Yarn capable of reflecting heat energy of high sunlight

Abstract

The invention discloses a high sunlight heat energy reflection yarn in the field of textile yarns, which comprises a yarn body, the circumference of the yarn body protrudes outwards to form a plurality of scattering convex blocks, the plurality of scattering convex blocks are arranged at intervals, and a scattering groove is formed between every two adjacent scattering convex blocks. The width of the scattering protruding blocks and the width of the scattering grooves are both distributed within the energy wave band of sunlight. The problem that existing yarn is insufficient in heat shielding performance is solved, light rays can be prevented from directly penetrating through or being absorbed into the yarn, in other words, the yarn can increase the light scattering effect on the basis of the original light reflection effect of the yarn under the irradiation of sunlight, more light rays are blocked outside the yarn, and therefore the heat shielding and sun blocking effects are achieved; and human body temperature rise caused by solar heat energy can be reduced.

Description

Technical Field

[0001] The invention relates to the technical field of textile yarns, in particular to a yarn with high solar heat energy reflection. Background Art

[0002] As the trend of global climate change becomes increasingly obvious, high temperatures in summer have become an important factor affecting people's daily lives. Prolonged exposure to strong sunlight can not only cause skin damage, but also cause health problems such as overheating. Therefore, the development of functional textiles that can effectively resist UV damage and reduce body temperature has become one of the key research directions of the industry.

[0003] In the traditional method, in order to achieve the purpose of sunshade and cooling, the industry adds titanium dioxide to the yarn to enhance the effect of the yarn reflecting sunlight, so that the woven fabric has a certain cooling and sun protection function. However, in actual use, due to the simple structure of conventional yarn, more light will still penetrate the yarn through reflection, causing the body temperature to rise; at the same time, due to the strong absorption capacity of textile materials such as titanium dioxide, polyester, and spandex for human infrared, human infrared cannot directly penetrate the fabric, and a heat cycle is formed inside, affecting the heat dissipation function. Therefore, the heat shielding performance of existing yarns still does not meet the demand.

[0004] The above defects urgently need to be solved. Summary of the invention

[0005] In order to solve the problem of insufficient heat shielding performance of existing yarns, the present invention provides a high solar heat energy reflecting yarn.

[0006] The technical solution of the present invention is as follows:

[0007] A high solar heat energy reflective yarn comprises a yarn body, wherein the yarn body protrudes outwardly in the circumference to form a plurality of scattering protrusions, the plurality of scattering protrusions are arranged at intervals, and a scattering groove is formed between two adjacent scattering protrusions, and the widths of the scattering protrusions and the scattering grooves are both distributed within the energy band of sunlight.

[0008] According to the above-mentioned solution of the present invention, the width of the scattering protrusion and the width of the scattering groove are both 400nm to 2500nm.

[0009] According to the above-mentioned solution of the present invention, the width of the scattering protrusion and the width of the scattering groove are continuously distributed according to the rule of an arithmetic sequence with a tolerance of 100 nm.

[0010] According to the above-mentioned solution of the present invention, the width values ​​of the plurality of scattering protrusions are not equal to the width values ​​of the plurality of scattering grooves, and are randomly distributed in the circumferential direction of the yarn body.

[0011] According to the above-mentioned solution of the present invention, each of the scattering bumps has two opposite side walls, and the side walls of all the scattering bumps have the same height, which is 280 nm to 400 nm.

[0012] According to the present invention of the above aspect, the yarn body is filled with zinc oxide.

[0013] According to the above scheme of the present invention, the material of the yarn body is nylon, the number of the scattering protrusions is four, the distance between the two scattering protrusions located at opposite corners is 2.5 μm, and the diameter of the yarn body is 1.9 μm.

[0014] According to the above-mentioned scheme of the present invention, the material of the yarn body is polyethylene, the number of the scattering protrusions is five, the distance between two diagonally located scattering protrusions is 9.1 μm, and the diameter of the yarn body is 8.5 μm.

[0015] According to the above scheme of the present invention, the material of the yarn body is polyethylene, the number of the scattering protrusions is six, the distance between the two scattering protrusions located at opposite corners is 10.6 μm, and the diameter of the yarn body is 9.88 μm.

[0016] According to the above-mentioned solution of the present invention, the cross-sectional shape of the yarn body is circular, and the cross-sectional shape of the scattering protrusion is fan-shaped.

[0017] The present invention according to the above scheme has the following beneficial effects:

[0018] In the above-mentioned high solar thermal energy reflective yarn, the width of the scattering protrusions and the width of the scattering grooves on the yarn body are distributed within the energy band of sunlight. According to Mie (light scattering) theory, when the energy band of sunlight matches the width of the scattering protrusions or the width of the scattering grooves, the light can be scattered at the corresponding scattering protrusions or scattering grooves, reducing the direct penetration or absorption of light into the interior of the yarn. That is, the yarn can increase the light scattering effect on the original light reflection effect of the yarn under the irradiation of sunlight, and block more light outside the yarn, thereby achieving the effect of heat shielding and sun protection, and further reducing the temperature rise of the human body caused by solar thermal energy.

[0019] In addition, the nylon material and vinyl material used in the yarn body of the present invention have high penetration of human infrared, and the zinc oxide filled in the yarn body not only has a high reflective effect on light, but also has a high absorption effect on unreflected ultraviolet light, thereby preventing ultraviolet damage to the skin. In addition, zinc oxide has extremely low absorption of human infrared and strong heat conduction ability, so that human infrared can effectively penetrate the fabric and exchange heat with the outside world, thereby achieving the effect of rapid heat dissipation and cooling. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is one of the structural diagrams of the first embodiment of the present invention;

[0021] Figure 2 This is a second structural diagram of the first embodiment of the present invention;

[0022] Figure 3 A schematic diagram showing the distribution of width values ​​of scattering protrusions and width values ​​of scattering grooves according to an embodiment of the present invention;

[0023] Figure 4 This is a schematic diagram of the structure of Embodiment 2 of the present invention;

[0024] Figure 5 Schematic diagram of the distribution of the width values ​​of the scattering protrusions and the width values ​​of the scattering grooves according to the second embodiment of the present invention;

[0025] Figure 6 This is a schematic diagram of the structure of Embodiment 3 of the present invention;

[0026] Figure 7 Schematic diagram of the distribution of the width values ​​of the scattering protrusions and the width values ​​of the scattering grooves according to the third embodiment of the present invention.

[0027] In the figure, 1, yarn body; 2, scattering protrusion; 21, first protrusion; 22, second protrusion; 23, third protrusion; 24, fourth protrusion; 25, fifth protrusion; 26, sixth protrusion; 3, scattering groove; 31, first groove; 32, second groove; 33, third groove; 34, fourth groove; 35, fifth groove; 36, sixth groove. DETAILED DESCRIPTION

[0028] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0029] Embodiment 1

[0030] like Figure 1 As shown, the present invention provides a high solar heat energy reflective yarn, including a yarn body 1, the yarn body 1 circumferentially protrudes outward to form four scattering protrusions 2, the four scattering protrusions 2 are arranged at intervals, and a scattering groove 3 is formed between two adjacent scattering protrusions 2, and the width of the scattering protrusion 2 and the width of the scattering groove 3 are both distributed within the energy band of sunlight.

[0031] According to Mie (light scattering) theory, when the energy band of sunlight matches the width of the scattering protrusion 2 or the width of the scattering groove 3, the light can be scattered at the corresponding scattering protrusion 2 or scattering groove 3, reducing the direct penetration or absorption of light into the interior of the yarn. That is, the yarn can increase the light scattering effect on the original light reflection effect of the yarn under the irradiation of sunlight, block more light outside the yarn, thereby achieving the effect of heat shielding and sun protection, and further reducing the temperature rise of the human body caused by solar heat energy.

[0032] For example, the yarn in the prior art can reflect 70% of the light, and 30% of the light passes through the yarn. However, the present technical solution, on the basis of reflecting 70% of the light, also uses the light scattering effect to reduce the light passing through the yarn, so that the light penetrating the yarn is much less than 30%.

[0033] As we all know, Mie (light scattering) theory states that when incident light hits the surface of a medium, light scattering occurs when the wavelength of the light is close to or equal to the diameter of the medium particles.

[0034] like Figure 1 , Figure 2 As shown, in this embodiment, the cross-sectional shape of the yarn body 1 is circular, and the cross-sectional shape of the scattering protrusion 2 is fan-shaped, so the cross-sectional shape of the yarn of the present invention is gear-shaped. Of course, in actual design, the cross-sectional shape of the yarn body 1 and the cross-sectional shape of the scattering protrusion 2 can be designed according to actual needs.

[0035] like Figure 1 As shown, it should be noted that the width of the fan-shaped scattering protrusion 2 refers to the arc length L1, and the width of the scattering groove 3 refers to the groove bottom arc length L2.

[0036] like Figure 2 , Figure 3As shown, in this embodiment, the width of the scattering protrusion 2 and the width of the scattering groove 3 are both 400nm to 2500nm, that is, the width of the scattering protrusion 2 and the width of the scattering groove 3 are distributed within the main energy band of sunlight. In addition, the width of the scattering protrusion 2 and the width of the scattering groove 3 can be designed to be within the range of 400nm to 1100nm, and are continuously distributed according to the law of an arithmetic sequence with a tolerance of 100nm. Specifically, the four scattering bumps 2 are divided into a first bump 21, a second bump 22, a third bump 23 and a fourth bump 24. The four scattering bumps 2 are arranged at intervals to form four scattering grooves 3. The four scattering grooves 3 are divided into a first groove 31, a second groove 32, a third groove 33 and a fourth groove 34. The first groove 31 is located between the first bump 21 and the second bump 22, the second groove 32 is located between the second bump 22 and the third bump 23, the third groove 33 is located between the third bump 23 and the fourth bump 24, and the fourth groove 34 is located between the fourth bump 24 and the first bump 21. The width of the first bump 21 is 400nm, the width of the first groove 31 is 500nm, the width of the second bump 22 is 600nm, the width of the second groove 32 is 700nm, the width of the third bump 23 is 800nm, the width of the third groove 33 is 900nm, the width of the fourth bump 24 is 1000nm, and the width of the fourth groove 34 is 1100nm.

[0037] When sunlight shines on the fabric, light with an energy wavelength of 400nm is scattered on the first bump 21, light with an energy wavelength of 500nm is scattered on the first groove 31, light with an energy wavelength of 600nm is scattered on the second bump 22, light with an energy wavelength of 700nm is scattered on the second groove 32, light with an energy wavelength of 800nm ​​is scattered on the third bump 23, light with an energy wavelength of 900nm is scattered on the third groove 33, light with an energy wavelength of 1000nm is scattered on the fourth bump 24, and light with an energy wavelength of 1100nm is scattered on the fourth groove 34.

[0038] When the fabric is produced, multiple yarns are needed for weaving. Due to the randomness of the yarns during the weaving process, the four scattering protrusions 2 will be randomly distributed on the surface of the fabric, and the light with energy wavelengths of 400nm, 500nm, 600nm, 700nm, 800nm, 900nm, 1000nm, and 1100nm will be scattered, thereby reducing the light that penetrates or is absorbed into the yarn and reducing the temperature rise of the human body caused by solar heat.

[0039] like Figure 1As shown, in the present embodiment, each scattering protrusion 2 has two opposite side walls, and the side wall height L3 of all scattering protrusions 2 is equal, and the height L3 of the side wall is 280nm~400nm. Preferably, the height L3 of the side wall is set to 300nm, so as to produce a significant scattering effect on the ultraviolet UVB band of about 300nm. Because the ultraviolet damage caused by sunlight to the human body is mainly in the ultraviolet UVB band, the design of the side wall height of 300nm can give the yarn an excellent ultraviolet protection effect. This technical solution cleverly utilizes the two side walls of the scattering protrusion 2, and multiple side walls can provide a design position of the required size (about 300nm), so as to further increase the ultraviolet protection effect of the yarn without the need to add additional ultraviolet reflectors. Of course, in actual design, the height of the scattering protrusion 2 can be designed according to actual needs.

[0040] In this embodiment, the yarn body 1 is filled with 3% zinc oxide, which can further enhance the yarn's blocking effect on ultraviolet rays, so that the yarn can achieve a sun protection effect. At the same time, zinc oxide has extremely low absorption of human infrared rays and strong thermal conductivity, which can enable human infrared rays to effectively penetrate the fabric and exchange heat with the outside world, achieving the effect of rapid heat dissipation and cooling, thereby improving wearing comfort and reducing the feeling of stuffiness and discomfort.

[0041] like Figure 1 As shown, in this embodiment, the material of the yarn body 1 is nylon, which has a good penetrating effect on human infrared (about 9μm), so that the fabric has an excellent human heat dissipation effect. In addition, the thermal conductivity of nylon is high. When in contact, it not only has an excellent cooling effect, but also can quickly conduct human heat to the fabric for heat dissipation, thereby improving the heat dissipation effect on the human body. At the same time, the nylon material used in the yarn body 1 has a high penetrating effect on human infrared, and the zinc oxide filled in the yarn body 1 not only has a high reflective effect on light, but also has a high absorption effect on unreflected ultraviolet light, thereby preventing ultraviolet light from damaging the skin.

[0042] In this embodiment, the distance L4 between the two diagonally located scattering protrusions 2 is 2.5 μm, and the diameter D of the yarn body 1 is 1.9 μm. Of course, in actual design, the distance L4 between the two diagonally located scattering protrusions 2 and the diameter D of the yarn body 1 can be designed according to actual needs to meet the requirements of the yarn process.

[0043] Embodiment 2

[0044] like Figure 4 , Figure 5As shown, different from Example 1, the yarn body 1 of this embodiment protrudes outward in the circumferential direction to form five scattering protrusions 2, and the five scattering protrusions 2 are arranged at intervals to form five scattering grooves 3. The width values ​​of the multiple scattering protrusions 2 are not equal to the width values ​​of the multiple scattering grooves 3, and are randomly distributed in the circumferential direction of the yarn body 1, and the width of the scattering protrusions 2 and the width of the scattering grooves 3 are both in the range of 400nm to 1300nm.

[0045] like Figure 4 , Figure 5 As shown, specifically, the five scattering protrusions 2 are divided into a first protrusion 21, a second protrusion 22, a third protrusion 23, a fourth protrusion 24 and a fifth protrusion 25, the five scattering protrusions 2 are arranged at intervals to form five scattering grooves 3, the five scattering grooves 3 are divided into a first groove 31, a second groove 32, a third groove 33, a fourth groove 34 and a fifth groove 35, the first groove 31 is located between the first protrusion 21 and the second protrusion 22, the second groove 32 is located between the second protrusion 22 and the third protrusion 23, the third groove 33 is located between the third protrusion 23 and the fourth protrusion 24, the fourth groove 34 is located between the fourth protrusion 24 and the fifth protrusion 25, and the fifth groove 35 is located between the fifth protrusion 25 and the first protrusion 21. The width of the first bump 21 is 400nm, the width of the first groove 31 is 600nm, the width of the second bump 22 is 800nm, the width of the second groove 32 is 500nm, the width of the third bump 23 is 700nm, the width of the third groove 33 is 900nm, the width of the fourth bump 24 is 1200nm, the width of the fourth groove 34 is 1000nm, the width of the fifth bump 25 is 1100nm, and the width of the fifth groove 35 is 1300nm. Of course, the width of the scattering bump 2 and the width of the scattering groove 3 can also be designed to be within the range of 400nm to 1300nm, and to be continuously distributed according to the law of an arithmetic sequence with a tolerance of 100nm. In actual design, the distribution of the width of the scattering bump 2 and the width of the scattering groove 3 can be designed according to actual needs.

[0046] When sunlight shines on the fabric, light with an energy wavelength of 400nm is scattered on the first bump 21, light with an energy wavelength of 600nm is scattered on the first groove 31, light with an energy wavelength of 800nm ​​is scattered on the second bump 22, light with an energy wavelength of 500nm is scattered on the second groove 32, light with an energy wavelength of 700nm is scattered on the third bump 23, light with an energy wavelength of 900nm is scattered on the third groove 33, light with an energy wavelength of 1200nm is scattered on the fourth bump 24, light with an energy wavelength of 1000nm is scattered on the fourth groove 34, light with an energy wavelength of 1100nm is scattered on the fifth bump 25, and light with an energy wavelength of 1300nm is scattered on the fifth groove 35.

[0047] When the fabric is produced, multiple yarns are needed for weaving. Due to the randomness of the yarns during the weaving process, the four scattering protrusions 2 will be randomly distributed on the surface of the fabric, and light with energy wavelengths of 400nm, 500nm, 600nm, 700nm, 800nm, 900nm, 1000nm, 1100nm, 1200nm, and 1300nm will be scattered, thereby reducing the light that penetrates or is absorbed into the yarn and reducing the temperature rise of the human body caused by solar heat.

[0048] In the present embodiment, each scattering protrusion 2 has two opposite side walls, and the side wall height L3 of all scattering protrusions 2 is equal, and the height L3 of the side wall is 280nm~400nm. Preferably, the height L3 of the side wall is set to 300nm, so as to produce a significant scattering effect on the ultraviolet UVB band of about 300nm. Because the ultraviolet damage caused by sunlight to the human body is mainly in the ultraviolet UVB band, the design of the side wall height of 300nm can give the yarn excellent ultraviolet protection effect. This technical solution cleverly utilizes the two side walls of the scattering protrusion 2, and multiple side walls can provide the design position of the required size (about 300nm), so as to further increase the ultraviolet protection effect of the yarn without the need to add additional ultraviolet reflectors. Of course, in actual design, the height of the scattering protrusion 2 can be designed according to actual needs.

[0049] In this embodiment, the material of the yarn body 1 is vinyl, which has a good penetrating effect on human infrared (about 9 μm), so that the fabric has an excellent human heat dissipation effect. In addition, vinyl has a high thermal conductivity, and when in contact, it not only has an excellent cooling effect, but also can quickly conduct human heat to the fabric for heat dissipation, thereby improving the heat dissipation effect on the human body. At the same time, the vinyl material used in the yarn body 1 has a high penetrating effect on human infrared, and the zinc oxide filled in the yarn body 1 not only has a high reflective effect on light, but also has a high absorption effect on unreflected ultraviolet light, thereby preventing ultraviolet light from damaging the skin.

[0050] In this embodiment, the distance L4 between the two diagonally located scattering protrusions 2 is 9.1 μm, and the diameter D of the yarn body 1 is 8.5 μm. Of course, in actual design, the distance L4 between the two diagonally located scattering protrusions 2 and the diameter D of the yarn body 1 can be designed according to actual needs to meet the requirements of the yarn process.

[0051] Embodiment 3

[0052] like Figure 6 , Figure 7 As shown, different from Example 2, the yarn body 1 of this embodiment protrudes outward in the circumferential direction to form six scattering protrusions 2, and the six scattering protrusions 2 are arranged at intervals to form six scattering grooves 3. The width of the scattering protrusions 2 and the width of the scattering grooves 3 are both in the range of 300nm to 1400nm, and are continuously distributed according to the law of an arithmetic sequence with a tolerance of 100nm.

[0053] like Figure 6 , Figure 7As shown, specifically, the six scattering protrusions 2 are divided into a first protrusion 21, a second protrusion 22, a third protrusion 23, a fourth protrusion 24, a fifth protrusion 25 and a sixth protrusion 26, the six scattering protrusions 2 are arranged at intervals to form six scattering grooves 3, the six scattering grooves 3 are divided into a first groove 31, a second groove 32, a third groove 33, a fourth groove 34, a fifth groove 35 and a sixth groove 36, the first groove 31 is located between the first protrusion 21 and the second protrusion 22, the second groove 32 is located between the second protrusion 22 and the third protrusion 23, the third groove 33 is located between the third protrusion 23 and the fourth protrusion 24, the fourth groove 34 is located between the fourth protrusion 24 and the fifth protrusion 25, the fifth groove 35 is located between the fifth protrusion 25 and the sixth protrusion 26, and the sixth groove 36 is located between the sixth protrusion 26 and the first protrusion 21. The width of the first projection 21 is 300nm, the width of the first groove 31 is 400nm, the width of the second projection 22 is 500nm, the width of the second groove 32 is 600nm, the width of the third projection 23 is 700nm, the width of the third groove 33 is 800nm, the width of the fourth projection 24 is 900nm, the width of the fourth groove 34 is 1000nm, the width of the fifth projection 25 is 1100nm, the width of the fifth groove 35 is 1200nm, the width of the sixth projection 26 is 1300nm, and the width of the sixth groove 36 is 1400nm. Of course, it is also possible to design that the width values ​​of multiple scattering projections 2 and the width values ​​of multiple scattering grooves 3 are not equal, and are randomly distributed in the circumferential direction of the yarn body 1. In actual design, the distribution of the width size of the scattering projections 2 and the width size of the scattering grooves 3 can be designed according to actual needs.

[0054] When sunlight irradiates the fabric, light with an energy wavelength of 300nm is scattered on the first bump 21, light with an energy wavelength of 400nm is scattered on the first groove 31, light with an energy wavelength of 500nm is scattered on the second bump 22, light with an energy wavelength of 600nm is scattered on the second groove 32, light with an energy wavelength of 700nm is scattered on the third bump 23, light with an energy wavelength of 800nm ​​is scattered on the third groove 33, light with an energy wavelength of 900nm is scattered on the fourth bump 24, light with an energy wavelength of 1000nm is scattered on the fourth groove 34, light with an energy wavelength of 1100nm is scattered on the fifth bump 25, light with an energy wavelength of 1200nm is scattered on the fifth groove 35, light with an energy wavelength of 1300nm is scattered on the sixth bump 26, and light with an energy wavelength of 1400nm is scattered on the sixth groove 36.

[0055] When the fabric is produced, multiple yarns are needed for weaving. Due to the randomness of the yarns during the weaving process, the four scattering protrusions 2 will be randomly distributed on the surface of the fabric, and light with energy wavelengths of 300nm, 400nm, 500nm, 600nm, 700nm, 800nm, 900nm, 1000nm, 1100nm, 1200nm, 1300nm, and 1400nm will be scattered, thereby reducing the light that penetrates or is absorbed into the yarn and reducing the temperature rise of the human body caused by solar heat.

[0056] In the present embodiment, each scattering protrusion 2 has two opposite side walls, and the side wall heights of all scattering protrusions 2 are equal, and the height L3 of the side wall is 280nm to 400nm. Preferably, the height L3 of the side wall is set to 360nm. Since the ultraviolet damage caused by sunlight to the human body is mainly in the ultraviolet UVA band and the ultraviolet UVB band, the design of the side wall height L3 of 360nm can give the yarn an excellent ultraviolet UVA band protection effect, and the protrusion already contains a size of 300nm, which can play a certain protective effect on the ultraviolet UVB band. The present technical solution cleverly utilizes the two side walls of the scattering protrusion 2, and multiple side walls can provide the design position of the required size (about 360nm), so that the ultraviolet protection effect of the yarn can be further increased without the need to add additional ultraviolet reflectors. Of course, in actual design, the height of the scattering protrusion 2 can be designed according to actual needs.

[0057] In this embodiment, the material of the yarn body 1 is vinyl, which has a good penetrating effect on human infrared (about 9 μm), so that the fabric has an excellent human heat dissipation effect. In addition, vinyl has a high thermal conductivity, and when in contact, it not only has an excellent cooling effect, but also can quickly conduct human heat to the fabric for heat dissipation, thereby improving the heat dissipation effect on the human body. At the same time, the vinyl material used in the yarn body 1 has a high penetrating effect on human infrared, and the zinc oxide filled in the yarn body 1 not only has a high reflective effect on light, but also has a high absorption effect on unreflected ultraviolet light, thereby preventing ultraviolet light from damaging the skin.

[0058] In this embodiment, in addition, the spacing L4 between the two diagonally located scattering protrusions 2 is 10.6 μm, and the diameter D of the yarn body 1 is 9.88 μm. Of course, in actual design, the spacing L4 between the two diagonally located scattering protrusions 2 and the diameter D of the yarn body 1 can be designed according to actual needs to meet the requirements of the yarn process.

[0059] It should be understood that those skilled in the art can make improvements or changes based on the above description, and all these improvements and changes should fall within the scope of protection of the appended claims of the present invention.

[0060] The above is an exemplary description of the present invention in conjunction with the accompanying drawings. It is obvious that the implementation of the present invention is not limited to the above-mentioned method. As long as various improvements are made by adopting the method concept and technical solution of the present invention, or the concept and technical solution of the present invention are directly applied to other occasions without improvement, they are all within the protection scope of the present invention.

Claims

1. A high solar heat reflective yarn, characterized in that: It includes a yarn body, which protrudes outward in the circumference to form a plurality of scattering protrusions, the plurality of scattering protrusions are arranged at intervals, and a scattering groove is formed between two adjacent scattering protrusions, and the width of the scattering protrusion and the width of the scattering groove are both distributed within the energy band of sunlight.

2. The high solar heat reflective yarn according to claim 1, characterized in that: The width of the scattering protrusion and the width of the scattering groove are both 400nm~2500nm.

3. The high solar heat reflective yarn according to claim 2, characterized in that: The width of the scattering protrusion and the width of the scattering groove are continuously distributed according to an arithmetic sequence with a tolerance of 100 nm.

4. The high solar heat reflective yarn according to claim 2, characterized in that: The width values ​​of the plurality of scattering protrusions are not equal to the width values ​​of the plurality of scattering grooves, and are randomly distributed in the circumferential direction of the yarn body.

5. The high solar heat reflective yarn according to claim 1, characterized in that: Each of the scattering bumps has two opposite side walls, and the side walls of all the scattering bumps have the same height, which is 280 nm to 400 nm.

6. The high solar heat reflective yarn according to claim 1, characterized in that: The yarn body is filled with zinc oxide.

7. The high solar heat reflective yarn according to claim 1, characterized in that: The material of the yarn body is nylon, the number of the scattering protrusions is four, the distance between two diagonally located scattering protrusions is 2.5 μm, and the diameter of the yarn body is 1.9 μm.

8. The high solar heat reflective yarn according to claim 1, characterized in that: The material of the yarn body is polyethylene, the number of the scattering protrusions is five, the distance between two diagonally located scattering protrusions is 9.1 μm, and the diameter of the yarn body is 8.5 μm.

9. The high solar heat reflective yarn according to claim 1, characterized in that: The material of the yarn body is polyethylene, the number of the scattering protrusions is six, the distance between two diagonally located scattering protrusions is 10.6 μm, and the diameter of the yarn body is 9.88 μm.

10. The high solar heat reflective yarn according to claim 1, characterized in that: The cross-section of the yarn body is circular, and the cross-section of the scattering protrusion is fan-shaped.

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