Cotton,a hydrofilic textile fiber,has unstable characteristics and,for this reason,it varies its properties according to the environment changes.Moisture and temperature are the two most important factors that lead to...Cotton,a hydrofilic textile fiber,has unstable characteristics and,for this reason,it varies its properties according to the environment changes.Moisture and temperature are the two most important factors that lead to a cotton spinning sector and influence its quality.Those two properties can change the entire spinning process.Understanding this,moisture and temperature must be kept under control when used during the spinning process,once the environment is hot and dry,the cotton yarns absorb moisture and lose the minimal consistency.According to this information,this paper was developed testing four types of cotton yarns,one kind of cotton from Brazil and the others from Egypt.The yarns were exposed to different temperatures and moisture in five different tests and in each test,six samples were examined through physical and mechanical tests:resistance,strength,tenacity,yarn’s hairness,yarn’s evenness and yarn’s twisting.All the analyses were accomplished at Laboratório de Mecânica dos Fluidos and at COATS Corrente S.A.,where,it was possible to use the equipments which were fundamental to develop this paper,such as the STATIMAT ME that measures strength,tenacity,Zweigler G566 that measure hairiness in the yarn,a skein machine and a twisting machine.The analysis revealed alterations in the yarn’s characteristics in a direct way,for example,as moisture and temperature were increased,the yarn’s strength,tenacity and hairness were increased as well.Having the results of all analysis,it is possible to say that with a relatively low temperature and a high humidity,cotton yarns have the best performance.展开更多
文摘Cotton,a hydrofilic textile fiber,has unstable characteristics and,for this reason,it varies its properties according to the environment changes.Moisture and temperature are the two most important factors that lead to a cotton spinning sector and influence its quality.Those two properties can change the entire spinning process.Understanding this,moisture and temperature must be kept under control when used during the spinning process,once the environment is hot and dry,the cotton yarns absorb moisture and lose the minimal consistency.According to this information,this paper was developed testing four types of cotton yarns,one kind of cotton from Brazil and the others from Egypt.The yarns were exposed to different temperatures and moisture in five different tests and in each test,six samples were examined through physical and mechanical tests:resistance,strength,tenacity,yarn’s hairness,yarn’s evenness and yarn’s twisting.All the analyses were accomplished at Laboratório de Mecânica dos Fluidos and at COATS Corrente S.A.,where,it was possible to use the equipments which were fundamental to develop this paper,such as the STATIMAT ME that measures strength,tenacity,Zweigler G566 that measure hairiness in the yarn,a skein machine and a twisting machine.The analysis revealed alterations in the yarn’s characteristics in a direct way,for example,as moisture and temperature were increased,the yarn’s strength,tenacity and hairness were increased as well.Having the results of all analysis,it is possible to say that with a relatively low temperature and a high humidity,cotton yarns have the best performance.
