JP5765872B2 - Sheet product for wiping - Google Patents

Description

  The present invention relates to a wiping sheet such as a wet tissue, a cleaning sheet, and a wipe wipe, which is obtained by impregnating a sheet-like fiber assembly base material such as nonwoven fabric, woven fabric, or paper with a chemical solution containing an antibacterial agent. .

In general, such a wiping sheet is sold by being stored in a packaging means such as a sealed container or bag having a sheet take-out port that can be sealed by an opening / closing lid, and the user opens the take-out port. A usage pattern is adopted in which the internal sheet is pulled out from there.
In such a wiping sheet, it has been proposed that an antibacterial agent is contained in a chemical solution for various purposes such as preserving during storage and use and sterilization of a wiping target (patent document). 1-4).

  As antibacterial agents, parabens are often used from the viewpoint of achievements and the like. However, even if parabens are included in the chemical solution, when moisture in the chemical solution evaporates and dew condensation occurs inside the container or the like, parabens are not included in the dew condensation, and bacteria are likely to grow on the inner surface of the container. There is a problem. In addition, since parabens may cause skin troubles such as rough skin and rash when attached to the skin, it is desired that the body wiping products should be preserved with paraben-free (paraben-free). Furthermore, parabens are hardly soluble in water, and when water is used as a solvent for other components, it is necessary to coexist with the paraben solvent. There is a risk of precipitation due to reaction. In addition, depending on the pH of the chemical solution, there is a problem that a peculiar odor is generated or the effect becomes poor.

  Like parabens, ethanol and isopropanol may be used for antiseptic purposes, but both are strongly irritating to the skin and have a unique odor. It is hoped that

Quaternary ammonium salts are also used as an antibacterial agent in a wide range of applications. However, like parabens, quaternary ammonium salts are not included in dew condensation, so that there is a problem that bacteria easily propagate on the inner surface of the container. Also, quaternary ammonium salts, OH of NH ⁴⁺ group and cellulosic fibers ^- bond with groups, salt formation due to the influence of other compounding ingredients, and by precipitation, reduces the quaternary ammonium salt concentration in the chemical solution Since it is easy, it is necessary to increase the blending amount, but there is also a problem that the blending amount is limited due to problems of solubility, foaming, and legal regulations.
JP 2002-0383363 A JP 2004-188091 A JP 2006-181334 A JP 2006-340949 A

  Therefore, the main problem of the present invention is to improve the overall antibacterial effect including antibacterial effect in condensation.

The present invention that has solved the above problems is as follows.
<Invention of Claim 1>
A sheet-like fiber assembly substrate comprising 35 to 60 % by weight of cellulosic fibers and 40 to 65 % by weight of hydrophobic fibers, and having a basis weight of 10 to 100 g / m ² and a thickness of 0.1 to 5.0 mm. On the other hand, in the wiping sheet product, wherein the wiping sheet impregnated with a chemical solution containing an antibacterial agent is housed in a sealed packaging means having a sheet take-out port that can be sealed by an open / close lid,
The content of the chemical solution is 2.5 to 4.5 times the dry weight of the fiber assembly base material,
The chemical solution contains 90% by weight or more of water, 0.025 to 1.000% by weight of phenoxyethanol or / and phenoxyisopropanol, and 0.02 to 1.50% by weight of a quaternary ammonium salt as the antibacterial agent. 0.2 to 4.0% by weight of polyol and 0.02 to 0.40% by weight of benzoate, and no parabens, ethanol or isopropanol.
A wiping sheet product characterized by this.

(Function and effect)
The present inventor has conceived the use of a water-soluble and volatile antibacterial agent as a technique for solving the above-mentioned problems, but it is difficult to adjust dissolution and evaporation suppression, and therefore, it is necessary to use another solvent component together. The solvent component may cause a slippery or sticky feeling, the types and concentrations of substances that can be used are limited from the viewpoint of safety, the surface (sebum or paint) to be wiped is dissolved, and There is a possibility that it may cause the surface and cloudiness of the painted surface, it is difficult to use to wipe around the nose when the smell is strong, the skin irritation is strong, and it is difficult to use for wiping around the mucous membrane It became clear that it was necessary to solve new problems.

  The present invention also takes into consideration the solution of these problems, and the above-described characteristic composition can improve the overall antibacterial effect including antibacterial effects in condensation. That is, phenoxyethanol and phenoxyisopropanol, which are volatile antibacterial agents, are contained in the condensation, and the antibacterial effect in the condensation is exhibited. In addition, by using a combination of polyols, evaporation of phenoxyethanol and phenoxyisopropanol is suppressed, and the durability of the antibacterial effect in the chemical solution / base material / wiping target is improved. Furthermore, the antibacterial effect of the chemical solution is ensured by the antibacterial action of the polyol, and the antibacterial spectrum of phenoxyethanol and phenoxyisopropanol is supplemented, so that the effect is exerted on more antibacterial objects. Further, when only a combination of phenoxyethanol, phenoxyisopropanol and polyol is used, the antibacterial spectrum is insufficiently compensated and the antibacterial effect of the base material is insufficient. Since it is used in combination with a quaternary ammonium salt that is easily bonded to fibers and difficult to evaporate, the effect is exerted on more antibacterial objects, and the antibacterial effect on the substrate is also improved. Moreover, when there is much content of the quaternary ammonium salt in a chemical | medical solution, it will cause nulliness, but it will become a thing without or little nullness by couple | bonding a cellulose fiber with a base material.

  Moreover, it is preferable to add a benzoate as an antibacterial component of a chemical solution because the antibacterial spectrum can be further compensated.

  Moreover, in this invention, it is especially suitable when using the fiber base material of such a structure, a fabric weight, and thickness. In particular, in the present invention, since the affinity of the chemical solution to the hydrophobic fibers is increased by the action of the polyol contained in the chemical solution, the chemical solution penetration rate and the penetration rate into the base material are improved as compared with the case where no polyol is contained. There is also an advantage that the overall antibacterial effect is improved.

  Further, the wiping sheet containing the chemical solution is accommodated in a sealed packaging means having a sheet take-out port that can be sealed by an opening / closing lid, and a necessary amount of wiping sheet is taken out from the packaging means for use. In the product form to be used, a certain period of time is required until the entire amount of the sheet is used up, and therefore, bacteria are likely to propagate due to condensation. Therefore, it is particularly preferable to employ the wiping sheet according to the present invention described above in such a product form.

  As described above in detail, according to the present invention, various advantages such as improvement of the overall antibacterial effect including antibacterial effect on condensation are brought about.

Hereinafter, embodiments of the present invention will be described in detail.
The wiping sheet according to the present invention is produced by adding a chemical solution in which various components are added to purified water to a sheet-like fiber aggregate substrate containing cellulosic fibers, such as a nonwoven fabric. . In the product form, the wiping sheet is a sealed container having a sheet take-out port that can be sealed by an open / close lid (for example, JP 2008-105746 A, JP 2007-176546 A, JP 2007-176545 A). Gazette, JP-A-2007-176544, JP-A-2006-341905) and bags (for example, JP-A-2005-088970) can be accommodated. In use, the user opens the outlet from the one in which the wiping sheet is put directly in the container or bag, or the bag in which the wiping sheet is put directly in the container. Pull out the sheet and use it.
In addition, it is suitable to form an unevenness of 0.3 to 0.8 mm on the surface of the wiping sheet. When uneven portions are formed on the surface of the wiping sheet, the retention performance of the chemical solution is improved and the contact area of the laminated wiping sheet can be reduced, so that the wiping sheet can be easily taken out from the sealed container. .

The content of the chemical solution in the wiping sheet can be appropriately determined in the range of 2.5 to 4.5 times the dry weight of the fiber aggregate base material, but is particularly in the range of 2.5 to 4 times. Is preferred. If the chemical solution content is too low, the liquid component will not penetrate sufficiently, resulting in uneven impregnation, and there is a problem that the components in the solution are unevenly distributed as in chromatography. Therefore, there is a problem that it accumulates below and becomes excessively wet only on the lower side.

  The sheet-like fiber assembly base material of the present invention is not particularly limited as long as it contains cellulosic fibers, and paper, non-woven fabric, woven fabric or the like can be used, and it has water decomposability. In addition to those not present, those having water decomposability can also be used.

  As the cellulosic fibers, natural fibers such as cotton, hemp and pulp, regenerated fibers such as rayon, cupra and lyocell, and semi-synthetic fibers such as acetate fibers (triacetate and diacetate) can be used. Among these fibers, rayon is particularly preferable. Rayon is rich in water absorption and is easy to handle, and a certain length of fiber can be obtained at low cost. Cellulosic fibers are blended in the base at a ratio of 35 to 60% by weight. If the cellulosic fiber content is too low, sufficient water retention and flexibility cannot be provided, and if it is too high, the wet strength will be too low and it will be easy to break and will not be able to maintain bulk, and will pop up from the container. Elongation occurs too much when taking out with the formula.

The fiber assembly substrate of the present invention contains hydrophobic fibers (including water repellency) such as synthetic fibers. The content of hydrophobic fibers in the fiber base is 40 to 65% by weight.
For example, heat-fusible fibers can be blended as hydrophobic fibers and the fibers can be fused and bonded. As the heat-fusible fiber, any fiber that melts by heating and exhibits adhesiveness to each other can be used. This heat-fusible fiber may be a single fiber or a composite fiber in which two or more synthetic resins are combined. Specific examples include polyolefin single fibers such as polyethylene, polypropylene and polyvinyl alcohol, polyethylene terephthalate / polyethylene, polyethylene terephthalate / polypropylene, polypropylene / polyethylene, polyethylene terephthalate-ethylene / propylene copolymer, low-melting point polyester-polyester, etc. A core-sheath type composite fiber or an eccentric core-sheath type composite fiber whose sheath part is made of a relatively low melting point, or a part of each component made of polyethylene terephthalate / polypropylene, polyethylene terephthalate / nylon, polypropylene / polyethylene is the surface Splitting by heat shrinkage of one component consisting of split type composite fiber or polyethylene terephthalate / ethylene-propylene copolymer exposed in Or the like can be used composite fibers. In this case, a core-sheath type composite fiber is preferable when productivity and dimensional stability are important, and an eccentric type composite fiber is preferable when importance is placed on volume. Further, if the softness is important, when a split type composite fiber or a heat split type composite fiber is used, each component can be easily split into ultrafine fibers by high-pressure water flow treatment.
Moreover, in the fiber assembly base material of this invention, a thermoplastic synthetic fiber other than the said heat-fusible fiber can be mixed. As the thermoplastic fiber, various synthetic fibers exist, and among them, a polyester fiber is preferable. Polyolefin fibers such as polyethylene and polypropylene have poor confounding properties when subjected to high-pressure water flow treatment, and become inferior in fluffing and wet strength.

  In the case of using the heat-fusible fiber and the thermoplastic fiber, it is desirable that the content of the heat-fusible fiber in the base material is 10 to 30% by weight and the content of the thermoplastic fiber is 40% by weight or less. When there are too few heat-fusible fibers, the strength when wet cannot be ensured, and the elongation becomes too large when popping up from the container. On the other hand, if it is too much, the texture becomes hard and the feel becomes rough. When the content of the thermoplastic fiber exceeds 40% by weight, the water retention is impaired and the wet performance is remarkably lowered. By mixing thermoplastic fibers, the stiffness when wet is improved and a bulky nonwoven fabric can be obtained. Moreover, when a part is exposed to the nonwoven fabric surface, a sticky feeling is relieved even when wet due to hydrophobicity, and a dry feel is imparted.

  Desirably, the thermoplastic fiber has thermal crimpability. In order to impart heat crimpability, a form of side-by-side type composite fiber in which synthetic resins having different heat shrinkage temperatures are bonded to thermoplastic fibers is adopted. For example, the melting point of the polyester fiber is 255 ° C. for polyethylene terephthalate and 215 ° C. for polybutylene terephthalate. As the low melting point resin to be bonded to this, a resin substantially the same as the melting point temperature of the above-mentioned heat-fusible fiber is used. It is better to do so.

In the case of the sheet-like fiber aggregate base material of the present invention, the fiber basis weight is preferably 10 to 100 g / m ² , particularly about 30 to 80 g / m ² , and the thickness is 0.1 to 5.0 mm, particularly preferably 0.00. It is preferably about 2 to 3.0 mm. When the fiber basis weight is too small or the thickness is too thick, the strength of the sheet becomes insufficient, and when the fiber basis weight is too large and the thickness is too thin, the flexibility becomes poor.
On the other hand, the chemical solution impregnated in the sheet-like base material contains at least three types of antibacterial agents such as phenoxyethanol or / and phenoxyisopropanol, quaternary ammonium salt and polyol, and water as a solvent, and also contains parabens. Not.

  Phenoxyethanol and phenoxyisopropanol contained in chemicals are a kind of glycol ethers, are colorless, transparent, slightly viscous, weakly volatile liquids having a hydroxyl group and an ether group, and a slight fragrance. It will be. It also has bactericidal action against gram-negative bacteria. Content in a chemical | medical solution is 0.025 to 1.000 weight%. If the content is too small, there is a problem that the antibacterial effect in the condensation is insufficient, and if it is too much, the odor is stiff and it tends to evaporate, so the condensation in the container increases and the sheet impregnation rate decreases. There is. Since phenoxyethanol and phenoxyisopropanol have volatility, even if moisture in the chemical solution evaporates and dew is formed inside the container, phenoxyethanol and phenoxyisopropanol are contained in the dew, so antibacterial effect on condensation Will come out.

  The polyol contained in the chemical solution has a broad antibacterial spectrum, has not only an antibacterial effect, but also a moisturizing property, and also has an affinity for hydrophobic fibers. Examples include 1,3-butanediol, 1,2-pentanediol, 1,2-hexanediol, 2,2-dimethyl 1-phenyl 1,3-propanediol, 1,2-octanediol, caprylyl glycol , Ethylene hexyl glycerin, ε polylysine, dipropylene glycol and the like. Content in the chemical | medical solution of a polyol is 0.2 to 4.0 weight%. If the polyol content is too low, the antibacterial effect may be insufficient, or the evaporation of phenoxyethanol or phenoxyisopropanol may not be suppressed, and the impregnation rate of the sheet may decrease. There is a problem of impairing the feeling. When a polyol is used in combination, evaporation of phenoxyethanol is suppressed due to its moisturizing property, and the durability of the antibacterial effect in chemicals, substrates, and objects to be wiped is improved. Furthermore, the antibacterial effect of the chemical solution is ensured by the antibacterial action of the polyol, and the antibacterial spectrum of phenoxyethanol is supplemented, so that the effect is exhibited against more antibacterial objects.

The quaternary ammonium salt contained in the chemical solution is a cationic surfactant, and has a property of being easily bonded to the OH ⁻ group of the cellulosic fiber of the fiber assembly base material by NH ⁴⁺ group. It has bactericidal action against gram-negative bacteria, part of fungi, and part of enveloped viruses. Examples include benzalkonium chloride, alkylpyridinium salts (such as cetylpyridinium chloride), stearyldimethylbenzylammonium chloride, benzethonium chloride, polyalkoxy quaternary ammonium salts (polyoxyethylene alkylamine, polyoxyethylene laurylamine, polyoxyethylene) Stearylamine). Content in the chemical | medical solution of a quaternary ammonium salt is 0.02-1.50 weight%. If the content of the quaternary ammonium salt is too small, the antibacterial effect is insufficient, or there is a problem that the antibacterial effect in the liquid layer cannot be maintained due to ionic bond with the OH group of cellulose, and if it is too much There is a problem that when the temperature is lowered, it cannot be completely dissolved and precipitates, it forms a salt with other components and becomes cloudy, or foaming or slimming due to surface activity occurs. When only a combination of phenoxyethanol and polyol is used, the antibacterial spectrum is insufficiently compensated and the antibacterial effect of the base material is insufficient. However, in the present invention, the base material containing the cellulosic fiber is easily bonded to the cellulosic fiber. Since it employs in combination with a quaternary ammonium salt which is difficult to evaporate, the effect is exhibited against more antibacterial objects, and the antibacterial effect on the substrate is also improved. Moreover, when there is much content of the quaternary ammonium salt in a chemical | medical solution, although it causes a slip, it will become a thing which does not have a little slip feeling by couple | bonding a cellulose fiber with a base material.
Although these three types of antibacterial agents alone provide a sufficient antibacterial effect, other antibacterial agents can be added to supplement the antibacterial spectrum. As the antibacterial agent in this case, benzoate is preferable. Sodium benzoate is preferred as the benzoate. The content of benzoate in the chemical solution is 0.02 to 0.40% by weight. If the content of benzoate is too small, there is a problem that the antibacterial effect is insufficient, and if it is too much, there is a problem that the skin is irritated.

The chemical solution of the present invention uses water as a basic solvent. The water content in the chemical solution is 90% by weight or more. If the water content is too low, the components will not dissolve sufficiently, the feel similar to water will not be obtained, and there will be discomfort, irritation and specific odors such as stickiness, nulliness, etc. However, if the amount is too large, the relative concentration of the antibacterial agent becomes thin, and a sufficient antiseptic effect cannot be maintained.
Moreover, components other than those described above can be added as long as the effects of the present invention are not impaired.

Hereinafter, the effects of the present invention will be clarified by showing examples.
In this example, Table 1 shows a fiber aggregate base material composed of rayon fibers (60% by weight) as cellulosic fibers and PET fibers (20% by weight) and PE / PP fibers (20% by weight) as hydrophobic fibers. It is the result of impregnating each chemical solution and measuring the antibacterial effect at the time of dew condensation and the antibacterial spectrum compensation.

As the bacterial solution, a solution suspended in physiological saline so that the number of bacteria was 10 ⁶ to 10 ⁷ cells / ml was used.
Antibacterial property of the sheet is 4 layers of 5 cm square samples put into a sterilized synthetic resin container, 0.05 ml of the bacterial solution is dropped, the lid is closed and stored at 25 ± 1 ° C, and the number of viable bacteria is 7 days later. Was measured.
For the antibacterial effect of the dew condensation part, 0.05 ml of the bacterial solution was dropped into 0.1 ml of the dew condensation component, stored at 25 ± 1 ° C., and the viable cell count was measured after 7 days.
Determining if the case of 10 or less is the number of bacteria (detection limit) of "○", in the case of 10 to 10 ² or less is "△", the 10 ² or more was defined as "×".
As described above, as shown in Table 1, in the present invention, it is possible to obtain a wiping sheet excellent in overall antibacterial effect including antibacterial effect in condensation.

  INDUSTRIAL APPLICABILITY The present invention can be used as a wet tissue, a cleaning sheet, an infant or adult body or butt wipe, and other wiping sheets.

Claims (1)

A sheet-like fiber assembly substrate comprising 35 to 60 % by weight of cellulosic fibers and 40 to 65 % by weight of hydrophobic fibers, and having a basis weight of 10 to 100 g / m ² and a thickness of 0.1 to 5.0 mm. On the other hand, in the wiping sheet product, wherein the wiping sheet impregnated with a chemical solution containing an antibacterial agent is housed in a sealed packaging means having a sheet take-out port that can be sealed by an open / close lid,
The content of the chemical solution is 2.5 to 4.5 times the dry weight of the fiber assembly base material,
The chemical solution contains 90% by weight or more of water, 0.025 to 1.000% by weight of phenoxyethanol or / and phenoxyisopropanol, and 0.02 to 1.50% by weight of a quaternary ammonium salt as the antibacterial agent. 0.2 to 4.0% by weight of polyol and 0.02 to 0.40% by weight of benzoate, and no parabens, ethanol or isopropanol.
A wiping sheet product characterized by this.