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Heavy metal blocking fiber net/high polymer composite waterproof coiled material and preparation method thereof

A technology for waterproofing membranes and fiber nets, which is applied in chemical instruments and methods, flat products, building components, etc., can solve the problems of excessive heavy metals in groundwater, soil heavy metal pollution, cumbersome laying projects, etc., and achieves a small and good vertical permeability coefficient. The effect of mechanical properties

Pending Publication Date: 2021-08-17
湖南盛业土工材料制造有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The minerals obtained in mining, mineral smelting and landfill areas are directly piled up in the open air. With the erosion of rainwater, heavy metal ions will directly enter the groundwater along with the water, resulting in excessive heavy metals in the groundwater. On the other hand, the heavy metal pollution in the soil in this area is serious
In the prior art, geotextiles, drainage nets and geotextiles are mainly used in combination, and they are laid on the bottom to achieve the effect of anti-seepage, but the laying project is cumbersome, and it is impossible to achieve the adsorption treatment of heavy metals

Method used

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  • Heavy metal blocking fiber net/high polymer composite waterproof coiled material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Such as figure 1 As shown, the barrier heavy metal fiber mesh / polymer composite waterproof membrane provided by the present invention includes a first three-dimensional fiber mesh layer, a high polymer layer and a second fiber mesh layer. Its preparation method is as follows:

[0027] S1: Ethylene-vinyl acetate copolymer (EVA) modification treatment: Take 50 parts of EVA, 5 parts of butyl xanthic acid, mix and dissolve, add initiator sodium persulfate and crosslinking agent N, N-dimethylacrylamide, After reacting at a temperature of 85°C for 4 hours, the modified EVA was obtained;

[0028] S2: After the PET fiber is opened by an opener, it is sent into a carding machine to be carded into a single-layer fiber web, and the single-layer fiber web is sent to a cross-lapper to form a fluffy three-dimensional fiber web, and then the The fluffy fiber web is sent to the pre-needling machine and the main needling machine for mechanical acupuncture consolidation to form a three...

Embodiment 2

[0032] Such as figure 1 As shown, the barrier heavy metal fiber mesh / polymer composite waterproof membrane provided by the present invention includes a first three-dimensional fiber mesh layer, a high polymer layer and a second fiber mesh layer. Its preparation method is as follows:

[0033] S1: EVA modification treatment: Take 50 parts of EVA and 5 parts of butyl xanthic acid, mix and dissolve, add initiator sodium persulfate and crosslinking agent N, N-dimethylacrylamide, and react at a temperature of 85 °C After 4h, obtain modified EVA;

[0034] S2: After the PET fiber is opened by an opener, it is sent into a carding machine to be carded into a single-layer fiber web, and the single-layer fiber web is sent to a cross-lapper to form a fluffy three-dimensional fiber web, and then the The fluffy fiber web is sent to the pre-needling machine and the main needling machine for mechanical acupuncture consolidation to form a three-dimensional fiber web;

[0035] S3: Take 20 par...

Embodiment 3

[0038] S1: EVA modification treatment: Take 50 parts of EVA and 5 parts of butyl xanthic acid, mix and dissolve, add initiator sodium persulfate and crosslinking agent N, N-dimethylacrylamide, and react at a temperature of 85 °C After 4h, obtain modified EVA;

[0039] S2: After the PET fiber is opened by an opener, it is sent into a carding machine to be carded into a single-layer fiber web, and the single-layer fiber web is sent to a cross-lapper to form a fluffy three-dimensional fiber web, and then the The fluffy fiber web is sent to the pre-needling machine and the main needling machine for mechanical acupuncture consolidation to form a three-dimensional fiber web;

[0040] S3: Mix 30 parts of modified EVA, 30 parts of HDPE and 30 parts of mPE, add them into an extruder, melt them at 150°C to form a modified high polymer melt, and pass the modified high polymer melt through the extruder Uniformly extrude on the surface of the three-dimensional fiber, and then cover the ot...

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Abstract

The invention relates to technical application of geotechnical materials, in particular to a heavy metal blocking fiber net / high polymer composite waterproof coiled material and a preparation method thereof. The composite waterproof coiled material specifically comprises a modified high polymer layer and three-dimensional fiber net layers arranged on the upper side and the lower side of the modified high polymer layer. The modified high polymer layer is prepared from the following raw materials: 10 to 30 parts of modified ethylene-vinyl acetate copolymer, 30 to 50 parts of high density polyethylene and 10 to 30 parts of metallocene polyethylene; the modified ethylene-vinyl acetate copolymer is obtained by initiating crosslinking modification of an ethylene-vinyl acetate copolymer and butyl xanthic acid; and the three-dimensional fiber web layers are obtained by opening, carding to form a web, laying the web and needling PET fibers. The composite material can adsorb heavy metal ions and achieve heavy metal blocking, has good mechanical properties, is resistant to high temperature and acid and alkali, and can be widely applied to geotechnical materials for soil pollution environment treatment.

Description

technical field [0001] The invention relates to the technical application of geotechnical materials, in particular to a barrier heavy metal fiber net / high polymer composite waterproof coiled material and a preparation method thereof. Background technique [0002] Heavy metal pollution is more serious in mining areas, leading to an increase in heavy metal content in the surrounding living environment, which exceeds the normal range and directly endangers human health. [0003] The minerals obtained in mining, mineral smelting and landfill areas are directly piled up in the open air. With the erosion of rainwater, heavy metal ions will directly enter the groundwater along with the water, resulting in excessive heavy metals in the groundwater. On the other hand, the heavy metal pollution in the soil in this area is serious . In the prior art, geotextiles, drainage nets and geotechnical pads are mainly used together to lay on the bottom to achieve the anti-seepage effect, but t...

Claims

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Application Information

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IPC IPC(8): B32B27/02B32B27/36B32B3/24B32B5/06B32B27/08B32B27/12B32B27/30B32B27/32B32B37/08B32B37/10B32B38/18D04H1/46C08L23/06C08L51/06C08J5/18C08F255/02C08F220/54D04H1/435B29D7/00
CPCB32B5/028B32B3/266B32B27/12B32B27/306B32B27/327B32B27/32B32B27/08B32B5/06B32B37/08B32B37/10B32B38/1816C08J5/18C08F255/026B29D7/00D04H1/435D04H1/46C08J2323/06C08J2423/06C08J2451/06B32B2250/03B32B2250/242B32B2250/40B32B2262/0284B32B2270/00B32B2307/70B32B2307/306B32B2307/714B32B2419/00C08F220/54
Inventor 蔡四良蔡望帆谢朝霞欧阳清
Owner 湖南盛业土工材料制造有限公司
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