The invention relates to a process for producing a
polyester industrial long
fiber for
processing a
safe air bag of an automobile, which sequentially comprises the following steps: A.
processing a
polyester slice with high
viscosity: enabling the
viscosity of the
polyester slice to reach 1.0-1.1dl / g; B. melting and
spinning: transmitting the polyester slice after
solid phase
polymerization to a
spinning screw rod extruder, melting in a
spinning screw rod, entering a spinning
assembly by a
metering pump and extruding from a
fiber spray plate with a
diameter of 190 mm to 220 mm to spin fusant, , then heating by a
slow cooling heater, carrying out cooling for molding by a side-molding blowing device and then entering a spinning passage; C. stretching and winding: oiling the surface of a
fiber and carrying out second-grade high-speed stretching with the total stretching multiple being 5.0 to 5.8, carrying out high-temperature loosing
thermoforming at 230 DEG C-250 DEG C and carrying out winding for molding in the range of the winding process speed of 2,500-3,000 m / min to prepare a finished product. The fiber for the
safe air bag, which is produced by the process, can completely replace a nylon 66 fiber, is used for spinning terylene
safe air bag fabrics and greatly reduces the
processing cost.