KR960012715B1 - Method and composition of rock wool - Google Patents

Abstract

The composition for a ceiling board comprises 60-80 wt. parts a granular rock wool as a major component, wherein 4-5 wt. parts starch as an organic binding agent, 7-9 wt. parts attapulgite as a binder, 0.1-0.3 wt. parts polyacrylamide as a cohesive agent, 4-27 wt. parts perlite as a filler, 0.1-0.3 wt. parts a wax emulsion, 1-2 wt. parts waste newspaper as an organic fiber, and 0.5-0.7 wt. parts an alumina sulphate. The ceiling board using rock wool including these compositions is made by dispersing the composition into water to obtain 1-9 wt. parts water slurry, dehydrating, shaping, and then drying the ceiling board.

Description

Composition for preparing rockwool ceiling plate and method

The present invention relates to a composition for manufacturing a wet rockwool ceiling plate used as an interior preparation of a building, and a method of manufacturing the same. More specifically, bentonite, an inorganic filler used in the manufacture of a rockwool ceiling plate, is attached to attapogite as a fixing agent. Attapulgite), and the composition and method for manufacturing a rockwool top plate having excellent performance by improving the physical properties such as sag, dimensional stability, and fire resistance while maintaining the strength of the product by increasing the weight part ratio of the granular rock wool will be.

Conventionally, rock wool, which is a mineral fiber, has a main component, and a solid component composed of an appropriate amount of fillers such as bentonite, organic binders such as starch, phenol resins, and pulp, and binder aids such as emulsion wax, alumina sulfate, and polyacrylamide. It is known to make a slurry by dispersing it in water of about 100 times and producing a plate-like rockwool ceiling plate by a wet seaweed method. Although the product produced by this manufacturing method improves the sag property to some extent, it does not fundamentally satisfy the sag property when used at high temperature or especially in wet seasons, and also in the process operation. There was a problem of causing contamination of the wire net and process water.

The rock wool ceiling plate manufactured by such a conventional method has a drawback in that hot shrinkage is relatively severe at high temperature, and dimensional stability is unstable.

The present invention has been devised to solve the above-mentioned drawbacks of the prior art, with 60 to 80 parts by weight of granular rock wool as a main component, 4 to 5 parts by weight of starch as an organic binder, about 7 to 9 weights as a fixing agent. Negative attapolite, 0.01 to 0. as a binding aid. 3 parts by weight of polyacrylamide (coagulant, PAA), 4 to 27 parts by weight of perlite as filler, 0.1 to 0. 0. 3 parts by weight of wax emulsion, 1 to 2 parts by weight of seaweed treated as organic fibers, and 0.5 to 0,0. The present invention relates to a composition for preparing a rockwool top plate composed of 7 parts by weight of alumina sulfate and a method for producing a rockwool top plate obtained by dispersing the composition in water to obtain 1-9 parts by weight of an aqueous slurry, and then drying the sheet by annealing, dehydrating and molding the same. This is to enable mass production of rockwool ceiling plates with improved properties such as deflection flexural failure load.

In particular, attapulgite, a double-chain structured clay used in place of bentonite in the manufacture of rockwool top plate of the present invention, is a natural product, which is difficult to be represented by a certain chemical formula, but is represented by approximately Mg ₅ Si ₈ O ₂₀ 4H ₂ O, It has a needle-like crystal structure of about 50 to 150 microns and a length of about 1 to 5 mu m, and has a property of dispersing in colloidal form in water, and its surface area swells to about 210 m 2 / g and has a high adsorption retention.

In addition, the use of attapolgite in place of bentonite in the present invention is advantageous for annealing, making it easy to manufacture a ceiling plate by wet molding, and may have excellent properties such as incombustibility, heat insulation, sound absorption, etc., which are inherent functions of rock wool.

In addition, the perlite of the present invention is used as a lightweight agent for reducing the density of the rockwool ceiling plate and also used to increase the incombustibility.

In particular, the present invention was able to improve the physical properties such as light weight, density and deflection of the rock wool ceiling plate by using attapolgite and perlite together.

In addition, starch used as an organic binder serves to maintain the physical strength of the dried product by connecting and fixing the rock wool fibers and solidifying the adhesion of the perlite particles and fibers. In particular, conventionally, methyl cellulose, carboxyl methyl cellulose, or the like was used as a fixing agent, but in the present invention, the paper used in paper was beated at a beater. The reason for using the newspaper is to soften the fiber and to make the tissues in the rock wool ceiling tightly entangled like the conventional methyl cellulose or carboxymethyl cellulose, causing synergism with attapolgite and causing sagging properties. Because it plays an important role in improving.

The rockwool ceiling plate of the present invention prepared by the wet wetting method as described above replaces bentonite as a filler in the solid component composition with attapolgite as a fixing agent, thereby reinforcing the retaining power and physical properties of the organic binder to reduce the strength of the ceiling plate. Due to the function of the needle structure of polite, not only the physical properties such as the deflection property and the bending fracture load property have been significantly improved, but the present invention enables the counter-surface production of rock wool ceiling plates.

Hereinafter, the measurement method of the physical properties in the present invention to which three specimens are applied in the present invention, the preparation method thereof, and the results thereof are shown as Examples and Table 1.

Physical property measurement method

Hereinafter, the physical properties of the rock wool ceiling plate of the present invention were measured using the three specimens as follows.

Physical property measurement method

1) deflection.

① Specimen size: 15t × 35mm × 300mm (thickness × width × length)

② Condition: The dried specimen was kept at 100 ° C. and 95% or higher relative humidity condition for 2 hours in a water batch, and then the degree of deflection was measured with a vernier teeper.

2) loss of ignition.

① Specimen size: 15t × 50㎜ × 50㎜ (thickness × width × length)

② Condition: The specimen was dried continuously for 2 hours at 105 ± 5 ℃ 30 minutes in an electric furnace of 950 ℃ and then held for 30 minutes in a desiccator (Decicator), the weight loss was measured.

3) density

① Specimen size: as product prototype

② Condition: The specimen was dried for 2 hours at 105 ± 5 ℃ in a desiccator for 30 minutes, and then weighed.

4) flexural failure load

① Specimen size: 15t × 150mm × 200mm (thickness × width × length)

② Condition: The specimen was dried in a desiccator for 30 hours in a drying machine at 105 ± 5 ℃ for 30 hours, and then the strength was measured in the flexural failure load tester. (Load speed: 50㎜ / min)

5) Dimensional stability.

① Specimen size: 15t × 35mm × 300mm (thickness × width × length)

② Condition: The specimen was dried for 2 hours in a dryer of 105 ± 5 ℃ constant standing for 6 days in a thermo-hygrostat with a dry humidity of more than 90 ℃ 32 ℃, the length change rate was measured.

Example 1

Rock wool 60 parts by weight, starch 4. 0 parts by weight, attapolgite 7. 0 parts by weight, polyacrylamide 0.3 parts by weight, alumina sulfate 0.5 part by weight, 27 parts by weight of perlite, 1 part by weight of processed paper The wax emulsion 0.2 parts by weight of the solid component is dispersed in 96 times of water, and an aqueous slurry of about 4 parts by weight of the dispersion is formed in water, which is irritated in a telescopic agitator, dehydrated and molded. After drying at 200 ° C. for 2 hours, a rockwool ceiling plate having a thickness of 15 mm was prepared, and physical properties such as deflection, ignition loss, density, bending failure load, and dimensional stability were measured. As a result of the measurement, the density was 314kg / ㎥, and the flexural failure load reached 25kgf. This result was found to be about the same level as compared to the average 25kgf during the flexural failure of the conventional rockwool ceiling plate (see Comparative Example). The physical properties of 2. 13 mm were found to be significantly superior to the conventional products. The results are shown in Table 1.

Example 2

Rock wool 65 parts by weight, attapolgite 8. 0 parts by weight, starch 4 parts by weight, polyacrylamide 0.2 parts by weight, alumina sulfate 0.5 part by weight, 21 parts by weight of perlite, 1 part by weight of newspaper The wax emulsion 0.3 parts by weight of the solid components are dispersed in 96 water of water to form an aqueous slurry of about 4 parts by weight of a dispersion, which is dehydrated and molded in a long-term agitator and dried at 200 ° C. for 2 hours. A rockwool ceiling plate having a thickness of 15 mm was prepared, and physical properties thereof were measured as in Example 1. This result was improved from Example 1 with a density of 334 kg / m 3 and a flexural failure load of 31 kgf, and also showed sag physical properties of 1.28 mm, which is superior to that of Example 1. The results are shown in Table 1.

Example 3

70 parts by weight of rock wool, 5 parts by weight of starch, 8 parts by weight of attapolgite, 0.3 parts by weight of polyacrylamide, 0.6 parts by weight of alumina sulfate, 15 parts by weight of perlite, 1 part by weight of newspaper paper treated with seaweed, wax emulsion 0. 1 part by weight of solid components are dispersed in 96 times of water to form an aqueous slurry of 4 parts by weight of dispersion, which is first annealed in a mesh press, dehydrated and shaped and dried at 200 ° C. for 2 hours to obtain a thickness of 15 A rockwool ceiling plate of mm was prepared, and physical properties were measured as in Example 1. It has a density of 331 kg / m 3, and the flexural failure load reaches 23 kgf, which is equivalent to that of Example 1, and sag properties and dimensional stability reach 0.98 mm and 0.3%, respectively, compared to Examples 1 and 2. Improved results were obtained. The reason for this is that the percentage of perlite parts is lowered, while the percentage of rock wool is used, which further improves the fiber binding force. The results are shown in Table 1.

Example 4

80 parts by weight of rock wool, 4 parts by weight of starch, 9 parts by weight of attapolgite, 4 parts by weight of perlite, 0.01 parts by weight of polyacrylamide, 0.7 parts by weight of alumina sulfate, 2 parts by weight of newspaper paper treated with seaweed, wax emulsion 0. 2 parts by weight of the solid component is dispersed in 96 times of water to form an aqueous slurry of 4 parts by weight of dispersion, which is first stirred in a permeable agitator, dehydrated and molded and dried at 200 ° C. for 2 hours. A rockwool ceiling plate having a thickness of 15 mm was prepared, and physical properties were measured as in Example 1. It has a density of 343 kg / m 3 and has a flexural failure load of 33 kgf, which is an improvement over Examples 1, 2, and 3, resulting in an increase in the binding ratio due to an increase in the fiber ratio and the adsorption retention due to the use of attapolite. Caused by. In addition, the deflection physical properties and the dimensional stability also became 0.73 mm and 0.1%, respectively, to obtain the best results among the examples. The results are shown in Table 1.

Comparative Example 1

Rock wool 45 parts, starch 10 parts by weight, bentonite 14 parts by weight, perlite 23 parts by weight, alumina sulfate 0.3 parts by weight, pulp 7 parts by weight, wax emulsion 0.3 parts by weight, phenolic resin 0.4 parts by weight of 96 After dispersing in water of drainage, and forming an aqueous slurry of 4 parts by weight of dispersion in water, it was agitated in an elongated agitator, dehydrated and molded, and then dried in a drying furnace at 200 ° C. for 2 hours to obtain a thickness of 15 A rockwool ceiling plate of mm was prepared.

As a result of measuring the physical properties of the prepared rockwool top plate as in Example 1, the density was 330kgf / m 3, the flexural fracture load was 25kgf, and the deflection property and the dimensional stability were 5 mm and 0.5%, respectively, which is not very good. Appeared.

The reason for this is due to the formation of acicular structure and the use of bentonite as a filler, without using attapolite, which has a high adsorption component, and a decrease in binding force caused by insufficient fiber ratio.

The result is shown as <Table 1>.

TABLE 1

As described above, the present invention retains excellent physical properties such as sag and flexural fracture loads, even if the organic binder is used less than the conventional product formulation ratio, by using attapolgite instead of bentonite, the fixing performance is improved and the strength is not lowered. Will be able to manufacture rock wool ceiling.

Claims (2)

In the composition for producing a mineral ceiling plate made of a filler, an organic binder and a bonding aid, 60 to 80 parts by weight of granular rock wool is used as a main component, and 4 to 5 parts by weight of starch, 7 to 9 parts by weight of attapolite, and 0.1 to 1 part. 0. 3 parts by weight of polyacrylamide, 4 to 27 parts by weight of perlite, 0.01 to 0,0. 3 parts by weight of wax emulsion, 1 to 2 parts by weight of processed island newspaper and 0.5 to 0. A composition for producing a rockwool top plate consisting of 7 parts by weight of alumina sulfate. 60-80 weight part of granular rock wools are a main component, 4-5 weight part starch, 7-9 weight part attapolite, and 0.1-0. 3 parts by weight of polyacrylamide, 4 to 27 parts by weight of perlite, 0.01 to 0,0. 3 parts by weight of wax emulsion, 1 to 2 parts by weight of processed island newspaper and 0.5 to 0. A method for producing a rockwool top plate, which is obtained by dispersing a composition for preparing a rockwool top plate composed of 7 parts by weight of diffused alumina in water to obtain 1-9 parts by weight of an aqueous slurry, and then drying and forming it by drying.