Crimped polyester fiber and fibrous structure comprising the same
A polyester fiber and fiber structure technology, applied in the field of fiber structure, can solve problems such as high crimp rate, insufficient bulkiness and compression durability, and insufficient bulkiness of fiber products
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Embodiment 1
[0051] Polytrimethylene terephthalate (intrinsic viscosity 0.85, melting point 225° C.) was used and melted at 260° C., and filaments were extruded from a known hollow circular cross-section spinneret (150 holes) at a discharge rate of 480 g / min. At the position 1.5-15cm below the spinneret surface, blow the quenching air at 25°C at a flow rate of 1.5m / s from one side of the filament at an angle perpendicular to the direction of travel of the filament, and blow it at a coil of 1200m / min Take the speed to obtain undrawn yarn. Then, the obtained undrawn yarn was made into a tow of 500,000 dtex, and then stretched 2.46 times by a two-stage hot water drawing method at 70°C×90°C. The drawn yarn was crimped by a stuffer crimper, cut into 64 mm long fibers, and subjected to relaxation heat shrinkage treatment at 135° C. to obtain helically three-dimensional crimped fibers having a hollow ratio of 15%. The obtained crimped fiber is made into a web by a carding machine, shaped into a ...
Embodiment 2 to 4 and comparative example 1 and 2
[0052] Except that the number of crimps and the crimp rate were changed as shown in Table 1 by adjusting the flow rate of the quenching air, the same process as in Example 1 was carried out to make a futon fiber filler and measure its performance. The results are shown in Table 1. Comparative example 3
Embodiment 6 and 7
[0059] In addition to making the cross-sectional area ratio of component E (sheath) / component P (core) in the thermally adhesive composite fiber, or the ratio of thermally bondable composite staple fiber / polytrimethylene terephthalate staple fiber in the fiber structure Except that the mixing ratio was changed as shown in Table 2, the same treatment as in Example 5 was carried out to obtain a fiber structure. Table 2 shows the results of evaluating the fiber structure.
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