A self-venting waterproof membrane and preparation method thereof

A waterproof membrane, self-adhesive technology, applied in chemical instruments and methods, water conservancy projects, other chemical processes, etc., can solve the problems of membrane rupture, water loss, increase project cost, etc., to restore anti-seepage performance, easy construction, Strong self-healing effect of repairing cracks and micro-holes

Active Publication Date: 2016-03-02
河北泰勒铁路器材有限公司
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the process of releasing water after laying, the accumulation of air under the membrane and the extrusion of the air contained in the unsaturated soil by water cause the geomembrane to bulge-inflate. When the gas pressure under the membrane is higher than the load on the membrane in the inflated area, the membrane The body will rupture, resulting in an irreparable leakage area; this leakage will not only cause a large amount of water loss, but also damage the surrounding soil environment due to the rise of regional groundwater
A large number of tests have been carried out for this problem, but the tests are limited to engineering aspects, such as the exhaust system composed of sand ditch, soft permeable pipe, exhaust valve, and vacuum pumping system under the membrane; these methods not only have construction difficulties, The problem of unstable effect, especially the greatly increased project cost

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A self-venting waterproof membrane and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The first step is to prepare the reinforcement lining

[0029] First, singe the polyester filament non-woven geotextile with a specification of 200 g / m2, and control the elongation to 58% for later use.

[0030] The second step is to prepare water-swellable self-adhesive sheet

[0031] First, take 5 parts by weight of natural rubber, 10 parts by weight of water-soluble polyurethane prepolymer and 80 parts by weight of natural sodium bentonite, 1 part by weight of white wax oil as softener, 1 part by weight of petroleum The resin is used as a thickener, 1 part by weight of porogen functional filler and 0.5 part by weight of anti-aging agent D are sequentially added to the internal mixer, mixed at 140 ° C for 15 minutes, and then filtered by a rubber filter; then, Add the filter gel into the preheated screw extruder to extrude into a water-swellable self-adhesive sheet with a thickness of 3 mm;

[0032] The third step compound

[0033] The water-swellable self-adhesive...

Embodiment 2

[0036] The first step is to prepare the reinforcement lining

[0037] First, the polyester filament non-woven geotextile with a specification of 300g / square meter is singed, and the elongation is controlled to 50%, and it is set aside.

[0038] The second step is to prepare water-swellable self-adhesive sheet

[0039] First, get 10 parts by weight of butyl rubber, 5 parts by weight of water-soluble polyurethane prepolymer and 70 parts by weight of calcium-based bentonite, 1.5 parts by weight of pine tar as softener, 1.5 parts by weight of rosin Make a thickener, 1.5 parts by weight of porogen functional filler and 2.0 parts by weight of anti-aging agent 4010A, sequentially add to the internal mixer, mix at 110 ° C for 25 minutes and filter the rubber with a rubber filter; then, put The filter gel is added to the preheated screw extruder and extruded into a water-swellable self-adhesive sheet with a thickness of 3.5 mm;

[0040] The third step compound

[0041] The water-swe...

Embodiment 3

[0044] The first step is to prepare the reinforcement lining

[0045] First, the polyester filament non-woven geotextile with a specification of 350 g / m2 is singed, and the elongation is controlled to 45%, and it is set aside.

[0046] The second step is to prepare water-swellable self-adhesive sheet

[0047] First, take 8 parts by weight of nitrile rubber that has been masticated, 20 parts by weight of sodium acrylate polymer water-absorbing resin and 30 parts by weight of sodium bentonite, 0.5 parts by weight of naphthenic oil as a softener, 1.5 parts by weight of Rosin is used as a thickener, 1.5 parts by weight of porogen functional filler and 1.5 parts by weight of anti-aging agent D are sequentially added to the internal mixer, mixed at 130°C for 20 minutes, and then filtered by a rubber filter; then, Add the filter glue to a preheated screw extruder to extrude into a water-swellable self-adhesive sheet with a thickness of 4.0 mm;

[0048] The third step compound

[0...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
hydrostatic pressureaaaaaaaaaa
elongationaaaaaaaaaa
elongationaaaaaaaaaa
Login to view more

Abstract

The invention belongs to the technical field of seepage-proof material, and particularly discloses an independent air-exhaust type waterproof film and a preparation method thereof. The waterproof film with the technical scheme is characterized in that an independent air-exhaust type water-swelling and self-adhering sheet layer which consists of natural or synthetic rubber, high-polymer water-absorbing resin, inorganic water-absorbing material and functional filler is covered on polyester long-yarn non-woven geotextile reinforcing layers at the two sides, and then the steps of compounding, cutting, detection, package and the like are carried out, so as to prepare the independent air-exhaust type waterproof film which is widely applied to underground waterproof and seepage-proof construction sites of water conservancy projects, such as artificial lakes, reservoirs and landscape rivers. The independent air-exhaust type waterproof film has the advantages that the seepage-proof effect is good, the independent air exhaust is realized, the construction is simple, the environment-friendly effect is good, and the service life is long.

Description

technical field [0001] The invention belongs to the technical field of anti-seepage materials, and specifically discloses a self-exhausting and waterproof membrane used in underground waterproof and anti-seepage construction sites of water conservancy projects such as artificial lakes, reservoirs, and landscape rivers, and a preparation method thereof. Background technique [0002] There are waterproof and anti-seepage problems in water conservancy projects, such as the construction of artificial lakes and landscape rivers. In terms of anti-seepage, anti-seepage membranes, such as polyethylene geomembranes and composite geomembranes, are generally laid. In the process of releasing water after laying, the accumulation of air under the membrane and the extrusion of the air contained in the unsaturated soil by water cause the geomembrane to bulge-inflate. When the gas pressure under the membrane is higher than the load on the membrane in the inflated area, the membrane The bod...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Patents(China)
IPC IPC(8): B32B33/00E02B3/16B32B37/15C09K3/12
Inventor 张广强王志
Owner 河北泰勒铁路器材有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap