• 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:
    Opening arrangements on packing containers are often of the type which comprises a prefabricated pouring opening. The cut edges appearing around the pouring opening must be protected, e.g. for reasons of hygiene, from the liquid contents present in the packing container, and this is generally done by a liquid-tight strip applied to the inside. A simpler manner of achieving this protection consists in ensuring that the thermplastic layers (3, 4), which in general are present on both sides of packing laminate, extend past the cut edge (12) and are sealed in a liquid-tight manner to each other. This can be achieved simplest if the hole- punching of the carrier layer of the material is done prior to the application of the thermoplastic layers.
    公开号:SU1745115A3
    申请号:SU853871051
    申请日:1985-03-20
    公开日:1992-06-30
    发明作者:Карлссон Ларс
    申请人:Аб Тетра Пак (Фирма)；
    IPC主号:
    专利说明:

    The invention relates to packaging, in particular to the manufacture of packaging containers of this type, which are used for liquid contents and are made in whole or in part from a packaging laminate structure comprising layers of fibrous carrier material and thermoplastic.
    The purpose of the invention is to improve the hygiene of the containers by creating a pouring aperture that is suitable and in which the edge of the pouring aperture is protected in such a way that a high liquid and gas tightness is obtained without the need to use any inner covering layer
    Figure 1 shows a variant of the container blank with a pouring hole and a closed position, a cross section; figure 2 - the second version of the container blank with a filling hole in the closed position, the cross-section in figure 3-5
    - three successive stages of the method for producing a pouring aperture.
    The first variant of the method for producing blank packaging containers for a liquid with a filling opening (Fig. 1) is intended for packaging containers which are made of a flexible packaging laminate in the form of a strip or sheet. This type of packaging container basically has a parallelepiped shape to a greater or lesser extent, and the opening is properly positioned on the upper surface of the packaging container in the vicinity of one of the edge lines that define the boundaries of the upper surface relative to the adjacent walls of the packaging container
    The packaging laminate 1 comprises a carrier layer 2 of fibrous material, for example paper. On both sides of the underlying layer are neproni (L
    WITH
    g
    iOl

    W
    liquid layers 3 and 4 of thermoplastic material, for example, polyethylene, When a packaging laminate is used to make aseptic packages, for example, packaging containers that are intended for packaging sterile products, a gas barrier is added in the form of a layer 5 of metal (aluminum) ) foil or some other suitable material with good gas barrier properties. Moreover, this layer is connected to the inner thermoplastic layer 4 of the packaging material. On the inner side of the layer 5 that creates a gas barrier, i.e. towards the inner side of the packaging container, there is an additional layer 6 of thermoplastic material which is impermeable to liquid and prevents any contact between content and creating an obstacle for gas layer 5.
    According to the invention, the packaging laminate 1 comprises a pouring aperture 7, cut in a proper place, which passes through all layers of the material 1 of the packaging laminate structure. On the tundish 7 there is a covering strip 8 placed outside the packaging laminate structure that contains a blocking layer 9, for example aluminum foil, and a layer 10 of thermoplastic, such as polyethylene, deposited on it. Thermoplastic layer 10 covering the strip 8 and the outer thermoplastic layer 3 of the packaging laminate structure are connected to each other by means of heat to provide a liquid-tight seal extending around the pouring opening 7. Thus, the casting The aperture 7 is closed in a liquid tight manner. At the same time, the seal between the covering strip and the packaging laminate can be quite easily destroyed when the packaging container is supposed to open and pour the contents through the opening 7.
    In order to improve the gas tightness and liquid impermeability of the packaging container in the opening area, the thermoplastic layers 3, 4 and 6 of the packaging layer structure are connected to each other in order to ensure tightness in the seal 11 passing around the pouring hole, ensuring that the thermoplastic layers completely cover and seal the edge 12 of the carrier layer 2 facing the pouring hole. This is significant because otherwise the contents could penetrate into the fibrous support layer 2 through the cutting edge 12, which could have a certain effect on
    packaging layered structure in terms of strength and hygiene. In order to prevent any gas exchange between the contents and the surrounding atmosphere, creating an obstacle to gas
    0, the layer 5 is folded together with the installation of a seal around the cutting edge 12 in the direction of the covering strip 8 and is completely enclosed in thermoplastic layers 3, 4, b, hermetically connected
    5 to each other.
    Thus, the barrier layer 5 is optimally shaped so that, in an efficient way, together with the barrier layer 9 contained in the covering strip 8, to prevent any penetration of gas into the orifice zone. At the same time, in the area of the pouring aperture 7, the gas-resistant layer 5 is generally covered by thermoplastic, which is substantially
    5 to prevent any contact between the gas interfering layer and the contents, which is especially unacceptable in the case where the gas interfering layer consists of metal foil.
    0 The second variant of the blank (Fig. 2) is in fact consistent with what is shown in Fig. 1. Therefore, the corresponding parts are indicated by the corresponding positions. The second variant of the blank contains an additional sealing layer 13, which is made in the form of a separate liquid-tight thermoplastic strip, tightly connected to the inner thermoplastic layer.
    0 6 packaging laminated structure and which also preferably consists of polyethylene, Sealing layer 13 covers the side of the casting hole
    7 facing the inside of the packaging container and provides liquid impermeability, since it is connected to the internal thermoplastic layer 6 of the packaging laminated structure with sealing
    0 by heat in the zone passing around the pouring aperture 7.
    In addition, the sealing layer 13 with the provision of sealing by means of heat is connected to the inner thermal 5 plastic layer 10 of the covering strip
    8, This means that part of the sealing layer 13, hermetically connected to the covering strip, is removed together with the covering strip 8 when the packaging ontainer is to be opened. In order to ensure that the desired part of the sealing layer is removed together, a weakening line may extend around the central part of the sealing layer 13, tightly connected to the covering strip 8.
    What has been said with regard to liquid and gas impermeability in the first embodiment is also valid for the second option, except that here safety with respect to liquid leakage is further enhanced by the sealing layer 13. If additional safety is also required with regard to liquid leakage and gas sealing layer 13 can be made with additional gas interfering layers.
    However, this second embodiment is more difficult to manufacture and will be justified only in exceptional cases, since the first embodiment already provides excellent liquid and gas impermeability, satisfactory in all normal types of aseptic packages, for example, for milk, juice or other food products, which are sterilized or otherwise processed to improve the preservation of their properties.
    The method for producing preforms of packaging containers with a pouring opening according to the invention is carried out in conjunction with the manufacture of packaging laminate, which is later converted into a packaging container of the desired shape. This type of packaging laminate comprises a carrier layer of fibrous material that is fed to a press for making laminate structures in the form of a successive paper web. The carrier layer prior to the deposition of layers of thermoplastic material is made with holes, which are applied by punching in order to form casting holes in the finished container. The holes are distributed in a known manner according to such a scheme that they obtain the desired location on the finished packaging container.
    After the carrier layer is made with holes having a predetermined shape and size, it is covered with layers 3 and 4 of a thermoplastic material. These layers are applied to both sides of the carrier layer 2 by extruding the heated thermoplastic material through a mouthpiece running transversely to the web on which the carrier layer and the thermoplastic layer just applied are passed between two cooling rollers pressed against each other, so that the thermoplastics partially penetrate in the carrier layer and securely connected to it. In cases where a gas barrier layer 5, such as aluminum foil, is desired, it is applied as a web and applied to one thermoplastic layer, on which an additional thermoplastic layer 6 is applied, so that the aluminum foil is completely covered.
    In the zone where the hole is cut, two thermoplastic layers 3 and 4 are pressed against each other.
    5 to each other during extrusion and tightly connected to each other. As can be seen from FIG. 4, the gas interfering layers 5 will also be hermetically sealed to each other in a pouring orifice. it
    0, a tight connection with each other of layers of different material takes place during the creation of a layered structure under the influence of heat and pressure that acts on the material web as it passes through the extrusion die and rollers.
    After the carrier layer 2 is supplied
    desired number of layers of material
    layered canvas must pass the second
    punching machine group, by
    In which the holes are punched once more in the places of the web material where earlier punching takes place. However, in the second run of the gueobivka, several smaller openings are cut out
    5 sizes than the holes that are cut out with earlier punching. As a result, the holes cut through the packaging laminate structure will be bounded around the entire circumference, which is formed by hermetically joined thermoplastic layers of the packaging laminate and metal foil serving as a barrier to gas. Under these conditions, edge 12 is cut off.
    5 carrier layer 2 is hermetically sealed
    thermoplastic layers converging in
    edge 14 in such a way that it cannot
    get in touch with the contents.
    In order to guarantee complete,
    0 providing liquid tightness with each other of the layers contained in the edge 14, and preventing the cutting edge of the metal foil remaining unprotected during the second piercing operation from contact with the contents, the heating and processing of the edge 14, so that the thermoplastic layers are included completely hermetically sealed to each other at the very time when they should leak
    around the edge of the metal foil, and seal it. This can be done simply, without the need for any additional materials, since the thickness of the metal foil 5 is only a fraction of the total thickness of the various thermoplastic layers. Regarding the typical thickness of the layers, it can be said that the metal foil is usually about 7 microns thick, although the combined thermoplastic layers have a thickness that usually exceeds 100 microns.
    Heating and processing of the edge 14 to achieve a leaktightness of the cutting edge 12 of the carrier blade, as well as the cutting edge of the metal foil, can be carried out by a special operation. However, it is preferable to carry out this operation simultaneously with the application and attachment of the covering strip 8 to the outside of the packaging laminate structure. The covering strip 8 is placed in the desired position on the outer side of the packaging laminate, on which the area of the covering strip 8, which is directly in front of the edge 14, is subjected to heating and at the same time squeezing together with the edge 14. At the same time, the thermoplastic layer 9 of the covering strips 8, facing edge 14 will be hermetically sealed in a manner that provides liquid tightness, so that a tight seal 11 is formed, which passes around the dispensing opening 7 and, on the one hand, seals nye edge of the carrier layer and a layer creating a barrier to gas and on the other hand, means allowing a liquid impermeable, sealingly connects the covering po- losu 8 to the packaging laminated structure.
    By constructing the machine, which is used for machining the edge 14 together with the seal, the corresponding part of the gas barrier layer 5 can be bent to the covering strip 8 so that it will almost come into contact with the blocking layer 9 of the covering strip and form a firmly attached gas impermeable - layer in the hole area.
    In this way, any subsequent gas exchange between the inside of the finished package and the surrounding atmosphere is prevented through the carrier layer 2 of the packaging layer structure or the outer thermoplastic layer 3. When a hole design of the type shown in FIG. 2 is to be made, the sealing layer 13 is applied later in the form of a free strip on the pouring opening and tightly connected by heat and pressure to the inner layer 6 of the packaging laminate, as well as thermoplastic layer 10 coating the strip. The sealing layer 13 can advantageously be applied at the same time as the outer covering strip 8, after the edge 14 has been treated in this way in the previous operation.
    When the preform is made with an opening according to the invention in its manufacture, it can be handled in the usual way and wound onto rollers, for example, for transport to a packaging machine in which the laminate is converted into separate packaging containers.
    权利要求:
    Claims (1)
    [1]
    Invention Formula
    A method of making a blank of packaging containers for liquids with a filling opening, comprising making a laminate by depositing layers of thermoplastic material on the fibrous carrier layer on both sides, punching the pouring hole and attaching a tear-off covering strip to the outer surface of the layered material that differs in that, in order to improve the hygiene of the containers, the pouring hole is punched in the supporting fiber layer before being applied to layers of thermoplastic material, which are tightly interconnected with heat and pressure in the area of the pouring hole, after which a second hole is punched in the layers of the thermoplastic material, coaxial with the first, but smaller, so that a pouring hole is formed, the length of which is limited parts of hermetically joined thermoplastic layers,
    eight
    FIG. 2
    6
    Editor I. Casard
    Order 2204 Circulation: Subscription
    VNIIPI State Committee for Inventions and Discoveries at the State Committee on Science and Technology of the USSR 113035, Moscow, Zh-35. Rauska nab .. 4/5
    FIG. five
    Compiled by V.Sorokina
    Tehred M.MorgentalKorrektor M.Sharoshi
    Fig.Z
    FIG. four
    类似技术:
    公开号 | 公开日 | 专利标题
    SU1745115A3|1992-06-30|Method of manufacturing blanks for package containers with liquid discharging opening
    US4989736A|1991-02-05|Packing container and blank for use in the manufacture thereof
    US4267937A|1981-05-19|Tear opening device for containers
    US5553942A|1996-09-10|Laminate for producing packaging containers
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    SE8105092L|1983-03-01|PACKING CONTAINER FOR PACKAGING CONTAINERS WITH PRESSED FILLING GOODS
    US4627221A|1986-12-09|Method for producing sterile packages
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    KR20190039543A|2019-04-12|Lead ring
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    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
    SE441666B|1985-10-28|
    JP2726036B2|1998-03-11|
    EP0155600A3|1987-04-15|
    SE8401558L|1985-09-22|
    SE8401558D0|1984-03-21|
    JPH09301360A|1997-11-25|
    EP0155600B1|1988-09-21|
    DE3565089D1|1988-10-27|
    AU570781B2|1988-03-24|
    CA1229562A|1987-11-24|
    EP0155600A2|1985-09-25|
    AT37338T|1988-10-15|
    JPH0649496B2|1994-06-29|
    AU4023585A|1985-09-26|
    JPS60217946A|1985-10-31|
    US4595116A|1986-06-17|
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    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    SE8401558A|SE441666B|1984-03-21|1984-03-21|OPENING DEVICE FOR PACKAGING CONTAINER AND WAY TO MANUFACTURE IT|
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