• 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:
    Summary (Figure 1) Packaging laminate (10) for a packaging container receives a liquid fermented milk product, such as film milk, yoghurt and crème fraiche. The packaging laminate (10) has a layer (11) of paper and outer liquid-tight layers (12,13) on the sides of the paper layer (11)! One outer layer (13) of the packaging laminate (10) has a surface coating (14) of whey protein.
    公开号:SE1350883A1
    申请号:SE1350883
    申请日:2013-07-16
    公开日:2015-01-17
    发明作者:Thorbjörn Andersson；Kristina Hansson；Marie Skepö
    申请人:Tetra Laval Holdings & Finance；
    IPC主号:
    专利说明:

    TECHNICAL FIELD The present invention relates to a packaging laminate for a packaging container, which packaging laminate has a layer of paper and outer liquid-tight layers on the dead sides of the paper layer. The invention further relates to a packaging container produced by the packaging laminate for a liquid-shaped fermented milk product.
    Background of the Invention It is possible to package and transport liquid-shaped fermented milk products, such as film milk, yoghurt and creme fraiche, in ready-made disposable consumer packages. A large group of these disposable packages are made of a packaging laminate having a rigid but foldable layer of paper and outer liquid-tight layers of polyethylene, preferably a low density polyethylene, on the sides of the paper layer. Such packaging containers are now manufactured on an industrial scale with the help of modern rational packaging machines which, either from a web or ten pre-made sheets of packaging laminate, both shape, fill and seal finished packaging containers.
    From a web of, for example, the packaging laminate, filled sealed packaging containers are made by first transforming the web into a tube by joining the longitudinal edges of the web into a longitudinal water-lacquered overlapping joint by heat sealing. The tube is filled with the actual liquid-shaped fermented milk product and divided into contiguous filled packaging units by repeated sealing of the tube across the long axis of the tube below the product level of the tube. The packaging units are separated from each other by cuts in the transverse sealing areas and are finally given the desired geometric shape, usually parallelepipedic, by at least one further forming operation.
    Correspondingly, filled sealed packaging containers are made from a substantially rectangular, planar-weight tubular blank of the packaging laminate by first raising the blank into an open tubular container capsule. One open end of the container canister (eg bottom end) is closed by folding and heat-sealing foldable duct panels at the bottom end of the container canister. The bottom-provided container capsule is filled with the current liquid-shaped fermented milk product through its open spirit and is then closed by folding and sealing the corresponding foldably connected duck panels at the top of the container capsule. A packaging container of the known type, whether manufactured from a web or from prefabricated blanks of packaging laminate, is generally provided with some form of opening device to facilitate access to the packaged milk product when it is time to empty the packaging container of its contents. . Such an opening device can be either a fully or only partially integrated part of the packaging container. In a very simple, but efficient and optional embodiment, an opening device of the first-mentioned type can be a tear perforation arranged in the container cradle along which a part of the container cradle delimited by the tear perforation is intended to be torn up and deposited to expose an empty hall through which the packaged product can be held. when the packaging container is to be emptied of its contents.
    The kanda packaging container has many advantageous and appreciated properties. It is easy to stack and arrange in efficient transport and handling groups and it gives the packaged product an excellent mechanical saliva as physical protection during the entire transport and handling of the packaging container from filling and sealing to emptying and consumption. The packaging container is also sufficiently mechanically stable to be easily gripped and held by hand when it is time to open and empty it of its contents.
    However, a serious disadvantage associated with the known packaging container is that it almost always leaves a not entirely negligible amount of the fermented milk product attached to the inner cradles of the packaging container after emptying. For film lime, for example, it is not uncommon for such a residual product quantity to amount to about 10% of the packaging container's original product quantity, while the corresponding residual product quantity for crame fraiche can amount to as much as 20% of the original product quantity.
    The spirit of the invention An object of the invention is thus to eliminate, or in the usual case greatly reduce, the problem described above in connection with the prior art.
    Another object is to provide a packaging laminate of the known type for a packaging container which enables a practically complete emptying of its contents, even when it is a liquid-shaped fermented milk product.
    A further object is to provide a filled packaging container of the type initially described which, unlike the known packaging container, allows a practically complete dispensing of and emptying of its contents, even when it is a liquid-shaped fermented milk product.
    Additional features and advantages of the invention will become apparent from the following description.
    DESCRIPTION OF THE INVENTION In one aspect, the invention thus provides a packaging laminate comprising a layer of paper and outer liquid-tight layers on both sides of the paper layer. The packaging laminate can be characterized in that one of the two outer liquid-tight layers has a coating of whey protein on its free surface.
    The term "whey protein" according to the invention refers to the non-fat-soluble proportion of naturally occurring protein in ordinary cow's milk. According to J. of Dairy Research, 79 (01): 5359, 2012, common cognac has the following natural composition: 87.3% water; 4.6% lactose; 3.9% light; 3.25% protein; 0.65% mineral names; 0.18% organic acids; and 0.14% otherwise.
    Of the total protein content in cow's milk, the non-fat-soluble proportion (ie whey protein) is about 20%, while the remaining about 80% in all essentials is fat-soluble casein. In the compilation above, the cognac's content of non-fat-soluble protein (ie whey) is thus 20 / 100x3.25% = 0.65% while the cognac's content of fat-soluble protein (ie casein) p5 is correspondingly 80 / 100x3.25% = 2, 60%.
    Whey protein for the spirit of the invention can be obtained as a by-product of traditional cheese making where the fat soluble portion (ie casein) of the protein content of the starting milk (in this case the cognac) is separated from the non-fat soluble portion (ie whey protein) and used for further cheese making. the non-fat soluble portion (whey protein) is recovered and used for the spirit of the invention.
    Coating of whey protein on the surface of one of the two outer liquid-tight polyethylene layers of the packaging laminate of the invention is preferably made from a dried powdered whey protein. The dried powdered whey protein is dissolved in water and the resulting aqueous solution is applied to the desired extent and to the desired places on the free surface of the water-tight outer layer by coating or printing. The water solution thus applied is then dried by expelling and evaporating water while supplying heat energy.
    In order to reduce the amount of water to be deposited and thereby reduce the energy consumption in this drying, as large an amount of powdered whey protein as possible is preferably used in the aqueous solution. In other words, the amount of powdered whey protein used must correspond to the mating amount of the aqueous solution to ensure that the least possible amount of water needs to be removed by drying while applying the largest possible amount of whey protein to the surface of the polyethylene layer.
    The starting material of the dried powdered whey protein has a composition which may vary from cheese making to cheese making and also from season to season, but generally has the following composition [C W Hall and T I Hendrick. Drying Milk and Milk products. The AVI Publishing Comp Inc. 1966, Westport, Connecticut]: 65-88% lactose; 1-17% whey protein; 0.7-10% minerals; 0.5-12% fat; 0.1-12% lactic acid; 2-15% water The term "film milk" according to the invention refers to a number of commercial milk products, all of which are produced by fermentation with respective bacterial cultures. Typical bacterial cultures for the production of film yolk include strains of Streptococcus, Lactococcus (which is a subdivision of Streptococcus) and Leuconostoc.
    The term "yogurt" refers to a group of liquid fermented milk products which are produced by fermentation with a bacterial culture containing two strains of lactic acid bacteria, i.e. Lactobacillus delbrueckii subsp. bulgaricus and Streptococcus salvarius subsp. thermophilus. In the trade, yoghurt is found both as a natural and flavored milk product.
    The term "crème fraiche" refers to a liquid milk product which is produced by fermentation of graded lactobacillus belonging to a bacterial culture belonging to the genus Lactobacillus.
    The invention is based on an equally unambiguous and surprising observation in connection with a simple experiment with a substantially flat sheet whose sides are coated with whey protein. The s5 coated sheet was immersed in a shell filled with a liquid fermented milk product, in this experiment film milk, and kept completely immersed for several days. After this relatively long residence in the fermented milk product, the sheet was picked up and raised with its flat flat side surfaces in a vertical position just above the shells to drain as much as possible of the accompanying milk product from the sheet. At the same time, the experiment was repeated with a corresponding polyethylene coated sheet without any coating of whey protein. Also this as a reference serving sheet is kept immersed in the filled shell during the same period of time as the previous sheet before it was picked up and allowed to drain under the same conditions as this. The result was unambiguous and showed with all unequivocal clarity that the sheet which had both sides coated with whey protein was practically completely free of residual milk product, while the reference sheet which lacked corresponding coatings was more or less entirely free of residual product which had not been released. the polyethylene surfaces of the sheet.
    Without being bound by any scientifically correct theory, this observation can be explained and clarified with the help of a simple working hypothesis which assumes that there is an energy-related competitive situation between present fat and protein molecules in the fermented product. The [Dada 'molecular species each have a tendency to migrate towards and interact with the available binding sets on a polyethylene surface in contact with the fermented product. Due to the different molecular sizes of their inboard, they migrate differently in the fermented product and therefore reach these sets at different times. The molecules that migrate fastest are the hydrophobic smaller fat molecules that first reach and interact with available hydrophilic acids on the surface. In this way, simultaneously available hydrophobic salts on the surface will be sterically blocked. Gradually, even the larger slower amphiphilic protein molecules emerge and, due to their amphiphilic nature, will interact with both hydrophobic and hydrophilic seeds on the surface and to the already bound fat molecules. As a result, the previously blocking smaller fat molecules will be gradually pushed aside and at the same time release the corresponding set of successively additional protein molecules.
    By already from the beginning, ie. prior to contact with the liquid fermented milk product, coating the free surface of one of the outer liquid-tight layers of the packaging laminate of the invention with a coating of whey protein will thus block all binding batches on this surface and become inaccessible to such competing fat and protein receptors. . In other words, a fermented milk product in contact with such a coated surface can no longer stick and remain on it. The amount of whey protein used in the packaging laminate according to the invention may vary depending on the type of fermented milk product for which it is intended, but in general the amount is less than 5 g / m 2. In practice Or the amount between 1 and 3 g / m2, such as for example 2 g / m2.
    Since a coating of whey protein cannot be sealed or only insufficiently sealed by heat sealing.
    The outer laminate layer of the packaging laminate can, but does not have to, consist of the same material. Examples of suitable materials for both layers may be polyolefins, such as polyethylene and polypropylene, preferably polyethylene. The term "polyethylene" according to the invention refers to a polyethylene selected from the group consisting of low density polyethylene (LDPE), linear low density polyethylene (LLDPE) and high density polyethylene (HDPE). For clarification purposes, it should be added that a polyethylene of the low density polyethylene (LDPE) type and linear density polyethylene (LLDPE) type have a density of 0.910 - 0.945 g / cm 3, while a high density polyethylene (HDPE) type polyene has a density exceeding 0.945 g / cm 3.
    In a practical embodiment, the packaging laminate is provided as a substantially rectangular, planar tubular blank whose one pair of opposite edges are connected to each other in a water-tight sealing joint with the proteinaceous surface of the packaging laminate freely exposed on the inside of the tubular blank.
    In another practical embodiment, the packaging laminate is provided as a rolled web of cohesive packaging blanks.
    In another aspect, the invention provides a sealed packaging container containing a liquid fermented milk product, which packaging container is made of post-packaging laminate comprising a rigid but foldable layer of paper and outer liquid-tight layer of polyethylene on both sides of the paper layer. The packaging container can be characterized in that it has a surface coating of whey protein in contact with the liquid-shaped fermented milk product on the inside of the packaging container.
    In a practical embodiment, the packaging container is made from a substantially rectangular plan weight tubular blank of the packaging laminate according to the invention, which blank has one pair of opposite edges connected to each other in a water-lacquered 7 overlap joint with the protein-coated surface of the packaging laminate. The planar-folded tubular blank is first raised to an open rudder-shaped container capsule, one of which is closed by folding and heat-sealing foldable duct panels at the spirit of the container capsule to form a substantially flat bottom closure.
    The bottom-provided container capsule is filled with a liquid-shaped fermented milk product through the open arid of the container capsule, which is then closed by folding and heat sealing the corresponding foldably continuous duck panels at the container capsule to form an openable top closure.
    In another practical embodiment, the packaging container is made from a web of the packaging laminate according to the invention. The web is transformed into a tube by joining the two longitudinal edges of the web together in a longitudinal water-tight sealing joint with the protein-coated surface of the packaging laminate water in the tube. The tube is filled with a liquid fermented milk product and divided into continuous cushion-shaped packaging units by repeated transverse presses and heat seals of the tube across the longitudinal direction of the tube below the product level of the tube. The filled cushion-shaped packaging units are separated from each other by cuts in the transverse sealing areas and are given the desired geometric shape, preferably parallelepipedic, by at least one further folding.
    Brief Description of the Figures Advantageous practical embodiments of the invention will be described in more detail in the following with reference to the accompanying drawings, in which: Figure 1 is a schematic cross-section of a packaging laminate according to the invention; Figure 2 schematically shows a substantially rectangular blank of the packaging laminate in Figure 1; Figure 3 is a schematic view of the upper part of a packaging container of a walrus type produced by folding and heat sealing the blank of Figure 2; Figure 4 schematically shows a web of foldably continuous blanks of the packaging laminate in Figure 1; and Figure 5 is a schematic view of the upper part of a packaging container of another walrus type produced by folding and heat sealing the web-shaped blank of Figure 4. Detailed description of the figures Figure 1 thus schematically shows a cross section of a packaging laminate according to the invention. The packaging laminate of the general designation 10 has a mechanically rigid but foldable layer 11 of paper and outer liquid-tight layers 12 and 13 of polyethylene (PE) on the sides of the paper layer 11. The packaging laminate 10 further has a coating 14 of whey protein on the freely exposed surface of one 13 of the two outer layers. As will be described in more detail below, the coating 14 on the packaging laminate 10 according to the invention will be applied to the surface of the outer layer 13 which is intended to be watered in a packaging container made by the packaging laminate 10 for a liquid fermented milk product.
    The two outer liquid-tight layers 12 and 13 may consist of a low density polyethylene (LDPE) having a density of 0.910 - 0.945 g / cm 3, a lin. * Low density polyethylene (LLDPE) having a density of 0.910 - 0.945 g / cm 3 or a high density polyethylene (HDPE ) with a density exceeding 0.945 g / cm3.
    The coating 14 of whey protein on the outer polyethylene layer 13 can be applied by coating (dispersion coating), but is preferably applied by printing technology, such as flexographic printing, gravure printing, etc. Printing technology has the advantage that it easily allows coating within only selected, but optional areas of the surface of the outer layer 13. Such a selective surface coating is necessary if the packaging laminate 10 is intended to be transformed into a packaging container by folding and heat sealing, as will be described in more detail below.
    The amount of whey protein in the coating 14 at the packaging laminate 10 can amount to 5 g / m2, but is generally between 1 and 3 g / m2, as well as 2 g / m2.
    A packaging laminate 10 according to the invention is provided, for example, as a substantially rectangular sheet-shaped packaging blank, as shown schematically in Figure 2, or as a web of continuous packaging blanks, a part of which is shown schematically in Figure 4.
    The substantially rectangular sheet-shaped packaging blank, which has the general designation 20 in Figure 2, is divided by a sample of fold lines in side wall folds 21 and 22, top closure folds 23 and 24 and bottom sealing folds 25 and 26.
    The top closure folds 24 and the bottom sealing folds 25 are triangular and arranged to fold in a bellows-like manner between the top closure folds 23 and the bottom sealing folds 26. Upon such folding of the triangular folds 24 and 25, the connecting triangular folds 24 'are folded back so that they will lie between the folds. 23 and 24 and folds 26 and 25, respectively. This top and bottom construction are common on several so-called gable-top packaging. Figure 3 shows the upper part 30 of a typical such gable-top package.
    Before transport from the production line to the filling machine line and transformation into finished filled packaging containers (the typical upper part 30 of which is shown schematically in Figure 3), the opposite edges 27 and 28 of the packaging blank 20 are joined and heat-sealed in a water-lacquered overlapping joint to form a package. With the packaging blank 20 according to the invention, this joining, heat sealing and plane folding of the packaging blank 20 takes place in such a way that the outer protein-coated layer 13 of the packaging laminate 10 is used in the plane-folded tubular packaging blank 10.
    For transformation into filled closed packaging containers of the type whose upper part 30 is shown schematically in Figure 3, the plan-folded tubular packaging blank is first erected into an open tubular container capsule which may, but does not necessarily need, have a square cross-section. The raised container capsule is then closed at its one open end by folding and heat sealing the foldably continuous bottom sealing folds 25 and 26 of the packaging blank to form a substantially flat bottom closure. The bottomed container capsule is filled with the product in question, in this case a liquid fermented milk product, through its open spirit. After this filling, the open end of the tubular container capsule is closed by folding and heat sealing the corresponding foldably connected top sealing folds 23 and 24, as described above, at the spirit of the container capsule to give the finished packaging container a top closure 30 of the type shown in Figure 3.
    As previously mentioned, the packaging laminate according to the invention can also be provided in the form of a web of foldably continuous packaging blanks. Figure 4 schematically shows a part of such a web comprising an entire packaging blank 40 between two corresponding packaging blanks of which only parts are shown. The packaging blank 40, like the packaging blank 20 shown in Figure 2, is divided by a sample of fold lines in side cradle folds 41 and 42 as well as top closure folds 43 and 44 and bottom closure folds 45 and 46.
    From the web in Figure 4, filled sealed packaging containers of the kanda type shown in Figure 5 are produced with a substantially parallelepipedic geometric shape. The web is first transformed into a tube by joining the longitudinal edge zones 47 and 48 of the web and joining them together in a longitudinally watered overlapping joint. According to the invention, this tube forming is to take place in such a way that the protein-coated outer layer 13 of the packaging laminate is used in the shaped tube. The tube is filled with the actual product, in this case a liquid fermented milk product, and is divided into individual filled packaging units by repeated transverse compressions and heat seals of the tube across the longitudinal direction of the tube below the product level of the tube. The packaging units are separated from each other and given the desired geometric shape, usually parallelepipedic, by at least a further folding and heat sealing to obtain finished packages of the optional type whose upper part is shown schematically in Figure 5.
    For the sake of clarity, the same reference numerals have been used for corresponding parts in Figure 5 as in Figure 4. The parallelepiped packaging container thus comprises a substantially flat top closure 43 and four oppositely opposite vertical side cradles 41, 41 and 42,42 and has a substantially rectangular cross-section.
    Although the invention has been described with particular reference to packages of the type shown in the accompanying drawings, it is not limited to such dimensionally stable packages alone. The invention can equally well be applied to other types of packaging, such as, for example, flexible passes, which differ in all essentials from the previous ones by selecting paper layers in the packaging laminate. While the dimensionally stable packages are made of a packaging laminate having a rigid but foldable layer of paper, the latter package-like packages may be made of a corresponding packaging laminate in which the paper layer is thin and flexible. These types of packages are within the scope of this invention. the appended claims.
    Industrial usability The packaging laminate according to the invention is intended for the production of packaging containers for a liquid-shaped fermented milk product, such as, for example, film, yoghurt and crème fraiche. The packaging laminate is especially intended for such openable packaging containers which are to be emptied of their contents by pouring out of the opened packaging. 11
    权利要求:
    Claims (10)
    [1]
    A packaging laminate for a packaging container for a liquid fermented milk product, which packaging laminate (10) has a layer (11) of paper and outer liquid-tight layers (12, 13) on both sides of the paper layer (11), characterized in that one (13 ) of the! Dada outer liquid-tight layers have a coating (14) of protein p5 its free surface.
    [2]
    Packaging laminate according to Claim 1, characterized in that the coating (14) consists of whey protein.
    [3]
    Packaging laminate according to claim 2, characterized in that the coating (14) is omitted from such areas of the outer liquid-tight layer (13) which are intended to be sealed by heat sealing when the packaging laminate is transformed into a packaging container.
    [4]
    Packaging laminate according to one of Claims 1 to 3, characterized in that the material in the outer liquid-tight layers (12, 13) is a polyolefin.
    [5]
    Packaging laminate according to Claim 4, characterized in that the material in the outer liquid-tight layers (12, 13) is polyethylene.
    [6]
    Packaging laminate according to one of Claims 1 to 5, characterized in that the layer (11) is a rigid but foldable paper layer.
    [7]
    Packaging laminate according to any one of claims 2-6, characterized in that the coating (14) of whey is applied in an amount of between 0 and 5 g / m2.
    [8]
    Packaging laminate according to Claim 7, characterized in that the coating (14) of whey is applied in an amount of 2 g / m2.
    [9]
    A sheet or web-shaped blank (20; 40) of a packaging laminate according to any one of claims 6-8, characterized in that it has a pattern of fold-undergoing weakening lines along which the blank (20; 40) is intended to be folded when it is transformed into a packaging container (30; 50).
    [10]
    Packaging container for a liquid fermented milk product, which is produced by folding and heat sealing a sheet or web-shaped blank (20; 40) according to claim 9, wherein the coated outer layer (13) of the packaging laminate is used in the packaging container (30; 50) . D
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    BR112013029964A2|2011-05-31|2017-01-31|Tetra Laval Holdings & Finance|packaging forming material, packaging container, and method for making a continuous sheet of packaging forming material|
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    法律状态:
    2020-03-03| NUG| Patent has lapsed|
    优先权:
    申请号 | 申请日 | 专利标题
    SE1350883A|SE538081C2|2013-07-16|2013-07-16|Packaging laminate and packaging container for a liquid fermented milk product|SE1350883A| SE538081C2|2013-07-16|2013-07-16|Packaging laminate and packaging container for a liquid fermented milk product|
    PCT/EP2014/063660| WO2015007498A1|2013-07-16|2014-06-27|Packaging laminate and packaging container for a fermented liquid milk product|
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    MX2016000363A| MX2016000363A|2013-07-16|2014-06-27|Packaging laminate and packaging container for a fermented liquid milk product.|
    CN201480040843.2A| CN105377554A|2013-07-16|2014-06-27|Packaging laminate and packaging container for fermented liquid milk product|
    RU2016104891A| RU2016104891A3|2013-07-16|2014-06-27|
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