Anti-static garment fabric and processing technology thereof

Abstract

This invention relates to the field of textile material processing technology, and discloses an antistatic clothing fabric and its processing technology. The processing technology includes the following steps: Step 1, Preparation of profiled fibers: Polyester chips are melt-spun and extruded using a trilobal spinneret. The monofilament cross-section has a 120° symmetrically distributed ridge structure, and the ratio of ridge height to groove depth is 1:1.8-2.2; Step 2, Graded drafting: Three-stage gradient drafting is performed in the spinning channel, with a first-stage drafting ratio of 2.5-3.0 (temperature 80-90℃), a second-stage drafting ratio of 1.8-2.2 (temperature 100-110℃), and a third-stage drafting ratio of 1.2-1.5 (temperature 60-70℃); In terms of antistatic performance, the surface resistivity can be as low as 5.5×10⁻⁶. 8 With a static voltage half-life of only 0.5s and a value of Ω / sq, it is far superior to existing technologies and can quickly dissipate static electricity, meeting the safety requirements of fields such as electronics and chemicals.

Description

Technical Field

[0001] This invention relates to the field of textile material processing technology, specifically to an antistatic clothing fabric and its processing technology. Background Technology

[0002] In electronic chip manufacturing workshops, the static voltage generated by friction between clothing and workers walking in ordinary work clothes can reach 3000-5000V, enough to break down the chip oxide layer (the breakdown threshold is usually <250V), leading to the scrapping of batches of products. Statistics from a semiconductor company show that product defects caused by static electricity in clothing account for 18%-22% of the total defect rate, resulting in annual losses exceeding ten million yuan. Existing antistatic fabrics mainly achieve their function in two ways: one is by adding quaternary ammonium salt antistatic agents, but these agents are prone to migration during washing; after 10 washes, the surface resistivity can drop from 10... 9 Ω / sq increased to 10 12 If the Ω / sq value is above a certain level, the antistatic ability is completely lost; secondly, blended carbon fiber or metal wire, although it has better durability, will cause the fabric's breathability to decrease by more than 40%, and the metal wire is prone to breakage, forming hard spots that wear down the surface of precision instruments.

[0003] Meanwhile, antistatic tooling in the petrochemical industry must also possess oil-repellent properties. Existing fabrics, once contaminated with machine oil, are not only difficult to clean, but the oil also fills the fiber gaps, forming a conductive barrier layer that extends the static voltage half-life from <1s to over 5s. Data from a refinery shows that antistatic clothing contaminated with oil experiences a 60%-70% decrease in static dissipation efficiency, posing a risk of static-induced combustion. Furthermore, in traditional processing, fabrics woven from circular cross-section fibers have a smooth surface, resulting in poor adhesion of antistatic agents; the single-drawing process leads to stress concentration within the fibers, with warp tensile strength generally below 400N, making it difficult to meet the wear-resistant requirements of tooling.

[0004] Currently, the industry urgently needs a processing technology that can solve the problems of insufficient antistatic performance and durability, as well as poor oleophobicity, while ensuring the mechanical properties and wearing comfort of the fabric to adapt to the harsh usage environments in the electronics, chemical and other fields. Summary of the Invention

[0005] This invention aims to solve the problems of poor antistatic performance, insufficient durability, and poor oleophobicity of existing antistatic fabrics, and provides a processing technology for antistatic clothing fabrics. The fabric produced by this process has excellent antistatic performance, oleophobicity, and durability.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a processing technology for antistatic clothing fabric, comprising the following steps:

[0007] Step 1, Preparation of irregularly shaped fibers: Polyester chips are melt-spun and extruded using a three-lobed spinneret. The cross-section of the monofilament has a 120° symmetrically distributed ridge structure, and the ratio of ridge height to groove depth is 1:1.8-2.2.

[0008] Step 2, graded drafting: Three-stage gradient drafting is carried out in the spinning tunnel, with a first-stage drafting ratio of 2.5-3.0 (temperature 80-90℃), a second-stage drafting ratio of 1.8-2.2 (temperature 100-110℃), and a third-stage drafting ratio of 1.2-1.5 (temperature 60-70℃).

[0009] Step 3, High-density low-tension weaving: warp density ≥ 120 yarns / cm, weft density ≥ 80 yarns / cm, weaving tension ≤ 15cN / tex;

[0010] Step 4, Gradient heat setting: Heat from room temperature to 105-110℃ at a rate of 5℃ / min and hold for 10min, then heat to 125-130℃ at a rate of 2℃ / min and hold for 5min, and finally cool to 50℃ at a rate of 8℃ / min.

[0011] Step 5, Directional Plasma Etching: Under an argon atmosphere, with a power of 300-500W and a processing time of 30-60s, the electrode is 10-15mm away from the fabric. Selectively etch the fiber trench area.

[0012] Step 6: Mechanical kneading activation: Use a curved roller to knead the fabric in both directions at a speed of 5-8 rpm and a pressure of 0.2-0.5 MPa for 3-5 minutes.

[0013] Preferably, the width of the convex ridge of the trilobal cross-section in step one is 5-8 μm, and the radius of curvature at the bottom of the groove is ≤0.5 μm.

[0014] Preferably, the humidity control in step two for the three-stage stretching is as follows: 85-90% humidity for the first stage, 70-75% humidity for the second stage, and 40-45% humidity for the third stage.

[0015] Preferably, during the heat setting process in step four, an axial alternating electric field is applied with an electric field strength of 1-3 kV / cm and a frequency of 50-100 Hz.

[0016] Preferably, the plasma treatment in step five adopts a pulse mode with a pulse width of 10-20 ms and a duty cycle of 30-50%.

[0017] Preferably, in step six, the surface of the curved roller is provided with micro-conical protrusions, the protrusion height is 100-200 μm, and the density is 50-80 protrusions / cm. 2 .

[0018] An antistatic and oleophobic clothing fabric with a surface resistivity ≤10 9Ω / sq, contact angle with n-hexadecane ≥130°, performance degradation rate <10% after 50 standard washes.

[0019] Compared with the prior art, the present invention provides an antistatic clothing fabric and its processing technology, which has the following beneficial effects: in terms of antistatic performance, the surface resistivity can be as low as 5.5×10⁻⁶. 8 With a static voltage half-life of only 0.5s (Ω / sq), far superior to existing technologies, it can quickly dissipate static electricity, meeting the safety requirements of electronics, chemical and other fields. Regarding oleophobicity, it achieves a contact angle of ≥130° with n-hexadecane, effectively reducing oil contamination and the resulting decrease in antistatic performance. It exhibits outstanding durability, with a resistivity change rate of only <10% after 50 washes, solving the problem of traditional fabrics' antistatic performance easily declining with washing. Simultaneously, it maintains excellent mechanical properties, with a warp tensile strength of 480N-520N, balancing durability and wearability. The synergistic effect of each process step achieves simultaneous improvement in antistatic, oleophobic, durable, and mechanical properties, significantly outperforming existing technologies. Attached Figure Description

[0020] Figure 1 This is a SEM image of the groove nanoburrs after ion etching according to the present invention. Detailed Implementation

[0021] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0022] Figure 1 Images were acquired using a field emission scanning electron microscope (FE-SEM, such as JEOL JSM-7900F or Thermo Scientific Apreo), with an accelerating voltage of 5 kV, a working distance of approximately 4 mm, and secondary electron imaging mode (SE2). The sample is a trilobal fiber trench surface after plasma etching. The images clearly show the nanoburr structure formed on the trench walls, with a scale bar of 2 μm.

[0023] Instrument name and model:

[0024] Preparation of irregularly shaped fibers: melt spinning machine (model: JS-800), equipped with a three-lobed spinneret (model: SY-3Y, orifice diameter 0.2mm);

[0025] Graded drawing: Multi-stage gradient drawing machine (model: QD-3C, with independent temperature and humidity control function);

[0026] High-density, low-tension weaving: High-speed rapier loom (Model: GA747-Ⅲ, adjustable weaving tension range 5-30cN / tex);

[0027] Gradient heat setting: Gradient heat setting machine (Model: RX-600, with axial alternating electric field generator, electric field strength adjustable from 0-5kV / cm);

[0028] Directional plasma etching: Low-temperature plasma treatment machine (Model: PLASMA-400, argon atmosphere compatible, power adjustable from 0-600W);

[0029] Mechanical kneading activation: Curved roller kneading machine (Model: RK-200, curved roller diameter 150mm, speed adjustable from 0-10rpm);

[0030] Surface resistance testing: Surface resistance tester (Model: EST121, testing range 10) 3 -10 14 Ω);

[0031] Contact angle test of n-hexadecane: Contact angle measuring instrument (model: JC2000D3, resolution 0.01°);

[0032] Electrostatic half-life test: Electrostatic decay meter (model: SIMCOFMX-003, charging voltage adjustable from 0-10000V);

[0033] Washing test: Standard household washing machine (model: XQG80-B14976L, with custom program function);

[0034] Warp breaking strength test: Electronic fabric strength tester (model: YG026D, test range 0-5000N).

[0035] (a) Surface resistance test

[0036] Reference Standard: GB / T22042-2008 "Requirements and Test Methods for Antistatic Performance of Clothing"

[0037] Test steps:

[0038] Sample pretreatment: Place the fabric in an environment with a temperature of 23±2℃ and a relative humidity of 50±5% for 24 hours.

[0039] Instrument calibration: using a standard resistor (10) 5 Ω-10 13 Ω) Calibrate the surface resistance tester to ensure the error is within ±10%.

[0040] Sample fixing: Lay the fabric flat on the insulating table and fix the four corners with conductive glue to avoid wrinkles.

[0041] Test procedure: Place the two electrodes of the tester (50mm in diameter, 100mm apart) stably on the sample surface, apply a 100V DC voltage, maintain for 1 minute, and then read the current value.

[0042] Repeated testing: Repeat the test at different locations on the sample (at least 5 points) and take the arithmetic mean.

[0043] Calculation method: Surface resistance is equal to the applied voltage value divided by the current value passing through the sample (Surface resistance = voltage ÷ current).

[0044] (ii) Contact angle test of n-hexadecane

[0045] Reference standard: GB / T30693-2014 "Measurement of the contact angle between plastic film and water" (adjusted for oleophobicity test)

[0046] Test steps:

[0047] Sample pretreatment: Same as the environmental pretreatment for surface resistance testing.

[0048] Instrument preparation: Calibrate the contact angle measuring instrument and ensure that the dripping device (needle diameter 0.5mm) and image acquisition system are functioning properly.

[0049] Sample fixation: Fix the fabric flat on the stage, ensuring that the test area is free of lint or wrinkles.

[0050] Dropping procedure: Use a microsyringe to take 5 μL of n-hexadecane and drop it 1 mm above the sample surface, avoiding impact on the sample.

[0051] Angle measurement: After the droplet stabilizes (about 10 seconds), the droplet profile is captured by an imaging system, and the contact angle is measured using the tangent method.

[0052] Repeat the test: Test 5 times at different locations and take the arithmetic mean.

[0053] Calculation method: The contact angle is the angle formed by the droplet profile and the sample surface, calculated by the instrument's built-in software using the tangent method, without any additional formula.

[0054] (III) Static Voltage Half-Life Test

[0055] Reference Standard: SJ / T10694-2006 "General Specification for Anti-static Testing of Electronic Product Manufacturing and Application Systems"

[0056] Test steps:

[0057] Environmental control: Maintain the test environment temperature at 23±2℃ and relative humidity at 30±5%.

[0058] Instrument calibration: Use a standard electrostatic generator and attenuator to calibrate the charging voltage (5000V) and time measurement accuracy.

[0059] Sample placement: Hang the fabric on an insulating bracket, 30cm away from the ground plane, to ensure that the sample is not grounded.

[0060] Charging procedure: Apply a voltage of 5000V to the sample at a distance of 3cm using the charging electrode, and remove the charging electrode after 30 seconds.

[0061] Attenuation recording: Immediately use the measuring electrode (5cm away from the sample) to record the time it takes for the static voltage to decay from 5000V to 2500V (half of the initial value), which is the half-life.

[0062] Repeat the test: Change the sample area and test 3 times, and take the arithmetic mean.

[0063] Calculation method: The static voltage half-life is the time required for the static voltage to decay from its initial value to half of its initial value, and is recorded directly by the instrument.

[0064] (iv) Resistance change test after 50 washes

[0065] Reference standards: GB / T8629-2017 "Home washing and drying procedures for testing textiles" + GB / T22042-2008 (combined)

[0066] Test steps:

[0067] Washing preparation: Use a standard household washing machine, add neutral detergent (concentration 0.2%), water temperature 30±2℃, liquor ratio 1:50.

[0068] Washing program: Put the sample (10cm×10cm) and 500g wash cloth into the washing machine and wash according to the standard program (wash for 15 minutes, rinse 3 times, 5 minutes each time, spin dry for 1 minute).

[0069] Drying treatment: After washing, air dry the sample naturally at 23±2℃, avoiding direct sunlight.

[0070] Repeat operation: Complete one wash-dry cycle, repeating a total of 50 times.

[0071] Resistance test: Test the surface resistance before and after washing according to the "Surface Resistance Test" steps.

[0072] Calculation method: The resistance change rate after 50 washes is equal to (resistance value after washing minus resistance value before washing) divided by the resistance value before washing, and then multiplied by 100% (resistance change rate = (resistance after washing - resistance before washing) ÷ resistance before washing × 100%).

[0073] (v) Meridional fracture strength test

[0074] Reference standard: GB / T3923.1-2013 "Textiles - Tensile properties of fabrics - Part 1: Determination of breaking strength and elongation at break (strip method)"

[0075] Test steps:

[0076] Sample preparation: Cut 5 samples along the warp of the fabric, each measuring 300mm × 50mm. Mark each sample 100mm from both ends (effective test length 100mm).

[0077] Instrument calibration: Calibrate the electronic tensile testing machine, select a range of 5000N, and set the tensile speed to 100mm / min.

[0078] Clamping the specimen: Clamp both ends of the specimen into the upper and lower clamps of the strength tester, ensuring that the specimen axis is parallel to the clamping line, and the clamping force is 50N (to avoid slippage).

[0079] Tensile test: Start the instrument and record the maximum force value (fracture strength) at the moment the specimen breaks.

[0080] Data processing: Remove outliers (such as fractures caused by improper clamping) and take the arithmetic mean of the remaining samples.

[0081] Calculation method: The meridional fracture strength is the maximum tensile force that the specimen can withstand when it breaks. It is recorded directly by a strength testing machine, and the arithmetic mean is taken.

[0082] Example 1

[0083] A processing technology for antistatic clothing fabric specifically includes the following steps:

[0084] Preparation of profiled fibers: Polyester chips are melt-spun and extruded using a trilobal spinneret. The cross-section of the monofilament has a 120° symmetrical ridge structure, with the ratio of ridge height to groove depth being 1:1.8, the ridge width being 5μm, and the bottom curvature radius of the groove being 0.5μm.

[0085] Graded drawing: Three-stage gradient drawing is carried out in the spinning channel. The first stage drawing ratio is 2.5 (temperature 80℃, humidity 85%), the second stage drawing ratio is 1.8 (temperature 100℃, humidity 70%), and the third stage drawing ratio is 1.2 (temperature 60℃, humidity 40%).

[0086] High-density, low-tension weaving: warp density 120 yarns / cm, weft density 80 yarns / cm, weaving tension 15cN / tex.

[0087] Gradient heat setting: The temperature is raised from room temperature to 105℃ at a rate of 5℃ / min and held for 10 min, then raised to 125℃ at a rate of 2℃ / min and held for 5 min, and finally rapidly cooled to 50℃ at a rate of 8℃ / min. An axial alternating electric field with an electric field strength of 1kV / cm and a frequency of 50Hz is applied during the heat setting process.

[0088] Directional plasma etching: Under an argon atmosphere, with a power of 300W and a processing time of 30s, the electrode is 10mm away from the fabric. The fiber trench area is selectively etched. The plasma processing adopts a pulse mode with a pulse width of 10ms and a duty cycle of 30%.

[0089] Mechanical kneading activation: The fabric is kneaded bidirectionally at a speed of 5 rpm using a curved roller with a pressure of 0.2 MPa for 3 minutes. The surface of the curved roller has micro-conical protrusions with a height of 100 μm and a density of 50 protrusions / cm³. 2 .

[0090] Example 2

[0091] A processing technology for antistatic clothing fabric specifically includes the following steps:

[0092] Preparation of profiled fibers: Polyester chips are melt-spun and extruded using a trilobal spinneret. The cross-section of the monofilament has a 120° symmetrical ridge structure, with the ratio of ridge height to groove depth being 1:2.0, the ridge width being 6.5 μm, and the bottom curvature radius of the groove being 0.4 μm.

[0093] Graded drawing: Three-stage gradient drawing is carried out in the spinning channel. The first stage drawing ratio is 2.7 (temperature 85℃, humidity 87%), the second stage drawing ratio is 2.0 (temperature 105℃, humidity 72%), and the third stage drawing ratio is 1.3 (temperature 65℃, humidity 42%).

[0094] High-density, low-tension weaving: warp density 130 yarns / cm, weft density 85 yarns / cm, weaving tension 12cN / tex.

[0095] Gradient heat setting: The temperature is raised from room temperature to 107℃ at a rate of 5℃ / min and held for 10 min, then raised to 127℃ at a rate of 2℃ / min and held for 5 min, and finally rapidly cooled to 50℃ at a rate of 8℃ / min. An axial alternating electric field with an electric field strength of 2kV / cm and a frequency of 75Hz is applied during the heat setting process.

[0096] Directional plasma etching: Under an argon atmosphere, with a power of 400W and a processing time of 45s, the electrode is 12mm away from the fabric. The fiber trench area is selectively etched. The plasma processing adopts a pulse mode with a pulse width of 15ms and a duty cycle of 40%.

[0097] Mechanical kneading activation: The fabric is kneaded bidirectionally at a speed of 6.5 rpm and a pressure of 0.35 MPa for 4 minutes using a curved roller. The surface of the curved roller has micro-conical protrusions with a height of 150 μm and a density of 65 protrusions / cm³. 2 .

[0098] Example 3

[0099] A processing technology for antistatic clothing fabric specifically includes the following steps:

[0100] Preparation of profiled fibers: Polyester chips are melt-spun and extruded using a trilobal spinneret. The cross-section of the monofilament has a 120° symmetrical ridge structure, with the ratio of ridge height to groove depth being 1:2.2, the ridge width being 8μm, and the bottom curvature radius of the groove being 0.3μm.

[0101] Graded drawing: Three-stage gradient drawing is carried out in the spinning channel. The first stage drawing ratio is 3.0 (temperature 90℃, humidity 90%), the second stage drawing ratio is 2.2 (temperature 110℃, humidity 75%), and the third stage drawing ratio is 1.5 (temperature 70℃, humidity 45%).

[0102] High-density, low-tension weaving: warp density 140 yarns / cm, weft density 90 yarns / cm, weaving tension 10cN / tex.

[0103] Gradient heat setting: The temperature is raised from room temperature to 110℃ at a rate of 5℃ / min and held for 10 min, then raised to 130℃ at a rate of 2℃ / min and held for 5 min, and finally rapidly cooled to 50℃ at a rate of 8℃ / min. An axial alternating electric field with an electric field strength of 3kV / cm and a frequency of 100Hz is applied during the heat setting process.

[0104] Directional plasma etching: Under an argon atmosphere, with a power of 500W and a processing time of 60s, the electrode is 15mm away from the fabric. The fiber trench area is selectively etched. The plasma processing adopts a pulse mode with a pulse width of 20ms and a duty cycle of 50%.

[0105] Mechanical kneading activation: The fabric is kneaded bidirectionally at a speed of 8 rpm and a pressure of 0.5 MPa for 5 minutes using a curved roller. The surface of the curved roller has micro-conical protrusions with a height of 200 μm and a density of 80 protrusions / cm³. 2 .

[0106] Example 4

[0107] A processing technology for antistatic clothing fabric specifically includes the following steps:

[0108] Preparation of profiled fibers: Polyester chips are melt-spun and extruded using a trilobal spinneret. The cross-section of the monofilament has a 120° symmetrical ridge structure, with the ratio of ridge height to groove depth being 1:2.0, the ridge width being 7μm, and the bottom curvature radius of the groove being 0.4μm.

[0109] Graded drawing: Three-stage gradient drawing is carried out in the spinning channel. The first stage drawing ratio is 2.8 (temperature 87℃, humidity 88%), the second stage drawing ratio is 2.1 (temperature 108℃, humidity 73%), and the third stage drawing ratio is 1.4 (temperature 68℃, humidity 43%).

[0110] High-density, low-tension weaving: warp density 135 yarns / cm, weft density 88 yarns / cm, weaving tension 13cN / tex.

[0111] Gradient heat setting: The temperature is raised from room temperature to 108℃ at a rate of 5℃ / min and held for 10 min, then raised to 128℃ at a rate of 2℃ / min and held for 5 min, and finally rapidly cooled to 50℃ at a rate of 8℃ / min. An axial alternating electric field with an electric field strength of 2.5kV / cm and a frequency of 85Hz is applied during the heat setting process.

[0112] Directional plasma etching: Under an argon atmosphere, with a power of 450W and a processing time of 50s, the electrode is 13mm away from the fabric. The fiber trench area is selectively etched. The plasma processing adopts a pulse mode with a pulse width of 18ms and a duty cycle of 45%.

[0113] Mechanical kneading activation: The fabric is kneaded bidirectionally at a speed of 7 rpm using a curved roller with a pressure of 0.4 MPa for 4.5 minutes. The surface of the curved roller has micro-conical protrusions with a height of 180 μm and a density of 70 protrusions / cm³. 2 .

[0114] Comparative Example 1

[0115] Circular cross-section fibers are used, and the other steps are the same as in Example 2.

[0116] Comparative Example 2

[0117] The graded drawing process uses a single-stage drawing (drawing ratio 4.0, temperature 90℃, humidity 60%), and the other steps are the same as in Example 2.

[0118] Comparative Example 3

[0119] The warp density is 100 yarns / cm, the weft density is 60 yarns / cm, the weaving tension is 20cN / tex, and the other steps are the same as in Example 2.

[0120] Comparative Example 4

[0121] Heat setting is performed at a constant temperature of 120℃ for 15 minutes without applying an axial alternating electric field. Other steps are the same as in Example 2.

[0122] Comparative Example 5

[0123] Plasma etching was performed in an air atmosphere with a power of 200W and a processing time of 20s. Other steps were the same as in Example 2.

[0124] Comparative Example 6

[0125] Mechanical kneading was performed using a flat roller at a speed of 3 rpm and a pressure of 0.1 MPa for 2 minutes. Other steps were the same as in Example 2.

[0126] Comparative Example 7

[0127] Purchase commercially available antistatic clothing fabrics.

[0128] Performance tests were conducted on the products of the examples and comparative examples, specifically including surface resistance, n-hexadecane contact angle, electrostatic voltage half-life, resistance change after 50 washes, and meridional breaking strength. The specific test results are detailed in Tables 1 and 2.

[0129] Table 1

[0130]

[0131] Table 2

[0132]

[0133] This invention uses a trilobal spinneret to prepare irregularly shaped fibers with a 120° symmetrical convex ridge structure. Compared with Comparative Example 1 (circular cross-section fiber), it can be seen that: the surface resistance of Example 2 is much lower than that of Comparative Example 1; the contact angle of n-hexadecane is 138°, which is significantly improved compared with Comparative Example 1; the electrostatic half-life is 0.6s, which is only 11.5% of that of Comparative Example 1.

[0134] This is because the ridges and grooves of the trilobal cross-section form multiple conductive paths, while the grooves can trap air to form an oleophobic interface. The optimized design of the ridge height to groove depth ratio of 1:1.8-2.2, combined with a ridge width of 5-8μm and a groove curvature radius of ≤0.5μm, not only ensures the mechanical properties of the fiber, but also further enhances the functional characteristics of the grooves through the selective effect of directional plasma etching (step five).

[0135] A comparison of the three-stage gradient drawing process with the single-stage drawing process of Comparative Example 2 shows that the surface resistance of Example 2 is significantly lower than that of Comparative Example 2, and the rate of change in resistance after washing is also significantly better than that of Comparative Example 2.

[0136] Gradient temperature and humidity control ensures uniform release of internal fiber stress, and the synergistic effect of the three-stage draw ratio avoids fiber damage caused by single-stage high-ratio draw. The warp breaking strength of Example 2 is significantly improved compared to Comparative Example 2, demonstrating that this process enhances functional performance while ensuring physical properties.

[0137] The high-density design with warp yarn density ≥120 ends / cm and weft yarn density ≥80 ends / cm, combined with low tension control of ≤15cN / tex, resulted in a significant reduction in surface resistivity in Example 2 compared to Comparative Example 3. The high warp and weft density increased the number of contact points between fibers, while the low tension prevented damage to the fiber structure.

[0138] Comparative Example 3, due to insufficient weaving density and high tension, resulted in reduced conductive paths and fiber damage. Its static voltage half-life was 4.7 times that of Example 2, and its resistance change rate after washing was also much higher than that of Example 2.

[0139] The heat setting process of gradient heating + axial alternating electric field has significant advantages over the isothermal setting of Comparative Example 4: the surface resistance of Example 2 is significantly reduced compared with Comparative Example 4, and the contact angle is also improved to a certain extent.

[0140] Gradient heating causes the fiber molecular chains to align in an orderly manner, and the alternating electric field promotes the directional distribution of polar groups, forming a stable conductive network. The resistance change rate after washing in Example 2 was also much lower than that in Comparative Example 4, further demonstrating that this process significantly improves performance durability. The rapid cooling to 50°C step further reduces the risk of performance degradation by fixing the molecular configuration.

[0141] Compared with Comparative Example 5, the surface resistance of Example 2 was significantly reduced and the contact angle was also significantly increased by pulsed plasma etching with a power of 300-500W under an argon atmosphere.

[0142] The inert nature of argon plasma prevents fiber oxidation, and the 30-60s processing time combined with a 10-15mm electrode spacing allows for precise etching of the groove area without damaging the ridges. The pulse mode reduces thermal damage, resulting in a significantly lower resistance change rate in Example 2 after 50 washes compared to Comparative Example 5.

[0143] The curved roller bidirectional kneading (5-8 rpm) combined with micro-conical protrusions (100-200 μm height) has obvious advantages over Comparative Example 6 (flat roller): The surface resistance of Example 2 is significantly lower than that of Comparative Example 6, and the contact angle is significantly increased.

[0144] The kneading action of the curved rollers fully exposes the fiber grooves, creating micro-conical protrusions (50-80 per cm). 2 This creates localized high-voltage activation points. A pressure control of 0.2-0.5 MPa ensures activation while preventing fiber breakage. An optimized processing time of 4.5 minutes (Example 4) reduces the static voltage half-life to 0.5 seconds, achieving rapid voltage elimination.

[0145] This synergistic effect is manifested in the following ways: irregularly shaped fibers provide the structural foundation → graded stretching ensures structural integrity → high-density weaving constructs a conductive network → gradient heat setting stabilizes the molecular configuration → plasma etching strengthens the functional interface → mechanical rubbing activates surface properties. Such a significant improvement cannot be achieved through a single process improvement, demonstrating the outstanding substantive features and remarkable progress of the process in this invention.

[0146] The above are merely specific embodiments of the present invention, but the technical features of the present invention are not limited thereto. Any simple changes, equivalent substitutions, or modifications made based on the present invention to solve essentially the same technical problems and achieve essentially the same technical effects are all covered within the protection scope of the present invention.

Claims

1. A processing technology for antistatic clothing fabric, characterized in that: Includes the following steps: Step 1, Preparation of irregularly shaped fibers: Polyester chips are melt-spun and extruded using a trilobal spinneret. The cross-section of the monofilament has a 120° symmetrically distributed ridge structure, and the ratio of ridge height to groove depth is 1:1.8-2.

2. Step 2, graded drafting: Three-stage gradient drafting is carried out in the spinning tunnel. The first stage drafting ratio is 2.5-3.0, and the temperature is 80-90℃. The second stage drafting ratio is 1.8-2.2, and the temperature is 100-110℃. The third stage drafting ratio is 1.2-1.5, and the temperature is 60-70℃. Step 3, High-density low-tension weaving: warp density ≥ 120 yarns / cm, weft density ≥ 80 yarns / cm, weaving tension ≤ 15cN / tex; Step 4, Gradient heat setting: Heat from room temperature to 105-110℃ at a rate of 5℃ / min and hold for 10min, then heat to 125-130℃ at a rate of 2℃ / min and hold for 5min, and finally cool to 50℃ at a rate of 8℃ / min. Step 5, Directional Plasma Etching: Under an argon atmosphere, with a power of 300-500W and a processing time of 30-60s, the electrode is 10-15mm away from the fabric. Selectively etch the fiber trench area. Step 6: Mechanical kneading activation: Use a curved roller to knead the fabric in both directions at a speed of 5-8 rpm and a pressure of 0.2-0.5 MPa for 3-5 minutes. The width of the convex ridge of the trilobal cross-section mentioned in step one is 5-8 μm, and the radius of curvature at the bottom of the groove is ≤0.5 μm; The humidity control for the three stages of stretching in step two is as follows: 85-90% for stage one, 70-75% for stage two, and 40-45% for stage three. In step four, during the heat setting process, an axial alternating electric field is applied with an electric field strength of 1-3 kV / cm and a frequency of 50-100 Hz. In step five, the plasma treatment uses a pulse mode with a pulse width of 10-20 ms and a duty cycle of 30-50%. In step six, the surface of the curved roller is provided with micro-conical protrusions, with a protrusion height of 100-200μm and a density of 50-80 protrusions / cm³. 2 .

2. An antistatic and oleophobic clothing fabric, manufactured using the processing technology described in claim 1, characterized in that: Surface resistivity ≤10 9 Ω / sq, contact angle with n-hexadecane ≥130°, performance degradation rate <10% after 50 standard washes.

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