KR101851903B1 - Textile geogrid - Google Patents

Abstract

The present invention relates to a method of manufacturing a net structure comprising a plurality of lattices formed by allowing a plurality of warp part comprising warps to cross a weft part comprising a plurality of wefts. The warp part is formed by weaving yarns having different heat shrinkage ratios so that chain-shaped rings are successively knotted. The weft part has a gap formed by allowing a plurality of wefts in a unit lattice to cross each other. The net structure is shrunk by heat treatment after fabrication. A step of forming the covering of a resin coating solution can be omitted. A fabrication process is simple. Structure is more robust. The reinforcement of the ground is strengthened.

Description

Textile Geogrid {TEXTILE GEOGRID}

TECHNICAL FIELD The present invention relates to a textile geogrid, and more particularly, to a textile geogrid having a knit fabric structure capable of omitting a coating process of a resin coating liquid.

Generally, geogrids are reinforcing materials used for reinforcing retaining walls, slope reinforcement, embankment reinforcement, and asphalt reinforcement in civil works.

Geogrid is required to have high tensile strength and low tensile strain for its application in addition to characteristics such as internal construction and friction characteristics.

Geogrid can be divided into plastic geogrid and textile geogrid depending on the manufacturing method and materials.

Plastic geogrids are generally produced by passing a polymer sheet passed through an extruder through a roller, punching it in the form of a lattice grid, and stretching it uniaxially or biaxially.

However, such a plastic geogrid has a problem that the creep deformation occurs largely when a load is applied for a long time due to the characteristics of the material, the tensile strength is reduced, and the stability of the reinforced structure is deteriorated.

As shown in FIG. 1, the textile geogrid 102 is formed by supplying a high-tenacity polyester fiber in the direction of the weft yarns 106 and 104 to form a lattice-like fabric. In order to provide shape stability and durability, And is coated with a resin coating liquid such as an acrylic resin, an acrylic resin, an acrylic resin, an acrylic resin, a latex, and a rubber resin.

Textile geogrids 102 are economical in terms of manufacturing cost compared to plastic geogrids, have excellent tensile and creep characteristics, and are flexible in terms of their packaging, transportation and construction.

However, the textile geogrid 102 has a disadvantage in that it is complicated and requires a long time to form a coating of the resin coating liquid, and dioxin is discharged from the resin coating liquid, so that it is not environmentally friendly when applied to the soil.

 In addition, such a textile geogrid has disadvantages that the warpage 106 of the radial ribs constituting the grid during use is widened, the reinforcing effect is lowered, and the workability is lowered compared with the plastic geogrid.

In the embodiment of the present invention, instead of omitting the step of forming the coating of the resin coating liquid, the fabrication process is simple and more robust by woven with knitted fabric and heat-treated, and the frictional force with the ground is increased, So as to provide a geogrid having no separation phenomenon.

According to one or more embodiments of the present invention, in a textile geogrid, a mesh structure is formed by crossing a warp portion formed of a plurality of weft yarns and an inclined portion formed of a plurality of warp yarns to form a mesh structure composed of a plurality of warp yarns, A plurality of warp yarns are staggered to form voids in the unit lattice, and the net web is shrunk by heat treatment after being manufactured. To provide a textile geogrid.

Here, the staple portion is formed by folding polypropylene yarn and polyester yarn. Through the heat treatment, the polyester yarn can be protruded relative to the polypropylene yarn to form a protruding portion.

Here, the inclined portion may be formed of polypropylene yarn, and at least two pairs of inclined portions may be arranged alternately.

Here, the upper thread portion may protrude from the inclined portion.

Here, the weft yarn part is manufactured by weaving a plurality of weft yarns with a knotting knot, and the weft yarn part may be knitted with a knotting knot in the inclined part.

Here, the mesh structure can be heat-treated at 130 to 180 DEG C in a tenter.

The embodiment of the present invention has the effect of omitting the step of forming the coating of the resin coating liquid, simplifying the manufacturing process and making it economical, and eco-friendly because the resin coating liquid is not used.

In addition, through the heat treatment after the knitted fabric is manufactured, the weft yarn and the warp yarn are firmly pressed, the weft yarn is projected more than the warp yarns, There is an effect that strengthens the strength.

Also, the arrangement of the warp yarns is formed so as to increase the porosity, so that the soil layer at the upper and lower parts of the geogrid is integrated, thereby improving the characteristics as a reinforcing material without causing separation phenomenon.

1 is a plan view of a textile geogrid according to the prior art.
2 is a plan view of a textile geogrid according to an embodiment of the present invention.
3 is a detailed view of a textile geogrid according to an embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

The textile geogrid 2 according to the embodiment of the present invention is manufactured by firmly manufacturing the textile geogrid 2 with a knitted fabric instead of omitting the step of forming the covering of the resin coating liquid and firmly fixing the same by heat treatment to simplify the manufacturing process.

FIG. 2 is a plan view of a textile geogrid according to an embodiment of the present invention, and FIG. 3 is a detailed view of a textile geogrid according to an embodiment of the present invention.

The textile geogrid 2 according to the embodiment of the present invention shown in FIGS. 1 and 2 comprises a warp yarn 4 formed of a plurality of weft yarns 8 and an inclined yarn 6 formed of a plurality of warp yarns 14 ) Are crossed to form a mesh structure composed of a plurality of grids.

The upper thread portion 4 is formed by weaving the weft yarns 8 and 10 such that chain-like rings are successively knotted. The weft yarns (8) and (10) of the warp yarns (4) are formed by folding yarns having different heat shrinkage ratios. In the embodiment of the present invention, polyester yarns and polypropylene yarns can be folded.

In this case, since polyester yarn is more expensive than polypropylene yarn, the yarn can be yarn-folded at a relatively low content rate.

The polyester yarn has a relatively smaller heat shrinkage rate than the polypropylene yarn so that the polyester yarn can protrude after the thermal processing to form the protruding portion 12 on the upper thread portion 4. [

The projecting portion 12 has an effect of increasing the frictional force with the ground and strengthening the reinforcement of the ground.

The upper thread portion 4 can be produced by twisting polyester yarn and polypropylene yarn as described above and knitting into an impact knot.

The striking knot has the effect of strengthening the mesh structure and improving the workability.

The wiggle portion 4 is also woven into the inclined portion 6 with a knotting knot so that the wiggle portion 4 and the inclined portion 6 are prevented from being pushed together and held in position.

The inclined portion 6 is formed such that a plurality of warp yarns 14 are alternately manufactured to form a gap R1 for each unit lattice of the net web and then a pair of warp yarns 14 Are arranged in a pair so as to firmly construct the mesh structure and increase the porosity.

The increase of the porosity of the mesh structure has the effect of improving the characteristics as a reinforcing material that does not cause separation phenomenon by integrating the soil layers at the upper and lower parts of the textile geogrid (2).

The inclination 14 of the inclined portion 6 may be formed of polypropylene yarn.

In the textile geogrid 2 according to the embodiment of the present invention, the slant portion 6 and the upper slant portion 4 intersect with each other to form a mesh structure, and then the slant portion 6 and the upper portion 4 are heat treated at 130 to 180 캜 in a tenter.

The textile geogrid 2 according to the embodiment of the present invention is firmly fixed while being subjected to heat treatment. Heat treatment can adjust the heat treatment intensity within 130 ~ 180 ℃.

If the temperature of the tenter falls below the lower limit value within the above range, the texture of the textile geogrid 2 is inferior due to the softness of the structure, and if the upper limit is exceeded, the textile geogrid 2 shrinks by 50% .

The polypropylene yarn that is susceptible to heat shrinks and the polyester yarn having excellent heat resistance protrudes relatively more than the inclined portion 6 while being subjected to the heat treatment The formation of the plurality of protrusions 12 increases the frictional force with the ground, thereby strengthening the reinforcement of the ground.

With the above-described structure, the textile geogrid 2 according to the embodiment of the present invention can variously adjust the size and shape of the unit grid. Further, the topsheet 4 and the slopes 6 are not pressed and are sufficiently rigid without being coated with a resin coating solution to impart shape stability and durability.

In addition, it is advantageous in that a textile geogrid 2 having a higher cost-effective polypropylene yarn can be produced more economically than an artificial geogrid of the prior art which is formed only from a polyester yarn having a high price.

While the present invention has been described with reference to exemplary embodiments, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, And all changes to the scope that are deemed to be valid.

2: Geogrid 4: The upper part
6: slope part 8,10: weft
12: protrusion 14: incline
R1, R2: air gap

Claims (6)

In textile geogrids,
And a plurality of warp yarns formed by a plurality of weft yarns and a plurality of warp yarns formed by a plurality of warp yarns are crossed,
Wherein the warp yarns are formed by weaving yarns having different heat shrinkage ratios so that chain-shaped rings are successively knotted, wherein the warp yarns form a gap by mutually shifting a plurality of warp yarns in a unit lattice, Characterized in that it is shrunk by heat treatment. The method according to claim 1,
Wherein the upper thread portion is formed by folding polypropylene yarn and polyester yarn,
Wherein the polyester yarn is relatively protruded from the polypropylene yarn through heat treatment to form protrusions. The method according to claim 1,
Wherein the inclined portion is made of polypropylene yarn,
Wherein at least two pairs of slopes are arranged alternately. The method according to claim 1,
Wherein the upper portion is protruded relative to the inclined portion. The method according to claim 1,
Wherein the weft yarn is manufactured by weaving a plurality of weft yarns into an impact knot,
Wherein the weft yarn is weaved by a knot in the inclined portion. The method according to claim 1,
Wherein the mesh structure is heat treated at 130 to 180 DEG C in a tenter.

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