Packaging laminated material and packaging containers manufactured from the same

FIELD: laminated material for manufacture of packaging containers by folding and thermal sealing and packaging containers for liquid food products manufactured from said material.

SUBSTANCE: packaging material 10 has central layer 11 of paper or cardboard and layer 12 of polyolefin with mineral filler on one side of central layer. Layer 12 with mineral filler has thickness of from 30 micron to 100 micron and has mineral particles in an amount of from 40% to 70% by weight of layer 12 with mineral filler. Both sides of central layer are provided with water-impermeable coating of polyolefin.

EFFECT: increased rigidity and provision for manufacture of containers with improved capturing properties.

8 cl, 4 dwg

 

The present invention relates to the packaging laminirovannom material containing a Central layer of paper or cardboard and designed for the manufacture of a packing container for liquid food products. The present invention also relates to a packaging container made of such packaging material.

Packaging is often used consumables (disposable packaging containers for the transportation of such liquid food products, such as milk and juice, and a very large group of these so-called disposable packaging is made from laminated packaging material consisting of a Central paper or cardboard layer and outer, impermeable to liquid coatings of plastic, usually polyethylene, on both sides of the Central layer. Conventional disposable packaging, for example, milk is often made from the packaging material, with a rigid, but bendable Central paper or cardboard layer and an outer, impermeable to liquid coating of plastic, preferably of polyethylene, on both sides of the Central layer. Such disposable packaging has sufficient mechanical strength and stability, allowing it to withstand external loads to which the packaging container is subjected during typically the transportation and handling, this disposable packaging has sufficient impermeability that provides effective prevention of the penetration of packaged fluid sensitive to the effects of liquid paper or cardboard layer.

However, single-use packaging made from laminated packaging material made of paper or paperboard and outer, impermeable to liquid coatings of polyethylene like disposable packaging, described above, has no facility for gases or has insufficient proof against gases and, therefore, cannot be used for the packaging of, for example, juice and cooking oil, which quickly deteriorate and decompose when in contact with gaseous oxygen. To give a single package sufficient proof against gases, in particular for gaseous oxygen, so it can be used for storing sensitive to the effects of gaseous oxygen products to conventional packaging laminate add at least one additional layer of material having the desired properties of permanence.

Examples of such materials can be both organic and inorganic materials, but usually such materials are aluminiumwolle (Alifoil) between the Central layer and the outer, impervious to liquid plastic coating on the inside a single package. Aluminum foil is almost completely gas-tight and, in addition, has the main advantage compared to, for example, with other barrier layers made of organic polymers, for example of the hydrolyzed copolymer of ethylene and vinyl acetate (so-called EVOH), due to the fact that it provides a simple, but fast and effective heat sealing of the packaging laminate through induction of heat sealing. As mentioned above, already there are many industrial manufactured disposable packages of various sizes and shapes designed for liquid food products. A very well-known example is disposable packaging parallelepipedal form, which is sold under the trademark Tetra Brik®and which is most commonly used for such liquid food products, such as milk, juice, etc. Tetra Brik®is a container with a tubular body of rectangular cross-section and merged with him essentially flat end closing sections with four triangular corner flaps with double walls that are angled down and still welded to the adjacent outer wall with an external SRT is ony packaging. Another well-known example of industrial manufactured disposable packaging for liquid food products is the packaging design with the trademark Tetra Rex®. This package is a container with a tubular body of square cross-section and with an essentially flat bottom closing portion and a roof-top closing section, forming one piece with the tubular body of the container. Another example of a well-known industrial manufactured disposable packaging for liquid food products is the packaging with the trademark Tetra Top®and which, like both of the above-mentioned single packaging is a container with a tubular body and an essentially flat bottom closing section, forming a single unit with the tubular body of the container. The Tetra Top®different from the two previously mentioned packages mainly due to the fact that the tubular body of the container has an essentially round cross section, and the upper closing element is formed is obtained by molding a plastic lid with a peripheral annular, downward directed flange, through which the plastic cover still welded to the inner side of the tubular body of the container by providing an impenetrable the STI with respect to the liquid.

Disposable packaging the above-described types of the most often made through the use of modern filling machines, which provide the forming packages from a tape or from prefabricated blanks of factory manufacturing of the laminated packaging material, filling and sealing of finished consumer packages in accordance with the so-called technology of forming/filling/sealing.

Thus, mechanically strong and stable dimensions, disposable packaging is made from a sheet or band-shaped packaging laminate consisting of a Central layer of paper or paperboard and outer, impermeable to liquid coatings of plastic, preferably polyethylene, with the required physical properties to ensure impermeability to liquids and to gases, in particular for gaseous oxygen to promote reliable transportation and storage of Packed liquid food product.

Although the above-described known packaging laminate material consisting of a Central layer of paper or paperboard and outer, impermeable to liquid coatings of plastic, preferably polyethylene, contributes to reliable transportation and storage upakovannogo the food product, sometimes problems can occur in cases when emptying packing her grasp and lift with one hand, covering at least part of the tubular body of the package. More precisely, it was found that the compressing force is exposed to packing when her grasp and raise when emptying, must sometimes be so large that it will even exceed the stiffness of the packaging mechanical grasping it, resulting in a wall of the packaging under the applied compression force of aim devlists inside the package, which causes unintended pouring and spilling the contents due to the volume reduction caused by this indentation.

The problem, inadvertently spilling during emptying of the packaging, it can be considered as more or less harassing and botheration to the consumer, but it is becoming more obvious with the increase of the volume of Packed fluid, since the package contains a large amount of liquid is heavier compared to a package containing a small volume of liquid, and therefore requires a correspondingly greater compression force of at catching packaging hand to provide the possibility of lifting while pouring the contents. This problem is also partly linked to the geometry of the th configuration of the packing and sizes and can be especially obvious in the case if the packaging has a tubular body of the container with a very large ratio between the length of the body of the container and the diameter of the container or the smallest cross-sectional dimension. However, this problem can be particularly troublesome in the case of disposable packaging, which has a tubular body of the container without the vertical, which add rigidity to the bent or angular edges, continuing along the entire length between the upper and lower end parts of the package.

Previously, attempts were made to solve the above problem associated with conventional disposable packaging, using as a starting point for solving this problem increase the rigidity of the packaging material by increasing the thickness of the layer of paper or cardboard. However, the layer of paper or paperboard, having increased thickness makes the packaging laminated material is thick and thereby creates unnecessary difficulties in forming the package by bending especially in areas where overlapping layers of material must be folded in half, as almost always happens when the packaging laminated material is converted into finished disposable packaging. More specifically, the material cost of the paper or cardboard excessively high, and thus, increasing the thickness of the paper or cardboard will entail quite rescuerevenue packaging costs, associated with the cost of the packaging laminated material.

Another attempt to solve the above problem, it was used as another starting point, the increase in rigidity of the laminated packaging material by means of an additional layer of aluminum foil on one side of the paper or cardboard tape, but it also leads to a sharp increase in the cost of the packaging material due to the very high costs associated with manufacturing and cost of aluminum foil. In addition, the aluminum foil has a very low degree of plasticity and low ability to stretch and as a result easily crack when exposed to strong tensile stresses and bending that occur in the conversion process of the packaging material in the packaging, especially in those areas where overlapping areas of the packaging laminate should be folded in half.

Thus, in the art there is still a need for simple and economical way to solve the problems described above associated with conventional disposable packaging.

Accordingly, the present invention is to eliminate or at least substantially ameliorate the above problems emptying associated with manufactured fibrous, one is mi packaging for liquid food products according to the prior art.

Another objective of the present invention is to create a packaging laminated material described in the introduction of the type having a stable sizes, made fibrous, disposable packaging having improved properties during its capture and emptying without due to this improvement of the excessive increase in the cost of materials for the manufacture of this packaging laminated material.

Another object of the invention is to create a packaging laminated material containing a Central layer of paper or cardboard and designed for disposable packaging, which has a tubular body of the container without the vertical, which add rigidity to the bent or angular edges, continuing along the entire length between the upper and lower end parts of the package.

These and other objectives and advantages are achieved according to the present invention with a packaging laminated material, characterized by the characteristics of claim 1 of the claims, and using disposable packaging, characterized by signs of paragraph 6 of the claims. Preferred embodiments of the laminated packaging material and disposable packaging according to the invention have the additional characteristics listed sootvetstvenno is in dependent claim 2 to 5 and 7 and 8 claims.

Thus, in accordance with the first object of the present invention proposes a packaging laminated material in order to increase its rigidity includes a layer of polyolefin with a mineral filler, which is applied on one side of the layer of paper or paperboard in which the percentage mass fraction of mineral particles is from 40 to 70% of the total mass of the layer with mineral filler.

The packaging laminated material containing a Central paper or cardboard layer and a layer of polyolefin with mineral filler, has significant advantages compared with the above packaging materials of the prior art.

The packaging laminated material according to the invention does not require complex equipment or complicated processes to obtain, but can be obtained in a simple way on the existing process equipment.

The packaging laminated material according to the invention also has significant advantages in terms of cost compared to the packaging materials of the prior art, since the layer of the polyolefin with mineral filler itself is rather economical and leads only to a relatively small value, for example, compared with the packaging material containing aluminum is th foil or containing paper or cardboard layer of increased thickness.

The packaging laminated material according to the invention also has the advantage compared with packaging laminated materials of the prior art, consists in the fact that it can be easily converted into a dimensionally stable, impervious to liquid, disposable packing, with high rigidity when grasping and improved properties entrainment without the risk of cracking and other damage that can impair tightness, which may occur when forming the packages of some of the materials of the prior art, in particular the packaging laminated material containing sensitive to tensile aluminium foil or packaging laminated material comprising a layer of paper or paperboard increased thickness.

In addition, a layer of polyolefin with mineral filler has a certain moisture and ageing, in particular, oxygen and therefore makes packing laminirovannom material according to the invention increased moisture and ageing.

In accordance with another feature of the invention a disposable packaging described in the introduction of the type having a container with a tubular body, which is formed by molding by bending and welding the laminated packaging material according to the invention.

odnorazovaja packaging according to the invention has a surprisingly good rigidity when grasping and good properties entrainment, and this package is convenient to grab and lift with one hand, covering the tubular body of the container is practically without any excessive bending [indentation] the walls of the container and the resulting inadvertent spilling of the contents when it is emptying.

Conducted evaluation and comparative tests have shown that disposable package obtained by molding by bending and welding the laminated packaging material according to the invention, in its properties entrainment can be considered significantly superior compared with her disposable packaging made from packaging materials of the prior art, i.e. without a layer of a polyolefin with a mineral filler. The results are particularly striking because at least one of the tested comparative packaging was made from the packaging material, which had a higher bending stiffness (higher bending resistance) in comparison with the packaging material according to the invention and which consequently, as might be expected, was made to give comparative packaging relatively higher stiffness grasping and best properties entrainment.

Additional advantages, features and modifications such as packaging materials and disposable UPA is ovci according to the invention will be understood from the following detailed description with reference to the accompanying drawings, on which:

figure 1 - schematic view, in cross section, of the packaging laminated material according to the invention;

figure 2-4 - schematic kinds of disposable packings of a conventional type, while figure 2 shows the disposable packaging (Tetra Brik®, figure 3 shows a single-use packaging (Tetra Rex®and figure 4 shows a single-use packaging (Tetra Top®.

First, it should be noted that the present invention is naturally not limited to the options disposable packaging shown in the drawings, which are intended just to give some examples of disposable packaging in which the present invention can be applied. For the person skilled in the art it is obvious that you can perform many different variants and modifications as the packaging material of figure 1, and disposable packaging in Fig.2-4, without leaving the scope of the invention defined by the attached claims.

So figure 1 shows a simple, but practical embodiment of a laminated packaging material for disposable packaging with improved properties entrainment. The packaging material 10 has a relatively thick, but able to bend the Central layer 11 of paper or paperboard and a layer 12 of polyolefin with mineral filler, applied for improving the rigidity and in which the percentage mass fraction of mineral particles is from about 40 to about 70% of the total mass of the layer of polyolefin with mineral filler. To give the packaging material 10 to the desired or desirable moisture resistance, the packaging material 10 has an outer, waterproof coating 13 and 14 of polyolefin on both sides of the layer 11 of paper or cardboard.

The layer 12 of the polyolefin with the mineral filler can be obtained by using the extruding operation, during which the film of molten polyolefin mixed with it mineral particles ekstragiruyut on one side of the paper or cardboard tape, while the tape 15 appropriate adhesive or binder ekstragiruyut between the film of molten polyolefin with a mineral filler and a paper or cardboard and tape. Alternatively, the layer 12 of the polyolefin with the mineral filler can be obtained in the form of a film extrusion blown and can be attached by lamination or permanently glued to paper or cardboard strip with the corresponding layer 15 of laminating or adhesive by means of a simple operation lamination, a well-known specialist in this field. However, the layer 12 of the polyolefin with the mineral filler is preferably manufactured in the form of spilled film by means of extrusion operations, during which the film first ekstragiruyut on the cooled surface. After e is wow spilled film attached to the paper or cardboard tape through the operation of laminating known in itself.

The thickness of the layer 12 of the polyolefin with the mineral filler may vary depending on, among other things, on the size and configuration corresponding disposable packaging even though the layer of polyolefin with a mineral filler and a thickness of from about 30 to about 100 microns, usually gives the packaging material 10 of sufficient rigidity to receive the disposable package with the given improved properties capture.

Examples of applicable polyolefins for the formation of a layer 12 of polyolefin with mineral filler in accordance with the invention can be based on both the homopolymers and the copolymers of ethylene and propylene. An example of such homopolymers is polypropylene with a melt index according to ASTM less than 10 (2,16 kg; 230° (C), and examples of such copolymers of ethylene and propylene are copolymers of ethylene and propylene with a melt index ASTM comprising 0.5 to 5 (of 2.16 kg; 230°).

Mineral particles suitable for use in layer 12 of the polyolefin with the mineral filler may be any known in the field of mineral particles, but preferably they are mineral particles selected from the group, mainly containing dolomite, chalk, calcium, talc, mica, kaolin, clay and wollastonite (plate spar). In addition, PR is% mass fraction of mineral particles in the layer 12 of the polyolefin with the mineral filler may vary within wide limits, but usually it ranges from about 40 to about 70% of the total mass of the layer 12 of the polyolefin with mineral filler. If the percentage mass fraction of mineral particles will be below 40%, it will cause the layer 12 of the polyolefin with the mineral filler is too viscous, it will not give the desired rigidity of the packaging material 10, and if the percentage mass fraction of mineral particles will be above 70%, it will cause the layer 12 of the polyolefin with the mineral filler is too brittle, it will not allow you to mold it, bend without the risk of cracking. To give optimum rigidity and formability of the packaging material 10, the percentage mass fraction of mineral particles must be within a specified range from about 40 to about 70% of the total mass of the layer 12 of the polyolefin with mineral filler.

Suitable polyolefin for the two exterior waterproof coatings 13 and 14 is polyethylene, preferably low density polyethylene, which besides the fact that it has a high moisture resistance, also contributes to the formation of mechanically strong and water-proof, sealing the seams with a simple, but effective sealing during the conversion of the packaging material 10 in a dimensionally-stable disposable packaging, obladaushi the high rigidity with their mechanical capture and improved properties entrainment. The corresponding values of the thickness or amount of coverage, defined surface density of the coating, exterior, water-resistant polyolefin coatings 13 and 14 in accordance with the present invention can vary, but typically, the surface density of the coatings is in the range from about 10 to about 20 g/m2for one of the outer cover 13 and in the range of from about 20 to about 50 g/m2for the other outer coating 14.

From the packing material 10 shown in figure 1, in accordance with the invention produce a dimensionally-stable, water-resistant disposable packaging, some well-known examples of which are shown in figure 2-4.

Figure 2 presents a perspective view of industrial manufactured disposable packaging (Tetra Brik®. This disposable package 20 has a tubular body 21 with an essentially rectangular cross-section, containing four pairs of opposite side walls (of which only shows two adjacent side walls 22A and 22b), which are connected to each other along the vertical, bent or angular edges, such as shown angled edge 23 between two adjacent side walls 22A and 22b. In addition, the package 20 has an essentially flat upper and lower closing sections, forming one piece with the tubular body is m 21 (of which shows only the upper closing section 24), with four pairs of opposite triangular corner valve with double walls, such as shown angle valve 25 which are bent and permanently attached [welded or glued] to the adjacent flat surface of the wall from the outside of the package.

Disposable packaging (Tetra Brik®shown in figure 2, is formed from a tape laminated packaging material 10 due to the fact that both longitudinal edges of the ribbon are bent toward each other and attached to each other by longitudinal joints overlapped with the formation of the pipe. The tube is filled with the appropriate information, such as milk or juice, and divided into separate packaging units through repeated compression and heat sealing pipe in a direction transverse to the longitudinal direction of the pipe, while packaging units simultaneously separated from each other by using incisions in the transverse zones of welding with getting filled, cushion packaging. On subsequent operation of forming and welding pincushion packages give their final geometrical configuration, usually in the form of a parallelepiped, with four formed, in pairs opposite, triangular corner flap folded over and permanently attached to the adjacent flat surfaces of the walls from the outside unit is Cai.

Figure 3 shows a perspective view of industrial manufactured disposable packaging Tetra Rex®. This well-known disposable package 30 has a tubular body 31 is essentially square cross-section, containing four pairs of opposite side walls (of which only shows two adjacent side walls 32A and 32b), which are connected to each other along the vertical bent or angular edges, such as shown angled edge 33 between two adjacent side walls 32A and 32b. In addition, the package 30 has an essentially flat bottom closing station (not shown), forming a single unit with the tubular body 31, and the pliers upper closing section 34, forming a single unit with the tubular body 31.

Disposable packaging Tetra Rex®shown in figure 3, is formed from a tubular, flat folded blanks of packing from the packing material 10 shown in figure 1, due to the fact that the first workpiece packing raise before the formation of an open, tubular housing essentially square cross-section. One open end of the housing is closed by the operation of bending and welding, during which four solid, in pairs opposite end wall of the housing bend toward each other and welded to each other with the formation of the essentially flat bottom closing the th site. Closed so the case is filled with the appropriate information, such as milk or juice through the other open end of the casing, which is then closed by the additional operation of bending and welding, during which four solid, in pairs opposite end or top wall of the casing bent toward each other and welded to each other so as to obtain a package with a characteristic pliers upper closing section.

Figure 4 shows a perspective view of industrial manufactured disposable packaging Tetra Top®. This well-known disposable package 40 has a tubular body 41 is essentially round cross-section and substantially flat lower closing element (not shown)connected to the tubular body 41. Disposable packaging Tetra Top®differs from both the above-described disposable packings 20 and 30 mainly due to the fact that the tubular body 41, there are practically no vertical bent or angular edges, and the fact that it has a separate upper closing element in the form obtained by injection molding, the plastic cover 44 with a peripheral annular, downward directed flange, through which the plastic cover 44 still welded to the inner side of the cylindrical body 41 of the container.

Disposable packaging Tetra Top ®form, like the pay package of the Tetra Rex®from tubular, flat folded blanks of packing from the packing material 10 shown in figure 1, due to the fact that the first tubular billet packing raise for education open tubular housing essentially round cross-section. One open end of the housing is closed by operation of the pressure die casting, in which molten plastic is injected under pressure and formed into a round and essentially flat lid with an annular peripheral, downward directed flange, whereby obtained by molding the plastic cover still welded to the inner side of the housing container. Closed so the body of the container is filled with the appropriate information, such as milk, through the other open end of the container shell, which is then closed by the operation of bending and welding, during which four solid, in pairs opposite end or bottom wall of the casing of the container is bent towards each other and are welded to each other, and two triangular corner valve with double walls formed by the operation of flexion, bend and still attach [weld or stick] to the flat lower closing element from the outside is part of the package.

Disposable packages 20, 30 and 40 according to the invention are characterized as dimensional stability, and moisture resistance, and, in addition, their main advantage compared to conventional disposable packaging is that by simply wrapping a hand at least part of the tubular housing, indicated respectively 21, 31 and 41 can be lifted and emptied by pouring their contents, almost completely without the risk of spills due to excessive indentation inside wall of the captured packaging when it is emptying. Improved properties of disposable packaging according to the invention, shown in its capture, particularly preferred and desirable, for example, for disposable packaging Tetra Top®then there are packages that have a tubular body without longitudinal giving stiffness, angular or bent edges and for which issue, which sent the invention is particularly obvious and serious.

1. The laminated material (10) for the manufacture of packing containers by molding bending, heat sealing, containing a Central layer (11) of paper or paperboard and a layer (12) of the polyolefin with mineral filler on one side of the Central layer (11), characterized in that the layer (12) with mineral filler has a thickness of the t of about 30 to about 100 microns and contains mineral particles in an amount of from 40 to 70% of the total mass of the layer (12) with mineral filler.

2. The packaging laminated material (10) according to claim 1, characterized in that the layer (12) with mineral filler attached to the Central layer (11) with laminating layer (15) of the polyolefin.

3. The packaging laminated material (10) according to claim 1 or 2, characterized in that the layer (12) with a mineral filler based on a mixture based on propylene.

4. The packaging laminated material (10) according to any one of the preceding paragraphs, characterized in that it has an external coating (13 and 14) of the polyolefin on both sides of the Central layer (11).

5. The packaging laminated material (10) according to claim 5, characterized in that the two outer coating (13 and 14) consists of polyethylene.

6. The packaging container (20; 30, 40)having a tubular body (21; 31; 41), characterized in that at least part of the tubular body of the container is manufactured by forming the bending and TermoSanitari laminated packaging material (10) according to any preceding item.

7. The packaging container (20; 30; 40) according to claim 6, characterized in that the tubular body (21; 31; 41) of the container has at one end essentially flat end closing area, forming a single unit with the tubular body of the container.

8. The packaging container (40) according to claim 6 or 7, characterized in that the tubular body (41) on the other end is opened, obtained by casting d is the pressure, end closing element (44).



 

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The invention relates to the manufacture of two-layer Assembly consisting of an inner layer of BIOPLAST, which is a polymeric composition consisting of boron compounds such as boron nitride and polypropylene, and the outer layer of graficamente, which is a polymeric composition consisting of graphite and polypropylene, or from one of polypropylene

The invention relates to methods for polymer composite materials on the basis of polydimethylsiloxane rubber, not having in its composition of active groups, and can be used to produce films, thin-film and bulk products in mechanical engineering, electrical engineering, medical, food and other industries

The invention relates to a flexible, transparent films, in particular, for the manufacture of tanks for solution for intravenous infusion using F-F-S (forming - filling - sealing)

The invention relates to bilateral welded, suitable for printing and packaging, oriented multilayer polyolefin film containing at least one primary layer and bilateral weldable covering layers containing hydrocarbon resin

The invention relates to a multilayer composite material
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