blown into the cavity. After 0.5-5 seconds, cold air below 10Q ° C is blown. When the bottle is cooled to below 100 ° C, the mold is opened and the bottle is taken.
2. 根据权利要求 1 所述耐高温聚酯瓶的制造方法， 其特征在于， 所述 模具模温保持 60 ~ 10(TC。  2. The method for manufacturing a high-temperature-resistant polyester bottle according to claim 1, wherein the mold temperature is maintained at 60 to 10 ° C.
3. 根据杈利要求 1 所述耐高温聚酯瓶的制造方法， 其特征在于， 所述 热气温度为 170— 230 °C。  3. The method for manufacturing a high-temperature-resistant polyester bottle according to claim 1, wherein the temperature of the hot gas is 170-230 ° C.
4. 根据权利要求 3 所述耐高温聚酯瓶的制造方法， 其特征在于， 所述 热气温度为 200 - 230 °C。  4. The method for manufacturing a high-temperature-resistant polyester bottle according to claim 3, wherein the hot gas temperature is 200-230 ° C.
5. 根据杈利要求 1 所述耐高温聚酯瓶的制造方法， 其特征在于， 所述 热气加热时间 1 ~ 3秒。  5. The method for manufacturing a high-temperature-resistant polyester bottle according to claim 1, wherein the hot gas heating time is 1 to 3 seconds.
6. 根据权利里求 1 所述耐高温聚酯瓶的制造方法， 其特征在于， 所述 热气在瓶子内腔保持有 0. 5 - 4. OMpa的压力。  6. The method for manufacturing a high-temperature-resistant polyester bottle according to claim 1, wherein the hot gas is maintained at a pressure of 0.5-4. OMpa in the inner cavity of the bottle.
7. 根据杈利婴求 6 所述耐高温聚酯瓶的制造方法， 其特征在于， 所述 热气在瓶子内胜保持有 2. 5 - 3. OMpa的比力。  7. The method for manufacturing a high-temperature-resistant polyester bottle according to Chili Yingqiu 6, characterized in that the hot gas maintains a specific force of 2.5-3. OMpa in the bottle.
8. 根据权利要求 1 所述耐高温聚酯瓶的制造方法， 其特征在于， 在瓶 子温度降至 100°C之前， 冷气压力保持 2. 5 - 0 Mpa。 8. A method for producing a high temperature resistant polyester bottle according to claim 1, characterized in that the bottle before the temperature was lowered to 100 ° C, the cold air pressure was maintained 2 5 -. 0 Mpa.
9. 根据权利要求 1 所述耐高温聚酯瓶的制造方法， 其特征在于， 所述 冷气为常温空气或制冷空气。  9. The method for manufacturing a high temperature resistant polyester bottle according to claim 1, wherein the cold air is normal temperature air or refrigerated air.
10. 根据杈利要求 1所述耐高温聚酯瓶的制造方法制得的聚酯瓶。  10. A polyester bottle made according to the manufacturing method of a high temperature resistant polyester bottle according to claim 1.
PCT/CN2004/000389 2003-04-25 2004-04-23 Method of manufacturing heat-resisting polyester bottles and the products therefrom WO2004096525A1 (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008000704A2 (en) * 2006-06-29 2008-01-03 Techne Technipack Engineering Italia S.P.A. Method and equipment for cooling blow moulded or thermoformed articles
CN114467897A (en) * 2021-10-12 2022-05-13 苏州瑞亨塑胶制品有限公司 Method for processing and manufacturing transparent electric heating mosquito-repellent incense liquid bottle body
CN114919154A (en) * 2022-06-01 2022-08-19 苏州瑞亨塑胶制品有限公司 Processing and forming process of electric heating mosquito-repellent incense liquid bottle body

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101508171B (en) * 2009-03-31 2013-12-25 湖南千山制药机械股份有限公司 Method for reducing deformation of large transfusion PP bottle in follow-up high temperature sterilization process
CN101961913A (en) * 2009-07-23 2011-02-02 乌鲁木齐华佳成医药包装有限公司 Process for blowing polypropylene infusion bottle under low air pressure
CN107953539A (en) * 2017-11-01 2018-04-24 中山市邦信电子科技发展有限公司 A kind of full-automatic blowing molding machine and its intake method

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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 (en) * 1987-05-13 1988-11-17 Tokan Kogyo Co Ltd Manufacture of synthetic resin container
US4863046A (en) * 1987-12-24 1989-09-05 Continental Pet Technologies, Inc. Hot fill container
JPH01310933A (en) * 1988-06-08 1989-12-15 Tokan Kogyo Co Ltd Preparation of container made of synthetic resin
CN1134344A (en) * 1995-03-09 1996-10-30 三井石油化学工业株式会社 Bottle from polyester composition and process for producing
CN1223196A (en) * 1997-11-14 1999-07-21 厦门市立精实业有限公司 Method for forming polyethylene glycol terephthalate (PET) thermal-resistant bottle
WO2001062471A1 (en) * 2000-02-25 2001-08-30 Tjandra Limanjaya Hot fill container

Patent Citations (8)

* 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 (en) * 1987-05-13 1988-11-17 Tokan Kogyo Co Ltd Manufacture of synthetic resin container
US4863046A (en) * 1987-12-24 1989-09-05 Continental Pet Technologies, Inc. Hot fill container
JPH01310933A (en) * 1988-06-08 1989-12-15 Tokan Kogyo Co Ltd Preparation of container made of synthetic resin
CN1134344A (en) * 1995-03-09 1996-10-30 三井石油化学工业株式会社 Bottle from polyester composition and process for producing
CN1223196A (en) * 1997-11-14 1999-07-21 厦门市立精实业有限公司 Method for forming polyethylene glycol terephthalate (PET) thermal-resistant bottle
WO2001062471A1 (en) * 2000-02-25 2001-08-30 Tjandra Limanjaya Hot fill container

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008000704A2 (en) * 2006-06-29 2008-01-03 Techne Technipack Engineering Italia S.P.A. Method and equipment for cooling blow moulded or thermoformed articles
WO2008000704A3 (en) * 2006-06-29 2008-04-10 Techne Technipack Engineering Method and equipment for cooling blow moulded or thermoformed articles
CN114467897A (en) * 2021-10-12 2022-05-13 苏州瑞亨塑胶制品有限公司 Method for processing and manufacturing transparent electric heating mosquito-repellent incense liquid bottle body
CN114919154A (en) * 2022-06-01 2022-08-19 苏州瑞亨塑胶制品有限公司 Processing and forming process of electric heating mosquito-repellent incense liquid bottle body

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