UV-A AND UV-B PERMEABLE FABRIC

Abstract

A fabric having particularly good translucent properties with regard to UVA and UVB radiation, in particular for use in garments for the sport and leisure sector, with the transparency being reduced at the same time. The fabric comprises a first yarn made of cellulose-based fiber or regenerated fiber, and a second yarn made of polymer fiber. The proportion by weight of the first and second yarns is at least 80% by weight. The wale density is in the range from 10 to 30 per cm and the course density is in the range from 15 to 33 per cm. The second yarn has a fineness in the range from 45 to 300 dtex and the first yarn has a fineness in the range from 150 to 300 dtex. The grammage of the fabric is between 70 and 150 g/m{circumflex over ( )}2.

Claims

1. A fabric comprising at least one first yarn and at least one second yarn, said at least one first yarn comprising at least one regenerated fiber or cellulose-based fiber, and said at least one second yarn comprising at least one polymer fiber and wherein the proportion by weight of the at least one first yarn and the at least one second yarn together is at least 80% by weight, based on the total weight of the fabric, and wherein the wale density of the fabric is in the range from 10 to 30 per cm and the course density of the fabric is in the range from 15 to 33 per cm, and wherein the at least one second yarn has a fineness in the range from 45 to 300 dtex and wherein the grammage of the fabric is between 70 and 150 g/m{circumflex over ( )}2 and wherein the at least one first yarn has a fineness in the range from 150 to 300 dtex.

2. The fabric according to claim 1, wherein the fabric exclusively comprises cellulose-based fibers, regenerated fibers or polymer fibers, or any combination thereof.

3. The fabric according to claim 1, wherein the wale density of the unshrunk fabric is in the range of 10 to 30 per cm or the course density of the unshrunk fabric is in the range of 15 to 33 cm, or any combination thereof.

4. The fabric according to claim 1, wherein the at least one first yarn is dyed, or the at least one second yarn does not contain any pigmentation or optical brighteners.

5. The fabric according to claim 1, wherein the fabric consists exclusively of the at least one first yarn and the at least one second yarn or wherein the fiber content of the cellulose-based fiber or regenerated fiber in the at least one first yarn is at least 90% based on the total fiber content of all the fibers of the at least one first yarn, or wherein the fiber content of the polymer fiber in the at least one second yarn is at least 90% by weight based on the total fiber content of all the fibers of the at least one second yarn, or wherein the at least one second yarn comprises at least 80% by weight polymer.

6. The fabric according to claim 1, wherein the proportion by weight of the at least one first yarn is at least 30% by weight and at most 70% by weight based on the total weight of the fabric, and the proportion by weight of the at least one second yarn is at least 30% by weight and at most 70% by weight based on the total weight of the fabric, and wherein the ratio of the at least one second yarn relative to the at least one first yarn is at least 1 and at most 3.

7. The fabric according to claim 1, wherein the fabric has a transmittance of UVB rays or UVA rays, or both UVB and UVA rays of at least 20% or wherein the fabric has a UV protection factor (USF) and Ultraviolet Protection Factor (UPF), determined according to the Australian/New Zealand Standard 4399:1996 for sun protecting clothing evaluation and classification (AS/NZS4399: 1996) in the range from 1.5 to 5.

8. The fabric according to claim 1, wherein the fabric has a piqué or jacquard weave

9. The fabric according to claim 1, wherein the fabric is a knitwear.

10. A garment comprising a fabric according to claim 1.

11. The fabric according to claim 2, wherein the at least one second yarn is a multifilament and wherein the grammage of the fabric is between 90 and 130 g/m{circumflex over ( )}2, or wherein the at least one first yarn is a monofilament, or any combination thereof.

12. The fabric according to claim 3, wherein the wale density of the fabric, shrunk or when moist, or both, is in the range from 10 to 30 per cm, and the course density of the fabric, shrunk or when moist, or both, is in the range from 15 to 33 per cm, or a combination of said wale density and course density.

13. The fabric according to claim 4, wherein the fabric has a degree of optical covering of at least 40% or a maximum of 90%, or both.

14. The fabric according to claim 5, wherein the at least one second yarn comprises at least 80% by weight polyamide or polyester and comprises less than 10% by weight additives, and the at least one second yarn contains less than 10% by weight pigmentation or optical brighteners.

15. The fabric according to claim 8, wherein the at least one first yarn and the at least one second yarn form the jacquard pattern.

16. The fabric according to claim 1, wherein the fabric is a knitted fabric.

17. The fabric according to claim 1, wherein the fabric is a piqué or jacquard knitted fabric.

18. The fabric according to claim 1, wherein the fabric is a jacquard jersey knitted fabric.

19. The fabric according to claim 1, wherein the fabric is a knitted fabric having a first plurality of stitches and a second plurality of floats or handles, wherein the second plurality of floats or handles is 10 to 35%, of the sum of the first and second pluralities, or wherein the fabric has handles or floats and the handles or floats are present in 40 to 60% of the wales, or the handles or floats are present in 20 to 60% of the courses.

Description

[0038] Some aspects contributing to an understanding of the invention will be illustrated below with the aid of purely exemplary explanations that do not limit the invention. This is done using purely schematic figures. In the figures:

[0039] FIG. 1 shows UV transmission values of different fabrics

[0040] FIG. 2 shows a piqué weave pattern

[0041] FIG. 3 shows views of a fabric according to the invention

[0042] FIG. 4 shows a jacquard weave pattern

[0043] FIG. 5 shows views of a material according to the invention

[0044] FIG. 6 shows an outline of a test arrangement for determining the degree of the optical covering.

[0045] FIG. 1 shows the transmission in percent of four different knitted fabrics over the UV-A and UV range. The wavelength of the light in nm is indicated on the horizontal axis. The four measured knitted fabrics, denoted by numbers 1 to 4 from top to bottom in FIG. 1, are those shown in Table 1.

TABLE-US-00001 TABLE 1 First Course No. yarn Second yarn Wale density density Grammage Dyeing Weave 1 Lyocell PA 6.6 110f34 10/cm 17/cm   97 g/m2 undyed piqu ring yarn dtex no matting Ne 30/1 2 Cotton PA 6.6 110f34 10/cm 16/cm  92.9 g/m2 undyed piqu Nm 55/1 dtex no matting 3 Lyocell PA 6.6 110f34 13/cm 19/cm 117.5 g/m2 First jacquard ring yarn dtex no matting yarn Ne 30/1 dyed 4 Lyocell PA 6.6 110f34 13/cm 22/cm   128 g/m2 First jacquard ring yarn dtex no matting yarn Ne 30/1 dyed

[0046] FIG. 2 shows an illustration of the weaves of the fabrics of Nos. 1 and 2 of Table 1. The weaves in the width of the fabric are shown from left to right, only one repeat being shown and this sequence often being repeated over the width of the fabric. The longitudinal direction of the fabric extends from bottom to top. The weave sequence shown is repeated in the longitudinal direction of the fabric. In the depiction:

TABLE-US-00002   X means stitch of the first yarn {circumflex over ( )} means loop of the first yarn Y means stitch of the second yarn

[0047] FIG. 3 shows a plan view of the front (left figure) and back (right figure) of the fabric according to the invention of No. 2 of Table 1 on a black background.

[0048] FIG. 4 shows an illustration of the weaves of the fabrics of Nos. 3 and 4 of Table 1. The weaves in the width of the fabric are shown from left to right, with only one pattern repeat being shown and this sequence often being repeated over the width of the fabric. The longitudinal direction of the fabric extends from bottom to top. The weave sequence shown is repeated in the longitudinal direction of the fabric. In the depiction:

TABLE-US-00003   X means stitch of the first yarn Y means stitch of the second yarn — Float

[0049] FIG. 5 shows a black and white plan view of the front (left figure) and back (right figure) of the fabric according to the invention of No. 3 of Table 1 on a black background.

[0050] FIG. 6 shows a schematic structure of a test arrangement by means of which the degree of the optical covering can be determined.

[0051] A container 1 is shown in which a paper 2 with a grid applied to a surface (not visible) is arranged on the bottom and a fabric 3 is arranged over the paper. On the top in the interior of the container, a light source 4 on the one hand and a camera 5 on the other hand are arranged next to one another at a distance 6 from the fabric of 50 cm. However, a different distance is also conceivable.

[0052] The light source 4 has a luminous flux of 1400 lumens. In a successful experiment of this test arrangement, a daylight lamp from Elgato of the “Key Light Air” type (model: 20LAB9901) was used. Furthermore, a Canon® M50 camera was used as the camera 5 and a Canon® EF-M 22 1:2 STM lens was used as the lens mounted on the camera. The person skilled in the art is free to use other equipment. The arrangement provides a standardizable test arrangement by means of which an image of the fabric 3 covering paper 2 can be taken and the degree of the optical covering can thus be determined using software, for example with the Adobe Photoshop® program.