Spun-dyed, crimped polylactic acid fiber, method for manufacture thereof, and carpet

Inactive Publication Date: 2009-08-20
SUMINOE TEXTILE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0071]In the invention [1], the cross-section of the filament constituting the spun-dyed textured filament yarn is limited to a specific configuration, the relative viscosity is limited so as to fall within a specific range, and the tenacity, the elongation, the total fineness, the filament fineness, the hot water shrinkage ratio and the dry heat crimp ratio are each limited so as to fall within respective specified ranges. Therefore, a spun-dyed textured polylacted filament yarn excellent in bulkiness, toughness, and abrasion resistance can be provided.
[0072]In the invention [2], since the filament has an approximately circular or circular cross-section having a degree of deformation less than 1.5, the abrasion resistance can be further improved.
[0073]In the invention [3], since as the coloring agent, at least one pigment selected from the group consisting of an inorganic pigment and an organic pigment is used, there is an advantage that the heat resistance, the light resistance, the weather resistance can be improved as compared with other coloring agents such as colorants (in other words, in the case of colorants, since they can be easily decomposed, sufficient heat resistance cannot be obtained).
[0074]In the invention [4], since the spun-dyed textured polylacted filament yarn as recited in any one of the aforementioned Items [1] to [3] is used as at least a part of constituent yarns, the carpet is rich in voluminous look, and rich in texture and excellent in bulkiness, abrasion resistance and buckling

Problems solved by technology

A conventional carpet using textured polylacted filament yarns, however, has such drawbacks that it lacks bulkiness, it is easily worn away and it is easily buckled.
Because of these drawbacks, such a carpet has very limited practical usages.
This is because the filament yar

Method used

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  • Spun-dyed, crimped polylactic acid fiber, method for manufacture thereof, and carpet
  • Spun-dyed, crimped polylactic acid fiber, method for manufacture thereof, and carpet
  • Spun-dyed, crimped polylactic acid fiber, method for manufacture thereof, and carpet

Examples

Experimental program
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Effect test

example 1

[0277]Using the manufacturing device shown in FIG. 1, a polylacted textured filament yarn was manufactured. In detail, polylacted chips (polymer of lactide monomer consisting of L-lactide 98 mass % and D-lactide 2 mass %, weight-average molecular weight: 140,000, relative viscosity: 3.2; glass transition temperature Tg: 57° C., melting point: 170° C., temperature of a softening point Ts: 130° C., crystallization temperature Tc: 115° C.) in the amount of 100 mass parts were thrown in through the polylacted chips inlet 10 and carbon black master batch (including the aforementioned polylacted polymer: 75 mass %, carbon black: 25 mass %) 4 mass parts were thrown in through the coloring agent inlet 11. While expelling any remaining air, they were melt-blended in the biaxial extruder 12 with vents 13 at 230° C. Thereafter, they were extruded through a total of 64 holes each having a circular cross-section (round circular cross-section) of the spinning nozzle 15 attached to the tip of the ...

example 2

[0283]Using the manufacturing device shown in FIG. 1, a polylacted textured filament yarn was manufactured. In detail, polylacted chips (polymer of lactide monomer consisting of L-lactide 98 mass % and D-lactide 2 mass %, weight-average molecular weight: 140,000, relative viscosity: 3.2; glass transition temperature Tg: 57° C., melting point: 170° C., temperature of a softening point Ts: 130° C., crystallization temperature Tc: 115° C.) in the amount of 100 mass parts were thrown in through the polylacted chips inlet 10 and carbon black master batch (including the aforementioned polylacted: 75 mass %, carbon black: 25 mass %) in the amount of 4 mass parts were thrown in through the coloring agent inlet 11. While expelling any remaining air, they were melt-blended in the biaxial extruder 12 with vents 13 at 230° C. Thereafter, they were extruded through a total of 64 holes each having a circular cross-section (round circular cross-section) of the spinning nozzle 15 attached to the ti...

example 3

[0289]A spun-dyed polylacted textured filament yarn was manufactured in the same manner as in Example 1 except that a filament yarn comprising a filament having an approximately circular cross-section having a degree of deformation of 1.4 was used. The characteristics of the obtained spun-dyed polylacted textured filament yarn are shown in Table 1. Furthermore, using the obtained spun-dyed polylacted textured filament yarn, a tufted carpet was obtained in the same manner as in Example 1.

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Abstract

A spun-dyed textured polylacted filament yarn according to the present invention comprises a textured polylacted filament yarn, wherein the textured polylacted filament yarn includes a filament having an approximately circular or circular cross-section and has a relative viscosity of 2.5 to 3.8, wherein the textured polylacted filament yarn contains a coloring agent in an amount of 0.01 to 3 mass %, and wherein the textured polylacted filament yarn is 1.75 to 3.5 cN/dtex in tenacity, 35 to 60% in elongation, 500 to 3,500 dtex in total fineness, 2.5 to 25 dtex in a filament fineness, 2 to 8% in hot water shrinkage ratio, and 5 to 25% in dry heat crimp ratio. By employing the above structure, a spun-dyed textured polylacted filament yarn excellent in loftiness, toughness and abrasion resistance can be obtained. It is preferable that the cross-section of the filament has a degree of deformation less than 1.5, the degree of deformation being expressed by a ratio (B/A) of a diameter B of an circumscribed circle of the filament cross-section to a diameter A of a inscribed circle of the filament cross-section.

Description

TECHNICAL FIELD[0001]The present invention relates to a spun-dyed textured polylacted filament yarn excellent in bulkiness, toughness and abrasion resistance, and the production method thereof. It also relates to a carpet constituted by the textured filament yarns, which has sufficient voluminous look and is excellent in texture and abrasion resistance.[0002]In this specification, the wording of “spun-dyed textured synthetic filament yarn” is used as an interpretation of the word which does not include a spun-dyed textured polylacted filament yarn.BACKGROUND TECHNIQUE[0003]Polylactide polymer is a biodegradable resin made from lactide obtained from amylum of, e.g., corn and can be decomposed into water and carbon dioxide by microorganisms, etc. Therefore, it has attracted attention as an earth-conscious material matching the natural global material circulation. Using polylacted filament yarns made from biodegradable resin, it has been considered to produce an option carpet for vehic...

Claims

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Application Information

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IPC IPC(8): D03D27/00D02G3/02D01F1/06
CPCD01D5/253D01F1/04D01F6/625D10B2331/04D02G3/445D10B2321/022D10B2331/02D02G3/442Y10T428/23993
Inventor FUNATSU, KENICHIOKAMOTO, YOSHIHIKOHAYASHI, YOSHIKIYOSHIDA, HIROJI
Owner SUMINOE TEXTILE CO LTD
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