Composite spinneret and method of manufacturing composite fiber

A composite spinneret and polymer technology, applied in spinneret assemblies, fiber processing, textiles and papermaking, etc., can solve the problems of not being able to reach the nanometer level, the spacing between holes becomes larger, and the equipment cost is large, and it can prevent confluence. , the effect of high dimensional stability

Active Publication Date: 2013-08-21
TORAY IND INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0020] However, since the groove processing is performed around the island component discharge hole 1 and the discharge hole 25, the pitch between the holes becomes large, and the hole filling density cannot be sufficiently increased, making it difficult to manufacture ultra-fine fibers with a fiber diameter of nanometer order. Happening
As described in

Method used

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  • Composite spinneret and method of manufacturing composite fiber
  • Composite spinneret and method of manufacturing composite fiber
  • Composite spinneret and method of manufacturing composite fiber

Examples

Experimental program
Comparison scheme
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Example Embodiment

[0268] [Example 1]

[0269] Polyethylene terephthalate (PET melt viscosity: 120 Pa·s) having an intrinsic viscosity (IV) of 0.63 dl / g as an island component and 5 having an IV of 0.58 dl / g as a sea component polymer - PET (copolymerized PET melt viscosity: 140 Pa·s) copolymerized with sodium sulfonate isophthalic acid 5.0 mol% was melted at 290°C, respectively, and then measured and flowed into the assembly. Image 6 In the spinning package of the composite spinneret of the present embodiment shown, the sea-island composite polymer flow is discharged from the discharge hole of the spinneret. In addition, on the lowermost distribution plate, 1000 island component discharge holes were perforated at equal intervals for one discharge introduction hole for the island component polymer. The sea-island ratio was 50 / 50. The discharged composite polymer stream was cooled and solidified, oil was added, and it was wound up at a spinning speed of 1500 m / min to obtain an unstretched fiber...

Example Embodiment

[0271] [Example 2]

[0272] like figure 2 As shown, the same composite spinneret as in Example 1 was used, except that the arrangement of the island component discharge holes and the sea component discharge holes of the lowermost distribution plate was changed to Condition B of (2), and the island component polymer ratios were Except that Example 1 was large (the sea-island ratio was set to 20 / 80), the same polymer, the same fineness, and spinning conditions were spun as in Example 1, and 13,500 multifilaments were obtained.

[0273] Here, in the composite spinneret used in Example 2, the radius R1 of the imaginary circumferential line C1 was 0.4 mm, the radius R2 of the imaginary circumferential line C2 was 0.8 mm, and the radius R4 of the imaginary circumferential line C4 was 0.8 mm. An island component discharge hole and a sea component discharge hole with a hole diameter of 0.2 mm were provided. As described in Table 1, the island component has a triangular cross-sectio...

Example Embodiment

[0274] [Example 3]

[0275] like image 3 As shown, the same composite spinneret as in Example 1 was used, except that the arrangement of the island component discharge holes and the sea component discharge holes of the lowermost distribution plate was changed to Condition C of (2), except that the sea-island ratio was Other than 20 / 80, spinning was carried out with the same polymer, the same fineness, and spinning conditions as in Example 1, and 15,000 multifilaments were obtained.

[0276] Here, in the composite spinneret used in Example 3, the radius R1 of the imaginary circumferential line C1 was 0.4 mm, the radius R2 of the imaginary circumferential line C2 was 0.8 mm, and the radius R4 of the imaginary circumferential line C4 was 0.693 mm. An island component discharge hole and a sea component discharge hole with a hole diameter of 0.2 mm were provided. As described in Table 1, the island component has a hexagonal cross section (angle of intersection of the straight li...

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Abstract

Provided is a composite spinneret for the manufacture of islands-in-the-sea composite fibers, whereby the island component polymer streams can be prevented from converging while the hole packing density of the extrusion holes for the island component polymer is expanded, and whereby various fiber cross sections, and particularly heteromorphic cross sections, can be formed with high accuracy, while maintaining high dimensional stability of the cross section. The present invention provides a composite spinneret for extruding composite polymer streams composed of an island component polymer and a sea component polymer, the composite spinneret being characterized by being composed of one or more distribution plates in which are formed distribution holes and distribution grooves for distributing the polymer components; and a lowermost layer distribution plate positioned to the downstream side of the distribution plate in the direction of the polymer spinning path, and having formed therein a plurality of island component extrusion holes and a plurality of sea component extrusion holes. The present invention is also characterized in that some of the sea component extrusion holes are arranged on a virtual circular line (C1) of radius (R1) centered on the island component extrusion holes, some of the sea component extrusion holes are arranged on a virtual circular line (C2) of radius (R2), and some of the island component extrusion holes are arranged on a virtual circular line (C4) of radius (R4) according to a predetermined arrangement while satisfying the expression (1) R2>=R4>=3*R1.

Description

technical field [0001] The invention relates to a composite spinneret and a method for manufacturing composite fibers. Background technique [0002] Fibers using thermoplastic polymers such as polyester and polyamide have excellent mechanical properties and dimensional stability, so they are used in a variety of applications, and a large number of fibers endowed with various functions have been developed. [0003] For example, in the application of clothing, for the purpose of imparting a soft feel, etc., the monofilament is thinned and multi-fiberized, and the monofilament is deformed for the purpose of water absorption, quick-drying improvement, and gloss change. In addition, improvements such as modification of polymers are performed for the purpose of imparting new functions such as realization of vivid dyeing. In addition, in the application of industrial materials, in addition to the fineness of monofilaments, multi-fibers and special-shaped cross-sections of monofila...

Claims

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Application Information

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IPC IPC(8): D01D4/06D01D5/34
CPCD01D5/36D01D4/06
Inventor 船越祥二水上诚二增田正人
Owner TORAY IND INC
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