Composite yarn and fabric with anti-perspective and anti-ultraviolet functions

Abstract

The invention discloses a composite yarn and fabric with anti-perspective and anti-ultraviolet functions, the composite yarn comprises a yarn main body, the yarn main body comprises modified extinction fibers F1 and super extinction fibers F2, the mass ratio of the modified extinction fibers F1 in the yarn main body is 20%-40%, and the TiO2 concentration in the modified extinction fibers F1 is larger than or equal to 1 wt%; the mass ratio of the super-extinction fibers F2 in the yarn main body is 60%-80%, the concentration of TiO2 in the super-extinction fibers F2 is larger than or equal to 3 wt%, and the average particle size of TiO2 particles is smaller than or equal to 500 nm; the boiling water shrinkage rate of the modified delustering fiber F1 is greater than that of the super-delustering fiber F2, the boiling water shrinkage rate of the modified delustering fiber F1 is greater than or equal to 20%, and the boiling water shrinkage rate of the super-delustering fiber F2 is less than or equal to 4%. When the composite yarn is applied to the fabric, the coverage rate is larger than or equal to 70%, and the fabric has the characteristics of being anti-perspective, anti-ultraviolet and cotton-like.

Description

Technical Field

[0001] The invention belongs to the technical field of textile yarns, in particular to a composite yarn and fabric with anti-see-through and anti-ultraviolet functions. Background Art

[0002] In the textile industry, the development of anti-see-through fabrics is a challenge, because fabrics with poor anti-see-through performance can easily show underwear or skin, affecting the privacy and comfort of the wearer. Nowadays, with the development of textile industry technology and the improvement of people's living standards, people have higher and higher requirements for the safety and comfort of wearing. This makes anti-see-through fabrics a very popular topic in the industry. The visual shielding effect of anti-see-through fabrics is essentially achieved by increasing the reflection, absorption, and scattering of visible light by textiles and reducing the amount of light passing through textiles. Specific implementation methods can include changes in the anti-see-through properties of fibers, setting fabric structure parameters, adding relevant auxiliaries, coating finishing, etc. Among them, super matte anti-see-through fibers can greatly reduce the amount of light passing through fibers, and are widely used in clothing fabrics, curtains, door curtains, shielding materials and other fields.

[0003] Invention application 201510290058.9, "A super anti-see-through double-layer fabric and its preparation method", discloses a super anti-see-through double-layer fabric made of warp and weft interwoven with anti-see-through FDY fibers, wherein the anti-see-through FDY fibers are non-peeling orange-peel shaped two-component composite fibers, and the two components are a polymer and the polymer containing 5-16wt% TiO2, wherein the polymer containing 5-16wt% TiO2 accounts for 6-30wt% of the anti-see-through FDY fibers; the anti-see-through FDY fibers are circular fibers, and the polymer containing 5-16wt% TiO2 is distributed in the polymer in a fan shape, the arc of the fan coincides with the outer circle of the anti-see-through FDY fibers, and the distance between the starting point of the fan and the center of the anti-see-through FDY fibers is 1 / 10 to 1 / 5 of the radius of the anti-see-through FDY fibers; the opacity of the anti-see-through FDY fibers reaches 99% to 100%.

[0004] Invention application 202010267962.9, "A moisture-absorbing, perspiration-resistant, and perspective-resistant composite fiber and its manufacturing method, and its fabric and manufacturing method" discloses a DTY fiber interwoven with both warp and weft threads having perspective-resistant properties. The fiber cross-section is a special-shaped skin-core structure, the core layer is circular, and the skin layer is cross-shaped, five-leaf or six-leaf; the core layer component is semi-matt PET with a TiO2 content of 0.25-0.3%, and the skin layer component is a blend of matt masterbatch and semi-matt PET with a TiO2 content of 2-10%. The fiber has moisture absorption, perspiration and perspective-resistant properties, and the resulting fabric has a good perspective-resistant effect.

[0005] In summary, the existing super matte anti-see-through fiber mainly achieves the anti-see-through function by changing the internal composition of the fiber, the fiber cross-sectional shape and increasing the amount of TiO2 added. However, due to the complex fiber component compound and cross-sectional shape changes, it is bound to cause great difficulty in production and low efficiency. In addition, the large amount of inorganic particles TiO2 added inside the fiber will cause the fiber to feel harder, the knitting needles to wear, and the strength to deteriorate, making the fabric feel worse and unable to meet people's requirements for comfort. Summary of the invention

[0006] In order to solve the above technical problems, the present invention provides a composite yarn and fabric with anti-see-through and anti-ultraviolet functions.

[0007] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0008] A composite yarn with anti-see-through and anti-ultraviolet functions, comprising a yarn main body, wherein the yarn main body comprises a modified matte fiber F1 and a super matte fiber F2, wherein the mass proportion of the modified matte fiber F1 in the yarn main body is 20%-40%, and the TiO2 concentration inside the modified matte fiber F1 is ≥1wt%; the mass proportion of the super matte fiber F2 in the yarn main body is 60%-80%, the TiO2 concentration inside the super matte fiber F2 is ≥3wt%, and the average particle size of the TiO2 particles is less than or equal to 500nm; the boiling water shrinkage of the modified matte fiber F1 is greater than the boiling water shrinkage of the super matte fiber F2.

[0009] The boiling water shrinkage of the modified matt fiber F1 is ≥20%, and the boiling water shrinkage of the super matt fiber F2 is ≤4%.

[0010] The modified dull fiber F1 and the super dull fiber F2 are compounded by a doubling process, and the modified dull fiber F1 and the super dull fiber F2 are connected side by side and attached to form a yarn body.

[0011] The modified matt fiber F1 and the super matt fiber F2 are compounded by a yarn wrapping process, and the super matt fiber F2 is coated and wound on the surface of the modified matt fiber F1.

[0012] The modified matt fiber F1 and the super matt fiber F2 are combined and connected and then subjected to heat treatment. The modified matt fiber F1 has a greater shrinkage and tensioning degree than the super matt fiber F2. The super matt fiber F2 is pulled and arched by the modified matt fiber F1. Each single fiber in the super matt fiber F2 is bent on the surface of the modified matt fiber F1 to form fluffy coils of different sizes.

[0013] The modified matte fiber F1 is a single-component or multi-component high-shrinkage fiber or a different-shrinkage fiber.

[0014] The ratio of the single fiber fineness of the modified matt fiber F1 to the super matt fiber F2 is DPF F1 / DPF F2 ≥1.

[0015] The modified matt fiber F1 and the super matt fiber F2 are both filament fibers.

[0016] The modified matt fiber F1 and the super matt fiber F2 are polyester fibers, polyamide fibers or regenerated cellulose fibers respectively.

[0017] A fabric, comprising the composite yarn described above, wherein when the coverage rate of the composite yarn per unit area in the fabric is ≥70%, the fabric has the characteristics of anti-perspective, anti-ultraviolet, and cotton-like feeling, and the anti-perspective index is ≥93, the ultraviolet protection factor UPF>40, and the long-wave ultraviolet transmittance T(UVA) is AV <5%, the fabric is a knitted or woven fabric.

[0018] Compared with the prior art, the present invention has the following beneficial technical effects:

[0019] Two fiber yarns with different characteristics are combined to form a composite yarn. The matte component inside the modified matte fiber F1 can reduce the amount of light passing through the yarn and increase the scattering and absorption of light on the yarn surface, thereby achieving the anti-transmission of the yarn body; utilizing different boiling water shrinkage rates, the modified matte fiber F1 shrinks significantly, driving the super matte fiber F2 to be pulled and arched, and each super matte single fiber will bend on the surface of the yarn body into arc-shaped fluffy coils of different sizes. The super matte coils can not only scatter and absorb a large amount of light on the surface of the fabric, but also do secondary reflection and scattering of the light reflected and scattered back from the yarn body, which is beneficial to enhancing the visual interference performance of the yarn; in addition, thanks to the higher TiO2 content inside the fiber and the fluffy coils distributed on the yarn surface, the composite yarn has anti-ultraviolet performance and a soft feel.

[0020] When applied to fabrics, it is necessary to ensure that the coverage rate is ≥ 70%. The fabric has the characteristics of anti-see-through, anti-ultraviolet, and cotton-like feel. It is suitable for making summer T-shirts, underwear, etc., and can meet people's needs for wearing comfort, functionality, and practicality.

[0021] There are no requirements for the cross-sectional shape of the fiber raw materials, and there is no pursuit of ultra-high TiO2 content. The composite process is simple and mature, and suitable for mass production. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A schematic diagram of an embodiment of the composite yarn of the present invention;

[0023] Figure 2 It is a schematic diagram of another embodiment of the composite yarn of the present invention. DETAILED DESCRIPTION

[0024] The embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0025] In the description of the present invention, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like are involved, the orientation or position relationship indicated is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0026] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection. It can be a mechanical connection or an electrical connection. It can be directly connected or indirectly connected through an intermediate medium. It can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0027] In this technical field, the luster of chemical fibers or man-made fibers is generally divided into three forms: glossy, semi-glossy, and matte. They are mainly defined based on the different concentrations of titanium dioxide in the fiber as a matting agent. The mass fraction of titanium dioxide in glossy fibers is between 0.01% and 0.03%, the mass fraction of titanium dioxide in semi-gloss fibers is about 0.4%, and the mass fraction of titanium dioxide in matte fibers reaches 0.5% to 2.4%. With the development of the industry and the upgrading of consumer demand, the demand for matte is getting higher and higher. At present, fibers with a mass fraction of titanium dioxide higher than 2.4% are usually called super matte fibers.

[0028] The content of titanium dioxide in modified matte fibers is between 0.03% and 2.0%, while the content of titanium dioxide in super matte fibers is relatively high. For example, the mass content of titanium dioxide in full matte fibers can be controlled at around 2.20%. In some super matte nylon yarns, the titanium dioxide content can reach 6.0±0.1%.

[0029] Therefore, the modified matt fiber and super matt fiber involved in the present application are mainly distinguished and defined based on the titanium dioxide content contained therein.

[0030] Embodiment 1

[0031] A composite yarn with anti-see-through and anti-ultraviolet functions, comprising a yarn main body, wherein the yarn main body comprises a modified matte fiber F1 and a super matte fiber F2, wherein the mass proportion of the modified matte fiber F1 in the yarn main body is 20%-40%, and the TiO2 concentration inside the modified matte fiber F1 is ≥1wt%; the mass proportion of the super matte fiber F2 in the yarn main body is 60%-80%, the TiO2 concentration inside the super matte fiber F2 is ≥3wt%, and the average particle size of the TiO2 particles is less than or equal to 500nm; the boiling water shrinkage of the modified matte fiber F1 is greater than the boiling water shrinkage of the super matte fiber F2, and the modified matte fiber F1 and the super matte fiber F2 are both filament fibers.

[0032] In order to form better performance, the boiling water shrinkage rate of the modified matt fiber F1 is ≥20%, and the boiling water shrinkage rate of the super matt fiber F2 is ≤4%. The boiling water shrinkage rate of the modified matt fiber F1 is much larger than the boiling water shrinkage rate of the super matt fiber F2. When the modified matt fiber F1 shrinks, it will drive the super matt fiber F2 to form a coil.

[0033] like Figure 1 As shown, the modified dull fiber F1 and the super dull fiber F2 are compounded by a doubling process, and the modified dull fiber F1 and the super dull fiber F2 are connected side by side to form a yarn body. In this structure, the modified dull fiber F1 and the super dull fiber F2 are in a side-by-side form.

[0034] Or Figure 2 As shown, the modified matt fiber F1 and the super matt fiber F2 are compounded by a yarn wrapping process, and the super matt fiber F2 is wrapped around the surface of the modified matt fiber F1, the modified matt fiber F1 forms a core wire part inside, and the super matt fiber F2 is on the outer surface.

[0035] In the above two structural forms, after the initial connection is completed, the modified matte fiber F1 is subjected to heat treatment. Since the boiling water shrinkage rate of the modified matte fiber F1 is much greater than that of the super matte fiber F2, the degree of shrinkage and tension of the modified matte fiber F1 is greater than that of the super matte fiber F2. The super matte fiber F2 is pulled and arched by the modified matte fiber F1, and each single fiber in the super matte fiber F2 will bend into fluffy coils of different sizes on the surface of the modified matte fiber F1. The matte component inside the modified matte fiber F1 can reduce the amount of light passing through the yarn and increase the scattering and absorption of light on the surface of the yarn, thereby achieving the anti-transmission of the yarn body. The coil formed by the super matte fiber F2 is located in the outer layer, which can not only scatter and absorb a large amount of light on the surface of the fabric, but also do secondary reflection and scattering of the light reflected and scattered back by the modified matte fiber F1, which is beneficial to enhance the visual interference performance of the yarn.

[0036] In addition, thanks to the high TiO2 content inside the fiber and the fluffy coils distributed on the surface of the yarn, the composite yarn has the characteristics of anti-ultraviolet performance and soft feel. At the same time, by combining the different characteristics of the modified matte fiber F1 and the super matte fiber F2, there is no need for an ultra-high TiO2 content, which solves the problem that traditional yarns need to add an ultra-high content of TiO2 to enhance the anti-ultraviolet performance, such as often needing to add at least 20% of TiO2 content. In the present invention, the TiO2 concentration inside the modified matte fiber F1 is ≥1wt%, and the TiO2 concentration inside the super matte fiber F2 is ≥3wt%. The relatively low content can also play a role in anti-ultraviolet and reduce costs.

[0037] Embodiment 2

[0038] Based on the embodiment, the modified matte fiber F1 is a single-component or multi-component high-shrinkage fiber or a different-shrinkage fiber.

[0039] The modified matte fiber is selected as a two-component iso-shrinkage fiber. Due to the natural curling characteristics of the iso-shrinkage yarn, the yarn as a whole will show a certain mechanical elasticity.

[0040] Alternatively, the modified matte fiber is selected as a single-component differential shrinkage fiber, and the yarn as a whole has mechanical elasticity.

[0041] Alternatively, the modified matte fiber is a high shrinkage fiber, and the main body of the yarn shrinks tightly and has no elasticity.

[0042] The specific selection of composite yarn can be determined according to the application occasion of the fabric to meet the needs of different occasions and different user groups.

[0043] Conventional fibers and high shrinkage yarns can be defined by shrinkage values:

[0044] The maximum shrinkage rate of conventional fibers after heating is usually no more than 10%, for example: the shrinkage rate of conventional polyester fibers: the shrinkage rate of general polyester fibers is between 0.3% and 0.6%; the shrinkage rate of conventional polyamide fibers: the shrinkage rate of polyamide 6 (PA6) is between 0.5% and 2.2%, and the shrinkage rate of polyamide 66 (PA66) is between 1% and 2%; the shrinkage rate of conventional regenerated cellulose fibers: such as viscose is about 10%; and the shrinkage rate of high shrinkage fibers is generally above 20%, and even as high as 60% to 70%.

[0045] Hetero-shrinkage fibers refer to the presence of two or more polyester fiber components with different shrinkage properties in the same fiber or fiber bundle. This fiber is manufactured through corresponding spinning processes, such as composite spinning. In the fiber, different components will show different shrinkage behaviors when subjected to heat, moisture and other treatment conditions due to differences in chemical structure, crystallinity, orientation and other factors, resulting in special appearance and properties of the fiber, such as curling and fluffy.

[0046] Generally speaking, the overall shrinkage of heterogeneous shrinkage silk fibers is between 5% and 30%. If the high shrinkage component accounts for a high proportion and the shrinkage conditions are suitable, the overall shrinkage may be close to the shrinkage of the high shrinkage component, reaching about 30%; on the contrary, if the high shrinkage component accounts for a low proportion, the overall shrinkage will be relatively low.

[0047] Embodiment 3

[0048] On the basis of the first embodiment, there are also many different ways to select the fiber carrier of the composite yarn. The modified matte fiber F1 and the super matte fiber F2 are polyester fibers, polyamide fibers or regenerated cellulose fibers, respectively. For example, the composite yarn is a combination of polyester fibers and polyester fibers; or the composite yarn is a combination of polyamide fibers and polyamides; or the composite yarn is a combination of polyester fibers and polyamide fibers; or the composite yarn is a combination of polyester fibers and regenerated cellulose fibers; or the composite yarn is a combination of polyamide fibers and regenerated cellulose fibers. The specific combination can be flexibly selected.

[0049] The ratio of the single fiber fineness of the modified matt fiber F1 to the super matt fiber F2 is DPF F1 / DPF F2 ≥1, the modified matt fiber F1 is larger and serves as the main part, and the super matt fiber F2 serves as the outer layer.

[0050] In addition, a fabric, which may be a knitted or woven fabric, includes the composite yarn described above, and when the unit area coverage of the composite yarn in the fabric is ≥70%, the fabric has the characteristics of anti-see-through, anti-ultraviolet, and cotton-like feeling, and the anti-see-through index is ≥93, the ultraviolet protection factor UPF>40, and the long-wave ultraviolet transmittance T(UVA) isAV <5%, the fabric is a knitted or woven fabric.

[0051] The coverage rate of yarn per unit area in fabric refers to the area ratio of yarn per unit area of ​​fabric, which reflects the coverage degree of yarn on the fabric surface. It can be used to evaluate the tightness, permeability and other properties of fabric. Fabrics with high coverage are usually tighter and may have better windproof and light-shielding properties; on the contrary, they are relatively loose and may have better air permeability and moisture permeability.

[0052] Taking the composite yarn application of this application as an example, taking knitted fabrics as an example, weft knitted plain fabrics, generally speaking, the coverage rate of the composite yarn is about 40%-70%; warp knitted warp flat fabrics, the coverage rate of the composite yarn is roughly 30%-60%. Taking woven fabrics as an example, woven plain fabrics, the coverage rate of the composite yarn per unit area is 60%-90%.

[0053] Because knitted fabrics are generally loose, the coverage is set at 70%, which is intended to express that the tightness of the fabric needs to be designed to be higher when using the yarn of this patent.

[0054] The anti-see-through index ≥93 is the lower limit indicator for the evaluation of anti-see-through fabrics specified in the national standard GB / T 42698-2023 "Testing and Evaluation of Anti-see-through Properties of Textiles". An anti-see-through index lower than 93 will be evaluated as not having anti-see-through properties.

[0055] Ultraviolet protection factor UPF>40, long-wave ultraviolet transmittance T(UVA)AV<5%, both parameters are derived from the judgment parameters of the national standard GB / T 18830-2009 "Evaluation of UV protection performance of textiles".

[0056] When the yarn of this patent is used, when the fabric density exceeds 70%, the anti-see-through and anti-ultraviolet performance test results can pass the relevant national standards.

[0057] The following is an explanation with a specific example.

[0058] Production Example 1:

[0059] 1. Selection of composite yarn:

[0060] A composite yarn with specifications of PES+PTT / PES 37.5 / 62.5 80D / 48F DTY / FDY is used, wherein PES+PTT is 30D / 12F semi-dull two-component iso-shrinkage polyester FDY fiber, with a TiO2 concentration of 1.2wt%, a boiling water shrinkage of 26%, and DPF=2.5; PES is 50D / 36F super-dull polyester DTY fiber, with a TiO2 concentration of 16wt%, a boiling water shrinkage of 2%, and DPF=1.38; the two are compounded by network point doubling.

[0061] 2. Model used:

[0062] Weft knitting single-sided circular machine, 44G, 34 inches.

[0063] 3. Weaving process

[0064] Single-sided plain weave.

[0065] 4. Dyeing and finishing process

[0066] 95℃ overflow washing → 160℃ high temperature setting → overflow dyeing → dry cloth → finishing.

[0067] 5. Finished product parameters

[0068] 1) Finished product specifications: 160CM*170GSM.

[0069] 2) Functional test results of textiles

[0070]

[0071] Production Example 2

[0072] 1. Selection of composite yarn:

[0073] A composite yarn with specifications of PES (High Shrinkage) / PA6 33.3 / 66.7 60D / 48F FDY / DTY was used, wherein PES (High Shrinkage) was 20D / 12F semi-dull high shrinkage FDY polyester fiber, with a TiO2 concentration of 1.4wt%, a boiling water shrinkage of 40%, and a DPF of 1.67; PA6 was 40D / 36F super-dull polyamide DTY fiber, with a TiO2 concentration of 11wt%, a boiling water shrinkage of 4%, and a DPF of 1.11; the two were composited by network point doubling.

[0074] 2. Model used:

[0075] Weft knitting single-sided circular machine, 44G, 34 inches.

[0076] 3. Weaving process

[0077] Single-sided plain weave.

[0078] 4. Dyeing and finishing process

[0079] 95℃ overflow washing → 160℃ high temperature setting → overflow dyeing → dry cloth → finishing.

[0080] 5. Finished product parameters

[0081] 1) Finished product specifications: 160CM*155GSM.

[0082] 2) Functional test results of textiles

[0083]

[0084] The above tests are conducted in accordance with the national standard GB / T 42698-2023 "Testing and Evaluation of Anti-See-Through Properties of Textiles". The above anti-see-through index is the lower limit indicator for the evaluation of anti-see-through fabrics specified in this standard. An anti-see-through index lower than 93 will be evaluated as having no anti-see-through performance.

[0085] Ultraviolet protection factor UPF>40, long-wave ultraviolet transmittance T(UVA)AV<5%, tested in accordance with national standard GB / T 18830-2009 "Evaluation of UV protection performance of textiles".

[0086] It should be noted that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. However, any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A composite yarn with anti-see-through and anti-ultraviolet functions, comprising a yarn body, characterized in that: The yarn body comprises a modified matte fiber F1 and a super matte fiber F2, wherein the mass proportion of the modified matte fiber F1 in the yarn body is 20%-40%, and the TiO2 concentration inside the modified matte fiber F1 is ≥1wt%; The mass proportion of the super-dull fiber F2 in the yarn body is 60%-80%, the TiO2 concentration inside the super-dull fiber F2 is ≥3wt%, and the average particle size of the TiO2 particles is less than or equal to 500nm; the boiling water shrinkage rate of the modified dull fiber F1 is greater than the boiling water shrinkage rate of the super-dull fiber F2.

2. The composite yarn with anti-see-through and anti-ultraviolet functions according to claim 1, characterized in that: The boiling water shrinkage of the modified matt fiber F1 is ≥20%, and the boiling water shrinkage of the super matt fiber F2 is ≤4%.

3. The composite yarn with anti-see-through and anti-ultraviolet functions according to claim 1, characterized in that: The modified dull fiber F1 and the super dull fiber F2 are compounded by a doubling process, and the modified dull fiber F1 and the super dull fiber F2 are connected side by side and attached to form a yarn body.

4. The composite yarn with anti-see-through and anti-ultraviolet functions according to claim 1, characterized in that: The modified matt fiber F1 and the super matt fiber F2 are compounded by a yarn wrapping process, and the super matt fiber F2 is coated and wound on the surface of the modified matt fiber F1.

5. The composite yarn with anti-see-through and anti-ultraviolet functions according to claim 3 or 4, characterized in that: The modified matt fiber F1 and the super matt fiber F2 are combined and connected and then subjected to heat treatment. The modified matt fiber F1 has a greater shrinkage and tensioning degree than the super matt fiber F2. The super matt fiber F2 is pulled and arched by the modified matt fiber F1. Each single fiber in the super matt fiber F2 is bent on the surface of the modified matt fiber F1 to form fluffy coils of different sizes.

6. The composite yarn with anti-see-through and anti-ultraviolet functions according to claim 1, characterized in that: The modified matte fiber F1 is a single-component or multi-component high-shrinkage fiber or a different-shrinkage fiber.

7. The composite yarn with anti-see-through and anti-ultraviolet functions according to claim 1, characterized in that: The ratio of the single fiber fineness of the modified matt fiber F1 to the super matt fiber F2 is DPF F1 / DPF F2 ≥1.

8. The composite yarn with anti-see-through and anti-ultraviolet functions according to claim 1, characterized in that: The modified matt fiber F1 and the super matt fiber F2 are both filament fibers.

9. The composite yarn with anti-see-through and anti-ultraviolet functions according to claim 1, characterized in that: The modified matt fiber F1 and the super matt fiber F2 are respectively polyester fibers, polyamide fibers or regenerated cellulose fibers.

10. A fabric, characterized in that: The composite yarn according to any one of claims 1 to 9, when the unit area coverage of the composite yarn in the fabric is ≥70%, the anti-perspective index of the fabric is ≥93, the ultraviolet protection factor UPF>40, and the long-wave ultraviolet transmittance T(UVA) is AV <5%, the fabric is a knitted or woven fabric.

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