JPH0812804A - Hygroscopic sanitary sheet - Google Patents

Abstract

PURPOSE:To obtain a sheet useful for forming a pleasant living space, having excellent water vapor absorption and adsorbing and deodorizing properties of an offensive smell of an ammonia gas and a hydrogen sulfide gas by blending a plastic sheet with a specific amount of a zeolite. CONSTITUTION:(A) The whole surface or part of a main body of a single substance of a plastic sheet (e.g. a sheet made of a PVC resin blended with a polymer plasticizer having >=1,000 molecular weight) or a laminate obtained by laminating the sheet to another material is blended with (B) 20-200 pts.wt. of a zeolite (e.g. silver zeolite or copper zeolite having antimicrobial and antimycotic action besides water vapor absorption and adsorbing and deodorizing properties) to give the objective sheet. The objective film is preferably blended with (C) an antimicrobial and mildewproofing agent such as 2,3,5,6- tetrachloro-4-(methylsulfonyl)pyridine or N,N-dimethyl-(N'- fluorodichloromethylthio)-N'-phenylsulfamide.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a functional sheet in which a plastic sheet is provided with hygroscopicity, antibacterial and antifungal properties and deodorant properties, and various unpleasant factors such as indoor air and bad odor are caused. The present invention relates to a highly useful seat that is removed and provides a comfortable living space.

[0002]

2. Description of the Related Art Plastic sheets are used in various fields because of their excellent durability and ease of handling.
For example, there are a variety of rooftop roofing sheets, water-blocking sheets, tent fabrics, etc., but recently they have begun to become popular for interior decoration. However, due to its good airtightness, indoors and outdoors have a temperature difference during the winter or during the rainy season, the room is filled with moisture, causing phenomena such as dew condensation, which is also a major drawback such as promoting the growth of mold. It was

In order to improve this, a water-absorbent resin such as polyvinyl alcohol is blended with plastic.

[0004]

However, the water-absorbent resin expands in volume with absorption of moisture and pops out from the sheet surface, or the water-absorbent resin once absorbs moisture and expands, and then does not release the moisture. The slimy feeling continued forever.

Further, since it is kneaded into the sheet, only the one exposed on the surface is effective, and the resin trapped inside is not useful at all.

The present invention provides a hygroscopic sheet that solves these drawbacks.

Zeolite has a very strong hygroscopic effect as it is, but attention was paid to the fact that the plastic compounded with it also retains this performance, and as a result of various studies, the present invention has been completed.

[0008]

[Means for Solving the Problems] 20 to 200 parts of zeolite, which is a moisture absorbing material, is mixed with a plastic sheet to absorb moisture.

As a result of the test, it was found that the one containing this zeolite has an effect of adsorbing and deodorizing ammonia gas and hydrogen sulfide gas, which are particularly bad odors in daily life odor, as an effect different from hygroscopicity. . That is, when set on the wall surface of a house or the like, it absorbs moisture to prevent dew condensation and deodorizes, thereby providing a comfortable living space.

In this case, the larger the surface area is, the more effective it is. Therefore, it is needless to say that the effect is further enhanced by engraving a groove on the surface of the sheet to give a design, and the appearance is further improved.

If silver zeolite or copper zeolite is used in place of this zeolite, it becomes a hygienic sheet having not only a moisture absorption and deodorizing function but also an antibacterial and antifungal action.

Further, by adding a commercially available antibacterial and antifungal agent to a mixture of zeolite instead of using silver zeolite or copper zeolite, a sheet having a more effective antibacterial and antifungal action was obtained.

[0013]

Since the sheet of the present invention has a highly hygroscopic zeolite incorporated therein, if it is installed on a wall surface in a place where it is desired to avoid high humidity, such as in a house, it absorbs the moisture generated from the room. It also has a humidity control function that prevents the condensation of water, and also releases the absorbed moisture when the humidity is low, so that it always maintains a comfortable humidity, and its effect is semipermanent. followed by.

By absorbing moisture, moisture in carpets and tatami mats in homes and the like is also reduced to prevent the formation of mold, and to suppress the growth of mites such as mites that breed using it as food. It also helps prevent allergic diseases.

Further, of the odors from the human body, which are said to be living odors, and the odors emitted from foods, furniture, etc., ammonia odors and hydrogen sulfide odors, which are particularly offensive odors, are adsorbed and deodorized, so that a comfortable living space can be realized. .

Further, by using silver zeolite or copper zeolite, or by adding the above-mentioned antibacterial and antifungal agent, it is a sheet which can realize a more hygienic environment without generation of germs and molds. Can be something.

[0017]

The drawings show an embodiment of a hygroscopic hygiene sheet according to the present invention. Fig. 1 is a single material sheet containing 20 to 200 parts of zeolite, Fig. 2 is a laminate with another material, and Fig. 2-1 is A sheet containing 20 to 200 parts of zeolite, Fig. 2-2 is a base fabric, Fig. 2-3 is a sheet of another material, Fig. 3 is a cross-sectional view of Fig. 2, and Fig. 4 is a single material with an uneven design. Sheet,
FIG. 5 is a sectional view thereof.

The plastic used as the material for this sheet is a thermoplastic, and examples of the thermoplastic include polyvinyl chloride, polystyrene, polyethylene, polypropylene, acrylic, polyvinyl butyrate, polyvinyl alcohol, polyvinyl acetate, polyvinyl formal, and polychlorinated. Vinylidene, ethylene vinyl acetate copolymer, polyurethane, fluororesin, cellulosic resin, nylon and the like can be used regardless of the material as long as they can be molded by mixing 20 to 200 parts of zeolite, but the molecular weight is 10
50 to 15 polyester-based polymerization plasticizers of 00 or more
Polyvinyl chloride with 0 parts added is particularly desirable.

Polyvinyl chloride is easy to process,
The hardness can be freely adjusted by the amount of plasticizer compounded, and the action of chemicals such as stabilizers, UV absorbers, and colorants enables completely transparent and free coloring with excellent weather resistance, and self-extinguishing property. It also has features such as having.

However, in order to impart hygroscopicity to this polyvinyl chloride sheet, a plasticizer having a low molecular weight cannot cover the fine pores of the zeolite crystals and thus cannot exhibit its performance. Therefore, a polymerization type plasticizer having a molecular weight of 1,000 or more is used. Must be blended.

Further, in the case of the laminated sheet of FIG. 2, all layers may be used, but zeolite may be mixed only in the layer to be the inner layer.

The hygroscopicity is greatly influenced by the blending amount. The hygroscopicity is greatly affected by the blending amount. When the content is 20 parts or less, the hygroscopic performance becomes weak in practice, and when the content is 200 parts or more, the physical strength of the blended plastic is limited. This is because it becomes unpractical because it becomes weak and the viscosity at the time of molding becomes high and the moldability deteriorates. Preferably, if it is in the range of 50 to 150 parts, the balance between hygroscopicity, physical strength and moldability will be good.

Further, the above-mentioned silver zeolite or copper zeolite is not used, but the zeolite is used as it is, and a commercially available antibacterial / antifungal agent 2.3.5.6-tetrachloro-4- is used.
(Methylsulfonyl) pyridine, N.I. N-dimethyl-
(N'-fluorodichloromethylthio) -N'-phenylsulfamide, 2- (4-thiazolyl) -benzimidazole, 10.10'-oxybisphenoxyarsine, 2-dicarboximide, 2.3.5 Strong if at least one of 6-tetrachloro-1.3-isophthalonitrile, N-fluorodichloromethylthiophthalimide, N- (trichloromethylthio) -4-diclohexene-1 and tetramethylthiuram disulfide is added adversarially. A sheet having both antibacterial and antifungal properties can be obtained.

Further, by adding a flame retardant such as antimony trioxide, antimony pentoxide, sodium antimonate, aluminum hydroxide, zinc borate, tris (chloroethyl) phosphate, tris (monochloropropyl) phosphate, fire resistance and flame resistance can be improved. An excellent safe seat is obtained.

Next, production examples and test results are shown.

Production Example 1 The polyvinyl chloride compounds shown in Table 1 were rolled by calendering to obtain the sheet shown in FIG. Cut this sheet to a specified size, attach it to the inner wall of a cubic case that can be sealed, place a container with water in the center of the case, seal it, measure the humidity change in the container for 5 hours using a sensor, and increase the humidity Was compared with Comparative Example 1-1.

Further thereafter, the low molecular weight plasticizer DOP
The composition using (Molecular weight 391) was used as Comparative Example 1-2, and the same measurement was performed to compare with Example 1 and Comparative Example 1-1.

For the adsorption and deodorization of a bad odor, ammonia gas is used and the Tedlar back method (sample size: 10 × 1) is used.
0 cm, capacity: 1000 cc, test time: 2 hours, measuring instrument: gas detector tube, blank gas concentration 10 after 2 hours
00 ppm).

As a result, as shown in Tables 1 and 2, Comparative Example 1
It was found that the sheet has a larger hygroscopic force and an ammonia deodorizing ability than -1.

Comparative Example 1 using a low molecular weight plasticizer DOP instead of the polystyrene resin having a large molecular weight
In No. 2, the moisture absorption performance of the zeolite was not observed, and it was found that the effect could not be obtained with the low-molecular weight plasticizer, which is not much different from Comparative Example 1-1.

[0031]

[Table 1]

[0032]

[Table 2]

Production Example 2 Polyvinyl chloride compound shown in Table 3 was molded by a calender, and a base fabric (nylon taffeta) preliminarily adhered and a polyvinyl chloride compound containing no zeolite on the opposite side centered on the base fabric. The sheet formed by calendering was pressed with a laminator to obtain a laminated sheet as shown in FIG.

For this, the same moisture absorption test as in Example 1,
Antibacterial and antifungal tests and flame retardancy tests were conducted.

The test method for the antibacterial and antifungal method was the halo method. Staphylococcus aureus was used for the antibacterial test as the test bacteria, and blue mold was used for the antifungal test. As a result, as shown in Tables 3 and 4, it was a sheet having excellent hygroscopicity, antibacterial and antifungal properties, and excellent flame retardancy.

[0036]

[Table 3]

[0037]

[Table 4]

[0038]

EFFECTS OF THE INVENTION Since the present invention has the constitution as described above, it is possible to provide a safe and hygienic plastic sheet having a hygroscopic effect, an antibacterial and antifungal effect, and a deodorant property and a flame retardant property.

[Brief description of drawings]

[Figure 1] Single material sheet overview

[Fig. 2] Overview of laminated sheets

3 is an enlarged cross-sectional view of FIG.

[Fig. 4] Outline view of the seat with design

5 is an enlarged cross-sectional view of FIG.

[Explanation of symbols]

 1 Zeolite blended sheet 2 Base cloth 3 Zeolite-free sheet

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Office reference number FI technical display location C08L 101/00

Claims (5)

[Claims] 1. A sheet made of a single substance or a plastic sheet laminated with another material, wherein zeolite is compounded in the whole or a part of the main body in an amount of 20 to 200 parts. 2. The sheet according to claim 1, wherein a design is provided on the entire surface or a part thereof. 3. A sheet containing 20 to 200 parts of a mixture of silver zeolite and copper zeolite, alone or in combination, in place of the zeolite in claims 1 and 2. 4. The method according to claims 1 and 2, 2.3.5.6-
Tetrachloro-4- (methylsulfonyl) pyridine,
N. N-dimethyl- (N'-fluorodichloromethylthio) -N'-phenylsulfamide, 2- (4-thiazolyl) -benzimidazole, 10.10'-oxybisphenoxyarsine, 2-dicarboximide, 2 ．
3.5.6-Tetrachloro-1.3-isophthalonitrile, N-fluorodichloromethylthiophthalimide, N
-(Trichloromethylthio) -4-dichlorohexene-1
And a sheet containing one or more kinds of antibacterial and antifungal agents selected from tetramethylthiuram disulphide. 5. The sheet according to claim 1, wherein the plastic is polyvinyl chloride resin mixed with a polymer plasticizer having a molecular weight of 1000 or more.