Antibacterial fiber yarn with anti-static function

Abstract

The utility model relates to fiber yarn technical field, especially an antibacterial fiber yarn with anti -static function, including metal conductive core layer, the metal conductive core layer is composed of stainless steel microfilament, the outer wall of metal conductive core layer is wrapped with antibacterial matrix layer, the antibacterial matrix layer is composed of the twist of any one material of polyester or nylon staple soaked into containing zeolite silver -carrying antibacterial agent, the utility model's advantage lies in: through the physical isolation layer design between metal conductive core layer and antibacterial matrix layer, the direct contact of conductive material and antibacterial agent is fundamentally blocked, the dispersion uniformity of zeolite silver -carrying agent of antibacterial matrix layer promotes, and the surface resistance fluctuation of metal conductive core layer is less than 5%, and the anti -static wrapping layer is tightly bound antibacterial matrix layer with spiral wrapping angle, and the polyether ester antistatic agent is added in spandex filament, the physical pressure of wrapping layer is combined and covered, makes the antistatic component difficult to be eluted, solves the performance failure problem caused by the peeling of coating.

Description

Technical Field

[0001] This utility model relates to the field of fiber yarn technology, and in particular to an antibacterial fiber yarn with antistatic function. Background Technology

[0002] Currently, fiber yarns that achieve dual antibacterial and antistatic functions are mainly produced by spinning conductive carbon black and inorganic antibacterial agents, such as silver-loaded zirconium phosphate, into polyester melt to form functional composite filaments, or by coating the surface of spandex core-spun yarn with a quaternary ammonium salt antibacterial coating and then wrapping it with conductive polyester staple fibers.

[0003] However, in the blending method, the adsorption of silver ions by conductive carbon black reduces the effective antibacterial components, and the conductive filler leads to uneven dispersion of the antibacterial agent. In the coating method, the coating fiber interface is weak and not resistant to washing, the quaternary ammonium salt coating peeling rate is ≥60%, and the resistance drift of the conductive wrapping layer is >±50%. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide an antibacterial fiber yarn with antistatic function, which effectively solves the deficiencies of the prior art.

[0005] To achieve the above objectives, one embodiment of this utility model provides an antibacterial fiber yarn with antistatic function, comprising a metal conductive core layer composed of stainless steel microfilaments, an antibacterial matrix layer wrapped around the outer wall of the metal conductive core layer, the antibacterial matrix layer being composed of either polyester or nylon staple fiber impregnated with a zeolite-containing silver-loaded antibacterial agent and twisted, a physical isolation layer being provided between the metal conductive core layer and the antibacterial matrix layer, and an antistatic wrapping layer being fixedly connected to the outside of the antibacterial matrix layer in a spiral wrapping manner, the antistatic wrapping layer being composed of spandex filaments with added polyether ester antistatic agent.

[0006] Preferably, in any of the above embodiments, the physical isolation layer is a polyurethane isolation layer coated on the outside of the metal conductive core layer, and the coating thickness of the polyurethane isolation layer is 0.5 μm.

[0007] The technical effect achieved by adopting the above solution is that it can prevent stainless steel microwires from contacting silver ions, thus stabilizing the amount of silver ions leached at 0.8-1.2 ppm.

[0008] Preferably, in any of the above schemes, the physical isolation layer is a hollow gap isolation layer, and the hollow gap isolation layer forms a physical gap through the secondary shrinkage of the antibacterial matrix layer during post-processing heat setting.

[0009] The technical effect achieved by adopting the above solution is that the coating process can be eliminated and energy consumption can be reduced by 35%.

[0010] Preferably, the stainless steel microwire has a diameter of 0.03-0.08 mm, is made of 316L material, and has a tensile breaking strength ≥3.8 cN / dtex.

[0011] The technical effect achieved by adopting the above solution is that the corrosion resistance of 316L material in sweat is 5 times higher than that of 304 stainless steel.

[0012] Preferably, in any of the above schemes, the twist of the antibacterial matrix layer is 600-800T / m, the zeolite silver-loaded antibacterial agent is uniformly dispersed by melt spinning masterbatch technology, and the agglomerate size of the zeolite silver-loaded antibacterial agent is ≤2μm.

[0013] The technical effect achieved by adopting the above solution is that it can improve gap stability and antibacterial uniformity.

[0014] This utility model has the following advantages: 1. This antibacterial fiber yarn with antistatic function, through the physical isolation layer 4 between the metal conductive core layer and the antibacterial matrix layer, fundamentally blocks the direct contact between the conductive material and the antibacterial agent. This structure keeps the silver ion dissolution amount stably maintained at an effective antibacterial concentration of 0.8-1.2ppm, improves the uniformity of dispersion of zeolite silver-loaded agent in the antibacterial matrix layer, and the antibacterial rate against Staphylococcus aureus is still ≥99% after 50 washes, while the surface resistance fluctuation of the metal conductive core layer is less than 5%.

[0015] 2. This antibacterial fiber yarn with antistatic function has an antistatic wrapping layer that tightly binds the antibacterial matrix layer with a spiral wrapping angle, replacing the traditional chemical coating. The polyether ester antistatic agent is added to the spandex filament, and combined with the physical pressing effect of the wrapping layer, the antistatic components are difficult to wash off, thus solving the performance failure problem caused by coating peeling. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the microstructure of the yarn cross-section of this utility model; In the diagram: 1-Metal conductive core layer, 2-Antibacterial substrate layer, 3-Antistatic wrapping layer, 4-Physical isolation layer. Detailed Implementation

[0017] The present invention will be further described below with reference to the accompanying drawings, but the scope of protection of the present invention is not limited to the following description.

[0018] like Figure 1As shown, an antibacterial fiber yarn with antistatic function includes a metal conductive core layer 1, which is composed of stainless steel microfilaments. The outer wall of the metal conductive core layer 1 is wrapped with an antibacterial matrix layer 2, which is composed of either polyester or nylon short fibers impregnated with a zeolite-containing silver-loaded antibacterial agent and twisted. A physical isolation layer 4 is provided between the metal conductive core layer 1 and the antibacterial matrix layer 2. An antistatic wrapping layer 3 is fixedly connected to the outside of the antibacterial matrix layer 2 in a spiral wrapping manner. The antistatic wrapping layer 3 is composed of spandex filaments with added polyether ester antistatic agent.

[0019] As an optional technical solution of this utility model, the stainless steel microwire has a diameter of 0.03-0.08mm, is made of 316L stainless steel, and has a tensile breaking strength of ≥3.8cN / dtex.

[0020] As an optional technical solution of this utility model, the twist of the antibacterial matrix layer 2 is 600-800T / m, and the zeolite silver-loaded antibacterial agent is uniformly dispersed by melt spinning masterbatch technology, with the agglomerate size of the zeolite silver-loaded antibacterial agent ≤2μm.

[0021] Example 1: The physical isolation layer 4 is a polyurethane isolation layer coated on the outside of the metal conductive core layer 1, and the coating thickness of the polyurethane isolation layer is 0.5 μm. The preparation steps in this embodiment include: S1. Conductive core pretreatment: Stainless steel microwires are passed through a coating machine at a speed of 15 m / min to coat a 0.5 μm polyurethane layer, and then cured with hot air at 80°C for 5 seconds (film thickness CV value ≤ 5%). S2. Preparation of antibacterial matrix: Nylon staple fibers were impregnated with zeolite silver carrier (bath ratio 1:20, 50℃×30min), then centrifuged to dehydrate to a moisture content of 25%, and finally dried at 110℃. S3, Twisting into yarn: The coated microfilaments were coated with a twist of 700T / m on a coating machine (matrix layer tension 12cN). S4. Anti-static wrapping: Antistatic spandex filaments are spirally wrapped around the antibacterial matrix layer at a 40° wrapping angle (wrapping tension 10cN, speed 200m / min). S5, Heat setting: 125℃ hot air treatment for 20 seconds (spandex shrinkage rate 18%, nylon shrinkage rate 8%).

[0022] Example 2: The physical isolation layer 4 is a hollow gap isolation. During the heat setting process, the antibacterial matrix layer 2 shrinks twice to form a physical gap. The hollow gap is based on the gap isolation and structural combination scheme realized by existing textile engineering technology. It achieves a reliable combination through mechanical interlocking and elastic restraint, without the need for chemical adhesives, thus ensuring industrial feasibility.

[0023] The preparation steps in this embodiment include: A1. Direct feeding of conductive core: Stainless steel microwires are passed through a coating machine with a low tension of 0.3 cN (to avoid pre-stretching). A2. Antibacterial matrix coating: Antibacterial polyester staple fiber is coated with microfilaments at a high twist of 800T / m (matrix layer tension 15cN), and then an initial gap of 5-10μm is formed. A3. Anti-static wrapping: Same as Example 1 (wrapping angle 45°, tension 9cN) A4. Heat shrinking and shaping: Key process: 115℃ hot air treatment for 40 seconds, followed by widening the gap by utilizing the difference in thermal shrinkage. Stainless steel microwire shrinkage rate: less than 0.1% (20-200℃) Polyester shrinkage rate: 12.5%, gap widened to 50±5μm.

[0024] The preparation of this antibacterial fiber yarn with antistatic properties requires the following steps: 1. Conductive core layer pretreatment 316L stainless steel microwires are fed at a uniform speed through a micro-tension feeding machine, and the surface is coated with a 0.5μm thick polyurethane isolation layer. Parameters: Coating speed 20m / min, curing temperature 80℃ / 5s (omit this step if using heat shrink gap solution).

[0025] 2. Preparation of antibacterial masterbatch The Y-type molecular sieve silver-loaded antibacterial agent (particle size 1-5μm, silver loading 3.0wt%) was mixed with PET chips at a ratio of 1:9. Melt-blending and granulation via twin-screw extruder; Output: Antibacterial masterbatch (silver content 0.3wt%), particle size φ2×3mm.

[0026] 3. Spinning of antibacterial matrix layer Antibacterial masterbatch was mixed with conventional PET chips at a ratio of 1:4 and spun into FDY filaments using a melt spinning machine. Process: Screw temperature 260℃, winding speed 2800m / min, draw ratio 3.2, fineness 100D; Cutting: The filament is cut into 38mm short fibers.

[0027] 4. Composite twisting molding Using a Siro dual-channel coating machine: Channel A: Conveys pretreated conductive stainless steel microwires (tension 0.5cN); Channel B: Feed in antibacterial short fibers (tension 10cN); Twisted composite: Twist 700T / m, forming an antibacterial matrix layer with a coating gap of 10-50μm.

[0028] 5. Antistatic wrapping layer processing Polyether ester antistatic agent (addition amount 4wt%) was melt-spun with spandex chips to obtain 40D antistatic spandex filaments, which were then spirally wrapped with an antibacterial matrix layer at a 45° wrapping angle using a hollow spindle wrapping machine. Parameters: wrapping tension 9cN, speed 250m / min.

[0029] 6. Heat setting reinforcement The yarn is treated by a hot air setting machine (temperature 120℃, time 30 seconds); This causes the polyester matrix layer to shrink by 5% (if a heat-shrinkable gap solution is used, the gap is expanded to 30-50μm). The spandex wrapping layer shrinks by 15%, and it features a mechanically locked composite structure.

[0030] In summary, the physical isolation layer 4 between the conductive metal core layer 1 and the antibacterial substrate layer 2 fundamentally blocks direct contact between the conductive material and the antibacterial agent. This structure ensures that the silver ion dissolution is stably maintained at an effective antibacterial concentration of 0.8-1.2 ppm, improves the uniformity of the zeolite silver-loaded agent dispersion in the antibacterial substrate layer, and maintains an antibacterial rate of ≥99% against Staphylococcus aureus after 50 washes. Meanwhile, the surface resistance fluctuation of the conductive metal core layer is less than 5%, and the antistatic wrapping layer tightly binds the antibacterial substrate layer with a spiral wrapping angle, replacing the traditional chemical coating. The polyether ester antistatic agent is added to the spandex filament, and combined with the physical pressing effect of the wrapping layer, the antistatic components are difficult to wash off, solving the performance failure problem caused by coating peeling.

[0031] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An antibacterial fiber yarn with antistatic function, characterized in that: The device includes a metal conductive core layer (1), which is composed of stainless steel microwires. The outer wall of the metal conductive core layer (1) is wrapped with an antibacterial matrix layer (2). The antibacterial matrix layer (2) is composed of polyester or nylon short fibers, which are immersed in a silver-loaded zeolite antibacterial agent and twisted. A physical isolation layer (4) is provided between the metal conductive core layer (1) and the antibacterial matrix layer (2). An antistatic wrapping layer (3) is fixedly connected to the outside of the antibacterial matrix layer (2) in a spiral wrapping manner. The antistatic wrapping layer (3) is composed of spandex filaments with added polyether ester antistatic agent.

2. The antibacterial fiber yarn with antistatic function according to claim 1, characterized in that: The physical isolation layer (4) is a polyurethane isolation layer coated on the outside of the metal conductive core layer (1), and the coating thickness of the polyurethane isolation layer is 0.5 μm.

3. The antibacterial fiber yarn with antistatic function according to claim 1, characterized in that: The physical isolation layer (4) is a hollow gap isolation, which is formed by the secondary shrinkage of the antibacterial matrix layer (2) during the post-processing heat setting.

4. The antibacterial fiber yarn with antistatic function according to claim 1, characterized in that: The stainless steel microwire has a diameter of 0.03-0.08 mm, is made of 316L stainless steel, and has a tensile breaking strength ≥3.8 cN / dtex.

5. The antibacterial fiber yarn with antistatic function according to claim 4, characterized in that: The twist of the antibacterial matrix layer (2) is 600-800T / m, the zeolite silver-loaded antibacterial agent is uniformly dispersed by melt spinning masterbatch technology, and the agglomerate size of the zeolite silver-loaded antibacterial agent is ≤2μm.

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