FABRICS HAVING IMPROVED MOISTURE TRANSPORT PROPERTIES

Abstract

The present invention provides a fabric comprising or consisting of: a first yarn comprising a fiber blend of modal and polyester; a second yarn comprising spandex; and a third yam comprising polyester. The polyester in the fiber blend may have a cross-section such as X-shape, M-shape, I-shape, honeycomb-shape, Y-shape, U-shape or O-shape that creates a plurality of spaces along the length of the first yarn that facilitate a capillary action. The modal in the fiber blend may have a cross-section that is substantially rectangular.

Claims

1. A fabric comprising: a first yarn comprising a fiber blend of modal and polyester; a second yarn comprising spandex; and a third yarn comprising polyester, wherein the polyester in the fiber blend has a cross-section that creates a plurality of spaces along the length of the first yarn that facilitate a capillary action

2. The fabric of claim 1, wherein the first yarn consists of a fiber blend of modal and polyester.

3. The fabric of claim 1, wherein the first yarn is a spun yarn.

4. The fabric of claim 3, wherein the spun yarn is a spun yarn of between 40 and 70 single counts.

5. The fabric of claim 4, wherein the spun yarn is a spun yarn of 50 or 60 single counts.

6. The fabric of claim 1, wherein the polyester is present in the fiber blend in an amount between about 70% and about 95% by weight and the modal is present in the fiber blend in an amount between about 1% and about 30% by weight.

7. The fabric of claim 1, wherein the polyester is present in the fiber blend in an amount between about 65% and about 95% by weight and the modal is present in the fiber blend in an amount between about 5% and about 35% by weight.

8. The fabric of claim 1, wherein the polyester is present in the fiber blend in an amount between about 80% and about 90% by weight, and the modal is present in the fiber blend in an amount between about 10% and about 20% by weight.

9. The fabric of claim 8, wherein the polyester is present in the fiber blend in an amount of about 84% by weight and the modal is present in the fiber blend in an amount of about 16% by weight.

10. The fabric of claim 1, wherein the polyester in the fiber blend has a cross-section that is X-shaped, M-shaped, I-shaped, honeycomb-shaped, Y-shaped, U-shaped or O-shaped, thereby creating a plurality of spaces along the length of the first yarn that facilitate a capillary action.

11. The fabric of claim 10, wherein the polyester in the fiber blend has a cross-section that is X-shaped thereby creating a plurality of spaces along the length of the first yarn that facilitate a capillary action.

12. The fabric of claim 1, wherein the modal in the fiber blend has a cross-section that is substantially rectangular.

13. The fabric of claim 1, wherein the polyester and modal in the fiber blend are of staple length.

14. The fabric of claim 1, wherein the first yarn comprises between about 45% and about 75% by weight of the fabric.

15. The fabric of claim 14, wherein the first yarn comprises about 60% to 61% by weight of the fabric.

16. The fabric of claim 1, wherein the second yarn is a filament yarn.

17. The fabric of claim 1, wherein the second yarn comprises or consists of 100% spandex.

18. The fabric of claim 1, wherein the spandex of the second yarn is between about 20-denier and about 70-denier.

19. The fabric of claim 18, wherein the spandex of the second yarn is between about 20-denier and about 30-denier.

20. The fabric of claim 19, wherein the spandex of the second yarn is about 20-denier or about 30-denier.

21. The fabric of claim 1, wherein the second yarn comprises between about 4% and about 12% by weight of the fabric.

22. The fabric of claim 21, wherein the second yarn comprises about 5% by weight of the fabric.

23. The fabric of claim 1, wherein the third yarn is a filament yarn.

24. The fabric of claim 1, wherein the third yarn comprises or consists of 100% polyester.

25. The fabric of claim 1, wherein the polyester of the third yarn is between about 20-denier and about 80-denier.

26. The fabric of claim 25, wherein the polyester of the third yarn is 50-denier.

27. The fabric of claim 1, wherein the third yarn comprises between about 20% and about 50% by weight of the fabric.

28. The fabric of claim 1, wherein the third yarn comprises about 34% to 35% by weight of the fabric.

29. The fabric of claim 1, wherein the second yarn is inter-knitted between the first yarn and the third yarn.

30. The fabric of claim 29, wherein the first, second and third yarns are present as layers.

31. The fabric of claim 30, wherein the first yarn forms a bottom layer, the second yarn forms a middle layer and the third yarn forms a top layer.

32. The fabric of claim 30, wherein the fabric consists of three layers.

33. The fabric of claim 1, wherein the fabric is selected from the group consisting of: a single jersey, pique, a pointelle, double knit, jacquard or terry.

34. A fabric comprising: a bottom yarn which is a spun yarn of 60 single counts comprising or consisting of a fiber blend of about 16% by weight modal and about 84% by weight polyester; a middle yarn which is a filament yarn comprising or consisting of 20-denier 100% spandex; and a top yarn which is a filament yarn comprising or consisting of 50-denier 100% polyester, and wherein the polyester in the fiber blend has a cross-section that is X-shaped, M-shaped, I-shaped, honeycomb-shaped, Y-shaped, U-shaped or O-shaped, thereby creating a plurality of spaces along the length of the bottom yarn that facilitates a capillary action.

35. The fabric of claim 34, wherein the polyester in the fiber blend has an X-shaped cross-section thereby creating a plurality of spaces along the length of the bottom yarn that facilitates a capillary action.

36. The fabric of claim 34, wherein the top yarn comprises about 35% by weight of the fabric, the middle yarn comprises about 5% by weight of the fabric, and the bottom yarn comprises about 60% by weight of the fabric.

37. The fabric of claim 34, which is a single jersey.

38. A fabric comprising: a bottom yarn which is a spun yarn of 60 single counts comprising or consisting of a fiber blend of about 16% by weight modal and about 84% by weight polyester; a middle yarn which is a filament yarn comprising or consisting of 30-denier 100% spandex; and a top yarn which is a filament yarn comprising or consisting of 50-denier 100% polyester, and wherein the polyester in the fiber blend has a cross-section that is X-shaped, M-shaped, I-shaped, honeycomb-shaped, Y-shaped, U-shaped or O-shaped, thereby creating a plurality of spaces along the length of the bottom yarn that facilitates a capillary action.

39. The fabric of claim 38, wherein the polyester in the fiber blend has an X-shaped cross-section thereby creating a plurality of spaces along the length of the bottom yarn that facilitates a capillary action.

40. The fabric of claim 38, wherein the top yarn comprises about 35% by weight of the fabric, the middle yarn comprises about 5% by weight of the fabric, and the bottom yarn comprises about 60% by weight of the fabric.

41. The fabric of claim 38, which is a pique.

42. A fabric comprising: a bottom yarn which is a spun yarn of 60 single counts comprising or consisting of a fiber blend of about 16% modal and about 84% polyester; a middle yarn which is a filament yarn comprising or consisting of 20-denier 100% spandex; and a top yarn which is a filament yarn comprising or consisting of 50-denier 100% polyester, and wherein the polyester in the fiber blend has a cross-section that is X-shaped, M-shaped, I-shaped, honeycomb-shaped, Y-shaped, U-shaped or O-shaped, thereby creating a plurality of spaces along the length of the bottom yarn that facilitates a capillary action.

43. The fabric of claim 42, wherein the polyester in the fiber blend has an X-shaped cross-section thereby creating a plurality of spaces along the length of the bottom yarn that facilitates a capillary action.

44. The fabric of claim 42, wherein the top yarn comprises about 34.5% by weight of the fabric, the middle yarn comprises about 5% by weight of the fabric, and the bottom yarn comprises about 60.5% by weight of the fabric.

45. The fabric of claim 42, which is a pointelle.

46. A fabric comprising: a bottom yarn which is a spun yarn of 50 single counts comprising or consisting of a fiber blend of about 9% modal and about 91% polyester; a middle yarn which is a filament yarn comprising or consisting of 20-denier 100% spandex; and a top yarn which is a filament yarn comprising or consisting of 50-denier 100% polyester, and wherein the polyester in the fiber blend has a cross-section that is X-shaped, M-shaped, I-shaped, honeycomb-shaped, Y-shaped, U-shaped or O-shaped, thereby creating a plurality of spaces along the length of the bottom yarn that facilitates a capillary action.

47. The fabric of claim 46, wherein the polyester in the fiber blend has an O-shaped cross-section thereby creating a plurality of spaces along the length of the bottom yarn that facilitates a capillary action.

48. The fabric of claim 46, wherein the top yarn comprises about 30% by weight of the fabric, the middle yarn comprises about 5% by weight of the fabric, and the bottom yarn comprises about 65% by weight of the fabric.

49. The fabric of claim 46, which is a jersey.

50. An article of clothing or a home textile when produced from the fabric of claim 1.

51. The article of clothing or home textile of claim 50, wherein the clothing is a shirt, singlet, jersey, pyjamas, maillot, fleece, shorts, pants, hood, running hat, skull cap, helmet liner, mask, headband or sock.

52. The article of clothing or home textile of claim 50, wherein the home textile is a towel, bedding, cushion, sofa or furniture.

Description

BRIEF DESCRIPTION OF DRAWINGS

[0086] Embodiments of the invention will now be described by way of example only with reference to the accompanying drawings, in which:

[0087] FIG. 1: Microscopic image with 100× magnification of polyester fibers having an M-shaped cross-section.

[0088] FIG. 2: Microscopic image with 100× magnification of polyester fibers having an I-shaped cross-section.

[0089] FIG. 3: Microscopic image with 100× magnification of polyester fibers having a honeycomb-shaped cross-section.

[0090] FIG. 4: Microscopic image with 100× magnification of polyester fibers having a Y-shaped cross-section.

[0091] FIG. 5: Microscopic image with 100× magnification of polyester fibers having a U-shaped cross-section.

[0092] FIG. 6: Microscopic image with 100× magnification of polyester fibers having an O-shaped cross-section.

[0093] FIG. 7: Microscopic image with 100× magnification of polyester fibers having an X-shaped cross-section.

[0094] FIG. 8: A cross-section of the fiber blend in accordance with one embodiment of the invention showing the X-shaped cross-section of the polyester fibers.

[0095] FIG. 9: A knitted fabric in accordance with one embodiment of the invention in which the second yarn is inter-knitted between the first yarn and the third yarn.

[0096] FIG. 10: A three layer tri-knit pique fabric in accordance with one embodiment of the invention.

[0097] FIG. 11: Microscopic image with 100× magnification of a three layer, tri-knit pique fabric in accordance with one embodiment of the invention.

[0098] FIG. 12: A three layer, tri-knit single jersey fabric in accordance with one embodiment of the invention.

[0099] FIG. 13: Microscopic image with 100× magnification of a three layer, tri-knit single jersey fabric in accordance with one embodiment of the invention.

[0100] FIG. 14: A three layer, tri-knit pointelle fabric in accordance with one embodiment of the invention.

[0101] FIG. 15: Microscopic image with 100× magnification of a three layer, tri-knit pointelle fabric in accordance with one embodiment of the invention.

[0102] FIG. 16: Diagrammatic representation of one embodiment of a three-layer, tri-knit jersey fabric according to the present invention.

[0103] FIG. 17: Microscopic images of one embodiment of a three-layer, tri-knit jersey fabric according to the present invention. (A) Front surface. (B) Edge of front surface. (C) Back surface. (D) Edge of back surface.

DETAILED DESCRIPTION

[0104] In one aspect the present invention provides a fabric comprising or consisting of:

[0105] a first yarn comprising a fiber blend of modal and polyester;

[0106] a second yarn comprising spandex; and

[0107] a third yarn comprising polyester.

[0108] In some embodiments the first yarn may be a spun yarn. The spun yarn may have between about 10 and about 100 single counts, or between about 20 and about 90 single counts, or between about 30 and about 80 single counts, or between about 40 and about 70 single counts, or between about 50 and about 70 single counts, or between about 55 and about 65 single counts, or about 60 single counts.

[0109] The modal may be present in the fiber blend in an amount between about 1% and about 40%, or between about 1% and about 30%, or between about 5% and about 30%, or between about 5% and about 35%, or between about 5% and about 25%, or between about 5% and about 20%, or between about 10% and about 20%, or between about 7.5% and about 20%, or between about 14% and about 18%, or about 16% by weight.

[0110] The polyester may be present in the fiber blend in an amount between about 60% and about 99%, or between about 70% and about 99%, or between about 70% and about 95%, or between about 65% and about 95%, or between about 75% and about 95%, or between about 80% and about 95%, or between about 70% and about 90%, or between about 75% and about 90%, or between about 80% and about 90%, or between about 82% and about 86%, or about 84% by weight. The polyester in the fiber blend may be recycled polyester.

[0111] In one embodiment the polyester may be present in the fiber blend in an amount between about 70% and about 95% by weight and the modal may be present in the fiber blend in an amount between about 1% and about 30% by weight.

[0112] The first yarn may comprise between about 45% and about 75%, or between about 55% and about 65%, or between about 59% and about 61%, or about 60% by weight of the fabric.

[0113] In some embodiments the second yarn is a filament yarn, and may comprise, or consist of 100% spandex. Spandex provides elasticity to the fabric. The spandex of the second yarn may be between about 20-denier and about 70-denier, or between about 15-denier and about 45-denier, or between about 15-denier and about 35-denier, or between about 20-denier and about 40-denier, or between about 20-denier and about 30-denier.

[0114] The second yarn may comprise between about 4% and about 12%, or between about 2.5% and about 10%, or between about 2.5% and about 7.5%, or about 5% by weight of the fabric.

[0115] The third yarn may be a filament yarn, and may comprise or consist of 100% polyester. In some embodiments the polyester of the third yarn may be between about 20-denier and about 80-denier, or between about 30-denier and about 75-denier, or between about 35-denier and about 65-denier, or between about 45-denier and about 55-denier, or between about 47-denier and about 53-denier, or about 50-denier. The polyester may be recycled polyester.

[0116] The third yarn may comprise between about 20% and about 50% by weight, or between about 30% and about 40% by weight, or about 35% by weight of the fabric.

[0117] The first, second and third yarns may be present as layers. In some embodiments the first yarn may form a bottom layer, the second yarn may form a middle layer and the third yarn may form a top layer. When part of an article of clothing, the bottom layer is intended to be in contact with the skin of a wearer. In some embodiments the polyester of the fiber blend may have a cross-section that is X-shaped, M-shaped, I-shaped, honeycombed-shaped, Y-shaped, U-shaped or O-shaped. These cross-sectional configurations create a plurality of spaces along the length of the first yarn (see FIGS. 1 to 8). The plurality of spaces facilitates a capillary action that is capable of drawing liquid, such as perspiration, from the skin of a wearer along the length of the fibers to the top of the bottom layer. The cross-sectional areas may also maximise the surface area of the fibers thereby lowering the drying time of the fabric. In addition, the air permeability of the fibers may also assist in releasing hot air so as to assist in keeping the wearer fresh and cool. Once the perspiration is moved to the top of the bottom layer it moves through the middle layer and then to the top layer where it is radiated to the environment. In these embodiments, the ordinarily hydrophobic polyester fibers are rendered hydrophilic by altering their cross-sectional structure.

[0118] Perspiration present in the space created amongst the polyester fibers may also act as a good heat conductor. As a result, an improved rate of heat extraction is created thereby preventing or minimizing additional perspiration resulting from trapped heat.

[0119] Modal is hydrophilic and therefore assists in drawing perspiration from the skin. The presence of modal may also assist entry of perspiration into the spaces created amongst the polyester fibers. The hydrophilic properties of modal may also cause perspiration to be absorbed and dispersed radially outward, thereby wetting a large area of the bottom layer for an increased rate of transportation of perspiration to the top layer. Because modal is highly hydrophilic, only a relatively small amount (about 15% to 20% for example) may be required in the bottom layer to dramatically increase the rate of perspiration removal from skin. Further advantages associated with inclusion of modal are that it can offset the generally sticky feel of polyester so as to provide a soft/silky feel to the wearer and its dull appearance minimizes unwanted heat reflection to the wearer's skin.

[0120] When the third yarn is present as the top layer the polyester forms a large outer surface thereby allowing perspiration reaching the outer surface to evaporate efficiently, either by moving air or general evaporation. Another advantage of using polyester as the top layer is that it may be easily decorated by a clothing manufacturer.

[0121] In some embodiments the second yarn may be inter-knitted between the first yarn and the third yarn (see FIG. 9).

[0122] Fabrics in accordance with the invention may be prepared by a three-thread knitting method. In some embodiments, the fabric may be prepared by a method comprising the following steps:

[0123] (i) knitting a raw material with a three-thread yarn feeder to obtain a greige fabric comprising the first, second and third yarns;

[0124] (ii) performing stenter finishing on the fabric knitted in (i) at, for example, a machine speed of about 20 to 25 yards and at a temperature of about 190° C. to about 200° C.;

[0125] (iii) dyeing the fabric obtained following step (ii), followed by dewatering and drying through a flat-width fabric dryer; and

[0126] (iv) performing stenter finishing of the fabric obtained following step (iii) at, for example, a machine speed of about 18 yards to 22 yards and at a temperature of about 145° C. to about 155° C. so as to obtain a finished fabric product.

EXAMPLES

Example 1

Preparation of a Three Layer, Tri-Knit Pique Fabric

[0127] A three layer, tri-knit pique fabric having the following composition was prepared: [0128] A top yarn which is a filament yarn made of 50-denier 100% polyester [0129] A middle yarn which is a filament yarn made of 30-denier 100% spandex [0130] A bottom yarn which is a spun yarn of 60 single counts made of a fiber blend comprising 16% by weight modal and 84% by weight polyester, wherein the polyester has an X-shaped cross-section. [0131] The top yarn is 35% by weight of the fabric, the middle yarn is 5% by weight of the fabric and the bottom yarn is 60% by weight of the fabric. [0132] The fabric consists of 86% polyester, 9% modal and 5% spandex.

[0133] The method used to prepare the fabric was as per that described above in paragraph [0084].

[0134] The structure of the fabric is illustrated in FIGS. 10 and 11.

[0135] The water vapour resistance (ISO 11092:2014) of the fabric was tested according to the particulars shown below in Table 1:

TABLE-US-00001 TABLE 1 Fabric Parameter Water vapour resistance conditioning Air temperature 35 ± 0.1° C. Relative humidity 40 ± 3% Conditioning At least 12 hours (fabric ≤5 mm thick) duration Test Air temperature 35 ± 0.1 ° C. conditions Relative humidity 40 ± 3% Air speed 1.0 ± 0.1 m/s (horizontal air flow over fabric surface) Temperature of 35 ± 0.1 ° C. hot plate Orientation of Fabric lied flat across measurement test fabric unit with the side intended to be in contact with the body facing towards the measurement unit

[0136] The results are presented below in Table 2:

TABLE-US-00002 TABLE 2 Fabric specimen Water vapour resistance (R.sub.et) 1 2.57 (m.sup.2 .Math. Pa)/W 2 2.56 (m.sup.2 .Math. Pa)/W 3 2.61 (m.sup.2 .Math. Pa)/W Mean 2.58 (m.sup.2 .Math. Pa)/W

[0137] The drying time of the fabric was determined using American Association of Textile Chemists (AATCC) 199-2013 and the results are shown below in Table 3:

TABLE-US-00003 TABLE 3 Fabric Average drying time Original 188 minutes After 30 washes 192 minutes

[0138] The vertical wicking capability of the fabric was determined using AATCC 197, Option B and the results are shown below in Table 4:

TABLE-US-00004 TABLE 4 Average vertical wicking rate Fabric (inches/10 min.) Original lengthwise 4.8 Original widthwise 4.5 After 30 washes lengthwise 5.3 After 30 washes widthwise 5.2

[0139] The absorbency of the fabric was determined using AATCC 79-14 and the results are shown below in Table 5:

TABLE-US-00005 TABLE 5 Wetting Fabric time (seconds) Original 1.0 After 30 washes 1.0

Example 2

Preparation of a three layer, tri-knit single jersey fabric

[0140] A three layer, tri-knit single jersey fabric having the following composition was prepared: [0141] A top yarn which is a filament yarn made of 50-denier 100% polyester [0142] A middle yarn which is a filament yarn made of 20-denier 100% spandex [0143] A bottom yarn which is a spun yarn of 60 single counts made of a fiber blend comprising 16% by weight modal and 84% by weight polyester, wherein the polyester has an X-shaped cross-section. [0144] The top yarn is 35% by weight of the fabric, the middle yarn is 5% by weight of the fabric and the bottom yarn is 60% by weight of the fabric. [0145] The fabric consists of 86% polyester, 9% modal and 5% spandex.

[0146] The method used to prepare the fabric was as per that described above in paragraph [0084].

[0147] The structure of the fabric is illustrated in FIGS. 12 and 13.

[0148] The water vapour resistance (ISO 11092:2014) of the fabric was tested according to the parameters shown above in Table 1. The results are presented below in Table 6:

TABLE-US-00006 TABLE 6 Fabric Water vapour specimen resistance (R.sub.et) 1 2.149 (m.sup.2 .Math. Pa)/W 2 2.028 (m.sup.2 .Math. Pa)/W 3 2.037 (m.sup.2 .Math. Pa)/W Mean 2.071 (m.sup.2 .Math. Pa)/W

[0149] The drying time of the fabric was determined using AATCC 199-2013 and the results are shown below in Table 7:

TABLE-US-00007 TABLE 7 Average Fabric drying time Original 145.9 minutes After 30 washes 157.0 minutes

[0150] The vertical wicking capability of the fabric was determined using AATCC 197, Option B and the results are shown below in Table 8:

TABLE-US-00008 TABLE 8 Average vertical wicking rate Fabric (inches/10 min.) Original lengthwise 5.0 Original widthwise 5.0 After 30 washes lengthwise 5.3 After 30 washes widthwise 4.9

[0151] The absorbency of the fabric was determined using AATCC 79-14 and the results are shown below in Table 9:

TABLE-US-00009 TABLE 9 Wetting Fabric time (seconds) Original 1.0 After 30 washes 1.0

[0152] The absorbency, drying time, vertical wicking and water vapour resistance of the fabric was compared to a commonly used 100% polyester knitted quick-dry jersey manufactured by Nike . The results of each test are summarised in Table 10.

TABLE-US-00010 TABLE 10 Fabric Test Present invention Nike Absorbency Original 1 second Original 1 second (AATCC 79-14) Drying Time Original 145.9 mins Original 181 mins (AATCC 199-2013) Vertical Wicking Lengthwise: original Lengthwise: original (AATCC 197, 5.0 inch/10 mins 3.8 inch/10 mins OPTION B) Widthwise: original Widthwise: original 5.0 inch/10 mins 4.1 inch/10 mins Water-Vapour Arithmetic Mean: Arithmetic Mean: Resistance (ISO 2.071 (m.sup.2 .Math. Pa)/W 2.26 (m.sup.2 .Math. Pa)/W 11092: 2014)

[0153] The water-vapour resistance test was conducted as set out in Table 11.

TABLE-US-00011 TABLE 11 Specimen Parameters Water-Vapour Resistance Conditioning Air Temperature (35 ± 0.1)° C. Relative Humidity (40 ± 3)% Conditioning Duration 12 Hours (Specimen ≤ 5 mm Thick) Test Test Water-Vapour Resistance Condition Air Temperature (35 ± 0.1)° C. Relative Humidity (40 ± 3)% Air Speed (1.0 ± 0.1) m/s (Horizontal Air Flow Over The Surface Of The Fabric) Temperature Of (35 ± 0.1)° C. Hot Plate Orientation Of Specimen Lied Flat Across The Measurement Until With The Side Test Specimen Normally Facing The Human Body Towards The Measuring Unit.

[0154] It will be seen from the results in Table 10 that the fabric of the present invention is quicker drying, provides better wicking and less vapour resistance compared to the Nike jersey.

[0155] The absorbency and the wicking of the fabric was also compared to the commonly used CLIMACHILL fabric manufactured by Adidas. The results are summarised in Table 12. It will be seen that the fabric of the present invention provides excellent absorbency and wicking, including after multiple washes.

TABLE-US-00012 TABLE 12 Test Fabric of present invention Adidas Climachill Absorbency Original FACE < 1 seconds FACE < 1 seconds (AATCC 79-14) Original BACK < 1 seconds BACK < 1 seconds After 5 washes FACE < 1 seconds FACE 11.28 seconds without detergent After 5 washes BACK < 1 seconds BACK 26.43 seconds without detergent After 10 washes FACE < 1 seconds FACE 12.16 seconds without detergent After 10 washes BACK < 1 seconds BACK 27.15 seconds without detergent Vertical Wicking Original lengthwise 95 mm lengthwise 76 mm (AATCC 197, Original widthwise 80 mm widthwise 99 mm OPTION B) After 5 washes lengthwise 107 mm lengthwise 10 mm without detergent After 5 washes widthwise 109 mm widthwise 15 mm without detergent After 10 washes lengthwise 86 mm lengthwise 18 mm without detergent After 10 washes widthwise 101 mm widthwise 27.5 mm without detergent

Example 3

Preparation of a Three Layer, Tri-Knit Pointelle Fabric

[0156] A three layer, tri-knit pointelle fabric having the following composition was prepared: [0157] A top yarn which is a filament yarn made of 50-denier 100% polyester [0158] A middle yarn which is a filament yarn made of 20-denier 100% spandex [0159] A bottom yarn which is a spun yarn of 60 single counts made of a fiber blend comprising 16% by weight modal and 84% by weight polyester, wherein the polyester has an X-shaped cross-section. [0160] The top yarn is 34.5% by weight of the fabric, the middle yarn is 5% by weight of the fabric and the bottom yarn is 60.5% by weight of the fabric. [0161] The fabric consists of 85% polyester, 10% modal and 5% spandex.

[0162] The method used to prepare the fabric was as per that described above in paragraph [0084].

[0163] The structure of the fabric is illustrated in FIGS. 14 and 15.

[0164] The water vapour resistance (ISO 11092:2014) of the fabric was tested according to the parameters shown above in Table 1. The results are presented below in Table 13:

TABLE-US-00013 TABLE 13 Fabric Water vapour specimen resistance (R.sub.et) 1 2.53 (m.sup.2 .Math. Pa)/W 2 2.56 (m.sup.2 .Math. Pa)/W 3 2.61 (m.sup.2 .Math. Pa)/W Mean 2.57 (m.sup.2 .Math. Pa)/W

[0165] The drying time of the fabric was determined using AATCC 199-2013 and the results are shown below in Table 14:

TABLE-US-00014 TABLE 14 Average Fabric drying time Original 184 minutes After 30 washes 190 minutes

[0166] The vertical wicking capability of the fabric was determined using AATCC 197, Option B and the results are shown below in Table 15:

TABLE-US-00015 TABLE 15 Average vertical wicking rate Fabric (inches/10 min.) Original lengthwise 4.3 Original widthwise 4.4 After 30 washes lengthwise 5.7 After 30 washes widthwise 5.4

[0167] The absorbency of the fabric was determined using AATCC 79-14 and the results are shown below in Table 16:

TABLE-US-00016 TABLE 16 Wetting Fabric time (seconds) Original 1.0 After 30 washes 1.0

Example 4

Preparation and Functional Characteristics of a Three-Layer, Tri-Knit Jersey Fabric

[0168] A three-layer, tri-knit jersey fabric having the following composition was prepared: p1 A top yarn which is a filament yarn made of 50-denier and 36-hole (36F) 100% recycled polyester. The top yarn accounts for 30.4% by weight of the fabric. [0169] A middle yarn which is a filament yarn made of 20-denier 100% spandex. The middle yarn accounts for 4.7% by weight of the fabric. [0170] A bottom yarn which is a spun yarn of 50 single counts (50s) made of a fiber blend comprising 9% by weight of modal and 91% by weight of O-shaped cross-sectioned wicked recycled polyester. The bottom yarn accounts for 64.9% by weight of the fabric. It will be understood that, apart from an O-shaped cross section, different shapes of recycled polyester cross section may be adopted, e.g., M-shaped, I-shaped, Honeycomb-shaped, Y-shaped, U-shaped etc. [0171] The fabric consists of 89% recycled polyester, 6% modal and 5% spandex.

[0172] The method used to prepare the fabric was as per that described above in paragraph [0084]. The structure of the fabric is illustrated in FIGS. 16 and 17.

[0173] Water vapour resistance was tested in accordance with ISO 11092:2014 as set out in Table 17. The mean water vapour resistance (R.sub.et) of the fabric was measured to be 3.69 (m.sup.2.Math.Pa)/W.

TABLE-US-00017 TABLE 17 Air temperature  35 ± 0.1° C. Relative humidity  40 ± 3% Air speed 1.0 ± 0.05 m/s Temperature of  35 ± 0.1° C. hotplate Orientation of Specimens lay flat across the measurement unit test specimen with the surface intended to face the human body towards the measuring unit. Fabric back surface (skin contact surface) was in contact with hotplate.

[0174] The drying time of the fabric was determined in accordance with AATCC TM 199-2018 (Drying temperature 37° C. End point: to the original dry weight of a specimen; measured at 20° C., 65% RH). The results are set out in Table 18.

TABLE-US-00018 TABLE 18 Ave. absorbency 0 s time of face Ave. absorbency 0 s time of back Ave. dry 0.623 g weight: W1 Ave. wet 1.916 g weight: W2 Ave. moisture 207.5% retention Ave. amount of 1.29 mL water applied Ave. average 35 min drying time

[0175] The vertical wicking capability of the fabric was determined in accordance with AATCC 197-2018, Option B. The face side of the fabric was tested, and the results are set out in Table 19.

TABLE-US-00019 TABLE 19 Wicking rate #1 #2 #3 Average (mm/s) Given Lengthwise 77 77 78 77 0.64 time 2 (mm) min Widthwise 68 68 67 68 0.56 (mm) Given Lengthwise 129 130 129 129 0.22 time 10 (mm) min Widthwise 116 116 115 116 0.19 (mm)

[0176] The absorbency of the fabric was determined in accordance with AATCC TM 79-2018 and, on average, the water drop disappeared almost immediately.

[0177] It will be understood that the tri-knit fabric may comprise different compositions and sizes, including those set out in Table 20.

TABLE-US-00020 TABLE 20 Top Middle Bottom Top yarn % Middle yarn % Bottom yarn % Alternative yarn by yarn by yarn by example size weight size weigh size weight Composition i 30 D 24.5% 20 D 5.4% 60 S 70.1% 89% recycled polyester, 6% modal, 5% spandex ii 50 D 34.2% 30 D 6.9% 60 S 58.9% 88% recycled polyester, 5% modal, 7% spandex iii 75 D 39.2% 40 D 7.0% 50 S 53.8% 88% recycled polyester, 5% modal, 7% spandex

[0178] Although the invention has been described with reference to specific embodiments, it will be appreciated by those skilled in the art that the invention may be embodied in many other forms.