RU151495U1 - PROCESSING FOR FLEXIBLE LAYERED PACKAGING MATERIAL FOR MANUFACTURE OF SECTIONAL PACKAGES - Google Patents

Abstract

A flexible laminated packaging material, which has the form of a web comprising at least a single external working layer of a metal foil or metallized polymer film, an intermediate adhesive-active layer and an internal working layer inert with respect to the products being packaged, characterized in that the canvas consists of at least two mirror-symmetric parts, each pair of which is intended for the manufacture of sectioned bags for packaging sets of heterogeneous dispersions products, and each part individually has alternating stripes that serve as the front and rear walls of the chambers for separate packaging of at least two heterogeneous dispersed products selected for the manufacture of the sets, the intermediate adhesive-active layer consisting of a copolymer of ethylene and methacrylic acid, and the inner layer consists of a copolymer of ethylene and acrylic acid.

Description

Technical field

A utility model relates to the design of blanks from a flexible at least three-layer packaging material for the manufacture of sectioned (i.e., multi-chamber) bags for packaging sets of at least two such heterogeneous dispersed products, at least one of which is a flowing material.

Hereinafter, the term "flowing material" means:

firstly, liquid foods such as milk, milkshakes, fruit and vegetable juices, etc. and viscous food colloids such as sugar syrup, condensed milk, etc., which can be put on the market in kits with such bulk products as granulated or powdered instant coffee, corn flakes, popcorn, small dried fruits, etc .;

secondly, such non-food materials as viscous epoxy or other thermosetting resins, viscous film-forming for paints, flowing organic solvents of varnishes, etc., which can be put on the market in small portions in sets with hardeners (and, if necessary, with dispersed fillers) for resins, dry pigments (and, if necessary, with desiccants) for paints, with dry bases for varnishes, etc.

State of the art

There are many dissimilar dispersed products that are intended to be used together, but must be mixed immediately before use. Such products, given their mix ratios, are separately packaged and packaged and marketed as kits.

Typical examples are many bulk and liquid (mainly finishing) building materials such as chalk or other dry pigments, liquid diluents such as water-polymer emulsions, drying oils or other film-forming materials, etc. Portions of such materials are measured in at least kilograms. Therefore, they are packaged in a piece (often recycled) metal, glass or polymer containers in the form of cans, bottles, bags, etc., before transportation and possible long-term storage, the use of which virtually eliminates difficulties in dosing and packaging.

However, many ingredients of future mixtures have to be delivered to the market in small portions weighing from several grams to several tens of grams. Naturally, such products are packaged in disposable sectioned (i.e. multi-chamber) bags, which are formed from flexible layered packaging materials.

High-performance machines for such packaging, manufactured, for example, by the Italian company Boato International, are now widely available on the market. These machines make it possible to form “sleeves” of flexible layered packaging materials that are connected by longitudinal welds, which, as they are synchronously filled with dispersed products, are divided into chambers by transverse welds.

In particular, from advertising sources, sets of dry dispersed ingredients for seven-component mixtures formed on such machines that are delivered simultaneously in seven-chamber packages are known.

However, when dispensing and packaging dispersed products, at least one of which is a fluid material, it is not always possible to completely displace it from the transverse joints between successive chambers. The resulting defects in the welds force unnecessarily spend time on the rejection of damaged packages and lead to loss of products.

Therefore, only two-chamber small-sized packages (in English - sachet) are still mass produced. For example, the Polish company Mokate (http://www.mokate.com.pl) produces in such packages combinations of instant coffee with viscous caramel or milk foam, crispy balls with yogurt, which is flavored with strawberries or tropical fruits, etc.

To increase the tightness of packages of this type, many flexible layered packaging materials have been proposed. Of these, the flexible layered packaging material according to US 6063462, intended for the manufacture of especially durable food packaging, is closest to the material proposed by technical nature. This material has, as a rule, at least three layers, namely:

the first is the outer layer of the finished package — a sealing layer that consists of at least 50% durable high-density polyethylene synthesized using a metallocene catalyst and, in particular, cross-linked using β-radiation, with the addition of other carbochain polymers and copolymers ;

the second is intermediate and thicker and relatively fusible in comparison with the first is a layer consisting of a copolymer comprising at least one oxygen-containing monomer and ethylene, and

the third is the inner part of the finished package - a layer of arbitrary thermoplastic inert with respect to the packaged product.

This material may take the form of a web consisting of two identical mirror-symmetric parts, each of which includes at least two strips for forming chambers for storing portions included in the set of dispersed products, both strips being made in one piece and therefore in the initial state have three specified layer.

The described material is intended primarily to ensure the gas tightness of the bags. For this purpose, it is planned to manufacture an external sealing layer of high density polyethylene with the aforementioned additives and crosslinking of the polyolefins with β-radiation. This significantly lengthens (and increases the cost of) the technological cycle of production of flexible layered packaging material, which is unacceptable when used for mass packaging of sets of dispersed products. Moreover, if at least one of the packaged products is a flowable material, defects (and, consequently, irreparable defects) can occur during the closure of chambers filled with fluid materials in the process of resistance welding of transverse welds.

Summary of utility model essence

The utility model is based on the task of changing the composition and relative position of the parts to create such a blank of flexible layered packaging material for the manufacture of sectioned bags, the use of which will significantly simplify and reduce the cost of manufacturing packaging material and reduce the likelihood of defects in transverse welds when closing chambers filled with fluids.

The problem is solved in that in the workpiece of a flexible layered packaging material for the manufacture of sectioned bags for packaging sets of dissimilar dispersed products, which has the form of a web consisting of two identical mirror-symmetric parts, each of which has at least two stripes for forming chambers for storage of portions included in the set of dispersed products, and both strips in the initial state have at least one common for them - external in the working position - strong seal the coating layer and the intermediate adhesive layer made of ethylene-oxygen-containing monomer copolymer and the polymer layer inert with respect to the packaged products and coextruded on it, according to the inventive concept, the strong sealing layer consists of a metal foil or a metallized polymer film, the adhesive layer consists of a copolymer of ethylene acid and a copolymer and the layer inert with respect to the packaged products consists of a copolymer of ethylene and acrylic acid.

Such a structure is much simpler and cheaper to manufacture and practically reduces the probability of occurrence of transverse weld joints defects when the chambers are closed.

Brief Description of the Drawings

Further, the essence of the utility model is illustrated by a detailed description of its design, an indication of the method of its manufacture and means of packaging with reference to the drawing, where, in a reduced scale, a basic fragment of an improved blank for manufacturing sectioned bags is shown in axonometric projection.

The best options for translating a utility model

The proposed blank from a flexible layered packaging material for the manufacture of sectioned bags regardless of the specific form of the invention (see drawing) has a web 1 consisting of two identical mirror-symmetric parts 2 and 3, the border between which is conventionally shown by a solid black line.

Parts 2 and 3 of the web 1 has alternating strips 4 and 5, which serve as the front and rear walls of the chambers for separate packaging of at least two heterogeneous dispersed products selected for the manufacture of sets. The boundaries between strips 4 and 5 are conventionally indicated by dashed lines that indicate the plane of symmetry of future longitudinal welds.

One skilled in the art will recognize that two bands 4 and 5, suitable for forming only two-chamber bags, are shown here for the sake of simplicity and that the number of bands of the same type can be substantially greater than two depending on the number of ingredients in specific sets of dissimilar dispersed products.

Both bands 2 and 3 have the same layered structure, which includes:

at least a single strong sealing layer 6 of metal foil or metallized polymer (in particular polyethylene terephthalate) film, which in the working position serves as the front and back sides of the formed packages and a carrier of information about the products packaged in the cameras, the manufacturer, etc. either directly or in combination with an additional cover information layer not shown here;

an adhesive layer 7, which consists of a copolymer of ethylene and methacrylic acid, available on the market under the trademark Nucrel® 3990 (http://nucrel.dupont.com), and

inert with respect to any packaged product, layer 8, which consists of a thermoplastic resistant to fluids, namely a copolymer of ethylene and acrylic acid, available on the market under the trademarks of Surlyn 1702 (manufacturer DuPont, website http://www.dupont .com / industrial-polymers / surlyn), Affinity ™ (manufacturer Dow Chemical, website http://www.dow.com) and Exact ™ (manufacturer ExxonMobil, sites http://www.dexplastomers.com or http: // www.exxonmobilchemical.com).

The thickness of the durable sealing layer 6, it is advisable to set in the range from 6.35 to 8 microns. In practice, it is advisable to apply an extrusion layer of polyethylene terephthalate 10-12 microns thick (which in some cases is connected to layer 8 with an intermediate substrate of pure polyethylene terephthalate 12-15 microns thick).

In principle, a film of the same polymer with an oxidized coating of SiO _x or AlO _x can serve as an equivalent in terms of strength metallized polyethylene terephthalate film. The thickness of the adhesive layer 7 and layer 8, it is advisable to set in the range from 7 to 12 microns.

The adhesive layer 7 and the fluid resistant layer 8 are applied to the strong sealing layer 6 by coextrusion.

The described preform is used in the packaging processes of sets of dissimilar dispersed products, at least one of which is a flowing material, on the already mentioned machines of the company Boato International.

Industrial applicability

The utility model can be implemented on existing extruders equipped with heads for coextrusion of at least two melts of various thermoplastic polymers. The resulting blanks can be widely used in the manufacture of multi-chamber bags for packaging dissimilar food and non-food dispersed products of arbitrary consistency.

Claims (1)

A flexible laminated packaging material, which has the form of a web comprising at least a single external working layer of a metal foil or metallized polymer film, an intermediate adhesive-active layer and an internal working layer inert with respect to the products being packaged, characterized in that the canvas consists of at least two mirror-symmetric parts, each pair of which is intended for the manufacture of sectioned bags for packaging sets of heterogeneous dispersions products, and each part individually has alternating stripes that serve as the front and rear walls of the chambers for separate packaging of at least two heterogeneous dispersed products selected for the manufacture of the sets, the intermediate adhesive-active layer consisting of a copolymer of ethylene and methacrylic acid, and the inner layer consists of a copolymer of ethylene and acrylic acid.

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