INDUSTRIAL FABRIC

Abstract

An industrial fabric (3) includes a plurality of yarns (31, 32) extending in warp and weft directions and woven into a twill weave structure, which includes 200˜2000 monofilament fibers (311) per inch in either one of the warp and weft directions. A degree of fineness of each monofilament fiber ranges from 50 deniers to 500 deniers. The industrial fabric (3) not only has good strength but also provides excellent water permeability.

Description

CROSS-REFERENCE TO RELATED APPLICATION

This application claims priority of Taiwanese Patent Application No. 99129249 filed on Aug. 31, 2010.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The invention relates to an industrial fabric, more particularly, to an industrial fabric for use in construction spots.

2. Description of the Related Art

Geotextile clothes are usually used in construction and irrigation fields, especially for repairing constructions after natural disasters, and are very much appreciated in the engineering sector. Since the environment for using the geotextile clothes is usually encountered in tough conditions, such as, in many occasions, soil with very big humidity is involved. As such, it is often required that the geotextile clothes must have characteristics of excellent capability of anti-hydrolysis, good mechanical adaptability for humidity, good water permeability, etc.

Referring to FIGS. 1 and 2, a conventional geotextile cloth 1 includes a plurality of warp yarns 11 and a plurality of weft yarns 12. During plain weaving the geotextile cloth 1, each weft yarn 12 crosses the warp yarns 11 by going over one, then under the next and so on. The plain weaving method provides a high strength and firm structure for the geotextile cloth 1, and is the most commonly used weaving method.

However, since the geotextile cloth 1 must fulfill the requirement of high strength and good water permeability, the number of monofilaments for each yarn, or the strength or air holes in each yarn is a key factor that determines whether the geotextile cloth 1 is sufficient to permeate water and to block soil and other debris. Due to the restriction of the weaving method implemented by orthogonal weaving of the warp yarns 11 and the weft yarns 12, the density of the plain weave of the geotextile cloth 1 can be too high to permeate water, or too low to achieve a sufficient strength.

Referring to FIGS. 3 and 4, another conventional geotextile cloth 2 includes a plurality of split film yarns 21 woven along warp and weft directions by plain weaving or twill weaving. Each of the split film yarns 21 is made by splitting a film into a plurality of interconnected monofilaments 211, which are then subjected to a twisting process.

However, the split film monofilaments 211 are flat and the strength thereof is lower than that of the monofilaments shown in FIG. 1. Compared to the geotextile cloth 1 with the same strength, the split film yarn geotextile cloth 2 is heavier, and requires more material for fabrication and more labor for installation.

SUMMARY OF THE INVENTION

An object of the present invention is to provide an industrial fabric that has good strength and good water permeability.

Accordingly, the invention provides an industrial fabric which includes a plurality of yarns extending in warp and weft directions and woven into a twill weave structure, which includes 200˜2000 monofilament fibers per inch in either one of the warp and weft directions. A degree of fineness of each of the monofilament fibers ranges from 50 deniers to 500 deniers.

BRIEF DESCRIPTION OF THE DRAWINGS

Other features and advantages of the present invention will become apparent in the following detailed description of the preferred embodiment with reference to the accompanying drawings, of which:

FIG. 1 is a plan view of a conventional geotextile cloth;

FIG. 2 is a side sectional view of the conventional geotextile cloth in FIG. 1;

FIG. 3 is a plan view of another conventional geotextile cloth;

FIG. 4 is a side sectional view of the conventional geotextile cloth in FIG. 3;

FIG. 5 is a plan view illustrating a first example in the first preferred embodiment of an industrial fabric according to the present invention;

FIG. 6 is a side sectional view of FIG. 5 along line 6-6;

FIG. 7 is a side sectional view of FIG. 5 along line 7-7;

FIG. 8 is a plan view illustrating a second example of the first preferred embodiment;

FIG. 9 is a side sectional view of FIG. 8 taken along line 9-9;

FIG. 10 is a side sectional view of FIG. 8 taken along line 10-10;

FIG. 11 is a plan view illustrating a third example of the first preferred embodiment;

FIG. 12 is a side sectional view of FIG. 11 taken along line 12-12;

FIG. 13 is a side sectional view of FIG. 11 taken along line 13-13;

FIG. 14 is a plan view illustrating a fourth example of the first preferred embodiment;

FIG. 15 is a side sectional view of FIG. 14 taken along line 15-15;

FIG. 16 is a side sectional view of FIG. 14 a taken long line 16-16;

FIG. 17 is a plan view illustrating a fifth example of the first preferred embodiment;

FIG. 18 is a side sectional view of FIG. 17 taken along line 18-18;

FIG. 19 is a side sectional view of FIG. 17 taken along line 19-19;

FIG. 20 is a plan view illustrating a sixth example of the first preferred embodiment;

FIG. 21 is a side sectional view of FIG. 20 along line 21-21;

FIG. 22 is a side sectional view of FIG. 20 along line 22-22;

FIG. 23 is a plan view illustrating a seventh example of the first preferred embodiment;

FIG. 24 is a side sectional view of FIG. 23 taken along line 24-24;

FIG. 25 is a side sectional view of FIG. 23 taken along line 25-25;

FIG. 26 is a plan view illustrating a first example of the second preferred embodiment;

FIG. 27 is a side sectional view of FIG. 26 cut along line 27-27;

FIG. 28 is a side sectional view of FIG. 26 cut along line 28-28;

FIG. 29 is a perspective view illustrating a second example of the second preferred embodiment; and

FIG. 30 is a side sectional view of FIG. 29.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

Before the present invention is described in greater detail with reference to the accompanying preferred embodiment, it should be noted herein that like elements are denoted by the same reference numerals throughout the disclosure.

Referring to FIGS. 5 to 7, an industrial fabric 3 according to the preferred embodiment the present invention made from multiple yarns that include a plurality of multifilament yarns 31 and a plurality of monofilament yarns 32.

The multifilament yarns 31 and the monofilament yarns 32 in this embodiment are made of polymers, such as polypropylene (PP), polyethylene terephthalate (PET), polythene (PE), etc. Each multifilament yarn 31 is made from a plurality of monofilament fibers 311, each of which has a degree of fineness ranging from 50 deniers to 500 deniers. Each monofilament yarn 32 has a single monofilament, and has a degree of fineness ranging from 501 deniers to 2000 deniers.

To weave the industrial fabric 3, the multifilament yarns 31 and the monofilament yarns 32 are arranged along warp and weft directions by twill weaving. A twill weave structure of the yarns 31, 32 may either be a left twill or right twill, and a pattern of one n/1 twill˜n/7 twill, where n ranges from 2 and 7, such as, 2/2, 3/2, 4/2, 5/1, 6/1, 3/7, . . . , etc. Taking the 2/1 twill for example, two warp yarns (multifilament yarn 31 or monofilament yarn 32) cross over one weft yarn (multifilament yarn 31 or monofilament yarn 32).

The twill weave structure of the industrial fabric 3 include 200˜2000 monofilament fibers 311 per inch in either one of the warp and weft directions, and/or 5˜60 monofilament yarns 32 per inch in either one of the warp and weft directions.

There are seven combinations of the monofilament yarns 32 and the multifilament yarns 31:

1. Referring once again to FIGS. 5 to 7, the industrial fabric 3 is a 2/1 twill weave, and includes the monofilament yarns 32 along the warp direction and the multifilament yarns 31 along the weft direction.

2. Referring to FIGS. 8 to 10, the industrial fabric 3 is a 2/1 twill weave, which includes the monofilament yarns 32 along the warp and weft directions and the multi filament yarns 31 along the weft direction.

3. Referring to FIGS. 11 to 13, the industrial fabric 3 is a 2/1 twill weave, which includes the monofilament yarns 32 along the weft direction and the multifilament yarns 31 along the warp direction.

4. Referring FIGS. 14 to 16, the industrial fabric 3 is a 2/1 twill weave, which includes the monofilament yarns 32 along the warp and weft directions and the multifilament yarns 31 along the warp direction.

5. Referring to FIGS. 17 to 19, the industrial fabric 3 is a 2/1 twill weave, which includes the monofilament yarns 32 along the weft direction and the multifilament yarns 31 along the warp and weft directions.

6. As shown again in FIGS. 20 to 22, the industrial fabric 3 is a 2/1 twill weave, which includes the monofilament yarns 32 along the warp direction and the multifilament yarns 31 along the warp and weft directions.

7. Referring to FIGS. 23 to 25, the industrial fabric 3 is a 2/1 twill weave, which includes the monofilament yarns 32 along the warp and weft directions and the multifilament yarns 31 along the warp and weft directions.

Due to the twill weaving used to fabricate the industrial fabric 3, and due to the use of a large amount of the monofilament yarns 32 and/or multifilament yarns 31 and the use of the multifilament yarns 31 including a large number of monofilament fibers 311 to compensate the insufficient strength resulting from the twill weaving, the face side strength of the industrial fabric can reach a strength of 50 kN/m, and the water permeability thereof can amount to 900 litres/m². In comparison with a conventional 25 kN industrial fabric with a water permeability of 111 litres/m², or a conventional 45 kN industrial fabric with 270 litres/m², the industrial fabric 3 can increase the water permeability up to 330% -800%.

Referring to FIGS. 26 to 28, the second preferred embodiment is generally identical to the first preferred embodiment, but differs in that the industrial fabric 3 (2/1 twill) includes a plurality of the multifilament yarns 31 along the warp and weft directions. Each of the multifilament yarns 31 includes a plurality of monofilament fibers 311. Each monofilament fiber 311 has a degree of fineness ranging between 50 deniers and 500 deniers. The industrial fabric 3 includes 200˜2000 monofilament fibers 311 per inch in either one of the warp and weft directions.

Referring to FIGS. 29 and 30, the industrial fabric 3 according to a third preferred embodiment is a 3/1 twill weave which includes a plurality of the multifilament yarns 31 along the warp and weft directions.

While the present invention has been described in connection with what is considered the most practical and preferred embodiments, it is understood that this invention is not limited to the disclosed embodiments but is intended to cover various arrangements included within the spirit and scope of the broadest interpretation so as to encompass all such modifications and equivalent arrangements.

Claims

1. An industrial fabric comprising:

a plurality of yarns extending in warp and weft directions and woven into a twill weave structure, which includes 200˜2000 monofilament fibers per inch measured in either one of the warp and weft directions, a degree of fineness of each of said monofilament fibers ranging from 50 deniers to 500 deniers.

2. The industrial fabric as claimed in claim 1, wherein said twill weave structure includes 5˜60 monofilament yarns per inch measured in either one of the warp and weft directions, a degree of fineness of each of said monofilament yarns ranging from 501 deniers to 2000 deniers.

3. The industrial fabric as claimed in claim 1, wherein said yarns includes a plurality of multifilament yarns and a plurality of monofilament yarns, each of said multifilament yarns having a plurality of said monofilament fibers, each of said monofilament yarns having a single monofilament.

4. The industrial fabric as claimed in claim 3, wherein said multifilament yarns are arranged along the warp direction, and said monofilament yarns are arranged in one of, or both of the weft and warp directions.

5. The industrial fabric as claimed in claim 3, wherein said multifilament yarns are arranged along the weft direction, and said monofilament yarns are arranged along one of, or both of the weft and warp directions.

6. The industrial fabric as claimed in claim 3, wherein said monofilament yarns are arranged along the warp direction, and said multifilament yarns are arranged along both of the weft and warp directions.

7. The industrial fabric as claimed in claim 3, wherein said monofilament yarns are arranged along the weft direction, and said multifilament yarns are arranged along both of the weft and warp directions.

8. The industrial fabric as claimed in claim 3, wherein said monofilament yarns are arranged along both of the weft and warp directions, and said multifilament yarns are arranged along both of the weft and warp directions.

9. The industrial fabric as claimed in claim 1, wherein said yarns include a plurality of multifilament yarn, each of which includes a plurality of said monofilament fibers.

10. The industrial fabric as claimed in claim 1, wherein said twill weave structure has a pattern of one of n/1 twill˜n/7 twill, where n ranges from 2 to 7.

11. The industrial fabric as claimed in claim 1, wherein said yarns are made of polymers.