RU89929U1 - ECONOMIC BAG - Google Patents

Abstract

1. A bag, characterized in that it contains walls interconnected by at least one connecting weld, as well as carrying elements connected to the upper parts of the walls, each wall being made at least in the upper part of several layers of polymer material and the end parts of the carrying elements are placed between the layers of polymer material of the walls made in the upper part with reinforcement in the form of several parallel welds that intersect the end parts of the carrying element and connecting them with wall layers, as well as wall layers between each other. ! 2. The bag according to claim 1, characterized in that the upper part contains at least three, preferably from five to thirty parallel welds. ! 3. Bag according to claim 1, characterized in that the parallel welds are placed in increments of 2 ÷ 15 mm, preferably 7 mm. ! 4. The bag according to claim 1, characterized in that the parallel welds are made by heat welding with the formation of shrinkage of the upper part relative to the initial width of the walls of the bag. ! 5. The bag according to claim 1, characterized in that the upper part of the walls is assembled or corrugated along the entire length of the parallel welds due to the shrinkage of the polymer material during welding and the formation between the seams of undulating corrugations located perpendicular or at small angles to the seams. ! 6. Bag package according to claim 1, characterized in that at least one parallel weld of the reinforced upper part of the wall is made to intersect at least one connecting seam of the walls. ! 7. Bag according to claim 1, characterized in that the parallel welds are made over the entire width of the upper part of the bag. ! 8. Bag according to claim 1,

Description

This device relates to means of transportation, including by carrying items, namely, shopping bags and packages.

A bag of flexible polymeric material is known from the prior art, comprising side walls interconnected by welds to form a cavity, characterized in that, in order to maintain the quality of the packaged product under long-term storage conditions, tubular elements are installed on the wall of the bag from its inside made of a gas-permeable synthetic material, while the tubular elements with their middle part are placed in the cavity of the package, and their ends are brought out (see RU 2017668 C1, B65D 30/00, 08/15/1994).

Also known from the prior art is a bag made of a polymer film obtained from a two-component polymer mixture of increased strength and having low deformation (WO 2005028551 A3, B65D 33/28, 03/31/2005)

Also known from the prior art is a shopping bag made of polymeric materials in the form of a case with a molded bottom and a handle formed by an opening in the case - (UA 8109U, А45С 3/04, 07/15/2005)

Also known from the prior art is a household bag (bag) made of polymeric materials in the form of a body with a molded bottom and a handle, the bag additionally containing a bottle holder in the form of a tape that passes through the holes in the bag body. Material for the manufacture of bags, in particular, can serve as high-pressure polyethylene. A decorative ribbon can be made of any flexible material. (RU 76199 U1, А45С 7/00, 09/20/2008)

The problem to which the claimed technical solution is directed is to manufacture a bag-bag with increased strength characteristics compared to ordinary bags made of polymeric materials at low cost.

This problem is solved due to the fact that the bag contains walls interconnected by at least one connecting weld, as well as carrying elements connected to the upper parts of the walls, each wall being made at least in the upper part of several layers polymer material and the end parts of the carrying elements are placed between the layers of polymer material of the walls made in the upper part with reinforcement in the form of several parallel welds intersecting the end parts of the carrying element and connecting their constituent layers wall, and wall layers together.

The upper part may contain at least three, and preferably from five to thirty parallel welds.

Parallel welds can be placed in increments of 2–15 mm, preferably 7 mm.

Parallel welds can be made by heat welding with the formation of shrinkage of the upper part relative to the initial width of the walls of the bag.

The upper part of the walls can be made assembled or corrugated along the entire length of the parallel welds due to the shrinkage of the polymer material during welding and the formation between the seams of undulating corrugations located perpendicular or at small angles to the seams.

At least one parallel weld of the reinforced upper part of the wall is made intersecting at least one connecting seam of the walls.

Parallel welds can be made over the entire width of the top of the bag.

The bag can be made rectangular and contain two two-layer walls connected by welds, preferably double on two sides of its perimeter, and also equipped with carrying elements in the form of two flat multi-layer handles.

The bag can be made rectangular and contains two two-layer walls connected by welds, preferably double on three sides of its perimeter, and is also equipped with carrying elements in the form of two flat multi-layer handles.

The walls are interconnected by at least one double weld to form at least one cavity for carrying objects.

Between the adjacent layers of each wall, at least one sealed cavity is formed.

Carrying elements and / or walls can be made, preferably, from recyclable materials.

Or carrying elements and / or walls can be made, preferably, of high pressure polyethylene.

Carrying elements can be made, preferably, in the form of flat multilayer handles.

Layers of multilayer handles can be welded or welded together by longitudinal and / or transverse seams.

The distance between the centers of fixation of the end parts of each carrying element can be from 100 ÷ 190 mm.

The bag can be equipped with two pairs of carrying elements, the length of one pair being made exceeding the length of the other pair and one element of the indicated pairs is fixed on each wall.

The walls can be made of a polymer extruded sleeve folded in the longitudinal direction, with the formation of a two-layer fabric, which is successively folded twice across its length and welded with welds on two sides.

The walls can be made of a polymer extruded sleeve folded in the longitudinal direction, with the formation of a two-layer fabric, which is successively folded twice across its length and welded in the middle at the bend and on two sides.

Carrying elements can be made of a two-layer web with a thickness of one layer 30 ÷ 55 μm, a width of 300 ÷ 900 mm, folded several times, preferably four to eight times, and welded by heating plates, with the formation of a strip 30 to 60 mm wide with a thickness of 120 ÷ 330 microns.

The thickness of one layer of the wall of the bag can be 25-60 microns.

Reinforcement in the upper part of the walls can be performed on not less than 5% of the length of the product in the upper part and not more than 50% of the length of the product.

The technical result provided by the given set of features is to increase the wear resistance and strength characteristics of the bag due to the implementation of the walls of a multilayer polymer material with reinforcement in the upper part and the placement of the end parts of the carrying elements between the layers of the polymer material of the walls and their connection with the layers of the walls of several parallel welded seams that also connect the wall layers to each other in the upper part, which makes it possible to transport the host natural goods and cargo weighing up to 30 kg, in addition, the multilayer material provides increased strength and tightness of the walls of the bag itself, increased their resistance to deformation.

The reinforcement of the walls of the bag increases the strength characteristics of the product in the upper part and increases the ability of the material to resist the formation of deformation. As practice shows, the largest number of ruptures of bags made of polymeric materials occurs due to tearing out of carry elements - handles, usually attached by welding on a relatively small area in the upper part of the walls. Thus, the placement of the carrying elements between the layers of the material of the walls and their attachment simultaneously with the reinforcement of the upper part, distributing the load from the elements of the transfers on a large (compared to the usual specified mounting) area avoids wall breaks at the points of attachment of the ends of the elements of the transfers, and this part of the layers of material between them ensures their joint work.

The tightness of the bag is ensured by the formation of closed cavities between the layers of the walls, preventing the leakage / leakage of liquid from or into the cavity of the bag in which the cargo or household goods are placed when one of the layers is torn.

The essence of the claimed utility model is illustrated by the following materials, which do not cover and, moreover, do not limit the entire scope of the claims of this technical solution.

Example 1

The bag contains walls interconnected by two connecting welds, as well as carrying elements connected to the upper parts of the walls, each wall made of several layers of polymer material, and the end parts of the carrying elements are placed between the layers of polymer material of the walls made each in this parts with reinforcement in the form of several parallel welds intersecting the end parts of the carrying element and connecting them to the wall layers, as well as the wall layers to each other.

The upper part contains nine parallel welds placed in increments of 7 mm.

In this case, parallel welds are made by heat welding with the formation of shrinkage of the upper part relative to the initial width of the walls of the bag. The shrinkage of the material forms pre-assembly along the entire length of the parallel welds or forms wavy corrugations located perpendicularly or at small angles to the seams.

The walls are interconnected by at least one double weld to form at least one cavity for carrying objects, and between the adjacent layers of each wall there is one sealed cavity not intended for carrying objects, but ensuring the tightness of the bag.

Moreover, all parallel welds of the reinforced upper part of the wall are made intersecting the double connecting seam of the walls. Parallel welds are made over the entire width of the upper part of the bag.

The bag is made rectangular and contains two two-layer walls connected by welds, preferably double on both sides of its perimeter, and is also equipped with carrying elements in the form of two flat multi-layer handles.

The bag can be made rectangular and contain two two-layer walls connected by welds, preferably double along the two sides of its perimeter, and also equipped with carrying elements in the form of two flat multilayer handles.

Carrying elements are made in the form of flat multilayer handles, and the layers of multilayer handles are welded together by longitudinal and transverse seams.

The distance between the centers of fixation of the end parts of each carrying element is from 100 ÷ 190 mm, preferably 140 mm

The bag can be equipped with two pairs of carrying elements, the length of one pair being made exceeding the length of the other pair and one element of the indicated pairs is fixed on each wall.

The carrying elements and / or walls of the bag are preferably made from recycled materials in the form of a high-pressure polyethylene film (LDPE) - raglanulate, a superconcentrate traditional for the production of bag films.

The manufacturing process consists of the following operations:

The secondary film is sorted, cut and sent to an agglomerator, in which the process of grinding, heating, brewing and dyeing the polymer mass in any preferred color, for example, gray, takes place. As a result of this operation, an agglomerate is obtained, i.e. pressed polyethylene fractions of no more than 5-6 mm. The resulting agglomerate enters the extrusion-granulation line.

An extrusion process takes place on the extrusion-granulator line, i.e. heating, melting, stirring, filtering and extruding the polymer mass through the holes, as a result of which strands of "thread" are made of polyethylene, with a diameter of 2 to 3 mm. The strands are subjected to forced cooling in a bath of water, crushed using a strand granulator, whereby gray granules are obtained.

The granules enter the extrusion plant, where the extrusion process takes place, followed by blowing of the polyethylene sleeve. The sleeve is folded into a web and wound onto a spool with a diameter of 76 mm. Thus, a double-walled polyethylene film is obtained with a single layer thickness of 35 μm and a width of 1000 mm, which is used to make the bag. The finished roll of a two-layer web enters the bag welding machine.

For loop handles on an extrusion plant, a two-layer web is made with a single layer thickness of 40 microns and a width of 370 mm. The canvas is folded three times, and welded with heating plates. A web is obtained with welded strips having six layers of film. The width of the strips is 5 cm, the thickness is 270-300 microns. The thickness of the strips depends not only on the thickness of the layers, but also on the welding method, since when using thermal welding, the material shrinks and pinches, forming corrugations, which increases the ability of the material to resist destruction and at the same time increases the thickness of the carrying element.

The finished roll of a two-layer web, as already mentioned, arrives at the bag welding machine, where the package is formed. The machine performs the following operations:

one). Unwinds and stretches a folded sleeve film;

2). Cuts the sleeve film on both sides to the weld points;

3) Inserts between the layers of the film and welds the cut tapes of the carrying elements 370 mm long forming the welded carrying elements - handles on both sides of the prepared, cut material, the distance between the centers of fixation is 140 mm.

4) Strengthens the welded carrying elements - handles on both sides in the form of parallel welds of 9 pcs. on each side of the material.

5) Folds in half the prepared material in the form of folded film webs with inserted and welded carrying elements - handles and with reinforcement of the welded handles in the form of parallel welded seams (9 pcs. On each side).

6). Performs side welds in the finished product - a bag in the form of two parallel welds without reinforcing the package in the form of a bottom weld.

Thus, a finished gray bag made of polyethylene is obtained, having the following dimensions: height 470 mm, width 450 mm, the main difference of which is increased wear resistance and strength characteristics of the bag, which allows it to be used for transportation and suspension of household goods and goods weighing up to 30 kg.

Example 2

The bag contains walls interconnected by one connecting weld seam located at the bottom of the bag, as well as carrying elements connected to the upper parts of the walls. Each wall is made of several layers of polymer material, and the end parts of the carrying elements are placed between the layers of polymer material of the walls, each made in this part with reinforcement in the form of several parallel welds that intersect the end parts of the carrying element and connect them to the wall layers, and wall layers between each other.

For the production of bags used high-pressure polyethylene film made of polyethylene, mainly of Russian origin, 40 cm wide and 30 microns microns thick.

The production is based on the extrusion method - forcing the molten polymer material through an extrusion head with subsequent blowing of the sleeve, cooling and winding the finished film into a roll.

Granular polymer raw materials are loaded into the hopper of the extruder for the film, through which it enters the rotating screw, where it melts as it moves under the action of heaters and pressure created by the screw itself.

The polymer melt is forced through a filter into an extrusion die.

The melt emerging from the head is inflated into the sleeve film due to the pressure of the air inside the sleeve.

The film sleeve is cooled by blowing on its outer surface. From the exhaust device through the system of shafts, the film enters the winder in rolls.

For loop handles on an extrusion plant, a two-layer web is made with a single layer thickness of 50 μm and a width of 400 mm. The canvas is folded twice, and welded with heating plates. A web is obtained with welded strips having four layers of film. The width of the strips is 50 mm, the thickness is 200-230 microns. The thickness of the strips depends not only on the thickness of the layers, but also on the welding method, since when using thermal welding, the material shrinks and pinches, forming corrugations, which increases the ability of the material to resist destruction and at the same time increases the thickness of the carrying element.

The same sleeve is stretched and blown into a film sleeve manufactured by the method described above, the resulting finished two-layer material is wound into a roll and sent to a bag welding machine, where the bag is formed. The machine performs the following operations:

one). Unwinds and stretches a folded double sleeve film;

2). Cuts the sleeve film on both sides to the weld points;

3) Inserts between the layers of the film and welds the cut tapes of the carrying elements 400 mm long, forming the welded carrying elements - handles on one side of the prepared, cut material, the distance between the centers of fixation is 120 mm.

4) Strengthens the welded carrying elements - handles on both sides in the form of parallel welds of 7 pcs.

6). Performs a bottom weld in the finished product - a bag in the form of a single weld.

Thus, a ready-made black bag made of polyethylene is obtained, having the following dimensions: height 420 mm, width 400 mm, the main difference of which is the increased durability and strength characteristics of the bag, which allows it to be used for transportation and suspension of household goods and goods weighing up to 30 kg.

Example 3

The bag contains walls interconnected by three connecting welds, preferably triple on the sides and a double bottom seam, as well as carrying elements connected to the upper parts of the walls. Each wall is made in the upper part of two layers of polymer material and the end parts of the carrying elements are placed between the layers of polymer material of the walls. In the upper part of the wall are made with reinforcement in the form of several parallel welds that intersect the end parts of the carrying element and connect them to the wall layers, as well as the wall layers to each other. Reinforcement in the upper part of the walls is made over the entire width of the product and 20% of the length of the product.

The bag can be made in any color scheme, but dark colors are preferred.

Claims (22)

1. A bag, characterized in that it contains walls interconnected by at least one connecting weld, as well as carrying elements connected to the upper parts of the walls, each wall being made at least in the upper part of several layers of polymer material and the end parts of the carrying elements are placed between the layers of polymer material of the walls made in the upper part with reinforcement in the form of several parallel welds that intersect the end parts of the carrying element and connecting them with wall layers, as well as wall layers between each other. 2. The bag according to claim 1, characterized in that the upper part contains at least three, preferably from five to thirty parallel welds. 3. Bag according to claim 1, characterized in that the parallel welds are placed in increments of 2 ÷ 15 mm, preferably 7 mm. 4. The bag according to claim 1, characterized in that the parallel welds are made by heat welding with the formation of shrinkage of the upper part relative to the initial width of the walls of the bag. 5. The bag according to claim 1, characterized in that the upper part of the walls is assembled or corrugated along the entire length of the parallel welds due to the shrinkage of the polymer material during welding and the formation between the seams of undulating corrugations located perpendicular or at small angles to the seams. 6. Bag package according to claim 1, characterized in that at least one parallel weld of the reinforced upper part of the wall is made to intersect at least one connecting seam of the walls. 7. Bag according to claim 1, characterized in that the parallel welds are made over the entire width of the upper part of the bag. 8. The bag according to claim 1, characterized in that it is made rectangular and contains two two-layer walls connected by welds, preferably double on two sides of its perimeter, and is also equipped with carrying elements in the form of two flat multi-layer handles. 9. The bag according to claim 1, characterized in that it is made rectangular and contains two two-layer walls connected by welds, preferably double on three sides of its perimeter, and is also equipped with carrying elements in the form of two flat multilayer handles. 10. Bag according to claim 1, characterized in that the walls are interconnected by at least one double weld to form at least one cavity for carrying objects. 11. Bag according to claim 1, characterized in that between the adjacent layers of each wall at least one sealed cavity is formed. 12. Bag according to any one of claims 1 to 11, characterized in that the carrying elements and / or walls are made, preferably, of recycled materials. 13. Bag according to any one of claims 1 to 11, characterized in that the carrying elements and / or walls are made, preferably, of high pressure polyethylene. 14. Bag according to claim 1, characterized in that the carrying elements are preferably made in the form of flat multilayer handles. 15. Bag according to 14, characterized in that the layers of multilayer handles are welded or welded together by longitudinal and / or transverse seams. 16. The bag according to claim 1, characterized in that the distance between the centers of fixation of the end parts of each carrying element is from 100 ÷ 190 mm 17. The bag according to claim 1, characterized in that it is equipped with two pairs of carrying elements, the length of one pair being made exceeding the length of the other pair and one element of the indicated pairs is fixed on each wall. 18. Bag according to claim 8, characterized in that the walls are made of a polymer extruded sleeve folded in the longitudinal direction, with the formation of a two-layer fabric, which is sequentially folded twice across its length and welded with welds on two sides. 19. The bag according to claim 9, characterized in that the walls are made of a polymer extruded sleeve folded in the longitudinal direction, with the formation of a two-layer fabric, which is successively folded twice across its length and welded in the middle at the bend and on two sides. 20. The bag according to claim 1, characterized in that the carrying elements are made of a two-layer fabric with a thickness of one layer 30 ÷ 55 μm, a width of 300 ÷ 900 mm, folded several times, preferably two to five times and welded by heating plates, with the formation strips with a width of 30 ÷ 60 mm, a thickness of 120 ÷ 330 microns. 21. The bag according to claim 1, characterized in that the thickness of one layer of the wall of the bag is 25 ÷ 60 μm. 22. The bag according to claim 1, characterized in that the reinforcement in the upper part of the walls is made by not less than 5% of the length of the product in the upper part and not more than 50% of the length of the product.