Fiber material for single-layer high-shading curtain cloth and preparation method of fiber material

Abstract

The invention provides a fiber material for single-layer high-shading curtain cloth and a preparation method of the fiber material. The raw materials of the fiber material comprise modified polyethylene glycol terephthalate A and modified polyethylene glycol terephthalate B; wherein polymeric monomers of the modified polyethylene glycol terephthalate A are terephthalic acid and a monomer A; polymeric monomers of the modified polyethylene glycol terephthalate B are terephthalic acid, ethylene glycol and a monomer B; by modifying the monomer A and the monomer B, a high-conjugation system is introduced into molecular chains, and the interaction force between the molecular chains is improved, so that the fiber structure is more compact; not only is the mechanical property improved, but also the transmission path of light in the fiber can be reduced, and the shading property is improved; the modified fiber material is used for preparing the single-layer high-shading curtain cloth, so that the mechanical property, the shading property and the ultraviolet-proof property are enhanced, and the application range of the single-layer shading curtain cloth is widened.

Description

Technical Field

[0001] The present invention relates to the technical field of textile fabrics, and particularly relates to a fiber material for a single-layer high-shading curtain cloth and a preparation method thereof. Background Art

[0002] As a fabric with both functionality and decoration, the shading curtain cloth plays a crucial role in modern architecture, vehicle interiors, greenhouses, stage settings and other fields. It can not only effectively block ultraviolet rays, reduce heat radiation, but also regulate indoor light, protect furniture, floors, fabrics, etc. from fading and aging caused by direct sunlight, and at the same time improve the comfort of the living and working environment. In vehicle interiors, the shading curtain cloth can also improve privacy and prevent external peeping, providing a safer and quieter riding experience for passengers. In addition, the shading curtain cloth also has a positive effect on energy conservation. By reducing the rise of indoor temperature, the air-conditioning load is reduced, achieving the purpose of energy conservation and environmental protection.

[0003] According to the structural design of the fabric, the shading curtain cloth can be roughly divided into two types: single-layer and multi-layer. Among them, the single-layer shading curtain cloth is widely used in many occasions with moderate shading requirements and the pursuit of economy due to its simple structure, mature production process, light weight, low cost and convenient installation. The single-layer shading curtain cloth usually adopts high-density weaving technology or coats a shading coating on the fiber surface to achieve the blocking of light. This method not only ensures the basic shading effect, but also keeps the fabric with good air permeability and softness, meeting the basic requirements of indoor environment regulation.

[0004] However, the single-layer shading curtain cloth also has some deficiencies, and its shading effect is particularly weak in blocking ultraviolet rays. Due to possible slight defects in the fiber arrangement and coating uniformity of the single-layer structure, there are often tiny gaps in the fabric, allowing some ultraviolet rays to pass through, resulting in limited protection effect on indoor items. In addition, the weather resistance and anti-aging performance of the single-layer shading curtain cloth also need to be improved. When exposed to strong sunlight for a long time, the fabric surface is prone to phenomena such as fading and cracking, thus affecting its service life. To address these problems, the following are the main optimization directions for improving the anti-ultraviolet performance of the single-layer shading curtain cloth at present: First, an aromatic conjugated structure with high ultraviolet absorption ability can be introduced into the fiber molecular chain, and the π-π* transition mechanism is used to absorb and shield ultraviolet rays, thereby reducing the ultraviolet penetration rate; second, ultraviolet absorbers such as benzophenone and benzotriazole are incorporated during the production process, so that these highly efficient absorbers are evenly distributed inside the fabric to form a stable ultraviolet protection barrier; in addition, using nanotechnology to prepare an ultra-thin coating on the fabric surface, such as using inorganic anti-ultraviolet materials such as zinc oxide or titanium dioxide, can also significantly improve the anti-ultraviolet performance of the fabric, while taking into account weather resistance and wear resistance.

[0005] In summary, although the single-layer light-shielding curtain fabric has obvious advantages in terms of simple structure and cost, its key properties such as anti-ultraviolet and weather resistance still need to be further optimized and improved to achieve a more efficient and durable light-shielding protection effect. Summary of the Invention

[0006] Object of the Invention: The object of the present invention is to provide a fiber material for single-layer high light-shielding curtain fabric and its preparation method, which can improve the mechanical properties, aging resistance and anti-ultraviolet properties of conventional PET curtain fabric, overall enhance the comprehensive properties of the light-shielding curtain fabric material, and broaden the application range of single-layer light-shielding curtain fabric.

[0007] Technical Solution of the Present Invention: In the first aspect, the present invention provides a fiber material for single-layer high light-shielding curtain fabric, and the raw materials of the fiber material include modified polyethylene terephthalate A and modified polyethylene terephthalate B; Among them, the polymerization monomers of the modified polyethylene terephthalate A are terephthalic acid and monomer A; the polymerization monomers of the modified polyethylene terephthalate B are terephthalic acid, ethylene glycol and monomer B; The structural formula of the monomer A is shown in Formula I, and the structural formula of the monomer B is shown in Formula II; Formula I; Formula II.

[0008] In some embodiments, the mass ratio of the modified polyethylene terephthalate A to the modified polyethylene terephthalate B is 1:2 - 5; further, the mass ratio of the modified polyethylene terephthalate A to the modified polyethylene terephthalate B is 1:4.

[0009] In some embodiments, the number-average molecular weight of the modified polyethylene terephthalate A and the modified polyethylene terephthalate B is 20,000 - 3,000,000.

[0010] In some embodiments, the preparation method of the modified polyethylene terephthalate A includes the following steps: Step 1: Take 1-[2-(1H-1,2,3-benzotriazol-1-yl)-1,2-dichloroethyl]-1H-1,2,3-benzotriazole (CAS: 131543-68-5, hereinafter referred to as benzotriazole monomer) and a solvent and add them to a reactor, and stir evenly; dropwise add an aqueous solution of an alkali to the above mixed solution, and after the addition is completed, heat under reflux for reaction; after the reaction is completed, stop heating, cool to room temperature, neutralize the alkali solution, extract and dry to obtain an intermediate product; Step 2: Place the intermediate product in a reaction kettle, add absolute ethanol, and stir to dissolve; add a catalyst, and carry out a heating reaction under a hydrogen atmosphere. After the reaction is completed, cool, filter, and perform vacuum distillation to obtain monomer A; Step 3: Add terephthalic acid and monomer A to a reactor, add a catalyst, and carry out a reaction under heating reflux. After the reaction is completed, cool to room temperature, and obtain modified polyethylene terephthalate A masterbatch by pelletizing.

[0011] In some embodiments, the aqueous solution of the base is an aqueous solution of sodium hydroxide or an aqueous solution of potassium hydroxide; wherein, the molar ratio of 1-[2-(1H-1,2,3-benzotriazol-1-yl)-1,2-dichloroethyl]-1H-1,2,3-benzotriazole to OH - in the aqueous solution of the base is 1:5 - 7.

[0012] In some embodiments, in Step 1, the reaction is carried out under heating reflux, wherein the heating temperature is 60 - 80 °C and the reaction time is 6 - 8 h; in Step 3, the reaction is carried out under heating reflux, wherein the heating temperature is 200 - 300 °C and the reaction time is 2 - 5 h.

[0013] In some embodiments, the preparation method of the modified polyethylene terephthalate B includes the following steps: Step 1: Take 2,4-dibromo-1-aminonaphthalene (CAS: 20191-76-8) and a solvent and add them to a reactor, and stir evenly; dropwise add an aqueous solution of a base to the above mixed solution, and carry out a reaction under heating reflux after the addition is completed; after the reaction is completed, stop heating, cool to room temperature, neutralize the alkali solution, extract and dry to obtain monomer B; Step 2: Add terephthalic acid, ethylene glycol and monomer B to a reactor, add a catalyst, and carry out a reaction under heating reflux. After the reaction is completed, cool to room temperature, and obtain modified polyethylene terephthalate B masterbatch by pelletizing.

[0014] In some embodiments, the aqueous solution of the base is an aqueous solution of sodium hydroxide or an aqueous solution of potassium hydroxide; wherein, the molar ratio of 2,4-dibromo-1-aminonaphthalene to OH - is 1:5 - 7.

[0015] In some embodiments, the molar ratio of terephthalic acid, ethylene glycol and monomer B is 1:1.9 - 1.5:0.1 - 0.5.

[0016] By introducing a highly conjugated system (such as benzotriazole monomer or naphthalene ring) into the molecular chain of modified polyethylene terephthalate, the absorption ability of the material to ultraviolet light and even part of visible light can be significantly improved. These groups effectively capture light energy through π-π* transition, reduce the penetration of light, and improve the ultraviolet resistance of the fiber material.

[0017] Particularly, both the modified polyethylene terephthalate A and the modified polyethylene terephthalate B have amino groups, which can enhance the intermolecular force and make the fiber structure more compact. This is not only beneficial to the improvement of mechanical properties, but also can reduce the light transmission path inside the fiber and improve the light shielding property.

[0018] In some embodiments, the raw materials further include one or more combinations of a surfactant, an anti-blocking agent, a coupling agent, a dispersant, a dye, an ultraviolet absorber, an antioxidant, and an antibacterial agent.

[0019] In a second aspect, the present invention also provides a method for preparing the fiber material for the single-layer high-light-shielding curtain cloth, which specifically includes the following steps: Mix the modified polyethylene terephthalate A masterbatch, the modified polyethylene terephthalate B masterbatch with other raw materials, and then extrude through melt plasticization, cool and shape, and wind up to obtain the light-shielding and ultraviolet-proof fiber material.

[0020] Beneficial effects: 1. By modifying polyethylene terephthalate and introducing a highly conjugated system into the molecular chain, the absorption capacity of the material for ultraviolet rays and even some visible light can be significantly improved. These groups effectively capture light energy through π-π* transitions, reduce light penetration, and improve the ultraviolet resistance of the fiber material.

[0021] 2. Both the modified polyethylene terephthalate A and the modified polyethylene terephthalate B have amino groups, which can enhance the intermolecular force and make the fiber structure more compact; this is not only beneficial to the improvement of mechanical properties, but also can reduce the light transmission path inside the fiber and improve the light shielding property.

[0022] 3. The present invention obtains a fiber material with excellent ultraviolet resistance through modifying the molecular chain. Using the fiber material to prepare a single-layer high-light-shielding curtain cloth has excellent mechanical properties, light shielding property and ultraviolet-proof property, and broadens the application range of the single-layer light-shielding curtain cloth. Specific embodiments

[0023] The following will illustrate the present invention in combination with specific implementation schemes. It should be noted that the following examples are examples of the present invention, only for illustrating the present invention, and not for limiting the present invention. Other combinations and various improvements within the concept of the present invention can be made without departing from the main idea or scope of the present invention.

[0024] The chemical reagents used in the present invention are all ordinary commercially available analytical pure reagents without special instructions.

[0025] Preparation example of modified polyethylene terephthalate A Step 1: Take 10 g of 1-[2-(1H-1,2,3-benzotriazol-1-yl)-1,2-dichloroethyl]-1H-1,2,3-benzotriazole and 500 mL of dimethyl sulfoxide and add them to a reactor, and stir evenly; add an aqueous NaOH solution (100 ml, OH - content 1.7 mol) dropwise to the above mixed solution. After the addition is complete, heat to 70 °C and reflux for 8 h; after the reaction is completed, stop heating, cool to room temperature, neutralize the lye, extract and dry to obtain an intermediate product; Step 2: Place 10 g of the intermediate product in a reaction kettle, add 1 L of absolute ethanol, and stir to dissolve; add 0.1 g of Pd / C catalyst, pressurize to 2 atm under a hydrogen atmosphere, heat to 40 °C for reaction, and after the reaction is completed, cool, filter, and distill under reduced pressure to obtain monomer A; Use a Fourier transform infrared spectrometer and potassium bromide tablets to perform infrared spectral analysis on the ground powder of the synthesized monomer A. From the infrared spectrum of the reaction product, it can be seen that: There is a stretching vibration peak of NH-NH formed at 3200 cm -1 , indicating that hydrogen is added to the N=N double bond; there is an O-H stretching vibration at 3500 cm -1 , indicating that the original hydroxyl group exists and is close to overlapping with the N-H peak; there is a C=N stretching vibration peak at 1650 cm -1 , the benzotriazole is not affected, and C=N still exists; there is a stretching vibration of the aromatic ring at 3000 cm -1 . It shows that the above Step 1 and Step 2 have reacted successfully.

[0026] Step 3: Add 10 mol of terephthalic acid and 20 mol of monomer A to a reactor, add 2 mol of tetrabutyl titanate, heat to 200 °C and reflux for 4 h, after the reaction is completed, raise the temperature to 260 °C and maintain for 4 h, cool and solidify, and obtain the modified polyethylene terephthalate A masterbatch by pelletizing. Take a small amount of the masterbatch sample, dissolve it in a phenol / tetrachloroethane (1:1) solution, and measure Mn using gel permeation chromatography. The target Mn≈20000.

[0027] Preparation example of modified polyethylene terephthalate B Step 1: Take 10 g of 2,4-dibromo-1-aminonaphthalene and 500 mL of dimethyl sulfoxide and add them to a reactor, and stir evenly; add an aqueous NaOH solution (100 ml, OH - content 1.7 mol) dropwise to the above mixed solution. After the addition is complete, heat to 70 °C and reflux for 8 h; after the reaction is completed, stop heating, cool to room temperature, neutralize the lye, extract and dry to obtain monomer B; Using a Fourier transform infrared spectrometer, the ground powder of the synthesized monomer B was analyzed by infrared spectroscopy with potassium bromide tablets. From the infrared spectrum of the reaction product, it can be seen that: There is a relatively broad absorption peak at 3350 cm -1 for the amino group connected to the benzene ring; there is a C–H stretching vibration peak on the benzene ring at 3100 cm -1 ; there is an aromatic C=C stretching vibration at 1600 cm -1 ; there is an O-H stretching vibration at 3500 cm -1 . This indicates that the above step 1 was successfully reacted.

[0028] Step 2: Add 10 mol of terephthalic acid, 15 mol of ethylene glycol, and 5 mol of monomer B to a reactor, add 2 mol of tetrabutyl titanate, heat to reflux at 200 °C for 4 h, after the reaction is completed, raise the temperature to 260 °C and maintain for 4 h, and cool and solidify to obtain modified polyethylene terephthalate B masterbatch by pelletizing. Take a small amount of the masterbatch sample, dissolve it in a phenol / tetrachloroethane (1:1) solution, and measure Mn using gel permeation chromatography, with the target Mn≈20000.

[0029] Example 1 Add 70 parts of titanium dioxide, 80 parts of masterbatch material (a mixture of modified polyethylene terephthalate A masterbatch and modified polyethylene terephthalate B masterbatch in a mass ratio of 1:2), 10 parts of fumed silica, 1 part of vinyltriethoxysilane, and 3 parts of calcium stearate.

[0030] Place the above raw materials in a twin-screw extruder for extrusion granulation to obtain a polyester masterbatch; then perform melt spinning to obtain polyester fibers, which are subjected to doubling, spinning, and weaving to obtain a polyester fabric with a gram weight of 150 g / m 2 .

[0031] Example 2 Basically the same as Example 1, the difference is that the mass ratio of modified polyethylene terephthalate A masterbatch and modified polyethylene terephthalate B masterbatch is 1:4, polyester fibers are obtained, and after doubling, spinning, and weaving, a polyester fabric with a gram weight of 150 g / m 2 is obtained.

[0032] Example 3 Basically the same as Example 1, the difference is that the mass ratio of modified polyethylene terephthalate A masterbatch and modified polyethylene terephthalate B masterbatch is 1:5, polyester fibers are obtained, and after doubling, spinning, and weaving, a polyester fabric with a gram weight of 150 g / m 2 is obtained.

[0033] Comparative Example 1 Basically the same as Example 1, except that commercially available polyethylene terephthalate was used to replace the modified polyethylene terephthalate A masterbatch to prepare polyester fibers. After doubling twisting, spinning, and weaving, a polyester fabric with a weight of 150 g / m 2 was obtained.

[0034] Comparative Example 2 Basically the same as Example 1, except that commercially available polyethylene terephthalate was used to replace the modified polyethylene terephthalate B masterbatch to prepare polyester fibers. After doubling twisting, spinning, and weaving, a polyester fabric with a weight of 150 g / m 2 was obtained.

[0035] Comparative Example 3 Basically the same as Example 1, except that the modified polyethylene terephthalate B masterbatch was prepared by the following steps to obtain polyester fibers. After doubling twisting, spinning, and weaving, a polyester fabric with a weight of 150 g / m 2 was obtained.

[0036] Step 1: Take 10 g of 2,4-dibromo-1-aminonaphthalene and 500 mL of dimethyl sulfoxide and add them to a reactor, and stir evenly; add an aqueous NaOH solution (100 ml, OH - content 1.7 mol) dropwise to the above mixed solution. After the addition, heat to reflux at 70 °C for 8 h; after the reaction is completed, stop heating, cool to room temperature, neutralize the alkali solution, extract and dry to obtain monomer B; Step 2: Add 10 mol of terephthalic acid and 20 mol of monomer B to a reactor, add 2 mol of tetrabutyl titanate, heat to reflux at 200 °C for 2 h, after the reaction is completed, raise the temperature to 260 °C and keep it for 2 h, cool and solidify, and obtain the modified polyethylene terephthalate B masterbatch by pelletizing. Take a small amount of the masterbatch sample, dissolve it in a phenol / tetrachloroethane (1:1) solution, and measure Mn using gel permeation chromatography. The target Mn≈20000.

[0037] Comparative Example 4 Basically the same as Example 1, except that polyethylene terephthalate was used to replace the modified polyethylene terephthalate A masterbatch and the modified polyethylene terephthalate B masterbatch to prepare polyester fibers. After doubling twisting, spinning, and weaving, a polyester fabric with a weight of 150 g / m 2 was obtained; the polyethylene terephthalate was prepared by the following steps.

[0038] 10 mol of terephthalic acid and 20 mol of ethylene glycol were added to a reactor, 2 mol of tetrabutyl titanate was added, and the mixture was heated to reflux at 200 °C for 2 h. After the reaction, the temperature was raised to 260 °C and maintained for 2 h, and then cooled and solidified to obtain modified polyethylene terephthalate B masterbatch by pelletizing. A small amount of masterbatch sample was taken, dissolved in a phenol / tetrachloroethane (1:1) solution, and Mn was measured using gel permeation chromatography. The target Mn ≈ 20000.

[0039] Performance test: The polyester fabrics prepared in each example and comparative example were cut into 10 cm × 10 cm squares, and the polyester fibers and polyester fabrics in each example and comparative example were tested as follows: 1. Tensile strength: The mechanical properties of the fibers were tested using a multifilament strength and elongation tester. The clamped fiber length was 200 mm, the stretching rate was 200 mm / min, the pre-tension was 5 cN, and the average value was taken after measuring 20 times for each group of fibers.

[0040] 2. Anti-ultraviolet performance test: The anti-ultraviolet performance of the fabric was tested according to GB / T 18830—2009 "Evaluation of anti-ultraviolet performance of textiles". The higher the ultraviolet protection factor UPF value, the better the anti-ultraviolet performance.

[0041] 3. Light-shielding rate: The light-shielding rate was tested with reference to the standard T / CTES1012-2018 "Test method for light-shielding performance of textiles and related materials - Illuminometer method".

[0042] The test results are shown in the following table.

[0043] It can be found from the above table that the mechanical properties, anti-ultraviolet oxidation properties, and light-shielding effects of Examples 1-3 are relatively excellent. It shows that using modified polyethylene terephthalate as a carrier, a high conjugate system (such as benzotriazole monomer or naphthalene ring) significantly improves the absorption ability of polyethylene terephthalate to ultraviolet rays and even some visible light, making it have strong light-shielding properties and anti-ultraviolet oxidation properties, which is more convenient for the application of polyethylene terephthalate in single-layer light-shielding curtain fabrics.

[0044] In Comparative Examples 1-2, the modified polyethylene terephthalate A masterbatch and the modified polyethylene terephthalate B masterbatch were not added respectively, and the breaking strength and light shielding property of the prepared polyester fibers and polyester fabrics were significantly reduced. This is because both the modified polyethylene terephthalate A and the modified polyethylene terephthalate B have amino groups, which can enhance the intermolecular interaction force and make the fiber structure more compact; when a certain component is lacking, the formation of intermolecular hydrogen bonds is reduced, thereby reducing the mechanical properties and light shielding property. It shows that when the modified polyethylene terephthalate A masterbatch and the modified polyethylene terephthalate B masterbatch are used together, they have a synergistic effect.

[0045] In Comparative Example 3, ethylene glycol was not added when preparing the modified polyethylene terephthalate B masterbatch. It can be found that the performance of Comparative Example 3 also decreased slightly compared with the Examples. It is speculated that the molecular chain of the modified polyethylene terephthalate prepared only by polymerizing terephthalic acid and monomer B is too hard to be arranged orderly, which hinders the formation of a denser internal structure of the molecular chain, thereby affecting the light shielding property.

[0046] The present invention can also have various other embodiments. Without departing from the spirit and essence of the present invention, those skilled in the art can make various corresponding changes and deformations according to the present invention. However, these corresponding changes and deformations should all fall within the protection scope of the appended claims of the present invention.

Claims

1. A fiber material for a single-layer high-light-blocking curtain fabric, characterized in that, The raw materials of the fiber material include modified polyethylene terephthalate A and modified polyethylene terephthalate B; Among them, the polymerization monomers of the modified polyethylene terephthalate A are terephthalic acid and monomer A; the polymerization monomers of the modified polyethylene terephthalate B are terephthalic acid, ethylene glycol and monomer B; The structural formula of the monomer A is shown in Formula I, and the structural formula of the monomer B is shown in Formula II; Formula I; Formula II.

2. The fibrous material according to claim 1, characterized in that, The mass ratio of the modified polyethylene terephthalate A to the modified polyethylene terephthalate B is 1:2 - 5.

3. The fibrous material according to claim 1, characterized in that, The number-average molecular weight of the modified polyethylene terephthalate A and the modified polyethylene terephthalate B is 20,000 - 3,000,000.

4. The fiber material according to claim 1, wherein The preparation method of the modified polyethylene terephthalate A includes the following steps: Step 1: Take 1-[2-(1H-1,2,3-benzotriazol-1-yl)-1,2-dichloroethyl]-1H-1,2,3-benzotriazole and a solvent and add them to a reactor, and stir evenly; add an aqueous solution of an alkali dropwise to the above mixed solution, and after the addition is completed, heat under reflux for reaction; after the reaction is completed, stop heating, cool to room temperature, neutralize the alkali solution, extract and dry to obtain an intermediate product; Step 2: Place the intermediate product in a reaction kettle, add absolute ethanol, and stir to dissolve; add a catalyst, and carry out a heating reaction under a hydrogen atmosphere. After the reaction is completed, cool, filter, and carry out vacuum distillation to obtain monomer A; Step 3: Add terephthalic acid and monomer A to a reactor, add a catalyst, and heat under reflux for reaction. After the reaction is completed, cool to room temperature, and obtain the masterbatch of modified polyethylene terephthalate A by pelletizing.

5. The fibrous material according to claim 4, characterized in that, The aqueous solution of the base is an aqueous solution of sodium hydroxide or an aqueous solution of potassium hydroxide; wherein, the molar ratio of 1-[2-(1H-1,2,3-benzotriazol-1-yl)-1,2-dichloroethyl]-1H-1,2,3-benzotriazole to OH in the aqueous solution of the base - is 1:5-7.

6. The fiber material according to claim 4, wherein In the reaction of heating under reflux in Step 1, the heating temperature is 60 - 80 °C, and the reaction time is 6 - 8 h; in the reaction of heating under reflux in Step 3, the heating temperature is 200 - 300 °C, and the reaction time is 2 - 5 h.

7. The fibrous material according to claim 1, wherein The preparation method of the modified polyethylene terephthalate B includes the following steps: Step 1: Take 2,4-dibromo-1-aminonaphthalene and a solvent and add them to a reactor, and stir evenly; add an aqueous solution of an alkali dropwise to the above mixed solution, and after the addition is completed, heat under reflux for reaction; after the reaction is completed, stop heating, cool to room temperature, neutralize the alkali solution, extract and dry to obtain monomer B; Step 2: Add terephthalic acid, ethylene glycol and monomer B to a reactor, add a catalyst, and heat under reflux for reaction. After the reaction is completed, cool to room temperature, and obtain the masterbatch of modified polyethylene terephthalate B by pelletizing.

8. The fibrous material according to claim 7, wherein, The molar ratio of the terephthalic acid, ethylene glycol and monomer B is 1:1.9 - 1.5:0.1 - 0.

5.

9. The fibrous material according to claim 1, wherein The raw materials also include one or more combinations of a surfactant, an anti-blocking agent, a coupling agent, a dispersant, a dye, an ultraviolet absorber, an antioxidant, and an antibacterial agent.

10. The preparation method of the fiber material according to any one of claims 1-9, characterized in that, Including the following steps: Mix the masterbatch of modified polyethylene terephthalate A, the masterbatch of modified polyethylene terephthalate B with other raw materials, and then carry out melt plasticization extrusion, cooling and shaping, and winding to obtain the fiber material with light-shielding and ultraviolet protection properties.

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