Eng. Adrian SALISTEAN, Assoc. Prof., Ph D. Irina CRISTIAN, Assoc. Prof., Ph D. Daniela FARIMA, Lecturer, Ph D. Cristina PIROI
Rezumat
Tesaturile folosite pentru obtinerea parasutelor trebuie sa aiba urmatoarele carcteristici de calitate: masa unitatii de suprafata cat mai redusa in conditiile in care valorile caracteristicilor fizico-mecanice (sarcina la rupere pe directie axiala, alungirea relativa si absoluta, rezistenta la sfasiere a tesaturii si a asamblarilor, permeabilitatea la aer) trebuie sa fie maxime. Nu in ultimul rand materialele trebuie sa corepunda calitativ pe metraje foarte mari si din aceasta cauza reglementarile si standardizarile trebuie sa fie foarte riguroase. Pe plan global nivelul cel mai inalt de standardizare, in domeniul materialelor pentru parasute, a fost cel folosit de armata statelor unite, drept urmare acesta ramane o referinta pentru orice material folosit in prezent chiar daca organismele de standardizare se numesc acum PIA, CEN, ISO si nu MIL. O consecinta a acestui lucru ramane si adoptia unitatiilor de masura imperiale pentru definirea dimensiunilor, fortelor si a altor marimi. Lucrarea enumereaza sintetic materialele de baza folosite in constructia parasutelor, materiale sub forma de tesaturi, chingi, benzi si suspante.
Cuvinte cheie: tesaturi pentru parasutechingi pentru parasutesuspante pentru parasutatextile tehnice.
Abstract
The fabrics used to make parachutes must have the following characteristics: the mass of fabric per unit of surface must be low while the other physical-mechanical characteristics (the axial breaking strength load, the relative and absolute elongation, the tear resistance of the fabric and the assemblies, air permeability) must be at a maximum. On a global scale, the highest level of standardization, in the field of parachute materials, was the one used by the United States Army, so it remains a reference for any material used today, even though the standardization bodies are now called PIA, CEN, ISO and not MIL. A consequence of this remains the adoption of imperial units for measurements of dimensions, forces and other specifications. The paper summarizes the basic materials used in the construction of parachutes, materials in the form of fabrics, webbing, tapes and lines.
Keywords: parachute fabricparachute webbingparachute linestechnical textiles.
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