EP2547506A1 - Hohlkörper mit verbesserter barrierewirkung - Google Patents
Hohlkörper mit verbesserter barrierewirkungInfo
- Publication number
- EP2547506A1 EP2547506A1 EP11707875A EP11707875A EP2547506A1 EP 2547506 A1 EP2547506 A1 EP 2547506A1 EP 11707875 A EP11707875 A EP 11707875A EP 11707875 A EP11707875 A EP 11707875A EP 2547506 A1 EP2547506 A1 EP 2547506A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- layer
- bottles
- preform
- polystyrene
- hollow bodies
- 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.)
- Withdrawn
Links
- 230000004888 barrier function Effects 0.000 title claims abstract description 31
- 230000000694 effects Effects 0.000 title claims abstract description 11
- 239000004793 Polystyrene Substances 0.000 claims abstract description 24
- 229920002223 polystyrene Polymers 0.000 claims abstract description 24
- 238000000034 method Methods 0.000 claims description 18
- 238000001746 injection moulding Methods 0.000 claims description 11
- 229920000098 polyolefin Polymers 0.000 claims description 10
- 229920003048 styrene butadiene rubber Polymers 0.000 claims description 10
- 230000008569 process Effects 0.000 claims description 8
- 238000000071 blow moulding Methods 0.000 claims description 4
- 238000010103 injection stretch blow moulding Methods 0.000 claims description 4
- 238000007493 shaping process Methods 0.000 claims 1
- 238000013016 damping Methods 0.000 abstract 1
- 229920000642 polymer Polymers 0.000 description 17
- 239000004743 Polypropylene Substances 0.000 description 13
- 229920005669 high impact polystyrene Polymers 0.000 description 12
- 239000004797 high-impact polystyrene Substances 0.000 description 12
- 239000000203 mixture Substances 0.000 description 12
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 10
- 238000007664 blowing Methods 0.000 description 10
- -1 polyethylene Polymers 0.000 description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 9
- 230000000052 comparative effect Effects 0.000 description 6
- 229920001577 copolymer Polymers 0.000 description 6
- 229920001903 high density polyethylene Polymers 0.000 description 6
- 229920001684 low density polyethylene Polymers 0.000 description 6
- 229920001971 elastomer Polymers 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 239000000155 melt Substances 0.000 description 5
- 239000005060 rubber Substances 0.000 description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- KAKZBPTYRLMSJV-UHFFFAOYSA-N Butadiene Chemical compound C=CC=C KAKZBPTYRLMSJV-UHFFFAOYSA-N 0.000 description 4
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 4
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 4
- 239000005977 Ethylene Substances 0.000 description 4
- 239000004698 Polyethylene Substances 0.000 description 4
- 239000008187 granular material Substances 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 229920000573 polyethylene Polymers 0.000 description 4
- 229920001155 polypropylene Polymers 0.000 description 4
- 229920000089 Cyclic olefin copolymer Polymers 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 239000004700 high-density polyethylene Substances 0.000 description 3
- 239000004702 low-density polyethylene Substances 0.000 description 3
- 239000011159 matrix material Substances 0.000 description 3
- 229920002857 polybutadiene Polymers 0.000 description 3
- RRHGJUQNOFWUDK-UHFFFAOYSA-N Isoprene Chemical compound CC(=C)C=C RRHGJUQNOFWUDK-UHFFFAOYSA-N 0.000 description 2
- 239000005062 Polybutadiene Substances 0.000 description 2
- 229920001328 Polyvinylidene chloride Polymers 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 239000003570 air Substances 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 235000013361 beverage Nutrition 0.000 description 2
- 229920001400 block copolymer Polymers 0.000 description 2
- 230000009172 bursting Effects 0.000 description 2
- 239000001569 carbon dioxide Substances 0.000 description 2
- 229910002092 carbon dioxide Inorganic materials 0.000 description 2
- 235000013365 dairy product Nutrition 0.000 description 2
- 235000013305 food Nutrition 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 229920000092 linear low density polyethylene Polymers 0.000 description 2
- 239000004707 linear low-density polyethylene Substances 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 235000019645 odor Nutrition 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 239000005033 polyvinylidene chloride Substances 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 239000004711 α-olefin Substances 0.000 description 2
- WSSSPWUEQFSQQG-UHFFFAOYSA-N 4-methyl-1-pentene Chemical compound CC(C)CC=C WSSSPWUEQFSQQG-UHFFFAOYSA-N 0.000 description 1
- NLHHRLWOUZZQLW-UHFFFAOYSA-N Acrylonitrile Chemical compound C=CC#N NLHHRLWOUZZQLW-UHFFFAOYSA-N 0.000 description 1
- 239000004709 Chlorinated polyethylene Substances 0.000 description 1
- 239000004716 Ethylene/acrylic acid copolymer Substances 0.000 description 1
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 description 1
- 239000002033 PVDF binder Substances 0.000 description 1
- 239000004952 Polyamide Substances 0.000 description 1
- 229920002367 Polyisobutene Polymers 0.000 description 1
- 239000004372 Polyvinyl alcohol Substances 0.000 description 1
- 239000005862 Whey Substances 0.000 description 1
- 102000007544 Whey Proteins Human genes 0.000 description 1
- 108010046377 Whey Proteins Proteins 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- 229920000800 acrylic rubber Polymers 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 150000001298 alcohols Chemical class 0.000 description 1
- 239000002585 base Substances 0.000 description 1
- 235000015155 buttermilk Nutrition 0.000 description 1
- 235000013339 cereals Nutrition 0.000 description 1
- AIXMJTYHQHQJLU-UHFFFAOYSA-N chembl210858 Chemical compound O1C(CC(=O)OC)CC(C=2C=CC(O)=CC=2)=N1 AIXMJTYHQHQJLU-UHFFFAOYSA-N 0.000 description 1
- 239000002537 cosmetic Substances 0.000 description 1
- 150000001925 cycloalkenes Chemical class 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000032798 delamination Effects 0.000 description 1
- 239000003599 detergent Substances 0.000 description 1
- 150000001993 dienes Chemical class 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 239000008157 edible vegetable oil Substances 0.000 description 1
- 239000000839 emulsion Substances 0.000 description 1
- 229920006228 ethylene acrylate copolymer Polymers 0.000 description 1
- 229920001038 ethylene copolymer Polymers 0.000 description 1
- 238000010101 extrusion blow moulding Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000000796 flavoring agent Substances 0.000 description 1
- 235000019634 flavors Nutrition 0.000 description 1
- 239000002816 fuel additive Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000010102 injection blow moulding Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 235000013336 milk Nutrition 0.000 description 1
- 239000008267 milk Substances 0.000 description 1
- 210000004080 milk Anatomy 0.000 description 1
- 235000020124 milk-based beverage Nutrition 0.000 description 1
- 239000011087 paperboard Substances 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 229920005629 polypropylene homopolymer Polymers 0.000 description 1
- 229920002451 polyvinyl alcohol Polymers 0.000 description 1
- 229920002981 polyvinylidene fluoride Polymers 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 229920005604 random copolymer Polymers 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 235000014214 soft drink Nutrition 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000001954 sterilising effect Effects 0.000 description 1
- 238000004659 sterilization and disinfection Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 229920001897 terpolymer Polymers 0.000 description 1
- 229920002725 thermoplastic elastomer Polymers 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
- 230000004580 weight loss Effects 0.000 description 1
Classifications
-
- 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 general shape other than plane
-
- 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
- B29C49/0005—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor characterised by the material
-
- 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
-
- 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
- B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
-
- 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
- B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
- B32B27/302—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers comprising aromatic vinyl (co)polymers, e.g. styrenic (co)polymers
-
- 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
-
- 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—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, 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
- B29C49/42—Component parts, details or accessories; Auxiliary operations
- B29C49/78—Measuring, controlling or regulating
- B29C49/783—Measuring, controlling or regulating blowing pressure
- B29C2049/7831—Measuring, controlling or regulating blowing pressure characterised by pressure values or ranges
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
- B29C49/42—Component parts, details or accessories; Auxiliary operations
- B29C49/78—Measuring, controlling or regulating
- B29C49/783—Measuring, controlling or regulating blowing pressure
- B29C2049/7832—Blowing with two or more pressure levels
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
- B29C49/42—Component parts, details or accessories; Auxiliary operations
- B29C49/78—Measuring, controlling or regulating
- B29C49/786—Temperature
- B29C2049/7861—Temperature of the preform
- B29C2049/7862—Temperature of the preform characterised by temperature values or ranges
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2949/00—Indexing scheme relating to blow-moulding
- B29C2949/30—Preforms or parisons made of several components
- B29C2949/3032—Preforms or parisons made of several components having components being injected
-
- 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
- B29C49/08—Biaxial stretching during blow-moulding
- B29C49/10—Biaxial stretching during blow-moulding using mechanical means for prestretching
- B29C49/12—Stretching rods
-
- 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
- B29C49/08—Biaxial stretching during blow-moulding
- B29C49/10—Biaxial stretching during blow-moulding using mechanical means for prestretching
- B29C49/14—Clamps
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
- B29C49/42—Component parts, details or accessories; Auxiliary operations
- B29C49/78—Measuring, controlling or regulating
-
- 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
- B29K2025/00—Use of polymers of vinyl-aromatic compounds or derivatives thereof as moulding material
- B29K2025/04—Polymers of styrene
- B29K2025/06—PS, i.e. polystyrene
-
- 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
- B29K2995/00—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds
- B29K2995/0037—Other properties
- B29K2995/0065—Permeability to gases
- B29K2995/0067—Permeability to gases non-permeable
-
- 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
- B32B2250/03—3 layers
-
- 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
-
- 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
-
- 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
- Hollow body with improved barrier effect The present invention relates to hollow bodies with improved barrier effect.
- WO-A-2008/40821 describes the production of injection-stretch-blow molded articles having a capacity of at least 250 ml.
- the PF also describes how the barrier effect of the bottles can be increased.
- a preform is produced in a known manner by 2K injection molding from the styrene polymer and a suitable barrier material and then blown into a bottle.
- the two polymers used are generally incompatible with each other and usually have different processing window.
- One consequence of this is that bottles made up of only two layers of these materials are difficult to produce.
- the present invention was therefore based on the object to remedy the aforementioned disadvantages.
- new and improved hollow bodies having improved barrier effect have been found, which are characterized in that they are constructed of a three-layer sandwich structure with a shell of polystyrene and a middle layer as a vapor barrier, as well as processes for their preparation and use.
- Polystyrene is understood to mean rubber-free or rubber-containing polystyrene, styrene-butadiene copolymers and mixtures of the polymers and / or block copolymers.
- Rubber-free polystyrene is also referred to as GPPS (general purpose polystyrene).
- Conventional rubbery styrenic polymers contain a diene-based rubber phase dispersed in a rigid matrix of styrenic polymer.
- impact polystyrene HIPS, high impact polystyrene
- polystyrene hard matrix and dispersed therein, for example, polybutadiene rubber particles. It is obtained by first preparing a rubber - for example in solution - dissolves the rubber in styrene and then polymerized the mixture to HIPS.
- polystyrene is also understood to mean styrene-butadiene block copolymers.
- the styrene-butadiene block copolymers may also be completely or partially hydrogenated.
- the butadiene may also be completely or partially replaced by isoprene.
- the hollow bodies according to the invention with improved barrier effect are composed of a three-layer sandwich structure with a shell of polystyrene, a middle layer as a vapor barrier and an inner layer of polystyrene.
- any polystyrenes or mixtures of polystyrenes can be used, preferably HIPS having a weight average molecular weight of 150,000 to 240,000 D, a flowability of 2 to 20 ml / 10 min, measured at 200 ° C / 5 kg to ISO 1 133 and a rubber content from 2 to 10% or mixtures of HIPS with other polystyrenes such as GPPS having a weight average molecular weight of from 150,000 D to 450,000 D or styrene-butadiene block copolymers, more preferably HIPS having a polybutadiene content of from 5 to 9% by weight and an average Particle size, determined by laser light forward diffraction, from 1, 0 to 8.5 ⁇ (median).
- HIPS having a weight average molecular weight of 150,000 to 240,000 D, a flowability of 2 to 20 ml / 10 min, measured at 200 ° C / 5 kg to ISO 1 133 and a rubber content from 2 to 10% or mixtures of
- Suitable polymers are, for example, polyamides, polyesters, in particular PET, PVC, polyvinylidene fluoride, acrylonitrile copolymers having an acrylonitrile content of more than 50%, polyvinylidene chloride and polyvinylidene chloride copolymers, polyvinyl alcohol or polyolefins.
- Suitable middle layers as a vapor barrier are polyolefins such as polyethylene polymers, for example HDPE (high density polyethylene), LDPE (low density polyethylene) or LLDPE (linear low density polyethylene), ethylene / propylene copolymers, ethylene copolymers, for example ethylene / ⁇ -olefin copolymers , Ethylene / vinyl acetate copolymers, ethylene / vinyl alcohol copolymers, ethylene / alkyl acrylate copolymers, ethylene / acrylic acid copolymers or ethylene / styrene copolymers, chlorinated polyethylene, polypropylenes such as PP (polypropylene) homopolymers, PP random and block copolymers, ⁇ -olefin copolymers , PP blends.
- polyethylene polymers for example HDPE (high density polyethylene), LDPE (low density polyethylene) or LLDPE (linear low density polyethylene
- polystyrene shells such as poly-4-methyl-pent-1-ene, polyisobutene, cycloolefin, EPDM (ethylene-propene-diene copolymers) are suitable. Such polymers may be used singly or in admixture with each other. The polymers may also contain other blend components, especially those which improve the adhesion or compatibility to the polystyrene shell.
- Suitable polymers for this are styrene-butadiene block copolymers and olefin copolymers and terpolymers, preferably polyethylene and polypropylene, which are optionally modified by addition of 0 to 40 wt .-% of a styrene-butadiene block copolymer, more preferably polyethylene and polypropylene with an additive from 0.1 to 30% by weight of a styrene-butadiene block copolymer.
- the inner layer may be the same or different than the shell. The same materials are preferably used for the shell and inner layer.
- the middle layer forms a vapor barrier against the escape of vaporizable or gaseous fillers of the hollow body, for example water, alcohols, odors, flavorings, gases such as air, carbon dioxide, nitrogen or oxygen or mixtures of such substances.
- the barrier effect may include one or more of these components; Thus, for example, there may be an increased water vapor barrier, but not an improved barrier to oxygen and / or carbon dioxide.
- the middle layer forms a barrier against water, odors or flavors.
- Particularly preferred is the effect of the barrier layer as a water vapor barrier.
- the barrier effect can be determined by various methods, for example by reducing the concentration or decreasing the weight when stored, according to DIN 53380, DIN 53536, DIN 52429 or ASTM F-1249.
- the hollow bodies according to the invention with improved barrier action can be prepared as follows:
- a preform can be prepared by the method of multi-component injection molding. In this case, a granulate of polystyrene and granules of polyolefin can be melted and injection-molded into a preform. The injection molding can be done in such a way that the preform already shows a structure of three layers. Subsequently, 2.) the formed preform can be transferred to a second tool and stretched and blown there.
- Multi-component injection molding is the sequential assembly of multiple melts during the injection molding process in one tool.
- the melts can be conducted against each other or into each other.
- the connections achieved can be inextricable but also against each other. The method is described for example in: multi-component injection molding 2000, Springer VDI Verlag, ISBN 3-935065-00-0.
- Injection molding is usually carried out using the parameters recommended by the manufacturers.
- the granules are injection molded, for example, at temperatures of 200 to 280 ° C.
- the polystyrene component is sprayed usually below 260 ° C, preferably below 250 ° C.
- the melt can under are largely processed by injection molding, for example, by covering the granules with a stream of nitrogen in the catchment area of the injection molding machine.
- design features can already be preformed, especially for the later not or little stretched areas. In particular, this makes it possible to form important features for the closure, for example screw threads, snap connections, cover strips, etc.
- the injection stretch blow molding of the preforms obtained can be carried out according to various embodiments known in principle.
- the preforms are usually heated in a first step above the softening point of the polystyrene matrix.
- the preforms are preferably heated above 110 ° C., particularly preferably above 15 ° C.
- the preforms are not heated above 190 ° C, more preferably not above 160 ° C, most preferably not above 150 ° C.
- the heating can be carried out by various methods, for example by hot air, by IR or NIR radiation.
- the preforms are pre-blown with a low pre-pressure. Typical pre-pressures are in the range of 0.5 to 15 bar, preferably 1 to 15 bar, most preferably in the range of 2 to 10 bar.
- a pre-stretching punch is driven into the preform and extends in length as a result of /.
- the pre-stretching speed is usually 0.1 to 3 m / s, preferably 0.2 to 2 m / s, more preferably 0.7 to 1, 8 m / s, but may also be higher or possibly lower.
- the pre-stretcher draws the hollow body to 10 to 100%, preferably 20 to 100%, most preferably 40 to 100% of its final length.
- the pre-stretching can also be done in such a way that a pair of pliers grasps the body from the outside and stretches into the length.
- the hollow body Before, during or after pre-stretching, the hollow body is subjected to a blowing pressure.
- a blowing pressure of not more than 25 bar, preferably not more than 20 bar and most preferably not more than 15 bar is advantageous and a minimum blowing pressure of not less than 1 bar, preferably not less than 2 bar , more preferably not less than 4 bar.
- the process is controlled so that the polymer of the barrier layer and the polymer polystyrene layer can be similarly stretched. This can be achieved by selecting the process conditions and / or the choice of polymers.
- the bottles are usually pressed against a mold which imprints the bottle with various design features, in particular those which improve the mechanical stability of the bottle, which indicate material and manufacturing information important for the handling of the bottle or the aesthetic purpose follow.
- Individual process stages can also be run through several times, for example, the heating and optionally the pre-blowing and / or the Vorverstreckung initially only take place in a partial area (for example, the later neck or bottom piece).
- a second step if appropriate, then the entire preform or the remaining portion is heated and formed into its final shape by a stretch blow molding process. Subsequently, at 10 10 to 190 ° C, preferably at 15 to 150 ° C are blown. If the bottles / cups are used for food, a sterilization step often makes sense. For this purpose, for example, rinsed with aqueous hydrogen peroxide solution and then dried.
- the bottles can be further developed by known methods, for example, printed, paperboard or provided with a shrink sleeve.
- the container is provided with a shrink sleeve containing at least one styrene-butadiene copolymer.
- shrink sleeves are described, for example, in WO-A-06/074819 or in WO-A-2009/156378. This makes it possible for the bottle and shrink sleeve to be materially recycled together and to dispense with cost-intensive separation of the sleeve and separate utilization of the components.
- Particularly preferred are bottles in which the polyolefin components are provided with an addition of a styrene-butadiene block copolymer.
- the bottles can be closed by various known methods, for example by snap caps or screw caps.
- Preferably used screw cap closures preferably made of polyolefins or polystyrenes.
- the hollow bodies according to the invention with improved barrier action are suitable for filling with liquids, such as, for example, solutions, suspensions, emulsions or dispersions, or giant-shaped solids, preferably for filling with dairy products, soft drinks, cosmetics, detergents and cleaners, animal feed, cereals.
- liquids such as, for example, solutions, suspensions, emulsions or dispersions, or giant-shaped solids, preferably for filling with dairy products, soft drinks, cosmetics, detergents and cleaners, animal feed, cereals.
- HIPS Impact-resistant polystyrene with an average molar mass of 193,000 D, a polybutadiene content of 7.9%, a flowability of 4.6 ml / 10 min, an E modulus of 1880 MPa and a yield stress of 25.6 MPa.
- PE-LD low-density polyethylene, type Lupolen® 2420 H, from Basell with MFR
- PE-HD high-density polyethylene, type Hostalen® GD 4755 from Basell with
- Styroflex a thermoplastic elastomer based on styrene and butadiene, BASF
- the preforms were heated in a driveway over the softening point (about 125 ° C) and at a pressure of 6 to 8 bar, a blowing pressure of 14 bar and a stretching bar speed of 1300 mm / s to bottles with a capacity of 1 liter and Mouth opening 38 mm processed.
- the heating time for the preforms with polyolefin polymer layer was extended by 8 sec. Determination of the topload
- Preform A was heated to 123 ° C and processed with a pre-pressure of 8 bar easily to good bottles. All bottles were stable after filling with water with a Topload of over 20 kg provided. All bottles withstood an overpressure of 2 bar without bursting.
- Preform K was heated to various temperatures in the range 120-150 ° C and processed under different pre-and blowing pressure settings and punch speeds. Under no condition could a useful bottle be obtained: Comparative Example 3 (analogous to WO-A-2008/40 821, Example No. 5, but without three-layer structure)
- Preform L was heated to various temperatures in the range of 1 15 - 140 ° C and processed under various pre-and blowing pressure settings and punch speeds. Under no condition could a viable bottle be obtained. Repeatedly, the inner layer of the outer layer or the polyethylene core stuck unstretched in the bottle. As the blowing temperature increased, the preform increasingly tore during the stretching process. Compared to Comparative Examples 2 and 3, Examples 1 to 6 show that bottles of a similar quality as in Comparative Example 1 can be produced if the preform has a three-layer structure with a middle layer of the special layer.
- the results of the water vapor permeability of the bottles with and without barrier layer are determined.
- the bottles were filled with 1 liter of water, sealed with a screw cap made of polyethylene, weighed and at room temperature at about 60% rel. Humidity stored upright. After 89 days, the bottles were weighed again and the difference in weight determined:
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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EP11707875A EP2547506A1 (de) | 2010-03-17 | 2011-03-14 | Hohlkörper mit verbesserter barrierewirkung |
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP10156739 | 2010-03-17 | ||
EP11707875A EP2547506A1 (de) | 2010-03-17 | 2011-03-14 | Hohlkörper mit verbesserter barrierewirkung |
PCT/EP2011/053772 WO2011113781A1 (de) | 2010-03-17 | 2011-03-14 | Hohlkörper mit verbesserter barrierewirkung |
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EP2547506A1 true EP2547506A1 (de) | 2013-01-23 |
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Application Number | Title | Priority Date | Filing Date |
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EP11707875A Withdrawn EP2547506A1 (de) | 2010-03-17 | 2011-03-14 | Hohlkörper mit verbesserter barrierewirkung |
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WO (1) | WO2011113781A1 (de) |
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FR3053271B1 (fr) | 2016-06-29 | 2018-07-27 | Sidel Participations | Procede de fabrication par etirage soufflage d'un recipient a vitesse d'etirage elevee |
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Publication number | Priority date | Publication date | Assignee | Title |
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DE19529402C2 (de) * | 1995-08-10 | 2001-11-29 | Basf Ag | Mehrschichtlaminat |
DE102005001637A1 (de) | 2005-01-12 | 2006-07-20 | Basf Ag | Styrol-Butadien-Blockcopolymermischungen für Schrumpffolien |
ES2354314T3 (es) | 2007-02-28 | 2011-03-14 | Basf Se | Cuerpos huecos constituidos por poliestireno resiliente, procedimiento de inyección con soplado y estirado para su obtención y empleo del cuerpo hueco. |
MX2010013464A (es) | 2008-06-27 | 2010-12-21 | Basf Se | Mezclas de copolimero de bloque de estireno butadieno para peliculas de envoltura de encogimiento. |
-
2011
- 2011-03-14 EP EP11707875A patent/EP2547506A1/de not_active Withdrawn
- 2011-03-14 WO PCT/EP2011/053772 patent/WO2011113781A1/de active Application Filing
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