Temperature control type sunscreen quick-drying fabric and preparation method thereof

Abstract

The invention relates to the technical field of textile materials, in particular to a temperature control type sun-proof quick-dry fabric preparation method, which comprises the following steps: weaving composite yarns into a gray fabric, and sequentially carrying out pretreatment, dyeing and after-treatment on the gray fabric to obtain the temperature control type sun-proof quick-dry fabric, wherein the composite yarn takes temperature-regulating viscose as an inner layer and takes aerogel modified special-shaped polyester yarn as a coating layer, the aerogel modified special-shaped polyester yarn wraps the temperature-regulating viscose in a Z-S reverse cross manner, and the linear density of the aerogel modified special-shaped polyester yarn is greater than that of the temperature-regulating viscose. The mass ratio of the temperature-adjusting viscose to the aerogel modified special-shaped polyester yarns is (40-50): (50-60). The fabric prepared by adopting the technical scheme has the outstanding characteristics of temperature regulation, ultraviolet resistance, moisture absorption, quick drying and the like.

Description

Technical Field

[0001] The invention relates to the technical field of textile materials, and in particular to a temperature-controlled sun-proof quick-drying fabric and a preparation method thereof. Background Art

[0002] The functionality of textiles originates from the functionality of yarns, which in turn realizes the functionality of fabrics, and finally can be reflected in the functionality of ready-made clothes. Therefore, well-known business, leisure, and sports apparel companies extend their research and development from design to material research and development. At present, national sports and fitness are being promoted and popularized. As the pace of modern work and life becomes faster, people need clothing suitable for multiple scenarios, especially clothing with both leisure and sports styles, which is increasingly favored by consumers. The market segment of such functional products is growing year by year, and people's requirements for clothing performance are no longer limited to a single function, but tend to be multi-functional, high-functional, and composite.

[0003] In recent years, the climate and environment have fluctuated more and more. In the hot summer, the temperature in some areas can reach above 40℃, which is equivalent to entering the high temperature "barbecue mode". The ultraviolet rays are strong and the skin is easily sunburned. Sunburn not only causes systemic damage to the skin, but in severe cases may also cause skin cancer. Wearing sunscreen functional clothing can prevent skin sunburn to a certain extent. Relevant scientific research institutions and brand clothing companies have developed a series of anti-ultraviolet functional textiles.

[0004] For example: Chinese patent publication number CN208080600U relates to a temperature-regulating sun-protective fabric, including a fabric body, on which is transparently provided at least one through hole; a covering part is connected to the fabric body around the through hole, and the covering part has a covering body, one end of the covering body is configured as a connecting end connected to the fabric body, and the other end of the covering body is configured as a free end; in a natural state, the covering body forms a cover for the through hole.

[0005] For another example, Chinese patent publication number CN117845622A discloses a temperature-regulating fabric with multifunctional effects and a preparation method thereof. A microcapsule emulsion is prepared by compounding natural peppermint oil with a phase change material closest to human body temperature. The emulsion is mixed with an adhesive and water to form a multifunctional finishing agent, which is applied to a fabric treated with cool silicone oil by a padding method to give the fabric multiple functions.

[0006] For another example: Chinese patent publication number CN117261377A relates to a waterproof, sweat-proof, quick-drying, and anti-ultraviolet fabric, and a preparation method and application thereof. Anti-ultraviolet modified polyester fiber and spandex fiber are blended to obtain a blended yarn, wherein the anti-ultraviolet modified polyester fiber includes nano-titanium dioxide, 4-propyleneoxy-2-hydroxybenzophenone and polyester fiber, and then woven to obtain an anti-ultraviolet fabric layer, cotton fiber and polyamide fiber are woven to obtain an anti-perspiration and quick-drying moisture-absorbing fabric layer, and silk fiber and cotton fiber are woven to obtain a skin-friendly fabric layer, and the fabric is obtained by sewing in the order of an outer anti-ultraviolet fabric layer, a middle anti-perspiration and quick-drying moisture-absorbing fabric layer, and an inner skin-friendly fabric layer.

[0007] However, existing sun protection clothing generally has a dense structure and a single function, and does not have the function of regulating temperature and humidity. It is stuffy to wear and the comfort needs to be improved. Summary of the invention

[0008] The invention aims to provide a temperature-controlled sun-proof quick-drying fabric and a preparation method thereof, which has outstanding characteristics of temperature regulation, UV resistance, moisture absorption and quick drying.

[0009] In order to achieve the above-mentioned invention object, the technical solution adopted by the present invention is: A method for preparing a temperature-controlled sun-proof quick-drying fabric comprises weaving a composite yarn into a grey cloth, and then sequentially performing pretreatment, dyeing and post-finishing on the grey cloth to obtain the temperature-controlled sun-proof quick-drying fabric; wherein the composite yarn has a temperature-regulating viscose as an inner layer and an aerogel-modified special-shaped polyester yarn as a covering layer, the aerogel-modified special-shaped polyester yarn cross-wraps the temperature-regulating viscose in Z and S directions in the opposite direction, the linear density of the aerogel-modified special-shaped polyester yarn is greater than the linear density of the temperature-regulating viscose, and the mass ratio of the temperature-regulating viscose to the aerogel-modified special-shaped polyester yarn is 40-50:50-60.

[0010] Preferably, the twist of Z and S twist is 30 twists / 10cm-70 twists / 10cm.

[0011] Preferably, the linear density of the temperature-regulating viscose in the composite yarn is 10 dtex-100 dtex, and the linear density of the aerogel-modified special-shaped polyester yarn is 70 dtex-200 dtex.

[0012] Preferably, the fabric structure of the grey cloth is a pearl mesh knitted fabric, a single mesh fabric or a sweatshirt lining fabric.

[0013] Preferably, the cross-sectional shape of the monofilament of the aerogel-modified special-shaped polyester yarn is four-grooved.

[0014] Preferably, the post-finishing includes hydrophilic finishing and shaping, the hydrophilic finishing adopts two dipping and two rolling, and the liquid rate is controlled at 15-30%; the hydrophilic finishing liquid includes 10-30g / L surfactant, 0.3-1g / L glycolic acid, and 3-15g / L magnesium chloride.

[0015] Preferably, the temperature-regulating viscose is a single-component fiber obtained by solution spinning by adding 5%-10% of phase change microcapsules to a viscose solution, or a sheath-core bicomponent fiber composed of conventional viscose as a sheath layer and a modified viscose with 5%-10% of phase change microcapsules added as a core layer, and the sheath-core mass ratio is 30:70-70:30; wherein the preparation method of the phase change microcapsules is: using paraffin wax and palm wax as core materials, mixing the core materials with a dispersant and an emulsifier at 40°C-90°C to obtain a core material mixed emulsion; using high-iminomethylated melamine resin and calcium oxide as wall materials, the mass ratio is 80-95:5-20, adding them dropwise to the core material mixed emulsion, and performing a cross-linking reaction at 80°C-100°C to obtain phase change microcapsules.

[0016] Preferably, the aerogel-modified shaped polyester yarn is obtained by spinning aerogel-modified shaped polyester staple fibers, with a linear density of 1.3dtex-2.3dtex and a length of 30mm-60mm; the aerogel-modified shaped polyester staple fibers are prepared by adding a titanium dioxide porous aerogel in a reactor by an in-situ polymerization method, and the aerogel-modified polyester slices are obtained by controlling the polymerization reaction process, and then the aerogel-modified polyester slices are hot-melted and screw-extruded into a shaped spinneret, and then spun and cut to obtain aerogel-modified polyester staple fibers; wherein the titanium dioxide porous aerogel has a particle size of less than 5μm and a pore size of 0.6cm 3 / g-0.8cm 3 / g, accounting for 2%-10% by mass.

[0017] Preferably, the processing technology of the aerogel-modified special-shaped polyester staple fiber is specifically as follows: ethylene glycol is added to a beating kettle, and terephthalic acid and a catalyst are slowly added under stirring. The beating time is 40min-50min, the reaction temperature is 250℃-260℃, and the reaction pressure is 90kpa-110kpa to obtain ethylene terephthalate; ethylene terephthalate is introduced into a comprehensive reaction kettle and continuously stirred. After 5min-10min, titanium dioxide porous aerogel, isophthalic acid, and ethylene glycol are added. After the addition is completed, a gradient gradual heating is performed. The gradient gradual heating includes three stages. The heating rates of the three stages are 1℃ / min and 3℃ / min. The heating is stopped when the temperature reaches 255℃-275℃, and the reaction is kept warm for 2 hours-5 hours. After the reaction is completed, stirring is stopped, and the material is discharged and pelletized to obtain aerogel-modified polyester chips.

[0018] The present invention also provides a temperature-controlled sun-proof quick-drying fabric prepared by the preparation method.

[0019] Compared with the prior art, the present invention has the following beneficial effects: 1. The addition of the titanium dioxide porous aerogel of the present invention makes it have good anti-ultraviolet performance. At the same time, the titanium dioxide aerogel is a porous structural material. The aerogel-modified special-shaped polyester yarn in the outer layer and its four-groove special-shaped cross-section give the fiber better moisture absorption and moisture conduction capabilities, accelerate diffusion evaporation to achieve quick-drying performance. In addition, aerogel technology avoids the damage of alkali treatment to strength. The alkali treatment is uneven, and its treatment temperature and time are different, which is difficult to control. There are large differences in the weight, style, and function of different batches of fabrics. This is the main problem that the microporous fibers and their finished products that rely on alkali treatment are difficult to promote and apply on a large scale.

[0020] 2. The temperature-regulating viscose of the present invention is used as the inner layer of the composite yarn and is coated by the aerogel-modified special-shaped polyester yarn, so as to solve the defect that the phase change microcapsules in the existing temperature-control fiber are subjected to friction, extrusion, and falling off during washing during the subsequent weaving and dyeing and finishing processes, resulting in a decrease in temperature regulating performance and strength. At the same time, the wall materials are selected to be high-iminomethylated melamine resin and calcium oxide, which can withstand temperatures above 250°C, thus solving the defect that the existing phase change microcapsules are not resistant to high temperatures, and will not be damaged during long-term subsequent dyeing and finishing treatments.

[0021] 3. The present invention strictly controls the amount of titanium dioxide porous aerogel added in the outer polyester yarn and its particle size and pore volume, and introduces calcium oxide into the wall material of the phase change microcapsule, so as to achieve a good balance between the anti-ultraviolet performance of the aerogel and the thermal conductivity and temperature regulating performance of the inner temperature regulating viscose, and also has good moisture absorption and quick-drying performance. The fabric prepared by the present invention has a dynamic heating maximum temperature control absolute value of more than 3.5°C, and a dynamic cooling maximum temperature control value of more than 2.2°C. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is the weaving pattern of the sweatshirt fabric according to Example 2 of the present invention.

[0023] Figure 2 This is the triangle diagram of the sweatshirt fabric of the second practical embodiment. DETAILED DESCRIPTION

[0024] Example 1 The present embodiment provides a method for preparing a temperature-controlled sun-proof quick-drying fabric, which includes preparing composite yarn, weaving, pre-treatment, dyeing and post-finishing to obtain the temperature-controlled sun-proof quick-drying fabric.

[0025] In the composite yarn preparation step, a temperature regulating viscose and an aerogel-modified shaped polyester yarn are first prepared respectively, and then the temperature regulating viscose is used as the inner layer and the aerogel-modified shaped polyester yarn is used as the covering layer. The aerogel-modified shaped polyester yarn is cross-wrapped with the temperature regulating viscose in opposite directions Z and S, so that the yarn twist is stable, not easy to unwind, and convenient for subsequent processing. The twist of Z and S twist is 50 twists / 10cm, the linear density of the temperature regulating viscose in the composite yarn is 60dtex, the linear density of the aerogel-modified shaped polyester yarn is 100dtex, and the mass ratio of the temperature regulating viscose to the aerogel-modified shaped polyester yarn is 51.5:48.5.

[0026] About the temperature-regulated viscose: it is a single-component fiber obtained by adding 8% phase-change microcapsules to a viscose solution and performing solution spinning, and the solution spinning temperature is 50°C.

[0027] The preparation method of the phase change microcapsule is as follows: paraffin wax and palm wax are used as core materials, the mass ratio of paraffin wax to palm wax is 30:70, the use of palm wax is more environmentally friendly on the one hand, and is used to adjust the melting temperature and crystallization temperature of the phase change microcapsule on the other hand; the core material is mixed with a dispersant and an emulsifier at 60°C, the emulsifier is OP-10, and the dispersant is a solvent formed by mixing an aromatic hydrocarbon solution and alkyd butyl ester in a mass ratio of 65:35, which can make the wall material distribution more uniform and stable, and obtain a core material mixed emulsion; high-iminomethylated melamine resin and calcium oxide in a mass ratio of 90:10 are used as wall materials, are added dropwise to the core material mixed emulsion, and a cross-linking reaction is carried out at 95°C to obtain a phase change microcapsule.

[0028] About aerogel-modified shaped polyester yarn: The aerogel-modified shaped polyester yarn is obtained by spinning aerogel-modified shaped polyester staple fibers, with a linear density of 2 dtex and a length of 50 mm. The aerogel-modified shaped polyester staple fibers are prepared by in-situ polymerization by adding titanium dioxide porous aerogel in a reactor, and the particle size of the titanium dioxide porous aerogel is less than 5 μm, and the pore volume is 0.8 cm 3 / g, and aerogel-modified polyester chips are obtained by controlling the polymerization reaction process, and then the aerogel-modified polyester chips are hot-melted and screw extruded into a four-groove special-shaped spinneret, and then spun and cut to obtain aerogel-modified polyester staple fibers with a four-groove cross-sectional shape.

[0029] The processing technology of the aerogel-modified special-shaped polyester staple fiber is specifically as follows: S21. Add ethylene glycol to a beating kettle, and slowly add terephthalic acid and a catalyst under stirring. The catalyst is 96% sulfuric acid and potassium hydroxide, which can significantly inhibit the etherification reaction and help stabilize the esterification reaction. The mass ratio of ethylene glycol to terephthalic acid is 40:60, the mass ratio of 96% sulfuric acid to terephthalic acid is 0.2:99.8, the mass ratio of potassium hydroxide to terephthalic acid is 0.05:99.95, the beating time is 50 min, the reaction temperature is 260°C, and the reaction pressure is 100 kPa to obtain ethylene terephthalate.

[0030] S22, introduce ethylene terephthalate into the integrated reactor, continue stirring, add titanium dioxide porous aerogel, isophthalic acid, and ethylene glycol after 10 minutes, the mass proportion of titanium dioxide porous aerogel is 8%, and the mass proportion of isophthalic acid is 10%. After the addition is completed, the temperature is gradually increased in a gradient manner, the reaction is more stable and sufficient, and the aerogel is more evenly distributed. The gradient gradual temperature increase includes three stages, the heating rates of the three stages are 1°C / min and 3°C / min, the heating time of the three stages is 120min, the heating is stopped when the temperature reaches 275°C, and the reaction is kept warm for 5 hours.

[0031] S23, after the reaction is completed, stirring is stopped, and the material is discharged and pelletized to obtain aerogel-modified polyester chips.

[0032] In the weaving step, composite yarn is used to weave on a knitting machine to obtain a grey cloth of a pique mesh knitted structure. The single pique mesh fabric is formed by regularly arranging loops and tucks at certain intervals, wherein loops and tucks are woven one by one in routes 1 and 3 respectively, and each knitting needle in routes 2 and 4 performs conventional loop weaving.

[0033] Table 1: Knitting process parameters of Example 1 The post-finishing step includes hydrophilic finishing and shaping, the shaping and drying temperature is 170° C., and the high-temperature shaping time is 4 minutes.

[0034] In the hydrophilic finishing step, two dipping and two rolling are performed, and the liquid carrying rate is controlled at 20%; the hydrophilic finishing liquid includes 25g / L surfactant, 0.5g / L glycolic acid, and 10g / L magnesium chloride, and the surfactant is sodium dodecylbenzene sulfonate. The application of the hydrophilic surfactant further removes impurities and dirt on the fabric, so that the fabric has a stable moisture absorption and quick-drying effect.

[0035] Example 2 The difference between this embodiment and the above-mentioned embodiment 1 is that the weaving steps are different and the mass ratio of the temperature-regulating viscose to the aerogel-modified special-shaped polyester yarn is 55.8:44.2. This embodiment is woven on a knitting machine to obtain a grey fabric of a sweater lining structure, and the process diagram is shown in FIG. Figure 1-2 .

[0036] Table 2: Specifications of yarns in each route in Example 2 Table 3: Knitting process parameters of Example 2 Comparative Example 1 The difference between this comparative example and the above-mentioned Example 2 is that the pore volume of the titanium dioxide porous aerogel is less than 0.6 cm 3 / g, specifically 0.45cm 3 / g.

[0037] Comparative Example 2 The difference between this comparative example and the above-mentioned Example 2 is that the wall material in the phase-change microcapsules is only high-iminomethylated melamine resin.

[0038] The physical properties of the above Examples 1-2 and Comparative Examples 1-2 were tested respectively, see Table 4.

[0039] Table 4: Test results of Examples 1-2 and Comparative Examples 1-2 of the present invention The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for illustrating the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which shall fall within the scope of the present invention to be protected. The scope of protection of the present invention shall be defined by the attached claims and their equivalents.

Claims

1. A method for preparing a temperature-controlled sun-proof quick-drying fabric, characterized in that: Composite yarn is used to weave grey cloth, and then the grey cloth is pre-treated, dyed and post-finished in sequence to obtain a temperature-controlled sun-proof quick-drying fabric; wherein the composite yarn has a temperature-regulating viscose as an inner layer and an aerogel-modified special-shaped polyester yarn as a covering layer, the aerogel-modified special-shaped polyester yarn cross-wraps the temperature-regulating viscose in Z and S directions in the opposite direction, the linear density of the aerogel-modified special-shaped polyester yarn is greater than the linear density of the temperature-regulating viscose, and the mass ratio of the temperature-regulating viscose to the aerogel-modified special-shaped polyester yarn is 40-50:50-60.

2. The method for preparing the temperature-controlled sun-proof quick-drying fabric according to claim 1, characterized in that: The twist of Z and S twist is 30 twists / 10cm-70 twists / 10cm.

3. The method for preparing the temperature-controlled sun-proof quick-drying fabric according to claim 1, characterized in that: The linear density of the temperature-regulating viscose in the composite yarn is 10 dtex-100 dtex, and the linear density of the aerogel-modified special-shaped polyester yarn is 70 dtex-200 dtex.

4. The method for preparing the temperature-controlled sun-proof quick-drying fabric according to claim 1, characterized in that: The fabric structure of the grey cloth is a pearl mesh knitted fabric, a single mesh fabric or a sweatshirt lining fabric.

5. The method for preparing the temperature-controlled sun-proof quick-drying fabric according to claim 1, characterized in that: The cross-sectional shape of the monofilament of the aerogel-modified special-shaped polyester yarn is four grooves.

6. The method for preparing the temperature-controlled sun-proof quick-drying fabric according to claim 1, characterized in that: The post-finishing includes hydrophilic finishing and shaping.

7. The method for preparing the temperature-controlled sun-proof quick-drying fabric according to claim 1, characterized in that: The temperature-regulating viscose is a single-component fiber obtained by adding 5%-10% of phase-change microcapsules to a viscose solution for solution spinning, or a sheath-core type bi-component fiber composed of conventional viscose as a sheath layer and modified viscose added with 5%-10% of phase-change microcapsules as a core layer; wherein the preparation method of the phase-change microcapsules is: paraffin wax and palm wax are used as core materials, the core materials are mixed with a dispersant and an emulsifier at 40°C-90°C to obtain a core material mixed emulsion; high-iminomethylated melamine resin and calcium oxide are used as wall materials, are added dropwise to the core material mixed emulsion, and a cross-linking reaction is carried out at 80°C-100°C to obtain phase-change microcapsules.

8. The method for preparing the temperature-controlled sun-proof quick-drying fabric according to claim 1, characterized in that: The aerogel-modified special-shaped polyester yarn is obtained by spinning aerogel-modified special-shaped polyester staple fibers. The aerogel-modified special-shaped polyester staple fibers are prepared by adding a titanium dioxide porous aerogel in a reactor by an in-situ polymerization method, and the aerogel-modified polyester slices are obtained by controlling the polymerization reaction process. The aerogel-modified polyester slices are then hot-melted and screw-extruded into a special-shaped spinneret, and then spun and cut to obtain aerogel-modified polyester staple fibers. The titanium dioxide porous aerogel has a particle size of less than 5 μm and a pore size of 0.6 cm. 3 / g-0.8cm 3 / g, accounting for 2%-10% by mass.

9. The method for preparing the temperature-controlled sun-proof quick-drying fabric according to claim 8, characterized in that: The processing technology of the aerogel-modified special-shaped polyester staple fiber is specifically as follows: adding ethylene glycol to a beating kettle, slowly adding terephthalic acid and a catalyst under stirring, the beating time is 40min-50min, the reaction temperature is 250℃-260℃, the reaction pressure is 90kpa-110kpa, and ethylene terephthalate is obtained; introducing ethylene terephthalate into a comprehensive reaction kettle, continuously stirring, adding titanium dioxide porous aerogel, isophthalic acid, and ethylene glycol after 5min-10min, and gradually heating up the temperature after the addition is completed, the gradient gradual heating includes three stages, the heating rates of the three stages are 1℃ / min and 3℃ / min, the heating is stopped when the temperature reaches 255℃-275℃, and the reaction is kept warm for 2h-5h; after the reaction is completed, stirring is stopped, the material is discharged, and pelletized to obtain aerogel-modified polyester chips.

10. A temperature-controlled sun-proof quick-drying fabric prepared by the preparation method according to any one of claims 1 to 9.

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