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CN-122026190-A - Connection method of flexible lead and flexible conductive connecting piece

CN122026190ACN 122026190 ACN122026190 ACN 122026190ACN-122026190-A

Abstract

The invention provides a connection method of a flexible wire and a flexible conductive connecting piece. The flexible conductive connecting piece comprises a flexible polymer wire, a flexible conductive ring and a flexible insulating ring, wherein the flexible conductive ring is sleeved on the periphery of the flexible polymer wire along the length direction of the flexible polymer wire, the flexible insulating ring is sleeved on the periphery of the flexible conductive ring, the periphery of one end of the flexible conductive ring is kept exposed, the end is denoted as an end A, when the flexible conductive connecting piece is connected with the flexible conductive wire, the end A of the flexible conductive ring stretches into the flexible conductive wire, the exposed periphery of the flexible conductive ring is contacted with the liquid metal, the conductive connection with the flexible conductive wire is ensured, and the flexible conductive wire has flexibility and stable performance and has wide application prospect in a flexible electronic technology.

Inventors

  • SUN DANDAN
  • WU ZHENGUANG

Assignees

  • 宁波韧和科技有限公司

Dates

Publication Date
20260512
Application Date
20200818

Claims (10)

  1. 1. The method for connecting the flexible wire and the flexible conductive connecting piece is characterized in that the flexible wire is formed by filling liquid metal in a flexible pipe, and the method is characterized in that: The flexible conductive connecting piece comprises a flexible polymer wire, a flexible conductive ring and a flexible insulating ring, wherein the flexible conductive ring is sleeved on the periphery of the flexible polymer wire along the length direction of the flexible polymer wire, the flexible insulating ring is sleeved on the periphery of the flexible conductive ring, the periphery of one end of the flexible conductive ring is kept exposed, and the end is marked as an end A; When the flexible conductive connecting piece is connected with the flexible conducting wire, the end A of the flexible conductive ring stretches into the flexible conducting wire, and the exposed periphery of the flexible conductive ring is contacted with the liquid metal to form conductive connection.
  2. 2. The method of claim 1, wherein the flexible conductive connector is connected to the flexible conductive wire by one or more of bonding, stitching, riveting, plugging, and snapping.
  3. 3. The method of claim 1, wherein the flexible conductive connector is fixedly connected to the flexible conductive wire by a flexible fixing layer.
  4. 4. The method of claim 3, wherein the flexible fixing layer material comprises one or more of glue, silica gel, polyurethane, polypropylene, polyethylene, epoxy resin, and polylactic acid.
  5. 5. The method of claim 1, wherein the flexible polymer yarn is made of a flexible polymer material, and the flexible polymer material comprises one or more of latex, silica gel, polyurethane, polyethylene, polypropylene, polyimide, polyester, polylactic acid, polydimethylsiloxane, polyvinyl alcohol material or a composite material based on the latex, the silica gel, the polyurethane, the polypropylene, the polyimide, the polyester, the polylactic acid, the polydimethylsiloxane, the polyvinyl alcohol, the hydrogenated styrene-butadiene block copolymer, the polydimethylsiloxane, the polyethylene oxide, the aliphatic aromatic random copolyester, the natural rubber and the synthetic rubber.
  6. 6. The method of claim 1, wherein the method of manufacturing the flexible conductive connector comprises the steps of: (1) Attaching a layer of treatment agent I on the periphery of the flexible polymer wire, and then wrapping the flexible conductive layer; (2) Attaching a layer of treating agent II to the periphery of the conductive layer obtained in the step (1), and then wrapping the flexible insulating layer; (3) And (3) removing the end A of the flexible insulating layer obtained in the step (2) to expose the outer periphery of the flexible conductive layer at the end.
  7. 7. The method of claim 6, wherein the flexible conductive layer comprises a metal film material, a composite of one or more of metal nanoparticles, graphene, carbon nanotubes, graphite, liquid metal, conductive paste, conductive gel, conductive silver paste, and conductive composites thereof with silica gel, polyurethane, polypropylene, polyimide, polyesters, polylactic acid, polyvinyl alcohol, hydrogenated styrene-butadiene block copolymer, polydimethylsiloxane, polyethylene oxide, aliphatic aromatic random copolyester, natural rubber, and synthetic rubber.
  8. 8. The method of claim 6, wherein the flexible insulating layer comprises one or more of silica gel, polyurethane, polypropylene, polyvinyl chloride, polyimide, polyester, polylactic acid, polydimethylsiloxane, polyvinyl alcohol, hydrogenated styrene-butadiene block copolymer, natural rubber, synthetic rubber, and a composite material based thereon.
  9. 9. The method according to claim 6, wherein at least one of the following conditions (one) to (four) is satisfied: the treating agent I comprises a solution of a surfactant, an organic solvent and one or more of plasma, oxygen, ozone and chlorine materials; (II) the treating agent II comprises a solution of a surfactant, an organic solvent and one or more of plasma, oxygen, ozone and chlorine materials; The attachment mode in the step (1) and the step (2) comprises one or more of soaking, dipping, knife coating, chemical growth, coating and rinsing; and (IV) the wrapping mode in the step (1) and the step (2) comprises one or more of soaking, dipping, knife coating, chemical growth, coating and rinsing.
  10. 10. The method of claim 6, wherein the removing of the flexible insulating layer in step (3) comprises physical and/or chemical means.

Description

Connection method of flexible lead and flexible conductive connecting piece The application is a divisional application of the following patent application: application number 202010829194.1 Application day of 2020, 8 months and 18 days The invention provides a flexible conductive connecting piece of a flexible lead and a preparation method thereof Technical Field The invention relates to the technical field of flexible electronics, in particular to a connection method of a flexible wire and a flexible conductive connecting piece. Background With the development of flexible electronics and wearable equipment, flexible wires are receiving more and more attention due to the stretchability and comfort of the flexible wires, and the flexible wires have wide application prospects in the fields of human-computer interaction, human health/motion monitoring, intelligent clothing and the like. At present, the flexible wire is mainly three kinds of (1) a flexible wire woven by directly using conductive yarns, conductive fibers and the like, has low conductivity and is not resistant to kneading and washing, (2) a flexible wire wound into a spring wire and other forms by using a traditional copper wire, has an insufficiently compact structure and poor touch, (3) a flexible wire formed by filling a flexible tube with liquid metal, ionic liquid and the like, has good conductivity and flexibility, but cannot be connected with an external unit to achieve good conductivity, softness and stability, (4) a conductive polymer compounded by conductive silver paste, conductive gel, conductive filler and the like and a polymer is used as the flexible wire, and is not resistant to bending, poor in tensile stability or poor in conductivity. In comparison, the (3) flexible lead has better conductivity and flexibility and application prospect. At present, two main connecting methods exist for connecting the flexible wire with the external conductive unit: (1) The method introduces a rigid electrode, thereby damaging the flexibility of a liquid metal wire and causing uncomfortable use feeling; (2) The conductive adhesive is used for filling, sealing and connecting, but the conductive adhesive has poor conductivity and cannot meet the use environment with high requirements on conductivity. Therefore, how to conduct and connect the flexible lead and the outside makes the connection part have important significance for realizing the fully flexible conductor while taking good conductivity, softness and stability into consideration. Disclosure of Invention The invention provides a connecting piece aiming at a flexible wire based on liquid metal, which can realize good conductive connection with the flexible wire, has good flexibility and stability and forms a full-flexible structure with the flexible wire. The technical scheme provided by the invention is that the flexible conductive connecting piece of the flexible wire comprises liquid metal and is characterized in that: The flexible conductive connecting piece comprises a flexible polymer wire, a flexible conductive ring and a flexible insulating ring, wherein the conductive ring is sleeved on the periphery of the flexible polymer wire along the length direction of the polymer wire, the flexible insulating ring is sleeved on the periphery of the flexible conductive ring, the periphery of one end of the flexible conductive ring is kept exposed, and the end is marked as an end A; When the flexible conductive connecting piece is connected with the flexible wire, the flexible conductive connecting piece and the flexible wire are fixedly connected, the end A of the flexible conductive ring stretches into the flexible wire, and the exposed periphery of the flexible conductive ring is contacted with the liquid metal to form conductive connection. The fixed connection mode is not limited, and comprises bonding, sewing, riveting, inserting and pulling, buckling and the like at the contact part, or the two are fixedly connected together through a flexible fixing layer. The fixing layer is made of materials with an adhesive effect, including but not limited to one or more of glue, silica gel, polyurethane, polypropylene, polyethylene, epoxy resin, polylactic acid and the like. The invention also provides a method for preparing the flexible conductive connecting piece, which comprises the following steps: (1) Attaching a layer of treating agent I on the periphery of the flexible polymer wire, then wrapping a conductive layer, and heating and curing; (2) Attaching a layer of treating agent II to the periphery of the conductive layer obtained in the step (1), and then wrapping the flexible insulating layer; (3) And (3) removing the end A of the flexible insulating layer obtained in the step (2) to expose the conductive layer at the end. The flexible polymer yarn is made of flexible polymer materials, is linear or filiform and has a certain supporting function. The flexible polymer material includes, b