Highly elastic moisture-conductive polyester core-spun yarn, preparation method thereof, and moisture-absorbing quick-drying fabric

Abstract

The present invention discloses a highly elastic moisture-conductive polyester core-spun yarn, comprising a moisture-conductive core yarn and a modified polyester staple fiber, wherein the moisture-conductive core yarn is a fiber filament with a special-shaped cross-section, and the surface of the fiber filament is attached with a sericin coating; the modified polyester staple fiber is coated on the surface of the moisture-conductive core yarn. The present invention also discloses a preparation method of the highly elastic moisture-conductive polyester core-spun yarn and a moisture-absorbing and quick-drying fabric prepared therefrom. The polyester core-spun yarn disclosed by the present invention not only has the advantage of high elasticity, but also has good air permeability and moisture permeability, and excellent wearing comfort; at the same time, the outer sheath in the core-spun yarn has a good coating effect on the core yarn, overcoming the problem that the traditional core-spun yarn is easy to "dew".

Description

Technical Field

[0001] The invention relates to the technical field of textile fabrics, and in particular to a high-elastic moisture-conductive polyester core-spun yarn, a preparation method thereof, and a moisture-absorbing quick-drying fabric. Background Art

[0002] Polyester is the trade name of polyester fiber, which is an important variety of synthetic fiber. Polyester is made of terephthalic acid (PTA) / dimethyl terephthalate (DMT) and ethylene glycol (MEG) as raw materials, and the fiber-forming polymer - polyethylene terephthalate (PET) is prepared through esterification / ester exchange and polycondensation reaction, and then the fiber is made through spinning and post-processing. Compared with other synthetic fibers, polyester fiber has a series of advantages, such as high strength, good elasticity, good wrinkle resistance and shape retention; it also has good wear resistance, heat resistance and resistance to various chemicals. It is strong and durable, so it is widely loved by consumers and is widely used in making various types of clothing.

[0003] With the continuous development of textile technology and the improvement of people's living needs, consumers pay more and more attention to the comfort and functionality of clothing. Polyester fabrics have low moisture regain and poor moisture absorption and air permeability. They feel stuffy and prone to static electricity after wearing, and have poor wearing comfort. Therefore, it is necessary to improve the performance of polyester materials to meet the needs of consumers.

[0004] A Chinese patent application with publication number CN115467070A (publication date December 13, 2022) discloses a moisture-absorbing and quick-drying polyester fabric, which is a blend of porous polyester fibers, bamboo charcoal modified fibers and silk. The special porous polyester fibers and bamboo charcoal modified fiber structures can give the fabric excellent moisture-absorbing and quick-drying properties.

[0005] Publication number CN115162003A (publication date October 11, 2022) discloses a highly hygroscopic polyester fabric. Acrylic acid, styrene and potassium persulfate are mixed to obtain polyacrylic acid-styrene copolymer, which is then mixed with sodium alginate paste, synthetic acrylic thickener, acrylic acid-polyurethane adhesive, acrylamide anti-migration agent, and sodium methylenebismethylnaphthalene sulfonate to obtain printing paste. The printing paste of hygroscopic resin is applied to polyester fabric through a printing process, thereby giving the polyester fabric excellent high hygroscopicity.

[0006] Although the above-mentioned moisture-absorbing and quick-drying polyester fabrics have good water absorption, they all have problems such as complex production process, low production efficiency, and the product is not easy to dry after absorbing water. Summary of the invention

[0007] The purpose of the present invention is to provide a high-elasticity, moisture-absorbing and quick-drying polyester core-spun yarn and a preparation method thereof. The polyester core-spun yarn has a simple preparation process and not only has the advantages of high elasticity, but also has good air permeability and moisture permeability, and is excellent in wearing comfort. At the same time, the outer covering yarn in the core-spun yarn has a good covering effect on the core yarn, thus overcoming the problem that traditional core-spun yarn is prone to "dew".

[0008] In a first aspect, the present invention provides a highly elastic moisture-conductive polyester core-spun yarn, comprising:

[0009] A moisture-conducting core yarn, wherein the moisture-conducting core yarn is a fiber filament with a special-shaped cross-section, and a sericin coating is attached to the surface of the fiber filament; and

[0010] The modified polyester staple fiber is coated on the surface of the moisture conducting core yarn.

[0011] Furthermore, the special-shaped cross section includes at least one of a straight line shape, a triangle shape, a cross shape, a cross shape, and a wave shape.

[0012] Furthermore, the fiber filaments include at least one of polyester fiber filaments and spandex fiber filaments.

[0013] Furthermore, the fineness of the fiber filament is 30D~150D.

[0014] Furthermore, the modified polyester staple fiber includes at least one of polyester-cotton blended yarn, polyester-linen blended yarn, polyester-ramie blended yarn, and polyester-regenerated cellulose blended yarn.

[0015] Furthermore, in the modified polyester staple fiber, the blending ratio of polyester is between 30% and 60%.

[0016] Furthermore, in the sericin coating, the molecular weight of sericin is above 5000 Da.

[0017] Furthermore, the sericin coating also includes at least one of the following ingredients: an antibacterial agent, a deodorant, and a fragrance.

[0018] In a second aspect, the present invention provides a method for preparing a highly elastic and moisture-conductive polyester core-spun yarn, comprising the following steps:

[0019] Passing fiber filaments with a special-shaped cross section through a sericin solution so that the sericin solution adheres to the surface of the fiber filaments, and drying at a first temperature to obtain a sericin coating;

[0020] The fiber filament is used as the core yarn and the modified polyester staple fiber is used as the outer covering yarn to obtain the core-spun yarn after spinning;

[0021] The core-spun yarn is heat-treated at a second temperature to obtain the high-elastic moisture-conductive polyester core-spun yarn.

[0022] Furthermore, the concentration of the sericin solution is 1wt%~3wt%.

[0023] Furthermore, the sericin solution also contains 0.001 wt% to 0.1 wt% of functional ingredients, and the functional ingredients include at least one of the following ingredients: bactericide, deodorant, and fragrance.

[0024] Furthermore, before spinning the core-spun yarn, the modified polyester staple fiber is subjected to activation treatment, wherein the activation treatment includes oxygen plasma treatment and / or oxidant treatment.

[0025] Further, the oxidant includes KIO 4 , K 2 S 2 O 8 、NaClO、NaBO 3 ·4H 2 At least one of O.

[0026] Furthermore, the first temperature is not higher than 45°C.

[0027] Furthermore, the second temperature is 60-90° C., and the heat treatment time is 10-30 min.

[0028] In a third aspect, the present invention provides a moisture-absorbing and quick-drying fabric woven from yarns, wherein the yarns at least include the aforementioned high-elasticity and moisture-conductive polyester core-spun yarn.

[0029] The present invention can at least achieve the following technical effects:

[0030] 1. The high-elasticity and moisture-conductive polyester core-spun yarn provided by the present invention uses polyester filaments or spandex filaments with high strength and high elasticity as the core yarn, and modified polyester staple yarns as the outer covering yarn, so that the obtained core-spun yarn not only maintains high strength and high elasticity, but also has excellent air permeability and moisture absorption, thereby improving wearing comfort; at the same time, it has good wear resistance, stable size, small shrinkage, and is crisp, not easy to wrinkle, easy to wash, and quick-drying.

[0031] 2. The high-elastic moisture-conductive polyester core-spun yarn provided by the present invention comprises a core yarn of fiber filaments with a special-shaped cross-section and a groove structure on the surface. The presence of these grooves forms a strong capillary effect, which can quickly absorb moisture and conduct it to the surface of the fabric, thereby promoting the diffusion and volatilization of moisture and improving the moisture absorption and moisture conduction properties of the fiber.

[0032] 3. The highly elastic and moisture-conductive polyester core-spun yarn provided by the present invention has a layer of highly hydrophilic sericin coating attached to the surface of the hydrophobic core yarn, thereby improving the defect of poor water absorption of the polyester / spandex core yarn and improving the hydrophilicity of the core yarn; utilizing the wettability gradient difference formed between the outer yarn and the core yarn, the moisture absorbed by the outer yarn can be effectively conducted to the surface of the core yarn and discharged from the groove channel on the surface of the core yarn, thereby further improving the moisture absorption and moisture conduction effect of the fiber.

[0033] 4. The highly elastic and moisture-conductive polyester core-spun yarn provided by the present invention has the modified polyester staple fibers after activation coated on the surface of the core yarn, and after heat treatment, the modified polyester staple fibers form physical bonding and chemical bonding with the sericin coating on the surface of the core yarn, so that the core yarn is firmly coated on the surface of the core yarn; when the yarn is tensioned or retracted, the coated yarn on the surface of the core yarn will not shift, thereby avoiding the problem of easy "dew" of the traditional core-spun yarn, and it is not easy to have spots, defects and other undesirable phenomena in the subsequent dyeing process. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 Photos of water contact angles of plain fabrics made of polyester filaments without sericin coating modification (a) and plain fabrics made of polyester filaments modified with sericin coating (b). DETAILED DESCRIPTION

[0035] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings and specific implementation methods. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0036] Polyester fiber is a widely used synthetic fiber. It has high strength, good elasticity, good wrinkle resistance and shape retention, and has good abrasion resistance, heat resistance and resistance to various chemicals. It is strong and durable. However, it has poor air permeability and moisture conduction performance, and poor comfort when worn close to the body. Therefore, it is necessary to improve the performance of polyester materials to meet the needs of consumers.

[0037] In response to the above technical problems, the present invention provides a highly elastic moisture-conductive polyester core-spun yarn, comprising a moisture-conductive core yarn and modified polyester staple fibers, wherein the moisture-conductive core yarn is a fiber filament with a special cross-section, and a sericin coating is attached to the surface of the fiber filament; the modified polyester staple fibers are coated on the surface of the moisture-conductive core yarn.

[0038] Core-spun yarn is a composite yarn formed by combining core yarn and outer fiber, generally with filament as core yarn and staple fiber as outer fiber. Compared with fiber monofilament, core-spun yarn can play their respective advantages and make up for the shortcomings of both. In the present invention, the moisture-conducting core yarn can be selected as a synthetic fiber with high strength and high elasticity, including but not limited to polyester fiber, spandex fiber, PTT fiber, PBT fiber, etc., preferably polyester fiber or spandex fiber, so as to ensure that the core-spun yarn has the characteristics of high strength, good elasticity, good stability, wear resistance, acid and alkali resistance, etc.

[0039] In the present invention, the moisture-conducting core yarn is a fiber filament with a special-shaped cross section, wherein the "special-shaped cross section" refers to a non-circular cross section, including but not limited to at least one of a straight line, a triangle, a cross, a mitre, and a wavy shape, preferably a cross, a mitre, or a wavy shape. When the fiber with such a special-shaped cross section is made into a core-spun yarn, a tiny groove structure is formed on its surface. The presence of these micro grooves forms a strong capillary effect, which can quickly absorb moisture and conduct it to the fabric surface, thereby promoting the diffusion and volatilization of moisture, thereby improving the moisture absorption and moisture conduction properties of the fiber.

[0040] In the present invention, there is no limit to the fineness of the moisture-conducting core yarn. Considering the strength, elasticity, abrasion resistance, feel and other indicators of the fiber, it is preferably 30D~150D, for example, it can be 30D, 50D, 60D, 80D, 100D, 120D, 140D, 150D or any value therein.

[0041] For chemical synthetic fibers such as polyester and spandex, there are a large number of hydrophobic groups such as ester groups on their surfaces, which leads to poor moisture absorption performance. In the present invention, a sericin coating is attached to the surface of the moisture-conducting core yarn. The sericin has a large number of hydrophilic amino, hydroxyl and other active groups, which can improve the wettability of the surface of polyester fiber and spandex fiber, thereby improving the moisture absorption and water conduction performance of the moisture-conducting core yarn. In addition, a wetting gradient difference can be formed between the core yarn and the outer yarn, thereby further promoting the moisture absorption and moisture conduction performance of the fiber.

[0042] In the present invention, in the sericin coating, the molecular weight of sericin is preferably above 5000Da, more preferably between 5000Da and 10000Da. If the molecular weight is lower than 5000Da, the sericin is highly water-soluble and is not easy to form a film on the fiber surface, and even if the film is formed, the strength is low.

[0043] Sericin can be purchased or extracted from silk cocoons, silk and other products. The extraction method can refer to the existing extraction process. For example, the silk cocoons, silk and other products can be chopped up and degummed in a high-temperature water bath or alkaline bath; then, the degummed silk products are cleaned and dissolved in lithium bromide (LiBr) solution, and the obtained solution is further dialyzed and centrifuged to remove impurities to obtain a sericin solution.

[0044] In some embodiments, the sericin coating may further include functional ingredients, so that the fiber has corresponding functions, and the functional ingredients include but are not limited to at least one of the following ingredients: antibacterial agent, deodorant, fragrance. These functional ingredients are evenly embedded in the sericin coating, and the sericin coating has good stability and will not be destroyed during the subsequent fabric finishing and washing process. Therefore, the presence of the sericin coating ensures the antibacterial and deodorizing effects of the fiber and the long-term fragrance.

[0045] In the present invention, the antibacterial agent can be various ingredients with antibacterial efficacy, such as copper ions, copper nanoparticles, silver ions, quaternary ammonium salts, aluminum silicate, etc.; the deodorant can be commonly used organic or inorganic deodorizing ingredients, such as zirconium phosphate, polyethyleneimine, etc.; the fragrance can be various aromatic ingredients, preferably aromatic essential oils, such as rosemary essential oil, tea seed essential oil, clove essential oil, rose essential oil; further, the fragrance is embedded in the microcapsule, so as to protect the aromatic essential oil from being decomposed by high temperature and improve the stability of the essential oil; at the same time, the microcapsule improves the sustained-release effect of the essential oil, so that the fragrance is long-lasting and stable.

[0046] In the present invention, the modified polyester staple fiber is wrapped around the surface of the moisture-conducting core yarn to form an outer fiber layer. The modified polyester staple fiber is a blended fiber of polyester and other natural fibers, including but not limited to at least one of polyester-cotton blended yarn, polyester-flax blended yarn, polyester-ramie blended yarn, and polyester-regenerated cellulose blended yarn.

[0047] In the modified polyester staple fiber of the present invention, the blending ratio of polyester is between 30% and 60%, for example, it can be 30%, 35%, 40%, 45%, 50%, 55%, 60% or any value therein. Within this blending ratio range, the fiber not only maintains the excellent strength and elasticity of polyester, but also has excellent air permeability and moisture absorption, thereby improving the comfort of wearing; at the same time, it has good wear resistance, stable size, small shrinkage, and has the characteristics of being crisp, not easy to wrinkle, easy to wash, and quick drying.

[0048] Furthermore, the present invention also provides a method for preparing the above-mentioned high-elastic moisture-conductive polyester core-spun yarn, comprising the following steps:

[0049] S1. Passing a fiber filament having a special-shaped cross section through a sericin solution so that the sericin solution adheres to the surface of the fiber filament (ie, sizing treatment), and drying at a first temperature to obtain a sericin coating;

[0050] S2. The fiber filament is used as the core yarn, and the modified polyester staple fiber is used as the outer covering yarn to obtain the core-spun yarn after spinning;

[0051] S3. heat-treating the core-spun yarn at a second temperature to obtain the highly elastic and moisture-conductive polyester core-spun yarn.

[0052] In the present invention, the concentration of the sericin solution is preferably 1wt% to 3wt%, for example, 1wt%, 1.5wt%, 2wt%, 2.5wt%, 3wt% or any value therein. Within this concentration range, the sericin solution has a suitable viscosity, which is conducive to the sericin solution adhering to the fiber surface and forming a coating of a certain thickness.

[0053] In some embodiments, when preparing the sericin solution, one or more functional ingredients may be added, such as antibacterial agents, deodorants, fragrances, etc. The amount of the functional ingredients added may be 0.001 wt% to 0.1 wt%, for example, 0.001 wt%, 0.005 wt%, 0.01 wt%, 0.02 wt%, 0.05 wt%, 0.08 wt%, 0.1 wt% or any value therein.

[0054] When the core yarn is sizing, when the functional components include microcapsules or other insoluble particles, the sericin solution can be kept in a state of continuous stirring by magnetic stirring, a blender or other means to avoid sedimentation of the microcapsules or other insoluble particles in the sericin solution.

[0055] In some embodiments, when the core yarn is subjected to sizing treatment, the yarn bobbin can be placed on a pay-off frame, and its free end can be wound on a take-up frame. A slurry pool is provided between the pay-off frame and the take-up frame, wherein a sericin solution is contained. In the process of paying off the core yarn, the middle part of the core yarn is placed below the liquid surface, so that when the core yarn passes under the liquid surface, the sericin solution continuously adheres to the surface of the fiber. Preferably, by controlling the pay-off speed, the time that the core yarn is under the liquid surface is greater than 10 seconds, more preferably greater than 30 seconds. Sufficient contact time can ensure that the sericin solution can fully wet the core yarn, and then can fully and evenly cover the surface of the core yarn to form a complete and uniform coating.

[0056] Furthermore, after the sizing treatment, the core yarn with the sericin solution attached is preliminarily dried at a first temperature to remove the solvent and form a coating film. The first temperature should not be too high, generally not higher than 45°C, for example, it can be 25°C, 30°C, 35°C, 40°C, 45°C or any value therein. Preferably, the drying can be carried out at room temperature. In order to increase the drying speed, auxiliary drying can be performed by blowing. For example, a hair dryer can be arranged between the take-up frame and the slurry pool to directly perform airflow-assisted drying on the core yarn.

[0057] In other embodiments, a take-up frame may not be provided, and the dried core yarn is directly fed by the front roller of the spinning frame after being drafted, so as to be twisted into yarn.

[0058] Next, the core-spun yarn is spun. In some embodiments, the spinning is performed by a spinning frame, and the specific spinning method is as follows: the core yarn with sericin coating is drafted and then fed into the front roller by a guide wheel; the modified polyester staple fiber is drafted and then fed into the back roller, and the two are twisted together into yarn, thereby obtaining the core-spun yarn.

[0059] In some embodiments, before spinning the core-spun yarn, the modified polyester staple fiber is preferably subjected to an activation treatment. The purpose of the activation treatment is to introduce polar groups or reactive groups on the surface of the modified polyester fiber, thereby promoting the bonding performance between the modified polyester fiber and the sericin coating. The activation treatment includes but is not limited to oxygen plasma treatment, oxidant treatment, and the like.

[0060] Oxygen plasma treatment has high energy, which can chemically change or break and dissociate the carbon-carbon bonds, carbon-hydrogen bonds, carbon-oxygen bonds and other chemical bonds on the surface of modified polyester staple fibers, thereby introducing free radicals or polar groups (-OH, -CHO, -COOH, etc.). Oxidant treatment can oxidize the natural cellulose components in modified polyester fibers, thereby converting the hydroxyl groups in cellulose into more reactive groups such as aldehyde groups and carboxyl groups. Therefore, the activation treatment changes the surface energy state of the modified polyester fibers, making them highly reactive.

[0061] Since sericin contains a large number of active groups such as hydroxyl and amino groups, when the modified polyester staple fiber in a high surface energy state contacts and is wrapped on the sericin coating with a certain preload, chemical bonding (including hydrogen bonding and covalent bonding) can occur between the modified polyester staple fiber and the active groups in the sericin coating, thereby firmly bonding the core yarn and the outer yarn together to avoid the phenomenon of outer yarn displacement. In addition, the sericin coating is in a slightly sticky state under heating conditions, which further promotes the bonding strength between the core yarn and the outer yarn through physical bonding.

[0062] In the present invention, when oxygen plasma is used for activation treatment, the power of the oxygen plasma can be 10-50 W, such as 10 W, 20 W, 30 W, 40 W, 50 W or any value therein. The treatment time can be 60-120 s, such as 60 s, 70 s, 80 s, 90 s, 100 s, 110 s, 120 s or any value therein.

[0063] In the present invention, when an oxidant is used for activation treatment, the oxidant may be a commonly used oxidant capable of oxidizing cellulose, including but not limited to KIO 4 , K 2 S 2 O 8 、NaClO、NaBO 3 ·4H 2 At least one of O. The specific oxidation process is an existing process and will not be described in detail in the present invention.

[0064] Furthermore, it is necessary to heat-treat the core-spun yarn obtained by spinning. In the present invention, heat-treating the core-spun yarn has multiple purposes. On the one hand, the purpose is to make the sericin coating undergo a secondary structure transformation, from an unstable and water-soluble spiral and non-β-folding structure to a stable and water-insoluble β-folding structure, and at the same time, the sericin forms a strong physical force with the surface of the core yarn and firmly and stably adheres to the surface of the core yarn, which is durable and effective in washing. In the subsequent fabric finishing and long-term washing process, the sericin coating will not dissolve, degrade, fall off, or be damaged, and has good stability; on the other hand, the purpose is: heat treatment can also improve the surface activity of the sericin coating and the modified polyester fiber, and promote the bonding between the modified polyester fiber and the core yarn. In addition, heat treatment can also play a role in preliminary shaping, stabilize the twist of the yarn, and prevent defects from occurring due to curling of the yarn.

[0065] Furthermore, the high-elastic moisture-conductive polyester core-spun yarn of the present invention can be woven alone or together with other types of yarns to obtain a fabric with moisture-absorbing and quick-drying functions.

[0066] In the following embodiments and comparative examples, various raw materials, equipment, etc. can be obtained by purchase unless otherwise specified. Example 1

[0067] This embodiment provides a highly elastic moisture-conductive core-spun yarn, wherein the core yarn is 100% polyester fiber filament (75D) with a cross-shaped cross-section, and the surface of the core yarn has a sericin coating; the covering yarn is a polyester-cotton blended yarn with a blending ratio of 50:50.

[0068] The preparation method of the high-elastic moisture-conductive core-spun yarn of this embodiment is as follows:

[0069] S1. Dissolve the lyophilized sericin powder in deionized water and stir until completely dissolved to obtain a sericin solution having a mass concentration of 2%;

[0070] S2. Place the polyester fiber cheese yarn with a cross-shaped cross section on the pay-off stand, and the other end of the yarn enters the drafting device for drafting. A slurry pool is set between the pay-off stand and the drafting device. The slurry pool is filled with the sericin solution prepared in step S1. When the yarn passes over the slurry pool, the middle of the yarn is below the liquid level of the slurry pool. A plurality of hair dryers are also set between the slurry pool and the drafting device to perform airflow-assisted drying on the yarn. The pay-off stand is controlled to pay off the yarn at a certain speed, so that when the yarn passes over the slurry pool, the time it is below the liquid level is greater than 20 seconds, and the drying time is greater than 60 seconds.

[0071] S3. Polyester-cotton blended yarn (blending ratio 50:50) was treated with oxygen plasma. The power of oxygen plasma was 30W and the treatment time was 90s.

[0072] S4. The fiber treated in step S2 is used as the core yarn, and the polyester-cotton blended yarn treated in step S3 is used as the outer covering yarn. The core yarn is fed from the front roller of the spinning frame, and the polyester-cotton blended yarn is fed from the rear roller. The two are twisted together to form yarn, thereby obtaining the core-spun yarn.

[0073] S5. The core-spun yarn spun in step S4 is heat-treated at 80° C. for 30 min to obtain a highly elastic and moisture-conductive core-spun yarn. Example 2

[0074] The only difference between this embodiment and embodiment 1 is that the core yarn is 100% polyester fiber filament (75D) with a wavy cross section. Example 3

[0075] The only difference between this embodiment and embodiment 1 is that the core yarn is 100% spandex fiber filament (75D) with a cross-shaped cross section. Example 4

[0076] The only difference between this embodiment and embodiment 1 is that the covered yarn is a blended yarn of polyester and regenerated cellulose, and the blending ratio is 50:50. Example 5

[0077] The difference between this embodiment and embodiment 1 is that in the process of preparing the core-spun yarn, the mass concentration of the sericin solution used is 1%. Example 6

[0078] The difference between this embodiment and embodiment 1 is that in the process of preparing the core-spun yarn, the mass concentration of the sericin solution used is 3%. Example 7

[0079] The difference between this embodiment and embodiment 1 is that in the process of preparing the core-spun yarn, 0.05 wt % of antibacterial copper nanoparticles are added to the sericin solution used. Example 8

[0080] The difference between this embodiment and embodiment 1 is that in the process of preparing the core-spun yarn, 0.1 wt % of deodorant polyethyleneimine is added to the sericin solution used. Example 9

[0081] The difference between this embodiment and embodiment 1 is that in the process of preparing the core-spun yarn, 0.1 wt % of clove essential oil microcapsules as a fragrance are added to the sericin solution used. Example 10

[0082] The difference between this embodiment and embodiment 1 is that before spinning the core-spun yarn, the polyester-cotton blended yarn is not treated with oxygen plasma, but with an oxidant; the oxidant used is K at a concentration of 2.0 g / L. 2 S 2 O 8 The solution was treated at 30°C for 30 minutes. After the treatment, the polyester-cotton blended yarn was taken out, washed with clean water for several times, and then dried for later use. Comparative Example 1

[0083] This comparative example provides non-core-spun yarn, i.e., 100% polyester fiber filament (75D) with a cross-shaped cross section. Comparative Example 2

[0084] The only difference between this comparative example and Example 1 is that there is no sericin coating on the surface of the core yarn. Comparative Example 3

[0085] The only difference between this comparative example and Example 1 is that no heat treatment is performed after the core-spun yarn is spun.

[0086] Performance Testing

[0087] 1. Contact angle test

[0088] 100% polyester fiber filaments with sericin coating on the surface and 100% polyester fiber filaments without sericin coating on the surface are woven into plain fabrics, and the fabric weight is 120g / m 2 The warp density is 400 strands / 10cm, and the weft density is 240 strands / 10cm. The water contact angle of the fabric is tested according to the method specified in DB44 / T 1872-2016. The results are as follows: Figure 1 shown.

[0089] from Figure 1It can be seen that the plain fabric (a) made of polyester filaments without sericin coating modification is obviously hydrophobic, with a water contact angle of about 130°; while the plain fabric (b) modified by sericin coating has a water contact angle reduced to about 80°, showing hydrophilicity. This shows that the hydrophilic sericin coating can significantly improve the hydrophobicity of polyester fibers, which is beneficial to improving the moisture absorption and moisture conduction properties of polyester fibers.

[0090] 2. Moisture absorption and quick drying performance test

[0091] The fibers of Examples 1 to 10 and Comparative Examples 1 to 3 were woven into plain fabrics, with a fabric weight of 120 g / m 2 Then, the moisture absorption and quick-drying properties of each fabric were measured according to "GB / T 21655.1-2008 Evaluation of moisture absorption and quick-drying properties of textiles Part 1: Single combination test method" and "GB / T5453-1997 Determination of air permeability of textile fabrics". The results are shown in Table 1.

[0092] Table 1

[0093]

[0094] Please refer to Table 1. The plain fabrics woven from the core-spun yarns of Examples 1 to 10 are superior to those of Comparative Examples 1 to 2 in terms of wicking height, drip diffusion time, air permeability and other indicators. This is because the moisture absorption and quick-drying properties of the fabrics are effectively improved by modifying the core yarns with sericin coating.

[0095] 3. Washing resistance

[0096] The fibers of Example 1, Comparative Example 2 and Comparative Example 3 were woven into plain fabrics, and the weight of the fabrics was 120 g / m 2 After washing the fabrics woven in Example 1, Comparative Example 2 and Comparative Example 3 for 20 times, the moisture absorption and quick-drying properties of the fabrics before and after washing were measured, and the results are shown in Table 2. Among them, clean water was used for washing, and the time for each washing was not less than 5 minutes, and each washing was dried before the next washing.

[0097] Table 2

[0098]

[0099] Please refer to Table 2. After washing 20 times, the plain fabric woven from the core-spun yarn of Example 1 has only a slight change in the wicking height, drip diffusion time and air permeability. However, after washing 20 times, the plain fabric woven from the core-spun yarn of Comparative Example 3 has almost the same wicking height and drip diffusion time as Comparative Example 2. The reason is that the core-spun yarn of Comparative Example 3 is not heat-treated after weaving, resulting in the sericin coating not undergoing a secondary structure transformation, so that the coating has a weak bonding force with the core yarn, is easily dissolved, and is not resistant to washing, which significantly reduces the moisture absorption and quick-drying performance of the fabric.

[0100] In summary, although the present invention has been disclosed as above in terms of preferred embodiments, the above preferred embodiments are not intended to limit the present invention. A person skilled in the art may make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be based on the scope defined in the claims.

Claims

1. A method for preparing a highly elastic and moisture-conductive polyester core-spun yarn, characterized in that: The following steps are involved: Passing fiber filaments with a special-shaped cross section through a sericin solution so that the sericin solution adheres to the surface of the fiber filaments, and drying at a first temperature to obtain a sericin coating; Activating the modified polyester staple fiber; The fiber filament is used as the core yarn, and the modified polyester staple fiber after activation treatment is used as the outer covering yarn, and the core-spun yarn is obtained after spinning; heat-treating the core-spun yarn at a second temperature to obtain the highly elastic and moisture-conductive polyester core-spun yarn; Wherein, in the sericin coating, the molecular weight of sericin is 5000-10000Da; The first temperature is not higher than 45°C; the second temperature is 60-90°C, and the heat treatment time is 10-30 minutes; The activation treatment includes oxygen plasma treatment and / or oxidant treatment; the oxidant includes at least one of KIO4, K2S2O8, NaClO, and NaBO3·4H2O; the power of the oxygen plasma is 10~50W, and the treatment time is 60~120s.

2. The method for preparing a highly elastic moisture-conductive polyester core-spun yarn according to claim 1, characterized in that: The concentration of the sericin solution is 1wt% to 3wt%; and / or, The sericin solution further contains 0.001 wt% to 0.1 wt% of functional ingredients, and the functional ingredients include at least one of the following ingredients: bactericide, deodorant, and fragrance.

3. The method for preparing a highly elastic moisture-conductive polyester core-spun yarn according to claim 2, characterized in that: The bactericide includes one of copper ions, copper nanoparticles, silver ions, quaternary ammonium salts, and aluminum silicate; the deodorant includes one of zirconium phosphate and polyethyleneimine; the fragrance includes one of rosemary essential oil, tea seed essential oil, clove essential oil, and rose essential oil; and / or, The fragrance is embedded in microcapsules.

4. A highly elastic moisture-conductive polyester core-spun yarn prepared according to the method according to any one of claims 1 to 3, characterized in that: The highly elastic moisture-conductive polyester core-spun yarn comprises: A moisture-conducting core yarn, wherein the moisture-conducting core yarn is a fiber filament with a special-shaped cross-section, and a sericin coating is attached to the surface of the fiber filament; and The modified polyester staple fiber is coated on the surface of the moisture conducting core yarn.

5. The highly elastic moisture-conductive polyester core-spun yarn according to claim 4, characterized in that: The special-shaped cross section includes at least one of a straight line shape, a triangle shape, a cross shape, a crisscross shape, and a wave shape.

6. The highly elastic moisture-conductive polyester core-spun yarn according to claim 4, characterized in that: The fiber filaments include at least one of polyester fiber filaments and spandex fiber filaments; and / or, The fineness of the fiber filament is 30D~150D.

7. The highly elastic moisture-conductive polyester core-spun yarn according to claim 4, characterized in that: The modified polyester staple fiber includes at least one of polyester-cotton blended yarn, polyester-flax blended yarn, polyester-ramie blended yarn, and polyester-regenerated cellulose blended yarn; and / or, In the modified polyester staple fiber, the blending ratio of polyester is between 30% and 60%.

8. A moisture-absorbing and quick-drying fabric, woven from yarn, characterized in that: The yarn at least includes the highly elastic and moisture-conductive polyester core-spun yarn as described in any one of claims 4 to 7.

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