Method of production of the waterproofing material (versions)

FIELD: chemical industry; other industries; methods of production of the waterproofing materials in the sheet shape.

SUBSTANCE: the invention presents the method of production of the waterproofing materials in the sheet shape, which is used for facing of the ponds, lakes and the refuse dumps provides for disposition of the central layer containing the capable to swelling bentonite between appropriate carrying layers, and joining of the carrying layers by the ultrasonic welding in the intervals or along one or more lines by means of making the base plate protrusion to get in contact with one carrying layer and making the sonotrode to get in contact with the other carrying layer in the opposite places and in the intervals or along one or more lines and at such a control over the sonotrode, that to cut through the central layer and to join the carrying layers. The invention presents the characteristic of the second version the method of production. The technical result of the invention is the increased strength of the produced waterproofing material at its shift.

EFFECT: the invention ensures the increased strength of the produced waterproofing material at its shift.

14 cl, 5 dwg

 

The present invention relates to a method of manufacturing a waterproofing material in sheet form, in which is placed the Central layer, which contains the capable of swelling bentonite, between the respective bearing layers.

This material is used as cladding for the purpose of holding water in artificial ponds, lakes, lagoons, etc. It is also used for facing and overlapping, i.e. covering, landfills, which is located below the soil must be protected from leakage of contaminated fluid. It is used to accomplish similar purposes and placed under the petrol (gasoline) stations to prevent groundwater contamination by leakage of such material. It can also be used more widely as a waterproofing layer under buildings and other structures, as well as the roofing material.

In one form the Central layer contains bentonite in the form of particles or granules, and bearing layers are connected, or by postegivaniya, or by the piercing needle of a layer of clay. The material in this form is described in EP-A-0059625, EP-A-0246311 and GB2202185. Such material should be wet after laying, so that the clay absorbs water before you become impenetrable. If the material is damaged during transport or wetting the directly the public will be uneven or insufficient, the uniformity and reliability of the waterproofing layer can be dubious.

Publication WO97/36060 international application discloses a similar material, in which the Central layer contains particles of bentonite and load-bearing layers, one of which is made permeable, and the other is made of impermeable plastic and with the tabs intervals, are connected by thermal welding such ledges.

In another form the Central layer of bentonite is already partially hydratious by mixing with water and with a variety of additional dissolved substances to form a plastic mass which is then ekstragiruyut or roll, giving it the shape of a leaf. Thus the material is already provided with sealing before installation, and proof - homogeneous. The material in this form is described in the originating application WO94/05863.

The disadvantage of the latter type of material is a low shear strength. Because bearing layers are not connected, they can slide relative to each other when the clay in the Central layer acts as a lubricant. This eliminates the use of such material on inclined substrates, where the angle exceeds approximately 6-8°. This precludes its use in many cases disposal.

The purpose of this invention is the elimination of the specified n is wealth.

Based on this purpose, according to the invention results from the method of manufacturing a waterproofing material specified in the first paragraph, characterized in that the bearing layers are interconnected by ultrasonic welding intervals and/or along one or more lines.

This method of connection bearing layer is applicable to both forms of the material described above, namely the one in which the Central layer forms the bentonite in the form of particles, and to that which has a Central layer containing clay and made of plastic (deformable) mass.

Bearing layers of such materials are typically woven or non-woven textile canvases with permeability, since it is necessary to allow water to penetrate into the Central containing the clay layer and to form a durable essentially impermeable layer. However, the known materials of this type, including proprietary product of the applicant "Slabseal", in which one of the bearing layer is impermeable membrane made of plastic.

For the purposes of the present invention is preferable for use as the load-bearing layers are non-woven textile fabrics. They can be properly made of polypropylene fibers, although it is possible to use other materials, such as fibers of polyvinyl chloride, or polyethylene, or is ifira.

In some embodiments of possible inclusion in the Central layer of reinforcement in the form of a grid. One of the bearing layer can then be connected to the armature of the first sequence of ultrasonic welding, while the other supporting layer is connected with the armature of the second sequence of ultrasonic welding, the position of which is shifted relative to the first sequence. This gives the advantage that there is always a certain thickness of the core waterproofing material, i.e., no potentially permeable intervals.

The invention will be described hereinafter based on examples with reference to the accompanying drawings, on which:

figure 1 schematically shows a perspective view showing how the first embodiment of the invention a small portion of the weld material in a straight line ultrasonic tool;

figure 2 shows a similar view, showing the material after welding;

figure 3 shows a section along the line A-a in figure 2;

figure 4 schematically shows a perspective view of the second variant of realization of the material according to the present invention; and

figure 5 shows a section along the line b-b In figure 4.

As shown in Fig.1-3, the first typical example of the implementation has a Central layer 10 of a composition containing palpitations bentonite, which is rakatan or extruded into sheet form and is clamped between the respective carrier layers 12, 14.

Preferably both the supporting layer 12, 14 is made of non-woven textile fabrics, such as polypropylene. The use of non-woven material allows to obtain more durable weld. However, it is possible to obtain a sufficient seam strength using a single non-woven base layer and one woven carrier layer. You can also use one base layer of an impermeable film, and the other woven or non-woven textile.

Once in full production the width of the material may reach 5 m Shows only a small area and one means of ultrasonic welding load bearing layers. As shown in figure 1, the material is placed on the base plate 20 on which there is a protrusion 22 with a triangular cross-section. The working tool of the machine for ultrasonic welding or the sonotrode 24 is brought into contact with the protrusion 22 with a triangular cross-section, which serves for separation of the material of the Central layer 10. In the application of ultrasound is the separation of the Central layer and two pieces 12, 14 are welded to each other.

Received the welding line 18 shown in figure 2 and 3.

Preliminary tests show that many separated by intervals of weld lines with the distance between them from a few centimetres to more than 1 m, when both media are non-woven dress and cover the new painting, will increase the shear strength to a level comparable with commercially available material of the type in which the Central layer consists of particles, and bearing layers are connected by postegivaniya, or penetration by a needle, or in any other way. This will allow you to use the material on any steep slope of about 60°.

Where the part containing the clay material of the Central layer 10 remains between the carrier layers 12 and 14 along the line of the weld 18, the weld strength decreases at the rate of 50%, as shown by the dimension of effort that needs to be separation between the layers 12 and 14.

Between any of the supporting layers 12, 14 and the Central layer 10 may be placed an additional layer of an impermeable film, such as polypropylene or polyvinyl chloride. This in some cases can increase the weld strength. However, its main purpose is to control the permeability of the composite material and the prevention of permeability weld lines 18 and the total violation of the integrity of the impermeable water barrier formed by the composite.

In other embodiments of strip impermeable film of a width of only 5 mm can be placed on the ground weld lines. They can be placed before welding between the Central layer 10 and any of the layers 12, 14, or both. On the other sides of the, such strips can be stacked, and possibly attached on the outer surface of any one of the carrier layers 12, 14 either before or after welding.

Welding line, which can have a length of about 15 mm, can also be filled from the outside by adding containing bentonite deformable material, comparable to that in the Central layer 10.

Many are separated by intervals of weld lines can properly be placed either parallel or perpendicular to the width of the composite material. Thus, he can get the appearance duvet. However, it may be appropriate drawings of the outer welding, such as spot welding, circular welding, distributed material, or a continuous line across the width, streaked near the edges to prevent mutual overlap when laying the material on the spot. It is also possible zigzag welding line across the material.

Further development is illustrated in figure 4 and 5. To improve the resistance of the material relative to the sliding bearing layer, the Central layer 10 include a perforated reinforcing means. In the illustrated example polypropylene mesh 16 is included in the Central layer 10 between the layers 12, 14 (the same digital position as in figure 1-3). This mesh is welded by ultrasound with both bearing Sloane, 14. As shown, the welding line 26 connecting the first supporting layer 12 with a grid 16 is offset from the weld lines 28 connecting the second supporting layer 14 with a grid 16. This reduces the danger of permeability of welds, as there always remains a certain layer of the core material.

1. Method of manufacturing a waterproofing material in sheet form, in which is placed the Central layer (10), containing capable of swelling bentonite, between the respective bearing layers (12, 14), and connect the load-bearing layers by ultrasonic welding (18) intervals or along one or more lines by bringing the protrusion (22) of the base plate in contact with one bearing layer and bring the sonotrode (24) in contact with another bearing layer in the other locations and intervals or along one or more lines and the control sonotrode to penetrate the Central layer (10) and to connect the load-bearing layers.

2. The method according to claim 1, wherein the Central layer comprises a flexible perforated fixture.

3. The method according to claim 2, in which the valve is mesh (16) made of plastic.

4. The method according to claim 1, wherein at least one of the load-bearing layers (12, 14) contains a non-woven textile fabric.

5. The method according to any one of claims 1 to 4, wherein the load-bearing layers (12, 14) include polypropylene, polyethylene or polyvinyl chloride.

6. JV the property according to any one of claims 1 to 4, which produce waterproofing material containing an additional layer that is impermeable film or membrane.

7. The method according to claim 1, wherein the impermeable film or membrane is located in places of ultrasonic welding.

8. The method according to any one of claims 1 to 4 or 7, wherein the Central layer (10) formed by extrusion or by rolling a deformable plastic mass in which the bentonite is palpitations.

9. Method of manufacturing a waterproofing material in sheet form, in which is placed the Central layer (10), containing capable of swelling bentonite, between the respective bearing layers (12, 14), and within the Central layer is placed mesh reinforcement (16), connect one of the first bearing layer (12) on the valve by means of ultrasonic welding in the first sequence of places (26) by connecting protrusion base plate in contact with the first bearing layer and bring the sonotrode in contact with another bearing layer in opposite positions so as to penetrate the Central layer and attach the first supporting layer to valve, and connect the other of the second bearing layer (14) on the valve by means of ultrasonic welding in the second sequence of places (28), offset from the first sequence, by bringing the protrusion base plate, in the context of the act with the second bearing layer and bring the sonotrode in contact with the first bearing layer in opposite positions, in order to penetrate the Central layer and attach the second supporting layer to the fixture.

10. The method according to claim 9, wherein at least one of the load-bearing layers (12, 14) contains a non-woven textile fabric.

11. The method according to claim 9 or 10, wherein the load-bearing layers (12, 14) include polypropylene, polyethylene or polyvinyl chloride.

12. The method according to claim 9 or 10, which produce waterproofing material containing an additional layer that is impermeable film or membrane.

13. The method according to claim 9, in which impermeable film or membrane is located in places of ultrasonic welding.

14. The method according to any of PP,10 or 13, wherein the Central layer (10) formed by extrusion or by rolling a deformable plastic mass in which the bentonite is palpitations.



 

Same patents:

FIELD: oil industry, particularly oil-field construction, namely to built storage pit adapted for oil-drilling waste storage.

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EFFECT: increased liquid product storage reliability.

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