Preparation method of same-position different-fineness polyester filament geotextile

A technology of different denier and filament soil, which is applied in the field of preparation of polyester filament geotextiles with different denier at the same position, can solve the problems of large cloth thickness, high elongation at break, and high rigidity of the cloth surface, and achieve reduced manufacturing costs and high elongation at break. High elongation rate and simple manufacturing process

Inactive Publication Date: 2018-04-20
DALIAN HUAYANG NEW MATERIALS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the monofilament fineness of polyester filament geotextiles sold in the market is basically the same, and the change of monofilament fineness has a great impact on the physical properties of geotextiles.
The advantages of filament geotextiles with high monofilament denier are: under the unit area, the cloth surface has high rigidity, high tensile strength and bursting strength; the disadvantages are: under the unit area, the cloth thickness is large, and the cloth surface uniformity is poor. Poor water permeability, low elongation at break
The advantages of filament geotextiles with small monofilament denier are: under the unit area, the cloth thickness is small, the cloth surface is uniform, the water permeability is good, and the elongation at break is high; the disadvantages are: the cloth surface is soft, tensile strength and bursting low strength
The most obvious example of the application of different denier fiber nonwovens is the well-known SMS spunbonded nonwovens, but the whole spinning process is different from the process of polyester filament geotextiles. This process is more complicated and the product uses are different.

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
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  • Preparation method of same-position different-fineness polyester filament geotextile

Examples

Experimental program
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preparation example Construction

[0016] The preparation method of the isotropic denier polyester filament geotextile of the present invention, the steps are as follows: After the same polyester chip is dried, it is melted and extruded by the same extruder, filtered, entered into the same spinning box, and passed through the same spinning assembly The same spinneret on the same spinneret with different diameter spinneret holes is extruded to obtain melt filaments, which are cooled by a side blowing device, drawn by a tubular air flow, and laid on a wire, and then the fiber web is needled and consolidated, wound, and cut. side, automatic doffing to obtain isomorphic polyester filament nonwoven fabric, that is, isomorphic polyester filament geotextile. Different denier polyester filaments have two types of different denier control, the monofilament denier ratio is 1.5-3, and the monofilament denier is 1.5-8dpf. The high denier fibers are included and the low denier fibers are outside, arranged in concentric circl...

example 1～3

[0019] The conventional polyester filament spunbond geotextile preparation process is adopted. After the polyester chips are dried, they enter the screw extruder, are filtered, enter the spinning box, and pass through the same nozzle on the same component on the same spinning box. Plates get melt streams of different thicknesses. Cooling by side blowing device, drafting by tubular airflow, laying the web with spinning yarns, then needle-punching and consolidating the web, winding, trimming, and automatic doffing to obtain the isomorphic denier polyester filament nonwoven fabric. The filament fineness and blending ratio that each example adopts are shown in Table 1, and the relevant preparation process conditions of each example are shown in Table 2.

[0020] Table 1

[0021]

[0022] Table 2

[0023] .

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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Abstract

The invention discloses preparation method of same-position different-fineness polyester filament geotextile. The preparation method comprises the following steps that a same kind of polyester slicesare dried, fused and extruded out by a same extruding machine and filtered, enter a same spinning box body, and are extruded out through different-hole-diameter spinneret orifices in a same spinneretplate on a same spinning assembly to obtain melting thin filaments, the melting thin filaments are cooled through a side blowing device and drafted by pipe-type air flow, yarn arraying and net layingare conducted, then a fiber net is subjected to needling, solidification, winding and trimming, and automatic doffing is conducted to obtain a same-position different-fineness polyester filament non-woven fabric, namely the same-position different-fineness polyester filament geotextile. The preparation method of the same-position different-fineness polyester filament geotextile has the advantagesthat the thickness of the geotextile under the unit area is correspondingly reduced, and the geotextile is good in cloth cover uniformity, high in water permeability, high in breaking elongation rateand high in tensile strength and bursting strength.

Description

technical field [0001] The invention relates to a method for preparing a geotextile, in particular to a method for preparing a geotextile made of polyester filaments with different deniers. Background technique [0002] Geotextiles have excellent functions of filtration, drainage, isolation, reinforcement, anti-seepage and protection, and have been widely used in geotechnical projects such as water conservancy, electric power, mines, roads and railways. Among them, polyester filament geotextiles quickly occupy the geotextile market because of their light weight, high tensile strength, good water permeability, aging resistance, and corrosion resistance. At this stage, the monofilament fineness of polyester filament geotextiles sold in the market is basically the same, and the change of monofilament fineness has a great impact on the physical properties of geotextiles. The advantages of filament geotextiles with high monofilament denier are: under the unit area, the cloth sur...

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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Application Information

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Patent Type & AuthorityApplications(China)
IPC IPC(8): D04H3/016D04H3/011D01D13/00D04H3/03D04H3/105
Inventor曾世军高娜张春苗邓春久蒙英志
OwnerDALIAN HUAYANG NEW MATERIALS TECH CO LTD