KR102297700B1 - Fire resistant fabric using caron fiber and preparation method thereof - Google Patents

Abstract

The present invention relates to a refractory fabric using carbon fiber and a method for manufacturing the same.
The fire resistant fabric using the carbon fiber of the present invention is characterized by comprising composite particles composed of cellulose silicate fiber, aramid nitrogen-containing polymer resin, carbon fiber, and 35-40 wt% of titanium dioxide and 60-65 wt% of silicon dioxide.
According to the present invention, it has waterproof, smoke-retardant effect, mechanical durability, and has excellent fire resistance as it is strong even at a high temperature of 1700 to 2200 ° C. , a fire resistant fabric that can be used for various functional clothing fabrics including work clothes is provided.

Description

Fire resistant fabric using carbon fiber and its manufacturing method {Fire resistant fabric using caron fiber and preparation method thereof}

The present invention relates to a fireproof fabric using carbon fiber and a method for manufacturing the same, and more specifically, to a fireproof fabric using carbon fiber, which has waterproof, smoke-retardant effect, and mechanical durability. It relates to a refractory fabric and a method for manufacturing the same.

Aromatic polyamide called aramid was developed to improve the heat resistance of nylon, an aliphatic polyamide, and has excellent heat resistance and high tensile strength that can be used for fibers such as flame-retardant textile fabrics and tire cords.

A general aliphatic polyamide is a synthetic resin in which aliphatic hydrocarbons are bonded between amide groups, but aramid refers to a synthetic resin in which 85% of benzene groups between amide groups are bonded to two aromatic rings. The aliphatic hydrocarbon of the aliphatic polyamide easily undergoes molecular movement when heat is applied, but the benzene ring of the aromatic polyamide has a rigid molecular chain and does not move easily even when heat is applied. shows many differences in characteristics.

In particular, meta-aramid is representative of Nomex developed by DuPont and Conex developed by Teijin. Meta-aramid is a benzene ring bonded to an amide group at the meta position. Although the strength and elongation are similar to those of normal nylon, it has good heat stability, is lighter than other heat-resistant materials, and can absorb sweat to some extent, so it has the advantage of being comfortable. In industrial applications, it is used as a high-temperature filter.

On the other hand, carbon fiber (carbon fiber) has no harmful dust and no skin irritation, but since the fineness limit is 10 to 14, there is no particular problem in using it for welding spark-resisting sheets, heat-dissipating curtains, etc., but heat-resistant gloves requiring a certain flexibility , firefighting clothes, heat dissipation suits, welding clothes, heat dissipation curtains for residential spaces, flame-resistant sound-absorbing wallpaper, etc.

Fibers treated with a flame retardant as a fire resistant fiber are manufactured by a fire resistant treatment method in which a flame retardant is fixed to a fiber product, which is a combustible material, and is treated so as not to be burned by imparting fire resistance. There is a problem in that the refractory material can be separated by friction during handling, and the fire resistance is lowered after a certain period of time, so that it is easily combusted, and there is a problem of emitting toxic gas when the organic fiber is burned.

Conventionally, in order to improve the flame retardancy of the resin, a method of adding an organophosphorus compound, a phosphorus phenol-containing resin, a halogen compound, etc. to a polymer has been proposed, and a method of improving the flame retardancy by mixing an organophosphorus compound containing a halogen atom is proposed. However, since they are organic compounds of low molecular weight, some of them are discharged during the molding process of fibers or contain halogens, so they have a problem that goes against the recent dehalogenation movement concerned about environmental problems. The biggest problem with refractory fibers that add flame retardants to them is that if they are washed several times, they lose their flame retardant function, feel uncomfortable when worn because they are stiff, and eventually dissolve and damage the skin when exposed to high temperatures of 300°C or higher for a long time. .

1. Korean Patent Laid-Open Publication No. 10-1993-0006010 'Core spun yarn for manufacturing fire-resisting safety clothing and manufacturing method thereof' 2. Korea Patent Publication No. 10-2008-0062319 'Core spun yarn for manufacturing safety clothing'

The present invention is to solve the problems of conventional refractory fiber materials as described above, and a refractory fabric containing cellulose silicate fiber, aramid nitrogen-containing polymer resin, carbon fiber, and composite particles in which titanium dioxide and silicon dioxide are mixed. However, it is intended to provide a fire-resistant fabric that has waterproof, smoke-proof effect, mechanical durability, and particularly has excellent fire resistance and withstands a high temperature of 1700 to 2200°C.

In addition, in the present invention, it is an object of the present invention to provide a fire resistant fabric that can be used for various functional clothing fabrics, including heat-resistant clothing such as firefighting clothing, supplementary clothing, and work clothes, because it is soft to the touch and comfortable to wear.

The purpose of the present invention and its technical problems are not limited to the technical problems described above. Therefore, other technical problems not mentioned will be clearly understood by those of ordinary skill in the art to which the present invention belongs from the following description.

The refractory fabric using the carbon fiber of the present invention for achieving the above object is a composite particle composed of cellulose silicate fiber, aramid nitrogen-containing polymer resin, carbon fiber, and 35-40 wt% of titanium dioxide and 60-65 wt% of silicon dioxide It is characterized by inclusion.

In addition, the fire resistant fabric is 80 to 85 parts by weight of the aramid nitrogen-containing polymer resin, 71 to 75 parts by weight of the carbon fiber, and 0.1 to 0.5 parts by weight of the composite particles based on 100 parts by weight of the cellulose silicate fiber.

In addition, the fire resistant fabric is characterized in that it further comprises a mixed solution consisting of fumed silica, strong base dissolved water, and a surfactant.

In another method of manufacturing a refractory fabric according to the present invention, one or more cellulose components of natural pulp, natural cotton, or sawdust are mixed with a hydrated sodium silicate solution or a hydrated potassium silicate solution at 100 to 150° C. for 10 to 20 hours. After heating in a first step of manufacturing cellulose silicate fiber by adding sulfuric acid or hydrochloric acid, cellulose silicate fiber of the first step, aramid nitrogen-containing polymer resin, carbon fiber, and titanium dioxide 35-40 wt% and silicon dioxide 60 A second process of preparing a mixture by mixing composite particles composed of ~65% by weight, a third process of manufacturing a fire-resistant composite yarn with the mixture, and a fourth process of manufacturing a fire-resistant fabric with the fire-resistant composite yarn am.

In addition, when preparing the mixture in the second process, 80 to 85 parts by weight of the aramid nitrogen-containing polymer resin, 71 to 75 parts by weight of the carbon fiber, 0.1 to 0.5 parts by weight of the composite particles based on 100 parts by weight of the cellulose silicate fiber. In the case of manufacturing the refractory fabric in the fourth process, it is characterized by further coating the surface of the refractory composite yarn with a mixed solution composed of fumed silica, strong base dissolved water, and a surfactant.

This fire resistant fabric is manufactured by the above manufacturing method, and has fire resistance to withstand a high temperature of 1700 to 2200 ° C.

The technical problems to be achieved by the present invention are not limited to the technical problems mentioned above, and other technical problems not mentioned can be clearly understood by those of ordinary skill in the art to which the present invention belongs from the description below. There will be.

According to the present invention, it has waterproof, smoke-proof effect and mechanical durability, and has excellent heat dissipation effect as it is strong even at a high temperature of 1700 to 2200 ° C. Provided is a fire resistant fabric that can be used for various functional garment fabrics, including clothing and work clothes.

1 is a view showing a manufacturing process diagram of a refractory fabric using a carbon fiber according to Example 1 of the present invention.
2 is a view showing a manufacturing process diagram of a refractory fabric using a carbon fiber according to Example 2 of the present invention.

Hereinafter, the present invention will be described in detail, and detailed descriptions of well-known functions and configurations that may unnecessarily obscure the gist of the present invention will be omitted.

The fire resistant fabric using the carbon fiber of the present invention is characterized by including cellulose silicate fiber, aramid nitrogen-containing polymer resin, carbon fiber, and composite particles composed of titanium dioxide and silicon dioxide. There is no problem with using it for sheets and heat-dissipating curtains, but it is thick enough to be used for heat-resistant gloves, fire-fighting suits, heat-dissipating clothes, welding clothes, heat-dissipating curtains for residential spaces, and flame-resistant sound-absorbing wallpaper that require a certain amount of flexibility. Inappropriate problems arise. Accordingly, the inventors of the present invention derive a specific mixing ratio of the materials to solve the above problems, and based on 100 parts by weight of the cellulose silicate fiber, 80 to 85 parts by weight of the aramid nitrogen-containing polymer resin, 71 to 75 parts by weight of the carbon fiber It is found that it is most suitable to contain 0.1 to 0.5 parts by weight of the composite particles by weight, and through this, it has a waterproof, smoke-retardant effect, and mechanical durability. This soft and comfortable fit makes it possible to provide a fire-resistant fabric that can be used for various functional clothing fabrics, including heat-resistant clothing such as firefighting clothing, protective clothing, and work clothes.

As used herein, the term “fire endurance” means a property to withstand fire or high temperature.

Hereinafter, the fire resistant fabric of the present invention will be described in detail as follows.

The fire resistant fabric using the carbon fiber of the present invention is characterized by including cellulose silicate fiber, aramid nitrogen-containing polymer resin, carbon fiber, and composite particles composed of titanium dioxide and silicon dioxide.

(1) Cellulose Silicate Fiber

Cellulose silicate fibers are known to have remarkable fire resistance, excellent heat resistance, no melting even at high temperatures of 1000° C. or higher, superior strength retention compared to other materials even after receiving heat, and no itchiness.

(2) Aramid nitrogen-containing polymer resin

Aramid nitrogen-containing polymer resin is a material with increased durability, mechanical strength, impact resistance, flame resistance, flame retardancy and flame resistance.

This aramid nitrogen-containing polymer resin is characterized in that it contains 80 to 85 parts by weight based on 100 parts by weight of the cellulose silicate fiber, in which case the content of the aramid nitrogen-containing polymer resin is less than 80 parts by weight. It is difficult to show the characteristics of the polymer resin itself, and when it contains more than 85 parts by weight, the content is relatively high, so the mixing ratio with the cellulose silicate fiber does not match, and the final product, the refractory fabric, is produced too stiff and functional. There is a fear that the user body as a clothing fabric may become difficult.

(3) carbon fiber

Carbon fiber is a material called carbonized fiber, which is a fiber produced by carbonizing a natural compound such as cellulose containing carbon and a compound such as acrylic fiber, vinylon, and pitch. It has great heat resistance and impact resistance, is lighter than metal, and has superior elasticity and strength compared to metal.

This carbon fiber is characterized in that it contains 71 to 75 parts by weight based on 100 parts by weight of the cellulose silicate fiber, wherein when the content of the carbon fiber is less than 71 parts by weight, it is difficult to further increase the heat resistance, and it is more than 75 parts by weight. When the content is relatively high, the fabric itself becomes thick, which reduces flexibility, wearability, and activity, which may make it unsuitable for use in various applications.

(4) composite particles

Composite particles are made of titanium dioxide and silicon dioxide to add flame retardancy. Here, flame retardancy means a property that burns in a flame but burns hard outside the flame, and usually goes out by itself.

The composite particles are characterized in that they contain 0.1 to 0.5 parts by weight based on 100 parts by weight of the cellulose silicate fiber, wherein when the content of the composite particles is less than 0.1 parts by weight, a higher flame retardant effect according to the additional material is difficult to obtain, and when it is contained in excess of 0.5 parts by weight, the dispersibility of the composite particles in the resin is lowered because the content is relatively high, making it difficult to obtain the desired fire resistance.

In addition, the composite particles are characterized in that the titanium dioxide and the silicon dioxide are composed of 35-40 wt% and 60-65 wt%, in this case, when the weight % of the titanium dioxide and the silicon dioxide is out of each weight%, the dispersibility is poor It becomes difficult to add increased flame retardancy.

As the raw material of the titanium dioxide, titanium tetraethoxide, titanium tetra-n-propoxide, titanium tetra-i-propoxide (tetraisopropyl titanate), titanium tetra-n-butoxide, titanium tetra- In addition to titanium alkoxides such as sec-butoxide, titanium tetra-tert-butoxide, and tetra(2-ethylhexyl) titanate, diethoxytitanium bisacetylacetonate, dipropoxytitanium bisacetylacetonate, dibutoxytitanium bisacetyl Chelate compounds, such as acetonate, are also mentioned.

As the raw material of silicon dioxide, for example, tetramethoxysilane, tetraethoxysilane, methyltrimethoxysilane, methyltriethoxysilane, octamethylcyclotetrasiloxane, dimethyldimethoxysilane, γ-glycidoxypropyltri Methoxysilane, β-(3,4-epoxycyclohexyl)ethyltrimethoxysilane, vinyltrimethoxysilane, N-β(aminoethyl)γ-aminopropyltrimethoxysilane, N-β(aminoethyl) In addition to silicon alkoxides such as γ-aminopropylmethyldimethoxysilane, γ-aminopropyltriethoxysilane, acryloylpropyltrimethoxysilane, and methacryloylpropyltrimethoxysilane, silicone oils such as polymethylsiloxane, etc. this is used

The titanium dioxide may have any crystal structure of a rutile type or an anatase type. The ratio of the rutile type and the anatase type varies depending on the treatment temperature and the like, and in general, when a high temperature treatment is performed, the ratio of the rutile type increases, and when a low temperature treatment is performed, the ratio of the anatase type increases. In addition, titanium dioxide may contain only any one of the crystal structure of a rutile type and an anatase type.

(5) Additional mixed solution (optional)

The fire resistant fabric of the present invention may further include a mixed solution consisting of strong base dissolved water, fumed silica, and surfactant in addition to the above materials in order to increase fire resistance.

To explain, the strong base dissolved water is used to dissolve the following fumed silica to improve spreadability and at the same time to prevent hardening during the preparation of the composition, and is composed of water and a strong base. In this case, it is preferable to use at least one of KOH and NaOH as the strong base. In particular, the strong base is characterized in that it is dissolved in a hydrophilic solvent such as water to further increase the dispersibility and reaction efficiency of the fumed silica, and in this case, the water and the strong base are 1: 0.5 to 1.0 by weight. It is most suitable to be made, and if the content of water is excessively high outside the above weight ratio, the solid rate is rather low, making it difficult to obtain the desired efficacy of the present invention. There is a risk that the phenomenon may occur.

The fumed silica is a white, large surface area and high-purity silicon compound, and serves as a blowing agent in the present invention.

In other words, the fumed silica forms silicon dioxide molecules upon combustion, which is a mechanism that forms particles in a condensation process and forms agglomerates in the form of glass bubbles to form a final foaming type.

Fumed silica having such characteristics is dissolved when applied as a component of the composition, and at this time, it is preferable to use a small-sized raw material, which is because the smaller the size, the better it dissolves in NaOH and KOH. It is preferable that the average diameter of the basic particles of the fumed silica used in the fumed silica is 7 to 40 μUm in size.

The surfactant lowers the surface tension of the painted surface and serves to bring the smoothness of the painted surface, and there are anionic and cationic surfactants, and alkaline surfactants are often used. There are many types, and two or more types may be mixed and used.

This additional mixed solution is characterized in that the fumed silica, strong base dissolved water, and the surfactant are in a weight ratio of 1: 2 to 3: 0.01 to 0.1. It becomes difficult to add or the solids ratio is low, making it difficult to add additional fire resistance to the refractory fabric surface layer.

Hereinafter, the method for manufacturing a fire resistant fabric using the carbon fiber of the present invention based on the reference shown in FIGS. 1 and 2 will be described in detail as follows.

1. First step: cellulose silicate fiber production (S10)

In this process, cellulose silicate fiber is produced, and after mixing one or more cellulose components of natural pulp, natural cotton, or sawdust with a hydrated sodium silicate solution or hydrated potassium silicate solution, 100 to 150 for 10 to 20 hours After heating at ℃, sulfuric acid or hydrochloric acid is added to prepare cellulose silicate fibers.

First, the cellulose component and sodium silicate oxidized aqueous solution or potassium silicate oxidized aqueous solution are mixed.

At this time, the sodium silicate oxidized aqueous solution or potassium silicate oxidized aqueous solution is prepared by oxidizing water glass, which is an aqueous solution of sodium silicate or potassium silicate, with an oxidizing agent. The mixture was heated at 100 to 150° C. for 10 to 20 hours to prepare a mixture of alkali metal lignin cellulose polymer and sodium silicate. Then, sulfuric acid or hydrochloric acid is added to the alkali metal lignin cellulose polymer and the hydrated sodium silicate mixture, and then purified and dehydrated to obtain a cellulose silicate polymer connected to oxygen. The cellulose silicate polymer is spun using a synthetic resin binder, dried and wound to form the cellulose silicate fiber.

2. second process; Mixture preparation (S20)

In this process, the cellulose silicate fiber of the first process, the aramid nitrogen-containing polymer resin, carbon fiber, and composite particles composed of titanium dioxide and silicon dioxide are mixed, but based on 100 parts by weight of the cellulose silicate fiber, the aramid nitrogen-containing polymer resin 80 -85 parts by weight, 71 to 75 parts by weight of the carbon fiber, and 0.1 to 0.5 parts by weight of the composite particles are mixed to prepare a mixture, which is an optimal condition for achieving the object of the present invention.

3. third process; Manufactured by refractory composite (S30)

In this process, it is characterized in that the refractory composite yarn is manufactured from the mixture.

At this time, the refractory composite yarn is manufactured by a honta-myeon process, a carding process, a rolling process, a roving process, a spinning process, a wet-weather process, a winding process, a braiding and twisting process, and finally a process of rewinding.

To explain, if the mixture is first mixed, a wrap is formed with the mixture by going through a process.

Then, as a carding process, the lap produced in the honta-myeon process is put into a card machine, the fibers are first arranged to form a sliver wrap, and this is performed 2-3 times to remove contaminants and uniformly align the fibers. Sliver is produced.

Then, in the combing process, 12 to 14 strands of the sliver produced in the carding process are mixed again to remove the short fibers, neps, and foreign matter cut in the carding process to produce a combed yarn with greater tension. A sliver with good evenness is manufactured so that

Then, a thinner sliver is prepared by stretching while mixing 4 to 5 strands of the sliver in the face milling process in a drawing process.

Then, the sliver manufactured in the softening process is further stretched by a roving process to produce a roving while giving a slight twist.

Then, in the spinning process, the yarn produced in the spinning process is drawn to the required thickness and entangled in three dimensions while twisting to increase cohesive force between the fibers to produce a yarn in which the strength of the yarn is maintained.

Then, in the water conditioning and winding process, the yarn manufactured in the spinning process is rewound on a cone, spool, or bobbin depending on the purpose of use while taking a surprise attack to maintain the process moisture content. will give

Then, in the braiding and twisting process, in order to increase the strength of the thread manufactured in the raid and winding process, two or more threads are twisted while doubling.

Finally, the re-winding process is a process of winding the yarn back on a bobbin, spool or cone while making a raid to maintain the state of the yarn manufactured in the braiding and twisting process.

4. 4th process; Refractory fabric manufacturing (S40)

In this process, the fire resistant fabric is manufactured in the present invention by using the fire resistant composite yarn prepared as described above.

At this time, the fire resistant fabric is soft to the touch and comfortable to wear, so that it can be used for various functional clothing fabrics including heat-resistant clothing such as firefighting clothing, supplementary clothing, and work clothes.

In addition, as shown in FIG. 2 , the fire resistant fabric may be prepared by coating a mixed solution on the surface of the fire resistant composite yarn prepared in the third step in order to additionally add fire resistance.

As used herein, the term “coating” refers to giving various effects by coating a specific material on the surface of the fire-resistant composite yarn, and the specific material refers to the above-described mixed solution in this specification, and the effect is fire resistance, etc.

The coating includes coating methods for various fabrics known in the art, and preferably, knife coating, roller coating, calendar coating, air knife coating, free guest coating, extrusion coating, curtain coating, spray coating or powder coating, more preferably the knife coating is a floating knife coating, a knife over roll coating, a blanket knife coating, and an inverted knife coating, and the roller coating is a direct roll coating, a reverse roll coating, These are gravure roll coating, gas roll coating and deep roll coating. Most preferably, a knife coating, roller coating or spray coating method is used, and preferably, the coating is preferably carried out to a thickness of 0.5 to 1.0 mm.

The fire resistant fabric manufactured in this way has a waterproof, smoke-retardant effect, and mechanical durability, and is particularly strong at a high temperature of 1700 to 2200 ° C. , can be used for various functional clothing fabrics, including work clothes.

Hereinafter, the present invention will be described in more detail with reference to Examples and Experimental Examples, but these Examples and Experimental Examples are for illustrative purposes only and are not intended to limit the protection scope of the present invention.

<Example 1> Preparation of refractory fabric 1 of the present invention

After mixing the same amount of cellulose component mixed with natural pulp, natural cotton, and sawdust in a 1:1:1 weight ratio with a hydrated sodium silicate solution, it is heated at 100-150°C for 10-20 hours, and then hydrochloric acid is added to the cellulose silicate fiber. was prepared.

80 g of aramid nitrogen-containing polymer resin, 71 g of carbon fiber, and 0.5 g of composite particles (35 wt% of titanium dioxide, 65 wt% of silicon dioxide) were mixed with 100 g of the cellulose silicate fiber thus prepared to prepare a mixture.

After the mixture is prepared as a refractory composite yarn through a process of honta-myeon process, carding process, softening process, roving process, spinning process, raid process, winding process, braiding and twisting process, and finally rewinding, it is used for fireproofing The fabric was made.

<Example 2> Preparation of refractory fabric 2 of the present invention

Refractory fabric 2 was prepared in the same manner as in Example 1, but by spray-coating the refractory composite yarn with the following mixed solution to a thickness of 1.0 mm.

(Preparation of mixed solution)

Distilled water was put into the mixing tank first, and then measured in the same amount as distilled water in which NaOH, a strong base, was first added, and then the electric mixer was rotated at 500 RPM or less until complete dissolution to prepare strong base dissolved water. Then, fumed silica having a particle size of 30 μUm was added to the strong base dissolved water, and then the electric mixer was rotated at 500 RPM or less to prepare a fumed silica melt. After the surfactant was added to the prepared fumed silica melt, a mixed solution was prepared by mixing at 500 RPM or less for at least 10 minutes. At this time, the mixing ratio of the fumed silica, strong base dissolved water, and surfactant was 1: 2: 0.01 weight ratio was prepared by mixing.

<Comparative Example 1> Refractory fabric 3 production

Prepared in the same manner as in Example 1, but when preparing the mixture, 70 g of aramid nitrogen-containing polymer resin, 70 g of carbon fiber, and 1 g of composite particles (titanium dioxide 30% by weight, silicon dioxide 70% by weight) were mixed with 100 g of the cellulose silicate fiber. After that, a final refractory fabric 3 was prepared.

<Comparative Example 2> Production of refractory fabric 4

It was prepared in the same manner as in Example 2, but when the mixed solution was prepared, the mixing ratio of the fumed silica, the strong base dissolved water, and the surfactant was 2 : 1 : After mixing at a weight ratio of 0.01, a final refractory fabric 4 was prepared.

<Comparative Example 3> Production of fireproof fabric 5

Prepared in the same manner as in Example 1, but when preparing the mixture, 88 g of aramid nitrogen-containing polymer resin, 77 g of carbon fiber, and 2 g of composite particles (titanium dioxide 30% by weight, silicon dioxide 70% by weight) were mixed with 100 g of the cellulose silicate fiber. After that, a final refractory fabric 5 was prepared.

<Comparative Example 4> Production of fireproof fabric 6

It was prepared in the same manner as in Example 1, but the composite particles were composed of 50% by weight of titanium dioxide and 50% by weight of silicon dioxide to prepare a final refractory fabric 6 .

<Experimental Example 1> Confirmation of durability, fire resistance, waterproof, smoke-proof effect and fit

1. Experimental method

(durability)

Using a household washing machine (diameter 50 cm, depth 27 cm or more), the water temperature was maintained at 40±3° C., and 1 g of neutral detergent was added per 1 liter of water. Washing was carried out with a tumble dryer after washing 5 times, washing time 30 minutes, rinsing twice, dehydration once. (Good durability-○, Normal durability-△, Poor durability-X)

After the washing was completed, the following fire resistance was checked.

(fire resistance)

A thermal stability test was based to confirm the fire resistance. In other words, the test oven is a hot air circulation oven as described in ISO 17439. Standard Test Method ASTM D 751 for Coated Fabrics Using a Process for Anti-Resistance at High Temperatures:

- A glass plate measuring 100 mm x 100 mm x 3 mm (4 in x 4 in x 1/8 in) was used.

- Tested at 1000 ℃, 1500 ℃, 2000 ℃ temperature.

- The specimen was cooled for at least 1 hour after the glass plate was removed from the oven.

- Any side of the sample that sticks to the glass plate, sticks to itself when unfolded, or shows evidence of melting or dripping is considered meltable. Any sample side without evidence of a meltable side was considered thermally stable.

(Waterproof)

The waterproof effect is confirmed by the immersion pressure test. Water is added to one side of the test piece (fireproof fabric treated at 1500°C above), and the other side of the test piece is observed as an indication of the penetration of water through it. is composed

The test specimen was clamped and sealed between rubber gaskets in a fixture holding the test piece. The fabric surface of the test standard was opened upwards towards the atmosphere to contact the water and closely observe the other side. Air was removed from the interior of the fixture and pressure was applied to the inner surface of the test piece over an area of 30 inches (762 cm), such as water applied thereto. The water pressure on the test piece was regulated by an inline valve and increased to approximately 34 kPa (005 psi) by a pump connected to a water reservoir, as indicated by an appropriate gauge.

The fabric surface of the test piece was closely observed for the appearance of any water applied through the material. Water observed on the surface is interpreted as a leak. The sample surface was observed at the test pressure for 1 minute, and the number of leaks was measured and recorded. If no leaks are observed for 1 min, the material is considered waterproof.

(Smoke-gas toxicity test)

The rat was placed in an enclosed space surrounded by fireproof fabric (fireproof fabric treated at 1500℃ above) and gas was sprayed outside the space to confirm the smoke-retardant effect. Confirmed.

(feeling of wear)

Each firefighting suit pants were manufactured using each fire-resistance fabric, and the fit was evaluated for 12 hours for a total of 40 firefighters, 10 each. It was evaluated in such a way that the questionnaire items were answered on a 5-point scale (the higher the score, the better).

2. Experimental results

As a result of the above experiment, it was shown in Table 1 below.

durability fire resistance Waterproof smoke free fit Example 1 ○ Thermal stability (1500℃) no leaks 15 minutes 5 Example 2 ○ Thermal stability (2000℃) no leaks 15 minutes 5 Comparative Example 1 △ Slightly stuck to the glass (1500℃) leaks 5 minutes 2 Comparative Example 2 ××℃) Slightly stuck to the glass (1500℃) Some leaks 7 minutes 3 Comparative Example 3 ○ Thermal stability (2000℃) no leaks 15 minutes One Comparative Example 4 △ Slightly stuck to the glass (1500℃) Some leaks 8 minutes 3

As shown in Table 1, the fire resistant fabrics of Examples 1 and 2 of the present invention exhibited thermal stability, waterproofing, and smoke-retardant effects even at high temperatures of 1500° C. or higher after machine washing treatment, and it was confirmed that they also had washing durability, On the other hand, the fire resistance fabric 3 of Comparative Example 1 showed fire resistance at 1000°C or higher due to the difference in the mixing ratio of the materials, but the fire resistance was somewhat higher at 1500°C or higher. It was confirmed that the waterproof and smoke-retardant effects were different from those of the present invention. In addition, the fabric itself was stiff and complained of discomfort to the movement.

In the case of Comparative Example 2, after the machine washing treatment, the durability was lowered, and the coating state of the additional mixed solutions was somewhat deteriorated, so that the coating was peeled off or some damage to the fabric surface was caused. .

In the case of Comparative Example 3, the overall efficacy was the same as in Example 1, but it was confirmed that the material was too stiff to use for clothing, and in Comparative Example 4, the dispersibility was poor, and the durability or fire resistance was poor. It was confirmed that it did not appear evenly throughout, so there were some places where it was stuck, and there was also a leak.

As described above, according to the present invention, it has waterproof, smoke-retardant effect, mechanical durability, and is particularly strong at high temperature of 1700 to 2200 ° C. , a fire resistant fabric that can be used for various functional clothing fabrics, including work clothes, may be provided.

The present invention has been looked at with a focus on preferred embodiments, and those of ordinary skill in the art to which the present invention pertains will implement embodiments other than the detailed description of the present invention within the essential technical scope of the present invention. will be able Here, the essential technical scope of the present invention is indicated in the claims, and all differences within the scope equivalent thereto should be construed as being included in the present invention.

Claims (7)

delete delete delete After mixing the cellulose component in which natural pulp, natural cotton, and sawdust in a 1:1:1 weight ratio with a hydrated sodium silicate solution or hydrated potassium silicate solution, it is heated at 100-150°C for 10-20 hours, followed by sulfuric acid or a first step of preparing cellulose silicate fibers by adding hydrochloric acid;
A second step of preparing a mixture by mixing the composite particles composed of cellulose silicate fiber, aramid nitrogen-containing polymer resin, carbon fiber, and 35-40 wt% of titanium dioxide and 60-65 wt% of silicon dioxide of the first step;
A third process of producing a refractory composite yarn with the mixture, and
Fumed silica having a particle size of 7 to 40 μUm on the surface of the fire-resisting composite yarn, water and strong base dissolved water in a weight ratio of 1: 0.5 to 1.0, surfactant 1: 2 to 3: Mix consisting of 0.01 to 0.1 weight ratio A fourth process of manufacturing a fire resistant fabric having water resistance while having fire resistance to withstand a high temperature of 1700 to 2200 ° C by coating the solution to a thickness of 0.5 to 1.0 mm;
When preparing the mixture in the second process, based on 100 parts by weight of the cellulose silicate fiber, 80 to 85 parts by weight of the aramid nitrogen-containing polymer resin, 71 to 75 parts by weight of the carbon fiber, and 0.1 to 0.5 parts by weight of the composite particles. characterized by being
A method for manufacturing a refractory fabric using carbon fiber.
delete delete It is manufactured by the manufacturing method of claim 4, and has fire resistance to withstand a high temperature of 1700 to 2200 ° C.
Fireproof fabric using carbon fiber.

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