Thermoplastic polyolefin impermeable composite material and preparation method thereof

A technology of thermoplastic polyolefin and composite materials, which is applied in the field of anti-seepage materials, can solve problems such as insufficient flexibility, and achieve the effects of simple processing technology, long service life and high hydrostatic pressure resistance

Inactive Publication Date: 2017-07-14
BEIJING ORIENTAL YUHONG WATERPROOF TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention aims at the problem that the existing anti-seepage materials are not flexible enough and cannot be directly exposed to be applied to dam anti-seepage, and provides a kind of anti-seepage material with good flexibility and excellent puncture resistance, which is suitable for dams, reservoirs, embankments, cofferdams, and canals. Thermoplastic polyolefin anti-seepage composite material for new construction and maintenance of hydropower and water conservancy projects such as tunnels, nuclear power plants and its preparation method

Method used

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  • Thermoplastic polyolefin impermeable composite material and preparation method thereof
  • Thermoplastic polyolefin impermeable composite material and preparation method thereof
  • Thermoplastic polyolefin impermeable composite material and preparation method thereof

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Embodiment 1

[0035] This embodiment provides a thermoplastic polyolefin anti-seepage composite material, such as figure 1 As shown, it includes a thermoplastic polyolefin composite layer and a geotextile layer 3; the thermoplastic polyolefin composite layer includes a cross-laminated polyolefin layer 2 and a thermoplastic polyolefin layer 1.

[0036] The thermoplastic polyolefin composite layer of the present embodiment has a width of 1m, and the geotextile layer 3 has a grammage of 100g / m 2 non-woven polypropylene geotextile, one end of the geotextile layer 3 is 5 cm away from the edges of the two ends of the thermoplastic polyolefin layer as the lap edge 4.

[0037] The preparation method of the thermoplastic polyolefin anti-seepage composite material of the present embodiment is as follows:

[0038] (1) Place the raw material of the cross-laminated polyolefin layer 2 in the first screw extruder unit and the second screw extruder, and at a screw speed of 100 rpm, the melt extrusion widt...

Embodiment 2

[0045] This embodiment provides a thermoplastic polyolefin anti-seepage composite material, such as figure 2 As shown, it includes a thermoplastic polyolefin composite layer and upper and lower geotextile layers 3; the thermoplastic polyolefin composite layer includes a cross-laminated polyolefin layer 2 and a thermoplastic polyolefin layer 1, and the infrared absorption spectrum of the thermoplastic polyolefin layer picture see Figure 4 .

[0046] The upper floor geotextile layer 3 of the present embodiment is the grammage 500g / m 2 The non-woven needle-punched polyester geotextile, the lower geotextile layer 3 is 1000g / m 2 The spun polypropylene long-fiber geotextile; the thermoplastic polyolefin composite layer has a thickness of 2.5mm and a width of 2m;

[0047] The preparation method of the thermoplastic polyolefin anti-seepage composite material of the present embodiment is as follows:

[0048] (1) Place the raw material of the cross-laminated polyolefin layer 2 in ...

Embodiment 3

[0054] This embodiment provides a thermoplastic polyolefin anti-seepage composite material, which includes a thermoplastic polyolefin composite layer and a geotextile layer 3 ; the thermoplastic polyolefin composite layer includes a cross-laminated polyolefin layer 2 and a thermoplastic polyolefin layer 1 .

[0055] The thermoplastic polyolefin composite layer of the present embodiment has a width of 2m, and the geotextile layer 3 has a grammage of 1000g / m 2 A non-woven needle-punched polyester geotextile, and the two ends of the geotextile layer 3 are 15 cm away from the edge of one end of the thermoplastic polyolefin layer as the overlapping edge 4.

[0056] The preparation method of the thermoplastic polyolefin anti-seepage composite material of the present embodiment is as follows:

[0057] (1) The raw material of the cross-laminated polyolefin layer 2 is placed in the first screw extruder unit, the screw speed is 400 revolutions / min, and the polyolefin film with a width o...

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Abstract

The invention provides a thermoplastic polyolefin impermeable composite material, belonging to the technical field of impermeable materials. The invention can solve the problems of inadequate flexibility and incapable application to seepage control of a dam under direct exposure for a conventional impermeable material. The thermoplastic polyolefin impermeable composite material provided by the invention comprises a cross-laminated polyolefin layer, a thermoplastic polyolefin layer compounded thermoplastic polyolefin composite layer and a geotextile layer. The composite material has excellent puncture resistance, high burst strength, strong hydrostatic pressure resistance and excellent thermal weldability, can bear impact with hydraulic pressure of 200 m or above, and meets the application of high impermeable water head water-power engineering. The composite material provided by the invention is free of any plasticizers, has flexibility similar to the flexibility of a rubber material, can be used under direct exposure, and has long service life.

Description

technical field [0001] The invention belongs to the technical field of anti-seepage materials, and in particular relates to a thermoplastic polyolefin anti-seepage composite material and a preparation method thereof. Background technique [0002] During the construction or operation of concrete roller compacted rockfill dams, rockfall or special-shaped sharp protrusions inevitably exist, and these falling rocks or special-shaped sharp protrusions will pierce the geotechnical composite anti-seepage material directly exposed on it, lead to damage to the impermeable structure. [0003] High-density polyethylene (HDPE) geomembrane material has excellent puncture resistance, extremely low water vapor transmission performance and good chemical corrosion resistance, but this product has a high modulus, is relatively hard, and has high requirements for the flatness of the base layer. At the same time, HDPE geomembrane cannot be directly exposed. The PVC geomembrane has good flexib...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B27/32B32B27/08B32B27/12B32B37/10B29C47/00C08L23/06C08L23/12C08K5/134C08K5/3492C08K3/26
CPCB32B27/08B32B27/12B32B27/32B32B37/10B32B2307/30B32B2307/306B32B2307/558B29C48/08C08K3/26C08K5/1345C08K5/3492C08K2003/265C08L23/06C08L23/12
Inventor 韩忠强段文锋楚跃先宗敦峰周建平田凤兰
Owner BEIJING ORIENTAL YUHONG WATERPROOF TECH CO LTD
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