• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
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    • 专利摘要:
    13 ABSTRACT An active moisture control material comprising a fiber based material and atleast one active additive, wherein said active additive is adapted to controlmoisture transfer in the active moisture control material, and wherein saidmoisture control material is produced in a paper or board making process,wherein the active additive is incorporated into said active moisture controlmaterial. Elected for publication: Fig. 1
    公开号:SE1551447A1
    申请号:SE1551447
    申请日:2015-11-09
    公开日:2017-05-10
    发明作者:SIITONEN Simo；Nevalainen Kimmo
    申请人:Stora Enso Oyj；
    IPC主号:
    专利说明:

    ACTIVE MOISTURE CONTROL MATERIAL FOR PACKAGING Technical field The present document relates to an active moisture control material.
    More particularly, the present disclosure relates to an active moisture controlmaterial for a packaging where the moisture level inside packaging (e.g.cigarette or dry food packaging) may be stabilized so that product inside willbe stored at constant humidity before and after opening the package.
    Backgroundln many types of packages a barrier for moisture, aroma, oxygen etc. is needed to preserve the quality of the product which is contained in thepackage. Usually this barrier may be a so called a passive barrier, wherethere are separate barrier layers in the structure, in e.g. a cigarette packagethere is usually a plastic film wrapping combined with an aluminum foil oraluminum laminate structures. This means that existing packages arecomplex, having several material layers with separate barrier layer bothoutside and inside of the package.
    After the opening of the package, it is a further challenge to keep theoriginal, moisture level, or as close to the original as possible, inside thepackaging. This is very critical for moisture sensitive products like cigarettes.The moisture level of cigarette should be around 10-15% during the wholepackage shelf life, and also after opening the package. ln today's packages itis evident that moisture level of cigarette will change dramatically after firstopening of the package because all the package barrier layers are destroyed,and the reclosing system is often not protecting enough. Average usage timefor single cigarette package (20 cigarettes), after the first opening, is betweenone to five days and during that period moisture level inside the package andthus of the cigarette will change and that is not acceptable in quality wise.
    Various solutions to be able to provide a more active moisture controlhave been suggested in the art. ln for instance US4997082A a humidistat padis included into the packaging. ln US2013292279A a cigarette package is disclosed in which a layer ofa fibrous material having a moisture barrier layer embedded within the layerof the fibrous material or coated on the outside of the fibrous layer. Thebarrier layer comprises a polymer layer, which has limited capacity forabsorbing moisture. ln WO09106493A1 a packaging with humidity control is disclosed, thispackaging has a laminate structure, and a moisture-containing layer isinterposed between two polymeric layers. The moisture-containing layer maybe a paper saturated with water or aqueous salt solution, which can givecontrol over the evaporation. The polymeric layers may be provided with tear-off strips to expose the moisture-containing layer inside the container, in orderto hydrate the tobacco inside.
    There is thus a need to for being able to produce a packaging whichcan actively control the humidity inside of the package which is further moreeasily manufactured or which does not require several layers or laminatestructures.
    Summarylt is an object of the present disclosure, to provide an improved material for active moisture control, which eliminates or alleviates at leastsome of the disadvantages of the prior art materials.
    More specific objects include providing a packaging formed from themoisture control material and methods for manufacturing the moisture controlmaterial.
    The invention is defined by the appended independent claims.Embodiments and examples are set forth in the appended dependent claimsand in the following description and drawings.
    According to a first aspect there is provided an active moisture controlmaterial comprising a fiber based material and at least one active additive,wherein said active additive is adapted to control moisture transfer in theactive moisture control material, and wherein said moisture control material isproduced in a paper or board making process, wherein the active additive isincorporated into said active moisture control material.
    By active moisture control material is meant an active material whichcan absorb moisture, such as water, from the environment, or preventmoisture for instance escaping a closed compartment, or even providemoisture, i.e. desorption of moisture, to the environment or the compartment itencloses or is adjacent to. This material is thus not a passive barrier material.
    The active additive may thus be added for instance in the head box orin the stock solution, or through surface sizing or coating, such that the activeadditive is incorporated into the active moisture control material, i.e. into the 3 fiber material, itself as in Contrast to where a barrier material is formed bysoaking a fiber material in a salt solution.
    This material may thus form a base packaging material in itself, incontrast to having a separate moisture control or humidifier material in apackaging, such as for instance a cigarette box. This means that it may beeasier to manufacture for instance a cigarette box, and also, after it has beenopened it may be possible to have an improved control over the humidityinside the packaging.
    The active additive may be incorporated during the production of said material in said paper or board making process or in a foam forming process.
    This means that the material may be produced in any conventionalpaper or board making process. Foam forming may improve moisturecontrolling properties, in particular the moisture absorbance capacity of thematerial. ln the alternative the active additive may be incorporated in aseparate process step after board making process.
    The active additive may be any one of sodium chloride, calciumchloride and potassium chloride, a sodium silicate, phosphates and asuperabsorbent polymer or a mixture thereof. The superabsorbent polymermay be any one of a synthetic super absorbent polymer, a polysaccharidebases super absorbent polymer and a polyaminoacid based super absorbentpolymer.
    The fiber material may be any one of a paper, paper board,microfibrillated cellulose.
    The material may have a thickness in the range of 20 um to 3 mm, orin the range of 40 um - 1000 u, or in the range of 40 um to 500 um.
    The thickness of the active moisture control material may thus beadapted to provide the required moisture balance or control of the moisturebalance.
    The active additive may be provided at well-defined areas of the fibermaterial, such that a moisture control pattern is provided.
    The active moisture control material may further be provided with apassive barrier material.
    The passive barrier layer may be laminated or coated onto the activemoisture control material. lt will create barrier protection, and may control inwhich direction moisture can transfer and how fast the moisture can betransferred. The passive barrier may also further improve the protection of apacked product from outside conditions, such as a high or low humidity environment. The passive barrier material need only be applied on one sideof the active control material, i.e. the side facing the outside environment offor instance a packaging. The other side may be arranged in direct contact with the packaged material, with no further need for coatings or barrier layers.
    The passive barrier may comprise any one of a synthetic or renewablepolymer.
    The active moisture control material may be provided with a furtherpaper or board layer, thereby forming a laminate structure.
    The laminate structure may thus comprise the following structureboard/passive barrier/moisture control material, or alternatively board/moisture control material, where the active control material is placed inconnection with the inside of a package.
    According to a second aspect there is provided a packaging formedfrom the active moisture control material according to the first aspect, thusforming an active moisture control packaging.
    By active moisture control packaging is meant a packaging or apackaging material which is adapted for holding moisture sensitive materialstherein. These types of packaging or packaging materials are used in forinstance cigarette packages, or for various types of food.
    This means that for instance a cigarette package or box can be formedby using the active moisture control material as a base packaging or and ablank for the entire package, and the active moisture control material is thusenclosing the cigarettes, i.e. the fiber material can be directly against thepacked product. The active control material thus forms the main structure ofthe package. Conventionally cigarette boxes comprise several separatelayers to keep the moisture inside the package. With the active moisturecontrol material the moisture may already be in the material, thus providingthe required humidity for the packaged product, while still providing for aneasy way of manufacturing the package.
    The moisture control can thus be a fast process as there is no otherbarrier layer arranged on the inside of the packaging.
    By using the active moisture control material to form the packagingthere is not only provided a way of improving the control if the moisture insidethe package, not only during storage and transpiration, but also when thepackage has been opened, but also a way of producing a moisture controlpackaging in an easy manner. The moisture level inside packaging can thus 5 be stabilized (e.g. the cigarette or dry food packaging) so that product insidewill be stored at constant humidity before, and after, opening the package.
    The moisture control material can be tailored, with regards to the activeadditives and the thickness of the material, such that the packaging itselfprovides the required control if the speed and capacity of the absorptionand/or desorption of moisture inside the packaging. This also means, that theneed for introduce loose humidistat pad etc. for the moisture control isabolished.
    The packaging may alternatively be provided with an outside passivebarrier material, such as a plastic film or wrapping or an outside coating tokeep moisture inside the whole package and to protect it from externalcondition changes.
    The moisture control material may be pre-conditioned prior to theclosing of the package.
    By pre-conditioning stabilizing right moisture content to the packagingmaterial and also stabilizing right moisture content to the inside volume intothe package. This means that once the material has been pre-conditioned, noother humidifying measures need to be taken to ensure the correctenvironment for the packaged product. The pre-conditioning may take placejust before closing the package, but may also be made in connection with theproduction of the moisture control material or a blank for forming thepackaging.
    The packaging may further be provided with, or comprise, a passivebarrier layer.
    The packaging may even further be provided with, or comprise, anouter paper or board layer.
    The packaging thus forms a laminate structure, which may comprisethe following structure board/passive barrier/moisture control material, oralternatively board/ moisture control material, where the active controlmaterial is placed in connection with the inside of the packaging and theboard or paper layer is on the outside, to provide improved structural stiffnessto the packaging.
    According to a third aspect there is provided the use of the packagingaccording to the second aspect, for packaging any one of cigarettes,medicaments, cosmetics, electronics, metal products, apparel, shoes andfood.
    The packaging may essentially be used for all types of moisturesensitive products. The packaging could for instance be used for packagingclothes (apparel) or shoes to avoid using or decreasing use of anti-moldadditives.
    According to a fourth aspect there is provided a method formanufacturing an active moisture control material in a paper or board makingmachine, wherein the active moisture control material comprises a fibermaterial and an active additive, wherein the method is any one of an online,inline or offline paper or board making operation, and wherein the methodcomprises the steps of providing a fiber material; and adding said activeadditive into said fiber material, thereby forming the active moisture controlmaterial.
    The online paper or board making operation may comprises addingsaid active additive into said fiber material by any one of pulp mixtureprocess, surface sizing process and coating process.
    The offline paper or board making operation may comprise adding saidactive additive into said fiber material by any one of printing machinetechnology, coating technology, foam forming technology and impregnationtechnology.
    The method may further comprise providing said active control materialwith a moisture control pattern at well-defined areas of the material.
    By a moisture control pattern is meant that a well-defined area of themoisture control material is provided with the active additive, such that it isonly this area or pattern that has the active moisture control properties. Thismay be done by printing process or slot die coating etc. such that the activeadditive is provided at the well-defined areas.
    Brief description of the drawinqsThe present solution will now be described, by way of example, withreference to the accompanying schematic drawing.
    Fig. 1 illustrates a schematic perspective view of a packaging.
    Detailed description The invention relates to a fiber material into which an active componentis added during the manufacturing process of the fiber material. The fibermaterial may be used for applications such as packaging.
    The fiber material is, due to the addition of the active component oradditive, able to pick up, and release, moisture. lt is therefore an activemoisture control material. By adding the active component or additive to orinto the fiber material there is thus formed an active moisture control material.
    The moisture absorption and/or desorption may be based mainly on fibersand the active additives may boosting the effect. The fiber material may thuscreate a high enough capacity for moisture control.
    The fiber material may be any one of a paper, paper board,microfibrillated cellulose. The fiber material may essentially be any type ofweb type material, where fiber material is produced from non-fossile basedraw materials, and which is used in conventional paper or board makingprocesses. The fiber material may be any type of a cellulose based material.
    The active component or additive is thus adapted to control moisturetransfer in the active moisture control material.
    The active additive may be any one of sodium chloride, calciumchloride and potassium chloride, a sodium silicate, phosphates and asuperabsorbent polymer or a mixture thereof. The sodium silicate may be forinstance be NazOßSi, known as liquid glass or water glass. The salt may haveany suitable grade or form. The active additive may also be an additiveessentially only capable absorbing moisture such as silica gel, bentonite clay,molecular sieve, calcium oxide or calcium sulfate.
    The superabsorbent polymer (SAP) may be any one of a syntheticsuper absorbent polymer, a polysaccharide bases super absorbent polymerand a polyaminoacid based super absorbent polymer.
    Examples of synthetic SAP may be those produced from acrylicmonomers, such as acrylic acid (AA) or acryl amide (AM). One example of asynthetic SAP which can be added as an active additive is sodiumpolyacrylate.
    Examples of polysaccaride based SAP are carboxymethylcellulose(CMC) and hydroxyethylcellulose (HEC). One example is sodiumcarboxymethylcellulose.
    The active additive may also be a microfibrillated cellulose, which mayhave been modified.
    The active component or additive may be added to or into the fibermaterial in paper/board machine directly, i.e. in an online process, or in anoffline operation. ln the alternative the active additive may be incorporated in a separateprocess step after board making process Examples of an online operation may be for instance adding the activeadditive into the pulp mixture, either in a conventional way or through a socalled in-line production process. Online operation may further comprise anyone of a size press or coating unit. The online operation may also comprisefoam forming technologies. The foam forming may give a very thick structureof the material, which may enable a high capacity for moisture absorbance,especially compared to full plastic materials.
    Examples of offline operation may be printing machine technology, coatingtechnology, such as blade, rod, curtain, spray technologies, or impregnation,for instance through a size press.
    The active control material may be used as a blank or base packagingmaterial to for different types of packages. ln one examples, as shown by Fig. 1 the active control material may beused for a cigarette package 1. The package 1 has an inside 2, where thecigarettes (not shown) are placed and an outside 3.
    The inside 2 may thus comprise the active control material 4. ln oneexample the outside 3 comprises the active control material or alternatively anoutside passive barrier material 5.
    The passive barrier material 5 may be any one of a synthetic orrenewable polymer. Examples of synthetic polymers may be any one of lowdensity polyethylene (LDPE), high density polyethylene (HDPE),polypropylene (PP) and polyethylene terephthalate (PET). Examples ofrenewable polymeras may be so called green polyethylene (PE), greenpolyethylene terephthalate (PET), polylactic acid and polybutylene succinate(PBS). The passive barrier material may be applied onto the active controlmaterial during the manufacturing, for instance as a coating or film layer, oraftervvards as a detachable film.
    Examples of film application are film lamination, glue lamination,pressure sensitive lamination. The barrier layer may alternatively be appliedthrough dispersion, water or solvent based coating systems. lt may also beextrusion coated or extrusion laminated onto the active moisture controlmaterial. 9 The active moisture control material may have a thickness in the rangeof 20 pm to 3 mm, or in the range of 40 pm - 1000 p, or in the range of 40 pmto 500 pm. The moisture absorption capacity will depend in the thickness andbe higher with thicker material.
    The packaging formed from the active moisture control material maybe pre-conditioned prior to the closing of the package.
    This pre-conditioning may take place during converting the blank intothe packaging material or during filling of the packaging.
    The packaging comprising the active control material may be used forall types of moisture sensitive products, such as cigarettes, medicaments,cosmetics, electronics, metal products, apparel, shoes and food.
    The material or packaging may alternatively also be provided with apattern, or a so called moisture absorption pattern. ln some applicationsthere might be a need to have moisture absorption properties only at certainareas of the packaging or packaging material. The pattern may be achievedby offline operations e.g. printing process or slot die coating etc. such that theactive additive is provided at well-defined areas, or in a pattern of the fibermaterial. One of the advantages may be that there is less stiffness reductiondue to absorbed moisture in the package. ln addition to providing the active moisture control material with apassive barrier, it may also be provide with a paper or board layer in alaminate structure, i.e. board/passive barrier/moisture control material. Theactive moisture control material would be inside the package. This wouldprovide the advantage that stiffness to the package is generated mainly fromouter board/paper layer which would not be absorbing moisture to any greaterextent. ln view of the above detailed description of the present invention, othermodifications and variations will become apparent to those skilled in the art.However, it should be apparent that such other modifications and variationsmay be effected without departing from the spirit and scope of the invention.
    权利要求:
    Claims (20)
    [1] 1. An active moisture control material comprising a fiber based materialand at least one active additive, wherein said active additive is adapted tocontrol moisture transfer in the active moisture control material, and whereinsaid moisture control material is produced in a paper or board makingprocess characterized in that the active additive is incorporated into said active moisture controlmaterial.
    [2] 2. The active moisture control material as claimed in claim 1 whereinthe active additive is incorporated during the production of said material insaid paper or board making process or in a foam forming process.
    [3] 3. The moisture control material as claimed in any one of claims 1 or 2,wherein the active additive is any one of sodium chloride, calcium chlorideand potassium chloride, a sodium silicate, phosphates and a superabsorbentpolymer or a mixture thereof.
    [4] 4. The moisture control material as claimed in any one of claims 1 or 2,wherein the active additive is any one of silica gel, bentonite clay, a molecularsieve, calcium oxide or calcium sulfate.
    [5] 5. The moisture control material as claimed in claim 3, wherein thesuperabsorbent polymer is any one of a synthetic super absorbent polymer, apolysaccharide bases super absorbent polymer and a polyaminoacid basedsuper absorbent polymer.
    [6] 6. The moisture control material as claimed in any one of the precedingclaims, wherein said fiber material is any one of a paper, paper board,microfibrillated cellulose.
    [7] 7. The active moisture control material as claimed in any one of thepreceding claims, wherein the material has a thickness in the range of 20 umto 3 mm, or in the range of 40 um - 1000 u, or in the range of 40 um to 500um. 11
    [8] 8. The active moisture control material as claimed in any one of thepreceding claims, wherein the active additive is provided at well-defined areasof the fiber material, such that a moisture control pattern is provided.
    [9] 9. The active moisture control material as claimed in any one of thepreceding claims, wherein said material is further provided with a passivebarrier material.
    [10] 10. The active moisture control material as claimed in claim 9, whereinsaid passive barrier comprises any one of a synthetic or renewable polymer.
    [11] 11. The active moisture control material as claimed in any one of thepreceding claims, wherein the material is further provided with a further paperor board layer, thereby forming a laminate structure.
    [12] 12. A packaging formed from the active moisture control material asclaimed in any one claims 1 to 8, thus forming an active moisture controlpackaging.
    [13] 13. The packaging as claimed in claim 12, wherein said moisturecontrol material is pre-conditioned prior to the closing of the package.
    [14] 14. The packaging as claimed in any one of claims 12 or 13, whereinthe packaging is further provided with, or comprises, a passive barrier layer.
    [15] 15. The packaging as claimed in any one of claims 12 to 14, whereinthe packaging is further provided with, or comprises, an outer paper or boardlayen
    [16] 16. The use of the packaging as claimed in any one of claims 12 to 15,for packaging any one of cigarettes, medicaments, cosmetics, electronics,metal products, apparel, shoes and food.
    [17] 17. A method for manufacturing an active moisture control material in apaper or board making machine, wherein the active moisture control materialcomprises a fiber material and an active additive, wherein the method is any 12 one of an online, inline or offline paper or board making operation, andwherein the method comprises the steps of: providing a fiber material; and adding said active additive into said fiber material, thereby forming theactive moisture control material.
    [18] 18. The method as claimed in claim 17, wherein the online paper orboard making operation comprises adding said active additive into said fibermaterial by any one of pulp mixture process, surface sizing process andcoating process.
    [19] 19. The method as claimed in claim 17, wherein the offline paper orboard making operation comprises adding said active additive into said fibermaterial by any one of printing machine technology, coating technology, foamforming technology and impregnation technology.
    [20] 20. The method as claimed in claim 19, wherein the method furthercomprises providing said active control material with a moisture controlpattern at well-defined areas of the material.
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    US20200063372A1|2018-08-23|2020-02-27|Eastman Chemical Company|Highly absorbent articles|SE539751C2|2015-11-09|2017-11-14|Stora Enso Oyj|Active moisture control material for packaging and a method for production thereof|
    GB2582508B|2017-11-29|2022-02-16|Kimberly Clark Co|Fibrous sheet with improved properties|
    CN109533650A|2018-11-05|2019-03-29|冷朝阳|A kind of aerosol generates the packaging of product|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    SE1551447A|SE539751C2|2015-11-09|2015-11-09|Active moisture control material for packaging and a method for production thereof|SE1551447A| SE539751C2|2015-11-09|2015-11-09|Active moisture control material for packaging and a method for production thereof|
    RU2018121329A| RU2726550C2|2015-11-09|2016-11-08|Active moisture control material for packing|
    US15/774,231| US11180310B2|2015-11-09|2016-11-08|Active moisture control material for packaging|
    BR112018009415A| BR112018009415A2|2015-11-09|2016-11-08|active moisture control material for packaging|
    MX2018005601A| MX2018005601A|2015-11-09|2016-11-08|Active moisture control material for packaging.|
    CN201680065505.3A| CN108350662A|2015-11-09|2016-11-08|Active water sub-control prepared material for packaging|
    EP16863756.9A| EP3374566A4|2015-11-09|2016-11-08|Active moisture control material for packaging|
    PCT/IB2016/056706| WO2017081600A1|2015-11-09|2016-11-08|Active moisture control material for packaging|
    KR1020187016298A| KR20180082522A|2015-11-09|2016-11-08|Active moisture control material for packaging|
    PH12018501007A| PH12018501007A1|2015-11-09|2018-05-08|Active moisture control material for packaging|
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