WO2008026437A1 - Multilayered blow container and method of forming the same - Google Patents
Multilayered blow container and method of forming the same Download PDFInfo
- Publication number
- WO2008026437A1 WO2008026437A1 PCT/JP2007/065588 JP2007065588W WO2008026437A1 WO 2008026437 A1 WO2008026437 A1 WO 2008026437A1 JP 2007065588 W JP2007065588 W JP 2007065588W WO 2008026437 A1 WO2008026437 A1 WO 2008026437A1
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- Prior art keywords
- layer
- region
- intermediate layer
- pinch
- range
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- 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
- B65D1/0207—Bottles or similar containers with necks or like restricted apertures, designed for pouring contents characterised by material, e.g. composition, physical features
- B65D1/0215—Bottles or similar containers with necks or like restricted apertures, designed for pouring contents characterised by material, e.g. composition, physical features multilayered
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- 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
- B29C49/04—Extrusion blow-moulding
- B29C49/0411—Means for defining the wall or layer thickness
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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
- B29C49/071—Preforms or parisons characterised by their configuration, e.g. geometry, dimensions or physical properties
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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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B1/00—Layered products having a non-planar shape
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/34—Layered products comprising a layer of synthetic resin comprising polyamides
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
- B32B3/02—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by features of form at particular places, e.g. in edge regions
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
- B32B3/02—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by features of form at particular places, e.g. in edge regions
- B32B3/04—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by features of form at particular places, e.g. in edge regions characterised by at least one layer folded at the edge, e.g. over another layer ; characterised by at least one layer enveloping or enclosing a material
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- 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
- B65D23/00—Details of bottles or jars not otherwise provided for
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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
- B29C2049/222—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor using multilayered preforms or parisons only parts of the preforms or parisons are layered
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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
- B29C2949/20—Preforms or parisons whereby a specific part is made of only one component, e.g. only one layer
-
- 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
- B29C2949/3004—Preforms or parisons made of several components having longitudinally different components within one layer, e.g. tubes with longitudinal stratified layering
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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
- B29C2949/3006—Preforms or parisons made of several components having tangentially different components within one layer, e.g. longitudinal stripes
-
- 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
- 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
- B29C49/04—Extrusion blow-moulding
- B29C49/041—Extrusion blow-moulding using an accumulator head
-
- 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
- B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material
- B29K2023/04—Polymers of ethylene
- B29K2023/06—PE, i.e. polyethylene
- B29K2023/0608—PE, i.e. polyethylene characterised by its density
- B29K2023/065—HDPE, i.e. high density polyethylene
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- 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
- B29K2077/00—Use of PA, i.e. polyamides, e.g. polyesteramides or derivatives thereof, as moulding material
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- 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
- B29L2022/00—Hollow articles
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- 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
- B29L2031/00—Other particular articles
- B29L2031/712—Containers; Packaging elements or accessories, Packages
- B29L2031/7158—Bottles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2250/00—Layers arrangement
- B32B2250/24—All layers being polymeric
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2250/00—Layers arrangement
- B32B2250/40—Symmetrical or sandwich layers, e.g. ABA, ABCBA, ABCCBA
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2270/00—Resin or rubber layer containing a blend of at least two different polymers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2272/00—Resin or rubber layer comprising scrap, waste or recycling material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/50—Properties of the layers or laminate having particular mechanical properties
- B32B2307/54—Yield strength; Tensile strength
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2439/00—Containers; Receptacles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2439/00—Containers; Receptacles
- B32B2439/40—Closed containers
- B32B2439/60—Bottles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2439/00—Containers; Receptacles
- B32B2439/70—Food packaging
Definitions
- the present invention relates to a synthetic resin multilayer blow container formed by a direct blow molding method and using a recycled material as an intermediate layer.
- Patent Document 1 describes an invention related to a multilayer blow container using a recycled plastic material as an intermediate layer in a blow molded multilayer plastic bottle
- Patent Document 2 describes such an invention.
- An invention relating to a die for multilayer blow molding used for multilayer blow molding is described.
- Conventionally from the viewpoint of cost reduction and resource saving, it has been widely used to recover burrs and defective products generated in the manufacturing process and to use recycled materials, so-called recycled materials, as materials for intermediate layers of multilayer containers. ing.
- Patent Document 1 JP-A-5-338638
- Patent Document 2 Japanese Patent Laid-Open No. 10-128836
- this type of multi-layer blow container uses the same synthetic resin purged material for the outer layer and the inner layer, and the intermediate layer is made of a recycled material mainly composed of the synthetic resin used for the inner and outer layers. Use.
- the vicinity of the upper end surface of the mouth tube portion is a portion that requires high dimensional accuracy from the viewpoint of sealing performance, such as a cap, and the bottom portion has a pinch-off portion that is welded with a flat parison and has a drop impact, etc.
- the sealing performance of the mouth tube portion or the strength of the pin-off portion is unavoidable due to the presence of the intermediate layer.
- the present invention was devised to solve the above-described problems in the prior art, and the exposure of the recycled material in the mouth tube portion due to the increase in the usage rate of the recycled material, the pinch-off portion, and the like. It is an object to effectively prevent a decrease in performance as a container, such as a decrease in strength. Means for solving the problem
- the means of the invention according to claim 1 comprises:
- a multilayer blow container formed by blow molding of an extruded cylindrical multilayer nylon, having a mouth tube portion, a shoulder portion, a body portion and a bottom portion, and formed from at least an outer layer, an inner layer and one intermediate layer.
- the outer layer and the inner layer are formed of the same synthetic resin, and the intermediate layer is formed of a recycled material mainly composed of the synthetic resin forming the inner and outer layers;
- a non-formation region without an intermediate layer in a predetermined range or a thin layer region in which the intermediate layer is thinner than other parts is formed along the direction of extrusion of the NORSON.
- the part such as the bottom part a non-formation area without an intermediate layer or a thin layer area in which the intermediate layer is made thinner than other parts, performance degradation can be effectively prevented.
- the non-formation area and the thin layer area are limited to a limited range, and the layer thickness of the recycled material is sufficiently increased in the remaining part, so that the usage rate of the recycled material as a whole container is raised to a high level. Hold by holding power.
- the non-formation region and the thin layer region in the container have a predetermined height range by blocking the flow of the synthetic resin in the intermediate layer flow path or reducing the flow rate at a predetermined timing. That is, it can be formed by blow molding a multi-layer parison in which a non-formed region or a thin layer region is formed in a predetermined range along the extrusion direction. From this point of view, in claim 1, the description relating to the range in which the non-formation region and the thin layer region relating to the container are formed is referred to as “within a predetermined range along the extrusion direction of the parison”.
- the phrase “within a predetermined range along the extrusion direction of the reson” corresponds to, for example, the description “within a predetermined height range” in the mouth tube portion, the shoulder portion, and the body portion, and “in a predetermined range in the bottom portion”. This corresponds to the description “in a predetermined range along a direction perpendicular to the welded surface”.
- the formation of the non-formed region and the thin layer region is not limited to one place.
- the non-formed region and the thin layer region are formed at a plurality of places such as two places near the upper end portion of the mouth tube portion and the pinch-off portion at the bottom portion. That's it.
- the upper end portion of the mouth tube portion needs to be a non-forming region, and in the case of a pinch-off portion, for example, the amount of mixed different resins is small and the adhesion to the inner and outer layers is low. If it does not decrease remarkably, the use of the thin layer region is advantageous in that the usage rate of the intermediate layer can be increased.
- the means of the invention described in claim 2 is that, in the invention described in claim 1, the thin layer region is a gradation region related to the layer thickness obtained by gradually reducing the layer thickness of the intermediate layer.
- the intermediate layer is cut off as in the non-formed region, or when the layer thickness is sharply reduced in a step shape in the thin layer region, if there is a large difference in physical properties between the virgin material and the recycled material, the step is This is a force that causes problems such as reduced dimensional accuracy, reduced blow moldability, etc. Occurrence can be suppressed.
- a non-formation area is formed through a gradation area.
- the influence of the intermediate layer can be suppressed, the dimensional accuracy at the upper end portion of the mouth tube portion including the upper end surface can be increased, and the sealing performance by the cap or the like can be maintained well.
- the means of the invention of claim 4 is the multilayer blow container of claim 3, wherein the height range of the non-formation region is 2 mm or more in the invention of claim 3.
- the height range of the non-formed area slightly reduces the usage rate of recycled material.
- the means of the invention of claim 5 resides in that, in the invention of claim 1, the vicinity of the pinch-off portion at the bottom is a non-formation region.
- the pinch-off part can be as strong as a single-layer blow container.
- the means of the invention described in claim 6 is that, in the invention described in claim 5, the non-forming region is a range of at least 5 mm from the welding surface of the pinch-off portion.
- the non-formation region is at least 5 mm from the weld surface, more preferably at least 10 mm, thereby affecting the strength of the pinch-off portion of the intermediate layer. Can be eliminated.
- the means of the invention according to claim 7 is that, in the invention according to claim 1, the vicinity of the pinch-off portion at the bottom is a thin layer region.
- the vicinity of the pinch-off portion is not necessarily the non-forming region.
- the strength can be sufficiently secured by forming a thin layer region that is not necessary.
- the means of the invention described in claim 8 is that, in the invention described in claim 7, a range from the welding surface of the pinch-off portion to at least 10 mm is defined as the thin layer region.
- the influence of the intermediate layer on the strength of the pinch-off portion is obtained by setting the range of at least 10 mm from the weld surface of the pinch-off portion, more preferably the range of 15 mm or more as the thin layer region. Can be sufficiently eliminated, and the allowable range for alignment of the thin layer region can be increased, so that the molding of Norison and the blow molding of the container can be carried out with a margin.
- the means of the invention according to claim 9 is the invention according to claim 7 or 8, wherein the composition ratio related to the layer thickness of the intermediate layer in the vicinity of the welding surface of the thin layer region is in the range of 0.5 or less. ,It is in.
- the means of the invention described in claim 10 is the portion of the invention described in claim 1, 2, 3, 4, 5, 6, 7, 8, or 9 except for a non-formation region or a thin layer region.
- the composition related to the thickness of the intermediate layer is in the range of 0.3 to 0.9.
- the intermediate layer that does not impair blow moldability can be reliably covered with the inner and outer layers.
- the invention of claim 11 relates to the method for forming a multilayer blow container of the invention of claims 10 to 10 described above, and the method of the invention of claim 11 comprises the following (1) to (3) three It consists of the elements.
- At least three annular layer formation channels arranged in this order from the inside to the inner layer channel, intermediate layer channel, and outer layer channel, and located downstream of this layer formation channel via a confluence A multi-layer extrusion die with a combined flow path is used.
- each resin is supplied in a molten state directly from an extruder or via an accumulator to each layer formation channel via a supply channel.
- This adjustment can be performed, for example, by controlling the valve mechanism such as a ball valve or sprue valve attached to the supply flow path or the shutter mechanism, or by adjusting the discharge pressure using an extruder, accumulator, etc. It can also be changed.
- the method of blocking the flow of the intermediate layer and the method of adjusting the flow rate are not limited to the above-described means, and various means conventionally employed can be applied. The invention's effect
- the non-formation region and the thin layer region related to the intermediate layer are arranged in a predetermined range in which the performance as the container is deteriorated due to the presence of the intermediate layer.
- the gradation region in which the layer thickness is gradually decreased is gradually decreased and By doing so, it is possible to alleviate the problem of deformation and non-uniformity of the blow moldability caused by abruptly changing the layer thickness of the intermediate layer.
- the reclaimed material is exposed on the upper end surface of the mouth tube portion even if trimming is performed. It can be used with peace of mind in the field of food without concern.
- the vicinity of the pinch-off portion formed by flattening and heat-welding the cylindrical parison is formed by setting the vicinity of the pinch-off portion at the bottom as a non-forming region. Since there is no intermediate layer, it is possible to effectively prevent a reduction in the strength of the pinch-off portion due to the use of recycled material.
- the non-forming region is in the range of at least 5mm from the weld surface, more preferably in the range of 10mm, thereby affecting the strength of the pinch-off portion of the intermediate layer. Can be eliminated.
- the vicinity of the pinch-off portion is not necessarily a non-forming region. Therefore, it is possible to effectively prevent a decrease in the strength of the pinch-off portion due to the use of recycled material.
- the intermediate layer relating to the strength of the pinch-off portion is formed by making the range of at least 10 mm from the welding surface of the pinch-off portion, more preferably the range of 15 mm or more as the thin layer region. Can be sufficiently eliminated, and the tolerance for alignment of the thin layer area during molding can be increased, and Norison molding and container blow molding can be performed with a margin. it can.
- the composition ratio related to the layer thickness of the intermediate layer in the vicinity of the welding surface of the thin layer region to be in the range of 0.5 or less, the intermediate related to the strength of the pinch-off portion. The influence of the layer can be suppressed.
- the invention according to claim 10 in the non-formation region or the portion excluding the thin layer region, in the non-formation region or the portion excluding the thin layer region.
- the usage rate of recycled materials can be sufficiently increased, and by ensuring the thickness of the inner and outer layers to 0.9 or less, The intermediate layer which does not impair blow moldability can be reliably covered with the inner and outer layers.
- the invention according to claim 11 relates to a method for forming a multilayer blow container, and the parison is formed into an intermediate layer by adjusting a discharge pressure of a valve, an extruder or an accumulator disposed in a flow path of the intermediate layer material.
- Such a non-formed region or a thin layer region can be formed, and the non-formed region or the thin layer region is pinched off and blow-molded in a state of being opposed to a predetermined height position of the blow mold. According to the above, it is possible to use the force for forming the container described in claims 1 to 10 above. Brief Description of Drawings
- FIG. 1 A front view of the container of the present invention, partially broken away.
- FIG. 2 is an explanatory view showing the other three examples of the mouth tube section in a longitudinal manner.
- FIG. 5 is a schematic explanatory diagram of an example of the molding method of the present invention.
- FIG. 1 is a partially cutaway front view showing an embodiment of a multilayer blow container of the present invention.
- This container 1 has a cylindrical mouth tube part 2, a shoulder part 3, a trunk part 4, and a bottom part 5. Is the body.
- the container 1 is formed of an outer layer 11, an inner layer 12, and an intermediate layer 13.
- the outer layer 11 and the inner layer 12 are made of high-density polyethylene resin
- the intermediate layer 13 is a recycled material mainly composed of high-density polyethylene resin. It is made of a material and contains a small amount of different types of resin such as nylon resin.
- composition ratio related to the layer thickness of 13 and the inner layer 12 is 0.15: 0.7: 0.15 on average.
- the upper end of the mouthpiece 2 and the vicinity of the pinch-off part 6 of the bottom 5 are the intermediate layer 13! / [0047]
- the height range h of the non-forming region N at the upper end of the mouth tube portion 2 is 3 mm
- the upper end surface of the mouth tube portion 2 is flat
- this upper end surface is the sealing surface.
- the upper end surface is trimmed into a cut shape in post-processing, If the height range of the non-formed area N is about 3 mm, the intermediate layer 13 will not be exposed by cutting the upper end surface, so trimmer finishing can be performed with confidence, and it can also be used with confidence in food applications. That's the power S.
- the height range of the non-formed region N is set to 3 mm.
- the height range of the non-formed region N needs to be 2 mm or more from the viewpoint of exposing the intermediate layer 13 by post-processing.
- FIG. 2 is an explanatory view showing three other examples of the mouthpiece portion 2 in a longitudinal section.
- a force cap showing the so-called top seal type mouth tube portion 2 with the upper end surface as the seal surface, or various shapes and seal type mouth tube portions 2 are employed in combination with an inner plug. It is necessary to determine the range of the non-forming region N according to the type.
- Fig. 2 (a) shows a type in which the inner peripheral surface is sealed with a trimmer finish by a drill in the height range hi of the upper end portion of the mouth tube portion 2, and in this case, the lower end of the height range hi Therefore, the non-formation region N is defined including the height range h2 of 2 mm or more.
- Fig. 2 (b) is a type in which the inner peripheral surface is sealed with a trimmer finish in the entire height range hi of the mouth tube part 2, and the force S that makes the substantially full height of the mouth tube part 2 the non-forming region N
- the thickness t is set to 2 mm or more in consideration of the allowance in the radial direction.
- FIG. 2 (c) shows the opening diameter reduced at the upper end of the mouth tube part 2, and the inner peripheral surface is trimmed in the height range hi of the reduced diameter part.
- the range r of the non-forming region N in the vicinity of the pinch-off portion 6 of the bottom portion 5 is set to about 10 mm from the welding surface 6a of the pinch-off portion 6 to the left and right, and in the vicinity of the welding surface 6a Since the layer 13 is completely! /, The strength 13 can be obtained without being affected by the intermediate layer 13! (See the enlarged view near pinch-off part 6 in Fig. 1)
- the range r of the non-forming region N is set to 10 mm from the welding surface 6a to the left and right respectively. In consideration of the influence of the intermediate layer 13 on the force S and the strength of the pinch-off part 6 in the range of the above, and the alignment of the parison to the mold pinch-off part in the professional molding described later, at least 5 mm is necessary.
- FIG. 3 is an explanatory view showing another layer configuration example in the vicinity of the pinch-off portion 6 in a longitudinal section.
- This is an example in which, instead of the non-formation region N, a thin layer region F, particularly a gradation region G in which the layer thickness of the intermediate layer 13 is gradually reduced, is arranged in the vicinity of the pinch-off portion 6.
- the intermediate layer 13 does not directly touch the contents, and thus the intermediate layer 13 can be configured as long as the strength of the pinch-off portion 6 is ensured.
- a gradation region G when extruding a multilayer parison, such a gradation region G can be formed relatively easily without the need for blocking the flow of the intermediate layer or abrupt adjustment of the flow rate. This is advantageous from the viewpoint of productivity. Further, in the vicinity of the welding surface 6a, the thickness of the intermediate layer 13 can be made extremely thin, which is advantageous from the viewpoint of the strength of the pinch-off portion 6.
- the formation range r of the thin film region F (gradation region G) is in the range of 20 mm from the welded surface 6a, and the average thickness is the composition ratio of the intermediate layer 13 in this range.
- the formation range r of the thin film region F needs to be at least 10 mm, and more preferably 15 mm or more.
- the composition ratio of the intermediate layer 13 needs to be 0.5 or less.
- FIG. 4 is an explanatory view showing the layer structure in the vicinity of the pinch-off portion 6 in a conventional container in a longitudinal section. Since the pinch-off part 6 is a part where the parison is pressed flat and welded, relatively large internal stress acts after molding with a large residual strain, and when the container is dropped, the welding surface 6a is peeled off. A large force acts in any direction.
- the thick intermediate layer 13 is adjacent to the weld surface 6a where the inner layers 12 are welded to each other while the composition ratio relating to the layer thickness is about 0.7. If the adhesion between the intermediate layer 13 and the inner layer 12 is low due to oxidative degradation or mixing of different types of resin, the intermediate layer and the force accompanying the fall Peeling occurs at the interface between 13 and the inner layer 12, and the strength of the pinch-off portion 6 decreases.
- FIG. 5 is a schematic explanatory view of an example of the molding method of the present invention, which relates to a method for molding the container 1 of FIG. 1, and is for blow molding in an open state.
- Split mold 3 A state in which a cylindrical multilayer 20 is extruded from a die 32 for multilayer extrusion molding during 1 is shown.
- the multilayer parison 20 is formed of an outer layer 21 and an inner layer 22 made of high-density polyethylene resin, and an intermediate layer 23 formed of a recycled material mainly composed of high-density polyethylene resin.
- the non-formation region PN without the intermediate layer 23 is formed in two places, and the mold is closed in a state where each is positioned at a height facing the mouth portion 33 of the split die 31 and the pinch-off portion 34.
- air is blown from the upper-end opening part, so that the upper part of the mouth tube part 2 and the pinch-off part 6 as shown in FIG.
- the container 1 in which the formation region PN is formed can be formed.
- the multilayer parison 20 includes at least three annular layer forming channels disposed in this order from the inner layer channel, the intermediate layer channel, and the outer layer channel, and the layer forming channel. Force that is extruded using a multi-layer extrusion die that has a flow path positioned downstream via a merge point. Flow of the synthetic resin in the intermediate flow path by a valve mechanism or shutter mechanism at a predetermined timing. By blocking, the non-forming region PN can be formed at a position facing the mouth portion 33 and the pinch-off portion 34 of the split mold 31 as described above.
- the intermediate layer 23 is formed in a predetermined height range of the multilayer parison 20.
- a thinned thin layer region can be formed, and this thin layer region can be a gradation region in which the thickness of the intermediate layer 23 is gradually reduced.
- the synthetic resin used is not limited to high-density polyethylene, and a resin conventionally used for blow molding can be used.
- Another intermediate layer such as a resin layer having a high gas barrier property may be laminated.
- the multilayer blow container of the present invention is as described above, and is associated with the use of recycled materials.
- the usage rate of recycled material can be increased without worrying about exposure of the recycled material at the mouth tube and a decrease in the strength of the pinch-off part, and a wide range of applications can be developed from the viewpoint of cost reduction and resource saving.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Ceramic Engineering (AREA)
- Physics & Mathematics (AREA)
- Geometry (AREA)
- Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
- Containers Having Bodies Formed In One Piece (AREA)
Description
Claims
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA2661690A CA2661690C (en) | 2006-08-31 | 2007-08-09 | Multi-layered, blow molded container and process for molding the same |
| AU2007289914A AU2007289914B2 (en) | 2006-08-31 | 2007-08-09 | Multilayered blow container and method of forming the same |
| KR1020087020041A KR101410529B1 (ko) | 2006-08-31 | 2007-08-09 | 다층 블로우 용기 및 그 성형방법 |
| EP07805918A EP2065163B1 (en) | 2006-08-31 | 2007-08-09 | Multilayered blow container and method of forming the same |
| US12/310,230 US8061540B2 (en) | 2006-08-31 | 2007-08-09 | Multi-layered, blow molded container and process for molding the same |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2006-237013 | 2006-08-31 | ||
| JP2006237013A JP4771315B2 (ja) | 2006-08-31 | 2006-08-31 | 多層ブロー容器 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2008026437A1 true WO2008026437A1 (en) | 2008-03-06 |
Family
ID=39135723
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP2007/065588 Ceased WO2008026437A1 (en) | 2006-08-31 | 2007-08-09 | Multilayered blow container and method of forming the same |
Country Status (8)
| Country | Link |
|---|---|
| US (1) | US8061540B2 (ja) |
| EP (1) | EP2065163B1 (ja) |
| JP (1) | JP4771315B2 (ja) |
| KR (1) | KR101410529B1 (ja) |
| CN (1) | CN101378888A (ja) |
| AU (1) | AU2007289914B2 (ja) |
| CA (1) | CA2661690C (ja) |
| WO (1) | WO2008026437A1 (ja) |
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| JP2003220641A (ja) * | 2002-01-29 | 2003-08-05 | Yoshino Kogyosho Co Ltd | 二軸延伸ブロー成形壜体及びその一次成形品 |
| KR101277925B1 (ko) * | 2008-06-30 | 2013-06-27 | 가부시키가이샤 요시노 고교쇼 | 합성수지제 적층 병체, 사출성형장치 및 적층 프리폼의 성형방법 |
| JP5387054B2 (ja) * | 2009-03-03 | 2014-01-15 | 東洋製罐株式会社 | 耐落下衝撃性に優れた多層プラスチック容器 |
| GB2478732B (en) * | 2010-03-15 | 2014-08-20 | Kraft Foods R & D Inc | Improvements in injection moulding |
| JP5392658B2 (ja) * | 2010-03-31 | 2014-01-22 | 株式会社吉野工業所 | 積層ブロー壜体 |
| AU2012363114B2 (en) | 2011-06-17 | 2016-10-06 | Berry Plastics Corporation | Insulated sleeve for a cup |
| JP5765656B2 (ja) * | 2011-10-31 | 2015-08-19 | 株式会社吉野工業所 | プリフォームの射出成形装置 |
| US8893908B2 (en) * | 2012-08-03 | 2014-11-25 | Eastman Chemical Company | Extrusion blow molding system having enhanced pinch geometry |
| JP6011929B2 (ja) | 2012-10-31 | 2016-10-25 | 株式会社吉野工業所 | 2軸延伸ブロー成形容器及びその製造方法 |
| US9221204B2 (en) * | 2013-03-14 | 2015-12-29 | Kortec, Inc. | Techniques to mold parts with injection-formed aperture in gate area |
| JP2016518289A (ja) | 2013-03-14 | 2016-06-23 | ベリー プラスチックス コーポレイション | 容器 |
| EP2783829B1 (en) * | 2013-03-29 | 2016-10-19 | Inergy Automotive Systems Research (Société Anonyme) | Process for manufacturing a hollow body |
| JP6061250B2 (ja) * | 2013-06-28 | 2017-01-18 | 株式会社吉野工業所 | 合成樹脂製窓付き容器、プリフォーム及びプリフォームの射出成形方法 |
| EP3019552A4 (en) | 2013-07-12 | 2017-02-22 | Berry Plastics Corp. | Polymeric material for container |
| EP3033208A4 (en) | 2013-08-16 | 2017-07-05 | Berry Plastics Corp. | Polymeric material for an insulated container |
| CA2917818A1 (en) | 2013-08-26 | 2015-03-05 | Berry Plastics Corporation | Polymeric material for container |
| TW201536527A (zh) | 2013-08-30 | 2015-10-01 | Berry Plastics Corp | 多層管以及其製造方法 |
| CN104015993A (zh) * | 2014-06-10 | 2014-09-03 | 卓高泰(广州)包装有限公司 | 高阻隔密封容器 |
| US9937652B2 (en) | 2015-03-04 | 2018-04-10 | Berry Plastics Corporation | Polymeric material for container |
| JP6808339B2 (ja) * | 2016-03-31 | 2021-01-06 | 株式会社吉野工業所 | 積層剥離容器及びプリフォーム |
| JP6653967B2 (ja) * | 2016-05-27 | 2020-02-26 | 株式会社吉野工業所 | 調湿容器 |
| DE102017200959A1 (de) * | 2016-12-09 | 2018-06-14 | Aktiebolaget Skf | Bauteil und Verfahren zum Herstellen eines Bauteils |
| EP3470195B1 (en) | 2017-10-12 | 2026-04-29 | The Procter & Gamble Company | Blow molded article with visual effects, preform, method |
| DE102018000233A1 (de) * | 2018-01-15 | 2019-07-18 | Georg Menshen Gmbh & Co. Kg | Behälterverschluss |
| JP2020192998A (ja) * | 2019-05-28 | 2020-12-03 | 株式会社吉野工業所 | 押出ブロー成形容器 |
| WO2021142194A1 (en) * | 2020-01-08 | 2021-07-15 | The Procter & Gamble Company | Blow molded multilayer article with color gradient |
| JP7566130B2 (ja) * | 2021-03-09 | 2024-10-11 | 積水成型工業株式会社 | 樹脂容器 |
| US20240270433A1 (en) * | 2021-06-08 | 2024-08-15 | PAPACKS SALES GmbH | Molded product with connection element |
| JP7815804B2 (ja) * | 2022-01-31 | 2026-02-18 | メビウスパッケージング株式会社 | 再生樹脂製ダイレクトブロー容器 |
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- 2007-08-09 US US12/310,230 patent/US8061540B2/en not_active Expired - Fee Related
- 2007-08-09 KR KR1020087020041A patent/KR101410529B1/ko not_active Expired - Fee Related
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Also Published As
| Publication number | Publication date |
|---|---|
| KR101410529B1 (ko) | 2014-06-20 |
| AU2007289914B2 (en) | 2011-11-03 |
| JP2008055808A (ja) | 2008-03-13 |
| CA2661690C (en) | 2015-04-28 |
| EP2065163B1 (en) | 2012-06-13 |
| US8061540B2 (en) | 2011-11-22 |
| EP2065163A1 (en) | 2009-06-03 |
| CN101378888A (zh) | 2009-03-04 |
| KR20090052831A (ko) | 2009-05-26 |
| CA2661690A1 (en) | 2008-03-06 |
| US20090230074A1 (en) | 2009-09-17 |
| AU2007289914A1 (en) | 2008-03-06 |
| JP4771315B2 (ja) | 2011-09-14 |
| EP2065163A4 (en) | 2010-06-02 |
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