RU234092U1 - Heat resistant bag - Google Patents

Abstract

The utility model relates to packaging equipment, namely to products intended for storing and transporting food products, including hot and cold products. The utility model can be used both in everyday life and in the catering industry, for example, in restaurants, cafes, canteens or for food delivery. The heat-resistant package is made of a front wall 3, a back wall 4 and a bottom 5, which form a triangular shape and are made three-layer, the inner layer 10 is made of heat-resistant aluminum foil, the middle layer 9 is made of high-quality non-woven material, the outer layer 8 is made of waterproof printed film, an adhesive valve 2 is attached to the upper part with a welded seam, above which handles 1 are located, attached to the front 3 and back 4 walls in their upper parts. The utility model is implemented in a device, which is primarily durable and modern, relatively inexpensive materials used in the manufacture of a heat-resistant package, a modern method of fastening them, as a result of which a heat-resistant package is formed, capable of both accumulating heat from a hot product and accumulating cold emanating from a frozen or cold product. 4 cl., 7 ill.

Description

The utility model relates to packaging equipment, namely to products intended for storing and transporting food products, including hot and cold products. The utility model can be used both in everyday life and in the catering industry, for example, in restaurants, cafes, canteens or when delivering food. Such a package can be used several times, its approximate dimensions are from 10/10/10 to 50/50/30 cm.

There are various types of bags made of different materials (polyethylene, paper, cardboard, etc.). However, such bags do not have sufficient heat resistance for use with hot products and thermal insulation to keep cold, which limits their use. Multilayer bags are also known, but they often do not provide ease of use (for example, there are no handles or reliable valves for sealing).

The most common example is a regular multi-layer bag used to store food, but does not have heat resistance, reinforced seams, magnetic or locking valve closures, or other functional elements, using modern materials and means of implementation.

Known is the patent document of the Russian Federation 69027, published on 10.12.2007, which discloses a universal package for individual carrying of contents, comprising a bottom and side walls and formed from a single sheet blank, including projections extending along at least two edges of this sheet blank, and slots into which said projections are inserted. The sheet blank is made of a flexible and elastic material, and the projections have such a shape that their greatest width exceeds the length of said slot. This solution actually implements the assembly of the package at the place of manufacture of its blank, and in this case additional fold lines can be made in the blank for its folding like a regular package, however, this solution does not fix the package at the place of its closure and it cannot maintain the temperature of the product for a long time.

A close solution is the patent document of the Russian Federation 88343, published 10.11.2009, the proposed device implements high operational characteristics of the proposed heat-resistant package, which are provided by its ability to maintain the initial temperature of the packaged product for a certain time, due to the fact that, in the heat-resistant package, a polyethylene package with a ZIP-LOCK type lock for packaging food products is used as a heat-sealed shell, the main panels are made of heat-resistant material, glued together on the sides and glued with the upper part to the upper edge of the polyethylene package with tape with an adhesive layer. However, such a solution is inconvenient in the process of carrying it and the materials from which it is made do not allow keeping products at the required temperature for a long time.

An analogue of the solution is a thermal package according to the patent document of the Russian Federation 228420, published on 28.08.2024, the proposed device relates to plastic thermal insulating containers, namely to multilayer sealable packages providing thermal insulation during transportation or short-term storage of chilled products. The thermal package contains a body made of a multilayer web, made with the formation of a bottom fold, two walls, the side edges of which are fastened by welding, and a neck equipped with a plastic latch handle with two flaps, while the multilayer web of the package contains outer and inner layers of polyethylene film and two middle layers, one of which is made of a sheet of foamed polyethylene, and the flaps of the plastic latch handle are soldered to the walls of the package from its inner side along the entire length of the neck and are made with the possibility of sealing the neck when latched, while the second middle layer is made of polyethylene film with a gel filler. This solution is very difficult to implement, such a package requires expensive equipment and materials, and such materials as gel filler, plastic, polyethylene are used, due to such materials the package itself becomes heavy.

In this area, it is obvious that the main disadvantage of the known packages is the inconvenience of using the packaging in the retail trade of hot or chilled food products for thermal insulation of the contents during its short-term transportation by the buyer, while all solutions cannot implement how convenient it is to carry the package itself in a folded state, the convenience of its closing, a reliable, convenient and modern solution is necessary in this area of technology.

The objective of the utility model is to create a universal heat-resistant package that provides both heat and cold maintenance, while its production does not require complex equipment and, accordingly, the cost of such a package is significantly lower.

The technical result is the implementation of a lightweight and at the same time durable heat-resistant universal package capable of keeping products warm or cool for a long time, depending on the need.

This technical result is ensured primarily by durable and modern, relatively inexpensive materials used in the manufacture of heat-resistant bags, a modern method of fastening them, as a result of which a heat-resistant bag is formed, capable of both accumulating heat from a hot product and accumulating cold emanating from a frozen or cold product.

The technical result is achieved by a heat-resistant package, which is made of a front wall 3, a back wall 4 and a bottom 5, which form a triangular shape and are made in three layers, the inner layer 10 is made of heat-resistant aluminum foil (food aluminum layer), the middle layer 9 is made of high-quality non-woven material (spunbond or another material similar in characteristics - analogue), the outer layer 8 is made of waterproof printed film (biaxially oriented polypropylene film (BOPP) or a similar material, similar in characteristics - analogue), in the upper part an adhesive valve 2 is attached with a welded seam, above which handles 1 are located, attached to the front 3 and back 4 walls in their upper parts.

Heat-resistant bag, which uses spunbond as a non-woven material.

Heat-resistant bag, which uses biaxially oriented polypropylene film as the printed film.

A heat-resistant bag with handles made of textile material.

A heat-resistant bag with handles sewn to the walls with thread.

Fig. 1-7 shows the heat-resistant package open and clearly shows how the device is made, implemented and operates.

Fig. 1 - general view of the heat-resistant package in a closed state;

Fig. 2 - general view of the heat-resistant package in the open state;

Fig. 3 - heat-resistant package, where the adhesive layer 6 and the welded layer 7 are clearly shown;

Fig. 4 - side view of a heat-resistant package with layers indicated;

Fig. 5 - general view of the heat-resistant package from the side;

Fig. 6 - shows the implementation of the use of a heat-resistant package with a hot (warm) product;

Fig. 7 - shows the implementation of the use of a heat-resistant package with a cold (frozen) product.

List of positions in Fig. 1-7 (decoding):

1 - handles;

2 - adhesive valve;

3 - front wall;

4 - rear wall;

5 - bottom;

6 - adhesive layer;

7 - weld seam;

8 - outer layer of material (printed film);

9 - middle layer of material (non-woven material);

10 - inner layer of material (aluminum foil).

The heat-resistant bag is made of a front wall 3, a back wall 4, a bottom 5 and an adhesive flap 2 located at the top, which is attached at the top with a welded seam, respectively, handles 1 for carrying the bag are attached to the top. Accordingly, the front wall 3, the back wall 4 and the bottom 5 form a kind of triangular body of the bag and have a multilayer structure, which is made as follows, namely from three layers:

The inner layer 10 is made of heat-resistant aluminum foil, which provides protection against high temperatures and prevents heat from penetrating outside or coolness from escaping outside. In addition, this layer also prevents moisture from penetrating inside the bag.

The middle layer 9 is made of high-quality non-woven material, which provides additional strength and thermal insulation. The non-woven material also helps maintain the shape of the bag when filled.

The outer layer 8 is made of waterproof printed film, which protects the package from external influences such as moisture, dirt or mechanical damage. This outer layer 8 can be printed with images, inscriptions and drawings or painted in the desired color or colors.

The manufacturing method consists of three main stages:

Stage 1: three layers are glued together using glue (for example, by laminating) and three separate parts of the device are obtained, namely: two walls (front wall 3, back wall 4) and bottom 5;

Stage 2: when the three layers form a kind of sandwich material (three parts obtained in stage 1), then a single device is assembled - a heat-resistant package using heat welding (welded seam);

Stage 3: handles and adhesive valve are separately attached, which allow achieving the required implementation of a single device - a heat-resistant bag. Most often, they are attached with a welded seam, but can also be additionally sewn.

Accordingly, handles 1 are located above the bag and allow it to be carried comfortably. The adhesive valve 2 is located in the upper part of the bag and serves to seal the contents of the heat-resistant bag, which is capable of both accumulating heat from the product (heated and hot food, a hot drink such as tea or coffee, etc.) located in it, and retaining coolness from the contents of the product inside itself (frozen food, a chilled soft drink, ice cream, cold berries, cakes, etc.).

The upper part of the bag has handles 1, which are welded to the front 3 and back 4 walls of the bag for easy carrying. Handles 1 are made of durable textile material that can withstand significant loads. The seams of the handles can be reinforced with additional stitching with nylon thread, which increases their durability and reliability.

Welded seams 7 are a reliable modern connection of parts in the design of the device - a heat-resistant package, which is formed from the front wall 3, the back wall 4 and the bottom 5 due to the welded seam 7. When attaching the handles, a welded seam is also used, but in the versions of the heat-resistant package, additional materials can be used, for example, the handles are stitched to the walls 3 and 4 with a thread (for example, nylon or other high-quality thread-analog), which provides increased strength, respectively, this makes the package more resistant to ruptures and deformation at the points of attachment of the handles. In some versions of the package, the seams are made by double stitching, which additionally strengthens the design of the package. Handles can be made of polyethylene, paper, cardboard, various films made of textile material.

The weld seam itself in the heat-resistant package is obtained using a pulse welding device. The welding element for forming this seam is a nichrome tape 0.1-0.2 mm thick and 1 to 10 mm wide. The layers and parts of the package are heated by the tape and welded. One flat seam is formed.

The flat seam 7 obtained in this way ensures tightness and allows subsequent visual quality control of seam 7. This method is used in the manufacture of the proposed heat-resistant package, i.e. most of its entire structure.

The size of the package can be adapted to the needs of the consumer. The package has the ability to fold before use and stretch slightly depending on the volume of the contents during its actual use. This is achieved due to the flexibility of the materials used and the special design of the seams 7. Due to the multi-layer structure, including heat-resistant aluminum foil 10 and high-quality non-woven material 9, together with the outer layer 8, the package perfectly retains both cold and heat, depending on whether a hot (warm) product is placed in a heat-resistant package or a frozen (cold, cool) product will be in it. The thermal insulation properties of the materials allow maintaining a low temperature inside the package, which is especially important when transporting chilled products such as frozen foods, ice cream or drinks with ice.

When testing the strength of the proposed device, the tensile strength of the welded seams of the heat-resistant package was found to be higher than 0.7 tensile strength of the film, which complies with GOST 12302-2013.

The hermetic adhesive valve reliably prevents the cold or warm air from escaping from the product inside the heat-resistant bag, which prolongs the time it remains cold or warm.

Claims (5)

1. A heat-resistant bag, characterized in that it is made of a front wall (3), a back wall (4) and a bottom (5), which form a triangular shape and are made in three layers, the inner layer (10) is made of heat-resistant aluminum foil, the middle layer (9) is made of non-woven material, the outer layer (8) is made of waterproof printed film, an adhesive valve (2) is attached to the upper part with a welded seam, above which there are handles (1), attached to the front (3) and back (4) walls in their upper parts. 2. A heat-resistant bag according to item 1, characterized in that spunbond is used as the non-woven material. 3. A heat-resistant package according to item 1, characterized in that a biaxially oriented polypropylene film is used as the printed film. 4. A heat-resistant bag according to item 1, characterized in that the handles are made of textile material. 5. A heat-resistant bag according to item 1, characterized in that the handles are sewn to the front wall and to the back wall with thread.