KR102177965B1 - Composition for mineral wool and mineral wool manufactured thereof - Google Patents

Abstract

The present invention is 35 to 40 parts by weight of SiO ₂ , 16 to 22 parts by weight of Al ₂ O ₃ , 0.5 to 1.5 parts by weight of iron oxide (including at least one of FeO and Fe ₂ O ₃ ), 25 to 35 parts by weight of CaO, 7.5 to 12 parts by weight of MgO, and 1 to 4 parts by weight of R ₂ O (including at least one of Na ₂ O and K ₂ O), and the weight ratio of (Al ₂ O ₃ +MgO)/CaO is 0.95 to 1.15, (CaO+MgO+Na ₂ O+K ₂ O)/(SiO ₂ +Al ₂ O ₃ +Fe ₂ O ₃ ) It relates to a composition for producing mineral wool having a weight ratio of 0.64 to 0.77.

Description

Composition for manufacturing mineral wool and mineral wool manufactured therefrom {COMPOSITION FOR MINERAL WOOL AND MINERAL WOOL MANUFACTURED THEREOF}

The present invention relates to a composition for producing mineral wool and to a mineral wool prepared therefrom.

Mineral wool is a representative inorganic insulating material, and has excellent heat resistance and water resistance and low thermal conductivity, so it is used in various fields such as construction, industrial plant, and ship. In addition, mineral wool typically contains silica, alumina, iron oxide, calcium oxide and magnesium oxide, and is an artificial mineral obtained by melting silicate-based ores such as basalt and andesite at high temperature, and using a high-speed air current or high-speed rotation of a spinner It is a fiber.

On the other hand, mineral wool is usually produced and manufactured in a plate shape or for spraying. In particular, unlike a plate-shaped product, the mineral wool for spraying needs to improve the elasticity of the fiber, that is, fiber resilience, in order to control the construction thickness and improve the adhesion performance when used.

In this regard, in Korean Patent Registration No. 996,901 (Patent Document 1), the mass ratio of alkali/alkaline earth is less than 1, the average geometric diameter of 4 μm or less, and the surface weight of 0.8 to 4.3 kg/m 2, A heat insulating component for sound insulation is disclosed. However, Patent Document 1 has a problem of lowering the water resistance and high temperature stability due to the low content of CaO and MgO in the mineral wool composition and low fiber elasticity of the composition and high K ₂ O and Na ₂ O content.

Accordingly, there is a need for research and development on a composition for manufacturing mineral wool having excellent resilience of the manufactured fiber and mineral wool manufactured therefrom.

Korean Patent Registration No. 996,901 (published on February 16, 2007)

Accordingly, the present invention is to provide a composition for producing mineral wool that can produce mineral wool having excellent fiber resilience, and a mineral wool that is prepared from the composition and has improved adhesion performance and is suitable for spraying.

The present invention is 35 to 40 parts by weight of SiO ₂ , 16 to 22 parts by weight of Al ₂ O ₃ , 0.5 to 1.5 parts by weight of iron oxide (including at least one of FeO and Fe ₂ O ₃ ), 25 to 35 parts by weight of CaO, 7.5 to 12 parts by weight of MgO, and 1 to 4 parts by weight of R ₂ O (including at least one of Na ₂ O and K ₂ O), and the weight ratio of (Al ₂ O ₃ +MgO)/CaO is 0.95 to 1.15 , (CaO+MgO+Na ₂ O+K ₂ O)/(SiO ₂ +Al ₂ O ₃ +Fe ₂ O ₃ ) It provides a composition for preparing mineral wool in a weight ratio of 0.64 to 0.77.

In addition, the present invention provides a mineral wool prepared from the composition for producing the mineral wool.

The mineral wool prepared from the composition for producing mineral wool according to the present invention has excellent fiber resilience and improves adhesion, so it is very suitable for spraying. In addition, the mineral wool fiber has improved solubility in artificial bodily fluids, thereby reducing harmfulness to the human body, and is suitable for use at high temperatures due to a low heating pre-contraction rate.

Hereinafter, the present invention will be described in detail.

Mineral wool Composition for manufacturing

The composition for preparing mineral wool according to the present invention includes 35 to 40 parts by weight of SiO ₂ , 16 to 22 parts by weight of Al ₂ O ₃ , 0.5 to 1.5 parts by weight of iron oxide (including at least one of FeO and Fe ₂ O ₃ ), 25 to 35 CaO by weight, 7.5 to 12 parts by weight of MgO, and 1 to 4 parts by weight of R ₂ O (including at least one of Na ₂ O and K ₂ O).

SiO ₂

SiO ₂ is a network former oxide that serves to form the basic skeleton of glass.

The content of SiO ₂ is related to the fiber resilience of the fabricated fiber, and it is necessary to properly control the fiber resilience of the fabricated fiber. Specifically, the SiO ₂ may be included in the composition in an amount of 35 to 40 parts by weight. For example, the SiO ₂ may be included in the composition in an amount of 36 to 39 parts by weight. When the content of SiO ₂ is within the above range, the problem that the diameter of the fiber prepared from the composition containing the same is too large is prevented, and the heat resistance of the fiber is improved.

Al ₂ O ₃

Al ₂ O ₃ is an intermediate oxide that serves to improve the biodegradability and thermal properties of the composition containing the same and the elasticity of the fibers produced therefrom. In addition, depending on the coordination number of Al ³⁺ , some may replace the role of SiO ₂ or serve as a modifier oxide, which may vary depending on the content of other modified oxides.

The Al ₂ O ₃ may be included in the composition in an amount of 16 to 22 parts by weight. For example, the Al ₂ O ₃ may be included in the composition in an amount of 19 to 21.5 parts by weight. When the content of Al ₂ O ₃ is within the above range, there is an effect of improving the elasticity and thermal properties of the fibers prepared from the composition containing the same.

Iron oxide ( FeO And Fe ₂ O ₃ Including at least one or more)

Iron oxide serves to improve the heat resistance of the mineral wool prepared from the composition containing the same.

For example, the iron oxide may include Fe ₂ O ₃ .

When the content of iron oxide is increased, the heat resistance of the produced fiber is improved, the meltability is lowered, and the roughness of the fiber is roughened, so it is necessary to adjust it to an appropriate content. Specifically, the iron oxide may be included in the composition in an amount of 0.5 to 1.5 parts by weight. For example, the iron oxide may be included in the composition in an amount of 0.7 to 1.3 parts by weight. When the content of iron oxide is within the above range, there is an effect of improving the heat resistance of the fiber prepared from the composition containing the same.

CaO

CaO acts as a fluxing agent as a modifier oxide, and serves to improve the durability of fibers manufactured from a composition containing the same.

The CaO may be included in the composition in an amount of 25 to 35 parts by weight. For example, the CaO may be included in the composition in an amount of 26 to 33 parts by weight, or 26 to 30 parts by weight. When the content of CaO is within the above range, it is possible to prevent the problem of deteriorating elasticity due to excessively improved brittleness of the fiber prepared from the composition containing the same, a problem of lowering heat resistance, and a problem of insufficient melt viscosity.

MgO

MgO acts as a fluxing agent as a modifier oxide, and serves to increase the elasticity of fibers prepared from a composition containing the same.

The MgO may be included in the composition in an amount of 7.5 to 12 parts by weight. For example, the MgO may be included in the composition in an amount of 8 to 11.5 parts by weight. When the content of MgO is within the above range, the elasticity of the produced fiber is increased, so that the fiber resilience is excellent, and a problem of insufficient melt viscosity can be prevented.

R ₂ O ( Na ₂ O And K ₂ O Including at least one or more)

R ₂ O is a modified oxide, which generates non-crosslinked oxygen of the glass so that melting is smoothly performed during melting, and serves to improve the biodegradability of fibers.

As the content of R ₂ O increases, the meltability of the manufactured fiber is improved, but it is necessary to appropriately adjust it in consideration of the biodegradability-based resilience of the manufactured fiber. Specifically, the R ₂ O may be included in the composition in an amount of 1 to 4 parts by weight. For example, the R ₂ O may be included in the composition in an amount of 2 to 4 parts by weight. When the content of R ₂ O is within the above range, it is difficult to melt the composition containing the same, which consumes a lot of melt energy, as well as a problem in which the flexibility of the manufactured fiber is decreased and the possibility of occurrence of unfibrillated particles is increased due to the high melt viscosity, And it is possible to prevent the problem of insufficient water resistance and high temperature stability of the produced fiber.

The composition for preparing the mineral wool has a weight ratio of (Al ₂ O ₃ + MgO)/CaO of 0.95 to 1.15. When the weight ratio of the (Al ₂ O ₃ + MgO)/CaO is within the above range, the elasticity of the manufactured fiber is improved, and thus fiber resilience is excellent. In addition, when the weight ratio of (Al ₂ O ₃ + MgO) / CaO is less than 0.95, a problem of insufficient fiber resilience of the manufactured fiber may occur, and when the weight ratio is more than 1.15, the content of Al ₂ O ₃ and MgO Low CaO may cause an increase in the fiberization temperature of the mineral wool composition and an increase in raw material cost.

The composition for manufacturing the mineral wool may have a weight ratio of (CaO+MgO+Na ₂ O+K ₂ O)/(SiO ₂ +Al ₂ O ₃ +Fe ₂ O ₃ ) of 0.64 to 0.77. When the (CaO+MgO+Na ₂ O+K ₂ O)/(SiO ₂ +Al ₂ O ₃ +Fe ₂ O ₃ ) weight ratio is within the above range, the biodegradability, resilience, heat resistance, and fiber roughness of the manufactured fiber Is properly adjusted.

On the other hand, the composition for preparing mineral wool may contain components such as TiO ₂ , SO ₂ , P ₂ O ₅ as impurities, depending on the raw material included, and the content is 3 parts by weight or less based on 100 parts by weight of the composition. Maintaining it is preferable because it does not affect the physical properties of the manufactured fiber.

Mineral wool

In addition, the mineral wool according to the present invention is prepared from the composition for producing mineral wool as described above. The mineral wool is very suitable for spraying by improving the adhesion performance due to excellent fiber resilience.

For example, the mineral wool may have a maximum height of 500 ml or more when the fibers are mixed with 25 g of fibers and 1 liter of water and then settled in a 1 liter measuring cylinder. When the maximum height is 500 ml or more, there is an excellent effect of resilience of the mineral wool fibers.

In addition, the mineral wool may have a dissolution rate constant of 300 ng/cm 2·hr or more for an artificial body fluid. When the dissolution rate constant of the mineral wool in the artificial body fluid is 300 ng/cm 2··hr or more, there is an effect of having excellent salt solubility.

In addition, the mineral wool may have a heating pre-contraction ratio of 5% or less.

Furthermore, the present invention provides a mineral wool composition for spraying comprising the mineral wool as described above.

The composition may further include an organic binder or an inorganic binder to improve the sprayability of the fibers, and the organic or inorganic binder is not particularly limited as long as it is commonly used for building materials.

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

However, these examples are only intended to aid understanding of the present invention, and the scope of the present invention is not limited to these examples in any sense.

[ Example ]

Example 1 to 6 and Comparative example 1 to 7. Mineral wool Produce

Using an electric furnace equipped with a three-phase graphite electrode, a composition for preparing mineral wool was prepared by mixing the components so as to have the compositions shown in Tables 2 and 3 below by a melting method of an electric current method. Thereafter, the composition for producing mineral wool was introduced into the existing spinning process for producing mineral wool (a method in which the melt was dropped on the surface of a spinner in the form of a disk that rotates centrifugally to stretch the fiber, and at the same time, the fiber was turned into fiber by spraying high-pressure air from the rear side). Thus, mineral wool was prepared.

The composition for preparing the prepared mineral wool and the physical properties of the mineral wool prepared by the above method were measured by the following method, and the results are shown in Tables 2 and 3.

Test example One: Degree of restoration

25 g of fibers of Examples 1 to 6 and Comparative Examples 1 to 7 were mixed with 1 L of water and pulverized for 30 seconds at 11,000 rpm using a grinder to obtain an average length of 5 mm. Thereafter, the pulverized product was put in a 1L measuring cylinder, mixed, and held for 15 minutes to measure the maximum height of fibers accumulated from the bottom of the measuring cylinder. The degree of restoration of the fibers was evaluated as the ratio of the maximum height of the fibers to the total height of water, and the results are shown in Table 1.

Test example 2: dissolution rate constant ( K _dis )

In order to evaluate the biodegradability of the prepared fiber, the solubility of the artificial body fluid was calculated as follows.

Specifically, the biodegradability of ceramic fibers in the body is evaluated based on the solubility of the fibers in the artificial body fluid. After comparing the residence time in the body based on the solubility, the dissolution rate constant (K _dis ) using the following equation (1) Was calculated.

In Equation 1, d ₀ is the initial average fiber diameter (µm), ρ is the initial density (g/cm 3) of the fiber, M ₀ is the initial fiber mass (mg), and M is the mass of the remaining fiber after being dissolved. (Mg), and t is the experiment time (hr).

At this time, the dissolution rate was determined by placing the mineral wool prepared in Examples and Comparative Examples between a thin layer between 0.2 μm polycarbonate membrane filters fixed with a plastic filter support and filtering the artificial bodily fluid through these filters. Was measured. During the experiment, the temperature of the artificial body fluid was continuously adjusted to 37° C., the flow rate was adjusted to 135 mL/day, and the pH was maintained at 4.5 using hydrochloric acid (HCl, 35.0-37.0%).

)를 계산하였으며, 그 결과를 표 2 및 3에 나타내었다.In order to accurately measure the solubility of the fiber that occurs over a long period of time, the fiber is leached for 21 days, while inducing the filtered artificial body fluid at specific intervals (1 day, 4 days, 7 days, 11 days, 14 days, or 21 days) After analyzing the dissolved ions using an Inductively Coupled Plasma Spectrometer (ICP), the dissolution rate constant (

) Was calculated, and the results are shown in Tables 2 and 3.

In addition, the content (g) of the component contained in 1L of the artificial body fluid used to measure the dissolution rate of the fiber is shown in Table 1.

Components of artificial body fluids Content (g/L) NaCl 7.120 MgCl ₂ 6H ₂ O 0.212 CaCl ₂ 2H ₂ O 0.029 Na ₂ SO ₄ 0.079 Na ₂ HPO ₄ 0.148 NaHCO ₃ 1.950 Na ₂ Tartrate 2H ₂ O 0.180 Na ₃ Citrate 2H ₂ O 0.152 90% Lactic Acid 0.156 C ₂ H ₃ NO ₂ Glycine 0.118 Na-Pyruvate 0.172 HCl (for pH adjustment) 0.750

Test example 3: heating Player reduction rate

In order to measure the heating precontraction rate of the mineral wool, the mineral wool prepared in Examples and Comparative Examples was prepared as a specimen in the form of a pad, and then used in the experiment.

Specifically, 220 g of mineral wool is sufficiently sponged in 0.2% starch solution, then put in a 300 × 300 mm mold, and the sponged fibers are evenly reduced to reduce the cotton deviation, and then the starch solution is drained through the mold bottom to make a pad. I did. Thereafter, the prepared pad was sufficiently dried in an oven at 100° C. for 24 hours, and then cut into a size of 100 mm×100 mm×25 mm (width×length×thickness) to prepare a specimen. Thereafter, the measurement points were marked on the specimen using a platinum pin, and the distance between the measurement points was measured using a vernier caliper, and the specimen was placed in a furnace heated at 750° C. and heated for 1 hour and 30 minutes. Then it was cooled at room temperature. After comparing the measurement results before and after heat treatment by measuring the distance between the measurement points of the cooled specimen, the heating pre-contraction rate was calculated using Equation 2 below, and the results are shown in Tables 2 and 3 below.

In Equation 2, l ₀ is a distance between measurement points before heat treatment, and l ₁ is a distance between measurement points after heat treatment.

Example 1 Example 2 Example 3 Example 4 Example 5 Example 6 Furtherance
(Part by weight) SiO ₂ 38.2 38.2 38.3 37.1 36.6 38.4 Al ₂ O ₃ 20.1 20.5 20.2 20.2 19.2 21.3 Fe ₂ O ₃ 0.9 0.9 1.0 1.0 0.7 1.2 CaO 29.8 26.9 29.8 29.7 28.1 27.2 MgO 8.2 10.3 8.4 9.5 11.5 9.9 R ₂ O 2.8 3.2 2.3 2.5 3.9 2.0 Weight ratio (Al ₂ O ₃ + MgO)/CaO 0.95 1.15 0.96 1.00 1.09 1.12 (CaO+MgO+R ₂ O)/ (SiO ₂ +Al ₂ O ₃ +Fe ₂ O ₃ ) 0.69 0.68 0.68 0.72 0.77 0.64 Maximum fiber height (ml) 600 530 580 570 540 530 Fiber restoration degree (%) 60% 53% 58% 57% 54% 53% Dissolution rate constant (K _dis )(ng/㎠·hr) 315 321 304 320 307 350 Heating precontraction rate (%) 4.01 4.20 4.30 4.75 4.8 4.12

Comparative Example 1 Comparative Example 2 Comparative Example 3 Comparative Example 4 Comparative Example 5 Comparative Example 6 Comparative Example 7 Furtherance
(Part by weight) SiO ₂ 35.9 39.6 36.4 39.8 36.5 36.8 39.5 Al ₂ O ₃ 16.2 21.2 20.4 20.2 20.1 18.2 15.4 Fe ₂ O ₃ 0.8 1.4 1.4 1.2 0.8 0.7 1.4 CaO 36.5 23.5 32.5 29.6 27.4 29.9 28.2 MgO 8.2 10.5 5.4 6.8 12.6 13.1 11.6 R2O 2.4 3.8 3.9 2.4 2.6 1.3 3.9 Weight ratio (Al ₂ O ₃ +MgO)/CaO 0.67 1.35 0.79 0.91 1.19 1.05 0.96 (CaO+MgO+R ₂ O)/(SiO ₂ +Al ₂ O ₃ +Fe ₂ O ₃ ) 0.89 0.61 0.72 0.63 0.74 0.80 0.78 Maximum fiber height (ml) 400 450 380 410 390 370 380 Fiber restoration degree (%) 40% 45% 38% 41% 39% 37% 38% Dissolution rate constant (K _dis )(ng/㎠·hr) 247 290 323 283 314 276 240 Heating precontraction rate (%) 9.43 4.42 5.36 4.13 5.71 5.17 6.59

As shown in Table 2, it was found that the mineral wool of Examples 1 to 6 was suitable for spraying because of its excellent fiber restoration.

On the other hand, as shown in Table 3, Comparative Examples 1 and 2 containing an excess or a small amount of CaO, Comparative Examples 3 to 6 containing a small amount or an excess of MgO, and Comparative Example 7 containing a small amount of Al ₂ O ₃ The mineral wool showed a low fiber recovery degree of less than 50%. In particular, the weight ratio of (Al ₂ O ₃ +MgO)/CaO is less than 0.95, and the weight ratio of (CaO+MgO+Na ₂ O+K ₂ O)/(SiO ₂ +Al ₂ O ₃ +Fe ₂ O ₃ ) is The mineral wool of Comparative Examples 1 and 4, which was less than 0.64 or more than 0.77, had a dissolution rate constant of less than 300 ng/cm 2·hr and had insufficient biodegradability. In addition, the weight ratio of (CaO+MgO+Na ₂ O+K ₂ O)/(SiO ₂ +Al ₂ O ₃ +Fe ₂ O ₃ ) is less than 0.64 or more than 0.77, and contains an excess of MgO or Al ₂ O ₃ The mineral wool of Comparative Examples 6 and 7 had a dissolution rate constant of less than 300 ng/cm 2·hr and had insufficient biodegradability.

Claims (5)

35 to 40 parts by weight of SiO ₂ , 16 to 22 parts by weight of Al ₂ O ₃ , 0.5 to 1.5 parts by weight of iron oxide (including at least one of FeO and Fe ₂ O ₃ ), 25 to 35 parts by weight of CaO, 7.5 to 12 parts by weight As a composition for producing mineral wool comprising MgO, and 1 to 4 parts by weight of R ₂ O (including at least one or more of Na ₂ O and K ₂ O),
The weight ratio of (Al ₂ O ₃ +MgO)/CaO is 0.95 to 1.15, and the weight ratio of (CaO+MgO+ Na ₂ O+K ₂ O)/(SiO ₂ +Al ₂ O ₃ +Fe ₂ O ₃ ) is 0.64 to 0.77 Is,
A composition for producing mineral wool, having a fiber restoration degree of 50% or more of the mineral wool produced therefrom. As a mineral wool prepared from the composition for producing mineral wool of claim 1,
The mineral wool has a fiber restoration degree of 50% or more. The method according to claim 2,
The mineral wool is a mineral wool that has a dissolution rate constant of 300 ng/㎠·hr or more for an artificial body fluid. delete The method according to claim 2,
The mineral wool is mineral wool with a heating pre-contraction rate of 5% or less.