JPS6379719A - Molded body of zeolite having antibacterial and fungistatic function and its production - Google Patents

Abstract

PURPOSE:To economically obtain the titled molded body suitable for an interia material free from crack, powder falling and split, and having excellent strength, dew condensation preventive function, water resisting property and durability by compression molding a mixture consisting of a powdery and granular zeolite held metallic ion having sterilizing power and a fiber having heat fusion property. CONSTITUTION:The powdery and granular zeolite body (A) held metallic ion having sterilizing power is obtained by subjecting a powdery or granular and natural or synthetic zeolite to ion-exchange in a salt soln. contg. >= one kind among metallic ions having sterilizing power such as Ag, Cu, Zn, Hg, Pb, Bi, Cd and Cr, at ordinary or higher temp., Then component A is mixed with (B) 3-65wt% (to component A) of the fiber having heat fusion property and having soften point of <=300 deg.C such as non-crystalline polyesters at above the softening point of component B and below 300 deg.C, and if necessary, (C) 3-35wt% of a bonding agent such as one among polyesters and (D) an imconbustible or fire resisting packing material and/or a light weight material, etc., are added and mixed. Then the mixture is compressed and molded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a zeolite molded body having functionality. More specifically, the present invention provides a zeolite molded body having antibacterial and antifungal functions and a method for producing the same. In addition to the above functions, this zeolite molded body also has a dew condensation prevention function.

[Prior Art] Known tiles used for interior decoration have the disadvantage that dew condenses on their surfaces when the temperature drops in a humid room. Condensation is not aesthetically pleasing and may cause water droplets to collect and fall. In addition, there is a serious drawback that sterilization and mold are likely to occur in areas where condensed water evaporates slowly.

[Object of the Invention] The present invention provides a molded article having a completely new type of antibacterial and antifungal function that has not been seen heretofore, and a method for producing the same. The present invention provides a molded article which also has a function of preventing dew condensation. In other words, the present invention has antibacterial and antifungal functions suitable for interior use in rooms with high humidity,
A molded article with excellent durability that is free from defects such as cracks, falling powder, or cracks, preferably has a dew condensation prevention function, and can be manufactured at a relatively lower temperature than conventional products, and a method for manufacturing the same. I will provide a.

[Structure of the Invention] The present invention is a zeolite molded body having antibacterial and antifungal functions, which includes zeolite powder holding metal ions having a bactericidal effect and heat-fusible fibers, which are fused and bonded together. . Furthermore, the zeolite molded article of the present invention may contain a binder in addition to the above-mentioned components. Desirably, these novel olide molded bodies have antibacterial and antifungal properties as well as anticondensation properties.

Roughly speaking, the present invention involves mixing zeolite powder holding metal ions having a bactericidal effect with heat-fusible fibers, preferably further a binder, and then mixing the above-mentioned zeolite powder at a temperature equal to or higher than the softening point of the heat-fusible fibers. The method for producing a zeolite molded body further includes press-molding the mixture.

In the present invention, it has been found that the heat-fusible fibers that are heat-fused and pressurized do not have any adverse effect on the antibacterial and antifungal functions and Ia adsorption ability inherent to antibacterial zeolite.

It has been found that heat-fusible fibers are effective in strengthening the bond between zeolite powders or grains having antibacterial properties and in significantly improving the compressive strength and bending fracture strength of zeolite molded bodies. It has also been found that the use of heat-fusible fibers significantly improves the water resistance of zeolite molded bodies.

The various zeolite molded bodies obtained by this technology have excellent antibacterial and antifungal functions, and these functions are maintained stably for a long period of time. Furthermore, it was confirmed that the zeolite molded article of the present invention also has excellent moisture absorbing and dehumidifying functions. Therefore, it has been found that the zeolite molded article of the present invention is extremely effective as an interior material having antibacterial and antifungal functions as well as dew condensation prevention functions.

In general, known methods for shaping zeolites involve wet blending zeolite powder with a clay-based binder or an organic binder, or possibly both, in the presence of water, and shaping the resulting blend into a suitable shape. Shape. It is customary to subsequently dry the molded body at around 100°C and then sinter it in a temperature range of 400' to 600°C to obtain the final molded body.

On the other hand, the method for molding zeolite with antibacterial and antifungal abilities of the present invention is different from the conventional wet molding method for zeolite.
It is characterized in that no water is used and the molding temperature of the molded body is significantly lower than the firing temperature of general zeolite molded bodies.

The zeolite used as one of the molding materials in the present invention may be either natural or synthetic, and its shape is preferably powder or granules. Prior to molding, these zeolites are given antibacterial properties by the method described below. Natural zeolites include mordenite, clinoptilolite, chabasite, etc., and synthetic zeolites include type A and type X.
Preferred examples of materials used in the present invention include type and Y type zeolites, synthetic mordenite, high silica zeolites, and the like. By allowing these zeolite materials to retain antibacterial or bactericidal metal ions prior to molding, antibacterial and antifungal functions are imparted to the zeolite matrix. Antibacterial or bactericidal metal ions are usually stably retained in the zeolite solid phase by carrying out an ion exchange reaction. In the present invention, metal ions having a bactericidal effect 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, ion exchange with the ions in the zeolite can be carried out by a batch method or a column method at room temperature or elevated temperature. The amount of metal having a bactericidal effect adsorbed in the zeolite phase by heion exchange can be easily adjusted by adjusting the salt concentration of the aqueous phase. By carrying out such a wet ion exchange process, a uniform distribution of bactericidal metal ions in the zeolite in-phase can be achieved and antibacterial zeolites with favorable properties can be prepared. Alternatively, an antibacterial zeolite material for molding that contains a predetermined amount of metal ions having a bactericidal effect as a whole can be prepared by appropriately mixing an antibacterial zeolite prepared by ion exchange with a zeolite material (non-antibacterial). I can do it.

In addition, some kind of inorganic holding matrix other than zeolite, such as amorphous fluminosilicate, is prepared in advance to stably retain the four necessary antibacterial metals, and this is added to a predetermined amount of the zeolite material. (non-antibacterial) can also be used as a molding material by preparing a powder of biolite that retains a metal that has a bactericidal effect.

By the way, the content of metal ions having a bactericidal effect in the zeolite molded body varies depending on the types of metals used, the combination thereof, and the bacteria and fungi to be sterilized. For example, if only silver is used, at least 5f)t)
m, at least 20 ppm if only copper is used,
Further, when only zinc is used, it is necessary that at least 60 ppm of zinc be contained in the zeolite molded body in order to increase the antibacterial or antifungal effect. When the above-mentioned sterilizing metals are combined, for example, silver-copper or silver-copper-zinc ions are used, a synergistic effect is exhibited, and the antibacterial and antifungal effects of the molded article can be further enhanced.

The zeolite material containing metal ions having a bactericidal action prepared by the method described above is preferably heated at 100°
Dry at around ~110°C or 250°~50°C
It is heat-activated in a temperature range of 0°C and is used for molding in a state where the moisture content is further reduced.

In normal cases, the zeolite is
It can be used sufficiently if it is dried at around °C to remove most of the water adhering to its surface. Therefore, even if water of crystallization remains in the various zeolite materials used, there is no problem with the molding of the present invention. In order to further provide a dew condensation prevention function to a zeolite material having a sterilizing ability, it is more preferable to use a porous zeolite material that has a large water adsorption capacity and a large specific surface area. The above-mentioned natural or synthetic zeolites that have been made antibacterial exhibit antibacterial and antifungal properties, as well as anticondensation properties.

It is also possible to further enhance the dew condensation prevention function by adding trace components of hygroscopic agents such as alumina, magnesha, calcium chloride, and water-absorbing resin powder to zeolite, which contains metal ions that have a bactericidal effect. be.

Next, the heat-fusible fiber used in the present invention will be explained. Heat-fusible fibers include adhesive fibers (for example, amorphous polyester), composite fibers (for example, nylon 6/66: polyethylene/polypropylene: copolyester/polyester), and heat-fusible fibers (for example, copolyamide, copolyester, etc.). thermoplastic copolymer fibers: homopolymer fibers such as polypropylene, polyethylene, polyamide, polybutylene terephthalate, polyethylene terephthalate, etc.). The required amount of these fibers is added to the antibacterial zeolite material, and the fibers are heat-fused during mixing under heating and pressure molding under heating.

Examples of thermal adhesive fibers include polypropylene-based (single-component type) 1lerculon T-151, Daiwabo PNS or PZS, polyethylene-based (single-component type) Daiwabo O, polypropylene-based (multi-component type)
Chisso ES, Daiwabo NBF and Danak! O
nES.

Ester-based (single component type) DiOlen 51, K
ade1410, Gr++ene K-170,
HetrOfi1 Melty (Unitika) and Bell Combi (Gobo), ester-based (multi-component type) DiOIen
56, and 1 letter of nylon
+, vinyl chloride-based HP Fiber.

Examples include V i ny+ On- (both are trademarks). Suitably used low-melting-point Belcombis include Belcombi-4000 (single-component type) and 4080 (core-sheath type) with a softening point of 110°C, Belcombi-3300 (single-component type) with a softening point of 130°C, and Examples include 3380 (core-sheath type), Belcombi-2000 (single-component type) with a softening point of 200°C, and 2080 (core-sheath type). Another example is N-501 (polyester), which has a softening point of 256°C. The above-mentioned commercially available bell combinations are easily available with a diameter of 2 to 6 deniers and a length of about several meters to several tens of meters. Generally, heat-fusible fibers suitable for the present invention preferably have a softening point of 300° C. or lower. When producing the zeolite molded article of the present invention having antibacterial and antifungal functions, and preferably also having dew condensation prevention functions, the above-mentioned heat treatment is required. !
! One or more of the adhesive fibers is heated at a temperature above its softening point and preferably below 300°C. In order to obtain a zeolite molded body that possesses excellent physical properties and has the above-mentioned functions, the weight of the zeolite material containing bactericidal metal ions (anhydrous basis) or, if the bactericidal metal ions are It has been found that when a zeolite that does not have a zeolite is used, it is extremely effective to use 3 to 65% by weight of heat-fusible fibers based on the weight of the zeolite (anhydride group Q).

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

Additionally, the following binder may be added to the molding material. In this case, as the binder, a liquid organic compound or a solid organic compound having the properties of a binder may be used as is, or diluted with a suitable non-aqueous solvent or diluent to obtain an appropriate viscosity. The amount of the above-mentioned binder used is controlled by the type of zeolite material and heat-fusible fiber as well as the ratio of the two used, but in order to maintain good bonding force between particles, it is necessary to Preferably, 3 to 35% by weight of binder is used. In the production of the zeolite molded article of the present invention, the mixture consisting of zeolite retaining a metal having a bactericidal action and heat-fusible fibers, or the mixture formed by adding a binder to the above-mentioned particles, has a softening point of the heat-fusible fibers. The mixing step is carried out at temperatures above and preferably below 300°C. When using the latter mixtures, it is particularly required that the binder be heat resistant and of low flammability. Preferred binders having such properties include various polyesters, such as Niraporan (trademark) manufactured by Nippon Polyurethane Industries, Ltd. In particular, the Nibolane series with viscosities in the range of 100 to 3000 cp (75°C) are suitable for the present invention.

For example, liquid Niboran N-1004 (viscosity 600~
900CI) (75℃): Acid value 2 or less: Hydroxyl value 3
9-47: A molecular weight of about 2500 is very effective as a binder. The present inventors have confirmed that, in addition to acting as a binder, 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.

The zeolite molded article of the present invention described above is prepared as follows. Preferred on an anhydrous zeolite basis for powdered or granular dry products or heat-activated amounts of natural or synthetic zeolites containing metal ions with bactericidal activity, or mixtures of these with zeolites that do not contain the above metal ions. is mixed with 3 to 65% heat-fusible fiber. In this case, a moisture absorbent as described above may be added as a trace component. The mixing is preferably carried out at a temperature above the softening point of the heat-adhesive fiber and below 300°C. The optimum temperature during mixing depends on the type of thermal FmI fiber used, but is usually 1000~
270°C is the most preferred temperature range. By carrying out the mixing step under such heating, the above-mentioned fibers are softened or melted, and the fibers become entangled with the zeolite particles, which is a preferable state. Additionally, a binder, such as Nirabolan N-1004, is added to the above mixture at 3 to 3
5% and this may be mixed preferably in the temperature range mentioned above.

Any of the mixtures obtained above is pressure-molded in the above-mentioned temperature range, preferably at a temperature of 43,100° to 270°C, to obtain the zeolite molded article having antibacterial and antifungal functions of the present invention. The molding pressure in this case is usually 2 to 250 υ /
The zeolite molded article of the present invention, which has preferable properties and has antibacterial and antifungal functions and anticondensation functions, can be obtained by molding pressure within the range of cd. The zeolite molded article of the present invention may contain a roughly non-flammable or flame-retardant lightweight material. The lightweight materials used in the present invention include paper, pulp, and wood flour, which have some drawbacks because they are flammable, and inorganic fillers and/or lightweight materials, such as silica, alumina, perlite, rock wool, and glass fiber. , carbon fiber, etc. are preferred. In addition, pigments for coloring, fluorescent agents, inorganic chemical powder, gold flower powder, synthetic rubber to improve elasticity, and high water absorption resin powder or fibers to improve water absorption are further added as small components. be able to. Examples of the coloring agent include cyanine blue, cyanine green, Bengara, and carbon black. Light weight materials, fillers and other additives are homogeneously mixed with zeolites etc. carrying metal ions with bactericidal action before compaction.

The molded article of the present invention also has heat insulation and sound insulation properties. The molded article 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, embodiments of the present invention will be described with reference to Examples, but the present invention is not limited to these Examples.

Example 1 Example 1 shows the present invention, which has antibacterial, antifungal, and anticondensation functions, and is made by pressure molding a mixture of natural zeolite and synthetic zeolite, heat-fusible fibers, and an organic binder. The present invention relates to an example of manufacturing a biolite molded body. Dried natural mordenite zeolite (200
Bell Combi-4080 (Trademark: Kanebo Co., Ltd.) was used as a heat-fusible IA fiber for a mixed powder of equal weight of A-type synthetic acid zeolite (Na Z (where Z is the matrix of A-type zeolite), passed through 200 meshes). Ltd.) ; Softening point 1
10°C; shape 3dX5m (where d is denier; core-sheath type) was 10% by weight based on the zeolite mixed powder surroundings, and Belcombi-4000 (softening point 110°C; shape 6dX)
5m: single component type) was added at 12% by weight, and Na A! ;I COZn Z Antibacterial Zeolite 1
% and the resulting mixture was kneaded while being heated at 170° to 180°C.

By mixing under heating in the above-mentioned temperature range, the heat-fusible fibers are softened or melted, and the fibers are entangled with the zeolide and are firmly bonded, which is a preferable state. Further, to the above mixture, 7% by weight of Nippon Polyurethane Kogyo's Niboran-1004 (trademark) as a binder was added to the above dry zeolite mixed powder method (zeolite anhydrous basis), and the mixture was roughly mixed at 170°. Continued under heating to ~180°C. Next, the mixture obtained in the above step was heated at 180° to 19°
Pressure is 150 at a temperature of 0℃! A test plate of the zeolite molded body of the present invention that is pressure-molded with IF/CIi and has antibacterial, antifungal, and dew condensation functions (shape: sox
50 m: thickness 10712111> was finally prepared. The content of bactericidal metal ions in the above test plate was Ag=0,015%; CLI=0.048%;
7-n = 0.076%.

Table 1 shows the molding conditions of Example 1 and the characteristics of the molded product obtained. In Example 1, as described above, a dry powder (passed through 200 meshes) of an equal mixture of natural mordenite = type A zeolite was used.

Antibacterial biolites include ternary silver-copper-zinc/zeolite (Na A!11 Cu Zn Z (however, Z
represents the matrix of type A zeolite); AU=2.14%
; Qu = 7.41%; Zn = 10.50% (
Anhydrous basis)) was used at 1 type % for 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 zeolide molded body (50 x 50
g; thickness: 10 m) was obtained.

The bending fracture strength of the dry compact (final product) was 145 Ky f/cri in Example 1, while it was 97.2 Ky f/C in Comparative Example 1 (blank test)! It was i. These values are all preferable values and indicate that the strength of the zeolite molded article obtained by the method of the present invention is extremely excellent. Moreover, the apparent density of the molded bodies is in the range of 1.4 to 1.69/Cfn3 in all examples. Next, a water immersion test was conducted on the 1q zeolite molded bodies according to the present example and comparative example. After 8 hours of immersing this molded body in water, the water adsorption factor was 10
．． It was found that it was 97%, almost saturated (second
table). A zeolite molded body (water absorption rate 12.67%) that had been immersed in water for 120 hours was taken out and
It was confirmed that the bending fracture strength after drying at 20° C. was almost the same as the value of the dry molded product listed above. No powder falling or cracking was observed during immersion of the zeolite molded body in water, and it was found that its water resistance was extremely high.

Note that the antibacterial and antifungal functions and the anticondensation function will be collectively described later.

Example 2 Example 2 is a zeolite molded article of the present invention (shape 50×50
m: thickness 10. ) is related to another manufacturing example. In this case, the same type of zeolite material as in Example 1 was used, and the molding was carried out under the same molding conditions as in Example 1. However, in this example, ternary Na AU was used as the antibacterial zeolite.
COZn Z (same as Example 1) was added at 5% to the dry zeolite material. 1q zeolite molded body (contains bactericidal metal ions, l:Ag=0.
077%: CLl=0.27%; Zn=0.39
%) bending fracture strength and apparent density are 129 Kg f/ctA and 1.5, respectively, as shown in Table 1.
39/cm3, and in the water immersion test, as shown in Table 2, a water absorption rate of 13.49% was obtained after 120 hours.

Table 2 Relationship between water immersion time and water absorption rate of zeolite molded body (water temperature 20°C) After 8 hours After 52 hours After 12020 hours 10.97 11.38 12.672
12.37 13.17 13.49 Comparative Example 1
15.37 15.97 15.95 Example 3 Example 3 is a zeolite of the present invention having antibacterial, antifungal, and anticondensation functions obtained by molding a mixture of antibacterial biolite and heat-tolerant fibers. This invention relates to a molded article.

The antibacterial zeolite used in this example was prepared by the following method. A-type synthetic zeolite (sodium type: NaZ
) dry powder (1,05Na 20”Ag2O3・
1.99 S! O' XH20: average particle diameter [)a,
V=3. A of 0.15 M for oμm > approx. 2 KI
Cl NO3 and 0.4 M cu (NO3>2 mixed solution 4ρ and water were added to make the total volume 7.2 B. The mixed solution containing the above slurry was continuously heated at 20 to 23 °C for 6 hours. The solid phase of NaAgCuZ produced by substitution through the above ion exchange reaction was filtered.The solid phase was then washed with water.
After washing with water, the solid phase was dried at ~110°C and crushed to obtain a fine powder of antibacterial zeolite (Na AgCLI Z:
A (II = 3.95%: Cu = 6.28% (anhydrous standard); Dav = 3.16 μm) at 1.89K
I got i.

Antibacterial zeolite fine powder obtained by the above method (
dry product), Bellcombi N-
501 (softening point 256℃) 10% and Bell Combi 40
00 (softening point 110°C) was added and mixed at 20%, (
The mixture was kneaded while being heated at 250° to 260°C. By mixing under heating in the above-mentioned temperature range, the heat-fusible fibers are softened or melted, and the fibers are entangled with the zeolide and are firmly bonded, which is a preferable state.

Next, the mixture obtained in the above mixing step was heated at 250° to 260°
A test plate (shape: 50 x 50s: thickness 10al) of the zeolite molded body of the present invention having antibacterial, antifungal, and dew condensation functions was prepared by pressure molding at a pressure of 150° C. and 3/cm. The above test plate is AQ
-2.98% Cu, -4.77% (based on dry product at 250°C).

The bending fracture strength of the zeolite molded body obtained in this example was 189 K'J f/c as shown in Table 3.
It was an amazing value of rA. From this, it was found that the combination of Bellcombi heat-fusible II fibers N-501 and 4000 exhibited an excellent effect as a binder fiber for bonding between zeolite particles.Comparative Example 2 was related to a blank test. be. In this case, instead of the antibacterial zeolite used in Example 3, a simple type A zeolite (
Molding was carried out under the same conditions as in Example 3 using Na Z : Dav -3,0 am).

Evaluation of antibacterial and antifungal functions Next, the antibacterial and antifungal effects of the zeolite molded article obtained by the present invention will be described. The mortality rate of bacteria was measured by the following method. Bacterial suspension (
Inject 104 pieces/1d>1 fft' into 9 m of the liquid (including test pieces of 200 #tSF per 1 d) in which the test object (a small test piece obtained by cutting the zeolite molded body of the present invention) is immersed. Pour the mixture and let it react at 37°C for 24 hours.
1 m) was dispersed in Iueller 1llriton medium, the number of surviving individuals was measured after 48 hours at 30°C, and the mortality rate was determined. Escherichia coli was used as the bacterium for the above antibacterial test.
and Pseudomonas aeruginosa, and Aspergillus flavus was used as the mold (fungus).

The results of the antibacterial function evaluation test are shown in Table 4.

The test subjects in Examples 1 and 2 were Escherichia
colt and ASpergillus flavus
On the other hand, it is clear that the sample of Comparative Example 1, which does not contain antibacterial zeolite, has almost no antibacterial effect against the above bacteria and molds (fungi). It is. The analyte of Example 3 was PSeUdOmOna
Saerug i nosa and ASpergillus S
The killing rate was 100% against P. flavus, demonstrating excellent effectiveness.On the other hand, in the test sample of Comparative Example 2, which did not contain antibacterial zeolite, no effect was observed against the above two types of bacteria and mold. There wasn't. From the above evaluation test for antibacterial function, it is clear that the zeolite molded article of the present invention exhibits antibacterial and antifungal effects.

Table 4 Example of evaluation test for antibacterial function Escherichia pseudomonas Aspergillus coli Aeruginosa flavus 1
100 89.32
ioo io.

Comparative example 1 7.1
0 Evaluation of dew condensation prevention function Next, the dew condensation prevention function of the zeolite of the present invention will be explained. The molded product produced in Example 1 was cut to prepare a small test piece (25×2511W: 10 shoes in thickness). After reactivating it by vacuum heating at 200° C., the change in water absorption rate over time was measured in a constant temperature and humidity chamber at a temperature of 25° C. and an atmosphere of relative humidity (R, H,) of 90%. Under this test condition, 1
It was found that the water absorption rate was 10.34% after 8 hours, 12.08% after 28 hours, and almost saturated after 42 hours. From the water absorption curve shown in FIG. 1, it is clear that the zeolite molded article of the present invention has excellent hygroscopicity. A dehumidification test was carried out using a specimen completely saturated with water at 25°C, R, H, -90%.
, R, H, -47%, it was confirmed that the moisture in the specimen was desorbed favorably. From the above tests, it is clear that the zeolite molded article of the present invention has an antibacterial and antifungal effect as well as an anticondensation effect.

Next, the zeolite molded article of the present invention having antibacterial and antifungal functions was subjected to a durability test under severe conditions. Molded bodies obtained in Example 1 and Example 3 (50×50s: thickness 1
ON! i) and these two types of specimens were immersed in water to saturate the water and then immersed in liquid nitrogen (-195.8°C) for about 8 minutes to reach the liquid nitrogen temperature mentioned above. After that, these subjects were removed. No abnormalities such as cracks or damage were observed in any of the specimens.

Subsequently, these specimens were placed in water. No cracks or cracks were observed in any of the specimens placed in water. The test substance put into the water was roughly 90'~
When the product was placed in boiling water at 95°C and subjected to a visual inspection, no abnormalities were observed. Next, the specimens that had completed the above test were dried at ~110°C, and then visually inspected and tested using an electron microscope. No abnormalities were observed in any of the specimens. Example 1 The shrinkage percentages of the molded bodies obtained in Steps 3 and 3 at liquid nitrogen temperature were all 0.5% or less.The above durability test showed that the zeolide molded bodies of the present invention had good heat resistance, water resistance, and cold resistance. It is clear that the properties are extremely excellent.The above characteristics are noteworthy features of the present invention.

The characteristics of the zeolite molded article of the present invention are summarized below.

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

(b) In addition to antibacterial and antifungal properties, the zeolite molded article of the present invention has excellent moisture absorption and dehumidification properties. Moisture absorption and dehumidification occur reversibly depending on the humidity of the atmosphere.

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

(C) This molded product is strongly bonded with heat-fusible fibers, so it has extremely high strength, and cracks, flakes, cracks, etc. will occur during use, as seen in normal zeolite molded products. No phenomenon is observed.

(d) The processing temperature for obtaining the molded article of the present invention is lower than that for ordinary zeolite molding, preferably 300°C or less, and the present invention has extremely economical antibacterial, antifungal, and anticondensation functions. It is possible to produce the molded article of the invention.

(e) The bending fracture strength of the molded product is controlled by the molding pressure, the amount of heat-fusible fiber added, and other factors, but generally a molded product with extremely high strength and elasticity can be obtained. It will be done.

(``) The water resistance of this zeolite molded body is high.

The bending fracture strength of the zeolite molded body that is immersed in water to saturate it with moisture and then dried shows the same value as the one at the time of manufacture. In addition, no phenomena such as cracking, powdering, or cracking were observed during the process of immersing the molded body in water to achieve saturated adsorption.

Further, at this time, the elution of the zeolite components and antibacterial metals constituting the molded body into the water is extremely slight and can be ignored. Roughly, the molded product has little swelling property, and its length elongation when saturated with water is 0.5% or less.

(g) The molded article of the present invention is structurally stable over a high temperature range of 300°C to a low temperature range. The molded body is very stable at liquid nitrogen temperature, and the shrinkage rate of the molded body is only 0.5% or less.

(h) The molded article of the present invention is excellent not only in antibacterial, antifungal, and anticondensation functions, but also in heat insulation and soundproofing properties.

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

[Brief explanation of the drawing]

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

Claims (1)

[Scope of Claims] 1. A zeolite molded article having antibacterial and antifungal functions, which contains zeolite powder holding metal ions having a bactericidal effect and heat-fusible fibers, which are fusion-bonded. 2. The zeolite molded article according to claim 1, further comprising a binder. 3. The zeolite molded article according to claim 1 or 2, further comprising a nonflammable or flame-retardant filler and/or a lightweight material. 4. The zeolite molded article according to any one of claims 1 to 3, wherein the heat-fusible fiber has a softening point of 300°C or less. 5. The zeolite molded article according to any one of claims 1 to 4, wherein the heat-fusible fiber is a polyester fiber. 6. The zeolite molded article according to any one of claims 1 to 5, which contains zeolite that does not hold metal ions that have a bactericidal effect as well as zeolite that holds metal ions that have a bactericidal effect. 7. The zeolite molded article according to any one of claims 1 to 6, which contains 3 to 65% by weight of heat-fusible fibers based on the total weight of the zeolite (anhydrous basis). 8. The zeolite molded article according to any one of claims 1 to 7, which contains a binder in an amount of 3 to 35% by weight based on the total weight of the zeolite (anhydrous basis). 9. Claim 1, wherein the metal ion having a bactericidal effect is one or more metal ions selected from the group consisting of silver, copper, zinc, mercury, tin, lead, bismuth, cadmium, and chromium. The zeolite molded article according to any one of items 1 to 8. 10. The zeolite powder holding metal ions having a bactericidal effect and heat-fusible fibers are mixed together, and then the above mixture is pressure-molded at a temperature equal to or higher than the softening point of the heat-fusible fibers. A method for producing a zeolite molded body. 11. The method for producing a zeolite molded body according to claim 10, which further comprises mixing a binder in addition to the zeolite powder holding metal ions having a bactericidal effect and heat-fusible fibers. 12. Claim 10 or 11 further incorporating non-flammable or flame-retardant fillers and/or lightweight materials
The method described in section. 13. The method according to any one of claims 10 to 12, wherein 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. 14. The method according to any one of claims 10 to 13, wherein the heat-fusible fiber is a polyester fiber. 15. The method according to any one of claims 10 to 14, further comprising incorporating zeolite that does not retain metal ions having a bactericidal effect. 16, 3 to 65 based on the total weight of zeolite (anhydrous standard)
Claims 10 to 1 containing % by weight of heat-fusible fibers
The method according to any one of clauses 5. 17, 3 to 35 based on the total weight of zeolite (anhydrous standard)
17. A method according to any one of claims 10 to 16, comprising % by weight of binder.