Special polypropylene filament needle-punched drainage geotechnical cloth for tunnels, preparation method and preparation system

A polypropylene, soil-draining technology, used in needle punching machines, stretch spinning, non-woven fabrics, etc., can solve the problems of poor mechanical properties, hydraulic properties and chemical resistance of non-woven fabrics, loss of protective geomembrane It is difficult to achieve problems such as water permeability and drainage, and achieve good hydraulic performance, good drainage capacity and water permeability, and the effect of reducing monofilament breakage.
CN112853624AActive Publication Date: 2021-05-28TIANDINGFENG POLYPROPYLENE MATERIAL CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
TIANDINGFENG POLYPROPYLENE MATERIAL CO LTD
Publication Date
2021-05-28

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Abstract

The invention aims to provide special polypropylene filament needle-punched drainage geotechnical cloth for tunnels, a preparation method and a preparation system. The preparation method comprises the following steps: preparing polypropylene fibers by adopting a melt spinning process; adopting at least three traction devices which are sequentially arranged at intervals for conducting traction stretching on the polypropylene fibers, and thus obtaining stretched fibers, wherein the traction speeds of the sequentially arranged traction devices are sequentially increased, and the fineness of the fibers ranges from 13 dtex to 16 dtex; sequentially carrying out a yarn swaying and lapping process, a lubricating and reinforcing process and a tentering and setting process on the stretched fibers, and then obtaining the polypropylene filament needle-punched drainage geotechnical cloth. Through the design of the preparation method of the polypropylene filament needle-punched drainage geotechnical cloth, the technical problems that in the prior art, conventional non-woven cloth is poor in mechanical property, hydraulic property and chemical resistance, water permeation and drainage effects are difficult to achieve, the effect of protecting a geomembrane plate is lost, and the engineering life is affected are solved.
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Description

technical field

[0001] The invention relates to the technical field of geotextile preparation, in particular to a polypropylene filament needle-punched drainage geotextile for tunnels, a preparation method and a preparation system. Background technique

[0002] Tunnel engineering has strict requirements on waterproofing. If water leaks in the tunnel, it will not only reduce the durability of the lining concrete, but also reduce the functions of various facilities in the tunnel and deteriorate the environment in the tunnel. When tunnels are excavated in mountains or strata with complex hydrogeology, in order to prevent groundwater from seeping into the cave, geotechnical templates and non-woven fabrics are often laid between the primary support and the secondary lining. The non-woven fabrics can protect the geotechnical templates from being pierced. Breaking, eliminating the role of groundwater infiltrating the initial support concrete.

[0003] Conventional non-woven fabric...

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
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