JP6307325B2 - Objective wiping sheet and manufacturing method thereof - Google Patents

Description

  The present invention relates to an objective wiping sheet, and more particularly to an objective wiping sheet used for cleaning cooking utensils used in a kitchen and peripheral equipment installed in the kitchen, and a method for manufacturing the objective wiping sheet.

  Various types of objective wiping sheets using non-woven fabrics have been proposed and used depending on the object and dirt to be removed, regardless of whether it is for general home use or for business use. In general households, non-woven objective wiping sheets are used for wiping floors (flooring and tatami mats), wiping glass products, wiping general household appliances, and wiping ceramics such as washstands and toilet bowls. Yes. Among the applications that require cleaning with an objective wiping sheet in general households, cooking utensils used in the kitchen, peripheral equipment, such as gas cookers and IH cooktops, oven ranges, microwave ovens, etc. The interior and the surroundings of a ventilation fan are likely to cause scorched dirt that adheres firmly to the surface of the object, liquid stains with high viscosity such as oil stains, and gel-like stains. It is annoying.

  Conventionally, a cleaning sheet using a nonwoven fabric has been developed for the purpose of removing such dirt in the kitchen.

  For example, Patent Documents 1 to 4 disclose a cleaning sheet comprising a nonwoven fabric in a two-layer structure. One of the nonwoven fabrics is impregnated with a cleaning liquid such as water, and the cleaning liquid is used for cleaning. It is disclosed to remove dirt on the other nonwoven fabric surface while releasing from the nonwoven fabric.

JP 2003-325411 A JP 2005-312711 A JP 2003-180593 A JP 2006-305177 A

  As described above, in kitchens (especially around stoves such as gas stoves and IH stoves, inside microwave ovens and around microwave ovens, and around ventilation fans), high-viscosity dirt such as burnt dirt and oil stains adhered to the surface is high. Liquid stains, aqueous or oily gel-like stains (including those where they are dried and fixed) were problems.

  For example, if the strength, hardness, roughness, etc. of the cleaning sheet are increased in order to remove such burnt dirt, the burnt dirt can be easily removed, but on the other hand, the cleaning surface is easily damaged. There were problems such as.

  If a soft nonwoven fabric is used as the cleaning sheet, damage to the cleaning surface is reduced, but there may be a problem that it takes time to remove the burnt dirt or the dirt cannot be completely removed. There is.

  Further, when removing strong burnt dirt, there is a problem that the nonwoven fabric gets caught by the burnt dirt during use and becomes fuzzy and eventually torn.

  Therefore, there is room for further improvement in the removal of the burnt dirt.

  In addition, with respect to high-viscosity liquid stains such as oil stains and gel-like stains, even if cleaning is performed by impregnating the cleaning sheet with a cleaning liquid as described in Patent Documents 1 to 4 above, There has been a problem that liquid stains and gel-like stains with high viscosity, especially oil stains, are difficult to be adsorbed on the cleaning sheet. In addition, even if these oil stains are peeled off (or separated) from the object and dissolved in a cleaning liquid such as water, the surface of the object is not absorbed by the cleaning sheet in which the oil dirt is dissolved. In addition, since the cleaning liquid is dried after cleaning, it remains as an oil film on the surface of the object, so that the wiping performance is not sufficient.

  Therefore, in addition to removing such high-viscosity liquid stains and gel-like stains such as oil stains, that is, removing (or separating) such stains from the surface of the object, such stains are dissolved. There is room for further improvement in removing the cleaning liquid from the surface of the object (that is, improving the wiping performance of the final wiping).

  In addition, according to the research of the present inventor, in a cleaning sheet using a non-woven fabric, even when the cleaning liquid is impregnated into the sheet, a single sheet removes high-viscosity liquid dirt such as oil dirt. However, to achieve both the cleaning by reducing the liquid residue and oil film residue and removing the above-mentioned strong burnt dirt, the performance required for such nonwoven fabrics is greatly different from each other, It turned out to be extremely difficult.

  An object of the present invention is to provide a sheet for objective wiping which is excellent in both removal performance of burnt dirt and liquid dirt such as oil dirt and gel dirt, and a method for producing the same.

  The present invention provides the following objective wiping sheet and manufacturing method thereof, but the present invention is not limited to the following invention.

[1]
An objective wiping sheet comprising at least two non-woven fabrics laminated and integrated with the non-woven fabrics,
In the objective wiping sheet, the nonwoven fabric constituting one surface is a heat-bonding nonwoven fabric, and the nonwoven fabric constituting the other surface is a spunlace nonwoven fabric,
The heat-bonding nonwoven fabric contains 20% by weight or more of heat-bondable fibers with respect to the total weight of the heat-bonding nonwoven fabric,
The fineness of the thermal adhesive fiber is 7.5 dtex or more and 16 dtex or less,
At least a part of the intersections of the fibers constituting the heat-bonding nonwoven fabric is heat-bonded by the heat-bonding fibers,
The spunlace nonwoven fabric contains 20% by mass or more of ultrafine fibers having a fineness of 0.6 dtex or less based on the total mass of the spunlace nonwoven fabric;
Objective wiping sheet.
[2]
The objective wiping sheet according to [1], wherein the ultrafine fibers are fibers derived from split-type composite fibers.
[3]
The objective wiping sheet according to the above [1] or [2], wherein the spunlace nonwoven fabric contains 50% by mass or more of synthetic fibers with respect to the total mass of the spunlace nonwoven fabric.
[4]
The objective wiping sheet according to any one of [1] to [3], wherein the spunlace nonwoven fabric includes 60% by mass or less of hydrophilic fibers with respect to a total mass of the spunlace nonwoven fabric.
[5]
The objective wiping sheet according to [4], wherein the hydrophilic fiber is a cellulosic fiber.
[6]
The objective wiping sheet according to any one of [1] to [5], wherein a surface of the spunlace nonwoven fabric has a recess.
[7]
The objective wiping sheet according to any one of [1] to [6], wherein a surface of the heat-bonding nonwoven fabric is substantially flat.
[8]
The objective wiping according to any one of [1] to [7], wherein the thermal bonding nonwoven fabric and the spunlace nonwoven fabric are laminated and the two nonwoven fabrics are integrated to form a two-layer structure. Sheet.
[9]
The objective wiping sheet according to any one of [1] to [8], including a cleaning material of 50 parts by mass to 1000 parts by mass with respect to 100 parts by mass of the objective wiping sheet.
[10]
The objective wiping sheet according to any one of the above [1] to [9] for use in cleaning in a kitchen, wherein burnt dirt is removed on a surface composed of the thermally bonded nonwoven fabric, Objective wiping sheet for kitchens that removes liquid or gel-like stains on the surface composed of spunlace nonwoven fabric.
[11]
A method for producing an objective wiping sheet comprising a laminate of at least two nonwoven fabrics and integrating the nonwoven fabrics,
A fiber web containing 20% by mass or more of heat-adhesive fibers having a fineness of 7.5 dtex or more and 16 dtex or less is prepared, and at least a part of the intersection of the fibers constituting the fiber web is thermally bonded by the heat-adhesive fibers. Obtaining a thermally bonded nonwoven fabric containing 20% by mass or more of the thermally adhesive fiber,
A spunlace nonwoven fabric containing ultrafine fibers having a fineness of 0.6 dtex or less, and obtaining a spunlace nonwoven fabric containing 20% by mass or more of the ultrafine fibers with respect to the total mass of the spunlace nonwoven fabric,
The thermobonding nonwoven fabric and the spunlace nonwoven fabric so that the thermobonding nonwoven fabric constitutes one surface of the objective wiping sheet, and the spunlace nonwoven fabric constitutes the other surface of the objective wiping sheet. Laminating,
Heating the heat-bonded nonwoven fabric and the spunlace nonwoven fabric in a laminated state, and integrating the heat-bonded nonwoven fabric and the spunlace nonwoven fabric;
For manufacturing a sheet for objective wiping.
[12]
The integration of the thermobonding nonwoven fabric and the spunlace nonwoven fabric is performed by inserting the thermobonding nonwoven fabric and the spunlace nonwoven fabric in a laminated state between at least one pair of opposing metal rolls, Including heat-bonding nonwoven fabric and the spunlace nonwoven fabric at least partially thermally bonded, and among the metal rolls, the metal roll in contact with the spunlace nonwoven fabric is an embossing roll having a convex portion on the surface, The metal roll that comes into contact with the thermal bonding nonwoven fabric is a metal roll with a flat surface,
During the thermal bonding, the embossing roll having the convex portion forms a concave portion corresponding to the convex portion of the embossing roll on the surface of the spunlace nonwoven fabric,
The method for producing a sheet for objective wiping according to the above [11], wherein the surface of the heat-bonding nonwoven fabric is formed substantially flat by a metal roll having a flat surface during the heat-bonding.

  According to the present invention, removal performance for burnt dirt, and removal performance for high-viscosity liquid dirt and gel-like dirt such as oil dirt (peeling (or separation) from the surface of the object, liquid residue, and oil film residue is small. It is possible to provide an objective wiping sheet excellent in both finish wiping property and a method for producing the same.

It is the schematic of the sheet | seat for objective wiping (2 layer structure) of this invention. It is the schematic which shows one Embodiment of the manufacturing method of the sheet | seat for objective wiping of this invention. It is the schematic which shows an example of the usage method of the sheet | seat for objective wiping of this invention, and shows the case where it uses by bending the spunlace nonwoven fabric 2 inside with the thermobonding nonwoven fabric 1 outside. It is the schematic which shows an example of the usage method of the sheet | seat for objective wipings of this invention, and shows the case where it uses by bending the spunlace nonwoven fabric 2 outside and the thermobonding nonwoven fabric 1 inside.

  The present invention relates to an objective wiping sheet and a manufacturing method thereof.

<Object wiping sheet>
The objective wiping sheet of the present invention is mainly used to efficiently remove high-viscosity liquid stains and gel-like stains such as burnt stains and persistent oil stains firmly adhered to the surface thereof, for example, in kitchen cleaning. It was developed for the purpose.

  The term “kitchen” used in the present invention includes kitchens, so-called kitchens, system kitchens and the like, and cooking utensils and peripheral equipment that can be used in the kitchens, for example, stoves such as gas stoves and IH stoves, microwave ovens, electronic ovens, etc. It includes a range such as a range, a ventilation fan, and a wall surface that forms the periphery of a gas stove or IH stove. The objective wiping sheet of the present invention should not be construed as limited to kitchen cleaning, as will be described in detail below.

  In the present invention, “burnt dirt” means burnt dirt that can occur in the kitchen (for example, burnt dirt due to burning of organic matter), and “liquid dirt” refers to a flow containing water and / or oil. The term “gel-like stain” means a non-flowable stain containing water and / or oil, and the gel-like stain also includes a stain in which they are dried and fixed. .

  The objective wiping sheet of the present invention is formed by laminating at least two nonwoven fabrics and integrating the nonwoven fabrics, and the nonwoven fabric constituting one surface of the objective wiping sheet is a “thermal bonding nonwoven fabric”. The nonwoven fabric constituting the other surface is “spunlace nonwoven fabric”.

  For example, as shown in FIG. 1, the objective wiping sheet 10 of the present invention is formed by laminating at least two thermal bonding nonwoven fabrics 1 and spunlace nonwoven fabrics 2 and integrating them. The other surface may be composed of a heat-bonded nonwoven fabric 1 and the other surface may be of a two-layer structure composed of a spunlace nonwoven fabric 2. However, the sheet of the present invention is not limited to such a two-layer structure.

  Here, “laminated” means that at least two non-woven fabrics are at least partially laminated, and other layers (for example, other non-woven fabric layers) inside the two non-woven fabrics as necessary. Means that may be present. The term “integrated” means that the nonwoven fabric is at least partially physically and / or chemically bonded, and preferably means that it is at least partially bonded by thermal bonding. .

  For example, as shown in FIG. 1, in the objective wiping sheet 10 of the present invention, the heat-bonding nonwoven fabric 1 scrapes off strong dirt, more specifically, burnt dirt generated in the kitchen, and the spunlace nonwoven fabric 2 oils dirt. Wipe off high-viscosity liquid stains or gel-like stains and remove them from the object (for example, burnt stains that have been scraped off and removed from the target surface, or high-viscosity liquid stains that have been wiped off and removed from the target surface) Or gel-like soil) is dissolved and / or mixed in a cleaning liquid containing water or a surfactant, and the spunlace nonwoven fabric 2 absorbs the cleaning liquid, so that it can be significantly removed from the target surface. The objective wiping sheet 10 of the present invention can also be used after being folded. Preferably, after removing the burnt dirt with the heat-bonding nonwoven fabric 1, the sheet is folded and turned into a liquid with high viscosity such as oil stains with the spunlace nonwoven fabric 2. Since dirt can be removed (see, for example, FIGS. 3 and 4), cleaning can be performed efficiently with a single sheet.

  Moreover, as shown in FIGS. 2-4, the surface of the spunlace nonwoven fabric 2 is subjected to embossing by using an embossing roll as the metal roll 13, for example, thereby bending the sheet of the present invention as shown in FIG. Thus, when removing the strong burnt dirt with the heat-bonding nonwoven fabric 1 along the direction of the arrow a, it is possible to prevent slippage between the inner facing spunlace nonwoven fabrics 2 and improve workability. After that, for example, as shown in FIG. 4, when the sheet of the present invention is folded and the spunlace nonwoven fabric 2 removes high-viscosity liquid stains such as oil stains, the removal effect is exerted by the embossed recesses. It can be further increased.

  Thus, in the objective wiping sheet of the present invention, a single sheet is a highly viscous liquid stain and gel, such as a burnt stain that is fixed to the target surface or an oil stain that is difficult to remove from the target surface. Can be efficiently removed, and the surface can be finished with less oil film residue with a small number of wipes.

  Hereinafter, the thermal bonding nonwoven fabric and the spunlace nonwoven fabric that can be used in the objective wiping sheet of the present invention (hereinafter sometimes simply referred to as “sheet”) will be described in detail.

[Thermal bonding nonwoven fabric]
In the present invention, the “thermoadhesive nonwoven fabric” includes 20% by mass or more of thermoadhesive fibers with respect to the total mass of the nonwoven fabric, and the fibers constituting the nonwoven fabric by the thermal adhesive fibers (that is, included in the nonwoven fabric). (Non-woven fabric) obtained by thermally bonding at least a part of the intersection of the fibers) (hereinafter also referred to as “thermal bond nonwoven fabric”).

  In addition, the “thermal adhesive fiber” that can be used in the present invention means a fiber that can exhibit thermal adhesiveness by heating.

  Here, “thermal adhesiveness” means the property of exhibiting adhesiveness by heating, but the heating temperature and the degree of adhesiveness required to exhibit this adhesiveness are not particularly limited.

  As the thermoadhesive fiber, for example, a fiber comprising at least one kind of thermoplastic resin, preferably a composite fiber comprising at least two kinds of thermoplastic resin can be used. In the present invention, the thermoadhesive fiber can contain a maximum of six types of thermoplastic resins, and there is no particular limitation on the type and blending ratio.

  In the present invention, a conventionally known thermoplastic resin can be used without any limitation as the thermoplastic resin.

  Examples of thermoplastic resins include polyester resins such as polyethylene terephthalate, polybutylene terephthalate, polytrimethylene terephthalate, polyethylene naphthalate, polylactic acid, polybutylene succinate; low density polyethylene, medium density polyethylene, high density polyethylene, linear Polyethylene resins that are polymerized using ordinary Ziegler-Natta catalysts and metallocene catalysts, such as low-density polyethylene and ultrahigh molecular weight polyethylene, and isotactic polymers that are polymerized using ordinary Ziegler-Natta catalysts and metallocene catalysts Various polypropylene resins such as tic, atactic and syndiotactic, various polymethylpentene resins, various polybutene-1 resins, ethylene-vinyl alcohol copolymer resins, ethylene-propylene copolymers Various polyolefin resins such as fats; Polyamide resins such as nylon 6, nylon 66, nylon 11, nylon 12; engineering plastics such as polycarbonate, polyacetal, polystyrene, cyclic polyolefin, etc., but are not limited thereto is not.

  Among them, it is preferable to use a composite fiber comprising two types of thermoplastic resins, and it is more preferable to use a combination of two types of polyolefin resins, and in particular, a polyethylene resin and a polypropylene resin are used. Use in combination makes it possible to easily manufacture heat-adhesive conjugate fibers, heat-bonding at low temperatures, formation of heat-bonding points with excellent adhesive strength, manufacturing costs, and production costs can be kept low. It is preferable at such points.

  Here, of the two thermoplastic resins contained in the composite fiber, the one having a low melting point (melting point after spinning) is defined as the first component, and the one having a higher melting point (melting point after spinning) is defined as the second component. Then, the composite ratio (second component / first component) is preferably 80/20 to 20/80 in volume ratio.

  Further, the composite fiber may have a core-sheath type, an eccentric core-sheath type, a parallel type (side-by-side type), a split type, and a sea-island type structure. There is no restriction | limiting in particular in the manufacturing method of this composite fiber, For example, you may manufacture using a conventionally well-known method. Or you may use a commercially available thing.

  In the present invention, the fineness of the above-mentioned heat-adhesive fiber contained in the heat-bonding nonwoven fabric is 7.5 dtex or more and 16 dtex or less, preferably 8.0 dtex or more and 15 dtex or less, more preferably 8.5 dtex or more, 14.5 dtex or less, particularly preferably 9.8 dtex or more and 14.0 dtex or less.

  When the fineness of the heat-adhesive fiber is within the above range, the ability to remove strong dirt, more specifically, burnt dirt in the kitchen, is dramatically improved. Moreover, the intensity | strength of a thermobonding nonwoven fabric improves and it can also suppress the tear at the time of use. Surprisingly, such an effect can be obtained, and the risk of damaging the surface of the object can be reduced.

  When the fineness of the heat-adhesive fiber is less than 7.5 dtex, the effect of scraping off dirt that is firmly attached to the target surface is reduced. On the other hand, if the fineness exceeds 16 dtex, if the basis weight of the nonwoven fabric is the same, the number of the heat-adhesive fibers constituting the nonwoven fabric is reduced, and in this case, the scraping effect is also reduced. Also, if the fineness exceeds 16 dtex, depending on the single fiber strength of the heat-adhesive fiber and the heat-bonded state of the heat-bonded nonwoven fabric, the entire heat-bonded nonwoven fabric becomes a very hard nonwoven fabric, and the surface of the object is damaged. There is a risk of problems such as becoming easier.

  In the present invention, the above-mentioned heat-adhesive fibers contained in the heat-bonding nonwoven fabric may be short fibers or long fibers, and there is no particular limitation on the length thereof, for example, 28 mm or more, 105 mm or less, Preferably they are 32 mm or more and 90 mm or less, More preferably, they are 42 mm or more and 80 mm or less, Especially preferably, they are 48 mm or more and 72 mm or less.

  Further, in the present invention, the blending amount of the above-mentioned thermoadhesive fibers contained in the thermobonding nonwoven fabric is 20 mass% or more, preferably 40 mass% or more, based on the total mass of the thermobonding nonwoven fabric as described above. More preferably, it is 60% by mass or more, and particularly preferably 80% by mass or more. In the present invention, the upper limit of the heat-bonding fibers contained in the heat-bonding nonwoven fabric is not particularly limited, and the heat-bonding nonwoven fabric may be a nonwoven fabric made of heat-bonding fibers.

  When the blending amount of the heat-adhesive fibers is within the above range, not only a sufficient heat-adhesion effect at the time of producing the nonwoven fabric can be obtained, but also the lamination integration with the spunlace nonwoven fabric described later becomes strong, and objective wiping is achieved. Even if force is applied as a sheet for wiping and the dirt is wiped off, the heat-bonded nonwoven fabric and the spunlace nonwoven fabric do not easily peel off. In addition, since a non-woven fabric that is sufficiently hard can be obtained as a whole, a heat-bonding non-woven fabric having high performance for scraping off dirt that is firmly attached to the surface of the object can be obtained.

  In addition, the fiber contained in the thermobonding nonwoven fabric is not limited to the above-mentioned thermoadhesive fiber, and may further contain other fibers as long as the above effects are not impaired, if necessary ( Hereinafter, it may be referred to as “mixed fiber”).

  There are no particular restrictions on the mixed fibers, for example, natural wood fibers such as ramie, linen, kenaf, abaca, henken, jute, hemp, palm, palm, mulberry, mitsumata, bagasse, etc. Alternatively, regenerated fibers such as viscose rayon, Tencel (registered trademark), lyocell (registered trademark), and cupra may be used. The mixed fiber may be a fiber made of a synthetic resin.

  Examples of the fiber made of a synthetic resin include, for example, a single fiber made of a known polyester such as polyethylene terephthalate, polybutylene terephthalate, polytrimethylene terephthalate, polyethylene naphthalate, polylactic acid, polybutylene succinate, or a known polyethylene resin. From known polyolefin resins such as a single fiber comprising a known polypropylene resin, a copolymer resin of these polyolefin monomers, or a polyolefin using a metallocene catalyst when polymerizing these polyolefins. Single fiber made of nylon, nylon 66, nylon 11, nylon 12 and other known polyamide, (poly) acrylic single fiber made of acrylonitrile, polycarbonate, poly Single fibers of engineering plastics such as settal, polystyrene, and cyclic polyolefin, polyesters, polyolefins, polyamides, single fibers of engineering plastics, or resins made of different types of resins or the same type of different polymer components (for example, And a composite fiber obtained by combining polyethylene terephthalate and polytrimethylene terephthalate).

  When the mixed fiber is a composite fiber made of a synthetic resin, the composite state is not particularly limited. For example, the composite fiber is a core-sheath type composite fiber, an eccentric core-sheath type composite fiber, a parallel type composite fiber, a split type composite fiber or a sea-island type composite fiber in which citrus tufted resin components are alternately arranged. Also good.

  The blending amount of the mixed fiber in the heat-bonded nonwoven fabric is less than 80% by weight, preferably less than 60% by weight, more preferably less than 40% by weight, particularly preferably less than 20% by weight, based on the total weight of the heat-bonded nonwoven fabric. is there. If it is not necessary to use the mixed fiber, it may not be included in the heat-bonded nonwoven fabric.

  As described above, the heat-bonding nonwoven fabric including the above-described fibers can be formed by heat-bonding at least a part of the intersections of the constituent fibers with the heat-bonding fibers.

The overall basis weight of such a heat-bonding nonwoven fabric is, for example, 5 g / m ² or more and 40 g / m ² or less. If the basis weight of the heat-bonding nonwoven fabric is less than 5 g / m ² , the number of fibers constituting the heat-bonding nonwoven fabric is small and the thickness of the heat-bonding nonwoven fabric is thin, so that it adheres firmly to the surface of the object. There is a risk that the performance of scraping off the dirt will deteriorate. If the basis weight of the heat-bonding nonwoven fabric exceeds 40 g / m ² , the heat-bonding nonwoven fabric may be too thick or too hard, and the handleability as an objective wiping sheet may be reduced. The basis weight of the heat-bonding nonwoven fabric is preferably 10 g / m ² or more and more preferably 35 g / m ² or less, particularly preferably 12 g / m ² or more and 30 g / m ² or less, and 15 g / m ² or more. Most preferably, it is 25 g / m ² or less.

  When the basis weight of the heat-bonding nonwoven fabric is within the above range, the heat-bonding nonwoven fabric can be thinly formed while maintaining a certain level of strength. By doing so, it becomes possible to bend while maintaining a certain degree of strength (see, for example, FIGS. 3 and 4).

  Further, when the basis weight of the heat-bonding nonwoven fabric is within the above range, for example, the sheet is folded and used as shown in FIGS. 3 and 4 while maintaining a certain degree of strength, and including the heat-bonding nonwoven fabric, Since the entire objective wiping sheet is flexible, it has high followability to the fine shape of the surface of the object to be cleaned, and it is not only easy to handle, but also various types of dirt (scratched dirt that adheres firmly to the surface, oil stains) It becomes a sheet for objective wiping with high removal performance against high-viscosity liquid stains or gel-like stains.

  In the sheet of the present invention, the thickness of the thermobonding nonwoven fabric is, for example, 0.2 mm or more and 1.5 mm or less, preferably 0.2 mm or more and 1.2 mm or less, more preferably 0.25 mm or more and 1.0 mm or less, particularly Preferably they are 0.3 mm or more and 0.8 mm or less.

  When the thickness of the heat-bonding nonwoven fabric is within the above-mentioned range, sufficient strength can be obtained to scrape off strong dirt such as burnt dirt, and the sheet of the present invention can be folded.

  Moreover, in the sheet | seat of this invention, it is preferable that the surface (namely, the surface on the opposite side to the surface laminated | stacked on a spunlace nonwoven fabric) which removes the stain | pollution | contamination of a heat bonding nonwoven fabric is substantially flat.

  Here, the surface of the heat-bonded nonwoven fabric is “substantially flat” means that the surface of the prepared heat-bonded nonwoven fabric is further subjected to a shaping process such as heat embossing separately. It means that there is no recess or less than 20% of the thickness of the nonwoven fabric when the thickness of the nonwoven fabric is 100%. In addition, such a recessed part does not include the fine recessed part resulting from the fiber contained in the thermobonding nonwoven fabric, or the part where there is no constituent fiber that may be generated when the thermal bonding nonwoven fabric has a low basis weight.

  As described above, since the heat-bonding nonwoven fabric is substantially flat, it can be brought into parallel and appropriate contact with strong dirt, particularly burnt dirt in the kitchen, and the dirt can be efficiently removed.

  Further, for example, as shown in FIGS. 3 and 4, when the sheet of the present invention is folded and used, the shape can be appropriately maintained, preferably parallel to the object as illustrated.

[Spunlace nonwoven fabric]
In the present invention, the term “spunlace nonwoven fabric” is obtained by a conventionally known spunlace method in which fibers are entangled with a water stream to produce a nonwoven fabric, as will be described in detail below regarding the method for producing an objective wiping sheet of the present invention. (Hereinafter sometimes referred to as “hydroentangled nonwoven fabric”).

  In the present invention, the spunlace nonwoven fabric contains ultrafine fibers having a fineness of 0.6 dtex or less at a ratio of 20% by mass or more with respect to the total mass of the spunlace nonwoven fabric.

(Extra fine fiber)
The ultrafine fiber having a fineness of 0.6 dtex or less that can be used in the present invention is usually a synthetic fiber that does not exist in nature, and its fineness is 0.6 dtex or less, preferably 0.01 dtex or more, 0.6 dtex or less. As long as it is more preferably 0.03 dtex or more and 0.5 dtex or less, particularly preferably 0.05 dtex or more and 0.5 dtex or less, a conventionally known synthetic fiber can be used without any limitation.

  In the present invention, if the fineness of the ultrafine fibers is within the above range, the surface of the sheet of the present invention, particularly the spunlace nonwoven fabric, is excellent in removing liquid stains such as oil stains. This is because liquid dirt can be absorbed quickly and efficiently by the capillary phenomenon of such ultrafine fibers.

  The blending amount of the ultrafine fibers in the spunlace nonwoven fabric is 20% by mass or more, preferably 40% by mass or more, more preferably 50% by mass or more, and particularly preferably 60% by mass with respect to the total mass of the spunlace nonwoven fabric. % Or more, and most preferably 70% by mass or more. In the spunlace nonwoven fabric, the upper limit of the blend amount of the ultrafine fibers is not particularly limited, and may be 100% by mass, that is, a nonwoven fabric composed entirely of ultrafine fibers, or 95% by mass or less, or 90% by mass. % Or less.

  When the blending amount of the ultrafine fibers is within the above range, the softness is improved so that the adsorptivity to high-viscosity liquid stains such as oil stains and gel-like stains is improved. In addition, since the capillary phenomenon appears due to the presence of the ultrafine fibers, the spunlace nonwoven fabric absorbs such dirt regardless of whether it is an aqueous liquid or an oily liquid. As a result, the amount of the spunlace nonwoven fabric that absorbs the cleaning liquid in which the dirt peeled (or separated) from the surface of the object by wiping is dissolved or mixed increases the liquid residue and oil film residue on the object surface. Effects such as can be obtained.

  The fiber length of the ultrafine fiber is not particularly limited, and may be a short fiber or a long fiber, and the length thereof is not particularly limited, but is, for example, 26 mm or more and 96 mm or less, preferably 32 mm or more and 88 mm or less, More preferably, they are 38 mm or more and 72 mm or less, Especially preferably, they are 42 mm or more and 64 mm or less.

  The ultrafine fiber used in the present invention is preferably a fiber derived from a split type composite fiber described in detail below.

(Fiber derived from split type composite fiber)
The split type composite fiber is a composite fiber composed of two or more components, and can form a plurality of fibers having smaller fineness from one fiber by splitting. “Fiber derived from split type composite fiber” means a single fiber formed by splitting a split type composite fiber consisting of only one section before splitting, a fiber consisting of two or more sections, and one fiber A part of the split type composite fiber is divided, but the other part is not split at all. Or, as long as the spunlace nonwoven fabric includes fibers formed by splitting the split-type conjugate fibers, when one split-type conjugate fiber may not be split at all, such splitting is not performed at all. Non-split composite fibers are also included in the fibers derived from split composite fibers.

  Specifically, the split-type conjugate fiber is formed by dividing at least one component of the constituent components into two or more in the fiber cross section, and at least a part of the constituent components are exposed on the fiber surface, and the exposed portion is the fiber. It has a fiber cross-sectional structure formed continuously in the length direction. The split type composite fiber used in the present invention is composed of two or more components, and one of the two or more components is a component of a thermoplastic resin having a melting point of 140 ° C. or less (“low melting point component”). One other component is a component of a thermoplastic resin having a melting point exceeding 140 ° C. (“high melting point component”). Here, melting | fusing point is melting | fusing point of resin after making it into a fiber, and can be calculated | required from the DSC curve measured according to JISK7121 (1987). Since the low melting point component serves to bond the fibers together, it can also be called a thermal bonding component. In the present invention, one component of the split-type composite fiber is used as a low melting point component, and at least a part of the intersections of the fibers are bonded with ultrafine fibers composed of the low melting point component. Thereby, the handleability of the spunlace nonwoven fabric is improved. The high melting point component has a sufficient melting point difference from the low melting point component, preferably a melting point difference of 5 ° C. or more, more preferably 10 ° C. or more, and is not deformed by heat at a temperature at which the low melting point component is melted. It is preferable that

  The components constituting the split-type composite fiber are not particularly limited, and polyester resins such as polyethylene terephthalate, polybutylene terephthalate, polytrimethylene terephthalate, polyethylene naphthalate, polylactic acid, polybutylene succinate and copolymers thereof, polypropylene , Polyethylene (including high density polyethylene, low density polyethylene, linear low density polyethylene, etc.), polybutene-1, ethylene-propylene copolymer, ethylene-vinyl alcohol copolymer, ethylene-vinyl acetate copolymer, etc. Selected from polyolefin resins, polyamide resins such as nylon 6, nylon 12 and nylon 66, and the like. The component constituting the split-type conjugate fiber may have an official moisture content of less than 5% when the fiber is constituted by itself, or may be more than 5%.

  The combination of the high melting point component / low melting point component constituting the split type composite fiber is polyethylene terephthalate / polyethylene, polyethylene terephthalate / ethylene-propylene copolymer, polypropylene / polyethylene, etc. (polyethylene is high-density polyethylene, low-density polyethylene). , And any one or a combination of linear low density polyethylene). Since polyethylene melts at a relatively low temperature and bonds the fibers well, it is preferable to use this as a thermal bonding component. Of the above combinations, the polyethylene terephthalate / polyethylene combination is particularly preferred.

  The fineness of the split-type composite fiber is 0.6 dtex or less, preferably 0.01 dtex or more, preferably 0.6 dtex or less when divided into components (that is, when each section becomes one fiber). There is no particular limitation as long as it provides ultrafine fibers. In the present invention, the fibers derived from the split-type composite fibers include ultrafine fibers composed of a low melting point component, which thermally bond at least some of the intersections of the fibers. When the fineness of the ultrafine fiber composed of the low melting point component is 0.6 dtex or less, the thermal bonding point is small, so that the texture of the nonwoven fabric is hardly impaired and the nonwoven fabric is not easily hardened.

  In order to generate such ultrafine fibers, the fineness of the split composite fibers is preferably 1 dtex or more and 9 dtex or less, more preferably 1.3 dtex or more and 6.7 dtex or less, and still more preferably 1.5 dtex or more and 4.4 dtex or less, particularly preferably 1.6 dtex or more and 3.5 dtex or less. In addition, the number of divisions into components in the split-type conjugate fiber (that is, the number of sections in the conjugate fiber) is, for example, preferably 4 or more and 32 or less, more preferably 4 or more and 20 or less, Most preferably, it is 6 or more and 16 or less. When the number of divisions is small, it is necessary to reduce the fineness before division in order to form ultrafine fibers with a fineness of 0.6 dtex or less. A split type composite fiber having a small fineness is difficult to produce and may reduce the productivity of the nonwoven fabric. A split type composite fiber having a large number of splits needs to be manufactured using a complex spinning nozzle and strictly controlling the melt spinning conditions. Therefore, the use of such split-type composite fibers may increase the manufacturing cost of the nonwoven fabric. The lower limit of the fineness of the ultrafine fiber is not particularly limited, but is preferably 0.01 dtex or more.

  The shape of the section is not particularly limited. For example, the split type composite fiber may be one in which wedge-shaped sections are arranged in a chrysanthemum shape. Alternatively, the split-type composite fiber may be one in which each section is arranged in layers in the fiber cross section. Further, the split-type composite fiber may be a so-called solid split-type composite fiber that does not have a cavity portion continuous in the length direction when the fiber cross section is observed, or one or more cavities continuous in the length direction. It may be a so-called hollow split type composite fiber having a portion.

  The volume ratio of the components constituting the split-type conjugate fiber can be determined according to the fineness of the ultrafine fiber to be obtained. For example, the volume ratio of the low melting point component to the high melting point component is preferably 2: 8 to 8: 2 (low melting point component: high melting point component). When the volume ratio is within the above range, the productivity of the composite fiber and the splitting property of the composite fiber tend to be high. The volume ratio of the low melting point component: high melting point component is more preferably 4: 6 to 6: 4.

(Other synthetic fibers)
In the present invention, in addition to the above-mentioned ultrafine fibers, other conventionally known synthetic fibers may be blended in the spunlace nonwoven fabric.

  Examples of the synthetic resin fibers include polyethylene terephthalate, polybutylene terephthalate, polytrimethylene terephthalate, polyethylene naphthalate, polylactic acid, polybutylene succinate, and other known polyester fibers, and known polyethylene-based resins. A single fiber, a single fiber made of a known polypropylene resin, a copolymer resin of these polyolefin monomers, or a single fiber made of a known polyolefin resin such as a polyolefin using a metallocene catalyst when polymerizing these polyolefins. Single fiber, nylon 6, nylon 66, nylon 11, nylon 12 and other known polyamide fibers, acrylonitrile (poly) acrylic single fiber, polycarbonate, polyaceter , Single fibers of engineering plastics such as polystyrene and cyclic polyolefins, polyesters, polyolefins, polyamides, single fibers of engineering plastics, or resins of different types or of the same type of different polymer components (eg polyethylene Examples thereof include composite fibers obtained by combining terephthalate and polytrimethylene terephthalate).

  In the spunlace nonwoven fabric, the total blending amount of synthetic fibers (including the above-described ultrafine fibers) is, for example, 50% by mass or more, preferably 55% by mass or more, preferably 95% by mass or less, based on the total mass of the spunlace nonwoven fabric. More preferably, they are 60 mass% or more and 92 mass% or less, Especially preferably, they are 70 mass% or more and 90 mass% or less.

  When the blending amount of the synthetic fiber is within the above range, the wiping property at the time of wiping is good, and the effect that the liquid remaining is small is obtained.

  It should be noted that the total blend amount of the synthetic fibers does not include the amount of hydrophilic fibers described in detail below.

  (Hydrophilic fiber)

  The spunlace nonwoven fabric of the present invention is 60% by mass or less, preferably 5% by mass or more and 50% by mass or less, more preferably 8% by mass or more and 40% by mass or less, particularly with respect to the total mass of the spunlace nonwoven fabric. Preferably, 10 mass% or more and 30 mass% or less of hydrophilic fiber is included.

  When the spunlace nonwoven fabric contains the hydrophilic fiber in the above range, for example, the adsorption performance of aqueous liquid dirt is improved.

  Further, the hydrophilic fiber can hold a liquid such as water and a cleaning material that can be impregnated into the nonwoven fabric as needed, and the held liquid is supplied to the object at the time of use, and finally after the cleaning. The cleaning liquid can be absorbed to play a role of removing moisture from the target surface as much as possible.

The hydrophilic fiber is a fiber having an official moisture content of 5% or more. The official moisture content is shown in JIS L0105 (2006). When the official moisture content is not known, the value calculated from the following formula is used as the official moisture content.
Official moisture content (%) = [(W−W ′) / W ′] × 100
Here, W means the mass (g) of the fiber in an environment of a temperature of 20 ° C. and a humidity of 65% RH, and W ′ means the mass (g) when the fiber is completely dry. In addition, the mass of the fiber in the environment of temperature 20 degreeC and humidity 65% RH means the mass when a fiber is left to stand in the environment of temperature 20 degreeC and humidity 65% RH, and becomes constant mass, and fiber The mass at the time of absolute drying means the mass when the fiber is left in a dryer set at 105 ° C. and becomes a constant mass.

  Specific examples of hydrophilic fibers include natural fibers such as pulp, cotton, hemp, silk, and wool, regenerated fibers such as viscose rayon, cupra, and solvent-spun cellulose fibers, and synthetic fibers having hydrophilicity, or Hydrophobic synthetic fibers (synthetic fibers having an official moisture content of less than 5%) are subjected to a hydrophilic treatment. Examples of the hydrophilization treatment include corona discharge treatment, sulfonation treatment, graft polymerization treatment, kneading of a hydrophilizing agent into fibers, and application of a durable oil agent.

  The hydrophilic fiber is preferably a cellulosic fiber. Cellulosic fibers are more specifically 1) pulps such as mechanical pulp, regenerated pulp and chemical pulp, 2) plant natural fibers such as cotton, hemp, and 3) viscose rayon, cupra, and Regenerated fibers such as solvent-spun cellulose fibers (for example, lentung lyocell (registered trademark) and tencel (registered trademark)).

  The pulp may be produced in a conventional manner using coniferous or hardwood wood. In general, the fineness of pulp fibers is about 1.0 dtex to 4.0 dtex, and the fiber length is about 0.8 mm to 10 mm. However, pulp fibers having fineness and / or fiber length outside this range are used. Also good.

  When using recycled fiber, the fineness thereof is preferably about 0.1 to 6 dtex, more preferably about 0.3 to 3.5 dtex. Regenerated fibers having a fineness within this range are suitable for ensuring flexibility. When the fineness of the regenerated fiber is too small, the card passing property at the time of producing the fiber web is deteriorated, and the productivity of the nonwoven fabric may be lowered. When the fineness of the regenerated fiber is too large, the nonwoven fabric may be rough and the touch may be lowered.

  In addition, the spunlace nonwoven fabric is not only the above-mentioned fibers, but also other fibers such as various wood pulps produced from coniferous trees and hardwoods, ramie, linen, kenaf, abaca, henken, jute, hemp, palm, palm Natural fibers such as mulberry, mitsumata, bagasse and the like may be contained, and the blending amount is not particularly limited.

Here, in the present invention, the overall basis weight of the spunlace nonwoven fabric is, for example, 30 g / m ² or more and 100 g / m ² or less, preferably 40 g / m ² or more and 90 g / m ² or less, more preferably It is 50 g / m ² or more and 80 g / m ² or less, and particularly preferably 60 g / m ² or more and 75 g / m ² or less.

  If the overall basis weight of the spunlace nonwoven fabric is within the above range, the nonwoven fabric has a sufficient thickness, so that the durability during operation is excellent. In addition, since a sufficient amount of the cleaning liquid can be held by the whole nonwoven fabric, the effect of improving the wiping property can be obtained.

In the present invention, the spunlace nonwoven fabric may be a single layer or a multilayer structure of two or more layers. In this case, the basis weight of each layer is independently, for example, 10 g / m ² or more and 70 g / m ² or less, preferably 15 g / m ² or more and 50 g / m ² or less, more preferably Is 20 g / m ² or more and 45 g / m ² or less, particularly preferably 25 g / m ² or more and 40 g / m ² or less.

  In addition, when the spunlace nonwoven fabric has a multilayer structure, the number of layers is not particularly limited, but it can have a structure of 5 layers at the maximum, more preferably 4 layers at the maximum.

  In the present invention, a spunlace nonwoven fabric having a multilayer structure preferably has a three-layer structure, and a layer located in the middle (hereinafter referred to as “intermediate layer”) is a layer composed of the above-described hydrophilic fibers. Further preferred.

  Since the hydrophilic fiber has hydrophilicity as described above, it is suitable for adsorbing or holding an aqueous liquid, but is not suitable for adsorbing oil stains. Therefore, if a layer composed of hydrophilic fibers is arranged as the outermost layer of a three-layer structure, oil stains may remain and an oil film may be formed. It is preferable to arrange as a layer and impregnate it with a cleaning agent such as water as necessary to use it as a retaining layer for the cleaning agent.

  Further, the outer layer of the three-layer structure, particularly the outermost layer, is preferably composed of fibers derived from the above-mentioned split type composite fibers, and the adsorptivity of oil stains and the like is greatly improved by such fibers.

  Here, in the sheet of the present invention, the total thickness of the spunlace nonwoven fabric is, for example, 0.3 mm or more and 2.0 mm, preferably 0.4 mm or more and 1.5 mm or less, more preferably 0.5 mm. The thickness is 1.2 mm or less, particularly preferably 0.6 mm or more and 1.0 mm or less.

  When the thickness of the spunlace nonwoven fabric is within the above range, a thickness sufficient to adsorb liquid dirt such as oil dirt can be obtained.

  Here, for example, as shown in FIG. 2, the spunlace nonwoven fabric 2 is sandwiched and laminated between the two opposing metal rolls 13 and 14 together with the above-described thermobonding nonwoven fabric 1, and heat is applied between them. By doing so, for example, by heating with either one or both of the metal rolls 13 and 14, it is possible to integrate with the heat-bonded nonwoven fabric 1 by thermal bonding.

  At this time, as shown in FIG. 2, by using an embossing roll having a convex portion on the surface as the metal roll 13, a concave portion having a shape corresponding to the shape of the convex portion of the embossing roll is formed on the surface of the spunlace nonwoven fabric 2. be able to.

  Thus, by forming a recessed part in the surface of a spunlace nonwoven fabric, the wiping effect by the surface of a spunlace nonwoven fabric further improves in the objective wiping sheet of the present invention. Moreover, the frictional force between the surface of the spunlace nonwoven fabric and the object can be appropriately adjusted by the recess.

  The depth of the concave portion is, for example, 0.1 mm or more and 1.5 mm or less, preferably 0.2 mm or more and 1.2 mm or less, more preferably 0.3 mm or more and 1.0 mm or less, and particularly preferably 0.3 mm. This is 0.8 mm or less.

  There is no restriction | limiting in particular in the shape of this recessed part and the pattern of arrangement | positioning. In detail, it explains in full detail in description of the following manufacturing methods.

  In addition, as illustrated in FIG. 3, when the sheet of the present invention is used so that the surface of the heat-bonding nonwoven fabric 1 of the objective wiping sheet of the present invention is on the outside, strong dirt, particularly burnt dirt, When scraping by moving the sheet along the direction of arrow a, the frictional force is increased by the recesses formed on the surface of the spunlace nonwoven fabric 2, and the nonwoven fabric slides against each other between the opposite spunlace nonwoven fabrics 2. Can be significantly suppressed.

<Other layers contained in the objective wiping sheet of the present invention>
The objective wiping sheet of the present invention may include not only the above-described thermal bonding nonwoven fabric and spunlace nonwoven fabric, but also other layers (for example, other nonwoven fabric layers) between the thermal bonding nonwoven fabric and the spunlace nonwoven fabric. Good.

<Cleaning fee>
The objective wiping sheet of the present invention may be impregnated with a cleaning material in order to more efficiently remove the above-mentioned dirt.

  In the present invention, the cleaning material is preferably impregnated into the spunlace nonwoven fabric. At this time, when the cleaning material is aqueous, the spunlace nonwoven fabric preferably includes hydrophilic fibers.

  Cleaning agents that can be impregnated or used in combination with the objective wiping sheet of the present invention are surfactants, alkalis in an aqueous medium such as water (for example, tap water, industrial water, distilled water, deionized water, etc.). It preferably contains a cleaning component such as an agent, an electrolyte and a water-soluble solvent, and can dissolve and / or decompose the above-mentioned dirt. The nonvolatile residual component that can be contained in the cleaning material is preferably 10% by weight or less from the viewpoint of finish after cleaning, and particularly preferably 5% by weight or less.

  As the surfactant, any of an anionic surfactant, a nonionic surfactant, a cationic surfactant and an amphoteric surfactant can be used. Alkylene (alkylene oxide addition mole number 1 to 20) alkyl (linear or branched chain having 8 to 22 carbon atoms) ether, alkyl (linear or branched chain having 8 to 22 carbon atoms) glycoside (average degree of sugar condensation 1 to 5) ), Nonionic surfactants such as sorbitan fatty acid (straight or branched chain having 8 to 22 carbon atoms) ester, alkyl (straight or branched chain having 6 to 22 carbon atoms) glyceryl ether, and alkylcarboxybetaine, alkylsulfo Betaine, alkylhydroxysulfobetaine, alkylamide carboxybetaine, alkylamide sulfobetaine, alkylamide hydride 8-24 amphoteric surfactants alkyl carbon atoms such as carboxymethyl sulfobetaine is preferably used. The surfactant may be contained in the cleaning material at a ratio of 0.01% by mass or more and 2.0% by mass or less.

  Examples of the alkaline agent include hydroxides such as sodium hydroxide, carbonates such as sodium carbonate and potassium carbonate, alkaline sulfates such as sodium hydrogen sulfate, phosphates such as primary sodium phosphate, sodium acetate, and succinic acid. Organic alkali metal salts such as sodium, alkanolamines such as ammonia, mono, di or triethanolamine, β-aminoalkanols such as 2-amino-2-methyl-1-propanol, morpholine, etc. Of these, alkanolamines such as mono-, di- or triethanolamine, β-aminoalkanols such as 2-amino-2-methyl-1-propanol, and morpholine are preferred. The alkaline agent may be contained in the cleaning material at a ratio of 1% by mass or less.

  Examples of the electrolyte include monovalent water-soluble metal salts such as sodium chloride, potassium chloride and sodium sulfate, divalent water-soluble metal salts such as magnesium sulfate, calcium chloride and zinc sulfate, aluminum chloride and iron chloride. Such trivalent water-soluble metal salts and water-soluble organic acid salts such as sodium citrate, sodium succinate, sodium tartrate, sodium lactate and sodium fumarate are preferred. The electrolyte may be contained in the cleaning material at a ratio of 0.01% by mass or more and 10% by mass or less.

  As the water-soluble solvent, one or more selected from monohydric alcohols, polyhydric alcohols and derivatives thereof are preferable. In particular, from the viewpoint of oil stain solubility, finish, and safety, ethanol, isopropyl alcohol, propanol, ethylene glycol monomethyl ether, propylene glycol monomethyl ether, propylene glycol, butanediol, 3-methyl-1,3-butanediol Hexylene glycol, glycerin and the like are preferable. The water-soluble solvent may be contained in the cleaning material in a proportion of 1% by mass or more and 50% by mass or less.

  In addition to the above-described cleaning components, the cleaning agent may include a disinfectant (eg, hydrogen peroxide, hypochlorous acid, sodium hypochlorite, quaternary ammonium salt, sodium benzoate and paraoxyoxygen as necessary. Sodium benzoate, natural disinfectants such as polylysine, and the like), fragrances, antifungal agents, dyes (dyes, pigments), chelating agents, abrasives, bleaching agents, and the like can also be included.

  In addition, it is cleaning that water which is a medium of the cleaning material is contained in the cleaning material in a proportion of 50% by mass or more and 99.9% by mass or less, preferably 75% by mass or more and 99% by mass or less. It is preferable from the viewpoint of the cleanability and finish of the surface.

  Although there is no restriction | limiting in particular in the usage-amount of cleaning material, Preferably it is 50 to 1000 mass parts with respect to 100 mass parts of objective wiping sheets, More preferably, it is 100 to 750 mass parts cleaning material. Impregnate.

  By impregnating the cleaning material within such a range, the dirt removal performance of the objective wiping sheet of the present invention is dramatically improved.

  When the objective wiping sheet of the present invention contains such a cleaning material, the objective wiping sheet of the present invention may be packaged and packaged with an appropriate packaging material for sale.

  At this time, the objective wiping sheet of the present invention may be appropriately folded, or a plurality of such sheets may be packaged simultaneously.

<How to use the objective wiping sheet>
The method for using the objective wiping sheet of the present invention is not particularly limited. For example, the sheet may be used in the form of a cloth or a plate as shown in FIG. (For example, burnt dirt) is scraped off, and then turned over, and liquid dirt (for example, oil dirt) can be wiped on the surface of the spunlace nonwoven fabric 2. In this way, dirt, particularly dirt around the kitchen (kitchen) can be easily and efficiently removed with a single sheet.

  Further, as shown in FIGS. 3 and 4, the objective wiping sheet of the present invention may be folded and used. For example, as shown in FIG. 3, the heat-bonding nonwoven fabric 1 is bent outwardly with the surface of the spunlace nonwoven fabric 2 facing inward, and the sheet is reciprocated along the direction of the arrow a, for example. Strong dirt (for example, burnt dirt) can be scraped off on the surface of the adhesive nonwoven fabric 1. At this time, if the surface of the spunlace nonwoven fabric 2 is embossed as illustrated in FIG. 3, the sliding of the spunlace nonwoven fabric 2 folded inward by the frictional force can be significantly suppressed, and thermal bonding is performed. The workability of removing dirt by the nonwoven fabric 1 is greatly improved.

  Thereafter, as shown in FIG. 4, for example, the surface of the used heat-bonding nonwoven fabric 1 is turned inward, the surface of the spunlace nonwoven fabric 2 is turned outward and the sheet is folded back in half, and the sheet is reciprocated along the direction of the arrow b, for example. As a result, liquid stains (for example, oil stains) can be wiped off from the spunlace nonwoven fabric 2 significantly efficiently. At this time, if the surface of the spunlace nonwoven fabric 2 is embossed as described above, the dirt is absorbed or adsorbed in the concave portion, and the dirt can be removed more efficiently. Further, at that time, moderate frictional force is generated between the thermo-adhesive nonwoven fabrics having the fineness of 7.5 dtex or more and 16 dtex or less between the inner facing thermo-adhesive nonwoven fabrics, and the sliding of the thermo-adhesive nonwoven fabric 1 is significantly suppressed. Therefore, the workability of removing dirt by the spunlace nonwoven fabric 2 is greatly improved. Moreover, although the surface of the thermobonding nonwoven fabric 1 can also be embossed, in that case, since the contact area between the nonwoven fabric surfaces decreases, the thermobonding nonwoven fabric 1 may slide on the contrary, and the working efficiency is reduced. There is also.

  In addition, the usage method of the objective wiping sheet | seat of this invention of this invention is not limited to the above-mentioned thing.

<Method of manufacturing objective wiping sheet>
The manufacturing method of the objective wiping sheet of the present invention will be described in detail below.

  Although the manufacturing method of the objective wiping sheet of the present invention includes at least the following steps I to IV, the steps included in the manufacturing method of the present invention are not limited to the following steps I to IV.

Step I: Obtaining a heat-bonded nonwoven fabric Step II: Obtaining a spunlace nonwoven fabric Step III: Laminating the heat-bonded nonwoven fabric and the spunlace nonwoven fabric Step IV: Integrating the heat-bonded nonwoven fabric and the spunlace nonwoven fabric To become

  Hereinafter, each step will be described in detail.

[Step I]
In step I, a heat-bonded nonwoven fabric is obtained. For example, as described above, the heat-bonded nonwoven fabric obtained in the step I first prepares a fiber web containing 20% by mass or more of heat-adhesive fibers having a fineness of 7.5 dtex or more and 16 dtex or less, and constitutes this fiber web. It is obtained by heat-bonding at least a part of intersections of fibers with heat-adhesive fibers, and contains the heat-adhesive fibers in a proportion of 20% by mass or more (note that the above-described fiber web) Are not limited to the above-mentioned heat-adhesive fibers, and may include other fibers (for example, the above-described mixed fibers).

  More specifically, in order to obtain such a heat-bonded nonwoven fabric, in Step I, first, a heat-bondable fiber having a fineness of 7.5 dtex or more and 16 dtex or less, and if necessary, the above-described mixed fiber are prepared. Next, the prepared fibers are uniformly mixed to prepare a fiber web (however, the proportion of the heat-adhesive fibers is 20% by mass or more with respect to the total mass of the fiber web). Such a fiber web can be produced by a conventionally known method. Examples of the fiber web production method include a card method, an airlaid method, a wet papermaking method, a spunbond method, and a melt blown method.

Subsequently, the fibrous web, by a heat treatment at a temperature below Tm _H ° C. When the melting point of the post-spinning the most high melting point thermoplastic resin contained in the heat-adhesive fibers was Tm H _(° C.) or, When the heat-adhesive fiber is a composite fiber, when the melting point after spinning of the thermoplastic resin having the lowest melting point contained in the composite fiber is defined as Tm _{L composite} (° C.), Tm _{L composite} ° C. or higher, Tm _{L composite} + 30 When the melting point after spinning of the thermoplastic resin having the highest melting point is Tm _{H composite} (° C.), the heat treatment is performed at a temperature lower than the Tm _{H composite} . At least a part is thermally bonded. Thereby, the thermobonding nonwoven fabric with which the fiber was integrated is obtained.

  In addition, the preparation method of the above-mentioned thermobonding nonwoven fabric is a mere illustration, and is not limited to the above-mentioned method, What is necessary is just to select and use a conventionally well-known method suitably.

[Step II]
In step II, a spunlace nonwoven fabric is obtained. As described above, the spunlace nonwoven fabric obtained in Step II contains ultrafine fibers having a fineness of 0.6 dtex or less at a ratio of 20% by mass or more with respect to the total mass of the spunlace nonwoven fabric.

  There is no restriction | limiting in particular in the production method of a spunlace nonwoven fabric, For example, what is necessary is just to produce using the spanlace method by a conventionally well-known hydroentanglement process.

  According to such hydroentanglement treatment, fibers can be densely entangled to obtain a nonwoven fabric having a uniform and flat surface, and when a fiber derived from a split-type composite fiber is used as an ultrafine fiber, the split-type composite fiber is used. Can be performed simultaneously with the fiber entanglement.

  The spunlace nonwoven fabric, for example, after producing a fiber web containing the above-mentioned ultrafine fibers (or split-type composite fibers), if necessary, hydrophilic fibers, etc., and subjecting the fiber web to fiber entanglement treatment such as hydroentanglement treatment The fiber web can be dried, and if necessary, it can be produced by thermally bonding the fibers with a low melting point component contained in such fibers.

  The fiber web is made by mixing the constituent fibers. The form of the fiber web may be any form selected from a card web such as a parallel web, a cross web, a semi-random web and a random web, an air lay web, a wet papermaking web, and a spunbond web.

Hydroentanglement treatment is carried out by placing a fibrous web (single layer or multiple layers) on a support and jetting a columnar water stream. Those support surface of the nonwoven fabric is flat, and so does not have an uneven, open area per one does not have an opening of more than 0.2 mm ^2, also not projecting or pattern is formed It is preferable that For example, the support is preferably a plain weave support of 80 mesh or more and 100 mesh or less.

  Hydroentanglement treatment is performed by applying a water flow with a water pressure of 1 MPa or more and 15 MPa or less from a nozzle in which orifices having a hole diameter of 0.05 mm or more and 0.8 mm or less are provided at intervals of 0.3 mm or more and 1.5 mm or less. You may implement by injecting 1-5 times to a back surface, respectively. The water pressure is preferably 1 MPa or more and 10 MPa or less, more preferably 1 MPa or more and 7 MPa or less.

  Next, the fiber web after the entanglement treatment can be subjected to a heat bonding treatment as necessary. The heat bonding process may be a heat treatment that only dries the fiber web containing moisture by the hydroentanglement process described above, or the moisture web is dried by the hydroentanglement process, and the low melting point of the constituent fibers described above. It may be a heat treatment that also serves as a heat bonding treatment with components. The heat treatment of the fiber web subjected to the hydroentanglement treatment can be performed at a temperature of 80 ° C. or higher and 140 ° C. or lower, for example. If the fiber web after hydroentanglement is heat-treated only for the purpose of drying the fiber web, the temperature of the heat treatment is 85 ° C. or higher, preferably the temperature of the low melting point component of the constituent fibers or lower, more preferably 90 ° C. or higher. The heat treatment can be performed at 120 ° C. or lower. When the heat treatment is performed simultaneously with the drying of the fiber web and the thermal bonding treatment with the low melting point component of the constituent fibers, the heat treatment is performed at 125 ° C. or higher and 150 ° C. or lower, preferably above the melting point of the low melting point component of the constituent fibers. The heat treatment can be performed at a temperature of 0 ° C. or lower.

  In the thermal bonding process, when the fiber component other than the low melting point component melts, the adhesion point increases or a large adhesion point is formed, and the flexibility of the nonwoven fabric is impaired, so the temperature is set so that only the low melting point component melts. It is preferable to select. By adjusting the heat treatment temperature, the degree of thermal adhesion by the low melting point component can be changed. The degree of thermal bonding can affect the strength, flexibility, etc. of the nonwoven fabric.

  After the confounding process and before the thermal bonding process, the nonwoven fabric may be subjected to a widening process using a widening roll, if necessary.

[Step III]
In Step III, for example, as shown in FIG. 1, the thermal bonding nonwoven fabric 1 constitutes one surface of the objective wiping sheet 10, and the spunlace nonwoven fabric 2 constitutes the other surface of the objective wiping sheet 10. A heat bonded nonwoven fabric and a spunlace nonwoven fabric are laminated.

  More specifically, as shown in FIG. 2, the spunlace nonwoven fabric 2 is set on one unwinding roll 12 by winding, and the thermobonding nonwoven fabric 1 is set on the other unwinding roll 11 by winding. By simultaneously unwinding and stacking along the direction of the arrow X, the thermal bonding nonwoven fabric 1 and the spunlace nonwoven fabric 2 can be simply and efficiently laminated.

  Moreover, there is no restriction | limiting in particular in the rotation direction of each unwinding roll, and the unwinding direction of each nonwoven fabric here.

  At this time, a tension roll (not shown) or the like may be arranged to adjust the lamination of the thermal bonding nonwoven fabric 1 and the spunlace nonwoven fabric 2.

  In addition, as illustrated in FIG. 2, the nonwoven fabric 1 and the spunlace nonwoven fabric 2 are sandwiched between the pair of metal rolls 13 and 14 (or pressed between the metal rolls 13 and 14) so that these nonwoven fabrics are sandwiched. Can also be laminated. The pressure at this time is not particularly limited as long as these nonwoven fabrics can be laminated.

  In addition, in this invention, the lamination | stacking method of a thermobonding nonwoven fabric and a spunlace nonwoven fabric is not limited to said method.

  Moreover, as above-mentioned, in this invention, you may interpose another layer (for example, another nonwoven fabric layer etc.) between a thermobonding nonwoven fabric and a spunlace nonwoven fabric, and in that case, the other layer is added. The other layer may be unwound along the arrow X so that the other layer is disposed between the thermal bonding nonwoven fabric and the spunlace nonwoven fabric.

[Step IV]
In Step IV, for example, the heat-bonded nonwoven fabric and the spunlace nonwoven fabric are heated in a state where they are laminated as described above, thereby integrating the heat-bonded nonwoven fabric and the spunlace nonwoven fabric.

  At this time, it is preferable that the heat-bonded nonwoven fabric and the spunlace nonwoven fabric are integrated by at least partial bonding by heat-bonding by heating.

  If the heat bonding nonwoven fabric and the spunlace nonwoven fabric can be at least partially integrated, the pressure and heating temperature at that time are not particularly limited. The heating temperature is, for example, the melting point ± 10 ° C. after spinning of the thermoplastic resin having the lowest melting point contained in the heat-bonding fiber contained in the heat-bonding nonwoven fabric, preferably included in the heat-bonding fiber contained in the heat-bonding nonwoven fabric. The integration is preferably performed by heating in the temperature range of the melting point ± 7 after spinning of the thermoplastic resin having the lowest melting point.

  Such heating may be performed by heating one or both of the metal rolls 13 and 14 shown in FIG. 2, for example.

  At this time, for example, as shown in FIG. 2, the thermal bonding nonwoven fabric 1 and the spunlace nonwoven fabric 2 are sandwiched between a pair of metal rolls 13 and 14, and the two nonwoven fabrics are integrated by thermal bonding simultaneously with the above-described lamination. May be used.

  Alternatively, the nonwoven fabric may be integrated by heating using only one of the metal rolls 13 and 14.

(Embossing)
For example, as shown in FIG. 2, using the metal rolls 13 and 14, the heat-bonded nonwoven fabric 1 and the spunlace nonwoven fabric 2 are laminated between the metal rolls 13 and 14 and the heat-bonded nonwoven fabric 1 and the spunlace nonwoven fabric 2 are laminated. When these are integrated by at least partially thermally bonding the heat-bonding nonwoven fabric 1 and the spunlace nonwoven fabric 2 by inserting and heating, the metal roll 13 in contact with the spunlace nonwoven fabric 2 is shown in FIG. As shown, it may be an embossing roll having convex portions on its surface.

  By using the metal roll 13 as an embossing roll, a concave portion having a shape corresponding to the shape of the convex portion of the embossing roll can be formed in the spunlace nonwoven fabric 2. By forming such recesses on the surface of the spunlace nonwoven fabric, the removal efficiency of dirt is improved, and the texture is also improved.

  As the embossing roll, a conventionally known embossing roll can be used without any limitation.

  For example, the height of the convex portion of the embossing roll is usually 0.1 mm or more and 1.5 mm or less, preferably 0.2 mm or more and 1.2 mm or less, more preferably 0.3 mm or more and 1.0 mm. In the following, a cylindrical shape having a cross section of 0.3 mm or more and 0.8 mm or less is particularly preferable, and the diameter of the circle of the cross section is usually 0.5 mm or more and 1.5 mm or less, preferably 0.7 mm or more. It is 3 mm or less, more preferably 0.8 mm or more and 1.2 mm or less. However, the shape of the convex portion is not limited to such a cylindrical shape, and may be, for example, a conical shape, a pyramid shape, a triangular prism shape, a quadrangular prism shape, a hexagonal prism shape, or a hemispherical shape. The linear thing etc. which were continued in the shape may be sufficient.

  The arrangement pattern of the protrusions is not particularly limited, and is preferably arranged at regular intervals, more preferably at regular intervals, and at regular intervals of 1.5 mm or more and 5 mm or less. Particularly preferred. In addition, the space | interval between convex parts means the distance between the centers of the geometric shapes of the cross section of each convex part.

  In addition, the convex part of the embossing roll may penetrate the spunlace nonwoven fabric 2.

  In the embodiment shown in FIG. 2, the metal roll 13 is an embossing roll having a convex portion on the surface thereof, but a metal roll having a flat surface (for example, a metal roll having a flat surface subjected to mirror finishing). It may be.

  By doing so, it is also possible to shape the surface of the spunlace nonwoven fabric 2 substantially flat.

  Here, that the surface of the spunlace nonwoven fabric is substantially flat means that the surface of the spunlace nonwoven fabric produced as described above is separately shaped into a nonwoven fabric such as hot embossing. It means a state in which no recess is formed or less than 30% of the thickness when the thickness of the nonwoven fabric is 100%. In addition, the recessed part does not include a minute recessed part resulting from the fibers contained in the heat-bonded nonwoven fabric or a part where there is no constituent fiber that can be generated when the heat-bonded nonwoven fabric has a low basis weight.

  In the embodiment shown in FIG. 2, the metal roll 14 is a metal roll whose surface is flat (for example, a metal roll whose surface is mirror-finished, etc.).

  Thus, by using a metal roll having a flat surface, the surface of the heat-bonding nonwoven fabric 1 can be formed substantially flat.

  Moreover, the embossing roll which has a convex part on the surface may be sufficient as the metal roll 14 similarly to the metal roll 13 shown in FIG. By doing so, the recessed part of the shape corresponding to the shape of the convex part of an embossing roll can be formed in the surface of the thermobonding nonwoven fabric 1. FIG.

  As described above, when an embossing roll is used in Step IV, the thermal bonding between the thermal bonding nonwoven fabric 1 and the spunlace nonwoven fabric 2 can be performed more strongly around the convex portion of the embossing roll. It is possible to provide a sheet that is difficult to delaminate. In addition, the productivity is improved.

  Thus, in the process IV, the objective wiping sheet | seat of this invention is completed by integrating a heat bonding nonwoven fabric and a spunlace nonwoven fabric.

  If necessary, the objective wiping sheet of the present invention may be impregnated with the above-described cleaning material. There is no particular limitation on the impregnation method of the cleaning material, and it can be performed by a method such as dipping, brushing or spray coating.

  Further, the objective wiping sheet of the present invention may be packaged with an appropriate packaging material and packaged for sale.

  The present invention is described in further detail in the following examples and comparative examples. However, the present invention is not limited to the following examples.

[Example 1]
<Thermal bonding nonwoven fabric>
A heat-bonding nonwoven fabric used for the objective wiping sheet of this example was produced by the following procedure. First, the core-sheath type composite fiber (manufactured by Daiwabo Polytech Co., Ltd.) has a fineness of 11 dtex, a fiber length of 51 mm, a core component made of polypropylene, and a sheath component made of high-density polyethylene. The name “NBF (H)” (composite fiber A) is prepared, and a parallel card web is used to prepare a parallel card web having a basis weight (target weight of the fiber web) of about 20 g / m ² and a core-sheath type composite fiber of 100% by mass. The fiber web was heat-treated at a temperature of 140 ° C. using a hot-air through-type heat treatment machine (air-through processing machine) and heat treated for 20 seconds to form a high-density polyethylene (core-sheath composite fiber constituting the fiber web) The sheath component) was melted and the intersections of the fibers were thermally bonded to obtain a heat-bonded nonwoven fabric having a thickness of 0.5 mm and a basis weight of 20 g / m ² .

<Spunlace nonwoven fabric>
A spunlace nonwoven fabric used for the objective wiping sheet of this example was produced by the following procedure. First, as a fiber constituting the spunlace nonwoven fabric, a split composite fiber having a fineness of 2.2 dtex, a fiber length of 51 mm, and comprising a combination of polyethylene terephthalate / high-density polyethylene (fiber formed by splitting). Among them, the one with the smallest fineness has a fineness of 0.275 dtex), a trade name “DFS (SH)” manufactured by Daiwabo Polytech Co., Ltd.), a fineness of 1.7 dtex, and a fiber length of 40 mm viscose rayon fiber (Manufactured by Daiwabo Rayon Co., Ltd.) was prepared.

Next, using a parallel card machine, a parallel card web having a basis weight (target weight of the fiber web) of about 30 g / m ² and a split-type composite short fiber of 100% by mass was produced. Next, using a parallel card machine, the basis weight (target weight of the fiber web) is about 10 g / m ² , and the viscose rayon fiber (fineness: 1.7 dtex, fiber length: 40 mm) is 100% by mass as the hydrophilic fiber. A card web was prepared and placed on the parallel card web made of the above-mentioned split type composite fiber to obtain a laminated fiber web. Further, using a parallel card machine, a parallel card web having a basis weight (target basis of the fiber web) of about 30 g / m ² and 100% by mass of the above-mentioned split-type composite short fiber is produced, and the viscose rayon of the above laminated fiber web is obtained. The parallel card web made of this split-type composite fiber was placed on the parallel card web made of fiber, and a laminated fiber web having a three-layer structure of split-type composite fiber / viscose rayon fiber / split-type composite fiber was produced. .

Hydroentanglement treatment was performed on the laminated fiber web having the three-layer structure. In the water entangling process, a columnar water flow having a water pressure of 3 MPa is sprayed once on the upper surface of the laminated body using a water jet device provided with nozzles having pore diameters of 0.10 mm provided at intervals of 0.6 mm. Thereafter, using the same water jet device, a columnar water flow having a water pressure of 3 MPa was sprayed once onto the lower surface of the laminate to entangle the fibers, and the split type composite fiber was split. Thereafter, the laminated fiber web was sufficiently dried at 100 ° C. to obtain a spunlace nonwoven fabric. The obtained spunlace nonwoven fabric had a thickness of 0.85 mm and a basis weight of 70 g / m ² .

<Heat embossing>
Using the obtained heat-bonded nonwoven fabric and spunlace nonwoven fabric, both were laminated and integrated, and at the same time, the surface on the spunlace nonwoven fabric side was embossed.
First, the spunlace nonwoven fabric obtained by the above procedure is placed on the heat-bonded nonwoven fabric obtained by the above procedure. Next, a heat-bonding nonwoven fabric and a spunlace nonwoven fabric were inserted between a pair of metal rolls, and the two were integrated. At this time, the surface temperature of both metal rolls is 130 ° C., the metal roll on the side in contact with the thermal bonding nonwoven fabric is a metal roll with a flat surface, and the metal roll on the side in contact with the spunlace nonwoven fabric is on the surface. Cylindrical protrusions with a diameter of 1 mm and a height of 0.5 mm are evenly arranged at intervals of 3 mm in the vertical and horizontal directions (the distance from the center of the circle, which is the cross section of the protrusion, to the center of the circle in the cross section of the adjacent protrusion) It was a metal roll (embossing roll) with a dot pattern. Using these metal rolls, hot embossing was performed by applying a pressure of 2 MPa, and the objective wiping sheet of Example 1 was obtained.

[Example 2]
In the same manner as in Example 1, instead of heat embossing the spunlace nonwoven fabric, the heat bonding nonwoven fabric was embossed to produce an objective wiping sheet.

[Comparative Example 1]
In the same manner as in Example 1, the following composite fiber B was used instead of the composite fiber A as the fiber in the heat-bonded nonwoven fabric, and instead of hot embossing the spunlace nonwoven fabric, the heat-bonded nonwoven fabric was embossed, An objective wiping sheet was prepared.

  Composite fiber B: core-sheath type composite fiber having a fineness of 6.7 dtex, a fiber length of 51 mm, a core component made of polypropylene, and a sheath component made of high-density polyethylene (trade name “NBF (H)” manufactured by Daiwabo Polytech Co., Ltd.) )

[Comparative Example 2]
In the same manner as in Example 1, the following composite fiber C was used in place of the composite fiber A as the fiber in the heat-bonded nonwoven fabric, and instead of embossing the spunlace nonwoven fabric, the heat-bonded nonwoven fabric was embossed, A wiping sheet was prepared.

  Composite fiber C: core-sheath-type composite fiber (fineness: 17 dtex, fiber length: 51 mm, core component: polypropylene, sheath component: high-density polyethylene, trade name “NBF (H)” manufactured by Daiwabo Polytech Co., Ltd.)

[Performance evaluation]
Using the objective wiping sheets of Examples and Comparative Examples, scoring dirt removal performance, liquid dirt removal performance, and slip between sheets were evaluated according to the following criteria.

(Evaluation of scorch dirt removal performance)
In a test piece that artificially reproduces burnt dirt generated in the kitchen (especially around a gas stove), the following burn dirt removal test is performed to calculate the burn dirt removal rate (%), and the removal rate is 95%. The above was evaluated as pass (◯), and less than 95% was rejected (x), and the scorch dirt removal performance was evaluated. The results are shown in the table below.

-Preparation of test piece A stainless steel plate (made of SUS304) (30 mm x 80 mm x 3 mm) was mixed with a mixture of sugar, soy sauce and miso (mixing ratio (weight basis): sugar / soy sauce / miso = 40/44/16). .06 g was applied and baked at 180 ° C. for 120 minutes to prepare a test piece having a burnt stain.

-Burnt dirt removal test Samples of objective wiping sheets (MD 100 mm x CD 50 mm) of Examples and Comparative Examples were impregnated with distilled water (impregnation rate: 200% (weight basis)).
Then, as shown in FIG. 3, it was folded in half in the MD direction with the surface of the heat-bonded nonwoven fabric 1 as the outside and the surface of the spunlace nonwoven fabric 2 as the inside.
The test piece was scraped off the burnt dirt by manually reciprocating the sheet 20 times along the direction of arrow a.
Then, as shown in FIG. 4, the surface of the used heat-bonding nonwoven fabric 1 was set to the inside, and the surface of the spunlace nonwoven fabric 2 was set to the outside, and the sheet was folded in half in the MD direction.
And again, the stain | pollution | contamination on a test piece was wiped off by manually reciprocating a sheet | seat 10 times along the direction of arrow b with respect to the test piece.

-Burnt dirt removal rate The burnt dirt removal rate (%) is calculated according to the following formula.
Removal rate (%) = (A−C) / (A−B) × 100
A: Weight (g) of test piece having burnt dirt
B: Weight of stainless steel plate (g)
C: Weight of test piece after test (g) (however, weight after washing with water and drying)

(Evaluation of liquid dirt removal performance)
The removal performance of the liquid soil was simultaneously evaluated during the above-mentioned burnt soil removal test.
By rubbing the burnt stain artificially reproduced by the above procedure with the surface of the heat-bonding nonwoven fabric of the objective wiping sheet containing distilled water (200% by mass (weight basis)), a part of the burnt stain is placed in distilled water. Dissolved and part of the burnt dirt is finely powdered and mixed in distilled water. Using distilled water mixed or dissolved with this burnt dirt, use the same sheet as that used to remove the burnt dirt, and manually apply the sheet while applying the surface of the spunlace nonwoven fabric to the stainless steel plate as described above. It wiped up by making it reciprocate 10 times. And the surface after wiping up was observed visually, and the removal performance of the liquid stain | pollution | contamination was evaluated according to the following references | standards.
If the liquid residue cannot be confirmed by visual inspection and the surface does not leave a mark after drying, it is accepted (◯). Fine water droplets can be confirmed by visual inspection, but the surface does not leave any marks after drying (△ ), And those that could be confirmed by visual observation that large water droplets remained clearly were evaluated as rejects (x). The results are shown in the table below.

(Evaluation of slip between sheets)
In the above-mentioned removal test for burnt dirt, as shown in FIG. 3, when removing the burnt dirt with the surface of the heat-bonding nonwoven fabric 1 facing outward, the inner spunlace nonwoven fabric 2 is difficult to wipe off and the workability is reduced. Fail (x), the spunlace nonwoven fabric 2 hardly slips and good workability is accepted (○), the spunlace nonwoven fabric 2 slips slightly but does not affect the workability (△) ). The results are shown in the table below.

  From the results of the above-described performance evaluation, it was found that the objective wiping sheets of Examples 1 and 2 of the present invention were excellent in both scorched dirt removal performance and liquid dirt removal performance.

  Surprisingly, as in Comparative Examples 1 and 2, when the fineness of the heat-adhesive fiber contained in the heat-adhesive nonwoven fabric deviates from the range of 7.5 dtex or more and 16 dtex or less as defined in the present invention, removal of burnt dirt is removed. It has also been found that the performance is significantly reduced.

  Moreover, from the comparison between Example 1 and Comparative Examples 1 and 2, by embossing the spunlace nonwoven fabric as in Example 1, the dirt removal workability is further improved, and the burnt dirt is efficiently removed. I knew it was possible.

  The objective wiping sheet of the present invention can be used to clean a kitchen, particularly around a stove such as a gas stove or IH stove, inside a microwave oven, a range such as a microwave oven, or around a ventilation fan. It can be used to remove liquid stains such as oil stains.

  The objective wiping sheet of the present invention can also be used for cleaning outdoor cooking tools such as frying pans, pans, toasters, grilled fish, and barbecue grills.

DESCRIPTION OF SYMBOLS 1 Thermal bonding nonwoven fabric 2 Spunlace nonwoven fabric 10 Objective wiping sheet 11 Unwinding roll of thermal bonding nonwoven fabric 12 Unwinding roll of spunlace nonwoven fabric 13 Metal roll (embossing roll)
14 Metal roll

Claims (12)

An objective wiping sheet comprising at least two non-woven fabrics laminated and integrated with the non-woven fabrics,
In the objective wiping sheet, the nonwoven fabric constituting one surface is a heat-bonding nonwoven fabric, and the nonwoven fabric constituting the other surface is a spunlace nonwoven fabric,
The heat-bonding nonwoven fabric contains 20% by weight or more of heat-bondable fibers with respect to the total weight of the heat-bonding nonwoven fabric,
The fineness of the thermal adhesive fiber is 7.5 dtex or more and 16 dtex or less,
At least a part of the intersections of the fibers constituting the heat-bonding nonwoven fabric is heat-bonded by the heat-bonding fibers,
The spunlace nonwoven fabric contains 20% by mass or more of ultrafine fibers having a fineness of 0.6 dtex or less based on the total mass of the spunlace nonwoven fabric;
Objective wiping sheet.   The objective wiping sheet according to claim 1, wherein the ultrafine fibers are fibers derived from split-type composite fibers.   The sheet for objective wiping according to claim 1 or 2, wherein the spunlace nonwoven fabric contains 50 mass% or more of synthetic fibers with respect to the total mass of the spunlace nonwoven fabric.   The objective wiping sheet according to any one of claims 1 to 3, wherein the spunlace nonwoven fabric contains 60% by mass or less of hydrophilic fibers with respect to the total mass of the spunlace nonwoven fabric.   The objective wiping sheet according to claim 4, wherein the hydrophilic fibers are cellulosic fibers.   The objective wiping sheet according to any one of claims 1 to 5, wherein a surface of the spunlace nonwoven fabric has a recess.   The objective wiping sheet according to any one of claims 1 to 6, wherein a surface of the heat-bonding nonwoven fabric is substantially flat.   The objective wiping sheet according to any one of claims 1 to 7, having a two-layer structure in which the heat-bonded nonwoven fabric and the spunlace nonwoven fabric are laminated and the two nonwoven fabrics are integrated.   The objective wiping sheet according to claim 1, wherein the objective wiping sheet includes a cleaning material of 50 parts by mass or more and 1000 parts by mass or less with respect to 100 parts by mass of the objective wiping sheet.   The objective wiping sheet according to any one of claims 1 to 9, wherein the sheet is used for cleaning in a kitchen, the burnt dirt is removed on the surface composed of the heat-bonding nonwoven fabric, and the spunlace nonwoven fabric is used. Objective wiping sheet for kitchen that removes liquid or gel-like dirt on the surface composed of A method for producing an objective wiping sheet comprising a laminate of at least two nonwoven fabrics and integrating the nonwoven fabrics,
A fiber web containing 20% by mass or more of heat-adhesive fibers having a fineness of 7.5 dtex or more and 16 dtex or less is prepared, and at least a part of the intersection of the fibers constituting the fiber web is thermally bonded by the heat-adhesive fibers. Obtaining a thermally bonded nonwoven fabric containing 20% by mass or more of the thermally adhesive fiber,
A spunlace nonwoven fabric containing ultrafine fibers having a fineness of 0.6 dtex or less, and obtaining a spunlace nonwoven fabric containing 20% by mass or more of the ultrafine fibers with respect to the total mass of the spunlace nonwoven fabric,
The thermobonding nonwoven fabric and the spunlace nonwoven fabric so that the thermobonding nonwoven fabric constitutes one surface of the objective wiping sheet, and the spunlace nonwoven fabric constitutes the other surface of the objective wiping sheet. Laminating,
Heating the heat-bonded nonwoven fabric and the spunlace nonwoven fabric in a laminated state, and integrating the heat-bonded nonwoven fabric and the spunlace nonwoven fabric;
For manufacturing a sheet for objective wiping. The integration of the thermobonding nonwoven fabric and the spunlace nonwoven fabric is performed by inserting the thermobonding nonwoven fabric and the spunlace nonwoven fabric in a laminated state between at least one pair of opposing metal rolls, Including heat-bonding nonwoven fabric and the spunlace nonwoven fabric at least partially thermally bonded, and among the metal rolls, the metal roll in contact with the spunlace nonwoven fabric is an embossing roll having a convex portion on the surface, The metal roll that comes into contact with the thermal bonding nonwoven fabric is a metal roll with a flat surface,
During the thermal bonding, the embossing roll having the convex portion forms a concave portion corresponding to the convex portion of the embossing roll on the surface of the spunlace nonwoven fabric,
The method for producing a sheet for objective wiping according to claim 11, wherein the surface of the thermal bonding nonwoven fabric is formed substantially flat by a metal roll having a flat surface during the thermal bonding.

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