JPH0742100B2 - Method for producing zeolite molded body having antibacterial, antifungal and dew condensation preventing functions - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of use] The present invention relates to a zeolite compact having functionality. More specifically, the present invention provides a zeolite molded product having antibacterial, antifungal and dew condensation preventing functions and a method for producing the same.

[Prior Art] Known tiles used for the interior have a drawback that dew condensation occurs on the surface of the tile when the temperature decreases in a humid room. Condensation is not aesthetically pleasing, and water droplets may collect and fall. In addition, there is a serious drawback that sterilization and mold are likely to occur at a place where the condensed water evaporates slowly.

[Object of the Invention] The present invention also provides a method for producing a molded article having an antibacterial and antifungal function of a completely new type that has never existed before. The present invention also provides a molded product having a function of preventing dew condensation. That is, the present invention has an antibacterial and antifungal function suitable for interior decoration of humid rooms, has no defects such as cracks, powder drops, or cracks, has a dew condensation preventing function, and is relatively relatively compared to conventional products. Provided is a molded article having excellent durability that can be manufactured at a low temperature, and a method for manufacturing the same.

[Structure of the Invention] The present invention is that the zeolite powder granules holding a metal ion having a bactericidal action and the heat-fusible fiber are mixed at a temperature equal to or higher than the softening point of the fiber, and the fiber is the zeolite powder granule. The method for producing a zeolite molded product is characterized in that the mixture is pressure-molded at a temperature not lower than the softening point of the heat-fusible fiber.

In the present invention, it has been found that the heat-fusible fibers that have been heat-fused and pressure-bonded do not adversely affect the original antibacterial and antifungal functions and adsorption functions of the antibacterial zeolite. It has been found that the heat-fusible fiber is effective in strengthening the bond between zeolite powder or granules having antibacterial activity and remarkably improving the compressive strength and bending fracture strength of the zeolite compact. Further, it has been found that the use of the heat-fusible fiber significantly improves the water resistance of the zeolite molded body. The various zeolite moldings obtained by the present technology have excellent antibacterial and antifungal functions, and these functions are stably maintained over a long period of time. It was also confirmed that the zeolite molded product of the present invention also has an excellent moisture absorption or dehumidification function. Therefore, it was found that the zeolite molded product of the present invention is extremely effective as an interior material having antibacterial and antifungal functions, and also a dew condensation preventing function.

Generally, in the known molding method of zeolite, the zeolite powder is wet-mixed in the presence of water with a clay-based binder or an organic-based binder or, as the case may be, the two, and the obtained mixture is formed into an appropriate shape. Mold. It is customary to subsequently dry the shaped body at around 100 ° C. and then calcine it in the temperature range of 400 ° to 600 ° C. to obtain the final shaped body.

On the other hand, the zeolite molding method having antibacterial, antifungal and dew condensation preventing ability of the present invention is different from the usual wet molding method of zeolite, does not use water, and the molding temperature of the molded body is the firing of the general zeolite molded body. It is characterized by being significantly lower than the temperature.

The zeolite used as one of the molding materials in the present invention may be a natural or synthetic product, and the shape thereof is preferably powdery or granular. Prior to molding, these zeolites are given antibacterial properties by the method described below. As natural zeolite, mordenite, clinoptilolite,
Chabazite and the like are exemplified as preferable examples of the raw material used in the present invention, such as A-type, X-type and Y-type zeolite, synthetic mordenite, and high-silica zeolite as the synthetic zeolite. By allowing these zeolite materials to hold antibacterial or bactericidal metal ions prior to molding, the zeolite matrix is provided with antibacterial and antifungal functions. The antibacterial or bactericidal metal ion is usually stably retained in the zeolite solid phase by carrying out an ion exchange reaction. In the present invention, metal ions having a bactericidal action include silver, copper, zinc, mercury, tin, lead,
One or more metal ions selected from the group consisting of bismuth, cadmium and chromium are used. Preferably silver, copper or zinc is used. Using a solution of one or more salts of metal ions belonging to the above group, it is possible to perform ion exchange with ions in zeolite at room temperature or high temperature by a batch method or a column method. The amount of the sterilizing metal ion-exchanged and adsorbed in the zeolite phase can be easily adjusted by adjusting the salt concentration of the aqueous solution phase. By carrying out such a wet ion exchange method, a uniform distribution of bactericidal metal ions in the zeolite solid phase is achieved, and an antibacterial zeolite having preferable properties can be prepared.
Alternatively, an antibacterial zeolite material for molding may be prepared by appropriately mixing antibacterial zeolite prepared by ion exchange and a zeolite material (non-antibacterial), and containing a predetermined amount of metal ions having a bactericidal action as a whole. I can.

It should be noted that a certain type of inorganic retention matrix other than zeolite, for example, a matrix of amorphous aluminosilicate, etc., was prepared by preliminarily stably holding a required amount of antibacterial metal, and prepared a predetermined amount of the zeolite material. It is also possible to mix with (non-antibacterial) and prepare a zeolite powder or granule holding a metal having a bactericidal action and use it as a molding material.

By the way, the content of the metal ion having a bactericidal action in the zeolite compact varies depending on the type of metal used and the combination thereof, and also on the bacteria or fungus to be sterilized. For example, when using only silver, at least 5 ppm, when using only copper, at least 20 ppm, and when using only zinc, at least 60 ppm may be contained in the zeolite molded body for antibacterial or anti-bacterial properties. It is necessary to improve the mold effect. A combination of the above sterilizing metals, for example silver-
When copper or silver-copper-zinc ions are used, a synergistic effect is exhibited, and the antibacterial and antifungal effects of the molded product can be further enhanced.

Zeolite material containing metal ions having a bactericidal action prepared by the above method, preferably 100 ° ~ 1
It is dried at around 10 ° C. or is heat-activated in the temperature range of 250 ° to 500 ° C. and used for molding in a state where the water content is further lowered. Usually, the zeolite is
Drying at around 0 ° to 110 ° C to remove most of the attached water on the surface is sufficient for use. Therefore, even if water of crystallization remains in the various zeolite materials used, it does not hinder the molding of the present invention. In order to further impart a dew condensation preventing function to the zeolite material having bactericidal ability, it is more preferable to use a porous zeolite material having a large water adsorption capacity and a large specific surface area. In addition to the antibacterial and antifungal properties, the above-exemplified natural or synthetic zeolites having antibacterial properties further exhibit this dew condensation preventing property.
It is possible to further enhance the dew condensation prevention function by further adding a hygroscopic agent such as alumina, magnesia, calcium chloride, and water absorbent resin powder as a trace component to zeolite containing metal ions having a bactericidal action. is there.

Next, the heat-fusible fiber used in the present invention will be described. The heat-fusible fibers include adhesive fibers (eg, non-crystalline polyester), composite fibers (eg, nylon 6/66; polyethylene / polypropylene; copolyester / polybutyter), and heat-fusible fibers (eg, copolyamide, copolyester, etc.). Thermoplastic copolymer fibers: polypropylene, polyethylene, polyamide, polybutylene terephthalate, polyethylene terephthalate and other homopolymer fibers). These fibers are added to the antibacterial zeolite material in a necessary amount and heat-bonded in a mixing process under heating or a pressure molding process under heating. As the heat-bondable fiber, for example, polypropylene-based (single component type) Hercul
on T-151, Daiwabo PNS or PZS, polyethylene type (single molding type) Daiwabo BF, polypropylene type (composite type) Chisso ES, Daiwabo NBF and Danaklon
ES, ester type (single component type) Diolen 51, Kadel 41
0, Grilene K-170, Hetrofil Melty (Unitika) and Bell Combi (Kanebo), ester type (composite component type)
Diolen 56, Nylon-based Heterofil, vinyl chloride-based MP Fiber, Vinylon-HH (both are trademarks), and the like. Suitable low melting point Velcombi include Bellcombi-4000 (single component type) and 408 with a softening point of 110 ° C.
0 (core-sheath type), Belcombi-3300 (single-component type) with a softening point of 130 ° C, and 3380 (core-sheath type), Belcombi-2000 (single-component type) with a softening point of 200 ° C, and 2080 (core-sheath) Type) is exemplified. Further, N-501 (polyester) having a softening point of 256 ° C. is also included. The above-mentioned commercially available Bell Combi has a diameter of 2 to
Available in 6 denier and lengths of about mm to about 10 mm. Generally, as the heat-fusible fiber suitable for the present invention,
A softening point of 300 ° C or lower is desirable. In the production of the zeolite molded body having the antibacterial and antifungal functions and preferably the dew condensation preventing function of the present invention, at least one of the above-mentioned heat-fusible fibers has a softening point or higher, and preferably Heat fusion is performed at 300 ° C or lower. In order to obtain a zeolite molded product having excellent physical properties and having the above-mentioned functions, in general, the weight of the zelite material having a bactericidal metal ion (anhydrous basis) or if a bactericidal metal ion It has been found that the use of 3 to 65% by weight of the heat fusible fiber, based on the total weight of zeolite (anhydrous basis), is extremely effective when a zeolite that does not contain the above is used.

In the present invention, at least one of the above-mentioned heat-fusible fibers is used as a binder when forming the zeolite having bactericidal metal ions.

Furthermore, the following binders may be added to mold. In this case, as the binder, a liquid organic compound or a solid organic compound having the properties of the binder may be used as it is, or may be diluted with an appropriate non-aqueous solvent or diluent to have an appropriate viscosity. The amount of the above-mentioned binder used is governed by the type of zeolite material and heat-fusible fiber and the ratio of both used, but in order to keep the binding force between the particles good, it is relative to the total zeolite weight (anhydrous basis). It is preferred to use 3 to 35% by weight of binder.
In the production of the zeolite molded article of the present invention, a mixture of zeolite and a heat-fusible fiber holding a metal having a bactericidal action or a mixture obtained by further adding a binder to the mixture has a softening point of the heat-fusible fiber or higher. , And preferably 30
A mixing step at 0 ° C. or below is obtained. When using the latter mixture, the binder is particularly required to have heat resistance and low flammability. Examples of preferable binders having such properties include various polyesters such as Nipporan (trademark) manufactured by Nippon Polyurethane Industry Co., Ltd. Especially, a series of Niprolane having a viscosity in the range of 100 to 3000 cp (75 ° C.) is suitable for the present invention. For example, liquid Nipporan N-1004 [viscosity 600 to 900 cp (75 ° C); acid value 2 or less; hydroxyl value 39 to 47;
A molecular weight of about 2500 is very effective as a binder. It has been confirmed by the present inventors that this has the effect of smoothing the surface of the zeolite molded body and at the same time imparting flexibility and plasticity to the molded body in addition to the function as a binder.

The above-mentioned zeolite compact of the present invention is prepared as follows. Powdery or granular, preferably a dry product or a heat activated product of natural or synthetic zeolite containing a metal ion having a bactericidal action or a mixture of the product and a zeolite not containing the metal ion on the basis of anhydrous zeolite. Blends 3 to 65% of heat fusible fiber. In this case, the hygroscopic agent as described above may be added as a trace component. Mixing is preferably above the softening point of the heat-fusible fiber and
It is performed below 300 ° C. The optimum temperature at the time of mixing depends on the kind of the heat-fusible fiber used, but usually 100 ° to 270 ° C. is the most preferable temperature range. By carrying out the mixing step under such heating, the above fibers are in a softened or molten state, and the fibers are in a preferable state in which they are entangled with the zeolite particles. Further, a binder such as Nipporan N-1004 may be added to the above mixture in an amount of 3 to 35%, and the mixture may be mixed preferably in the above temperature range. Any mixture obtained above is in the above temperature range, preferably 100 °
The zeolite molding having the antibacterial and antifungal functions of the present invention can be obtained by pressure molding at a temperature of ~ 270 ° C. The molding pressure in this case depends on the required strength and apparent density of the molded product, but usually the antibacterial and antifungal function and dew condensation of the present invention have preferable characteristics by the molding pressure within the range of ^{2 to} 250 kg / cm ^2. A zeolite molded product having a preventive function is obtained. The zeolite molded product of the present invention may further contain a non-combustible or flame-retardant lightweight material. As the lightweight material used in the present invention, paper, pulp, and wood powder have some difficulties because they are flammable, and inorganic fillers and / or lightweight materials such as silica, alumina, pearlite, rock wool, and glass fiber. , Carbon fiber and the like are preferable. Also,
Pigments for coloring, fluorescent agents, powders of inorganic chemicals, metal powders, synthetic rubbers for improving elasticity, high water absorption resin powders or fibers for improving water absorption can be further added as minor components. . Examples of the colorant include cyanine blue, cyanine green, red bean, carbon black and the like. The lightweight materials, fillers and other additives are uniformly mixed with zeolite or the like having metal ions having a bactericidal action before pressure molding.

The molded product of the present invention also has heat insulating properties and soundproofing properties. The molded product of the present invention can be widely used in places where antibacterial or antifungal properties are required, and is particularly suitable as an interior material.

Next, the embodiments of the present invention will be described with reference to examples, but the present invention is not limited to the examples.

Example 1 In Example 1, a mixture of natural zeolite and synthetic zeolite, a mixture of a heat-fusible fiber and an organic binder is pressure-molded, and the present invention has antibacterial, antifungal and dew condensation-preventing functions. The present invention relates to a production example of the zeolite molded body. Dry natural mordenite zeolite (200
(Passing through a mesh) and A-type synthetic zeolite [NaZ (where Z is a matrix of A-type zeolite), passing through 200 mesh] is mixed as a heat-fusible fiber with Belconbee 40
80 [Trademark (Kanebo Co., Ltd.); Softening point 110 ° C; Shape 3d x 5 mm
(However, d is denier); core-sheath type] is added to the zeolite mixed powder in an amount of 10% by weight, and Belcombi-4000 [softening point 110 ° C .; shape 6d × 5 mm; single component type] is added in an amount of 12% by weight. Na Ag Cu Zn Z Antibacterial Zeolite 1
%, And the resulting mixture was mixed (kneading) while being kept under heating at 170 ° to 180 ° C. By mixing under heating in the above temperature range, the heat-fusible fiber is softened or melted, and the fiber is entangled in the zeolite to be firmly bonded to the preferable state. Furthermore, for the above mixture,
Nippon Polyurethane Industry Co., Ltd.'s Nipporan-1004 (trademark) was added as a binder in an amount of 7% by weight based on the dry zeolite mixed powder weight (zeolite anhydrous basis), and the mixing was continued under heating at 170 ° to 180 ° C. did. Then, the mixture obtained in the above step was subjected to a pressure of 150 Kg / at a temperature of 180 ° to 190 ° C.
A test plate (shape: 50 × 50 mm; thickness 10 mm) of the zeolite molded body of the present invention having an antibacterial, antifungal and dew condensation preventing function, which was pressure-molded at cm ² , was finally prepared. The content of bactericidal metal ions in the above test plate is Ag = 0.01
5%; Cu = 0.048%; Zn = 0.076%.

Table 1 shows the molding conditions of Example 1 and the characteristics of the obtained molded body. In Example 1, a dry powder (200 mesh pass) of an equal weight mixture of natural mordenite-A type zeolite was used, as described above.

As the antibacterial zeolite, a ternary system silver-copper-zinc / zeolite [Na Ag Cu Zn Z (where Z represents the matrix of A-type zeolite); Ag = 2.14%; Cu = 7.41%; Zn = 10.50%)
(Anhydrous basis)] was used at 1% by weight with respect to the above zeolite mixture. Comparative Example 1 relates to a blank test. That is, using the same type of zeolite mixed powder (dry product) as in Example 1, but without adding an antibacterial agent, molding was carried out under exactly the same conditions as in Example 1 to obtain a zeolite molded product (50 ×
50 mm; thickness 10 mm) was obtained. The bending strength of the dried molded product (final product) in Example 1 was 145 Kgf / cm ² ,
On the other hand, in Comparative Example 1 (blank test), it was 97.2 Kgf / cm ² .
All of these values are preferable values, indicating that the strength of the zeolite molded body obtained by the method of the present invention is extremely excellent. Further, the apparent density of the molded body is in the range of 1.4 to 1.6 g / cm ³ in each example. Next, a water immersion test was conducted on the zeolite molded bodies obtained in the present example and the comparative example. It was found that the adsorbed amount of water was 10.97% at 8 hours after the immersion of the molded body in water, which was almost saturated (Table 2). Take out the zeolite molded body (water absorption rate 12.67%) immersed in water for 120 hours,
It was confirmed that the bending fracture strength after drying this at 110 ° to 120 ° C was almost the same as the value of the dry molded body shown. No powder dropping or cracking was observed during the immersion of this zeolite molded product in water, and it was found that the water resistance strength is also extremely high.

The antibacterial and antifungal functions and the dew condensation preventing function will be collectively described later.

Example 2 In Example 2, the zeolite molded body of the present invention (shape 50 × 50 mm;
The present invention relates to another manufacturing example having a thickness of 10 mm). In this case, the same kind of zeolite material as in Example 1 was used, and molding was performed under the same molding conditions as in Example 1. However, in this example, ternary Na Ag Cu Zn Z is used as the antibacterial zeolite.
5% (same as Example 1) was added to the dry zeolite material. The obtained zeolite compact (content of bactericidal metal ions; Ag = 0.077%; Cu = 0.27%; Zn = 0.39
%) And the apparent density are 129 Kgf / cm ² and 1.53 g / cm ³ , respectively, as shown in Table 1. In the water immersion test, the water absorption rate was 13.49% as shown in Table 2.
Was obtained after 120 hours.

Example 3 Example 3 relates to a zeolite molded product of the present invention having an antibacterial, antifungal and dew condensation preventing function, which is obtained by pressure molding a mixture of an antibacterial zeolite and a heat-fusible fiber.

The antibacterial zeolite used in this example was prepared by the following method. Type A synthetic zeolite (sodium type: Na Z)
Dry powder (1.05 Na ₂ O ・ Al ₂ O ₃・ 1.99 SiO ₂・ × H ₂ O; average particle diameter Dav = 3.0 μm) 0.15M AgNO ₃ for about 2Kg
Add 4 L of 0.4 M Cu (NO ₃ ) ₂ mixed solution and water to bring the total volume to
It was 7.2 liters. 20 ~ 23 mixed solution containing the above slurry
The mixture was continuously stirred at ℃ for 6 hours. The solid phase of Na Ag Cu Z produced by the substitution by the above ion exchange reaction was filtered. Next, the solid phase was washed with water. Washing with water was performed until Ag ⁺ and Cu ²⁺ ions could not be detected in the filtrate. After washing with water, the solid phase was dried at 100 ° -110 ° C and then crushed to obtain fine powder of antibacterial zeolite [Na Ag Cu Z: Ag = 3.95%; Cu = 6.28% (anhydrous basis); Dav = 3.16 μm] of 1.89 Kg was obtained.

For the fine powder (dry product) of antibacterial zeolite obtained by the above-mentioned method, Belcombi N
-501 (softening point 256 ° C) 10% and Belcombi 4000 (softening point 110 ° C) 20% were added and mixed, and the resulting mixture was heated to 250 °
Mixing (kneading) while keeping under heating at ~ 260 ℃
did. By mixing under heating in the above temperature range, the heat-fusible fiber is softened or melted, and the fiber is entangled in the zeolite to be firmly bonded to the preferable state. Then blend obtained by the above mixing step, the antibacterial zeolite shaped body of the present invention having antifungal and condensation preventing function by pressing at a pressure 150 Kg / cm ² at a temperature of 250 ° to 260 ° C. A test plate (shape: 50 × 50 mm; thickness 10 mm) was prepared. The test plate described above contained Ag = 2.98%, Cu = 4.77% (dry basis at 250 ° C.).

As shown in Table 3, the bending fracture strength of the zeolite molded body obtained in this example was a surprising value of 189 Kgf / cm ² . From this, Bellcombi heat-fusible fiber N
Comparative Example 2, which was found to have an excellent effect as a binder fiber for the bonding between the zeolite particles, is related to the blank test. In this case, a simple A-type zeolite (Na Z; Dav = 3.0 μm) was used instead of the antibacterial zeolite used in Example 3, and molding was performed under the same conditions as in Example 3.

Evaluation of Antibacterial and Antifungal Functions Next, the antibacterial and antifungal effects of the zeolite molded product obtained by the present invention will be described. The mortality of bacteria was measured by the following method. Liquid (2 per 1 ml) in which 1 ml of bacterial suspension (10 ⁴ cells / 1 ml) is immersed in a test sample (small test piece obtained by cutting the zeolite molded body of the present invention)
(Including 00 mg of test piece) 9 ml
The mixture was allowed to act for a time, 0.1 ml of the solution was dispersed in a Mueller Hinton medium, and after 48 hours at 30 ° C., the number of surviving solids was measured to determine the mortality rate. In the above antibacterial test, Escherichia coli and Pseudomonas aeruginosa were used as bacteria, and Aspergillus flavus (Aspergus flavus) was used as mold (fungus).
illus flavus) was used.

The results of the antibacterial function evaluation test are shown in Table 4. Example 1
And 2 subjects were Escherichia coli and Aspergillu
It exhibits an excellent effect against s flavus, while the subject of Comparative Example 1 which does not contain antibacterial zeolite has almost no antibacterial effect against the above-mentioned bacteria and fungi. Is obvious. Subject of Example 3 Pseudomonas ae
100% death rate against ruginosa and Aspergillus flavus
However, the test sample of Comparative Example 2 containing no antibacterial zeolite showed no effect against the above-mentioned two kinds of bacteria and mold. From the above-mentioned evaluation test of antibacterial function, it is clear that the zeolite molded product of the present invention exhibits antibacterial and antifungal effects.

Evaluation of Dew Condensation Prevention Function Next, the dew condensation prevention function of the zeolite of the present invention will be described. Example 1 A small test piece (25 × 25 mm; thickness 10 mm) was prepared by cutting the produced compact. After reheating by vacuum heating at 200 ° C, changes in water absorption with time were measured in an atmosphere of a constant temperature and constant humidity at a temperature of 25 ° C and a relative humidity (RH) of 90%. Under the test conditions, the water absorption rate after 18 hours
It was found that the water absorption was 10.34%, 12.08% at 28 hours, and nearly saturated at 42 hours. From the water absorption curve shown in FIG. 1, it is clear that the zeolite molded product of the present invention has excellent hygroscopicity. 25 ℃, RH = 90%
Perform a dehumidification test using a test piece that is completely saturated with water at 25
When it was carried out in an atmosphere of ℃ and RH = 47%, it was confirmed that desorption of water in the subject was carried out favorably. From the above-mentioned tests, it is apparent that the zeolite molded product of the present invention has not only antibacterial and antifungal properties but also a binding preventing effect.

Next, the zeolite molded product having the antibacterial and antifungal functions of the present invention was subjected to a durability test under severe conditions. Molded articles obtained in Examples 1 and 3 (50 × 50 mm; thickness 10 m)
m), and those two types of specimens immersed in water and saturated with water are placed in liquid nitrogen (-195.8 ° C.) for about 8 minutes to allow the liquid nitrogen temperature to almost reach the above-mentioned value. These specimens were taken out. No abnormality such as cracking or damage was observed in any of the test objects. Subsequently, these samples were put into water. No cracks or cracks were found in any of the test objects placed in water. The appearance test was carried out by further pouring the above-mentioned subject put in water into hot water at 90 ° to 95 ° C, but no abnormality was found at all. Next, test the subject that has completed the above test at 100 ° to 110 °
After drying at 0 ° C., visual inspection and electron microscopy were performed. No abnormality was observed in any of the subjects. The shrinkages of the molded products obtained in Examples 1 and 3 under the temperature of liquid nitrogen were both 0.5% or less. From the above-mentioned durability test, it is apparent that the heat resistance, water resistance and cold resistance of the zeolite molded product of the present invention are extremely excellent. Such a feature is a special note of the present invention.

The features of the zeolite compact of the present invention are summarized below.

(A) The zeolite molded product of the present invention exhibits excellent antibacterial and antifungal functions.

(B) In addition to the antibacterial and antifungal properties, the zeolite molded product of the present invention has further excellent hygroscopicity or antimoisture ability. Moisture absorption and dehumidification are performed reversibly depending on the humidity of the atmosphere.

Therefore, the zeolite molded product of the present invention has a dew condensation preventing function. This is also advantageous for preventing the generation of mold.

(C) Since this molded product is strongly bonded by the heat-fusible fiber, it has extremely high strength, and cracks, powder drops, cracks, etc. occur during use as seen in ordinary zeolite molded products. No phenomenon is seen.

(D) The treatment temperature for obtaining the molded product of the present invention is lower than that during normal zeolite molding, preferably 30
Since the temperature is 0 ° C. or lower, the molded article of the present invention having antibacterial, antifungal and dew condensation preventing functions can be produced extremely economically.

(E) The bending fracture strength of the present molded article is governed by the molding pressure, the amount of the heat-fusible fiber added, and other factors, but generally a molded article having extremely high strength and elasticity is obtained. To be

(F) The zeolite molded body has a high water resistance.

The flexural fracture strength of the zeolite molded product, which was dried by immersing in water and saturating the water, shows almost the same value as that at the time of production. In addition, no phenomenon such as cracking, pulverization, or cracking is observed in the process of immersing the molded body in water for saturated adsorption. At that time, the elution of the zeolite component and the antibacterial metal composing the molded body into water is extremely small and negligible. Furthermore, the swelling property of the molded product is very small, and the elongation in length when saturated with water is 0.5% or less.

(G) The molded product of the present invention is structurally stable from a high temperature of 300 ° C. to a low temperature region. At liquid nitrogen temperature, the moldings are very stable and the shrinkage of the moldings is less than 0.5%.

(H) The molded product of the present invention is excellent not only in antibacterial, antifungal and dew condensation preventing functions but also in heat insulation and soundproofing.

(I) From the characteristics of the zeolite molded body of the present invention, the molded body of the present invention is suitable, for example, as an interior material.

[Brief description of drawings]

FIG. 1 is a water absorption curve of the zeolite molded product of the present invention at a temperature of 25 ° C. and a relative humidity of 90%.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Satoru Ando Satoru Ando 5 1-2, 5-1, Kagino Nishi, Joto-ku, Osaka City, Osaka Prefecture -402 (72) Inventor Kazuo Sawada 1-10-129, Higashiota, Ibaraki-shi, Osaka (56) References JP-A-60-181002 (JP, A) JP-B 61-22977 (JP, B2)

Claims (8)

[Claims] 1. A zeolite powder granule holding a metal ion having a bactericidal action and a heat-fusible fiber are mixed at a temperature equal to or higher than the softening point of the fiber, and the fiber is entangled with the zeolite powder granule. A method for producing a zeolite molded body, which is characterized in that the mixture is pressure-molded at a temperature not lower than the softening point of the heat-fusible fiber. 2. The method for producing a zeolite molded product according to claim 1, wherein a zeolite powder granules having a metal ion having a bactericidal action and a heat-fusible fiber are further mixed with a binder. 3. The method according to claim 2 or 3, further comprising a non-combustible or flame-retardant filler and / or a lightweight material. 4. The heat-fusible fiber has a softening point of 300 ° C. or lower, and the pressure molding is performed at a temperature of 300 ° C. or lower, according to any one of claims 1 to 3. the method of. 5. The method according to any one of claims 1 to 4, wherein the heat fusible fiber is a polyester fiber. 6. The method according to claim 1, further comprising admixing a zeolite which does not retain a metal ion having a bactericidal action. 7. The total weight of zeolite (anhydrous basis) is 3
~ 65% by weight of heat fusible fiber.
7. The method according to any one of item 6. 8. The total weight of zeolite (on an anhydrous basis) is 3
8. A method according to any one of claims 1 to 7 comprising .about.35% by weight binder.