JP2928269B2 - Mold and antibacterial cosmetic sheet - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a fungicide / antibacterial decorative sheet used for finishing walls of buildings and the like.

[Conventional technology]

2. Description of the Related Art Conventionally, there is a fungicide / antibacterial decorative sheet obtained by adding various fungicide / antibacterial agents, for example, an arsenic-based agent or the like to vinyl chloride (hereinafter abbreviated as PVC) / sol. However, such a conventional anti-fungal / antibacterial decorative sheet has a dehydrochlorination reaction of PVC, an effect of delaying foaming when heat is applied during the foaming molding of PVC in the manufacturing process or by heating for embossing. Has the disadvantage that the antibacterial agent tends to be discolored and the antibacterial activity is insufficient, and that the antifungal and antibacterial agent bleeds on the surface of the PVC layer and the durability of the antifungal and antibacterial activity is lost. Was.

[Problems to be solved by the invention]

An object of the present invention is to provide a fungicide / antibacterial decorative sheet used for finishing walls of buildings, etc., which solves the above-mentioned drawbacks of the conventional ones, does not easily promote the dehydrochlorination reaction of PVC, and has no foaming delay effect. An antibacterial agent was discovered, and the use of such a fungicide / antibacterial agent further reliably prevented discoloration during heating, and prevented the bleeding of the fungicide / antibacterial agent onto the surface of the PVC layer, thereby maintaining the fungicide / antibacterial power. An object of the present invention is to provide a fungicidal and antibacterial cosmetic sheet having a property.

[Means for solving the problem]

The present invention provides N-type antifungal and antibacterial
A vinyl chloride paste sol containing fluorodichloromethyl-phthalimide, in which a metal chelator was added to a vinyl chloride paste sol containing a strong plasticizer as a part of a plasticizer, and a foamed resin layer formed by foaming was provided. A fungicidal and antibacterial cosmetic sheet characterized by the following.

As the substrate, there are paper, nonwoven fabric, cloth and the like, but it is preferable to use a backing paper for wallpaper.

N-fluorodichloromethyl-phthalimide (Priventol A-3 (Bayer)) as a fungicide / antibacterial agent is suitable because it does not easily promote the dehydrochlorination reaction of PVC and has no foam delay effect. Preventol A-
3 is mixed in 2 parts or more.

The metal chelator is desirably a Zn chelator, for example,
Add at least 1 part of EC-14 (ADEKA ARGAS), and add 2 to 3 parts if the subsequent thermoforming conditions are severe. As a plasticizer to be blended in the foamed resin, there are dioctyl phthalate, dimethyl phthalate, chlorinated paraffin and the like, and DOP (dioctyl phthalate) is mainly used. Examples of the plasticizer having a strong polarity include DBP (dibutyl phthalate) and BBP (butyl benzyl phthalate), and BBP (butyl benzyl phthalate) is particularly preferable.

The polyvinyl chloride paste resin, filler (CaCO ₃ ), coloring agent, foaming agent, and heat stabilizer are not particularly limited, and those commonly used conventionally may be appropriately selected and used.

A wallpaper backing paper is coated with a PVC paste sol at a predetermined concentration and gelled. As the coating method, comma direct method, gravure direct method,
There are a gravure reverse method and a reverse roll coat method. The gelation temperature may be about 160 to 200 ° C., depending on the coating speed. Coating thickness is usually 15
0-180μ.

The decorative sheet base fabric produced as described above is left as it is, or after being subjected to printing or the like as appropriate, and then subjected to foaming and embossing to complete a mold-proof / antibacterial decorative sheet.

The antifungal / antibacterial decorative sheet manufactured as described in detail below as an example of the present invention, and a decorative sheet sample containing no antibacterial agent, compare their antifungal / antibacterial activity as follows. It is. The measurement conditions are as follows, except that the decorative sheet manufactured by the method of the later-described example of the present invention and the cosmetic sheet manufactured in the same manner as the method of the later-described example except that the antibacterial agent is not included, each having the PVC surface facing up. Place on a heart infusion agar medium, Escherichia coli, Staphylococcus aureus, Pseudomonas aeruginosa, and uniformly spray each bacterial solution of black mold,
When cultured in a thermostat at 30 ° C. for 3 days, an area in which mold and fungi are not cultured is formed in a ring around a substance having fungicidal and antibacterial activity. This is called a stop zone. By measuring and comparing the width of the inhibition zone, it is possible to compare the antifungal and antibacterial activities. The measurement results are as follows.

From these results, it can be seen that the decorative sheet of the present invention has large antifungal and antibacterial properties.

Then, a metal chelator such as that of this invention, EC
Comparing the thermal stability between the one with -14 added and the one without EC-14, no discoloration was observed even under the heating conditions of 210 ° C and 180 seconds for this invention. On the other hand, when EC-14 was not added, the temperature was 210 ° C and 30 ° C.
Red discoloration was observed after heating for 2 seconds.

Further, a part of the plasticizer DOP described in Examples of the present invention is replaced with BBP which is a strong plasticizer,
Compare the durability of antifungal and antibacterial activities of OP alone. Measurement conditions are carbon arc fade.
By measuring the width of the inhibition zone against staphylococci after irradiation for 100 hours, the antifungal and antibacterial activities of the two are compared. As a result, a part of the DOP is
Was replaced with a stop band width of 4 mm.
The single system was only 1 mm. From these results, it can be seen that by replacing a part of the plasticizer with a strong polarizer such as that of the present invention, the durability of the antifungal and antibacterial activities has been dramatically improved.

Then, N-fluorodichloromethyl-phthalimide (trade name: Preventol A-3 (Bayer)) as a fungicide / antibacterial agent as in the present invention and another fungicide / antibacterial agent 10-10 'Oxybisphenoxyaluminin (trade name: Vinazine (Bentron)), 2-
When the thermal stability was compared with that using (4-thiazoyl) benzimidazole, 3 parts by weight of each of the above antifungal and antibacterial agents was added to the PVC paste of the example, and the same backing paper as in the example was used. When the coated and gelled raw material was heated in an atmosphere at 210 ° C. for 180 seconds, N-
No discoloration of vinyl chloride was observed in the case where the fluorodichloromethylphthalimide was added, but yellowish red discoloration was observed in the case where the other two types were added.

The result was obtained. From this fact, since Preventol A-3 hardly promotes the dehydrochlorination reaction of PVC and does not have a foaming delay effect, it is difficult to prevent mold and fungicide contained in PVC.
It turns out that it is more suitable as an antibacterial agent.

(Operation)

The antifungal / antibacterial decorative sheet of the present invention is characterized in that a metal chelator is compounded in a PVC paste sol, and a part of the compounded plasticizer is replaced with a strong polar one, thereby applying heat during foam molding and embossing. But it does not turn red,
Moreover, since there is no bleeding of the antibacterial agent onto the surface of the foam layer, the antifungal and antibacterial effects can be maintained for a long time.

〔Example〕

Examples of the antifungal / antibacterial decorative sheet of the present invention will be described in detail below.

First, prepare a PVC paste. The composition of the paste is as follows.

Parts by weight Vinyl chloride resin PSL-280 (Kanebuchi Chemical) 100 Filler Whiten H (Shiraishi Kogyo) 60 Colorant R-900 (DuPont) 20 Plasticizer DOP (Kyowa Hakko) 50 Strong polar plasticizer D-160 ( Mitsubishi Kasei Vinyl) (BB
P) 5 Antimicrobial agent Preventol A-3 (Bayern) 4 Stabilizer KF85A-5 (Kyodo Pharmaceutical) 2 Chelator EC-14 (Adeka Argus) 1 Thickener Mineral spirits A (Mobile) 10 Backing for flame retardant wallpaper paper 1 (WK-70NRD Kohjin, 70g / m ^2, 110
The above paste is coated with a comma direct coat to a thickness of 150 μm, heated to 180 ° C. and gelled to form a foamed layer 2 to obtain a base material 3 . Further, the base material 3 is embossed 4 to complete a decorative sheet. At this time, the fireproofing effect is also improved because a fire-resistant treated paper is used as the backing paper for the wallpaper.

〔The invention's effect〕

As described above, the antifungal / antibacterial decorative sheet of the present invention has a vinyl chloride / antibacterial agent,
Since a metal chelator is added to the paste sol and the foamed resin layer is formed by foaming, the metal chelator suppresses the dehydrochlorination reaction at the time of foaming of PVC and does not turn red.

In addition, by replacing part of the plasticizer in the paste paste sol mixed with mold and antibacterial agents with a strong polar plasticizer, bleeding of the mold and antibacterial agents onto the surface of the foamed resin layer is suppressed. The antimicrobial and antibacterial effects have been greatly improved in sustainability.

Further, the fungicide / antibacterial cosmetic sheet of the present invention can be obtained by selecting Priventol A-3 (Bayer) and N-fluorodichloromethyl-phthalimide as a fungicide / antibacterial agent. Bayer) did not easily promote the dehydrochlorination reaction of PVC and had no foaming delay effect, so that the discoloration due to the dehydrochlorination reaction could be suppressed more reliably.

As described above, the present invention has a good heat stability, no discoloration, a large antifungal and antibacterial activity by simple means,
In addition, the antifungal and antibacterial effects last for a long time. And it has a great effect that a fungicide / antibacterial sheet having a high design effect can be easily obtained.

The embossing can further improve the design feeling, and the use of a substrate subjected to a twist-resistant treatment can enhance the disaster prevention effect.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a mold / antibacterial decorative sheet, and FIG. 2 is a cross-sectional view of a mold / antibacterial decorative sheet obtained by embossing the sheet of FIG. 1. Backing paper for wallpaper 2. Foamed resin layer 3. Base fabric 4. Embossed part

Claims (1)

(57) [Claims] 1. A vinyl chloride paste sol in which N-fluorodichloromethyl-phthalimide is blended on the upper surface of a base material as a fungicide / antibacterial agent, wherein the vinyl chloride contains a strong polar plasticizer as a part of the plasticizer. -An anti-mold and anti-bacterial decorative sheet characterized in that a foam resin layer formed by adding a metal chelator to a paste sol and foam-forming is provided.