High-warm-keeping heat storage yarn

Abstract

A hollow structure is arranged in the center of the yarn, nano particles are filled in a non-hollow area, and the section of the yarn is a triangle with an inner arc-shaped edge. Still air is reserved in the hollow structure to form a heat insulation layer, the triangular section reduces the contact area between yarns to reduce heat conduction, and the arc-shaped edges increase porosity to improve air retention capacity; the nanoparticles inhibit heat conduction through an interface thermal resistance effect, and absorb and re-radiate heat of a human body by utilizing high emissivity of a middle infrared band, so that loss is reduced; the triangular edges accelerate moisture absorption and sweat releasing through the capillary effect. The problems of thermal imbalance caused by high heat conduction, limited aerogel addition and insufficient air retention of a circular cross section of a traditional material are solved, and the composite material has the advantages of low heat conduction, high heat storage and dynamic comfort, and is suitable for high and cold environments and sports textiles.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of textile technology, and specifically relates to a high-warm-keeping heat storage yarn. BACKGROUND

[0002] At present, the functional warm-keeping fibers on the market mostly adopt aerogel or graphene materials to reduce the thermal conductivity coefficient or enhance the infrared regulation capacity, but these materials have significant defects. Aerogel is difficult to realize high-proportion addition in the spinning process due to its extremely light physical properties, resulting in limited effect of reducing the thermal conductivity coefficient; although the graphene material fiber can improve the infrared absorption and emission efficiency, its high thermal conductivity is easy to conduct the temperature of the human body to the surface of the fabric through the fiber, thereby reducing the warm-keeping performance of the fabric, especially when there is no other shelter on the surface of the fabric, the high infrared emission will accelerate the loss of human body heat. In addition, the traditional circular cross-section yarn has a large contact area between fibers, the heat conduction path is dense, and there is a lack of effective air storage space, which further limits the improvement of the warm-keeping performance. Under this background, the existing technology cannot balance the low thermal conductivity and the high infrared heat storage capacity, especially when exercising and sweating, the heat loss and moisture accumulation problems are prominent, resulting in that the warm-keeping effect and comfort cannot be satisfied at the same time.

[0003] The above problems are worth solving. CONTENT OF THE UTILITY MODEL

[0004] In order to solve the problem that the existing textile technology cannot balance the low thermal conductivity and the high infrared heat storage capacity due to the low proportion of aerogel addition leading to insufficient heat insulation, the high-thermal-conductivity material such as graphene aggravating heat loss, and the large contact area and poor air storage capacity of the traditional circular cross-section yarn, the utility model provides a high-warm-keeping heat storage yarn.

[0005] The technical scheme of the utility model is as follows:

[0006] A high-warm-keeping heat storage yarn, the center of the yarn is provided with a hollow structure, and the non-hollow area is filled with nanoparticles; the cross-sectional outline of the yarn is a triangle, and the sides of the triangle are inwardly curved arc sides.

[0007] As a preferred technical scheme of the utility model, the triangle is an equilateral triangle with arc sides.

[0008] As a preferred technical scheme of the utility model, the side length of the triangular cross-section is 10 to 15 microns, and the height from the vertex of the arc side to the corresponding side is 0.5 to 2 microns.

[0009] As a preferred technical scheme of the utility model, the hollow structure is a circular hollow structure.

[0010] Further, the diameter of the circular hollow structure is 2-4 microns.

[0011] As a preferred technical scheme of the present application, the material of the yarn is polyacrylonitrile or polyethylene terephthalate.

[0012] As a preferred technical scheme of the present application, the nanoparticles are silicon dioxide particles and / or titanium dioxide particles.

[0013] Further, the silicon dioxide particles are of amorphous structure, and the titanium dioxide particles are of anatase type.

[0014] As a preferred technical scheme of the present application, the particle size of the nanoparticles is less than 50 nanometers.

[0015] As a preferred technical scheme of the present application, the filling mass percentage of the nanoparticles in the non-hollow region of the yarn is 10-20%.

[0016] The present application according to the above scheme has the following beneficial effects:

[0017] The high-warmth heat-storing yarn of the present application has a center hollow structure and a triangular cross-section outer contour, which significantly improves the heat insulation and heat storage performance; the hollow structure forms a thermal resistance layer by retaining still air, effectively reducing the path of heat conduction through the fiber; the special geometric shape of the inner arc-shaped edge of the triangular cross-section reduces the contact area between the yarns, further inhibiting heat conduction, while increasing the fiber surface porosity to enhance the air retention capacity; the nanoparticles filled in the non-hollow region reduce the thermal conductivity of the fiber through the interface thermal resistance effect, and utilize its high emissivity in the mid-infrared band to absorb the infrared radiation emitted by the human body and re-radiate back to the body surface, thereby reducing heat loss; in addition, the edge structure of the triangular cross-section accelerates water absorption and diffusion through capillary effect, achieving moisture absorption and quick-drying function in sports scenarios.

[0018] It can be seen that the present application solves the imbalance of warmth performance caused by the limitation of aerogel addition, serious heat loss of high thermal conductivity material and insufficient air retention of circular cross-section in the prior art through structural optimization and material synergistic effect, and takes into account low thermal conductivity, high infrared heat storage and dynamic comfort, and is suitable for functional textiles in high-cold environment and high-intensity sports scenarios. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 The present application is a structural schematic diagram.

[0020] In the drawings,

[0021] 1, hollow structure; 2, arc-shaped edge; 3, non-hollow region. DETAILED DESCRIPTION

[0022] In order to better understand the purpose, technical scheme and technical effect of the utility model, the utility model will be further explained in the following in combination with the drawings and examples. It should be noted that similar reference numerals and letters represent similar items in the following drawings, and therefore, once an item is defined in one drawing, it need not be further defined and explained in subsequent drawings. It is declared at the same time that the examples described below are only for explaining the utility model and do not limit the utility model.

[0023] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or there can be an intervening element, and when an element is referred to as being "connected to" another element, it can be directly connected to the other element or there can be an intervening element.

[0024] The indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship commonly used when the product of the application is used, or the orientation or positional relationship commonly understood by those skilled in the art, or the orientation or positional relationship commonly used when the product of the application is used, only for the convenience of describing the application and simplifying the description, and is not intended to indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the application.

[0025] As shown in Figure 1 A high-warmth heat-storing yarn, a hollow structure 1 is arranged at the center of the yarn, and nano-particles are filled in a non-hollow area 3; the cross-sectional outer contour of the yarn is triangular, and the edges of the triangle are inwardly curved arc-shaped edges 2. In the high-warmth heat-storing yarn of the utility model, the hollow structure 1 at the center of the yarn is filled with stationary air, and the thermal conductivity of air is very low, about 0.026 W / (m·K), forming a good heat insulation layer and effectively preventing heat conduction from the yarn.

[0026] The filled nano-particles have high emissivity in the mid-infrared wave band, and when the infrared rays radiated by the human body contact the yarn, the nano-particles can absorb the infrared rays and emit them again, reflecting the heat back to the human body, reducing the loss of heat from the human body to the outside world, and enhancing the warmth-keeping performance.

[0027] The unique design of the yarn shape, with the cross-sectional shape being triangular and the edges being inwardly curved arc-shaped edges, reduces the contact area between the yarns, and since the contact area is reduced, the path of heat conduction between the yarns is reduced, thereby reducing the thermal conduction coefficient between the yarns and further reducing heat loss.

[0028] In addition, the triangular cross section with inwardly curved arc-shaped edges increases the surface area of the yarn, which has a larger contact area with moisture. When the moisture contacts the yarn, it can be quickly absorbed. Moreover, the triangular edges and other structures help to form a capillary effect, allowing moisture to be more smoothly conducted in the yarn, accelerating the moisture removal process. After the moisture is quickly conducted to the surface of the fabric, the evaporation speed of the moisture is accelerated due to the increased surface area, thereby achieving moisture absorption and quick drying.

[0029] Compared with yarns with other shapes such as circular cross sections, the triangular cross section of the yarn according to the present application is more stable in mechanics. The triangular cross section yarn has good twist stability and is not easy to roll or twist during weaving, can maintain good form, and improve weaving efficiency and fabric quality. The isosceles triangle formed by the three single yarns can make the yarns combine more tightly, and can better maintain structural stability when implanting conductive wires or other substances, and has better overall mechanical properties.

[0030] In the present application, the triangle is an equilateral triangle with arc-shaped edges. The symmetry design of the equilateral triangle makes the yarn more evenly stressed during weaving, reduces the local heat conduction path caused by asymmetric structure, and ensures the stability of the heat insulation effect. The length of the arc-shaped edge 2 is in the optimization range of 10 to 15 microns, and the height L from the vertex of the arc-shaped edge 2 to the corresponding edge is 0.5 to 2 microns. The arc edge triangular cross section design forms a directional groove structure with the curved edge, accelerates the diffusion of moisture along the axial direction of the yarn through the capillary effect, avoids the accumulation of moisture in the local area, and improves the comfort of dynamic use scenarios; and while ensuring the mechanical strength of the yarn, the contact area between the yarns is maximized, and the thermal conductivity coefficient is reduced.

[0031] In a preferred embodiment, the length of the arc-shaped edge 2 is 12 microns, and the vertical height L from the vertex of the arc-shaped edge 2 to the corresponding edge is 1 micron.

[0032] In the present application, the hollow structure 1 is a circular hollow structure. The symmetry design makes the static air layer more evenly distributed, avoids the difference in local heat conduction path caused by irregular hollow shape, and ensures the stability and consistency of the heat insulation effect. Moreover, the circular hollow structure has a larger hollow volume under the same cross-sectional area, significantly reducing the weight of the yarn, and at the same time, the circular hollow structure is evenly stressed during spinning, reducing the risk of yarn breakage caused by hollow collapse or deformation, improving production yield, and meeting the demand for lightweight thermal textiles.

[0033] In a preferred embodiment, the diameter of the circular hollow structure is 2 to 4 microns.

[0034] In the utility model, the material of the yarn is polyacrylonitrile (PAN) or polyethylene terephthalate (PET). The material of the yarn is polyacrylonitrile, the natural high bulkiness of polyacrylonitrile fiber is utilized, and the hollow structure is cooperated to significantly increase the static air retention space, form a multilayer heat insulation barrier and further reduce the thermal conductivity. The material of the yarn is polyethylene terephthalate, the thermal conductivity of PET is lower, the interface thermal resistance effect of the nano particles is cooperated to cooperatively inhibit the heat conduction path and improve the overall thermal insulation performance; in addition, the polyethylene terephthalate fiber has high strength and strong deformation resistance, can support the structural stability of the triangular cross section, avoid the hollow collapse or cross section deformation caused by external force during weaving or use, has low processing difficulty and higher cost performance.

[0035] In the utility model, the nano particles are silicon dioxide particles and / or titanium dioxide particles. Preferably, the silicon dioxide particles are amorphous structure, the surface atoms of the amorphous silicon dioxide particles are arranged in disorder, have higher specific surface area (> 500 m 2 / g), form a complex interface when contacting the polyacrylonitrile or polyester fiber matrix, greatly increase the interface thermal resistance and inhibit the heat conduction through the fiber. The titanium dioxide particles are anatase type, the lattice defects and surface active sites of the anatase TiO2 are more abundant, the nano particles enhance the phonon scattering through the quantum size effect and further reduce the fiber thermal conductivity. The emissivity of the anatase titanium dioxide in the 8 to 13 mu infrared band is significantly higher than that of other crystal forms (such as rutile), can efficiently absorb the infrared radiation emitted by the human body and re-radiate back to the body surface, form a "heat reflection-re-radiation" cycle and reduce heat loss. Moreover, the preferred anatase titanium dioxide and amorphous (non-crystalline) silicon dioxide have lower density, larger volume and stronger function under the same filling mass.

[0036] In addition, the amorphous SiO2 and anatase TiO2 nano particles are not only chemically stable, non-toxic and harmless, but also have broad-spectrum antibacterial properties, such as Escherichia coli and Staphylococcus aureus, with an inhibition rate of > 99%, which can achieve long-term inhibition by destroying the microbial cell membrane or producing active oxygen, and improve the fabric hygiene performance.

[0037] The nano silicon dioxide / nano titanium dioxide particles, preferably with a particle size of less than 50 nm, have a significant quantum size effect, a large surface area of the nano material, and when contacting the fiber material, the interface thermal resistance between the material and the fiber material is increased, thereby reducing the thermal conductivity of the fiber material; the surface defects and active site density of the small particle size particles are higher, which can more efficiently absorb the infrared radiation emitted by the human body and re-radiate back to the body surface, form a dynamic heat cycle and reduce heat loss.

[0038] In the utility model, the filling mass percentage of the nano particles in the non-hollow area 3 of the yarn is 10-20%. Under the filling amount range, the mechanical strength of the fiber matrix and the reinforcing effect of the nano particles reach a balance - the tensile strength of the polyacrylonitrile (PAN) or polyester (PET) fiber can be kept greater than or equal to 3.5 cN / dtex, avoiding the increase of yarn rigidity or the decrease of breaking elongation caused by excessive filling of particles. At the same time, the filling amount of 10%-20% ensures that the nano particles can play a role in reducing thermal resistance and high infrared emission in the fiber material, and also avoids the problem of difficult spinning caused by excessive filling of particles.

[0039] The technical features of the above embodiments can be combined in any manner, and to make the description concise, all possible combinations of the technical features in the above embodiments are not described, however, as long as the combinations of the technical features do not exist contradictory, they should be considered as the scope of the present application.

[0040] The above embodiments only express several implementation manners of the utility model, the description is more specific and detailed, but it should not be understood as the limitation of the scope of the utility model patent. It should be pointed out that for ordinary skilled in the art, on the premise of not departing from the concept of the utility model, a number of modifications and improvements can be made, which belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent should be subject to the appended claims.

Claims

1. A high thermal retention heat-accumulating yarn, characterized by, The center of the yarn is provided with a hollow structure, and the non-hollow area is filled with nanoparticles, which are silica particles and / or titanium dioxide particles; the cross-section of the yarn has a triangular outer contour, and the edges of the triangle are inwardly curved arc-shaped edges. The triangle is an equilateral triangle with arc-shaped edges; the hollow structure is a circular hollow structure.

2. The high-loft thermal storage yarn of claim 1, wherein, The length of the edge of the triangular cross-section is 10-15 microns, and the height from the vertex of the arc-shaped edge to the corresponding edge is 0.5-2 microns.

3. The high-loft thermal storage yarn of claim 1, wherein, The diameter of the circular hollow structure is 2-4 microns.

4. The high-loft thermal storage yarn of claim 1, wherein, The material of the yarn is polyacrylonitrile or polyethylene terephthalate.

5. The high-loft thermal storage yarn of claim 1, wherein, The silica particles are amorphous, and the titanium dioxide particles are anatase.

6. The high-loft thermal storage yarn of claim 1, wherein, The particle size of the nanoparticles is less than 50 nanometers.

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