• 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:
    A method for the design of a packing laminate (5) and a packing laminate (5) manufactured according to this method. Packing containers are often made from a laminated material including a relatively thick carrier layer on both sides of which thinner, liquid-tight plastic layers are applied. During its conversion into a packing container the laminate (5) is folded and especially when one or more layers (3, 4, 5) are to be folded at the same time there is a great risk that cracks occur in the layer situated on the outside of the carrier layer in the fold, which layer is severely stretched during the folding. According to this invention it is suggested to diminish the stretching of the outer layer (3) by cutting through the carrier layer where the fold is to be made, so that the carrier layer can be compressed during the folding. This makes the distance around the fold shorter for the outer layer (3) so that the stretching is diminished and kept inside the strechability of the material, which means that cracks can be avoided.
    公开号:SU1037833A3
    申请号:SU782640397
    申请日:1978-07-11
    公开日:1983-08-23
    发明作者:Аксель ЯН；Раусер Ингемар；Четрелли Ренато
    申请人:Тетра Пак Интернэшнл Аб (Инопредприятие)；
    IPC主号:
    专利说明:

    /
    WITH
    00
    oo
    00 The invention relates to the manufacture of packaging container blanks. Disposable packaging containers are made from a coiled or sheet material, which is folded and compacted into a container of a given shape by folding and sealing. For this purpose, a layered material can be used, which contains layers of various materials that impart predetermined properties to the laminated material: strength, stiffness and impermeability to liquids. Often used packaging laminates contain centrally located carrier layers of fibrous material, which are coated on any side with uniform plastics layers. The plastic layers are made of a thermoplastic material which allows the material to be easily compacted by heating and pressing, instead of the plastic layers, of the two parts that are to be joined together. Usually, in order to reduce light transmission by laminated packaging material, other layers are introduced, for example, an aluminum foil layer, located between the carrier layer and one of the thermoplastic layers, which in the finished packaging container very effectively protect the packaging contents from light. The known preform for packaging made of laminated material, containing the base layer, uniform plastic layers, covering the base layer, with intersecting fold lines T -. A known method of manufacturing a blank for packaging, including the application of outer plastic layers on the carrier layer and double bending of the laminate along two intersecting bending lines 1. When forming a packaging blank, the laminate is subjected to considerable stresses. This is particularly the case when the material is folded, because folding of the material due to the relatively high rigidity of the base layer means that one of the thermoplastic layers is strongly stretched and the other is compressed. all along the fold line. However, due to the high extensibility of thermoplastic tin, this very rarely leads to damage to the thermoplastic material and loss of impermeability to liquids. If the packaging material also contains aluminum foil, it may crack when the laminate is folded. With a one-time folding of about 180 blanks from a packaged laminate, considerable difficulties arise when two such folding lines intersect each other. This occurs along seals, which are typically made on packaging containers. The seals are usually made in such a way that the thermoplastic layer facing the inner side of the packaging container heats up along the edges of the edges of the packaging laminate that are to be joined together, whereby the zones of two layers heated to softening are joined and pressed to each other. In this way, a sealing lip is formed, which is located on the outside of the packaging container and contains two layers of laminate. Since the sealing lip must not obstruct, it bends down towards the outside of the packaging container. Consequently, one layer of the laminate is folded 180 and the wall of the packaging container in the sealing zone consists of three layers of laminate, i.e. has a thickness of three skles. This type of seal extends along one or more side faces of the packaging container. When folded about 180 transversely to the compaction zone, the layer of material which, after being folded, is located on the outside of the fold, is subjected to strong stretching, stress, with corresponding stretching and cracking. These tensile stresses are so strong that not only the aluminum layer included in the laminate but also the thermoplastic layer cracks and the contents leak. The aim of the invention is to improve the quality of the packaging blank. The goal is to achieve a tag # that in a blank for packaging made of laminated material containing a carrier layer, uniform plastic layers covering the carrier layer, with intersecting fold lines, at the intersections of the fold lines the carrier layer contains perforations. According to the packaging manufacturing method, comprising applying outer plastic layers on the carrier layer and double bending the laminate along two intersecting bending lines, before applying the layers, the carrier layer and one of the outer layers of the blank are in the intersection zone of the bend lines. In this case, an annular incision is made in the supporting layer around the zone of intersection of & no fold lines and the cut part is removed.
    The cut is made along two intersecting lines, the intersection point of which coincides with the intersection point of the bending lines of the workpiece.
    Fig. 1 shows a portion of a packaging blank with a sealing lip, which folds down toward the outside of the laminate packaging container; in Fig. 2, a portion of the packaging blank of Fig. 1, folded approximately 180 ° along a folding line located perpendicular to the longitudinal axis of the sealing lip; in FIG. 3, the sealing and folding zone of FIG. 2 and the method for removing a portion of the material; figure 4 is a sealing protrusion of figure 2 in an enlarged scale section in the DIRECTION direction, figure 5 - 5 sealing lip in figure 3 in an enlarged scale, a section in the longitudinal direction; nd fig.b - sealing ledge, a section in the longitudinal direction, with a part of the material removed.
    The laminate blank comprises a relatively thick central carrier layer, for example paper, which gives the material the necessary rigidity. To prevent moisture from being absorbed by the fibrous carrier layer from the environment and from the packaged contents, the carrier block is coated on both sides with thin layers of a uniform plastic layer, which is preferably thermoplastic. Depending on the type of content packed in a container made of laminated packaging material, the packaging laminate may also contain other layers for various purposes, for example, an aluminum layer that is impermeable to light, which prevents exposure to daylight on the contents. The various layers of the laminate in the drawing are shown as one layer.
    Figure 1 shows a portion of the wall 1 of the packaging container with a seal. This seal is made in such a way that the thermoplastic material layers facing the inner side of the packaging container are heated along the edges of the edges that need to be joined, after which the layers are pressed against each other so that a seal is formed to form a sealing lip 2 located outside the package. Consequently, a triple-thickness wall is formed in the sealing zone of the packaging container, and the packaging container contains an inner layer 3 that forms the wall of the packaging material in the sealing zone along with layers 4 and 5 forming the sealing lip 2. The material layer 4 forms part of the layer 3 material folded around on
    180
    and material layer 5 forms
    continuation of the outer layer of the parts of the two walls, sealed together in a sealing ledge.
    Such a seal is typical and is used in most disposable packaging containers, for example for liquid dairy products. The sides of the container, on the KOTopbJX, are located the sealing lugs, fold about 180 ° along the folding line, which is positioned at a right angle to the sealing lip:
    Fig. 1 shows a point 6 at which two lines of folding of the workpiece intersect. At this point, folding of the sealing protrusion 2, consisting of three layers of laminated material, occurs about 180 °, which gives a sixfold increase in the thickness of the material, as shown in Fig. 4, in longitudinal section through the sealing protrusion 2 after the folding, shown in figure 2. When folding about 180 times this three times folded material, the plane is neutral, i.e. a plane in which there is no tensile or compressive stress is located essentially between the inner layers 4 and 5 of the material; The material layer 5, located inside the neutral-plane, is compressed at the site of folding and squeezing, and the other two layers 3 and 4, located outside the neutral plane, are subjected to tensile stresses, significantly higher in the material layer 3, which KOTOEM is furthest from. These tensile stresses lead to the formation of cracks in the base layer of the material layer 4 located inside. Due to the large tensile stresses in the layer 3 of the material located outside, cracks also often form in the layer of the thermoplastic material of this laminate, which deteriorates the tightness of the container. In the presence of a layer of aluminum, foil, double folding of the laminate leads to the formation of cracks of aluminum foil, which takes place in two outer layers x 3 and 4.
    All earlier attempts to eliminate the formation of cracks were aimed at increasing the ability of the material to withstand 5 stresses. According to the invention, the tensile stresses are reduced in the outer layers due to their approach to the neutral plane, where the stresses are less. The carrier layers of the layers 3 and 4 of the material are cut and removed in the zone where the two folds intersect with each other. The location of the cut out part of the material is shown & but on. 3, In zone 7, two layers 3 and 4 of the material do not have a carrier layer. As follows from FIG. The thermoplastic layer in the two layers 3 and 4, after removing the carrier layer in these layers, is practically not at all exposed to tensile stresses, as a result of which the packed material is impermeable and does not transmit light. Zone 1, in which the carrier layer of the material is removed / is located directly at the intersection point between the two folds, whereby the attenuation caused in the material is not significant. In another embodiment of the proposed method, the tensile stresses on the outer layers of the material are reduced, and the carrier layer is cut from zone 7 (Fig. 3) in layer 5, KOTO4LY is located inside the neutral plane Dfg.5). Due to this, the layer 5, which consists only of thermoplastic layers and possibly aluminum foil, is compressed more easily, and the outer layers 3 and 4 may follow a line that more or less coincides with the neutral plane. The removal of one or several carrier layers from the layer of laminated material in this zone occurs only during the manufacture of laminated material, i.e. before equipping the carrier layer with two thermoplastic layers and, if necessary, with any aluminum layers. The carrier layer is preferably removed by punching out excess material, so that a hole is obtained which can be easily and accurately installed in the correct position, since the intersection lines along which the material must fold when the packaging container is formed, clearly indicate the place in in which the folding lines will intersect with each other in the finished packaging container. This embodiment of the method of manufacturing blanks, in which part of the base layer is removed, effectively prevents the formation of cracks in others. However, it has the disadvantage that the part of the material being punched forms waste, which must be removed and processed, which can cause difficulties at very high production rates of the workpiece. In order to eliminate material waste, another embodiment of the invention is proposed, in which instead of cutting and removing a part of the base layer, the base layer is provided with cuts in the form of two or more intersecting lines, wherein the intersection point coincides with the intersection point of two or more intersecting folding lines. This variant of the method gives the carrier layer greater flexibility at the point of folding, Reduces the stresses in the thermoplastic and aluminum layers and can be used when the laminate is relatively thin and the stresses are not too large. The cutting of the carrier layer according to this embodiment is carried out accordingly before it is joined to the thermoplastic layer or the aluminum foil layer. According to the inventions, the laminate comprises a carrier layer along with homogeneous plastic layers covering the carrier layer, and possibly with other layers, for example with aluminum foil. The laminate blank may have an arbitrary known shape, but is provided with perforated portions on the base layer in those places where the laminated material contains converging or intersecting folding lines. . The proposed method is productive, simple, inexpensive and economical. In this case, a material of lower quality can be used, subject to much lower stresses that arise in the remaining part of the surface of the packaging container.
    权利要求:
    Claims (4)
    [1]
    PREPARATION FOR PACKAGING FROM LAYERED MATERIAL AND METHOD FOR PRODUCING PREPARATIONS FOR PACKING. , (571 1. A blank for packaging of | layered material, containing • a bearing layer, uniform plastic layers covering the bearing layer, with intersecting bend lines, which is available in order to improve quality, in months * of the intersection of the bend lines the carrier layer contains perforations. '
    [2]
    2. A method of manufacturing a blank for packaging, comprising applying the outer plastic layers to the carrier layer and double folding the laminate along two intersecting bend lines, characterized in that before applying the layers, the carrier layer and one of the outer layers of the preform are perforated in the zone of intersection of the bend lines.
    [3]
    3. The method according to claim 2, with the fact that in the carrier layer an annular cut is made around the zone of intersection of the fold lines and the cut out part is removed. s
    [4]
    4. The method according to claim 3,. This is due to the fact that the cut is made along two intersecting lines, the intersection point X e of which coincides with the ** 'and · intersection of the bend lines of the workpiece. Λ
    类似技术:
    公开号 | 公开日 | 专利标题
    SU1037833A3|1983-08-23|Package blank of laminated material and method for making blanks for packaging
    US4287247A|1981-09-01|Packing laminate provided with crease lines
    US4559259A|1985-12-17|Packing laminate provided with crease lines
    CA1109438A|1981-09-22|Packing container and a laminate for its manufacture
    SU1745115A3|1992-06-30|Method of manufacturing blanks for package containers with liquid discharging opening
    US4711797A|1987-12-08|Material for packing containers
    EP0083441B1|1986-02-26|Packing container
    EP2445821B1|2019-02-13|Strip splicing
    US4080235A|1978-03-21|Method for providing a laminate web with a firm edge strip
    RU2175939C2|2001-11-20|Blank for package made of laminated material including moisture-sensitive gastight layer, method of manufacture of blank | and packing container made from blank
    US4572426A|1986-02-25|Paperboard container with internal raw edge protection and method for constructing same
    CS302291A3|1992-04-15|Method for creating deflection curve on a packaging material
    EP1226024B1|2006-08-09|A method of producing a packaging container provided with an opening arrangement
    RU1836267C|1993-08-23|Laminated material for manufacturing of packing containers and method of producing the same
    JP3946259B2|2007-07-18|Web-shaped laminated packaging material, process for producing the same, and packaging container produced from laminated packaging material
    ES469509A1|1979-01-01|Package blanks
    CA1036919A|1978-08-22|Method for providing a laminate web with a firm edge strip
    RU2756338C2|2021-09-29|Method for manufacturing package with increased barrier properties
    EP0583575B1|1997-01-29|An opening arrangement for a packing container
    RU2695384C1|2019-07-23|Method of producing an elongated protective layer of a shaping material of a workpiece
    CA1132466A|1982-09-28|Folding boxes for liquids
    CA2082403A1|1992-09-07|Method for producing a sealed package, cut blank for the production of the package and produced package
    同族专利:
    公开号 | 公开日
    EP0000374A1|1979-01-24|
    IT7825455D0|1978-07-07|
    DE2860818D1|1981-10-15|
    EP0000374B1|1981-07-08|
    AU3790078A|1980-01-17|
    SE7708027L|1979-01-12|
    AU523844B2|1982-08-19|
    CA1119942A|1982-03-16|
    US4511078A|1985-04-16|
    IT1096930B|1985-08-26|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US1299824A|1919-04-08|American Can Co|Container-body.|
    US2291542A|1939-12-23|1942-07-28|Eagle Pencil Co|Box wrapper|
    GB559274A|1942-10-11|1944-02-11|Herbert Maclean Ware|Improvements in or relating to sealable bottles and like containers composed of paper, wood-pulp or other like material|
    US2634046A|1950-08-10|1953-04-07|Morris M Weber|Cardboard box structure|
    US3032251A|1959-01-08|1962-05-01|Hermorion Ltd|Laminate sheet material and package produced therefrom|
    NL257987A|1959-11-16|
    US3067923A|1960-11-15|1962-12-11|Minnesota Mining & Mfg|Carton|
    FR85710E|1964-02-14|1965-10-01|Anciens Etablissements Walton|Method of manufacturing moisture resistant corrugated cardboard packaging, in particular fruit or vegetable trays|SE432918B|1979-10-18|1984-04-30|Tetra Pak Int|BIG LINE PACKAGED LAMINATE|
    IE55389B1|1983-08-04|1990-08-29|Marshall Cavandish Services Li|Improvements in or relating to containers and methods of,and apparatus for,manufacturing containers|
    US4623072A|1985-04-18|1986-11-18|Macmillan Bloedel Limited|Corrugated container with foldable flaps|
    JPS6295520U|1985-12-06|1987-06-18|
    EP0640461A1|1988-08-01|1995-03-01|Tetra Laval Holdings & Finance SA|Method for producing a flexible creased packaging material|
    US5223194A|1988-08-01|1993-06-29|Tetra Alfa Holdings S.A.|Flexible packing material in sheet or web form|
    SE467403B|1990-11-07|1992-07-13|Tetra Alfa Holdings|PACKAGING MATERIALS WITH GOOD GAS BARRIER PROPERTIES AND MATERIALS MADE PACKAGING CONTAINER|
    US5944252A|1997-03-18|1999-08-31|Connelly Containers, Inc.|Corrugated board container and method of making the same|
    SE513254C2|1997-11-13|2000-08-07|Tetra Laval Holdings & Finance|Ways to manufacture edge-sealed packaging container blanks|
    DE69823325T2|1998-02-13|2005-05-04|Tetra Laval Holdings & Finance S.A.|Notched sheet material for packaging liquid foods and packages made therefrom|
    US6085970A|1998-11-30|2000-07-11|Insulair, Inc.|Insulated cup and method of manufacture|
    WO2005102847A1|2004-04-22|2005-11-03|Insulair, Inc.|Insulating cup wrapper and insulated container formed with wrapper|
    US7767049B2|2006-10-12|2010-08-03|Dixie Consumer Products Llc|Multi-layered container having interrupted corrugated insulating liner|
    JP2012524678A|2009-04-23|2012-10-18|ディーエスエムアイピーアセッツビー．ブイ．|Compression sheet|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    SE7708027A|SE7708027L|1977-07-11|1977-07-11|WAY TO DESIGN A PACKAGING LAMINATE AND ACCORDING TO A PACKAGED LAMINATED|
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