WO2012132327A1 - 無機繊維質ペーパー及びその製造方法並びに設備 - Google Patents
無機繊維質ペーパー及びその製造方法並びに設備 Download PDFInfo
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Definitions
- the present invention relates to an inorganic fibrous paper, a method for producing the same, and equipment, and more particularly to an improvement in the restoration rate after compression heating of inorganic fibrous paper containing biosoluble inorganic fibers.
- Inorganic fiber paper is lightweight, easy to handle, and excellent in heat resistance, and is used as, for example, a heat-resistant sealing material.
- problems have recently been pointed out that inorganic fibers are inhaled into the human body and enter the lungs.
- biosoluble inorganic fibers have been developed that do not cause problems even when inhaled by the human body, or are unlikely to occur (for example, Patent Document 1).
- inorganic fiber paper containing conventional biosoluble inorganic fibers as inorganic fibers has a problem that the restoration rate after compression heating is small.
- the present invention has been made in view of the above problems, and an object of the present invention is to provide an inorganic fiber paper excellent in a restoration rate after compression heating, a manufacturing method thereof, and equipment.
- An inorganic fibrous paper according to an embodiment of the present invention for solving the above-described problems is characterized by including a biosoluble inorganic fiber subjected to heat treatment and a binder. ADVANTAGE OF THE INVENTION According to this invention, the inorganic fibrous paper excellent in the restoration rate after compression heating can be provided.
- the inorganic fibrous paper may have a restoration rate after compression heating of 60% or more.
- a method for producing an inorganic fibrous paper includes a first step of heat-treating amorphous biosoluble inorganic fibers and the heat treatment. And a second step of making an inorganic fibrous paper containing the biosoluble inorganic fiber and a binder.
- ADVANTAGE OF THE INVENTION According to this invention, the manufacturing method of the inorganic fibrous paper excellent in the restoration rate after compression heating can be provided.
- the biosoluble inorganic fiber may be heated at a temperature lower than its crystallization temperature.
- an equipment according to an embodiment of the present invention for solving the above-described problem is an equipment for heating and / or keeping warm, and is characterized in that any one of the inorganic fibrous papers is incorporated.
- ADVANTAGE OF THE INVENTION According to this invention, the installation provided with the inorganic fibrous paper excellent in the restoration rate after compression heating can be provided.
- an inorganic fibrous paper excellent in a restoration rate after compression heating, a manufacturing method thereof, and equipment.
- the present method includes a first step of heat-treating amorphous biosoluble inorganic fibers (hereinafter referred to as “heat treatment step”), the biosoluble inorganic fibers subjected to the heat treatment, and a binder. And a second step of making an inorganic fibrous paper containing (hereinafter referred to as “paper making step”).
- an amorphous biosoluble inorganic fiber is prepared.
- the biosoluble inorganic fiber is not particularly limited as long as it is an inorganic fiber and has biosolubility (for example, a property of being decomposed in the living body even when inhaled into the lungs of the living body).
- the biologically soluble inorganic fiber is at least partially amorphous, and it is confirmed by powder X-ray diffraction (XRD) measurement that it is amorphous.
- the biologically soluble inorganic fiber is, for example, an inorganic fiber having a physiological saline dissolution rate at 40 ° C. of 1% or more.
- the physiological saline dissolution rate is measured, for example, as follows. That is, first, 1 g of a sample prepared by pulverizing inorganic fibers to 200 mesh or less and 150 mL of physiological saline are placed in an Erlenmeyer flask (volume: 300 mL) and placed in an incubator at 40 ° C. Next, a horizontal vibration of 120 revolutions per minute is continuously applied to the Erlenmeyer flask for 50 hours.
- the concentration (mg / L) of each element contained in the filtrate obtained by filtration is measured with an ICP emission analyzer. Then, based on the measured concentration of each element and the content (% by mass) of each element in the inorganic fiber before dissolution, the physiological saline dissolution rate (%) is calculated. That is, for example, when the measurement elements are silicon (Si), magnesium (Mg), calcium (Ca), and aluminum (Al), the physiological saline dissolution rate C (%) is calculated by the following formula.
- C (%) [filtrate amount (L) ⁇ (a1 + a2 + a3 + a4) ⁇ 100] / [mass of inorganic fiber before dissolution (mg) ⁇ (b1 + b2 + b3 + b4) / 100].
- a1, a2, a3 and a4 are the measured concentrations of silicon, magnesium, calcium and aluminum (mg / L), respectively, and b1, b2, b3 and b4 are respectively in the inorganic fibers before dissolution. It is content (mass%) of silicon, magnesium, calcium, and aluminum.
- the SiO 2 content of the biosoluble inorganic fiber may be, for example, 50 to 82% by mass.
- the SiO 2 content is preferably 63 to 81% by mass, more preferably 66 to 80% by mass, and even more preferably 71 to 76% by mass.
- the biosoluble inorganic fiber is, for example, an inorganic fiber having a SiO 2 content of 50 to 82% by mass and a total of CaO content and MgO content of 10 to 40% by mass.
- the total of the CaO content and the MgO content is preferably 18 to 40% by mass, and more preferably 20 to 34% by mass.
- the total range of these CaO content and MgO content can be arbitrarily combined with the above-described range of SiO 2 content.
- SiO 2 content of bio-soluble inorganic fibers is in the range described above, the bio-soluble inorganic fibers, in addition to bio-solubility, and thus also has excellent heat resistance.
- the CaO content of the biosoluble inorganic fiber may be, for example, 10 to 34% by mass. That is, the biosoluble inorganic fiber may be, for example, an inorganic fiber having a SiO 2 content of 50 to 82% by mass and a CaO content of 10 to 34% by mass (hereinafter referred to as “SiO 2 / CaO fiber”). )).
- the CaO content is preferably 12 to 35% by mass, and more preferably 21 to 26% by mass.
- the MgO content of the biosoluble inorganic fiber may be, for example, 1% by mass or less (that is, 0 to 1% by mass). That is, the biosoluble inorganic fiber has, for example, a SiO 2 / CaO fiber having a SiO 2 content of 60 to 82% by mass, a CaO content of 10 to 34% by mass, and a MgO content of 1% by mass or less. It is good also as being.
- the MgO content is preferably 0.9% by mass or less, and more preferably 0.8% by mass or less.
- the MgO content of the biosoluble inorganic fiber may be more than 1% by mass and 20% by mass or less. That is, the biosoluble inorganic fiber may be, for example, an inorganic fiber having a SiO 2 content of 50 to 82% by mass, an MgO content of more than 1% by mass, and 20% by mass or less.
- the MgO content is preferably 2 to 19% by mass, and more preferably 3 to 19% by mass.
- the biosoluble inorganic fiber has, for example, a SiO 2 content of 50 to 82% by mass (preferably 72 to 80% by mass) and a MgO content of 9 to 31% by mass (preferably 14 to 22% by mass).
- a biosoluble inorganic fiber (hereinafter sometimes referred to as “SiO 2 / MgO fiber”) having a CaO content of 1 to 9 mass% (preferably 1 to 8 mass%).
- the biosoluble inorganic fiber may have, for example, a total content of SiO 2 content, MgO content and CaO content of 97% by mass or more (that is, 97 to 100% by mass).
- the total of the SiO 2 content, the MgO content and the CaO content is preferably 97.5% by mass or more, and more preferably 98% by mass or more.
- the total range of these SiO 2 content, MgO content and CaO content is the range of the SiO 2 content described above, the total range of the CaO content and MgO content described above, the range of the CaO content described above. , And can be arbitrarily combined with the above-described MgO content range.
- the biosoluble inorganic fiber may further contain other components in addition to SiO 2 and an alkaline earth metal oxide (for example, at least one of MgO and CaO). That is, biosoluble inorganic fibers include, for example, alumina (Al 2 O 3 ), titania (TiO 2 ) and zirconia (ZrO 2 ), iron oxide (Fe 2 O 3 ), manganese oxide (MnO), potassium oxide (K One or more selected from the group consisting of 2 O) may be further contained, or may not be contained.
- the bio-soluble inorganic fibers containing Al 2 O 3 containing Al 2 O 3, Al 2 O 3 content, for example, 5 wt% or less, and 3.5 wt% or less, or 3 wt% or less. Moreover, it can be 1 weight% or more or 2 weight% or more. The content is preferably 0 to 3% by mass, more preferably 1 to 3% by mass. When Al 2 O 3 is contained in this range, it has excellent fire resistance and has an appropriate water-solubility and is easy to process.
- the biosoluble inorganic fiber has, for example, a total content of SiO 2 content, MgO content, CaO content and Al 2 O 3 content of 98% by mass or more (that is, 98 to 100% by mass) or 99% by mass. % Or more (that is, 99 to 100% by mass).
- biosoluble inorganic fibers having the following composition can be exemplified. 50 to 82% by weight of SiO 2 , Al 2 O 3 , ZrO 2 and TiO 2 Total of CaO and MgO 18-50% by weight
- biosoluble inorganic fiber of the following compositions can be illustrated.
- SiO 2 50 to 82% by weight
- Biologically soluble fibers can be broadly classified into Mg silicate fibers rich in MgO and Ca silicate fibers rich in CaO.
- the following composition can be illustrated as Mg silicate fiber. SiO 2 66-82% by weight CaO 1-9% by weight MgO 10-30% by weight Al 2 O 3 3 wt% or less Other oxides Less than 2 wt%
- the following composition can be illustrated as Ca silicate fiber. Fibers having the following composition are excellent in biosolubility and fire resistance after heating. SiO 2 66-82 wt% (for example, it can be 68-80 wt%, 70-80 wt%, 71-80 wt% or 71-76 wt%) CaO 10-34% by weight (for example, it can be 18-32% by weight, 20-30% by weight, 20-27% by weight or 21-26% by weight) MgO 3 wt% or less (eg, 1 wt% or less) Al 2 O 3 5 wt% or less (for example, 3.5 wt% or less, 3.4 wt% or less, or 3 wt% or less. Also, 1 wt% or more, 1.1 wt% or more, or 2 wt% or more it can) Other oxides ⁇ 2% by weight
- the total of SiO 2 , CaO, MgO and Al 2 O 3 may be more than 98 wt% or more than 99 wt%.
- the biosoluble inorganic fiber includes alkali metal oxides (K 2 O, Na 2 O, Li 2 O, etc.), Sc, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb as other components. , Dy, Ho, Er, Tm, Yb, Lu, Y, or a mixture thereof, Fe 2 O 3 , ZrO 2 , TiO 2 , P 2 O 5 , B 2 O 3 , MnO, One or more of ZnO, SrO, BaO, Cr 2 O 3 and the like may or may not be included. Other oxides may be 1.0 wt% or less, 0.2 wt% or less, or 0.1 wt% or less, respectively.
- the alkali metal oxide may contain 1.0% by weight or less, 0.2% by weight or less, or 0.1% by weight or less of each oxide.
- the total of the alkali metal oxides may be 1.0% by weight or less, 0.2% by weight or less, or 0.1% by weight or less.
- the average fiber diameter of the biosoluble inorganic fiber is not particularly limited as long as the inorganic fiber paper is suitably produced, and is, for example, 1 to 10 ⁇ m, preferably 2 to 6 ⁇ m.
- the average fiber diameter is less than 1 ⁇ m, the biosoluble inorganic fibers are easily broken, and the strength of the inorganic fibrous paper tends to be low.
- the average fiber diameter exceeds 10 ⁇ m, the density of the inorganic fibrous paper to be produced is too low, and therefore the strength of the inorganic fibrous paper tends to be low.
- the average fiber length of the biosoluble inorganic fibers is not particularly limited as long as the inorganic fiber paper is suitably produced, and is, for example, 1 to 200 mm, preferably 1 to 100 mm. When the average fiber length is within the above range, it becomes easy to produce an inorganic fibrous paper having an appropriate density.
- the amorphous biosoluble inorganic fiber (hereinafter referred to as “untreated fiber”) prepared as described above is subjected to heat treatment, and the heat treatment is performed.
- a biosoluble inorganic fiber (hereinafter referred to as “heat-treated fiber”) is obtained.
- the heat treatment conditions are such that the restoration rate after compression heating of the inorganic fibrous paper containing the heat-treated fibers is compared with that of the inorganic fiber paper containing untreated fibers instead of the heat-treated fibers. It is not particularly limited as long as it is determined within a range that becomes higher.
- the restoration rate after compression heating is the ratio at which the thickness of the inorganic fibrous paper is restored after the inorganic fibrous paper is heated in a compressed state (that is, the thickness of the inorganic fibrous paper is reduced) ( The ratio of the thickness after compression heating to the thickness before compression heating).
- the heat treatment is carried out by heating the inorganic fiber paper containing the heat-treated fibers to 500% at 500 ° C. in a compressed state so that the thickness is 50%. Is performed under conditions that are higher than those of the inorganic fiber paper containing the slag (for example, conditions under which the restoration rate is 60% or more).
- the heating temperature in the heat treatment (hereinafter referred to as “heat treatment temperature”) is, for example, 300 to 1300 ° C., preferably 300 to 1100 ° C., more preferably 400 to 1100 ° C., and further preferably 500 to 1100 ° C. is there.
- the temperature is 500 to 1100 ° C., preferably 500 to 900 ° C.
- the biosoluble inorganic fiber when the biosoluble inorganic fiber is heated at a temperature equal to or higher than its crystallization temperature to crystallize a part of the biosoluble inorganic fiber, the biosolubility after heating is lower than that before heating. There are things to do.
- the untreated fiber may be heated at a temperature lower than its crystallization temperature.
- the crystallization temperature of the untreated fiber is measured by, for example, TG-DTA (thermogravimetric-differential heat measurement).
- TG-DTA thermogravimetric-differential heat measurement
- the heat treatment temperature is lower than the crystallization temperature and can be 300 ° C., 400 ° C., or 500 ° C. or higher.
- the inorganic fiber paper containing heat-treated fibers that have been heat-treated at a relatively high heat-treatment temperature may have a recovery rate of more than 100% after compression heating.
- the heat treatment temperature is, for example, heated at 500 ° C. for 3 hours in a state where the inorganic fiber paper containing the heat treated fiber is compressed so as to have a thickness of 50% after compression heating.
- the range in which the subsequent restoration rate) is 100% or less may be used.
- a density of 100% or less is preferable because the density is relatively high.
- untreated fibers are heated at a temperature of 450 to 550 ° C.
- the restoration rate after the compression heating of the inorganic fibrous paper is effectively enhanced while effectively preventing the density of the inorganic fibrous paper after the compression heating.
- the crystallization temperature of the untreated fiber is higher than 550 ° C., embrittlement of the heat-treated fiber due to heat treatment and a decrease in biosolubility can be effectively avoided.
- the heating time in the heat treatment (hereinafter referred to as “heat treatment time”) is an inorganic fiber in which the restoration rate after compression heating of the inorganic fibrous paper containing the heat-treated fiber is replaced with the heat-treated fiber and contains an untreated fiber.
- the heat treatment time is, for example, 1 minute to 48 hours, preferably 3 minutes to 24 hours.
- a raw material containing heat-treated fibers and a binder is prepared.
- the binder is not particularly limited as long as it binds the heat-treated fiber, and one or both of an organic binder and an inorganic binder can be used.
- the organic binder is, for example, one or two selected from the group consisting of acrylic ester resins, acrylic resins such as styrene / acrylic resins, ethylene / vinyl acetate resins, vinyl acetate resins, styrene / butadiene resins, starch, and polyacrylamide. More than a seed.
- the inorganic binder is, for example, one or more selected from the group consisting of colloidal silica such as anionic colloidal silica and cationic colloidal silica, fumed silica, zirconia sol, titania sol, alumina sol, bentonite, and kaolin. is there.
- the content of the heat-treated fiber is, for example, 80 to 99.5% by mass
- the content of the binder one or both of the organic binder and the inorganic binder
- the heat-treated fiber content is preferably 85 to 99% by mass
- the binder content is preferably 1 to 15% by mass
- the heat-treated fiber content is 85 to 95% by mass. More preferably, the binder content is 15 to 5% by mass.
- the raw material may further contain other components in addition to the heat-treated fiber and the binder. That is, the raw material may further contain, for example, a refractory inorganic powder.
- the refractory inorganic powder is, for example, ceramic powder such as silica, alumina, titania, zirconia, silicon nitride, silicon carbide, and / or carbon powder such as carbon black. Content of another component is 5 mass% or less or 3 mass% or less with respect to the total amount except the solvent mentioned later, for example.
- the raw material is prepared by mixing heat-treated fibers, a binder, and other components as necessary with a solvent.
- the solvent is not particularly limited as long as the heat-treated fiber and the binder are mixed and dispersed.
- water for example, distilled water, ion exchange water, tap water, ground water, industrial water
- a polar organic solvent for example, Monovalent alcohols such as ethanol and propanol, and divalent alcohols such as ethylene glycol
- the raw material of the inorganic fiber paper thus prepared is a fluid composition (so-called slurry or the like) suitable for papermaking.
- inorganic fiber paper is made from the raw material thus prepared.
- Papermaking can be preferably performed using, for example, a commercially available papermaking apparatus.
- the inorganic fibrous paper according to the present embodiment (hereinafter referred to as “the present paper”) is preferably produced by such a method. That is, this paper is an inorganic fibrous paper containing the above-mentioned heat-treated fiber and a binder.
- the SiO 2 content of the heat-treated fibers contained in this paper is, for example, 50 to 82% by mass. In this case, the paper has excellent heat resistance due to the relatively large SiO 2 content of the heat-treated fiber.
- the CaO content of the heat-treated fiber contained in this paper is, for example, 10 to 34% by mass. That is, this heat-treated fiber is, for example, a SiO 2 / CaO fiber having a SiO 2 content of 50 to 82% by mass and a CaO content of 10 to 34% by mass.
- the MgO content of the heat-treated fiber contained in this paper is, for example, 1% by mass or less. That is, this heat-treated fiber is, for example, a SiO 2 / CaO fiber having a SiO 2 content of 50 to 82% by mass, a CaO content of 10 to 34% by mass, and a MgO content of 1% by mass or less. is there.
- examples of the composition of the heat-treated fiber are as described for this method.
- the binder contained in this paper is one or both of an organic binder and an inorganic binder as described above. That is, this paper may contain, for example, an organic binder and no inorganic binder, may contain an organic binder and an inorganic binder, or may contain an inorganic binder and no organic binder.
- the contents of the heat-treated fiber and binder in the paper are not particularly limited, and are appropriately determined depending on the use and required characteristics.
- the content of the heat-treated fiber is 80 to 99.5% by mass. More specifically, for example, in this paper, the content of the heat-treated fiber is 90 to 98% by mass, and the content of the binder is 2 to 10% by mass.
- the thickness of this paper is not particularly limited and is appropriately determined depending on its use and required characteristics. That is, the thickness of the paper is, for example, 0.1 to 8 mm, preferably 0.5 to 6 mm.
- the basis weight of the paper is not particularly limited, and is appropriately determined depending on its use and required characteristics. That is, the basis weight of the paper is, for example, 10 to 2800 g / m 2 , and preferably 75 to 1800 g / m 2 .
- the density of the paper is not particularly limited, and is appropriately determined depending on its use and required characteristics. That is, the density of this paper is, for example, 0.1 to 0.35 g / cm 3 , and preferably 0.15 to 0.3 g / cm 3 .
- This paper effectively improves the restoration rate after compression heating by containing heat-treated fibers as biosoluble inorganic fibers. That is, this paper has a restoration rate of 60% or more after compression heating, for example. More specifically, for example, the present paper has a restoration rate of 60% or more after being heated at 500 ° C. for 3 hours in a compressed state so as to have a thickness of 50%. More specifically, the restoration rate is, for example, 60 to 100%, preferably 60 to 80%, and more preferably 60 to 70%.
- This paper is applied for various purposes. That is, this paper is used for the installation for a heating and / or heat retention, for example. Specifically, this paper is used in, for example, heat treatment equipment, industrial furnaces, incinerators, combustion equipment, molten aluminum equipment, hot water boilers, hot water heaters, household gas stoves, heating appliances (gas fan heaters, petroleum fan heaters, etc.) Used as sealing materials (for example, gaskets) (sealing materials such as heat and gas), buffering agents (cushioning materials) (for example, catalyst buffer materials for denitration), and petroleum stove cores.
- sealing materials for example, gaskets
- sealing materials such as heat and gas
- buffering agents cushioning materials
- catalyst buffer materials for denitration for example, catalyst buffer materials for denitration
- fiber A crystalline SiO 2 / CaO fiber
- the SiO 2 content is 76 mass%
- the CaO content is 1 to 9 mass%
- the MgO content is 14 to 22 mass%
- Al 2 O 3 is 1 to 2 mass.
- % Amorphous SiO 2 / MgO fiber (hereinafter referred to as “fiber B”).
- the crystallization temperature of the fiber B was 857 ° C.
- the heat treatment temperature was 300 ° C, 400 ° C, 500 ° C, 600 ° C, 700 ° C, 800 ° C, 900 ° C, 1000 ° C, or 1100 ° C.
- the heat treatment time was 3 hours.
- inorganic fiber paper was manufactured. That is, 100 parts by weight of heat-treated fiber A or fiber B, 12 parts by weight of acrylic resin (AG-100: solid content 50%, manufactured by Showa Denko KK), and sulfuric acid band (aluminum sulfate: 0 1.2% by weight of 2% solution, manufactured by Daimei Chemical Co., Ltd., 0.1 part by weight of polyacrylamide (DS414: 0.5% solution, manufactured by Seiko PMC Co., Ltd.), and 2000 parts by weight.
- a raw material slurry was prepared by mixing with water. And using the commercially available papermaking apparatus, papermaking of the raw material slurry was performed, and the inorganic fiber paper was manufactured.
- the inorganic fiber paper was similarly manufactured using the fiber A or the fiber B which was not heat-processed.
- All of the manufactured inorganic fibrous papers had a thickness of 0.5 to 6 mm, a basis weight of 75 to 1800 g / m 2 , and a density of 0.15 to 0.3 g / cm 3 .
- the restoration rate after compression heating of the inorganic fibrous paper produced as described above was evaluated. That is, first, three test pieces each having a width of 25 mm and a length of 50 mm were cut out from arbitrary portions of each inorganic fibrous paper, and the thickness of each test piece (thickness before compression heating) was measured with a caliper.
- the thickness before compression heating was set to 100%, and the test piece was compressed until the thickness reached 50%. Further, the compressed test piece was placed in an electric furnace at 500 ⁇ 15 ° C. and held for 3 hours for compression heating. The specimen was then released from compression heating.
- the thickness of the test piece (thickness after compression heating) 0.5 hours after releasing the compression heating was measured with a caliper. And the ratio (%) of the thickness after compression heating with respect to the thickness before compression heating of a test piece was computed as a restoration rate.
- Fig. 1 shows the result of evaluating the restoration rate.
- the horizontal axis indicates the heat treatment temperature (° C.) of the heat treatment applied to the fiber A or fiber B contained in the inorganic fibrous paper (however, “untreated” is included in the inorganic fibrous paper).
- the fiber A or fiber B to be heated is not subjected to heat treatment.
- the vertical axis is compression heating of the inorganic fibrous paper containing the fiber A or fiber B heat-treated at each heat treatment temperature
- the subsequent restoration rate (%) is shown.
- black squares indicate the restoration rate of the inorganic fibrous paper containing the fiber A
- white circles indicate the restoration rate of the inorganic fibrous paper containing the fiber B.
- the restoration rate which concerns on each mark is an arithmetic average value of the value obtained about three test pieces.
- the fiber A or fiber contained in the inorganic fibrous paper is compared with the case where the heat treatment temperature is lower. There was a tendency for B to become brittle.
- the restoration rate exceeded 100%. That is, in this case, the inorganic fibrous paper after the compression heating expanded and its density was reduced.
- the recovery rate of the inorganic fibrous paper is remarkably improved while effectively avoiding the expansion of the inorganic fibrous paper and the embrittlement of the heat treated fiber. It was especially good.
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Abstract
Description
生理食塩水溶解率は、例えば、次のようにして測定される。すなわち、先ず、無機繊維を200メッシュ以下に粉砕して調製された試料1g及び生理食塩水150mLを三角フラスコ(容積300mL)に入れ、40℃のインキュベーターに設置する。次に、三角フラスコに、毎分120回転の水平振動を50時間継続して加える。その後、ろ過により得られた濾液に含有されている各元素の濃度(mg/L)をICP発光分析装置により測定する。そして、測定された各元素の濃度と、溶解前の無機繊維における各元素の含有量(質量%)と、に基づいて、生理食塩水溶解率(%)を算出する。すなわち、例えば、測定元素が、ケイ素(Si)、マグネシウム(Mg)、カルシウム(Ca)及びアルミニウム(Al)である場合には、次の式により、生理食塩水溶解率C(%)を算出する;C(%)=[ろ液量(L)×(a1+a2+a3+a4)×100]/[溶解前の無機繊維の質量(mg)×(b1+b2+b3+b4)/100]。この式において、a1、a2、a3及びa4は、それぞれ測定されたケイ素、マグネシウム、カルシウム及びアルミニウムの濃度(mg/L)であり、b1、b2、b3及びb4は、それぞれ溶解前の無機繊維におけるケイ素、マグネシウム、カルシウム及びアルミニウムの含有量(質量%)である。
SiO2とAl2O3とZrO2とTiO2との合計 50~82重量%
CaOとMgOとの合計 18~50重量%
SiO2 50~82重量%
CaOとMgOとの合計 10~43重量%
SiO2 66~82重量%
CaO 1~9重量%
MgO 10~30重量%
Al2O3 3重量%以下
他の酸化物 2重量%未満
SiO2 66~82重量%(例えば、68~80重量%、70~80重量%、71~80重量%又は71~76重量%とできる)
CaO 10~34重量%(例えば、18~32重量%、20~30重量%、20~27重量%又は21~26重量%とできる)
MgO 3重量%以下(例えば、1重量%以下とできる)
Al2O3 5重量%以下(例えば3.5重量%以下、3.4重量%以下又は3重量%以下とできる。また、1重量%以上、1.1重量%以上又は2重量%以上とできる)
他の酸化物 2重量%未満
第一の生体溶解性無機繊維として、SiO2含有量が73質量%、CaO含有量が21~26質量%、MgO含有量が1質量%以下、Al2O3を1~3質量%の非晶質のSiO2/CaO繊維(以下、「繊維A」という。)を準備した。繊維Aの結晶化温度は895℃であった。
上述のようにして製造された無機繊維質ペーパーの圧縮加熱後の復元率を評価した。すなわち、まず、各無機繊維質ペーパーの任意の箇所から、幅25mm、長さ50mmの試験片を3つずつ切り出し、各試験片の厚さ(圧縮加熱前の厚さ)をノギスで測定した。
この明細書に記載の文献の内容を全てここに援用する。
Claims (12)
- 400~1300℃で加熱処理した生体溶解性無機繊維と、バインダーとを含む無機繊維質ペーパーからなり、
前記生体溶解性無機繊維が以下の組成1~3のいずれかの組成を有するシール材又は緩衝材。
[組成1]
SiO2 66~82重量%
CaO 1~9重量%
MgO 10~30重量%
Al2O3 1~3重量%
但し、TiO2とMnOは含まない
[組成2]
SiO2 66~82重量%
CaO 10~34重量%
MgO 3重量%以下
Al2O3 1~5重量%
[組成3]
SiO2 66~82重量%
CaO 10~34重量%
MgO 3重量%以下
Al2O3 5重量%以下
その他の酸化物 2重量%未満 - 前記組成1~3において、アルカリ土類金属酸化物としてCaOとMgOのみを含む請求項1記載のシール材又は緩衝材。
- 前記組成1~3において、ZrO2は含まない請求項1又は2記載のシール材又は緩衝材。
- 結晶化温度未満の温度で加熱処理した請求項1~3のいずれかに記載されたシール材又は緩衝材。
- 400~1100℃で加熱処理した請求項1~4のいずれかに記載されたシール材又は緩衝材。
- 500~1100℃で加熱処理した請求項1~5のいずれかに記載されたシール材又は緩衝材。
- 500~900℃で加熱処理した請求項1~6のいずれかに記載されたシール材又は緩衝材。
- 圧縮加熱後の復元率が60%以上である請求項1~7のいずれかに記載されたシール材又は緩衝材。
- 前記緩衝材が脱硝用触媒緩衝材である請求項1乃至8のいずれかに記載されたシール材又は緩衝材。
- 以下の組成1~3のいずれかの組成を有する非晶質の生体溶解性無機繊維に400~1300℃の加熱処理を施す第一工程と、
前記加熱処理が施された前記生体溶解性無機繊維と、バインダーとを含む無機繊維質ペーパーを抄造する第二工程と、
を含む請求項1記載のシール材又は緩衝材の製造方法。
[組成1]
SiO2 66~82重量%
CaO 1~9重量%
MgO 10~30重量%
Al2O3 1~3重量%
但し、TiO2とMnOは含まない
[組成2]
SiO2 66~82重量%
CaO 10~34重量%
MgO 3重量%以下
Al2O3 1~5重量%
[組成3]
SiO2 66~82重量%
CaO 10~34重量%
MgO 3重量%以下
Al2O3 5重量%以下
その他の酸化物 2重量%未満 - 前記第一工程の前記加熱処理において、前記生体溶解性無機繊維を、その結晶化温度未満の温度で加熱する請求項10に記載されたシール材又は緩衝材の製造方法。
- 加熱及び又は保温のための設備であって、請求項1~9のいずれかに記載されたシール材又は緩衝材が組み込まれた設備。
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EP12764960.6A EP2634308B1 (en) | 2011-03-30 | 2012-03-21 | Inorganic fibrous paper, and method and equipment for manufacturing same |
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AU2012235474A AU2012235474B2 (en) | 2011-03-30 | 2012-03-21 | Inorganic fibrous paper, and method and equipment for manufacturing same |
KR1020137025243A KR101429418B1 (ko) | 2011-03-30 | 2012-03-21 | 무기 섬유질페이퍼 및 그 제조 방법 및 설비 |
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JP2021181383A (ja) * | 2020-05-18 | 2021-11-25 | イソライト工業株式会社 | 生理食塩水に可溶な耐熱性無機繊維 |
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JP5634637B1 (ja) | 2014-08-08 | 2014-12-03 | ニチアス株式会社 | 生体溶解性無機繊維 |
JP7264887B2 (ja) | 2017-10-10 | 2023-04-25 | ユニフラックス アイ エルエルシー | 結晶性シリカを含まない低生体内持続性の無機繊維 |
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DE102021211747A1 (de) | 2020-10-23 | 2022-04-28 | Thermal Ceramics Uk Limited | Wärmeisolierung |
DE102021211746A1 (de) | 2020-10-23 | 2022-04-28 | Thermal Ceramics Uk Limited | Wärmeisolierung |
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JP4977253B1 (ja) | 2012-07-18 |
AU2012235474A1 (en) | 2013-05-30 |
CN103339323A (zh) | 2013-10-02 |
KR101429418B1 (ko) | 2014-08-11 |
EP2634308A1 (en) | 2013-09-04 |
CN103339323B (zh) | 2015-07-29 |
EP2634308B1 (en) | 2016-03-16 |
KR20130124398A (ko) | 2013-11-13 |
AU2012235474B2 (en) | 2015-02-12 |
JP2012207341A (ja) | 2012-10-25 |
EP2634308A4 (en) | 2014-03-05 |
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