KR20170117789A - A barrage unit and a method of manufacture of a barrage unit - Google Patents

Abstract

Wherein the embossing unit comprises at least one pad, the pad comprising an absorbent core sandwiched between the liner layers, the absorbent core comprising a crystalline superabsorbent polymer and an absorbent fibrous material, wherein at least 95% Is a form of crystal that is too large to pass through a 600 micron square network.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a sea tide unit and a sea tide unit,

The present invention relates to an embankment unit. More specifically, but not exclusively, the present invention relates to an embossing unit comprising at least one pad, wherein the at least one pad comprises an absorbent core sandwiched between liner layers. In a further aspect, the invention relates to a method of making an embankment unit. More specifically, but not exclusively, the present invention provides a method of making a superabsorbent crystalline material, the method comprising the steps of: introducing fibers of fibrous material into a chamber while providing superabsorbent crystalline material to the chamber so that the superabsorbent crystalline material and fibrous material are mixed, Providing the mixture on the liner layer, and then providing an additional liner layer on the mixture to form the pad.

Sand bags are typically used as flood defense barriers or blast suppression barriers. It is well understood that sandbags can be stacked to form walls or banks.

A typical way to build flood barriers is, for example, stacking sandbags that are filled to act as dykes or dams across an exit to prevent water ingress.

Likewise, a typical method used to inhibit fragmentation is to surround the ordnance with the walls of the sandblast. Subsequently, munitions can explode with little risk of damage to equipment or injuries to humans.

There are many disadvantages of using sand bags. Most importantly, the sandbag must be filled with the proper granular material. While it may be possible to do this in the field, it is extremely time- and labor-intensive. The munition explosion team tends to reduce the additional time it takes to fill the battalion.

A further disadvantage is that the sandblast may be inefficient as a blast suppression means. Without a receptacle, the granular material receives little blast. The receptacle can easily be destroyed when blown up.

Once known, flood defense systems include large turrets filled loosely with superabsorbent polymers. The superabsorbent polymer is placed at one end of the turret and will swell the turret when wet. If the bag is stacked together before wetting, the watertight seal can not be formed.

In addition, the superabsorbent polymer has a high capacity for water absorption, while the absorption rate is low. A bag filled only with superabsorbent polymer can take up to ten minutes to absorb enough water to act as a flood defense barrier.

The present invention seeks to solve the problems of the prior art.

Thus, in a first aspect, the present invention provides an embossing unit comprising at least one pad, wherein the pad comprises an absorbent core sandwiched between the liner layers, the absorbent core comprising a crystalline superabsorbent polymer and an absorbent fibrous material And at least 95% of the mass of the superabsorbent polymer is in the form of crystals that are too large to pass through a 600 micron square mesh.

The embankment unit with this particular size of superabsorbent polymer crystal swells quickly and uniformly.

Preferably, at least 95% of the mass of the superabsorbent polymer is in the form of crystals that are too large to pass through a 600 micron square net.

Preferably, at least 95% of the mass of the superabsorbent polymer is in the form of crystals passing through a 2000 micron square net.

Preferably, at least 95% of the mass of the superabsorbent polymer is in the form of crystals passing through a 1400 micron square net.

Preferably, the superabsorbent polymer is at least one polyacrylate or polyacrylamide.

Preferably, the absorbent fibrous material is pulp fibers.

Preferably, the superabsorbent polymer is distributed substantially evenly through the absorbent fibrous material.

Alternatively, the superabsorbent polymer and the absorbent fibrous material are arranged in layers.

In a further aspect of the present invention, there is provided a method of making an embankment unit comprising at least one pad,

Providing a chamber having an outer wall having at least one aperture;

Providing a liner layer proximate to the opening;

Absorbing the fibers of the fibrous material into the chamber while providing the crystalline superabsorbent material to the chamber so that the two are mixed to form an absorbent core from the openings onto the liner; And

Providing an additional liner layer on the absorbent core to sandwich the absorbent core therebetween to form a pad;

At least 95% of the mass of the superabsorbent polymer is in the form of crystals that are too large to pass through a 600 micron square mesh.

Preferably, the absorbent crystalline material is also introduced into the chamber.

Preferably, the absorbent crystalline material falls into the chamber under gravity.

Preferably, the chamber is rotated about an axis during mixing, and the mixture is deposited on the liner layer when the opening in the outer wall of the chamber is close to the liner layer.

The present invention will now be described, by way of example only, and not by any limiting sense, with reference to the accompanying drawings.
1 is a sectional view of an embankment unit according to the present invention;
Figure 2 shows an alternative embodiment of an embankment unit according to the invention;
3 is a schematic view of a method of manufacturing an embankment unit according to the present invention; And
Figures 4 (a) - 4 (c) detail the deposition of an absorbent core on a liner layer.

1 is a cross-sectional view of an embankment unit 1 according to the present invention. The dyestuff unit 1 comprises an absorbent core 2 sandwiched between a first liner 3 and a second liner 4 to form a pad 5. The two liner layers (3, 4) are sealed together and preferably are joined together.

The liner layers 3, 4 are typically made of a hydrophilic material. A preferred choice is cotton.

The absorbent core (2) comprises a mixture of superabsorbent polymer and absorbent fibrous material. The superabsorbent polymers are preferably polyacrylates or polyacrylamides, especially polyacrylates and / or polyacrylamide salts, for example alkali metal salts such as sodium or potassium salts. These types of materials can retain water up to 200 times its own weight since the crystals can form an absorbent gelling polymer when saturated with a fluid. It will be appreciated by those skilled in the art that mixtures of superabsorbent polymers can be used. The superabsorbent polymer is in the form of crystals. At least 95% of the mass of the superabsorbent polymer is in the form of crystals that are too large to pass through a 600 micron square mesh, more preferably a 800 micron square mesh. Preferably, at least 95% of the mass of the superabsorbent polymer is in the form of crystals passing through a 2000 micron square net, more preferably a 1400 micron square net.

Other materials such as polyacrylamide copolymer, ethylene maleic anhydride copolymer, crosslinked carboxy-methyl-cellulose, polyvinyl alcohol copolymer, crosslinked polyethylene oxide and polyacrylonitrile starch grafts Is also used.

The fibrous material preferably comprises a cellulosic material, for example, pulp fibers, such as wood pulp or fiber crop materials, such as cotton pulp.

The ratio of superabsorbent material to fibrous material may vary depending on the intended use of the dyestuff unit. Of the total absorbent core, the fibrous material may comprise 40% to 80% by weight, preferably 40% to 70% by weight, more preferably 60% to 70% by weight, and the superabsorbent polymer comprises the remaining substantial part can do. In this embodiment, the superabsorbent polymer is evenly distributed throughout the fibrous material.

The pad (5) is received in the bag (6). The volume of the turret 6 is larger than the pad 5, allowing the pad 5 to expand. The turret 6 is typically a jute or hessian material.

The tide unit 1 may be used as a flood defense system. In use, the trolley unit 1 is disposed at a desired location (e.g., an entrance). As the flooded water comes into contact with the dyer unit 1, the pad 5 expands inside the bag 6 to form a barrier. The embankment units 1 may be laminated together in a dry state to form a wall. As the water reaches the wall, the wall expands and is weighted to form an effective barrier against additional floods.

It is important that the embankment unit 1 swiftly and uniformly inflates. Quickness is required to minimize the time between the arrival of water to the bath unit 1, which forms an effective barrier. The uniformity of the expansion is particularly desirable when the aquarium units 1 are laminated to form a wall to ensure that the aquarium units 1 expand in a known manner to form a watertight wall. When the embankment units 1 are uniformly inflated, the resulting wall may not be unstable or watertight. To achieve these objectives, the superabsorbent polymers are preferably evenly distributed throughout the absorbent fibrous material. Alternatively, the superabsorbent polymer may be distributed in layers within the absorbent fibrous material.

The embossing unit 1 may include a plurality of pads 5. In one embodiment, the pads 5 are evenly distributed in layers in the bag 6 as shown in Fig. In an alternative embodiment, the pads 5 are engaged together in the turret 6 to increase the rigidity of the dyer unit 1 when wet.

The embankment unit 1 according to the present invention can also be used as a blast defense system. When used in this manner, one or more dyke units 1 are placed close to the munitions, and then wetted to inflate them. The munitions can then be demolished. The embankment unit (1) finds a specific use with mines and other types of pressure blasting munitions. In this case, the at least one tide unit 1 is placed on the munition in the dry state. The dyer units 1 are then far apart and wetted. As the embankment unit 1 absorbs water, the weight increase explodes the munitions. The wet tide unit 1 suppresses the effect of gusts.

FIG. 3 shows schematically a method for manufacturing an embankment unit 1 according to the present invention. The fibrous material is provided as a fibrous web 10. The web 10 is pulled through the hammer mill 11 and shredded into small pieces here. These pieces, preferably individual fibers, are then introduced into the chamber 13 along the conduit 12.

At the same time as above, the crystalline superabsorbent polymer is introduced into the chamber from the material reservoir 14. Within the chamber, the crystalline superabsorbent polymer has an apparent bulk density in the range of 500 to 800 Kg / m3, more preferably 530 to 700 Kg / m3. Again, this is typically done by blowing the crystalline material along the conduit 15. In an alternative embodiment of the present invention, the crystalline material is slowly deposited in the chamber 13 from the reservoir under the action of gravity.

Within the chamber 13, the action of the fibrous material being introduced into the chamber 13 thoroughly mixes it with the crystalline material. Once mixed together, the mixture is discharged from the chamber 13 onto the liner layer 17 through the opening 16 of the chamber outer shell. In this embodiment, the chamber 13 slowly rotates about the axis 18 as shown. The chamber 13 is also rotated in a fixed housing 19 having an opening 20. This is only the case when the opening 20 of the housing 19 and the opening 16 of the chamber 13 are aligned and the mixture is discharged from the chamber 13 onto the liner layer 17 to form the liner layer 17, The absorbent core 21 is formed.

The deposition of the absorbent core 21 on the liner layer 17 is shown in more detail in Figures 4 (a) - 4 (c). In Fig. 4 (a), the opening 20 of the housing and the opening 16 of the chamber are not aligned. In Figure 4 (b), the chamber 13 is slightly rotated to align with the absorbent core where the openings 16,20 are deposited on the liner layer 17. In Fig. 4 (c), the chamber 13 is further rotated such that the openings 16,20 are no longer aligned.

Referring to FIG. 3, a further liner layer 22 is laid on the absorbent core 21 to form the pad 5 while sandwiching the absorbent core therebetween. The two liner layers 17 and 22 are then cut around the core 21 to join the edges together and then into the porous bag. The open mouth of the turret is typically closed and closed to produce the tie-off unit 1.

Claims (12)

A barrage unit comprising at least one pad, the pad comprising an absorbent core sandwiched between liner layers, the absorbent core comprising a crystalline superabsorbent polymer and an absorbent fibrous material, , Wherein at least 95% of the mass of said superabsorbent polymer is in the form of a crystal that is too large to pass through a 600 micron square net. The baffle unit of claim 1, wherein at least 95% of the mass of the superabsorbent polymer is in the form of a crystal that is too large to pass through a 600 micron square net. The baffle unit of claim 1, wherein at least 95% of the mass of the superabsorbent polymer is in the form of a crystal passing through a 2000 micron square net. 4. The embankment unit of claim 3, wherein at least 95% of the mass of the superabsorbent polymer is in the form of a crystal passing through a 1400 micron square net. 5. An embankment unit according to any one of claims 1 to 4, wherein the superabsorbent polymer is at least one polyacrylate or polyacrylamide. 5. An embankment unit according to any one of claims 1 to 4, wherein the absorbent fibrous material is pulp fibers. 5. An embankment unit according to any one of claims 1 to 4, wherein said superabsorbent polymer is distributed substantially evenly through said absorbent fibrous material. 5. An embankment unit according to any one of claims 1 to 4, wherein the superabsorbent polymer and the absorbent fibrous material are arranged in layers. A method of making an anchoring unit comprising at least one pad,
Providing a chamber having an outer wall having at least one aperture;
Providing a liner layer proximate said opening;
Absorbing material is introduced into the chamber while providing the crystalline superabsorbent material to the chamber so that the crystalline superabsorbent material and the fibrous material are mixed and allowed to escape from the opening onto the liner to form an absorbent core ; And
Providing an additional liner layer on the absorbent core to sandwich the absorbent core therebetween to form a pad,
Wherein at least 95% of the mass of the superabsorbent polymer is in the form of a crystal that is too large to pass through a 600 micron square net. 10. The method of claim 9, wherein the absorbent crystalline material is also introduced into the chamber. 10. The method of claim 9, wherein the absorbent crystalline material falls into the chamber under gravity. 12. The method according to any one of claims 9 to 11, wherein the chamber is rotated about an axis during mixing, the mixture is deposited on the liner layer when the opening of the outer wall of the chamber is close to the liner layer The method comprising the steps of:

Images