KR101946948B1 - Meta-aramid fabric with excellent shirinkge and touch and method of manufacturing the same - Google Patents

Abstract

The meta-aramid fabric according to the present invention is composed of a meta-aramid covering yarn composed of a spandex filament, which is at least one selected from warp yarns and weft yarns, and a twin yarn yarn obtained by combining two core yarns of a core-sheath type meta-aramid yarn, The core-sheath type meta-aramid mixed yarn is composed of a core portion of a spandex filament and a sheath-added meta-aramid blend yarn.
Since the meta-aramid fabric is blended with the meta-aramid staple fiber, the flame-retardant staple fiber and the antistatic staple fiber, the warp and / or stitch yarn of the meta-aramid fabric is excellent in texture and flame retardancy, Three spandex filaments are included, which greatly improves the stretchability.
The meta-aramid fabrics of the present invention are therefore particularly useful as fire-fighting fabrics.

Description

TECHNICAL FIELD The present invention relates to a meta-aramid fabric having excellent stretchability and texture, and a method for producing the same.

The present invention relates to a meta-aramid fabric having excellent stretchability and feel, and a method for producing the same, and more particularly, to a meta-aramid fabric having excellent flame retardancy and good stretchability and feel and thus being useful as a fire-fighting fabric.

As a fire-fighting fabric requiring high flame retardancy, fabrics made of meta-aramid yarn having warp and / or weft are widely used, but the fabric has low elasticity and bad touch.

In general, Meta-aramid yarns have excellent flame retardancy and heat resistance, but have low elasticity and a poor texture so that they can not be used as garment yarns, especially as fire-fighting yarns.

In order to solve the above problem, Korean Patent Registration No. 10-1011722 discloses an aramid covering yarn made of a two-component yarn which is composed of spandex (polyurethane) filament and two yarns of aramid yarn as an effect yarn (covering yarn) And warp and / or weft as weft. The aramid fabric has a somewhat improved elasticity and feel when compared to an aramid fabric woven using an aramid yarn or an aramid filament as a warp and / or weft yarn, but because the spandex filament content of the aramid covering yarn is too low, There was a limit in that the stretchability and texture could not be improved up to the level required for the fabric.

Korean Patent Laid-Open Publication No. 10-2011-0077229 discloses aramid fabrics woven using warp yarns and / or weft yarns of meta-aramid / spandex mixed yarns composed of a core part and a meta-aramid yarn as a sheath .

The aramid fabric also has a somewhat improved elasticity and feel when compared to an aramid fabric woven using an aramid yarn or an aramid filament as a warp and / or weft yarn, but the spandex filament content of the aramid covering yarn is too low, There was a limit in that the stretchability and texture could not be improved up to the level required for the fabric.

It is an object of the present invention to provide a meta-aramid fabric useful as a garment fabric, especially as a fire-fighting fabric, with excellent flame retardancy and good stretchability and texture.

A further object of the present invention is to provide a method of making the meta-aramid fabric.

In order to achieve the above object, the present invention provides a process for producing a meta-aramid blend sliver by (i) blending meta-aramid staple fiber, flame retardant staple fiber and antistatic staple fiber, (ii) A method for producing a core-sheath type meta-aramid blend yarn by supplying a meta-aramid blend sliver, (iii) combining two core-sheath type meta-aramid blend yarns, (2) a process for producing a meta-aramid covering yarn, wherein the yarn is wrapped around the yarn by a hollow spindle (4) mechanism using a spandex filament as an effect yarn, and (v) The weft yarn is weirhed using the meta-aramid covering yarn, The core-sheath type meta-aramid mixed yarn is composed of a spandex filament yarn of core-sheath type meta-aramid yarn, and the core-sheath type meta-aramid yarn is composed of spandex filament yarn To produce a meta-aramid fabric composed of a sheath-added meta-aramid blend yarn.

Since the meta-aramid fabric is blended with the meta-aramid staple fiber, the flame-retardant staple fiber and the antistatic staple fiber, the warp and / or stitch yarn of the meta-aramid fabric is excellent in texture and flame retardancy, Three spandex filaments are included, which greatly improves the stretchability.

The meta-aramid fabrics of the present invention are therefore particularly useful as fire-fighting fabrics.

1 is a schematic view of a process for producing a meta-aramid covering yarn;

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

The meta-aramid fabric according to the present invention is composed of a meta-aramid covering yarn composed of a spandex filament, which is at least one selected from warp yarns and weft yarns, and a twin yarn yarn obtained by combining two core yarns of a core-sheath type meta-aramid yarn, The core-sheath type meta-aramid mixed yarn is characterized in that the core portion is a spandex filament and the sheath is a meta-aramid blend yarn.

Three yarn spandex filaments are included in the warp and / or weft constituting the meta-aramid fabric to greatly enhance the stretchability.

In addition, the warp and / or weft constituting the meta-aramid fabric include not only filament type but also spun yarn type core-sheath type meta-aramid mixed yarn.

In addition, since the meta-aramid fabric comprises the meta-aramid blend yarn mixed with the flame retardant staple fibers and the like, the texture is further improved and the manufacturing cost is lowered.

The meta-aramid blend of the core-sheath type meta-aramid blended yarn comprises (i) 100 parts by weight of meta-aramid staple fibers, (ii) one flame retardant staple fiber selected from flame retardant rayon staple fibers and flame retardant polyester staple fibers, And (iii) 1 to 6 parts by weight of antistatic treated antistatic short fibers are blended to improve the stretchability and feel of the meta-aramid fabric at the same time.

Next, a method for producing a meta-aramid fabric according to the present invention will be described in detail.

A method for producing a meta-aramid fabric according to the present invention comprises the steps of: (i) mixing 20 to 60 parts by weight of one flame retardant staple fiber selected from flame retardant rayon staple fibers and flame retardant polyester staple fibers based on 100 parts by weight of staple fibers of meta- 1 to 6 parts by weight of an antistatic short fiber is mixed and then carded and drawn to produce a meta-aramid blend sliver; (Ii) a spandex filament is fed between the Efron roller and the front roller of the ring spun yarn, and at the same time, the meta-based aramid blend sliver is supplied to the apron rollers of the ring spun yarn and twisted while being drafted so that the core part is a spandex filament, A process for producing a core-sheath type meta-aramid blend consisting of a blend yarn; (Iii) combining two core-sheath type meta-aramid blend yarns to produce a twin-sum twist yarn; (Iv) The spandex filaments to be inspected are supplied from the winding bobbin 1 to the second supply rollers 5 through the first supply rollers 2 and the hollow spindles 4 of the effective yarn winding spool 3, The twin sliver yarn in which the two core-sheath type meta-aramid mixed yarns are wound together on the winding spool 3 is fed from the winding spool 3 to the second supply roller 5 via the guide roller 7 A process for producing a meta-aramid covering yarn, wherein the yarn is a spandex filament and the yarn is a twin-joint yarn in which an effect yarn is combined with two core-sheath type meta-aramid yarns; And (v) weaving the meta-aramid fabric using at least one meta-aramid covering yarn selected from warp and weft yarns.

Specifically, first, 20 to 60 parts by weight of one flame retardant staple fiber selected from flame retardant rayon staple fibers and flame retardant polyester staple fibers based on 100 parts by weight of meta-aramid staple fibers, and 1 to 6 parts by weight of antistatic staple fibers Mixed and then carded and drawn to produce a meta-aramid blend sliver.

Next, the spandex filament is supplied between the Ephron roller and the front roller of the ring spun yarn, and at the same time, the meta-based aramid blend sliver is fed to the apron roller of the ring spun yarn and twisted while being drafted to form a spandex filament core portion, To produce a core-sheath type meta-aramid blend consisting of an aramid blend yarn.

Next, two core-sheath type meta-aramid blend yarns are combined to produce a twin-sum twist yarn.

Next, the spandex filaments to be inspected are supplied from the winding bobbin 1 to the second supply roller 5 through the first supply roller 2 and the hollow spindle 4 of the effective yarn winding spool 3, The two combined yarns, which are wound together on the yarn take-up spool 3 and are combined with two core-sheath type meta-aramid mixed yarns, are fed from the winding spool 3 to the second supply rollers 5 via the guide rollers 7 A meta - aramid covering yarn, which is a twin - joint twin yarn combined with a core - sheath type meta - aramid blend yarn, is prepared by spandex filament yarn.

Finally, the meta-aramid fabric is woven using at least one meta-aramid covering yarn selected from warp yarns and weft yarns.

Because the meta-aramid staple fiber, the flame-retardant staple fiber, and the antistatic staple fiber are blended together, the warp and / or stitch of the meta-aramid fabric produced as described above is excellent in the feeling of fabrication and flame retardancy, And / or three strand spandex filaments are included in the weft yarn, whereby the stretchability is greatly improved.

The meta-aramid fabrics of the present invention are therefore particularly useful as fire-fighting fabrics.

Hereinafter, the present invention will be described in detail with reference to examples and comparative examples.

Example  One

100 parts by weight of meta-aramid short fibers, 30 parts by weight of flame retardant rayon fibers and 5 parts by weight of antistatic polyester short fibers were mixed and carded and drawn to prepare a meta-aramid blend sliver.

Next, 20 spandex filaments were supplied between the apron roller and the front roller of the ring spun yarn, and the meta-aramid blend sliver was fed to the apron rollers of the ring spun yarn and twisted at 500 T / M while being drafted, 40 number of core-sheathed meta-aramid blends consisting of filament and sheath-modified meta-aramid blend were prepared.

Next, two core-sheath meta-aramid blend yarns were combined to produce a twin-sum twist yarn.

Next, as shown in Fig. 1, the spandex filaments to be inspected are fed from the winding bobbin 1 through the first supply roller 2 and the hollow spindle 4 of the effect yarn winding spool 3 to the second supply rollers 5 ) And the two yarns of the core-sheath type meta-aramid mixed yarn wound around the effect yarn winding spool (3) are fed from the winding spool (3) through the guide roller (7) to the second supply A meta-aramid covering yarn, which is a twin-joint yarn in which the yarn is fed to a roller (5), and the yarn is spandex filament and two yarns of core-sheath type meta-aramid yarn are wound,

Next, the meta-aramid fabric was woven from an air jet loom using the meta-aramid covering yarn as a warp yarn and 40-number of meta-aramid yarn as a weft yarn.

Table 1 shows the results of evaluating elongation, elastic recovery, tensile strength and texture of the produced meta-aramid fabric.

Comparative Example  One

40 denier spandex filaments were supplied as a yarn, and meta aramid spun yarn 2 combined yarn was sieved so as to have an S-stiffness of T / M of 600 to 900 as a spun yarn having a fineness of 30 to 50, and the spandex A total of 40 meta - aramid covering yarns were fabricated by covering meta - aramid yarn twin yarn twist yarn, which is an effect yarn, around the filament.

Next, the meta-aramid fabric was woven from an air jet loom using the meta-aramid covering yarn as a warp yarn and 40-number of meta-aramid yarn as a weft yarn.

Table 1 shows the results of evaluating elongation, elastic recovery, tensile strength and texture of the produced meta-aramid fabric.

Comparative Example  2

A 20 denier spandex filament was fed between the apron roller and the proton roller of the ring spunter while being stretched at a stretching ratio of 2.0, and at the same time, a meta-aramid sliver was stretched to the apron roller of the ring spunter at a stretching ratio of 3.0, M was twisted and mixed to prepare a mixed yarn of meta-aramid spandex mixed with spandex filament (core part) so as to wrap the meta-aramid yarn (sheath part).

Next, a meta-aramid fabric was produced in an air-jet loom using the meta-aramid yarn / spandex mixed yarn as a warp yarn and 40 yarns of meta-aramid yarn as a weft yarn.

Table 1 shows the results of evaluating elongation, elastic recovery, tensile strength and texture of the produced meta-aramid fabric.

division Example 1 Comparative Example 1 Comparative Example 2 Strength (N)
Oblique direction 998 914 910 Weft direction 620 591 582 Elasticity Recovery Rate (%)
Oblique direction 94 90 88 Weft direction 99 98 97 Shinto (%) Oblique direction 50 45 43 Weft direction 109 105 100 Texture
Great usually usually

The strength and elongation shown in Table 1 were measured in accordance with KS K 0520: 2004 Gravure Method C.R.E. TYPE. The elastic recovery rate was measured by KS K 0541 method. The sensory scores were classified as "excellent" when more than 8 persons were judged to be good, and "normal" when less than 7 persons were judged as good Respectively.

1: winding bobbin 2: first supply roller
3: Spool of effect yarn 4: Hollow spindle
5: second supply roller 6: winding bobbin
7: Guide roller

Claims (3)

Wherein the core-sheath type meta-aramid composite yarn is composed of a meta-aramid covering yarn composed of a spun-dye filament selected from at least one of warp yarns and weft yarns, and a twin- Characterized in that the core portion is a spandex filament and the sheath portion is made of a meta-aramid blend yarn. The method of claim 1, wherein the sheath-bound meta-aramid blend of core-sheath type meta-aramid mixed yarns comprises (i) 100 parts by weight of meta-aramid short fibers, (ii) one kind selected from flame retardant rayon staple fibers and flame retardant polyester staple fibers (Iii) 20 to 60 parts by weight of flame retardant staple fibers, and (iii) 1 to 6 parts by weight of antistatic treated antistatic staple fibers are blended. (I) 20 to 60 parts by weight of one flame retardant staple fiber selected from flame retardant rayon staple fiber and flame retardant polyester staple fiber based on 100 parts by weight of meta-aramid staple fiber and 1 to 6 parts by weight of antistatic staple fiber Followed by carding and drawing to produce a meta-aramid blend sliver;
(Ii) a spandex filament is fed between the apron roller and the front roller of the ring spun yarn, and at the same time, the meta-aramid blend sliver is fed to the apron rollers of the ring spun yarn and twisted while being drafted so that the core part is a spandex filament, To produce a core-shaped meta-aramid blend;
(Iii) combining two core-sheath type meta-aramid blend yarns to produce a twin-sum twist yarn;
(Iv) The spandex filaments to be inspected are supplied from the winding bobbin 1 to the second supply rollers 5 through the first supply rollers 2 and the hollow spindle 4 of the effective yarn winding spool 3, The twin sliver yarn in which the two core-sheath type meta-aramid mixed yarns are wound together on the winding spool 3 is fed from the winding spool 3 to the second supply roller 5 via the guide roller 7 A process for producing a meta-aramid covering yarn, wherein the yarn is a spandex filament yarn and an effect yarn is a twin-joint yarn obtained by combining two core-sheath type meta-aramid yarn blend yarns; And
And (v) weaving the meta-aramid fabric using at least one selected from among warp yarns and weft yarns using the meta-aramid covering yarn.

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