Sun-proof quick-dry cool-feeling yarn

Abstract

The utility model relates to a sun-proof quick-dry cool-feeling yarn which is of a bi-component skin-core structure, the bi-component skin-core structure comprises a core layer and a skin layer, the core layer is made of PA materials and has high specific heat capacity, so that the specific heat capacity of the yarn is greatly improved, and the PA materials have soft performance, so that the yarn has good softness while keeping cool feeling; the skin layer is made of a PET (Polyethylene Terephthalate) material, has excellent quick-drying performance and can quickly disperse moisture, so that the skin sticking phenomenon caused by sweating is avoided; the heat-conducting particles are added into the skin layer, so that the heat-conducting property of the skin layer is improved, the heat-conducting property of the yarn is remarkably enhanced, and the yarn has a more lasting and cool touch feeling by combining the heat-conducting particles with the PA with high specific heat capacity of the core layer; the nano-scale heat-conducting particles uniformly dispersed in the skin layer can reflect sunlight, reduce the absorption of sunlight heat energy by the yarn, improve the sun-screening performance of the fabric, play the antibacterial role of the nano-material, and solve the problems that a traditional after-finishing sun-screening agent is easy to fall off and the antibacterial effect is invalid.

Description

Technical Field

[0001] This utility model relates to the field of textile technology, specifically to a sun-protective, quick-drying, and cooling yarn. Background Technology

[0002] With the improvement of people's living standards and the increase in outdoor activities, the demand for textiles with multiple functions such as sun protection, quick drying, and cooling sensation is growing. However, existing yarn technology has many shortcomings in meeting these comprehensive functions.

[0003] Commonly used single-component sun-protective cooling yarns, primarily made of polyester or highly thermally conductive nylon, struggle to balance quick-drying and cooling properties. For example, quick-drying yarns typically use polyester (PET) to wick away sweat quickly due to its low absorbency, but polyester itself has poor thermal conductivity, failing to provide a cooling sensation in hot weather and lacking effective sun protection. While polyethylene yarn has good thermal conductivity, it is non-hygroscopic and difficult to dye, limiting its applications. Cooling yarns often rely on the high specific heat capacity and high thermal conductivity of nylon (PA) to achieve a cooling sensation upon contact, but nylon is highly hygroscopic, dries slowly after absorbing moisture, and has poor quick-drying properties, causing clothing to stick to the body, making one feel stuffy and uncomfortable. Furthermore, nylon's sun protection performance is also poor.

[0004] On the other hand, traditional sun-protective yarns mainly achieve their sun protection function by adding UV absorbers through finishing processes. This method has significant drawbacks; the UV absorbers added during finishing are easily shed after repeated washing, leading to a substantial decrease in sun protection effectiveness and making it difficult to provide long-lasting sun protection. Furthermore, the finishing process may affect the yarn's feel and breathability, reducing wearing comfort.

[0005] Therefore, the industry urgently needs to develop a yarn that integrates sun protection, quick-drying, and cooling functions. Utility Model Content

[0006] In order to solve the problems of limited functionality and insufficient thermal conductivity of existing single-component yarns, resulting in poor quick-drying and cooling effects, this utility model provides a sun-protective, quick-drying, and cooling yarn.

[0007] The technical solution of this utility model is as follows:

[0008] A sun-protective, quick-drying, and cooling yarn has a two-component core-sheath structure, comprising an inner core layer and an outer sheath layer. The core layer is made of polyamide, and the sheath layer is made of polyethylene terephthalate. The interior of the sheath layer contains a number of highly thermally conductive particles, such that the thermal conductivity of the sheath layer is greater than 0.24 W / (m·K).

[0009] As a preferred embodiment of this utility model, the heat-conducting particles are one or more of zinc oxide, aluminum oxide, and hexagonal boron nitride.

[0010] As a preferred embodiment of this utility model, the particle size of the thermally conductive particles is 100 to 800 nanometers.

[0011] Furthermore, the particle size of the thermally conductive particles is 500±50 nanometers.

[0012] As a preferred embodiment of this utility model, the mass percentage of thermally conductive particles in the skin layer is 10% to 25%.

[0013] Furthermore, the thermally conductive particles are zinc oxide, and the zinc oxide particles account for 15% of the mass percentage in the skin layer.

[0014] As a preferred embodiment of this utility model, the diameter of the sun-protective, quick-drying, and cooling yarn is 10 to 20 micrometers, the thickness of the outer layer is 1 to 5 micrometers, and the diameter of the core layer is 8 to 15 micrometers.

[0015] Furthermore, the yarn has a diameter of 12 micrometers, the sheath has a thickness of 2.5 micrometers, and the core has a diameter of 10 micrometers.

[0016] As a preferred embodiment of this utility model, the cross-section of the sun-protective, quick-drying, and cooling yarn is a concentric ring structure, with the inner core layer having a circular cross-section and the outer skin layer having an annular cross-section.

[0017] In a preferred embodiment of this utility model, the core layer is made of PA6.

[0018] The advantages of this utility model based on the above solution are as follows:

[0019] The yarn outer layer of this invention is made of PET material, which has excellent quick-drying properties and can quickly dissipate moisture, avoiding the sticky feeling caused by sweating. In addition, thermally conductive particles are added to the outer layer to improve its thermal conductivity, making its thermal conductivity exceed 0.24 W / (m·K), which significantly enhances the thermal conductivity of the yarn and gives the outer layer of the yarn a cool touch.

[0020] The yarn core layer is made of PA material, which has both high specific heat capacity and high thermal conductivity, making the specific heat capacity of the yarn significantly higher than that of pure PET yarn; in addition, PA material has higher softness, so that the yarn maintains a long-lasting cool feeling while having good softness.

[0021] Furthermore, the uniform dispersion of nano-sized thermally conductive particles in the skin layer not only improves the thermal conductivity of the yarn but also reflects sunlight, reducing the yarn's absorption of solar heat and enhancing the fabric's sun protection performance. At the same time, the antibacterial effect of nanomaterials is utilized, solving the problems of easy shedding and antibacterial failure of traditional finishing sunscreens. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of this utility model.

[0023] In the diagram,

[0024] 1. Cortex; 2. Core. Detailed Implementation

[0025] To better understand the purpose, technical solution, and technical effects of this utility model, the following description, in conjunction with the accompanying drawings and embodiments, will provide further explanation. It should be noted that similar reference numerals and letters in the following drawings indicate similar items; therefore, once an item is defined in one drawing, it does not need further definition and explanation in subsequent drawings. It is also stated that the embodiments described below are only for explaining this utility model and are not intended to limit it.

[0026] It should be noted that when a component is referred to as "fixed to" or "set on" another component, it can be directly on the other component or there may be an intermediate component. When a component is referred to as "connected to" another component, it can be directly connected to the other component or there may be an intermediate component.

[0027] The indicated orientation or positional relationship is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use, or the orientation or positional relationship commonly understood by those skilled in the art, and is only for the convenience of describing this application and simplifying the description, and is not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. "Several" means two or more, unless otherwise expressly and specifically defined.

[0028] like Figure 1As shown, a sun-protective, quick-drying, and cooling yarn has a two-component core-sheath structure, comprising an inner core layer 2 and an outer sheath layer 1. The composition of the inner core layer 2 differs from that of the outer sheath layer 1. The core layer 2 is made of polyamide (PA), and the sheath layer 1 is made of polyethylene terephthalate (PET). Several thermally conductive particles are distributed inside and / or on the surface of the sheath layer 1 to ensure a thermal conductivity greater than 0.24 W / (m·K). In this invention, the PA core layer 2 provides a cooling sensation, while the PET sheath layer 1 enhances thermal conductivity and quick-drying performance through the thermally conductive particles. This solves the problem that traditional yarns often focus on a single function and cannot simultaneously meet the demands for high cooling sensation, rapid moisture wicking, and sun protection. Furthermore, the uniform dispersion of these thermally conductive particles in the sheath layer 1 prevents the shedding of finishing agents, as is common in traditional methods, ensuring the durability of sun protection and antibacterial properties.

[0029] The manufacturing process of this utility model includes material preparation and extrusion molding.

[0030] 1. Prepare materials;

[0031] Pretreated thermally conductive particles and dried PET chip powder were added to a high-speed mixer at a mass ratio of 10% to 25% (e.g., 15% ZnO). The mixture was stirred at 1000-1500 rpm for 10-15 minutes to ensure uniform dispersion of ZnO particles in the PET chip powder. The mixture was then fed into a twin-screw extruder, and the melt temperature was set to 260-280℃. The shear force of the screws ensured uniform dispersion of the thermally conductive particles in the PET melt. It is evident that the nano-thermal conductive ZnO particles are uniformly dispersed in the PET skin layer 1, representing a physical mixture that does not alter the chemical properties of the PET and the particles.

[0032] 2. Extrusion molding;

[0033] Core layer preparation: Polyamide chips are melted at 220-250℃ and pumped into the core layer channel of the composite spinning assembly via a metering pump. Sheath layer preparation: PET composite masterbatch containing thermally conductive particles is melted at 250-270℃ and pumped into the sheath layer channel via a metering pump. Composite molding: The core and sheath melts converge at the spinneret and are extruded through concentric annular spinnerets (inner diameter 8-15μm, outer diameter 10-20μm) to form core-sheath structured nascent fibers. Finally, cooling and drawing are performed to obtain a bicomponent core-sheath structured yarn.

[0034] In this invention, the cross-section of the sun-protective, quick-drying, and cooling yarn is a concentric ring structure, with the inner core layer having a circular cross-section and the outer sheath layer having an annular cross-section. The core layer is preferably made of PA6.

[0035] In an optional embodiment, the added nanoscale thermally conductive particles are alumina, with a particle size range of 100-2500 nm, a D50 of 500 nm, and an addition ratio of 15%. The diameter of the sun-protective, quick-drying, and cooling yarn is 12.5 micrometers, the thickness of the outer layer 1 is 2.5 micrometers, and the diameter of the core layer 2 is 10 micrometers. In this embodiment, the thermal conductivity of the outer layer 1 is 0.32 W / (m·K), which is 60% higher than that of pure PET yarn. A 180 g / m² off-white single-sided knitted plain weave fabric is produced using this yarn, with quick-drying properties including a moisture evaporation rate of 0.45 g / h, which is 125% higher than that of pure PA yarn; sun protection performance reaches a UPF value of 50+, an ultraviolet (280-400 nm) blocking rate of 99%, a sunlight (200-2500 nm) reflectivity of 81.3%, and an antibacterial rate of 97.2% against Staphylococcus aureus.

[0036] In an optional embodiment, the added nanoscale thermally conductive particles are alumina, with a particle size range of 100-2500 nm, a D50 of 300 nm, and an addition ratio of 20%. The diameter of the sun-protective, quick-drying, and cooling yarn is 15 micrometers, the thickness of the outer layer 1 is 3 micrometers, and the diameter of the core layer 2 is 12 micrometers. In this embodiment, the thermal conductivity of the outer layer 1 is 0.34 W / (m·K). Using this yarn, a 180 g / m² off-white single-sided knitted plain weave fabric is produced, with a moisture evaporation rate of 0.52 g / h, a sun protection performance of UPF 50+, a UV (280-400 nm) blocking rate of 99%, a solar (200-2500 nm) reflectance of 82.4%, and a Staphylococcus aureus antibacterial rate of 98.8%.

[0037] In an optional embodiment, the added nanoscale thermally conductive particles are hexagonal boron nitride, with a particle size range of 100-2500 nm, a D50 of 1000 nm, and an addition ratio of 10%. The diameter of the sun-protective, quick-drying, and cooling yarn is 10 micrometers, the thickness of the outer layer 1 is 1.5 micrometers, and the diameter of the core layer 2 is 8.5 micrometers. In this embodiment, the thermal conductivity of the outer layer 1 is 0.36 W / (m·K). Using this yarn, a 180 g / m² off-white single-sided knitted plain weave fabric is produced, with a moisture evaporation rate of 0.43 g / h, a sun protection performance of UPF 50+, a UV (280-400 nm) blocking rate of 99%, a solar (200-2500 nm) reflectivity of 72.4%, a 99.8% antibacterial rate against E. coli, and a resistance to ≥98.8% after 50 washes.

[0038] In an optional embodiment, the added nanoscale thermally conductive particles are zinc oxide, with a particle size range of 100-2500 nm, a D50 of 500 nm, and an addition ratio of 25%. The diameter of the sun-protective, quick-drying, and cooling yarn is 8 micrometers, the thickness of the outer layer 1 is 2 micrometers, and the diameter of the core layer 2 is 6 micrometers. In this embodiment, the thermal conductivity of the outer layer 1 is 0.36 W / (m·K), which is 80% higher than that of pure PET yarn. A 180 g / m² off-white single-sided knitted plain weave fabric is produced using this yarn, with quick-drying properties including a moisture evaporation rate of 0.55 g / h, which is 175% higher than that of pure PA yarn; the sun protection performance reaches a UPF value of 50+, an ultraviolet (280-400 nm) blocking rate of 99%, a sunlight (200-2500 nm) reflectivity of 83.6%, and an antibacterial rate of 99.3% against Staphylococcus aureus.

[0039] In other alternative embodiments, the added nanoscale thermally conductive particles include zinc oxide and aluminum oxide, or zinc oxide and hexagonal boron nitride, or aluminum oxide and hexagonal boron nitride.

[0040] In summary, in the bicomponent yarn of this invention, the core layer 2 is made of PA material, which ensures the yarn has a high specific heat capacity while enhancing its softness. The outer sheath layer 1 is made of high thermal conductivity PET, giving the yarn quick-drying and high thermal conductivity, thus improving heat dissipation. Furthermore, the nano-scale thermally conductive particles added to the sheath layer 1 give the yarn high reflectivity to sunlight and excellent antibacterial and bacteriostatic properties.

[0041] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0042] The above embodiments only illustrate several implementation methods of this utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A sun-protective, quick-drying, and cooling yarn, characterized in that, The sun-protective, quick-drying, and cooling yarn has a two-component core-sheath structure, which includes an inner core layer and an outer sheath layer. The core layer is made of polyamide, and the sheath layer is made of polyethylene terephthalate. The interior and / or surface of the skin layer are distributed with a number of thermally conductive particles; the thermally conductive particles are one of zinc oxide, aluminum oxide, and hexagonal boron nitride. When the thermally conductive particles are aluminum oxide, the thermal conductivity of the skin layer is greater than 0.32 W / (m·K). When the heat-conducting particles are zinc oxide, the thermal conductivity of the skin layer is 0.36 W / (m·K). When the thermally conductive particles are hexagonal boron nitride, the thermal conductivity of the skin layer is 0.36 W / (m·K).

2. The sun-protective, quick-drying, and cooling yarn according to claim 1, characterized in that, The particle size of the thermally conductive particles ranges from 100 to 2500 nanometers.

3. The sun-protective, quick-drying, and cooling yarn according to claim 1, characterized in that, The particle size D50 of the thermally conductive particles is 500 nanometers.

4. The sun-protective, quick-drying, and cooling yarn according to claim 1, characterized in that, The thermally conductive particles in the skin layer comprise 10% to 25% by mass.

5. The sun-protective, quick-drying, and cooling yarn according to claim 4, characterized in that, The thermally conductive particles are zinc oxide, and the zinc oxide particles account for 15% of the mass percentage in the skin layer.

6. The sun-protective, quick-drying, and cooling yarn according to claim 1, characterized in that, The diameter of the sun-protective, quick-drying, and cooling yarn is 10 to 20 micrometers, the thickness of the outer layer is 1 to 5 micrometers, and the diameter of the core layer is 8 to 15 micrometers.

7. The sun-protective, quick-drying, and cooling yarn according to claim 6, characterized in that, The yarn has a diameter of 12 micrometers, the sheath has a thickness of 2.5 micrometers, and the core has a diameter of 10 micrometers.

8. The sun-protective, quick-drying, and cooling yarn according to claim 1, characterized in that, The cross-section of the sun-protective, quick-drying, and cooling yarn is a concentric ring structure, with the inner core layer having a circular cross-section and the outer skin layer having an annular cross-section.

9. The sun-protective, quick-drying, and cooling yarn according to claim 1, characterized in that, The core layer is made of PA6.

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