EP2001759A1 - Diffusionsreduzierende korkbeschichtung - Google Patents
Diffusionsreduzierende korkbeschichtungInfo
- Publication number
- EP2001759A1 EP2001759A1 EP07711466A EP07711466A EP2001759A1 EP 2001759 A1 EP2001759 A1 EP 2001759A1 EP 07711466 A EP07711466 A EP 07711466A EP 07711466 A EP07711466 A EP 07711466A EP 2001759 A1 EP2001759 A1 EP 2001759A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- coating
- cork
- layer
- polymers
- hydrophobic
- 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.)
- Granted
Links
- 239000011248 coating agent Substances 0.000 title claims abstract description 114
- 238000000576 coating method Methods 0.000 title claims abstract description 94
- 239000007799 cork Substances 0.000 title claims abstract description 86
- 238000000034 method Methods 0.000 claims abstract description 26
- 229920001477 hydrophilic polymer Polymers 0.000 claims abstract description 9
- 229920001600 hydrophobic polymer Polymers 0.000 claims abstract description 7
- 229920000642 polymer Polymers 0.000 claims description 36
- 239000010410 layer Substances 0.000 claims description 30
- 239000007788 liquid Substances 0.000 claims description 22
- 239000008187 granular material Substances 0.000 claims description 17
- 230000002209 hydrophobic effect Effects 0.000 claims description 17
- 239000000758 substrate Substances 0.000 claims description 14
- 238000004132 cross linking Methods 0.000 claims description 13
- 229920002678 cellulose Polymers 0.000 claims description 11
- 239000008199 coating composition Substances 0.000 claims description 11
- 239000001913 cellulose Substances 0.000 claims description 10
- 229920002472 Starch Polymers 0.000 claims description 6
- 238000001035 drying Methods 0.000 claims description 6
- 235000019698 starch Nutrition 0.000 claims description 6
- 239000006185 dispersion Substances 0.000 claims description 4
- 229920001296 polysiloxane Polymers 0.000 claims description 4
- 239000008107 starch Substances 0.000 claims description 4
- 229920002451 polyvinyl alcohol Polymers 0.000 claims description 3
- 239000004372 Polyvinyl alcohol Substances 0.000 claims description 2
- 238000004140 cleaning Methods 0.000 claims description 2
- 238000007598 dipping method Methods 0.000 claims description 2
- 238000005507 spraying Methods 0.000 claims description 2
- 239000011247 coating layer Substances 0.000 claims 3
- 229920000881 Modified starch Polymers 0.000 claims 1
- 235000019426 modified starch Nutrition 0.000 claims 1
- 238000005096 rolling process Methods 0.000 claims 1
- 238000009792 diffusion process Methods 0.000 abstract description 5
- 239000000126 substance Substances 0.000 description 15
- 239000001993 wax Substances 0.000 description 14
- 150000001875 compounds Chemical class 0.000 description 11
- 235000010980 cellulose Nutrition 0.000 description 9
- 239000000463 material Substances 0.000 description 9
- 230000005012 migration Effects 0.000 description 9
- 238000013508 migration Methods 0.000 description 9
- 238000010438 heat treatment Methods 0.000 description 8
- -1 hydroxyalkyl ether Chemical compound 0.000 description 8
- 239000002904 solvent Substances 0.000 description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 7
- 235000013305 food Nutrition 0.000 description 6
- 150000004676 glycans Chemical class 0.000 description 6
- 229920001282 polysaccharide Polymers 0.000 description 6
- 239000005017 polysaccharide Substances 0.000 description 6
- 239000000654 additive Substances 0.000 description 5
- 239000007864 aqueous solution Substances 0.000 description 5
- 238000000605 extraction Methods 0.000 description 5
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 4
- 239000000470 constituent Substances 0.000 description 4
- 229920001577 copolymer Polymers 0.000 description 4
- 235000014113 dietary fatty acids Nutrition 0.000 description 4
- 239000003995 emulsifying agent Substances 0.000 description 4
- 239000000194 fatty acid Substances 0.000 description 4
- 229930195729 fatty acid Natural products 0.000 description 4
- 150000004665 fatty acids Chemical class 0.000 description 4
- 239000007787 solid Substances 0.000 description 4
- 239000013543 active substance Substances 0.000 description 3
- 150000001298 alcohols Chemical class 0.000 description 3
- KPUWHANPEXNPJT-UHFFFAOYSA-N disiloxane Chemical class [SiH3]O[SiH3] KPUWHANPEXNPJT-UHFFFAOYSA-N 0.000 description 3
- 150000002191 fatty alcohols Chemical class 0.000 description 3
- 239000004615 ingredient Substances 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 229920005615 natural polymer Polymers 0.000 description 3
- 229920001515 polyalkylene glycol Polymers 0.000 description 3
- 230000008569 process Effects 0.000 description 3
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- 238000003860 storage Methods 0.000 description 3
- 102000008186 Collagen Human genes 0.000 description 2
- 108010035532 Collagen Proteins 0.000 description 2
- 239000004971 Cross linker Substances 0.000 description 2
- 239000004375 Dextrin Substances 0.000 description 2
- 229920001353 Dextrin Polymers 0.000 description 2
- 108010010803 Gelatin Proteins 0.000 description 2
- 229920000663 Hydroxyethyl cellulose Polymers 0.000 description 2
- 229920002845 Poly(methacrylic acid) Polymers 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 239000004480 active ingredient Substances 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 230000001476 alcoholic effect Effects 0.000 description 2
- 125000000217 alkyl group Chemical group 0.000 description 2
- 125000004432 carbon atom Chemical group C* 0.000 description 2
- BVKZGUZCCUSVTD-UHFFFAOYSA-N carbonic acid Chemical group OC(O)=O BVKZGUZCCUSVTD-UHFFFAOYSA-N 0.000 description 2
- 150000001735 carboxylic acids Chemical class 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 229920001436 collagen Polymers 0.000 description 2
- 235000019425 dextrin Nutrition 0.000 description 2
- 150000002016 disaccharides Chemical class 0.000 description 2
- 150000002148 esters Chemical class 0.000 description 2
- RTZKZFJDLAIYFH-UHFFFAOYSA-N ether Substances CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 2
- 125000000524 functional group Chemical group 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 229920000159 gelatin Polymers 0.000 description 2
- 239000008273 gelatin Substances 0.000 description 2
- 235000019322 gelatine Nutrition 0.000 description 2
- 235000011852 gelatine desserts Nutrition 0.000 description 2
- 239000003292 glue Substances 0.000 description 2
- 229930195733 hydrocarbon Natural products 0.000 description 2
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 2
- 235000019447 hydroxyethyl cellulose Nutrition 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 150000002772 monosaccharides Chemical class 0.000 description 2
- 239000003960 organic solvent Substances 0.000 description 2
- 239000012188 paraffin wax Substances 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 235000019271 petrolatum Nutrition 0.000 description 2
- 239000012071 phase Substances 0.000 description 2
- 229920001223 polyethylene glycol Polymers 0.000 description 2
- 235000019422 polyvinyl alcohol Nutrition 0.000 description 2
- 229920000036 polyvinylpyrrolidone Polymers 0.000 description 2
- 239000001267 polyvinylpyrrolidone Substances 0.000 description 2
- 235000013855 polyvinylpyrrolidone Nutrition 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 230000002829 reductive effect Effects 0.000 description 2
- 229920002545 silicone oil Polymers 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 229920001059 synthetic polymer Polymers 0.000 description 2
- 230000004584 weight gain Effects 0.000 description 2
- 235000019786 weight gain Nutrition 0.000 description 2
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- 229920000089 Cyclic olefin copolymer Polymers 0.000 description 1
- IAYPIBMASNFSPL-UHFFFAOYSA-N Ethylene oxide Chemical compound C1CO1 IAYPIBMASNFSPL-UHFFFAOYSA-N 0.000 description 1
- PXGOKWXKJXAPGV-UHFFFAOYSA-N Fluorine Chemical compound FF PXGOKWXKJXAPGV-UHFFFAOYSA-N 0.000 description 1
- 239000004705 High-molecular-weight polyethylene Substances 0.000 description 1
- 239000004354 Hydroxyethyl cellulose Substances 0.000 description 1
- 239000004166 Lanolin Substances 0.000 description 1
- 241001465754 Metazoa Species 0.000 description 1
- CERQOIWHTDAKMF-UHFFFAOYSA-N Methacrylic acid Chemical compound CC(=C)C(O)=O CERQOIWHTDAKMF-UHFFFAOYSA-N 0.000 description 1
- 229920000426 Microplastic Polymers 0.000 description 1
- 239000004264 Petrolatum Substances 0.000 description 1
- 239000004952 Polyamide Substances 0.000 description 1
- 235000019484 Rapeseed oil Nutrition 0.000 description 1
- 240000000111 Saccharum officinarum Species 0.000 description 1
- 235000007201 Saccharum officinarum Nutrition 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical group [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 235000019486 Sunflower oil Nutrition 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- 230000002730 additional effect Effects 0.000 description 1
- 239000002318 adhesion promoter Substances 0.000 description 1
- 239000012790 adhesive layer Substances 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 150000001335 aliphatic alkanes Chemical class 0.000 description 1
- 125000003545 alkoxy group Chemical group 0.000 description 1
- 125000005376 alkyl siloxane group Chemical group 0.000 description 1
- 125000003368 amide group Chemical group 0.000 description 1
- 150000001413 amino acids Chemical class 0.000 description 1
- 125000000129 anionic group Chemical group 0.000 description 1
- 239000002518 antifoaming agent Substances 0.000 description 1
- 239000003963 antioxidant agent Substances 0.000 description 1
- 239000008346 aqueous phase Substances 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 235000013871 bee wax Nutrition 0.000 description 1
- 239000012166 beeswax Substances 0.000 description 1
- 235000013361 beverage Nutrition 0.000 description 1
- 210000000988 bone and bone Anatomy 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 125000004181 carboxyalkyl group Chemical group 0.000 description 1
- 239000004203 carnauba wax Substances 0.000 description 1
- 235000013869 carnauba wax Nutrition 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000006555 catalytic reaction Methods 0.000 description 1
- 125000002091 cationic group Chemical group 0.000 description 1
- 239000000460 chlorine Substances 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 239000003240 coconut oil Substances 0.000 description 1
- 235000019864 coconut oil Nutrition 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 229920006037 cross link polymer Polymers 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000007872 degassing Methods 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 239000002612 dispersion medium Substances 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 239000000839 emulsion Substances 0.000 description 1
- 230000032050 esterification Effects 0.000 description 1
- 238000005886 esterification reaction Methods 0.000 description 1
- 238000006266 etherification reaction Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 230000009969 flowable effect Effects 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 125000004435 hydrogen atom Chemical group [H]* 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- 229920013821 hydroxy alkyl cellulose Polymers 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 235000019388 lanolin Nutrition 0.000 description 1
- 229940039717 lanolin Drugs 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 230000001617 migratory effect Effects 0.000 description 1
- 239000012184 mineral wax Substances 0.000 description 1
- 239000012170 montan wax Substances 0.000 description 1
- 238000002414 normal-phase solid-phase extraction Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 235000019809 paraffin wax Nutrition 0.000 description 1
- 229940066842 petrolatum Drugs 0.000 description 1
- 239000002985 plastic film Substances 0.000 description 1
- 229920006255 plastic film Polymers 0.000 description 1
- 229920001281 polyalkylene Polymers 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 229920001228 polyisocyanate Polymers 0.000 description 1
- 239000005056 polyisocyanate Substances 0.000 description 1
- 229920006254 polymer film Polymers 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 229920005862 polyol Polymers 0.000 description 1
- 229920000098 polyolefin Polymers 0.000 description 1
- 150000003077 polyols Chemical class 0.000 description 1
- 229920001184 polypeptide Polymers 0.000 description 1
- 229920001451 polypropylene glycol Polymers 0.000 description 1
- 229920000909 polytetrahydrofuran Polymers 0.000 description 1
- 125000002924 primary amino group Chemical group [H]N([H])* 0.000 description 1
- 102000004196 processed proteins & peptides Human genes 0.000 description 1
- 108090000765 processed proteins & peptides Proteins 0.000 description 1
- 230000009993 protective function Effects 0.000 description 1
- 235000018102 proteins Nutrition 0.000 description 1
- 108090000623 proteins and genes Proteins 0.000 description 1
- 102000004169 proteins and genes Human genes 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 229920013730 reactive polymer Polymers 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
- 238000007761 roller coating Methods 0.000 description 1
- 239000005060 rubber Substances 0.000 description 1
- 125000000467 secondary amino group Chemical group [H]N([*:1])[*:2] 0.000 description 1
- 239000012176 shellac wax Substances 0.000 description 1
- 150000004756 silanes Chemical class 0.000 description 1
- 229920005573 silicon-containing polymer Polymers 0.000 description 1
- 229920002379 silicone rubber Polymers 0.000 description 1
- 239000004945 silicone rubber Substances 0.000 description 1
- 239000003549 soybean oil Substances 0.000 description 1
- 235000012424 soybean oil Nutrition 0.000 description 1
- 125000001424 substituent group Chemical group 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000002600 sunflower oil Substances 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 231100000563 toxic property Toxicity 0.000 description 1
- CLYZNABPUKUSDX-UHFFFAOYSA-N trichloromethoxybenzene Chemical compound ClC(Cl)(Cl)OC1=CC=CC=C1 CLYZNABPUKUSDX-UHFFFAOYSA-N 0.000 description 1
- 235000015112 vegetable and seed oil Nutrition 0.000 description 1
- 239000008158 vegetable oil Substances 0.000 description 1
- 239000012178 vegetable wax Substances 0.000 description 1
- 239000003039 volatile agent Substances 0.000 description 1
- 239000010497 wheat germ oil Substances 0.000 description 1
Classifications
-
- 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
- B65D39/00—Closures arranged within necks or pouring openings or in discharge apertures, e.g. stoppers
- B65D39/0005—Closures arranged within necks or pouring openings or in discharge apertures, e.g. stoppers made in one piece
- B65D39/0011—Closures arranged within necks or pouring openings or in discharge apertures, e.g. stoppers made in one piece from natural or synthetic cork, e.g. for wine bottles or the like
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B67—OPENING, CLOSING OR CLEANING BOTTLES, JARS OR SIMILAR CONTAINERS; LIQUID HANDLING
- B67B—APPLYING CLOSURE MEMBERS TO BOTTLES JARS, OR SIMILAR CONTAINERS; OPENING CLOSED CONTAINERS
- B67B1/00—Closing bottles, jars or similar containers by applying stoppers
- B67B1/03—Pretreatment of stoppers, e.g. cleaning, steaming, heating, impregnating or coating; Applying resilient rings to stoppers
Definitions
- the invention relates to a method for producing a multiple coating on cork stoppers intended to reduce diffusion of undesirable components through the cork surface. Furthermore, the invention relates to cork stoppers for closing bottles, which are provided with a multiple coating.
- cork as a stopper for closing beverage bottles has long been known.
- the drinks may be alcoholic or non-alcoholic.
- cork stoppers are used in bottle-shaped containers. During storage, it can not be ruled out that the liquid will come into contact with the side of the cork stopper facing the inside of the bottle for a longer period of time. As a problem may occur that unwanted components from the cork can migrate into the drink, which have toxic properties there, change the composition or can significantly affect the taste of the drink.
- TCA trichloroanisole
- This compound may be present in natural cork material in small amounts. But even the migration of the slightest traces TCA into the wine gives a negative taste, which is clearly felt and makes the product inedible. Diffusion or extraction of aroma-damaging substances, for example TCA, should therefore be prevented under the usual storage conditions from the cork stopper into a foodstuff.
- Methods have already been described for removing such taste-disturbing substances, in particular TCA, from extraction by natural cork material. This can be done, for example, by extraction with solvents or liquid CO2.
- methods are known to provide cork stoppers with a polymer layer to prevent the migration of interfering components from the cork into the food.
- WO 00/64649 a process is described to produce a coating on a cork to prevent flavor-active or odor-active ingredients from diffusing, using a copolymer which must have a flexible ingredient and a component retaining the active ingredient.
- the restrained ingredient should bind the active substance.
- Various coatings of aqueous solutions of silanes are described, wherein the solvent evaporates by heating and crosslinks the polymeric component.
- the lamination of cork is mentioned with plastic films. Creating a double coating with different coatings is not described.
- WO 00/64647 a method is described for producing on a substrate a coating which has the task of preventing the diffusion of taste or odor-active compounds.
- the polymer present in the coating should prevent migration of the components.
- the polymers are listed here without mentioning the particular requirements necessary to impart this desired property to the coating.
- US Pat. No. 6,348,243 describes a method for applying a thin surface coating to a cork in order to prevent contamination from the cork from migrating out of the molded body, the coating comprising a thin layer of silicone rubber.
- the rubber is dispersed in a solvent and is intended to be ultrasonicated be distributed to the surface.
- the coating should have a thickness of 20 microns or less.
- the coatings must also have additional properties; in particular, they must be flexible in order not to be destroyed when the compressible cork is applied to the bottle. In addition, they are said to have a friction-reducing effect to facilitate removal of the cork stopper from the bottle.
- the prior art coating processes are in need of improvement.
- Bonding with foils is technically complex.
- the different requirements for a coating limit the choice of polymers.
- the object is achieved by a method according to claim 1.
- the plug is provided with two different coatings based on liquid coating agents.
- cork stoppers As a substrate from which the cork stoppers can be made, natural cork is known, ie the plug is made of a piece of cork bark. Furthermore, it is known to use cork granules with adhesives in the form of plates or strands. glue and then put them in a plug shape. It may be agglomerated or microagglomerated cork. Such substrates have on the surface next to each other cork parts and small amounts of adhesive. Furthermore, cork materials are known, which may consist of cork granules and portions of plastic granules, which are glued together. Likewise, synthetic cork materials are known, which are based on polymers or polymer foams.
- a particularly distinctive aroma-active component TCA is known. This can occur in natural cork materials and even with small amounts of a significant deterioration of the taste of the food. However, it may also contain derivatives or similar compounds. In synthetic cork, such substances are not included. However, it may contain other aroma-active substances that change the taste of the food o- which should not get into the liquid for food law reasons.
- cork stoppers which are already packaged for use in bottles as a shaped body, provided with a dual coating. It should consist of a coating of film-forming substances having substantially hydrophilic properties.
- the second coating should consist of film-forming substances which have substantially hydrophobic properties. Possibly. it is also possible to apply additional layers to this two-layer coating.
- the order of the layers can be selected according to the substance to be hindered in the migration. It can be seen from the direction of the substrate surface, first a coating with hydrophilic properties are applied and then a coating with hydrophobic properties. Likewise, a reverse procedure is possible. However, a coating which has a hydrophilic coating on the cork substrate and a hydrophobic coating on the contents is preferred.
- the corresponding polymers of the coating compositions should be liquid at the application temperature, they may be soluble, they may be present in the form of a dispersion. By polymers are also understood low molecular weight oligomers, as long as they still have film-forming properties as a coating or can crosslink to give polymers.
- the hydrophilic coating agent contains at least one hydrophilic polymer.
- hydrophilic polymers are natural or synthetic polymers, such as polysaccharides, e.g. As starch, dextrins, cellulose, proteins, polyvinyl alcohol, polyvinylpyrrolidone, poly (meth) acrylic acid, high molecular weight polyethylene glycols or polyols and derivatives thereof.
- Examples of natural polymers are polysaccharides, ie polymeric compounds based on repeating sugar units.
- Polysaccharides which are suitable in the context of the present invention are, for example, those based on cellulose or starch.
- a suitable polymer according to the invention may be, for example, a polysaccharide, as it is present in natural form.
- polysaccharides which have been prepared synthetically or derivatives of natural or synthetic polysaccharides Such derivatives of starch and / or cellulose may, for example, be modified by oxidation, esterification, etherification, acid degradation.
- the alkyl and / or (ar) alkyl groups preferably additionally nonionic, anionic or cationic groups.
- Such reactions and corresponding polymers are known to the person skilled in the art.
- the individual molecules are usually substituted differently, so that their degree of substitution is an average.
- Examples of such hydrophilic polymers are hydroxyalkyl ether starches, hydroxyalkyl celluloses, carboxyalkyl celluloses, carboxyalkyl ether starches; Dextrins or hydroxyalkyldextrins. These can be used individually or in a mixture.
- polypeptides is gelatin, which may have a molecular weight of 15,000 to more than 250,000 g / mol. It is a product produced by hydrolysis of the collagen contained in the skin and bones of animals.
- the amino acid composition of gelatin is similar to that of the collagen from which it was obtained.
- synthetic polymers which contain many polar groups, such as polyvinylpyrrolidone, polyvinyl alcohols or polycarboxylic acids, such as poly (meth) acrylic acid, optionally as a copolymer with optionally OH-bearing esters of
- hydrophilic polymers can optionally be modified on the functional groups or react with crosslinking constituents.
- polyalkylene glycols are polyalkylene glycols. These are, for example, polyethylene glycols, polypropylene glycols or polytetrahydrofurans, or also mixed copolymers in random or block copolymeric form. In particular, portions of ethylene oxide building blocks are necessary to ensure sufficient hydrophilicity.
- di- or polyfunctional polyalkylene glycols have a molecular weight of between 600 and 30,000 (as measured by GPC). They can be liquid or they are highly viscous or solid substances. Possibly. it is possible to add crosslinking substances to these polymers of the coating composition which, under the application conditions, lead to a polymerization or, after the application of the coating composition, cause crosslinking of the polymer. ken. Examples of such crosslinkers are polyisocyanates or polyepoxides which give crosslinked polymer layers on heating and / or under catalysis.
- Preferred polymers are either liquid or dissolved or dispersed in solvents, especially in water.
- coating compositions may contain additives to influence processing properties of the dispersion or film properties of the coating.
- Additives are, for example, antioxidants, rheological aids, viscosity regulators, adhesion promoters, pH regulators, leveling agents, degassing agents, defoaming agents, emulsifiers.
- the viscosity of the coating agent is adapted to the application method.
- the coating agents are applied to the substrate and adhere to form ionic and covalent forces on the surface. Possibly. it is also possible that crosslinking substances are contained in the coating agent, which can react with the substrate.
- the second coating agent should contain hydrophobic polymers as an essential ingredient.
- Polymers with hydrophobic properties are known.
- these may be silicone oils or silicone compounds, polymers based on perfluorinated compounds, polymers based on polyolefins, waxes, polyamides or similar polymers.
- These polymers should be liquid at the application temperature, they may be dissolved or they may be dispersed in solvents.
- a known group of hydrophobic polymers suitable according to the invention are silicone polymers or oligomers. They may be polysiloxanes which are liquid or solid, they may have crosslinking groups or they may be inert. They may have functional groups. Rubbery, non-flowable polymers are less suitable. Examples of such compounds are silicone oils, polysiloxanes or optionally substituted alkoxysilanes.
- Waxes can be natural waxes, chemically modified waxes or synthetic waxes.
- Natural waxes include, for example, vegetable waxes such as carnauba wax, sugar cane wax, montan wax, beeswax, shellac wax, lanolin, mineral waxes or petrochemical waxes such as petrolatum, paraffin waxes or microwaxes.
- Synthetic waxes are generally understood as meaning polyalkylene waxes or polyalkylene glycol waxes. Also suitable are synthetically produced waxes from carboxylic acids and fatty alcohols or fatty acid amides. Also to the waxes, for example, so-called wax alcohols are counted, i. higher molecular weight, water-insoluble fatty alcohols having usually about 22 to 40 carbon atoms. Such products are known to the person skilled in the art.
- hydrophobic components are vegetable oils, such as sunflower oil, soybean oil, rapeseed oil, wheat germ oil, and the liquid portions of coconut oil, or fatty acid and fatty alcohol esters, such as monoesters of the fatty acids with alcohols having 3 to 24 carbon atoms. These can be liquid or highly viscous or they are solid at room temperature.
- liquid or solid paraffins can be used as constituent of the hydrophobic coating agent, such as unbranched paraffin hydrocarbons, in particular C 12-24 alkanes, or isoparaffins.
- perfluorinated compounds such as perfluorinated fatty acids, esters of carboxylic acids with perfluorinated alcohols, perfluorinated olefin (co) polymers.
- a particularly suitable group of compounds are alkyl siloxanes which have OH groups and / or NH groups, in particular those which contain hydroxyl groups, hydroxycarboxylic acid groups and / or mono- / disaccharides in the main chain or in the side chain.
- these are substituted aminoalkyl siloxanes and / or higher alkyl-modified amidoamino siloxanes which contain from 10 to 1500 silicon atoms.
- Suitable substituents are, for example, hydrogen atoms, monovalent, optionally fluorine, chlorine or bromine-substituted C 1 to C 18 hydrocarbon radicals, C 1 to C 12 alkoxy or hydroxy radicals, hydroxycarboxylic acids, mono- and disaccharides, alkylglycol radicals and / or primary or secondary amino groups or amido groups.
- Such compounds are described for example in EP 1081272 or DE 10214982.
- Such polymers can be converted into the water phase, for example, by means of suitable emulsifiers.
- the hydrophobic coating agent or the coating made therefrom may contain one or more of the above-mentioned hydrophobic polymers or oligomers. It may be present in the coating agent polymer substances which have a total of hydrophobic properties. However, it may also be low molecular weight oligomers which under the application conditions, for. B. in the aqueous phase, can be crosslinked as a coated layer after film formation to polymers. The corresponding higher molecular weight polymers of the coating film should then have the hydrophobic properties.
- the hydrophobic coating agent may be inert, it may be self-crosslinking, or crosslinkers may additionally be present in the coating composition.
- various additives and auxiliaries may be contained in the coating agent, which facilitate the processing of the coating agent or influence the properties of the coating. It can work be the same classes of substances that are to be present as additives in the hydrophilic coating agents.
- emulsifiers or other dispersing aids it must be ensured that these additives do not impair the essential character of the coating as a hydrophobic coating.
- the two coatings are applied successively to the substrate. It is possible that the cork stopper is evenly coated on all surfaces. However, it may be sufficient to coat only the side facing the content and the side facing the edge of the bottle. Possibly. It is also possible to coat a correspondingly small Korkform redesign and glue it to an uncoated cork stopper on the liquid side facing.
- the coating compositions should be liquid at the application temperature. This may preferably be between 15 and 70 ° C., preferably between 20 and 40 ° C. or at the usual room temperature.
- both coatings produce a dense coating on the cork stopper. Since the cork stopper may possibly have pores and imperfections on the surface, it may be necessary to apply a correspondingly increased amount of the coating agent.
- the coating should be applied from both layers in an amount between 1 mg / cm 2 of the surface up to 300 mg / cm 2 , in particular between 2 mg / cm 2 up to 150 mg / cm 2 . It is possible that both polymer layers have approximately the same application weight. However, it is also possible that they have different order weights. ben. It is particularly preferred if the hydrophobic coating is at least 50%, in particular at least 70%, of the layer weight.
- Another object of the invention is a method for coating cork substrates in plug shape, wherein at least two layers are applied. It is possible that the finished molded cork stopper is ground if necessary, and then optionally subjected to a cleaning on the surface. Further pretreatment is usually not necessary. It is also possible to print on the cork stopper.
- the first coating agent is then applied to the corresponding cork stopper in a highly viscous or highly viscous form, preferably an aqueous solution containing at least one hydrophilic polymer.
- the coating agent should be liquid at the application temperature. The viscosity of the coating agent can also be reduced by increased temperatures during application. However, it is preferable to operate at room temperature, i. usually between 20 to 40 ° C.
- the cork stopper may be heated to allow evaporation of the volatiles, especially water, from the coating agent. In this case, a crosslinking reaction can be initiated. In addition, a film formation of the polymer is supported.
- the application of the coating agent can be done by the known application method, for example by spraying, dipping, roller coating or coating in a drum. If the coated cork stoppers are moved afterwards, care must be taken to ensure that the integrity of the surface coating is not destroyed as far as possible.
- the second coating step with the second coating agent, preferably the hydrophobic coating agent, can be carried out.
- the same application methods mentioned above can be used. In this case, too, it is possible to process the coating agent under heating or to perform a drying step and / or a crosslinking step after the coating step. It should be ensured in this case, a film formation.
- One embodiment operates such that, after the first coating, the second coating is applied without further heating or crosslinking or after brief flash off of volatile constituents, if appropriate by compressed air and / or heating. Thereafter, a common drying step may be performed. In the process, possible solvents are removed and a film formation of the polymers is supported.
- the drying of the coated cork stoppers can be carried out by known methods. This solvent, water or other volatile components can be removed. Furthermore, it is possible by heating, for. B. by the IR radiation, by passing heated gases or by heating in an oven to remove volatile components from the coating.
- the temperatures can be between 20 C C up to 130 0 C, in particular between 30 0 C up to 90 0 C.
- the heating time can be between 30 sec. And 12 hours. Care must be taken that the substrate material does not undergo any negative changes at this temperature. Discolouration of the substrate material should also be avoided.
- additional layers can be applied as needed. These can serve, for example, to protect the cork stopper during storage or application.
- a cork stopper is obtained which has completely or partially on the surface at least a double coating.
- This at least double coating reduces migration either as diffusion or as extraction from the cork substrate into the food.
- the polymers form a dense layer, possibly highly viscous or crosslinked, migration of aroma-active substances, in particular TCA, is markedly reduced. Even in the event that possibly pores may be present in a coating, the second coating will nevertheless reduce migration of such components.
- the coatings should be flexible. Since in the application of a cork stopper this is compressed and then brought to its destination, the coatings according to the invention should only be crosslinked so far that a deformation is either elastic or permanently possible.
- the polymers must not be so brittle or so cross-linked that cracks and breaks in the coating can occur. Particularly suitable are those polymers in the coatings that still have cold flow properties and can close any defects.
- the polymers can be chosen so that they have separate performance properties.
- the side facing the substrate is particularly suitable for reducing migration of the aroma-active constituents.
- the side facing the liquid should avoid intensive contact of the liquid with the cork surface.
- the polymer of this layer may be selected to allow a sliding action of the cork stopper in the neck of the bottle.
- Cork which has a TCA content determined by blank.
- a granulate is coated and extracted.
- An approximately 30% aqueous solution of an amido-amino siloxane is used (Tubingal FAM, CHT Beitlich GmbH), which contains about 10% of a fatty alcohol ethoxylate as emulsifier.
- the solution is a low-viscosity emulsion ( ⁇ 400 mPas, 20 0 C, Brookfield RVT, spindle 2, 50 U / min.).
- cork granulate having a particle size of between 2 to 8 mm together with 20 ml of a coating agent 1 or 2 ml of a coating agent 2 are combined and rolled in a drum. After 30 minutes, the coated cork granules are removed and dried at 80 ° C. for 7 hours. The cork granules are weighed and the weight gain indicates the amounts of coating absorbed.
- the other coating is applied according to the same procedure.
- the coated cork granules are placed in a beaker and treated with a 12% solution of ethanol in water. The amount is chosen so that 67 ml of aqueous solution is used on 5 g of cork granules. The material is kept below the liquid surface.
- the liquid phase is filtered off and determines the content of TCA by solid phase extraction.
- Siloxane coating (0.08 g / g cork granules) 7
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Closures For Containers (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
- Chemical And Physical Treatments For Wood And The Like (AREA)
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102006013102A DE102006013102A1 (de) | 2006-03-20 | 2006-03-20 | Diffusionsreduzierende Korkbeschichtung |
| PCT/EP2007/001057 WO2007107209A1 (de) | 2006-03-20 | 2007-02-08 | Diffusionsreduzierende korkbeschichtung |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP2001759A1 true EP2001759A1 (de) | 2008-12-17 |
| EP2001759B1 EP2001759B1 (de) | 2010-09-29 |
Family
ID=38042822
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP07711466A Not-in-force EP2001759B1 (de) | 2006-03-20 | 2007-02-08 | Diffusionsreduzierende korkbeschichtung |
Country Status (6)
| Country | Link |
|---|---|
| EP (1) | EP2001759B1 (de) |
| AT (1) | ATE482890T1 (de) |
| DE (2) | DE102006013102A1 (de) |
| ES (1) | ES2355314T3 (de) |
| PT (1) | PT2001759E (de) |
| WO (1) | WO2007107209A1 (de) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2956058B1 (fr) | 2010-02-08 | 2012-02-03 | Jacques Granger | Traitement de bouchons en liege naturel et bouchons obtenus par ledit traitement |
| PT105500A (pt) * | 2011-01-24 | 2012-07-24 | Amorim & Irmaos S A | Processo de aplicação de revestimento polimérico em rolhas de cortiça |
| CN105857879A (zh) * | 2016-06-17 | 2016-08-17 | 河北百林软木制品有限公司 | 一种降低瓶装葡萄酒漏酒率的软木塞处理工艺 |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1103003B (de) * | 1960-02-22 | 1961-03-23 | C A Greiner & Soehne K G | Verfahren zum Impraegnieren von Korken mit thermoplastischen Kunstharzen |
| US6022816A (en) * | 1994-03-18 | 2000-02-08 | Dewco Investments Pty Ltd. | Closure |
| AUPP989399A0 (en) * | 1999-04-22 | 1999-05-13 | Vinpac International Pty Ltd | Treated closures 2 |
| US20040178168A1 (en) * | 2001-07-04 | 2004-09-16 | Matheson Norma Catherine | Container stopper |
| US20040166345A1 (en) * | 2003-02-26 | 2004-08-26 | Wicht Charles A. | Processes and articles useful for preventing cork taint in beverages |
| US7579002B2 (en) * | 2003-12-05 | 2009-08-25 | Wisconsin Alumni Research Foundation | Method for improving body weight uniformity and increasing carcass yield in animals |
-
2006
- 2006-03-20 DE DE102006013102A patent/DE102006013102A1/de not_active Withdrawn
-
2007
- 2007-02-08 AT AT07711466T patent/ATE482890T1/de active
- 2007-02-08 WO PCT/EP2007/001057 patent/WO2007107209A1/de not_active Ceased
- 2007-02-08 PT PT07711466T patent/PT2001759E/pt unknown
- 2007-02-08 EP EP07711466A patent/EP2001759B1/de not_active Not-in-force
- 2007-02-08 DE DE502007005201T patent/DE502007005201D1/de active Active
- 2007-02-08 ES ES07711466T patent/ES2355314T3/es active Active
Non-Patent Citations (1)
| Title |
|---|
| See references of WO2007107209A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| DE102006013102A1 (de) | 2007-09-27 |
| ATE482890T1 (de) | 2010-10-15 |
| ES2355314T3 (es) | 2011-03-24 |
| PT2001759E (pt) | 2010-10-12 |
| EP2001759B1 (de) | 2010-09-29 |
| DE502007005201D1 (de) | 2010-11-11 |
| WO2007107209A1 (de) | 2007-09-27 |
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