WO2009001475A1 - 耐熱圧性ポリエステルボトル及びその製造方法 - Google Patents
耐熱圧性ポリエステルボトル及びその製造方法 Download PDFInfo
- Publication number
- WO2009001475A1 WO2009001475A1 PCT/JP2007/063196 JP2007063196W WO2009001475A1 WO 2009001475 A1 WO2009001475 A1 WO 2009001475A1 JP 2007063196 W JP2007063196 W JP 2007063196W WO 2009001475 A1 WO2009001475 A1 WO 2009001475A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- heat
- molded product
- neck
- blow molding
- pressure
- Prior art date
Links
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material
- B29K2023/04—Polymers of ethylene
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- B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material
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- B29K2067/00—Use of polyesters or derivatives thereof, as moulding material
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/712—Containers; Packaging elements or accessories, Packages
- B29L2031/7158—Bottles
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- 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
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
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- 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
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- 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
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
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- Y10T428/13—Hollow or container type article [e.g., tube, vase, etc.]
- Y10T428/1352—Polymer or resin containing [i.e., natural or synthetic]
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- 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
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/13—Hollow or container type article [e.g., tube, vase, etc.]
- Y10T428/1352—Polymer or resin containing [i.e., natural or synthetic]
- Y10T428/1355—Elemental metal containing [e.g., substrate, foil, film, coating, etc.]
- Y10T428/1359—Three or more layers [continuous layer]
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- 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
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/13—Hollow or container type article [e.g., tube, vase, etc.]
- Y10T428/1352—Polymer or resin containing [i.e., natural or synthetic]
- Y10T428/139—Open-ended, self-supporting conduit, cylinder, or tube-type article
Definitions
- the present invention relates to a heat-resistant and pressure-resistant polyester bottle and a method for producing the same, and more specifically, a so-called crane neck-shaped thermo-pressure-resistant polyester pot and a ratio of a neck portion with respect to the total height of the bottle that is longer than that of a known polyester pot. It relates to the manufacturing method. Background art
- thermoplastic polyester such as polyethylene terephthalate (PET)
- PET polyethylene terephthalate
- PET polyethylene terephthalate
- PET polyethylene terephthalate
- polyester bottles have the disadvantage of being inferior in heat resistance, and cause heat deformation and volume shrinkage when the contents are hot filled. Set operation is being performed.
- beer is conventionally filled in glass bottles or cans, but as a form of packaging container for beer, a biaxial stretch blow molded bottle made of polyester that is lightweight and has excellent impact resistance. It is desired to fill beer.
- the shape of the neck of the glass bottle is particularly slender, that is, the cross-sectional strength is smaller than that of the body, and the so-called crane neck-shaped glass bottle is popular as a general container for beer.
- Such a polyester pottor is also desired to have a so-called crane neck shape having a long neck length, which is popular as a beer bottle shape. Disclosure of the invention
- the polyester resin has a hygroscopic property, and the higher the moisture absorption rate, the more likely to be cleaved.
- the volume of the bottle expands due to heat and pressure.
- the liquid level of the liquid at the neck The decrease is conspicuous and may cause misunderstandings such as insufficient filling capacity. For this reason, conventionally, it has been unavoidable to form a polyester pottor having a shape that extends from the mouth as described above, through the short neck, to the shoulder, torso, and bottom.
- an object of the present invention is a polyester resin bottle having a so-called crane neck shape that is suitable for containing beer as a content, and a polyester resin bottle that does not destroy the impression of a conventional glass bottled beer and a method for producing the same Is to provide.
- Another object of the present invention is that the moisture absorption of the polyester resin is effectively prevented, and even if the shape has a narrow cross-sectional diameter and a neck having a crane neck shape, the above-described problems do not occur, and heat resistance is improved. It is to provide a pressure-resistant polyester pot and a production method thereof.
- the length of the neck portion is the mouth portion.
- the bottle height is in the range of 10 to 40%
- the neck crystallinity is in the range of 20 to 35%
- the body crystallinity is in the range of 35 to 50%.
- the moisture absorption rate of the body after storage for 7 days under the conditions of temperature 30 ° C and humidity 80% RH is 3 O O O p pm or less
- a primary blow molding step for obtaining a primary molded product by biaxial stretching blow molding a preform made of a polyester resin, and a heat treatment for obtaining a secondary molded product obtained by heat-treating the primary molded product to cause heat shrinkage.
- the processing amount expressed by the volume ratio of the final molded product in the secondary blow molding process is 20 to 40 V o I%
- the mold temperature of the neck in the primary blow molding process is in the range of 15 to 60 ° C, and the mold temperature corresponding to the other parts is in the range of 60 to 150 ° C.
- the mold temperature in the secondary blow molding process is in the range of 15 to 60 ° C.
- the length of the neck is the height of the pothole excluding the mouth.
- the first important characteristic is that the height H is in the range of 10 to 40 o / o.
- FIG. 1 is a side sectional view showing an example of the heat and pressure-resistant polyester bottle of the present invention.
- the heat and pressure-resistant polyester bottle of the present invention which is indicated as a whole by 1, generally has a mouth 2 and a crane neck 3. It consists of a shoulder part 4, a trunk part 5, and a bottom part 6, which are connected to the neck part 3 and the trunk part 5.
- the bottom portion 6 is a so-called petaloid in which the entire bottom portion is formed thin, and a plurality of valley portions 8 and a plurality of foot portions 9 (preferably 5 to 6 feet) passing through the bottom center portion 7 are formed.
- the bottom shape of the shape ensures the independence and pressure resistance of Pottor 1.
- the crystallinity by the density method is in the range of 20 to 35% at the neck and in the range of 35 to 50% at the trunk. It is an important feature.
- the heat-resistant pressure-resistant polyester pot of the present invention is elongated in a primary blow molding process as will be described later, in the form of an elongated, neck-like neck force ⁇ the force that is formed, similar to the shape of a conventional beer glass bottle. Therefore, the crystallinity of the entire pole, including the neck, is 20% or more, has excellent heat resistance, and increases the crystallinity of the body that has the greatest effect on volume expansion. It increases the strength and makes it difficult to expand.
- the heat and pressure resistant polyester pot of the present invention is characterized in that the moisture absorption rate of the body after storage for 7 days at a temperature of 30 ° C. and a humidity of 80% RH is 300 ppm or less.
- the hygroscopicity of the polyester resin tends to depend on its crystallinity.
- the crystallinity is the lowest, the neck has a crystallinity of 200/0 or more, the contact area force with the content liquid is the largest, and the body is 3 5%
- the hygroscopicity is maintained at 300 ppm or less, and creep deformation becomes difficult. Therefore, even a slender, so-called crane neck-shaped neck can reduce the change in the liquid level (filling) of the liquid in the bottle, and bottles with different periods from molding to filling can be mixed. Even when the moisture absorption rate varies, a stable stitch position can be secured.
- the volume change when filled with a carbonic acid solution prepared to 3.3 GV and then sterilized under conditions of 65 ° C. for 30 minutes is 4.0 ⁇ 1 ⁇ 2 or less. It has the characteristics of being.
- the method for producing a heat-resistant and pressure-resistant polyester bottle of the present invention comprises: a primary blow molding step in which a preform made of a polyester resin is biaxially stretch blow-molded to obtain a primary molded product; and the primary molded product is heat-treated and subjected to heat shrinkage.
- the neck of the primary molded product in the primary blow molding step is The first important feature is that the neck of the secondary molded product is not heat-shrinked in the above-mentioned process, and is biaxially stretched to approximately the same size as the neck of the final molded product.
- the second important characteristic is that the processing amount expressed by the volume ratio of the final molded product in the secondary blow molding process is 20 to 40 V o I%. The processing amount is the following formula
- Processing amount (Volume of final molded product, volume of secondary molded product) Z Volume of final molded product X 1 0 0
- FIG. 2 is a diagram for explaining the shape and size of the primary molded product, the secondary molded product, and the final molded product obtained in each step in the method for producing a heat and pressure resistant polyester bottle of the present invention.
- the neck 3 of the final molded product 1 has a primary molded product 2 2 obtained by the primary blow molding process and a secondary molded product 2 4 obtained by the physical process, and the shape and size thereof. It is almost the same.
- the secondary molded product 24 is shrunk smaller than the primary molded product 22, and the shape of the bottom is almost the same as the shape of the bottom 6 of the final molded product 1.
- the long and narrow neck of a crane neck is not easily biaxially stretched, so heat treatment including the neck causes non-uniform shrinkage and the secondary molded product tends to tilt, and as a result, heat shrinkage of the torso and bottom does not occur. Uniform re, In addition, insertion into the secondary blow mold will also hinder mold closing.
- the method for producing the heat and pressure resistant polyester pottle of the present invention in order to form a crane neck-like long and narrow neck portion, only the portion is molded by only the primary blow molding step without heat shrinkage and secondary blow. As a result, there is no problem in terms of fixing the secondary molded product after heat shrinkage to the secondary blow mold, and productivity is not lowered.
- the pressure resistance is particularly improved, and the amount of addition in the secondary blow molding process is 20 V o I% or more, which is larger than that of a polyester bottle produced by a general two-stage blow method.
- the pressure resistance can be improved by leaving the strain caused by processing and imparting stretchability to the final molded product.
- heat-resistant polyester bottles using the two-stage blow method improve heat resistance by reducing residual strain in the final molded product as a countermeasure against thermal shrinkage during high-temperature filling or heat sterilization after filling. Yes. From this point of view, the secondary molded product after heat treatment is approximated to the shape of the final molded product as much as possible to reduce the amount of processing in the secondary blow molding process.
- the heat and pressure resistant polyester pot of the present invention during the sterilization treatment after filling, in order to deal with a phenomenon completely different from the heat resistant use, in which the internal pressure exerts a force in the expansion direction, By making the amount of processing larger than that of the general heat resistant polyester bottle by the above-mentioned two-stage blow molding method and applying a relatively large strain to the resulting bottle, it is possible to expand and contract by heat, and pressure resistance It becomes possible to raise.
- Fig. 1 is a view showing an example of the heat and pressure resistant polyester pot of the present invention.
- a cross-sectional side view of the heel (excluding the mouth) is a side view, and
- C) is a bottom view. .
- FIG. 2 is a diagram for explaining the shape and size of an intermediate obtained in each step of the method for producing a heat and pressure resistant polyester bottle of the present invention.
- FIG. 3 is a view for explaining the heat and pressure resistant polyester pot manufacturing process of the present invention.
- FIG. 4 is a diagram showing the degree of crystallinity in each pot portion of the polyester pot prepared according to the example. BEST MODE FOR CARRYING OUT THE INVENTION
- thermoplastic polyester used in the heat-resistant and pressure-resistant polyester pot of the present invention it is particularly possible to use ethylene terephthalate-based thermoplastic polyester suitably.
- the ethylene terephthalate-based thermoplastic polyester used in the present invention occupies most of the ester repeating units, generally 70 mol% or more, particularly 80 mol% or more of ethylene terephthalate units, and has a glass transition point (T g).
- Homopolyethylene terephthalate is preferred from the standpoint of heat and pressure resistance, but copolyesters containing a small amount of ester units other than ethylene terephthalate units can also be used.
- Dibasic acids other than terephthalic acid include: aromatic dicarboxylic acids such as isophthalic acid, phthalic acid and naphthalenedicarboxylic acid; alicyclic dicarboxylic acids such as cyclohexanedicarboxylic acid; succinic acid, adipic acid and sebacic acid 1 or a combination of two or more of aliphatic dicarboxylic acids such as dodecanedioic acid, and diol components other than ethylene glycol include propylene glycol, 1,4 monobutanediol, diethylene glycol, 1, 6 —Hexylene glycol, cyclohexane hexanemethanol, or one or more of bisphenol A ethylene oxide adducts.
- aromatic dicarboxylic acids such as isophthalic acid, phthalic acid and naphthalenedicarboxylic acid
- alicyclic dicarboxylic acids such as cyclohexanedicarboxylic
- the ethylene terephthalate-based thermoplastic polyester to be used should have at least a molecular weight sufficient to form a film, and an injection grade or extrusion grade is used depending on the application. Its intrinsic viscosity (I.V.) is generally in the range of 0.6 to 1.4 dLZ g, in particular 0.6 3 to 1.3 d LZ g.
- a multilayer structure preform in addition to the above-described single-layer bottle made of a polyester resin single-layer structure, a multilayer structure preform can also be used in combination with other thermoplastic resins. .
- thermoplastic resin other than the above-described polyester resin any resin that can be stretch blow molded and thermally crystallized can be used, and is not limited to this, but is not limited to polyethylene, polypropylene, ethylene-propylene copolymer, ethylene.
- Monovinyl alcohol copolymer, cyclic Examples include olefin-based resins such as olefin polymers and polyamide resins such as xylylene group-containing polyamides.
- oxygen-absorbing gas parliar resin composition in which xylylene group-containing polyamide is blended with a gen-based compound and a transition metal catalyst, recycled polyester (PCR (resin that recycles used bottles)), and SCR (generated in production plants) Or a mixture thereof) can also be used.
- an example of the preform used in the present invention includes a mouth portion 11, a trunk portion 12, and a closed bottom portion 13.
- a lid fastening mechanism such as a ring-shaped projection or a screw is provided in accordance with the structure of the lid to be used, such as a cap or a crown.
- This mouth part 11 becomes the container mouth part 2 in FIG. 1, and the upper part of the preform body part 12 becomes the neck part, the middle part and the lower part of the final molded product.
- the polyester resin can be molded into a preform by a conventionally known method, and can be formed by injection molding or compression molding.
- the mouth portion 11 of the preform 10 is desirably thermally crystallized, and can be performed by selectively heating these portions by means known per se.
- ⁇ Crystal crystallization of polyesters, etc. occurs remarkably at the intrinsic crystallization temperature, so generally the corresponding part of the preform should be heated to the crystallization temperature.
- Heating can be performed by infrared heating or dielectric heating. In general, it is preferable to perform selective heating by blocking the body to be stretched from a heat source with a heat insulating material.
- the thermal crystallization may be performed simultaneously with the preheating of the preform 10 to the stretching temperature or may be performed separately.
- Thermal crystallization of the mouth is generally performed at a temperature of 1400 to 220 ° C, particularly 1600 to 210 ° C, with the preform mouth thermally insulated from the other parts. This can be done.
- the crystallinity of the preform mouth should be at least 25 o / o.
- the heat and pressure resistant polyester pot of the present invention can be reformed by a two-stage blow molding method.
- a preform first heated to a stretching temperature is subjected to primary blow molding, and the bottom is generally dome-shaped. Create the primary molded product.
- remove the mouth and neck of the primary molded product is subjected to secondary blow molding to obtain a final molded product.
- the shoulder, body and bottom are heated and shrunk to form a secondary molded product, and the secondary molded product in a heated state is subjected to secondary blow molding to obtain a final molded product.
- the preform 10 that has been partially thermally crystallized as necessary is preheated by a heating mechanism; the preform 10 that has been preheated is placed in the primary blow mold 21.
- the neck of the crane neck is stretched to almost the same shape as the final molded product (Fig. 3 (A)).
- a difference of about ⁇ 50/0 from the neck of the final molded product is allowed.
- a portion excluding the mouth and neck of the primary molded product 22 is heated by the heating mechanism 23 to obtain a secondary molded product 24 having the bottom and the body contracted (FIG. 3 (B)).
- This secondary molded article 24 is blow-molded in a secondary blow mold 25, and is composed of a plurality of valleys and feet, and has a bottom that is thinned by high stretching except for the bottom center. Let it be a molded product 1 (Fig. 3 (C)).
- the preform stretching temperature is 85 to 1 35 ° C, particularly 90 to 130 ° C.
- the heating is performed by infrared heating, hot-air heating furnace, dielectric heating, etc. itself. This can be done by known means.
- a method of performing stretch molding after preform molding using heat applied to the preform molded product to be molded, that is, residual heat can be used.
- a method in which a preform formed in a cooled state is once manufactured, and the preform is heated to the aforementioned stretching temperature and stretch blow molding is performed is preferable.
- the temperature of the minute mold 21a is preferably set in the range of 15 to 60 ° C, particularly 15 to 40 ° C. It is also preferable to set the temperature of the die 21 b corresponding to the portion excluding the neck to 60 to 150 ° C. Thereby, it becomes possible to suppress deformation of the shape of the neck in the subsequent heat treatment step and the secondary blow molding step.
- a stretch rod is inserted into the preform and its tip is The preform is pressed against the center of the ohm bottom, and the preform is pulled and stretched in the axial direction, and a fluid is blown into the preform to expand and stretch the preform in the circumferential direction.
- a press rod is arranged on the bottom side coaxially with the extension rod, and when the bow I is stretched, the center of the bottom of the preform is sandwiched between the extension rod and the press rod. The position may be regulated so that the center of the bottom of the reform is positioned at the center of the primary molded product.
- the bottom of the mold has a generally domed shape with a large radius of curvature in order to promote higher stretch at the bottom of the primary molded product, but it is flat at the bottom center as shown in Fig. 3. It is preferable that the shape portion is formed.
- the diameter of the bottom of the primary molded product is preferably about 1.1 to 1.5 times the diameter of the barrel and the bottom of the final container.
- the bottom portion of the obtained primary molded product is oriented and crystallized in a relatively high stretched state with a crystallinity of 20% or more, more preferably 240/0 or more, excluding the bottom center portion. And is thinned to a thickness of 1 mm or less, more preferably 0.8 mm or less.
- the draw ratio in the primary blow molding process is 2 to 5 times in the axial direction, especially 2.2 to 4 times, and the draw ratio in the circumferential direction is 2.5 to 6.6 times, especially 3 to 6 times. Is good.
- the pressure fluid room temperature or heated air and other gases such as nitrogen, carbon dioxide or water vapor can be used, and the pressure is usually 10 to 40 kg / cm 2 gauge, In particular, it should be in the range of 15 to 30 kg Z cm 2 gauge.
- the primary molded product In the heat treatment process, the primary molded product is placed so as to face the infrared heating body with partial force excluding the neck, and the portion other than the neck is heated by infrared rays from the infrared heating body and contracts in the height direction and radial direction.
- the secondary molded product has a shape that fits in the secondary blow mold that is the final molded product shape. In order to prevent heat shrinkage of the neck more reliably, as shown in FIG. At this time, in the present invention, as described above, it is important to heat shrink the primary molded product so as to be larger than the shrinkage amount in the conventionally known two-stage blow molding method.
- the processing amount to be expressed is in the range of 20 to 40 0 vo 1%. This makes it possible to improve the pressure resistance ⁇ . If the processing amount exceeds this range, molding defects such as overstretching whitening and rupture tend to occur.
- the shape of the bottom of the secondary molded product should be as close as possible to the bottom valley of the secondary blow mold. As a result, it is possible to easily mold the foot portion of the final molded product. In that case, it has already been pointed out that the bottom shape of the secondary molded product is important.
- the heating temperature is preferably set to 1 20 to 2 10 ° C. in the body portion, and the obtained secondary molded product shrinks and is thermally fixed, and crystallization proceeds. It is preferable that the bottom is heated to the same temperature as that of the body. At this time, since the bottom of the primary molded product is in a relatively high stretched state, whitening hardly occurs by heating. It is preferable to use a combination of infrared radiators having a planar surface heated to about 400 to 100 ° C. and having relatively high radiation efficiency and a relatively large surface area.
- the infrared heating element is obtained by burning a solid surface such as a metal surface such as carbon steel or stainless steel, a ceramic surface such as alumina, magnesium or zirconia, or a composite material surface such as ceramic and carbon, or a gas.
- a gas surface can be used.
- the surface of the infrared heating element made of solid is set to a predetermined temperature by heating with an embedded electric heater or high frequency induction heating.
- the part of the secondary molded product is shaped into the shape of the final molded product, excluding the mouth.
- fluid is blown into the secondary molded product, secondary blow molding is performed, and the bottom shape (preferably 5 to 6 feet) of the final molded product having predetermined valleys and feet as shown in FIG. Form.
- the modulus of elasticity increases due to crystallization by heat treatment, so it is better to use high fluid pressure.
- pressure fluid 15 to 45 kg Z cm 2 is used. I like it. Since the neck has already been shaped to the shape of the final product, it is hardly stretched.
- the bottom portion has a so-called betaloid shape having a predetermined valley portion and a foot portion, but it is of course limited to this.
- the center of the bottom squeezes inward and its peripheral force ⁇ the so-called champagne type that forms a ground plane
- the temperature of the secondary blow mold can be set to 15 to 60 ° C.
- the final molded product thus obtained is thinned in a highly stretched state including the neck and bottom and is heat-set, and has excellent heat and pressure resistance.
- the crystallinity was calculated from the density measured by the density gradient tube method according to the following equation.
- Example 3 the measurement was performed by peeling off the outer polyethylene terephthalate layer.
- Example 3 and Comparative Example 1 were also evaluated under the condition of 65 ° C for 30 minutes.
- Volume change (Volume after treatment-Volume before filling) Volume after Z treatment X 1 00
- Inset line (content liquid level) The change in height was expressed as the difference between the value immediately after filling and the value after processing.
- the bottle after storage for 7 days at 30 ° C 80 o / o R H and the bottle after storage for 7 days at 40 ° C 90% R H were filled and sterilized according to the procedure described above.
- Homopolyethylene terephthalate (inherent viscosity 0.78 d L / g) was used as the raw material) ⁇ , and a 33 g preform with a mouth shape that was screwed into the screw cap was molded by an injection molding machine.
- This preform was heated to 110 ° C. and subjected to primary blow molding at a neck mold temperature of 25 ° C. and a barrel mold temperature of 120 ° C. to obtain a primary molded product having a barrel diameter of 72 mm.
- This primary molded product is heated to a body temperature of 170 ° C and heat-shrinked to form a secondary molded product, and then immediately subjected to secondary blow molding at a mold temperature of 25 ° C.
- Bottle height excluding mouth 21 mm, neck length 44 mm, barrel diameter 65 mm, full capacity 530 ml, barrel thickness 0.3 mm, bottom thickness from bottom center to valley 15 mm A 0.8mm pottle was molded at the position. The processing amount was 23%.
- Copolymerized polyethylene terephthalate containing 3 mol% of isophthalic acid component is used for inner and outer layers (solid viscosity 0 ⁇ 80d L / -g), and oxygen absorbing resin based on polyamide resin is used for intermediate layer Except that 5% by weight was used to form a multilayer preform with a co-injection molding machine, a pottle having the same shape was molded in the same manner as in Example 1. The processing amount was 23%.
- Example 2 Using the same homopolyethylene terephthalate as in Example 1 as a raw material, a 35 g preform was injection-molded, preform heating temperature 1 10 ° C, mold temperature 1 20 ° In C, a bottle having the same appearance as in Example 1 was molded. However, the bottom wall thickness distribution was adjusted so that the bottom wall thickness was 2. Omm at 15 mm from the bottom center to the valley.
- Table 1 shows the results of filling and sterilizing at 65 ° C for 24 minutes. Under all conditions, the moisture absorption rate was 3000 ppm or less, the volume change was 3.0% or less, and the liquid level change was 2 Omm or less. Furthermore, even in a state where moisture has been absorbed to near equilibrium (approximately 6 OO0 ⁇ 100 ppm) under a moisture absorption condition of 40 ° C 90% RH for 7 days, the volume change can be suppressed to about 3.5%, and the liquid level change can also be achieved in Example 2. , 3 slightly exceeded 2 Omm.
- Table 2 shows the results of filling and sterilizing the bottles stored at 30 ° C. and 80% RH for 7 days in Example 3 and Comparative Example 1 at 65 ° C. for 30 minutes.
- Example 3 even under such severe filling sterilization conditions, the volume change was 4.0% or less, the liquid level change was 21 mm or less, and it was confirmed that it had sufficient heat and pressure resistance.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Ceramic Engineering (AREA)
- Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
- Containers Having Bodies Formed In One Piece (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
- Laminated Bodies (AREA)
Abstract
Description
Claims
Priority Applications (7)
Application Number | Priority Date | Filing Date | Title |
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CN200780100061.3A CN101808801B (zh) | 2007-06-26 | 2007-06-26 | 耐热压性聚酯瓶及其生产方法 |
KR1020107001717A KR101308299B1 (ko) | 2007-06-26 | 2007-06-26 | 내열압성 폴리에스테르 병 및 그 제조 방법 |
PCT/JP2007/063196 WO2009001475A1 (ja) | 2007-06-26 | 2007-06-26 | 耐熱圧性ポリエステルボトル及びその製造方法 |
AT07767976T ATE535362T1 (de) | 2007-06-26 | 2007-06-26 | Polyesterflasche mit wärme- und druckbeständigkeit und herstellungsverfahren dafür |
JP2009520272A JP5018881B2 (ja) | 2007-06-26 | 2007-06-26 | 耐熱圧性ポリエステルボトル及びその製造方法 |
US12/666,755 US8815354B2 (en) | 2007-06-26 | 2007-06-26 | Heat- and pressure-resistant polyester bottle and process for producing the same |
EP07767976A EP2163371B1 (en) | 2007-06-26 | 2007-06-26 | Polyester bottle with resistance to heat and pressure and process for producing the same |
Applications Claiming Priority (1)
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PCT/JP2007/063196 WO2009001475A1 (ja) | 2007-06-26 | 2007-06-26 | 耐熱圧性ポリエステルボトル及びその製造方法 |
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PCT/JP2007/063196 WO2009001475A1 (ja) | 2007-06-26 | 2007-06-26 | 耐熱圧性ポリエステルボトル及びその製造方法 |
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US (1) | US8815354B2 (ja) |
EP (1) | EP2163371B1 (ja) |
JP (1) | JP5018881B2 (ja) |
KR (1) | KR101308299B1 (ja) |
CN (1) | CN101808801B (ja) |
AT (1) | ATE535362T1 (ja) |
WO (1) | WO2009001475A1 (ja) |
Cited By (5)
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JP2012162287A (ja) * | 2011-02-04 | 2012-08-30 | Dainippon Printing Co Ltd | プラスチックボトル |
JP2012162290A (ja) * | 2011-02-04 | 2012-08-30 | Dainippon Printing Co Ltd | プラスチックボトル |
JP2014512286A (ja) * | 2011-03-29 | 2014-05-22 | アムコー リミテッド | 容器の形成方法 |
JP2017019248A (ja) * | 2015-07-14 | 2017-01-26 | 株式会社吉野工業所 | 容器の製造方法 |
JP2021116112A (ja) * | 2020-01-28 | 2021-08-10 | 大日本印刷株式会社 | ポリエステル容器およびポリエステルプリフォーム |
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US8550272B2 (en) * | 2010-07-14 | 2013-10-08 | Graham Packaging Company, Lp | Extrusion blow molded pet container having superior column strength |
CN103619906B (zh) * | 2011-06-17 | 2015-08-19 | 碧欧撤曼特克斯有限公司 | 木质素转化方法 |
JP5848433B2 (ja) | 2012-02-23 | 2016-01-27 | 日精エー・エス・ビー機械株式会社 | ブロー成形方法及びブロー成形型 |
US9758294B2 (en) * | 2013-01-25 | 2017-09-12 | The Procter & Gamble Company | Components for aerosol dispenser and aerosol dispenser made therewith |
JP6743360B2 (ja) * | 2015-09-30 | 2020-08-19 | 大日本印刷株式会社 | プラスチックボトル、充填体、及び充填体の製造方法 |
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- 2007-06-26 CN CN200780100061.3A patent/CN101808801B/zh not_active Expired - Fee Related
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Also Published As
Publication number | Publication date |
---|---|
CN101808801B (zh) | 2013-06-19 |
JPWO2009001475A1 (ja) | 2010-08-26 |
EP2163371A1 (en) | 2010-03-17 |
CN101808801A (zh) | 2010-08-18 |
EP2163371B1 (en) | 2011-11-30 |
KR101308299B1 (ko) | 2013-09-17 |
ATE535362T1 (de) | 2011-12-15 |
EP2163371A4 (en) | 2010-09-15 |
JP5018881B2 (ja) | 2012-09-05 |
US20100200531A1 (en) | 2010-08-12 |
US8815354B2 (en) | 2014-08-26 |
KR20100050484A (ko) | 2010-05-13 |
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