JP6993810B2 - Wet wipes - Google Patents

Description

The present invention relates to a wet tissue having excellent sterilizing properties, inconspicuous wiping marks after wiping, and less likely to deteriorate members such as acrylic to be wiped.

Generally, a wet tissue in which a non-woven fabric or the like is impregnated with a chemical solution is used for removing hand stains and germs and cleaning various instruments, and various studies have been made on the wet tissue (for example, Patent Document 1 and Patent Document 1 and). Patent Document 2).

Japanese Unexamined Patent Publication No. 2014-70044 Japanese Unexamined Patent Publication No. 2006-35002

Here, wet tissues (also referred to as wet wipers, wet wipers, etc.) that have been imparted with sterilizing properties by an impregnated chemical solution are widely used, and in conventional wet tissues, the water content in the chemical solution is removed. There was a problem that the wiping marks were conspicuous due to the components of the chemical solution remaining on the surface after evaporation. Especially in the medical field, when wiping the cover of a medical incubator made of transparent acrylic resin etc. with a wet tissue, if the chemical solution dries slowly or if the above wiping marks are conspicuous, it is for medical use. There was a problem that it became difficult to understand the complexion and physical condition of the newborn baby in the incubator, and nurses and others had to wipe it dry with a dry cloth to remove the wiping marks.

Further, as a wet tissue which dries quickly after wiping, the wiping mark is not conspicuous, and the sterilizing property is imparted, for example, a wet tissue containing about 70% by volume to 80% by volume of ethanol can be mentioned. Due to the large amount, there is a problem that a member such as acrylic used for medical equipment causes weight change, surface whitening, surface curvature, surface dissolution, decrease in hardness and the like, and cannot withstand the use of wet tissue.

Therefore, the present invention has been made in view of the above problems, and is excellent in sterilizing property, the wiping mark is not conspicuous even if it is dried after wiping, and the wet material such as acrylic to be wiped is not deteriorated. The purpose is to provide a tissue.

In view of the above problems, the inventors of the present invention have conducted diligent research. As a result, it is possible to solve the above-mentioned problems by using a wet spunlace non-woven fabric having at least a fiber derived from a split type composite fiber as the non-woven fabric and adjusting the type of the chemical to be used and the impregnation amount of the non-woven fabric with the non-woven fabric. The headline has led to the completion of the present invention. Specifically, the present invention provides the following.

(1) The first aspect of the present invention is a wet tissue in which a nonwoven fabric is impregnated with a chemical solution, wherein the nonwoven fabric is a wet spunlaced nonwoven fabric, and the nonwoven fabric has at least a fiber derived from a split type composite fiber. However, the chemical solution contains benzalkonium chloride, hexadecyltrimethylammonium chloride, 4-chloro-3,5-dimethylphenol, and is impregnated in 100 parts by mass of the nonwoven fabric with 120 parts by mass or more 140. It is a wet tissue having a mass or less and a sterilization activity value of 2.0 or more for Escherichia coli and 2.0 or more for Benzalkonium chloride.

(2) The second aspect of the present invention is the wet tissue according to (1), which is a member to be wiped, such as acrylic resin, ABS resin, PA resin, polyethylene terephthalate resin, and polyvinyl chloride. When the resin and polyacetal resin are immersed in the chemical solution and ion-exchanged water for 24 hours under the condition of liquid temperature of 45 ° C., the weight change rate when immersed in the chemical solution and the ion-exchanged water is measured. However, the difference between the weight change rate when immersed in the chemical solution and the weight change rate when immersed in ion-exchanged water is 2.0 points or less.

(3) The third aspect of the present invention is the wet tissue according to (1) or (2), wherein the nonwoven fabric has ultrafine fibers and is derived from the split-type composite fibers in the nonwoven fabric. The total amount of the ultrafine fibers is 50% by mass or more and 90% by mass or less, and the content of the fibers derived from the split type composite fiber in the nonwoven fabric is 25% by mass or more. Is.

(4) The fourth aspect of the present invention is the wet tissue according to any one of (1) to (3), wherein the content of benzalkonium chloride in the drug solution is 1.0 × 10 ⁻ . ¹ % by mass or more and 2.0 × 10 ^-1 % by mass or less, hexadecyltrimethylammonium chloride content of 1.0 × 10 ⁻² mass% or more and 5.0 × 10 ⁻² mass% or less, 4-chloro-3 , 5-Dimethylphenol is characterized by having a content of 3.0 × 10 ^-3 % by mass or more and 2.0 × 10 ⁻² % by mass or less.

(5) The fifth aspect of the present invention is the wet tissue according to any one of (1) to (4), wherein the chemical solution does not contain more than 1.0 × 10% by mass of ethanol. It is a feature.

(6) The sixth aspect of the present invention is the wet tissue according to any one of (1) to (5), wherein the chemical solution is 2.0% by mass or more and 1.0 × 10% by mass or less. It is characterized by containing propylene glycol and methyl propylene glycol of 5.0 × 10 ^-1 % by mass or more and 8.0% by mass or less.

The nonwoven fabric used for the wet tissue of the present invention is a wet spunlaced nonwoven fabric and has at least fibers derived from split type composite fibers. As described above, the non-woven fabric has fibers having a small fineness formed by dividing the split-type composite fibers in the process of manufacturing the non-woven fabric, so that the size of the droplets when wiped can be made fine. It is possible to make the wiping marks after wiping inconspicuous. Further, regarding the chemical solution for impregnating the non-woven fabric, benzalkonium chloride, hexadecyltrimethylammonium chloride, and 4-chloro-3,5-dimethylphenol are used in combination. Therefore, even if the content of ethanol is suppressed, the sterilizing property can be ensured, the wiping marks can be made inconspicuous, and the acrylic and other members to be wiped are less likely to be deteriorated. Can be done.

Hereinafter, embodiments for carrying out the present invention will be described in detail.

<Wet wipes>
The wet tissue of the present invention is a non-woven fabric impregnated with a predetermined chemical solution.

[Non-woven fabric]
As the non-woven fabric, raw materials selected from wood pulp fibers, natural fibers such as cotton, recycled fibers such as rayon, semi-synthetic fibers such as acetate, and synthetic fibers such as polyethylene, polypropylene, polyethylene terephthalate, and acrylic are used and wet. Wet spunlaced non-woven fabric manufactured by the spunlace method of. The type and ratio of each fiber used for the non-woven fabric may be appropriately selected according to the texture and mechanical strength required for the wet tissue. Here, in the dry spunlace non-woven fabric, an oil agent is generally added to the raw material fibers in order to improve the slip between the fibers in the card machine in the manufacturing process and prevent static electricity from being charged. It was one of the causes of the later wiping marks. Therefore, in the wet tissue of the present invention, a wet spunlace nonwoven fabric in which almost no oil remains in the manufacturing process is used.

The wet tissue of the present invention is used in a packaging container such as an airtight film-shaped encapsulation bag or a plastic container in a state where a large number of sheets (for example, about 10 to 100 sheets) are laminated after impregnating each non-woven fabric with a chemical solution. It is stored and made into a product. As the folding structure of the wet tissue, a pop-up type or non-pop-up type V-shaped, C-shaped, Z-shaped, or a further folded or deformed structure thereof can be adopted, but is limited to these. It's not something. The vertical and horizontal dimensions of the non-woven fabric sheet before folding are not particularly limited, but are preferably 100 mm or more and 600 mm or less. The basis weight of the nonwoven fabric is not particularly limited, but is preferably 20 g / m ^{2 or more and 60 g / m 2 or} less from the viewpoint of durability, ease of use, and cost.

(Fiber derived from split type composite fiber)
The nonwoven fabric which is a component of the present invention has at least a fiber derived from a split type composite fiber. Here, in the split type composite fiber, at least one of the constituents is divided into two or more in the fiber cross section, at least a part of the constituents is exposed on the fiber surface, and the exposed portion is the length of the fiber. Those having a known cross-sectional structure, which are continuously formed in the radial direction, are used. The split-type composite fiber is split by a high-pressure water stream or the like during the production of the non-woven fabric, and becomes a fiber having a lower fineness. Here, the fineness of the split-type composite fiber before splitting is preferably 0.8 dtex or more and 1.6 dtex or less. By adjusting the fineness of the split type composite fiber before splitting to the above range, the fiber diameter of the split fiber becomes moderately small, and the scraping property for removing stains is maintained while cleaning. The size of the droplets can be made fine, and the wiping marks after wiping can be made inconspicuous. The content of the fiber derived from the split type composite fiber is preferably 25% by mass or more from the viewpoint of scraping dirt, and preferably 25% by mass or more and 45% by mass or less from the viewpoint of cost.

As the combination of the polymer composition of the split type composite fiber, acrylic / diacetate, polyethylene terephthalate / polyethylene, polyethylene terephthalate / polypropylene, polypropylene / ethylene-vinyl alcohol copolymer, polyethylene terephthalate / nylon and the like can be used. .. Among these, it is preferable to use acrylic / diacetate, which has better water absorption and can make the wiping marks inconspicuous by making the droplets finer.

(Ultrafine fiber)
Further, the nonwoven fabric used for the wet tissue of the present invention may have ultrafine fibers having a fineness of 0.3 dtex or more and 0.5 dtex or less in addition to the fibers derived from the above-mentioned split type composite fiber. The ultrafine fibers alone are slightly inferior to the split type composite fibers in the scraping property for removing stains and the ability to make the wiping marks after wiping inconspicuous. By combining these, it is possible to reduce the cost while maintaining the scraping property of the split type composite fiber and the performance of making the wiping marks inconspicuous. As the ultrafine fiber, acrylic, nylon, polyester, polypropylene, polyethylene and the like can be used, but the fiber is not limited thereto. Among these, acrylic is preferable because it has excellent absorbability and is less likely to be discolored by ultraviolet rays or sunlight. When the ultrafine fiber is used, the total amount of the fiber derived from the split type composite fiber and the ultrafine fiber is preferably 50% by mass or more and 90% by mass or less, and more preferably 70% by mass or more and 90% by mass or less. .. By adjusting the total amount of fibers derived from the split type composite fiber and the ultrafine fibers as described above, it is possible to make the size of the droplets at the time of wiping fine while giving the non-woven fabric appropriate strength. , The wiping marks after wiping can also be made inconspicuous. Further, the total amount of the fibers derived from the split type composite fiber and the ultrafine fiber can be appropriately adjusted according to the blending amount of the heat-fused fiber described later.

(Heat fusion fiber)
Further, the nonwoven fabric used for the wet tissue of the present invention may have a sheath-core type heat-sealed fiber. By using the sheath-core type heat-sealed fiber, the tensile strength of the non-woven fabric can be increased, and it is possible to prevent the wet tissue from being torn when it is taken out or wiped. The sheath-core type heat-sealed fiber is not particularly limited, and examples thereof include a combination of polyesters having different melting points, polyethylene and polypropylene, polybutene and polypropylene, and polyethylene and polyethylene terephthalate. It is preferable to use a combination of different polyesters. The content of the heat-fused fiber in the non-woven fabric is preferably 10% by mass or more and 35% by mass or less, preferably 10% by mass or more and 20% by mass, from the viewpoint of the balance between the softness, strength, durability and cost of the wet tissue. % Or less is more preferable.

[Chemical solution]
In the wet tissue of the present invention, the chemical solution impregnated in the nonwoven fabric contains benzalkonium chloride, hexadecyltrimethylammonium chloride, and 4-chloro-3,5-dimethylphenol. After cleaning, even if the ethanol content is suppressed by using these three types of chemicals in the chemical solution, the wet tissue itself maintains the ability to prevent mold and bacteria from growing and the sterilizing property required for the wet tissue. It is possible to make the wiping marks inconspicuous, and further, it is possible to make it difficult for the members such as acrylic to be wiped to deteriorate.

It is more preferable that the nonwoven fabric is impregnated with a chemical solution of 120 parts by mass or more and 140 parts by mass or less per 100 parts by mass of the nonwoven fabric, and the impregnation amount of the chemical solution is 125 parts by mass or more and 135 parts by mass or less. By keeping the amount of the chemical solution within the above range, the non-woven fabric can exert a sufficient sterilizing and antiseptic effect, and excessive chemical solution is not applied to the target member at the time of cleaning. , Can be dried quickly after wiping.

(Benzalkonium chloride)
Benzalkonium chloride is a drug that mainly acts as a fungicide against bacteria. The content of benzalkonium chloride in the chemical solution is preferably 1.0 × 10 ^-1 % by mass or more and 2.0 × 10 ^-1 % by mass or less, and 1.2 × 10 ^-1 % by mass or more and 1.8. It is more preferably ^x10-1 % by mass or less. When the content of benzalkonium chloride is within the above range, it is possible to make the wiping marks after wiping inconspicuous while maintaining the sterilizing effect and the sterilizing effect of the wet tissue itself. ..

(Hexadecyltrimethylammonium chloride)
Hexadecyltrimethylammonium chloride is a drug that mainly acts as a fungicide against bacteria. The content of hexadecyltrimethylammonium chloride in the chemical solution is preferably 1.0 × 10 ⁻² mass% or more and 5.0 × 10 − ² mass% or less, and 1.5 × 10 − ² mass% or more. It is more preferably 0 × 10 ⁻² mass% or less. By keeping the content of hexadecyltrimethylammonium chloride within the above range, it is possible to make the wiping marks after wiping inconspicuous while maintaining good sterilizing effect and sterilizing effect of the wet tissue itself. can.

(4-Chloro-3,5-dimethylphenol)
4-Chloro-3,5-dimethylphenol is a drug that mainly acts as a fungicide against fungi. The content of 4-chloro-3,5-dimethylphenol in the chemical solution is preferably 3.0 × 10 ^-3 % by mass or more and 2.0 × 10 ⁻² % by mass or less, 4.0 × 10 ^-3 . More preferably, it is by mass% or more and 8.0 × 10 ^-3 mass% or less. When the content of 4-chloro-3,5-dimethylphenol is within the above range, the wiping marks after wiping can be left while maintaining good sterilization effect and antifungal effect of the wet tissue itself. It can be made inconspicuous.

(ethanol)
Ethanol may be contained in the chemical solution impregnated in the non-woven fabric. The higher the content of ethanol, the higher the effect as a fungicide against bacteria and the effect of suppressing the growth of fungi, the faster the drying after wiping, and the less noticeable the wiping marks, but on the other hand, it is the target of wiping. It is preferable that the chemical solution does not contain more than 1.0 × 10% by mass of ethanol because it may cause weight change, surface whitening, surface curvature, surface dissolution, hardness reduction and the like with respect to acrylic resin and the like.

(Methylpropylene glycol)
Methylpropylene glycol can also be contained in the chemical solution impregnated in the non-woven fabric. Methylpropylene glycol has the effect of suppressing the growth of fungi and can supplement the antiseptic performance of the wet tissue itself. In order to supplement the antiseptic performance, reduce the cost, and make the wiping marks after wiping inconspicuous, the content of methylpropylene glycol in the chemical solution should be 5.0 × 10 ^-1 % by mass or more and 8.0% by mass or less. When the drug solution contains ethanol, it is preferable to adjust the content of methylpropylene glycol in order to supplement the antiseptic performance according to the content of ethanol, and the drug solution is 5.0 ×. In the case of containing ^10-1 % by mass or more and 1.0 × 10% by mass or less of ethanol, it is preferable to contain 5.0 × ^10-1 % by mass or more and 8.0% by mass or less of methylpropylene glycol. When 5.0 × 10 ^-1 % by mass or more of ethanol is not contained, it is preferable to contain 3.0% by mass or more and 8.0% by mass or less of methylpropylene glycol.

(Propylene glycol)
Propylene glycol can also be contained in the chemical solution impregnated in the non-woven fabric. Propylene glycol mainly has a function of assisting the bactericidal effect of a bactericidal agent against bacteria and fungi, and its content is to make the wiping marks after wiping inconspicuous while maintaining the function. It is preferably 0% by mass or more and 1.0 × 10% by mass or less.

(Polyoxyethylene alkyl ether)
The chemical solution impregnated in the non-woven fabric may also contain polyoxyethylene alkyl ether. The polyoxyethylene alkyl ether mainly has an effect as a cleaning agent, and its content is preferably 0.05% by mass or more and 0.15% by mass or less. The polyoxyethylene alkyl ether may be replaced with another surfactant as long as it plays a role as a cleaning agent. However, in that case, it is necessary to appropriately select the type of surfactant and adjust the content so that the antiseptic performance and sterilization performance of the wet tissue are not hindered and the wiping marks after wiping are inconspicuous.

[Sterilization performance]
The wet tissue of the present invention has a sterilizing activity value of 2.0 or more for Escherichia coli and 2.0 or more for Staphylococcus aureus.

The measurement and calculation of the sterilization activity value is performed in accordance with "Test method for sterilization performance of wet wipers" edited by the Japan Sanitary Materials Industry Association (revised on November 16, 2015), and stainless steel. The plate is inoculated with bacteria together with appropriate stains, dried, wiped with a weight wrapped with a wet tissue a predetermined number of times, and allowed to stand for 5 minutes to inactivate the sterilizing active substance on the stainless steel plate. It is performed by measuring the viable cell count, and the sterilization activity value R is specifically obtained by the following formula.
R = AB
A; Average value of the common logarithm of the viable cell count as a result of three trials on the control sample B; Average value of the common logarithm of the viable cell count as a result of three trials on the test sample

<Manufacturing method of wet tissue>
The wet tissue of the present invention can be produced, for example, by the production method shown below. After impregnating each non-woven fabric with a chemical solution, a large number (for example, about 10 to 100) are laminated and stored in an airtight film-shaped encapsulation bag or a packaging container such as a plastic container. As the folding structure of the wet tissue, a pop-up type or non-pop-up type V-shaped, C-shaped, Z-shaped, or a further folded or deformed structure thereof can be adopted, but is limited to this. It's not something.

<Example 1>
Purified water 84.425% by mass, benzalconium chloride 1.5 × 10 ^-1 % by mass, ethanol 9.3% by mass, methyl propylene glycol 1.0% by mass, propylene glycol 5.0% by mass, hexadecyltrimethylammonium Chloride 2.0 × 10 ^-2 % by mass, 4-chloro-3,5-dimethylphenol 5.0 × 10 ^-3 % by mass, polyoxyethylene alkyl ether 1.0 × 10 ^-1 % by mass The total amount was 100% by mass. As the non-woven fabric, 35% by mass of fibers derived from acrylic / diacetate split type composite fibers, 44% by mass of acrylic fibers as ultrafine fibers, and 21% by mass of polyester fibers as sheath core type heat fusion fibers. A wet spunlaced non-woven fabric having a basis weight of 25 g / m ² was used. Next, after impregnating the non-woven fabric with the chemical solution, it was cut to have dimensions of 300 mm in length and 163 mm in width, and 50 sheets were laminated (folded in a Z shape and then folded in half) to be airtight. The wet tissue of Example 1 was obtained by storing it in a film-shaped encapsulation bag having a property. The mass part of the chemical solution impregnated in 100 parts by mass of the nonwoven fabric (impregnation ratio shown in Table 1) was 120 parts by mass in Example 1-A, 130 parts by mass in Example 1-B, and Example 1-. In C, it was adjusted to be 140 parts by mass. The fineness of the acrylic / diacetate split type composite fiber before division was 1.2 dtex, and the fineness of the acrylic fiber, which is an ultrafine fiber, was 0.4 dtex.

<Example 2>
Wet wipes were obtained in the same manner as in Example 1 except that the amount of each component added to the chemical solution was changed as shown in Table 1.

<Comparative Examples 1 to 15>
Each component of the chemical solution, its addition amount, and the composition of the non-woven fabric are changed as shown in Tables 2 to 6, and the basis weight of the nonwoven fabric used and the dimensions at the time of cutting the nonwoven fabric in the manufacturing process of the wet tissue are described below. Wet wipes were obtained in the same manner as in Example 1 except for the amount and dimensions. Regarding the basis weight, a non-woven fabric of 50 g / m ² was used in Comparative Example 1, 25 g / m ² in Comparative Examples 2 to 13, 24 g / m ² in Comparative Example 14, and 40 g / m ² in Comparative Example 15. .. Further, regarding the cutting dimensions of the nonwoven fabric after impregnating the nonwoven fabric with the chemical solution and before laminating 50 sheets, the nonwoven fabric was cut so as to be 300 mm in length and 186 mm in width in Comparative Example 1, and in Comparative Examples 2 to 15, it was vertically cut. It was cut so as to have a width of 300 mm and a width of 163 mm.

<Evaluation>
The wet tissues of Examples 1, 2 and Comparative Examples 1 to 15 were evaluated for their sterilizing performance with respect to wiping marks, Staphylococcus aureus and Escherichia coli, and the results are shown in Tables 1 to 6.

[Wipe marks]
The surface of the acrylic plate (95 mm x 150 mm) was wiped three times back and forth with one wet tissue of each example and each comparative example folded in four, and then wiped at a point 30 cm away from the acrylic plate. The presence or absence of traces was observed with the naked eye.

○: Wiping marks cannot be visually confirmed after drying ×: Wiping marks can be visually confirmed after drying

As can be seen from the results of Tables 1 to 6, the wet tissue of the present invention was excellent in sterilizing property, and the wiping marks after wiping were inconspicuous.

As described above, for Examples 1 and 2 in which the results were good, the following additional tests against mold and bacteria were carried out, but no growth of mold and bacteria was observed in any of them.

(Additional evaluation for bacteria)
The individual wrapping bag of the sample of each example left at room temperature for 24 weeks was opened, and the technical guideline of "base cloth impregnated cosmetics for infants'bags" edited by Japan Clean Paper Cotton Industry Association. The evaluation was performed according to the microbial test described in the Q & A on the label (revised on November 12, 2014). Five samples were evaluated for each example, and the general viable cell count was 10 cfu / g or less for all the samples, and Escherichia coli, Pseudomonas aeruginosa, and Staphylococcus aureus were negative.

(Additional evaluation for mold)
The individual packaging bags of the samples of each example left at room temperature for 24 weeks were opened, the sheets were opened one by one and visually checked. If it could not be visually determined, it was confirmed using a microscope. No breeding was confirmed.

<Test Example 1>
Whether or not the chemical solution used for the wet tissue affects the resin member to be used for the wet tissue was examined in the following test examples. As the chemicals used in the test, a 76% by volume ethanol aqueous solution, the chemicals used in Example 1 (chemicals 1 shown in Table 7), and the chemicals used in Example 2 (chemicals 2 shown in Table 7) were prepared. .. In addition, ion-exchanged water (IEW) was prepared as a control. The various members shown in Table 7 were immersed in each chemical solution or IEW at 45 ° C. for 24 hours, and the following evaluation items were evaluated, and the results are shown in Table 7.

(1) Weight change rate The weight change rate (%) of various members before and after the immersion test was measured using a precision balance (manufactured by Sartorius Japan Co., Ltd.) and evaluated according to the following criteria. The weight change rate of various members was calculated by the formula (weight of member after immersion test-weight of member before immersion test) / weight of member before immersion test × 100.
◯: When the difference from IEW is 1.0 point or less Δ: When the difference from IEW is larger than 1.0 point and 2.0 points or less ×: When the difference from IEW is larger than 2.0 points

(2) Hardness change Among the hardness meters compliant with Japanese Industrial Standards JIS K6253-3: 2012, Durometer type D (manufactured by Toyo Seiki Seisakusho Co., Ltd.), which is a type D durometer, is used to make various members before and after the immersion test. Hardness was measured and evaluated according to the following criteria.
◯: When the difference from IEW is 2 or less Δ: When the difference from IEW is greater than 2 and 4 or less ×: When the difference from IEW is greater than 4

(3) Reflectance (%)
Among the reflectance meters compliant with Japanese Industrial Standards JIS Z8722: 2009, the type of measurement method is the stimulus value direct reading method, and the geometric conditions for irradiation and light reception are omnidirectional in the direction of light reception under geometric condition b. The reflectance of various members after the immersion test was measured using the COLORIMETER CM-53D (manufactured by Murakami Color Technology Laboratory Co., Ltd.), and evaluated according to the following criteria.
◯: When the difference from IEW is 1.0 point or less Δ: When the difference from IEW is larger than 1.0 point and 2.0 points or less ×: When the difference from IEW is larger than 2.0 points

(4) Changes in appearance The changes in appearance of various members after the immersion test were visually confirmed and evaluated according to the following criteria.
◯: When the change of the member cannot be confirmed visually △: When the change of the member can be confirmed slightly visually (details are shown in Table 7)
×: When the change of the member can be clearly confirmed visually (details are shown in Table 7).

(5) Color difference Using a color difference meter CR-200 (manufactured by Konica Minolta Co., Ltd.) conforming to Japanese Industrial Standards JIS Z8730: 2009, L ^* a ^* b ^* color difference ΔE of each member after the immersion test. ^* _Ab was measured and evaluated according to the following criteria.
◯: When the difference from IEW is 1.6 or less Δ: When the difference from IEW is larger than 1.6 and 3.2 or less ×: When the difference from IEW is larger than 3.2

(6) Comprehensive evaluation Comprehensive evaluation was performed based on the following criteria from the evaluation results of the above five items.
◯: When there was no evaluation of △ or × for 5 items △: When there was an evaluation of △ for 5 items, but there was no evaluation of × ×: When there was an evaluation of × for any of the 5 items case

[evaluation]
As shown in Table 7, the chemicals used for the wet tissue of the present invention include surface whitening, surface curvature, and surface dissolution on various members of ABS resin, PA resin, polyethylene terephthalate resin, acrylic resin, polyvinyl chloride resin, and polyacetal resin. It can be seen that the change in the weight of the member is suppressed without causing problems such as a decrease in hardness.

Claims (4)

A wet tissue made by impregnating a non-woven fabric with a chemical solution.
The non-woven fabric is a wet spunlace non-woven fabric.
The nonwoven fabric has at least fibers derived from split type composite fibers.
The chemical solution
Contains benzalkonium chloride, hexadecyltrimethylammonium chloride, 4-chloro-3,5-dimethylphenol, and does not contain more than 1.0 × 10% by weight ethanol.
The content of benzalconium chloride in the chemical solution is 1.0 × 10 ^-1 % by mass or more and 2.0 × 10 ^-1 % by mass or less, and the content of hexadecyltrimethylammonium chloride is 1.0 × 10 ^-2- . By mass% or more and 5.0 × 10 ⁻² mass% or less, the content of 4-chloro-3,5-dimethylphenol is 3.0 × 10 ^-3 mass% or more and 2.0 × 10 ⁻² mass% or less. can be,
The amount of the chemical solution impregnated in 100 parts by mass of the nonwoven fabric is 120 parts by mass or more and 140 parts by mass or less.
Wet wipes with a eradication activity value of 2.0 or higher for Escherichia coli and 2.0 or higher for Staphylococcus aureus. Acrylic resin, ABS resin, PA resin, polyethylene terephthalate resin, polyvinyl chloride resin, and polyacetal resin, which are the members to be wiped, are put into the chemical solution and ion-exchanged water under the condition of liquid temperature of 45 ° C. 24. When soaked for a long time
The weight change rate when immersed in the chemical solution and the ion-exchanged water was measured, and the difference between the weight change rate when immersed in the chemical solution and the weight change rate when immersed in the ion-exchanged water was 2. The wet tissue according to claim 1, which is 0 points or less. The non-woven fabric has ultrafine fibers and has
The total amount of the fibers derived from the split type composite fiber and the ultrafine fibers in the nonwoven fabric is 50% by mass or more and 90% by mass or less.
The wet tissue according to claim 1 or 2, wherein the content of the fiber derived from the split type composite fiber in the nonwoven fabric is 25% by mass or more. The chemical solution
Propylene glycol of 2.0% by mass or more and 1.0 x 10% by mass or less,
The wet tissue according to any one of claims 1 to 3 , which contains 5.0 × 10 ^-1 % by mass or more and 8.0% by mass or less of methylpropylene glycol.