JP2013136848A - Inorganic fibrous formed article having high flexibility - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an inorganic fibrous formed article that has proper rigidity and also has high flexibility and cushioning properties.SOLUTION: The inorganic fibrous formed article contains an inorganic fiber containing at least a biosoluble inorganic fiber that has a composition comprising 70 to 82 wt.% of SiO, 10 to 29 wt.% of CaO, 1 wt.% or less of MgO and less than 5 wt.% of AlO, and an organic binder, but does not contain a thermosetting resin and an inorganic binder.

Description

  The present invention relates to an inorganic fibrous shaped body. In particular, the present invention relates to a felt-like inorganic fibrous shaped body having a high flexibility formed without using an inorganic binder.

  Inorganic fibers are lightweight, easy to handle, and excellent in heat resistance. For example, they are used as heat-resistant sealing materials. On the other hand, problems have recently been pointed out that inorganic fibers are inhaled into the human body and enter the lungs. In view of this, 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 Documents 1 and 2). The biosoluble inorganic fiber is subjected to secondary processing according to the application.

Among various processed products, joint materials in industrial kilns or incinerators, fireproof tiles, heat insulating bricks, iron skins, mortar refractories, etc. There is a need for a molded article that is compatible. In particular, when used as a heat sealing material for furnace lids such as home appliances, water heaters, industrial furnaces and electric furnaces, high flexibility and cushioning properties are required.
Furthermore, since such a molded article is used in a high temperature apparatus, it is also required that the heat shrinkage rate is small so as not to be deformed during use.

  In addition, since construction accuracy and dimensional accuracy are required for the construction of joints and the like, a certain degree of hardness is required. In addition, since ease of processing is required, self-sustainability is also required.

Japanese Patent Publication No. 3753416 JP-T-2005-514318 JP 2006-316366 A

  An object of the present invention is to provide an inorganic fibrous shaped body having moderate rigidity and high flexibility and cushioning properties.

According to the present invention, the following inorganic fibrous shaped body is provided.
1. Inorganic fibers containing at least biosoluble inorganic fibers having the following composition;
An organic binder,
However, it is an inorganic fibrous shaped body that does not contain thermosetting resin and inorganic binder.
[composition]
SiO ₂ 70~82 weight%
CaO 10-29% by weight
MgO 1 wt% or less Al ₂ O ₃ Less than 5 wt% 2. The inorganic fibrous shaped product according to 1, wherein the organic binder is a thermoplastic resin.
3. 3. The inorganic fibrous shaped product according to 2, wherein the thermoplastic resin is one or more selected from an acrylic resin, an acrylic-styrene copolymer, polyester, polyethylene, polypropylene, polystyrene, polyamide, and polyvinyl alcohol.
4). Furthermore, the inorganic fibrous fixed form in any one of 1-3 containing a fixing agent.
5. 5. The inorganic fibrous fixed body according to 4, wherein the fixing agent is one or more selected from aluminum, magnesium, calcium, sodium and salts thereof.
6). Furthermore, the inorganic fibrous fixed form in any one of 1-5 containing a pH adjuster.
7). 7. The inorganic fibrous molded article according to 6, wherein the pH adjuster is one or more selected from ammonia water and sodium hydroxide.
8). The inorganic fibrous fixed form according to any one of 1 to 7, comprising 0.01 to 50 parts by weight of the organic binder when the total amount of the inorganic fibers is 100 parts by weight.
9. The inorganic fibrous fixed form according to any one of 1 to 8, which accounts for 90% by weight or more of the inorganic fiber and the organic binder.
10. The inorganic fibrous fixed form in any one of 1-9 which is a felt shape.
11. The inorganic fibrous fixed form according to any one of 1 to 10, wherein the compression recovery rate is 91% or more when the compression rate is 30%.
12 The inorganic fibrous shaped material according to any one of 1 to 11, which has a compression recovery rate of 71% or more when the compression rate is 60%.
13. The inorganic fibrous shaped material according to any one of 1 to 12, wherein the compression recovery rate is 66% or more when the compression rate is 70%.
14 The inorganic fibrous shaped body according to any one of 1 to 13, wherein the amount of droop according to the overhunting test is 1 to 80 mm when the shift amount is 200 mm.
15. Mixing inorganic fibers including biosoluble inorganic fibers having at least the following composition and an organic binder,
Molded,
2. The method for producing an inorganic fibrous shaped product according to 1, wherein the molded product is dried at a melting temperature or lower.
[composition]
SiO ₂ 70~82 weight%
CaO 10-29% by weight
MgO 1 wt% or less Al ₂ O ₃ Less than 5 wt% 16. 16. The method for producing an inorganic fibrous shaped product according to 15, wherein the organic binder is a thermoplastic resin in the form of an emulsion or an aqueous solution.

  ADVANTAGE OF THE INVENTION According to this invention, it can provide an inorganic fiber fixed form body which has moderate rigidity, and a high softness | flexibility and cushioning property.

It is a figure for demonstrating the overhang test in an Example.

  The inorganic fibrous shaped body of the present invention includes at least a predetermined inorganic fiber (hereinafter also referred to as a specific inorganic fiber) and an organic binder. The inorganic fibrous fixed body of the present invention does not contain colloidal silica, metal alkoxide, etc., which are typical inorganic binders. Furthermore, thermosetting resins such as phenol resins and epoxy resins are not included. By including an organic binder, flexibility can be expressed.

  It is preferable to use a thermoplastic resin as the organic binder. Examples of the thermoplastic resin include acrylic resin, acrylic-styrene copolymer, polyester, polyethylene, polypropylene, polystyrene, polyamide, and polyvinyl alcohol. Acrylic resin is preferable. Acrylic resin is highly transparent and resistant to discoloration at high temperatures. The shaped product of the present invention may contain the organic binder in an unmelted state.

  Pulp, starch, etc. can be further contained as an organic binder. When pulp is included, the strength of the fibrous shaped body can be improved while maintaining flexibility.

The inorganic fibrous shaped product of the present invention can further contain a fixing agent, a pH adjuster, an antifoaming agent, and an aggregating agent. Examples of the fixing agent include aluminum, magnesium, calcium, sodium and potassium sulfate, nitrate, acetate, hydrochloride and the like. Examples of pH adjusters include ammonia water and sodium hydroxide. By adding appropriate amounts of commercially available antifoaming agents and flocculants, it is possible to facilitate the production of the molded body.
In addition, the inorganic fibrous shaped body of the present invention does not need to contain a heat-expandable inorganic powder such as unfired vermiculite, shirasu, nacre, obsidian, and heat-expandable graphite.

The specific inorganic fiber used in the present invention has the following composition. Fibers having the following composition are excellent in biosolubility and fire resistance after heating. This fiber is different from rock wool and glass fiber.
SiO ₂ 66~82 weight%
CaO 10-34% by weight
MgO 3 wt% or less Al ₂ O ₃ 5 wt% or less Total of SiO ₂ , CaO, MgO, Al ₂ O ₃ 98 wt% or more

Preferably, the following compositions can be exemplified.
SiO ₂ 66 to 82 wt% (e.g., 68 to 80 wt%, 70 to 80 weight percent, and 71 to 80 wt%, or 71 to 76 wt%)
10 to 34% by weight of CaO (for example, it can be 20 to 30% by weight or 21 to 26% by weight)
MgO 3 wt% or less (eg, 1 wt% or less)
Al ₂ O ₃ 5% by weight or less (eg, 3.5% by weight or less or 3% by weight or less. Also, 1% by weight or more or 2% by weight or more)
Other oxides <2% by weight

When SiO ₂ is in the above range, the heat resistance is excellent. When CaO and MgO are in the above range, the biosolubility before and after heating is excellent.

The Al ₂ O ₃ content can be, for example, 3.4% by weight or less or 3.0% by weight or less. Moreover, it can be 1.1 weight% or more or 2.0 weight% or more. Preferably it is 0 to 3 weight%, More preferably, it is 1 to 3 weight%. If Al ₂ O ₃ is contained within this range, the strength becomes high.

The above inorganic fibers include other oxides such as alkali metal oxides (K ₂ O, Na ₂ O, etc.), Fe ₂ O ₃ , ZrO ₂ , P ₂ O ₅ , B ₂ O ₃ , TiO ₂ , MnO, R ₂ O ₃ (R is selected from Sc, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, Y, or a mixture thereof) The above may or may not be included. Other oxides may be 0.2 wt% or less or 0.1 wt% or less, respectively. The alkali metal oxide may contain 0.2% by weight or less of each oxide, and the total of the alkali metal oxides may be 0.2% by weight or less.

Further, the total of SiO ₂ , CaO, MgO and Al ₂ O ₃ may be more than 98 wt% or more than 99 wt%.

The fibers having the above composition are biosoluble. In general, the biosoluble 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. Thereafter, 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 weight) of each element in the inorganic fiber before dissolution, the physiological saline dissolution rate (%) is calculated. That is, for example, when the measurement element is silicon (Si), magnesium (Mg), calcium (Ca), and aluminum (Al), the physiological saline dissolution rate C (%) is calculated by the following equation. C (%) = [filtrate amount (L) × (a1 + a2 + a3 + a4) × 100] / [weight of inorganic fiber before dissolution (mg) × (b1 + b2 + b3 + b4) / 100]. In this formula, 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 (weight%) of silicon, magnesium, calcium, and aluminum.

  As a manufacturing method of said specific inorganic fiber, well-known methods, such as a blowing method and a spinning method, are mentioned.

  The inorganic fibrous shaped body can contain other inorganic fibers in addition to the specific inorganic fibers described above. Of the total 100 parts by weight of inorganic fibers, the specific inorganic fibers can be 50% by weight or more, 60% by weight or more, 80% by weight or more, or 100% by weight.

  For example, containing refractory fibers (silica 4 to 35% by weight, alumina 75 to 96% by weight (for example, silica 20 to 30% by weight, alumina 80 to 70% by weight mullite fiber)) containing silica and alumina as main components. Can do. When such fibers are included, the compression recovery rate can be further improved.

Moreover, biosoluble fibers, such as rock wool, can also be included. When such fibers are included, the compression recovery rate can be further improved.
The chemical composition of rock wool can vary depending on the raw material. For example, the SiO ₂ content is 30 to 50% by mass, the Al ₂ O ₃ content is 10 to 20% by mass, the MgO content is 1 to 10%, CaO A fiber having a content of 20 to 40% by mass, a Fe ₂ O ₃ content of 0 to 3% by mass, and a MnO content of 0 to 1% by mass.

  In the present invention, the specific inorganic fiber may be used alone or in combination with other inorganic fibers. Examples of other inorganic fibers include carbon fibers, slag wool, glass wool, silica fibers, silicon carbide fibers, boron nitride fibers, zirconia fibers, calcium silicate fibers, and other natural mineral fibers.

  As described above, the inorganic fibrous shaped body can contain an antifoaming agent, an aggregating agent, a pH adjusting agent and the like in addition to the inorganic fiber, the organic binder, and the fixing agent.

  The amount of the organic binder is usually 0.01 to 50 parts by weight, preferably 1 to 45 parts by weight, more preferably 2.5 to 40 parts by weight, when the total amount of all inorganic fibers contained in the shaped body is 100 parts by weight. Parts, more preferably 2.5 to 15 parts by weight.

  The fixing agent is usually 0 to 20 parts by weight, preferably 0 to 15 parts by weight, more preferably 0.5 to 10 parts by weight, still more preferably 0.6 to 10 parts by weight, when the total amount of inorganic fibers is 100 parts by weight. Part, particularly preferably 0.6 to 4 parts by weight.

  The inorganic fibrous fixed body may be composed of 90% by weight or more, 95% by weight or more, 98% by weight or more, or 99% by weight or more of the total inorganic fiber, the organic binder, and the fixing agent.

  The inorganic fibrous shaped body is preferably a cloth-like or plate-like shape such as felt. Since the fixed body of the present invention has high flexibility, it is easy to change its shape, for example, it is easy to push between joints. Moreover, since the compression recovery rate is high, it is difficult to drop off even during use or after use at high temperatures, and the sealing property can be maintained. The thickness is not particularly limited, but is usually 5 mm or more, preferably 10 to 50 mm.

  Since the inorganic fibrous fixed body of the present invention does not contain an inorganic binder, the compression recovery rate can be improved. Moreover, since an inorganic binder is not included, the restorability of the inorganic fibrous shaped body is maintained even after use at high temperatures.

The so-called blanket produced by needle punching inorganic fibers does not contain organic binders, has poor rigidity and self-supporting properties, and is inferior in compression and resilience and cushioning as in the present invention. Rai.

So-called boards containing inorganic binders such as colloids produced by vacuum dehydration molding similar to felts of inorganic fibers are superior to blankets and felts in terms of rigidity and independence, but inferior in flexibility and cushioning properties. .

  The compression recovery rate is, for example, 91 to 100%, preferably 95 to 99% when the compression rate is 30%. For example, when the compression ratio is 60%, it is 71 to 97%, preferably 85 to 95%. For example, when the compression ratio is 70%, it is 66 to 93%, preferably 75 to 90%. The method for measuring the compression recovery rate is as described in the examples.

  The amount of droop in the overhunting test is, for example, 1 to 80 mm, preferably 5 to 20 mm when the shift amount is 200 mm, 2 to 140 mm, preferably 10 to 30 mm, and 300 mm when the shift amount is 250 mm. Is 3 to 220 mm, preferably 40 to 70 mm, 3 to 280 mm when the shift amount is 350 mm, preferably 100 to 150 mm, 3 to 340 mm when the shift amount is 400 mm, preferably 200 to 300 mm, and the shift amount is 450 mm 3 to 390 mm, preferably 250 to 350 mm, and 3 to 440 mm, preferably 300 to 400 mm when the shift amount is 500 mm.

The bulk density of the shaped product of the present invention is not particularly limited, but is usually 70 to 300 kg / cm ² , or limited to 130 to 250 kg / cm ² .

  The shaped body can be produced by wet molding. Specifically, the inorganic fiber containing the specific inorganic fiber, the raw material containing the organic binder, and the dispersion medium are mixed to form a slurry, and the slurry is cast into a mold and dried. Preferably, drying is performed at a melting temperature or lower. When a thermoplastic resin is used as the organic binder, it is preferably blended in the form of an emulsion or an aqueous solution. The shaped product of the present invention can be produced using a used shaped product, but it is not usually used because it is difficult to control the amount of organic matter. When the amount of organic matter increases, the amount of gas generated when heated increases.

Examples 1-8
(1) felt manufacturing SiO ₂ 73 wt%, the CaO 24 wt%, the MgO 0.3 wt%, the inorganic fibers containing _Al 2 _{O 3} 2 wt%, mullite fiber _(SiO 2 30 wt%, Al ₂ O ₃ 70 wt%), rock wool (SiO ₂ 40 wt%, CaO 35 wt%, MgO 5 wt%, Al ₂ O ₃ 13 wt%) and inorganic fibers selected from carbon fibers, acrylic emulsion (organic binder), Aluminum sulfate (fixing agent), aqueous ammonia (pH adjusting agent), silicon emulsion (antifoaming agent), dimethylaminoethyl methacrylate (flocculating agent), water are mixed, dehydrated, and dried at 100 to 130 ° C. A felt having a length of 600 mm, a width of 50 mm, and a thickness of 25 mm was produced. In Examples 1 to 8, the blending amount of each component is 5 parts by weight of an organic binder, 1.3 parts by weight of a fixing agent, 0.1 part by weight of a pH adjusting agent, 0.1 part by weight of an antifoaming agent, and 100 parts by weight of inorganic fibers. 3 parts by weight, 0.06 part by weight of a flocculant, and 5000 parts by weight of water. The amount of inorganic fibers was changed as shown in Table 1.

(2) Evaluation of felt The following evaluation was performed on the obtained felt. The results are shown in Tables 1 and 2.
(I) Compression recovery rate The compression recovery rate after compression was measured as follows. That is, three test pieces each having a width of 50 mm and a length of 50 mm were cut out from arbitrary portions of the felt, and the thickness of each test piece (thickness before compression) was measured with a caliper or a compression tester.

  Next, assuming that the thickness before compression was 100%, the test piece was compressed until the thickness reached a predetermined compression ratio (30%, 60%, 70%). After reaching the predetermined compression ratio, the pressure is held for about 30 seconds, and then the compression is released. The thickness was measured with calipers or a compression tester after about 30 seconds had passed after releasing the compression.

  And the ratio (%) of the thickness after compression release with respect to the thickness before compression of a test piece was computed as a restoration rate.

(Ii) Bulk density The width, length, and thickness of the sample described in (i) were measured with calipers, the weight was measured with a balance, and the bulk density was measured.

(Iii) Overhunting test As shown in FIG. 1, a felt of 600 mm in length, 50 mm in width, and 25 mm in thickness was placed on a desk and shifted so that a part of the sample protruded from the desk. As the amount of deviation from the desk increases, the amount by which the end of the sample hangs from the desk surface direction (horizontal direction) also increases. The amount of displacement and the amount of drool were measured. Table 2 shows the amount of droop (mm) relative to the amount of shift (mm).

Comparative Example 1 (Blanket)
After manufacturing the inorganic fiber A into a blanket with a needle punch, it was cut into a length of 600 mm × width of 50 mm × thickness of 25 mm, and then evaluated in the same manner as in Example 1. The results are shown in Tables 1 and 2.

Comparative Example 2 (Board)
100 parts by weight of inorganic fiber A, 3 parts by weight of starch (organic binder), 8 parts by weight of colloidal silica (inorganic binder), 2 parts by weight of polyacrylamide (flocculating agent), 5000 parts by weight of water are mixed, dehydrated and dried. A board having a length of 600 mm, a width of 50 mm and a thickness of 25 mm was manufactured and evaluated in the same manner as in Example 1. The results are shown in Tables 1 and 2.

  From Tables 1 and 2, the felt of Example 1 is more rigid and self-supporting than the blanket of Comparative Example 1, and the felts of Examples 1 to 8 are more flexible and have a compression recovery rate than the board of Comparative Example 2. I understand that it is expensive.

Examples 9-13
Inorganic fiber A, acrylic emulsion (organic binder), aluminum sulfate (fixing agent), ammonia water (pH adjusting agent), antifoaming agent, and flocculant are mixed, and in the same manner as in Example 1, length 600 mm × width 50 mm X A felt with a thickness of 25 mm was produced. The blending amount of each component is 0.06 part by weight of the flocculant with respect to 100 parts by weight of the inorganic fiber A in Examples 9 to 13, and the amount of the organic binder, antifoaming agent, fixing agent, and pH adjuster. Were changed as shown in Table 3. Evaluation was performed in the same manner as in Example 1. The results are shown in Table 3.

  From Table 3, it can be seen that the felts of Examples 9 to 13 are more flexible than the board of Comparative Example 2 and have a high compression recovery rate.

Examples 14 and 15
Inorganic fiber A, acrylic emulsion (organic binder), aluminum sulfate (fixing agent), aqueous ammonia (pH adjusting agent), antifoaming agent, flocculant, and pulp are mixed, and the length is 600 mm × as in Example 1. A felt having a width of 50 mm and a thickness of 25 mm was produced. In Examples 14 and 15, the amount of each component is 0.06 parts by weight of the flocculant, 100 parts by weight of the inorganic fiber A, 5 parts by weight of the organic binder, 0.3 parts by weight of the antifoaming agent, and the fixing agent. 1.3 parts by weight and 0.1 parts by weight of the pH adjuster, and the amount of pulp was changed as shown in Table 4. Evaluation was performed in the same manner as in Example 1. The results are shown in Table 4.

  From Table 4, it can be seen that even if pulp is added together with inorganic fibers, it does not affect the compression recovery property.

  The inorganic fibrous shaped body of the present invention can be used for various applications as a heat insulating material or as a substitute for asbestos.

An object of the present invention is to provide a hard straight property has a self-supporting and compression recovery properties and cushioning highly inorganic fibrous shaped body.

The present invention can provide a hard straight property has a self-supporting and compression recovery properties and cushioning highly inorganic fibrous shaped body.

The inorganic fibrous shaped body of the present invention includes at least a predetermined inorganic fiber (hereinafter also referred to as a specific inorganic fiber) and an organic binder. However, thermosetting resins such as phenol resins and epoxy resins are not included. By including such an organic binder, flexibility can be expressed. Inorganic fibrous shaped body of the present invention, typical colloidal silica as an inorganic binder, the metal alkoxy de does not include.

Examples 1-8
(1) felt manufacturing SiO ₂ 73 wt%, the CaO 24 wt%, the MgO 0.3 wt%, the inorganic fibers A comprising _Al 2 _{O 3} 2 wt%, mullite fiber _(SiO 2 30 wt%, Al ₂ O _{3 (} 70 wt%), rock wool (SiO ₂ 40 wt%, CaO 35 wt%, MgO 5 wt%, Al ₂ O ₃ 13 wt%) and inorganic fibers selected from carbon fibers, acrylic emulsion (organic binder) , Aluminum sulfate (fixing agent), aqueous ammonia (pH adjuster), silicon emulsion (antifoaming agent), dimethylaminoethyl methacrylate (flocculating agent), water, and dehydration molding, at 100 to 130 ° C It was dried to produce a felt having a length of 600 mm × width of 50 mm × thickness of 25 mm. In Examples 1 to 8, the blending amount of each component is 5 parts by weight of an organic binder, 1.3 parts by weight of a fixing agent, 0.1 part by weight of a pH adjusting agent, 0.1 part by weight of an antifoaming agent, and 100 parts by weight of inorganic fibers. 3 parts by weight, 0.06 part by weight of a flocculant, and 5000 parts by weight of water. The amount of inorganic fibers was changed as shown in Table 1.

Claims (16)

Inorganic fibers containing at least biosoluble inorganic fibers having the following composition;
An organic binder,
However, it is an inorganic fibrous shaped body that does not contain thermosetting resin and inorganic binder.
[composition]
SiO ₂ 70~82 weight%
CaO 10-29% by weight
MgO 1 wt% or less Al ₂ O ₃ less than 5 wt%   The inorganic fibrous shaped product according to claim 1, wherein the organic binder is a thermoplastic resin.   The inorganic fibrous shaped product according to claim 2, wherein the thermoplastic resin is one or more selected from an acrylic resin, an acrylic-styrene copolymer, polyester, polyethylene, polypropylene, polystyrene, polyamide, and polyvinyl alcohol.   Furthermore, the inorganic fibrous fixed form body in any one of Claims 1-3 containing a fixing agent.   The inorganic fibrous shaped product according to claim 4, wherein the fixing agent is one or more selected from aluminum, magnesium, calcium, sodium and salts thereof.   Furthermore, the inorganic fibrous fixed form body in any one of Claims 1-5 containing a pH adjuster.   The inorganic fiber molded body according to claim 6, wherein the pH adjuster is at least one selected from ammonia water and sodium hydroxide.   The inorganic fibrous shaped product according to any one of claims 1 to 7, comprising 0.01 to 50 parts by weight of the organic binder when the total amount of the inorganic fibers is 100 parts by weight.   The inorganic fibrous fixed form according to any one of claims 1 to 8, wherein the inorganic fiber and the organic binder occupy 90% by weight or more.   It is a felt form, The inorganic fibrous fixed form body in any one of Claims 1-9.   The inorganic fibrous shaped product according to any one of claims 1 to 10, wherein the compression recovery rate is 91% or more when the compression rate is 30%.   The inorganic fibrous shaped product according to any one of claims 1 to 11, wherein the compression recovery rate is 71% or more when the compression rate is 60%.   The inorganic fibrous shaped product according to any one of claims 1 to 12, wherein the compression recovery rate is 66% or more when the compression rate is 70%.   The amount of droop according to the overhunting test is 1 to 80 mm when the shift amount is 200 mm. Mixing inorganic fibers including biosoluble inorganic fibers having at least the following composition and an organic binder,
Molded,
The method for producing an inorganic fibrous shaped product according to claim 1, wherein the molded article is dried at a melting temperature or lower.
[composition]
SiO ₂ 70~82 weight%
CaO 10-29% by weight
MgO 1 wt% or less Al ₂ O ₃ less than 5 wt%   The method for producing an inorganic fibrous shaped product according to claim 15, wherein the organic binder is a thermoplastic resin in the form of an emulsion or an aqueous solution.