Method for manufacturing multi-performance fabric and curtain fabric

Abstract

The present invention relates to the technical field of textile, and discloses a method for manufacturing a multi-functional fabric and a curtain fabric, which includes preparing composite fibers, where the composite fibers include a flame-retardant skin layer and a light-shielding core layer; spinning the composite fibers into yarns; weaving the yarns into a base fabric; infiltrating a phosphorus-based flame retardant into the interior of the base fabric based on the padding method to obtain a padded fabric, and measuring the concentration of the flame retardant on the surface of the padded fabric; performing plasma cleaning on the padded fabric, and coating a nano-TiO2 light-shielding agent layer on the surface of the cleaned padded fabric based on the coating method to obtain a multi-functional fabric; wherein, the addition amount of the TiO2 light-shielding agent in the coating method is adjusted according to the concentration of the flame retardant on the surface of the padded fabric. The method for manufacturing a multi-functional fabric and the curtain fabric according to the present invention can stably improve the peeling strength of the light-shielding layer of the fabric, and at the same time meet the requirements of the flame retardancy and light-shielding property of the fabric.

Description

Technical Field

[0001] The invention relates to the technical field of textiles, in particular to a method for manufacturing a multi-performance fabric and a curtain fabric. Background Art

[0002] Functional curtain fabrics are widely used in public areas such as hotels and theaters that have high requirements for safety and privacy, and are required to meet strict flame retardant and light-shielding properties. However, in the production process of this functional composite fabric, there is always a technical bottleneck that is difficult to coordinately optimize flame retardant and light-shielding properties. The root cause lies in the interface compatibility between flame retardants and light-shielding coatings.

[0003] The traditional process uses post-finishing to apply flame retardants to the fabric surface. In high temperature and high humidity environments, flame retardants are prone to migration and precipitation, seriously affecting the adhesion of subsequent light-shielding coatings. Test data show that fabrics manufactured using traditional processes are used as curtain fabrics, and the peel strength of their light-shielding coatings is often lower than 3N / cm. Quality problems such as light-shielding coating shedding and cracking are prone to occur during use. Summary of the invention

[0004] To this end, the purpose of the present invention is to overcome the difficulty of fabrics manufactured in the prior art in meeting both flame retardancy and light-shielding requirements, and to provide a multi-performance fabric manufacturing method and curtain fabric to stably improve the peeling strength of the fabric light-shielding layer while meeting the fabric flame retardancy and light-shielding requirements.

[0005] In a first aspect, in order to solve the above technical problems, the present invention provides a method for manufacturing a multi-performance fabric, comprising:

[0006] preparing a composite fiber, the composite fiber comprising a flame retardant skin layer and a light-shielding core layer;

[0007] Spinning the composite fiber into yarn;

[0008] weaving the yarn into a base fabric;

[0009] Infiltrating the phosphorus-based flame retardant into the base fabric based on a padding method to obtain a padded fabric, and measuring the flame retardant concentration on the surface of the padded fabric;

[0010] Plasma cleaning the padded fabric, and coating the surface of the padded fabric after cleaning with a nano-TiO2 sunscreen layer based on a coating method to obtain a multi-performance fabric;

[0011] Among them, the amount of TiO2 sunscreen added in the coating method is adjusted according to the flame retardant concentration on the surface of the impregnated fabric, which includes: if the flame retardant concentration on the surface of the impregnated fabric is greater than the first target concentration, reducing the amount of TiO2 sunscreen added; if the flame retardant concentration on the surface of the impregnated fabric is less than the first target concentration, increasing the amount of TiO2 sunscreen added.

[0012] In one embodiment of the present invention, the addition amount of the TiO2 light-shielding agent in the coating method is adjusted based on the following method:

[0013] ;

[0014] C represents the actual addition amount of the TiO2 light-shielding agent; C0 represents the reference addition amount of the TiO2 light-shielding agent, and its value ranges from 9.8 to 10.5 g / L; K represents the first adjustment coefficient; R represents the measured value of the concentration of the flame retardant on the surface of the pad-dyed fabric; represents the first target concentration.

[0015] In one embodiment of the present invention, the first adjustment coefficient K is related to the metric count S of the yarn and satisfies the following relationship:

[0016] ;

[0017] represents the reference adjustment coefficient, taking values from 0.21 to 0.24 g / (L·%); represents the reference metric count, taking values from 38 to 42 m / g.

[0018] In one embodiment of the present invention, the manufacturing method further includes detecting the concentration of the flame retardant on the surface of the yarn and adjusting the addition amount of the phosphorus-based flame retardant in the pad-dyeing method according to the concentration of the flame retardant on the surface of the yarn; wherein, if the concentration of the flame retardant on the surface of the yarn is greater than the second target concentration, the addition amount of the phosphorus-based flame retardant is reduced; if the concentration of the flame retardant on the surface of the pad-dyed fabric is less than the second target concentration, the addition amount of the phosphorus-based flame retardant is increased.

[0019] In one embodiment of the present invention, the addition amount of the phosphorus-based flame retardant in the pad-dyeing method is adjusted based on the following method:

[0020] ;

[0021] wherein, C FR represents the addition amount of the phosphorus-based flame retardant; C FR 0 represents the reference addition amount of the phosphorus-based flame retardant, taking values from 17.4 to 18.6 g / L; represents the second adjustment coefficient; R FR represents the measured value of the concentration of the flame retardant on the surface of the yarn; represents the second target concentration.

[0022] In an embodiment of the present invention, it further includes adjusting the spinning speed and weaving density according to the concentration of the flame retardant on the surface of the yarn; wherein, if the concentration of the flame retardant on the surface of the yarn is greater than the second target concentration, the spinning speed is increased and the weaving density is decreased; if the concentration of the flame retardant on the surface of the yarn is less than the second target concentration, the spinning speed is decreased and the weaving density is increased.

[0023] In an embodiment of the present invention, the light-shielding core layer contains 8%-10% by mass of nano carbon black, the particle size of the nano carbon black is 30-50 nm, and a dispersed phase with an average spacing less than or equal to 150 nm is formed in the PET matrix.

[0024] In an embodiment of the present invention, the skin-core ratio of the flame-retardant skin layer to the light-shielding core layer is (2.5~3.5):1.

[0025] In an embodiment of the present invention, the base fabric is a double-layer fabric, the surface layer of the double-layer fabric is twill, and the inner layer is satin.

[0026] In a second aspect, to solve the above technical problems, the present invention also provides a curtain fabric, which is prepared according to the multi-performance fabric manufacturing method described above.

[0027] The above technical solutions of the present invention have the following beneficial effects compared with the prior art:

[0028] The multi-performance fabric manufacturing method and curtain fabric of the present invention, through the synergistic effect of skin-core composite fibers, process optimization and intelligent control, stably improve the peeling strength of the light-shielding layer of the fabric, and at the same time meet the requirements of fabric flame retardancy and light-shielding performance.

[0029] Among them, the composite fiber structure of the flame-retardant skin layer + light-shielding core layer physically isolates the flame-retardant element and the light-shielding element, reduces the direct contact between the flame retardant and the light-shielding agent in the subsequent dyeing and finishing process from the source, blocks the migration of the flame retardant to the fiber surface, avoids the formation of a weak interface layer, and reduces the interference of flame retardancy and light-shielding performance.

[0030] Adjust the addition amount of TiO2 light-shielding agent in the coating method according to the concentration of the flame retardant on the surface of the impregnated fabric. When the concentration of the flame retardant is high, reduce the addition amount of TiO2 light-shielding agent, reduce the interfacial incompatibility caused by the enrichment of the flame retardant, and at the same time avoid the stress concentration caused by the accumulation of TiO2 light-shielding agent at the weak interface, thereby improving the peeling strength of the light-shielding layer and solving the problems of peeling and cracking of the light-shielding coating. When the concentration of the flame retardant is low, increase the addition amount of TiO2 light-shielding agent, compensate for the possible decrease in light-shielding efficiency caused by the insufficient flame retardant, and at the same time enhance the binding force of TiO2 by means of the active surface after plasma treatment, also improve the peeling strength of the light-shielding layer, and improve the light-shielding rate. Description of the Drawings

[0031] To make the content of the present invention easier to be clearly understood, the following further elaborates on the present invention according to specific embodiments of the present invention and in combination with the accompanying drawings. Among them,

[0032] Figure 1 is a flowchart of a method for manufacturing a multi-performance fabric in a preferred embodiment of the present invention;

[0033] Figure 2 is a flowchart for adjusting the addition amount of a phosphorus-based flame retardant in the padding method in a preferred embodiment of the present invention. Specific Embodiments

[0034] The following further illustrates the present invention in combination with the accompanying drawings and specific embodiments, so that those skilled in the art can better understand the present invention and be able to implement it. However, the embodiments cited do not limit the present invention.

[0035] The purpose of the embodiments of the present invention is to solve the problems of the decrease in the peel strength of the light-shielding layer caused by the weakening of the interface due to the surface enrichment of the flame retardant, and the industry pain point problem that it is difficult to synergistically optimize the flame retardant and light-shielding properties of the fabric.

[0036] The inventors of the present application continuously studied and found that the reason why it is difficult to synergistically optimize the flame retardant and light-shielding properties of the fabric is as follows: The commonly used PVC light-shielding coating is flammable. In order to make up for the flammability of the light-shielding coating, it is necessary to additionally increase the addition amount of the flame retardant. However, an excessive amount of the flame retardant will reduce the adhesion of the light-shielding coating and the hand feeling of the fabric, manifested as the migration or precipitation of the flame retardant on the fabric surface for enrichment, resulting in uneven surface concentration, forming a weak interface layer, causing the adhesion of the light-shielding coating to decrease, and reducing the quality and stability of the light-shielding coating. Specifically manifested as: Excessive flame retardant particles (particle size 1 - 5 μm) will damage the continuity of the light-shielding coating. SEM (Scanning Electron Microscopy) observation shows that when the flame retardant content > 13 wt% (mass percentage concentration 13%), obvious cracks appear in the light-shielding coating (the crack density increases by 320%); Chemical competition: The phosphorus-based flame retardant competes with the surface hydroxyl groups for binding sites. XPS (X-ray Photoelectron Spectroscopy) analysis shows that for every 1 wt% increase in the flame retardant concentration, the intensity of the Ti 2p characteristic peak decreases by 18% (Ti 2p is an important spectral peak used in XPS analysis to analyze the chemical state of titanium Ti elements).

[0037] The function of the flame retardant is to improve the fire resistance of the fabric and prevent the fabric from burning rapidly in a fire. Usually, the flame retardant forms a protective film on the surface or inside the fibers of the fabric, which can effectively delay the speed of flame spread. The function of the light-blocking agent is to form a dense covering layer on the surface of the fabric to block or reflect light and achieve the effect of light blocking. The performance of the light-blocking agent is closely related to its adhesion. If there is too much flame retardant or the concentration of the flame retardant is uneven on the fabric surface, it will lead to a decrease in the adhesion of the light-blocking agent coating, thus affecting the light-blocking effect and peel strength.

[0038] Example 1: Refer to Figure 1 As shown, to solve the above problems, an embodiment of the present invention discloses a method for manufacturing a multi-functional fabric, including,

[0039] S10. Prepare composite fibers, where the composite fibers include a flame-retardant skin layer and a light-blocking core layer;

[0040] S20. Spin the composite fibers into yarns;

[0041] S30. Weave the yarns into a basic fabric;

[0042] S40. Based on the padding method, infiltrate a phosphorus-based flame retardant into the basic fabric to obtain a padded fabric, and measure the concentration of the flame retardant on the surface of the padded fabric;

[0043] S50. Plasma clean the padded fabric, and coat a nano-TiO2 light-blocking agent layer on the surface of the cleaned padded fabric based on the coating method to obtain a multi-functional fabric;

[0044] Among them, the addition amount of the TiO2 light-blocking agent in the coating method is adjusted according to the concentration of the flame retardant on the surface of the padded fabric, which includes: if the concentration of the flame retardant on the surface of the padded fabric is greater than the first target concentration, reduce the addition amount of the TiO2 light-blocking agent; if the concentration of the flame retardant on the surface of the padded fabric is less than the first target concentration, increase the addition amount of the TiO2 light-blocking agent.

[0045] The method for manufacturing a multi-functional fabric and the curtain fabric according to the present invention can stably improve the peel strength of the light-blocking layer of the fabric through the synergistic effect of the core-shell composite fiber, process optimization, and intelligent control, while meeting the requirements of fabric flame retardancy and light-blocking property.

[0046] In a specific application scenario, a phosphorus-based flame retardant is blended with PET chips to obtain a flame retardant masterbatch with a limiting oxygen index (LOI) ≥ 28%; nano carbon black is blended with PET chips to obtain a light-shielding masterbatch with a light transmittance < 3%; a composite fiber is prepared by simultaneously spinning a flame retardant skin layer and a light-shielding core layer through a core-shell composite spinning device. The composite fiber structure of the flame retardant skin layer + light-shielding core layer physically isolates the flame retardant elements and light-shielding elements, blocking the migration or precipitation of the flame retardant to the fiber surface from the source, avoiding the formation of a weak interface layer, and reducing the interference of flame retardant and light-shielding properties. In addition, the composite fiber structure of the flame retardant skin layer + light-shielding core layer reduces the amount of flame retardant used in subsequent dyeing and finishing processes.

[0047] Among them, nano carbon black improves flame retardancy through a dual mechanism: (1) during combustion, carbon black promotes the formation of a dense carbon layer, the porosity decreases, and the residual carbon content increases to form heat insulation and flame retardancy; (2) nano carbon black reduces the thermal diffusivity, increasing the ignition temperature from 320 °C to 415 °C to form thermal conduction inhibition, completely avoiding the flammability problem of traditional coatings.

[0048] Specifically, the light-shielding core layer contains 8% - 10% by mass of nano carbon black, the particle size of the nano carbon black is 30 - 50 nm, and a dispersed phase with an average spacing less than or equal to 150 nm is formed in the PET matrix. Nano carbon black achieves efficient light shielding through multiple scattering and absorption effects. The particle size of 30 - 50 nm is close to 1 / 10 of the visible light wavelength, resulting in significant Rayleigh scattering, and the scattering cross-section of a single particle reaches (at a wavelength of 550 nm). Transmission electron microscopy shows that when the carbon black content is 8% and the average spacing is 142 nm, the light shielding rate is 99.3%; when the carbon black content is 10% and the average spacing is 118 nm, the light shielding rate is 99.6%; this is due to: the extinction coefficient of carbon black is as high as 8.7 m² / g, controlling the dispersed phase spacing ≤ 150 nm, ensuring that photons experience more than 66 times of scattering in a 10 μm path.

[0049] Based on this, the preferred light-shielding core layer material of the embodiment of the present invention completely avoids the flammability problem of traditional coatings, does not increase the burden of the flame retardant (the oxygen index of the core layer is equivalent to that of pure PET), has a significant light shielding rate advantage, and at the same time maintains the mechanical properties of the fiber.

[0050] Furthermore, the skin-core ratio of the flame retardant skin layer and the light-shielding core layer is (2.5 - 3.5):1. A skin-core ratio of 2.5:1 - 3.5:1 can form a continuous and complete flame retardant barrier layer (the measured minimum effective thickness is 12 μm), and at the same time ensure that the light transmittance is less than 4% when the mass percentage concentration of nano carbon black is greater than or equal to 15%. Among them, when the skin-core ratio is less than 2.5:1, the skin layer is too thin, resulting in insufficient flame retardant loading and the leakage of carbon black from the core layer; when the skin-core ratio is greater than 3.5:1, the light shielding efficiency of the core layer decreases and the fiber rigidity increases.

[0051] The prepared composite fibers are spun into yarns. In this process, methods such as ring spinning and air-jet spinning are used for spinning to make the physical structure of the fibers stable and have sufficient strength. The spinning speed is controlled and the concentration of the flame retardant on the surface of the yarn is measured to provide basic data for subsequent closed-loop control.

[0052] The spun yarns are woven into a basic fabric using standard weaving techniques. Different weaving methods can be selected, such as plain weave and twill weave, to control the density, thickness, and surface characteristics of the fabric to ensure that the fabric does not deform or damage during subsequent processing. Among them, in the preferred embodiment of the present invention, the basic fabric is a double-layer fabric. The surface layer of the double-layer fabric is twill, and the inner layer is satin. Twill can improve the overall flame retardancy of the fabric, and satin enhances the light-shielding property of the fabric: The yarn arrangement of the twill fabric gives it a certain diagonal structure, increasing the tightness and strength of the fabric, helping to form a more uniform and firm surface, and effectively reducing the penetration of flames or high-temperature air currents into the fabric. In addition, due to the good density and strength of the twill, when exposed to a high-temperature environment, it can effectively inhibit the spread of combustion and improve the overall flame retardant performance of the fabric. The surface of the satin structure is smooth and dense, enabling the fabric to effectively block the penetration of ultraviolet and visible light, enhancing the overall light-shielding performance of the fabric. Especially after coating with nano-TiO2 light-shielding agent, the satin structure provides a smooth surface for the light-shielding agent, further enhancing the light-shielding effect.

[0053] In addition, the double-layer fabric also enhances the overall structural stability of the fabric, enabling it to maintain its flame retardant and light-shielding functions even after multiple uses or exposure to harsh environments. Even after long-term wear or washing, the flame retardant and light-shielding properties of the fabric can still be well maintained.

[0054] The phosphorus-based flame retardant is infiltrated into the interior of the basic fabric by the padding method. In this step, the basic fabric is immersed in a solution containing the phosphorus-based flame retardant, and the flame retardant is uniformly infiltrated into the fabric fibers by means of roller pressing. Subsequently, the concentration of the flame retardant on the surface of the padded fabric is measured to determine the penetration effect of the flame retardant. Among them, the padding method can ensure that the flame retardant is evenly infiltrated into the fibers of the basic fabric, covering the entire structure of the fabric. Compared with the spraying or coating method, the padding method can better control the penetration depth of the flame retardant and ensure that the fabric is not easily lose its flame retardant effect during multiple washings or uses.

[0055] The basic fabric obtained by padding is subjected to plasma cleaning treatment to remove impurities on the fabric surface, improve the surface properties of the fabric, and increase the adhesion of the coating. Then, a layer of nano-TiO2 light-shielding agent is coated on the cleaned fabric surface based on the coating method. Nano-TiO2 can effectively absorb ultraviolet light, increase the light-shielding performance of the fabric, and has certain antibacterial and self-cleaning functions.

[0056] The addition amount of TiO2 light-shielding agent is closely related to the concentration of the flame retardant on the surface of the pad-dyed fabric. Specifically, the addition amount of TiO2 light-shielding agent in the coating method is adjusted according to the concentration of the flame retardant on the surface of the pad-dyed fabric, which includes that if the concentration of the flame retardant on the surface of the pad-dyed fabric is greater than the first target concentration, the addition amount of TiO2 light-shielding agent is reduced; if the concentration of the flame retardant on the surface of the pad-dyed fabric is less than the first target concentration, the addition amount of TiO2 light-shielding agent is increased. It should be noted here that the addition amount of TiO2 light-shielding agent is the actual mass concentration (g / L) of TiO2 light-shielding agent in the finishing liquid per unit volume.

[0057] The core mechanism for adjusting the addition amount of TiO2 light-shielding agent lies in that after padding, the concentration of the phosphorus-based flame retardant on the fabric surface is high, and the enrichment of the flame retardant will occupy the active sites (-OH, etc.) on the fiber surface, hindering the binding of TiO2; the flame retardant forms a physical barrier, destroying the continuity of the TiO2 coating. Through the reverse adjustment of the addition amount of TiO2, the total solid content balance is achieved, and the solid content of the finishing liquid is maintained at 23±2wt%.

[0058] Adjust the addition amount of TiO2 light-shielding agent in the coating method according to the concentration of the flame retardant on the surface of the pad-dyed fabric. When the concentration of the flame retardant is high, reduce the addition amount of TiO2 light-shielding agent to reduce the interfacial incompatibility caused by the enrichment of the flame retardant, and at the same time avoid the stress concentration caused by the accumulation of TiO2 light-shielding agent at the weak interface, thereby improving the peeling strength of the light-shielding layer and solving the problems of peeling and cracking of the light-shielding coating. When the concentration of the flame retardant is low, increase the addition amount of TiO2 light-shielding agent to compensate for the possible decrease in light-shielding efficiency caused by the insufficient flame retardant, and at the same time enhance the binding force of TiO2 by means of the active surface after plasma treatment, also improving the peeling strength of the light-shielding layer and the light-shielding rate.

[0059] In addition, adjust the addition amount of TiO2 light-shielding agent in the coating method according to the concentration of the flame retardant on the surface of the pad-dyed fabric. First, control the total solid content below the critical value to avoid cracks caused by excessive accumulation of the coating; second, give priority to ensuring the effective attachment of the flame retardant; third, by reducing the addition amount, increase the surface tension of the finishing liquid from 42 mN / m to 46 mN / m, significantly improving its wettability to the fiber. On the contrary, when the flame retardant is insufficient, increase which not only compensates for the light-shielding property, but also utilizes the scattering effect of its nanoparticles (30-50 nm) to enhance the apparent flame retardant performance. The cone calorimeter test shows that the peak value of the heat release rate is reduced by 18%.

[0060] Specifically, adjust the addition amount of TiO2 light-shielding agent in the coating method based on the following methods:

[0061] ;

[0062] C represents the actual addition amount of the TiO2 sunscreen agent; C0 represents the reference addition amount of the TiO2 sunscreen agent, with a value range of 9.8 - 10.5 g / L; K represents the first adjustment coefficient; R represents the measured value of the flame retardant concentration on the surface of the pad-dyed fabric (mass percentage concentration); represents the first target concentration.

[0063] In specific application scenarios, the percentage concentration of the flame retardant on the pad-dyed surface can be detected based on infrared spectroscopy. The first target concentration is set based on the following multi-dimensional optimization: Performance balance point: Determine the Pareto optimal solution of the flame retardancy (LOI) and coating adhesion (Adhesion) through experiments. Process stability: The migration rate of the flame retardant is the lowest at this concentration (<±5% fluctuation in surface P content after 50 washes).

[0064] Specifically, it can be determined through the following steps:

[0065] ① Prepare a flame retardant concentration gradient sample (10 - 15 wt%);

[0066] ② Test the limiting oxygen index LOI and adhesion of each sample;

[0067] ③ Select the lowest concentration value with LOI≥30% and adhesion≥9.5 N / cm.

[0068] For example, the mass percentage concentration of the first target concentration is determined to be 12.5±0.5%.

[0069] Furthermore, the first adjustment coefficient K is related to the metric count S of the yarn and satisfies the following relationship:

[0070] ;

[0071] represents the reference adjustment coefficient, with a value range of 0.21 - 0.24 g / (L·%); represents the reference metric count, with a value range of 38 - 42 m / g.

[0072] In specific application scenarios, the metric count S of the yarn is an index characterizing the fineness of the yarn, defined as the number of meters of a 1-gram yarn. The larger the metric count, the finer the yarn; conversely, the smaller the metric count, the coarser the yarn. In the embodiments of the present invention, the first adjustment coefficient K is associated with the metric count S of the yarn, that is, associated with the fineness of the yarn: fine yarns (high metric count S) have a larger specific surface area, a higher surface coverage rate of the flame retardant per unit mass of fiber, and the flame retardant is more likely to be surface-enriched, so the addition amount of the TiO2 opacifier is reduced. Conversely, for thick yarns, the addition amount of the TiO2 opacifier is increased. By correcting the first adjustment coefficient K with the metric count of the yarn, on the one hand, the fine yarn itself has a higher light-shielding efficiency, and on the other hand, while reducing the addition amount of the TiO2 opacifier for the fine yarn, the optimized distribution of the flame retardant and the light-shielding coating is achieved by utilizing its higher specific surface area characteristics.

[0073] As a further improvement of the embodiments of the present invention, referring to Figure 2 as shown, the manufacturing method further includes detecting the concentration of the flame retardant on the surface of the yarn and adjusting the addition amount of the phosphorus-based flame retardant in the padding method according to the concentration of the flame retardant on the surface of the yarn; wherein, if the concentration of the flame retardant on the surface of the yarn is greater than the second target concentration, the addition amount of the phosphorus-based flame retardant is reduced; if the concentration of the flame retardant on the surface of the padded fabric is less than the second target concentration, the addition amount of the phosphorus-based flame retardant is increased.

[0074] In specific application scenarios, a near-infrared spectrometer is installed at the spinning outlet to measure the concentration of the flame retardant on the surface of the yarn in real time. According to the measured concentration of the flame retardant on the surface of the yarn, the second target concentration is set, and the feedback adjustment of the addition amount of the phosphorus-based flame retardant in the padding method is carried out by comparing the measurement results. The concentration of the flame retardant on the surface of the yarn directly reflects the potential migration risk of the flame retardant. By pre-adjusting the addition amount of the flame retardant in the padding stage according to the concentration of the flame retardant on the surface of the yarn, if the concentration of the flame retardant on the surface of the yarn is greater than the second target concentration, it indicates that the migration risk of the flame retardant in the base fabric is relatively large, and the addition amount of the phosphorus-based flame retardant in the padding method is reduced. By reducing the addition amount of the flame retardant, the gradient driving force of the flame retardant inside the fiber is reduced, and the subsequent migration amount is reduced, leaving more binding sites for the TiO2 coating; conversely, if the concentration of the flame retardant on the surface of the padded fabric is less than the second target concentration, it indicates that the concentration of the flame retardant in the yarn is lower than the target, and the addition amount of the phosphorus-based flame retardant in the padding method is increased to compensate for the loss of the flame retardant. By increasing the addition amount of the flame retardant, the capillary effect is enhanced to maintain the balance of the flame retardant / light-shielding performance. It should be noted that: the addition amount of the phosphorus-based flame retardant refers to the mass concentration (g / L) of the phosphorus-based flame retardant in the padding finishing solution.

[0075] The embodiments of the present invention form a two - level feedback control of primary regulation + secondary feedback prediction, specifically: primary prediction: adjusting the addition amount of the phosphorus - based flame retardant in the padding method according to the concentration of the flame retardant on the yarn surface; secondary regulation: adjusting the addition amount of the TiO2 opacifier in the coating method according to the concentration of the flame retardant on the surface of the padded fabric. Overall, a forward - adjustment path and a reverse - compensation path are formed:

[0076] Forward - adjustment path: When the concentration of the flame retardant on the yarn surface is greater than the second target concentration, the addition amount of the padding flame retardant is reduced through primary control, and the addition amount of the TiO2 opacifier is reduced in advance through secondary prediction.

[0077] Reverse - compensation path: When the concentration of the flame retardant on the surface of the padded fabric is less than the first target concentration, the addition amount of the TiO2 opacifier is increased through secondary control; the padding concentration of the next batch is increased through primary feedback.

[0078] Through the synergistic effect of the two - level feedback control, the bottleneck of the mutual exclusion of the double properties of fabric light - shielding and flame - retardancy is broken through. Finally, the surface concentration of the flame retardant is stable, and the coverage rate of the TiO2 light - shielding coating is increased.

[0079] Among them, the detection method of the concentration of the flame retardant on the yarn surface is the same as that of the padded fabric surface; the setting method and determination method of the second target concentration are the same as those of the above - mentioned first target concentration, which will not be elaborated here.

[0080] Specifically, the addition amount of the phosphorus - based flame retardant in the padding method is adjusted based on the following method:

[0081] ;

[0082] Among them, C FR represents the addition amount of the phosphorus - based flame retardant; C FR 0 represents the reference addition amount of the phosphorus - based flame retardant, taking 17.4 - 18.6 g / L; represents the second adjustment coefficient, with a value of 0.5 - 0.7 g / (L·%); R FR represents the measured value of the concentration of the flame retardant on the yarn surface; represents the second target concentration.

[0083] Furthermore, the manufacturing method further includes adjusting the spinning speed and weaving density according to the concentration of the flame retardant on the yarn surface; among them, if the concentration of the flame retardant on the yarn surface is greater than the second target concentration, the spinning speed is increased and the weaving density is reduced; if the concentration of the flame retardant on the yarn surface is less than the second target concentration, the spinning speed is reduced and the weaving density is increased.

[0084] In a specific application scenario, when the concentration of the flame retardant on the surface of the yarn is detected to be greater than the second target concentration, the spinning speed is increased and the weaving density is decreased simultaneously. The spinning speed is increased to reduce the amount of flame retardant adhered, and the weaving density is decreased to increase the permeability of the subsequent finishing liquid. When the concentration of the flame retardant on the surface of the yarn is detected to be less than the second target concentration, the spinning speed is decreased and the warp density of the fabric is increased simultaneously. The spinning speed is decreased to increase the penetration of the flame retardant, and the warp density of the fabric is increased to compensate for the flame retardant effect.

[0085] Embodiment 2: Having the same inventive concept as Embodiment 1, a curtain fabric obtained by the multi-performance fabric manufacturing method according to Embodiment 1 is provided.

[0086] The curtain fabric described in the embodiment of the present invention has the same technical effects as those in Embodiment 1, which will not be elaborated here.

[0087] In summary, for the multi-performance fabric manufacturing method and the curtain fabric described in the present invention, through the synergistic effect of the core-sheath composite fiber, process optimization and intelligent control, the peel strength of the light-shielding layer of the fabric is stably improved, while meeting the requirements of fabric flame retardancy and light-shielding property.

[0088] Those skilled in the art should understand that the embodiments of the present application can be provided as a method, a system, or a computer program product. Therefore, the present application can take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware aspects. Moreover, the present application can take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0089] The present application is described with reference to the flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or block in the flowchart and / or block diagram can be realized by computer program instructions, and the combination of processes and / or blocks in the flowchart and / or block diagram can also be realized by computer program instructions. These computer program instructions can be provided to the processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing devices to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing devices generate means for realizing the functions specified in Figure 1 one process or multiple processes and / or blocks Figure 1 one block or multiple blocks.

[0090] These computer program instructions can also be stored in a computer-readable memory that can direct a computer or other programmable data processing device to work in a specific manner, so that the instructions stored in the computer-readable memory generate a manufactured article including an instruction device, and the instruction device realizes the functions in the process Figure 1One process or multiple processes and / or boxes Figure 1 The functions specified in one box or multiple boxes.

[0091] These computer program instructions can also be loaded onto a computer or other programmable data processing device, so that a series of operation steps are executed on the computer or other programmable device to generate a computer-implemented process. Thus, the instructions executed on the computer or other programmable device provide steps for implementing the functions specified in Figure 1 One process or multiple processes and / or boxes Figure 1 The steps of the functions specified in one box or multiple boxes.

[0092] Obviously, the above embodiments are only examples for clear illustration and are not limitations on the implementation manners. For those of ordinary skill in the art, other different forms of changes or variations can be made based on the above description. It is not necessary and impossible to enumerate all the implementation manners here. And the obvious changes or variations derived therefrom are still within the protection scope of the present invention.

Claims

1. A method for manufacturing a multi-performance fabric, characterized in that: including, preparing composite fibers, the composite fibers including a flame-retardant skin layer and a light-shielding core layer; spinning the composite fibers into yarns, and weaving the yarns into a base fabric; penetrating a phosphorus-based flame retardant into the base fabric based on the padding method to obtain a padded fabric, and measuring the concentration of the flame retardant on the surface of the padded fabric; plasma-cleaning the padded fabric, and coating a nano-TiO₂ light-shielding agent layer on the surface of the cleaned padded fabric based on the coating method to obtain a multi-functional fabric; wherein, the addition amount of the TiO₂ light-shielding agent in the coating method is adjusted according to the concentration of the flame retardant on the surface of the padded fabric, which includes: if the concentration of the flame retardant on the surface of the padded fabric is greater than the first target concentration, the addition amount of the TiO₂ light-shielding agent is reduced; if the concentration of the flame retardant on the surface of the padded fabric is less than the first target concentration, the addition amount of the TiO₂ light-shielding agent is increased.

2. The method for manufacturing a multi-performance fabric according to claim 1, characterized in that: adjusting the addition amount of the TiO₂ light-shielding agent in the coating method based on the following method: ； C represents the actual addition amount of the TiO2 sunscreen agent; C0 represents the reference addition amount of the TiO2 sunscreen agent, with a value range of 9.8 - 10.5 g / L; K represents the first adjustment coefficient; R represents the measured value of the flame retardant concentration on the surface of the padded fabric; represents the first target concentration.

3. The method for manufacturing a multi-performance fabric according to claim 2, characterized in that: the first adjustment coefficient K is related to the metric count S of the yarn and satisfies the following relationship: ； It represents the reference adjustment coefficient, taking a value of 0.21 - 0.24 g / (L·%); It represents the reference metric count, taking a value of 38 - 42 m / g.

4. The manufacturing method of the multi-performance fabric according to any one of claims 1-3, characterized in that: the manufacturing method further includes detecting the concentration of the flame retardant on the surface of the yarn, and adjusting the addition amount of the phosphorus-based flame retardant in the padding method according to the concentration of the flame retardant on the surface of the yarn; wherein, if the concentration of the flame retardant on the surface of the yarn is greater than the second target concentration, the addition amount of the phosphorus-based flame retardant is reduced; if the concentration of the flame retardant on the surface of the padded fabric is less than the second target concentration, the addition amount of the phosphorus-based flame retardant is increased.

5. The manufacturing method of the multi-property fabric according to claim 4, characterized in that: adjusting the addition amount of the phosphorus-based flame retardant in the padding method based on the following method: ； Among them, C FR represents the addition amount of the phosphorus-based flame retardant; C FR 0 represents the reference addition amount of the phosphorus-based flame retardant, taking 17.4 - 18.6 g / L; represents the second adjustment coefficient, with a value of 0.5 - 0.7 g / (L·%); R FR represents the measured value of the flame retardant concentration on the surface of the yarn; represents the second target concentration.

6. The manufacturing method of the multi-performance fabric according to claim 4, characterized in that: further includes adjusting the spinning speed and the weaving density according to the concentration of the flame retardant on the surface of the yarn; wherein, if the concentration of the flame retardant on the surface of the yarn is greater than the second target concentration, the spinning speed is increased and the weaving density is decreased; if the concentration of the flame retardant on the surface of the yarn is less than the second target concentration, the spinning speed is decreased and the weaving density is increased.

7. The manufacturing method of the multi-performance fabric according to claim 1, characterized in that: the light-shielding core layer contains 8%-10% by mass of nano carbon black, the particle size of the nano carbon black is 30-50 nm, and a dispersed phase with an average spacing less than or equal to 150 nm is formed in the PET matrix.

8. The method for manufacturing a multi-functional fabric according to claim 1 or 7, characterized in that: the skin-core ratio of the flame-retardant skin layer and the light-shielding core layer is (2.5~3.5):

1.

9. The method for manufacturing a multi-functional fabric according to claim 1, characterized in that: the base fabric is a double-layer fabric, the surface layer of the double-layer fabric is twill, and the inner layer is satin.

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