KR102568523B1 - Method of manufacturing multi-layer textile for down jacket using polylactide sea/island type composite yarn with stereo-complex crystal structure and high heat-resisting property - Google Patents

Abstract

In the present invention, poly-L-lactic acid (PLLA) and poly-DL-lactic acid (PDLA) are composite-spun through a spinneret for island-in-the-sea composite fibers to obtain a stereo-complex crystal structure and monofilaments Highly heat-resistant polylactide sea-island composite fiber with a diameter of 300~500nm, a melting temperature of 220~235℃, a total fineness of 30~50 denier, a tensile elongation of 25~29%, and a tensile strength of 3.5~4.0g/d. After manufacturing, a multi-weave textile is woven by using it as warp and/or weft yarn, and then sequentially scouring, dyeing, and aging in a multi-stage cold pad batch to manufacture an eco-friendly multi-weave textile for down jackets with particularly excellent heat resistance. .
The multi-weave textile manufactured according to the present invention is made of highly heat-resistant polylactide fiber and has excellent biodegradability and thus is environmentally friendly and has excellent mechanical properties such as heat resistance.
In addition, the multi-weave textile manufactured according to the present invention has low air permeability and can effectively prevent the down filler from escaping when used as a fabric for manufacturing a down jacket. durability can be achieved.

Description

Method of manufacturing multi-layer textile for down jacket using polylactide sea/island type composite yarn with stereo-complex crystal structure and high heat-resisting property}

The present invention is a sea-island composite fiber (hereinafter referred to as "SC-PLA sea-island composite fiber") composed of highly heat-resistant polylactide (hereinafter referred to as "SC-PLA") having a stereo-complex crystal structure. It relates to a method for manufacturing a multi-weave textile for down jackets that is biodegradable, eco-friendly, has excellent heat resistance, low air permeability, strength, durability, warmth, and good touch.

In the case of fabric for manufacturing a down jacket, high density capable of effectively preventing down filler from escaping, as well as excellent strength and durability, as well as good warmth, sense of touch, and deep color are required at the same time.

As a prior art for manufacturing a down jacket, Korean Patent Registration No. 10-0915959 discloses that when a down jacket is manufactured by connecting partial plates in which down is inserted between an outer fabric and a lining, a high-density fabric is placed between the outer fabric and the lining forming the partial plates. A method of forming a down compartment by sewing the outer fabric and the lining together after placing the tape is disclosed, but the prior art has a complicated manufacturing process for preventing the down filler from escaping to the outside.

As another prior art for manufacturing a down jacket, Korean Patent Publication No. 10-2012-0032528 uses a thin film coating fabric coated with a resin in an amount of 01 to 5 g/m2 on the fabric, so that the down filler escapes to the outside. However, a method for preventing it from coming out is disclosed, but the prior art has a problem in that the touch feeling is deteriorated due to the use of a coated fabric.

On the other hand, as a prior art for double weave fabric, in Korean Patent Registration No. 10-0317115, the warp and weft yarns are composed of polyester multifilament front and back both sides and viscose silk multifilament piles, which have the same effect as burnt out velvet Pile double-weave knitted fabric, and Korean Patent Registration No. 10-1566634 discloses a double-weave circular knitted fabric with excellent temperature adaptability. There was a problem of easily escaping to the outside, low strength and durability, and poor touch and deep color.

On the other hand, Korean Patent Registration No. 10-2053234 discloses a method for producing multi-weave textiles using multi-stage stretched dyeable polyester multifilaments as warp and/or weft yarns, but the multi-weave textile prepared by the above method It is not biodegradable like conventional multi-weave textiles, so there is a problem that is not environmentally friendly.

On the other hand, some methods of manufacturing multi-textiles with biodegradable polylactide yarns have been partially attempted, but there is a problem in that the heat resistance of the multi-textiles produced is greatly reduced because the melting temperature of conventional polylactide yarns is low.

An object of the present invention is to be biodegradable, environmentally friendly, have excellent heat resistance, and have low air permeability, so that when used as a fabric for manufacturing a down jacket, the phenomenon of the down filler escaping can be effectively prevented, and good heat retention, touch feeling, strength and It is to provide a method for manufacturing a multi-weave textile for down jackets capable of realizing durability.

In order to solve this problem, in the present invention, poly-L-lactic acid (PLLA) and poly-DL-lactic acid (PDLA) are composite-spun through a spinneret for island-in-the-sea composite fibers to produce a stereo-complex ) has a crystal structure, monofilaments have a diameter of 300-500 nm, a melting temperature of 220-235 ° C, a total fineness of 30-50 denier, a tensile elongation of 25-29%, and a tensile strength of 3.5-4.0 g / d. After producing heat-resistant polylactide sea-island composite fibers, using them as warp and/or weft yarns to weave multi-weave textiles, followed by sequential scouring, dyeing, and aging in a multi-stage cold pad batch, eco-friendly down with particularly excellent heat resistance Manufactures multiwoven textiles for jackets.

The multi-weave textile for down jackets manufactured according to the present invention is made of highly heat-resistant polylactide fibers and has excellent biodegradability and thus is environmentally friendly and has excellent mechanical properties such as heat resistance.

In addition, the multi-weave textile manufactured according to the present invention has low air permeability and can effectively prevent the down filler from escaping when used as a fabric for manufacturing a down jacket. durability can be achieved.

1 and 2 are perspective views of a double weave fabric according to an embodiment of the present invention.
Figure 3 is a view showing the arrangement of warp and weft yarns of a double weave fabric according to an embodiment of the present invention.
4 is a bottom view of a spinneret for spinning sea-island composite fibers used in the present invention.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

In the present invention, (i) one type of polymer selected from poly-L-lactic acid (PLLA) and poly-DL-lactic acid (PDLA) is used as a sea-island composite fiber. The poly-L-lactic acid (PLLA) and Poly-DL-lactic acid (PDLA) is heat-treated and spun separately from each other to obtain a stereo-complex crystal structure, monofilaments with a diameter of 300 to 500 nm and a melting temperature of 220 to 235 ° C. A process for producing highly heat-resistant polylactide sea-island composite fibers having a total fineness of 30 to 50 denier, a tensile elongation of 25 to 29%, and a tensile strength of 3.5 to 4.0 g/d; (ii) weaving a multi-weave textile by using the highly heat-resistant polylactide sea-island composite fibers having a stereo-complex crystal structure as all or part of warp and weft yarns; and (iii) sequentially and continuously scouring, dyeing and aging the woven multi-weave textile in a multi-stage cold pad bath.

Specifically, the present invention first (i) one polymer selected from poly-L-lactic acid (PLLA) and poly-DL-lactic acid (PDLA) The poly-L-lactic acid (PLLA) and poly-DL-lactic acid (PDLA) are heat-treated while separated from each other to conjugate spinning to obtain a stereo-complex crystal structure, monofilaments with a diameter of 300 to 500 nm and a melting temperature of 220 Highly heat-resistant polylactide sea-island composite fibers having a total fineness of 30 to 50 denier, a tensile elongation of 25 to 29%, and a tensile strength of 3.5 to 4.0 g/d are prepared at ~235°C.

At this time, the distance between the poly-L-lactic acid (PLLA) molecules and the poly-DL-lactic acid (PDLA) molecules constituting the highly heat-resistant polylactide sea-island composite fiber determines the poly-L-lactic acid (PLLA). size and poly-DL-lactic acid (PDLA).

Next, a multi-weave textile is woven by using the high heat-resistant polylactide sea-island composite fibers having a stereo-complex crystal structure as all or part of warp and weft yarns.

In the present invention, the high heat-resistant polylactide sea-island composite fiber (SC-PLA sea-island composite fiber) is interlaced, air texturing, draw texturing, or false twisting before the multi-weave textile weaving process. It may additionally include a process of sand processing, etc.

The multi-weave textile may be a double weave fabric or a triple weave fabric.

When weaving multi-weave textiles, it is preferable to adjust the weave density to 250 to 500T to effectively prevent the down filler from escaping to the outside.

Natural fibers or regenerated fibers may be used as part of yarns used in weaving multi-weave textiles, as part of warp and/or weft yarns.

Next, the woven multi-weave textile is sequentially and continuously scoured, dyed, and aged in a multi-stage cold pad bath to prepare a multi-weave textile.

It is preferable to improve the deep color property by adding a pretreatment agent that promotes dye penetrability during the dyeing process.

The multi-weave textile manufactured according to the present invention is made of highly heat-resistant polylactide fiber and has excellent biodegradability and thus is environmentally friendly and has excellent mechanical properties such as heat resistance.

In addition, the multi-weave textile manufactured according to the present invention has low air permeability and can effectively prevent the down filler from escaping when used as a fabric for manufacturing a down jacket. durability can be achieved.

Hereinafter, the present invention will be examined in more detail through Examples and Comparative Examples.

However, the protection scope of the present invention should not be construed as being limited only to the following examples.

Example 1

One polymer selected from Poly-L-lactic acid (PLLA) and Poly-DL-lactic acid (PDLA) is used as an island component of a spinneret for spinning sea-island composite fibers. The poly-L-lactic acid (PLLA) and poly-DL-lactic acid (PDLA) is heat-treated while being separated from each other to conjugate spinning, and monofilaments have a diameter of 500 nm, a melt viscosity of 220 ° C, a total fineness of 50 denier, a tensile elongation of 25%, a tensile strength of 3.5 g / d, and a stereo- Highly heat-resistant polylactide sea-island composite fibers (SC-PLA sea-island composite fibers) having a stereo-complex crystal structure were prepared.

At this time, the distance between the poly-L-lactic acid (PLLA) molecules and the poly-DL-lactic acid (PDLA) molecules constituting the highly heat-resistant polylactide sea-island composite fiber determines the poly-L-lactic acid (PLLA). The crystal size was adjusted to be smaller than the crystal size of poly-DL-lactic acid (PDLA).

Next, a two-weave fabric having a density of 350T and a weight per unit area of 40 g/m2 was prepared by using the above-mentioned SC-PLA sea-island composite fibers as all of the warp and weft yarns.

Next, the double-weave fabric was sequentially and continuously scoured (heat treated), dyed, and aged in a multi-stage cold pad bath to prepare a double-weave dyed fabric (textile).

Table 1 shows the results of evaluating various physical properties of the double-weave dyed fabric prepared as described above.

Comparative Example 1

Equal amounts of L-lactide and D-lactide were copolymerized to prepare a 75-denier polylactide yarn with racemic polylactic acid, a low-crystalline random copolymer.

Next, a double weave fabric having a density of 350T and a weight per unit area of 40 g/m 2 was prepared by using the polylactide yarn as all of the warp and weft yarns.

Next, the double-weave fabric was sequentially and continuously scoured (heat treated), dyed, and aged in a multi-stage cold pad bath to prepare a double-weave dyed fabric (textile).

Table 1 shows the results of evaluating various physical properties of the double-weave dyed fabric prepared as described above.

division Example 1 Comparative Example 1 Tear strength (N) 7.1/7.1 6/4 Color fastness to washing (grade) 4 3-4 Perspiration fastness (grade) 4 3-4 air permeability
(cm3/cm2/sec) 0.8 1.5 Abrasion strength (times) 20,000 10,000 Warmth (%) 92 55 Melting point(℃) 220 170

Tear strength in Table 1 was evaluated by the ASTM D 2261 method, washing fastness was evaluated by the AATCC 61 method, sweat fastness was evaluated by the AATCC 15 method, air permeability was evaluated by the KSK ISO 9237 method, and abrasion strength KS K It was evaluated by the ISO 12947-2 method, and the heat retention was evaluated by the KSK 0560 constant temperature method (Method A) after filling 150g of down filler, and the melting point was evaluated using differential scanning calorimetry (DSC).

1: Island component formation part in the spinneret for island-in-the-sea composite fiber spinning
2: Sea component formation part in the spinneret for sea-island composite fiber spinning
10: first fabric layer
11: first warp 12: first weft
20: second fabric layer 21: second warp
22: second weft 30: down filling part
32: down filling space 40: joint
43: third connection part 45: connection weft

Claims (3)

(i) A spinneret for spinning sea-island composite fibers using one type of polymer selected from Poly-L-lactic acid (PLLA) and Poly-DL-lactic acid (PDLA) The poly-L-lactic acid (PLLA) and poly-DL -Complex spinning while heat-treating lactic acid (PDLA) in a state separated from each other to have a stereo-complex crystal structure, monofilaments with a diameter of 300 to 500 nm, a melting temperature of 220 to 235 ° C, and a total fineness A process for producing highly heat-resistant polylactide sea-island composite fibers having a tensile elongation of 25 to 29%, a tensile strength of 3.5 to 4.0 g/d, and a tensile elongation of 30 to 50 denier;
(ii) weaving a multi-weave textile by using the highly heat-resistant polylactide sea-island composite fibers having a stereo-complex crystal structure as all or part of warp and weft yarns; and
(iii) sequentially and continuously scouring, dyeing, and aging the woven multi-woven textile in a multi-stage cold pad bath;
The distance between the poly-L-lactic acid (PLLA) molecules and the poly-DL-lactic acid (PDLA) molecules constituting the highly heat-resistant polylactide sea-island composite fiber is the crystal size of the poly-L-lactic acid (PLLA) and Manufacturing method of multiweave textile for down jacket using highly heat-resistant polylactide sea-island composite fiber having a stereo-complex crystal structure characterized in that the crystal size is smaller than that of poly-DL-lactic acid (PDLA) . delete The down jacket using highly heat-resistant polylactide sea-island composite fibers having a stereo-complex crystal structure according to claim 1, wherein the multi-weave textile is one selected from a double-weave fabric and a triple-weave fabric. Manufacturing method of multi-weave textile for use.