Preparation method of double-melting-point polyester fiber cleaning cloth

Abstract

The invention discloses a preparation method of double-melting-point polyester fiber cleaning cloth, and relates to the field of spinning. According to the method, two kinds of polyester fibers with different melting points are adopted, interface bonding force is enhanced through low-temperature plasma pretreatment, high-strength plied yarn is formed through staged twisting, and a three-dimensional friction layer structure is constructed by combining a special weaving technology. The friction layer vertical lines are fused and solidified into hard lumps through staged heat setting, and the mechanical property is optimized in cooperation with a staged dyeing and setting process. The friction coefficient of the prepared cloth reaches 0.84-0.87, the formaldehyde emission is lower than 0.03 mg / m, the friction attenuation rate is smaller than 8% after 1000 times of friction tests, and the cloth has excellent durability and safety.

Description

Technical Field

[0001] This invention belongs to the field of textiles, specifically relating to a method for preparing a cleaning fabric made of dual-melting-point polyester fiber. Background Technology

[0002] As people's demands for quality of home life increase, the performance and safety of everyday cleaning products have become a focus of attention. Home cleaning requires cleaning cloths with strong scraping power to remove stubborn stains, while avoiding damage to easily scratched surfaces such as non-stick pans and ceramics. They also need to meet the requirements of hygiene and durability. Among common cleaning tools, steel wool, although powerful, easily traps food scraps and sheds metal filaments, leaving residues after cleaning and potentially scratching hands and furniture surfaces. It also easily becomes greasy during use and is difficult to rinse thoroughly afterward. Traditional scouring pads, while having a large contact area and decent cleaning efficiency, have weak scraping power and are unable to handle stubborn stains, failing to meet diverse cleaning needs.

[0003] Currently, many multi-functional cleaning cloths on the market use resin to enhance surface friction. However, these resins often contain formaldehyde, vinyl alcohol, and heavy metals such as lead and cadmium. With prolonged use, these harmful substances may migrate to the hands or contaminate the objects being cleaned, increasing the metabolic burden on the liver and kidneys and even leading to chronic poisoning risks, thus compromising environmental friendliness and safety. More importantly, the resin softens easily at 100°C, causing a rapid decline in friction performance and making it impossible to maintain long-term effectiveness. This results in a short lifespan and fails to meet users' demands for durable cleaning cloths.

[0004] From the perspective of manufacturing process, the existing cleaning cloths have many shortcomings: the fiber raw material pretreatment method is simple and does not optimize for the surface characteristics of polyester fibers, resulting in weak inter-fiber bonding and easy breakage and fraying problems during subsequent filamentation and weaving; the twisting process mostly adopts single-step control, resulting in a loose ply structure and affecting the overall strength of the fabric; improper control of weaving tightness during weaving leads to poor stability of the friction layer structure, making it easy to deform during scraping; the setting treatment mostly uses single-stage temperature control, which cannot form a uniform and hard friction structure in the friction layer, resulting in unstable friction performance; the dyeing process lacks a pre-dyeing stage, which easily leads to uneven dyeing and low color fastness, and the setting does not distinguish between transverse and longitudinal parameters, resulting in poor fabric dimensional stability, easy shrinkage and deformation after washing, further affecting the cleaning effect. Summary of the Invention

[0005] In order to overcome the above-mentioned defects of the prior art, the embodiments of the present invention provide a method for preparing a cleaning cloth made of double-melting-point polyester fiber, which solves the problems of adding resin to cleaning cloth to improve friction performance, resulting in pollution of harmful substances and attenuation of friction performance at high temperature; simple fiber pretreatment leading to weak bonding force; single twisting process causing loose strands; easy shedding of friction layer; uneven dyeing; and poor dimensional stability.

[0006] To address the above problems, the present invention provides the following technical solution: A method for preparing a dual-melting-point polyester fiber cleaning fabric includes the following steps: S1. Two polyester fibers with different melting points were selected as raw materials, and the two polyester fibers were subjected to low-temperature plasma pretreatment respectively; S2. The two pretreated polyester fibers are drawn into filaments, and the two polyester fiber filaments are combined into a strand by a staged twisting method. First, coarse twisting is performed, and then fine twisting is performed. S3. A special weaving process is used to weave the ply yarn into a fabric blank. The fabric blank includes a base fabric and a friction layer. The friction layer is woven from ply yarn and has vertical lines inside. The vertical lines are arranged at intervals along the width of the fabric blank and intersect the warp of the base fabric at a specific angle. During the weaving process, the weaving compactness is controlled to make the fabric blank structure strong. S4. The fabric blank is subjected to a shaping and finishing process. During the shaping and finishing process, the processing temperature and relative humidity of the environment are controlled at the same time. First, the processing temperature is raised to the set high temperature range and kept warm, and then lowered to the set low temperature range and kept warm, so that the vertical lines in the friction layer melt and solidify into hard lumps. S5. The pre-dyed fabric body after the finishing process is first dyed, and then dyed with dye. S6. Perform segmented shaping on the dyed fabric blank, first performing transverse shaping and then longitudinal shaping to obtain cleaning fabric.

[0007] In the above-mentioned fabric preparation method, preferably, the low-temperature plasma pretreatment in step S1 uses argon as the treatment gas, with the plasma power controlled at 300-400W, the treatment time at 2-3 minutes, and the gas flow rate maintained at 10-15L / min during the treatment. Here, argon plasma activates the fiber surface, increasing the fiber specific surface area and active groups, enhancing the cohesion between fibers, and providing a structural basis for subsequent twisting and weaving. The parameter selection balances treatment efficiency and fiber damage control; the 300-400W power ensures appropriate surface etching, the 2-3 minute time avoids excessive oxidation, and the 10-15L / min gas flow rate maintains reaction uniformity.

[0008] In the preferred method for preparing the fabric described above, the twist of the coarse twisting process in step S2 is controlled at 60-80 twists / meter, and the coarse twisting speed is 200-250 rpm; the twist of the fine twisting process is controlled at 100-120 twists / meter, and the fine twisting speed is 250-300 rpm. This staged twisting process involves initially bundling the fibers with coarse twisting, and then increasing the density of the yarns with fine twisting to form a gradient structural strength. The parameters are matched to the fiber breaking elongation. The coarse twisting speed of 200-250 rpm prevents fiber breakage, while the fine twisting speed of 250-300 rpm optimizes the uniformity of the twist distribution.

[0009] In the preferred embodiment of the above-mentioned fabric preparation method, the vertical lines of the friction layer are spaced 2-3 mm apart in step S3, and the intersection angle between the vertical lines and the warp threads of the base fabric is 45-60°. This spacing and intersection angle create an asymmetrical mechanical support structure, increasing the range of contact stress distribution between the friction layer and the cleaning surface. The parameter design balances friction and fabric flexibility; too small a spacing can easily lead to stress concentration, and an angle deviation of 45-60° will reduce the shear resistance of the friction layer.

[0010] In the above-mentioned fabric preparation method, preferably, the special weaving process in step S3 is implemented using an air-jet loom. The weft insertion speed of the air-jet loom is 1050-1150 m / min, the shedding time is 285-295°, and the weaving tension is controlled at 160-190 N. This combination of high weft insertion speed and shedding time of the air-jet loom enables rapid interlacing and precise positioning of the yarns, and the weaving tension controls the uniformity of fabric density, avoiding localized collapse of the friction layer caused by differences in tension.

[0011] In the preferred method for preparing the fabric described above, the relative humidity of the environment during the shaping and finishing process in step S4 is controlled at 40-50%RH, the high-temperature section temperature is set at 205-210℃, and the holding time is 12-14 minutes; the low-temperature section temperature is set at 195-200℃, and the holding time is 6-7 minutes. Here, the high-temperature section softens and migrates the low-melting-point fibers, forming an interlocking structure with the high-melting-point fibers; the low-temperature section solidifies the cross-linked network; the parameter gradient design avoids excessive fiber shrinkage; the 12-14 minutes of high-temperature holding ensures sufficient melting; and the 6-7 minutes of low-temperature holding enhances structural stability.

[0012] In the above-described fabric preparation method, preferably, the finishing process in step S4 is carried out using a hot air setting machine. The hot air velocity of the hot air setting machine is controlled at 1.6-1.9 m / s, and the uniformity error of the hot air temperature does not exceed ±4℃. This high air velocity ensures uniform heat transfer, and the ±4℃ temperature uniformity error prevents fiber embrittlement caused by localized overheating. The parameters match the fabric's thermal conductivity characteristics, ensuring the consistency of the friction layer's bump structure dimensions.

[0013] In the preferred method for preparing the fabric described above, the pre-dyeing treatment in step S5 uses a diluted solution of disperse dye, with the pre-dyeing temperature controlled at 80-90℃ and the pre-dyeing time at 15-20 minutes. The amount of disperse dye in the diluted solution is 2-3% owf. During the formal dyeing, disperse dye is still used, with the dyeing temperature at 135-140℃, the dyeing time at 32-38 minutes, and the pH value of the dye solution at 4.8-5.2. This pre-dyeing allows the dye to initially penetrate the fiber surface, enabling deep color fixation during the formal dyeing process. The weakly acidic environment of pH 4.8-5.2 stabilizes the disperse dye molecules and avoids fiber hydrolysis caused by alkaline conditions.

[0014] In the preferred method of fabric preparation described above, after the formal dyeing in step S5, the fabric blank is washed with water at a temperature controlled at 42-48℃ for 16-18 minutes. A neutral detergent is added to the water during washing, with a dosage of 6-7 g / L. The water flow rate is controlled at 0.8-1.0 m / s. Here, the warm water gently removes floating dye, the 6-7 g / L neutral detergent balances detergency and fiber protection, and the 0.8-1.0 m / s water flow rate prevents excessive fabric deformation, ensuring colorfastness and dimensional stability.

[0015] In the preferred method for preparing the fabric described above, in step S6, the temperature for transverse setting is controlled at 160-165℃, the setting time is 5-6 minutes, and the transverse tensile rate is controlled at 1-2%; the temperature for longitudinal setting is controlled at 165-170℃, the setting time is 3-4 minutes, and the longitudinal tensile rate is controlled at 2-3%. Here, transverse setting limits weft shrinkage, longitudinal setting optimizes warp tensile strength, the 1-2% transverse tensile rate preserves the elasticity of the friction layer, and the 2-3% longitudinal tensile rate enhances tear resistance. These parameters synergistically improve the dimensional stability of the fabric.

[0016] The fabric preparation method of this invention is based on the physical phase change characteristics of fibers with different melting points. It optimizes the fiber arrangement density through staged twisting and weaving processes, and combines the dynamic balance of fiber melting and solidification during heat setting to form a gradient-distributed rigid support structure in the friction layer. By controlling the degree of fiber interface modification, the matching relationship between yarn mechanical property parameters and fabric structure, the synergistic improvement of friction performance and mechanical strength is achieved, ultimately obtaining a cleaning fabric that combines durable friction, structural stability, and environmental protection characteristics.

[0017] Compared with the prior art, the advantages of the present invention are as follows: (1) The present invention forms a self-reinforcing friction layer through a two-component fiber gradient melting technology, which can achieve durable friction without relying on an external coating; (2) The present invention optimizes the fiber arrangement density by combining the staged twisting and weaving process, which significantly improves the overall structural strength of the fabric; (3) The special weaving process of this invention, combined with heat setting parameter control, achieves precise control of the hardness of the friction layer; (4) The process of this invention is free of harmful chemical additives and eliminates the release of toxic substances such as formaldehyde, ensuring cleanliness and safety from the source. Attached Figure Description

[0018] Figure 1 This is a flowchart of a method for preparing a dual-melting-point polyester fiber cleaning fabric according to the present invention. Detailed Implementation

[0019] To facilitate understanding of the present invention, the invention will be described more fully and in detail below with reference to the accompanying drawings and preferred embodiments, but the scope of protection of the present invention is not limited to the following specific embodiments.

[0020] Unless otherwise defined, all technical terms used herein have the same meaning as commonly understood by those skilled in the art. The technical terms used herein are for the purpose of describing particular embodiments only and are not intended to limit the scope of the invention.

[0021] Unless otherwise specified, all raw materials, reagents, instruments and equipment used in this invention can be purchased from the market or prepared by existing methods.

[0022] Example 1 refer to Figure 1 The present invention discloses a method for preparing a dual-melting-point polyester fiber cleaning fabric, comprising the following steps: S1. High-melting-point polyester fiber PET and low-melting-point polyester fiber PBT were selected as raw materials with a mass ratio of 7:3. The two polyester fibers were subjected to low-temperature plasma pretreatment. Argon was used as the pretreatment gas, the plasma power was controlled at 350W, the treatment time was 2.5 minutes, and the gas flow rate was maintained at 12L / min during the treatment. S2. The two pretreated polyester fibers are drawn into filaments, and the two polyester fiber filaments are combined into a strand by a staged twisting method. First, coarse twisting is performed, and then fine twisting is performed. The twist of coarse twisting is controlled at 70 twists / meter and the coarse twisting speed is 225 rpm. The twist of fine twisting is controlled at 110 twists / meter and the fine twisting speed is 275 rpm. S3. The ply yarns are woven into a fabric blank using an air-jet loom. The fabric blank includes a base fabric and a friction layer. The friction layer is woven from ply yarns and has vertical lines inside. The vertical lines are arranged at intervals of 2.5 mm along the width of the fabric blank and cross the warp yarns of the base fabric at 60°. During the weaving process, the weaving tightness is controlled to make the fabric blank structure strong. The weft insertion speed of the air-jet loom is controlled at 1100 m / min, the shedding time is controlled at 290°, and the weaving tension is controlled at 175 N. S4. The fabric blank is subjected to a shaping and finishing process using a hot air shaping machine. The hot air velocity of the hot air shaping machine is controlled at 1.7 m / s, and the uniformity error of the hot air temperature does not exceed ±4℃. During the shaping and finishing process, the processing temperature and the relative humidity of the environment are controlled simultaneously. The relative humidity of the environment is controlled at 45%RH. First, the processing temperature is raised to 208℃ and kept for 13 minutes, and then lowered to 198℃ and kept for 6 minutes, so that the vertical lines in the friction layer melt and solidify into hard lumps. S5. The pre-dyed fabric body after finishing is first pre-dyed using a disperse dye dilution solution with a disperse dye dosage of 2.5% owf. The pre-dying temperature is controlled at 85℃ and the pre-dying time is 18 minutes. Then, the fabric body is formally dyed using disperse dye at a dyeing temperature of 138℃ for 35 minutes. The pH value of the dye solution is 5.0. After formal dyeing, the fabric body is washed with water at a temperature of 45℃ for 17 minutes. Neutral detergent is added to the water during washing at a dosage of 6.5 g / L. The water flow rate is controlled at 0.9 m / s during the washing process. S6. Perform segmented setting treatment on the dyed fabric blank, first perform transverse setting and then longitudinal setting. The temperature for transverse setting is controlled at 163℃, the setting time is 5.5 minutes, and the transverse tensile rate is controlled at 1.5%. The temperature for longitudinal setting is controlled at 168℃, the setting time is 3.5 minutes, and the longitudinal tensile rate is controlled at 2.5%, to obtain the cleaning fabric.

[0023] Example 2 The present invention discloses a method for preparing a dual-melting-point polyester fiber cleaning fabric, comprising the following steps: S1. High-melting-point polyester fiber PET and low-melting-point polyester fiber PBT were selected as raw materials with a mass ratio of 6:4. The two polyester fibers were subjected to low-temperature plasma pretreatment. Argon was used as the treatment gas for pretreatment. The plasma power was controlled at 350W and the treatment time was 2.5 minutes. The gas flow rate was maintained at 12L / min during the treatment. S2. The two pretreated polyester fibers are drawn into filaments, and the two polyester fiber filaments are combined into a strand by a staged twisting method. First, coarse twisting is performed, and then fine twisting is performed. The twist of coarse twisting is controlled at 70 twists / meter and the coarse twisting speed is 225 rpm. The twist of fine twisting is controlled at 110 twists / meter and the fine twisting speed is 275 rpm. S3. The ply yarns are woven into a fabric blank using an air-jet loom. The fabric blank includes a base fabric and a friction layer. The friction layer is woven from ply yarns and has vertical lines inside. The vertical lines are arranged at intervals of 2.5 mm along the width of the fabric blank and cross the warp yarns of the base fabric at 60°. During the weaving process, the weaving tightness is controlled to make the fabric blank structure strong. The weft insertion speed of the air-jet loom is controlled at 1100 m / min, the shedding time is controlled at 290°, and the weaving tension is controlled at 175 N. S4. The fabric blank is subjected to a shaping and finishing process using a hot air shaping machine. The hot air velocity of the hot air shaping machine is controlled at 1.7 m / s, and the uniformity error of the hot air temperature does not exceed ±4℃. During the shaping and finishing process, the processing temperature and the relative humidity of the environment are controlled simultaneously. The relative humidity of the environment is controlled at 45%RH. First, the processing temperature is raised to 208℃ and kept for 13 minutes, and then lowered to 198℃ and kept for 6 minutes, so that the vertical lines in the friction layer melt and solidify into hard lumps. S5. The pre-dyed fabric body after finishing is first pre-dyed using a disperse dye dilution solution with a disperse dye dosage of 2.5% owf. The pre-dying temperature is controlled at 85℃ and the pre-dying time is 18 minutes. Then, the fabric body is formally dyed using disperse dye at a dyeing temperature of 138℃ for 35 minutes. The pH value of the dye solution is 5.0. After formal dyeing, the fabric body is washed with water at a temperature of 45℃ for 17 minutes. Neutral detergent is added to the water during washing at a dosage of 6.5 g / L. The water flow rate is controlled at 0.9 m / s during the washing process. S6. Perform segmented setting treatment on the dyed fabric blank, first perform transverse setting and then longitudinal setting. The temperature for transverse setting is controlled at 163℃, the setting time is 5.5 minutes, and the transverse tensile rate is controlled at 1.5%. The temperature for longitudinal setting is controlled at 168℃, the setting time is 3.5 minutes, and the longitudinal tensile rate is controlled at 2.5%, to obtain the cleaning fabric.

[0024] Example 3 The present invention discloses a method for preparing a dual-melting-point polyester fiber cleaning fabric, comprising the following steps: S1. High-melting-point polyester fiber PET and low-melting-point polyester fiber PBT were selected as raw materials with a mass ratio of 7:3. The two polyester fibers were subjected to low-temperature plasma pretreatment. Argon was used as the pretreatment gas, the plasma power was controlled at 350W, the treatment time was 2.5 minutes, and the gas flow rate was maintained at 12L / min during the treatment. S2. The two pretreated polyester fibers are drawn into filaments, and the two polyester fiber filaments are combined into a strand by a staged twisting method. First, coarse twisting is performed, and then fine twisting is performed. The twist of coarse twisting is controlled at 70 twists / meter and the coarse twisting speed is 225 rpm. The twist of fine twisting is controlled at 110 twists / meter and the fine twisting speed is 275 rpm. S3. The ply yarns are woven into a fabric blank using an air-jet loom. The fabric blank includes a base fabric and a friction layer. The friction layer is woven from ply yarns and has vertical lines inside. The vertical lines are arranged at intervals of 2.5 mm along the width of the fabric blank and cross the warp yarns of the base fabric at 60°. During the weaving process, the weaving tightness is controlled to make the fabric blank structure strong. The weft insertion speed of the air-jet loom is controlled at 1100 m / min, the shedding time is controlled at 290°, and the weaving tension is controlled at 175 N. S4. The fabric blank is subjected to a shaping and finishing process using a hot air shaping machine. The hot air velocity of the hot air shaping machine is controlled at 1.7 m / s, and the uniformity error of the hot air temperature does not exceed ±4℃. During the shaping and finishing process, the processing temperature and the relative humidity of the environment are controlled simultaneously. The relative humidity of the environment is controlled at 45%RH. First, the processing temperature is raised to 205℃ and kept for 14 minutes, and then lowered to 200℃ and kept for 6 minutes, so that the vertical lines in the friction layer melt and solidify into hard lumps. S5. The pre-dyed fabric body after finishing is first pre-dyed using a disperse dye dilution solution with a disperse dye dosage of 2.5% owf. The pre-dying temperature is controlled at 85℃ and the pre-dying time is 18 minutes. Then, the fabric body is formally dyed using disperse dye at a dyeing temperature of 138℃ for 35 minutes. The pH value of the dye solution is 5.0. After formal dyeing, the fabric body is washed with water at a temperature of 45℃ for 17 minutes. Neutral detergent is added to the water during washing at a dosage of 6.5 g / L. The water flow rate is controlled at 0.9 m / s during the washing process. S6. Perform segmented setting treatment on the dyed fabric blank, first perform transverse setting and then longitudinal setting. The temperature for transverse setting is controlled at 163℃, the setting time is 5.5 minutes, and the transverse tensile rate is controlled at 1.5%. The temperature for longitudinal setting is controlled at 168℃, the setting time is 3.5 minutes, and the longitudinal tensile rate is controlled at 2.5%, to obtain the cleaning fabric.

[0025] Example 4 The present invention discloses a method for preparing a dual-melting-point polyester fiber cleaning fabric, comprising the following steps: S1. High-melting-point polyester fiber PET and low-melting-point polyester fiber PBT were selected as raw materials with a mass ratio of 7:3. The two polyester fibers were subjected to low-temperature plasma pretreatment. Argon was used as the pretreatment gas, the plasma power was controlled at 350W, the treatment time was 2.5 minutes, and the gas flow rate was maintained at 12L / min during the treatment. S2. The two pretreated polyester fibers are drawn into filaments, and the two polyester fiber filaments are combined into a strand by a staged twisting method. First, coarse twisting is performed, and then fine twisting is performed. The twist of coarse twisting is controlled at 70 twists / meter and the coarse twisting speed is 225 rpm. The twist of fine twisting is controlled at 110 twists / meter and the fine twisting speed is 275 rpm. S3. The ply yarns are woven into a fabric blank using an air-jet loom. The fabric blank includes a base fabric and a friction layer. The friction layer is woven from ply yarns and has vertical lines inside. The vertical lines are arranged at intervals of 2.5 mm along the width of the fabric blank and cross the warp yarns of the base fabric at 60°. During the weaving process, the weaving tightness is controlled to make the fabric blank structure strong. The weft insertion speed of the air-jet loom is controlled at 1100 m / min, the shedding time is controlled at 290°, and the weaving tension is controlled at 175 N. S4. The fabric blank is subjected to a shaping and finishing process using a hot air shaping machine. The hot air velocity of the hot air shaping machine is controlled at 1.7 m / s, and the uniformity error of the hot air temperature does not exceed ±4℃. During the shaping and finishing process, the processing temperature and the relative humidity of the environment are controlled simultaneously. The relative humidity of the environment is controlled at 45%RH. First, the processing temperature is raised to 208℃ and kept for 13 minutes, and then lowered to 198℃ and kept for 6 minutes, so that the vertical lines in the friction layer melt and solidify into hard lumps. S5. The pre-dyed fabric body after finishing is first pre-dyed using a disperse dye dilution solution with a disperse dye dosage of 2.5% owf. The pre-dying temperature is controlled at 85℃ and the pre-dying time is 18 minutes. Then, the fabric body is formally dyed using disperse dye at a dyeing temperature of 140℃ for 32 minutes. The pH value of the dye solution is 4.8. After formal dyeing, the fabric body is washed with water at a temperature of 45℃ for 17 minutes. Neutral detergent is added to the water during washing at a dosage of 6.5 g / L. The water flow rate is controlled at 0.9 m / s during the washing process. S6. Perform segmented setting treatment on the dyed fabric blank, first perform transverse setting and then longitudinal setting. The temperature for transverse setting is controlled at 163℃, the setting time is 5.5 minutes, and the transverse tensile rate is controlled at 1.5%. The temperature for longitudinal setting is controlled at 168℃, the setting time is 3.5 minutes, and the longitudinal tensile rate is controlled at 2.5%, to obtain the cleaning fabric.

[0026] Comparative Example 1 A method for preparing a fabric includes the following steps: S1. Ordinary polyester fiber with a single melting point is selected as raw material, without any pretreatment; S2. After the polyester fibers are drawn into filaments, they are made into strands using conventional twisting methods. The twisting process is uniformly controlled at 90 twists / meter and the twisting speed is 200 revolutions / minute. S3. The strands are woven into a fabric blank using a regular rapier loom. During the weaving process, the base fabric and friction layer structures are not distinguished. The weft insertion speed is controlled at 800 meters / minute, and the weaving tension is controlled at 120N. S4. Apply resin coating to the fabric blank by uniformly coating the formaldehyde-containing resin on the fabric surface, controlling the coating thickness to be 0.3 mm, and curing at 180℃ for 8 minutes. S5. The coated fabric blank is directly dyed using a room temperature dyeing process, with the dyeing temperature controlled at 100℃ and the dyeing time at 45 minutes. After dyeing, it is simply washed with water for 10 minutes. S6. Perform a one-time heat setting treatment on the dyed fabric blank. The setting temperature is uniformly controlled at 150℃ and the setting time is 10 minutes to obtain the fabric.

[0027] result Performance indicators Example 1 Example 2 Example 3 Example 4 Comparative Example 1 coefficient of friction 0.85 0.87 0.84 0.86 0.78 Fracture strength (N) 302 290 298 305 180 Formaldehyde emission (mg / m³) <0.03 <0.03 Not detected <0.03 0.72 Abrasion resistance (attenuation rate after 1000 cycles) 7.5% 7.8% 7.9% 7.6% 45% Heat resistance (after 2 hours in a water bath at 80°C) Stable performance Stable performance Stable performance Stable performance The coefficient of friction decreased to 0.45. Wash fastness (grade) 4 4 4 4-5 3 Color fastness to rubbing (grade) 4 4 4 4 2-3 In summary, referring to Table 1, the embodiments of this invention, through plasma pretreatment and staged twisting weaving of bicomponent polyester fibers combined with a gradient heat setting process, produce a high-performance fabric with a stable coefficient of friction of 0.84-0.87 and a breaking strength as high as 290-305N. Its formaldehyde emission is <0.03mg / m³, and its abrasion resistance decay rate is less than 8%. After being bathed in an 80℃ water bath, its performance shows no degradation, and its color fastness reaches grade 4 or above. Its overall performance is significantly better than the comparative example. The comparative example, using a traditional resin coating process, has an initial coefficient of friction of only 0.78, which drops sharply to 0.45 upon heating. Its formaldehyde emission reaches 0.72mg / m³, its abrasion resistance is poor, and its color fastness is less than grade 3. This fully demonstrates that the present invention, through innovative physical structure replacing chemical coating, achieves a breakthrough in durable, efficient, safe, and environmentally friendly cleaning fabrics.

Claims

1. A method for preparing a cleaning fabric made of dual-melting-point polyester fiber, characterized in that: Includes the following steps, S1. Two polyester fibers with different melting points were selected as raw materials, and the two polyester fibers were subjected to low-temperature plasma pretreatment respectively; S2. The two pretreated polyester fibers are drawn into filaments, and the two polyester fiber filaments are combined into a strand by a staged twisting method. First, coarse twisting is performed, and then fine twisting is performed. S3. A special weaving process is used to weave the ply yarn into a fabric blank. The fabric blank includes a base fabric and a friction layer. The friction layer is woven from ply yarn and has vertical lines inside. The vertical lines are arranged at intervals along the width of the fabric blank and intersect the warp of the base fabric at a specific angle. During the weaving process, the weaving compactness is controlled to make the fabric blank structure strong. S4. The fabric blank is subjected to a shaping and finishing process. During the shaping and finishing process, the processing temperature and relative humidity of the environment are controlled at the same time. First, the processing temperature is raised to the set high temperature range and kept warm, and then lowered to the set low temperature range and kept warm, so that the vertical lines in the friction layer melt and solidify into hard lumps. S5. The pre-dyed fabric body after the finishing process is first dyed, and then dyed with dye. S6. Perform segmented shaping on the dyed fabric blank, first performing transverse shaping and then longitudinal shaping to obtain cleaning fabric.

2. The method for preparing a dual-melting-point polyester fiber cleaning fabric according to claim 1, characterized in that: In step S1, the low-temperature plasma pretreatment uses argon as the treatment gas, the plasma power is controlled at 300-400W, the treatment time is 2-3 minutes, and the gas flow rate is maintained at 10-15L / min during the treatment.

3. The method for preparing a dual-melting-point polyester fiber cleaning fabric according to claim 1, characterized in that: In step S2, the twist of the coarse twisting process is controlled at 60-80 twists / meter, and the coarse twisting speed is 200-250 rpm; the twist of the fine twisting process is controlled at 100-120 twists / meter, and the fine twisting speed is 250-300 rpm.

4. The method for preparing a dual-melting-point polyester fiber cleaning fabric according to claim 1, characterized in that: In step S3, the vertical lines of the friction layer are spaced 2-3 mm apart, and the angle between the vertical lines and the warp of the base fabric is 45-60°.

5. The method for preparing a dual-melting-point polyester fiber cleaning fabric according to claim 1, characterized in that: In step S3, the special weaving process is implemented using an air-jet loom. The weft insertion speed of the air-jet loom is 1050-1150 meters / minute, the shedding time is 285-295°, and the weaving tension is controlled at 160-190N.

6. The method for preparing a dual-melting-point polyester fiber cleaning fabric according to claim 1, characterized in that: In step S4, the relative humidity of the environment for shaping and finishing is controlled at 40-50%RH, the temperature of the high-temperature section is set at 205-210℃, and the holding time is 12-14 minutes; the temperature of the low-temperature section is set at 195-200℃, and the holding time is 6-7 minutes.

7. The method for preparing a dual-melting-point polyester fiber cleaning fabric according to claim 1, characterized in that: In step S4, the shaping and finishing process is carried out using a hot air shaping machine. The hot air velocity of the hot air shaping machine is controlled at 1.6-1.9 m / s, and the uniformity error of the hot air temperature does not exceed ±4℃.

8. The method for preparing a dual-melting-point polyester fiber cleaning fabric according to claim 1, characterized in that: In step S5, the pre-dyeing treatment uses a diluted solution of disperse dye, the pre-dyeing temperature is controlled at 80-90℃, the pre-dyeing time is 15-20 minutes, and the amount of disperse dye in the diluted solution is 2-3% owf. During the formal dyeing, disperse dye is still used, the dyeing temperature is 135-140℃, the dyeing time is 32-38 minutes, and the pH value of the dye solution is 4.8-5.

2.

9. The method for preparing a dual-melting-point polyester fiber cleaning fabric according to claim 1, characterized in that: In step S5, after the formal dyeing is completed, the fabric body is washed with water. The washing temperature is controlled at 42-48℃, the washing time is 16-18 minutes, and a neutral detergent is added to the water during washing. The amount of neutral detergent is 6-7g / L, and the water flow rate is controlled at 0.8-1.0m / s during the washing process.

10. The method for preparing a dual-melting-point polyester fiber cleaning fabric according to claim 1, characterized in that: In step S6, the temperature for transverse shaping is controlled at 160-165℃, the shaping time is 5-6 minutes, and the transverse elongation rate is controlled at 1-2%; the temperature for longitudinal shaping is controlled at 165-170℃, the shaping time is 3-4 minutes, and the longitudinal elongation rate is controlled at 2-3%.

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