Standing packet with optimised rupture characteristics in case of opening and method of its making

FIELD: packing industry.

SUBSTANCE: standing pack, according to invention, has body and bottom, first of all, stable bottom, at the same time, at least material of packet body comprises at least one uniaxially oriented film, besides uniaxially oriented film is part of layer material and has high thickness compared to other layers of material. Thickness of uniaxially oriented film may be more than thickness of all other layers of layer material.

EFFECT: packet may be opened in a simple manner without complete damage or uncontrolled rupture of the whole pack and may be used further after opening.

11 cl

 

The present invention relates to erect package, and method of its manufacture in accordance with the restrictive part of items 1 and 13 of the claims.

Standing packages of the specified type are widely used instead of paper and plastic bags and bottles, tin cans and cardboard boxes for the packaging of solid, liquid and pasty food and taste of the products and commodities of any type.

Standing bags have over the above conventional packaging numerous advantages, which primarily include low weight and high durability at simultaneous simplicity and economy of manufacture, and good suitability for recycling, not associated with particular problems.

However, the lack of standing packages when their practical application is often the poor performance of the autopsy, when the strain of standing package, for example, in the place provided he cut stand-up bag often uncontrollably torn, resulting in its full damage and rash or pouring out its contents. Further the use of such an opened package is completely excluded.

To solve this problem, we developed the variety provided in the package and simplify its skriti the supporting means, as an example, which can be called a tear thread or perforation, and which, however, complicated and expensive manufacture of standing packages, or was proposed to use additional improvised tools like scissors or knives, which, however, are not always available at hand.

For the reasons discussed above, there is a need for standing the package, which could be open in a simple way without full damage or uncontrolled rupture of the entire package and which could be used in the future after its opening.

Based on the foregoing, the present invention was based on the task to offer a simple and economical in manufacture of stand-up package with the above properties without inherent in the known from the prior art packages shortcomings, which along with its versatile application would be made from simple utilization of material with high durability.

This task is solved by means of standing package, as claimed in claim 1 claims, as well as using its method of preparation stated in clause 13 of the claims. The objective of the invention is solved primarily through standing package, which has a body and a bottom, first and foremost stable bottom, and at least the body material which contains at least one of Odeon the oriented film.

In this regard it should be noted that in accordance with the present invention under standing service means any work of film and/or multilayer material (laminate) capacity, including, in particular, and bag package, with a separate/separate / attached/annexed part/parts in the form of the bottom and/or plocica, and/or cover, or without such/those items/parts.

An important aspect of the present invention is that in uniaxial oriented film forming its molecular chain flattened and oriented mainly parallel to the direction of extrusion of the film. Thanks subjected to orientation stretching the material has a tendency to delamination (gap), mainly in the direction parallel to the direction of extrusion, and not at an angle thereto, and therefore oblique gap of the material makes it difficult or even impossible due to the uniaxial orientation of the molecular chains.

Another advantage of the use of uniaxially oriented film is that when it delamination, respectively, the gap in a direction parallel to the direction of stretching, you do not need to disconnect the molecular chain, or "pull" them from the totality of chain macromolecules, since the film forming material of the molecular chain does not collapse is you in the balls, and are more or less exactly next to each other. Thus, the gap is similar to the uniaxially oriented film in a direction parallel to the direction of stretching, you want to make a much smaller compared to conventional films breaking strength, which is 50-60% less disruptive force that must be applied to normal is not subjected to stretching or biaxial oriented film.

In accordance with this standing package that at least one intended for dissection part made of uniaxially oriented films, has been optimized compared to conventional stand-up packages characteristics of the gap at the showdown taking place with the formation of a smooth and uniform edges, following along the direction of extrusion of the film. At the opening of similar standing package there is no fear of uncontrolled spread of the gap over the whole body of the package, making without any problems, you can print and stand-up pouches with liquid without risk of overflow.

As described above, according to the invention have proposed in the invention of standing package at least one tear at the opening part of his body is made of at least one uniaxially oriented films. However, it should be noted that one of these is the SNO-oriented film can be performed and the entire body erect package, and the base, respectively, stable bottom and the cover, respectively United with her shoulder.

In one variation of the uniaxially oriented film is part of a layered material (layered structure), which may have a barrier layer. Uniaxially oriented film made according to the invention of at least one polyolefin and/or a complex ester, and the preferred materials for the fabrication of uniaxially oriented films are polyethylene and/or polypropylene and/or polyethylene terephthalate. An optional barrier layer may be formed, for example, ethylvanillin alcohol or deposited on the layered material of metal or may be used in the form of a film. In another embodiment, the barrier layer may be formed by a material of, for example, glass-like substances, which may contain SiO2. When using polyethylene and/or polypropylene as the material of uniaxially oriented films of these polymers can be provided in pure form or in the form of coextruded, as well as in combination with polyethylene terephthalate.

As the metal for the execution of the barrier layer is used primarily aluminum, however, depending on the purpose of standing package can be used by other, preferably corrosion-resistant metals.

Coz the ACLs to the invention the barrier layer is located on at least one suitable for heat sealing layer and preferably forms a layer, for example, between the polyethylene terephthalate and polypropylene or polyethylene. It is obvious that the structure of the layered material may be provided and several barrier layers, with preferably at least one of the outer layers, a first outer layer shall be suitable for heat sealing.

According to the invention uniaxially oriented film or a few of uniaxially oriented films has/have a greater thickness in comparison with the other layers of the layered material.

In addition, in accordance with the invention the thickness of the uniaxially oriented film should be greater than the thickness of all the other layers of the layered material and should be from 10 to 200 μm, preferably from 35 to 155 μm, most preferably from 45 to 95 microns.

When this condition is characteristic of the gap standing package when the opening is essentially uniquely determined by one or more of uniaxially oriented films.

It should be noted that for making the offer in the invention of standing package you can also use pellets that has a very good explosive properties, as well as having a high melt index and molecular structure is oriented in a direction coincident with the direction of the gap standing package when it was opening.

In one of the PR is pactically of embodiments of the invention are fabricated using uniaxially oriented films stand-up bag is suitable for sterilization. In this case, as the material uniaxially oriented film, it is preferable to use polypropylene, whereas for the manufacture does not require sterilization standing packages preferred, cost-effective and acceptable material uniaxially oriented film is polyethylene.

In one of the embodiments of the invention the housing of standing package made in the form of a sleeve extrusion or by lap or rantovoe connection with each other, the edges of the slabs TermoSanitari with obtaining the standing of a package bag package with optimized rounded shape of its body.

Stability proposed in the invention of standing package are mainly provided by at least one uniaxially oriented film, the use of polyethylene terephthalate contributes mainly to give standing package mechanical stability, and the use of polypropylene and/or polyethylene contributes mainly to give standing to the package shape (stiffness).

In the most preferred embodiment of the invention in the case of standing package, such as heat-sealed seam, is provided to facilitate the breakdown of the package supporting means, first of all cut or similar to set the direction of opening the package place of pengenalpastian, which allows you to initiate the rupture of the material standing of the package in a direction parallel to the direction of stretching uniaxially oriented films.

Such auxiliary means for facilitating the strain, respectively rupture of the material standing of the package provides a focused his anguish, while facing the package peak strain, respectively notch goes into the seam along which subsequently opened the package, respectively, leads to the splitting of the uniaxially oriented film by opening the package.

Fundamentally, however, it should be noted that the presence of such auxiliary tools to help strain the material standing of the package is not strictly required because the opening offer in the invention of the package to him you want to make a much smaller compared to conventional stand-up packages breaking strength, and depending on the film thickness, respectively, of the laminate accurate opening standing the package on a clearly defined straight line break can also be assured by, for example, tear or cut the nail or other ribbed object.

In line with this, there is no need to take measures according to the prior art to facilitate the opening of standing package, such as technical with what you can supply laminate or film closed up in him, accordingly, in her tear-off threads or strips or perforations, which thus refers hole punched or laser perforation with all their inherent disadvantages. Thus, the manufacturer proposed in the invention of standing package provides a significant reduction of production costs and cost of materials, as for making proposed in the invention oriented film and for making it erect package with barrier layers or without them, it is enough to apply a common and very cheap materials, such as polyolefins and/or polyamides, for example polypropylene, polyethylene or polyethylene terephthalate.

Underlying the invention the task is solved with the help of its proposed manufacturing method of standing package, namely, that

a) produce a thick film;

b) thick film subjected to a uniaxial orientation stretching;

C) uniaxially oriented film laminate;

g) form a stand-up bag;

d) standing on the package do not necessarily have set the direction of its opening, the place of reduced strength, primarily ease the strain of the package supporting means, providing the possibility of a rupture of the package in a direction parallel to the direction the stretching uniaxially oriented films.

For the manufacture of thick film using a polyolefin and/or polyamide, for example polyethylene or polypropylene, or their coextruded. For the manufacture of thick film equally possible to use polyethylene terephthalate.

In one of the options proposed in the invention method, phase a-b can be performed simultaneously or kvaziodnorodnoj, primarily during the extrusion. When you do this directly in the manufacturing process of the layered material to form its layers or between them can be applied barrier layer.

Similarly layered material can be produced, respectively, primarily to ekstradiroval and, if necessary, thermobaricity, in the form of a flat film or in the form of a sleeve formed of lap or rantovoe connection with each other of the longitudinal edges of the flat material TermoSanitari.

Other embodiments of the invention are given in the dependent claims.

Below the invention is described in more detail on the example of two variants of its implementation.

In the manufacture of the proposed standing in the invention of the first package of polypropylene and polyethylene terephthalate get on a thick film. Then the polyethylene terephthalate and polypropylene thick film subjected to a uniaxial orientation stretching pradolina direction. Next on oriented polypropylene film with a thickness of 70 μm, put a layer of aluminium of a thickness of 8 μm. The aluminum layer, in turn, laminated above-oriented polyethylene terephthalate film whose thickness is 12 μm.

From the obtained as described above laminates with barrier properties by lap-joints with each other its longitudinal edges of TermoSanitari form a bag body of the package, the underside of which (corps) in TermoSanitari warawut bottom with barrier properties, e.g. deep drawing. Top bag package sealed by heat sealing the edges of the layered material rantovoe seam. At the lower end of this rantovoe heat-sealed seam as facilitating the breakdown of the package supporting means perform the incision, when the strain at which the upper part of the package along with her rantovoe heat-sealed seam comes off and you open the package. Removing the top rantovoe heat-sealed seam, which package in its closed condition was pulled from above the package again punishes and takes typical of his bag body rounded (cylindrical) shape, wherein due to the expansion of the service level of its contents, a few drops that fill the nutrient reduces the risk of accidental spilling or leakage of the contents of the package.

In the second variant of the first polypropylene is made thick film, which is then subjected to uniaxial orientation stretching in the longitudinal direction to reduce its thickness up to 70 mm. Polyethylene terephthalate made the second thick film, which is also subjected to uniaxial orientation stretching in the longitudinal direction to reduce its thickness to about 12 microns. Both of these oriented films together with placed between aluminum foil of a thickness of 8 μm is made flat layered material.

Made of laminated material is cut out on the sheet front and back sides of the body erect package. Next, the front and back side of TermoSanitari interconnected along their outer edges by a seam width of about 3 mm to be manufactured a case of standing package TermoSanitari warawut the bottom of the V-shape of the bent or folded blanks.

Top stand-up bag after filling it sealed, for example, by heat sealing the edges of the layered material rantovoe seam. Then on one of the side rantovoe heat-sealed seams help fulfill the strain of the package of support means in the form of a cut, when the strain at which standing package, you can initiate further its disclosure.

Easy on the output of the package supporting means can be provided not only with one, but with both sides standing package.

If necessary, the opening of standing package it first tear in the side of the incision, from which a further gap of the films due to their uniaxial orientation is in the direction of extrusion parallel to the bottom of the package, as compared with the opening of a regular standing package requires much less effort.

If necessary, near the break line, asked to facilitate opening the package, the cut and the direction of extrusion of films, it is possible to provide embossing.

It should be noted that all of the above distinctive features of the invention can be used individually or in any possible combination. In addition, in the above embodiments of the invention can be made of various, obvious to a person skilled in this field changes, while staying within the scope of invention.

1. Stand-up package with case and bottom, first and foremost a stable bottom, characterized in that at least the material of its body contains at least one uniaxially oriented film, and uniaxially oriented film is part of the layered material and has a greater thickness compared to the other layers of the layered material.

2. Stand-up bag according to claim 1, characterized in that the thickness of the uniaxially oriented p is Enki greater than the thickness of all the other layers of the layered material.

3. Stand-up bag according to claim 1 or 2, characterized in that at least one uniaxially oriented film contains at least one polyolefin and/or polyamide, and/or ester, especially polyethylene and/or polypropylene and/or polyethylene terephthalate.

4. Stand-up bag according to claim 1 or 2, characterized in that the thickness of the uniaxially oriented film is from 10 to 200 μm, preferably from 35 to 155 μm, most preferably from 45 to 95 microns.

5. Stand-up bag according to claim 1 or 2, characterized in that the laminate comprises at least one barrier layer.

6. Stand-up bag according to claim 5, characterized in that the barrier layer contains ethylenically alcohol, and/or SiO2and/or a metal, especially aluminum.

7. Stand-up bag according to claim 1 or 2, characterized in that it is suitable for sterilization.

8. Stand-up bag according to claim 1 or 2, characterized in that its body is made in the form of a sleeve extrusion or by means of lap and/or rantovoe connection with each other, the edges of the slabs TermoSanitari.

9. Stand-up bag according to claim 1 or 2, characterized in that it is provided to facilitate the breakdown of the package supporting means, first of all cut or similar to set the direction of opening the package place of reduced strength, which allows you to initiate the rupture of the material standing of the package in which UPRAVLENIE, parallel to the direction of stretching uniaxially oriented film.

10. A method of manufacturing a standing package according to claim 9, characterized in that:
a) produce a thick film,
b) thick film subjected to a uniaxial orientation stretching,
C) uniaxially oriented film laminated,
g) form a stand-up bag,
d) standing on the package provide for specifying the direction of its opening, the place of reduced strength, primarily ease the strain of the package supporting means providing a gap package in the direction parallel to the direction of stretching uniaxially oriented film.

11. The method according to claim 10, characterized in that stage a)-C) are performed simultaneously or kvaziodnorodnoj, primarily during coextrusion.
Priority items:

03.06.2004 according to claims 1 to 10;

17.05.2004 according to claim 11.



 

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