An electrically conductive vortex spun yarn

Abstract

The utility model discloses a kind of electrically conductive eddy current spun yarn, comprising: the yarn main body spun by eddy current spinning, yarn main body includes core yarn, first cladding layer and second cladding layer, first cladding layer is coated in the outside of core yarn, second cladding layer is coated in the outside of first cladding layer;Core yarn is conductive filament, first cladding layer is conductive fiber layer, and second cladding layer is flame-retardant conductive fiber layer.Based on the utility model electrically conductive eddy current spun yarn, from core yarn to outer layer are integrated into conductive material, make yarn main body have stable conductive property, can directly provide key material support for intelligent wearable textile preparation, satisfy the basic requirement of wearable device to conductive yarn;The outermost layer of yarn is flame-retardant conductive fiber layer, has the double characteristics of flame-retardant and conductive, while further strengthening yarn conductive effect, can effectively improve the flame-retardant property of yarn, avoid wearable textile to cause combustion risk due to circuit heating and other problems, improve the use safety of intelligent wearable product.

Description

Technical Field

[0001] This utility model relates to a conductive eddy current spun yarn, belonging to the field of eddy current spinning technology. Background Technology

[0002] Vortex spinning is a new type of spinning technology that uses high-speed rotating airflow to achieve fiber cohesion and twisting into yarn. It can directly spin cotton sliver into cone yarn, eliminating the roving and winding processes, thus improving production efficiency. In addition, the spun yarn has less surface hair and strong abrasion resistance, making it suitable for making functional textiles.

[0003] However, the eddy current spun yarns currently on the market are usually insulating materials and generally do not have conductive properties, so they cannot be directly used in the field of smart wearables. Good conductivity is a basic requirement for the preparation of wearable devices. Among them, conductive yarns are widely used in the field of smart wearables. Weaving them into fabrics can endow the fabrics with sensing and information processing functions. Therefore, this application provides a conductive eddy current spun yarn. Utility Model Content

[0004] The purpose of this invention is to provide a conductive eddy current spun yarn, which is designed to have a conductive effect and can prepare for the subsequent preparation of smart wearable textiles.

[0005] To solve the above-mentioned technical problems, the purpose of this utility model is achieved as follows: a conductive eddy current spun yarn, comprising: a yarn body spun by eddy current spinning, the yarn body comprising a core yarn, a first covering layer and a second covering layer, the first covering layer covering the outside of the core yarn, and the second covering layer covering the outside of the first covering layer; the core yarn is a conductive filament, the first covering layer is a conductive fiber layer, and the second covering layer is a flame-retardant conductive fiber layer.

[0006] Based on the above scheme and as a preferred embodiment of the above scheme: the conductive filament is an inner trilobal polyester-based composite conductive filament.

[0007] Based on the above scheme and as a preferred embodiment of the above scheme: the conductive fiber layer is a biomass graphene viscose fiber layer.

[0008] Based on the above scheme and as a preferred embodiment of the above scheme: the flame-retardant conductive fiber layer is a polyaniline flame-retardant polyester conductive fiber layer.

[0009] Based on the above scheme and as a preferred embodiment of the above scheme: the flame-retardant conductive fiber layer is a meta-aramid-based conductive short fiber layer.

[0010] The beneficial effects of this invention are as follows: Based on the conductive eddy current spun yarn of this invention, conductive materials are incorporated from the core yarn to the outer layer, giving the yarn body stable conductive properties. This can directly provide key material support for the preparation of smart wearable textiles, meeting the basic requirements of wearable devices for conductive yarns. The outermost layer of the yarn is a flame-retardant conductive fiber layer, which has both flame-retardant and conductive properties. While further enhancing the conductive effect of the yarn, it can effectively improve the flame-retardant properties of the yarn, avoiding the risk of combustion caused by circuit heating and other problems in wearable textiles, and greatly improving the safety of smart wearable products. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the cross-sectional structure of the conductive eddy current spun yarn involved in this utility model; In the diagram: 1-core yarn, 2-first covering layer, 3-second covering layer. Detailed Implementation

[0012] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0013] Example 1 Combination Figure 1 This embodiment will be described in detail. A conductive eddy current spun yarn includes: a yarn body spun by eddy current spinning, the yarn body including a core yarn 1, a first covering layer 2 and a second covering layer 3, the first covering layer 2 covering the outside of the core yarn 1, and the second covering layer 3 covering the outside of the first covering layer 2; the core yarn 1 is a conductive filament, the first covering layer 2 is a conductive fiber layer, and the second covering layer 3 is a flame-retardant conductive fiber layer.

[0014] Furthermore, the conductive filament is an inner trilobal polyester-based composite conductive filament. The inner trilobal polyester-based composite conductive filament is prepared by composite spinning using polyethylene terephthalate (PET) chips as the outer layer and a self-made nylon conductive masterbatch as the core layer, through the design of an inner trilobal microporous structure in the spinneret. Specifically, the PET chips have an intrinsic viscosity of 0.65 dL / g, the nylon conductive masterbatch has a melt flow index of 15 g per 10 min, and the nylon conductive masterbatch has a mass fraction of 12%. The resulting inner trilobal polyester-based composite conductive filament exhibits good spinnability, a clear inner trilobal shape in the fiber cross-section, and good mechanical and electrical properties, with a breaking strength of 3.0 cN / dtex, a breaking elongation of 63.0%, and a surface resistivity of 10 Ω·cm. 9 Ω. The inner trilobal polyester-based composite conductive filament introduces surface charge into its unique inner trilobal core layer. The radius of curvature at the tip of the inner trilobal is very small, and the electric field is easily concentrated at the tip, forming a non-uniform electric field. This continuously generates a weak tip discharge phenomenon, constantly dissipating the surface charge, thereby achieving good conductivity and electrostatic protection.

[0015] Furthermore, the conductive fiber layer is a biomass graphene viscose fiber layer. Biomass graphene viscose fiber is produced by uniformly dispersing biomass graphene into a treated viscose spinning solution, filtering the solution through a spinning machine filter, and then subjecting the spinning solution to wet spinning via a metering pump. Compared to ordinary viscose fiber, biomass graphene viscose fiber has a more uneven surface with irregular protrusions, which increases both the specific surface area and the frictional force of the fiber. The resistivity of biomass graphene viscose fiber and ordinary viscose fiber are 4.03 × 10⁻⁶ and 4.03 × 10⁻⁶, respectively. 9 and 6.09×10 9 Ω·g / cm 2 The former has a significantly lower resistivity than the latter. This is because biomass graphene itself is a good conductive material. The addition of biomass graphene can effectively increase the conductivity of the fiber. The addition of biomass graphene reduces the crystallinity of the fiber, reduces the size of the grains, and makes the structure more loose, which reduces the resistivity of the fiber and enhances its conductivity. The tensile properties of biomass graphene viscose fiber are lower than those of ordinary viscose fiber, while the coefficient of friction, conductivity, and moisture regain are all increased.

[0016] Furthermore, the flame-retardant conductive fiber layer is a polyaniline flame-retardant polyester conductive fiber layer. The polyaniline flame-retardant polyester conductive fiber is produced by first subjecting the flame-retardant polyester to an alkali reduction treatment in a sodium hydroxide solution. The alkali reduction treatment conditions are: temperature 80℃, alkali concentration 5%, treatment time 15-20 minutes. Then, the alkali-reduced flame-retardant polyester is pre-soaked in an aniline solution for 1 hour to allow the fiber to fully adsorb aniline monomers. Then, an oxidant, ammonium persulfate, is added, and the reaction is carried out at a low temperature of -20℃ for a certain time to polymerize aniline on the fiber surface to form polyaniline. The flame-retardant polyester has permanent flame retardancy, contains no halogens, and only contains carbon, hydrogen, oxygen, and a small amount of phosphorus. Compared with traditional fibers containing halogenated flame retardants, the flame-retardant polyester does not produce asphyxiating toxic gases during combustion, has a limiting oxygen index of 30%, and features low smoke emission, good flame retardant effect, good thermal stability, and non-toxicity. In the structure of polyaniline flame-retardant polyester conductive fiber, the flame-retardant polyester provides mechanical support and is the skeleton of the entire fiber, while polyaniline acts as a conductive layer.

[0017] Example 2 The difference from Example 1 is that the flame-retardant conductive fiber layer is a meta-aramid-based conductive short fiber layer. The average moisture regain of the meta-aramid-based conductive short fiber is 4.24%, which is higher than that of ordinary chemical fibers, indicating that it has certain moisture absorption properties. Since water is a good conductor of electricity, a high moisture regain helps to improve the antistatic properties of this fiber. The meta-aramid-based conductive short fiber has a smooth and bright longitudinal and transverse surface with good continuity. The surface has some obvious continuous grooves, which can prevent the accumulation of charge and facilitate the conduction of charge. The meta-aramid-based conductive short fiber has good flame retardancy and will not melt or drip after combustion treatment, nor will it release any special odor.

[0018] The preferred embodiments of this utility model have been described in detail above. It should be understood that those skilled in the art can make numerous modifications and variations based on the concept of this utility model without creative effort. Therefore, all technical solutions that can be obtained by those skilled in the art based on the concept of this utility model through logical analysis, reasoning, or limited experimentation on the basis of existing technology should be within the scope of protection defined by the claims.

Claims

1. A conductive eddy current spun yarn, characterized in that, include: The yarn body produced by vortex spinning includes a core yarn (1), a first covering layer (2) and a second covering layer (3). The first covering layer (2) covers the outside of the core yarn (1), and the second covering layer (3) covers the outside of the first covering layer (2). The core yarn (1) is a conductive filament, the first covering layer (2) is a conductive fiber layer, and the second covering layer (3) is a flame-retardant conductive fiber layer.

2. The conductive eddy current spun yarn according to claim 1, characterized in that, The conductive filament is an inner trilobal polyester-based composite conductive filament.

3. The conductive eddy current spun yarn according to claim 1, characterized in that, The conductive fiber layer is a biomass graphene viscose fiber layer.

4. The conductive eddy current spun yarn according to claim 1, characterized in that, The flame-retardant conductive fiber layer is a polyaniline flame-retardant polyester conductive fiber layer.

5. A conductive eddy current spun yarn according to claim 1, characterized in that, The flame-retardant conductive fiber layer is a meta-aramid-based conductive short fiber layer.

Images