Preparation process of warp-knitted jacquard vamp using pearly-luster yarn

Abstract

The invention relates to a textile shoe material, in particular to a preparation process of a warp knitting jacquard vamp using pearly-luster yarn, which comprises the following steps: 1, raw material selection and preparation: selecting the pearly-luster yarn as a main raw material, uniformly dispersing a functional coating on the surface of the pearly-luster yarn through a coating process, meanwhile, preparing TPEE fold-resistant yarns, polyester FDY yarns and polyester DTY yarns as auxiliary raw materials; 2, warp knitting: adopting a double-jacquard warp knitting machine, taking the pearly yarns as main decorative yarns, taking the TPEE folding-resistant yarns as reinforcing yarns, taking the main decorative yarns, the TPEE folding-resistant yarns, the terylene FDY yarns and the terylene DTY yarns as ground weave yarns, and fusing the pearly yarns into a ground weave in a weft insertion or yarn pressing manner; and 3, after-finishing and shaping: pre-shaping and dehydrating the woven gray fabric, and adopting a finished product shaping process. The technical problems that in the prior art, when the pearly yarn is applied to warp knitting jacquard vamps, the three-dimensional performance, stability and comprehensive performance are poor are solved.

Description

Technical Field

[0001] The present invention relates to textile shoe materials, and in particular to a preparation process for warp knitted jacquard shoe uppers using pearlescent yarns. Background Art

[0002] In the field of textile shoe materials, especially in the preparation process of warp knitted jacquard shoe uppers, there are extremely high requirements for the gloss, dimensional stability, and physical properties of the fabric. Traditional shoe upper materials often have difficulty meeting these requirements simultaneously, restricting the design and manufacture of high-end shoe models. As a yarn material with a unique gloss effect, pearlescent yarns have gradually gained popularity in the field of textile shoe materials in recent years. For example, a light-emitting shoe upper product, its preparation method, and its application disclosed in Chinese Patent Publication No.: CN109288189A, the light-emitting shoe upper product has a light-emitting shoe upper layer formed by electric embroidery; the light-emitting shoe upper layer has no electric embroidery base; the yarn used for electric embroidery includes several light guide yarns wrapped with transparent filaments. In the present invention, the light guide yarns with transparent filaments wound around are electrically embroidered on the surface of the shoe upper, with a stronger light-emitting effect and better folding resistance. At the same time, the electrically embroidered light-emitting shoe upper layer of the present invention performs excellently in terms of breathability, supportability, etc. Among them, the present invention preferably uses jacquard mesh cloth, etc. as the base, making the electrically embroidered shoe upper more comfortable to contact with the foot.

[0003] However, how to effectively apply pearlescent yarns to the preparation of warp knitted jacquard shoe uppers, especially during warp knitting, how to form a three-dimensional and stable shoe upper while ensuring the comprehensive performance of the shoe upper has become an urgent problem to be solved. Summary of the Invention

[0004] Therefore, in view of the above problems, the present invention proposes a preparation process for warp knitted jacquard shoe uppers using pearlescent yarns, which solves the technical problems of poor three-dimensionality, poor stability, and poor comprehensive performance when pearlescent yarns are applied to warp knitted jacquard shoe uppers in the prior art.

[0005] To achieve the above object, the present invention adopts the following technical solutions: A preparation process for warp knitted jacquard shoe uppers using pearlescent yarns, comprising the following steps:

[0006] The first step, raw material selection and preparation: Select pearlescent yarns as the main raw material, the basic yarn material of the pearlescent yarns is polyester, and functional coatings are evenly dispersed on the surface of the pearlescent yarns through a coating process. At the same time, prepare TPEE folding-resistant filaments, polyester FDY yarns, and polyester DTY yarns as auxiliary raw materials;

[0007] Step 2: Warp knitting: Using a double jacquard warp knitting machine, the pearlescent yarn is used as the main decorative yarn, and jacquard combs are used to perform jacquard knitting with a set pattern. The TPEE fold-resistant yarn is used as the reinforcing yarn, and together with the polyester FDY yarn and the polyester DTY yarn, they are used as the ground tissue yarns and are knitted through the ground combs. The pearlescent yarn is incorporated into the ground tissue in the form of weft insertion or yarn pressing;

[0008] Step 3: Post-treatment and shaping: The woven grey fabric is pre-shaped and dehydrated, and a finished product shaping process is adopted to ensure that the fabric has good dimensional stability and physical properties while maintaining the luster effect.

[0009] Furthermore, in Step 2, the density of the pearlescent yarn is 50D - 80D, and the elastic modulus is 2GPa - 5GPa; the linear density of the TPEE fold-resistant silk thread is 100D - 150D, and the elastic modulus is 8GPa - 12GPa; the linear density of the polyester FDY yarn is 75D - 100D, and the elastic modulus is 6GPa - 8GPa; the linear density of the polyester DTY yarn is 50D - 75D, and the elastic modulus is 3GPa - 5GPa.

[0010] Furthermore, in Step 1, the functional coating is a composite coating of titanium dioxide and alumina, which includes 6 - 8 parts of titanium dioxide and 2 - 4 parts of alumina by weight to improve the wear resistance of the coating.

[0011] Furthermore, in Step 3, the post-treatment includes the following steps:

[0012] A. Preshrinking and relaxation: Pass the grey fabric through a high-temperature steam preshrinking machine with a steam temperature of 120 - 130°C, a humidity of 80 - 85%, and a vehicle speed of 13 - 15 m / min for two cycles of treatment to eliminate the internal stress during weaving, make the width shrinkage rate stable at 3.2 - 3.8%, and reduce the subsequent shaping deformation;

[0013] B. Degreasing and decontamination: Use a composite cleaning solution of bio-enzyme + non-ionic surfactant with a pH value of 7.5 - 8.0 and a temperature of 50 - 55°C to remove the weaving oil agent through a flat-width washing machine to avoid the formation of yellow spots due to the carbonization of oil stains during shaping;

[0014] C. Three-proof finishing: Apply the finishing solution to the fabric through a double-dip and double-roll process, control the pick-up rate to be 75 - 80%, and perform high-temperature baking at 160 - 180°C for 80 - 100 seconds to achieve good waterproof, oil-proof, and stain-proof effects;

[0015] D. Antibacterial and antistatic. Under an argon atmosphere, the fabric surface is treated by low-temperature plasma at a power of 250 - 350 W for a treatment time of 30 - 120 seconds, and then spray treatment is carried out with a composite finishing solution containing nano silver ions and nano zinc oxide. The content of nano silver ions calculated as silver element is 600 - 1000 ppm, the particle size of nano zinc oxide is 10 - 50 nm, and the spraying amount is 50 - 150 mL / m 2 , after spraying, it is dried at 80 - 120 °C for 3 - 10 minutes to make the finishing agent fully combine with the fabric surface.

[0016] Further, the finishing solution includes the following substances in parts by weight: 50 - 70 parts of C6 waterproof agent, 15 - 25 parts of hydrophilic silicone, and 3 - 8 parts of crosslinking agent.

[0017] Further, in the third step, during the final setting of the finished product, a high-temperature hot air setting process is adopted.

[0018] Further, the final setting of the finished product is achieved by using an eight-section box-type setting machine. The temperature zones of the eight-section box-type setting machine are divided into eight, specifically:

[0019] The first zone is used to achieve preheating and moisture balance, activate fiber activity, uniformly diffuse moisture, eliminate static electricity and internal stress, with a temperature of 110 - 120 °C, a wind speed of 0.8 m / s, and a humidity of 25 - 30%;

[0020] The second zone is used to achieve molecular chain deorientation, soften the fiber, release warp knitting stress, and avoid embrittlement, with a temperature of 140 - 150 °C, a wind speed of 1.2 m / s, and a humidity of 15 - 20%;

[0021] The third zone is used to achieve main setting and crystallization strengthening, rearrange molecular chains at high temperature, improve crystallinity, and strengthen coating bonding, with a temperature of 165 - 170 °C, a wind speed of 1.5 m / s, and a humidity of 8 - 12%;

[0022] The fourth zone is used to achieve stress release and size locking, relax the fabric, eliminate residual stress, and solidify the size, with a temperature of 160 - 165 °C, a wind speed of 1.2 m / s, and a humidity of 15 - 20%;

[0023] The fifth zone is used to achieve size stabilization treatment, perfect crystallization under quasi-static conditions, and stabilize the water washing shrinkage rate, with a temperature of 155 - 160 °C, a wind speed of 1.0 m / s, and a humidity of 15 - 20%;

[0024] The sixth zone is used to achieve gradient cooling setting, slowly cool down, avoid grain refinement, and reduce brittleness, with a temperature of 145 - 150 °C, a wind speed of 0.8 m / s, and a humidity of 15 - 20%;

[0025] The seventh zone is used to achieve humidity gradient regulation. The medium-humidity environment inhibits static electricity and improves the hand feeling. The temperature is 130 - 135 °C, the wind speed is 0.8 m / s, and the humidity is 20 - 25%.

[0026] The eighth zone is used to achieve static cooling and stress dissipation. It is naturally cooled to eliminate vertical tension and dissipate residual stress. The temperature is room temperature or 25 ± 2 °C, with natural wind, and the humidity is the environmental humidity.

[0027] Furthermore, an ultrasonic humidification system is set in the first zone or the seventh zone.

[0028] Furthermore, the working frequency of the ultrasonic humidification system in the first zone is 40 kHz ± 5%, and the output fog particle diameter is 5 μm ± 1 μm, which promotes the disentanglement of molecular chain segments and improves the efficiency of internal stress release.

[0029] Furthermore, for the ultrasonic humidification system in the seventh zone, the working frequency is 40 kHz ± 5%, and the output fog particle diameter is 0.3 - 0.5 μm. The fog particles form a continuous hydrated layer of 0.3 - 0.5 μm on the fiber surface, reducing the surface resistivity and the static electricity elimination rate is greater than 90%.

[0030] By adopting the foregoing technical solutions, the beneficial effects of the present invention are as follows:

[0031] 1. By selecting pearlescent yarn as the main raw material and combining specific warp knitting and post-finishing and shaping technologies, this process successfully prepares a warp-knitted Jacquard shoe upper with a unique gloss effect, good dimensional stability, and physical properties. This not only improves the aesthetics of the shoe upper but also enhances its practicality and durability, meeting the high requirements of high-end shoe models for fabric performance.

[0032] 2. Defining the linear density and elastic modulus ranges of pearlescent yarn, TPEE fold-resistant yarn, polyester FDY yarn, and polyester DTY yarn ensures the quality and performance consistency of the raw materials, provides a stable basis for subsequent warp knitting and post-finishing processes, and helps improve the quality stability of the final product.

[0033] 3. By coating a composite coating of titanium dioxide and alumina, the wear resistance of the pearlescent yarn surface is significantly improved. This improvement extends the service life of the shoe upper, reduces the gloss loss and appearance deterioration caused by wear, and improves the market competitiveness of the product.

[0034] 4. Pre-shrinking and Relaxing: Through high-temperature steam pre-shrinking treatment, the weaving internal stress is effectively eliminated, the width shrinkage rate is stabilized, and the deformation risk during the subsequent shaping process is reduced. Degreasing and Stain Removal: A composite cleaning solution of bio-enzyme + non-ionic surfactant is used to efficiently remove the weaving oil agent, avoiding the formation of yellow spots due to carbonization of oil stains during shaping, and ensuring the cleanliness and aesthetics of the shoe upper. Three-proof Finishing: The finishing solution is applied through a double-dip and double-roll process to achieve good waterproof, oil-proof, and stain-proof effects on the fabric, enhancing the practicality and ease of handling of the shoe upper. Antibacterial and Antistatic: Low-temperature plasma treatment and spraying treatment with a composite finishing solution containing nano-silver ions and nano-zinc oxide are used to endow the shoe upper with excellent antibacterial and antistatic properties, improving the wearing comfort and safety.

[0035] 5. The finishing solution is compounded with a specific proportion of C6 waterproof agent, hydrophilic silicone, and cross-linking agent, which not only ensures the waterproof, oil-proof, and stain-proof effects, but also improves the hand feeling and breathability of the fabric, enhancing the wearing experience.

[0036] 6. The high-temperature hot air shaping process, combined with the coordinated control of temperature, wind speed, and humidity of the eight-section box-type shaping machine, enables the fabric to have good dimensional stability and physical properties while maintaining the gloss effect. This process improves the shaping efficiency and product quality, and reduces the production cost.

[0037] 7. By accurately setting the temperature, wind speed, and humidity parameters in each area, the gradual optimization and stability of the fabric during the shaping process are achieved. This control strategy effectively improves the crystallinity, dimensional stability, and physical properties of the fabric, while reducing energy consumption and emissions, meeting the requirements of green production. Moreover, each area can be precisely regulated through the program to optimize the shaping effect.

[0038] 8. An ultrasonic humidification system is set in the first area and the seventh area. The tiny fog particles generated by high-frequency vibration uniformly penetrate into the fiber interior to achieve precise humidity control. This design significantly improves the internal stress release efficiency and static electricity elimination rate, and improves the hand feeling and appearance quality of the fabric. By setting the working frequency of 40 kHz and the output fog particle diameter of 5 μm, the disentanglement of fiber molecular chain segments and the release of internal stress are promoted, effectively improving the softness and elastic recovery rate of the fabric, and reducing the wrinkles and deformation after shaping. In the seventh area, a fog particle diameter of 0.3 - 0.5 μm is used to form a continuous hydration layer on the fiber surface, significantly reducing the surface resistivity and eliminating the static electricity accumulation. This improvement effectively reduces the dust adsorption and pilling phenomena of the fabric during subsequent processing and use, and improves the cleanliness and aesthetics of the product. Specific Embodiment

[0039] The present invention will be further described in conjunction with specific embodiments.

[0040] This embodiment provides a preparation process for a warp-knitted Jacquard shoe upper using pearlescent yarn, including the following steps:

[0041] First step, raw material selection and preparation: Select pearlescent yarn as the main raw material. The basic yarn material of the pearlescent yarn is polyester. The functional coating is evenly dispersed on the surface of the pearlescent yarn through a coating process. At the same time, prepare TPEE flex-resistant yarn, polyester FDY yarn, and polyester DTY yarn as auxiliary raw materials;

[0042] Second step, warp knitting: Use a double Jacquard warp knitting machine. Take the pearlescent yarn as the main decorative yarn, and carry out jacquard knitting with a set pattern through the Jacquard comb. The TPEE flex-resistant yarn is used as the reinforcing yarn, and together with the polyester FDY yarn and polyester DTY yarn as the ground tissue yarns, and are knitted through the ground comb. The pearlescent yarn is incorporated into the ground tissue in the form of weft insertion or yarn pressing;

[0043] Third step, post-treatment and shaping: Perform pre-shaping and dehydration treatment on the woven grey fabric, and adopt a finished product shaping process to ensure that the fabric has good dimensional stability and physical properties while maintaining the luster effect.

[0044] The above pattern can be set according to actual needs. The above knitting structure can be set according to actual needs. In this solution, the most important thing is to evenly disperse the functional coating on the surface of the pearlescent yarn through a coating process, and the TPEE flex-resistant yarn is used as the reinforcing yarn, and together with the polyester FDY yarn and polyester DTY yarn as the ground tissue yarns, and are knitted through the ground comb. The pearlescent yarn is incorporated into the ground tissue in the form of weft insertion or yarn pressing.

[0045] In the first step, the functional coating is a titanium dioxide and aluminum oxide composite coating, including 6-8 parts by weight of titanium dioxide and 2-4 parts by weight of aluminum oxide to improve the wear resistance of the coating.

[0046] In the second step, the linear density of the pearlescent yarn is 50D-80D, and the elastic modulus is 2GPa-5GPa; the linear density of the TPEE flex-resistant yarn is 100D-150D, and the elastic modulus is 8GPa-12GPa; the linear density of the polyester FDY yarn is 75D-100D, and the elastic modulus is 6GPa-8GPa; the linear density of the polyester DTY yarn is 50D-75D, and the elastic modulus is 3GPa-5GPa.

[0047] In the third step, it includes the following steps:

[0048] A. Pre-shrinking and relaxation, pass the grey fabric through a high-temperature steam pre-shrinking machine, with the steam temperature of 120-130°C, humidity of 80-85%, and vehicle speed of 13-15m / min, and perform two cycles of treatment to eliminate the internal stress in weaving, make the width shrinkage rate stable at 3.2-3.8%, and reduce the subsequent shaping deformation;

[0049] B. Degreasing and stain removal: Use a composite cleaning solution of bio-enzyme + non-ionic surfactant with a pH value of 7.5 - 8.0 and a temperature of 50 - 55°C. Remove the weaving oil agent through a flat-width washing machine to avoid the carbonization of oil stains during setting and the formation of yellow spots.

[0050] C. Three-proof finishing: Apply the finishing solution to the fabric through a double-dip and double-roll process, control the liquor pickup rate at 75 - 80%, and bake at a high temperature of 160 - 180°C for 80 - 100 seconds to achieve good waterproof, oil-proof, and stain-proof effects.

[0051] D. Antibacterial and antistatic treatment: Under an argon atmosphere, treat the fabric surface with low-temperature plasma at a power of 250 - 350W for 30 - 120 seconds. The gas atmosphere for the low-temperature plasma pretreatment is a mixture of argon and oxygen. For example, the volume ratio of argon to oxygen is 9:1 to 19:1 to enhance the surface active sites. Spray treatment is carried out with a composite finishing solution containing nano silver ions and nano zinc oxide. The content of nano silver ions calculated as silver element is 600 - 1000 ppm, the particle size of nano zinc oxide is 10 - 50 nm, and the spraying amount is 50 - 150 mL / m 2 , After spraying, dry at 80 - 120°C for 3 - 10 minutes to make the finishing agent fully combine with the fabric surface.

[0052] The finishing solution includes the following substances in parts by weight: 50 - 70 parts of C6 waterproof agent, 15 - 25 parts of hydrophilic silicone, and 3 - 8 parts of crosslinking agent. Preferably, the C6 waterproof agent is LG5320, which is a six-carbon fluorinated acrylic resin, the hydrophilic silicone is amino-modified silicone oil, and the crosslinking agent is RH-NB-SF11N, which is a polyurethane emulsion. The specific preparation steps can be referred to: Dilute the C6 waterproof agent LG5320 with an equal amount of water, then add the remaining water to adjust to the full volume, and stir until uniform. Slowly add the silicone oil for oil stain removal (such as amino-modified silicone oil), and continuously stir for 30 minutes until there is no stratification. Finally, add the crosslinking agent RH-NB-SF11N and stir for 15 minutes until the system is stable. The specific ratio can be referred to: C6 waterproof agent LG5320 (50 g / L) + amino-modified silicone oil (15 g / L) + crosslinking agent RH-NB-SF11N (5 g / L), or C6 waterproof agent LG5320 (60 g / L) + hydrophilic silicone KGF-9878 (20 g / L) + crosslinking agent RH-NB-SF11N (5 g / L).

[0053] Among them, steps A and B are the pretreatment stage, and steps C and D are the functional finishing stage.

[0054] In the third step, when the finished product is shaped, a high-temperature hot air shaping process is used. An eight-section box-type shaping machine is used to shape the finished product. The temperature zones of the eight-section box-type shaping machine are divided into eight, specifically:

[0055] The first zone is used to achieve preheating and moisture balance, activate fiber activity, evenly diffuse moisture, eliminate static electricity and internal stress, with a temperature of 110-120°C, a wind speed of 0.8m / s, and a humidity of 25-30%. The active groups on the fiber surface are activated by step-by-step heating, and a 25-30% relative humidity environment is used to promote the migration of moisture from the grey cloth to the surface, eliminating the accumulation of static charge and internal stress generated during the weaving process;

[0056] The second zone is used to achieve molecular chain deorientation, soften the fiber, release the warp knitting stress, and avoid embrittlement. The temperature is 140-150℃, the wind speed is 1.2m / s, and the humidity is 15-20%. The temperature gradient is increased to 140-150℃, and the 1.2m / s medium-speed wind field is used to accelerate the movement of molecular chains, release the warp orientation stress accumulated during the warp knitting process, and prevent fiber embrittlement caused by a sudden temperature rise;

[0057] The third zone is used to achieve main shaping and crystallization strengthening, high temperature rearrangement of molecular chains, increase crystallinity, and strengthen coating bonding. The temperature is 165-170℃, the wind speed is 1.5m / s, and the humidity is 8-12%. Through the 1.5m / s strong convection wind field, the molecular chain segments are quickly rearranged, the crystallinity is improved, and the functional yarn coating and the substrate are cross-linked by covalent bonds;

[0058] The fourth zone is used to achieve stress release and size locking, relax the fabric, eliminate residual stress, and solidify the size. The temperature is 160-165℃, the wind speed is 1.2m / s, and the humidity is 15-20%. The temperature is adjusted back to 160-165℃ to maintain the residual heat required for the fiber crystallization to be perfected. With the 1.2m / s reversing wind field, the wind direction is switched every 30 seconds, so that the fabric can complete the microscopic rearrangement of the molecular chain segments in a relaxed state and eliminate the residual stress caused by the high temperature setting in the third zone;

[0059] The fifth zone is used to achieve dimensional stabilization treatment, perfect crystallization under quasi-static conditions, and stabilize water washing shrinkage, with a temperature of 155-160°C, a wind speed of 1.0m / s, and a humidity of 15-20%. At a temperature close to the perfect fiber crystallization temperature, the fabric is cured in dimensional memory under quasi-static conditions through a 1.0m / s low-turbulence wind field, ensuring that the subsequent water washing shrinkage is ≤0.8%;

[0060] The sixth zone is used to achieve gradient cooling and shaping, slow cooling, avoid grain refinement, and reduce brittleness. The temperature is 145-150℃, the wind speed is 0.8m / s, and the humidity is 15-20%. For example: the fabric is cooled at a rate of 0.8℃ / s to pass through the crystallization temperature range to avoid grain refinement and increased fabric brittleness caused by rapid cooling;

[0061] The seventh zone is used to achieve humidity gradient adjustment. The medium humidity environment suppresses static electricity and improves the hand feel. The temperature is 130-135℃, the wind speed is 0.8m / s, and the humidity is 20-25%. In the safe range of about 50℃ below the fiber Tg, through the 20-25%RH humidity environment, a hydration layer with a thickness of 0.3-0.5μm is formed on the fiber surface, which suppresses the re-accumulation of static electricity and improves the fabric feel;

[0062] The eighth zone is used to achieve static cooling and stress dissipation, natural cooling, elimination of vertical tension, dissipation of residual stress, room temperature or 25±2℃, natural wind, humidity environment humidity. For example: static cooling for 10 minutes through the natural wind channel, combined with the gravity cloth dropping device to eliminate the vertical tension difference of the fabric, so that the residual stress dissipation rate reaches about 92%.

[0063] In the above-mentioned partitions, power can be dynamically compensated and temperature can be compensated in real time, thus achieving coordinated control. The coordinated optimization of the three parameters of temperature, humidity and tension is achieved, reducing the fluctuation of fabric shrinkage from ±1.5% to ±0.6%. Through gradient heating technology, steam consumption is reduced by about 22% and comprehensive energy consumption is reduced by about 18%. The washing durability of the triple-proof finishing is increased to 50 times (30 times for traditional processes), and the antibacterial performance still maintains a bacteriostatic rate of >95% after 100 washes.

[0064] When controlling humidity, an ultrasonic humidification system is set in the first zone or the seventh zone. The working frequency of the ultrasonic humidification system in the first zone is 40kHz±5%, and the output mist particle diameter is 5μm±1μm, which promotes the disentanglement of molecular segments and improves the efficiency of internal stress release. The ultrasonic humidification system in the seventh zone has an operating frequency of 40kHz±5%, and the output mist particle diameter is 0.3-0.5μm. The mist particles form a 0.3-0.5μm continuous hydration layer on the fiber surface, which reduces the surface resistivity and the static elimination rate is greater than 90%.

[0065] For example, the performance quality of the product prepared by this process is as follows:

[0066] 1. Dimensional stability: After the product is washed 5 times, the width change rate is ±0.8% (industry standard ±2%), and the length change rate is ±0.5% (industry standard ±1.5%);

[0067] 2. Physical performance improvements are as follows:

[0068] Index Traditional process This solution Improvement rate Abrasion resistance revolutions 55000 72000 30.90％ Flex resistance at low temperature 95000 135000 42.10％ Bursting strength 1020 kPa 1180 kPa 15.70％ Crease recovery angle 235° 268° 14.00％

[0069] 3. Appearance quality: Detected by spectrophotometer, ΔE color difference value ≤0.8 (traditional process ≤1.5), gloss uniformity CV value ≤1.2% (traditional process ≤3.5%).

[0070] Although the present invention has been specifically shown and described with reference to preferred embodiments, those skilled in the art should understand that various changes in form and detail may be made to the present invention without departing from the spirit and scope of the present invention as defined by the appended claims, and all such changes are within the scope of protection of the present invention.

Claims

1. A preparation process for a warp knitted Jacquard shoe upper using pearlescent yarn, characterized in that, It includes the following steps: The first step, raw material selection and preparation: Select pearlescent yarn as the main raw material. The basic yarn material of the pearlescent yarn is polyester. The functional coating is evenly dispersed on the surface of the pearlescent yarn through a coating process. At the same time, prepare TPEE folding-resistant yarn, polyester FDY yarn and polyester DTY yarn as auxiliary raw materials; The second step, warp knitting: Use a double jacquard warp knitting machine. Take the pearlescent yarn as the main decorative yarn, and carry out jacquard knitting with a set pattern through the jacquard comb. The TPEE folding-resistant yarn is used as the reinforcing yarn, and together with the polyester FDY yarn and polyester DTY yarn as the ground tissue yarns, and are woven through the ground comb. The pearlescent yarn is incorporated into the ground tissue in the form of weft insertion or laying-in; The third step, post-finishing and shaping: Carry out pre-shaping and dehydration treatment on the woven grey cloth, and adopt the finished product shaping process to ensure that the fabric has good dimensional stability and physical properties while maintaining the luster effect.

2. The preparation process of a warp-knitted Jacquard upper using pearlescent yarn according to claim 1, characterized in that, In the second step, the linear density of the pearlescent yarn is 50D - 80D, and the elastic modulus is 2GPa - 5GPa; the linear density of the TPEE folding-resistant yarn is 100D - 150D, and the elastic modulus is 8GPa - 12GPa; the linear density of the polyester FDY yarn is 75D - 100D, and the elastic modulus is 6GPa - 8GPa; the linear density of the polyester DTY yarn is 50D - 75D, and the elastic modulus is 3GPa - 5GPa.

3. The preparation process of a warp knitted jacquard shoe upper using pearlescent yarn according to claim 1, characterized in that, In the first step, the functional coating is a composite coating of titanium dioxide and alumina, including 6 - 8 parts of titanium dioxide and 2 - 4 parts of alumina by weight to improve the wear resistance of the coating.

4. The preparation process of a warp-knitted Jacquard upper applying pearlescent yarn according to claim 1, characterized in that, In the third step, it includes the following steps: A. Pre-shrinking and relaxation, pass the grey cloth through a high-temperature steam pre-shrinking machine, with the steam temperature of 120 - 130 °C, the humidity of 80 - 85%, and the vehicle speed of 13 - 15 m / min, and carry out two cycles of treatment to eliminate the internal stress in weaving, make the width shrinkage rate stable at 3.2 - 3.8%, and reduce the subsequent shaping deformation; B. Degreasing and decontamination, adopt a composite cleaning solution of bio-enzyme + non-ionic surfactant, with a pH value of 7.5 - 8.0 and a temperature of 50 - 55 °C, and remove the weaving oil agent through a flat-width washing machine to avoid the formation of yellow spots due to the carbonization of oil stains during shaping; C. Three-proof finishing, apply the finishing solution to the fabric through a double-dip and double-roll process, control the liquor pickup rate at 75 - 80%, and bake at a high temperature of 160 - 180 °C for 80 - 100 seconds to achieve good waterproof, oil-proof and stain-proof effects; D. Antibacterial and antistatic. Under an argon atmosphere, the fabric surface is treated with low-temperature plasma at a power of 250 - 350 W for 30 - 120 seconds, and then spray-treated with a composite finishing solution containing nano silver ions and nano zinc oxide. The content of nano silver ions in terms of silver element is 600 - 1000 ppm, the particle size of nano zinc oxide is 10 - 50 nm, and the spraying volume is 50 - 150 mL / m 2 , after spraying, it is dried at 80 - 120 °C for 3 - 10 minutes to fully combine the finishing agent with the fabric surface.

5. The preparation process of a warp knitted jacquard shoe upper using pearlescent yarn according to claim 4, characterized in that, The finishing solution includes the following substances by weight: 50 - 70 parts of C6 waterproof agent, 15 - 25 parts of hydrophilic silicone and 3 - 8 parts of crosslinking agent.

6. The preparation process of a warp knitted Jacquard shoe upper using pearlescent yarn according to claim 1, characterized in that, In the third step, during the finished product shaping, adopt a high-temperature hot air shaping process.

7. The preparation process of a warp knitted Jacquard upper using pearlescent yarn according to claim 6, characterized in that, Use an eight-section box-type shaping machine to achieve the finished product shaping. The temperature zones of the eight-section box-type shaping machine are divided into eight, specifically: The first zone is used to achieve pre-heating and moisture balance, activate fiber activity, evenly diffuse moisture, eliminate static electricity and internal stress, with a temperature of 110 - 120 °C, a wind speed of 0.8 m / s, and a humidity of 25 - 30%; The second zone is used to achieve the disorientation of molecular chains, soften the fibers, release the warp knitting stress, and avoid embrittlement. The temperature is 140 - 150 °C, the wind speed is 1.2 m / s, and the humidity is 15 - 20%; The third zone is used to achieve main setting and crystallization strengthening, rearrange the molecular chains at high temperature, increase the crystallinity, and strengthen the coating bonding. The temperature is 165 - 170 °C, the wind speed is 1.5 m / s, and the humidity is 8 - 12%; The fourth zone is used to achieve stress release and size locking, relax the fabric, eliminate the residual stress, and solidify the size. The temperature is 160 - 165 °C, the wind speed is 1.2 m / s, and the humidity is 15 - 20%; The fifth zone is used to achieve size stabilization treatment, perfect crystallization under quasi-static conditions, and stabilize the washing shrinkage rate. The temperature is 155 - 160 °C, the wind speed is 1.0 m / s, and the humidity is 15 - 20%; The sixth zone is used to achieve gradient cooling setting, cool down slowly, avoid grain refinement, and reduce brittleness. The temperature is 145 - 150 °C, the wind speed is 0.8 m / s, and the humidity is 15 - 20%; The seventh zone is used to achieve humidity gradient adjustment. The medium humidity environment suppresses static electricity and improves the hand feeling. The temperature is 130 - 135 °C, the wind speed is 0.8 m / s, and the humidity is 20 - 25%; The eighth zone is used to achieve static cooling and stress dissipation, natural cooling, eliminate the vertical tension, and dissipate the residual stress. The temperature is room temperature or 25 ± 2 °C, natural wind, and the humidity is the environmental humidity.

8. The preparation process of a warp knitted Jacquard shoe upper using pearlescent yarn according to claim 7, characterized in that, An ultrasonic humidification system is set in the first zone or the seventh zone.

9. The preparation process of a warp knitted Jacquard shoe upper using pearlescent yarn according to claim 8, characterized in that, The working frequency of the ultrasonic humidification system in the first zone is 40 kHz ± 5%, and the output fog particle diameter is 5 μm ± 1 μm, which promotes the disentanglement of molecular chain segments and improves the internal stress release efficiency.

10. The preparation process of a warp knitted jacquard shoe upper using pearlescent yarn according to claim 8, characterized in that, The ultrasonic humidification system in the seventh zone has a working frequency of 40 kHz ± 5% and an output fog particle diameter of 0.3 - 0.5 μm. The fog particles form a continuous hydration layer with a thickness of 0.3 - 0.5 μm on the fiber surface, reducing the surface resistivity and the static electricity elimination rate is greater than 90%.