JPH0613020B2 - Antibacterial adhesive treatment mat - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an antibacterial and pressure-sensitive adhesive mat, and more particularly, it is characterized in that the pile surface of the mat is coated with an adhesive containing at least one antibacterial and antifungal agent. The present invention relates to an adhesive treatment mat for dust removal.

In the past, in hospitals, research laboratories, factories, various stores, offices, general residences, etc., dust or microorganisms adhering to these are prevented from adhering to the soles of pedestrians and being brought indoors. Therefore, dust removal mats are laid at the entrances and used.

This dust removing mat is roughly divided into two systems, one is called an adhesive mat and the other is called a pile mat. As the former adhesive mat, there are known ones in which vinyl chloride plastisol is formed into a sheet and gelled to give adhesiveness to the sheet itself, and one in which an adhesive film is adhered to a substrate. Uses the adhesiveness of the surface of the mat to move the dust adhering to the sole of the shoe to the side of the mat. This type of adhesive mat has excellent characteristics of removing dust adhering to the surface that comes into contact with it by simply stepping on it, but naturally adhesive force is generated between the mat and the sole, When walking, I cannot avoid the discomfort that the soles stick on the mat. Furthermore, the soles are curved rather than flat,
Since it has a recessed surface, dust and the like adhering to the recessed recess does not come into contact with the adhesive surface, and a satisfactory dust removal effect has not been achieved.

In addition, the latter dust removal mat has the advantage that the fiber pile part is in good contact not only with the flat part such as the shoe sole but also with the recessed part, and it is possible to remove dirt such as dust, but it retains the adhesion of dust. The disadvantage is that the force is generally low compared to adhesive mats.

Furthermore, these dust removal mats are also intended to have a sanitary effect of preventing microorganisms such as bacteria from entering the room along with dust, but the microorganisms trapped on the mat grow in the mat, which It must prevent re-transference that is reattached to the shoe sole and brought into the room.

Therefore, the object of the present invention is to reduce the tendency to sticky and sticky when stepped on the shoe sole, etc., and to be excellent in the feel and texture as a dustproof mat, and to effectively remove dust from the recessed portion of the shoe sole. The present invention is to provide an antibacterial adhesive treatment mat in which dust once adhered is retained without re-scattering and growth of microorganisms such as bacteria in the mat pile is effectively prevented. .

According to the present invention, it comprises a base fabric, tufted pile yarns on the base fabric, and an elastomeric backing layer applied to the back face of the base fabric, and the surface of each pile yarn comprises at least one antibacterial and antifungal agent. The pressure-sensitive adhesive containing is in the form of a thin layer or particles, and the pile surface coating amount on a solid content basis is 0.05 to 2 g / 10.
It is installed so as to be 0 cm ² , and at 20 ° C and 65 ± 5
Provided is an adhesive mat for dust removal, which has an adhesive area of 0.785 cm ² , a load of 2 kg, and a pulling speed of 2 cm / min in an environment of% RH, which is substantially zero g / cm ² .

The present invention will be described in detail below with reference to the accompanying drawings.

In FIG. 1 showing a cross-sectional structure of a pressure-sensitive adhesive mat for dust removal according to the present invention, pile threads 2 are tufted on a base cloth 1 and the tips thereof are cut and aligned to form a mat surface. A backing layer 3 is formed on the back surface of the base cloth 1, for example, by applying an elastomer latex or by adhering an elastomer sheet.

In FIG. 2 showing an enlarged layer of the pile yarn, an antibacterial / antifungal agent-containing pressure-sensitive adhesive 4 which will be described in detail later is provided on the surface of each pile yarn 3 in the form of a thin layer or particles. .

According to the present invention, when the pile surface of a mat is coated with an adhesive and used as a dust removing mat, it does not tend to sticky when stepped on the shoe sole or the like, and the dust adhered to the concave portion of the shoe sole or the like. The first feature is that it is possible to effectively remove the dust and the like, and further, the action and effect that the dust removal rate and the dust retention rate are significantly improved as compared with the normal pile mat.

The following example is for a commercially available adhesive mat 5 points, an adhesive film and an adhesive applied to the pile surface of the mat,
The result of having measured the adhesive force is shown.

Example 1. Commercially available vinyl chloride resin plastisol adhesive mats A and B
For, it was directly subjected to measurement. Regarding the commercially available disposable type adhesive sheets C, D and E, the sponge side of the double-sided adhesive tape with sponge was attached and fixed to an aluminum plate, and the adhesive strength was measured. Four types of commercially available acrylic pressure-sensitive adhesives and polyolefin-type pressure-sensitive adhesives (Attack polypropylene) were put in a petri dish, dried to form a film, and the film was conditioned, followed by measurement. Further, some of the above-mentioned acrylic pressure-sensitive adhesives were applied to a mat pile, dried and then measured.
The following was used as the base mat.

Base mat 1. Pile: BCF nylon (stitch 6 / inch, gauge 5/32, pile height 9 mm, basis weight 880 g / m ² cut pile) Base fabric: Polyester plain woven fabric (220 g / m ² ) Backing: NBR latex (1000 g / M ² ) (Solid content 46%) Base mat 2. Pile: crimped nylon 150 denier (Stitch 9.2 / inch, gauge 1/3, pile height 10m)
m, basis weight 606 g / m ² , cut pile) Base fabric: Polyester plain woven fabric Backing: Urethane Base mat 3 Pile: Nylon 350 denier (Stitch 9 / inch, gauge 5/32, pile height 5 mm, date 960 g / m ² , Cut pile) Base cloth: PP plain woven cloth + PP cotton tuft backing: NBR The amount of adhesive applied to the pile mat is 100 on the pile surface.
The solid content was 0.5 g of the adhesive per cm ² .

Adhesive force is measured under the environment of 20 ° C. and 65 + 5% RH using a circular adapter with a diameter of 10 mm and an adhesion area of 0.785 cm ^{2 and} a rheometer manufactured by Fudo Kogyo Co., Ltd., applying a load of 2 kg to the mat. After being pressed against the adhesive-treated surface of No. 1, the vertical peeling force was measured at a pulling speed of 2 cm / min.

The results obtained are shown in Table 1.

The above results show that any commercially available pressure-sensitive adhesive mat shows adhesiveness to the pressing surface to some extent, which is considered to be the cause of discomfort, whereas according to the present invention,
Even when using an adhesive that itself has a strong adhesive strength,
It can be seen that by applying this to the pile surface, the adhesion is brought to a low level where it cannot be measured, and a significant improvement in feel is brought about.

Example 2. Next, with respect to the above-mentioned commercially available pressure-sensitive adhesive mat and the pressure-sensitive adhesive-treated mat according to the present invention, the results of measuring the dust removing effect on dust adhering to the uneven surface are shown in Table 2 below.

As commercially available adhesive mats, A to E used in Table 1 above are used.
And L to O were used as the adhesive treatment mat according to the present invention.

The dust removal rate was measured as follows. That is, depth 3 per cm
Eight kinds of JIS Z8901 dust are applied uniformly on a rubber sheet with a size of 8 mm × 8 cm with a groove of mm by changing the application amount.
The contact is made at a pressure of 0 kg, then the rubber sheet is peeled off, and the amount of dust carried in (application amount) and the amount of dust collected on the adhesive surface are plotted in a graph.

Figures 3 and 4 of the accompanying drawings respectively show a commercially available adhesive mat B.
3 is a plot of the relationship between the amount of dust carried in (mg / 64 cm ² ) and the amount of dust collected (mg / 64 cm ² ) for the pressure-sensitive adhesive mat L according to the present invention. From the slope of the line in the plots of these drawings The results obtained are shown in Table 2 below.

From the results in Table 2 above, by applying an adhesive to the pile surface of the mat, it is possible to significantly improve the dust removal rate, that is, the amount of collected dust per amount of dust brought in, as compared with known adhesive mats. You will understand.

Example 3. Next, the relationship between the amount of the adhesive applied to the mat and the dust removal rate (%) was measured. As the mat, the above-mentioned base mats 1, 2 and 3 were used, and the acrylic pressure-sensitive adhesive II was applied at various coating amounts, and dried and conditioned. The dust removal rate of this pressure-sensitive adhesive mat was measured in the same manner as in Example 2 except that a flat rubber sheet was used as the dust coating rubber sheet instead of the uneven rubber sheet of Example 2.

The measurement results are shown in Table 3.

The above-mentioned results show the fact that the dust removal rate is remarkably improved by the application treatment of the adhesive as compared with the untreated Putmile.

Example 4. The dust holding amount was measured for the pressure-sensitive adhesive mat produced in Example 3. In other words, for various mats, 8 of JIS Z8901
The seed dust was applied sufficiently, and the excess dust was shaken off with a dust shaker, and the amount of dust retained in the pile was measured. For comparison, the same test was performed on the pressure-sensitive adhesive film formed of the acrylic pressure-sensitive adhesive II. The results are shown in Table 4.

The above results show that by applying an adhesive to the mat pile, the dust retention rate is significantly improved, and re-scattering of dust once trapped is effectively prevented.

As shown in Examples 1 to 4 above, by treating the pile surface of the mat with an adhesive, excellent dust removing effect and dust holding effect can be obtained without deteriorating the feel and texture when stepping on the pile surface of the mat. It can be seen that However, it has been found that treating the pile surface of the mat with an adhesive causes some problems, unlike a flat adhesive sheet or adhesive tape. That is, in the inner part of the mat pile, it is not affected by light, and it is difficult to contact with the outside air. Therefore, particularly in the case of the adhesive treatment mat, microorganisms such as bacteria and mold are likely to grow. .

According to the present invention, in the adhesive to be treated the pile surface of the mat, by containing an antibacterial and antifungal agent in advance,
It is possible to effectively suppress the growth of microorganisms inside or inside the pile fiber.

In order to impart antibacterial properties to the mat pile, a method of incorporating an antibacterial agent into the fibers constituting the pile itself and a method of treating the pile constituent fibers with the antibacterial agent are known. However, in the present invention, it is most effective to prevent the growth of microorganisms such as fungi by including an antibacterial agent in the pressure-sensitive adhesive for treating the mat pile. The reason for this is not exactly known, but it is considered that the antibacterial agent directly acts on the microorganisms collected by the adhesive and the scattering of microbial spores is prevented. Further, it is considered that the antibacterial agent is attached to the mat pile with the adhesive in a state where the specific surface area is extremely large. The fact that the treated mats of the present invention show a fairly large zone of inhibition against microorganisms, as will be shown in the examples below, may be said to be a contribution to this latter contribution.

The examples below show the excellent antimicrobial properties of the treated mats of the invention.

Example 5. 0.5 g of solid content per 100 cm ^{2 of} area is added to the pile surface of the above-mentioned base mat 1 by blending the above-mentioned acrylic adhesive with the antibacterial agent shown below on the basis of solid content in the amount shown in Table 5. Was applied and dried to produce an adhesive mat.

These mats were cut into a circle with a diameter of 2 cm, poured into a heart infusion agar medium, placed in the center of a petri dish raised to the same height, and subjected to an antibacterial test. Further, the antifungal test was conducted in the same manner except that the potato dextrose agar medium was used.

The antibacterial and antifungal agents used are as follows.

A. 2-Promo-2-nitropropane-1,3-diol, B.I. Diphenyl ether compound C.I. Nitrogen-containing sulfur compounds D. Organic nitrogen-sulfur-containing cyclic compound E. Organic bromine compound F. Dihaloalkyl allyl sulfone G.I. Phenoxyethanol H. A benzimidazole derivative, I. The results obtained are shown in Table 5. The number indicated by the symbol + indicates the width (mm) of the inhibition zone, and the symbol-indicates that the inhibition zone was not formed.

In the antibacterial test, I is St. aureus II and B. subtilis III is E. coli IV indicates Ps. aeruginosa, respectively.

The antifungal test was performed using Asp. Niger.

The number in parentheses of the antibacterial / antifungal agent indicates the compounding amount in the adhesive (% by weight per solid content of the adhesive).

In the present invention, as the pressure-sensitive adhesive, various known ones can be used. Adhesives of this type are generally natural rubber, recycled rubber, styrene-butadiene-based, SB
Block polymer type such as S or SIS, isoprene type, chloroprene type, acrylic-butadiene type, acrylic resin type, vinyl resin type, silicone resin type, polypropylene type, polyester type, etc. elastomer polymer, if necessary, polyterpene resin , Tackifiers such as gum rosin, rosin esters or rosin derivatives, oil-soluble phenolic resins, coumarone / indene resins, petroleum hydrocarbon resins; plasticizers or softeners such as mineral oil, liquid polybutene, liquid polyacrylate, lanolin; zinc; Fillers or pigments such as flower, titanium oxide, various clays, hydrated aluminum, calcium carbonate, various pigments; anti-aging agent for rubber,
It is composed of a composition containing an antiaging agent such as dithiocarbamate and a metal chelating agent. These adhesives are all usable for the purpose of the present invention, but from the viewpoint of durability of dust removal rate and dust retention rate, weather resistance, light resistance, oil resistance, aging resistance, etc. Ester) adhesives are particularly desirable.

As the shape of the pressure-sensitive adhesive, a solvent type, an emulsion type, a solventless type or a liquid curing type is used.

As the antibacterial / antifungal agent, any one known per se can be used. Of course, this antibacterial / antifungal agent must exhibit good dispersibility in the coating composition of the pressure-sensitive adhesive used and must not cause precipitation or separation. Antibacterial and antifungal agents include organic halogen compounds, organic sulfur compounds, organic arsenic compounds, organic boron compounds, organic metal compounds, nitro compounds, alcohols, phenols, chlorophenols, cyclic ethers, aldehydes known per se. , Ketones, carboxylic acids, esters or lactones, acid amides, carbamic acids or aminocarboxylic acids, nitrile compounds, amidines or guanidines,
Quaternary ammonium salt, pyridine, quinoline, acridine, diazine or triazine, pyrrole or imidazole derivative, oxazole or oxazine derivative, thioxane or thioxanthone, thiazole or thiadiazine, thiocyan or isothiocyane, thiourea or thiourea. From the semicarbazide, dithiocarbamate or thiuram disulfides, sulfides, sulfoxides, sulfones, sulfonic acids, sulfamides, phosphoric acid esters, thiophosphoric acid antibacterial and antifungal agents, which meet the above-mentioned conditions. You can use one.

Examples of suitable antibacterial and antifungal agents have already been given in Example 5, but the following may also be mentioned.

1,3-dicyano-3,4-dibromobutane, alkylpolyethylene polyaminocarboxylic acid, oxobenzylphenol, organic quinolinium compound, benzalkonium chloride, chlorhexidine digluconate, o-tridithiodicarbamate, 2-aminoethylalkylglycine, In the present invention, these antibacterial and antifungal agents can be used alone or in combination of two or more kinds, and the amount thereof is generally 0.05 to 50% by weight based on the solid matter of the adhesive.
It is particularly preferable to use it in an amount of 0.5 to 30% by weight.

As a pile mat for applying an adhesive containing an antibacterial / antifungal agent, a synthetic fiber such as crimped or uncrimped nylon fiber, acrylic fiber, vinylon fiber, polyester fiber, vinylidene chloride fiber, polyolefin fiber or vinylon fiber is used. Spun yarns, multifilament yarns, spun yarns of natural fibers such as cotton, and blended yarns thereof are used.

As the base fabric for tufting and fixing the pile system, a woven fabric or a non-woven fabric or a net of synthetic fibers such as polyester fibers having excellent dimensional stability is used. The pile length of the pile yarn is not particularly limited, but is generally 3 to 40 mm, especially 5 to 20.
Those in the mm range are desirable.

Elastomers used for backing include acrylonitrile-butadiene rubber (NBR), styrene-butadiene rubber (SBR), synthetic rubber such as chloroprene, soft vinyl chloride resin, polyurethane, acrylic elastomer, styrene-butadiene. Examples thereof include thermoplastic resin elastomers such as block copolymer elastomers. These elastomers are applied to the back surface of the mat base fabric in the form of latex, dried, and cured if necessary to form a backing layer. When it is desired to make the backing layer thicker, the backing layer provided in the form of terax and the unvulcanized rubber sheet are superposed, and vulcanization and adhesion are performed under pressure and heating to form a thick backing layer. .

The pressure-sensitive adhesive is applied to the pile layer by a method known per se such as spray coating, brush coating, roller coating and blade coating. The amount of the adhesive applied to the pile layer is, as shown in the above-mentioned examples, 0.05 to 2 g / 100 cm ² per pile layer area, particularly 0.2 to 1 based on the solid content of the adhesive.
It is better to provide the amount of g / 100 cm ² .

After applying the adhesive, the pile layer is dried and, if necessary, cured to obtain the product of the present invention.

[Brief description of drawings]

FIG. 1 is a sectional view showing a sectional structure of an adhesive mat for dust removal according to the present invention, FIG. 2 is a partially enlarged sectional view showing an enlarged pile yarn of FIG. 1, and FIGS. 3 and 4 are examples. 5 is a graph showing the relationship between the amount of dust carried in and the amount of dust collected for the adhesive mat B and the adhesive treatment mat L in No. 2.

Continuation of the front page (72) Inventor Mako Matsuda 1-7-5 Nanko East, Suminoe-ku, Osaka City, Osaka Prefecture (56) References

Claims (2)

[Claims] 1. A base fabric, a pile yarn tufted on the base fabric, and an elastomer backing layer provided on the back face of the base fabric, and each pile yarn has at least one antibacterial and antifungal agent on the surface thereof. The pressure-sensitive adhesive contained is in the form of a thin layer or particles, and the pile surface coating amount based on the solid content is 0.05 to 2 g / 100 cm.
^Provided to be ² and at 20 ° C and 65 ± 5% R
An adhesive mat for dust removal, which has an adhesive area of 0.785 cm ² , a load of 2 kg, and a pulling speed of 2 cm / min under an environment of H and has an adhesive force of substantially zero g / cm ² . 2. The mat according to claim 1, wherein the adhesive is an acrylic adhesive.