NZ625986B2 - Material and packaging for yeast storage - Google Patents
Material and packaging for yeast storage Download PDFInfo
- Publication number
- NZ625986B2 NZ625986B2 NZ625986A NZ62598612A NZ625986B2 NZ 625986 B2 NZ625986 B2 NZ 625986B2 NZ 625986 A NZ625986 A NZ 625986A NZ 62598612 A NZ62598612 A NZ 62598612A NZ 625986 B2 NZ625986 B2 NZ 625986B2
- Authority
- NZ
- New Zealand
- Prior art keywords
- liquid
- film
- packaging
- ethylene
- carbon dioxide
- Prior art date
Links
- 239000000463 material Substances 0.000 title claims abstract description 26
- 240000004808 Saccharomyces cerevisiae Species 0.000 title claims description 96
- 238000004806 packaging method and process Methods 0.000 title claims description 32
- 238000003860 storage Methods 0.000 title claims description 21
- 238000004643 material aging Methods 0.000 title description 2
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims abstract description 116
- 239000007788 liquid Substances 0.000 claims abstract description 88
- 239000007789 gas Substances 0.000 claims abstract description 63
- 239000001569 carbon dioxide Substances 0.000 claims abstract description 58
- 229910002092 carbon dioxide Inorganic materials 0.000 claims abstract description 58
- 239000002985 plastic film Substances 0.000 claims abstract description 45
- 229920006255 plastic film Polymers 0.000 claims abstract description 45
- 239000004615 ingredient Substances 0.000 claims abstract description 31
- 230000035699 permeability Effects 0.000 claims abstract description 30
- 239000005038 ethylene vinyl acetate Substances 0.000 claims abstract description 29
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 22
- 239000001301 oxygen Substances 0.000 claims abstract description 19
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 19
- 229920000642 polymer Polymers 0.000 claims abstract description 10
- 239000011116 polymethylpentene Substances 0.000 claims abstract description 8
- 239000004372 Polyvinyl alcohol Substances 0.000 claims abstract description 5
- 229920002451 polyvinyl alcohol Polymers 0.000 claims abstract description 5
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 claims description 19
- 239000006071 cream Substances 0.000 claims description 19
- DQXBYHZEEUGOBF-UHFFFAOYSA-N but-3-enoic acid;ethene Chemical compound C=C.OC(=O)CC=C DQXBYHZEEUGOBF-UHFFFAOYSA-N 0.000 claims description 17
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 claims description 17
- 239000004698 Polyethylene Substances 0.000 claims description 16
- 229920000573 polyethylene Polymers 0.000 claims description 16
- -1 polyethylene terephthalate Polymers 0.000 claims description 16
- 229920003023 plastic Polymers 0.000 claims description 15
- 239000004033 plastic Substances 0.000 claims description 15
- 238000000034 method Methods 0.000 claims description 11
- 239000005020 polyethylene terephthalate Substances 0.000 claims description 8
- 229920000139 polyethylene terephthalate Polymers 0.000 claims description 8
- 229910052799 carbon Inorganic materials 0.000 claims description 7
- 238000004519 manufacturing process Methods 0.000 claims description 6
- 229920002554 vinyl polymer Polymers 0.000 claims description 5
- 229920001038 ethylene copolymer Polymers 0.000 claims description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 3
- 239000004952 Polyamide Substances 0.000 claims description 3
- 229920002647 polyamide Polymers 0.000 claims description 3
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 claims 3
- 229920001577 copolymer Polymers 0.000 abstract description 16
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 abstract description 5
- 239000005977 Ethylene Substances 0.000 abstract description 5
- 235000013305 food Nutrition 0.000 abstract description 5
- 235000014680 Saccharomyces cerevisiae Nutrition 0.000 description 92
- JVTAAEKCZFNVCJ-UHFFFAOYSA-N lactic acid Chemical compound CC(O)C(O)=O JVTAAEKCZFNVCJ-UHFFFAOYSA-N 0.000 description 24
- 239000012263 liquid product Substances 0.000 description 16
- 239000000203 mixture Substances 0.000 description 16
- 239000000047 product Substances 0.000 description 14
- 238000012360 testing method Methods 0.000 description 13
- 239000004310 lactic acid Substances 0.000 description 12
- 235000014655 lactic acid Nutrition 0.000 description 12
- 239000012748 slip agent Substances 0.000 description 12
- 238000005259 measurement Methods 0.000 description 10
- 238000002360 preparation method Methods 0.000 description 10
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 9
- 241000894006 Bacteria Species 0.000 description 8
- 239000007900 aqueous suspension Substances 0.000 description 7
- 230000001332 colony forming effect Effects 0.000 description 7
- 235000013312 flour Nutrition 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 210000005253 yeast cell Anatomy 0.000 description 6
- 102000013142 Amylases Human genes 0.000 description 5
- 108010065511 Amylases Proteins 0.000 description 5
- 235000019418 amylase Nutrition 0.000 description 5
- 238000007872 degassing Methods 0.000 description 5
- 238000001514 detection method Methods 0.000 description 5
- 238000012856 packing Methods 0.000 description 5
- 229920000098 polyolefin Polymers 0.000 description 5
- 230000008961 swelling Effects 0.000 description 5
- 239000004743 Polypropylene Substances 0.000 description 4
- 239000003570 air Substances 0.000 description 4
- 229940025131 amylases Drugs 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 4
- 235000013339 cereals Nutrition 0.000 description 4
- 239000003795 chemical substances by application Substances 0.000 description 4
- 230000003750 conditioning effect Effects 0.000 description 4
- 238000001125 extrusion Methods 0.000 description 4
- 229920001155 polypropylene Polymers 0.000 description 4
- 239000000725 suspension Substances 0.000 description 4
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 4
- 101100243025 Arabidopsis thaliana PCO2 gene Proteins 0.000 description 3
- 239000000654 additive Substances 0.000 description 3
- 150000001336 alkenes Chemical class 0.000 description 3
- 235000008429 bread Nutrition 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 150000002500 ions Chemical class 0.000 description 3
- 229920001684 low density polyethylene Polymers 0.000 description 3
- 239000004702 low-density polyethylene Substances 0.000 description 3
- JRZJOMJEPLMPRA-UHFFFAOYSA-N olefin Natural products CCCCCCCC=C JRZJOMJEPLMPRA-UHFFFAOYSA-N 0.000 description 3
- QLZJUIZVJLSNDD-UHFFFAOYSA-N 2-(2-methylidenebutanoyloxy)ethyl 2-methylidenebutanoate Chemical compound CCC(=C)C(=O)OCCOC(=O)C(=C)CC QLZJUIZVJLSNDD-UHFFFAOYSA-N 0.000 description 2
- WSSSPWUEQFSQQG-UHFFFAOYSA-N 4-methyl-1-pentene Chemical compound CC(C)CC=C WSSSPWUEQFSQQG-UHFFFAOYSA-N 0.000 description 2
- 229920000107 Acetylated distarch adipate Polymers 0.000 description 2
- CIWBSHSKHKDKBQ-JLAZNSOCSA-N Ascorbic acid Chemical compound OC[C@H](O)[C@H]1OC(=O)C(O)=C1O CIWBSHSKHKDKBQ-JLAZNSOCSA-N 0.000 description 2
- 229920000881 Modified starch Polymers 0.000 description 2
- 241000235070 Saccharomyces Species 0.000 description 2
- 210000004027 cell Anatomy 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 230000001143 conditioned effect Effects 0.000 description 2
- 238000011109 contamination Methods 0.000 description 2
- 239000013256 coordination polymer Substances 0.000 description 2
- 238000007334 copolymerization reaction Methods 0.000 description 2
- 239000005042 ethylene-ethyl acrylate Substances 0.000 description 2
- 229920006244 ethylene-ethyl acrylate Polymers 0.000 description 2
- 229920006225 ethylene-methyl acrylate Polymers 0.000 description 2
- 239000005043 ethylene-methyl acrylate Substances 0.000 description 2
- 239000001963 growth medium Substances 0.000 description 2
- 239000001307 helium Substances 0.000 description 2
- 229910052734 helium Inorganic materials 0.000 description 2
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 2
- 229920001903 high density polyethylene Polymers 0.000 description 2
- 239000004700 high-density polyethylene Substances 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 238000011081 inoculation Methods 0.000 description 2
- 239000006194 liquid suspension Substances 0.000 description 2
- 230000004060 metabolic process Effects 0.000 description 2
- 235000019426 modified starch Nutrition 0.000 description 2
- 239000000178 monomer Substances 0.000 description 2
- 229920001748 polybutylene Polymers 0.000 description 2
- 238000006116 polymerization reaction Methods 0.000 description 2
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 2
- 239000004810 polytetrafluoroethylene Substances 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- PWKSKIMOESPYIA-UHFFFAOYSA-N 2-acetamido-3-sulfanylpropanoic acid Chemical compound CC(=O)NC(CS)C(O)=O PWKSKIMOESPYIA-UHFFFAOYSA-N 0.000 description 1
- 239000004382 Amylase Substances 0.000 description 1
- 241000722885 Brettanomyces Species 0.000 description 1
- 244000027711 Brettanomyces bruxellensis Species 0.000 description 1
- 101710121765 Endo-1,4-beta-xylanase Proteins 0.000 description 1
- IMROMDMJAWUWLK-UHFFFAOYSA-N Ethenol Chemical compound OC=C IMROMDMJAWUWLK-UHFFFAOYSA-N 0.000 description 1
- 239000004366 Glucose oxidase Substances 0.000 description 1
- 108010015776 Glucose oxidase Proteins 0.000 description 1
- 239000005909 Kieselgur Substances 0.000 description 1
- 241000235649 Kluyveromyces Species 0.000 description 1
- 241000481961 Lachancea thermotolerans Species 0.000 description 1
- 240000001929 Lactobacillus brevis Species 0.000 description 1
- 244000199866 Lactobacillus casei Species 0.000 description 1
- 240000006024 Lactobacillus plantarum Species 0.000 description 1
- 235000013965 Lactobacillus plantarum Nutrition 0.000 description 1
- 229920010126 Linear Low Density Polyethylene (LLDPE) Polymers 0.000 description 1
- 239000004367 Lipase Substances 0.000 description 1
- 102000004882 Lipase Human genes 0.000 description 1
- 108090001060 Lipase Proteins 0.000 description 1
- 239000004368 Modified starch Substances 0.000 description 1
- 239000004677 Nylon Substances 0.000 description 1
- 108090000854 Oxidoreductases Proteins 0.000 description 1
- 102000004316 Oxidoreductases Human genes 0.000 description 1
- 241001594238 Pyrinia selecta Species 0.000 description 1
- 241000235072 Saccharomyces bayanus Species 0.000 description 1
- 241000235344 Saccharomycetaceae Species 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 241000235006 Torulaspora Species 0.000 description 1
- 244000288561 Torulaspora delbrueckii Species 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000001318 acylated distarch adipate Substances 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 238000013019 agitation Methods 0.000 description 1
- 125000001931 aliphatic group Chemical group 0.000 description 1
- 239000012080 ambient air Substances 0.000 description 1
- 235000010323 ascorbic acid Nutrition 0.000 description 1
- 229960005070 ascorbic acid Drugs 0.000 description 1
- 239000011668 ascorbic acid Substances 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000002255 enzymatic effect Effects 0.000 description 1
- 238000010101 extrusion blow moulding Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 235000003086 food stabiliser Nutrition 0.000 description 1
- 235000019420 glucose oxidase Nutrition 0.000 description 1
- 229940116332 glucose oxidase Drugs 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 229920001519 homopolymer Polymers 0.000 description 1
- 230000002209 hydrophobic effect Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 229940072205 lactobacillus plantarum Drugs 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 235000019421 lipase Nutrition 0.000 description 1
- 239000002609 medium Substances 0.000 description 1
- 230000002906 microbiologic effect Effects 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- FATBGEAMYMYZAF-KTKRTIGZSA-N oleamide Chemical compound CCCCCCCC\C=C/CCCCCCCC(N)=O FATBGEAMYMYZAF-KTKRTIGZSA-N 0.000 description 1
- FATBGEAMYMYZAF-UHFFFAOYSA-N oleicacidamide-heptaglycolether Natural products CCCCCCCCC=CCCCCCCCC(N)=O FATBGEAMYMYZAF-UHFFFAOYSA-N 0.000 description 1
- 230000003204 osmotic effect Effects 0.000 description 1
- 239000007800 oxidant agent Substances 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 229920000515 polycarbonate Polymers 0.000 description 1
- 239000004417 polycarbonate Substances 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 229920000306 polymethylpentene Polymers 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 230000009257 reactivity Effects 0.000 description 1
- 230000000241 respiratory effect Effects 0.000 description 1
- 230000029058 respiratory gaseous exchange Effects 0.000 description 1
- 229960002181 saccharomyces boulardii Drugs 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000000454 talc Substances 0.000 description 1
- 229910052623 talc Inorganic materials 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
- 235000010493 xanthan gum Nutrition 0.000 description 1
- 239000000230 xanthan gum Substances 0.000 description 1
- 229920001285 xanthan gum Polymers 0.000 description 1
- 229940082509 xanthan gum Drugs 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
- B32B2250/00—Layers arrangement
- B32B2250/24—All layers being polymeric
-
- 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
- B32B2270/00—Resin or rubber layer containing a blend of at least two different 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
- B32B2307/00—Properties of the layers or laminate
- B32B2307/70—Other properties
- B32B2307/724—Permeability to gases, adsorption
-
- 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
- B32B2307/70—Other properties
- B32B2307/724—Permeability to gases, adsorption
- B32B2307/7242—Non-permeable
- B32B2307/7244—Oxygen barrier
-
- 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
-
- 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
-
- 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
- B32B27/306—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers comprising vinyl acetate or vinyl alcohol (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
- B32B27/34—Layered products comprising a layer of synthetic resin comprising polyamides
-
- 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
- B32B27/36—Layered products comprising a layer of synthetic resin comprising polyesters
-
- 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
- B32B3/26—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 a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer
- B32B3/266—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 a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer characterised by an apertured layer, the apertures going through the whole thickness of the layer, e.g. expanded metal, perforated layer, slit layer regular cells B32B3/12
-
- 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
- B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
- B32B7/02—Physical, chemical or physicochemical properties
-
- 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
- B65D33/00—Details of, or accessories for, sacks or bags
- B65D33/01—Ventilation or drainage of bags
-
- 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
- B65D85/00—Containers, packaging elements or packages, specially adapted for particular articles or materials
- B65D85/70—Containers, packaging elements or packages, specially adapted for particular articles or materials for materials not otherwise provided for
- B65D85/72—Containers, packaging elements or packages, specially adapted for particular articles or materials for materials not otherwise provided for for edible or potable liquids, semiliquids, or plastic or pasty materials
-
- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12N—MICROORGANISMS OR ENZYMES; COMPOSITIONS THEREOF; PROPAGATING, PRESERVING, OR MAINTAINING MICROORGANISMS; MUTATION OR GENETIC ENGINEERING; CULTURE MEDIA
- C12N1/00—Microorganisms, e.g. protozoa; Compositions thereof; Processes of propagating, maintaining or preserving microorganisms or compositions thereof; Processes of preparing or isolating a composition containing a microorganism; Culture media therefor
- C12N1/04—Preserving or maintaining viable microorganisms
-
- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12N—MICROORGANISMS OR ENZYMES; COMPOSITIONS THEREOF; PROPAGATING, PRESERVING, OR MAINTAINING MICROORGANISMS; MUTATION OR GENETIC ENGINEERING; CULTURE MEDIA
- C12N1/00—Microorganisms, e.g. protozoa; Compositions thereof; Processes of propagating, maintaining or preserving microorganisms or compositions thereof; Processes of preparing or isolating a composition containing a microorganism; Culture media therefor
- C12N1/14—Fungi; Culture media therefor
- C12N1/16—Yeasts; Culture media therefor
- C12N1/18—Baker's yeast; Brewer's yeast
Abstract
The disclosure relates to the use of a three-layer plastic film with a B-A-B’ structure as wrapping for a liquid or semi-liquid ingredient that produces gas, preferably carbon dioxide (CO2), characterized in that layer A consists of a polymer chosen from polymethylpentene (PMP) and olefinic copolymers, and layers B and B’ comprises a polymer chosen from polymethylpentene (PMP) and olefinic copolymers. The film is characterized in that the permeability of the film to carbon dioxide, measured according to ISO standard 15105-2:2003 annex B, is greater than or equal to 80 l/m2.24 h at delta P = 1 bar, - the film has a total thickness of from 20 to 50 microns, preferably of 30 microns, and the permeability of the film to oxygen (O2), measured according to ISO standard 15105-2:2003 annex B, is less than or equal to 30 l/m2.24 h at delta P = 1 bar. The olefinic copolymers may be copolymers of ethylene, in particular ethylene-vinyl acetate (EVA) and ethylene-polyvinyl alcohol (EVOH). The disclosure also relates to the plastic films and materials comprising them and the use of the film to produce a food package. The permeability of the film allows the produced carbon dioxide to vent through the layers of the bag. rs, and layers B and B’ comprises a polymer chosen from polymethylpentene (PMP) and olefinic copolymers. The film is characterized in that the permeability of the film to carbon dioxide, measured according to ISO standard 15105-2:2003 annex B, is greater than or equal to 80 l/m2.24 h at delta P = 1 bar, - the film has a total thickness of from 20 to 50 microns, preferably of 30 microns, and the permeability of the film to oxygen (O2), measured according to ISO standard 15105-2:2003 annex B, is less than or equal to 30 l/m2.24 h at delta P = 1 bar. The olefinic copolymers may be copolymers of ethylene, in particular ethylene-vinyl acetate (EVA) and ethylene-polyvinyl alcohol (EVOH). The disclosure also relates to the plastic films and materials comprising them and the use of the film to produce a food package. The permeability of the film allows the produced carbon dioxide to vent through the layers of the bag.
Description
Material and Packaging for Yeast Storage
Field of the invention
The present invention relates to the field of packing and to the storage of liquid or
semi-liquid products which produce gas, preferably carbon dioxide (CO2), and concerns
more particularly materials for ing liquid or semi-liquid products containing yeasts
or leavens.
Background of the invention
Yeast in aqueous suspension, when it is stored under favorable conditions, has
utable advantages compared with yeasts in solid form, so-called pressed or dried
yeast, in particular because of its simplified use, the fact that it is sed, and its good
performance levels which, moreover, make it a product that is appreciated by those
working in the bakery trade. As it happens, yeast in aqueous suspension is a product that
is very sensitive to its storage conditions, in particular its nment (temperature, pH,
CO2/O2 content, etc.), and particularly exposed to contaminations. It is thus a product
difficult to package which thus es hygienic storage conditions which at the same
time make it possible to maintain its microbiological quality, its performance levels, in
particular in terms of fermenting capacity, and its organoeleptic qualities. In addition, the
activity and the reactivity of a yeast, while they are responsible for good performance
levels during its use, constitute a drawback specific to the storage of such a product. For
good storage of the yeast, it is therefore desirable in practice to maintain said yeast in
aqueous suspension at low temperature, of about 4°C, and to provide for specific
ing means, in particular for the release of the gases resulting from the yeast
respiration metabolism, in particular carbon dioxide, while at the same time limiting the
other gas exchanges (oxygen from the ambient air) in ular in order to avoid the
development of contaminations.
l solutions for packaging yeast in s suspension have been proposed.
One of these solutions consists in packaging the liquid yeast in a Bag-in-Box. The
principle of the Bag-in-Box is to have, in a box lly made of cardboard (see, for
example, American patent number US 6,223,981), a flexible bag which has one or more
filling and/or ng orifices, called bases (see, for example, American patent number
US 4,863,770). Each base may have a screw thread or rings making it possible,
respectively, to screw on or clip on a cap. The Bag-in-Box thus formed may be stored, for
several weeks, at a temperature of between 0 and 6°C and at a relative ty of
between 50% and 100%. The user may recover a given amount of yeast in aqueous
suspension thus stored using a valve or a tap attached to a base after having removed the
cap. In the case where a valve is put in place, the user turns the -Box completely
upside down and places it in an appropriate refrigerated dispenser (see, for example, the
system described by the present applicant in international application ).
In the case where a tap is put in place, the Bag-in-Box is placed in the horizontal position
in a refrigerator or a cold room.
In order to avoid ng of the flexible bag contained in the carton of the Bag-in-
Box under the action of the carbon dioxide ed by the yeast, orifices forming vents
are provided for as specific degassing means (see, for example, European patent
EP 0 792 930-B1 and international ation from the Applicant).
Furthermore, the flexible bag is proportioned so as to leave a sufficient headspace in the
Bag-in-Box to allow the gas to be stored until a sufficient re allowing evacuation of
the gas through the degasser cap is reached. However, this degassing system is not
entirely satisfactory, in particular when the liquid yeast stored is a abilized yeast
which produces larger amounts of CO2 than stabilized yeast. , the swelling of the
flexible bag, which may cause a deformation of the carton, giving it a g appearance,
creates not only ms of stability of the Bag-in-Box, but may also prevent its insertion
into the refrigerated dispenser. In certain cases, the swelling can lead to rupture of the
. Furthermore, if the -Box is under pressure, the opening thereof by the user
may produce a geyser of product. Finally, when a Bag-in-Box is transported or handled,
if the yeast comes into contact with the degasser cap, the latter may be momentarily or
permanently clogged.
Application EP 2 019 051 by the present Applicant describes a packaging for a
liquid product containing yeast comprising a permeable material which has an S/M ratio
(exchange e area S of the material expressed in cm2 relative to the mass M of the
liquid product containing yeast expressed in grams), and coefficients of oxygen (O2)
permeability and of carbon dioxide (CO2) permeability determined so as, in particular, to
avoid swelling of the product and to prevent the penetration of contaminants. However,
such an S/M ratio does not allow much freedom regarding the choice of the shape and the
dimensions of the pouch.
Therefore, there is a need for packagings which are suitable for the storage and
maintaining of liquid products containing yeast and which allow better degassing of the
CO2 produced by yeast respiratory metabolism.
Summary of the invention
Generally, the t invention is based on the use of a multilayer plastic film
having a B-A-B’ structure with a specific composition, and thickness and gaspermeability
properties that can be used to form the internal part of the flexible bag of a
Bag-in-Box system. Contrary to the ng degassing systems, the degassing obtained
through using a film of the present invention is nt over time and m over the
entire surface of the bag. It therefore avoids the swelling of the flexible bag and all the
potential problems associated with this swelling.
More specifically, in a first aspect, the present invention relates to a layer
plastic film with a B-A-B’ structure as wrapping/packing for a liquid or semi-liquid
ingredient which produces gas, preferably carbon dioxide (CO2), characterized in that:
- layer A consists of a polymer chosen from polymethylpentene (PMP) and olefinic
copolymers, and
- each of layers B and B’ comprises a r chosen from polymethylpentene (PMP)
and olefinic copolymers,
and characterized in that:
- the permeability of the film to carbon e (CO2), measured according to
ISO standard 15105-2:2003 annex B, is greater than or equal to 80 l/m2.24 h at delta
P = 1 bar,
- the layers making up the film are extruded to a total thickness of from 20 to 50 microns,
ably from 25 to 35 microns, and
- the permeability of the film to oxygen (O2), measured according to ISO standard 15105-
2:2003 annex B, is less than or equal to 30 l/m2.24 h at delta P = 1 bar.
In certain embodiments, the permeability of the film to carbon dioxide, ed
according to ISO standard 15105-2:2003 annex B, is r than or equal to 90 l/m2.24 h
at delta P = 1 bar.
In certain embodiments, the olefinic copolymers comprise, in particular, ethylene
copolymers, in particular ethylene-vinyl acetate (EVA) and ethylene-polyvinyl alcohol
(EVOH). In n embodiments, the composition of layer B and the composition of
layer B’ are identical. In other embodiments, the composition of layer B and the
composition of layer B’ are different.
In certain particular embodiments of the invention, layer A consists of an ethylenevinyl
acetate (EVA) with a high vinyl acetate content, and each of layers B and B’
comprises an ethylene-vinyl acetate (EVA) having a vinyl acetate content which is less
than the vinyl acetate content of the ethylene-vinyl acetate of layer A. In certain
embodiments, the vinyl acetate content of the EVA included in layer B is identical to the
vinyl acetate content of the EVA included in layer B’. In other ments, these
contents are different. In n embodiments, the EVA with a high vinyl acetate t
comprises, as tage by weight, between 18% and 42% of vinyl acetate.
Each of layers B and B’ may also comprise at least one anti-block and/or slip agent.
In certain embodiments, layers B and B’ comprise one or more identical anti-block and/or
slip agents in the same proportions or in different proportions. In other embodiments,
layers B and B’ comprise one or more different anti-block and/or slip agents. In yet other
embodiments, one of layers B and B’ comprises one or more anti-block and/or slip agents
and the other layer does not comprise more lock and/or slip agents.
In a second aspect, the present invention relates to a plastic material composed of
two plastic films, characterized in that the first plastic film is a layer plastic film of
the invention, and the second plastic film is uniformly ated or has a permeability to
CO2 which is greater than or equal to that of the first plastic film.
In one particular ment of the invention, the second plastic film is ed
of oriented polyamide (OPA) and polyethylene (PE) or of polyethylene terephthalate
(PET) and polyethylene (PE).
In a third aspect, the present invention relates to a packaging comprising a
reservoir/container composed of a c material of the invention, characterized in that
the first plastic film of the plastic material defines the internal volume of the
reservoir/container.
In n ments of the invention, the reservoir/container is in the form of a
pouch having a total internal volume of between 1 l and 1000 l, preferably between 10 l
and 200 l, and even more preferably between 10 l and 50 l.
The pouch may comprise at least one base and one cap.
In certain embodiments of the invention, the packaging is in the form of a Bag-in-
Box and also comprises a cardboard box comprising an opening. In certain embodiments,
the base of the pouch is screwed or d into the opening of the carton. In other
embodiments, the base of the pouch is not ed to the opening of the carton.
In a fourth aspect, the present invention relates to the use of a plastic al of the
invention for the manufacture of a reservoir/container intended to receive a liquid or semiliquid
ingredient which produces gas, preferably CO2.
In a fifth aspect, the present invention relates to the use of a packaging of the
invention for the storage and the use of a liquid or semi-liquid ingredient which produces
gas, preferably CO2, characterized in that the packaging allows the gas produced to be
removed/evacuated.
In a sixth aspect, the present invention relates to a method for storing and using a
liquid or semi-liquid ingredient which produces gas, ably CO2, comprising the
ing steps:
- packaging the ingredient which produces gas in a packaging of the invention,
- storing, at a temperature of between 0 and 6°C and in a relative ty of n
50% and 100%, said packaged ient until its use, and
- using the liquid or semi-liquid ingredient which produces gas.
In certain preferred embodiments of the invention, the liquid or semi-liquid
ingredient which produces gas ses a leaven or a yeast, in particular a liquid yeast or
a cream yeast.
A more detailed description of certain preferred embodiments of the invention is
given below.
Detailed description of the invention
As mentioned above, the t invention is based on the use of a multilayer plastic
film optionally reinforced with a perforated second plastic film, as wrapping/packing for a
liquid or semi-liquid ingredient which produces gas, in particular carbon dioxide.
I - Multilayer plastic film
A multilayer c film according to the invention is characterized by the following
properties:
- the film has a B-A-B’ type structure,
- the layers making up the film are extruded to a total thickness of between 20 and
50 microns, preferably between 25 and 35 microns, and even more preferably between 27
and 32 microns,
- the permeability of the film to carbon dioxide is greater than or equal to 60 l/m2.24 h at
delta P = 1 bar, and
- the film is slightly impermeable to oxygen (O2) and/or to air and has a permeability to
oxygen or less than or equal to 30 l/m2.24 h at delta P = 1 bar.
The three-layer plastic film according to the invention is generally impermeable to
liquid water and preferably to water vapor. Furthermore, since this c film is
intended to contain the liquid or semi-liquid product containing yeast, it preferably
consists of components appropriate according the tions ng to materials in
contact with food products.
In the three-layer B-A-B’-type ure, the compositions of layers B and B’ may
be identical in all respects. Alternatively, the compositions of layers B and B’ may be
different.
In certain preferred embodiments, the multilayer plastic film ing to the
invention has a B-A-B’ structure, in which layer A consists of a polymer chosen from
polyolefins and olefinic copolymers, and each of layers B and B’ comprises a polymer
chosen from polyolefins and olefinic mers. Polyolefins and ic copolymers
are hydrophobic and generally have a high chemical inertia, which makes them materials
suitable for food wrapping.
The term lefin” or “polyalkene” is intended to mean a synthetic, saturated,
aliphatic homopolymer resulting from the polymerization of an olefin. The polyolefins
suitable for producing a multilayer film ing to the invention include, for example,
polyethylene (PE), polypropylene (PP), polymethylene (PMP) which results from the
polyaddition of the 4-methylpentene monomer, and polybutene-1 (PB-1).
The term “olefinic copolymer” is ed to mean a synthetic, ted, aliphatic
copolymer resulting from the polymerization of an olefin, such as ethylene and
derivatives thereof, with a monomer other than said olefin. The ic copolymers
suitable for producing a multilayer film according to the invention include, for example,
ethylene-vinyl acetate (EVA) which results from the copolymerization of ethylene and of
vinyl acetate; ethylene-polyvinyl alcohol (EVOH) which results from the
copolymerization of ethylene and of vinyl alcohol; ethylene-acrylic ester copolymers,
such as ethylene-methyl acrylate (EMA) and ethylene-ethyl acrylate (EEA); and ethyleneacrylic
ester-maleic anhydride (EAEMA).
In one particular embodiment, layer A consists of an ethylene-vinyl acetate (EVA)
with a high vinyl acetate content and each of layers B and B’ comprises an ethylene-vinyl
acetate (EVA) with a lower vinyl acetate content. The term “EVA with a high vinyl
e content” is intended to mean herein an EVA containing between 18% and 42% of
vinyl e, wherein the percentages are percentages by . The term “EVA with a
lower vinyl acetate content”, as used , is intended to mean an EVA which contains a
lower percentage of vinyl e than the EVA which forms layer A. The layers B and
B’ may be composed of the same ethylene-vinyl acetate (therefore containing the same
vinyl e content) or of EVA copolymers containing different vinyl acetate contents.
In any event, these vinyl acetate contents must be less than that of the EVA which forms
layer A. One layer of the B-A-B’ structure may have a weight content of vinyl acetate
which is constant throughout the entire layer. Alternatively, one layer of the B-A-B’
structure may have a composition gradient, wherein the weight t of vinyl acetate is,
for example, increased or decreased in a given ion of the layer.
In certain embodiments, layer B or layer B’, or else each of layers B and B’,
comprises, in addition to the polymer, at least one anti-block and/or slip agent. The term
“anti-block and/or slip agent”, as used herein, is intended to mean any agent which
reduces friction, for example between the surface of the final film and the production tool,
and/or which has a positive effect on the manipulation of the films by preventing any risk
of adhesion. An anti-block and/or slip agent le for carrying out the present
invention may be chosen from diatomaceous earth, talc, oleamide and ide, and
combinations f. Depending on the nature of the polymer making up layers A, B and
B’, on the type of machine used for the production of the multilayer film and on its future
uses, those skilled in the art will be able to select an anti-block and/or slip agent or a
particular combination of such agents, and will be able to determine the required s
of this or these agent(s) to obtain the desired anti-block and/or slip effect. Layers B and
B’ may comprise one or more identical anti-block and/or slip agents in the same
proportions or different proportions. Alternatively, layers B and B’ may comprise one or
more ent anti-block and/or slip agents, or alternatively one of the layers B and B’
may comprise one or more anti-block and/or slip agents and the other layer may not
comprise it or them.
The preparation of a multilayer plastic film according to the invention can be carried
out using any appropriate method known in the art. In certain preferred embodiments, the
three-layer plastic film is prepared by nation or by coextrusion. The usion
may be carried out using a flat die extrusion (termed cast extrusion) technique or an
extrusion-blow molding technique. Those skilled in the art will be able to select the most
riate que according to the composition of the multilayer plastic film and/or
the dimensions of the film to be prepared. Those skilled in the art will also be able to
ine the operating temperature, pressure and relative humidity conditions which are
optimal for implementing the que selected.
Surprisingly, the present Applicant has noted that, in order to allow efficient daily
evacuation of CO2 while at the same time allowing the production of flexible bags on
commonly used shaping machines, the three-layer c film must have a thickness of
between 20 microns and 50 microns, preferably between 25 microns and 35 microns, and
even more preferably between 27 microns and 32 microns.
The y of the multilayer plastic film according to the invention in the
wrapping/packing of liquid or semi-liquid products which produce gas, and in particular
of liquid or semi-liquid products containing yeasts, is a result of its gas-permeability
ties. More specifically, a film according to the invention has a permeability to CO2
of greater than or equal to 80 l/m2.24 h at delta P = 1 bar, preferably greater than or equal
to 90 l/m2.24 h at delta P = 1 bar, and is slightly impermeable to oxygen and/or to air. As
used herein, the term “impermeable to oxygen and/or to air” is intended to mean a film
which has a permeability to oxygen (O2) which is less than or equal to 30 4 h at
delta P = 1 bar.
According to the invention, the bilities to CO2 and to O2, also called
coefficients of permeability (CP), are defined as the coefficients of transmission
respectively of carbon dioxide and of , expressed in cm3 per m2 per 24 h per bar
(cm3/m2.24h.bar or l/m2.24h.bar) and measured according ISO standard 15105-2:2003
annex B using a method with katharometric detection on a gas tograph with an
injection valve and a sampling loop. Prior to the measurement, the material is
conditioned for 48 hours at 23°C and at a gas moisture content of 0% RH. The
measurement of the coefficient of permeability is carried out at a temperature of 23°C,
with a gas humidity of 0% RH. The external face of the material is subjected to the test
gases and the measurements are d out on three test specimens of 50 cm2. The test
gas consists of a mixture of 50% oxygen and 50% carbon dioxide. The chromatographic
detection is carried out using a Porapak(R) Q detector with a detector ature of
140oC, and a filament current of 200 mA after calibration of the chromatograph with gas
standards having a known oxygen and carbon dioxide concentration.
For greater accuracy in the measurements of coefficients of slight permeability CP
to O2, (i.e. less than 5000 cm3/m2.24h.bar), the measurement is carried out ing to
ISO standard 15105-2:2003 annex A and ASTM standard D 3985-05 using a Systech
8000 apparatus. Prior to the measurement, the material is conditioned for 48 hours at
23oC and a gas moisture content of 0% RH. The measurement of the coefficient of
bility is carried out at a temperature of 23°C, with a gas moisture content of 0%
RH. The al face of the material is subjected to the test gases and the measurements
are carried out with 21% oxygen on three test specimens of 0.5dm2. The ization
time is 24 hours.
If the detection threshold of the apparatus is reached, it is possible to reduce the O2
content of the test gases and/or the surface area measured so as to thus again be placed
under the detection conditions. All that is then required is to weight the result obtained by
the reduction of content applied and/or the reduction of surface area applied.
For a ement of coefficient of CO2 permeability only, it is also possible to
apply the method of detection by flame ionization on a gas chromatograph with an
injection valve and a sampling loop in accordance with ISO standard 15105-2:2003 annex
II - Plastic Material
A plastic material according to the invention is composed of two c films,
wherein the first is a multilayer plastic film as described above and the second plastic film
is perforated and/or has a CO2 bility greater than or equal to that of the first c
film. The second plastic film has two roles: it confers mechanical strength to the flexible
bag thus produced, and its bility and/or its perforations allow evacuation of the gas
produced by the yeast and evacuated due to the bility of the first plastic film.
Surprisingly, the present Applicant has noted that, when the second plastic film does
not have a permeability to CO2 greater than or equal to that of the first plastic film, only
perforation distributed over the entire surface of the second plastic film allows ent
tion of the gas produced by the yeasts. It has also been observed that, in order to
allow good tion of the gas ed by the yeasts stored in the flexible bags, the
perforation density must be high. Thus, the second plastic film must contain at least 1000
ations/m2, preferably at least 5000 perforations/m2 and even more preferentially
about 7000 perforations/m2.
As ted above, the second plastic film, which is intended to be on the outside of
the flexible bag containing the yeasts, confers mechanical strength to this bag. The
ent(s) of the plastic film will therefore have to be chosen accordingly. The term
“mechanical th”, as used herein, is intended to mean any property or combination of
properties of hardness, stiffness, flexibility, elasticity, etc., which increases the solidity of
the flexible bag. For example, the mechanical strength may be a resistance to being
dropped and/or a resistance to impacts. It is, in fact, desirable for the reservoirs
containing the liquid or semi-liquid products to remain leaktight during an impact, given
that, during the transportation of industrial products, it is virtually inevitable that they will
occasionally be dropped.
In certain preferred ments, the component(s) of the second c film is/are
chosen from polyethylene (PE), high-density polyethylene (HDPE), low-density
polyethylene (LDPE), linear low-density polyethylene (LLDPE), polycarbonate,
polyester, polyethylene terephthalate (PET), polytetrafluoroethylene (PTFE),
polypropylene (PP), ide (PA) and oriented ide (OPA), and mixtures and/or
combinations thereof. In particular, the second plastic film may be advantageously
composed of oriented polyamide (OPA) and of polyethylene (PE) or of polyethylene
terephthalate (PET) and of polyethylene (PE). The second plastic film may, for example,
be obtained by extrusion, coextrusion or lamination.
The preparation of the c material according to the invention may be carried out
by any method known in the art, provided that, in the resulting plastic, each of the two
plastic films can perform its role(s) (i.e. in particular, permeability to carbon e and
slight permeability to oxygen and/or to air for the first plastic film, mechanical strength
and evacuation of the gas by virtue of the perforations or of the permeability to CO2 for
the second plastic film). In certain preferred embodiments, the first and second plastic
films are assembled only at the time of manufacture of the le bag, for example by
welding of the two films on the four sides of the bag. r example is the bag-in-bag
, in which the bags are attached to one another, either on the four sides, or only at
the level of the base.
III - Packaging
A packaging ing to the invention generally comprises a reservoir or container
consisting of a plastic material as described above, in which the first c film defines
the internal volume of the reservoir in which the liquid or semi-liquid product which
produces gas is to be contained. The reservoir or container ma y be of any shape
(cylindrical, cubic, parallelepipedal, flat, etc.) and/or any dimensions. In certain preferred
embodiments, the reservoir or ner is a flexible bag or a pouch that is relatively flat,
in particular a flexible bag or pouch intended to be used in a Bag-in-Box system.
According to certain embodiments, a pouch according to the invention may contain
at least 20 g of liquid or semi-liquid product which produces gas, for example between
25 g and 600 g of product for applications intended for consumers of the general public
market. In such embodiments, the pouch is a le bag having a total internal volume
of between 20 ml and 800 ml, preferably between 20 ml and 500 ml.
According to other embodiments, a pouch according to the invention may contain at
least 5 kg of liquid or semi-liquid product which produces gas, for example between
10 kg and 1000 kg of product, or between 10 kg and 100 kg of product, or else between
kg and 50 kg of t for applications intended for professionals, for e those
working in the bakery trade, for instance bakers or industrial bakeries. In such
embodiments, the pouch is a flexible bag having a total internal volume of between 1 l
and 1000 l, for example between 10 l and 200 l, or between 50 l and 500 l, or else
between 500 l and 1000 l.
A pouch according to the invention may n one or more bases which have a
screw thread or rings for screwing on or clipping on a cap. Such bases make it possible to
fill and/or empty the pouch (see, for example, American patent number US 4,863,770).
lly, at least one base will be located at the bottom, during use, such that the liquid
or semi-liquid product can be drawn off by gravity or siphoned. The bag or pouch may
also have means for easier and/or more complete emptying or draining of the bag or
pouch. Such means are in particular described in DE-A-3 502 455, WO 35,
WO 85/0483, WO 90/06888, WO 72 and EP-A-0 138 620.
In certain embodiments, a pouch according to the invention may allow the user to
determine or estimate, visually, the amount of liquid or semi-liquid product present in the
pouch. In particular, the pouch may be transparent or translucent, or may se one or
more transparent or translucent parts.
In certain embodiments, a packaging according to the invention is in Bag-in-Box
form. In such embodiments, the packaging comprises, in addition to the flexible bag or
pouch, a supporting wire basket or a rigid (self-supporting) box which can contain this
bag or pouch, as described, for example, in American patent number US 6,223,981. The
rigid box may be a carton.
IV - Use of the Packaging
Liquid or semi-liquid ingredients which produce gas
A packaging according to the present invention may be used for the storage of any
liquid or semi-liquid ingredient which produces gas, in particular CO2. In certain
ments of the invention, the liquid or semi-liquid ingredient which produces gas
comprises a yeast or a leaven. In certain particular embodiments of the ion, the
ingredient is a liquid yeast or a cream yeast.
The expression “liquid or semi-liquid ingredient containing yeast” is ed to
mean a liquid sion, typically an aqueous suspension, comprising yeast. This
generally es fresh yeast or dry yeast which has been resuspended. According to one
red embodiment of the present invention, the yeast is a fresh yeast.
Advantageously, said yeast, at the time it is packaged, comprises at least 105 colonyforming
units (CFU) of yeast per gram, preferably at least 108 -forming units
(CFU) of yeast per gram, and advantageously at least 109 colony-forming units (CFU) of
yeast per gram.
Preferably, the liquid ingredient containing yeast has a content of at least 0.03% by
weight of dry matter of live yeast cells, more preferably of at least 0.1%, and even more
ably of at least 5% of dry matter of yeast.
The packaging according to the invention is particularly suitable for storing yeasts
used for their fermentative activity. They are in particular yeasts belonging to the family
Saccharomycetaceae (classification of The Yeasts, A Taxonomic Study, Kurtzman C.P
and Fell C.W., 4th edition, Elsevier, 1998). The invention thus relates principally to the
storage of baker’s yeasts, but also relates to the e of enological, distiller’s and/or
brewer’s yeasts for which problems of storage in liquid or semi-liquid form arise.
The enological, distiller’s and/or brewer’s yeasts are preferentially chosen from the
Saccharomyces genus, especially S. bayanus and S. cerevisiae, in particular the varieties
uvarum, calbergensis and cerevisiae, the Kluyveromyces genus, in particular
K. thermotolerans, the Brettanomyces genus, especially B. bruxellensis, and the
Torulaspora genus, in particular T. delbrueckii, alone or as a mixture.
The baker’s yeast is preferentially a yeast chosen from Saccharomyces cerevisiae,
romyces chevalierii and Saccharomyces boulardii.
The ingredient which produces gas (for example the ingredient containing yeast) is
liquid or semi-liquid, i.e. it has a viscosity of less than 20 000 oises, preferably less
than or equal to 1000 centipoises, measured at a temperature of approximately 10°C using
a standard viscometer, for example a J.P. Selecta ST2001 viscometer (L1 = needle;
speed = 10 rpm up to a viscosity of 600 oises, speed = 1.5 rpm above 600
centipoises) on a sample of 500 ml. Baker’s doughs are not typically liquid or iquid
products.
The liquid or iquid ingredient containing yeast has a density preferably
between 1.01 and 1.25, and even more preferably between 1.05 and 1.15.
The expression “liquid or semi-liquid ingredient containing yeast” denotes, in
particular according to the present invention, cream yeast, preferably baker’s cream yeast,
and liquid .
The expression “cream yeast, preferably baker’s cream yeast” is tood to mean
a liquid suspension, lly an aqueous suspension, of live yeast cells, preferably
baker’s yeast cells, said sion having a preferential dry matter content of at least
12% by weight and generally of between 12% and 50% by weight (broad definition of
cream yeast). Preferably, the liquid or semi-liquid cream yeast corresponds to the
definition of cream yeast in the strict sense, i.e. it has a dry matter content of between
12% and 25% by weight, and even more preferably between 15% and 22% by weight.
r, the t invention is also of use for cream yeasts, preferably baker’s cream
yeasts, with a higher dry matter content, i.e. of at least 25% by weight, such as, in
particular, “high-density” baker’s cream yeasts containing one or more c agents,
for instance edible polyhydroxy compounds and edible salts. Such high-density baker’s
cream yeasts, which may in particular have a dry matter content of from 25% to 48% by
weight, or else from 25% to 46% by , are known and are, for e, described in
WO 91/12315 and WO 03/048342.
The term d leaven” is understood to mean, according to the invention, a liquid
suspension, typically an aqueous suspension, of live yeast cells, ably baker’s yeast
cells, of live lactic acid bacteria cells and of flour. Preferably, the liquid leaven has a dry
matter content of between 12% and 20% by weight, and more preferentially of between
% and 17% by weight.
Stable, ready-to-use liquid bread leavens suitable for being packaged according to
the invention are in particular those described, by the applicant, in European patent
number EP 0 953 288-B1 and international application .
Advantageously, the liquid leaven is obtained by using a culture medium comprising
at least one unmalted cereal flour and water, by carrying out an inoculation with at least
one preparation of heterofermentative lactic acid bacteria and at least one preparation of
yeast, preferably by additionally using at least one malted cereal flour providing amylases
or any equivalent source of amylases and/or carrying out at least one inoculation with a
preparation of homofermentative lactic acid bacteria. At the time it is ed, it thus
preferably comprises at least 106 colony-forming units (CFU) of lactic acid ia per
gram and at least 104 colony-forming units (CFU) of yeast per gram and even more
preferentially at least 109 colony-forming units (CFU) of lactic acid bacteria per gram and
at least 106 -forming units (CFU) of yeast per gram, has a stable final pH of
between 4 and 4.3 and a dry matter content of between 13% and 20% and entially
contains from 15 to 30 g/kg of lactic acid and from 6 to 10 g/kg of acetic acid. The
preparation of such a leaven is described, for example, in an patent number
EP 0 953 288-B1.
Another particularly advantageous ready-to-use liquid bread leaven according to the
present invention comprises a flour-based culture medium ning at least one cereal
flour and water, said medium being inoculated and fermented with at least
homofermentative lactic acid bacteria which bioconvert lactic acid and being inoculated
with at least one preparation of yeasts, entially baker’s yeasts. The ready-to-use
liquid bread leaven preferentially also comprises at least one malted cereal flour providing
amylases or any equivalent source of amylases. It thus comprises 108 colony-forming
units (CFU) of lactic acid bacteria, of which 60% are homofermentative lactic acid
bacteria which bioconvert lactic acid, per gram, and at least 106 colony-forming units
(CFU) of yeast per gram, has a stable final pH of n 3.8 and 4.5 and a dry matter
content of n 27% and 35%, and contains at least 7 g of acetic acid, preferentially
from 15 to 20 g/kg of lactic acid and from 7 to 10 g/kg of acetic acid.
Preferably, the yeasts used for the leaven preparation may be Saccharomyces
chevalierii yeasts, the homofermentative bacteria are those of the Lactobacillus plantarum
and/or casei species, and the heterofermentative strains are those of the Lactobacillus
brevis species.
In certain embodiments, the liquid yeast product, preferably liquid fresh yeast
product, in particular the liquid cream yeast and the liquid leaven, are stabilized by adding
one or more food izers. These stabilizers delay or prevent the settling out of the
yeast cells in the suspension. By virtue of their ce in the suspension, the liquid
fresh yeast product, preferably the cream yeast or the liquid leaven, retains its
homogeneity for longer when it is stored without agitation. Among the various food
stabilizers that are of use for stabilizing cream yeast, mention may be made of gums, such
as xanthan gum, and thermally and/or ally modified starches, such as acetylated
distarch adipate corresponding to the definition of the modified starch E1422. Such
stabilized cream yeasts are, for example, described in EP-A-0 792 930.
The yeast or leaven compositions may also contain additives or aids, the role of
which is to act as a bread-making improver and/or to maintain the homogeneity of the
suspension. These additives may be oxidizing agents such as ascorbic acid, reducing
agents such as L-cysteine, tic preparations which have one or more enzymatic
activities, for instance amylase, xylanase, lipase and/or phospholipidase preparations, or
oxidase, for ce glucose oxidase. These additives may also be one or more osmotic
acids, for instance edible polyhydroxy compounds and edible salts.
Storage of liquid or semi-liquid ingredients which produce gas
A subject of the present ion is also the use of a packaging as described above
for storing a liquid or semi-liquid ingredient which produces gas, in particular a liquid or
iquid ient ning yeast as described above. Such ing is more
particularly used at temperatures below 8°C, preferably between 0°C and 6°C, and a
relative humidity of between 50% and 100%, and allows good storage of the liquid or
semi-liquid products ning yeasts for at least 4 weeks, preferably for at least 6 weeks,
and even more preferably for at least 8 weeks.
Under these storage conditions, such a packaging may, in addition, be used with a
potential variation in temperature which can range up to 35°C for a maximum period of
8 hours, and preferably for 4 hours, and even more preferably which can range up to 20°C
for a maximum period of 2 hours.
Unless otherwise defined, all the cal and scientific terms used in the
description have the same meaning as that commonly understood by an ordinary specialist
in the field to which this invention belongs. Likewise, all the publications, all the patent
applications, all the patents and any other references mentioned herein are incorporated by
way of reference.
Examples
The following examples describe some ments of the present invention.
However, it is understood that the examples are presented merely by way of illustration
and in no way limit the scope of the invention.
Example 1
Three-layer films based on ethylene vinyl acetate (EVA) were prepared using blown
film extrusion ques well known to those skilled in the art. Two films, film 1 and
film 2, were obtained with a thickness of 30 m and 40 m, respectively. The central
layer A of each of these films consisted of an EVA having a weight content of vinyl
acetate of n 18% and 42%, and the external layers B and B’ were made of EVA
having a weight content of vinyl acetate which is less than that of the EVA of the layer A.
Permeability measurements. The oxygen and carbon dioxide transmission
coefficients were determined on a sample of film under standard conditions and after
ioning in a climatic r at 23°C and 90% relative humidity (RH) for 48 hours.
The oxygen and carbon dioxide ission coefficients were determined using an
LYSSY GPM5000 apparatus. Each sample was placed in a test cell of 50 cm2 between
two chambers, the lower chamber being constantly d with a stream of helium and
the other chamber being in contact with the test gas (a CO2/O2/N2 mixture in the
proportions 1/3, 1/3, 1/3). Any gas which passes h the film sample is transported
by the vector gas to the gas chromatograph ed with a katharometer detector. The
experimental conditions used were the following:
- vector gas: helium,
- test gas: mixture in the proportions 1/3, 1/3, 1/3 of CO2/O2/N2,
- test temperature: 23oC,
- the films are tested as such and then after conditioning at 23°C and 90% RH for
48 hours.
The thickness of the film sample was measured using an Adamel gie
precision micrometer (precision 1 m). The measurements were carried out on three
different s of each film.
Results. The s obtained are presented in the following Tables 1 and 2, in
which PCO2 and PO2 are expressed in l/m2/24 h/atm.
Table 1. Thickness and oxygen and carbon dioxide transmission coefficients for three
samples of film 1
Film 1 Thickness PCO2 PO2
(µm)
Sample 1 28 87 14
Standard conditions Sample 2 27 87 21
Sample 3 26 93 18
Sample 1 25 101 19
After conditioning Sample 2 28 111 23
Sample 3 20 123 26
Table 2. Thickness and oxygen and carbon dioxide transmission coefficients for three
samples of film 2
Film 2 Thickness PCO2 PO2
(µm)
Sample 1 36 66 12
Standard conditions Sample 2 37 80 15
Sample 3 34 87 16
Sample 1 39 78 14
After conditioning Sample 2 37 91 18
Sample 3 39 88 19
The permeabilities of the films before and after conditioning do not significantly
differ.
Pouches of 10 and 20 kg, intended for the wrapping/packing of liquid yeast and/or
of cream yeast, were prepared using the films of Example 1. The empty pouches have a
rectangular or square shape with internal dimensions of 500 680 for the 20 kg pouches
and 500 500 for the 10 kg pouches.
The pouches were reinforced with a second multilayer film having the following
composition: a layer of 20 m of OPA (Nylon) having a density of 23 g/m2, a layer of
adhesive, and a layer of 80 m of LDPE having a density of 74 g/m2.
The second film is perforated, comprising 7090 ations per m2. The pouches
were equipped with a screw-in base positioned 105 mm from the upper sealing.
Control pouches were used as controls. These control pouches consisted of a film of
polyethylene slightly permeable to CO2 (permeability of 17 to 27 4 h at delta
P = 1 bar), and had a degasser cap which allowed the evacuation of the carbon dioxide
produced during storage and transportation.
Test for measuring gas given off. The objective of this test was to evaluate the
amount of CO2 which is leaked, during e, through a Bag-in-Box (BIB) according to
the invention (i.e. “carton + pouch according to the invention”) and through a control BIB
(i.e. “carton + control pouch”) after each has been filled with a liquid product containing
yeast resulting from the same tion. To this end, each filled BIB was placed entirely
in a ght bag. Thus, any gas which is leaked from the wrapping system is trapped in
the bag. Each day, this gas was d from the leaktight bag while being measured
using the principle of the measuring cylinder: the system, similar to a measuring cylinder,
is first of all filled with water. The tap of the pouch ning the BIB and of the
measuring cylinder are then opened. The gas drives off the water and the volume of gas
thus evacuated is measured. The results obtained are reported in the following Table 3.
Table 3. Amount of CO2 which is leaked from the various BIBs tested as a function of
storage time
Storage BIB 10 kg BIB 20 kg
time (days) according to the control (ml) according to the control (ml)
invention (ml) invention (ml)
1 1860 1220 2220 2100
3 2320 2480 4320 4400
6 3500 3680 7120 7200
7 1100 1040 2300 2300
8 1080 1140 1280 1260
9 360 800 1460 1320
1080 1180 2300 2200
13 2580 2840 4940 5340
14 890 1600 1120 1290
900 1140 1300 1440
17 1980 1960 3560 4200
3060 3180 5200 5400
21 980 920 1260 1320
22 1200 1200 2080 2180
23 1000 980 1260 1500
24 1080 980 2080 1560
Total (ml) 24970 26340 43800 45010
Average
per day 1.04 1.10 1.83 1.88
(liter)
As can be noted in Table 3, the behavior of the BIBs according to the invention and
the or of the control BIBs are identical, both in terms of average amount of gas
leaked per day, and of the total volume of CO2 leaked during the 24 days of the tests (as
shown in Table 4).
Table 4. Total amount of CO2 leaked from the various BIBs in 24 days of storage
BIB 10 kg BIB 20 kg
according to the control ing to the control (ml)
invention (ml) (ml) invention (ml)
Total volume
of CO2 25 27 44 45
leaked in
24 hours
(liter)
Claims (24)
1. Use of a three-layer plastic film with a B-A-B’ ure as wrapping for a liquid or semi-liquid ingredient that es gas, preferably carbon dioxide (CO2), characterized in that: - layer A consists of a polymer chosen from ethylene copolymers and polymethylpentene (PMP), and - each of layers B and B’ comprises a polymer chosen from ethylene copolymers and polymethylpentene (PMP), and characterized in that: - the permeability of the film to carbon dioxide, measured according to ISO standard 15105-2:2003 annex B, is greater than or equal to 80 l/m2.24 h at delta P = 1 bar, - the film has a total thickness of from 20 to 50 microns, preferably of 30 microns, and - the permeability of the film to oxygen (O2), measured according to ISO standard 15105-2:2003 annex B, is less than or equal to 30 l/m2.24 h at delta P = 1 bar.
2. The use according to claim 1, characterized in that the permeability of the film to carbon dioxide, measured according to ISO standard 15105-2:2003 annex B, is greater than or equal to 90 l/m2.24 h at delta P = 1 bar.
3. The use ing to claim 1 or claim 2, characterized in that layers B and B’ are identical.
4. The use according to claim 1 or claim 2, terized in that layers B and B’ are different.
5. The use ing to any one of claims 1 to 4, characterized in that the ethylene copolymers comprise ethylene-vinyl acetate (EVA) and ethylene-polyvinyl alcohol (EVOH).
6. The use according to any one of claims 1 to 5, terized in that: - layer A consists of an ethylene-vinyl acetate (EVA), and - each of layers B and B’ comprises an ethylene-vinyl acetate (EVA) having a vinyl acetate content which is less than that of the ethylene-vinyl acetate of layer A.
7. The use according to claim 6, characterized in that the ethylene-vinyl e (EVA) of layer A has vinyl acetate content, as percentage by , between 18% and 42% of the ethyl acetate.
8. A plastic material composed of two c films, characterized in that the first plastic film is a three-layer plastic film as defined in any one of claims 1 to 7, and the second plastic film is uniformly perforated.
9. The plastic al according to claim 8, characterized in that the second plastic film is composed of oriented polyamide (OPA) and hylene (PE) or of polyethylene terephthalate (PET) and polyethylene (PE).
10. A packaging comprising a reservoir/container composed of a plastic material according to claim 8 or claim 9, characterized in that the first plastic film of the plastic material defines the internal volume of the reservoir/container.
11. The packaging according to claim 10, characterized in that the reservoir/container is in the form of a pouch having a total internal volume of between 1 l and 1000 l, preferably between 10 l and 200 l, and more preferably between 1 l and 50 l.
12. The packaging according to claim 11, characterized in that the pouch comprises a base and a cap.
13. The packaging according to claim 12, terized in that the packaging is in the form of a Bag-in-Box and also comprises a cardboard box comprising an opening.
14. Use of a plastic al according to claim 8 or claim 9, for manufacturing a container/reservoir intended to e a liquid or iquid ingredient which produces gas, preferably carbon dioxide.
15. Use of a packaging according to any one of claims 10 to 13 for the storage and use of a liquid or semi-liquid ingredient which produces gas, preferably carbon dioxide, terized in that the packaging allows tion of the gas produced.
16. Method for the storage and use of a liquid or semi-liquid ingredient which produces gas, preferably carbon dioxide, comprising the following steps: - packaging of the ingredient which produces gas in a packaging according to any one of claims 10 to 13, - e, at a temperature of between 0 and 6°C and in a relative ty of between 50% and 100%, of said packaged ingredient until use, and - use of the liquid or semi-liquid ingredient which produces gas.
17. The use according to any one of claims 1 to 7, 14 and 15 or the method according to claim 16, characterized in that the liquid or semi-liquid ingredient which produces gas comprises a yeast or a leaven.
18. The use or the method according to claim 17, terized in that the liquid or semi-liquid ingredient which produces gas is a liquid yeast or a cream yeast.
19. Use of a three-layer plastic film with a B-A-B’ structure as wrapping for a liquid or semi-liquid ingredient that produces gas, preferably carbon dioxide (CO2), according to claim 1 and substantially as herein disclosed.
20. A plastic material ed of two plastic films, according to claim 8 and substantially as herein disclosed.
21. A packaging comprising a reservoir/container composed of a plastic material, according to claim 10 and substantially as herein disclosed.
22. Use of a plastic material, according to claim 14 and substantially as herein disclosed.
23. Use of a packaging, according to claim 15 and substantially as herein disclosed.
24. Method for the storage and use of a liquid or semi-liquid ient which produces gas, preferably carbon e, according to claim 16 and substantially as herein disclosed.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1161599A FR2984285B1 (en) | 2011-12-14 | 2011-12-14 | MATERIAL AND PACKAGING FOR YEAST PRESERVATION |
FR1161599 | 2011-12-14 | ||
PCT/FR2012/052914 WO2013088074A1 (en) | 2011-12-14 | 2012-12-13 | Material and packaging for yeast storage |
Publications (2)
Publication Number | Publication Date |
---|---|
NZ625986A NZ625986A (en) | 2016-01-29 |
NZ625986B2 true NZ625986B2 (en) | 2016-05-03 |
Family
ID=
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