KR101748496B1 - Batch Composition for Preparing Long Glass Fiber Using Anorthite - Google Patents
Batch Composition for Preparing Long Glass Fiber Using Anorthite Download PDFInfo
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- KR101748496B1 KR101748496B1 KR1020150156669A KR20150156669A KR101748496B1 KR 101748496 B1 KR101748496 B1 KR 101748496B1 KR 1020150156669 A KR1020150156669 A KR 1020150156669A KR 20150156669 A KR20150156669 A KR 20150156669A KR 101748496 B1 KR101748496 B1 KR 101748496B1
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C13/00—Fibre or filament compositions
- C03C13/06—Mineral fibres, e.g. slag wool, mineral wool, rock wool
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C3/00—Glass compositions
- C03C3/04—Glass compositions containing silica
- C03C3/076—Glass compositions containing silica with 40% to 90% silica, by weight
- C03C3/083—Glass compositions containing silica with 40% to 90% silica, by weight containing aluminium oxide or an iron compound
- C03C3/085—Glass compositions containing silica with 40% to 90% silica, by weight containing aluminium oxide or an iron compound containing an oxide of a divalent metal
- C03C3/087—Glass compositions containing silica with 40% to 90% silica, by weight containing aluminium oxide or an iron compound containing an oxide of a divalent metal containing calcium oxide, e.g. common sheet or container glass
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C3/00—Glass compositions
- C03C3/04—Glass compositions containing silica
- C03C3/076—Glass compositions containing silica with 40% to 90% silica, by weight
- C03C3/089—Glass compositions containing silica with 40% to 90% silica, by weight containing boron
- C03C3/091—Glass compositions containing silica with 40% to 90% silica, by weight containing boron containing aluminium
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- Geochemistry & Mineralogy (AREA)
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- Glass Compositions (AREA)
Abstract
The present invention relates to a process for the production of polylactic acid which comprises, based on the total weight of all components, 8 to 42% by weight of limestone, 20 to 50% by weight of silica, 0.1 to 10% by weight of alumina, 5 to 20% by weight of limestone, And 10 to 20% by weight of nitrate.
Description
The present invention relates to a badge composition for the production of long-fiber glass using a gallstone, and more particularly to a badge composition for producing long-fiber glass, which is capable of providing a composition suitable for glass fiber, .
Long-fiber glass has been used for various purposes in various industrial fields due to its high strength, insulation, non-flammability, dimensional stability, and chemical resistance. Among them, borosilicate- or boron- glass ", and it is used as reinforcing material of plastic using the building material and electric insulation property because of excellent electrical characteristic and wind blowing property.
The long fiber glass is manufactured using pyrophyllite as a main source of silicon dioxide (SiO 2 ) and aluminum oxide (Al 2 O 3 ). Domestic reserves of pyrophyllite are abundant in comparison with other minerals, but pyroxenes of high quality, except for low quality of cement additives, are getting depleted.
Korean Patent No. 10-0917269 discloses a borosilicate-based long-fiber glass badge composition made from wave glass of a thin film transistor liquid crystal display (TFT-LCD) glass substrate. This badge composition also uses pyrophyllite as its main component. However, pyrophyllite has a disadvantage that it takes a long time to melt.
On the other hand, aluminum oxide, compared to the president seats pyrophyllite (Al 2 O 3) content of nopeumyeonseo FIG dioxide ((SiO 2) and calcium (CaO) is rich, LOI (loss on ignition) is not more than 1% and a rich reserves oxide And thus it is possible to supply and receive a stable raw material. However, since the content of impurities is high, it is not yet used as a glass raw material.
Accordingly, there is a need for a badge composition which can provide a suitable glass composition by minimizing impurities in order to use gallstone as a glass raw material instead of pyrophyllite having poor melting property.
The present invention provides a badge composition for producing long-fiber glass, which is excellent in melting property and can provide a suitable glass composition by using the existing gallstone instead of pyrophyllite.
On the other hand, the present invention relates to a process for the production of a slurry comprising 8 to 42% by weight of limestone, 20 to 50% by weight of silica sand, 0.1 to 10% by weight of alumina, 5 to 20% by weight of limestone, 3 to 10% 10 to 20% by weight of colemannite.
In one embodiment of the present invention, the badge composition may further include at least one selected from the group consisting of borax and gum.
In one embodiment of the present invention, the long fiber glass comprises 50 to 65% by weight of SiO 2 , 12 to 16% by weight of Al 2 O 3 , 0.1 to 10% by weight of B 2 O 3 , CaO 20 to 25% by weight, and MgO to 0.1 to 5% by weight.
In one embodiment of the present invention, the long fiber glass may contain less than 2.0% by weight of R 2 O (Na 2 O, K 2 O, etc.).
The badge composition for preparing long fiber glass of the present invention exhibits improved meltability using a conventionally-used bentonite to shorten the melting time, and can provide a glass composition suitable for the production of long fiber glass using the same.
FIG. 1 shows the results of melting of the badge compositions of Example 3 and Comparative Example 1 at a temperature of 1,350 ° C. by time.
Hereinafter, the present invention will be described in more detail.
A badge composition for making long-fiberglass according to one embodiment of the present invention includes bentonite, silica sand, alumina, limestone, quicklime and collemanite.
In one embodiment of the present invention, the platelet stone may replace pyrophyllite which has been used as a raw material for conventional long-fiber glass production.
The season stone can be used after a series of refining processes such as crushing, grinding, magnetic force sorting, leaching, washing, drying and pulverizing.
For example, the limestone gemstones can be pulverized after crushing by a crushing operation using a hammer crusher or the like to have an appropriate particle size, for example, a particle size of 0.1 to 0.6 mm. The pulverized precipitate is further subjected to a magnetic separation process using a dry charger to remove the iron content, which is regarded as an impurity. If the iron powder is present in excess, it may cause a break in the fiberization process of the long fiber glass. To further reduce this iron content, the selected platelets can undergo leaching and the leaching process can be carried out at 80 < 0 > C for 2 hours using 5% oxalic acid, 5% hydrochloric acid or 5% have.
Through this purification process, the iron content in the precipitate can be reduced to 0.3% by weight or less. If the iron content in the precipitate exceeds 0.3% by weight, the heat transfer efficiency is lowered, so that the melting property of the glass is deteriorated and an additional fuel cost is required.
The platelet may be included in an amount of 8 to 42% by weight based on the total weight of the badge composition. If the content of the precipitate is less than 8% by weight, the amount of other additional raw materials in the composition increases, which is disadvantageous in terms of cost. In addition, when the content exceeds 42% by weight, The content of the R < 2 > O component, which is regarded as an impurity in the long-fiber glass, increases, thereby deteriorating the electrical insulation characteristics.
In one embodiment of the present invention, the silica sand and the alumina are used for controlling the change of the glass composition with use of the plaster stone.
Specifically, pyrophosphate contains 70 to 80% of SiO 2 and 15 to 25% of Al 2 O 3 0 to 1% of CaO, 0 to 1% of MgO, 0 to 1% of Fe 2 O 3 , 0 to 2% of R 2 O and 0 to 1% of impurities, 55% of SiO 2 and 25 to 35% of Al 2 O 3 and 10 to 20% of CaO, from 0 to 1% MgO, 1 to 2% Fe 2 O 3, from 2 to 6% R 2 O together and 0 to 1% of impurities are contained. Thus, the use of chairman-seat rather than pyrophyllite the manufacture of long-fiber glass, in order to adjust the weight ratio of SiO 2 and Al 2 O 3 required in the glass composition and requires a source of additional SiO 2, a large amount of addition than the president seat pyrophyllite It is necessary to contain the R 2 O component so as to lower the content of R 2 O. To this end, shield composition of the invention is the president seats with silica and a-alumina, the silica and alumina are complementary and R 2 O content of the appropriate level of the glass to become SiO 2 and Al 2 O 3 lacking the president seat using , Such as less than 2%, especially less than 1.8%.
The silica and alumina in the glass to be produced SiO 2 and Al 2 O 3, R 2 O to adjust the content to an appropriate level and of 20 to 50% by weight and 0.1 to 10% by weight relative to the total weight of the badge composition . When When the content of the silica is less than 20% by weight weakens the strength of the glass runs out within the SiO 2 composition, more than 50% by weight has a content of SiO 2 glass composition is too high the melting property and the hard fibrosis problem . If the content of alumina is less than 0.1% by weight, the content of Al 2 O 3 in the glass composition can not be compensated. If the content of Al 2 O 3 is more than 10% by weight, the content of Al 2 O 3 is high, have.
In one embodiment of the present invention, the limestone and quicklime are used to provide the CaO component of the glass to be produced, the content of which is 5 to 20% by weight and 3 to 10% by weight, respectively, based on the total weight of the badge composition, Lt; RTI ID = 0.0 > CaO < / RTI > When the content of the limestone and the quicklime is less than the above range, the content of CaO in the glass becomes insufficient and the melting property is deteriorated. When the content of the limestone and the quicklime is more than the above range, the glass transition temperature is increased, have.
In one embodiment of the present invention, the collemnite is used to provide the B 2 O 3 component of the glass to be produced, and when the content is in the range of 10 to 20% by weight based on the total weight of the badge composition An appropriate amount of B 2 O 3 component can be provided to the glass. When the content of the colemnasite is less than the above range, the content of B 2 O 3 in the glass becomes insufficient and the melting property is lowered. When the content exceeds the above range, there is a problem that the strength of the glass is lowered.
In one embodiment of the present invention, the badge composition may further comprise at least one member selected from the group consisting of borax and gum, the content of which is 0 to 4% by weight and 0 By weight to 1% by weight.
The above-described badge composition for producing long-fiber glass of the present invention is useful in terms of resource utilization by using instead of pyrophyllite, which is a raw material of conventional glass fibers, as well as improves the melting property and shortens the melting time, E-glass composition of fiberglass can be achieved. Thus, the badge composition according to the present invention can reduce the melting energy by shortening the melting time and contribute to the improvement of the quality of the long fiber glass with the melt homogeneity.
That is, it is possible to prepare a long-fiber glass such as a borosilicate-based long-fiber glass by homogenizing the molten glass after melting the above-mentioned badge composition, and the thus prepared long-fiber glass has a total weight From 50 to 65% by weight of SiO 2 , from 12 to 16% by weight of Al 2 O 3 , from 0.1 to 10% by weight of B 2 O 3 , from 20 to 25% by weight of CaO and from 0.1 to 5% by weight of MgO.
Among the components of the long fiber glass that can be produced using the badge composition according to the present invention, the SiO 2 is a network structural product oxide which forms a glass and can increase the chemical resistance of the glass. However, when the SiO 2 content is too high, the glass devitrification property may deteriorate. When the SiO 2 content is too low, the chemical resistance is decreased and the density is increased. Therefore, it is preferable that the content of SiO 2 be in the range of 50 to 65 wt%.
In addition, the Al 2 O 3 increases the high-temperature viscosity, chemical stability, thermal shock resistance and the like of the glass, and can contribute to increase the strain point and the Young's modulus. However, when the content of Al 2 O 3 is too high, the devitrification property and the chemical resistance may be lowered and the viscosity may be increased. When the content of Al 2 O 3 is too low, the elastic modulus may be lowered. Therefore, the content of Al 2 O 3 is preferably in the range of 12 to 16 wt%.
The above B 2 O 3 is a glass network structure product oxide which can improve the dissolution reactivity of the glass, improve the sealability, improve the chemical resistance, and contribute to lowering the density. However, when B 2 O 3 is contained too much, the acid resistance of the glass may deteriorate, the density may be increased, the strain point may be lowered and the heat resistance may be deteriorated. When B 2 O 3 is contained too low, And the resistance to such a phenomenon may be lowered. Therefore, the content of B 2 O 3 is preferably in the range of 0.1 to 10% by weight.
The CaO may contribute to lowering the density and improving the melting property. However, if the CaO content is too high, the density may be increased and the chemical resistance may be deteriorated. When the CaO content is too low, it is difficult to achieve the property improving effect due to the addition of CaO. Therefore, the content of CaO is preferably 20 to 25% by weight.
The MgO may contribute to lowering the density and improving the melting property similar to CaO, and the amount thereof may be 0.1 to 5% by weight.
On the other hand, the long fiber glass may contain R 2 O in an amount of less than 2.0% by weight.
The above-mentioned R 2 O is a component regarded as an impurity of glass, and if its content is 2.0% by weight or more, the electrical insulating property of the glass can be impaired. Accordingly, in the present invention, the content of R 2 O is controlled to a very small amount by suitably adjusting the composition of the badge composition for glass production as described above.
Hereinafter, the present invention will be described more specifically with reference to Examples, Comparative Examples and Experimental Examples. It should be apparent to those skilled in the art that these examples, comparative examples and experimental examples are only for illustrating the present invention, and the scope of the present invention is not limited thereto.
Manufacturing example 1 to 4: Tablet refining
Manufacturing example One:
After the first and second crushing of the annular stone ore, the crushed stone was crushed using a hammer crusher to obtain a grain size of 0.1 to 0.6 mm, and magnetic separation was carried out four times with a 10,000 gauss dry charger. The results are shown in Table 1 below. The results are shown in Table 1 below. ≪ tb > < TABLE >
Manufacturing example 2:
A leaching step was carried out for the calcite selected by the magnetic force in Production Example 1, and the calcite was treated with 5% oxalic acid at 80 ° C for 2 hours in the leaching process. After washing and drying the processed earth stone, a fine grinding process was carried out to obtain a purified earth stone having a particle size of 45 μm or less.
Manufacturing example 3:
The same procedure as in Production Example 2 was carried out except that 5% hydrochloric acid was used in the leaching process for the calcite selected by magnetic force in Production Example 1 to prepare a purified presenter stone having a particle size of 45 μm or less ≪ / RTI >
Manufacturing example 4:
The same procedure as in Production Example 2 was carried out except that 5% caustic soda (NaOH) was used in the leaching process for the calcined stone selected by the magnetic force in Production Example 1, Was obtained.
Table 2 shows the analytical results of the components of the purified reticulum stones obtained from the above production examples.
As can be seen from the above Table 2, the amounts of iron contained in the precipitates of Production Examples 2 to 4 obtained through refining processes including leaching were regarded as impurities.
Example 1 to 5 and Comparative Example One: badge Composition and Long fiber Manufacture of glass
The raw materials were mixed (unit: wt%) so that the total weight of the badge was 130 g in the composition shown in the following Table 3, and then 1,350 (weight%) was obtained by using an alumina crucible having a capacity of 300 cc RTI ID = 0.0 > 120 C < / RTI > At this time, the precipitate obtained in Preparation Example 1 was used as the precipitate.
Then, the resulting molten glass was homogenized and then slowly cooled at room temperature for 120 minutes to prepare a cullet of long-fiber glass. The glass thus produced was subjected to X-ray fluorescence analysis and wet analysis, and the results are shown in Table 4 below.
As can be seen from Tables 3 and 4 above, the long fiber glass of Examples 1 to 5 prepared from the badge composition containing the platelet stone showed the same amount of impurity R 2 O as in Comparative Example 1 using pyrophyllite Respectively.
Experimental Example One:
After the lapse of 30 minutes, 60 minutes, 90 minutes, and 120 minutes at 1,350 DEG C to observe the melt characteristics of the badge composition prepared in the above Examples and Comparative Examples, the melt condition of the badge composition was observed, The time for melting was measured, and the results are shown in FIG. 1 and Table 5.
As can be seen in Table 5 and FIG. 1, the badge compositions of Examples 1 to 5 according to the present invention were completely dissolved after 90 minutes from the start of melting, while the badge composition of Comparative Example 1 using pyrophyllite Completely dissolved.
Thus, the badge composition according to the present invention, including the gallstone, exhibits improved meltability compared to conventional badge-bearing badges during the manufacture of long fiber glass, thereby reducing melting time and providing a composition suitable for glass fibers have. In addition, in the industrial use, the melting energy can be reduced by shortening the melting time, and the melting homogeneity can contribute to the improvement of the quality of the long fiber glass.
It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention. Do. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Accordingly, the actual scope of the invention is defined by the appended claims and their equivalents.
Claims (5)
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| KR1020150156669A KR101748496B1 (en) | 2015-11-09 | 2015-11-09 | Batch Composition for Preparing Long Glass Fiber Using Anorthite |
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| KR101748496B1 true KR101748496B1 (en) | 2017-06-19 |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1999001393A1 (en) | 1997-07-04 | 1999-01-14 | Nitto Boseki Co., Ltd. | Glass composition for fibers |
| KR100917269B1 (en) | 2009-01-07 | 2009-09-16 | 군산대학교산학협력단 | Preparation of borosilicate fiber glass batches for long fiber containing cullet of tft-lcd substrate glass |
| WO2011155362A1 (en) | 2010-06-08 | 2011-12-15 | 日東紡績株式会社 | Glass fiber |
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- 2015-11-09 KR KR1020150156669A patent/KR101748496B1/en active IP Right Grant
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1999001393A1 (en) | 1997-07-04 | 1999-01-14 | Nitto Boseki Co., Ltd. | Glass composition for fibers |
| KR100917269B1 (en) | 2009-01-07 | 2009-09-16 | 군산대학교산학협력단 | Preparation of borosilicate fiber glass batches for long fiber containing cullet of tft-lcd substrate glass |
| WO2011155362A1 (en) | 2010-06-08 | 2011-12-15 | 日東紡績株式会社 | Glass fiber |
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