KR102149612B1 - Hybrid yarn for protective clothing and base fabric using the same - Google Patents

Abstract

The present invention relates to a composite yarn for manufacturing safety protective clothing manufactured by hybridizing polyphenylene sulfide fiber, aramid fiber, and basalt fiber, and a base fabric for manufacturing safety protective clothing with improved heat resistance manufactured using the same. Excellent shape stability and durability, and excellent barrier properties of molten metal A composite yarn for manufacturing safety protective clothing and a base fabric manufactured therefrom can be provided.

Description

Composite yarn for safety protective clothing manufacturing and base fabric for manufacturing safety protective clothing using the same {Hybrid yarn for protective clothing and base fabric using the same}

The present invention relates to a composite yarn for manufacturing safety protective clothing and a base fabric for manufacturing safety protective clothing using the same. By hybridizing polyphenylene sulfide fiber, aramid fiber, and basalt fiber, it is safe to have excellent flame retardancy, heat resistance, and barrier properties of molten metal. It relates to a composite yarn for manufacturing protective clothing and a fabric for manufacturing safety protective clothing using the same.

The flame retardancy or heat resistance of the fiber refers to the property of preventing or inhibiting the fiber from burning by itself when the flame is contacted and removed. Fibers having such flame retardancy or heat resistance have been mainly used in the manufacture of safety protective clothing.

Aramid fibers or carbon fibers have been mainly used in fields requiring flame retardancy including conventional safety protective clothing. In particular, safety protective clothing worn to protect the body of workers in high-temperature environments, such as a furnace of a steel mill, must have flame retardancy and barrier properties against molten metal. Work sites such as blast furnaces in steel mills are places where it is inevitable to wear safety protective clothing due to the environment where metal water and sparks exceed 1,000 ℃, but the blast furnace work clothes developed up to now are bulky and heavy, and sweat generated from workers' bodies Because it is not discharged, workers tend to avoid it.

Workers who work in extreme environments such as blast furnaces of steel mills are directly damaged by heat stress from convective heat, ultra-high flames, and metal melts, so they are flame retardant to protect workers and have excellent safety protection against molten metals. Blessing is required.

In addition, since most of the safety protective clothing for the above use is made of leather, it shrinks at high temperatures, and it is heavy and does not have ventilation. In other words, since workers are subject to many restrictions in their activities wearing safety protective clothing, they cannot efficiently work. In particular, leather has many disadvantages as a safety protective clothing, such as suffering from dermatitis (heat rash). In addition, aluminum-coated safety protective clothing has been developed and used, but it provides only protection against heat, and the durability of the metal reflective layer coated with an aluminum layer is low and needs improvement.

Looking at the prior art for the safety protective clothing, Republic of Korea Patent Publication No. 10-1009942 (2011. 01. 20.) uses an oxidant (OXIDANT) as a ramp, and the weft is oxidant (OXIDANT) and Panof ( PANOF) As a double-woven paper woven with two types of yarn, a textile paper for flame-retardant clothing is disclosed, which is configured to provide flame-retardant clothing with a flame-retardant function and excellent tensile strength and comfort on the inner surface, and Korean Patent Publication No. 10-1614873 (2016 In 04. 22.), a first layer made of aramid fibers, a second layer made of a thin film membrane made of Teflon-based resin, and a space formed on one side of the second layer, and formed between the two fabrics, have elasticity. A third layer for forming one fibrous layer by connecting with a pile yarn having a; A fabric for safety protective clothing of firefighting suits and chemical protective clothing is disclosed.

However, the safety protective clothing according to the prior art as described above has a problem in that the process step is very complicated, and the production cost of the products produced through the process is high, so that the economic efficiency and its value are deteriorated. In particular, there is a problem in that the performance of the barrier property of the molten metal during use in a high temperature environment is rapidly deteriorated.

Therefore, it is possible to protect the safety of workers who work in extreme environments such as a furnace, have excellent activity for work efficiency, and develop a safety protective clothing manufacturing material that can provide a pleasant working environment and safety protective clothing using the same. It is urgently required.

The present invention has been devised to solve the above problems, and has excellent activity so as to provide a comfortable working environment to workers working in a high temperature environment such as a furnace, and also flame retardancy, heat insulation, and barrier properties against molten metal. The purpose of this is to provide a composite yarn for manufacturing excellent safety protective clothing and a base fabric for manufacturing safety protective clothing using the same. However, the problem to be solved of the present invention is not limited to the problems mentioned above, and other problems that are not mentioned will be clearly understood by those skilled in the art from the following description.

The composite yarn for manufacturing safety protective clothing of the present invention to achieve the above object is manufactured through a hybridization process of at least two fibers of polyphenylene sulfide fiber, aramid fiber, and basalt fiber, and the hybridization process is a spinning process or plying. It is preferably any one of the steps. The composite yarn for manufacturing the safety protective clothing is preferably composed of 15 to 20% by weight of the polyphenylene sulfide fiber, 20 to 30% by weight of aramid fiber, and 50 to 65% by weight of basalt fiber. In addition, the total fineness of the composite yarn for the manufacture of safety protective clothing of the present invention is 10 to 30 or 170 to 530 denier, and the limiting oxygen index (LOI) is characterized in that it is 28 or more. And the base fabric for manufacturing the safety protective clothing of the present invention is characterized by excellent flame retardancy, heat resistance, and barrier properties of molten metal.

The composite yarn for manufacturing safety protective clothing of the present invention has excellent flame retardancy and heat resistance, no deformation due to high heat or flame, and excellent shape stability and durability due to no shrinkage and relaxation by heat. In particular, by including basalt fiber having excellent barrier properties of a molten metal such as aluminum or iron and inexpensive in price, it is possible to provide a safety protective clothing with excellent price competitiveness.

1 is a structural diagram of a fabric composite 100 for manufacturing safety protective clothing,
2 is a photograph of a composite yarn (a) for manufacturing safety protective clothing according to the present invention and a base fabric (b) woven using the same,
3 is a photograph of a safety protective clothing manufactured using a base fabric manufactured according to the present invention.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but may be implemented in various different forms, and the following embodiments make the disclosure of the present invention complete, and the scope of the invention to those of ordinary skill in the art. It is provided to fully inform you. In addition, in the drawings for convenience of description, the size of the components may be exaggerated or reduced. In the drawings, for example, depending on manufacturing techniques and/or tolerances, variations of the illustrated shape can be expected. Accordingly, the present invention should not be construed as being limited to the specific shape of the region shown in the present specification, but should include, for example, a change in shape resulting from manufacturing.

Hereinafter, a composite yarn for manufacturing safety protective clothing and a base fabric 50 using the same will be described in detail with reference to the drawings. 1 is a structural diagram of a fabric composite 100 for manufacturing safety protective clothing, and Figure 2 is a photograph of a composite yarn (a) for manufacturing safety protective clothing according to the present invention and a base fabric (b) woven using the same And Figure 3 is a photograph of a safety protective clothing manufactured using the base fabric 50 manufactured according to the present invention.

In general, as shown in FIG. 1, the fabric composite 100 for manufacturing a safety protective clothing has a metal reflective layer 10 coated with aluminum for reflecting radiant heat, and is disposed on the surface thereof, and also, the residual heat and flame of radiant heat. And a protective film layer 20 is provided to block the metal melt. The metal reflective layer 10 may be provided in plurality as shown in FIG. 1 to reflect radiant heat. In addition, it is manufactured in a structure in which a base fabric 50 having flame retardancy and barrier properties of a molten metal is bonded using an adhesive layer 40 in order to finally block radiant heat and protect against molten metal.

The safety protective clothing of the present invention can be manufactured as shown in FIG. 3 by sewing the fabric composite 100 for manufacturing the safety protective clothing described above by a known method.

The composite yarn for manufacturing safety protective clothing of the present invention is for manufacturing the base fabric 50 used in the fabric composite 100 for manufacturing the safety protective clothing, and polyphenylene sulfide (PPS) fiber and aramid It is characterized in that it is manufactured through a hybridization process using fibers and basalt fibers.

The PPS fiber refers to a high-functional fiber having a simple molecular structure in which benzene rings and sulfur atoms are alternately arranged in the main chain, and excellent in heat resistance, chemical resistance, hydrolysis resistance, and flame retardancy. The melting point of the PPS fiber is 285 °C, and it is characterized by continuous use at 190 °C. In particular, it has excellent resistance to hydrolysis in an environment with high humidity and resistance to acids, alkalis and organic solvents, and is thus used in a wide range of fields including bag filter applications.

Aramid fibers are synthetic polymers with 85% or more amide group (-CONH-) bonds directly connected to two aromatic rings, and are largely divided into meta-Aramid and para-Aramid. Para-aramid has a high tensile strength of 20-26 g/d and a tensile modulus of 460-1,100 g/d, and meta-aramid has a low level of strength and elasticity compared to polyester, but has excellent heat resistance, flame retardancy, and electricity. It has insulating properties and is widely used in high-temperature filtering materials, insulating papers, and protective clothing. According to a preferred embodiment of the present invention, para-aramid and meta-aramid may be used as the aramid fibers in the manufacture of the composite yarn for the manufacture of safety protective clothing, and meta-aramid fibers are used in the manufacture of safety protective clothing that requires superheat resistance and flame retardancy. And, it is preferable to use para-aramid fibers when manufacturing safety protective clothing that requires excellent tensile strength, elastic modulus, flame retardancy and heat resistance at the same time.

In addition, in basalt fiber, silicon dioxide (SiO ₂ ) accounts for 45-52% of the total, aluminum oxide (Al ₂ O ₃ ) 12-16%, iron oxide 6-18%, alkaline earth metal 10-20%, alkali 2 As a fiber manufactured by melt spinning basalt composed of ~8%, etc., it has the characteristics of being usable from -260 ℃ to 800 ℃, which is a very low temperature due to its excellent heat resistance. In addition, the price of the basalt fiber is about $20/kg, which is relatively inexpensive compared to aramid fiber and PPS fiber.

In the present invention, safety protective clothing can be broadly classified into industrial and firefighting applications. The industrial safety protective clothing is a safety protective clothing worn by workers in an ultra-high temperature environment such as a furnace, and the safety protective clothing for firefighting refers to a safety protective clothing for protecting workers who work by approaching high-temperature radiant heat.

The composite yarn for manufacturing safety protective clothing of the present invention can be manufactured through a hybrid process using PPS fibers, aramid fibers and basalt fibers.

At this time, the hybridization process is preferably either a spinning process or a ply-twisted yarn process.

The spinning process is divided into a spinning preparation process and a spinning process.The spinning preparation process is a process of unpacking compressed fibers and removing dirt, a carding process to create a sliver state, and a sliver uniformity by combining a number of slivers. It consists of a softening process that improves and a training process that makes irradiation. In addition, the spinning process consists of a spinning process in which the irradiation is made thinner to maintain the desired thickness and strength as a yarn, and a winding process in which the produced yarn is wound on a skein or cone. Depending on the equipment used in the spinning process, it is divided into a flyer square, a ring square, and an open-end square. In the spinning process of the present invention, the fiber length is cut into 30 to 55 mm, and then the opening process to remove impurities by cutting through it, the carding process to make an aggregate of infinitely long cotton as a sliver, and a uniformity by combining the slivers. A spinning process for forming spun yarn with an air pressure of 0.50 to 0.60 MPa and a delivery speed of 300 to 450 m/min by the sliver manufactured in the carding process and the softening process to improve; And it is preferable to manufacture through a winding process.

In addition, the ply-twisted yarn process is a process that twists two or more single yarns, and can be performed using a two-for-one twisting machine. In the present invention, the number of twists during the ply-twisting process is 250 to 500 TPM (twist per meter), the heat setting temperature is 80 to 100 °C, and the winding tension is preferably 30 to 35 N.

The heat setting is performed for stabilization and suppression of the restoring force so that the twisted yarn is not unwound. The heat setting completes the heat setting by vacuuming the inside of the setter and applying steam for 60 minutes at 80 to 100°C.

In the present invention, the composite yarn for manufacturing safety protective clothing manufactured through a hybrid process such as a spinning process or a ply-twisted yarn process as described above is wound on a winding roller to complete the manufacturing process.

The composite yarn for the manufacture of safety protective clothing manufactured through the hybrid process as described above is preferably manufactured by combining the polyphenylene sulfide fiber, aramid fiber, and basalt fiber from the viewpoint of price competitiveness, wherein the PPS fiber is 15 to 20 weights %, aramid fiber is preferably composed of 20 to 30% by weight, basalt fiber is composed of 50 to 65% by weight.

The basalt fiber is the most inexpensive fiber, and it is preferable to contain 50 to 65% by weight when preparing the composite yarn for manufacturing safety protective clothing of the present invention. That is, when the basalt fiber is included in an amount of less than 50% by weight, the manufacturing price of the composite yarn for the manufacture of safety protective clothing increases, and when it exceeds 65% by weight, there is a concern that the fit of the manufactured safety protective clothing is deteriorated. That is, basalt fiber is a material far superior to PPS fiber or aramid fiber in terms of flame retardancy and heat resistance, so when the basalt fiber contains 50 to 65% by weight, excellent flame retardancy, heat resistance, and metal of the composite yarn for manufacturing safety protective clothing of the present invention It can improve price competitiveness while expressing the barrier properties of the melt.

That is, the composite yarn for the manufacture of safety protective clothing of the present invention manufactured with the above composition ratio is tested by KS M ISO 4589-2 (plastic-measurement of combustion behavior by oxygen index-Part 2: room temperature test method) The limiting oxygen index (LOI) by the method can be manufactured to be 28 or more.

The total fineness of the composite yarn for manufacturing safety protective clothing of the present invention manufactured as described above is preferably 10 to 30 when manufactured through a spinning process, and 170 to 530 denier when hybridized through a ply-twisted yarn process. desirable. That is, the base fabric 50 manufactured in the case of a composite yarn for manufacturing safety protective clothing with a total fineness of 10 to 30 or 170 to 530 denier has flexibility, and can be conveniently worn when manufacturing safety protective clothing. , Easily detachable.

The composite yarn for manufacturing safety protective clothing of the present invention manufactured as described above may be manufactured in the form of a spun yarn as shown in Fig. 2 (a), and thereafter, the base fabric 50 for manufacturing safety protective clothing through a weaving or knitting process It is manufactured with. That is, the base fabric 50 manufactured using the composite yarn for manufacturing safety protective clothing of the present invention is preferably manufactured in the form of a fabric as shown in Fig. 2 (b), and in particular, increasing the density of the fabric It is most desirable to be woven in twill so that it can be made.

The composite yarn for manufacturing safety protective clothing as described above is woven into a fabric having a structure of twill through two-dimensional interlocking of warp and weft to form the base fabric 50 for manufacturing safety protective clothing. At this time, the warp density is 39 to 78 (±5) bones/inch, and the weft density is preferably 48 to 60 (±5) bones/inch. In addition, the thickness of the base fabric 50 is preferably 0.1 ~ 0.5 mm ± 5%.

In addition, the base fabric 50 manufactured as described above may have a basis weight of 100 to 450 g/m ² . When the basis weight of the base fabric 50 is less than 100 g/m ^2, a large number of fabrics must be stacked to perform the function of the safety protective clothing, resulting in a problem that the manufactured safety protective clothing becomes heavy, and the base When the basis weight of the fabric 50 exceeds 600 g/m ² , the thickness of the safety protective clothing increases and becomes heavier, resulting in a problem that the activity of the worker is deteriorated.

By using the base fabric 50 having the density and basis weight of the warp yarns in the above range, the wearability is excellent when the protective clothing is manufactured, and the shielding of radiant heat and protection against molten metal may be the most excellent.

In order to measure the physical properties of the base fabric 50 for manufacturing safety protective clothing of the present invention manufactured by the above manufacturing method, a composite yarn for manufacturing safety protective clothing was manufactured in the same manner as in Examples 1 to 12 below, and used Then, the fabric was woven and used as a test piece.

(Examples 1 to 6)

PPS fibers having a diameter of 0.05 mm and a length of 50 mm, para-aramid fibers, and basalt fibers were spun in the composition shown in Table 1 below to prepare a composite yarn. At this time, the sliver manufactured in the carding process during the spinning process was manufactured with an air pressure of 0.50 MPa and a delivery speed of 450 m/min. A base fabric 50 having a basis weight of 400 g/m ² was manufactured by woven twill using the composite yarn prepared as described above. The base fabric 50 was subjected to scouring in an aqueous solution to which a surfactant (NaOH or Na ₂ CO ₃ ) was added at a temperature of 50° C., followed by washing and drying processes, and used as a test piece. The warp density of the test piece prepared as described above was 55 pieces/inch, the weft density was 40 pieces/inch, and the thickness was 0.3 mm.

fiber Example One 2 3 4 5 6 cotton yarn Para-aramid fiber
(weight%) 20 22 25 27 30 30 PPS fiber (% by weight) 15 17 20 15 17 20 Basalt fiber (% by weight) 65 61 55 58 53 50 Total fineness (number) 10 20 30 15 20 30

(Examples 7 to 12)

A composite yarn was prepared by combining PPS fibers with a diameter of 0.05 mm, meta-aramid fibers, and basalt fibers in the composition shown in Table 2 below. At this time, the number of twists in the ply-twisting process was 450 TPM (twist per meter), the heat setting temperature was 100 °C, and the winding tension was 35 N. A base fabric 50 having a basis weight of 300 g/m ² was prepared by woven twill using the composite yarn prepared as described above. The base fabric 50 was scoured in an aqueous solution to which a surfactant (NaOH or Na ₂ CO ₃ ) was added at a temperature of 50° C., and then washed with water and dried to be used as a test piece. The warp density of the test piece prepared as described above was 70 pieces / inch, the weft density was 50 pieces / inch, and the thickness was 0.5 mm.

fiber Example 7 8 9 10 11 12 Joint speaker Meta-aramid fiber
(weight%) 30 28 25 28 28 23 PPS fiber (% by weight) 15 20 15 18 15 20 Basalt fiber (% by weight) 55 52 60 54 57 57 Total fineness (denier) 170 300 350 400 500 530

And the physical properties of the test pieces of Examples 1 to 12, that is, limiting flame diffusion characteristics, flame retardancy and molten aluminum resistance and molten iron resistance, and the LOI were evaluated in the following manner, and the results are shown in Table 3.

1) Marginal flame spread characteristics

According to ISO 15025 (Protective clothing-Protection against flame ― Method of test for limited flame spread) for the limiting flame spread characteristics of the test piece prepared as described above, that is, residual flame time, residual time, hole formation, flame spread, and flame fragments. Measured. That is, the test piece was placed vertically and exposed to a flame for 10 seconds for ignition on the surface to measure the residual flame time and the residual time to measure the limiting flame diffusion characteristics to evaluate flame retardancy.

2) Flame retardant

The flame retardancy of the test piece prepared as described above was measured for individual afterflame time of the test piece based on the UL 94 V test (Vertical Burning Test).

3) molten aluminum resistance and molten iron resistance

The molten aluminum resistance of the test piece prepared as described above was measured according to 7.4 of ISO 11612 (Standard for Protective Clothing to protect against Heat and Flame), and the molten iron resistance was measured according to 7.5 of ISO 11612.

4) Limit oxygen index (LOI)

The LOI of the test piece prepared as described above was measured based on KS M ISO 4589-2 (Plastic-Measurement of combustion behavior by oxygen index-Part 2: Room temperature test method).

Marginal flame spread characteristics Molten aluminum resistance (g) Molten iron
Resistance(g) Flame retardancy (second) LOI After salt time
(sec) Residual time
(sec) Example 1 1.3 1.6 352 202 8 40 Example 2 1.2 1.3 361 204 9 38 Example 3 1.0 1.4 366 206 7 33 Example 4 1.6 1.2 363 210 7 35 Example 5 1.0 1.1 358 211 8 36 Example 6 1.6 1.4 355 208 8 32 Example 7 1.8 1.8 362 206 9 29 Example 8 1.4 1.3 364 206 10 28 Example 9 1.6 1.7 358 204 6 36 Example 10 1.5 1.6 357 212 5 31 Example 11 1.4 1.3 355 210 4 32 Example 12 1.5 1.2 356 216 6 33

Looking at Table 3, in the case of the limiting flame diffusion characteristics measured according to ISO 15025, both the residual flame time and the residual time are measured to represent measured values of 2 seconds or less. In addition, when measuring the limiting flame diffusion characteristics, no holes were generated, and flame diffusion and flame fragments were not observed. ISO 15025 is a method of measuring the flame resistance of a fabric when the surface of a fabric is directly exposed to flames, and can provide protection for workers from flames.

As a result of measuring the flame retardancy of the fabric of the present invention according to UL 94 V (Vertical Burning Test), it was measured that fire was extinguished in less than 10 seconds in all test pieces of Examples 1 to 12. That is, the fabric of the present invention has a level of self extinguishing, and exhibited an excellent measured value of V-0.

Therefore, the fabric manufactured using the composite yarn for the manufacture of safety protective clothing of the present invention was measured to have excellent physical properties, that is, bending stiffness and compression elastic recovery rate, and also showed excellent measurement values in the results of flame retardancy and flame resistance.

In particular, as a result of measuring the molten iron resistance according to ISO 11612, the test pieces of Examples 1 to 12 showed a measurement value of 200 g or more, and the molten aluminum resistance was 350 g or more in the test pieces of Examples 1 to 12. The measured values are shown. Therefore, it was found that the fabric produced by using the composite yarn for the manufacture of safety protective clothing of the present invention has particularly excellent barrier properties against molten metal.

In addition, it was confirmed that the LOI of the test piece measured according to KS M ISO 4589-2 showed a measured value of 28 or more in all test pieces, as shown in Table 3.

As discussed above, the present invention has excellent flame retardancy and heat resistance, and has little deformation due to high heat or flame, as well as almost no shrinkage and relaxation due to direct or indirect heat, and thus has excellent physical properties, shape stability, and durability. It is possible to provide a composite yarn for fabrication, and by including basalt fiber having a low price, it is possible to provide a composite yarn having a low price.

The present invention has been described with reference to the embodiments shown in the drawings, but these are merely exemplary, and those of ordinary skill in the art will appreciate that various modifications and equivalent other embodiments are possible therefrom. Therefore, the true technical protection scope of the present invention should be determined by the technical spirit of the appended claims.

Claims (6)

Polyphenylene sulfide fiber, aramid fiber and basalt fiber as a composite yarn for manufacturing safety protective clothing manufactured through a hybridization process, the polyphenylene sulfide fiber is 15 to 20% by weight, aramid fiber is 20 to 30% by weight, basalt Fiber is a composite yarn for manufacturing safety protective clothing, characterized in that consisting of 50 to 65% by weight.
The method according to claim 1,
The aramid fiber is a composite yarn for manufacturing safety protective clothing, characterized in that the para aramid fiber or meta aramid fiber
The method according to claim 1,
The hybridization process is a composite yarn for manufacturing safety protective clothing, characterized in that either a spinning process or a ply-twisted yarn process
delete A base fabric for manufacturing safety protective clothing manufactured using the composite yarn for manufacturing safety protective clothing according to any one of claims 1 to 3.
Safety protective clothing manufactured using the base fabric for manufacturing safety protective clothing of claim 5.

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