Spinnbare

Spinnbare is a term used in materials science and textile engineering to denote the ability of a material—typically a polymer melt, solution, or suspension—to be drawn into continuous fibers by spinning processes. The term derives from the German Spinnbar, meaning "able to be spun". In practice, spinnbare behavior depends on rheological properties, molecular weight, chain architecture, crystallinity, solvent quality, temperature, and shear conditions. Materials with sufficient chain mobility and appropriate viscosity form continuous filaments under extrusion or jetting, whereas materials lacking these properties bead, break, or require additives.

Spinnbare is a key criterion in selecting polymers for fiber production. Common spinnbare polymers include PET, nylon, rayon and other cellulose derivatives, as well as certain polyolefins and copolymers. This spinnbare property can be enhanced by adjusting concentration, solvent, and temperature, or by adding plasticizers, chain extenders, or surfactants. Spinning processes used to exploit spinnbare materials include melt spinning, dry spinning, wet spinning, and electrospinning for ultrafine fibers; the chosen method depends on material properties and the end-use.

Testing for spinnbare materials typically involves pilot spinning trials and rheological assessment to identify process windows for defect-free continuous filaments. Limitations arise from thermal degradation, phase separation, or excessive viscosity. Related topics include polymer rheology, spinning technologies, and fiber-reinforced composites.