WO2005039855A1 - 多層溶融樹脂塊及び該多層溶融樹脂塊から圧縮成形されたブロー成形用多層予備成形物並びに多層容器 - Google Patents
多層溶融樹脂塊及び該多層溶融樹脂塊から圧縮成形されたブロー成形用多層予備成形物並びに多層容器 Download PDFInfo
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- WO2005039855A1 WO2005039855A1 PCT/JP2004/015506 JP2004015506W WO2005039855A1 WO 2005039855 A1 WO2005039855 A1 WO 2005039855A1 JP 2004015506 W JP2004015506 W JP 2004015506W WO 2005039855 A1 WO2005039855 A1 WO 2005039855A1
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- Prior art keywords
- resin
- multilayer
- layer
- molten resin
- multilayered
- Prior art date
Links
- 229920005989 resin Polymers 0.000 title claims abstract description 201
- 239000011347 resin Substances 0.000 title claims abstract description 200
- 238000000071 blow moulding Methods 0.000 title claims description 18
- 238000000748 compression moulding Methods 0.000 title claims description 8
- 238000000465 moulding Methods 0.000 claims description 4
- 230000006835 compression Effects 0.000 claims description 3
- 238000007906 compression Methods 0.000 claims description 3
- 239000010410 layer Substances 0.000 abstract description 178
- 239000011229 interlayer Substances 0.000 abstract description 9
- 230000002093 peripheral effect Effects 0.000 abstract description 4
- 230000001105 regulatory effect Effects 0.000 abstract 1
- 238000001125 extrusion Methods 0.000 description 10
- 230000000052 comparative effect Effects 0.000 description 8
- 230000007246 mechanism Effects 0.000 description 7
- 238000000034 method Methods 0.000 description 5
- 230000004888 barrier function Effects 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000004898 kneading Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000006185 dispersion Substances 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- -1 polyethylene terephthalate Polymers 0.000 description 2
- 229920000139 polyethylene terephthalate Polymers 0.000 description 2
- 239000005020 polyethylene terephthalate Substances 0.000 description 2
- 229920003002 synthetic resin Polymers 0.000 description 2
- 239000000057 synthetic resin Substances 0.000 description 2
- MMOXZBCLCQITDF-UHFFFAOYSA-N N,N-diethyl-m-toluamide Chemical compound CCN(CC)C(=O)C1=CC=CC(C)=C1 MMOXZBCLCQITDF-UHFFFAOYSA-N 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000014509 gene expression Effects 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 229920001225 polyester resin Polymers 0.000 description 1
- 239000004645 polyester resin Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000011342 resin composition Substances 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B11/00—Making preforms
- B29B11/14—Making preforms characterised by structure or composition
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B11/00—Making preforms
- B29B11/06—Making preforms by moulding the material
- B29B11/10—Extrusion moulding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B11/00—Making preforms
- B29B11/06—Making preforms by moulding the material
- B29B11/12—Compression 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
- B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
- B29C43/02—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles
- B29C43/20—Making multilayered or multicoloured articles
- B29C43/203—Making multilayered articles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
- B29C49/02—Combined blow-moulding and manufacture of the preform or the parison
-
- 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
- B29C49/071—Preforms or parisons characterised by their configuration, e.g. geometry, dimensions or physical properties
-
- 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
- B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
- B29C43/32—Component parts, details or accessories; Auxiliary operations
- B29C43/34—Feeding the material to the mould or the compression means
- B29C2043/3433—Feeding the material to the mould or the compression means using dispensing heads, e.g. extruders, placed over or apart from the moulds
-
- 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
- B29C2949/00—Indexing scheme relating to blow-moulding
- B29C2949/07—Preforms or parisons characterised by their configuration
- B29C2949/0715—Preforms or parisons characterised by their configuration the preform having one end closed
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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
- B29C2949/00—Indexing scheme relating to blow-moulding
- B29C2949/07—Preforms or parisons characterised by their configuration
- B29C2949/081—Specified dimensions, e.g. values or ranges
- B29C2949/0811—Wall thickness
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- 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
- B29C2949/00—Indexing scheme relating to blow-moulding
- B29C2949/20—Preforms or parisons whereby a specific part is made of only one component, e.g. only one layer
- B29C2949/22—Preforms or parisons whereby a specific part is made of only one component, e.g. only one layer at neck portion
-
- 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
- B29C2949/00—Indexing scheme relating to blow-moulding
- B29C2949/20—Preforms or parisons whereby a specific part is made of only one component, e.g. only one layer
- B29C2949/24—Preforms or parisons whereby a specific part is made of only one component, e.g. only one layer at flange portion
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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
- B29C2949/00—Indexing scheme relating to blow-moulding
- B29C2949/30—Preforms or parisons made of several components
- B29C2949/3008—Preforms or parisons made of several components at neck portion
-
- 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
- B29C2949/00—Indexing scheme relating to blow-moulding
- B29C2949/30—Preforms or parisons made of several components
- B29C2949/3012—Preforms or parisons made of several components at flange portion
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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
- B29C2949/00—Indexing scheme relating to blow-moulding
- B29C2949/30—Preforms or parisons made of several components
- B29C2949/3016—Preforms or parisons made of several components at body portion
-
- 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
- B29C2949/00—Indexing scheme relating to blow-moulding
- B29C2949/30—Preforms or parisons made of several components
- B29C2949/3016—Preforms or parisons made of several components at body portion
- B29C2949/3018—Preforms or parisons made of several components at body portion partially
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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
- B29C2949/00—Indexing scheme relating to blow-moulding
- B29C2949/30—Preforms or parisons made of several components
- B29C2949/302—Preforms or parisons made of several components at bottom portion
-
- 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
- B29C2949/00—Indexing scheme relating to blow-moulding
- B29C2949/30—Preforms or parisons made of several components
- B29C2949/3024—Preforms or parisons made of several components characterised by the number of components or by the manufacturing technique
- B29C2949/3026—Preforms or parisons made of several components characterised by the number of components or by the manufacturing technique having two or more components
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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
- B29C2949/00—Indexing scheme relating to blow-moulding
- B29C2949/30—Preforms or parisons made of several components
- B29C2949/3024—Preforms or parisons made of several components characterised by the number of components or by the manufacturing technique
- B29C2949/3026—Preforms or parisons made of several components characterised by the number of components or by the manufacturing technique having two or more components
- B29C2949/3028—Preforms or parisons made of several components characterised by the number of components or by the manufacturing technique having two or more components having three or more components
-
- 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
- B29C2949/00—Indexing scheme relating to blow-moulding
- B29C2949/30—Preforms or parisons made of several components
- B29C2949/3056—Preforms or parisons made of several components having components being compression moulded
- B29C2949/3058—Preforms or parisons made of several components having components being compression moulded having two or more components being compression moulded
-
- 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
- B29C2949/00—Indexing scheme relating to blow-moulding
- B29C2949/30—Preforms or parisons made of several components
- B29C2949/3056—Preforms or parisons made of several components having components being compression moulded
- B29C2949/3058—Preforms or parisons made of several components having components being compression moulded having two or more components being compression moulded
- B29C2949/306—Preforms or parisons made of several components having components being compression moulded having two or more components being compression moulded having three or more components being compression moulded
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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
- B29C49/22—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
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
- B29K2105/25—Solid
- B29K2105/253—Preform
- B29K2105/258—Tubular
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2001/00—Articles provided with screw threads
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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]
Definitions
- Multilayer molten resin mass Multilayer preform for blow molding compression-molded from the multilayer molten resin mass, and multilayer container
- the present invention relates to a multilayer molten resin mass, a multilayer preform for blow molding, which is compression-molded from the multilayer molten resin mass, and a multilayer container.
- multi-layer synthetic resin containers such as multi-layer stretch blow-molded synthetic resin bottles have been widely distributed, and a resin layer having excellent gas-nollability or the like or a recycled resin layer can be disposed therein.
- a multilayer structure such as the one described in Patent Document 1
- the intermediate resin layer composed of gas barrier resin, recycled resin, etc. of such containers is required to be enclosed in the inner and outer resin layers without being exposed on the inner and outer surfaces of the container.
- the present inventors have extruded a multilayer molten resin mass in which an intermediate resin layer (gas barrier resin) is enclosed in an inner and outer layer resin while being eccentric downward. It has been proposed that a multilayer preform as a multilayer molded product for blow molding be manufactured by supplying the multilayer molten resin mass to a cavity mold and compressing the same with a core mold (Patent Document 2). In the multilayer molten resin mass produced by the above method, since the intermediate layer resin is contained in the multilayer molten resin mass in an eccentric state downward, the core mold first engages when compressed with the core mold.
- the preform thus obtained is ideally such that the inner and outer layers and the intermediate resin layer have a uniform thickness over the entire circumference. If the wall is excessively thin, cut or rounded, or excessively thick, the intermediate resin layer It is observed that there is a portion exposed on the innermost and outermost layer surfaces. As a result, for example, the thickness of the intermediate resin layer is excessively thin or cut off! If there is a part, there is a problem that the function required for the intermediate resin layer cannot be sufficiently exhibited, such as an appropriate gas barrier property cannot be obtained. Also, when the intermediate resin layer is exposed on the innermost layer surface, the content liquid directly contacts the intermediate resin layer and has an unfavorable effect on the content liquid, or the intermediate resin layer absorbs water in the contents.
- the layer distribution of the multilayer preform must be such that the intermediate resin layers are completely located in the inner and outer resin layers and are uniformly distributed in the circumferential direction. Force A method for obtaining such a layer distribution of the preform in a stable manner has been established.
- Patent Document 1 Japanese Patent Application Laid-Open No. 2003-39531
- Patent Document 2 Japanese Patent Application Laid-Open No. 2003-33964
- the present invention has been made in view of the above circumstances, and is directed to a method for compression-molding a multilayer molten resin mass to obtain a multilayer compression-molded product, wherein a layer distribution of the multilayer compression-molded product is changed to an intermediate resin.
- the purpose of the present invention is to obtain a multilayer compression-molded product in which the layers are completely located in the inner and outer resin layers and are uniformly distributed in the circumferential direction. More specifically, such a multilayer compression-molded product can be obtained. It is intended to obtain a multilayer molten resin mass.
- the multilayer molten resin mass of the present invention is a multilayer molten resin mass for obtaining a multilayer compression-molded product by compression molding, and an intermediate resin constituting an intermediate resin layer of the multilayer molten resin mass.
- Laminating force The inner layer and the outer layer constituting the inner and outer layers are eccentrically encapsulated downward and enclosed in the inner layer, and the intermediate layer has a concave shape.
- the intermediate layer resin preferably has a lower end force, and the distance to the lower end of the multilayer molten resin mass is preferably 10% or less of the total length of the multilayer molten resin mass.
- the shape of the intermediate layer resin is y (intermediate layer resin umbrella length) ⁇ L (intermediate layer resin central portion length), and 1> d (intermediate in the circumferential direction). It is desirable that ZD (outer diameter of multilayer molten resin in the circumferential direction) ⁇ 0.5.
- blow-molded multilayer container such as a multilayer bottle of high quality, which is uniformly distributed and does not expose the intermediate resin layer to the inner peripheral surface.
- lower side and “lower end” are expressions based on the case where molten lump mass is dropped into a female type (cavity type), with a female type above and a male type below.
- the (core type) When the (core type) is arranged, it will be concave and located on the upper side, so the above term is used for convenience, and does not necessarily mean physically lower and lower ends. What! /.
- a multilayer molded resin having a substantially uniform layer thickness distribution and capable of forming a multilayer molded product and a multilayer preformed product for blow molding having a secured innermost layer thickness. Lumps can be obtained. Therefore, the multilayer preform for blow molding obtained from the multilayer molten resin mass obtained by the present invention has a substantially uniform layer distribution in the circumferential direction, and the multilayer preform for blow molding is biaxially stretch-formed. As a result, the intermediate resin layer is located in the inner and outer resin layers and is distributed almost uniformly in the circumferential direction, so that the intermediate resin layer is not exposed on the inner peripheral surface, and a high-quality multi-layer bottle is not provided. Etc. can be obtained. Brief Description of Drawings
- FIG. 1 is a schematic view showing the concept of a multilayer molten resin lump of the present invention.
- FIG. 2 is a schematic cross-sectional view showing one embodiment of an extruder for extruding a multilayer molten resin mass.
- FIG. 3 is a schematic cross-sectional view showing another embodiment of an extruder for extruding a multilayer molten resin mass.
- FIG. 4 (a) is a cross-sectional view of a multilayer molten resin lump according to an example of the present invention, and (b) is a cross-sectional view of a multilayer molten resin lump of a comparative example.
- FIG. 5 is a front cross-sectional view of a blow molding preform, showing a dimensional position from below a neck.
- FIG. 6 is a graph showing variations in the thickness of the innermost layer in the circumferential direction in Examples and Comparative Examples.
- FIG. 7 is a graph showing variations in the thickness of the intermediate layer in the circumferential direction in Examples and Comparative Examples.
- FIG. 8 is a graph showing a change in thickness of each layer at an axial height position in the preform of the example.
- FIG. 9 is a graph showing a change in each layer thickness at an axial height position in a preform of a comparative example.
- FIG. 1 is a schematic view showing the basic principle of a multilayer molten resin mass according to the present invention
- Reference numeral 1 denotes an inner / outer layer resin 2 in which an intermediate layer resin 3 composed of, for example, a resin having excellent gas-noller properties is buried. It can be obtained by such a molten resin extrusion supply device.
- the multilayer molten resin mass has a substantially cylindrical outer shape in which the lower portion is slightly rounded and swells, and is located in a state in which the intermediate layer resin is embedded in the inner and outer layer resin near the lower portion thereof, You.
- the arrangement and shape of the interlayer resin in the inner and outer layer resins have an important effect on controlling the layer distribution of the multilayer compression preform as described later.
- the intermediate layer resin 3 is a multilayer melt resin. It is located below the block in the longitudinal direction, has a concave central portion as a whole, and its periphery extends upward like an umbrella, forming a concave shape.
- the arrangement position and shape of the intermediate resin layer 3 in the inner and outer resin layers 2 need to satisfy the following conditions in FIG.
- the distance t from the lower end of the intermediate layer resin 3 to the lower end of the multilayer molten resin lump 1 is 10% or less of the total length Z of the multilayer molten resin lump, that is, tZz ⁇ 0.1
- the length y of the resin umbrella portion is larger than the length L of the central portion and y ⁇ L.
- the maximum outer diameter d of the intermediate resin layer in the circumferential direction is the outer diameter of the multilayer molten resin mass in the circumferential direction.
- a multilayer molded product having a substantially uniform layer distribution in the circumferential direction at the body and the bottom and a multilayer preformed product for blow molding are obtained. be able to.
- the multilayer preform for blow molding is biaxially stretch-molded, so that the layer distribution of the multilayer compression-molded product is such that the intermediate resin layer is completely located in the inner and outer resin layers, and is circumferentially oriented. It is possible to obtain a blow-molded multilayer container such as a multilayer bottle of high quality, which is uniformly distributed and does not expose the intermediate resin layer to the inner peripheral surface.
- (D) is not a necessary condition, but it is desirable that such a condition is satisfied.
- t / Z> 0.1 the intermediate layer goes upward, it is difficult to secure a uniform intermediate layer, and l> d ZD ⁇ 0.5 and l> dZD ⁇ 0.5 If the ratio is out of the range, the thickness of the intermediate layer becomes unstable during compression molding, and a molded product having a uniform layer distribution cannot be obtained.
- the multilayer molten resin mass can be formed, for example, by an extruder as shown in Fig. 2 or Fig. 3 as follows.
- the multilayer molten resin lump extruder 10 shown in FIG. 2 includes an extruder 11a for melting and kneading the inner and outer layer resin, an extruder lib for melting and kneading the intermediate layer resin, and an intermediate layer cutting machine.
- An extruder 11c for melt-kneading the fat.
- the die 13 to which these extruders are connected is provided with an inner / outer layer resin passage 14a, an intermediate layer resin passage 14b, and an intermediate layer cutting resin passage 14c. , 14b, 14c meet at the extrusion passage 15.
- Intermittent pressurizing mechanisms 16b and 16c are provided between the extruder lib and the intermediate layer resin passage 14b and between the extruder 11c and the intermediate layer cutting resin passage 14c, respectively.
- the intermediate layer can be completely cut out by intermittently extruding and further intermittently extruding the intermediate layer cutting resin at an appropriate timing.
- the intermediate layer resin is covered with the inner and outer resin layers by using the same material as the inner and outer layer resin, so that the intermediate layer resin is intermittently present.
- a continuous molten resin is extruded from the die lip 17 and cut at a location where the intermediate layer resin does not exist, so that the intermediate layer resin is encapsulated in the inner and outer layers of the resin. Can be formed.
- the multilayer molten resin lump extruder 20 shown in Fig. 3 is, like the extruder shown in Fig. 2, an inner and outer layer resin extruder, an intermediate layer resin extruder and an intermediate layer cutting resin.
- An extruder is provided, and the die is provided with an inner / outer layer resin passage 21a, an intermediate layer resin passage 21b, and an intermediate layer cutting resin passage 21c which communicate with the extruders.
- the passages meet at an extrusion passage 22.
- a valve mechanism for opening and closing the respective outlets of the intermediate layer resin passage 21b and the intermediate layer cutting resin passage 21c. 23b and 23c are provided.
- FIGS. 3 (a) to 3 (d) show a combined form of opening and closing each valve.
- the intermediate layer resin is intermittently extruded by intermittently opening the extrusion port of the intermediate layer resin passage 21b by the valve mechanism 23b. Press intermittently By discharging, the intermediate layer resin is covered with the inner and outer resin layers, and a multilayer molten resin block is enclosed in the inner and outer layer resins.
- the inner and outer layer resin and the intermediate layer cutting resin are made of the same material, and are intermittently extruded in the extrusion process of the multilayer molten resin mass.
- the shape of the intermediate layer resin in the multilayer molten resin mass can be controlled by adjusting the extrusion timing of the intermediate layer resin and the intermediate layer cutting resin to be extruded. For example, when the intermediate layer resin and the resin for cutting the intermediate layer are simultaneously discharged, the intermediate layer resin becomes convex, and when sequentially discharged, the intermediate layer resin becomes concave.
- each layer is made of the following resin, and the intermediate layer resin 31 has a concave shape as shown in Fig. 4 (a).
- Fat mass 30 was obtained.
- the obtained multilayer molten resin mass is compression-molded to form a bottomed preform for bottle molding, and as shown in Fig. 5, a cross section is cut at an interval of 10 mm from below the neck to below the neck in the axial direction, and the periphery is cut.
- the thickness of the innermost layer, intermediate layer, and outermost layer in each direction was measured, and the layer distribution was examined. The results are shown in Figs. Fig.
- FIG. 6 shows the distribution of the thickness of the innermost layer in the circumferential direction at positions 30mm and 50mm below the neck
- Fig. 7 shows the distribution of the thickness of the intermediate layer in the circumferential direction at positions 30mm and 50mm below the neck
- Figure 8 shows the change in the thickness of the innermost layer, middle layer, and outermost layer at 10 mm intervals in the axial direction, and the layer thickness at each position is the circumferential thickness at that height position. Shown as the average value.
- Intermediate layer resin Recycled polyester resin (PCR) (manufactured by Yono Pet Recycle Co., Ltd.)
- Multi-layer molten lump length Z 66mm
- Middle layer resin center length L 9.4mm Distance from lower end to middle layer resin lower end t: 2.lmm
- Multi-layer molten resin mass outer diameter D 22.9 mm
- the thickness distribution of the innermost layer is clearly shown in FIG. 6, and in the case of the embodiment, the innermost layer has a thickness of 0.8 mm or more at 30 mm below the neck and 0.6 mm or more at 50 mm below the neck. Thickness is ensured, and there is little variation in the circumferential direction.
- the comparative example there are only 0.55 mm at 30 mm below the neck and only 0.45 mm at 50 mm below the neck, and it is not possible to secure a sufficient innermost layer thickness, and there is also a variation in the circumferential direction. Is also big.
- the intermediate layer as shown in FIG.
- the thickness distribution of the innermost layer, the intermediate layer and the outermost layer at intervals of 10mm below the neck in the axial direction of the preform is as follows.
- the dispersion of the most important intermediate layer and the innermost layer is small, and both layers have a thickness of 0.6 mm or more. Therefore, there is little possibility that the above-mentioned problems will occur.
- the dispersion between the intermediate layer and the innermost layer was particularly large, and the thickness of the innermost layer was 0.6 mm or less, especially at the lower part. Not enough thickness is secured. From the above examples, it was confirmed that the multilayer molten resin mass of the present invention is a very effective method for securing a uniform layer thickness and a required layer thickness of a multilayer molded product.
- a container such as a bottle obtained by blow molding a preform obtained by compression-molding the multilayer molten resin mass of the present invention does not have a possibility that the intermediate layer is exposed on the inner surface of the container.
- the content liquid comes into direct contact with the layer and undesirably affects the content liquid. It is possible to obtain a container which is free from the problem that the layer absorbs the moisture of the contents and the barrier integrity is degraded.
- the multilayer molten resin lump of the present invention obtains a multilayer preform for blow molding, which has a substantially uniform layer distribution and ensures an intermediate layer thickness without exposing the intermediate resin layer to the outside.
- a multilayer resin molded article in which the intermediate resin layer is located in the inner and outer resin layers and is uniformly distributed in the circumferential direction is obtained. Therefore, it is useful for forming a multilayer resin container such as a bottle, a multilayer resin cap, or other various multilayer resin molded products.
Abstract
Description
Claims
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/576,414 US20070122578A1 (en) | 2003-10-22 | 2004-10-20 | Multilayered molten resin mass, multilayered preform compression molded from multilayered molten resin mass for blow molding, and multilayered container |
CN2004800311236A CN1871107B (zh) | 2003-10-22 | 2004-10-20 | 多层熔融树脂块及从该多层熔融树脂块来压缩成形的吹塑成形用多层预成形物以及多层容器 |
CA002542906A CA2542906A1 (en) | 2003-10-22 | 2004-10-20 | Multilayered molten resin mass, multilayered preform for blow molding formed from the multilayered molten resin mass by compression molding, and multilayered container |
EP04792672A EP1676687B1 (en) | 2003-10-22 | 2004-10-20 | Multilayered molten resin mass, multilayered preform for blow molding formed from the multilayered molten resin mass by compression molding, and multilayered container |
AU2004283959A AU2004283959B2 (en) | 2003-10-22 | 2004-10-20 | Multilayered molten resin mass, multilayered preform for blow molding formed from the multilayered molten resin mass by compression molding, and multilayered container |
DE602004022185T DE602004022185D1 (de) | 2003-10-22 | 2004-10-20 | Mehrlagige harzschmelzenmasse, aus der mehrlagigen harzschmelzenmasse durch formpressen geformter mehrschichtiger vorformling zum blasformen und mehrlagiger behälter |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2003361584A JP4240221B2 (ja) | 2003-10-22 | 2003-10-22 | 多層溶融樹脂塊 |
JP2003-361584 | 2003-10-22 |
Publications (1)
Publication Number | Publication Date |
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WO2005039855A1 true WO2005039855A1 (ja) | 2005-05-06 |
Family
ID=34509949
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2004/015506 WO2005039855A1 (ja) | 2003-10-22 | 2004-10-20 | 多層溶融樹脂塊及び該多層溶融樹脂塊から圧縮成形されたブロー成形用多層予備成形物並びに多層容器 |
Country Status (9)
Country | Link |
---|---|
US (1) | US20070122578A1 (ja) |
EP (1) | EP1676687B1 (ja) |
JP (1) | JP4240221B2 (ja) |
KR (1) | KR101041416B1 (ja) |
CN (1) | CN1871107B (ja) |
AU (1) | AU2004283959B2 (ja) |
CA (1) | CA2542906A1 (ja) |
DE (1) | DE602004022185D1 (ja) |
WO (1) | WO2005039855A1 (ja) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1757421A1 (fr) * | 2005-08-22 | 2007-02-28 | Aisapack Holding SA | Préforme multicouche et méthode de réalisation |
US8765038B2 (en) * | 2006-04-27 | 2014-07-01 | Toyo Seikan Kaisha, Ltd. | Method of feeding composite molten resin and apparatus for feeding the same |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4442325B2 (ja) | 2004-05-31 | 2010-03-31 | 東洋製罐株式会社 | 多層構造体の製造方法 |
JP5131580B2 (ja) * | 2007-01-05 | 2013-01-30 | 大日本印刷株式会社 | 溶融樹脂材料成形装置、溶融樹脂材料成形方法、多層プリフォーム用樹脂塊、および多層プリフォーム用樹脂塊を用いて成形された多層プリフォーム |
EP1955835A1 (fr) * | 2007-02-07 | 2008-08-13 | Aisapack Holding SA | Méthode de réalisation d'un objet multicouche |
ITMO20070398A1 (it) * | 2007-12-20 | 2009-06-21 | Sacmi | Metodi e apparati per stampare a compressione oggetti multistrato, relative dosi e oggetto multistrato |
IT201900018530A1 (it) * | 2019-10-11 | 2021-04-11 | Sacmi | Apparato e metodo per ottenere dosi multistrato. |
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 |
Citations (2)
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JPH03234604A (ja) * | 1990-02-13 | 1991-10-18 | Kuwabara Yasunaga | 圧縮成形方法 |
JP2003033964A (ja) * | 2001-07-26 | 2003-02-04 | Toyo Seikan Kaisha Ltd | 多層ボトル |
Family Cites Families (6)
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JPH0741907B2 (ja) * | 1986-12-27 | 1995-05-10 | 三菱瓦斯化学株式会社 | 多層容器 |
JPH02134222A (ja) * | 1988-11-15 | 1990-05-23 | Ueno Hiroshi | 圧縮成形方法 |
US5759653A (en) * | 1994-12-14 | 1998-06-02 | Continental Pet Technologies, Inc. | Oxygen scavenging composition for multilayer preform and container |
JP2000326393A (ja) * | 1999-05-18 | 2000-11-28 | Showa Denko Kk | 多層ボトル、そのプリフォーム及びそれらの製造方法 |
JP2002248675A (ja) | 2001-02-23 | 2002-09-03 | Toyo Seikan Kaisha Ltd | 多層プリフォーム及びそのの製造方法 |
JP4239436B2 (ja) | 2001-05-23 | 2009-03-18 | 東洋製罐株式会社 | 多層プリフォーム及びそれを用いた多層ボトル |
-
2003
- 2003-10-22 JP JP2003361584A patent/JP4240221B2/ja not_active Expired - Lifetime
-
2004
- 2004-10-20 US US10/576,414 patent/US20070122578A1/en not_active Abandoned
- 2004-10-20 KR KR1020067007493A patent/KR101041416B1/ko active IP Right Grant
- 2004-10-20 EP EP04792672A patent/EP1676687B1/en not_active Expired - Fee Related
- 2004-10-20 WO PCT/JP2004/015506 patent/WO2005039855A1/ja active Application Filing
- 2004-10-20 CA CA002542906A patent/CA2542906A1/en not_active Abandoned
- 2004-10-20 DE DE602004022185T patent/DE602004022185D1/de active Active
- 2004-10-20 CN CN2004800311236A patent/CN1871107B/zh not_active Expired - Fee Related
- 2004-10-20 AU AU2004283959A patent/AU2004283959B2/en not_active Ceased
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
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JPH03234604A (ja) * | 1990-02-13 | 1991-10-18 | Kuwabara Yasunaga | 圧縮成形方法 |
JP2003033964A (ja) * | 2001-07-26 | 2003-02-04 | Toyo Seikan Kaisha Ltd | 多層ボトル |
Non-Patent Citations (1)
Title |
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See also references of EP1676687A4 * |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1757421A1 (fr) * | 2005-08-22 | 2007-02-28 | Aisapack Holding SA | Préforme multicouche et méthode de réalisation |
WO2007023428A3 (fr) * | 2005-08-22 | 2007-06-07 | Aisapack Holding Sa | Preforme multicouche et methode de realisation |
US8765038B2 (en) * | 2006-04-27 | 2014-07-01 | Toyo Seikan Kaisha, Ltd. | Method of feeding composite molten resin and apparatus for feeding the same |
Also Published As
Publication number | Publication date |
---|---|
AU2004283959A1 (en) | 2005-05-06 |
CN1871107B (zh) | 2010-05-12 |
CA2542906A1 (en) | 2005-05-06 |
EP1676687A4 (en) | 2006-11-15 |
US20070122578A1 (en) | 2007-05-31 |
JP4240221B2 (ja) | 2009-03-18 |
EP1676687B1 (en) | 2009-07-22 |
DE602004022185D1 (de) | 2009-09-03 |
JP2005125532A (ja) | 2005-05-19 |
KR20060123121A (ko) | 2006-12-01 |
EP1676687A1 (en) | 2006-07-05 |
CN1871107A (zh) | 2006-11-29 |
AU2004283959B2 (en) | 2010-04-29 |
KR101041416B1 (ko) | 2011-06-15 |
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