Hollevezel

Hollevezel is a fiber with a hollow core running along its length. The hollow geometry can take the form of a single bore or multiple microchannels, creating a tube-like structure. This design lowers the fiber’s density and increases loft and warmth while keeping the weight light. Hollevezels are produced from various polymers, most commonly synthetic polymers such as polyester and nylon, but can be based on different polymer systems or blends.

Manufacturing typically involves extrusion through a hollow spinneret, sometimes with the introduction of a gaseous core or by using bicomponent solutions to form the hollow bore during coagulation or evaporation. The resulting hollow structure provides enhanced insulation, bulk, and compressibility compared with solid fibers. Some hollow fibers have a single central bore, while others feature multiple voids to improve thermal performance and resilience.

Applications of hollevezels are widespread in both textiles and technical fields. In consumer textiles, they are used to add warmth and bulk to jackets, quilts, sleeping bags, and padding, delivering a high warmth-to-weight ratio. In home furnishings and bedding, hollow fibers contribute to softness and insulation. In technical and industrial contexts, hollow-fiber concepts underpin filtration membranes and medical devices, where the hollow geometry offers a high surface area and efficient flow pathways.

Advantages of hollevezels include superior insulation with low weight, good loft and compressibility, and versatile processing. Limitations can include lower tensile strength and abrasion resistance compared with some solid fibers, as well as higher production costs and specific care requirements.