Stretching occurs because the velocity of the filament extruded from the spinneret is lower than the moving speed of the winding device, i.e., the stretching speed is higher than the spinning speed, causing the diameter of the as-spun fiber to be smaller than that of the spinneret orifice. In chemical fiber production, stretching can be carried out continuously following the spinning process, or separately from the spinning process using wound yarn or as-spun fibers pre-wound on bobbins or in silk cans.

Technical Definition and Core PrinciplesSolventless lamination is a production process that bonds two or more base materials (such as plastic films, aluminum foil, and paper) using 100% solid adhesives. Its core breakthrough lies in completely eliminating organic solvents. Materials like polyurethan

Industry Background and Technical PositioningAs a key equipment in modern manufacturing, coating machines have become core production tools in fields such as printing and packaging, new energy electronics, medical materials, and construction. They achieve this by precisely applying coatings, adhesiv

In modern industry and daily life, there is a material that seems unremarkable yet plays a pivotal role — barrier film. Like a silent invisible guardian, it relies on its special properties to protect the quality and shelf life of numerous products. As the name suggests, a barrier film is a type of

The main component of thermosetting plastics is linear or branched low-molecular-weight polymers, with reactive functional groups on the molecular chains. Therefore, during the heat-induced molding process, thermosetting plastics undergo not only physical state changes but also irreversible chemical