SU1028243A3 - Bag of film material - Google Patents

Description

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FIG. f The invention relates to packaging. Bags of tubular plastic material with a filling valve of various designs are known. The closest to the proposed technical essence and the achieved result is a bag of film material with a filling valve located at the end of the pipe with a gas-permeable retaining fine material with a layer of П ПР When stacking bags after they are filled, there are difficulties. The crushed material, which with a large amount of air is filled with a bag of this type, tends to be torn out along with the air in the bag and may stick to the outside surface of the bag. In the future, it acts like a lubricant, violating the stability of the stack of bags | FROM film material. In addition, it has been found that when air is pulled out of bags stacked in a stack with leaky valves or parts of the bag, not only the air is released, but also small quantities of sprayed or crushed. a product that creates a large number of undesired slip points in a stack of bags. This slip is increased due to the fact that the material spilled out of the bag adheres to the outer surface of the bags due to the expansion of electrostatic charges. Giving the bags a ribbed outer surface did not give the desired results. In this connection, the sprayed materials are packaged exclusively in paper bags. However, these paper bags do not withstand excessive moisture and can easily be damaged during long-distance transportation, which leads to loss of m. Supply of the entire wall of the bag with small pores that allow only air to escape , it turned out ineffective. Not only the air comes out too slowly, but the sprayed material also passes through the pores or clogs the HXi. The purpose of the invention is to improve the ease of stacking by providing a more complete release of gas from the bag to the outside after loading. This goal is achieved by the fact that a bag of film material containing a filling valve located at the bottom of the bottom with a gas-permeable layer containing a gas-dispersed material is provided with a pocket made of breathable material. felt or non-woven material based on polyester or polyethylene fibers attached to the other end of the bottom to its edges. Preferably, the pocket length exceeds the width of the inner edge of the bottom. The use of a pocket of gas-permeable material makes it easy to remove the bag from the keg of the loading device after the bag is filled, since the bag of film material, which is usually flat, can be straightened with the introduction of the hand in the specified card1 of gas-permeable material. In addition, a pocket of gas permeable material allows air to easily escape from the internal volume of the bag. Gas-permeable material, it is advisable to produce from non-woven or thermoplastic materials, in particular from non-woven material from polyester or polyethylene fibers. Polyester fibers are preferred. The gas permeable layer provides an outlet for air or another gas in the plane of the layer and perpendicular to it. This provides an optimal deaera; Fig. 1 shows a part of a bag of film material with a filling valve; in fig. 2 - part of the bag containing a gas-permeable layer located opposite the filling valve, made in the form of a pocket of nonwoven material; in fig. 3d bag, equipped with a filling valve and a gas-permeable pocket in accordance with Fig. 1 and 2, top view; in fig. 4 - Fill-; The gas valve and the gas permeable bag pocket of FIG. 3, cross section. FIG. 1 shows a bag 1 of a film material containing an anterior research institute and back layers forming together a film tube of, for example, a polyethylene film material. Bag 1 is provided with a bottom 2, formed by the first folding edge 3 of the bottom and a second folding edge 4 of the bottom, which are joined together by glueing or a welding seam 5. The first and second folding edges of the bottom 3 and 4 have the edge and 7 respectively. 8 and the second .9 corner folding edges. The first corner of the folding edge 8 has the first edge of the LO ,. located inside the bag. The second corner flap 9 has a second edge 11. After the formation of the corner edges 8 and 9, valve tube 12 is installed inside the corner edge 8. Preferably, the inner end portion 13, 14 is bent back towards the protruding end 15 of the valve tube 12 and fixed. the first corner edge 8 and the outer film layer of the bottom 16.

The valve tube 12 forms a filling valve 17 located inside the bag and extending into the bag next to edge 10 of the first corner edge 5.

Part 15 of the free end of the filling valve tube 12 extends beyond the internal volume of the bag; By- . by means of adhesive joints, or by the welds 18 and 19, the valve tube 12 is connected to the corner edge 8 and to the outer film layer 16 of the bottom, which is attached to the backward edges 3 and 4 of the bottom along the entire length thereof. Above 15 second angular flap edge 9, a pocket 20 of gas permeable material is fixed, having a length such that it extends beyond the inner edge 11 of the second angular edge 9 inside the bag.

Near its free end, 21 pocket 20 is attached to the film one. to the bottom layer 16, to the folding 25 edges 3 and 4 of the bottom, folded, towards each other, and the second part 9 located directly below it, the fastening of the pocket 20 is carried out by means of glue or weld. .

Retention of fine materials gas-permeable pocket 20

provides a gas outlet: or air used to fill the bag

and located in the bag because

The internal volume of the metacluster is connected to the external environment through a gas-permeable pocket 20. This gas-permeable pocket 20 cuts layers 22 and 23 j4d, the edges of which are joined together or

are integral, forming a gas-permeable pocket 20.

After filling the bag in

the loading machine, during which the bag is suspended to the loading machine by the valve tube 12, the bag can be easily separated from the loading machine, because when the hand is inserted into the pocket 20, the bag is up to the r-i-ioro moment; was very smooth, can be captured and disconnected from the loading machine.

For this purpose, the shed 24 of the pocket 20 is opened, after which a hand is inserted into the pocket 20 until it is held; reaches the bottom 25 of the pocket 20, which is inside the bag beyond the edge 11 of the second corner edge 9. The second corner folding edge 9 and the outer film layer 16 of the bottom cannot contact each other, so that an optimal removal of gas or air is ensured. The bottom 25. of the pocket forms a gas-permeable connection between the two layers 22 to 23.

The adhesive material strips or welds 26 and 27 connect the pocket layer 22 with the inner side bent inward into the portions of the folding edges 28 and 29 of the bottom and with the outer layer 16. Also, the layer 23 with the corner edge 9.

The shed 30 of the filling valve 12 is opened to fill the bag. In FIG. 3 shows that between the film of the tubular valve 12 and the inner side of the curved parts of the edges 3 and 4 of the bottom there are strips of adhesive material or welds 31 and 32. In order to avoid loose parts of the outer layer 16 of the bottom edge 33 of the outer layer 16 completely connected to the valve tube 12 over its entire width in a flat state.

The invention allows, when using bags with a gas-permeable layer, not to break the strength of any of their walls.

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FIG. 2

Claims (2)

(Ώ) 57) 1. A BAG FROM FILM MATERIAL containing a filling valve located at the end of the bottom with a gas-permeable trapping fine materials layer, characterized in that, in order to improve stacking convenience by providing a more complete release of gases from the bag into the outer space after loading, it is equipped with a pocket made of breathable felt on the base of polyester or polyethylene fibers, attached at the other end of the bottom to its edges. 2. A bag of pop. 1, distinguished by the fact that the length of the pocket exceeds the width of the inner edge of the bottom.