CN116949595A - Ultraviolet-proof yarn and preparation method thereof - Google Patents
Ultraviolet-proof yarn and preparation method thereof Download PDFInfo
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- CN116949595A CN116949595A CN202310925472.7A CN202310925472A CN116949595A CN 116949595 A CN116949595 A CN 116949595A CN 202310925472 A CN202310925472 A CN 202310925472A CN 116949595 A CN116949595 A CN 116949595A
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Abstract
The application relates to the technical field of textile, in particular to an ultraviolet-proof yarn and a preparation method thereof, wherein the ultraviolet-proof yarn is prepared from the following raw materials in parts by weight: 5-10 parts of ultraviolet-proof master batch and 90-95 parts of polyester chip; the ultraviolet-proof master batch is prepared from the following raw materials in parts by mass: 20-30 parts of modified nano ultraviolet-proof material, 1-3 parts of coupling agent, 0.1-0.3 part of antioxidant and 70-80 parts of ester substance; the modified nanometer ultraviolet-proof material is obtained by modifying nanometer ultraviolet-proof agent by acrylate monomer and fluorine-containing monomer. According to the application, the nanometer ultraviolet inhibitor is modified by the acrylic ester monomer and the fluorine-containing monomer and then mixed with the ester substance to form the ultraviolet-proof master batch, so that the compatibility of the ultraviolet-proof master batch and the polyester chip and the dispersion uniformity in the prepared fiber are improved, and the ultraviolet-proof performance of the prepared yarn is improved.
Description
Technical Field
The application relates to the technical field of textile, in particular to an ultraviolet-proof yarn and a preparation method thereof.
Background
With the development of modern industry, the ozone layer in the atmosphere is continuously destroyed, and excessive ultraviolet rays are driven in. Studies have shown that: the proper irradiation of ultraviolet is beneficial to human health, but excessive ultraviolet receiving can promote the denaturation of nucleic acid or protein in skin cells, red spots and skin aging can occur after long-term irradiation, skin cancer can be caused when serious, and therefore, the ultraviolet-proof performance of the yarn fabric is important.
At present, the main methods for preparing the ultraviolet-proof yarn include a fabric after-finishing method, spinning of the ultraviolet-proof yarn and the like. The fabric after-finishing method has the advantages of convenience, flexibility, easiness in mass production and the like, but the fabric prepared by the method has stiff hand feeling, stuffiness when being worn, and poor durability and washing fastness. The ultraviolet-resistant yarn is generally spun by adding the ultraviolet-resistant agent in the spinning process, the adopted ultraviolet-resistant agent needs to adopt an ultraviolet-resistant material with small particle size, but the ultraviolet-resistant material with small particle size can be aggregated, so that the problems of difficult spinning forming, uneven distribution of the ultraviolet-resistant agent in the fiber, poor mixing effect and the like are caused, and the final ultraviolet-resistant effect of the yarn is poor.
Therefore, the improvement of the ultraviolet resistance of the yarn has important significance for the development of fabrics.
Disclosure of Invention
The application provides an ultraviolet-proof yarn and a preparation method thereof in order to improve the uniformity and the mixing effect of ultraviolet-proof materials in fibers and further improve the ultraviolet-proof performance of the yarn.
In a first aspect, the present application provides an anti-ultraviolet yarn, which adopts the following technical scheme:
an ultraviolet-proof yarn is prepared from the following raw materials in parts by weight: 5-10 parts of ultraviolet-proof master batch and 90-95 parts of polyester chip; the ultraviolet-proof master batch is prepared from the following raw materials in parts by mass: 20-30 parts of modified nano ultraviolet-proof material, 1-3 parts of coupling agent, 0.1-0.3 part of antioxidant and 70-80 parts of ester substance; the modified nanometer ultraviolet-proof material is obtained by modifying nanometer ultraviolet-proof agent by acrylate monomer and fluorine-containing monomer.
By adopting the technical scheme, the acrylate and the fluorine-containing monomer are used for carrying out grafting modification on the nano ultraviolet inhibitor, so that the nanoparticle composite microsphere which is uniformly dispersed in a disperse phase is generated, the dispersion stability of the nanoparticle is improved, and the defects of easy agglomeration and difficult dispersion during high-speed shearing dispersion and ultrasonic dispersion treatment of nanoparticle aqueous dispersion are avoided, so that the nano effect of the nano ultraviolet inhibitor is fully exerted; meanwhile, the modified nano ultraviolet-proof material contains fluorine monomer, so that the surface tension of the graft copolymer is reduced, the compatibility of the graft copolymer with other components is improved, and interface defects are not easy to form.
According to the application, the ultraviolet-proof master batch formed by mixing the modified nanometer ultraviolet-proof material and the ester substance has good dispersion stability and spinning characteristics, so that the compatibility of the ultraviolet-proof master batch with polyester chips is improved, the ultraviolet-proof performance of the yarn is improved, and the spinning effect is also improved.
In a specific embodiment, the method for preparing the modified nano ultraviolet protection material comprises the following steps:
dissolving the nano ultraviolet-proof agent and the silane coupling agent with the mass ratio of (5-10) being 1 in absolute ethyl alcohol, uniformly stirring, heating for reaction, drying and grinding to obtain modified nano ultraviolet-proof particles;
adding the modified nano ultraviolet-proof particles into a polymeric emulsifier aqueous solution, uniformly stirring, adding an initiator, an acrylic ester monomer and a fluorine-containing monomer for reaction, and filtering to obtain the ultraviolet-proof nano ultraviolet-proof emulsion; the mass ratio of the modified nanometer ultraviolet-proof particles to the acrylic ester monomer to the fluorine-containing monomer is 1 (3-5): 1.
by adopting the technical scheme, the preparation method is simple, and the prepared modified nano ultraviolet-proof material has good dispersion stability and ultraviolet-proof performance.
In a specific embodiment, the nano ultraviolet inhibitor is one or more of nano zinc oxide, nano titanium oxide, nano cerium oxide and nano iron oxide.
By adopting the technical scheme, zinc oxide belongs to an N-type semiconductor, electrons on a valence band can receive energy in ultraviolet rays to generate transition, and the principle of absorbing ultraviolet rays is that the zinc oxide absorbs the ultraviolet rays. The function of scattering ultraviolet rays is related to the particle size of the material, and when the size is far smaller than the wavelength of the ultraviolet rays, the particles can scatter the ultraviolet rays acted on the particles in all directions, so that the ultraviolet ray intensity in the irradiation direction is reduced; nano zinc oxide is a stable compound that can provide broad spectrum ultraviolet protection (UVA and UVB) while also having antibacterial and anti-inflammatory effects.
The ultraviolet resistance of nano titanium dioxide is due to the high light refraction and high light activity. The ultraviolet resistance and mechanism are related to the particle size: when the particle size is large, the blocking of ultraviolet rays is mainly reflected and scattered, and the ultraviolet rays in a medium wave area and a long wave area are effective. The sun-screening mechanism is simple covering, belongs to general physical sun screening, and has weaker sun-screening capability. With the reduction of the particle size, light can penetrate through the particle surface of the nano titanium dioxide, the reflection and scattering properties of the ultraviolet rays in a long wave region are not obvious, and the absorption properties of the ultraviolet rays in a medium wave region are obviously enhanced. The sun protection mechanism is that ultraviolet rays are absorbed, and ultraviolet rays in a medium wave area are mainly absorbed.
The nano cerium oxide is rare earth oxide with low cost and extremely wide application, has small particle size, uniform particle size distribution and high purity, has strong ultraviolet absorption capacity, has no characteristic absorption to visible light, has good permeability and has good effect of preventing ultraviolet.
The nanometer ferric oxide has the characteristics of nanometer particles, such as surface effect, small-size effect, quantum size effect and the like, and the currently applied more ferric oxide is mainly alpha-Fe 2 O 3 And nanometer alpha-Fe 2 O 3 Has excellent magnetism, higher catalytic activity, good light resistance, weather resistance and ultraviolet shielding capability.
In a specific embodiment, the coupling agent is one or more of a silane coupling agent, a titanate coupling agent, and an aluminum titanium composite coupling agent.
By adopting the technical scheme, the coupling agent is a multifunctional substance, one end of the coupling agent can react with chemical groups on the surface of an inorganic substance to form firm chemical bonding, and the other end of the coupling agent has the property of being organophilic and can react with organic molecules or physically wind, so that two materials with different properties are firmly combined. The combination of the inorganic nanometer ultraviolet inhibitor and the acrylic ester monomer and the fluorine-containing monomer is facilitated by adding the coupling agent.
In a specific embodiment, the antioxidant is one or more of antioxidant 1076, antioxidant 1098, antioxidant IR1010, antioxidant 168.
By adopting the technical scheme, the addition of the antioxidant can prevent the substances from losing the original beneficial attributes after the acrylate monomer and the fluorine-containing monomer react with oxygen. The antioxidant can capture active free radicals to generate inactive free radicals, so that chain locking reaction is stopped; or can decompose the polymer hydroperoxide produced during oxidation to form a stable, inactive product, thereby terminating the chain lock reaction. The antioxidant has the functions of delaying the oxidation process of the high polymer materials, ensuring that the high polymer materials can be processed smoothly and prolonging the service life of the high polymer materials.
In a specific embodiment, the preparation method of the ultraviolet-proof master batch comprises the following steps: stirring and mixing the modified nano ultraviolet-proof material, the coupling agent, the antioxidant and the ester substance, extruding and granulating.
By adopting the technical scheme, the ester substances are melted and blended with the modified nano ultraviolet-proof material under the action of the coupling agent and the antioxidant to form a uniform ultraviolet-proof polyester fiber mixture, and then the ultraviolet-proof master batch is formed by extrusion granulation, so that the prepared ultraviolet-proof master batch has uniform particle distribution, excellent ultraviolet-proof performance and good compatibility with polyester fibers.
In a specific embodiment, the modified nano ultraviolet protection material is subjected to a drying and dispersing treatment before being mixed, specifically: and (3) performing normal-pressure drying treatment on the modified nano ultraviolet-proof material, mixing the modified nano ultraviolet-proof material with the mass ratio of 10:1 with a surface dispersing agent, and performing dispersion treatment in a mechanical grinding mode.
By adopting the technical scheme, the water and other impurities adsorbed by the modified nano ultraviolet-proof material can be removed through the drying and dispersing treatment of the modified nano ultraviolet-proof material, so that the dispersing effect of the modified nano ultraviolet-proof material is better, and the obtained master batch has better spinning characteristics.
In a specific embodiment, the uv-blocking masterbatch further comprises a pre-crystallization treatment, in particular: and (3) placing the ultraviolet-proof master batch into a vacuum drying oven at 70-80 ℃ for 4-6h.
By adopting the technical scheme, the effect of the pre-crystallization treatment is to pre-crystallize the ultraviolet-proof master batch at the lower temperature and remove the water. If the uv-protective master batch is dried at a high temperature initially, the master batch may agglomerate together due to the water content and the high temperature, thereby affecting the subsequent use of the master batch.
In a second aspect, the application provides a method for preparing ultraviolet-proof yarns, which adopts the following technical scheme:
the preparation method of the ultraviolet-proof yarn comprises the following steps:
s1, mixing ultraviolet-proof master batches and polyester chips and melting to form spinning melt;
s2, spraying, cooling and solidifying the spinning melt to obtain fibers;
s3, obtaining the ultraviolet-proof yarn through roving, spinning and winding the fiber.
By adopting the technical scheme, the ultraviolet-proof master batch is added into the polyester chip for blending spinning, the prepared fiber can be purely spun or blended with other fibers to form yarn, the UPF value of the finished product is at least above 60, the damage of ultraviolet rays to human bodies can be effectively prevented, and the fiber also has the excellent performance of common polyester fiber products.
In a specific embodiment, in the step S2, the delay height of the spinneret plate used for cooling the spun yarn is set to 45-50mm, the side-blowing window height is set to 1200-1550mm, the side-blowing temperature is set to 22-27 ℃, the wind speed is controlled to 0.3-0.5m/S, and the relative humidity is controlled to 65-75%.
By adopting the technical scheme, after the spinning melt trickle is sprayed out of the spinneret plate, heat is released to surrounding medium immediately, so that the melt trickle is cooled and solidified to form fibers. The process of heat exchange between the melt stream and the air cooling medium directly affects the speed profile of the spinning stream, the uniformity of the fiber structure, the stabilization of the surface morphology, the stabilization of the solidification zone, etc. The selection of proper and stable cooling conditions has important significance for smooth proceeding in the fiber forming process and finally obtaining high-quality fibers. The wind speed, the wind temperature and the wind speed of the cross-blowing have great influence on the cooling forming process and the quality of the silk yarns, and too high and too low can cause the poor stretching performance of the fibers and the uniformity of the fiber structure, thereby influencing the quality of the fibers.
In summary, the present application includes at least one of the following beneficial technical effects:
1. according to the application, the nano ultraviolet inhibitor is modified by the acrylic ester monomer and the fluorine-containing monomer, so that the dispersion stability and compatibility of the nano ultraviolet inhibitor are improved, the functions of the ultraviolet inhibitor are fully exerted, and the ultraviolet resistance of the yarn is improved;
2. according to the application, the modified nano ultraviolet-proof material and the ester substance are mixed to form the ultraviolet-proof master batch, so that the ultraviolet-proof master batch has good spinning characteristics, and the spinning effect of the ultraviolet-proof yarn is improved;
3. according to the application, the ultraviolet-proof master batch is subjected to pre-crystallization treatment, so that moisture can be removed, agglomeration of the ultraviolet-proof master batch at high temperature is prevented, and the use effect is improved.
Detailed Description
The present application will be described in further detail with reference to examples and examples.
Preparation example
Preparation example 1
The preparation example discloses a preparation method of a modified nano ultraviolet-proof material, which comprises the following steps:
p1, weighing 20g of nano zinc oxide particles and 2g of gamma-methacryloxypropyl trimethoxy silane (KH-570) in 150ml of absolute ethyl alcohol, uniformly stirring, performing ultrasonic dispersion for 10min, heating in a water bath to 50 ℃ for reaction for 5h, drying at 80 ℃, and grinding to obtain modified nano zinc oxide particles; the nanometer ultraviolet inhibitor in the preparation example adopts nanometer zinc oxide, and one or more of nanometer titanium oxide, nanometer cerium oxide and nanometer ferric oxide can also be adopted in other preparation examples; the silane coupling agent is gamma-methacryloxypropyl trimethoxy silane (KH-570), which is not limited to the above;
p2, adding the 10g modified nano zinc oxide particles into a solution of 12g polymerizable emulsifier and 300ml water, stirring uniformly, performing ultrasonic dispersion for 10min, heating to 70 ℃ in a water bath, adding 0.5g initiator potassium persulfate aqueous solution, dropwise adding 50g methyl acrylate, 10g hexafluorobutyl acrylate and 0.5g initiator potassium persulfate aqueous solution, continuously reacting for 5h after dropwise adding, naturally cooling to room temperature, and filtering to obtain uniform and stable modified nano ultraviolet-proof material. In the preparation example, methyl acrylate is selected as the acrylic ester monomer, and the method is not limited to the methyl acrylate; the fluorine-containing monomer is hexafluorobutyl acrylate, which is not limited.
Preparation example 2
The preparation example discloses a preparation method of a modified nano ultraviolet-proof material, which comprises the following steps:
p1, weighing 10g of zinc oxide particles and 2g of gamma-methacryloxypropyl trimethoxy silane (KH-570) in 150ml of absolute ethyl alcohol, uniformly stirring, performing ultrasonic dispersion for 10min, heating in a water bath to 50 ℃ for reaction for 5h, drying at 80 ℃, and grinding to obtain modified nano zinc oxide particles;
p2, adding the 10g modified nano zinc oxide particles into a solution of 12g polymerizable emulsifier and 300ml water, stirring uniformly, performing ultrasonic dispersion for 10min, heating to 70 ℃ in a water bath, adding 0.5g initiator potassium persulfate aqueous solution, dropwise adding 30g methyl acrylate, 10g hexafluorobutyl acrylate and 0.5g initiator potassium persulfate aqueous solution, continuously reacting for 5h after dropwise adding, naturally cooling to room temperature, and filtering to obtain uniform and stable modified nano ultraviolet-proof material.
PREPARATION EXAMPLES 3 to 11
As shown in Table 1, the preparation examples 3 to 11 were mainly different in the ratio of the raw materials.
The following is an example of preparation example 3, which discloses an ultraviolet-proof master batch, and the specific formula is as follows: 20g of modified nano ultraviolet-proof material, 1g of silane coupling agent, 0.1g of antioxidant IR1010 and 70g of PTT; the modified nano ultraviolet-proof material is prepared by adopting the preparation example 1. The coupling agent is selected from silane coupling agent, particularly gamma-methacryloxypropyl trimethoxy silane (KH-570), and one or more of titanate coupling agent and aluminum-titanium composite coupling agent can be selected in other preparation examples; the antioxidant is IR1010, and one or more of antioxidant 1076, antioxidant 1098 and antioxidant 168 can be selected in other preparation examples; the PTT fiber prepared from PTT (polytrimethylene terephthalate) integrates the softness of nylon, the fluffiness of acrylic fibers and the dirt resistance of terylene, and the inherent elastic characteristic of the PTT fiber integrates the excellent wearability of various fibers, so the preparation example is preferably PTT, but is not limited to the PTT.
The preparation example also discloses a preparation method of the ultraviolet-proof master batch: the specific process is as follows: putting 20g of modified nano ultraviolet-proof material into a drying oven with the temperature of 80 ℃, drying for 8 hours, then adding 2g of polyacrylamide surface dispersing agent for mixing, and carrying out dispersion treatment in a mechanical grinding mode; and stirring and mixing the dispersed modified nano ultraviolet-proof material, a silane coupling agent, an antioxidant IR1010 and PTT according to a proportion, and granulating by a double-screw kneading extruder to form the ultraviolet-proof master batch.
Table 1 proportions of the raw materials in the ultraviolet-proof master batches of preparation examples 3 to 11
Preparation example 12
This preparation is substantially the same as preparation 10, except that the modified nano ultraviolet screening material was obtained in preparation 2.
Examples
Example 1
In this example, an ultraviolet-proof yarn is disclosed, which is made of 5g of ultraviolet-proof master batch and 95g of PTT chip, wherein the ultraviolet-proof master batch is obtained in preparation example 3, and the polyester chip in this example is preferably PTT chip, so that the polyester chip is preferably PTT chip for better compatibility with the ultraviolet-proof master batch, but not limited thereto.
The embodiment also discloses a preparation method of the ultraviolet-proof yarn, which comprises the following steps:
s1, placing ultraviolet-proof master batches into a drying oven at 70 ℃, and processing for 6 hours to perform pre-crystallization treatment; then, the ultraviolet-proof master batch and PTT slices after the pre-crystallization treatment are both put into a vacuum drying device and dried for 8 hours under the conditions that the vacuum degree is 100 and the temperature is 125 ℃;
s2, adding the dried ultraviolet-proof master batch and PTT slices into a double-screw extruder according to a proportion to carry out melt extrusion, wherein the melting temperature of each region of the screw is set at 240-260 ℃; after melting, feeding into a spinning box for spinning to obtain undrawn yarn; wherein the temperature of the spinning box body is controlled to be 256-266 ℃, the pressure is 10Mpa, and the winding speed is 4500m/min; the delay height of the spinneret plate is set to be 50mm, the side blowing window height is set to be 1200mm, the side blowing temperature is set to be 27 ℃, the wind speed is controlled to be 0.3m/s, and the relative humidity is controlled to be 75%. The method comprises the steps of carrying out a first treatment on the surface of the After balancing for 24 hours in a balancing room with the temperature of 22 ℃ and the humidity of 65%, carrying out post-spinning double-zone hot stretching technology to obtain the ultraviolet resistant fiber, wherein the temperature of a first stretching disk is 80 ℃, the temperature of a heater is controlled at 120 ℃, the stretching speed is 800m/min, the first stretching double speed is 1.005, and the second stretching double speed is 1.5;
s3, carrying out roving, spinning and spooling treatment on the ultraviolet-proof yarn to obtain wool blended yarn, wherein in the roving process, the total draft multiple is 7, the back zone draft multiple is 1, the roving ration is 4g/10m, and the roving twist is 100; the spinning process adopts a process of small back zone draft multiple and large back zone gauge, wherein the small back zone draft multiple is 1, and the large back zone gauge is 20mm multiplied by 26mm; in the winding process, in order to ensure the quality of the yarn strips and reduce the hairiness, the thickness knots and hairiness, the winding speed should be properly reduced; the winding speed was set at 400m/min, the winding tension was 20N, and the relative humidity was 75%.
Example 2
In this example, an ultraviolet-proof yarn is disclosed, which is made from 10g of ultraviolet-proof master batch and 90g of PTT cut pieces, wherein the ultraviolet-proof master batch is obtained by adopting preparation example 3.
The embodiment also discloses a preparation method of the ultraviolet-proof yarn, which comprises the following steps:
s1, placing ultraviolet-proof master batches into a drying oven at 80 ℃, and performing pretreatment for 4 hours to perform pre-crystallization treatment; then, the ultraviolet-proof master batch and PTT slices after the pre-crystallization treatment are both put into a vacuum drying device and dried for 8 hours under the conditions that the vacuum degree is 100 and the temperature is 125 ℃;
s2, adding the dried ultraviolet-proof master batch and PTT slices into a double-screw extruder according to a proportion to carry out melt extrusion, wherein the melting temperature of each region of the screw is set at 240-260 ℃; after melting, feeding into a spinning box for spinning to obtain undrawn yarn; wherein the temperature of the spinning box body is controlled to be 256-266 ℃, the pressure is 10Mpa, and the winding speed is 4500m/min; the delay height of the spinneret plate is set to be 45mm, the side blowing window height is set to be 1550mm, the side blowing temperature is set to be 22 ℃, the wind speed is controlled to be 0.5m/s, and the relative humidity is controlled to be 65%; after balancing for 24 hours in a balancing room with the temperature of 22 ℃ and the humidity of 65%, carrying out post-spinning double-zone hot stretching technology to obtain the ultraviolet resistant fiber, wherein the temperature of a first stretching disk is 80 ℃, the temperature of a heater is controlled at 200 ℃, the stretching speed is 1200m/min, the first stretching double speed is 1.005, and the second stretching double speed is 1.5;
s3, carrying out roving, spinning and spooling treatment on the ultraviolet-proof yarn to obtain wool blended yarn, wherein in the roving process, the total draft multiple is 7, the back zone draft multiple is 1, the roving ration is 4g/10m, and the roving twist is 100; the spinning process adopts a process of small back zone draft multiple and large back zone gauge, wherein the small back zone draft multiple is 1, and the large back zone gauge is 20mm multiplied by 26mm; in the winding process, in order to ensure the quality of the yarn strips and reduce the hairiness, the thickness knots and hairiness, the winding speed should be properly reduced; the winding speed was set at 400m/min, the winding tension was 20N, and the relative humidity was 75%.
Examples 3 to 11
This example differs from example 1 in that the ultraviolet-shielding master batch was prepared according to the following examples, and is shown in Table 2.
Table 2 preparation examples of ultraviolet-proof masterbatch used in examples 3 to 11
Comparative example
Comparative example 1
This comparative example differs from example 1 in that the modified nano uv-blocking material is replaced with an equivalent amount of nano uv-blocking agent.
Comparative example 2
This comparative example differs from example 1 in that the uv-blocking master batch was replaced with an equivalent amount of nano uv-blocking agent.
Performance detection
The ultraviolet-proof yarns obtained in examples 1 to 11 and the ultraviolet-proof yarns obtained in comparative examples 1 to 2 were processed into thin plain weave fabrics, and ultraviolet-proof tests were carried out according to the method prescribed in GB/T18830-2009 "determination of ultraviolet-proof Property of textiles", the test instrument was Labsphere, the washing method was referred to AATCC13, and the test results are shown in Table 3.
TABLE 3 Performance test data sheets for examples 1-11 and comparative examples 1-2
Referring to Table 3, in combination with examples 1-11 and comparative examples 1-2, it can be seen that the UV resistant yarns prepared according to the present application produce fabrics having UPF values greater than 60, T (UVA) AV Less than 3%; compared with the ultraviolet-proof yarn prepared by adding the ultraviolet-proof master batch formed by mixing the nanometer ultraviolet-proof agent and the ester substance in the polyester chip in the comparative example 1, the ultraviolet-proof yarn has better ultraviolet-proof performance; meanwhile, the ultraviolet-proof yarn prepared by adding the ultraviolet-proof agent into the polyester chip has better ultraviolet-proof performance compared with the comparative example 2. According to the application, the nano ultraviolet inhibitor is grafted and modified by the acrylic ester monomer and the fluorine-containing monomer, so that the nanoparticle composite microsphere which is uniformly dispersed in a disperse phase is generated, the dispersion stability of the nanoparticle is improved, and the nano is avoidedThe particle aqueous dispersion is easy to agglomerate and difficult to disperse during high-speed shearing dispersion and ultrasonic dispersion treatment, so that the nanometer effect of the nanometer ultraviolet inhibitor is fully exerted; the modified nano ultraviolet-proof powder contains fluorine monomer, so that the surface tension of the graft copolymer is reduced, the compatibility of the modified nano ultraviolet-proof powder with other components is improved, and interface defects are not easy to form; meanwhile, the ultraviolet-proof master batch formed by mixing the modified nanometer ultraviolet-proof powder and the ester substance has good spinning characteristic and dispersion stability, so that the compatibility of the ultraviolet-proof master batch with polyester chips is improved, the ultraviolet-proof performance of the yarn is improved, and the spinning effect is also improved.
The present embodiment is only for explanation of the present application and is not to be construed as limiting the present application, and modifications to the present embodiment, which may not creatively contribute to the present application as required by those skilled in the art after reading the present specification, are all protected by patent laws within the scope of claims of the present application.
Claims (10)
1. An ultraviolet-proof yarn, characterized in that: the composite material is prepared from the following raw materials in parts by weight: 5-10 parts of ultraviolet-proof master batch and 90-95 parts of polyester chip; the ultraviolet-proof master batch is prepared from the following raw materials in parts by mass: 20-30 parts of modified nano ultraviolet-proof material, 1-3 parts of coupling agent, 0.1-0.3 part of antioxidant and 70-80 parts of ester substance; the modified nanometer ultraviolet-proof material is obtained by modifying nanometer ultraviolet-proof agent by acrylate monomer and fluorine-containing monomer.
2. The uv resistant yarn of claim 1, wherein: the preparation method of the modified nano ultraviolet-proof material comprises the following steps:
dissolving the nano ultraviolet-proof agent and the silane coupling agent with the mass ratio of (5-10) being 1 in absolute ethyl alcohol, uniformly stirring, heating for reaction, drying and grinding to obtain modified nano ultraviolet-proof particles;
adding the modified nano ultraviolet-proof particles into a polymeric emulsifier aqueous solution, uniformly stirring, adding an initiator, an acrylic ester monomer and a fluorine-containing monomer for reaction, and filtering to obtain the ultraviolet-proof nano ultraviolet-proof emulsion; the mass ratio of the modified nanometer ultraviolet-proof particles to the acrylic ester monomer to the fluorine-containing monomer is 1 (3-5): 1.
3. the uv resistant yarn of claim 2, wherein: the nanometer ultraviolet inhibitor is one or more of nanometer zinc oxide, nanometer titanium oxide, nanometer cerium oxide and nanometer ferric oxide.
4. The uv resistant yarn of claim 1, wherein: the coupling agent is one or more of silane coupling agent, titanate coupling agent and aluminum-titanium composite coupling agent.
5. The uv resistant yarn of claim 1, wherein: the antioxidant is one or more of antioxidant 1076, antioxidant 1098, antioxidant IR1010 and antioxidant 168.
6. The uv resistant yarn of claim 1, wherein: the preparation method of the ultraviolet-proof master batch comprises the following steps: stirring and mixing the modified nano ultraviolet-proof material, the coupling agent, the antioxidant and the ester substance, extruding and granulating.
7. The uv resistant yarn of claim 6, wherein: the modified nano ultraviolet-proof material is subjected to drying and dispersing treatment before mixing, and specifically comprises the following steps: and (3) performing normal-pressure drying treatment on the modified nano ultraviolet-proof material, mixing the modified nano ultraviolet-proof material with the mass ratio of 10:1 with a surface dispersing agent, and performing dispersion treatment in a mechanical grinding mode.
8. The uv resistant yarn of claim 6, wherein: the ultraviolet-proof master batch also comprises a pre-crystallization treatment, specifically: and (3) placing the ultraviolet-proof master batch into a vacuum drying oven at 70-80 ℃ for 4-6h.
9. A process for the preparation of an anti-uv yarn according to claims 1-8, characterized in that: the method comprises the following steps:
s1, mixing ultraviolet-proof master batches and polyester chips and melting to form spinning melt;
s2, spraying, cooling and solidifying the spinning melt to obtain fibers;
s3, obtaining the ultraviolet-proof yarn through roving, spinning and winding the fiber.
10. The method of making an ultraviolet resistant yarn as set forth in claim 9, wherein: in the step S2, the delay height of a spinneret plate adopted during spinning cooling is set to be 45-50mm, the side blowing window height is set to be 1200-1550mm, the side blowing temperature is set to be 22-27 ℃, the wind speed is controlled to be 0.3-0.5m/S, and the relative humidity is controlled to be 65-75%.
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