Organic composite conductive fiber is a kind of fiber with certain conductivity, which is composed of conventional synthetic fiber polymer and conductive component. The conductive component of organic composite conductive fiber is a kind of material similar to masterbatch, which is made by mixing a large number of conductive substances into the polymer of conventional synthetic fiber.
The main varieties of organic composite conductive fibers are nylon based, polyester based, acrylic based, polypropylene based and other organic composite conductive fibers, of which nylon based organic conductive fibers are most widely used. Recently, a new type of organic composite conductive fiber, aramid - based composite conductive fiber, was initiated and produced by Shandong Taihe Group. Its trade name is tamtar conductive fiber.
The structure of organic composite conductive fiber includes: skin type (that is, the cortex is the conductive layer, and the core layer is the common polymer), three leaf type, parallel type, one shape, core type (that is, the core layer is the conductive layer, and the cortex is the common polymer), island type, etc
Comprehensive comparison of several conductive fibers with different structures:
① Leather type: good conductivity, general strength, poor durability;
② One shape: slightly poor conductivity, good strength and durability;
③ Three leaf type: good conductivity, strong strength and durability;
④ Core type: poor conductivity, good strength and durability;
Note: Because carbon black shows black in the fabric, only core conductive fibers can be used in light colored fabrics except in special cases.
Composition and function of conductive components:
Base material - the base material or basic polymer. Function: the conductive particles are firmly bonded together, so that the conductive components have both stable conductivity and machinability.
Filler - i.e. conductive material. Function: conductive particles provide carriers in conductive components.
Compatibility of basic polymers with conductive particles:
The properties of the two materials are quite different, so it is not easy to combine them closely when they are compounded, and it is difficult to disperse them evenly, which affects the conductivity of the materials. Therefore, the surface treatment of conductive particles is usually needed. For example, surfactant, coupling agent and redox agent are used to treat the conductive particles in order to improve their dispersion and tight binding, that is, the compatibility of materials.
