DE9215563U1 - Transport and storage containers made of flexible material - Google Patents

Description

Ortwin M. Zeißig GmbH & Co. KG, Remscheider Str. 5, 4330 Mülheim an der Ruhr 13

Transport and storage containers made of flexible material

The invention relates to a container for the transport and storage of bulk goods in particular, which is made of a flexible and moisture-impermeable material, for example a coated fabric, which forms any shape that can be created by sewn seams with different capacities for the bulk goods, with sealing strips sewn into the seams, and which has at least one emptying and/or filling opening and can be provided with transport elements, for example loops.

Flexible containers, so-called big bags, made of fabric or coated fabric or foil, are used for the transport and storage, primarily of bulk goods, but also of liquids.

The choice of the appropriate material is determined depending on the required load-bearing capacity, stability and impermeability to moisture. In addition to various types of fabrics and coated fabrics, plastic films or high-quality coated polypropylene ribbon fabrics are used.

The containers are usually made from webs or tubular material using a sewing process.

Even when using waterproof, especially coated fabrics or other materials, there are great difficulties in making the existing seams waterproof. Leaks in the seams lead to spoilage or leakage of the contents during transport, but especially during long-term storage.

In order to eliminate the leak in the seam area, attempts were made to insert another container made of plastic film and welded in the seam area into the flexible container. Apart from the considerable material expenditure of a double-walled or multi-layered container, the manufacturing effort and cost are very high.

In order to reduce the costs associated with the additional inner container, it has also been proposed to seal the vulnerable seam areas by using sewing threads that close the needle holes when they absorb moisture by swelling the thread. This can seal the needle holes to a certain extent, but it still does not prevent moisture from entering or leaving the container in the areas between the needle holes.

According to another design for making the seam area of flexible containers watertight, a foam strip or a felt or felt cardboard strip is inserted into the seam during sewing. However, such a measure only has a limited effect, since such a seam sealing material develops a so-called wicking effect, which transports the moisture from the outside to the inside into the container or into the contents, or the contents from the inside to the outside out of the container.

It is also possible to seal a container intended for transport or storage from the inside in the seam areas by applying sealing compound using a suitably stable fabric. This type of process is very costly and does not exclude sources of error, as the containers, which are often closed except for the filling or emptying opening, are not fully accessible.

The invention is based on the object of sealing the seams of flexible containers in a simple manner in such a way that moisture cannot escape from the inside to the outside or penetrate from the outside to the inside during transport or storage.

This object is achieved according to the invention in that the sealing strip arranged between the edge strips of the container skin forming a seam is designed as a carrier material that absorbs a liquid absorbing agent with swelling properties.

Such a sealing strip designed as a carrier material consists, for example, of a fleece or cotton wool, whereby any material is suitable which, in combination with a liquid absorbing agent, in particular in

Powder form with swelling properties to exclude a so-called wicking effect.

The liquid absorber swells through and around the carrier material when it absorbs moisture, storing the water and blocking further water from entering. So-called superabsorbents, which can absorb up to 200 times their original volume of liquid, are suitable for this type of effect.

In an advantageous embodiment of the invention, the sealing strip is designed as a single layer or double layer or has a tube or cord shape and is covered or filled with a liquid absorbing agent. The powder material can also be bonded to the carrier material by gluing or sintering.

The sealing strip as a carrier material is inserted into the edge areas intended for the seam and is at least partially incorporated into the seam.

In a double-layer folded version of the sealing strip, the fold can be directed either outwards or into the container.

Sealing the seams of flexible containers according to the invention enables the containers to be used for the transport and storage of liquids or liquid-enriched goods.

In addition, it is possible to design the containers in an adapted form, especially for the transport of liquids or bulk goods, such as building materials, in mine wagons for underground operations.

The drawings show an embodiment of the invention, which is explained in more detail below.

Show it:

Figure 1 is a perspective view of a container made of flexible material intended for the transport or storage of bulk goods or liquids and

Figure 2 a-c various embodiments of seams shown in section.

The container 1 shown in perspective view in Figure 1 represents an embodiment of a flexible container which is made from a coated fabric, for example, and is intended for the transport of bulk goods and has a filling opening 4 and an emptying opening 5 in the bottom (not shown in detail).

The container 1 has transport elements 8 in the form of loops at the upper corners. The filling opening 4 as well as the emptying opening 5 (not shown in detail) are usually closed with straps 11 or clips for transport.

The webs intended for the production of the containers 1 are sewn together using seams 3 to form a specific shape and size. The container 1 has a container skin 2 on six sides in the specified cube shape, which are connected in the corresponding edge areas 6 by seams 3.

The seams 3 indicated in Figure 1 are shown in section in Figure 2 as examples in various embodiments.

The edge strips 6 of the container skin 2, each intended for connecting a seam 3, are sewn tightly by means of a seam 3 after inserting a for example double-layered sealing strip 7 made of fleece as a carrier material that is coated or filled with a liquid absorbent. When in contact with a liquid from the inside or outside, the sealing strip 7 swells in conjunction with the liquid absorbent by storing the water and blocks further liquid passage from the inside to the outside or from the outside to the inside. The fleece is usually used in a double-layered version in order to be able to absorb the swelling agent.

The double layering of the sealing strip 7 is achieved in the example shown by a fold 10 of the fleece which is already present in double layers, whereby according to the embodiment in Figure 2a the fold 10 is arranged outwards and according to the embodiment in Figure 2b the fold 10 is arranged inside the container.

In Figure 2c, the sealing strip 7 is inserted in the form of a tube between the edge strips 6 of the container skin 2. The conceivable designs of the seams 3 encompass every design and include at least the partial inclusion of the sealing strip 7 in the seam 3.

container

Container skin

seam

Filling opening

Drain opening

Edge strips

Sealing strips

Transport element

Ribbons Folding Ribbons

Claims (8)

Ortwin M. Zeißig GmbH & Co. KG, Remscheider Str. 5, Mülheim an der Ruhr 13 Transport and storage containers made of flexible material Protection claims; 1. Container for the transport and storage of bulk goods in particular, which is made of a flexible and moisture-impermeable material, for example a coated fabric, which forms any shape that can be created by sewn seams with different capacities for the bulk material, wherein sealing strips are sewn into the seams and which has at least one emptying and/or filling opening and can be provided with transport elements, for example loops, characterized in that the sealing strip (7) arranged between the edge strips (6) of the container skin (2) forming a seam (3) is designed as a carrier material that absorbs a liquid absorbing agent with swelling properties. 2. Container according to claim 1, characterized in that the carrier material is designed, for example, as a fleece, cotton wool or a comparable material which absorbs a liquid absorbing agent in powder form. 3. Container according to claim 1, characterized in that the sealing strip (7) is single-layered or cord-shaped. 4. Container according to the preceding claims, characterized in that the liquid absorbing agent in powder form can be integrated into the carrier material designed as a sealing strip (7) by sprinkling, gluing or sintering. 5. Container according to one of the preceding claims, characterized in that the sealing strip (7) is inserted into the seam (3) in folded form, the fold (10) being arranged facing outwards. 6. Container according to one of the preceding claims, characterized in that the sealing strip (7) is inserted in folded form into the seam (3), the fold (10) being arranged directed into the container (1). 7. Container according to one of the preceding claims, characterized in that the two-layer sealing strip (7) has a tubular shape and is filled with a liquid absorbing agent. 8. Container according to one of the preceding claims, characterized in that the sealing strip (7) is at least partially incorporated into the seam (3) independently of the formation of the seam (3).