Nonwoven laminate sheet

Abstract

To provide a nonwoven laminate sheet for body-wiping sheets that ensures excellent heat retention and user comfort during use in a wet state.SOLUTION: Provided is a nonwoven laminate sheet with a basis weight ranging from 100 to 300 g / m2, including at least an intermediate layer comprising airlaid nonwoven fabric and surface layers bonded to both sides of the intermediate layer via an adhesive, wherein the intermediate layer contains thermally adhesive fibers and at least 62 mass% of cellulose-based fibers based on the total mass of the intermediate layer, and the intermediate layer has a greater water retention capability than the surface layers.SELECTED DRAWING: None

Description

[Technical field]

[0001] The present invention relates to a nonwoven fabric laminated sheet, more specifically to a nonwoven fabric laminated sheet that has good water retention capacity and is excellent in heat retention and usability when used in a wet state. [Background technology]

[0002] A moistened body-cleaning sheet impregnated with an aqueous solution is known. Applications of this moistened body-cleaning sheet include wiping the bodies of hospitalized patients and residents of nursing homes who have difficulty bathing, and the body-cleaning sheet is pre-warmed before use to avoid cold irritation. Generally, the body-cleaning sheet has a basis weight of 25 to 100 g / m, as described in Patent Document 1 (JP Patent Publication 2009-11702). 2 However, even if the nonwoven fabric is pre-heated in roll form, it quickly cools down when it is unrolled for use.

[0003] Patent Document 2 (JP Patent Publication 2004-313557 A) discloses a body cleaning sheet made of a nonwoven fabric laminate sheet using a nonwoven fabric containing a water-absorbent polymer compound to enhance heat retention after heating. The water-absorbent polymer compound absorbs an aqueous detergent and swells, and can hold a large amount of aqueous detergent in the absorbent polymer compound, so that when heated, high heat retention is maintained by the moisture in the heated water-washing detergent. However, when the water-absorbent polymer compound swells due to absorption of water, it falls off from the nonwoven fabric laminate sheet that is the support, so that, for example, a surface layer is placed on both sides of the inner layer, and the nonwoven fabric containing the water-absorbent polymer compound is completely covered on both the upper and lower sides with another nonwoven fabric that becomes the surface layer, and there is a problem that productivity is significantly reduced. In addition, when the water-absorbent polymer compound is stored for a long period of time in a state where the aqueous detergent is absorbed in the water-absorbent polymer compound, there is a concern that the polymer compound itself will flow out, and such a body cleaning sheet cannot provide sufficient heat retention and a good feeling of use.

[0004] Patent Document 3 (International Publication WO 2007 / 135862) describes a skin cleansing sheet having a web layer produced by an airlaid method that contains a specific amount of thermally adhesive fiber having a specific fineness and cellulosic pulp, but such a skin cleansing sheet does not provide sufficient heat retention. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] JP 2009-11702 A [Patent Document 2] JP 2004-313557 A [Patent Document 3] International Publication No. 2007 / 135862 Brochure Summary of the Invention [Problem to be solved by the invention]

[0006] An object of the present invention is to provide a nonwoven fabric laminated sheet which has good water retention capacity, excellent heat retention and excellent feel when used in a wet state, and is suitable for use as a body cleaning sheet. [Means for solving the problem]

[0007] The above problems can be solved by the following invention.

[0008] A nonwoven fabric having at least an intermediate layer containing an airlaid nonwoven fabric and surface layers bonded to both sides of the intermediate layer via an adhesive component, the basis weight being 100 to 300 g / m 2 The nonwoven fabric laminate sheet according to claim 1, wherein the intermediate layer contains a thermal adhesive fiber and 62 mass% or more of a cellulosic fiber based on the total mass of the intermediate layer, and the water retention capacity of the intermediate layer is higher than that of the surface layer. Effect of the Invention

[0009] According to the present invention, it is possible to provide a nonwoven fabric laminated sheet which has good water retention capacity, excellent heat retention properties and excellent feel when used in a wet state, and is suitable for use as a body cleaning sheet. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] The nonwoven fabric laminated sheet of the present invention has an intermediate layer containing an airlaid nonwoven fabric formed by an airlaid method. The airlaid method generally includes a step of dry disintegrating and mixing raw fibers to form a fiber web, a step of spraying an aqueous adhesive as a binder onto the fiber web, and a dry heating step of bonding the fibers of the fiber web with the aqueous adhesive. In the airlaid method, when the raw fibers contain thermally adhesive fibers, the fibers of the fiber web can be bonded to each other by melt adhesion of the thermally adhesive fibers in the dry heating step without spraying the aqueous adhesive. The thermally adhesive fibers and the aqueous adhesive can be sprayed together. The intermediate layer may contain a nonwoven fabric other than the airlaid nonwoven fabric, but the proportion of the airlaid nonwoven fabric in the intermediate layer is preferably 80% by volume or more, more preferably 90% by volume or more, and even more preferably 95% by volume.

[0011] In the present invention, the intermediate layer of the nonwoven fabric laminated sheet contains a thermal adhesive fiber. As the thermal adhesive fiber contained in the intermediate layer, a core-sheath composite type or an eccentric side-by-side type thermal adhesive composite synthetic fiber can be particularly preferably used. Examples of polymers constituting the sheath portion or the outer peripheral portion of the fiber include polyethylene and polypropylene. As the polymer constituting the core component or the inner layer portion of the fiber, a polymer having a higher melting point than the sheath portion or the outer peripheral portion of the fiber and not showing a large change at the dry heating temperature is used. Examples of the combinations as described above include polyethylene / polypropylene, polyethylene / polyester, polypropylene / polyester, etc. (Note that these do not include the splittable composite fiber described later). These polymers may be modified within a range that does not inhibit the function as a thermal adhesive fiber. From the viewpoint of achieving both a good feeling of use and sufficient strength and flexibility, the thermal adhesive fiber contained in the intermediate layer of the nonwoven fabric laminated sheet of the present invention is preferably contained in a ratio of 10 to 45% by mass, more preferably 15 to 40% by mass, relative to the airlaid nonwoven fabric constituting the intermediate layer. If the intermediate layer of the nonwoven fabric laminated sheet of the present invention contains less than 10% by mass of thermal adhesive fiber, it may be difficult to achieve both sufficient strength and flexibility, and the feeling of use may be poor.If the intermediate layer of the nonwoven fabric laminated sheet of the present invention contains more than 45% by mass of thermal adhesive fiber, the flexibility may be low and the feeling of use may be poor.

[0012] The intermediate layer of the nonwoven fabric laminated sheet of the present invention contains cellulosic fibers. Cellulosic fibers have hydrophilic groups such as hydroxyl groups and carboxyl groups, and exhibit high hydrophilicity and water retention. As the cellulosic fibers, wood pulp made from coniferous or broad-leaved trees, non-wood pulp made from rags, linters, linen, straw, bagasse, kenaf, etc., pulp fibers obtained by disintegrating waste paper pulp, etc., natural fibers such as cotton and hemp, regenerated cellulose fibers such as rayon, lyocell, and cupra, and semi-synthetic fibers such as acetate fibers and triacetate fibers can be used. As the cellulosic fibers contained in the intermediate layer of the nonwoven fabric laminated sheet of the present invention, pulp fibers are preferably used in view of the balance between cost and water retention. Two or more types of the above cellulosic fibers can be used in combination. The cellulosic fibers contained in the intermediate layer of the nonwoven fabric laminated sheet of the present invention are 62% by mass or more, preferably 62 to 90% by mass or more, based on the total mass of the intermediate layer. If the ratio of cellulosic fibers is less than 62% by mass, the water retention capacity is insufficient and the amount of water that can be absorbed is insufficient, so when it is heated in a wet state and used as a body cleaning sheet, the heat retention is insufficient. Also, if the ratio of cellulosic fibers is more than 90% by mass, the strength of the middle layer is insufficient, and the wiping comfort may be inferior.

[0013] The intermediate layer of the nonwoven fabric laminated sheet of the present invention may contain fibers other than thermal adhesive fibers and cellulosic fibers. Examples of fibers other than thermal adhesive fibers and cellulosic fibers include thermoplastic fibers, such as monofibers of polyester, polyamide, polyacrylonitrile, polyethylene, polypropylene, polyurethane, ethylene vinyl alcohol copolymer, polylactic acid, polybutylene succinate, and other composite fibers, such as polyester / polypropylene splittable composite fibers, polyester / polyethylene splittable composite fibers, and polypropylene / polyethylene splittable composite fibers. Two or more of the above thermoplastic fibers may be used in combination. When fibers other than thermal adhesive fibers and cellulosic fibers are contained, the amount is preferably 10% by mass or less relative to the airlaid nonwoven fabric formed by the airlaid method.

[0014] The intermediate layer of the nonwoven fabric laminated sheet of the present invention may contain an aqueous adhesive. Examples of the aqueous adhesive include aqueous solution type adhesives such as casein, sodium alginate, hydroxyethyl cellulose, sodium carboxymethyl cellulose, polyvinyl alcohol, and sodium polyacrylate, and emulsion type aqueous adhesives such as polyacrylic acid ester, acrylic-styrene copolymer, polyvinyl acetate, ethylene-vinyl acetate copolymer, acrylonitrile-butadiene copolymer, methyl methacrylate-butadiene copolymer, and styrene-butadiene copolymer latex. Although the inclusion of an aqueous adhesive is not essential, if it is contained, it is preferably 10% by mass or less relative to the airlaid nonwoven fabric formed by the airlaid method. If the content of the aqueous adhesive exceeds 10% by mass, the flexibility of the nonwoven fabric laminated sheet may be reduced and a good feeling of use may not be obtained.

[0015] The air-laid nonwoven fabric as the intermediate layer of the nonwoven fabric laminated sheet of the present invention may contain various inorganic particles, organic polymer particles, etc., within the range that does not impair the performance as an intermediate layer.

[0016] The nonwoven fabric laminated sheet of the present invention has at least a surface layer arranged on both sides of the intermediate layer. The surface layer of the nonwoven fabric laminated sheet of the present invention can be suitably made of a nonwoven fabric formed by a spunlace method or a spunbond method. In particular, it is preferable to use a nonwoven fabric formed by a spunlace method. In the spunlace method, there are a dry method in which defibrated and mixed fibers are formed into a fiber web by a parallel method or a cross method using a carding machine and a wrapper, and a wet method in which defibrated and mixed fibers in water are dehydrated on a mesh such as a cylinder or a long net to form a fiber web. By spraying a high-pressure jet water flow onto the fiber web formed by the dry method or the wet method, three-dimensional entanglement of the fibers is formed, and by heating and drying, a nonwoven fabric that does not contain chemical components that act as binders can be obtained. As with general body cleansing sheets, in order to avoid sensitization to the skin due to chemical components, a nonwoven fabric formed by a binder-free spunlace method can also be suitably used for the surface layer of the nonwoven fabric laminated sheet of the present invention.

[0017] The surface layer of the nonwoven fabric laminated sheet of the present invention may contain cellulose-based fibers or thermoplastic fibers. In particular, from the viewpoint of obtaining a good feeling of use, it is preferable that the surface layer contains thermoplastic fibers, and the content of the thermoplastic fibers is preferably 15% by mass or more of the fibers contained in the surface layer. As the cellulose-based fibers, for example, natural fibers such as pulp fibers, cotton, and hemp, regenerated cellulose fibers such as rayon fibers, lyocell fibers, and cupra fibers, and semi-synthetic fibers such as acetate fibers and triacetate fibers can be used. Two or more types of the above cellulose-based fibers can be used in combination. As the thermoplastic fibers, for example, single fibers such as polyester, polyamide, polyacrylonitrile, polyethylene, polyethylene terephthalate, polypropylene, polyurethane, ethylene vinyl alcohol copolymer, polylactic acid, and polybutylene succinate, and composite fibers such as polyester / polypropylene splittable composite fibers, polyester / polyethylene splittable composite fibers, and polypropylene / polyethylene splittable composite fibers can be used. Two or more types of the above thermoplastic fibers can be used in combination.

[0018] The surface layer of the nonwoven fabric laminate sheet of the present invention may contain other fibers, such as thermally adhesive fibers, such as core-sheath type or eccentric side-by-side type thermally adhesive composite synthetic fibers.

[0019] The nonwoven fabric laminate sheet of the present invention is characterized in that the intermediate layer and the surface layers arranged on both sides of the intermediate layer are bonded to the intermediate layer via an adhesive component. As a method for forming a nonwoven fabric laminate sheet from a plurality of different nonwoven fabric webs, for example, as described in JP 2017-119931 A, a method of laminating by a method of forming three-dimensional entanglement of fibers by high-pressure water jet processing such as a water jet (so-called water flow entanglement method) is generally known, but there is a problem that the functions of each layer become unclear and the functionality expressed is limited due to significant intermixing between layers. The nonwoven fabric laminate sheet of the present invention is characterized in that the nonwoven fabric webs are bonded to each other via an adhesive component to obtain a laminate sheet without actively utilizing the entanglement of fibers between each layer. As the adhesive component, for example, so-called binder resins such as hot melt adhesives, latex adhesives, and emulsion adhesives can be used, and various resins such as polyolefins, synthetic rubbers, polyvinyl acetates, polyamides, polyesters, and polyurethanes can be suitably used. The amount of adhesive component contained in the nonwoven fabric laminate sheet of the present invention is 3 to 15 g / m on one surface that joins the intermediate layer and the surface layer. 2 It is preferable that the amount of adhesive component is 3 g / m 2 If the amount of adhesive component is less than 15 g / m, the nonwoven fabric laminate sheet may not have adequate strength and may be inferior in feel. 2 If it exceeds this value, the nonwoven fabric laminate sheet itself will have high stiffness and low flexibility, which may result in poor usability.

[0020] The basis weight of the nonwoven fabric laminated sheet of the present invention is 100 to 300 g / m 2 More preferably, the thickness is 150 to 300 g / m 2 The basis weight of the nonwoven fabric laminate sheet is 100 g / m 2 When the nonwoven fabric laminated sheet had a basis weight of less than 300 g / m2, the feeling of use was sometimes poor in terms of wiping comfort when used as a body cleaning sheet. 2 When the weight exceeds 300 g / m, the weight of the moistened body-cleaning sheet becomes too heavy, resulting in poor usability. 2When the thickness exceeds 100 μm, the moistened body-cleaning sheet may be difficult to fold and store in an individual package due to its strong restoring force, resulting in poor processability.

[0021] The nonwoven fabric laminated sheet of the present invention is characterized in that the water retention capacity of the intermediate layer is higher than that of the surface layers (the individual surface layers on both sides of the intermediate layer). The water retention capacity is calculated by the following formula (1). Water holding capacity (g / m 2 )=Water retention rate (%) / 100×Basm weight (g / m 2 ) (1) The water retention rate in this specification is the water retention rate measured by the method described in JIS L1913:2010. Since the water retention capacity of the intermediate layer is higher than that of the surface layer, when the nonwoven fabric laminated sheet of the present invention is moistened and used as a body cleansing sheet, a large amount of water can be retained in the intermediate layer. This allows the body cleansing sheet to exhibit excellent heat retention when heated for use. In addition, since the amount of water retained in the surface layer can be relatively small, excessive heating of the surface is prevented when heating in a microwave oven or the like, and the surface is easy to touch even after heating, so that a body cleansing sheet that is easy to take out of a package in which the body cleansing sheet is packaged and easy to use can be provided. The difference in water retention capacity between the intermediate layer and the surface layer (water retention capacity of the intermediate layer (g / m 2 )-Water retention capacity of surface layer (g / m 2 )) is 500g / m 2 More preferably, it is 1000 g / m or more. 2 That's all.

[0022] The water retention capacity of the nonwoven fabric laminated sheet of the present invention is 1600 g / m 2 More preferably, it is 1800 g / m or more. 2 Furthermore, if the water retention rate of the nonwoven fabric for the surface layer exceeds 1000%, the feeling of use during wiping may be deteriorated, so the water retention rate is preferably 1000% or less.

[0023] When a body cleansing sheet is produced using the nonwoven fabric laminated sheet of the present invention, the following method is preferably used, for example.

[0024] In the first step, the nonwoven laminated sheet of the present invention is impregnated with a chemical solution. The chemical solution may be a general formulation mainly composed of water. As additives, moisturizers such as glycerin, polypropylene glycol, and hyaluronic acid, natural extracts such as aloe vera leaf extract, pine extract, and peach leaf extract, fragrances such as limonene, citral, and menthol, antibacterial substances such as phenoxyethanol, benzalkonium chloride, and propyl iodide butylcarbamate, and various surfactants may be added.

[0025] It is preferable that the nonwoven fabric laminated sheet of the present invention is impregnated with the chemical solution at an impregnation rate of 250 to 500% based on the basis weight. If the impregnation rate is less than 250%, the amount of chemical solution retained in the nonwoven fabric laminated sheet of the present invention is insufficient, and the heat retention may be insufficient. On the other hand, if the impregnation rate of the chemical solution exceeds 500%, the chemical solution may overflow from the nonwoven fabric laminated sheet during use, resulting in a poor feeling when used.

[0026] In the second step, the nonwoven fabric laminate sheet that has been impregnated and moistened with the drug solution in the first step is enclosed and sealed in an individual packaging bag, preferably having a moisture-proof property. Examples of the individual packaging bag include single films such as low-density polyethylene, high-density polyethylene, biaxially oriented polypropylene, biaxially oriented polyethylene terephthalate, biaxially oriented nylon, and polystyrene; composite films such as biaxially oriented polypropylene / low-density polyethylene, biaxially oriented polypropylene / linear low-density polyethylene, biaxially oriented polypropylene / unstretched polypropylene, biaxially oriented polyethylene terephthalate / low-density polyethylene, biaxially oriented polyethylene terephthalate / linear low-density polyethylene, biaxially oriented polyethylene terephthalate / unstretched polypropylene, biaxially oriented nylon / low-density polyethylene, biaxially oriented nylon / linear low-density polyethylene, polyvinylidene chloride / biaxially oriented polypropylene / linear low-density polyethylene, and silica-deposited biaxially oriented polyethylene terephthalate / linear low-density polyethylene; and composite paper such as paper / polyvinylidene chloride / unstretched polypropylene and paper / polyvinylidene chloride / linear low-density polyethylene.

[0027] In order to prevent the liquid medicine from evaporating and to ensure long-term storage, the water vapor permeability must be 30g / (m2) or less, measured at a temperature of 40±0.5°C and a relative humidity of 90±2% (temperature and humidity conditions: condition B), in accordance with JIS Z0208:1976 for packaging materials. 2 The smaller the water vapor transmission rate, the less water vapor can pass through and the more the evaporation of water vapor can be suppressed.

[0028] When the nonwoven fabric laminated sheet of the present invention is packaged and enclosed in the individual packaging bag, there is no particular limitation as long as the bag making and processing method can seal the cleaning sheet, such as pillow packaging, three-side seal packaging, four-side seal packaging, etc. Furthermore, examples of the sealing method include bonding with an adhesive, heat sealing, ultrasonic sealing, etc., but heat sealing or ultrasonic sealing is preferred from the viewpoints of preventing contamination by foreign matter and processing speed.

[0029] When the nonwoven fabric laminated sheet of the present invention is packaged and enclosed using the above-mentioned packaging material, it is preferable to fold the sheet before packaging and enclosing it. By folding the sheet before packaging and enclosing it, the individual packaging bag can be made compact, making it easy to carry and store, and it can be used as a body cleansing sheet. EXAMPLES

[0030] The present invention will be described in detail below with reference to examples, but the present invention is not limited to these examples. Here, "parts by mass" and "% by mass" represent values ​​of dry solid content or substantial component amounts.

[0031] Example 1 <Preparation of nonwoven fabric for intermediate layer> 65 parts by mass of pulp fiber, which is a cellulose-based fiber obtained by defibrating bleached softwood kraft pulp using a dry defibrator as the cellulose-based fiber, and 35 parts by mass of polypropylene / polyethylene core-sheath composite fiber (core: polypropylene, sheath: polyethylene) with a fineness of 2.2 dtex and fiber length of 5 mm as the thermal adhesive synthetic fiber were mixed in an airlaid web forming device, and the fiber web deposited together with an air flow on a mesh conveyor having a suction mechanism was heated to melt the sheath of the thermal adhesive synthetic fiber, resulting in a fiber web with a basis weight of 190 g / m 2 A nonwoven fabric was produced by the airlaid method.

[0032] <Preparation of nonwoven fabric for surface layer> 20 parts by mass of rayon fiber, a cellulose fiber with a fineness of 1.7 dtex and a fiber length of 38 mm, and 80 parts by mass of polyethylene terephthalate fiber, a thermoplastic fiber with a fineness of 1.7 dtex and a fiber length of 38 mm, were mixed together and formed into a cross-type fiber web using a carding machine and a cross wrapper. The fiber web was hydroentangled and dried by heating to a basis weight of 40 g / m 2 A nonwoven fabric was produced by the spunlace method.

[0033] <Preparation of nonwoven fabric laminate sheet> Powdered polyethylene hot melt was applied to one side of the intermediate nonwoven fabric prepared above as an adhesive component at a rate of 5 g / m. 2The nonwoven fabric for the surface layer prepared above was then laminated on top of it, and the two were bonded by heating and melting. Next, 5 g / m of powdered polyethylene hot melt was applied as an adhesive component to the other side of the nonwoven fabric for the intermediate layer in the same manner. 2 The nonwoven fabric for the surface layer prepared above was then laminated thereon, heated and melted, and bonded together to obtain a sheet having a basis weight of 280 g / m2 with the nonwoven fabric for the surface layer on both sides of the nonwoven fabric for the intermediate layer. 2 A nonwoven fabric laminate sheet was prepared.

[0034] Example 2 The nonwoven fabric for the middle layer has a basis weight of 80 g / m 2 The same as in Example 1 except that the basis weight was 170 g / m 2 A nonwoven fabric laminated sheet of Example 2 was produced.

[0035] Example 3 The nonwoven fabric for the middle layer is made of 70 parts by mass of pulp fiber, 30 parts by mass of polypropylene / polyethylene core-sheath composite fiber, and has a basis weight of 150 g / m 2 A nonwoven fabric for the intermediate layer was prepared in the same manner as in Example 1, except that the rayon fiber was 65 parts by mass, the polyethylene terephthalate fiber was 35 parts by mass, and the basis weight was 60 g / m 2 A nonwoven fabric for the surface layer was produced in the same manner as in Example 1, except that the intermediate layer nonwoven fabric and the surface layer nonwoven fabric were used to produce a nonwoven fabric with a basis weight of 280 g / m. 2 A nonwoven fabric laminated sheet of Example 3 was produced.

[0036] Example 4 The nonwoven fabric for the surface layer does not use rayon fiber, which is a cellulosic fiber, but uses only polyethylene terephthalate fiber, which is a thermoplastic fiber, and has a basis weight of 40 g / m 2 The same procedure as in Example 2 was repeated except that the nonwoven fabric was formed by the spunlace method, and the basis weight was 170 g / m. 2 A nonwoven fabric laminated sheet of Example 4 was produced.

[0037] Example 5 The nonwoven fabric for the surface layer does not use polyethylene terephthalate fiber, which is a thermoplastic fiber, but uses only rayon fiber, which is a cellulosic fiber, and has a basis weight of 28 g / m 2 The nonwoven fabric was formed by the spunlace method, and the basis weight of the intermediate layer nonwoven fabric was 104 g / m 2 The same as in Example 1 except that the basis weight was 170 g / m 2 A nonwoven fabric laminated sheet of Example 5 was produced.

[0038] Example 6 The nonwoven fabric for the middle layer is made of 82 parts by mass of pulp fiber, 18 parts by mass of polypropylene / polyethylene core-sheath composite fiber, and has a basis weight of 80 g / m 2 The same method as in Example 2 was used except that the basis weight was 170 g / m 2 A nonwoven fabric laminate sheet of Example 6 was prepared.

[0039] Comparative Example 1 The nonwoven fabric for the surface layer of Example 1 was used as it was to prepare a nonwoven fabric sheet of Comparative Example 1.

[0040] Comparative Example 2 A fiber web was formed by a cross method using a carding machine and a cross wrapper using rayon fiber, which is a cellulosic fiber with a fineness of 1.7 dtex and a fiber length of 38 mm. The fiber web was hydroentangled and dried by heating to a basis weight of 40 g / m 2 The nonwoven fabric formed by the spunlace method was used as a nonwoven fabric sheet of Comparative Example 2.

[0041] Comparative Example 3 For the nonwoven fabric sheet of Comparative Example 2, the basis weight was 80 g / m 2 A nonwoven fabric sheet of Comparative Example 3 was produced in the same manner as in Comparative Example 2, except that:

[0042] Comparative Example 4 The intermediate layer nonwoven fabric of Example 2 was prepared in the same manner as in Example 2, except that the pulp fiber, which is a cellulosic fiber, was used in an amount of 60 parts by mass, and the polypropylene / polyethylene core-sheath composite fiber, which is a thermal adhesive synthetic fiber, was used in an amount of 40 parts by mass, resulting in a basis weight of 170 g / m. 2A nonwoven fabric laminated sheet of Comparative Example 4 was produced.

[0043] <Measurement of water retention capacity> The water retention capacity of the produced nonwoven fabric laminate sheet and each laminated nonwoven fabric sheet was measured as follows. First, the water retention rate was measured according to JIS L1913:2010. Specifically, three test pieces of 100 mm x 100 mm were taken in an environment of 20 ± 2°C, and their mass (Wd) was measured, and then they were immersed in pure water for 20 minutes, removed from the water with tweezers, and after dripping water for one minute, the mass (Ww) of the test pieces was measured, and the water retention rate was calculated from the following formula (2). Water retention rate (%) = (Ww-Wd) / Wd x 100 (2) The water retention rate calculated based on formula (2) was used to calculate the water retention capacity based on formula (1) above. The measured water retention rates and water retention capacities of the intermediate layer nonwoven fabric, surface layer nonwoven fabric, nonwoven fabric laminated sheet, and nonwoven fabric sheet are shown in Table 1.

[0044] [Table 1]

[0045] <Evaluation of heat retention> The nonwoven laminated sheets or nonwoven sheets of Examples 1 to 6 and Comparative Examples 1 to 4 were cut to a size of 200 mm wide and 300 mm long. Then, the sheets were impregnated with a drug solution (aqueous solution containing 5% by mass of propylene glycol, 0.2% by mass of phenoxyethanol, 0.02% by mass of benzalkonium chloride, and 0.02% by mass of butylcarbamate iodide), and the solution was appropriately removed to prepare moistened body-cleaning sheets containing four times the amount of drug solution as the sample mass before impregnation. The moistened body-cleaning sheets were placed in a moisture-proof bag and sealed by heat sealing to prepare individually packaged body-cleaning sheets. The individually packaged body cleansing sheets made from the nonwoven laminated sheets or nonwoven sheets of Examples 1 to 6 and Comparative Examples 1 to 4 were thoroughly heated to 60°C in a towel warmer, then removed from their individual packaging bags and left to stand for 2 minutes in a fully spread-out state in an environment of 26°C and 50% relative humidity. The temperature of the sheet surface was measured using a thermometer TNA-310DL (manufactured by Ichinen TASCO Co., Ltd.) with a K thermocouple sensor. The results are shown in Table 2.

[0046] [Table 2]

[0047] <Evaluation of Usability> The individually packaged body cleansing sheets used in the "warmth evaluation" were evaluated for usability. The results are shown in Table 3.

[0048] The "evaluation of usability" was based on the following criteria: ○: It was easy to wipe off and felt good on the skin. △: Wiping was somewhat difficult. ×: Wiping was difficult.

[0049] [Table 3]

[0050] From the above results, it is evident that the nonwoven fabric laminated sheet of the present invention is a nonwoven fabric laminated sheet that has excellent water retention capacity, and is excellent in heat retention and feel when used in a wet state. [Industrial Applicability]

[0051] The nonwoven fabric laminated sheet of the present invention can be used as a body cleaning sheet that is moistened and used in homes, medical facilities, welfare facilities, nursing care facilities, beauty facilities, exercise facilities, and the like.

Claims

【Request 1】 A nonwoven fabric having at least an intermediate layer containing an airlaid nonwoven fabric and surface layers bonded to both sides of the intermediate layer via an adhesive component, the nonwoven fabric having a basis weight of 100 to 300 g / m ２ The nonwoven fabric laminate sheet is characterized in that the intermediate layer contains thermal adhesive fibers and 62 mass% or more of cellulosic fibers based on the total mass of the intermediate layer, and the water retention capacity of the intermediate layer is higher than the water retention capacity of the surface layer.

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