The fibers are typically heated and stretched in a steam bath, a process called "texturizing," which sets the permanent elastic memory. This step is critical as it determines the final tensile strength, elasticity, and resistance to chemical degradation of the resulting fiber.
Spandex Fabric Performance Properties and Production Process
The specific formulation used creates a segmented block polymer, where hard segments provide the structural strength and rigidity, while soft segments offer the necessary flexibility and resilience. Dyeing and Finishing Processes After the filament is created, it undergoes rigorous post-processing to achieve the desired aesthetic and functional properties.
The prepolymer is dissolved in a solvent, such as N-methyl-2-pyrrolidone (NMP), to create a viscous solution. The raw materials are derived from petrochemicals, and the production process involves potent solvents that require careful handling and disposal.
Spandex Fabric Performance Properties and Production Insights
It is also resistant to perspiration, oils, and dry cleaning solvents, making it ideal for applications where longevity and minimal maintenance are required. This synthetic material is formed through a chemical reaction between a diisocyanate and a diol.
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