KR102178586B1 - Process Of Producing Complex Spun Yarn Of Modacrylic―Conductive fiber Having Excellent Elasticity For Protective Clothes - Google Patents

Abstract

The present invention relates to a method of manufacturing complex spun yarn of modacrylic-conductive fibers for protective clothing. According to the present invention, it is possible to provide complex spun yarn for protective clothing, which is easy to manufacture while mixing conductive fibers with flame-retardant fibers, has good elongation and peeling property, and has excellent uniformity, and thus the complex spun yarn can be used for various protective clothing materials.

Description

Manufacturing method of modacrylic-conductive yarn mixed spun yarn for protective clothing material with excellent elasticity{Process Of Producing Complex Spun Yarn Of Modacrylic-Conductive fiber Having Excellent Elasticity For Protective Clothes}

The present invention relates to a method for producing a modacrylic-conductive yarn mixed spinning yarn for protective clothing having good elongation, good peelability, and excellent uniformity.

Safety work clothes worn by workers in industrial sites require high strength, heat resistance and chemical resistance. For example, body armor, industrial overalls, firefighting suits and military protective clothing used for hazardous applications are made of yarn woven from non-synthetic fibers such as cotton or wool, and then these fabrics are fire resistant based on conventional halogens and phosphorus or one of them. Zero treatment was used, but these work clothes were limited in activity and had heavier problems than general non-heat resistant fabrics.

Among the above industrial safety work clothes, in particular, welding clothes worn during welding work belong to work clothes that require more heat resistance and flame retardancy. In particular, during arc welding work, many sparks are spattered during the welding work process, and there are always risk factors such as electric shock, high temperature heat generated during welding, and unexpected external impact at the workplace.

In addition, when an electric arc occurs during electric work, it generates a shock wave and strong radiant heat along with a strong explosion, so that the metal is melted, so for the safety and life protection of the electric work worker, excellent flame retardant performance is required. .

In order to protect workers from these hazards, welding gears such as welding clothes, welding masks, and welding gloves are worn, and among them, welding clothes especially protect most of one's own body, so other protective equipment Is more important than Conventional welding clothes were made of animal skins, but when sparks are splashed during welding, they are easily shrunk or lost due to high temperature heat, and they are heavy and inconvenient, and there is a problem that ventilation is not available. .

Recently, we have developed welding clothes using high-strength and high-heat-resistant fibers such as para-aramid, meta-aramid, carbonized fiber, PBO, and flame-retardant rayon, which have excellent non-combustibility and heat resistance, but these fabrics showed excellent thermal stability, but generated static electricity. No countermeasures have been made. Accordingly, Korean Patent Registration No. 10-1537261 provides a conductive spun yarn having excellent heat resistance and electrical conductivity by mixing with conductive metal fibers to prevent the generation of static electricity.

However, in the prior art, it is difficult to manufacture the spun yarn due to the stiff physical properties of the conductive metal fiber, the elongation of the produced spun yarn is low, the peeling property is not good, and there is a serious problem in that the uniformity is also deteriorated due to the unevenness of the draft.

Korean Patent Registration No. 10-1537261 (announced on July 16, 2015)

Therefore, according to the present invention, by solving the problems of the prior art, it is easy to manufacture a spun yarn while mixing fibers having conductivity, and the prepared spun yarn has good elongation, good peeling property, and provides a mixed spun yarn for protective clothing with excellent uniformity. Making it a technical task.

Therefore, according to the present invention, the modacrylic fiber is supplied by opening,

A blending process in which the modacrylic fiber and the conductive yarn are separately supplied by opening the conductive yarn in a ratio of 90:10 to 99:1 by weight,

The carding process of making a sliver with a fineness of 0.12 to 0.13 Ne by supplying the supplied mixed raw material of modacrylic fiber and conductive yarn to a carding machine,

Softening process of stretching the sliver at a D/R ratio of 7.0 to 7.5,

After the softening process, a spinning process of supplying a spinning machine with a plier rotation speed of 700 to 800 RPM and drafting at a D/R ratio of 7.0 to 7.5 and twisting of 0.66 to 0.70 T/M to make a spinning yarn of 0.9 to 1.0 Ne,

It consists of a spinning process that supplies the spinning yarn to a ring spinning machine with a bobbin rotation speed of 13,000 to 14,000 RPM, drafts at a D/R ratio of 22 to 44, and twists 3.8 to 4.2 T/M to make a blended yarn of 20 to 40 Ne. Modacrylic-conductive yarn mixed spinning yarn manufacturing method for a protective clothing material having excellent elasticity, characterized in that it is provided.

Hereinafter, the present invention will be described in more detail.

The manufacturing method of the modacrylic-conductive yarn blended yarn of the present invention uses a consumption spinning method, and a blending process of mixing modacrylic fibers and conductive yarns, a carding process of making a sliver, a softening process, a spinning process of making yarns, and a blended yarn It consists of a square process to make.

First of all, looking at the mixing process, modacrylic fibers are cut into a tow shape of 20 to 70 mm length, then opened and supplied, and separately cut into a tow shape of 20 to 70 mm length, and then opened and supplied. Thus, the modacrylic fiber and the conductive yarn are mixed in a weight ratio of 90:10 to 99:1.

The conductive yarn has a structure that is continuous in the fiber long axis direction, and it is preferable to use the conductive yarn of Korean Patent Registration No. 10-0543477 as a conductive yarn comprising a conductive thermoplastic component containing carbon black and a non-conductive thermoplastic component. In particular, it is preferable to use the non-conductive thermoplastic component made of nylon.

When the blending process is completed, a mixed raw material of modacrylic fiber and conductive yarn is supplied to the carding machine to perform the carding process to make a sliver with a fineness of 0.12 to 0.13 Ne. The carding process is a process of combing the raw material fibers (tufts) supplied from the mixing process in the longitudinal direction and removing foreign matters. The fibers are passed through the upper and lower metal needles to parallelize the raw material fibers and remove the foreign matters. Modacrylic fibers and conductive yarns, which are raw materials of the present invention, are characterized by almost no impurities due to the characteristics of the raw materials, but it should be noted that static electricity is generated.

Proper gauge between flat and cylinder is 0.3~0.35 * 0.3~0.35 * 0.3~0.35 * 0.35~0.4 * 0.4~0.45 (mm), and cylinder RPM is 230~254. desirable.

The trumpet diameter (cardioid guide plate) for making the sliver is preferably 10 to 20 mm. If it is less than 10 mm, fiber damage occurs, and if it exceeds 20 mm, the coherence force decreases.

The sliver produced by the carding process should be thicker than that of general cotton fibers. This is to increase the thickness of the sliver in order to increase the strength of the slicing body because the cohesion between the fibers of the raw material is weak. In the case of a general cotton fiber, about 0.12Ne (number) is preferable, but in the case of the modacrylic fiber and conductive yarn of the present invention, a fineness of 0.12 to 0.13Ne (number) is good.

Thereafter, a softening process of stretching the sliver at a D/R ratio of 7.0 to 7.5 is performed.The softening process is the same as a general softening process, but the thickness of the sliver is reduced while stretching by setting the draft ratio to D/R ratio of 7.0 to 7.5. And improve the uniformity.

The softening process is a three-wire draft method, and it is preferable to use a doubling machine having a roller gauge of 55 to 60*60 to 65 mm, a back draft of 1.5 to 1.7, and a total draft of 7.0 to 7.5.

Thereafter, the spinning process is performed. In the case of the present invention, in the case of the spinning process at high speed, since many trimmings occur, the rotational speed of the pliers should be adjusted to about 700 to 800 RPM.

The D/R ratio is about 7.0~7.5, and the number of twists is about 0.55~0.60 T/M to prevent trimming. In the case of the present invention, since the fiber bonding force is low, it is preferable to give a higher T/M. The fineness of the yarn made in this way is about 0.9 to 1.0 Ne (number).

The draft part of the spinning process is a 4-wire draft part, and a roller gauge of 55-60*58-63*63-68mm, a back draft of 1.20-1.25, a main draft of 5.8-6.2, and a total draft of 7.0-7.5 are preferable for discharge.

After the spinning process, spinning process is performed.The spinning yarn is supplied to a ring spinning machine with a bobbin rotation speed of 13000 to 14000 RPM and drafted at a D/R ratio of 22 to 44, giving a twist of 3.8 to 4.2 T/M to 20 to It will make 40 water blended yarn. In the case of the modacrylic fiber-conductive yarn mixed spun yarn of the present invention, it is preferable to impart a square twist of 3.8 to 4.2 T/M, but if it is less than 3.6 T/M, trimming occurs during the spinning process, and the whole fiber is not twisted. There may be a problem that a lot of fine hairs are generated on the exterior of the yarn by migrating to the outer part of the yarn, and if it exceeds 4.2 T/M, the yarn is too stiff, resulting in poor touch and elasticity. This deterioration problem occurs.

The draft part of the square process is a three-wire draft part, and a roller gauge of 50 to 55 * 60 to 65 mm, a back draft of 1.15 to 1.20, a main draft of 19 to 38, and a total draft of 22 to 44 is preferable for discharge.

It is preferable to control the gap between the front roller and the secondary roller of the apron roller to about 40 to 45 mm, which is 13% wider than that of cotton fibers, to prevent nep generation due to cutting of the raw material modacrylic.

After the spinning process is completed, it is preferable to set the humidification to stabilize and relieve stress of the yarn released during the winding process. The humidification setting was performed by setting the heat at a temperature of 50 to 60° C. in a 95% vacuum condition and setting the temperature at room temperature under atmospheric pressure to be about 20 minutes.

Modacrylic-conductive yarn blended yarn, characterized in that the tensile strength is 3.90 to 4.50 g/d, the elongation is 19 to 23%, and the luxury number change rate is -4 to 6% by the spinning method.

Therefore, according to the present invention, it is possible to provide mixed-spun yarn for protective clothing that is easy to manufacture, has good elongation, good peelability, and has excellent uniformity while mixing conductive fibers with flame-retardant fibers. When applied to, the safety protection of workers can be achieved through the expression of flame retardant performance.

1 is a side photograph of the blended yarn of Example 1 of the present invention,
2 is a side microscopic enlarged photograph of the mixed spun yarn of Example 1 of the present invention,
3 is an enlarged cross-sectional microscopic photograph of the blended yarn of Example 1 of the present invention,
Figure 4 is a side photograph of the mixed spinning yarn of Example 2 of the present invention,
Figure 5 is an enlarged side micrograph of the mixed spinning yarn of Example 2 of the present invention,
6 is a cross-sectional microscopic enlarged photograph of the blended yarn of Example 2 of the present invention.

In the following examples, a non-limiting example of manufacturing the modacrylic-conductive yarn blended yarn for a protective clothing material of the present invention is given.

[Example 1]

Modacrylic fiber (PROTEX, KANEKA, 1.7 dtex) is cut into a 40 mm long tow shape, opened and supplied, and separately cut conductive yarn (beltron, Kanebosasan, 1.7 dtex) to a 40 mm long tow type After making it, the modacrylic fiber and the conductive yarn were mixed in a weight ratio of 97.3:2.7 by opening and supplying.

When the honing process is completed, the mixed raw material of modacrylic fiber and conductive yarn is supplied to a flat carding machine with GAUGE 0.3 * 0.3 * 0.3 * 0.35 * 0.4 (mm) between FLAT and CYLINDER, CYLINDER RPM 254, and after carding process, trumpet A carding process was performed to make a sliver with a fineness of 0.125 Ne by passing a trumpet having a diameter of 20 mm.

Thereafter, the sliver was stretched at a D/R ratio of 7.2 to perform a softening process to make the thickness of the sliver 0.143 Ne. (Doubling machine: 3-wire draft method, roller gauge 56*65mm, Back Draft) 1.7, Total Draft 7.2)

After that, the draft roller gauge was 57*60*65mm, the back draft 1.221, the main draft 5.7, and the total draft 7.14 were drafted, and the pliers rotation speed was 700RPM and the twist number was adjusted to 0.57 T/M, and the fineness of the spinning was 1.0 Ne (number). A steaming process to make phosphorus irradiation was performed.

After the spinning process, a spinning process is performed, and the spinning yarn is drafted with a draft roller gauge of 55*75mm, a back draft of 1.17, a main draft of 30.3, and a total draft of 35.5, and a bobbin rotation speed of 14,000 RPM. It was supplied to a machine, twisted with 4.02T/M, and double-kneaded to make a blended yarn having a fineness of 31.0's/2.

After the spinning process was completed, in order to stabilize and relieve stress of the spun yarn released during the winding process, the heat was set at 55° C. under 95% vacuum condition, and then the temperature reduction time under atmospheric pressure was set to about 20 minutes.

[Example 2]

Except for changing the square process main draft to 20.3 in Example 1, the same process was performed to produce a mixed spun yarn having a fineness of 20.6's/2.

The physical properties of the prepared Examples 1 and 2 were measured and shown in Table 1 below.

Evaluation item unit Example 1 Example 2 Assessment Methods count Nm 31.0's/2 20.6's/2 KSK0414:2015 (common type, metric number)
※Ne, English Fiber mixing ratio % Modacrylic:97.3
Nylon: 2.7 Modacrylic:97.3
Nylon: 2.7 KSK0216:2015 (quantitative mixing ratio) The tensile strength g/d 3.93 4.42 KSK0475:2012 (spun yarn)
※Grip distance: 250㎜
※Speed :250㎜/min Shinto % 20.64 22.61 Luxury number change rate % -5.6 -5.6 KSK0215:2012
※Hot water, 100℃/30min

Claims (4)

Modacrylic fiber is refurbished and supplied,
A blending process in which the modacrylic fiber and the conductive yarn are separately supplied by opening the conductive yarn in a ratio of 90:10 to 99:1
The carding process of making a sliver with a fineness of 0.12 to 0.13 Ne by supplying the supplied mixed raw material of modacrylic fiber and conductive yarn to a carding machine,
Softening process of stretching the sliver at a D/R ratio of 7.0 to 7.5,
After the softening process, a spinning process of supplying a spinning machine with a plier rotation speed of 700 to 800 RPM and drafting at a D/R ratio of 7.0 to 7.5 and twisting of 0.66 to 0.70 T/M to make a spinning yarn of 0.9 to 1.0 Ne,
It consists of a spinning process that supplies the spinning yarn to a ring spinning machine with a bobbin rotation speed of 13,000 to 14,000 RPM, drafts at a D/R ratio of 22 to 44, and twists 3.8 to 4.2 T/M to make a blended yarn of 20 to 40 Ne. Modacrylic-conductive yarn mixed spinning yarn manufacturing method for a protective clothing material having excellent elasticity, characterized in that. The method of claim 1,
The conductive yarn is a conductive yarn comprising a conductive thermoplastic component containing carbon black and a non-conductive thermoplastic component having a continuous structure in the long axis direction of the fiber.The method of manufacturing a modacrylic-conductive yarn mixed spun yarn having excellent elasticity for a protective clothing material. The method of claim 1,
The draft part of the spinning process is a 4-wire draft part, and has a roller gauge of 55-60*58-63*63-68mm, a back draft of 1.20-1.25, a main draft of 5.8-6.2, and a total draft of 7.0-7.5. Modacrylic-conductive yarn blended yarn manufacturing method for excellent protective clothing materials. The method of claim 1,
The draft part of the square process is a 3-wire draft part, which is a 3-wire draft part, with a roller gauge of 50 to 55 * 60 to 65 mm, a back draft of 1.15 to 1.20, a main draft of 19 to 38, and a total draft of 22 to 44. This excellent protective clothing material for modacrylic-conductive yarn mixed spinning yarn manufacturing method.

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