Extrusion/hot pressing processing and laminated layers of continuous carbon fiber/thermoplastic polyurethane knitted composites

Abstract

Extrusion is employed to combine carbon fiber tows and thermoplastic polyurethane (TPU) blend. TPU-cladded carbon fibers undergo knitting to form carbon fiber knitted composites. Microscopic observation proves that the compound carbon fibers are composed of a double-layered structure with interfacial bonding and fiber axial alignment. In addition, the TPU coating can reduce friction during knitting, which provides the carbon fiber knitted composites with flexibility and resilience. Regarding the mechanical properties, the tensile strength is in direct proportion to the number of lamination layers. In particular, sixlayered knitted composites exhibit an optimal tensile strength of 43.72 MPa, whereas four-layered knitted composites exhibit optimal tensile elongation. Through the manufacturing and evaluations in this study, continuous carbon fibers can be fabricated via extrusion, thereby obtaining a knitted structure that can be laminated to strengthen the mechanical properties and electromagnetic interference shielding efficacy of the laminated composites. Large composites can also be achieved, which overcomes the limits of continuous carbon fibers in subsequent production.

Deformation Behavior of Single Carbon Fibers Impregnated with Polysulfone by Polymer Solution Method

“…Injection molding, extrusion, and hot forming are the three most common procedures used to create items made of thermoplastic polymers, which differ from those made of thermosetting matrices in terms of technology [ 19 , 20 , 21 ]. The high viscosity of these polymers’ melts requires the employment of temperatures between 250 and 370 °C and pressures up to 30 bar in order to achieve high-quality impregnation of fiber preforms.…”

Erucamide/thermoplastic polyurethane blend with low coefficient of friction, high elasticity and good mechanical properties for intelligent wearable devices

“…3 The market requirements of intelligent wearable devices promote the development of safe, intelligent wearable materials with comfortable human touch, good tensile and tear strength, and high elasticity. 4 Nowadays, the widely used intelligent wearable materials mainly include polyvinyl chloride, 5,6 thermoplastic elastomer, 7,8 thermoplastic polyurethane (TPU), 9,10 silicone rubber (SiR), 11 fluororubber 12 and TPU/SiR thermoplastic vulcanizate. 13,14 Among these materials, TPU with excellent wear resistance, good mechanical properties, high elasticity, easy processability and good biocompatibility has attracted much attention.…”