• 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:DK200800120U1
    申请号:DK200800120U
    申请日:2008-06-13
    公开日:2008-07-25
    发明作者:Exner Ronald Herbert；Dagestad Olav
    申请人:Kraft Foods R & D Inc；
    IPC主号:
    专利说明:

    1DK 2008 00120 U3
    Technical area
    The invention relates to a resealable packaging.
    In particular in the field of food product packaging, it is desirable to provide the consumer with a package that is both easy to open and resealable. With re-sealable packaging, it is a problem that the strength of the seal is reduced with each opening and re-closing. In particular, the packaging on the one hand could be resealable, but in the resealed state the seal could not be strong enough to retain parts of a product such as crumbs or small pieces of chocolate, or a relatively large remaining portion of a product such as a chocolate bar or tablet when only a minor portion thereof has been consumed. At the same time, when the strength of the re-sealed seal is relatively high, the consumer could get the impression that the packaging is not in a re-sealed but in its original state not yet opened. Therefore, it is desirable that the strength of the re-sealed seal is considerably lower than the strength of the original, not yet opened seal, but high enough to provide a reliable seal in the re-sealed state of the package.
    Prior art
    Applicant EP 1 288 139 A1 relates to a package which is simple to open and can be re-sealable.
    Applicant's EP 1 714 895 A1 discloses a resealable packaging having a tamper-proof property. In other words, when the package has initially been opened, this is visually indicated to the consumer, so that the consumer is provided with the information that there has been an initial opening and that the packaging is not in its original, unopened state but in a closed state. .
    With respect to both the packages described above, it should be noted that the invention described below, including all of its embodiments and preferred features, may be applied to the packages described in the above documents. Thus, the contents of these 2 2DK 2008 00120 U3 documents, in particular with regard to the features of the packaging and the sealing thereof, are included herein by reference, and shall! is considered the subject of the present application.
    Brief Description of the Invention
    It is an object of the invention to provide a package which is improved in terms of its reclosing properties.
    The object is achieved by the article according to one of claims 1 or 2. Preferred embodiments are the subject of the further claims.
    In accordance with a first achievement of the above purpose, a resealable packaging for food products has a seal formed between a first and a second sealing portion. The sealing portions may be provided as portions of a substrate constituting the packaging. In other words, the substrate may conveniently be folded down on itself so that a seal may be formed between the portions thereof. In particular, the packaging according to the application may be provided as a so-called flow package having a so-called fin seal provided in parallel with a direction of an axis about which the substrate is folded to form the packaging. Furthermore, end seals may be provided at the ends. For purposes of the present application, one or more of the end seals and / or the fin seals may be provided with the features described below to improve resealability. However, only some of the seals can be formed as described below to improve the resealability only in these areas.
    The seal is formed by a cold seal applied between the first and second sealing members. The cold seal may be provided on the first and / or second sealing portion of a pattern. The cold seal can be an adhesive. It has been found in the context of the present invention that a gold seal is best suited to provide improved resealability. In this context, it has been found, in particular, that the resealability characteristics 3 3DK 2008 00120 U3 can be improved when a cold seal is formed between a first and a second sealing member, in which the bonding force of the cold seal to the first and second sealing members is greater than the bonding force before. in the cold seal. This causes the cold seal to separate when the package is opened and the seal is broken. As a consequence, the cold seal partially adheres to the first sealing portion and partially adheres to the second sealing portion. This behavior of the cold seal leads to a resealable package having a seal which provides a sufficient initial seal force as well as reseal and a post-closure seal force high enough to retain the products or parts thereof, and at the same time is somewhat smaller. than the original binding force, so that the consumer can advantageously feel that the packaging is in the closed state.
    This can be called a cohesive split and is particularly advantageous in that the cold seal will reliably join the first and second sealing portions, and will not tear an upper layer from the first and second sealing portions when the seal is opened. In manufacture, it is presently preferred to apply the cold seal to both the first and second sealing members. When the packaging is sealed, these sealing parts are brought together and the cold seals of both sealing parts are bonded together. This has been found to provide a good basis for the desired cohesive cleavage when the seal is broken, leading to superior resealability. As described in more detail below, the first and second sealed portions may be provided as portions of a substrate having different layers. When the bond between the cold seal and the top layer of the sealing portion (on which the cold seal is provided) is too high, there is the risk that the cold seal will separate the upper layer from the substrate. This is not desirable as it impairs the reliability of the reseal. In particular, this reliability can be ensured when one part of the cold seal becomes with the first and another part of the cold seal becomes with the second sealing part, so that these parts of the cold seal are brought together when the packaging is closed. In other words, the cold seal is separated according to its thickness. Therefore, when a certain surface portion is considered, the part of the cold seal which is closer to the first sealing part is then adhered to the first sealing part and the part of the cold seal which is closer to the second sealing part is adhered to. the other sealing part. This cohesive cleavage takes place in at least 50%, preferably at least 70%, and most preferably in 100% of the area of the cold seal. In some parts, the cold seal may adhere completely to the first or second sealing portion, which will not impair the resealability characteristics.
    Second, a resealable package according to the present invention may be provided by a package having a seal having an initial opening force of 2, preferably 2.5, to 4 N / 15 mm, and opening forces for one or more resealing seals of 0. 5 to 2 N / 15 mm, preferably 1 to 1.5 N / 15 mm. The forces given correspond to the force required to pull off a strip of material having a width of 15 mm and provided with the described seal. In particular, this force can be measured in accordance with the concept of DIN 55529. Firstly, the given forces have been found to provide sufficient initial opening force, which at the same time is not so high that the consumer will have difficulty opening the packaging. The opening forces of the re-closed state are, firstly, high enough to withhold the product or parts thereof and, secondly, considerably lower than the original opening force, so that the consumer can feel the difference between the re-closed state and the original, not yet opened state. The opening force can become smaller and smaller with more recloses. However, it is presently preferred that the opening force is still above 1 N / 15 mm after the fourth re-closure. Furthermore, the opening force may be above 2 N / 15 mm for the first re-closure, provided the initial opening force is still somewhat higher, for example above 2.5 N / 15 mm. The above values have further been found to be effective in avoiding delamination of the first and second sealing members. As mentioned above, these parts will usually be provided as parts of a film-type substrate having different layers. If the bonding force between the cold seal and the top layer of the substrate is too high, there is a risk that the top layer of the substrate will be separated from the substrate along with the cold seal. As mentioned, the above values for the binding forces prevent this undesirable situation from happening.
    The packaging disclosed herein is particularly suitable for solid or pieces of food products such as chocolate, cheese slices that may be wrapped, cookies, (health) food rods, etc. The packaging disclosed herein is also suitable for solid or pieces of non-food products for which it is advantageous to provide a package that is easy to open and / or reseal.
    Finally, the resealability characteristics can also be improved when at least one of the first and second sealing members has a relatively low surface roughness, in other words, relatively smooth. This can be achieved, for example, by an acrylic coating or a primer with which the first and / or the second sealing portion may be coated. It has been found that the cold seal will undergo a so-called cohesive cleavage when the package is initially opened. In other words, a portion of the cold seal will remain on the first surface portion and a portion of the cold seal will remain on the second surface portion when the seal is initially opened, ie. when the first and second surface parts are separated. It has been found that the resealability characteristics are particularly good when such a cohesive cleavage is achieved. When the packaging is resealed, the separated portions of the cold seal are brought together to provide a bonding force which has been shown to be high enough to retain the product as well as small pieces thereof, such as crumbs, even after numerous, for example, five or six, reseals. At the same time, the consumer may feel that the packaging is not in its original closed state but in a re-closed state, so that a smaller opening force than originally used is required. Thus, improved resealable packaging can be provided. The resealability is more consistent and reliable with all embodiments described herein.
    With respect to the desired surface roughness, the cohesive cleavage of the cold seal as well as the desired bonding forces, it has been found in the context of the present invention that it is advantageous to coat the first and / or second seal 6 part 2008 00120 U3 part, preferably with an acrylic coating or primer. The aforementioned coating may be applied in an amount of 0.5 to 1.5 g / m 2, preferably about 0.9 g / m 2. Tests have shown advantageous characteristics using these values.
    This also applies to the preferred type of cold seal, namely a natural, latex based cold seal. For such a seal, it has been found that the pull opening could be effected with a low threading or webbing effect.
    In general, the preferred cold seal can be described as being a "hard" cold seal, compared to a conventional "soft" cold seal having a relatively high rubber content and a relatively low content of polymers. The high rubber content leads to an undesirable wire forming or skin forming effect in which strands of cold seal are separated from the sealing parts. In contrast, the preferred "hard" cold seal contains less rubber and more polymers or copolymers, especially acrylic polymers or copolymers. In this context, a polymer / copolymer content above 30%, preferably above 50%, and even more preferably above 70%, will be advantageous. In particular, it has been found that a cold seal containing at least one acrylic polymer or copolymer provides good resealability. In particular, such a type of cold seal can advantageously be combined with an acrylic coating on the first and / or second sealing member. It has been found that this combination provides particularly good accuracy characteristics and leads to a reliable cohesive cleavage as described above. However, one explanation to which the invention is not limited is that the acrylic coating and the acrylic polymer or copolymer provide good anchoring to one another.
    In this context, it is presently preferred that the cold seal contain at least one styrene acrylic polymer or copolymer, preferably two different kinds thereof. In particular, a softer styrene acrylic polymer or copolymer can have relatively long molecules, and together with the rubber, in particular a natural latex-based rubber, will provide a good original seal.
    In particular, superior test results were obtained with a cold seal which was a Swale grade 8113, which is therefore preferred in the invention.
    Tests have also been performed for the most advantageous amount of cold sealing applied. In this context, very good results could be obtained with an amount of 3 to 5, preferably 3.5 to 4.9 g / m 2 in each sealing member.
    Example
    For example, the packaging of the invention may be formed of a substrate having the following structure. The total thickness of the film constituting the substrate on which the first and second sealing portions are provided may be between 60 µ and 70 µ. Starting at the outside of the package, a flame-treated OPP (oriented polypropylene) release layer having a thickness of about 3 µ may be provided to prevent blocking of the film and / or peeling of the cold seal. Preferably, as the next layer towards the interior of the package, a clear OPP core having a thickness of about 14 µ is provided to provide stiffness to the substrate, protect the ink mentioned below which is used to apply graphic information, and provide a shiny appearance.
    Next, a corona treated OPP separating layer of about 3 µ is provided to promote bonding. Next, an amount of 2 to 3 g / m 2 adhesive is provided to bond the above OPP films.
    Approximately 1 to 4 g / m2 of ink is applied to the inside of the packaging to display graphical information.
    Next, about 0.9 g / m 2 of acrylic coating is provided against the interior of the package as a flavor barrier and / or a surface suitable for pressing.
    Next, about 0.3 g / m 2 of primer for adhesive coating is provided. As a next layer to the inside of the package, there is an OPP skin layer having a thickness of about 3 µ to protect the core layer mentioned below. For example, the core layer is formed of a super-white, opaque, cavitated OPP having a thickness of approximately 27 µ to 37 µ to provide rigidity, opacity and light protection.
    Another OPP skin layer of approximately 3 µ is provided against the inside of the package to protect the above core layer. Preferably, against the interior of the package, there is a primer in an amount of about 0.3 g / m 2 for adhesive coating. Next, in the preferred example, an acrylic coating is provided in an amount of about 0.9 g / m 2 to provide a flavor barrier and a surface having a good smoothness or surface roughness below a predetermined value to provide a surface which is suitable for applying a cold seal pattern. The cold seal is preferably applied in an amount of about 4 g / m2 to provide a seal which is preferably simple to open and reseal.
    In the case of the bonding forces, and in so far as they have not yet been mentioned, the adhesive strength of the cold seal to the first and / or second sealing part, in other words to the acrylic coating in the above example, is preferably between 4.5 and 7 N / 15 mm to achieve the cohesive cleavage described above. Accordingly, the adhesive strength between the acrylic coating and the primer is preferably higher than the strength 20 between the cold seal and the acrylic coating to avoid delamination, in other words to avoid the effect of the cold seal removing the acrylic coating from the substrate.
    权利要求:
    Claims (10)
    [1]
    9 9GB 2008 00120 U3
    [2]
    1. Reclosable packaging having a cold seal formed between a first and a second sealing portion, wherein the bonding force of the cold seal to the first and second sealing portions is greater than the bonding force within the cold seal so that the cold seal is separated and partially adhered to the first, and partly book ten! the second sealing portion when the seal is opened.
    [3]
    2. Reclosable packaging having a seal with an initial opening force of 2, preferably 2.5, to 4 N / 15 mm, and opening forces for one or more re-closures of 0.5 to 2 N / 15 mm, preferably 1 to 1.5 N / 15 mm.
    [4]
    Reclosable packaging according to any one of the preceding claims, characterized in that at least one of the first and second sealing parts is coated, preferably with an acrylic coating or a primer.
    [5]
    Reclosable packaging according to any one of the preceding claims, characterized in that the coating is applied in an amount of 0.5 to 1.5 grams / m2, preferably about 0.9 grams / m2.
    [6]
    5. Re-sealable packaging according to any one of the preceding claims, characterized in that the cold seal is a natural, latex based cold seal.
    [7]
    5. Re-sealable packaging according to any of the preceding claims, characterized in that the cold seal contains at least one acrylic polymer or copolymer.
    [8]
    Reclosable packaging according to claim 6, characterized in that the cold seal contains at least one styrene acrylic polymer or copolymer, preferably two different types thereof.
    [9]
    8. Re-sealable packaging according to any of the preceding claims, characterized in that the cold seal is a Swale grade 8113.
    [10]
    Reclosable packaging according to any one of the preceding claims, characterized in that the cold seal is applied in an amount of 3 to 5, preferably 3.5 to 4.9, gram / m2 on each sealing part.
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    同族专利:
    公开号 | 公开日
    DK200800120U3|2008-08-22|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    法律状态:
    2017-01-27| UUP| Utility model expired|Expiry date: 20161229 |
    优先权:
    申请号 | 申请日 | 专利标题
    DK200800120U|DK200800120U3|2008-06-13|2008-06-13|Resealable packaging|DK200800120U| DK200800120U3|2008-06-13|2008-06-13|Resealable packaging|
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