Composite conductive elasticized yarn

Abstract

The utility model discloses a composite conductive elasticized yarn, which relates to the technical field of textile yarns and comprises a yarn body, the yarn body comprises non-conductive chemical fiber bunchy filament fibers and organic conductive bunchy filament fibers, and after the non-conductive chemical fiber bunchy filament fibers and the organic conductive bunchy filament fibers are stranded through an air network, the non-conductive chemical fiber bunchy filament fibers and the organic conductive bunchy filament fibers are stranded through an air network. And elasticizing by an elasticizer to form a curled structure. According to the utility model, the organic conductive bunchy filament fibers and the non-conductive chemical fiber bunchy filament fibers are combined, so that the surface friction of tows is reduced, the elasticity-enhancing crimp deformation processing of the low-denier conductive fibers is realized, the production state is greatly improved, the subsequent weaving is facilitated, and the production efficiency is improved. The purposes of stable production of the composite conductive elasticizing yarn and small damage to each part of elasticizing equipment are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of textile yarns, in particular to a composite conductive elastic yarn. Background Art

[0002] In the prior art, conductive yarn is generally not used alone. When weaving fabrics for the main purpose of eliminating static electricity, it is woven with other filaments or yarns. According to the actual use requirements, the conductive fiber is 20-40D, and the other filaments or yarns are 50-200D or 100S-32S yarns, including polyester, nylon, cotton yarn or polyester cotton yarn and other fiber materials.

[0003] The FZ / T54124-2020 conductive polyester drawn yarn / polyester drawn yarn blended yarn standard stipulates the standards and requirements for conductive polyester drawn yarn / polyester drawn yarn blended yarn products, which covers the blended yarn formed by the network processing technology of circular cross-section conductive drawn yarn with a total line density of 50dtex~360 dtex and polyester drawn yarn.

[0004] According to the requirements of the anti-static Class A fabric standard, in addition to the charge index, another important index is the surface resistance of the fabric. The existing anti-static fabric weaving method generally uses 20D conductive fiber filament (non-DTY (polyester low elastic yarn) filament) and FDY (fully stretched yarn) filament or DTY filament or yarn to form a composite yarn, and then uses the inlay weaving method to make anti-static fabric. Because it is a straight yarn without curling and deformation, its straight fibers are easily wrapped in the main fibers and cannot be exposed on the surface of the fabric, so that when measuring the surface resistance of the fabric, the anti-static Class A requirements cannot be met. Here, the method of increasing the amount of conductive fiber used is generally adopted, such as increasing the inlay density, increasing the conductive fiber denier, and increasing the fineness of the conductive composite yarn. In short, it is all due to the straight conductive fiber.

[0005] When preparing composite conductive fibers, non-conductive FDY fully stretched filaments or DTY yarns or cotton yarns are directly compounded with conductive fiber filaments. However, the physical indicators of the two or more fibers of the composite fibers are different. For example, when conductive fibers and FDY fully stretched filaments are compounded, due to the difference in elongation, the tension of the two strands of yarn is easily different during compounding, resulting in the problem of ear wires; or unevenness or blistering may occur during the subsequent processing of the fabric, and the conductive fibers may be excessively cold-stretched locally, resulting in the breakage of the conductive layer and the decrease in the conductivity. For example, when non-curled conductive fibers and DTY yarns are compounded, it is always difficult to obtain a coordinated tension control process for the elastic DTY fibers and the straight conductive filaments in the two strands of yarn during compounding, and the above-mentioned various unfavorable production problems may also occur.

[0006] To solve this problem, publication numbers CN107502975B and CN107447283B respectively perform curling and deformation treatment on polyester conductive fiber and nylon conductive fiber. The obtained curled and deformed conductive fiber can be directly used for weaving, or compounded with DTY filament or other yarn, and the obtained product has good compounding effect or weaving effect.

[0007] However, the problem is that the curling process of conductive fibers has strict requirements on the fineness. Since conductive fibers have low strength, it is difficult to process and produce them normally if the fineness is below 40D. Therefore, it is not suitable for low-fineness conductive fibers in actual operation. That is, the commonly used composite conductive filament specifications are 20-40D, and these commonly used conductive filaments cannot be curled and deformed separately to obtain low-denier elastic conductive filaments.

[0008] Moreover, for conductive fibers that meet the denier requirements and can be subjected to curling and deformation processing, especially external conductive fibers, the conductive agent is exposed on the surface of the conductive fibers, and the surface roughness of the conductive fibers is large. Therefore, when producing and processing curling and deformation conductive fibers, it has a great destructive effect on the equipment, especially on the porcelain parts of the guide wire components, showing an effect similar to mechanical wire cutting, affecting production efficiency and product quality. In other words, curling and deformation processing of conductive fibers alone is also very likely to cause instability in the production process.

[0009] The applicant has found through practice that when two POY (pre-oriented yarn) filaments are first compounded into a network mixed fiber yarn and then subjected to a curling and deformation process together to obtain a composite conductive stretch yarn (composite conductive DTY), the curling and deformation processing of low-denier conductive filaments can be achieved, and the curling and deformation processing has good consistency in physical properties, which is particularly suitable for subsequent weaving and improvement of fabric performance. Summary of the invention

[0010] The utility model aims to solve the problem that low-denier conductive yarns are difficult to curl and the conductive fibers are subjected to severe wear on equipment when curled and stretched separately, and to provide a composite conductive stretch yarn that can meet the needs of practical applications.

[0011] In order to achieve the above technical purpose and meet the above technical requirements, the technical solution adopted by the utility model is: a composite conductive elastic yarn, including a yarn body, characterized in that: the yarn body includes non-conductive chemical fiber bundle filament fibers and organic conductive bundle filament fibers, the non-conductive chemical fiber bundle filament fibers and the organic conductive bundle filament fibers are ply-plyed through an air network, and then elasticized by a texturizing machine to form a curled structure, with a curling shrinkage rate of 15-30% and a curling stability of 65-85%.

[0012] Preferably, the non-conductive chemical fiber bundle filaments in the yarn body have a fineness of 30D-250D, and the number of fibers is 15-144; the organic conductive bundle filaments have a fineness of 20-160D, and the number of fibers is 2-50.

[0013] Preferably, the organic conductive bundled filament fibers are conductive fibers produced by a composite spinning process, and the conductive agent of the conductive part is conductive carbon black or conductive metal oxide.

[0014] The composite conductive elastic yarn includes the following manufacturing process steps:

[0015] (1) Preparation of POY raw yarn: It is composed of two or more chemical fiber filaments with a breaking elongation of 40-200%, one of which is polyester conductive POY filament or nylon conductive POY filament, and the rest are polyester or nylon POY filaments;

[0016] (2) The POY raw yarn is combined under set tension and pre-interlaced conditions to obtain interlaced mixed yarn;

[0017] (3) The network blended fiber is subjected to elasticizing and curling deformation processing to prepare a composite conductive elastic yarn.

[0018] The process of adding elasticity to DTY polyester low-elastic yarn is as follows:

[0019] POY composite raw yarn - wire cutter - first roller - deformation hot box - cooling plate - false twister - second roller - shaping hot box - (network nozzle) - third roller - oiling roller - winding roller - winding - grading inspection - packaging and warehousing.

[0020] The process of high elastic yarn texturing is as follows:

[0021] POY composite raw yarn - wire cutter - first roller - deformation hot box - cooling plate - false twister - second roller - (network nozzle) - third roller - oiling roller - winding roller - winding - grading inspection - packaging and warehousing.

[0022] Preferably, the polyester or nylon POY precursor has a fineness of 30-500D, a pore number of 24-288, a strength of 2.5-4.5 cN / dtex, and an elongation at break of 50-150%; the polyester or nylon POY conductive precursor has a fineness of 15-100D, a pore number of 2-32, a strength of 1.8-3.2 cN / dtex, and an elongation at break of 60-150%.

[0023] For the production of conductive fibers, the commonly used process is to produce drawn yarn or nearly drawn yarn, whose elongation at break is about 60%. If there is a further drawing requirement, unstable production is likely to occur. Therefore, in order to realize the present invention, it is necessary to change the existing conductive fiber production process to produce POY conductive yarn with an elongation of 60-150%. Other polyester or nylon POY yarns can be purchased on the market, as long as they are purchased according to the requirements.

[0024] The merging of two fiber filament bundles generally uses an air network for better bonding. In the present application, the more important role of the air network is to embed the conductive fibers into the fiber bundles to reduce damage to the wire guide device.

[0025] By adopting the above technical solution, composite conductive stretch yarn containing 20-40D low-denier conductive fibers can be successfully produced.

[0026] The composite conductive elastic yarn can be applied to high-efficiency antistatic fabrics.

[0027] Compared with the traditional structure, the utility model has the following beneficial effects:

[0028] 1. The utility model combines organic conductive bundled filament fibers and non-conductive chemical fiber bundled filament fibers to reduce the surface friction of the bundles, realizes the elastic curling and deformation processing of low-denier conductive fibers, greatly improves the production state, is beneficial to the subsequent weaving, and achieves the purpose of stable production of composite conductive elastic yarn and less damage to various parts of the elastic equipment. The fabric using the elastic yarn is better in wearing and comfort than the fabric using FDY filaments.

[0029] 2. Since the conductive fibers in the elastic conductive composite fiber of the utility model are curled, they have more opportunities to be exposed on the surface of the fabric, and the contact static elimination effect is better.

[0030] In order to achieve more conductive fibers floating on the surface of the fabric, special fabric design is generally used, or the amount of conductive fibers is increased. Only fabrics with mesh-type conductive fibers exposed on the front can meet the requirements of the new standard A-level fabrics. Conductive blended yarns of the same or similar specifications and the composite conductive elastic yarn product of this application are observed through knitting socks. The color of this product is darker, indicating that its conductive components are more easily exposed evenly on the surface of the fabric. Therefore, for the requirements of the new standard A-level fabrics, the composite conductive elastic yarn of the utility model is more conducive to meeting the requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a schematic diagram of the structure of the utility model;

[0032] Figure 2 This is a schematic diagram of the structure of the composite conductive mixed fiber of comparative example 1. DETAILED DESCRIPTION

[0033] The utility model is further described below.

[0034] Example 1: Production of 30D / 3f polyester conductive POY filament

[0035] The composite spinning production equipment is used, one of the components is PET chips as a non-functional component, and the conductive chips are polyester conductive masterbatch. The process conditions are as follows: the ratio of the two melt components: conductive masterbatch melt 20%, PET chip melt 80%. The moisture content of PET chips is controlled below 40ppm, and the moisture content of conductive masterbatch is controlled below 50ppm. The melt stream ejected from the spinneret is cooled by wind and solidified into nascent fibers, wherein the side blowing wind pressure is 200Pa, the wind speed is 0.5m / s; the wind temperature is 22℃, and the wind humidity is 80%. After the nascent fiber bundle is oiled by a special oil agent through the guide wire, it passes through the tunnel to the winding process, and after the upper and lower guide wire discs change the direction and adjust the tension, it enters the winder and is wound into a silk cake, and the drafting and winding speed is 2800m / min.

[0036] Fiber index: 33dtex / 3f, breaking strength 2.0cN / dtex, elongation 125%.

[0037] Example 2: Production of 26dtex / 3f nylon conductive POY filament

[0038] The composite spinning production equipment is used, one of the components is polyamide PA slices as a non-functional component, and the conductive slices are PA conductive masterbatch. The process conditions are as follows: the ratio of the two melt components: conductive masterbatch melt 20%, PA slice melt 80%. The melt stream ejected from the spinneret is cooled by wind and solidified into nascent fibers, wherein the side blowing wind pressure is 200Pa, the wind speed is 0.45m / s; the wind temperature is 20℃, and the wind humidity is 95%. After the nascent fiber bundle is oiled by a special oil agent through the guide wire, it passes through the tunnel to the winding process, and after the upper and lower guide wire discs change the direction and adjust the tension, it enters the winder and is wound into a silk cake, and the drafting and winding speed is 4500m / min.

[0039] PA conductive POY fiber indicators: 26dtex / 3f, breaking strength 2.4cN / dtex, elongation 64%.

[0040] Example 3: 90D polyester composite conductive stretch yarn (20+70 composite stretch DTY yarn)

[0041] Network blended yarn: 33dtex / 3f polyester POY filament + 125D / 36f polyester semi-dull POY filament prepared in Example 1 are networked and combined under respective tension control, with an air pressure of 2.5 kg.

[0042] Texturing process: D / Y1.85, first hot box temperature 195°C, second hot box temperature 145°C, false twist tension 20cN, draft ratio 1.55, speed 500m / min.

[0043] Composite conductive DTY: 100dtex / 39f, strength 3.7 cN / dtex, elongation at break 22%, high voltage resistance 4.2×10 6 The appearance of the composite conductive DTY yarn is as follows: Figure 1 shown.

[0044] Example 4: Antistatic fabric production and comparison

[0045] The conductive composite elastic yarn is embedded in the warp and weft at a certain interval, and the conductive composite elastic yarn is about 1 cm apart. T / C or CVC raw materials are used to make it more comfortable to wear; the conductive fiber uses permanent composite conductive yarn to ensure the durability of the anti-static performance, such as the 90D polyester composite conductive elastic yarn described in Example 3.

[0046] Warp base material: 12.5tex T / C 65 / 35;

[0047] Weft base material: 12tex T / C 65 / 35;

[0048] Conductive composite yarn: 100dtex polyester composite conductive stretch yarn;

[0049] Effective width of finished product: 150cm;

[0050] Finished product warp and weft density: 115 threads / cm.

[0051] Weave structure: plain weave "X" plus 2 / 2 weft weight weave. The warp and weft weave cycles are 12, and the warp conductive composite yarns are arranged in 12 pieces with 1 every other piece, totaling 13. The arrangement of the conductive composite yarn differs from the weave cycle by one piece.

[0052] Actual results: The actual test result of the point-to-point resistance of the finished fabric is: 6.1×10 6 .

[0053] Example 5: Antistatic knitted fabric

[0054] Raw material: 11tex polyester-cotton (65 / 35) blended yarn is used to weave the base fabric.

[0055] The conductive fiber adopts the 90D polyester composite conductive stretch yarn described in Example 3.

[0056] Weaving equipment: single-sided circular knitting machine, cylinder diameter 762mm; machine gauge 24 needles / 25.4mmm; number of threads 96F.

[0057] Weaving method: polyester-cotton blended yarn is used as the basic fabric, and the composite conductive DTY yarn is knitted into the fabric with a spacing of 1cm.

[0058] Actual result: The actual test result of the point-to-point resistance of the knitted fabric is: 7.1×10 6 .

[0059] Comparative Example 1: Using the same weaving method, the conductive FDY filaments are directly twisted (composite conductive mixed fiber yarn, the appearance is as shown in the figure Figure 2 As shown in the figure), specifically, 20D / 3f conductive FDY filament + 80dtex FDY / 36f filament composite network yarn, the actual test result of the point-to-point resistance of the finished fabric is: 5.1×10 7 , although it meets the requirements of the new standard, the point-to-point resistance is high.

[0060] Comparative Example 2: With the same weaving method, the amount of conductive yarn is increased, 40D conductive FDY filament + 80dtex FDY filament network is spun into mixed yarn, and the actual test result of the point-to-point resistance of the finished fabric is: 8×10 6 .

[0061] The above embodiments of the present invention are merely examples to clearly illustrate the present invention, but are not intended to limit the protection scope of the present invention. All equivalent technical solutions also belong to the scope of the present invention. The patent protection scope of the present invention should be defined by the claims.

Claims

1. A composite conductive elastic yarn, comprising a yarn body, characterized in that: The yarn body comprises non-conductive chemical fiber bundle filament fibers and organic conductive bundle filament fibers. After the non-conductive chemical fiber bundle filament fibers and the organic conductive bundle filament fibers are twisted through an air network, they are twisted by a texturing machine to form a curling structure, with a curling shrinkage rate of 15-30% and a curling stability of 65-85%.

2. The composite conductive elastic yarn according to claim 1, characterized in that: The non-conductive chemical fiber bundle filament fiber in the yarn body has a fineness of 30D-250D and a root number of 15-144; the organic conductive bundle filament fiber has a fineness of 20-160D and a root number of 2-50.

3. The composite conductive elastic yarn according to claim 1, characterized in that: The organic conductive bundled filament fibers are conductive fibers produced by a composite spinning process, and the conductive agent of the conductive part is conductive carbon black or conductive metal oxide.

4. The composite conductive elastic yarn according to claim 1, characterized in that: The breaking elongation of the non-conductive chemical fiber bundle filament fibers and the organic conductive bundle filament fibers is 40-200%.

Images