Printing and dyeing method of nylon fabric

Abstract

The invention discloses a printing and dyeing method of a nylon fabric, which comprises the following steps: modifying nylon 510 and nylon 66 with nano aluminum oxide and nano silicon dioxide respectively, blending to obtain the nylon fabric, and sequentially soaking the nylon fabric in an acid dye and an active dye to finish the printing and dyeing process of the nylon fabric. According to the invention, nylon 510 and nylon 66 tend to be combined with reactive dye and acid dye respectively, targeted dye selection can be carried out according to the specificity of the blended fabric, blended fibers can be combined with the dye respectively, the dyeing efficiency can be improved respectively, the dyeing effect can be improved, and the fabric quality can be improved. The defects that in the prior art, the dyeing process of bio-based nylon 510 nylon blended fabric is complex, and the overall dyeing effect is poor are overcome. The acid dye and the reactive dye are respectively placed in a low-temperature environment and a high-temperature environment for printing and dyeing, so that the dyeing tendencies of nylon 510 and nylon 66 can be greatly distinguished, the two fibers can be respectively dyed, and the dyeing efficiency and the dyeing fastness are improved.

Description

Technical Field

[0001] The invention relates to the technical field of fabric printing and dyeing, in particular to a printing and dyeing method for nylon fabric. Background Art

[0002] Bio-based nylon 510 is a nylon material synthesized from bio-based raw materials extracted from renewable resources such as castor oil and corn stalks. Nylon 510 has high color fastness and good stability, and is a good textile material. Blending bio-based nylon 510 with other nylons can provide better softness, wrinkle resistance and warmth retention.

[0003] However, since the dyeing properties of bio-based nylon 510 are different from those of other petroleum-based nylons, uneven dyeing may occur during dyeing.

[0004] Therefore, there is a need to improve the current printing and dyeing methods of bio-based 510 nylon. Summary of the invention

[0005] The present invention overcomes the shortcomings of the prior art and provides a printing and dyeing method for nylon fabrics, aiming to solve the defects in the prior art that the dyeing process of bio-based nylon 510 nylon blended fabrics is complicated, resulting in poor overall dyeing effect.

[0006] To achieve the above object, the technical solution adopted by the present invention is: a printing and dyeing method for nylon fabric, characterized in that it comprises the following steps:

[0007] S1: Soaking nylon 510 fiber in nano-alumina suspension for 1-2 hours, taking it out and drying it to obtain modified nylon 510 fiber;

[0008] S2: Soaking nylon 66 fiber in nano-silicon dioxide suspension for 2-4 hours, taking it out and drying it to obtain modified nylon 66 fiber;

[0009] S3: using the modified nylon 66 fiber in S2 as a warp and the modified nylon 510 fiber in S1 as a weft for weaving, the weaving pattern is a twill pattern, to obtain a modified nylon fabric;

[0010] S4: soaking the modified nylon fabric in S4 in an acid dye for 3-4 hours, taking it out and drying it, and then soaking it in a reactive dye for 2-3 hours, wherein the pH of the reactive dye is 8-9, and taking it out and drying it to complete the printing and dyeing process of the modified nylon fabric.

[0011] In a preferred embodiment of the present invention, the diameter of the nano-alumina particles in the nano-alumina suspension in S1 is 20-40 nm, and the concentration of the nano-alumina suspension is 5%-10%.

[0012] In a preferred embodiment of the present invention, the pH of the nano-alumina suspension in S1 is 6-7, the pH is adjusted by adding dilute hydrochloric acid, and ultrasonic stirring is performed during the immersion process, and the ultrasonic frequency is 40-60kHz.

[0013] In a preferred embodiment of the present invention, the nylon 510 fiber in S1 has a fineness of 10-20D, and the nylon 510 fiber is plasma treated.

[0014] In a preferred embodiment of the present invention, the diameter of the nano-silicon dioxide particles in the nano-silicon dioxide suspension in S2 is 10-20 nm, and the concentration of the nano-silicon dioxide suspension is 3%-5%.

[0015] In a preferred embodiment of the present invention, the preparation process of the nano-silica suspension is: add nano-silica powder and polyacetal oligomers to a 15-20% methanol aqueous solution, stir for 20-30 minutes, and obtain the nano-silica suspension, wherein the concentration of the polyacetal oligomer in the nano-silica suspension is 1-2%, and the molecular weight of the polyacetal oligomer is 5k-10k.

[0016] In a preferred embodiment of the present invention, the fineness of the nylon 66 fiber in S2 is 50-70D, and the nylon 66 fiber is stretched during the soaking process, with a stretching ratio of 1:1.2-1.5, and the stretching direction is consistent with the axial direction of the nylon 66 fiber.

[0017] In a preferred embodiment of the present invention, the twill pattern in S3 is 2 / 1 twill, and the warp density and weft density are 45-50 strands / 10cm and 60-70 strands / 10cm respectively.

[0018] In a preferred embodiment of the present invention, the acid dye in S4 is one of acid red No. 37 and acid blue No. 25, and the concentration of the acid dye is 1-1.5%; the reactive dye is one of reactive yellow No. 147 and reactive black No. 5, and the concentration of the reactive dye is 2-3%.

[0019] In a preferred embodiment of the present invention, the temperature at which the modified nylon fabric described in S4 is immersed in acid dyes is 40-60°C, and the temperature at which the modified nylon fabric is immersed in reactive dyes is 80-90°C.

[0020] The present invention solves the defects existing in the background technology and has the following beneficial effects:

[0021] (1) The present invention provides a nylon fabric printing and dyeing method, wherein nylon 510 and nylon 66 are modified by nano-alumina and nano-silicon dioxide, respectively, and then blended to obtain nylon fabric, and the nylon fabric is sequentially immersed in acid dyes and reactive dyes to complete the printing and dyeing process of the nylon fabric, so that nylon 510 and nylon 66 tend to combine with reactive dyes and acid dyes, respectively. Compared with the nylon fabric printing and dyeing technology in the prior art, the present invention can select dyes according to the specific characteristics of the blended fabric, and can make the blended fibers combine with dyes respectively, so that the dyeing efficiency of each fiber is improved, and the dyeing effect is improved, thereby solving the defect that the dyeing process of bio-based nylon 510 and nylon blended fabric in the prior art is complicated, which will result in poor overall dyeing effect.

[0022] (2) In the present invention, nano-silica powder and polyacetal oligomer are added to a methanol aqueous solution and stirred to obtain a nano-silica suspension. The polyacetal oligomer is grafted on the surface of the nano-silica to establish a steric hindrance stabilization layer. Compared with the prior art, the compatibility of the nanoparticles with the resin matrix can be enhanced, the wettability of the nano-silica surface can be improved, the interfacial compatibility in the medium can be enhanced, and the dyeing uniformity and color fastness can be improved.

[0023] (3) In the present invention, acid dyes and reactive dyes are placed in low temperature and high temperature environments for printing and dyeing respectively. Low temperature is conducive to the combination of hydrogen bonds, and high temperature is conducive to the combination of chemical bonds. Compared with the prior art, the dyeing tendencies of nylon 510 and nylon 66 can be more distinguished, so that these two fibers can be dyed separately, thereby improving the dyeing efficiency and dyeing fastness. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art are briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative work.

[0025] Figure 1 It is a method step diagram of a preferred embodiment of the present invention. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited to the specific embodiments disclosed below.

[0028] like Figure 1 As shown, a printing and dyeing method for nylon fabric comprises the following steps:

[0029] S1: Soaking nylon 510 fiber in nano-alumina suspension for 1-2 hours, taking it out and drying it to obtain modified nylon 510 fiber;

[0030] S2: Soak nylon 66 fiber in nano-silicon dioxide suspension for 2-4 hours, take it out and dry it to obtain modified nylon 66 fiber; the modification of nano-alumina and nano-silicon dioxide can improve the surface properties of nylon fiber and enhance its affinity with dyes, thereby improving the uniformity and fastness of dyeing. Through nano-material modification, the wear resistance and chemical resistance of the fiber can be enhanced, thereby improving the durability of the final fabric.

[0031] S3: using the modified nylon 66 fiber in S2 as the warp and the modified nylon 510 fiber in S1 as the weft for weaving, the weaving pattern is a twill pattern, and a modified nylon fabric is obtained;

[0032] S4: The modified nylon fabric in S4 is first soaked in an acid dye for 3-4 hours and then taken out and dried, and then soaked in a reactive dye for 2-3 hours, the pH of the reactive dye is 8-9, and then taken out and dried to complete the printing and dyeing process of the modified nylon fabric.

[0033] After nylon 510 and nylon 66 are modified with nano-alumina and nano-silicon dioxide respectively, they are blended to obtain nylon fabrics, and the nylon fabrics are soaked in acid dyes and reactive dyes in turn to complete the printing and dyeing process of the nylon fabrics, so that nylon 510 and nylon 66 tend to combine with reactive dyes and acid dyes respectively, and targeted dyes can be selected according to the specific characteristics of the blended fabrics, and the blended fibers can be combined with dyes respectively, and the dyeing efficiency of each is improved, and the dyeing effect can be improved, thereby solving the defect that the dyeing process of bio-based nylon 510 and nylon blended fabrics in the prior art is complicated, which will lead to poor overall dyeing effect.

[0034] The diameter size of the nano-alumina particles in the nano-alumina suspension in S1 is 20-40nm, and the concentration of the nano-alumina suspension is 5%-10%. The diameter size of the nano-alumina particles is in the range of 20-40nm, which is conducive to maintaining the uniform dispersion of the particles in the suspension and avoiding the agglomeration of large particles, thereby improving the stability of the suspension. Smaller particle size helps to increase the specific surface area of ​​the particles and enhance the contact area with the nylon fiber, thereby improving the modification effect. The size and concentration of nano-alumina particles have a direct impact on the modification effect of nylon fibers. The particle size of 20-40nm is conducive to the particles penetrating into the fiber and improving the modification uniformity. The concentration of 5%-10% provides sufficient opportunities for nano-alumina to contact the fiber, which not only ensures the modification effect, but also avoids the agglomeration and handling difficulties that may be caused by excessive concentration. The nylon 510 fiber modified with nano-alumina is more inclined to bind to reactive dyes. This specific affinity can be optimized by controlling the size and concentration of nano-alumina, thereby improving the dyeing effect and uniformity.

[0035] The pH value of the nano-alumina suspension in S1 is 6-7. The pH value is adjusted by adding dilute hydrochloric acid and performing ultrasonic stirring during the soaking process. The ultrasonic frequency is 40-60kHz. The pH value of 6-7 is close to neutral, which is beneficial to protect the operator and the environment and reduce irritation to the skin and mucous membranes. The pH value has a significant effect on the rate and direction of chemical reactions. Under conditions close to neutrality, the reaction between nano-alumina and nylon fibers can be optimized to avoid side reactions or material degradation that may be caused by over-acid or over-alkaline conditions. Dilute hydrochloric acid can accurately adjust the pH value to ensure that the pH of the suspension is stable at 6-7, providing the best conditions for the interaction between nano-alumina and nylon fibers. Ultrasonic stirring can produce mechanical vibration and cavitation effects, which helps to evenly disperse nano-alumina particles in the suspension and improve the modification effect. Ultrasonic stirring helps to improve the uniformity of fiber surface modification and avoid local over-modification or under-modification.

[0036] The fineness of nylon 510 fiber in S1 is 10-20D, and nylon 510 fiber has been treated with plasma. Plasma treatment can change the surface properties of nylon fiber, introduce new functional groups, increase surface roughness, thereby improving the affinity between fiber and dye, making dyeing more uniform and firm. Plasma treatment can introduce active functional groups such as hydroxyl, carbonyl and carboxyl groups on the surface of nylon fiber. These functional groups can enhance the chemical activity of the fiber and facilitate subsequent chemical modification. Through plasma treatment, the dimensional change of nylon fiber during processing and use can be reduced, and its dimensional stability can be improved.

[0037] The diameter size of the nano-silica particles in the nano-silica suspension in S2 is 10-20nm, and the concentration of the nano-silica suspension is 3%-5%. The diameter size of the nano-silica particles is within the range of 10-20nm, which is conducive to maintaining the uniform dispersion of the particles in the suspension and avoiding the agglomeration of large particles, thereby improving the stability of the suspension. Smaller particle size helps to increase the specific surface area of ​​the particles and enhance the contact area with the nylon fiber, thereby improving the modification effect. The size and concentration of nano-silica particles have a direct impact on the modification effect of nylon fibers. The particle size of 10-20nm is conducive to the particles penetrating into the fiber and improving the modification uniformity. The concentration of 3%-5% provides sufficient opportunities for nano-silica to contact with the fiber, which not only ensures the modification effect, but also avoids the agglomeration and handling difficulties that may be caused by excessive concentration. Nylon 66 fibers modified with nano-silica are more inclined to bind to acid dyes. This specific affinity can be optimized by controlling the size and concentration of nano-silica, thereby improving the dyeing effect and uniformity.

[0038] The preparation process of the nano-silica suspension is as follows: adding nano-silica powder and polyacetal oligomer to a 15-20% methanol aqueous solution, stirring for 20-30 minutes, and obtaining a nano-silica suspension, wherein the concentration of polyacetal oligomer in the nano-silica suspension is 1-2%, and the molecular weight of the polyacetal oligomer is 5k-10k. The concentration of polyacetal oligomer in the nano-silica suspension is 1-2%, which helps to improve the dispersion stability of nano-silica particles in the suspension. Polyacetal oligomer can be used as a dispersant to reduce the agglomeration between particles and improve the uniformity of the suspension. Polyacetal oligomer is grafted on the surface of nano-silica to establish a steric stabilization layer and enhance the compatibility of nano-particles with the resin matrix. This is crucial to improving the mechanical properties and durability of composite materials. The grafting of polyacetal oligomer can improve the wettability of the nano-silica surface, enhance its interfacial compatibility in the medium, and make it easier for nano-particles to disperse in the polymer medium. The addition of polyacetal oligomers helps to reduce the agglomeration of nano-silica particles, thereby obtaining a more uniform dispersion system.

[0039] The fineness of the nylon 66 fiber in S2 is 50-70D. The nylon 66 fiber is stretched during the soaking process, and the stretching ratio is 1:1.2-1.5. The stretching direction is consistent with the axial direction of the nylon 66 fiber. Through stretching, the molecular chains of the nylon 66 fiber will be stretched and oriented along the fiber axis, thereby improving the orientation of the fiber. High orientation helps to improve the mechanical properties of the fiber, such as strength and modulus. Stretching can increase the crystallinity and orderliness of the molecular chains of the nylon 66 fiber, thereby enhancing the tensile strength and elongation at break of the fiber. During the stretching process, the fiber surface becomes smoother, which helps the penetration and uniform distribution of the dye molecules, thereby improving the dyeing performance. After heat treatment, the thermal stability of the stretched nylon 66 fiber is improved, which is very important for the thermal stability performance during subsequent processing and use. Stretching can reduce the shrinkage rate of the fiber during subsequent processing and use, and improve the dimensional stability of the product.

[0040] The twill pattern in S3 is 2 / 1 twill, with warp and weft densities of 45-50 strands / 10cm and 60-70 strands / 10cm respectively. Compared with the plain weave structure, the diagonal lines formed by the interlacing of warp and weft yarns in the 2 / 1 twill pattern can improve the overall strength and durability of the fabric. The twill structure makes the friction between the yarns greater when the fabric is stretched, thereby improving the stability and tensile resistance of the fabric. The twill structure can accurately control the pore size by adjusting the thickness and weaving density of the yarn to achieve filtering requirements of different precisions. At the same time, the surface of the filter cloth with a twill structure is not easy to accumulate particulate matter, has good anti-clogging performance, and is easy to clean and regenerate. The interlacing of yarns in the twill structure can provide better elasticity and recovery, so that the fabric can better recover to its original state after being subjected to external force.

[0041] The acid dye in S4 is one of acid red 37 and acid blue 25, and the concentration of the acid dye is 1-1.5%. The reactive dye is one of reactive yellow 147 and reactive black 5, and the concentration of the reactive dye is 2-3%. As acid dyes, acid red 37 and acid blue 25 are suitable for dyeing protein fibers and polyamide fibers, and can provide bright colors and good color fastness. Acid dyes are dyed under acidic conditions, which is conducive to the combination of dyes and fibers. As reactive dyes, reactive yellow 147 and reactive black 5 form covalent bonds with fibers, providing higher color fastness and washing resistance. The high reactivity of reactive dyes enables them to have better fixation rate during dyeing. The concentration of acid dyes is set to 1-1.5%, and the concentration of reactive dyes is set to 2-3%. Such a concentration range can accurately control the dyeing depth, meet the needs of different color depths, and avoid wasting dyes. Appropriate dye concentration helps to improve dyeing uniformity and avoid uneven dyeing caused by too high or too low concentration. The high fixation rate of reactive dyes and the directness of acid dyes work together to improve the color fastness of dyed products, including light fastness and washing fastness.

[0042] The temperature of the modified nylon fabric in S4 when immersed in acid dyes is 40-60℃, and the temperature when immersed in reactive dyes is 80-90℃. Nylon fibers begin to absorb acid dyes in the temperature range of 40-60℃, and the dyeing rate accelerates as the temperature rises. This temperature range helps the acid dyes to combine with nylon fibers, improving the dyeing affinity and dyeing rate. At a temperature of 80-90℃, the dyeing rate of reactive dyes increases significantly, which helps the reactive dyes to form covalent bonds with nylon fibers and improve the uniformity and color fastness of dyeing. Proper temperature control helps to optimize the dyeing process and avoid problems such as uneven dyeing or insufficient color fastness caused by too high or too low temperature. Avoid excessively high temperatures from damaging nylon fibers. For example, excessive heat treatment may cause the fiber strength to decrease or deform. Appropriate temperature helps to protect the physical properties of the fiber.

[0043] Embodiment 1

[0044] A printing and dyeing method for nylon fabrics comprises the following steps:

[0045] S1: Soak the nylon 510 fiber in the nano-alumina suspension for 1 hour. The fineness of the nylon 510 fiber is 10D. The nylon 510 fiber is treated with plasma. The diameter of the nano-alumina particles in the nano-alumina suspension is 30nm. The concentration of the nano-alumina suspension is 8%. The pH of the nano-alumina suspension is 6.5. The pH is adjusted by adding dilute hydrochloric acid. Ultrasonic stirring is performed during the soaking process. The ultrasonic frequency is 50kHz. After taking out and drying, the modified nylon 510 fiber is obtained.

[0046] S2: soaking nylon 66 fiber in nano-silica suspension for 2 hours, the fineness of nylon 66 fiber is 60D, stretching the nylon 66 fiber during soaking, the stretching ratio is 1:1.2, the stretching direction is consistent with the axial direction of nylon 66 fiber, the diameter of nano-silica particles in the nano-silica suspension is 10nm, the concentration of the nano-silica suspension is 4%, and the preparation process of the nano-silica suspension is as follows: adding nano-silica powder and polyacetal oligomer to 20% methanol aqueous solution, stirring for 30 minutes, obtaining nano-silica suspension, the concentration of polyacetal oligomer in the nano-silica suspension is 2%, and the molecular weight of the polyacetal oligomer is 10k, taking out and drying to obtain modified nylon 66 fiber;

[0047] S3: using the modified nylon 66 fiber in S2 as the warp and the modified nylon 510 fiber in S1 as the weft for weaving, the weaving pattern is a twill pattern, the twill pattern is a 2 / 1 twill, the warp density and the weft density are 45 strands / 10cm and 70 strands / 10cm respectively, to obtain a modified nylon fabric;

[0048] S4: The modified nylon fabric in S4 is first soaked in acid red dye No. 37 for 3 hours and then taken out and dried. The soaking temperature is 30°C and the concentration of the acid dye is 1%. It is then soaked in reactive yellow dye No. 147 for 2 hours. The concentration of the reactive dye is 3%. The pH of reactive yellow dye No. 147 is 8-9 and the soaking temperature is 80°C. After taking out and drying, the printing and dyeing process of the modified nylon fabric is completed.

[0049] Embodiment 2

[0050] A printing and dyeing method for nylon fabrics comprises the following steps:

[0051] S1: Soak the nylon 510 fiber in the nano-alumina suspension for 1 hour. The fineness of the nylon 510 fiber is 10D. The nylon 510 fiber is treated with plasma. The diameter of the nano-alumina particles in the nano-alumina suspension is 30nm. The concentration of the nano-alumina suspension is 8%. The pH of the nano-alumina suspension is 6.5. The pH is adjusted by adding dilute hydrochloric acid. Ultrasonic stirring is performed during the soaking process. The ultrasonic frequency is 50kHz. After taking out and drying, the modified nylon 510 fiber is obtained.

[0052] S2: soaking nylon 66 fiber in nano-silica suspension for 2 hours, the fineness of nylon 66 fiber is 60D, stretching the nylon 66 fiber during soaking, the stretching ratio is 1:1.2, the stretching direction is consistent with the axial direction of nylon 66 fiber, the diameter of nano-silica particles in the nano-silica suspension is 10nm, the concentration of the nano-silica suspension is 4%, and the preparation process of the nano-silica suspension is as follows: adding nano-silica powder and polyacetal oligomer to 20% methanol aqueous solution, stirring for 30 minutes, obtaining nano-silica suspension, the concentration of polyacetal oligomer in the nano-silica suspension is 2%, and the molecular weight of the polyacetal oligomer is 10k, taking out and drying to obtain modified nylon 66 fiber;

[0053] S3: using the modified nylon 66 fiber in S2 as the warp and the modified nylon 510 fiber in S1 as the weft for weaving, the weaving pattern is a twill pattern, the twill pattern is a 2 / 1 twill, the warp density and the weft density are 45 strands / 10cm and 70 strands / 10cm respectively, to obtain a modified nylon fabric;

[0054] S4: The modified nylon fabric in S4 is first soaked in acid red dye No. 37 for 3 hours and then taken out and dried. The soaking temperature is 40°C and the concentration of the acid dye is 1%. It is then soaked in reactive yellow dye No. 147 for 2 hours. The concentration of the reactive dye is 3%. The pH of reactive yellow dye No. 147 is 8-9 and the soaking temperature is 80°C. After taking out and drying, the printing and dyeing process of the modified nylon fabric is completed.

[0055] Embodiment 3

[0056] A printing and dyeing method for nylon fabrics comprises the following steps:

[0057] S1: Soak the nylon 510 fiber in the nano-alumina suspension for 1 hour. The fineness of the nylon 510 fiber is 10D. The nylon 510 fiber is treated with plasma. The diameter of the nano-alumina particles in the nano-alumina suspension is 30nm. The concentration of the nano-alumina suspension is 8%. The pH of the nano-alumina suspension is 6.5. The pH is adjusted by adding dilute hydrochloric acid. Ultrasonic stirring is performed during the soaking process. The ultrasonic frequency is 50kHz. After taking out and drying, the modified nylon 510 fiber is obtained.

[0058] S2: soaking nylon 66 fiber in nano-silica suspension for 2 hours, the fineness of nylon 66 fiber is 60D, stretching the nylon 66 fiber during soaking, the stretching ratio is 1:1.2, the stretching direction is consistent with the axial direction of nylon 66 fiber, the diameter of nano-silica particles in the nano-silica suspension is 10nm, the concentration of the nano-silica suspension is 4%, and the preparation process of the nano-silica suspension is as follows: adding nano-silica powder and polyacetal oligomer to 20% methanol aqueous solution, stirring for 30 minutes, obtaining nano-silica suspension, the concentration of polyacetal oligomer in the nano-silica suspension is 2%, and the molecular weight of the polyacetal oligomer is 10k, taking out and drying to obtain modified nylon 66 fiber;

[0059] S3: using the modified nylon 66 fiber in S2 as the warp and the modified nylon 510 fiber in S1 as the weft for weaving, the weaving pattern is a twill pattern, the twill pattern is a 2 / 1 twill, the warp density and the weft density are 45 strands / 10cm and 70 strands / 10cm respectively, to obtain a modified nylon fabric;

[0060] S4: The modified nylon fabric in S4 is first soaked in acid red dye No. 37 for 3 hours and then taken out and dried. The soaking temperature is 50°C and the concentration of the acid dye is 1%. It is then soaked in reactive yellow dye No. 147 for 2 hours. The concentration of the reactive dye is 3%. The pH of reactive yellow dye No. 147 is 8-9 and the soaking temperature is 80°C. After taking out and drying, the printing and dyeing process of the modified nylon fabric is completed.

[0061] Embodiment 4

[0062] A printing and dyeing method for nylon fabrics comprises the following steps:

[0063] S1: Soak the nylon 510 fiber in the nano-alumina suspension for 1 hour. The fineness of the nylon 510 fiber is 10D. The nylon 510 fiber is treated with plasma. The diameter of the nano-alumina particles in the nano-alumina suspension is 30nm. The concentration of the nano-alumina suspension is 8%. The pH of the nano-alumina suspension is 6.5. The pH is adjusted by adding dilute hydrochloric acid. Ultrasonic stirring is performed during the soaking process. The ultrasonic frequency is 50kHz. After taking out and drying, the modified nylon 510 fiber is obtained.

[0064] S2: soaking nylon 66 fiber in nano-silica suspension for 2 hours, the fineness of nylon 66 fiber is 60D, stretching the nylon 66 fiber during soaking, the stretching ratio is 1:1.2, the stretching direction is consistent with the axial direction of nylon 66 fiber, the diameter of nano-silica particles in the nano-silica suspension is 10nm, the concentration of the nano-silica suspension is 4%, and the preparation process of the nano-silica suspension is as follows: adding nano-silica powder and polyacetal oligomer to 20% methanol aqueous solution, stirring for 30 minutes, obtaining nano-silica suspension, the concentration of polyacetal oligomer in the nano-silica suspension is 2%, and the molecular weight of the polyacetal oligomer is 10k, taking out and drying to obtain modified nylon 66 fiber;

[0065] S3: using the modified nylon 66 fiber in S2 as the warp and the modified nylon 510 fiber in S1 as the weft for weaving, the weaving pattern is a twill pattern, the twill pattern is a 2 / 1 twill, the warp density and the weft density are 45 strands / 10cm and 70 strands / 10cm respectively, to obtain a modified nylon fabric;

[0066] S4: The modified nylon fabric in S4 is first soaked in acid red dye No. 37 for 3 hours and then taken out and dried. The soaking temperature is 60°C and the concentration of the acid dye is 1%. It is then soaked in reactive yellow dye No. 147 for 2 hours. The concentration of the reactive dye is 3%. The pH of reactive yellow dye No. 147 is 8-9 and the soaking temperature is 80°C. After taking out and drying, the printing and dyeing process of the modified nylon fabric is completed.

[0067] Embodiment 5

[0068] A printing and dyeing method for nylon fabrics comprises the following steps:

[0069] S1: Soak the nylon 510 fiber in the nano-alumina suspension for 1 hour. The fineness of the nylon 510 fiber is 10D. The nylon 510 fiber is treated with plasma. The diameter of the nano-alumina particles in the nano-alumina suspension is 30nm. The concentration of the nano-alumina suspension is 8%. The pH of the nano-alumina suspension is 6.5. The pH is adjusted by adding dilute hydrochloric acid. Ultrasonic stirring is performed during the soaking process. The ultrasonic frequency is 50kHz. After taking out and drying, the modified nylon 510 fiber is obtained.

[0070] S2: soaking nylon 66 fiber in nano-silica suspension for 2 hours, the fineness of nylon 66 fiber is 60D, stretching the nylon 66 fiber during soaking, the stretching ratio is 1:1.2, the stretching direction is consistent with the axial direction of nylon 66 fiber, the diameter of nano-silica particles in the nano-silica suspension is 10nm, the concentration of the nano-silica suspension is 4%, and the preparation process of the nano-silica suspension is as follows: adding nano-silica powder and polyacetal oligomer to 20% methanol aqueous solution, stirring for 30 minutes, obtaining nano-silica suspension, the concentration of polyacetal oligomer in the nano-silica suspension is 2%, and the molecular weight of the polyacetal oligomer is 10k, taking out and drying to obtain modified nylon 66 fiber;

[0071] S3: using the modified nylon 66 fiber in S2 as the warp and the modified nylon 510 fiber in S1 as the weft for weaving, the weaving pattern is a twill pattern, the twill pattern is a 2 / 1 twill, the warp density and the weft density are 45 strands / 10cm and 70 strands / 10cm respectively, to obtain a modified nylon fabric;

[0072] S4: The modified nylon fabric in S4 is first soaked in acid red dye No. 37 for 3 hours and then taken out and dried. The soaking temperature is 70°C and the concentration of the acid dye is 1%. It is then soaked in reactive yellow dye No. 147 for 2 hours. The concentration of the reactive dye is 3%. The pH of reactive yellow dye No. 147 is 8-9 and the soaking temperature is 80°C. After taking out and drying, the printing and dyeing process of the modified nylon fabric is completed.

[0073] Embodiment 6

[0074] A printing and dyeing method for nylon fabrics comprises the following steps:

[0075] S1: Soak the nylon 510 fiber in the nano-alumina suspension for 1 hour. The fineness of the nylon 510 fiber is 10D. The nylon 510 fiber is treated with plasma. The diameter of the nano-alumina particles in the nano-alumina suspension is 30nm. The concentration of the nano-alumina suspension is 8%. The pH of the nano-alumina suspension is 6.5. The pH is adjusted by adding dilute hydrochloric acid. Ultrasonic stirring is performed during the soaking process. The ultrasonic frequency is 50kHz. After taking out and drying, the modified nylon 510 fiber is obtained.

[0076] S2: soaking nylon 66 fiber in nano-silica suspension for 2 hours, the fineness of nylon 66 fiber is 60D, stretching the nylon 66 fiber during soaking, the stretching ratio is 1:1.2, the stretching direction is consistent with the axial direction of nylon 66 fiber, the diameter of nano-silica particles in the nano-silica suspension is 10nm, the concentration of the nano-silica suspension is 4%, and the preparation process of the nano-silica suspension is as follows: adding nano-silica powder and polyacetal oligomer to 20% methanol aqueous solution, stirring for 30 minutes, obtaining nano-silica suspension, the concentration of polyacetal oligomer in the nano-silica suspension is 2%, and the molecular weight of the polyacetal oligomer is 10k, taking out and drying to obtain modified nylon 66 fiber;

[0077] S3: using the modified nylon 66 fiber in S2 as the warp and the modified nylon 510 fiber in S1 as the weft for weaving, the weaving pattern is a twill pattern, the twill pattern is a 2 / 1 twill, the warp density and the weft density are 45 strands / 10cm and 70 strands / 10cm respectively, to obtain a modified nylon fabric;

[0078] S4: The modified nylon fabric in S4 is first soaked in acid red dye No. 37 for 3 hours and then taken out and dried. The soaking temperature is 50°C and the concentration of the acid dye is 1%. It is then soaked in reactive yellow dye No. 147 for 2 hours. The concentration of the reactive dye is 3%. The pH of reactive yellow dye No. 147 is 8-9 and the soaking temperature is 75°C. After taking out and drying, the printing and dyeing process of the modified nylon fabric is completed.

[0079] Embodiment 7

[0080] A printing and dyeing method for nylon fabrics comprises the following steps:

[0081] S1: Soak the nylon 510 fiber in the nano-alumina suspension for 1 hour. The fineness of the nylon 510 fiber is 10D. The nylon 510 fiber is treated with plasma. The diameter of the nano-alumina particles in the nano-alumina suspension is 30nm. The concentration of the nano-alumina suspension is 8%. The pH of the nano-alumina suspension is 6.5. The pH is adjusted by adding dilute hydrochloric acid. Ultrasonic stirring is performed during the soaking process. The ultrasonic frequency is 50kHz. After taking out and drying, the modified nylon 510 fiber is obtained.

[0082] S2: soaking nylon 66 fiber in nano-silica suspension for 2 hours, the fineness of nylon 66 fiber is 60D, stretching the nylon 66 fiber during soaking, the stretching ratio is 1:1.2, the stretching direction is consistent with the axial direction of nylon 66 fiber, the diameter of nano-silica particles in the nano-silica suspension is 10nm, the concentration of the nano-silica suspension is 4%, and the preparation process of the nano-silica suspension is as follows: adding nano-silica powder and polyacetal oligomer to 20% methanol aqueous solution, stirring for 30 minutes, obtaining nano-silica suspension, the concentration of polyacetal oligomer in the nano-silica suspension is 2%, and the molecular weight of the polyacetal oligomer is 10k, taking out and drying to obtain modified nylon 66 fiber;

[0083] S3: using the modified nylon 66 fiber in S2 as the warp and the modified nylon 510 fiber in S1 as the weft for weaving, the weaving pattern is a twill pattern, the twill pattern is a 2 / 1 twill, the warp density and the weft density are 45 strands / 10cm and 70 strands / 10cm respectively, to obtain a modified nylon fabric;

[0084] S4: The modified nylon fabric in S4 is first soaked in acid red dye No. 37 for 3 hours and then taken out and dried. The soaking temperature is 50°C and the concentration of the acid dye is 1%. It is then soaked in reactive yellow dye No. 147 for 2 hours. The concentration of the reactive dye is 3%. The pH of reactive yellow dye No. 147 is 8-9 and the soaking temperature is 85°C. After taking out and drying, the printing and dyeing process of the modified nylon fabric is completed.

[0085] Embodiment 8

[0086] A printing and dyeing method for nylon fabrics comprises the following steps:

[0087] S1: Soak the nylon 510 fiber in the nano-alumina suspension for 1 hour. The fineness of the nylon 510 fiber is 10D. The nylon 510 fiber is treated with plasma. The diameter of the nano-alumina particles in the nano-alumina suspension is 30nm. The concentration of the nano-alumina suspension is 8%. The pH of the nano-alumina suspension is 6.5. The pH is adjusted by adding dilute hydrochloric acid. Ultrasonic stirring is performed during the soaking process. The ultrasonic frequency is 50kHz. After taking out and drying, the modified nylon 510 fiber is obtained.

[0088] S2: soaking nylon 66 fiber in nano-silica suspension for 2 hours, the fineness of nylon 66 fiber is 60D, stretching the nylon 66 fiber during soaking, the stretching ratio is 1:1.2, the stretching direction is consistent with the axial direction of nylon 66 fiber, the diameter of nano-silica particles in the nano-silica suspension is 10nm, the concentration of the nano-silica suspension is 4%, and the preparation process of the nano-silica suspension is as follows: adding nano-silica powder and polyacetal oligomer to 20% methanol aqueous solution, stirring for 30 minutes, obtaining nano-silica suspension, the concentration of polyacetal oligomer in the nano-silica suspension is 2%, and the molecular weight of the polyacetal oligomer is 10k, taking out and drying to obtain modified nylon 66 fiber;

[0089] S3: using the modified nylon 66 fiber in S2 as the warp and the modified nylon 510 fiber in S1 as the weft for weaving, the weaving pattern is a twill pattern, the twill pattern is a 2 / 1 twill, the warp density and the weft density are 45 strands / 10cm and 70 strands / 10cm respectively, to obtain a modified nylon fabric;

[0090] S4: The modified nylon fabric in S4 is first soaked in acid red dye No. 37 for 3 hours and then taken out and dried. The soaking temperature is 50°C and the concentration of the acid dye is 1%. It is then soaked in reactive yellow dye No. 147 for 2 hours. The concentration of the reactive dye is 3%. The pH of reactive yellow dye No. 147 is 8-9 and the soaking temperature is 90°C. After taking out and drying, the printing and dyeing process of the modified nylon fabric is completed.

[0091] Embodiment 9

[0092] A printing and dyeing method for nylon fabrics comprises the following steps:

[0093] S1: Soak the nylon 510 fiber in the nano-alumina suspension for 1 hour. The fineness of the nylon 510 fiber is 10D. The nylon 510 fiber is treated with plasma. The diameter of the nano-alumina particles in the nano-alumina suspension is 30nm. The concentration of the nano-alumina suspension is 8%. The pH of the nano-alumina suspension is 6.5. The pH is adjusted by adding dilute hydrochloric acid. Ultrasonic stirring is performed during the soaking process. The ultrasonic frequency is 50kHz. After taking out and drying, the modified nylon 510 fiber is obtained.

[0094] S2: soaking nylon 66 fiber in nano-silica suspension for 2 hours, the fineness of nylon 66 fiber is 60D, stretching the nylon 66 fiber during soaking, the stretching ratio is 1:1.2, the stretching direction is consistent with the axial direction of nylon 66 fiber, the diameter of nano-silica particles in the nano-silica suspension is 10nm, the concentration of the nano-silica suspension is 4%, and the preparation process of the nano-silica suspension is as follows: adding nano-silica powder and polyacetal oligomer to 20% methanol aqueous solution, stirring for 30 minutes, obtaining nano-silica suspension, the concentration of polyacetal oligomer in the nano-silica suspension is 2%, and the molecular weight of the polyacetal oligomer is 10k, taking out and drying to obtain modified nylon 66 fiber;

[0095] S3: using the modified nylon 66 fiber in S2 as the warp and the modified nylon 510 fiber in S1 as the weft for weaving, the weaving pattern is a twill pattern, the twill pattern is a 2 / 1 twill, the warp density and the weft density are 45 strands / 10cm and 70 strands / 10cm respectively, to obtain a modified nylon fabric;

[0096] S4: The modified nylon fabric in S4 is first soaked in acid red dye No. 37 for 3 hours and then taken out and dried. The soaking temperature is 50°C and the concentration of the acid dye is 1%. It is then soaked in reactive yellow dye No. 147 for 2 hours. The concentration of the reactive dye is 3%. The pH of reactive yellow dye No. 147 is 8-9 and the soaking temperature is 95°C. After taking out and drying, the printing and dyeing process of the modified nylon fabric is completed.

[0097] Samples of the same mass as those of Examples 1 to 9 and Comparative Example 1 were taken to conduct color fastness and dye uptake tests. The experimental results are shown in Table 1.

[0098] Table 1 Color fastness rating and dye uptake data of samples in Examples 1 to 9 and Comparative Example 1

[0099]

[0100]

[0101] It can be seen from Table 1 that the color fastness ratings and dye uptake rates in Examples 1 to 9 and Comparative Example 1 are greater than the color fastness rating and dye uptake rate in Comparative Example 1, and the printing and dyeing method for nylon fabrics of the present application is superior.

[0102] In the first to fifth embodiments, as the temperature increases during acid dye printing, the color fastness rating and dye uptake first increase and then decrease, because at a lower temperature, the combination of dye molecules and fibers may not be sufficient, resulting in lower color fastness. As the temperature rises, the kinetic energy of the dye molecules increases, the combination with the fibers is more sufficient, the hydrogen bonds between the fibers are opened, the pores increase, thereby improving the color fastness and dye uptake, but too high a temperature may cause the dye to thermally migrate, that is, the dye molecules migrate from the inside of the fiber to the surface of the fiber, resulting in a decrease in color fastness and dye uptake. The preferred embodiment is embodiment three.

[0103] In Example 3 and Examples 6 to 9, as the temperature increases during printing and dyeing with reactive dyes, the color fastness rating and dye uptake first increase and then decrease, because increasing the temperature can increase the combination of reactive dyes and fibers, because the increase in temperature helps the diffusion of dye molecules and the expansion of fibers, thereby increasing the reaction opportunities between dyes and fibers, increasing the combination of chemical bonds, and improving the color fixation rate and dye uptake, but too high a temperature will lead to a hydrolysis reaction, which is a process in which a dye reacts with water to generate a hydrolyzed dye, which will reduce the amount of dye that forms a covalent bond with the fiber, thereby reducing the color fastness and dye uptake. The preferred embodiment is Example 7.

[0104] The above is based on the ideal embodiment of the present invention. Through the above description, relevant personnel can make various changes and modifications without departing from the technical concept of the present invention. The technical scope of the present invention is not limited to the content in the specification, and the technical scope must be determined according to the scope of the claims.

Claims

1. A printing and dyeing method for nylon fabric, characterized in that: The following steps are involved: S1: Soaking nylon 510 fiber in nano-alumina suspension for 1-2 hours, taking it out and drying it to obtain modified nylon 510 fiber; S2: Soaking nylon 66 fiber in nano-silicon dioxide suspension for 2-4 hours, taking it out and drying it to obtain modified nylon 66 fiber; S3: using the modified nylon 66 fiber in S2 as a warp and the modified nylon 510 fiber in S1 as a weft for weaving, the weaving pattern is a twill pattern, to obtain a modified nylon fabric; S4: soaking the modified nylon fabric in S4 in an acid dye for 3-4 hours, taking it out and drying it, and then soaking it in a reactive dye for 2-3 hours, wherein the pH of the reactive dye is 8-9, and taking it out and drying it to complete the printing and dyeing process of the modified nylon fabric.

2. The printing and dyeing method for nylon fabric according to claim 1, characterized in that: The diameter of the nano-alumina particles in the nano-alumina suspension in S1 is 20-40 nm, and the concentration of the nano-alumina suspension is 5%-10%.

3. The printing and dyeing method for nylon fabric according to claim 1, characterized in that: The pH of the nano-alumina suspension in S1 is 6-7, and the pH is adjusted by adding dilute hydrochloric acid. Ultrasonic stirring is performed during the immersion process, and the ultrasonic frequency is 40-60 kHz.

4. The printing and dyeing method for nylon fabric according to claim 1, characterized in that: The nylon 510 fiber in S1 has a fineness of 10-20D, and the nylon 510 fiber is plasma treated.

5. The printing and dyeing method for nylon fabric according to claim 1, characterized in that: The diameter of the nano-silicon dioxide particles in the nano-silicon dioxide suspension in S2 is 10-20 nm, and the concentration of the nano-silicon dioxide suspension is 3%-5%.

6. A printing and dyeing method for nylon fabric according to claim 5, characterized in that: The preparation process of the nano-silicon dioxide suspension is as follows: adding nano-silicon dioxide powder and polyacetal oligomer into a 15-20% methanol aqueous solution, stirring for 20-30 minutes to obtain the nano-silicon dioxide suspension, wherein the concentration of the polyacetal oligomer in the nano-silicon dioxide suspension is 1-2%, and the molecular weight of the polyacetal oligomer is 5k-10k.

7. The printing and dyeing method for nylon fabric according to claim 1, characterized in that: The fineness of the nylon 66 fiber in S2 is 50-70D. The nylon 66 fiber is stretched during the soaking process, with a stretching ratio of 1:1.2-1.5, and the stretching direction is consistent with the axial direction of the nylon 66 fiber.

8. The printing and dyeing method for nylon fabric according to claim 1, characterized in that: The twill pattern in S3 is 2 / 1 twill, and the warp density and weft density are 45-50 strands / 10cm and 60-70 strands / 10cm respectively.

9. The printing and dyeing method for nylon fabric according to claim 1, characterized in that: The acid dye in S4 is one of acid red No. 37 and acid blue No. 25, and the concentration of the acid dye is 1-1.5%. The reactive dye is one of reactive yellow No. 147 and reactive black No. 5, and the concentration of the reactive dye is 2-3%.

10. A printing and dyeing method for nylon fabric according to claim 1, characterized in that: The temperature at which the modified nylon fabric described in S4 is immersed in acid dye is 40-60°C, and the temperature at which it is immersed in reactive dye is 80-90°C.

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