WO2022074885A1 - Preform, and synthetic resin container and method for manufacturing same - Google Patents

Preform, and synthetic resin container and method for manufacturing same Download PDF

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Publication number
WO2022074885A1
WO2022074885A1 PCT/JP2021/025425 JP2021025425W WO2022074885A1 WO 2022074885 A1 WO2022074885 A1 WO 2022074885A1 JP 2021025425 W JP2021025425 W JP 2021025425W WO 2022074885 A1 WO2022074885 A1 WO 2022074885A1
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WO
WIPO (PCT)
Prior art keywords
container
preform
coating layer
synthetic resin
partially
Prior art date
Application number
PCT/JP2021/025425
Other languages
French (fr)
Japanese (ja)
Inventor
弘光 清都
祐一 宮崎
洋一 田所
温 小宮
Original Assignee
東洋製罐株式会社
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Publication date
Application filed by 東洋製罐株式会社 filed Critical 東洋製罐株式会社
Publication of WO2022074885A1 publication Critical patent/WO2022074885A1/en

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    • 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
    • B29C49/02—Combined blow-moulding and manufacture of the preform or the parison
    • B29C49/06—Injection blow-moulding
    • 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
    • B29C49/22—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor using multilayered preforms or parisons
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D1/00—Rigid or semi-rigid containers having bodies formed in one piece, e.g. by casting metallic material, by moulding plastics, by blowing vitreous material, by throwing ceramic material, by moulding pulped fibrous material or by deep-drawing operations performed on sheet material
    • B65D1/02—Bottles or similar containers with necks or like restricted apertures, designed for pouring contents
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • 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
    • B29C49/02—Combined blow-moulding and manufacture of the preform or the parison
    • B29C2049/023—Combined blow-moulding and manufacture of the preform or the parison using inherent heat of the preform, i.e. 1 step blow moulding

Definitions

  • the present invention relates to a preform, a container made of synthetic resin, and a method for manufacturing the same.
  • the preform in which a coating material layer is laminated on the outer peripheral surface side of the preform body, and a coating layer on the outer peripheral surface side of the container body.
  • the present invention relates to a synthetic resin container in which is laminated and a method for manufacturing the same.
  • a container made of synthetic resin in which a bottomed tubular preform is formed using a thermoplastic resin such as polyethylene terephthalate, and then this preform is molded into a bottle shape by biaxial stretch blow molding or the like, is used. It is used in a wide range of fields as a container containing various beverages and various seasonings.
  • This type of container is filled and sealed with its contents, and is usually put on the market with a label printed with its product name, contents display, and decorative design.
  • a label a shrink label attached by heat shrinkage, a seal label attached by an adhesive, and the like are known (see, for example, Patent Document 1).
  • the present inventors have completed the present invention as a result of repeated studies in order to provide a container made of synthetic resin having design features, which is not found in the container with the conventional label.
  • the preform according to the present invention is a preform for manufacturing a synthetic resin container by blow molding, and is laminated on a bottomed cylindrical preform main body having an opening on one end side and an outer peripheral surface side of the preform main body.
  • the covering material layer is provided with at least one of a thick portion having a partially thickened portion, a thin portion having a partially thinned portion, and a partially defective portion. It is a configuration that includes one.
  • the method for manufacturing a synthetic resin container according to the present invention is a method for manufacturing a synthetic resin container including a container body formed into a predetermined container shape and a coating layer laminated on the outer peripheral surface side of the container body.
  • the preform is blow-molded, and the thickness distribution of the coating material layer by at least one of the thick portion, the thin portion, or the defect portion is changed to the thickness distribution of the coating layer. There is a way to reflect it.
  • the synthetic resin container according to the present invention is a synthetic resin container provided with a container body formed into a predetermined container shape and a coating layer laminated on the outer peripheral surface side of the container body, and the coating is provided.
  • the layer is configured to include at least one of a partially thickened portion, a partially thinned portion, and a partially defective portion.
  • FIG. 1 is an end view taken along the line AA of FIG. It is explanatory drawing which shows the outline of the synthetic resin container which concerns on 1st Embodiment of this invention. It is explanatory drawing which shows the outline of the molding process of the preform which concerns on 1st Embodiment of this invention. It is explanatory drawing which shows the end face corresponding to AA end face of FIG. 1 about the modification of the preform which concerns on 1st Embodiment of this invention. It is explanatory drawing which shows the outline of the preform which concerns on 2nd Embodiment of this invention.
  • FIG. 1 is an explanatory view showing an outline of a preform according to the present embodiment
  • FIG. 2 is an end view taken along the line AA of FIG.
  • the preform 1 shown in these figures is for manufacturing a container 10 described later by blow molding, in which a mouth portion 2 is formed on one end side of a cylindrical body portion 4 and a hemispherical shape is formed on the other end side. It includes a bottomed tubular preform main body 1a having a bottom portion 5 formed and one end open, and a covering material layer 6 laminated on the outer peripheral surface side of the preform main body 1a.
  • FIG. 1 shows a vertical cross section of the preform 1 in which a part of the upper end side of the body 4 is cut out from the mouth 2 of the preform 1 when viewed from the front, and the preform main body 1a appearing in the cross section is covered.
  • the wall thickness of the material layer 6 is exaggerated and schematically depicted.
  • the wall thicknesses of the preform main body 1a and the covering material layer 6 appearing in the cross section are exaggerated and schematically depicted.
  • the mouth portion 2 of the preform 1 is a portion that becomes the mouth portion 20 of the container 10 as it is without being stretched by blow molding, and a screw thread 2a for attaching a cap (not shown) is provided on the outer peripheral surface of the mouth portion 2. It is provided. Further, a neck ring 2b is provided on the lower end side of the mouth portion 2 so as to project in an annular shape along the circumferential direction.
  • the preform 1 is softened by heating so that it can be blow-molded, and then set in a blow-molding mold (not shown), and the portion from directly under the neck ring 2b to the bottom 5 is stretched as necessary. While being stretched in the axial direction (longitudinal direction) by the rod, it is stretched in the axial direction and the circumferential direction (horizontal direction) by the high-pressure fluid blow. Then, the cavity shape of the blow molding mold is transferred to the stretched portion, so that the container 10 has a predetermined container shape. At this time, the container body 10a is formed by the stretched preform body 1a, and the dressing layer 6 laminated on the preform body 1a is integrally molded with the preform body 1a and laminated on the container body 10a. It is molded so as to be the coated coating layer 60.
  • the container 10 is a container formed into a predetermined container shape including a mouth portion 20, a shoulder portion 30, a body portion 40, and a bottom portion 50.
  • the main body 10a and the covering layer 60 laminated on the outer peripheral surface side of the container main body 10a are provided.
  • FIG. 3 shows a cross section of the container 10 in which a part of the upper end side of the shoulder portion 30 is cut out from the mouth portion 20 of the container 10 viewed from the front, and the container body 10a and the covering layer 60 appearing in the cross section.
  • the wall thickness is exaggerated and depicted schematically.
  • the lower end of the mouth portion 20 is connected to the shoulder portion 30 whose diameter increases toward the body portion 40.
  • the body portion 40 is a portion that occupies most of the height direction of the container 10, and the bottom portion 50 is connected to the lower end thereof.
  • the bottom portion 50 includes a ground contact portion 50a that comes into contact with the ground contact surface when the container 10 is upright, and the peripheral surface 50b of the bottom portion 50 is connected to the lower end of the body portion 40 while expanding the diameter from the ground contact portion 50a. ..
  • the height direction means a direction orthogonal to the horizontal plane when the container 10 is upright on the horizontal plane with the mouth portion 20 facing up, and the container 10 is in this state (the state shown in FIG. 3).
  • the vertical and horizontal directions and the vertical and horizontal directions of are specified. The same applies to the vertical and horizontal directions and the vertical and horizontal directions of the preform 1.
  • any blow-moldable thermoplastic resin can be used, but in consideration of recyclability, polyethylene terephthalate-based thermoplastics such as polyethylene terephthalate can be used. Polyester is preferred.
  • the resin material for forming the coating material layer 6 (coating layer 60), from the viewpoint of facilitating the work of peeling off the coating layer 60 and separating it from the container body 10a when the used container 10 is discarded. It is preferable to use a thermoplastic resin that is incompatible with the resin material that forms the reform body 1a.
  • the resin material forming the covering material layer 6 is, for example, a polyolefin-based resin such as polyethylene or polypropylene, or an ethylene-vinyl alcohol co-weight.
  • a polyamide-based resin such as a combination or a polymethoxylylene adipamide (MXD6) can be used.
  • additives such as pigments and colorants are added to the resin material forming the coating material layer 6 as necessary without being limited by the recyclability required for the container body 10a. Can be done.
  • the preform 1 in which the covering material layer 6 is laminated on the outer peripheral surface side of the preform main body 1a is molded as follows by, for example, an injection molding method called two-color molding or double molding. can do.
  • a core mold 100 that forms the inner peripheral surface of the preform main body 1a and the upper end surface of the mouth portion 2 thereof, and a mouth portion type 101 that forms the outer peripheral surface of the mouth portion 2 including the upper surface and the peripheral end surface of the neck ring 2b.
  • the first body mold 102 that forms the outer peripheral surface of the preform main body 1a from the lower surface to the bottom 5 of the neck ring 2b is molded, and the preform main body 1a is injection-molded (FIG. 4A). reference).
  • a second body type 103 configured to form a gap for forming the covering material layer 6 with the molded preform main body 1a is used.
  • the covering material layer 6 is formed on the outer peripheral surface side of the preform main body 1a.
  • the laminated preform 1 can be molded.
  • the first and second body types 102 and 103 are usually provided with a gate serving as an injection port for the resin material on the bottom 5 side of the preform 1, but in the example shown in FIG. 4, the gate is arranged.
  • the illustration of the gate is omitted.
  • the first and second body molds 102 and 103 are provided with a split mold structure that opens in a direction orthogonal to the axial direction, if necessary, so as not to hinder the mold opening. Needless to say, it can be.
  • the covering material layer 6 covers the entire surface from the bottom portion 5 to directly below the mouth portion 2, and the end side thereof is a neck ring provided on the lower end side of the mouth portion 2. It is preferable that the preform main body 1a is laminated on the outer peripheral surface side so as to reach the peripheral edge of the neck ring 2b while covering the lower surface of the 2b.
  • the container 10 is provided with the terminal side of the covering material layer 6 covering the lower surface of the neck ring 2b as it is. It is on the terminal side of the coating layer 60. Therefore, when the used container 10 is discarded, the end side of the coating layer 60 is separated from the neck ring 2b by hanging a finger on the end of the coating layer 60 reaching the peripheral edge of the neck ring 2b. By picking the separated end side with a finger and peeling the coating layer 60 from the container body 10a, the container body 10a and the coating layer 60 can be easily separated.
  • such an embodiment is particularly preferable when it is required to color the coating layer 60 to impart light-shielding property in order to suppress deterioration of the contents due to light.
  • the covering material layer 6 laminated on the outer peripheral surface side of the preform main body 1a is molded so as to include the thick portion 6a which is partially thickened, and is shown in FIGS. 1 and 2.
  • eight thick portions 6a extending along the axial direction are arranged in a vertical stripe pattern.
  • the covering material layer 6 is integrally molded with the preform main body 1a to become the covering layer 60.
  • the wall thickness distribution of the material layer 6 is reflected in the wall thickness distribution of the covering layer 60.
  • the thick portion 60a derived from the thick portion 6a of the covering material layer 6 is formed in the covering layer 60.
  • eight thick portions 60a derived from the thick portion 6a of the covering material layer 6 are arranged in a vertical stripe shape on the coating layer 60 included in the container 10. It forms a striped pattern.
  • the covering material layer 6 is formed with a thick portion 6a so as to project toward the surface side of the covering material layer 6, but the covering material layer is formed.
  • the thickness distribution of 6 is not limited to this as long as it can be reflected in the wall thickness distribution of the coating layer 60 included in the blow-molded container 10.
  • a recess may be provided in the preform main body 1a, and the recess may be filled with a resin material forming the covering material layer 6 to form a thick portion 60a. ..
  • FIG. 6 is an explanatory view showing an outline of the preform according to the present embodiment, and the right half of the preform 1 viewed from the front is cut out to show a vertical cross section thereof, but the preform appearing in the cross section is shown.
  • the wall thickness of the main body 1a and the covering material layer 6 is exaggerated and schematically depicted.
  • the preform 1 has a mouth portion 2 formed on one end side of a cylindrical body portion 4 and a hemispherical bottom portion 5 formed on the other end side, and one end thereof is open. It includes a bottomed tubular preform main body 1a and a covering material layer 6 laminated on the outer peripheral surface side of the preform main body 1a.
  • FIG. 7 shows an example of a container 10 obtained by blow-molding the preform 1 shown in FIG. 6, and the right half of the container 10 in the front view is cut out to show a vertical cross section thereof.
  • the wall thickness of the container body 10a and the coating layer 60 appearing in the cross section is exaggerated and schematically depicted.
  • the container 10 has a container body 10a formed into a predetermined container shape including a mouth portion 20, a shoulder portion 30, a body portion 40, and a bottom portion 50, and an outer peripheral surface of the container body 10a. It is provided with a coating layer 60 laminated on the side.
  • the covering material layer 6 laminated on the outer peripheral surface side of the preform main body 1a is formed so as to include the thick portion 6a which is partially thickened.
  • two thick portions 6a extending along the circumferential direction are arranged on the upper end side and the lower end side of the body portion 4, respectively.
  • the shoulder portion 30 is provided in the coating layer 60 included in the blow molded container 10.
  • the thick portion 60a is set to be arranged in an annular shape at a portion along the connection portion between the body portion 40 and the body portion 40 and a portion along the peripheral surface 50b of the bottom portion 50.
  • a portion along the joint portion between the shoulder portion 30 and the body portion 40 and the bottom portion 50 during transportation or when discharged from the vending machine are used.
  • the portion along the peripheral surface 50b is easily damaged, and the coating layer 60 may be damaged.
  • the thick portion 60a by disposing the thick portion 60a in these portions, the weight increase due to the formation of the entire coating layer 60 in the thick thickness is avoided, and the damage is avoided. It is also possible to selectively improve the strength of the susceptible portion. Further, by disposing the thick portion 60a on the covering layer 60 provided in the container 10, it is possible to impart design features that have not been seen in the past.
  • the thick portion 6a in the covering material layer 6 of the preform 1 is arranged at a portion where the container 10 is easily damaged according to the container shape of the container 10 obtained by blow molding the preform 1.
  • the point that the thick portion 60a is set to be arranged is different from the first embodiment described above, but since the other configurations are the same as those of the first embodiment described above, overlapping description will be omitted.
  • FIG. 8 is an explanatory view showing an outline of the preform according to the present embodiment
  • FIG. 9 is an end view of BB of FIG.
  • FIG. 8 shows a vertical cross section of the preform 1 seen from the front by cutting out a part of the upper end side of the body 4 from the mouth portion 2, but the preform main body 1a appearing in the cross section is covered.
  • the wall thickness of the material layer 6 is exaggerated and schematically depicted.
  • the wall thicknesses of the preform main body 1a and the covering material layer 6 appearing in the cross section are exaggerated and schematically depicted.
  • the preform 1 has a mouth portion 2 formed on one end side of a cylindrical body portion 4 and a hemispherical bottom portion 5 formed on the other end side, and one end thereof is open. It includes a bottomed tubular preform main body 1a and a covering material layer 6 laminated on the outer peripheral surface side of the preform main body 1a.
  • FIG. 10 shows an example of a container 10 obtained by blow-molding the preform 1 shown in FIGS. 8 and 9, and is a part of the upper end side of the shoulder portion 30 from the mouth portion 20 of the container 10 viewed from the front. Is cut out to show the cross section, but the thickness of the container body 10a and the coating layer 60 appearing in the cross section is exaggerated and schematically depicted.
  • the container 10 has a container body 10a formed into a predetermined container shape including a mouth portion 20, a shoulder portion 30, a body portion 40, and a bottom portion 50, and an outer peripheral surface of the container body 10a. It is provided with a coating layer 60 laminated on the side.
  • the dressing layer 6 laminated on the outer peripheral surface side of the preform main body 1a is molded so as to include the defective portion 6b in which the dressing layer 6 is partially defective, and is shown in FIGS. 8 and 9.
  • the defect portion 6b extending narrowly along the axial direction is arranged in a range extending from the upper end side to the bottom portion 5 side of the body portion 4.
  • the figure is shown in the container 10 blow-molded using the preform 1 provided with such a covering material layer 6, when the covering material layer 6 is integrally molded with the preform main body 1a to become the covering layer 60, the figure is shown. As shown in 10, the defect portion 60b derived from the defect portion 6b of the coating material layer 6 is formed in the coating layer 60.
  • the defective portion 60b is narrowly arranged in the covering layer 60 included in the container 10 in the range from the upper end side of the shoulder portion 30 to the bottom portion 50.
  • the coating layer 60 provided in the container 10 is formed with a defective portion 60b in which the coating layer 60 is partially defective, so that deterioration of the contents due to light is suppressed. Even when the 60 is colored to impart a light-shielding property, the liquid level of the content liquid in the container 10 can be visually recognized through the defective portion 60b. Further, by disposing the defective portion 60b on the covering layer 60 provided in the container 10, it is possible to impart design features that have not been seen in the past.
  • the covering material layer 6 is laminated on the outer peripheral surface side of the preform main body 1a so as to include the partially defective defective portion 6b, and the defective portion 60b derived from the defective portion 6b is the preform 1. It is different from the above-mentioned first embodiment in that it is formed into the coating layer 60 provided in the container 10 which is blow-molded. The explanation to be given is omitted.
  • a striped pattern formed by arranging thick portions 60a in a vertical stripe pattern on the coating layer 60 provided in the container 10 is shown, but it is formed on the coating layer 60.
  • the pattern is not limited to this. It may be a pattern consisting of figures, characters, various decorative patterns, combinations thereof, and the like. Further, the pattern formed on the coating layer 60 is not limited to the thick portion 60a that is partially thickened, and the coating layer 60 is partially deleted as shown in the above-mentioned third embodiment. It may be a defective portion 60b that has been made to be formed, or may be a thin portion in which the coating layer 60 is partially thinned, although not particularly shown.
  • a pattern formed by at least one of these or a combination thereof can be formed on the coating layer 60 provided in the container 10.
  • the covering layer 60 included in the container 10 has both a portion along the connecting portion between the shoulder portion 30 and the body portion 40 and a portion along the peripheral surface 50b of the bottom portion 50.
  • the thick portion 60a is arranged, but the present invention is not limited to this. If necessary, it may be either a portion along the joint portion between the shoulder portion 30 and the body portion 40 or a portion along the peripheral surface 50b of the bottom portion 50, and the container 10 is physically or chemically damaged.
  • the wall thickness distribution of the covering material layer 6 of the preform 1 is appropriately adjusted so that the thick portion 60a is arranged in the portion so that the strength of the susceptible portion can be selectively improved. can do.
  • At least one of the thick-walled portion, the thin-walled portion, or the defective portion, or a combination thereof is used. May be formed on the coating layer 60 provided in the container 10.
  • a container 10 formed into a container shape which is a so-called round bottle, is shown, but the present invention is not limited thereto. It may be a container shape called a so-called square bottle, or it may be a container shape having a bottom 50 which is a so-called petaloid shape. Further, the body portion 40 may be formed into a columnar shape, and the mouth portion 20 may be provided in the central portion on the upper surface side thereof in a container shape.
  • Preform 1a Preform body 6 Coating material layer 6a Thick part 6b Defect part 10 Container 10a Container body 20 Mouth 30 Shoulder 40 Body 50b Peripheral surface (peripheral surface of bottom) 60 Coating layer 60a Thick part 60b Defect part

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

Abstract

Provided is a synthetic resin container having an unconventional design feature that is realized by: blow-molding a preform 1 provided with a bottomed tubular preform body 1a that opens at one end thereof, and a coating material layer 6 including at least one of a thick part 6a laminated on an outer circumferential surface side of the preform body 1a and being partially thick, a thin part being partially thin, and a cut-out part 6b being partially cut out; and reflecting a thickness distribution of the coating material layer 6 on a thickness distribution of a coating layer 60 included in a container 10 having been blow-molded.

Description

プリフォーム、並びに、合成樹脂製容器及びその製造方法Preform, synthetic resin container and its manufacturing method
　本発明は、プリフォーム、並びに、合成樹脂製容器及びその製造方法に関し、特に、プリフォーム本体の外周面側に被覆材層が積層されたプリフォーム、並びに、容器本体の外周面側に被覆層が積層された合成樹脂製容器及びその製造方法に関する。 The present invention relates to a preform, a container made of synthetic resin, and a method for manufacturing the same. In particular, the preform in which a coating material layer is laminated on the outer peripheral surface side of the preform body, and a coating layer on the outer peripheral surface side of the container body. The present invention relates to a synthetic resin container in which is laminated and a method for manufacturing the same.
　従来、ポリエチレンテレフタレートなどの熱可塑性樹脂を用いて有底筒状のプリフォームを形成し、次いで、このプリフォームを二軸延伸ブロー成形などによってボトル状に成形してなる合成樹脂製の容器が、各種飲料品、各種調味料等を内容物とする容器として広い分野で利用されている。 Conventionally, a container made of synthetic resin, in which a bottomed tubular preform is formed using a thermoplastic resin such as polyethylene terephthalate, and then this preform is molded into a bottle shape by biaxial stretch blow molding or the like, is used. It is used in a wide range of fields as a container containing various beverages and various seasonings.
　この種の容器は、内容物を充填密封するとともに、通常は、その商品名や内容物表示、さらには、装飾デザインなどを印刷したラベルが装着されて市場に供される。このようなラベルとしては、熱収縮によって装着されるシュリンクラベル、粘着剤によって装着されるシールラベルなどが知られている（例えば、特許文献１参照）。 This type of container is filled and sealed with its contents, and is usually put on the market with a label printed with its product name, contents display, and decorative design. As such a label, a shrink label attached by heat shrinkage, a seal label attached by an adhesive, and the like are known (see, for example, Patent Document 1).
特開２００７－２３０５７９号公報Japanese Unexamined Patent Publication No. 2007-230579
　ところで、この種の容器の利用が広い分野でより一般的なものとなってきた近年の状況においては、他の商品との差別化を図るべく、デザイン上の特徴を備えたものが望まれるようになってきている。 By the way, in the recent situation where the use of this kind of container has become more common in a wide range of fields, it seems that a container with design features is desired in order to differentiate it from other products. Is becoming.
　そこで、本発明者らは、従来のラベルを装着した容器にはない、デザイン上の特徴を備えた合成樹脂製容器を提供するべく鋭意検討を重ねた結果、本発明を完成するに至った。 Therefore, the present inventors have completed the present invention as a result of repeated studies in order to provide a container made of synthetic resin having design features, which is not found in the container with the conventional label.
　本発明に係るプリフォームは、合成樹脂製容器をブロー成形によって製造するためのプリフォームであって、一端側が開口する有底筒状のプリフォーム本体と、前記プリフォーム本体の外周面側に積層された被覆材層とを備え、前記被覆材層が、部分的に厚肉とされた厚肉部、部分的に薄肉とされた薄肉部、又は部分的に欠損させた欠損部の少なくともいずれか一つを含む構成としてある。 The preform according to the present invention is a preform for manufacturing a synthetic resin container by blow molding, and is laminated on a bottomed cylindrical preform main body having an opening on one end side and an outer peripheral surface side of the preform main body. The covering material layer is provided with at least one of a thick portion having a partially thickened portion, a thin portion having a partially thinned portion, and a partially defective portion. It is a configuration that includes one.
　また、本発明に係る合成樹脂製容器の製造方法は、所定の容器形状に成形された容器本体と、前記容器本体の外周面側に積層された被覆層とを備える合成樹脂製容器の製造方法であって、上記プリフォームをブロー成形し、前記厚肉部、前記薄肉部、又は前記欠損部の少なくともいずれか一つによる前記被覆材層の肉厚分布を、前記被覆層の肉厚分布に反映させる方法としてある。 Further, the method for manufacturing a synthetic resin container according to the present invention is a method for manufacturing a synthetic resin container including a container body formed into a predetermined container shape and a coating layer laminated on the outer peripheral surface side of the container body. The preform is blow-molded, and the thickness distribution of the coating material layer by at least one of the thick portion, the thin portion, or the defect portion is changed to the thickness distribution of the coating layer. There is a way to reflect it.
　また、本発明に係る合成樹脂製容器は、所定の容器形状に成形された容器本体と、前記容器本体の外周面側に積層された被覆層とを備える合成樹脂製容器であって、前記被覆層が、部分的に厚肉とされた厚肉部、部分的に薄肉とされた薄肉部、又は部分的に欠損させた欠損部の少なくともいずれか一つを含む構成としてある。 Further, the synthetic resin container according to the present invention is a synthetic resin container provided with a container body formed into a predetermined container shape and a coating layer laminated on the outer peripheral surface side of the container body, and the coating is provided. The layer is configured to include at least one of a partially thickened portion, a partially thinned portion, and a partially defective portion.
　本発明によれば、従来にはないデザイン上の特徴を備えた合成樹脂製容器を提供することができる。 According to the present invention, it is possible to provide a synthetic resin container having unprecedented design features.
本発明の第一実施形態に係るプリフォームの概略を示す説明図である。It is explanatory drawing which shows the outline of the preform which concerns on 1st Embodiment of this invention. 図１のＡ－Ａ端面図である。FIG. 1 is an end view taken along the line AA of FIG. 本発明の第一実施形態に係る合成樹脂製容器の概略を示す説明図である。It is explanatory drawing which shows the outline of the synthetic resin container which concerns on 1st Embodiment of this invention. 本発明の第一実施形態に係るプリフォームの成形工程の概略を示す説明図である。It is explanatory drawing which shows the outline of the molding process of the preform which concerns on 1st Embodiment of this invention. 本発明の第一実施形態に係るプリフォームの変形例について、図１のＡ－Ａ端面に相当する端面を示す説明図である。It is explanatory drawing which shows the end face corresponding to AA end face of FIG. 1 about the modification of the preform which concerns on 1st Embodiment of this invention. 本発明の第二実施形態に係るプリフォームの概略を示す説明図である。It is explanatory drawing which shows the outline of the preform which concerns on 2nd Embodiment of this invention. 本発明の第二実施形態に係る合成樹脂製容器の概略を示す説明図である。It is explanatory drawing which shows the outline of the synthetic resin container which concerns on 2nd Embodiment of this invention. 本発明の第三実施形態に係るプリフォームの概略を示す説明図である。It is explanatory drawing which shows the outline of the preform which concerns on 3rd Embodiment of this invention. 図８のＢ－Ｂ端面図である。It is a BB end view of FIG. 本発明の第三実施形態に係る合成樹脂製容器の概略を示す説明図である。It is explanatory drawing which shows the outline of the synthetic resin container which concerns on 3rd Embodiment of this invention.
　以下、本発明の好ましい実施形態について、図面を参照しつつ説明する。 Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.
［第一実施形態］
　まず、本発明の第一実施形態について説明する。
　図１は、本実施形態に係るプリフォームの概略を示す説明図であり、図２は、図１のＡ－Ａ端面図である。 [First Embodiment]
First, the first embodiment of the present invention will be described.
FIG. 1 is an explanatory view showing an outline of a preform according to the present embodiment, and FIG. 2 is an end view taken along the line AA of FIG.
　これらの図に示すプリフォーム１は、ブロー成形によって後述する容器１０を製造するためのものであり、円筒状の胴部４の一端側に口部２が形成され、他端側に半球状の底部５が形成された、一端が開口する有底筒状のプリフォーム本体１ａと、プリフォーム本体１ａの外周面側に積層された被覆材層６とを備えている。 The preform 1 shown in these figures is for manufacturing a container 10 described later by blow molding, in which a mouth portion 2 is formed on one end side of a cylindrical body portion 4 and a hemispherical shape is formed on the other end side. It includes a bottomed tubular preform main body 1a having a bottom portion 5 formed and one end open, and a covering material layer 6 laminated on the outer peripheral surface side of the preform main body 1a.
　なお、図１には、正面視したプリフォーム１の口部２から胴部４の上端側の一部を切り欠いて、その縦断面を示しているが、断面にあらわれるプリフォーム本体１ａ、被覆材層６の肉厚を誇張して模式的に描写している。図２においても、断面にあらわれるプリフォーム本体１ａ、被覆材層６の肉厚を誇張して模式的に描写している。 It should be noted that FIG. 1 shows a vertical cross section of the preform 1 in which a part of the upper end side of the body 4 is cut out from the mouth 2 of the preform 1 when viewed from the front, and the preform main body 1a appearing in the cross section is covered. The wall thickness of the material layer 6 is exaggerated and schematically depicted. Also in FIG. 2, the wall thicknesses of the preform main body 1a and the covering material layer 6 appearing in the cross section are exaggerated and schematically depicted.
　プリフォーム１の口部２は、ブロー成形によって延伸されずに、そのまま容器１０の口部２０となる部位であり、口部２の外周面には、図示しないキャップを取り付けるためのネジ山２ａが設けられている。
　また、口部２の下端側には、周方向に沿って環状に張り出すネックリング２ｂが設けられている。 The mouth portion 2 of the preform 1 is a portion that becomes the mouth portion 20 of the container 10 as it is without being stretched by blow molding, and a screw thread 2a for attaching a cap (not shown) is provided on the outer peripheral surface of the mouth portion 2. It is provided.
Further, a neck ring 2b is provided on the lower end side of the mouth portion 2 so as to project in an annular shape along the circumferential direction.
　プリフォーム１は、加熱により軟化させてブロー成形が可能な状態とされてから、図示しないブロー成形型にセットされ、ネックリング２ｂの直下から底部５に至るまでの部位が、必要に応じて延伸ロッドにより軸方向（縦方向）に延伸されつつ、高圧流体ブローにより軸方向及び周方向（横方向）に延伸される。そして、延伸された部位にブロー成形型のキャビティ形状が転写されることによって、所定の容器形状を備える容器１０に成形される。このとき、延伸されたプリフォーム本体１ａによって容器本体１０ａが成形されるとともに、プリフォーム本体１ａに積層された被覆材層６が、プリフォーム本体１ａと一体に成形されて、容器本体１０ａに積層された被覆層６０となるように成形される。 The preform 1 is softened by heating so that it can be blow-molded, and then set in a blow-molding mold (not shown), and the portion from directly under the neck ring 2b to the bottom 5 is stretched as necessary. While being stretched in the axial direction (longitudinal direction) by the rod, it is stretched in the axial direction and the circumferential direction (horizontal direction) by the high-pressure fluid blow. Then, the cavity shape of the blow molding mold is transferred to the stretched portion, so that the container 10 has a predetermined container shape. At this time, the container body 10a is formed by the stretched preform body 1a, and the dressing layer 6 laminated on the preform body 1a is integrally molded with the preform body 1a and laminated on the container body 10a. It is molded so as to be the coated coating layer 60.
　このようにしてブロー成形してなる容器１０の一例を図３に示すに、容器１０は、口部２０、肩部３０、胴部４０、及び底部５０を含む所定の容器形状に成形された容器本体１０ａと、容器本体１０ａの外周面側に積層された被覆層６０とを備えている。 As shown in FIG. 3 as an example of the container 10 blow-molded in this manner, the container 10 is a container formed into a predetermined container shape including a mouth portion 20, a shoulder portion 30, a body portion 40, and a bottom portion 50. The main body 10a and the covering layer 60 laminated on the outer peripheral surface side of the container main body 10a are provided.
　なお、図３には、正面視した容器１０の口部２０から肩部３０の上端側の一部を切り欠いて、その断面を示しているが、断面にあらわれる容器本体１０ａ、被覆層６０の肉厚を誇張して模式的に描写している。 Note that FIG. 3 shows a cross section of the container 10 in which a part of the upper end side of the shoulder portion 30 is cut out from the mouth portion 20 of the container 10 viewed from the front, and the container body 10a and the covering layer 60 appearing in the cross section. The wall thickness is exaggerated and depicted schematically.
　図３に示す容器１０の一例において、口部２０の下端は、胴部４０に向かって拡径する肩部３０に連接している。胴部４０は、容器１０の高さ方向の大半を占める部位であり、その下端に底部５０が連接している。底部５０は、容器１０を正立させたときに、接地面に接する接地部５０ａを含み、底部５０の周面５０ｂは、接地部５０ａから拡径しながら胴部４０の下端に連接している。 In an example of the container 10 shown in FIG. 3, the lower end of the mouth portion 20 is connected to the shoulder portion 30 whose diameter increases toward the body portion 40. The body portion 40 is a portion that occupies most of the height direction of the container 10, and the bottom portion 50 is connected to the lower end thereof. The bottom portion 50 includes a ground contact portion 50a that comes into contact with the ground contact surface when the container 10 is upright, and the peripheral surface 50b of the bottom portion 50 is connected to the lower end of the body portion 40 while expanding the diameter from the ground contact portion 50a. ..
　ここで、高さ方向とは、口部２０を上にして容器１０を水平面に正立させたときに、水平面に直交する方向をいうものとし、この状態（図３に示す状態）で容器１０の上下左右及び縦横の方向を規定するものとする。プリフォーム１の上下左右及び縦横の方向についても、これに準ずるものとする。 Here, the height direction means a direction orthogonal to the horizontal plane when the container 10 is upright on the horizontal plane with the mouth portion 20 facing up, and the container 10 is in this state (the state shown in FIG. 3). The vertical and horizontal directions and the vertical and horizontal directions of are specified. The same applies to the vertical and horizontal directions and the vertical and horizontal directions of the preform 1.
　プリフォーム本体１ａ（容器本体１０ａ）を形成する樹脂材料としては、ブロー成形が可能な任意の熱可塑性樹脂を使用することができるが、リサイクル性を考慮すると、ポリエチレンテレフタレートなどのポリエチレンテレフタレート系熱可塑性ポリエステルが好ましい。 As the resin material forming the preform main body 1a (container main body 10a), any blow-moldable thermoplastic resin can be used, but in consideration of recyclability, polyethylene terephthalate-based thermoplastics such as polyethylene terephthalate can be used. Polyester is preferred.
　被覆材層６（被覆層６０）を形成する樹脂材料としては、使用済みの容器１０を廃棄するに際し、被覆層６０を剥離して容器本体１０ａと分別する作業を容易にするという観点から、プリフォーム本体１ａを形成する樹脂材料と非相溶性の熱可塑性樹脂を用いるのが好ましい。プリフォーム本体１ａを形成する樹脂材料として、ポリエチレンテレフタレート系熱可塑性ポリエステルを用いる場合、被覆材層６を形成する樹脂材料には、例えば、ポリエチレン、ポリプロピレン等のポリオレフィン系樹脂、エチレン－ビニルアルコール共重合体、ポリメタキシリレンアジパミド（ＭＸＤ６）等のポリアミド系樹脂などを用いることができる。 As the resin material for forming the coating material layer 6 (coating layer 60), from the viewpoint of facilitating the work of peeling off the coating layer 60 and separating it from the container body 10a when the used container 10 is discarded. It is preferable to use a thermoplastic resin that is incompatible with the resin material that forms the reform body 1a. When polyethylene terephthalate-based thermoplastic polyester is used as the resin material forming the preform main body 1a, the resin material forming the covering material layer 6 is, for example, a polyolefin-based resin such as polyethylene or polypropylene, or an ethylene-vinyl alcohol co-weight. A polyamide-based resin such as a combination or a polymethoxylylene adipamide (MXD6) can be used.
　また、被覆材層６を形成する樹脂材料には、容器本体１０ａに求められるリサイクル性によって制限されることなく、顔料や着色剤などをはじめとする各種の添加剤を必要に応じて添加することができる。 Further, various additives such as pigments and colorants are added to the resin material forming the coating material layer 6 as necessary without being limited by the recyclability required for the container body 10a. Can be done.
　本実施形態において、プリフォーム本体１ａの外周面側に被覆材層６が積層されたプリフォーム１は、例えば、二色成形又はダブルモールドと称される射出成形法により、次のようにして成形することができる。 In the present embodiment, the preform 1 in which the covering material layer 6 is laminated on the outer peripheral surface side of the preform main body 1a is molded as follows by, for example, an injection molding method called two-color molding or double molding. can do.
　まず、プリフォーム本体１ａの内周面及びその口部２の上端面を成形するコア型１００と、ネックリング２ｂの上面及び周端面を含む口部２の外周面を成形する口部型１０１と、ネックリング２ｂの下面から底部５に至るまでのプリフォーム本体１ａの外周面を成形する第一の胴部型１０２とを型締めし、プリフォーム本体１ａを射出成形する（図４（ａ）参照）。次いで、第一の胴部型１０２に代えて、成形されたプリフォーム本体１ａとの間に被覆材層６を成形する空隙が形成されるように構成された第二の胴部型１０３を用いて型締めし直してから、プリフォーム本体１ａの外周面側に被覆材層６を射出成形することによって（図４（ｂ）参照）、プリフォーム本体１ａの外周面側に被覆材層６が積層されたプリフォーム１を成形することができる。 First, a core mold 100 that forms the inner peripheral surface of the preform main body 1a and the upper end surface of the mouth portion 2 thereof, and a mouth portion type 101 that forms the outer peripheral surface of the mouth portion 2 including the upper surface and the peripheral end surface of the neck ring 2b. , The first body mold 102 that forms the outer peripheral surface of the preform main body 1a from the lower surface to the bottom 5 of the neck ring 2b is molded, and the preform main body 1a is injection-molded (FIG. 4A). reference). Next, instead of the first body type 102, a second body type 103 configured to form a gap for forming the covering material layer 6 with the molded preform main body 1a is used. By injection molding the covering material layer 6 on the outer peripheral surface side of the preform main body 1a (see FIG. 4B), the covering material layer 6 is formed on the outer peripheral surface side of the preform main body 1a. The laminated preform 1 can be molded.
　なお、第一及び第二の胴部型１０２，１０３には、通常、プリフォーム１の底部５側に、樹脂材料の射出口となるゲートが配設されるが、図４に示す例では、ゲートの図示を省略している。特に図示しないが、第一及び第二の胴部型１０２，１０３は、必要に応じて、例えば、軸方向に直交する方向に開く割型構造とするなどして、型開きに支障がないようにすることができるのはいうまでもない。 The first and second body types 102 and 103 are usually provided with a gate serving as an injection port for the resin material on the bottom 5 side of the preform 1, but in the example shown in FIG. 4, the gate is arranged. The illustration of the gate is omitted. Although not particularly shown, the first and second body molds 102 and 103 are provided with a split mold structure that opens in a direction orthogonal to the axial direction, if necessary, so as not to hinder the mold opening. Needless to say, it can be.
　このようにして、プリフォーム１を成形するに際し、被覆材層６は、底部５から口部２の直下に至る全面を覆うとともに、その末端側が、口部２の下端側に設けられたネックリング２ｂの下面を覆いつつ、ネックリング２ｂの周端縁に達するように、プリフォーム本体１ａの外周面側に積層されているのが好ましい。 In this way, when the preform 1 is molded, the covering material layer 6 covers the entire surface from the bottom portion 5 to directly below the mouth portion 2, and the end side thereof is a neck ring provided on the lower end side of the mouth portion 2. It is preferable that the preform main body 1a is laminated on the outer peripheral surface side so as to reach the peripheral edge of the neck ring 2b while covering the lower surface of the 2b.
　このようにすることで、ネックリング２ｂを含むプリフォーム１の口部２は、ブロー成形によって延伸されないことから、ネックリング２ｂの下面を覆う被覆材層６の末端側は、そのまま容器１０が備える被覆層６０の末端側となる。このため、使用済みの容器１０を廃棄する際には、ネックリング２ｂの周端縁に達する被覆層６０の末端に手指を掛けるなどして、被覆層６０の末端側をネックリング２ｂから引き離しつつ、引き離された当該末端側を手指で摘んで、容器本体１０ａから被覆層６０を引き剥がしていくことによって、容器本体１０ａと被覆層６０とを容易に分別できるようにすることができる。これに加えて、このような態様は、内容物の光による変質を抑制するために、被覆層６０を着色して遮光性を付与することが要求される場合に、特に好ましい。 By doing so, since the mouth portion 2 of the preform 1 including the neck ring 2b is not stretched by blow molding, the container 10 is provided with the terminal side of the covering material layer 6 covering the lower surface of the neck ring 2b as it is. It is on the terminal side of the coating layer 60. Therefore, when the used container 10 is discarded, the end side of the coating layer 60 is separated from the neck ring 2b by hanging a finger on the end of the coating layer 60 reaching the peripheral edge of the neck ring 2b. By picking the separated end side with a finger and peeling the coating layer 60 from the container body 10a, the container body 10a and the coating layer 60 can be easily separated. In addition to this, such an embodiment is particularly preferable when it is required to color the coating layer 60 to impart light-shielding property in order to suppress deterioration of the contents due to light.
　さらに、本実施形態では、プリフォーム本体１ａの外周面側に積層された被覆材層６が、部分的に厚肉とされた厚肉部６ａを含むように成形され、図１及び図２に示す例では、軸方向に沿って延在する八つの厚肉部６ａが縦縞状に配設されている。 Further, in the present embodiment, the covering material layer 6 laminated on the outer peripheral surface side of the preform main body 1a is molded so as to include the thick portion 6a which is partially thickened, and is shown in FIGS. 1 and 2. In the example shown, eight thick portions 6a extending along the axial direction are arranged in a vertical stripe pattern.
　このような被覆材層６を備えるプリフォーム１を用いてブロー成形してなる容器１０にあっては、被覆材層６がプリフォーム本体１ａと一体に成形されて被覆層６０となるに際し、被覆材層６の肉厚分布が、被覆層６０の肉厚分布に反映される。その結果、図３に示すように、被覆材層６の厚肉部６ａに由来する厚肉部６０ａが、被覆層６０に形成される。 In the container 10 blow-molded using the preform 1 provided with such a covering material layer 6, the covering material layer 6 is integrally molded with the preform main body 1a to become the covering layer 60. The wall thickness distribution of the material layer 6 is reflected in the wall thickness distribution of the covering layer 60. As a result, as shown in FIG. 3, the thick portion 60a derived from the thick portion 6a of the covering material layer 6 is formed in the covering layer 60.
　ここで、図３に示す容器１０の一例において、容器１０が備える被覆層６０には、被覆材層６の厚肉部６ａに由来する八つの厚肉部６０ａが縦縞状に配設されて、縞模様を形成している。 Here, in an example of the container 10 shown in FIG. 3, eight thick portions 60a derived from the thick portion 6a of the covering material layer 6 are arranged in a vertical stripe shape on the coating layer 60 included in the container 10. It forms a striped pattern.
　このようにして、容器１０が備える被覆層６０に、部分的に厚肉とされた厚肉部６０ａが形成されるようにすることで、当該厚肉部６０ａにおける光の透過、吸収、反射、散乱などの程度が、他の部位と異なることに起因する、立体的な又は立体的に錯視される模様による加飾が可能になる。特に、被覆材層６を形成する樹脂材料に、顔料や着色剤などを添加した場合には、被覆層６０の厚肉部６０ａにおける明度が、他の部位に比べて低下するなどして、色調の変化を伴った加飾効果を発現させることもできる。
　これにより、本実施形態によれば、従来にはないデザイン上の特徴を備えた容器１０を提供することができる。 In this way, by forming a partially thickened thick portion 60a on the coating layer 60 provided in the container 10, light is transmitted, absorbed, and reflected in the thick portion 60a. It is possible to decorate with a three-dimensional or three-dimensional illusion pattern due to the degree of scattering and the like being different from other parts. In particular, when a pigment, a colorant, or the like is added to the resin material forming the coating material layer 6, the lightness of the thick portion 60a of the coating layer 60 is lower than that of other portions, and the color tone is reduced. It is also possible to develop a decorative effect accompanied by a change in.
Thereby, according to the present embodiment, it is possible to provide the container 10 having a design feature which has not been conventionally used.
　なお、図１及び図２に示すプリフォーム１の一例において、被覆材層６には、被覆材層６の表面側に突出するようにして厚肉部６ａが形成されているが、被覆材層６の肉厚分布を、ブロー成形された容器１０が備える被覆層６０の肉厚分布に反映させることがきれば、これに限定されない。例えば、図５に示すように、プリフォーム本体１ａに凹部を設け、かかる凹部に被覆材層６を形成する樹脂材料が充填されることによって、厚肉部６０ａが形成されるようにしてもよい。 In the example of the preform 1 shown in FIGS. 1 and 2, the covering material layer 6 is formed with a thick portion 6a so as to project toward the surface side of the covering material layer 6, but the covering material layer is formed. The thickness distribution of 6 is not limited to this as long as it can be reflected in the wall thickness distribution of the coating layer 60 included in the blow-molded container 10. For example, as shown in FIG. 5, a recess may be provided in the preform main body 1a, and the recess may be filled with a resin material forming the covering material layer 6 to form a thick portion 60a. ..
［第二実施形態］
　次に、本発明の第二実施形態について説明する。 [Second Embodiment]
Next, a second embodiment of the present invention will be described.
　図６は、本実施形態に係るプリフォームの概略を示す説明図であり、正面視したプリフォーム１の図中右側半分を切り欠いて、その縦断面を示しているが、断面にあらわれるプリフォーム本体１ａ、被覆材層６の肉厚を誇張して模式的に描写している。 FIG. 6 is an explanatory view showing an outline of the preform according to the present embodiment, and the right half of the preform 1 viewed from the front is cut out to show a vertical cross section thereof, but the preform appearing in the cross section is shown. The wall thickness of the main body 1a and the covering material layer 6 is exaggerated and schematically depicted.
　プリフォーム１は、前述した第一実施形態と同様に、円筒状の胴部４の一端側に口部２が形成され、他端側に半球状の底部５が形成された、一端が開口する有底筒状のプリフォーム本体１ａと、プリフォーム本体１ａの外周面側に積層された被覆材層６とを備えている。 Similar to the first embodiment described above, the preform 1 has a mouth portion 2 formed on one end side of a cylindrical body portion 4 and a hemispherical bottom portion 5 formed on the other end side, and one end thereof is open. It includes a bottomed tubular preform main body 1a and a covering material layer 6 laminated on the outer peripheral surface side of the preform main body 1a.
　また、図７は、図６に示すプリフォーム１をブロー成形してなる容器１０の一例を示しており、正面視した容器１０の図中右側半分を切り欠いて、その縦断面を示しているが、断面にあらわれる容器本体１０ａ、被覆層６０の肉厚を誇張して模式的に描写している。 Further, FIG. 7 shows an example of a container 10 obtained by blow-molding the preform 1 shown in FIG. 6, and the right half of the container 10 in the front view is cut out to show a vertical cross section thereof. However, the wall thickness of the container body 10a and the coating layer 60 appearing in the cross section is exaggerated and schematically depicted.
　容器１０は、前述した第一実施形態と同様に、口部２０、肩部３０、胴部４０、及び底部５０を含む所定の容器形状に成形された容器本体１０ａと、容器本体１０ａの外周面側に積層された被覆層６０とを備えている。 Similar to the first embodiment described above, the container 10 has a container body 10a formed into a predetermined container shape including a mouth portion 20, a shoulder portion 30, a body portion 40, and a bottom portion 50, and an outer peripheral surface of the container body 10a. It is provided with a coating layer 60 laminated on the side.
　本実施形態にあっても、プリフォーム本体１ａの外周面側に積層された被覆材層６は、部分的に厚肉とされた厚肉部６ａを含むように成形されるが、図６に示す例では、周方向に沿って延在する二つの厚肉部６ａが、胴部４の上端側と下端側のそれぞれに配設されている。そして、厚肉部６ａの配置や寸法などは、ブロー成形時の縦横の延伸倍率などを考慮して、図７に示すように、ブロー成形された容器１０が備える被覆層６０において、肩部３０と胴部４０との連接部に沿った部位と、底部５０の周面５０ｂに沿った部位に、厚肉部６０ａが環状に配設されるように設定されている。 Even in the present embodiment, the covering material layer 6 laminated on the outer peripheral surface side of the preform main body 1a is formed so as to include the thick portion 6a which is partially thickened. In the example shown, two thick portions 6a extending along the circumferential direction are arranged on the upper end side and the lower end side of the body portion 4, respectively. As for the arrangement and dimensions of the thick portion 6a, as shown in FIG. 7, in consideration of the vertical and horizontal stretch ratios during blow molding, the shoulder portion 30 is provided in the coating layer 60 included in the blow molded container 10. The thick portion 60a is set to be arranged in an annular shape at a portion along the connection portion between the body portion 40 and the body portion 40 and a portion along the peripheral surface 50b of the bottom portion 50.
　図７に示すような容器形状の容器１０にあっては、輸送中、又は自動販売機から排出される際などに、肩部３０と胴部４０との連接部に沿った部位や、底部５０の周面５０ｂに沿った部位にダメージを受け易く、被覆層６０が損傷してしまう虞がある。これに対して、本実施形態によれば、これらの部位に厚肉部６０ａが配設されるようにすることで、被覆層６０全体を厚肉に形成することによる重量増加を避けて、ダメージを受け易い部位の強度を選択的に向上させることもできる。さらに、容器１０が備える被覆層６０に厚肉部６０ａを配設することで、従来にはないデザイン上の特徴を付与することもできる。 In the container 10 having a container shape as shown in FIG. 7, a portion along the joint portion between the shoulder portion 30 and the body portion 40 and the bottom portion 50 during transportation or when discharged from the vending machine are used. The portion along the peripheral surface 50b is easily damaged, and the coating layer 60 may be damaged. On the other hand, according to the present embodiment, by disposing the thick portion 60a in these portions, the weight increase due to the formation of the entire coating layer 60 in the thick thickness is avoided, and the damage is avoided. It is also possible to selectively improve the strength of the susceptible portion. Further, by disposing the thick portion 60a on the covering layer 60 provided in the container 10, it is possible to impart design features that have not been seen in the past.
　本実施形態では、プリフォーム１の被覆材層６における厚肉部６ａの配置を、プリフォーム１をブロー成形してなる容器１０の容器形状に応じて、容器１０がダメージを受け易い部位に、厚肉部６０ａが配設されるように設定した点が、前述した第一実施形態と異なるが、それ以外の構成は前述した第一実施形態と共通するため、重複する説明は省略する。 In the present embodiment, the thick portion 6a in the covering material layer 6 of the preform 1 is arranged at a portion where the container 10 is easily damaged according to the container shape of the container 10 obtained by blow molding the preform 1. The point that the thick portion 60a is set to be arranged is different from the first embodiment described above, but since the other configurations are the same as those of the first embodiment described above, overlapping description will be omitted.
［第三実施形態］
　次に、本発明の第三実施形態について説明する。 [Third Embodiment]
Next, a third embodiment of the present invention will be described.
　図８は、本実施形態に係るプリフォームの概略を示す説明図であり、図９は、図８のＢ－Ｂ端面図である。 FIG. 8 is an explanatory view showing an outline of the preform according to the present embodiment, and FIG. 9 is an end view of BB of FIG.
　なお、図８には、正面視したプリフォーム１の口部２から胴部４の上端側の一部を切り欠いて、その縦断面を示しているが、断面にあらわれるプリフォーム本体１ａ、被覆材層６の肉厚を誇張して模式的に描写している。図９においても、断面にあらわれるプリフォーム本体１ａ、被覆材層６の肉厚を誇張して模式的に描写している。 Note that FIG. 8 shows a vertical cross section of the preform 1 seen from the front by cutting out a part of the upper end side of the body 4 from the mouth portion 2, but the preform main body 1a appearing in the cross section is covered. The wall thickness of the material layer 6 is exaggerated and schematically depicted. Also in FIG. 9, the wall thicknesses of the preform main body 1a and the covering material layer 6 appearing in the cross section are exaggerated and schematically depicted.
　プリフォーム１は、前述した第一実施形態と同様に、円筒状の胴部４の一端側に口部２が形成され、他端側に半球状の底部５が形成された、一端が開口する有底筒状のプリフォーム本体１ａと、プリフォーム本体１ａの外周面側に積層された被覆材層６とを備えている。 Similar to the first embodiment described above, the preform 1 has a mouth portion 2 formed on one end side of a cylindrical body portion 4 and a hemispherical bottom portion 5 formed on the other end side, and one end thereof is open. It includes a bottomed tubular preform main body 1a and a covering material layer 6 laminated on the outer peripheral surface side of the preform main body 1a.
　また、図１０は、図８及び図９に示すプリフォーム１をブロー成形してなる容器１０の一例を示しており、正面視した容器１０の口部２０から肩部３０の上端側の一部を切り欠いて、その断面を示しているが、断面にあらわれる容器本体１０ａ、被覆層６０の肉厚を誇張して模式的に描写している。 Further, FIG. 10 shows an example of a container 10 obtained by blow-molding the preform 1 shown in FIGS. 8 and 9, and is a part of the upper end side of the shoulder portion 30 from the mouth portion 20 of the container 10 viewed from the front. Is cut out to show the cross section, but the thickness of the container body 10a and the coating layer 60 appearing in the cross section is exaggerated and schematically depicted.
　容器１０は、前述した第一実施形態と同様に、口部２０、肩部３０、胴部４０、及び底部５０を含む所定の容器形状に成形された容器本体１０ａと、容器本体１０ａの外周面側に積層された被覆層６０とを備えている。 Similar to the first embodiment described above, the container 10 has a container body 10a formed into a predetermined container shape including a mouth portion 20, a shoulder portion 30, a body portion 40, and a bottom portion 50, and an outer peripheral surface of the container body 10a. It is provided with a coating layer 60 laminated on the side.
　本実施形態において、プリフォーム本体１ａの外周面側に積層された被覆材層６は、被覆材層６が部分的に欠損した欠損部６ｂを含むように成形され、図８及び図９に示す例では、軸方向に沿って細幅に延在する欠損部６ｂが、胴部４の上端側から底部５側に至る範囲に配設されている。 In the present embodiment, the dressing layer 6 laminated on the outer peripheral surface side of the preform main body 1a is molded so as to include the defective portion 6b in which the dressing layer 6 is partially defective, and is shown in FIGS. 8 and 9. In the example, the defect portion 6b extending narrowly along the axial direction is arranged in a range extending from the upper end side to the bottom portion 5 side of the body portion 4.
　このような被覆材層６を備えるプリフォーム１を用いてブロー成形してなる容器１０にあっては、被覆材層６がプリフォーム本体１ａと一体に成形されて被覆層６０となるに際し、図１０に示すように、被覆材層６の欠損部６ｂに由来する欠損部６０ｂが、被覆層６０に形成される。 In the container 10 blow-molded using the preform 1 provided with such a covering material layer 6, when the covering material layer 6 is integrally molded with the preform main body 1a to become the covering layer 60, the figure is shown. As shown in 10, the defect portion 60b derived from the defect portion 6b of the coating material layer 6 is formed in the coating layer 60.
　ここで、図１０に示す容器１０の一例において、容器１０が備える被覆層６０には、肩部３０の上端側から底部５０に至る範囲に、欠損部６０ｂが細幅に配設されている。 Here, in the example of the container 10 shown in FIG. 10, the defective portion 60b is narrowly arranged in the covering layer 60 included in the container 10 in the range from the upper end side of the shoulder portion 30 to the bottom portion 50.
　このようにして、容器１０が備える被覆層６０に、被覆層６０が部分的に欠損した欠損部６０ｂが形成されるようにすることで、内容物の光による変質を抑制するために、被覆層６０を着色して遮光性を付与した場合であっても、欠損部６０ｂを通して、容器１０内の内容液の液位を視認可能とすることができる。さらに、容器１０が備える被覆層６０に欠損部６０ｂを配設することで、従来にはないデザイン上の特徴を付与することもできる。 In this way, the coating layer 60 provided in the container 10 is formed with a defective portion 60b in which the coating layer 60 is partially defective, so that deterioration of the contents due to light is suppressed. Even when the 60 is colored to impart a light-shielding property, the liquid level of the content liquid in the container 10 can be visually recognized through the defective portion 60b. Further, by disposing the defective portion 60b on the covering layer 60 provided in the container 10, it is possible to impart design features that have not been seen in the past.
　本実施形態では、プリフォーム本体１ａの外周面側に、部分的に欠損した欠損部６ｂを含むように被覆材層６を積層し、当該欠損部６ｂに由来する欠損部６０ｂが、プリフォーム１をブロー成形してなる容器１０が備える被覆層６０に成形されるようにした点が、前述した第一実施形態と異なるが、それ以外の構成は前述した第一実施形態と共通するため、重複する説明は省略する。 In the present embodiment, the covering material layer 6 is laminated on the outer peripheral surface side of the preform main body 1a so as to include the partially defective defective portion 6b, and the defective portion 60b derived from the defective portion 6b is the preform 1. It is different from the above-mentioned first embodiment in that it is formed into the coating layer 60 provided in the container 10 which is blow-molded. The explanation to be given is omitted.
　以上、本発明について、好ましい実施形態を示して説明したが、本発明は、前述した実施形態にのみ限定されるものではなく、本発明の範囲で種々の変更実施が可能であることはいうまでもない。 Although the present invention has been described above with reference to preferred embodiments, it is needless to say that the present invention is not limited to the above-described embodiments, and various modifications can be made within the scope of the present invention. Nor.
　例えば、前述した第一実施形態では、容器１０が備える被覆層６０に、厚肉部６０ａを縦縞状に配設してなる縞模様を形成した例を示したが、被覆層６０に形成される模様は、これに限定されない。図形や文字、各種の装飾柄、これらの組み合わせなどからなる模様であってもよい。さらに、被覆層６０に形成される模様は、部分的に厚肉とされた厚肉部６０ａによるものに限らず、前述した第三実施形態に示したような、被覆層６０を部分的に欠損させた欠損部６０ｂによってもよく、特に図示しないが、被覆層６０を部分的に薄肉にした薄肉部によってもよい。容器１０が備える被覆層６０には、プリフォーム１の被覆材層６の肉厚分布を適宜調整することによって、これらの少なくともいずれか一つ、又はこれらの組み合わせによる模様を形成することができる。 For example, in the above-mentioned first embodiment, an example in which a striped pattern formed by arranging thick portions 60a in a vertical stripe pattern on the coating layer 60 provided in the container 10 is shown, but it is formed on the coating layer 60. The pattern is not limited to this. It may be a pattern consisting of figures, characters, various decorative patterns, combinations thereof, and the like. Further, the pattern formed on the coating layer 60 is not limited to the thick portion 60a that is partially thickened, and the coating layer 60 is partially deleted as shown in the above-mentioned third embodiment. It may be a defective portion 60b that has been made to be formed, or may be a thin portion in which the coating layer 60 is partially thinned, although not particularly shown. By appropriately adjusting the wall thickness distribution of the coating material layer 6 of the preform 1, a pattern formed by at least one of these or a combination thereof can be formed on the coating layer 60 provided in the container 10.
　また、前述した第二実施形態において、容器１０が備える被覆層６０には、肩部３０と胴部４０との連接部に沿った部位と、底部５０の周面５０ｂに沿った部位の両方に、厚肉部６０ａが配設されているが、これに限定されない。必要に応じて、肩部３０と胴部４０との連接部に沿った部位と、底部５０の周面５０ｂに沿った部位のいずれか一方としてもよく、容器１０が物理的又は化学的にダメージを受け易い部位の強度を選択的に向上させることができるように、プリフォーム１の被覆材層６の肉厚分布を適宜調整して、当該部位に厚肉部６０ａが配設されるようにすることができる。 Further, in the second embodiment described above, the covering layer 60 included in the container 10 has both a portion along the connecting portion between the shoulder portion 30 and the body portion 40 and a portion along the peripheral surface 50b of the bottom portion 50. , The thick portion 60a is arranged, but the present invention is not limited to this. If necessary, it may be either a portion along the joint portion between the shoulder portion 30 and the body portion 40 or a portion along the peripheral surface 50b of the bottom portion 50, and the container 10 is physically or chemically damaged. The wall thickness distribution of the covering material layer 6 of the preform 1 is appropriately adjusted so that the thick portion 60a is arranged in the portion so that the strength of the susceptible portion can be selectively improved. can do.
　また、前述した第二実施形態及び第三実施形態においても、前述した第一実施形態と同様にして、厚肉部、薄肉部、又は欠損部の少なくともいずれか一つ、又はこれらの組み合わせによる模様を容器１０が備える被覆層６０に形成するようにしてもよい。 Further, also in the above-mentioned second embodiment and the third embodiment, as in the above-mentioned first embodiment, at least one of the thick-walled portion, the thin-walled portion, or the defective portion, or a combination thereof is used. May be formed on the coating layer 60 provided in the container 10.
　また、前述した実施形態のいずれにおいても、いわゆる丸形ボトルと称される容器形状に成形された容器１０の例を示したが、これに限定されない。いわゆる角形ボトルと称される容器形状としてもよく、いわゆるペタロイド形状とされた底部５０を備える容器形状としてもよい。さらに、胴部４０が円柱状に成形され、その上面側中央部に口部２０が設けられた容器形状であってもよい。 Further, in any of the above-described embodiments, an example of a container 10 formed into a container shape, which is a so-called round bottle, is shown, but the present invention is not limited thereto. It may be a container shape called a so-called square bottle, or it may be a container shape having a bottom 50 which is a so-called petaloid shape. Further, the body portion 40 may be formed into a columnar shape, and the mouth portion 20 may be provided in the central portion on the upper surface side thereof in a container shape.
　１　　　　　プリフォーム
　１ａ　　　　　プリフォーム本体
　６　　　　　被覆材層
　６ａ　　　　　厚肉部
　６ｂ　　　　　欠損部
　１０　　　　　容器
　１０ａ　　　　　容器本体
　２０　　　　　口部
　３０　　　　　肩部
　４０　　　　　胴部
　５０　　　　　底部
　５０ｂ　　　　　周面（底部の周面）
　６０　　　　　被覆層
　６０ａ　　　　　厚肉部
　６０ｂ　　　　　欠損部

  1 Preform 1a Preform body 6 Coating material layer 6a Thick part 6b Defect part 10 Container 10a Container body 20 Mouth 30 Shoulder 40 Body 50 Bottom 50b Peripheral surface (peripheral surface of bottom)
60 Coating layer 60a Thick part 60b Defect part

Claims (6)

  1. 　合成樹脂製容器をブロー成形によって製造するためのプリフォームであって、
    　一端側が開口する有底筒状のプリフォーム本体と、
    　前記プリフォーム本体の外周面側に積層された被覆材層と
    を備え、
    　前記被覆材層が、部分的に厚肉とされた厚肉部、部分的に薄肉とされた薄肉部、又は部分的に欠損させた欠損部の少なくともいずれか一つを含むことを特徴とするプリフォーム。     A preform for manufacturing synthetic resin containers by blow molding.
    A bottomed tubular preform body with one end open,
    A covering material layer laminated on the outer peripheral surface side of the preform main body is provided.
    The covering material layer is characterized by containing at least one of a partially thickened portion, a partially thinned portion, and a partially defective portion. preform.
  2. 　所定の容器形状に成形された容器本体と、前記容器本体の外周面側に積層された被覆層とを備える合成樹脂製容器の製造方法であって、
    　請求項１に記載のプリフォームをブロー成形し、
    　前記厚肉部、前記薄肉部、又は前記欠損部の少なくともいずれか一つによる前記被覆材層の肉厚分布を、前記被覆層の肉厚分布に反映させることを特徴とする合成樹脂製容器の製造方法。     A method for manufacturing a synthetic resin container including a container body formed into a predetermined container shape and a coating layer laminated on the outer peripheral surface side of the container body.
    The preform according to claim 1 is blow molded and then blow-molded.
    A container made of synthetic resin, characterized in that the wall thickness distribution of the covering material layer by at least one of the thick portion, the thin wall portion, and the defective portion is reflected in the wall thickness distribution of the coating layer. Production method.
  3. 　所定の容器形状に成形された容器本体と、前記容器本体の外周面側に積層された被覆層とを備える合成樹脂製容器であって、
    　前記被覆層が、部分的に厚肉とされた厚肉部、部分的に薄肉とされた薄肉部、又は部分的に欠損させた欠損部の少なくともいずれか一つを含むことを特徴とする合成樹脂製容器。     A synthetic resin container including a container body formed into a predetermined container shape and a coating layer laminated on the outer peripheral surface side of the container body.
    The synthesis is characterized in that the coating layer contains at least one of a partially thickened portion, a partially thinned portion, and a partially defective portion. Resin container.
  4. 　前記厚肉部、前記薄肉部、又は前記欠損部の少なくともいずれか一つ、又はこれらの組み合わせによる模様が、前記被覆層に形成されている請求項３に記載の合成樹脂製容器。 The synthetic resin container according to claim 3, wherein a pattern formed by at least one of the thick portion, the thin portion, the defective portion, or a combination thereof is formed on the coating layer.
  5. 　前記容器本体が、口部、肩部、胴部、及び底部を備え、
    　前記被覆層が、前記肩部と前記胴部との連接部に沿った部位と、前記底部の周面に沿った部位とのいずれか一方、又は両方に、部分的に厚肉とされた厚肉部が環状に配設されている請求項３又は４に記載の合成樹脂製容器。     The container body comprises a mouth, shoulders, body, and bottom.
    The thickness of the covering layer is partially thickened in one or both of the portion along the joint portion between the shoulder portion and the body portion and the portion along the peripheral surface of the bottom portion. The synthetic resin container according to claim 3 or 4, wherein the meat portion is arranged in a ring shape.
  6. 　前記被覆層が、前記被覆層が部分的に欠損した欠損部を含み、
    　前記欠損部を通して容器内が視認可能な請求項３又は４に記載の合成樹脂製容器。

          The coating layer contains a defect portion in which the coating layer is partially deleted.
    The synthetic resin container according to claim 3 or 4, wherein the inside of the container can be visually recognized through the defective portion.
PCT/JP2021/025425 2020-10-07 2021-07-06 Preform, and synthetic resin container and method for manufacturing same WO2022074885A1 (en)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH1190975A (en) * 1997-09-18 1999-04-06 Toyo Seikan Kaisha Ltd Multilayer preform with recovery polyester resin layer, manufacture of the preform, and multilayer container molded from the preform
JP2016068476A (en) * 2014-09-30 2016-05-09 大日本印刷株式会社 Method for producing composite container, composite preform, composite container, and bottom protective member
JP2019131300A (en) * 2019-04-25 2019-08-08 大日本印刷株式会社 Composite container and production method thereof

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH1190975A (en) * 1997-09-18 1999-04-06 Toyo Seikan Kaisha Ltd Multilayer preform with recovery polyester resin layer, manufacture of the preform, and multilayer container molded from the preform
JP2016068476A (en) * 2014-09-30 2016-05-09 大日本印刷株式会社 Method for producing composite container, composite preform, composite container, and bottom protective member
JP2019131300A (en) * 2019-04-25 2019-08-08 大日本印刷株式会社 Composite container and production method thereof

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