PBT filament yarn is made of PBT resin by melt spinning and stretching,it is an environment-friendlyproduct.Lts molecular structure resembles both polyamide and polyester.Because the chain contains polyester as benzene ring and carboxyl conjugated system,also contains methyl segments similar in
length to nylon,the combination of the two endows PBT fiber with excellent properties of hardness
and softness.Especially outstanding is PBT fiber has superior elasticity after the texturizing processing,
no matter under low load or wet conditions,the molecular energy presents reversible relaxation tension Fabric made of PBT fiber is portable,comfortable and close-fitting,can be compared with spandex fabric.PBT fiber superior characteristics are as follows:
1.PBT yarn’s breaking tenacity is 30.91~35.32cN/tex,breaking elongation is 30%-60%,melting point
is 223 ℃;
2.PBT fiber has superior elasticity ,good durability,dimensional stability,and elasticity is not affected
by humidity;
3.PBT fiber and its products feel soft,moisture absorption and wear resistance and fiber crimp are
good,stretch and compression elasticity are excellent,the elastic recovery rate is better than polyester;
4.Good dyeing ability,can use ordinary disperse dyestuffs to dye under normal pressure in boiling water
without carrier,color is bright and full,color fastness
and chlorine resistance are excellent;
5.Excellent chemical resistance,light resistance and heat resistance.