Liquid-impregnated sheet

Abstract

To provide a liquid-impregnated sheet that can improve the liveliness and refreshment of the facial appearance. [Solution] The liquid-impregnated sheet 1 has a base sheet containing a fibrous material, and is used by wrapping it around the neck after the base sheet has been impregnated with liquid. Preferably, the base sheet has a color represented in the Munsell color system that satisfies any of the following conditions 1 to 3. Condition 1: Hue 0.1B or higher and 10B or lower, lightness 6.0 or higher and less than 10, saturation 1 or higher. Condition 2: Hue 0.1 PB or higher and 7.4 PB or lower, lightness 8.0 or higher and less than 10, saturation 1 or higher. Condition 3: Hue 0.1BG or higher and 10BG or lower, lightness 8.0 or higher and less than 10, saturation 1 or higher.

Description

Technical Field

[0001] The present invention relates to a liquid-impregnated sheet.

Background Art

[0002] In situations where one easily feels hot, such as on high-temperature days, under the blazing sun, or during sports, cooling the neck area is performed from the perspectives of preventing heat stroke and alleviating heat discomfort. As a method for cooling the neck area, placing or wrapping a water-soaked towel around the neck can be mentioned.

[0003] On the other hand, sheets obtained by impregnating a nonwoven fabric with a liquid have also been proposed. For example, the present applicant has previously proposed a liquid-impregnated sheet that includes a base sheet containing a fiber material and a liquid impregnated into the base sheet, and is used by being placed around the neck (Patent Document 1).

Prior Art Literature

Patent Literature

[0004]

Patent Document 1

Summary of the Invention

Problem to be Solved by the Invention

[0005] However, in the above-described conventional technology, when the liquid-impregnated sheet is wrapped around the neck, depending on the color of the liquid-impregnated sheet, the facial impression may change, and in some cases, a dark facial impression may be given.

[0006] The present invention relates to a liquid-impregnated sheet capable of improving the vividness and refreshing feeling of facial impression.

Means for Solving the Problem

[0007] The present invention relates to a liquid-impregnated sheet having a base sheet containing a fibrous material, wherein the base sheet is impregnated with a liquid and used by being wrapped around the neck. In one embodiment, it is preferable that the base sheet has a color represented in the Munsell color system that satisfies any of the following conditions 1 to 3. Condition 1: Hue 0.1B or higher and 10B or lower, lightness 6.0 or higher and less than 10, saturation 1 or higher. Condition 2: Hue 0.1 PB or higher and 7.4 PB or lower, lightness 8.0 or higher and less than 10, saturation 1 or higher. Condition 3: Hue 0.1BG or higher and 10BG or lower, lightness 8.0 or higher and less than 10, saturation 1 or higher. [Effects of the Invention]

[0008] The liquid-impregnated sheet of the present invention can improve the liveliness and refreshment of the facial appearance. [Brief explanation of the drawing]

[0009] [Figure 1] Figure 1 is a plan view of an unfolded state showing one embodiment of the liquid-impregnated sheet of the present invention. [Figure 2] Figures 2(a) and 2(b) show the liquid-impregnated sheet from Figure 1 being worn around the neck; (a) is a schematic front view, and (b) is a schematic cross-sectional view. [Figure 3] Figure 3 is a schematic diagram of the Munsell color circle. [Figure 4] Figure 4 is a perspective view showing an example of another method for connecting the liquid-impregnated sheets shown in Figure 1. [Figure 5] Figure 5 is a color chart of Munsell color equivalents for hue 5B. [Figure 6] Figure 6 is an explanatory diagram of the measurement method for the color of the base sheet. [Figure 7] Figure 7 is a photograph of the liquid-impregnated sheet obtained in Example 2. [Figure 8] Figure 8 is a photograph of the liquid-impregnated sheet obtained in Comparative Example 2. [Modes for carrying out the invention]

[0010] The present invention will be described below with reference to the drawings, based on preferred embodiments. Figure 1 shows one embodiment of the liquid-impregnated sheet of the present invention. Note that the liquid-impregnated sheet 1 of the present invention does not include clothing products such as scarves that are used without liquid impregnation. The liquid-impregnated sheet 1 shown in Figure 1 has a longitudinal direction X and a transverse direction Y. More specifically, it has a rectangular shape, with the direction along the longer side of the rectangle being the longitudinal direction X, and the direction perpendicular to the longitudinal direction X being the transverse direction Y. The ratio L1 / L2 of the liquid-impregnated sheet 1 to the total length L1 in the longitudinal direction X relative to the total length L2 in the transverse direction Y is preferably 1 or more, more preferably 1.2 or more, from the viewpoint of improving ease of wrapping around the neck, and preferably 50 or less, more preferably 30 or less, and also preferably 1 to 50, more preferably 1.2 to 30, from the viewpoint of improving portability.

[0011] When the liquid-impregnated sheet 1 is for children (elementary school age or younger), the ratio L1 / L2 of the total length L1 in the longitudinal direction X to the total length L2 in the short direction Y is preferably 1.0 or more, more preferably 1.2 or more, from the viewpoint of improving ease of wrapping around the neck, and preferably 20 or less, more preferably 18 or less, and also preferably 1 to 20, more preferably 1.2 to 18, from the viewpoint of improving portability.

[0012] When the liquid-impregnated sheet 1 is for adults (junior high school students and older), the ratio L1 / L2 is preferably 1.5 or more, more preferably 1.7 or more, from the viewpoint of improving ease of wrapping around the neck, and preferably 50 or less, more preferably 30 or less, and also preferably 1.5 to 50, more preferably 1.7 to 30, from the viewpoint of improving portability.

[0013] The liquid-impregnated sheet 1 has, in the longitudinal direction X, a central region A and side regions B and C located on both sides of the central region A. The liquid-impregnated sheet 1 can be worn wrapped around the neck, and the side regions B and C can be connected to each other in a state where the central region A is arranged around the neck. Fig. 2 shows a state where after the central region A is applied to the back side of the neck, one side region B and the other side region C are connected on the front side of the neck. As shown in Fig. 2, the central region A is a region assumed to be arranged in a state of being in contact with the neck circumference, and the side regions B and C are regions assumed to maintain the annular shape of the liquid-impregnated sheet 1 arranged around the neck by coupling the regions to each other. As for the method for connecting the side regions B and C, for example, a method may be adopted in which a first fastening member is provided on one of the side regions B and C and a second fastening member is provided on the other, and the first fastening member and the second fastening member are coupled to each other by engagement, fitting, pressure-sensitive adhesion, adhesion, pressure bonding, or a combination of two or more of these. The first and second fastening members may be a button and a buttonhole, or may be a male member and a female member of a mechanical hook-and-loop fastener. Fig. 2 shows an example in which a male member 7 of a mechanical hook-and-loop fastener and a to-be-engaged region engageable with the male member 7 are provided on different surfaces of the liquid-impregnated sheet 1, and the side region C is coupled in a state of being superimposed on the side region B.

[0014] Further, as a method for connecting the side regions B and C, for example, after applying the liquid-impregnated sheet 1 to the neck from the neck muscle side such that the one side region B, in which an opening 5 is formed from the beginning, is located on the left side of the neck as viewed from the user, and the other side region C, in which an opening 5 is not formed, is located on the right side of the neck as viewed from the user [Fig. 4(a)], a part of the other side region C is inserted into the opening 5, and the portion 6 protruding from the opening 5 is pulled from the opposite side and pulled out until it appropriately fits around the neck to achieve connection [Fig. 4(b)]. In this case, the state where the liquid-impregnated sheet 1 is worn around the neck is stably maintained by interaction such as friction between the opening 5 and the portion inserted into the opening 5. Instead of providing the opening 5 in the liquid-impregnated sheet 1 from the beginning, perforations 2 may be provided in the one side region B, and the opening 5 may be formed by breaking the perforations 2.

[0015] The liquid-impregnated sheet 1 comprises a base sheet containing a fibrous material and a liquid impregnated into the base sheet. Examples of the base sheet containing a fibrous material include nonwoven fabrics, woven fabrics, and laminates thereof. Among these, nonwoven fabrics or woven fabrics are preferred. Examples of the nonwoven fabric include single-layer or multi-layer nonwoven fabrics. As the nonwoven fabric, nonwoven fabrics produced by various manufacturing methods can be used without particular limitation. Examples of single-layer nonwoven fabrics include spunlace nonwoven fabrics, spunbond nonwoven fabrics, air-through nonwoven fabrics, and air-laid nonwoven fabrics. Examples of multi-layer nonwoven fabrics include spunbond-meltblown composite nonwoven fabrics (SM, SMS), composite nonwoven fabrics of air-through nonwoven fabrics and spunbond nonwoven fabrics, and composite nonwoven fabrics having a three-layer structure of spunlace / spunbond / spunlace. Examples of constituent fibers of the nonwoven fabric include cellulosic fibers such as pulp, lyocell, rayon, acetate and cotton, polyolefins such as polyethylene and polypropylene, polyester, and polyamide, and these may be used as a blended cotton. From the viewpoint of liquid retention, it is preferable that the whole or a part of the nonwoven fabric in the thickness direction is a layer composed of cellulosic fibers. Based on the total mass of the nonwoven fabric, the mass proportion of the cellulosic fibers is preferably 10% or more, more preferably 20% or more, and the upper limit is 100%. From the viewpoint of being easily wrapped around the neck, the nonwoven fabric has a basis weight of 30 g / m 2 or more, more preferably 35 g / m 2 or more. Further, from the viewpoint of fit to the neck, the nonwoven fabric has a basis weight of 160 g / m 2 or less, more preferably 130 g / m 2 or less.

[0016] In this invention, the base sheet is colored. When the base sheet is a single layer, typically the single layer is colored. When the base sheet is a laminated sheet of two or more layers, one or more sheets constituting the laminated sheet are colored so that when the wearer of the liquid-impregnated sheet is viewed from the front, the color of the colored sheet is visible directly or indirectly through other sheets. The base sheet may be colored by including a colorant in the fiber material, or by dyeing with dyes, printing, etc. Coloring as used herein includes white and does not matter whether the color is chromatic or achromatic. The liquid-impregnated sheet only needs to have a color that is visible from the outer side, opposite to the wearer's skin, when worn around the neck; it is acceptable for only one side to be colored. If only one side is colored, it is preferable to indicate on the packaging, etc., that using the sheet with the colored side facing outwards is preferable for improving facial appearance.

[0017] If the base sheet is a single-layer sheet, it is preferable that at least one side of the base sheet is colored, with 50% or more, preferably 90% or more, and more preferably 100% of the total area of ​​that side being colored. If the base sheet is a single-layer sheet, it is preferable that on each of the two sides of the base sheet, 50% or more, preferably 90% or more, and more preferably 100% of the area of ​​each side being colored. When the base sheet is a laminated sheet of two or more layers, it is preferable that at least one side of one of the sheets constituting the laminated sheet is colored, with 50% or more, preferably 90% or more, and more preferably 100% of the total area of ​​that side being colored. When the base sheet is a laminated sheet of two or more layers, it is preferable that at least both sides of one of the sheets constituting the laminated sheet are colored, with 50% or more, preferably 90% or more, and more preferably 100% of the area of ​​each side being colored.

[0018] In this invention, the color of the base sheet is indicated using the Munsell color system. The Munsell color system is a color system that represents color in stages of three attributes: hue, lightness, and saturation. In the Munsell color system, hue is expressed by combining the five basic hues R (red), Y (yellow), G (green), B (blue), and P (purple), arranged clockwise on the Munsell color wheel (see Figure 3), with the ten main hues YR (yellow-red), GY (yellow-green), BG (blue-green), PB (blue-purple), and RP (red-purple) placed between them, and a numerical value (0.1 to 10, etc.). In this specification, in the clockwise direction of the Munsell color wheel, 0.1B is used next to 10BG, and 0.1PB is next to 10B. When showing the average value, a number with two decimal places is used. In the Munsell color system, lightness indicates that the color becomes brighter as its value increases, and darker as its value decreases. Saturation indicates that the color becomes more vivid as its value increases, and duller as its value decreases. Figure 5 shows an example of a color chart of Munsell color isochromatic colors for hue 5B.

[0019] In this invention, the color of the base sheet, i.e., the hue, lightness, and chroma of the Munsell color system, can be measured by the following method. <Method for measuring hue, lightness, and saturation in the Munsell color system> The hue, lightness, and chroma of the Munsell color system can be measured by placing a standard white plate (Konica Minolta white calibration plate CM-A145) under the substrate sheet and using, for example, a spectrophotometer (product name: CM-2600d, manufactured by Konica Minolta). The measurement is performed on 15 measurement points with a circular area of ​​8 mm in diameter as the measurement range, and the distance between the center points of each point is 15 mm or more. Preferably, the 15 measurement points are arranged in series, with 5 measurement points in the longitudinal direction of the substrate sheet and 3 measurement points in series in the short direction of the substrate sheet. The distance between the center points of the measurement points in series in the longitudinal direction is 40 mm, and the distance between the center points of the measurement points in series in the short direction is 15 mm. The 15 measurement points are arranged so that the center point of the central measurement point among the 15 measurement points coincides with the center point located in both the longitudinal and short directions of the substrate sheet (see Figure 6). If it is not possible to secure 15 measurement points due to reasons such as a small surface area on the base sheet, measurements should be taken at as many measurement points as possible. A D65 was used as the light source, and a MAV:φ8mm / φ11mm (measurement diameter / illumination diameter) was used as the target mask (attachment). The measurement diameter of the target mask (attachment) is the diameter of the measurement range.

[0020] In this invention, the hue, lightness, and saturation of the base sheet are calculated using the following method based on the hue, lightness, and saturation values ​​obtained at each measurement point. <Method for calculating the hue of the base sheet> The hue of the base sheet is classified into B hue, PB hue, BG hue, or other hues, and the average value of the hue is calculated for each classification and defined as the "hue of the base sheet." <Method for calculating the brightness of the base sheet> The lightness of the base sheet is calculated by taking the average value of the lightness at all measurement points, without distinguishing between B hue, PB hue, BG hue, or other hues, and this is defined as the "lightness of the base sheet." <Method for calculating the saturation of the base sheet> The saturation of the base sheet is calculated by taking the average value of the saturation at all measurement points, without distinguishing between B hue, PB hue, BG hue, or other hues, and this is defined as the "saturation of the base sheet."

[0021] For substrate sheets impregnated with liquid, measurements will be performed using substrate sheets dried by the following drying method, in order to suppress color changes. <Drying method for liquid-impregnated sheets> Drying is performed by thoroughly squeezing the liquid-impregnated sheet by hand to remove water, and then hanging it to dry in a room at a temperature of 20±2℃ and a relative humidity of 65±4% for at least one hour. After measuring the mass of the first sheet, the sheet is dried for another hour under the same conditions, and then the mass of the second sheet is measured. The second measurement A2 is compared with the first measurement A1, and if the mass difference (%) calculated by the following formula (1) is 0.1% or less, the sheet is considered to be sufficiently dry. Mass difference (%)=[(A1-A2) / A1]×100...(1) If the mass difference (%) exceeds 0.1%, drying is performed for another hour under the same conditions, and a third mass measurement is taken after drying. The third measurement is designated as A2 and the second measurement as A1, and the mass difference (%) is calculated according to formula (1). If it is 0.1% or less, the sheet is considered sufficiently dried. On the other hand, if it exceeds 0.1%, drying is performed for another hour under the same conditions, and the mass difference after drying is checked. This drying process is repeated until the mass difference (%) becomes 0.1% or less.

[0022] In the present invention, the base sheet satisfies one of the following conditions 1 to 3 in terms of hue, lightness, and saturation, respectively. Condition 1: Hue 0.1B or higher and 10B or lower, lightness 6.0 or higher and less than 10, saturation 1 or higher. Condition 2: Hue 0.1 PB or higher and 7.4 PB or lower, lightness 8.0 or higher and less than 10, saturation 1 or higher. Condition 3: Hue 0.1BG or higher and 10BG or lower, lightness 8.0 or higher and less than 10, saturation 1 or higher. Furthermore, the saturation is limited to the maximum saturation achievable through the combination of hue and lightness.

[0023] In this specification, when referring to a hue range of "greater than or equal to numerical value A and less than or equal to numerical value B," the upper and lower limits, numerical values ​​A and B, are included. For example, "greater than or equal to 0.1B and less than or equal to 10B" means the range from 0.1B to 10B when viewing the Munsell color circle clockwise, and includes the values ​​at both ends, 0.1B and 10B.

[0024] Colors can evoke a variety of impressions and emotions through visual perception. For example, blue tones generally evoke cool impressions such as calmness, composure, trust, sincerity, and intelligence. It is well known that changing lipstick color can alter one's facial appearance. However, it is not common practice to change the color of the liquid-impregnated sheet 1, which is attached to the neck, a part of the body other than the face, in order to alter the appearance of the face. As a result of various studies conducted by the inventors, they diligently researched how a liquid-impregnated sheet 1 used for cooling the neck can improve the appearance of the face. They discovered that using a specific shade of blue as the color of the liquid-impregnated sheet 1 of the present invention can give the face a more vibrant appearance when worn around the neck. More specifically, they discovered that wearing a liquid-impregnated sheet 1 having a base sheet whose hue, lightness, and saturation in the Munsell color system satisfy any of the above conditions 1 to 3 around the neck can give the face a more vibrant appearance. Thus, wearing the liquid-impregnated sheet 1 of the present invention around the neck can improve the vibrancy and refreshment of the face. The above conditions 1 to 3 were derived from the inventors' many years of research and extensive experiments. A vibrant facial appearance means a healthy complexion, and a refreshed facial appearance means a clear, radiant complexion. Furthermore, as shown in Figure 2, the liquid-impregnated sheet 1 of the present invention can be easily attached to the neck by simply placing the central region A around the neck and then connecting the side regions B and C. It offers excellent wearability and can be stably held in an appropriate position that can improve facial appearance. Thus, the liquid-impregnated sheet 1 of the present invention can effectively improve the overall impression of the face through the synergistic effect of being able to give the face a lively impression and being able to be stably held in an appropriate position that can improve the face impression.

[0025] From the viewpoint of further enhancing the liveliness and refreshment of the facial impression, it is preferable that the hue, brightness, and saturation of condition 1 are within the following ranges. When the lightness is set to 6.0 or higher and less than 10, and the saturation is set to 1 or higher, the hue is preferably 0.1B or higher, more preferably 5.0B or higher, even more preferably 6.0B or higher, preferably 10.0B or lower, more preferably 9.0B or lower, even more preferably 7.0B or lower, preferably 0.1B or higher and 10.0B or lower, more preferably 5.0B or higher and 9.0B or lower, even more preferably 6.0B or higher and 9.0B or lower, and even more preferably 6.0B or higher and 7.0B or lower. When the hue is set to 0.1B or more and 10B or less, and the saturation is set to 1 or more, the lightness is preferably 6.0 or more, more preferably 7.0 or more, even more preferably 8.0 or more, preferably less than 10.0, preferably 6.0 or more and less than 10.0, more preferably 7.0 or more and less than 10.0, and even more preferably 8.0 or more and less than 10.0. When the hue is set to 0.1B or more and 10B or less, and the lightness is set to 6.0 or more and less than 10, the saturation is preferably 1.0 or more, more preferably 2.0 or more, preferably 20.0 or less, more preferably 10.0 or less, even more preferably 3.0 or less, preferably 1.0 or more and 20.0 or less, more preferably 2.0 or more and 10.0 or less, and even more preferably 2.0 or more and 3.0 or less.

[0026] From the viewpoint of further enhancing the liveliness and refreshment of the facial impression, it is preferable that the hue, brightness, and saturation of condition 2 are within the following ranges. When the lightness is set to 8.0 or more and less than 10, and the saturation is set to 1 or more, the hue is preferably 0.1 PB or more, more preferably 7.4 PB or less, even more preferably 5.0 PB or less, even more preferably 3.0 PB or less, even more preferably 1.0 PB or less, preferably 0.1 PB or more and 7.4 PB or less, more preferably 0.1 PB or more and 5.0 PB or less, even more preferably 0.1 PB or more and 3.0 PB or less, and even more preferably 0.1 PB or more and 1.0 PB or less. When the hue is set to 0.1 PB or more and 7.4 PB or less, and the saturation is set to 1 or more, the lightness is preferably 8.0 or more, preferably less than 10.0, and preferably 8.0 or more and less than 10.0. When the hue is set to 0.1 PB or more and 7.4 PB or less, and the lightness is set to 8.0 or more and less than 10, the saturation is preferably 1.0 or more, more preferably 2.0 or more, preferably 50 or less, more preferably 20 or less, even more preferably 3.0 or less, even more preferably 1.0 or more and 50 or less, even more preferably 2.0 or more and 20 or less, and even more preferably 2.0 or more and 3.0 or less.

[0027] From the viewpoint of further enhancing the liveliness and refreshment of the facial impression, it is preferable that the hue, brightness, and saturation of condition 3 are within the following ranges. When the lightness is set to 8.0 or higher and less than 10, and the saturation is set to 1 or higher, the hue is preferably 0.1BG or higher, more preferably 1.0BG or higher, even more preferably 5.0BG or higher, even more preferably 9.0BG or higher, preferably 10.0BG or lower, preferably 0.1BG or higher and 10.0BG or lower, more preferably 1.0BG or higher and 10.0BG or lower, even more preferably 5.0BG or higher and 10.0BG or lower, and even more preferably 9.0BG or higher and 10.0BG or lower. When the hue is set to 0.1BG or more and 10BG or less, and the saturation is set to 1 or more, the lightness is preferably 8.0 or more, preferably less than 10.0, and preferably 8.0 or more and less than 10.0. When the hue is set to 0.1 BG or more and 10 BG or less, and the lightness is set to 8.0 or more and less than 10, the saturation is preferably 1.0 or more, more preferably 2.0 or more, preferably 32.0 or less, more preferably 15.0 or less, more preferably 3.0 or less, more preferably 1.0 or more and 32.0 or less, more preferably 2.0 or more and 15.0 or less, and still more preferably 2.0 or more and 3.0 or less.

[0028] From the viewpoint of further improving the liveliness and refreshment of the facial impression, it is even more preferable that the color of the base sheet, as shown in the Munsell color system, satisfies condition 1 above and also satisfies the following condition 4. Condition 4: Hue 5B or higher and 10B or lower, lightness 6.5 or higher and less than 10, saturation 1.8 or higher.

[0029] From the viewpoint of further enhancing the liveliness and refreshment of the facial impression, assuming that condition 1 is met, it is preferable that the hue, lightness, and saturation of condition 4 are within the following ranges. When the lightness is 6.5 or more and less than 10, and the saturation is 1.8 or more, the hue is preferably 5.0B or more, more preferably 6.0B or more, preferably 10.0B or less, more preferably 9.0B or less, even more preferably 7.0B or less, preferably 5.0B or more and 10.0B or less, more preferably 5.0B or more and 9.0B or less, even more preferably 6.0B or more and 9.0B or less, and even more preferably 6.0B or more and 7.0B or less. When the hue is set to 5B or more and 10B or less, and the saturation is set to 1.8 or more, the lightness is preferably 6.5 or more, more preferably 7.0 or more, even more preferably 8.0 or more, preferably less than 10.0, preferably 6.5 or more and less than 10.0, more preferably 7.0 or more and less than 10.0, and even more preferably 8.0 or more and less than 10.0. When the hue is set to 5B or more and 10B or less, and the lightness is set to 6.5 or more and less than 10, the saturation is preferably 1.8 or more, more preferably 2.0 or more, preferably 20.0 or less, more preferably 10.0 or less, and still preferably 3.0 or less, preferably 1.8 or more and 20.0 or less, more preferably 2.0 or more and 10.0 or less, and still still preferably 2.0 or more and 3.0 or less.

[0030] The liquid-impregnated sheet 1 has a length in the longitudinal direction X of preferably 28 cm or more, more preferably 37 cm or more, and even more preferably 46 cm or more, from the viewpoint of securing the lateral regions B and C that are joined together in addition to the central region A that is in contact with the neck, and from the viewpoint of further expressing a lively and refreshing impression of the face. There is no particular upper limit to the length in the longitudinal direction X, but for example, if it is too long, the wearability around the neck may decrease and portability may worsen, so from the viewpoint of ease of wrapping around the neck and improved handling, it is preferably 90 cm or less, and more preferably 70 cm or less.

[0031] From the viewpoint of further improving the liveliness and refreshing feeling of the face, it is preferable that the liquid-impregnated sheet 1 be in contact with the neck area with a certain width. From this viewpoint, the length L2 in the shorter direction Y of the liquid-impregnated sheet 1 is preferably 5 cm or more, more preferably 10 cm or more. Furthermore, from the viewpoint of fitting to the neck, the length L2 in the shorter direction Y is preferably 30 cm or less, more preferably 25 cm or less.

[0032] The standard neck circumference for children is approximately 27.5 cm for 8-year-old boys and approximately 26 cm for 8-year-old girls. From the viewpoint of ensuring sufficient length of the central region A as the area that contacts the neck, ensuring sufficient length of the lateral regions B and C that connect to each other, and further improving the liveliness and refreshment of the facial impression, the length of the longitudinal direction X of the liquid-impregnated sheet 1 for children is preferably 28 cm or more, more preferably 37 cm or more. From the viewpoint of further improving the liveliness and refreshment of the facial impression, the length L2 of the short direction Y of the liquid-impregnated sheet 1 for children is preferably 5 cm or more, more preferably 10 cm or more. The standard neck circumference for adults is approximately 37 cm for 30-year-old men and approximately 32 cm for 30-year-old women. From the viewpoint of ensuring sufficient length of the central region A as the area that contacts the neck, ensuring sufficient length of the lateral regions B and C that connect to each other, and further improving the liveliness and refreshment of the facial impression, the liquid-impregnated sheet 1 for adults is preferably 37 cm or more, more preferably 46 cm or more. From the viewpoint of further improving the liveliness and refreshment of the facial impression, the length L2 in the shorter direction Y of the liquid-impregnated sheet 1 for adults is preferably 5 cm or more, more preferably 10 cm or more.

[0033] The liquid-impregnated sheet 1 preferably has perforations 2 in the central region A. The central region A is the region intended to come into contact with the neck, but since there are differences in the neck circumference of wearers due to age and individual differences, even with the same liquid-impregnated sheet 1, the length that comes into contact with the neck will vary depending on the wearer. Therefore, in the present invention, the central region A is defined as the region on both sides of the central position Cx in the longitudinal direction X of the liquid-impregnated sheet 1, where the distance L3 from the central position Cx is within 15 cm. Here, the central region A is a region with a length La in the longitudinal direction X of 30 cm, and the center position that divides this length La in half coincides with the central position Cx of the liquid-impregnated sheet 1. The central position Cx in the longitudinal direction X of the liquid-impregnated sheet 1 is the position that divides the length L1 in the longitudinal direction X of the liquid-impregnated sheet 1 in half. Furthermore, if the area is clearly positioned around the neck, the central area A is not limited to areas where the distance L3 from the central position Cx is within 15 cm on each side of the central position Cx.

[0034] The liquid-impregnated sheet 1 of the present invention preferably has at least one perforation 2 in the central region A, and more preferably has multiple perforations 2. The perforations 2 are designed to allow the liquid-impregnated sheet 1 to be torn by hand without the use of tools, and to be divided along the longitudinal direction X, at the position where the perforations 2 are formed along the longitudinal direction X. Preferably, the length of the perforations 2 at the position where the perforations 2 are formed along the longitudinal direction X is 90% or more, more preferably 95%, and even more preferably 100%, when the length of the short side of the sheet from one edge 1a to the other edge 1b along the longitudinal direction X is taken as 100%. The perforations 2 may be parallel to the longitudinal center line Ly extending in the short direction Y, or they may have a slight incline, for example, an incline of 30% or less. However, it is preferable that the perforations 2 be parallel to the longitudinal center line Ly, from the viewpoint of making it easier to tear the liquid-impregnated sheet 1 at the perforations 2, even when the liquid-impregnated sheet 1 is folded in two, three, four, etc., along the fold line extending in the longitudinal direction X.

[0035] The scenario in which the liquid-impregnated sheet 1 is released by tearing the perforations 2 is typically when the wearer or a guardian intentionally removes it. For example, this could occur if the side regions B and C are connected but the connection cannot be easily released, or if the liquid-impregnated sheet 1 needs to be removed more quickly than the side regions B and C can be released due to various circumstances such as the sheet tightening around the neck. The scenario in which the perforations 2 are broken and the liquid-impregnated sheet 1 is released is not limited to situations where it is intentionally removed. For example, while the liquid-impregnated sheet 1 is worn around the neck during activities, it may get caught on an unexpected obstacle such as a fence, playground equipment, a seat, or a part of another person's body. In such a case, it is desirable from the standpoint of mitigating or preventing the wearer's neck from becoming constricted and harming their health if the perforations 2 are broken and the liquid-impregnated sheet 1 is released, regardless of the wearer's or another person's intentions.

[0036] The liquid-impregnated sheet 1 is used by wrapping it around the neck after the base sheet has been impregnated with liquid. The liquid impregnated in the base sheet is preferably a water-containing liquid. The water-containing liquid is either water or has water as its main component. The water-containing liquid has a water content of at least 50% by mass of the total mass of the liquid, preferably 55% by mass or more, more preferably 60% by mass or more, and even more preferably 65% ​​by mass or more. The liquid-impregnated sheet 1 is preferably used for cooling around the neck. If the liquid-impregnated sheet 1 is used for cooling around the neck, the base sheet only needs to contain a liquid containing at least water, but from the viewpoint of providing a cooling sensation, it is preferable that the liquid impregnated in the base sheet contains a cooling component. Examples of cooling ingredients include menthol or its derivatives such as l-menthol, menthyl acetate, menthyl lactate, l-menthyl glyceryl ether, and menthylpyrrolidone carboxylic acid; menthol analogs such as N-ethyl-p-menthanecarboxamide; dl-camphor, isopulegol, cineole, borneol, thymol and their derivatives, as well as 3-l-methoxypropanediol and menthol-containing essential oils such as peppermint oil and spearmint oil. In addition to its function as a cooling ingredient, the cooling ingredient may also have other functions, such as a fragrance.

[0037] From the viewpoint of enhancing the cooling sensation and / or its duration, the content of the cooling component in the liquid is preferably 0.015% by mass or more, more preferably 0.04% by mass or more, and even more preferably 0.05% by mass or more, relative to the total amount of liquid. Furthermore, from the viewpoint of suppressing irritation when worn around the neck for a predetermined period of time, it is preferably 0.7% by mass or less, more preferably 0.6% by mass or less, and even more preferably 0.5% by mass or less. The liquid impregnated into the base sheet may contain components other than water and a cooling agent. For example, it may be a cosmetic composition containing a cooling agent, ethanol, and water, as described in Japanese Patent Publication No. 2021-88547.

[0038] From the viewpoint of providing a cooling sensation, the liquid-impregnated sheet 1 preferably has an impregnation rate of 270% by mass or more, more preferably 300% by mass or more, and even more preferably 330% by mass or more. From the viewpoint of preventing dripping, the liquid-impregnated sheet 1 preferably has an impregnation rate of the liquid of 1000% by mass or less, more preferably 950% by mass or less, and even more preferably 900% by mass or less. From the viewpoint of providing a cooling sensation and preventing dripping, the impregnation rate of the liquid is preferably 270% by mass or more and 1000% by mass or less, more preferably 300% by mass or more and 950% by mass or less, and even more preferably 330% by mass or more and 900% by mass or less. The liquid impregnation rate (mass %) is the ratio of the mass of the liquid to the mass of the base sheet, expressed as a percentage. In other words, the liquid impregnation rate is the percentage increase in mass of the base sheet after it has been impregnated with the liquid, compared to before impregnation.

[0039] The liquid impregnation rate can be measured specifically as follows: <Method for measuring liquid impregnation rate> First, measure the mass a of the liquid-impregnated sheet 1. From the viewpoint of preventing the mass a from changing due to the evaporation of the liquid impregnated in the liquid-impregnated sheet 1, it is preferable that the liquid-impregnated sheet 1 used for measuring the mass a is one that has just been manufactured. If the liquid-impregnated sheet 1 is sealed in a packaging bag or the like after manufacturing and stored in that state, it is preferable to measure the mass a immediately after removing the liquid-impregnated sheet 1 from the packaging bag or the like. Next, the liquid-impregnated sheet 1 is thoroughly washed with water and dried, and then the mass of the sheet is measured for the first time. The sheet is dried by squeezing it well by hand to remove water, and then hanging it to dry in a room at a temperature of 20±2℃ and a relative humidity of 65±4% for at least one hour. After measuring the mass of the sheet for the first time, the sheet is dried for another hour under the same conditions, and then the mass of the sheet is measured for the second time. The second measurement value W2 is compared with the first measurement value W1, and if the mass difference (%) calculated by the following formula (2) is 0.1% or less, the second measurement value W2 is taken as the mass b of the sheet after drying. Mass difference (%)=[(W1-W2) / W1]×100...(2)

[0040] If the mass difference (%) is greater than 0.1%, the sheet is dried for another hour under the same conditions, and the mass is measured a third time after drying. The third measurement is taken as W2 and the second measurement as W1, and the mass difference (%) is calculated according to formula (1). If it is 0.1% or less, the mass of the sheet after drying is taken as the third measurement W2. On the other hand, if it is greater than 0.1%, the sheet is dried for another hour under the same conditions, and the mass difference after drying is checked. In this manner, drying is repeated until the mass difference (%) becomes 0.1% or less, and the measured mass at the Nth measurement when the mass difference becomes 0.1% or less is defined as the dried mass b. The dried mass b corresponds to the mass of the base sheet mentioned above. Then, the liquid impregnation rate is calculated from the mass a of the liquid-impregnated sheet 1 (the sheet in the state of being impregnated with liquid) and the mass b after drying using the following formula (3). Liquid impregnation rate (%) = (ab) / b × 100 ... (3)

[0041] The liquid-impregnated sheet 1 is preferably distributed to the market as a sealed package sealed in a sealed container so that the liquid-impregnated state is maintained for a long period of time. The sealed container may be a bag container made of flexible packaging material such as a three-sided bag with a zipper or a pillow container, or it may be a packaging container made of a resin molded body. Examples of packaging containers made of resin molded bodies include cylindrical or rectangular tubular containers that allow multiple sheets contained inside to be pulled out and have an opening that can be opened and closed by a lid. The liquid-impregnated sheet 1 contained in the sealed container may be in any state, for example, a stack of sheets in an unfolded state, a stack of sheets or a single sheet that is folded, rolled up, or rolled up after being folded. Methods of folding the sheet include folding it in half, in thirds, or in quarters, or folding it in half, in thirds, or in quarters in one direction and then folding it in half, in thirds, or in quarters in a direction perpendicular to that direction.

[0042] The present invention is not limited to the embodiments described above and can be modified as appropriate. For example, as a method for connecting the side regions B and C, a method of connecting them together may be adopted. When connecting side regions B and C, various known knots can be used without particular restriction, such as the bow knot, ribbon knot, square knot, single splice (loom knot), fishing line knot (fisherman's knot), and figure-eight knot.

[0043] Furthermore, the planar shape of the liquid-impregnated sheet may be any shape having a longitudinal direction X and a transverse direction Y. This may be a rectangle with a long side and a transverse side shorter than the long side, or a rectangle with both ends or four corners in the longitudinal direction being arc-shaped, an ellipse with a major axis and a transverse axis shorter than the major axis, or a rectangle with semicircles added to both ends. From the viewpoint of ease of manufacturing and / or handling, a rectangular planar shape is preferred.

[0044] Furthermore, instead of attaching the liquid-impregnated sheet 1 around the neck in an unfolded state, it may be attached in a folded state, such as a two-fold, three-fold, or four-fold, along a fold line extending in the longitudinal direction X. In this case, it is preferable to attach it so that the colored sheet is visible to a third party. [Examples]

[0045] The present invention will be described in more detail below with reference to examples. However, the scope of the present invention is not limited to these examples. [Examples 1, 3 and Comparative Examples 1 to 3] The base sheet has a structure in which two layers of white nonwoven fabric made of rayon fibers are laminated on both sides of a white nonwoven fabric made of pulp fibers, with a basis weight of 60 g / m². 2 A nonwoven fabric with a three-layer structure was used, which was then colored by spraying it with a coloring agent. [Example 2] The base sheet has a three-layer structure consisting of a colored nonwoven fabric made of polypropylene fibers laminated on both sides with two white nonwoven fabrics made of rayon fibers, with a basis weight of 60 g / m². 2 Nonwoven fabric was used. The color of the substrate sheets for each example and comparative example was measured using the method described above. The hue, lightness, and saturation of the substrate sheets were also calculated using the method described above. These results are shown in Table 1.

[0046] [Facial impression when liquid-impregnated sheet 1 is wrapped around the neck (vibrancy and refreshment)] Liquid-impregnated sheets having the same configuration as the embodiment shown in Figure 1 were prepared by impregnating the base sheets of each example and comparative example with liquid. Water was used as the liquid. Five Japanese female expert panelists aged 28 to 48 wore the liquid-impregnated sheets and evaluated their own facial impression (vibrancy and refreshment) based on the evaluation criteria below. The average score of the five expert panelists was calculated, and the facial impression when the liquid-impregnated sheet was wrapped around the neck was evaluated based on the evaluation score below. An evaluation score of C or higher is considered passing. (Evaluation Criteria) 6: I strongly feel that way. 5: I feel that way 4: I somewhat feel that way. 3: I can't say either way. 2: I don't really feel that way. 1: I don't feel that way. (Evaluation score) A: Average value of 6 or higher B: Average value 5 or higher but less than 6 C: Average value 4 or higher but less than 5 D: Average value 3 or more and less than 4 E: Average value 2 or greater but less than 3 F: Average value less than 2

[0047] [Table 1]

[0048] As is clear from the results shown in Table 1, the liquid-impregnated sheets of each example improve the liveliness and refreshment of the facial appearance. [Explanation of symbols]

[0049] 1. Liquid-impregnated sheet 2 perforations 5 hole

Claims

1. A liquid-impregnated sheet having a base sheet containing a fibrous material, wherein the base sheet is impregnated with a liquid and used by being wrapped around the neck, The aforementioned base sheet is a liquid-impregnated sheet whose color, as expressed in the Munsell color system, satisfies any of the following conditions 1 to 3. Condition 1. Hue 0.1B or higher and 10B or lower, lightness 6.0 or higher and less than 10, saturation 1 or higher. Condition 2: Hue 0.1 PB or higher and 7.4 PB or lower, lightness 8.0 or higher and less than 10, saturation 1 or higher. Condition 3: Hue 0.1 BG or higher and 10 BG or lower, lightness 8.0 or higher and less than 10, saturation 1 or higher.

2. The liquid-impregnated sheet according to claim 1, wherein the color shown in the Munsell color system satisfies both condition 1 above and condition 4 below. Condition 4. Hue 5B or higher and 10B or lower, lightness 6.5 or higher and less than 10, saturation 1.8 or higher.

3. Having a longitudinal direction and a transverse direction, The liquid-impregnated sheet according to claim 1, wherein the length in the longitudinal direction is 28 cm or more and the length in the short direction is 5 cm or more.

4. The liquid-impregnated sheet according to claim 1 or 2, wherein the liquid contains a cooling component.

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