Breathable and sunscreen fabric

Abstract

The invention discloses a breathable and sunscreen fabric, and relates to the technical field of textiles. The special-shaped cross section yarn comprises special-shaped cross section yarn which is locally overturned by 90-180 degrees around the axis of the special-shaped cross section yarn, an overturning point is formed at the local overturning position of the special-shaped cross section yarn, and the length of the overturning point is 0.5-2 mm; a plurality of turning points are arranged on each yarn with the special-shaped section, and the distance between every two adjacent turning points ranges from 0.5 mm to 3 mm. The yarn with the special-shaped section is locally turned over by a certain angle and then is used for weaving to form the fabric, the wide face and the narrow face of the turned yarn with the special-shaped section are alternately exposed, the wide face provides an ultraviolet reflecting layer, the narrow face forms an axial airflow channel, and therefore on the premise that the whole fabric structure, appearance and anti-ultraviolet performance are kept, the fabric has the good anti-ultraviolet effect. Local small gaps are increased, and the breathable and moisture permeable effects are improved.

Description

Technical Field

[0001] The invention relates to the technical field of textiles, and in particular to a breathable and sun-proof fabric. Background Art

[0002] In order to improve the sun protection effect, traditional sun protection clothing fabrics are usually coated with chemical coatings or densely woven to achieve sun protection, but these methods can easily lead to problems such as poor breathability of the fabric, stuffiness when wearing, and low comfort.

[0003] The existing technology also usually uses special-section yarns for weaving to form sun-protective clothing fabrics, such as one-shaped special-section yarns, which can greatly improve the covering power, UV resistance and heat-shielding performance, but the conventional arrangement method is difficult to balance the porosity and UV shielding rate, and usually requires drastic post-processing such as alkali melting process to form local breathability, which has a certain impact on the environment.

[0004] Patent CN116732688A discloses a knitted fabric containing circular cross-section nylon filaments, shaped cross-section nylon filaments and metal ion modified artificial filaments. The porosity is increased by the circular cross-section nylon filaments, and the anti-ultraviolet effect is increased by the shaped cross-section nylon filaments. The shaped yarn and the round hole yarn are combined, but the shielding rate of the round hole yarn itself is not as good as that of the shaped yarn, and it is difficult to achieve excellent anti-UV effect.

[0005] Therefore, it is necessary to provide a sun-proof fabric that is environmentally friendly, simple in process, breathable and sun-proof. Summary of the invention

[0006] In order to solve the problems existing in the above-mentioned prior art, the purpose of the present invention is to provide a breathable and sun-proof fabric, by partially flipping the special-section yarn so that the wide side and the narrow side of the flipped yarn are alternately exposed to form an interlaced breathable channel, thereby improving its breathability while ensuring its anti-ultraviolet performance.

[0007] The present invention provides the following technical solutions:

[0008] The present invention provides a breathable and sun-proof fabric, which comprises a special-section yarn that is partially flipped 90-180 degrees around its axis, wherein a flip point is formed at the local flipping position of the special-section yarn, and the length of the flip point is 0.5-2mm; a plurality of flip points are provided on each of the special-section yarns, and the distance between two adjacent flip points is 0.5-3mm.

[0009] Furthermore, when the flipping angle of the flipping point is too small, the staggered air permeable channels formed by the alternating exposure of the wide and narrow sides of the special-section yarn are likely to be too small, resulting in poor air permeability; when the flipping angle is too large, the special-section yarn is likely to be continuously twisted, affecting the weaving and fabric effects; when the length between two adjacent flipping points is too small, the stability of the yarn is poor; when the length between two adjacent flipping points is too large, the pores are likely to be too large, affecting its anti-ultraviolet effect.

[0010] Preferably, the flipping angle is 120-160°.

[0011] Furthermore, the fabric is formed by weaving a plurality of groups of yarns with special cross-sections, and each group of yarns with special cross-sections includes at least one partially flipped yarn with special cross-sections.

[0012] Preferably, the fabric further comprises special-shaped cross-section yarns which have not been partially turned over, and the special-shaped cross-section yarns which have not been partially turned over and the special-shaped cross-section yarns which have been partially turned over are arranged at intervals.

[0013] Preferably, the cross-section of the special-section yarn is a flat structure.

[0014] Preferably, the cross-sectional size of the special-section yarn is 20D-150D.

[0015] Furthermore, the special-section yarn includes fully drawn yarn (FDY) yarn and / or de-stretched yarn (DTY) yarn.

[0016] Furthermore, the aspect ratio of the cross section of the special-section yarn is (1-2): (3-6).

[0017] Preferably, the cross-sectional shape of the special-shaped cross-sectional yarn is selected from one of cloud-shaped, elliptical, dumbbell-shaped, polygonal, flat ribbon-shaped and straight-line shape.

[0018] The present invention has the following technical effects:

[0019] The present invention uses a special-section yarn to be partially flipped and then woven to form a fabric. The wide side and the narrow side of the special-section yarn are alternately exposed after flipping, and the wide side provides an ultraviolet reflection layer and the narrow side forms an axial airflow channel. It is not necessary to weave through a large number of tucks, resulting in a large structural change. Therefore, while maintaining the overall fabric structure and appearance and anti-ultraviolet performance, local small gaps are added, and the air permeability and moisture permeability are significantly improved. In addition, by limiting the angle, length and distance between two adjacent flip points of the flip point, the fabric holes of the present invention can be distributed more evenly, avoiding local protrusions caused by tucks, affecting the smoothness of the hand feel, and improving overall comfort. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying any creative work.

[0021] Figure 1 This is a diagram of the arrangement of the yarns in a straight line cross section provided in Example 1 of the present invention.

[0022] The symbols in the figure are as follows: 1-reversed straight-shaped yarn with different cross-section; 101-reversal point; 2-unreversed straight-shaped yarn with different cross-section; L-length of the reversal point; D-distance between two adjacent reversal points on the same reversal straight-shaped yarn with different cross-section. DETAILED DESCRIPTION

[0023] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solution of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] It should be understood that when used in this specification and the appended claims, the terms "include" and "comprises" indicate the presence of described features, integers, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or combinations thereof.

[0025] In order to more fully understand the technical content of the present invention, the technical solution of the present invention is further introduced and illustrated in conjunction with specific embodiments below.

[0026] Example 1

[0027] A breathable and sun-protective fabric woven from 50D yarns in a straight cross section. Figure 1 The straight-section yarn includes the straight-section yarns 2 which are arranged at intervals and have not been turned over, and the turned-over straight-section yarns 1 which are partially turned over 180 degrees around their axes, and the turning point 101 is formed at the part where the turned-over straight-section yarns 1 are partially turned over.

[0028] Specifically, the distance D between two adjacent turning points 101 on each turning straight-line cross-section yarn 1 is 1.2 mm.

[0029] Specifically, the length L of the turning point is 0.8 mm.

[0030] Specifically, the straight-line cross-section yarn in this embodiment is FDY yarn.

[0031] Specifically, the length-to-width ratio of the cross section of the straight-section yarn is 1:6.

[0032] Example 2

[0033] A breathable and sun-proof fabric is knitted by cloud-shaped cross-section yarn with a cross-sectional size of 20D. The cloud-shaped cross-section yarn is partially turned 90° around its axis to form a turning point.

[0034] Specifically, the distance D between two adjacent turning points 101 on each turning cloud-shaped cross-section yarn is 0.5 mm.

[0035] Specifically, the length L of the turning point is 0.5 mm.

[0036] Specifically, the cloud-shaped cross-section yarn in this embodiment is FDY yarn.

[0037] Specifically, the length-to-width ratio of the cross section of the cloud-shaped cross-section yarn is 1:3.

[0038] Example 3

[0039] A breathable and sun-protective fabric, knitted from multiple groups of 150D profiled yarns.

[0040] In this embodiment, each group of special-section yarns includes 2 FDY yarns and 2 DTY yarns, and the FDY yarns and the DTY yarns are arranged alternately.

[0041] Specifically, the two FDY yarns in each group of special-section yarns include one FDY yarn that is not flipped and one FDY flipped yarn that is partially flipped 120° around its axis.

[0042] Specifically, the two DTY yarns in each group of special-section yarns include a DTY yarn that is not flipped and a DTY flipped yarn that is partially flipped 160° around its axis.

[0043] Specifically, each group of special-shaped cross-section yarns is arranged from left to right in the following order: DTY yarns that have not been flipped, FDY yarns that have not been flipped, DTY flipped yarns, and FDY flipped yarns.

[0044] Specifically, in this embodiment, the cross-sectional shape of the FDY yarn is a dumbbell shape, and the cross-sectional shape of the DTY yarn is a triangle.

[0045] Specifically, the distance D between two adjacent turning points on the DTY turning yarn is 2 mm.

[0046] Specifically, the length L of the turning point on the DTY turning yarn is 1.5 mm.

[0047] Specifically, the distance D between two adjacent turning points on the FDY turning yarn is 3 mm.

[0048] Specifically, the length L of the turning point on the FDY turning yarn is 2 mm.

[0049] Specifically, the aspect ratio of the cross section of the DTY yarn is 2:5.

[0050] Specifically, the aspect ratio of the cross section of the FDY yarn is 1:4.

[0051] Comparative Example 1

[0052] The difference between this comparative example and Example 1 is that the straight cross-section yarn is not partially turned over.

[0053] Comparative Example 2

[0054] The difference between this comparative example and Example 1 is that the flipping angle is 30°.

[0055] Comparative Example 3

[0056] The difference between this comparative example and Example 1 is that in this comparative example, the distance D between two adjacent turning points 101 on each turning straight-line cross-section yarn 1 is 5 mm.

[0057] Comparative Example 4

[0058] The difference between this comparative example and Example 1 is that the length L of the turning point in this comparative example is 5 mm.

[0059] Comparative Example 5

[0060] The only difference between this comparative example and Example 1 is that the length L of the turning point in this comparative example is 0.2 mm.

[0061] To illustrate the technical effect of the present invention, the fabrics of Examples 1-3 and Comparative Examples 1 and 2 were subjected to UV resistance tests and air permeability tests, and the test results are shown in Table 1 below.

[0062] Table 1 Results of UV resistance test and air permeability test

[0063] Test items UPF value Air permeability (mm / s) Porosity (%) Test Standards GB / T18830 GB / T5453 Microscopic imaging Example 1 78 508 1.8 Example 2 85 485 1.2 Example 3 88 443 0.8 Comparative Example 1 82 457 1.4 Comparative Example 2 76 478 1.6 Comparative Example 3 82 468 1.5 Comparative Example 4 63 586 2.6 Comparative Example 5 80 462 1.5

[0064] As shown in Table 1, the present invention can significantly improve the air permeability of the fabric while maintaining the anti-ultraviolet effect by partially flipping the special-section yarn. This solution is suitable for special-section yarns with different cross-sectional shapes, whose UPF is greater than 75 and the air permeability is higher than 430 mm / s.

[0065] By comparing Example 1 of the present invention with Comparative Examples 1-5 arranged on the basis thereof, it can be seen that when the flipping angle of the flipping point is too small, the staggered air permeable channel formed by the alternating exposure of the wide side and the narrow side of the special-section yarn is too small, and the air permeability effect is poor; when the flipping point length is too small, the effect of improving the air permeability is not obvious, and it is easy to affect the stability of the yarn and even cause the yarn to break; when the flipping point length is too long, its pores are too large, which will seriously reduce its shading effect; when the distance between two adjacent flipping points is too long, it is easy to affect its porosity and the air permeability effect is poor.

[0066] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed by the present invention, and these modifications or replacements should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be based on the protection scope of the claims.

Claims

1. A breathable and sun-proof fabric, characterized in that: It comprises a profiled cross-section yarn which is partially flipped 90-180° around its axis, wherein a flip point is formed at the local flipping position of the profiled cross-section yarn, and the length of the flip point is 0.5-2mm; each profiled cross-section yarn is provided with a plurality of flip points, and the distance between two adjacent flip points is 0.5-3mm.

2. The breathable and sun-proof fabric according to claim 1, characterized in that: The flipping angle is 120-160°.

3. The breathable and sun-proof fabric according to claim 1, characterized in that: The fabric is formed by weaving a plurality of groups of yarns with special cross-sections, and each group of yarns with special cross-sections includes at least one partially turned yarn with special cross-sections.

4. The breathable and sun-proof fabric according to claim 1, characterized in that: The fabric also includes the special-shaped cross-section yarns that have not been partially turned over, and the special-shaped cross-section yarns that have not been partially turned over and the special-shaped cross-section yarns that have been partially turned over are arranged at intervals.

5. The breathable and sun-proof fabric according to claim 1, characterized in that: The cross section of the special-shaped cross-section yarn is a flat structure.

6. The breathable and sun-proof fabric according to claim 1, characterized in that: The cross-sectional size of the special-section yarn is 20D-150D.

7. The breathable and sun-proof fabric according to claim 1, characterized in that: The special-section yarns include fully drawn silk yarns and / or low-elastic silk yarns.

8. The breathable and sun-proof fabric according to claim 1, characterized in that: The aspect ratio of the cross section of the special-shaped cross-section yarn is (1-2): (3-6).

9. The breathable and sun-proof fabric according to any one of claims 1 to 8, characterized in that: The cross-sectional shape of the special-shaped cross-sectional yarn is selected from one of cloud shape, ellipse, dumbbell shape, polygon, flat belt shape and straight shape.

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