JP5598174B2 - Non-ethanol wet sheet - Google Patents

Description

  The present invention relates to a non-ethanol wet sheet using a nonwoven fabric containing rayon in the sheet.

  A wet sheet in which a liquid composition is impregnated into a sheet is used to wipe an object such as skin. Although the liquid composition contains ethanol, a person with weak skin may react with ethanol, and a non-ethanol wet sheet has been desired.

JP 2007-244568 A Japanese Patent Laid-Open No. 9-40516 JP 2004-89300 A

  Rayon has various advantages such as moisture absorption, moisture release, elasticity, and heat resistance. However, rayon is processed into rayon by treating the raw cotton with carbon disulfide. In this case, sulfide remains, and if water is present, an explosive odor derived from sulfur comes out. In this case, when the liquid composition to be impregnated into the sheet is an ethanol-containing liquid, the ethanol odor is strong, so the odor of the sheet itself is not so noticeable, but if it does not contain ethanol, there is a problem of the explosive odor of the sheet was there. The present invention has been made in view of the above circumstances, and is a non-ethanol wet sheet obtained by impregnating a non-ethanol-containing liquid composition into a non-woven fabric containing rayon, which suppresses the explosive odor peculiar to the non-woven fabric containing rayon. An object of the present invention is to provide a non-ethanol wet sheet free from stickiness during use.

  As a result of intensive studies to achieve the above object, the inventors of the present invention have added (A) 1-p-menthen-8-thiol or benzothiazole and (A) a liquid composition not containing ethanol impregnated into a nonwoven fabric containing rayon. B) It has been found that by adding a specific amount of each of polyhydric alcohol, the explosive odor of the non-ethanol wet sheet, which is a non-woven fabric containing rayon, can be suppressed, and the present invention has been made.

Accordingly, the present invention provides the following non-ethanol wet sheet.
[1]. A liquid composition containing (A) 1-p-menthen-8-thiol and / or benzothiazole (1 to 1000 ppm) and (B) polyhydric alcohol (1 to 10% by mass) in a nonwoven fabric containing rayon and not containing ethanol. Non-ethanol wet sheet impregnated with.
[2]. (B) The non-ethanol wet sheet according to [1], wherein the polyhydric alcohol is one or more selected from propylene glycol, ethylene glycol, glycerin, sorbitol, and 1,3-butylene glycol. .
[3]. The non-ethanol wet sheet according to [1] or [2], wherein the composition of the nonwoven fabric containing rayon is rayon / hydrophobic fiber (mass ratio) = 90/10 to 50/50.

  ADVANTAGE OF THE INVENTION According to this invention, the explosive odor peculiar to the nonwoven fabric containing rayon can be suppressed, the odor suppression effect can be maintained over time, and the non-ethanol wet sheet without stickiness at the time of use can be provided.

Hereinafter, the present invention will be described in detail.
The non-ethanol wet sheet of the present invention contains (A) 1-p-menthen-8-thiol or benzothiazole 1 to 1000 ppm and (B) polyhydric alcohol 1 to 10% by mass in a nonwoven fabric containing rayon. It is impregnated with a liquid composition not containing ethanol.

[Nonwoven fabric containing rayon]
The rayon used in the nonwoven fabric of the present invention reacts natural raw material cellulose such as wood pulp and bamboo with alkali (caustic soda) and carbon disulfide and dissolves it in an alkaline aqueous solution, and pushes this into a sulfuric acid aqueous solution from the die. It is produced by stretching and coagulating and regenerating fiber (cellulose) (referred to as a wet spinning method). Although carbon disulfide, which is an impurity, is removed by washing with water in the refining process, the explosive-like odor derived from sulfur remaining at this time becomes a problem.

  The material composition of the nonwoven fabric may be 100% by mass of rayon, or may contain other materials. The content of rayon is preferably 50 to 90% by mass, and preferably 70 to 80% by mass with respect to the nonwoven fabric. Examples of other materials include hydrophilic fibers and hydrophobic fibers, which can be used singly or in appropriate combination of two or more. Examples of hydrophilic fibers include natural cellulosic fibers such as cotton, pulp and hemp; regenerated cellulosic fibers such as tencel; regenerated fibers such as chitin, alginic acid fibers, and collagen fibers. Examples of hydrophobic fibers include fibers made of polyolefin resins such as polyethylene (PE) and polypropylene (PP), fibers made of polyester resins such as polyethylene terephthalate, fibers made of polyamide resins such as nylon, and polyacrylonitrile resins. And fibers made of polyvinyl ethanol resin, fibers made of polyurethane resin, and the like.

  Among these, hydrophobic fibers are preferable, and fibers made of polyolefin resins such as polyethylene (PE) and polypropylene (PP) are preferable. The mass ratio of the material composition in the nonwoven fabric is preferably rayon / hydrophobic fiber = 90 / 10-50 / 50, more preferably 80 / 20-70 / 30.

The structure of the nonwoven fabric may be a single layer structure or a multilayer structure of two or more. Moreover, there is no restriction | limiting in particular in the thickness of a nonwoven fabric, According to the objective, it can select suitably, 0.3-10 mm is preferable and 0.1-5 mm is more preferable. Moreover, 20-80 g / m < ² > is preferable and basic weight is more preferable 30-50 g / m < ² >. If the basis weight is less than 20 g / m ² , it may be broken when used, and if it exceeds 80 g / m ² , it may be disadvantageous in terms of cost.

  There is no restriction | limiting in particular as a manufacturing method of a nonwoven fabric, A well-known manufacturing method can be used, For example, the method by a spun bond, a melt blow, a thermal bond, a chemical bond, a spunlace, a needle punch etc. is mentioned.

A commercial item can be used for the non-woven fabric. For example, non-woven fabric AS-40 manufactured by Daiwabo Polytech (Rayon: hydrophobic fiber (PP / PE (50/50)) = 80:20, basis weight 40 g / m ² , open area ratio 23%) and the like can be used.

  The liquid composition impregnated in the nonwoven fabric contains (A) 1-p-mentene-8-thiol and / or benzothiazole 1 to 1000 ppm and (B) 1 to 10% by mass of a polyhydric alcohol.

(A) 1-p-Menten-8-thiol and / or benzothiazole (A) The component is a sulfur-containing compound and has a specific fragrance. 1-p-Menten-8-thiol is known to be present in trace amounts in grapefruit juice. On the other hand, benzothiazole is a liquid with a quinoline odor. Each scent has a presence that can be detected even in trace amounts, but conversely, when it is at a high concentration, it is perceived as a malodor or an unpleasant odor. In the present invention, these match well with the sulfur odor remaining in the sheet, and have the effect of relieving the unpleasant odor by mixing a very small amount. These components can be used alone or in combination of two at any ratio. The blending amount (the total blending amount when used in combination) is 1-1000 ppm (mass) in the liquid composition, preferably 10-100 ppm. If the blending amount is less than 1 ppm, the effect of suppressing the sulfur odor of the sheet is insufficient, and if it exceeds 1000 ppm, the odor of the component (A) itself is produced.

(B) Polyhydric alcohol The polyhydric alcohol has an effect of retaining the remaining sulfur odor on the sheet, and has a synergistic effect on the suppression of the sulfur odor of the sheet by combination with the component (A). As a polyhydric alcohol, the component shown in following Table 1 is mentioned, It can use individually by 1 type or in combination of 2 or more types. Among these, when a polyhydric alcohol having a boiling point higher than the boiling point of water of 100 ° C. is used, the sheet is difficult to dry and the retention effect is enhanced. Furthermore, in order to capture sulfur odor and mask it efficiently, it is effective to use a polyhydric alcohol having a high hydrophilic element. In the present invention, the ClogP value is used as a hydrophilicity index. The ClogP value is a value representing the 1-octanol / water partition coefficient P representing the ratio of equilibrium concentrations in 1-octanol and in water in the form of logarithmic log P with respect to the base 10 for a chemical substance. Becomes higher. The ClogP value can be obtained by f-method (hydrophobic fragment constant method) by decomposing the chemical structure of a compound into its components and integrating the hydrophobic fragment constants / f values possessed by each fragment (for example, , Clog 3 Reference Manual Daylight Software 4.34, Albert Leo, David Weininger, Version 1, March 1994).

  Table 1 shows boiling points and ClogP values. The ClogP value was obtained from a database provided by Syracase research corporation. Among them, those having a boiling point of 100 ° C. or more and a ClogP value of 0 or less are preferable, and in view of particularly high masking effect and solvent odor suppression, propylene glycol, ethylene glycol, glycerin, sorbitol, 1,3-butylene glycol, These mixtures are more preferred.

  (B) The compounding quantity of a polyhydric alcohol is 1-10 mass% in a liquid composition, Preferably it is 4-7 mass%. By setting it as this quantity, an effect can be expressed by a synergistic effect with (A) ingredient. When the amount is less than 1% by mass, a remarkable effect is not seen, and when the amount exceeds 10% by mass, a sticky feeling is generated and the usability is deteriorated. In addition, from the point which improves a sticky feeling more, when mix | blending sorbitol, it is good to set it as 5 mass% or less.

  Since the liquid composition of the present invention does not contain ethanol, it can be used by a wide range of people including those with weak skin and infants. In addition, lower (1 to 4 carbon) monohydric alcohols such as methanol, propanol, isopropanol, isobutyl alcohol, and t-butyl alcohol have a strong raw material odor and feel an irritating odor. .

  In the liquid composition, in addition to the components (A) and (B), optional components can be blended within a range not impairing the effects of the present invention. These can be used individually by 1 type or in combination of 2 or more types, The appropriate quantity can be mix | blended.

  Optional ingredients include preservatives, oils, silicones, lanolin derivatives, protein derivatives, acrylic resin dispersions, vitamins and other agents, bactericides, pH adjusters, antioxidants, metal sequestering agents, UV absorbers, animal and plant extracts Or a derivative thereof, a dye, a fragrance, a pigment, an inorganic powder, a clay mineral, nylon, a water-insoluble polymer powder such as polyethylene, and water.

  Examples of the preservative include benzoate, sorbate, dehydroacetate, paraoxybenzoate, 2,4,4′-trichloro-2′-hydroxydiphenyl ether, 3,4,4′-trichlorocarbanilide. Benzalkonium chloride, hinokitiol, resorcin and the like.

  Oils include castor oil, olive oil, cacao oil, coconut oil, palm oil, tree wax, jojoba oil, grape seed oil, avocado oil, sunflower oil and other vegetable oils; mink oil, egg yolk oil, lanolin, whale oil, turtle oil Animal oils such as lauric acid, myristic acid, stearic acid, oleic acid, isostearic acid, behenic acid natural and synthetic fatty acids; natural and synthetic higher alcohols such as cetanol, stearyl alcohol, hexyldecanol, octyldecanol, lauryl alcohol Class: Esters such as isopropyl myristate, isopropyl palmitate, octyldodecyl myristate, octyldodecyl oleate, and cholesterol oleate.

  Examples of the pH adjuster include sodium hydroxide, potassium hydroxide, triethanolamine, aqueous ammonia, boric acid, borax, and potassium hydrogen phosphate.

  Examples of the antioxidant include dibutylhydroxytoluene, butylhydroxyanisole, ascorbic acid and the like.

  Animal and plant extracts include lavender extract, rosemary extract, aloe extract, mulberry extract, loofah extract, agaric extract, deer yak extract, hinoki thiol extract, chamomile extract, peach leaf extract, grapefruit extract, mandarin extract, yuzu extract, lemon extract, water Degraded collagen and the like can be mentioned.

[Production method]
There is no restriction | limiting in particular as a manufacturing method of the non-ethanol wet sheet | seat of this invention, According to the objective, it can select suitably. For example, the liquid composition can be obtained by mixing the components (A) and (B), optional components as necessary, and water (remainder). Also, the apparatus for preparing the liquid composition is not particularly limited, and can be appropriately selected according to the purpose. A stirrer provided with a plurality of stirring blades (propeller, turbine, disper, etc.) capable of mixing with the shearing force as a whole. preferable. The non-ethanol wet sheet can be obtained by impregnating the nonwoven fabric containing rayon with the liquid composition. There is no restriction | limiting in particular as a method of impregnation, According to the objective, it can select suitably, For example, the method of dripping or spraying a liquid composition on a nonwoven fabric, the method of immersing a nonwoven fabric in a liquid composition, etc. are mentioned. 1-10 mass parts is preferable with respect to 1 mass part of nonwoven fabric, and, as for the impregnation rate of a liquid composition, 2-3 mass parts is more preferable. If the impregnation rate is less than 1 time, the dirt cleaning property may not be sufficient, and if it exceeds 10 times, the liquid composition may not be easily retained and may sag during use.

  The non-ethanol wet sheet is preferably packaged with a highly airtight packaging material. Airtight packaging materials include cellophane, moisture-proof cellophane, polypropylene, low density polyethylene, high density polyethylene, linear low density polyethylene, nylon, polyester, vinylidene chloride, vinyl chloride, ionomer, polyvinyl alcohol, polymethylpentene, ethylene / vinyl acetate. Examples thereof include a copolymer, an ethylene / acrylic acid copolymer, an ethylene / ethyl acrylate copolymer, polystyrene, and an aluminum foil (aluminum pouch).

  The non-ethanol wet sheet of the present invention can be preferably used for, for example, a facial sweat wipe sheet, a body sweat wipe sheet, a foot wipe sheet, a nursing wipe sheet, and the like. It is particularly useful for applications such as a facial sweat wipe sheet for wiping the mouth and mouth.

  EXAMPLES Hereinafter, although an Example and a comparative example are shown and this invention is demonstrated concretely, this invention is not restrict | limited to the following Example. In the following examples, unless otherwise specified, “%” in the composition indicates mass%, the ratio indicates the mass ratio, and the amount of each component in the table is an amount converted into a pure component. In addition, all (A) components are using the 1 mass% solution diluted with the dipropylene glycol solution. For example, when 0.01 mass% of 1 mass% benzothiazole solution is mix | blended with a liquid composition, the density | concentration in a liquid composition will be 1 ppm. In the table, for the component (A), the amount of the component (A) in the liquid composition is shown in parentheses () together with the amount of the 1 mass% solution.

[Examples 1-20, Comparative Examples 1-9]
Liquid compositions having the compositions shown in Tables 2 to 7 were prepared by mixing the components. The obtained liquid composition was impregnated 2.5 times (mass) with respect to a nonwoven fabric (AS-40 manufactured by Daiwabo Polytec (Rayon / PP + PE = 8/2)) to obtain a wet sheet. Ten obtained wet sheets were enclosed in an aluminum pouch. The following evaluation was performed on the wet sheet.

[Odor of wet sheet]
Just after the preparation and after one month at 40 ° C, a specialized panelist shows the odor of the wet sheet (nonwoven fabric odor, component (A) odor, and solvent odor) when the wet sheet is taken out from the aluminum pouch and the fingers are wiped. Sensory evaluation was performed by five people, and the score was assigned according to the following criteria. For evaluation of odor, unpleasant odor including nonwoven fabric odor, (A) component odor and solvent (polyhydric alcohol) odor was determined. Results are shown according to the following criteria based on the average of five people.
<Score standard>
5: No odor and unpleasant odor of the nonwoven fabric 4: No odor of the nonwoven fabric and almost no unpleasant odor 1: Clearly feel the odor and unpleasant odor of the nonwoven fabric
<Criteria for rating average score>
◎: 4.0 or more ○: 3.0 or more and less than 4.0 Δ: 2.0 or more and less than 3.0 ×: less than 2.0

<A feeling of stickiness>
A wet sheet was taken out from the aluminum pouch, and the stickiness when the fingers were wiped was subjected to a sensory evaluation with five professional panelists, and scored according to the following rating criteria. Results are shown according to the following criteria based on the average of five people.
<Score standard>
5: No sticky feeling on the wet sheet 4: Little sticky feeling on the wet sheet 3: Little sticky feeling on the wet sheet 2: Little sticky feeling on the wet sheet 1: One sticky feeling on the wet sheet Feel clearly
<Criteria for rating average score>
◎: 4.0 or more ○: 3.0 or more and less than 4.0 Δ: 2.0 or more and less than 3.0 ×: less than 2.0

  In Examples 9 and 10, since isoprene glycol and hexylene glycol had the odor of the solvent itself, a slight solvent odor was felt.

The raw materials used in Examples and Comparative Examples are shown below.
Benzothiazole: Tokyo Chemical 1-p-Menten-8-thiol: Penta Propylene Glycol: ADEKA Co., Ltd. Ethylene Glycol: Nippon Surfactant Co., Ltd. Glycerin: Sakamoto Yakuhin Kogyo Co., Ltd. Sorbitol: ROQUETTE Co., Ltd. 1, 3-butylene glycol: manufactured by Daicel Chemical Industries, Ltd. isoprene glycol: manufactured by Kuraray Co., Ltd., hexylene glycol: manufactured by Mitsui Petrochemical Co., Ltd.

Claims (3)

  A liquid composition containing (A) 1-p-menthen-8-thiol and / or benzothiazole (1 to 1000 ppm) and (B) polyhydric alcohol (1 to 10% by mass) in a nonwoven fabric containing rayon and not containing ethanol. Non-ethanol wet sheet impregnated with.   (B) The non-ethanol wet sheet according to claim 1, wherein the polyhydric alcohol is one or more selected from propylene glycol, ethylene glycol, glycerin, sorbitol, and 1,3-butylene glycol. .   The non-ethanol wet sheet according to claim 1 or 2, wherein the composition of the non-woven fabric containing rayon is rayon / hydrophobic fiber (mass ratio) = 90/10 to 50/50.