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Method for preparing polypropylene fiber earthwork cloth composite drainage net having anti-filtration drainage function

A technology of geotextiles and drainage nets, applied in non-woven fabrics, stretch spinning, rayon manufacturing, etc., can solve the problems of unfavorable stability of roadbed structure, high water content of roadbed soil, and reduced bearing performance of roadbed, etc. High strength, good wicking effect, and the effect of improving load-carrying capacity

Inactive Publication Date: 2017-07-21
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the rainy areas in the south, the hazards of surface water are mainly reflected in the scouring of the roadbed and the retention of precipitation infiltrating into the roadbed soil, resulting in excessive water content in the roadbed soil and reducing the bearing capacity of the roadbed.
In addition, the existence of groundwater is extremely unfavorable to the stability of the roadbed structure, especially when the water level is too high, the uneven settlement of the roadbed will be caused by the rising of capillary water, thus destroying the superstructure

Method used

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  • Method for preparing polypropylene fiber earthwork cloth composite drainage net having anti-filtration drainage function
  • Method for preparing polypropylene fiber earthwork cloth composite drainage net having anti-filtration drainage function
  • Method for preparing polypropylene fiber earthwork cloth composite drainage net having anti-filtration drainage function

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Experimental program
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Effect test

Embodiment 1

[0030] Such as figure 1 As shown, a polypropylene geotextile composite drainage network with reverse filtration and drainage function is composed of upper and lower layers of geotextile 1 and a layer of two-dimensional geotextile core 2. The preparation method is as follows:

[0031] The first step: The high-strength coarse-denier polypropylene geotextile is prepared by spunbonding and needle-punching. The polymer used is isotactic polypropylene with a high melt index, the melt index is 20g / 10min, and the weight-average molecular weight is 35W; the raw material group Points are recorded in weight fractions, high melt index isotactic polypropylene chips 100 parts, antioxidant 1 part, hindered amine light stabilizer Tinuvin7700.5 parts, benzophenone UV absorber C810.5 parts, PP cooling mother Granules A-4903 parts, wherein the antioxidant is prepared by compounding antioxidant 1010 and antioxidant 168, and the compounding ratio is 7:3; the raw materials are evenly mixed and pour...

Embodiment 2

[0035] Such as figure 2 As shown, a polypropylene geotextile composite drainage network with reverse filtration and drainage function is composed of upper and lower layers of geotextile 1 and a layer of three-dimensional geotextile core 3, and its preparation method is as follows:

[0036] The first step: The high-strength coarse-denier polypropylene geotextile is prepared by spunbonding and needle-punching. The polymer used is isotactic polypropylene with a high melt index, its melt index is 30g / 10min, and its weight-average molecular weight is 25W; the raw material group Points are recorded in weight fractions, high melt index isotactic polypropylene slices 100 parts, antioxidant 1.5 parts, hindered amine light stabilizer Tinuvin7700.3 parts, benzophenone UV absorber C810.7 parts, PP cooling mother Granules A-4903 parts, wherein the antioxidant is prepared by compounding antioxidant 1010 and antioxidant 168, and the compounding ratio is 6:4; mix the raw materials evenly and...

Embodiment 3

[0040] Such as figure 2 As shown, a polypropylene geotextile composite drainage network with reverse filtration and drainage function is composed of upper and lower layers of geotextile 1 and a layer of three-dimensional geotextile core 3, and its preparation method is as follows:

[0041] The first step: The high-strength coarse-denier polypropylene geotextile is prepared by spunbonding and needle-punching. The polymer used is isotactic polypropylene with a high melt index, its melt index is 40g / 10min, and its weight-average molecular weight is 15W; the raw material group Points are recorded in weight fractions, high melt index isotactic polypropylene chips 100 parts, antioxidant 0.5 parts, hindered amine light stabilizer Tinuvin7700.7 parts, benzophenone ultraviolet absorber C810.3 parts, PP cooling mother Granules A-4903 parts, wherein the antioxidant is prepared by compounding antioxidant 1010 and antioxidant 168, and the compounding ratio is 5:5; the raw materials are ev...

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Abstract

The invention provides a preparation method of a polypropylene geotextile composite drainage net with reverse filtration and drainage function, which is characterized by comprising: mixing high melt index isotactic polypropylene chips with anti-aging agent and cooling masterbatch and then pouring into the material The silo is fed into the screw extruder. After melting, extrusion, filtration and metering, it is ejected from the spinneret hole. After cooling by side blowing, it enters the drafting system for drafting. Under the action of downward suction, it is evenly adsorbed on the mesh curtain, and then reinforced by pre-needling and main needling to obtain a polypropylene geotextile; the above-mentioned polypropylene geotextile is treated with hydrophobicity on one side to obtain unidirectional water-conducting performance; The polypropylene geotextile with hydrophobic treatment on one side is combined with the geonet core to obtain the polypropylene geotextile composite drainage net with the function of reverse filtration and drainage. The composite of the geotextile with unidirectional water-conducting ability and the geonet core can accelerate the drainage of the water retained in the roadbed and the bottom groundwater.

Description

technical field [0001] The invention belongs to the technical field of geotechnical composite drainage materials, and in particular relates to a polypropylene geotextile composite drainage net with reverse filtration drainage function and a preparation method thereof, and is especially suitable for drainage treatment of roads, railways, tunnels, airport runways and other projects. Background technique [0002] Water is an important factor affecting the pavement structure, the strength and stability of road subgrade itself, and its main forms are surface water and groundwater. In the rainy areas in the south, the hazards of surface water are mainly reflected in the scouring of the roadbed and the retention of precipitation in the roadbed soil, resulting in excessive water content in the roadbed soil and reducing the bearing capacity of the roadbed. In addition, the existence of groundwater is extremely detrimental to the stability of the subgrade structure, especially when th...

Claims

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Application Information

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IPC IPC(8): D04H3/007D04H3/105D01D5/12D04H13/00D01F6/46D01F1/10D06M15/00E01C3/06D06M101/20
CPCD04H3/007D01D5/12D01F1/10D01F1/106D01F6/46D04H3/105D04H13/00D06M15/00D06M2101/20D06M2200/12E01C3/06
Inventor 王先锋缪东洋丁彬俞建勇
Owner DONGHUA UNIV
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