• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:

    公开号:BE1020895A3
    申请号:E201300473
    申请日:2013-07-05
    公开日:2014-07-01
    发明作者:Cornelis Lubertus Lucien Verweel；Lubertus Bastiaan Verweel
    申请人:Papierindustrie Maasmond B V；
    IPC主号:
    专利说明:

    Improved sealed paper sachet
    FIELD OF THE INVENTION
    The invention relates to the field of packaging, in particular permeable packaging, specifically packaging made from paper. In particular, the invention relates to paper, sealed sachets containing material that must be slowly dissolved.
    BACKGROUND
    Packaging that serves to dissolve their contents in a liquid is widely used; the most well-known packaging for this purpose is the tea bag. In order to prevent wastage of the contents, the tea bag has in the past been closed with a metal staple or with a wire knot, but this proved to be inadequate and has been replaced by a sealing mechanism for which the tea bag material was provided with a dispersed thermoplastic material, such as fibers of polyethylene, polyvinyl chloride, polypropylene or copolymers thereof. This material was used not only for tea, but also for preparations for cut flowers, as disclosed in WO 01/96206.
    However, the tea bag sachets according to WO 01/96206 have the disadvantage that they are relatively expensive and that they have plastic components, which - in principle - is harmful to the environment if the sachet ends up in the waste stream. Normal paper has the disadvantage that it is not sufficiently permeable, so that a water-soluble component present in the sachet will not get into solution and / or will not diffuse from the sachet into the solvent.
    As a result, there is still a need for a cheap sachet made from more environmentally friendly material.
    SUMMARY OF THE INVENTION
    The invention now relates to a sachet comprising: a. A closed bag formed from water-permeable paper; and B. a solid present in the bag, characterized in that the paper has an air permeability of at least 0.8 Lm ^ .s1 tested in a Textest FX 3300III air permeability tester, more preferably more than 1 and most preferably between 0 8 and 5 Lm ^ .s1. To achieve such air permeability, the paper preferably has a porosity of 500-1000 ml / min.
    Such a sachet preferably has a weight of 20 - 60 g / m2 and a thickness of 40 - 80 µm and more preferably a weight of about 40 g / m2 and a thickness of about 60 - 70 µm. In a preferred embodiment, the sachet comprises paper that is recycled from sodium kraft (Natronkraft) paper.
    In a further preferred embodiment, the paper comprises an area intended for sealing. Said region is preferably provided with an adhesive which is suitable for hot-seal sealing or, alternatively, an adhesive which is suitable for cold-seal sealing. In a further preferred embodiment, one side of the ready paper is provided with an adhesive while the paper still retains sufficient porosity, that is, the porosity characteristics still fall within the above-mentioned range. In a further preferred embodiment, the solid present in the bag is at least partially water-soluble. In yet another preferred embodiment, one side of the paper is suitable for printing.
    The invention also comprises a method for producing a sachet according to the invention, comprising the steps of a. Optionally printing with text and / or figures of a side of paper, said paper having an air permeability of at least 0.8 Lm tested in a Textest FX 3300III air permeability tester, more preferably more than 1 and most preferably between 0.8 and 5 Lm ^ .s1; b. applying glue to one side of the paper; c. folding or cutting two identical sachet halves of said paper; d. partially sealing said sachet halves together to form an open sachet; e. filling said open sachet with a solid; and f. closing the sachet by sealing.
    In a preferred embodiment, a string with a label attached to it is introduced into the seal during sealing.
    DETAILED DESCRIPTION
    In this application the term sachet is used for a closed bag comprising an at least partially water-soluble composition, which composition is preferably in powder form.
    Accordingly, the sachet can be placed in water after which the composition in the sachet will slowly dissolve and withdraw from the sachet.
    Such a sachet is particularly useful in applications in which a connection must be dissolved and where the time required for the dissolution is not critical. The most important example in this regard, for which the sachet has been specially developed, is the provision of nutrients or other compounds to cut flowers. However, it is also envisaged that the sachets can be used as 'tea bags' for preparing tea or other brew that can be prepared by extracting leaves or other parts of plants (roots, stems, etc.) · They can also be used for mixing (extracts of) herbs or spices in aqueous solutions, in particular in cases where the herbs or spices should not remain in the solution (such as cloves or bay leaves). In those cases, the sachets preferably have a small string or cord with which they can easily be removed from the solution. They can also be used in a less liquid but more moist environment, such as potting soil or compost, to provide nutrients (fertilizers) and / or agricultural crop protection agents such as insecticidal or fungicidal compounds.
    According to the invention, a suitable paper for the above applications is a paper having an air permeability of at least 0.8 Lm 2 .s1 tested in a Textest FX 3300 III air permeability tester (Testex Instruments, Schwerzenbach, Switzerland) and more preferably more than 1 and most preferably between 0.8 and 5 Lm · .s1. Such air permeability can be achieved with a porosity of the paper of about 500 - 100 ml / min. This porosity is the result of a measurement with a Bendtsen porosimeter, for example according to ISO 5636-3 using an air pressure of 1.47 kPa and measurement over an area of 10 cm2. Bendtsen porosimeters are available, for example from Fibertec (India).
    Such a porosity indicates that the openings in the paper are sufficient to allow passage of dissolved (small) molecules. Furthermore, it is preferable that the openings in the paper are relatively small to prevent outflow of the solid, often in powder form, before the sachet is immersed in the liquid, for example to prevent outflow of the solid in the sachet during storage or transport. This is again one of the disadvantages of the non-plastic sachets on the market today, such as the sachets made from tea bags of paper, from which the powder of the solid inside is easily spilled. This causes the presence of small dust particles in the atmosphere during storage and transport of the sachets, which - of course depending on the nature of the solid material packed in the sachets - can be harmful to the health of the people handling the material. Naturally, any waste of the solid also constitutes a loss of value. Therefore, the air permeability is preferably less than 5 L.m.s1.
    To enable the paper to be handled, it preferably has a weight of 20 - 60 g / m2 and a thickness of 40 - 80 µm. More specifically, the paper will preferably have a weight of about 40 g / m2 and a thickness of about 60 - 70 µm. These weight and thickness parameters ensure easy handling of the paper, which can be provided on rolls or in any other way paper is normally handled and transported.
    Preferably the paper is recycled Natronkraft paper. This paper is made using the kraft process (also known as kraft pulp formation or sulphate process), which is a technology for the conversion of wood into wood pulp that consists of almost pure cellulose fibers. The process involves treating wood chips with a mixture of sodium hydroxide and sodium sulfide, known as white liquid, in which breaks the bonds that bind lignin to the cellulose. Natronkraft paper is a type of paper that is commercially available and that is used as packing paper. In most cases it is evenly brown, although there are also versions in which the paper has stripes of lighter brown bands. It is particularly useful for packaging and packaging because it has a relatively high tear resistance.
    Use is preferably made of Natronkraft paper that has been wholly or partially recycled. The recycling of (Natron) kraft paper lowers the quality of the paper, but to a height that is advantageous for the present invention: recycling increases the air permeability of the paper.
    In order to retain the contents of the sachet until the sachet is placed in a liquid and the solid has dissolved and spreads out of the sachet in the dissolved state, the sachet should preferably be sealed.
    To obtain a correct seal, at least a part of the paper must be prepared with sealant and after filling the sachet, the sealant must be activated, the sachet closing. The sealant can be any glue normally used in the paper industry to seal paper, for example to make bags. Preferably, the glue is a water-based glue which can be used for gluing through hot-sealing or cold-sealing.
    The technology for cold seal adhesives dates from many years. The formulations for these products usually contain natural rubber latex, which is the most important component. Sticky resins, plasticizers, stretchers or other ingredients can be added. Recent technology relates to the use of copolymers of vinyl acetate and ethylene mixed with natural rubber latex. Despite this modification, the resulting cold seal adhesives are provided as aqueous materials. In use, a film of cold seal glue is applied to each of the substrates, in this case the halves of the sachet, which will stick to each other. The glue undergoes a drying treatment to remove the aqueous carrier.
    The unique thing about cold seal gluing is that they all stick to themselves. If a substrate coated with a cold seal glue comes into contact with another substrate coated with the same cold seal glue, binding will take place when simple pressure is applied. This differs from a heat seal glue that requires glue on only one substrate but must have a heat source and pressure to effect the bonding. Nonetheless, heat seal can be applied to both sides of the seal, which minimizes the application of plaque on each side (thereby enabling better porosity).
    The amount of pressure applied in the actual bonding process will make a considerable difference. More pressure generally equals larger binding values. Time can also play a role in binding values, increasing slightly after the glue starts binding.
    For the present invention, the normal types of adhesives available for paper sealing can be used as long as, after sealing, they do not easily lose their gluing properties over time.
    That means that once sealed, the sachet must remain sealed.
    In one embodiment, the slice required for the seal is provided only at those places where it is actually needed. This means that a mask (adhésivage à façon) is advantageously used in the production process of the sachet to determine the places where the slice is to be applied. Such a mask will also allow better and more reliable positioning of the area that can be used to print text and / or images on the surface of the paper. Furthermore, it means that generally less wafer will be needed and that the porosity of the paper will remain high because it will not be limited by the wafer.
    In another embodiment, the entire paper is coated on one side with glue or paste, provided that such a one-sided coating does not impair the permeability characteristics of the sachet. As can be seen from Table 1, it is possible to use slab while maintaining a permeability according to the invention.
    Covering one side of the paper with glue has advantages in processing the paper into sachets: when applying the glue to the paper, no special care has to be taken that some parts of the paper surface must remain free of glue. Furthermore, since there is no predetermined area for sealing, any area can be used, which means that the paper that has been pre-treated with glue can be used for any type and size of sachet. Another advantage of this method of applying paste is the uniformity of the resulting paper: when the paper is rolled and stored in rolls, or transported in the sachet production process, it has a more or less constant thickness over the entire width and length of the paper.
    A side of the sachet, i.e. the side on which no glue is applied, and which side will ultimately form the outer customer of the sachet, can be used for printing. Any form of printing can be applied to said surface, but in general the usual ink printing methods will be most advantageous. Of course, as the person skilled in the art will understand, the printing can consist of advertisements, brands and the like, but also of the instructions for use of the sachet and an indication of the contents of the sachet.
    The basic shape of the sachet will be rectangular, but sachets in other shapes (triangles, pyramid, etc.) can also be produced. It is also possible that the sachet is in the form of a rod, i.e. a cylinder of paper, closed at the top and bottom (preferably by seals). Even a spherical sachet or sachet in certain forms (eg forms of animals, things) can be produced. It is anticipated that the shape of the sachet can be advantageous for brand marketing or for display in stores.
    One of the most important advantages of the sachets according to the invention is that they are fully recyclable: no residual waste is formed by the sachet itself. This means that the sachets are an inexpensive and environmentally friendly alternative to all plastic sachets (made of polypropylene, polyethylene, etc.) that are currently used for packaging light, dry goods, even in cases where the porosity of the sachet is not is required. Examples of such applications are sachets for packaging candy and confectionery, sachets (or sticks) for sugar, sachets for small toys and paper contents (such as stickers, stamps and collectors' plates).
    The invention also includes a method for producing the sachets of the invention. The most important advantage of the production process is that it can be implemented on existing machinery in packaging production facilities for paper or foil. For production, paste is applied to one side of a roll of paper. As discussed above, the application of wafer over the entire surface of the paper or according to a mask for a predetermined pattern can take place on the paper. The other side of the paper is left blank and pre-printed. In some cases, printing is done simultaneously with the packaging of the product. After the slab has been applied, the paper is folded in such a way that the later back and the later front of a sachet are laid on top of each other with the glued side facing each other. Then the sachet is glued at least partially with either the hot seal or the cold seal method, thus forming a kind of bag. This "bag" is then filled with contents (powder, sugar, tea leaves or any other material that needs to be packed) and after filling the open side is sealed. Optionally, at the time of sealing, a string or thread can be sealed into the seal to which a label is attached (as is known from normal tea bags).
    In the case of rod production, cylinders are rolled from the paper and sealed in the longitudinal direction and at the bottom, after which the filling can be introduced from the top. After filling, the top will be sealed tight.
    As will be appreciated by those skilled in the art, it is possible in the production process described above to produce all sizes and shapes of the sachets of the invention.
    EXAMPLE
    Various paper samples were tested in a Textest FX 3300 III air permeability tester. The tested area of each paper sample was 20 cm 2, while the applied pressure was 200 bar. Table 1 shows the results of 8 individual samples and the average in L. m ^ .s1.
    From these results, it can be deduced that the standard 40 g / m2 Natronkraft paper, which has been found to be unusable for the present invention, has an average air permeability of less than 0.8 L.m.s1.
    << i
    权利要求:
    Claims (13)
    [1]
    A sachet comprising: a. A closed bag formed from water-permeable paper, and b. a solid present in the bag, characterized in that the paper has a weight of 20 - 60 g / m2 and wherein the paper has a thickness of 40 - 80 and that the paper has an air permeability of at least 0, 8 Lm ^ .s1 tested in a Textest FX 3300 III air permeability tester, more preferably more than 1 and most preferably between 0.8 and 5 Lm ^ .s1. The sachet of claim 1, wherein the porosity is from 500 to 1000 ml / min.
    [2]
    Sachet according to claim 1 or 2, wherein the paper has a weight of approximately 40 g / m2 and a thickness of approximately 60 - 70 µm.
    [3]
    Sachet according to any one of the preceding claims, wherein the paper is recycled from sodium kraft (Natronkraft) paper.
    [4]
    Sachet according to one of the preceding claims, characterized in that it comprises an area which is intended for sealing.
    [5]
    Sachet according to claim 5, wherein said area is provided with glue.
    [6]
    Sachet according to claim 6, wherein said glue is an adhesive suitable for hot-seal seals.
    [7]
    8. Sachet according to claim 6, wherein said glue is an glue suitable for cold-seal seals.
    [8]
    9. Sachet according to any one of claims 5-8, wherein one side of the total paper is provided with glue, while maintaining a sufficient porosity.
    [9]
    Sachet according to any of claims 1 to 9, wherein the solid present in the bag is at least water soluble.
    [10]
    Sachet according to one of claims 1 to 10, wherein one side of the paper is suitable for printing.
    [11]
    A method for producing a sachet according to any of claims 1-11 comprising the steps of: a. Optionally printing with text and / or figures a side of paper, said paper having a weight of 20 - 60 g / m2 and has a thickness of 40 - 80 µm and an air permeability of at least 0.8 Lm ^ .s1 tested in a Textest FX 3300 III air permeability tester, more preferably more than 1 and most preferably between 0.8 and
    [12]
    5 L. m ^ .s1; b. applying glue to one side of the paper; c. folding or cutting two identical sachet halves of said paper; d. partially sealing said sachet halves together to form an open sachet; e. filling said open sachet with a solid; and f. closing the sachet by sealing.
    [13]
    A method according to claim 12, wherein a cord with an attached label is introduced into the seal during sealing.
    类似技术:
    公开号 | 公开日 | 专利标题
    US9345267B2|2016-05-24|Oral pouch product with flavored wrapper
    AU2006245434B2|2012-02-02|Tobacco pouch product
    TWI436742B|2014-05-11|Portion tabacco product
    US20070261707A1|2007-11-15|Tobacco pouch product
    EP1037741B1|2004-09-01|Sealable sterilising packaging material
    RU2609218C2|2017-01-31|Container with adhesive
    RU2571056C2|2015-12-20|Fluid dispenser system to be used in making tobacco pelletised articles
    EP2799365B1|2016-07-06|Freshening cloth, in particular for floral bouquets and potted plants
    WO2010007312A2|2010-01-21|Method of manufacturing cellular films directly
    CN106061722A|2016-10-26|Method for manufacturing corrugated cardboard with improved air permeability and breathability
    TW200415011A|2004-08-16|Biocide containing laminate as tape or packaging material
    BE1020895A3|2014-07-01|IMPROVED SEALED PAPER SACHET.
    CN106574447A|2017-04-19|Twisting paper
    RU2557516C2|2015-07-20|Device to be used during formation of packed tobacco product
    CN206766695U|2017-12-19|A kind of packing box repeatedly with closing function for being easy to open
    CN105454414A|2016-04-06|Grape fresh powder and preparation method thereof
    WO2007144687A1|2007-12-21|Non-tobacco pouch product
    AU2019366466A1|2021-06-10|Multilayer water-dispersible articles
    CN1436142A|2003-08-13|Package comprising feeding materials for cut flowers
    CN105540043A|2016-05-04|Controlled release type grape preservative paper and preparation method thereof
    CN209208209U|2019-08-06|A kind of overlay film mildew resistant slice
    CN208412666U|2019-01-22|Blister packaging suitable for a small amount of water-soluble supplement capsule
    CN106915561A|2017-07-04|A kind of packing box with closing function repeatedly for being easy to open
    CN103991650A|2014-08-20|Package structure of tea bag and tea bag thereof
    CN102211688B|2012-11-21|Far infrared insect prevention rice packing material made of loess and preparation method thereof
    同族专利:
    公开号 | 公开日
    DE102013011271B4|2019-05-09|
    DE102013011271A1|2014-01-09|
    NL2011107C2|2014-01-07|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US2313696A|1941-03-14|1943-03-09|Pneumatic Scale Corp|Tea bag and method of making the same|
    US2335159A|1941-09-30|1943-11-23|Ivers Lee Co|Adhesively sealed package|
    DE3935121A1|1988-10-25|1990-04-26|Frank Steldermann|Bag for holding tea leaves etc. - has rectangular portion of filter fabric formed, esp. fleece made of polypropylene or viscose|
    DE29722628U1|1997-12-22|1999-04-15|Klar Paul Gerhard Dr Ing|Tea bags|
    WO2001096206A1|2000-06-13|2001-12-20|Pokon & Chrysal B.V.|Package comprising feeding materials for cut flowers|
    WO2002031263A1|2000-10-09|2002-04-18|Dynamic Products Limited|A beverage infusion package with improved freshness and reduced dusting|
    DE9318405U1|1993-12-01|1994-01-27|Schoeller & Hoesch Papierfab|Filter material|
    DE19719807A1|1997-05-13|1998-11-19|Bayer Ag|Heat sealable filter material with biodegradable polymers|
    DE19931402A1|1999-07-07|2001-01-11|Schoeller & Hoesch Papierfab|Biodegradable filter material for production of tea or coffee bags contains a cellulose derivative plasticized with a plasticizer, e.g. glycerol, or with a biodegradable polymer, e.g. aliphatic polyester|
    AU2005324945A1|2005-01-14|2006-07-20|Unilever Plc|Sachets comprising plant sterol|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    NL2009135|2012-07-05|
    NL2009135|2012-07-05|
    [返回顶部]