KR-20260066528-A - Composite Drainage Mat Of Woven And Non-woven Fabrics

Abstract

The present invention relates to a composite mat of a fabric and a nonwoven fabric having horizontal drainage performance, comprising a nonwoven fabric (10) having a constant thickness and width composed of short fibers; and a fabric (20) having a plurality of directional, irregular cross-sectional filament assemblies (21) arranged parallel to each other at regular intervals on one surface of the nonwoven fabric (10), wherein the fabric (20) and the nonwoven fabric (10) are combined.

Inventors

• 유중조

Assignees

• 주식회사 골든포우

Dates

Publication Date

20260512

Application Date

20241104

Claims (4)

1. A nonwoven fabric (10) having a constant thickness and width composed of short fibers; The fabric (20) comprises a plurality of directional, irregular cross-sectional filament assemblies (21) arranged parallel to each other at regular intervals on one surface of the above nonwoven fabric (10). The above fabric (20) and non-woven fabric (10) are combined to form a composite mat of fabric and non-woven fabric with horizontal drainage performance.
2. In paragraph 1, The above-mentioned irregular cross-section filament assembly (21) is a composite mat of fabric and non-woven fabric with horizontal drainage performance, characterized by being replaced with a portion of a general circular polyester filament.
3. In paragraph 1, The above fabric (20) is a composite mat of fabric and non-woven fabric with horizontal drainage performance, characterized in that general circular polyester filament assemblies (25) are arranged at regular intervals in a direction perpendicular to the direction of a plurality of irregular cross-sectional filament assemblies (21).
4. In paragraph 1, A composite mat of fabric and non-woven fabric with horizontal drainage performance, characterized in that some of the plurality of irregular cross-sectional filament assemblies (21) are general circular polyester filament assemblies (23).

Description

Composite Drainage Mat of Woven and Non-woven Fabrics with Horizontal Drainage The present invention relates to a composite mat of a fabric and a non-woven fabric with horizontal drainage properties, and more specifically, to a reinforced composite mat for civil engineering in which a fabric and a non-woven fabric are combined to include an aggregate of irregularly shaped cross-section filaments arranged in the longitudinal direction, which is used as a horizontal drainage channel for water. Civil engineering nonwoven fabrics are installed during tunnel or subway construction to guide drainage and stabilize structures, and during seawall and revetment construction to protect revetment slopes, prevent the loss of fine soil particles, prevent scouring, and stabilize slopes. In addition, it is used in various civil engineering projects, such as by installing it in waste and landfill sites to protect waterproofing sheets and induce pore water drainage, reinforcing the bearing capacity of soft ground to prevent differential settlement when installed on soft ground, and preventing the mixing of fine soil particles while ensuring maximum flow rate when installing blind culverts and perforated pipes. Conventional nonwoven fabrics for civil engineering are composed solely of pure fibers, resulting in low inter-fiber density and excellent permeability for drainage; however, due to the weak bonding between fibers, they have low tensile strength during construction, leading to damage to the nonwoven fabric before the intended structure is built. For example, for the construction of revetment blocks or retaining walls, a non-woven fabric is spread out like a sheet on the area adjacent to the water surface, and then the non-woven fabric is prevented from moving with a wire mesh or wire, and then blocks are stacked in sequence to construct the retaining wall or revetment blocks. In this process, while the non-woven fabric can initially protect the revetment slope from erosion caused by waves, there is a problem where the lower part, which is wet, becomes heavy and stretches easily over time, leading to damage. In addition, when constructed on soft ground, the tensile strength is weak, so damage occurs in which parts are easily torn due to ground uplift, and thus the intended purpose cannot be achieved. As such, conventional nonwoven fabrics for civil engineering may be suitable for the purpose of water permeability, but they face various problems, such as being unsuitable for the construction of structures that require a certain level of tensile strength while maintaining excellent water permeability. Figures 1 and 2 are photographs of a composite mat of fabric and non-woven fabric according to the present invention. Figure 3 is a conceptual diagram of a composite mat of fabric and non-woven fabric according to the present invention. Figure 4 is an electron microscope image of the cross-section of the heterogeneous cross-section filament of the present invention. Preferred embodiments of the present invention will be described in detail below. First, in describing the present invention, specific descriptions of related known functions or configurations are omitted to avoid obscuring the essence of the invention. Terms of degree used herein, such as ‘approximately’ and ‘substantially,’ are used to mean at or near the stated value when inherent manufacturing and material tolerances are presented in the stated meaning, and are used to prevent unscrupulous infringers from unfairly exploiting the disclosed content in which precise or absolute values are mentioned to aid in understanding the invention. Figures 1 and 2 are photographs of a composite mat of fabric (20) and non-woven fabric (10) according to the present invention. The present invention comprises a nonwoven fabric (10) having a constant thickness and width composed of short fibers; and a fabric (20) having a plurality of directional, irregular cross-sectional filament assemblies (21) arranged parallel to each other at regular intervals on one surface of the nonwoven fabric (10). The fabric (20) and non-woven fabric (10) are combined in a structure, and while a warp knitting technique is preferred for the bonding method, it is not limited thereto; needle punching or heat bonding using a low-melting point resin is also possible. It is reasonable for the nonwoven fabric (10) to have sufficient tensile strength properties suitable for use as a drainage composite mat (1) mainly used in civil engineering work. The fabric (20) comprises a plurality of directional irregular cross-sectional filament assemblies (21), and the irregular cross-sectional filaments may include all cross-sectional filaments of shapes other than simple circles, such as elliptical or polygonal. FIG. 4 is an electron microscope image of the cross-section of the irregular cross-sectional filament of the present invention. This is not an example, but any other irregular cross-sectional filament is also