High-sunscreen and anti-transparent fiber as well as preparation method and application thereof

Abstract

The invention discloses a highly sunscreen and anti-transparent fiber which comprises a core layer structure and a skin layer structure from inside to outside, and the highly sunscreen and anti-transparent fiber comprises a straight structure and a protruding structure in the horizontal direction. According to the sun-resistant fabric, the fiber yarn with the special-shaped section and the skin-core structure design is adopted, the obtained fabric has the excellent sun-resistant effect, the uvioresistant UPF reaches up to 1000 +, and the UVA penetration rate is far lower than 5%. 10-20 wt% of the sun-screening agent can be loaded in the fiber, the mechanical strength of the high-sun-screening and anti-permeation fiber cannot be affected on the basis that the excellent sun-screening effect is achieved, and the problem that the dosage of the sun-screening agent in conventional sun-screening yarn cannot be limited by 2% generally is solved. The functional attributes of sun protection and privacy protection are considered, the fabric has good washing resistance, and meanwhile a better instant contact cold feeling effect is achieved.

Description

Technical Field

[0001] The invention relates to the field of blended yarns or yarns containing different materials, and in particular to a high sun-proof and anti-penetration fiber and a preparation method and application thereof. Background Art

[0002] As people pay more attention to their physical health, outdoor sports are becoming more and more popular. Long-term outdoor sports will affect the health of the skin and increase the risk of skin cancer. Therefore, it is particularly important to develop fabrics with high sun protection performance. Sun protection fabrics are usually achieved by adding UV absorbers or by circular, special-shaped and other sun protection fiber structure designs. Such fabrics can effectively block the penetration of ultraviolet rays and provide necessary skin protection. However, in addition to the sun protection function, the anti-transparency of the fabric is also an important factor that cannot be ignored in the design. Highly anti-transparency fabrics can effectively prevent internal objects or skin contours from being seen through, ensuring the privacy and comfort of the wearer. This demand is particularly important in the application of light outdoor clothing and golf pants.

[0003] Chinese invention patent CN109457322A discloses a sunscreen cool feeling fiber and a preparation method thereof, wherein modified bamboo powder and nano ZnO are used as fillers to modify polyamide to prepare a fiber core material, and modified nano AlN and nano TiO2 are used to modify polyurethane to prepare a fiber skin material, and finally melt spinning is used to prepare an eccentric skin-core composite fiber, and the prepared fiber has both sunscreen and cool feeling functions, but the preparation process is complicated and the production cost is high, and the conventional circular cross-section eccentric structure is adopted, and it does not have an anti-transmission function. Chinese invention patent CN118639377A discloses a preparation method of sunscreen clothing fabric with heat shielding and cooling function, adopts a skin-core structure spinning method, and realizes more efficient heat shielding and cooling and sunscreen performance by increasing the amount of powder added, which not only has excellent anti-ultraviolet and contact cool feeling effects, but also has powerful heat shielding and cooling, and effective antibacterial effects, but it also adopts a conventional circular cross-section skin-core structure, and the anti-transmission effect is limited. Chinese invention patent CN115386998B discloses an anti-ultraviolet and anti-transmission fabric and its preparation process. The polyester in the system uses fully matte profiled cross-section yarn, and the profiled cross-section is W-shaped fiber, which makes the prepared fabric softer under light. Combined with the special warp yarn, weft yarn and organizational structure used, it has excellent anti-ultraviolet and anti-transmission properties, but the anti-transmission effect is limited. Summary of the invention

[0004] In order to develop a sports fabric that has excellent sun protection effect and is light and non-transparent to the skin, the first aspect of the present invention provides a high sun protection and anti-permeability fiber, which includes a core layer structure and a skin layer structure from the inside to the outside, and includes a straight structure and a protruding structure in the horizontal direction.

[0005] As a preferred embodiment, the protruding structure is located at the end of the high sun-proof and anti-penetration fiber, and the straight structure is located in the middle of the high sun-proof and anti-penetration fiber.

[0006] As a preferred embodiment, the core layer structure includes a straight structure I and a protruding structure I; the skin layer structure includes a straight structure II and a protruding structure II.

[0007] As a preferred embodiment, the protruding structure I is covered by the protruding structure II, and the straight structure I is covered by the straight structure II and the protruding structure II.

[0008] The inventor found in the experiment that by adding titanium dioxide to nylon fiber and using fiber yarn with special profiled cross-section and skin-core structure design, the obtained fabric has excellent sun protection effect and anti-perspective property. The possible reason is that the fiber with special profiled cross-section used in the present invention can obtain a larger fiber surface area, which can increase the diffuse reflection of light and improve the sun protection effect. Moreover, the larger fiber surface area can load more sunscreen, so that the fiber yarn has excellent sun protection effect without losing the mechanical strength of the yarn.

[0009] As a preferred embodiment, the diameter of the protruding structure II is 0.01-0.02 mm, and the height of the straight structure II is 0.004-0.006 mm.

[0010] As a preferred embodiment, the mass ratio of the core layer structure to the skin layer structure is 1:(0.9-3).

[0011] As a preferred implementation, the mass ratio of the core layer structure to the skin layer structure is 1:1.

[0012] As a preferred embodiment, the raw materials for preparing the core layer structure and the skin layer structure include synthetic fibers and sunscreen agents. In terms of weight percentage, the core layer structure includes 80-90% synthetic fibers and 10-20% sunscreen agents, and the skin layer structure includes 95-99% synthetic fibers and 1-5% sunscreen agents.

[0013] As a preferred embodiment, the core layer structure comprises 83-88% of synthetic fibers and 12-17% of sunscreens, and the skin layer structure comprises 96-98% of synthetic fibers and 2-4% of sunscreens.

[0014] As a preferred embodiment, the core layer structure comprises 85% synthetic fibers and 15% sunscreen, and the skin layer structure comprises 98% synthetic fibers and 2% sunscreen.

[0015] The inventor further found that the skin layer of the fiber's skin-core structure includes 2wt% titanium dioxide, the core layer includes 15wt% titanium dioxide, and the skin layer and the core layer adopt a weight ratio of 1:1. The sunscreen effect of the formed fiber is significantly improved, and it will not affect the mechanical strength of the yarn. The reason may be: the fiber adopts a concentric skin-core structure, and the sunscreen effective substances are concentrated in the core layer at a higher proportion, while the skin layer adopts a conventional low proportion, ensuring that the proportion of synthetic fibers in the skin layer is 95-99%. While adding a higher proportion of effective substances that can enhance sunscreen and anti-transmission, the strength and structural stability of the fiber are ensured. In addition, the fabric has good matte properties and excellent water-resistant properties.

[0016] As a preferred embodiment, the sunscreen is selected from at least one of benzophenone ultraviolet absorbers, salicylate, titanium dioxide, zinc oxide, and methylcellulose zinc oxide.

[0017] As a preferred embodiment, the sunscreen is selected from at least one of titanium dioxide and zinc oxide.

[0018] As a preferred embodiment, the sunscreen is titanium dioxide.

[0019] As a preferred embodiment, the synthetic fiber includes but is not limited to one or a combination of nylon, polyester, polypropylene, and spandex.

[0020] As a preferred embodiment, the synthetic fiber is nylon.

[0021] A second aspect of the present invention provides a method for preparing a high sun-proof and anti-transmission fiber, comprising the following steps:

[0022] S1 prepares polymer A for the core layer structure and premixes it for later use;

[0023] S2 prepares polymer B for preparing the cortical structure, premixes it for later use;

[0024] S3: feeding the premixed polymer A and polymer B simultaneously through different feed ports, and heating and melting the polymer A and polymer B;

[0025] After S4 melts, polymer A and polymer B are extruded through specific special-section spinnerets to continuously form high sun-proof and anti-transmission functional fibers with a skin layer and a core layer along the longitudinal direction of the fiber.

[0026] As a preferred embodiment, the melting temperature of the mixture in step S3 is 240-250°C.

[0027] The third aspect of the present invention provides an application of a high sun-proof and anti-transmission fiber, which is used to prepare a high sun-proof and anti-transmission fabric.

[0028] Compared with the prior art, the present invention has the following beneficial effects:

[0029] (1) The high sun protection and anti-penetration fiber of the present invention adopts fiber yarn with special profile cross section and skin-core structure design, and the obtained fabric has excellent sun protection effect, with UV resistance UPF as high as 1000+ and UVA penetration rate far less than 5%.

[0030] (2) The high sunscreen and anti-penetration fiber of the present invention can be loaded with 10-20wt% of sunscreen agent. On the basis of having excellent sunscreen effect, it will not affect the mechanical strength of the high sunscreen and anti-penetration fiber, thus solving the problem that the amount of sunscreen agent in conventional sunscreen yarn cannot exceed the 2% limit.

[0031] (3) The high sun-proof and anti-transmission fiber of the present invention has a good matte finish for the fabric produced. The special special-shaped cross-section and skin-core structure design used in combination improves the anti-transmission property of the fiber, while taking into account the functional properties of sun protection and privacy protection.

[0032] (4) The high sun-proof and anti-transmission fiber described in the present invention relies on fiber yarns with special special-shaped cross-sections and skin-core structure designs. The sun-proof and anti-transmission functions are permanent functions, and the fiber has good water-washing resistance. Washing will not affect the sun-proof and anti-transmission effects of the fabric.

[0033] (5) The high sun protection and anti-transmission fiber of the present invention has a special profile cross-section design, which increases the surface area of ​​the fiber, increases the contact area between the fabric and the skin, enhances the thermal conductivity of the material, and obtains a better instantaneous cooling effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 This is a schematic diagram of the cross-sectional structure of the high sun-proof and anti-transmission fiber of Example 1 of the present invention.

[0035] In the figure: 1. Core structure; 2. Skin structure; 1-1: Straight structure I; 1-2: Protruding structure I; 2-3: Protruding structure II; 2-4: Straight structure II. a: Diameter of protruding structure II; b: Diameter of straight structure II.

[0036] Figure 2 This is an anti-perspective effect diagram of the fiber prepared in Example 2;

[0037] Figure 3 This is an anti-perspective effect diagram of the sun-proof and anti-transmission fiber prepared in Example 3;

[0038] Figure 4 This is a diagram showing the anti-perspective effect of the high sun-proof and anti-transmission fiber prepared in Example 1. DETAILED DESCRIPTION

[0039] Example 1

[0040] A high sun protection and anti-transmission fiber, the cross-sectional structure diagram of which is shown in Figure 1 The high sun-proof and anti-penetration fiber includes a core layer structure 1 and a skin layer structure 2 from the inside to the outside, and the high sun-proof and anti-penetration fiber includes a straight structure and a protruding structure in the horizontal direction.

[0041] The protruding structure is located at the end of the high sun-proof and anti-penetration fiber, and the straight structure is located in the middle of the high sun-proof and anti-penetration fiber.

[0042] The core layer structure 1 includes a straight structure Ⅰ1-1 and a protruding structure Ⅰ1-2; the skin layer structure 2 includes a straight structure Ⅱ2-4 and a protruding structure Ⅱ2-3. The protruding structure Ⅰ1-2 is covered by the protruding structure Ⅱ2-3, and the straight structure Ⅰ1-1 is covered by the straight structure Ⅱ2-4 and the protruding structure Ⅱ2-3.

[0043] The diameter a of the protruding structure II is 0.01-0.02 mm, and the height b of the straight structure II is 0.004-0.006 mm.

[0044] The mass ratio of the core layer structure to the skin layer structure is 1:1.

[0045] The raw materials for preparing the core layer structure and the skin layer structure include synthetic fibers and sunscreen agents. In terms of weight percentage, the core layer structure includes 85% synthetic fibers and 15% sunscreen agents, and the skin layer structure includes 98% synthetic fibers and 2% sunscreen agents.

[0046] The sunscreen is titanium dioxide. The synthetic fiber is nylon, which is commonly available in the market.

[0047] A method for preparing a highly sun-proof and anti-transmission fiber comprises the following steps:

[0048] S1 prepares polymer A for the core layer structure and premixes it for later use;

[0049] S2 prepares polymer B for preparing the cortical structure, premixes it for later use;

[0050] S3: feeding the premixed polymer A and polymer B simultaneously through different feed ports, and heating and melting the polymer A and polymer B;

[0051] After S4 melts, polymer A and polymer B are extruded through specific special-section spinnerets to continuously form high sun-proof and anti-transmission functional fibers with a skin layer and a core layer along the longitudinal direction of the fiber.

[0052] Anti-see-through effect Figure 4 .

[0053] Example 2

[0054] A fiber, the specific implementation method is the same as the embodiment, the difference is that the fiber has a circular cross-section and a non-skin-core structure, and the preparation raw materials include synthetic fibers and sunscreen agents, which include 98% synthetic fibers and 2% sunscreen agents by weight percentage.

[0055] The sunscreen is titanium dioxide. The synthetic fiber is nylon.

[0056] A method for preparing a fiber comprises the following steps:

[0057] S1 prepares raw materials for fiber preparation and premixes them for later use;

[0058] S2 feeds the premixed fiber preparation raw materials through the feed port, and the mixture is melted at 240-250°C;

[0059] The molten mixture of S3 is ejected through a spinneret of a circular die to obtain fibers.

[0060] Anti-see-through effect Figure 2 .

[0061] Example 3

[0062] A sun-proof and anti-penetration fiber, the specific implementation manner is the same as the embodiment, the difference is that the sun-proof and anti-penetration fiber is a non-skin-core structure with a special-shaped cross-section and does not contain a core layer.

[0063] A method for preparing a fiber comprises the following steps:

[0064] S1 prepares raw materials for fiber preparation and premixes them for later use;

[0065] S2 feeds the premixed fiber preparation raw materials through the feed port, and the mixture is melted at 240-250°C;

[0066] The melted mixture of S4 is extruded through a spinneret hole with a specific profile to obtain a sun-proof and anti-penetration fiber.

[0067] Anti-see-through effect Figure 3 .

[0068] Performance Testing

[0069] The fibers of Example 1 were woven using conventional weaving techniques to obtain fabrics, and the following performance tests were performed.

[0070] Fabric content: 85wt% nylon 15wt% spandex, fabric structure: 65D / 48F FD DTY+40D SCY SX65D / 48F FD DTY+40D SCY S; weight (g / m 2 )160; width (inches)56.

[0071] 1. Sunscreen effect test: Refer to the solar ultraviolet radiation protection performance of Example 1 of the AATCC183-2020 standard test. The test results are shown in Table 1.

[0072] Table 1

[0073] Test value Standard value - UV Protection UPF 1456.48 ＞40 pass UVA penetration rate / % 0.47 ＜5 pass

[0074] 2. Test of instant cool feeling performance: The instant cool feeling performance of Example 1 was tested with reference to the standard of GB / T35263-2017, and the test results are shown in Table 2. The temperature difference between the thermal detection plate and the sample stage was 15°C, the temperature of the thermal detection plate was 35±0.5°C, and the temperature of the sample stage was 20±0.5°C.

[0075] Table 2

[0076] Test value Standard value <![CDATA[Instant contact cool feeling performance (J / cm 2 s)]]> 0.23 ≥0.15 pass

[0077] 3. Anti-transmission effect test: Place the prepared fabric on top of the same pattern and directly compare the perspective effect diagram. Figure 2-4 The anti-seepage effect of the fiber of Example 1 after being prepared into fabric by conventional process is shown in Figure 4 The anti-seepage effect of the fiber of Example 2 after being prepared into fabric by conventional process is shown in Figure 2 The anti-seepage effect of the fiber of Example 3 after being prepared into fabric by conventional process is shown in Figure 3 It can be seen from the figure that the anti-perspective effect of Example 2 is very poor, the anti-perspective effect of Example 3 has a certain improvement, and the anti-perspective effect of Example 4 is the best.

[0078] 4. Comprehensive performance: The test methods and test results are shown in Table 3 below.

[0079] Table 3

[0080]

[0081]

Claims

1. A high sun-proof and anti-penetration fiber, characterized in that: The high sun protection and anti-penetration fiber comprises a core layer structure and a skin layer structure from the inside to the outside, and the high sun protection and anti-penetration fiber comprises a straight structure and a protrusion structure in the horizontal direction.

2. The high sun protection and anti-penetration fiber according to claim 1, characterized in that: The protruding structure is located at the end of the high sun-proof and anti-penetration fiber, and the straight structure is located in the middle of the high sun-proof and anti-penetration fiber.

3. The high sun protection and anti-penetration fiber according to claim 1, characterized in that: The core layer structure includes a straight structure I and a protruding structure I; the skin layer structure includes a straight structure II and a protruding structure II.

4. The high sun-proof and anti-penetration fiber according to claim 3, characterized in that: The protruding structure I is covered by the protruding structure II, and the straight structure I is covered by the straight structure II and the protruding structure II.

5. The high sun protection and anti-penetration fiber according to claim 3, characterized in that: The diameter of the protruding structure II is 0.01-0.02 mm, and the height of the straight structure II is 0.004-0.006 mm.

6. The high sun-proof and anti-penetration fiber according to claim 1, characterized in that: The mass ratio of the core layer structure to the skin layer structure is 1:(0.9-3).

7. The high sun-proof and anti-penetration fiber according to claim 1, characterized in that: The raw materials for preparing the core layer structure and the skin layer structure include synthetic fibers and sunscreen agents. In terms of weight percentage, the core layer structure includes 80-90% synthetic fibers and 10-20% sunscreen agents, and the skin layer structure includes 95-99% synthetic fibers and 1-5% sunscreen agents.

8. The high sun protection and anti-penetration fiber according to claim 7, characterized in that: The sunscreen is selected from at least one of benzophenone ultraviolet absorbers, salicylate, titanium dioxide, zinc oxide, and methylcellulose zinc oxide.

9. A method for preparing the highly sun-proof and anti-penetration fiber according to any one of claims 1 to 8, characterized in that: The following steps are involved: S1 prepares polymer A for the core layer structure and premixes it for later use; S2 prepares polymer B for preparing the cortical structure, premixes it for later use; S3: feeding the premixed polymer A and polymer B simultaneously through different feed ports, and heating and melting the polymer A and polymer B; After S4 is melted, polymer A and polymer B are extruded through specific spinnerets to continuously form high sun-proof and anti-transmission functional fibers with a skin layer and a core layer along the longitudinal direction of the fiber.

10. An application of the high sun-proof and anti-penetration fiber according to any one of claims 1 to 8, characterized in that: It is used to prepare highly sun-proof and anti-transmittance fabrics.

Images