Characteristics of
Characteristics of materials for medical use
Properties of fibers depend on their structure especially the original polymer and other technical properties , they also depend on the fiber length , cross section, area, stiffness, wrinkles and surface structure . (54) The major requirements for biomedical polymers are :
Biological properties such as Non-toxicity (non – pyrogenicity, non allergenic respond, non carcinogenesis) the ability to be sterilized, biocompatibility (bioinert, bioactive) , in vivo stability ( chemistry ,size ,shape ) good flexibility ,tenacity , softness ,absorbency as well as the material should be non antigenic, mutagenicity ,tumorigenicity, antignicity, blood compatibility (hemolysis, coagulation ) … (4 )
Mechanical properties such as elasticity, durability, tensile strength, torsional strength, impact strength, ductility, brittleness, creep, and stress propagation
Physiological properties such as formability, wetability, electrical nature (charge, zeta potential, critical surface tension, crystallinity, thermal history and surface structure. (54)
