AU2011216272A1 - Industrial fabric - Google Patents

Abstract

INDUSTRIAL FABRIC An industrial fabric (3) includes a plurality of 5 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 10 deniers to 500 deniers. The industrial fabric (3) not only has good strength but also provides excellent water permeability. F IG. 7 3"1 FIG. 5 FIG. 6

Description

1 AUSTRALIA Patents Act 1990 GOLD-JOINT INDUSTRY CO., LTD. COMPLETE SPECIFICATION STANDARD PATENT Invention Title: Industrial fabric The following statement is a full description of this invention including the best method of performing it known to us:- INDUSTRIAL FABRIC The invention relates to an industrial fabric, more particularly, to an industrial fabric for use in construction spots. 5 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 10 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 15 humidity, good water permeability, etc. Referring to Figures 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 20 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 25 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 2 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 5 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 Figures 3 and 4, another conventional geotextile cloth 2 includes a plurality of split film 10 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. 15 However, the split film monofilaments 211 are flat and the strength thereof is lower than that of the monofilaments shown in Figure 1. Compared to the geotextile cloth 1 with the same strength, the split film yarn geotextile cloth 2 is heavier, and requires 20 more material for fabrication and more labor for installation. An object of the present invention is to provide an industrial fabric that has good strength and good water permeability. 25 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 3 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 5 deniers. 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: 10 Fig. 1 is a plan view of a conventional geotextile cloth; Fig. 2 is a side sectional view of the conventional geotextile cloth in Figure 1; Fig. 3 is a plan view of another conventional 15 geotextile cloth; Fig. 4 is a side sectional view of the conventional geotextile cloth in Figure 3; Fig. 5 is a plan view illustrating a first example in the first preferred embodiment of an industrial 20 fabric according to the present invention; Fig. 6 is a side sectional view of Figure 5 along line 6-6; Fig. 7 is a side sectional view of Figure 5 along line 7-7; 25 Fig. 8 is a plan view illustrating a second example of the first preferred embodiment; Fig. 9 is a side sectional view of Figure 8 taken 4 along line 9-9; Fig. 10 is a side sectional view of Figure 8 taken along line 10-10; Fig. 11 is a plan view illustrating a third example 5 of the first preferred embodiment; Fig. 12 is a side sectional view of Figure 11 taken along line 12-12; Fig. 13 is a side sectional view of Figure 11 taken along line 13-13; .10 Fig. 14 is a plan view illustrating a fourth example of the first preferred embodiment; Fig. 15 is a side sectional view of Figure 14 taken along line 15-15; Fig. 16 is a side sectional view of Figure 14 a taken 15 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 Figure 17 taken along line 18-18; 20 Fig. 19 is a side sectional view of Figure 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 Figure 20 along 25 line 21-21; Fig. 22 is a side sectional view of Figure 20 along line 22-22; 5 Fig. 23 is a plan view illustrating a seventh example of the first preferred embodiment; Fig. 24 is a side sectional view of Figure 23 taken along line 24-24; 5 Fig. 25 is a side sectional view of Figure 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 Figure 26 cut 10 along line 27-27; Fig. 28 is a side sectional view of Figure 26 cut along line 28-28; Fig. 29 is a perspective view illustrating a second example of the second preferred embodiment; and 15 Fig. 30 is a side sectional view of Figure 29. Before the present invention is described in greater detail with reference to the accompanying preferred embodiment, it shouldbe notedherein that like elements are denoted by the same reference numerals throughout 20 the disclosure. Referring to Figures 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 25 of monofilament yarns 32. The multifilament yarns 31 and the monofilament yarns 32 in this embodiment are made of polymers, such 6 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 5 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 10 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/I 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 15 the 2/1 twill for example, twowarpyarns (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 20 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: 25 1. Referring once again to Figures 5 to 7, the industrial fabric 3 is a 2/1 twill weave, and includes the monofilament yarns 32 along the warp direction and 7 the multifilament yarns 31 along the weft direction. 2. Referring to Figures 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 5 and the multifilament yarns 31 along the weft direction. 3. Referring to Figures 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. 10 4. Referring Figures 14 to l6, 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 Figures 17 to 19, the industrial 15 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. AsshownagaininFigures20 to22, theindustrial 20 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 Figures 23 to 25, the industrial 25 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 8 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 5 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 3 can reach a strength of 50 kN/m, and the water 10 permeability thereof can amount to 900 litres/M 2 . In comparison with a conventional 25 kN industrial fabric with a water permeability of 111 litres/m 2 , or a conventional 45kN industrial fabric with 270 litres/m 2 , the industrial fabric 3 can increase the water 15 permeability up to 330% - 800%. Referring to Figures 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 20 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 25 fabric 3 includes 200 - 2000 monofilament fibers 311 per inch in either one of the warp and weft directions. Referring to Figures 29 and 30, the industrial 9 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. 5

Claims (11)

1. An industrial fabric comprising: a plurality of yarns extending in warp and weft directions and woven into a twill weave structure, 5 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. 10

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 15 finenessofeachofsaid monofilamentyarns ranging from 501 deniers to 2000 deniers.

3. The industrial fabric . as claimed in Claim 1, wherein said yarns includes a plurality of 20 multifilament yarns and a plurality of monofilament yarns,. each of said multifilament yarns having a plurality of said monofilament fibers 1 each of said monofilament yarns having a single monofilament. 25

4. The industrial fabric as claimed in Claim 3, wherein said multifilament yarns are arranged along the 1)1 warp direction, and said monofilament yarns are arranged in one of, or both of the weft and warp directions.

5 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. 10

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. 15

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. 20

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 25 directions.

9. The industrial fabric as claimed in Claim 1, wherein 12 said yarns include a plurality of multifilament yarn, each of which includes a plurality of said monofilament fibers. 5

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 10 said yarns are made of polymers.