WO2016093212A1 - Composition de verre pour fibre de verre, fibre de verre, et procédé de production de fibre de verre - Google Patents

Composition de verre pour fibre de verre, fibre de verre, et procédé de production de fibre de verre Download PDF

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Publication number
WO2016093212A1
WO2016093212A1 PCT/JP2015/084359 JP2015084359W WO2016093212A1 WO 2016093212 A1 WO2016093212 A1 WO 2016093212A1 JP 2015084359 W JP2015084359 W JP 2015084359W WO 2016093212 A1 WO2016093212 A1 WO 2016093212A1
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WIPO (PCT)
Prior art keywords
glass
glass fiber
composition
temperature
glass composition
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PCT/JP2015/084359
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English (en)
Japanese (ja)
Inventor
拡志 澤里
長壽　研
晋作 西田
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日本電気硝子株式会社
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Priority to JP2016563676A priority Critical patent/JPWO2016093212A1/ja
Publication of WO2016093212A1 publication Critical patent/WO2016093212A1/fr

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B14/00—Use of inorganic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of inorganic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
    • C04B14/38—Fibrous materials; Whiskers
    • C04B14/42—Glass

Definitions

  • the present invention relates to a glass composition for glass fibers having excellent corrosion resistance.
  • a glass composition for glass fiber that is suitable as a reinforcing material such as calcium silicate board and GRC (glass fiber reinforced concrete), and as a material that requires corrosion resistance such as a battery separator and an asbestos substitute, and has excellent productivity. It is.
  • This glass fiber is also used as a corrosion-resistant material for reinforcing materials for calcium silicate plates and battery separators.
  • GRC is a building that is molded into a plate shape by spraying a mixture of glass fiber cut to a predetermined length and cement, aggregate, admixture, water, etc. into the mold using a spray gun or the like. It is a structural material for use. Glass fibers used for GRC are required to have sufficient strength even in decades in concrete.
  • the glass fiber as described above is obtained by continuously molding and spinning molten glass using a noble metal bushing device to obtain a fiber shape.
  • the bushing structure has a container shape for retaining molten glass, and a number of nozzles are arranged in the vertical direction at the bottom.
  • Glass fiber is molded by drawing molten glass adjusted to a temperature in the vicinity of the spinning temperature (the temperature at which the viscosity of the glass is approximately 10 3 dPa ⁇ s, also called the molding temperature) from the nozzle at the bottom of the bushing. .
  • Patent Document 2 reduces the ZrO 2 content and contains a certain amount of TiO 2 and K 2 O, thereby achieving a spinning temperature of 1280 ° C. or lower and a difference between the liquid phase temperature and the spinning temperature of 80 ° C. or higher.
  • the glass composition made public. However, considering continuous production in a glass melting kiln, it is preferable that there is little change in devitrification (difference between liquidus temperature and spinning temperature) even if the glass composition changes somewhat. However, the glass composition disclosed in Patent Document 2 does not consider such a point.
  • the present invention has been made in view of the above circumstances, and since the difference between the spinning temperature and the liquidus temperature of the glass is large, the productivity is good and the devitrification property is not easily changed by a composition change.
  • the object is to provide a glass composition.
  • the glass composition for glass fibers of the present invention has a glass composition in terms of oxide mass%, SiO 2 50 to 65%, Al 2 O 3 0 to 5%, CaO 0.3 to 10%, Na 2 O 10-20%, K 2 O 0.6-5%, TiO 2 7.3-10%, ZrO 2 17-20%.
  • the glass composition for glass fiber is excellent in alkali resistance, has a glass spinning temperature and a liquidus temperature of 100 ° C. or higher, and devitrification hardly changes due to a composition change. Can do.
  • Li 2 O 0 to 0.2% by mass% in terms of oxide it is preferable to contain Li 2 O 0 to 0.2% by mass% in terms of oxide.
  • Na 2 O + K 2 O is preferably 10 to 20%.
  • Na 2 O + K 2 O means the total content of Na 2 O and K 2 O.
  • the viscosity of glass can be reduced and the glass composition for glass fibers excellent in the meltability and a moldability can be obtained.
  • the spinning temperature is preferably 1280 ° C. or lower.
  • the “spinning temperature” means a temperature at which the glass has a viscosity of 10 3 dPa ⁇ s.
  • fiberization can be performed at a low temperature, so that the service life of fiberization equipment such as bushings can be extended, and the production cost can be reduced.
  • the difference between the spinning temperature and the liquidus temperature is preferably 105 ° C. or higher.
  • the weight reduction rate of the glass is 3% or less. Preferably there is.
  • the glass has a weight reduction rate of 3% or less when immersed in 100 ml of a 10% by weight HCl aqueous solution at 80 ° C. for 16 hours in a glass having a specific gravity of 2 weight classified to a particle size of 300 to 500 ⁇ m. Preferably there is.
  • the glass fiber of the present invention is characterized by comprising the above glass fiber glass composition.
  • the method for producing glass fibers of the present invention has a glass composition of mass% in terms of oxide, 50 to 65% SiO 2 , 0 to 5% Al 2 O 3 , 0.3 to 10% CaO, and Na 2 O 10
  • a raw material batch prepared so as to be a glass containing -20%, K 2 O 0.6-5%, TiO 2 7.3-10%, ZrO 2 17-20% is melted in a glass melting furnace and melted. Glass is continuously drawn from the bushing and formed into a fiber shape.
  • SiO 2 is a main component that forms a glass skeleton structure. Moreover, it is a component which improves the acid resistance of glass.
  • the content of SiO 2 is 50 to 65%, preferably 55 to 60%, more preferably 57 to 60%. When the content of SiO 2 is too small, the mechanical strength of the glass tends to decrease. Moreover, the acid resistance of glass falls. When the content of SiO 2 is too large, the energy increases required to melt the glass viscosity of the glass becomes high. Further, the noble metal bushing is severely damaged, the replacement frequency is increased, and the production cost is increased. Moreover, the alkali resistance of glass falls.
  • Al 2 O 3 is a component that increases the chemical durability and mechanical strength of glass.
  • Al 2 O 3 is also a component that increases the viscosity of the glass.
  • the content of Al 2 O 3 is 0 to 5%, preferably 0 to 3%, more preferably 0 to 1%. Al viscosity of the glass when the content is too large the 2 O 3 becomes energy increases required for melting the glass is high.
  • CaO is a component that lowers the viscosity of the glass.
  • the CaO content is 0.3 to 10%, preferably 0.3 to 5%, more preferably 0.3 to 4%, and still more preferably 0.3 to 3%. If the content of CaO is too small, it is difficult to obtain the above effect. If the content of CaO is too large, crystals composed of Zr, Si, Na, and Ca are likely to precipitate in the glass, the liquidus temperature of the glass is increased, and the difference between the spinning temperature and the liquidus temperature is reduced, resulting in productivity. Decreases.
  • Na 2 O and K 2 O which are alkali metal oxides, are components that lower the viscosity of the glass and increase the meltability and moldability.
  • the alkali metal oxide is a component that reduces the water resistance of the glass if contained in a large amount.
  • the total content of Na 2 O and K 2 O (Na 2 O + K 2 O) is 10 to 20%, preferably 10 to 18%, more preferably 12 to 18%, still more preferably 16.1 to 17%. It is.
  • Na 2 O + K 2 the amount of O is too small, the energy increases required to melt the glass viscosity of the glass becomes high. Further, the noble metal bushing is severely damaged, the replacement frequency is increased, and the production cost is increased.
  • Na 2 O + K 2 the amount of O is too large, the water resistance of the glass decreases.
  • Na 2 O is a component that increases the meltability and moldability of glass by reducing the viscosity of the glass.
  • the content of Na 2 O is 10 to 20%, preferably 10 to 18%, more preferably 12 to 18%, and most preferably 12 to 15.6%.
  • the Na 2 O content is too small, the energy increases required to melt the glass viscosity of the glass becomes high. Further, the noble metal bushing is severely damaged, the replacement frequency is increased, and the production cost is increased.
  • the content of Na 2 O is too large high liquidus temperature of the glass, the difference between the spinning temperature and the liquidus temperature becomes productivity is reduced smaller. Moreover, the water resistance of the glass decreases.
  • K 2 O is a component that improves the meltability and moldability of the glass by reducing the viscosity of the glass. In addition, it has a function of lowering the liquidus temperature, and has a great effect of reducing fluctuations in devitrification due to composition changes.
  • the content of K 2 O is 0.6 to 5%, preferably 0.6 to 3%, more preferably 0.6 to 2%, still more preferably 0.8 to 2%, and most preferably 1.0 to 2.0%. If the content of K 2 O is too small, devitrification changes rapidly due to a composition change, which is not preferable. When the content of K 2 O is too large water resistance of glass decreases.
  • the batch raw material easily absorbs moisture, and an aggregate (so-called “dama”) of the raw material powder is easily formed. If aggregates of the raw material powder are formed, the solubility of the batch raw material deteriorates, and undissolved zirconia tends to remain in the product glass, which is not preferable.
  • the glass composition for glass fiber of the present invention may contain Li 2 O.
  • Li 2 O is a component that significantly lowers the liquidus temperature by adding a small amount, increases the difference between the spinning temperature and the liquidus temperature, and improves the productivity.
  • the content of Li 2 O is preferably 0 to 0.2%.
  • Li 2 O has a high raw material cost, if the content of Li 2 O is too large, the manufacturing cost increases.
  • Li 2 O lithium material can not be secured required for production and the content is too much, there is a concern that is necessary measures such as reducing the production.
  • Li 2 O it is preferred not to contain Li 2 O.
  • “not containing Li 2 O” means that Li 2 O is not actively contained as a glass composition, and does not exclude inevitable impurities. More specifically, it means that the content including impurities is 0.01% by mass or less. Employing the above configuration makes it easy to avoid problems such as anxiety of raw material supply and soaring raw material costs.
  • TiO 2 is a component that improves the water resistance and alkali resistance of glass, lowers the spinning temperature, and greatly reduces the liquidus temperature.
  • the content of TiO 2 is 7.3 to 10%, preferably 7.3 to 8.5%, more preferably 7.3 to 8.0%.
  • the content of TiO 2 is too small, water resistance and alkali resistance of the glass decreases.
  • the spinning temperature rises and the production cost increases.
  • the content of TiO 2 is too large, the liquidus temperature becomes easier crystals precipitated comprising TiO 2 rises dramatically in the glass. As a result, the difference between the spinning temperature and the liquidus temperature is reduced and the productivity is lowered.
  • ZrO 2 is a component that improves the alkali resistance, acid resistance, and water resistance of the glass.
  • the content of ZrO 2 is 17 to 20%, preferably 17.2 to 20%, more preferably 17.2 to 19.5%, still more preferably 17.2 to 18.5%, most preferably 17.5. ⁇ 18.0%.
  • the content of ZrO 2 is too small, the alkali resistance is decreased, can not be realized and the durability required for GRC.
  • the content of ZrO 2 is too large, the liquidus temperature of the glass becomes high, the difference between the spinning temperature and the liquidus temperature becomes small, and the productivity is lowered.
  • the glass composition for glass fiber of the present invention does not contain Li 2 O in terms of composition design.
  • the glass composition for glass fiber of the present invention may comprise the above-mentioned component (SiO 2, Al 2 O 3 , CaO, Na 2 O, K 2 O, TiO 2 and ZrO 2) other than the component.
  • SiO 2, Al 2 O 3 , CaO, Na 2 O, K 2 O, TiO 2 and ZrO 2 other than the component.
  • the reason for this is that when the total amount of these components is less than 98%, the alkali resistance, acid resistance, and water resistance are lowered due to unintentional mixing of different components, and the product characteristics are lowered, and the spinning temperature and liquid phase are decreased. Inconveniences such as a decrease in temperature and a decrease in productivity are likely to occur.
  • trace components such as H 2 , CO 2 , CO, H 2 O, He, Ne, Ar, and N 2 may be contained up to 0.1%.
  • noble metal elements such as Pt, Rh, Au, to 500 ppm in glass.
  • B 2 O 3 , MgO, SrO, BaO, ZnO, Fe 2 O 3 , P 2 O 5 , Cr 2 O 3 , Sb 2 O 3 , SO 3 , MnO, SnO 2 , CeO 2 , Cl 2 , La 2 O 3 , WO 3 , Nb 2 O 5 , Y 2 O 3 and the like may be contained up to 2% in total.
  • the glass composition for glass fiber of the present invention is a glass weight reduction when a specific gravity ⁇ 2 weight glass classified to a particle size of 300 to 500 ⁇ m is immersed in 100 ml of 10% by weight NaOH aqueous solution at 80 ° C. for 16 hours.
  • the rate is preferably 3% or less, particularly 1% or less, and more preferably 0.8% or less.
  • the weight reduction rate of the glass by this alkali resistance test is higher than 3%, the alkali resistance of the glass is lowered, and the reliability as a reinforcing material of a composite material such as a calcium silicate plate or GRC is lowered.
  • the glass composition for glass fiber according to the present invention is a glass weight reduction when a glass having a specific gravity of 2 wt% classified to a particle size of 300 to 500 ⁇ m is immersed in 100 ml of a 10 mass% HCl aqueous solution at 80 ° C. for 16 hours.
  • the rate is preferably 3% or less, particularly 1% or less, and more preferably 0.5% or less.
  • the glass composition for glass fiber of the present invention preferably has an alkali elution amount of 0.40 mg or less, particularly 0.35 mg or less, more preferably 0.30 mg or less.
  • an alkali elution amount 0.40 mg or less, particularly 0.35 mg or less, more preferably 0.30 mg or less.
  • the glass composition for glass fibers of the present invention preferably has a spinning temperature of 1280 ° C or lower, particularly 1260 ° C or lower.
  • a spinning temperature of 1280 ° C or lower, particularly 1260 ° C or lower.
  • the glass composition for glass fiber of the present invention preferably has a difference between the spinning temperature and the liquidus temperature of 100 ° C. or higher, particularly 105 ° C. or higher. If the difference between the spinning temperature and the liquidus temperature is small, the productivity decreases.
  • the glass composition for glass fiber of the present invention is preferably 23 ° C. or lower when the devitrification change amount with respect to composition variation obtained by the following evaluation is evaluated.
  • the difference ( ⁇ T) between the spinning temperature and the liquidus temperature is determined.
  • the difference between the spinning temperature and the liquidus temperature is obtained.
  • ) of the difference in the difference between the spinning temperature and the liquid phase temperature before and after substitution when 0.3% by mass of K 2 O is substituted with TiO 2 0.3 of CaO
  • ) of the amount of change in the difference between the spinning temperature and the liquidus temperature before and after the substitution when the mass% is substituted with TiO 2 is determined.
  • the value having the largest amount of change is adopted, and this value is referred to as “the amount of change in devitrification with respect to composition variation”. Call it. If this value is too large, it becomes difficult to perform stable spinning in actual production.
  • MM method marble melt method
  • MM method marble melt method
  • the glass raw material is prepared so that the glass contains 7.3 to 10% of TiO 2 and 17 to 20% of ZrO 2 .
  • Glass cullet may be used for a part or all of the glass raw material. The reason why the content of each component is as described above is as described above, and the description is omitted here.
  • the melting temperature is preferably about 1400 to 1600 ° C.
  • molten glass is spun and formed into glass fibers. More specifically, molten glass is supplied to the bushing. The molten glass supplied to the bushing is continuously drawn out in filament form from a number of bushing nozzles provided on the bottom surface. Various processing agents are applied to the monofilaments drawn in this way, and glass fibers are obtained by focusing each monofilament.
  • the glass fiber of the present invention thus formed is processed into chopped strands, yarns, rovings, etc. and used for various purposes.
  • the chopped strand is obtained by cutting glass fibers (strands) obtained by focusing glass monofilaments into a predetermined length.
  • a yarn is a twisted strand.
  • Roving is a combination of a plurality of strands wound in a cylindrical shape.
  • Table 1 shows examples of the present invention (Sample Nos. 1 to 7), and Table 2 shows comparative examples (Sample Nos. 8 to 10).
  • various glass raw materials such as a natural raw material and a chemical raw material, were weighed and mixed so that it might become the glass composition in a table
  • this glass batch was heated in an indirect heating electric furnace at 1550 ° C. for 5 hours to obtain a molten glass.
  • the molten glass was stirred a plurality of times using a heat-resistant stirring rod during heating.
  • the molten glass obtained was poured into a refractory mold to form a plate-like glass, and then annealed in a slow cooling furnace (heated at a temperature 30 to 50 ° C. higher than the temperature at 10 13 dPa ⁇ s for 30 minutes) Then, the temperature range from the annealing point to the strain point was decreased at 1 ° C./min). About each obtained sample, alkali resistance, acid resistance, the amount of alkali elution, spinning temperature, and liquidus temperature were measured.
  • the alkali resistance was measured as follows. First, the above plate glass sample is pulverized, glass having a particle diameter of 300 to 500 ⁇ m is precisely weighed by a specific gravity ⁇ 2 weight, and then immersed in 100 ml of 10 mass% NaOH solution at 80 ° C. for 16 hours. Shake on the conditions. Thereafter, the weight reduction rate of the glass sample was measured. The smaller this value, the better the alkali resistance.
  • Acid resistance was measured as follows. First, the above plate glass sample is pulverized, and glass having a particle size of 300 to 500 ⁇ m is precisely weighed by a specific gravity ⁇ 2 weight, and then immersed in 100 ml of 10 mass% HCl solution at 80 ° C. for 16 hours. Shake on the conditions. Thereafter, the weight reduction rate of the glass sample was measured. The smaller this value, the better the acid resistance.
  • the alkali elution amount was measured by a method based on JIS R3502 (1995). The smaller this value, the better the water resistance.
  • the spinning temperature was measured as follows. First, a plate-like glass sample was crushed to an appropriate size and put into an alumina crucible so as to prevent air bubbles from being involved. Subsequently, the alumina crucible was heated to bring the sample into a molten state, and the viscosity of the glass at a plurality of temperatures was determined by a platinum ball pulling method. Thereafter, a viscosity curve was created from the obtained plurality of measured values, and the temperature at which 10 3 dPa ⁇ s was obtained was calculated by interpolation.
  • the liquid phase temperature was measured as follows. First, a plate-like glass sample was pulverized, and filled in a fire-resistant container having an appropriate bulk density in a state adjusted to have a particle size in the range of 300 to 500 ⁇ m. Subsequently, the refractory container was placed in an indirect heating type temperature gradient furnace having a maximum temperature set to 1250 ° C. and left to stand for 16 hours in an air atmosphere. Then, the test body was taken out from the temperature gradient furnace together with the refractory container, cooled to room temperature, and then the liquid phase temperature was specified by a polarizing microscope.
  • the difference between the spinning temperature and the liquidus temperature was calculated from both values.
  • the amount of change in devitrification with respect to composition variation was evaluated as follows. First SiO 2, Al 2 O 3, Na 2 O, the content of ZrO 2 is fixed to a constant value, and the measurement sample a of 0.3 mass% was replaced by K 2 O of CaO, the K 2 O 0. 3% by weight and the measurement sample b was replaced by TiO 2, were respectively prepared measurement sample c was substituted for 0.3 weight% of CaO in TiO 2. Next, for each measurement sample, the absolute value (° C.) of the amount of change in the difference between the spinning temperature and the liquid phase temperature before and after substitution was determined. Of the absolute values thus determined, the largest value was defined as the amount of change in devitrification with respect to composition variation.
  • the GRC durability was evaluated as follows. First, using a spray gun, a mixture of glass fiber and mortar was sprayed into a wooden frame and formed into a plate shape. The sample on the 14th day of the material age was immersed in warm water at 70 ° C., and the sample on the 10th day after the immersion was subjected to a three-point bending test to measure the bending strength (Modulus of rupture). The evaluation of the bending strength was conducted using sample No. The case where it became 10 or more was marked with ⁇ , and the others were marked with ⁇ .
  • the glass fiber produced by using the glass composition for glass fiber of the present invention is suitable as a corrosion resistant material such as a reinforcing material for a calcium silicate plate and a battery separator.

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Abstract

L'invention concerne une composition de verre alcalino-résistante destinée à une fibre de verre, ladite composition présentant une bonne productivité, étant donné que la différence entre la température de filage et la température de la phase liquide du verre est élevée, et présentant des propriétés de dévitrification qui ne varient pas facilement à cause d'une variation de composition. La présente invention est caractérisée en ce qu'elle contient, en tant que composition de verre, en % en masse en termes d'oxydes, de 50 à 65 % de SiO2, de 0 à 5 % d'Al2O3, de 0,3 à 10 % de CaO, de 10 à 20 % de Na2O, de 0,6 à 5 % de K2O, de 7,3 à 10 % de TiO2, et de 17 à 20 % de ZrO2.
PCT/JP2015/084359 2014-12-11 2015-12-08 Composition de verre pour fibre de verre, fibre de verre, et procédé de production de fibre de verre WO2016093212A1 (fr)

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JP2014-250543 2014-12-11

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2018089822A (ja) * 2016-12-01 2018-06-14 日本電気硝子株式会社 メッシュ積層体及びコンクリート剥落防止材
JP2019034486A (ja) * 2017-08-17 2019-03-07 日本電気硝子株式会社 硬化体の成形方法
WO2019111713A1 (fr) * 2017-12-05 2019-06-13 日本電気硝子株式会社 Fibre de verre et son procédé de production
CN109982982A (zh) * 2016-12-27 2019-07-05 日本电气硝子株式会社 玻璃纤维用玻璃组合物、玻璃纤维和玻璃纤维的制造方法

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4963712A (fr) * 1972-07-27 1974-06-20
JPS5046712A (fr) * 1973-02-14 1975-04-25
JPS55140735A (en) * 1979-03-15 1980-11-04 Pilkington Brothers Ltd Alkali resistant glass fiber
JPH09156957A (ja) * 1995-12-08 1997-06-17 Nippon Electric Glass Co Ltd 耐蝕性ガラス繊維

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4963712A (fr) * 1972-07-27 1974-06-20
JPS5046712A (fr) * 1973-02-14 1975-04-25
JPS55140735A (en) * 1979-03-15 1980-11-04 Pilkington Brothers Ltd Alkali resistant glass fiber
JPH09156957A (ja) * 1995-12-08 1997-06-17 Nippon Electric Glass Co Ltd 耐蝕性ガラス繊維

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2018089822A (ja) * 2016-12-01 2018-06-14 日本電気硝子株式会社 メッシュ積層体及びコンクリート剥落防止材
CN109982982A (zh) * 2016-12-27 2019-07-05 日本电气硝子株式会社 玻璃纤维用玻璃组合物、玻璃纤维和玻璃纤维的制造方法
JP2019034486A (ja) * 2017-08-17 2019-03-07 日本電気硝子株式会社 硬化体の成形方法
WO2019111713A1 (fr) * 2017-12-05 2019-06-13 日本電気硝子株式会社 Fibre de verre et son procédé de production
CN111433166A (zh) * 2017-12-05 2020-07-17 日本电气硝子株式会社 玻璃纤维及其制造方法
JPWO2019111713A1 (ja) * 2017-12-05 2020-10-08 日本電気硝子株式会社 ガラス繊維及びその製造方法
CN111433166B (zh) * 2017-12-05 2022-10-14 日本电气硝子株式会社 玻璃纤维及其制造方法
US11577990B2 (en) 2017-12-05 2023-02-14 Nippon Electric Glass Co., Ltd. Glass fiber and method for producing same
JP7288246B2 (ja) 2017-12-05 2023-06-07 日本電気硝子株式会社 ガラス繊維及びその製造方法

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