Composite spinneret, conjugated fiber, and process for manufacturing conjugated fiber
A composite fiber and composite spinneret technology, which is applied in the direction of spinneret assembly, fiber treatment, fiber chemical characteristics, etc., can solve the problems of nanofiber degradation, distance reduction, sea polymer can not be discharged, etc., to achieve easy manufacturing Effect
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Embodiment 1
[0225] A 5.0 PET (hereinafter referred to as "copolymerized PET1", melt viscosity: 140 Pa·s) containing 5-sodium sulfoisophthalate in mol% was melted at 290°C, and then measured and flowed into figure 2 The illustrated spin pack incorporating the composite spinneret 7 of this embodiment melts and discharges a sea-island composite polymer stream. Based on the input polymer mass per unit time, the sea-island polymer ratio is 50 / 50. After cooling and solidifying the discharged composite polymer flow, an oil agent was applied, and it was taken up at a spinning speed of 1500 m / min to obtain an undrawn fiber of 150 dtex-15 filaments (2.25 g / min per hole discharge).
[0226] The coiled undrawn fiber was stretched 3.0 times between rolls heated at 90°C and 130°C to form a 50dtex-15 filament conjugated fiber. Here, using the one used in Example 1 Image 6 The distribution pattern shown is the spinneret. In discharge plate 2, with Figure 28 For the illustrated hexagonal lattice a...
Embodiment 2
[0230] Make Figure 29 The island discharge holes 13 and the sea discharge holes 12 shown in the example form a quadrangular lattice, and the hole filling density is 2.0 (pcs / mm 2 ), in the same manner as in Example 1, using a composite spinneret equipped with a discharge plate that is assembled with a part of the sea island discharge hole group in the form of sandwiching four sea component area formation discharge hole groups, except that Outside, all implement according to embodiment 1. In Example 2, as in Example 1, a sea component region is formed in the composite cross section, thereby having good sea polymer dissolution properties (sea polymer dissolution properties: good), and extremely fine There was little fiber shedding (shedding evaluation: good). Table 1 shows the spinning conditions and the evaluation results of the conjugate fibers and ultrafine fibers.
Embodiment 3
[0232] Such as Figure 30 As shown, the island discharge holes 13 are arranged in a triangular grid, and the sea discharge holes 12 are arranged, and the hole filling density is set to 3.0 (pcs / mm 2 ), in the same manner as in Example 1, using a composite spinneret equipped with a discharge plate that is equipped with a group of discharge holes for forming a sea component area in a form that sandwiches a part of the group of discharge holes for sea islands at 4 places on both sides, except that Except that, all the composite fibers were obtained in the same manner as in Example 1.
[0233] In the cross section of the composite fiber of Example 3, there are Figure 14 The four sea composition regions illustrated in the figure. These sea component regions are directed toward the center from the top, right, bottom, and left of the surface of the fiber when the cross section is observed, but do not enter the center. Its shape is roughly rectangular. In addition, the cross-sect...
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Abstract
Description
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Application Information
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