JP7705992B2 - Kitchen roll towel products - Google Patents

Description

The present invention relates to a kitchen roll towel product.

Kitchen towels are widely used for cleaning kitchen appliances such as kitchens, microwave ovens, and stoves, draining and wiping dishes, removing moisture from raw vegetables, meat, fish, and other ingredients, and draining oil from fried foods, and are required to have sufficient water and oil absorption for these uses. For this reason, bulky papermaking techniques have been developed to increase the water and oil absorption of kitchen towels (Patent Documents 1 and 2). However, when bulky kitchen towels are wound into a roll, there is a problem that the roll tends to come loose. When a loosely wound roll is packaged, poor sealing and scorch (holes caused by burning) occur, reducing the aesthetic appeal of the package.

On the other hand, if the roll is wound tightly, poor sealing during packaging and reduced cosmetic appearance of the package are less likely to occur, but the paper is crushed and absorbency is reduced, and the benefits of bulky papermaking technology cannot be obtained. In addition, it is possible to achieve both cosmetic appearance and absorbency of the package by making the basis weight of the kitchen towel excessively high and winding it tightly, but this causes problems such as high costs and the paper becoming stiff and reducing wiping properties. Therefore, there is a demand for a kitchen roll towel product that is easy to use and has excellent cosmetic appearance as a product, in which the kitchen towel is wound into a roll and packaged.

Patent No. 5373208 Special Publication No. 2011-506780

The object of the present invention is to provide a kitchen roll towel product that combines high levels of water absorption and wiping properties, has a pleasant feel when used, and is packaged with excellent cosmetic properties.

As preferred embodiments, the present invention provides the following kitchen roll towel products (1) to (7).
(1) A kitchen roll towel product comprising a kitchen roll towel obtained by winding up a sheet-like kitchen towel which is a two-ply laminate into a roll, and a packaging film for packaging the kitchen roll towel, wherein an adhesive layer is provided at least partially between the plies of the two-ply laminate, the kitchen towel has an uneven pattern derived from a papermaking machine imparted between a head box of the papermaking machine and an inlet of a Yankee dryer, the kitchen towel has a basis weight of 47 g/m2 or ^more and 55 g/m2 ^or less , a water absorption amount of the kitchen towel of 155 g/ m2 or ^more and 520 g/ m2 or ^less , a roll density of 0.04 g/ ^cm3 or more and 0.15 g/cm3 or ^less , the ply peel strength of the kitchen towel sheet is 0.05 N/75 mm or more and 2.0 N/75 mm or less, and the packaging film is a caramel package of one or more rolls.
(2) The kitchen roll towel product of (1) above, wherein the kitchen roll towel further has a plurality of perforations arranged at predetermined intervals in the longitudinal direction and extending in the width direction for cutting the kitchen towel in the width direction, and the area of the kitchen towel enclosed by two adjacent perforations in the longitudinal direction is 0.02 ^m2 or more and 0.10 ^m2 or less.
(3) A kitchen roll towel product according to (1) or (2) above, in which the winding diameter of one roll is 113 mm or more and 200 mm or less.
(4) The kitchen towel of any of (1) to ( ^{3) above, further comprising an embossed pattern different from the uneven pattern derived from the papermaking machine, and the depth of each embossment in the embossed pattern, the depth being 0.10 mm or more and 0.80 mm or less, and having an area of 1 mm2} or more and 40 ^mm2 or less.
(5) The kitchen roll towel product according to (4) above, wherein the embossed pattern includes a plurality of the embossed units, and the number of the embossed units per unit area of 100 ^cm2 is 20 or more and 1,800 or less.
(6) The kitchen roll towel product according to any one of (1) to (5) above, wherein the packaging film has heat sealability.
(7) The kitchen roll towel product according to any one of (1) to (6) above, wherein the thickness of the packaging film is 15 μm or more and 40 μm or less.

The present invention makes it possible to provide a kitchen roll towel product that combines high levels of water absorption and wiping properties, is a roll of kitchen towel that feels good to the touch when in use, and is packaged with excellent cosmetic properties.

FIG. 1 is a perspective view showing a schematic external configuration of a kitchen roll towel product according to a first embodiment of the present invention. FIG. 2 is a perspective view showing a schematic appearance of a roll provided in the kitchen roll towel product of the first embodiment shown in FIG. 1 . FIG. 2 is a diagram showing how to determine the embossed area of the kitchen towel provided in the kitchen roll towel product of the first embodiment shown in FIG. 1. FIG. 1 is a diagram showing a height profile on an XY plane by a microscope using shading. 1 is a graph showing a height profile on an XY plane taken by a microscope. FIG. 1 is a diagram showing how to determine the depth of an embossment having an area of 1 ^mm2 or more and 40 ^mm2 or less. FIG. 2 is a diagram showing a method for measuring the water absorption of a kitchen towel provided in the kitchen roll towel product of the first embodiment shown in FIG. 1. FIG. 2 is a diagram showing a part of a papermaking process for the kitchen towel provided in the kitchen roll towel product of the first embodiment shown in FIG. 1.

The kitchen roll towel product of the present embodiment will be described in detail below with reference to the drawings. Fig. 1 is a perspective view showing the external configuration of a kitchen roll towel product 1 according to a first embodiment. Fig. 2 is a perspective view showing a schematic external view of a kitchen roll towel (roll) 2 provided in the kitchen roll towel product 1 shown in Fig. 1.
Fig. 3 is a diagram showing how to determine the embossed area of the kitchen towel included in the kitchen roll towel product 1 shown in Fig. 1. Fig. 4 is a diagram showing the height profile on the X-Y plane by a microscope in shading. Fig. 5 is a graph showing the height profile on the X-Y plane by a microscope. Fig. 6 is a diagram showing how to determine the depth of an embossing unit having an area of 1 ^mm2 or more and 40 ^mm2 or less. Fig. 7 is a diagram showing a method for measuring the water absorption of the kitchen towel included in the kitchen roll towel product 1 shown in Fig. 1. Fig. 8 is a diagram showing a part of the papermaking process of the kitchen towel included in the kitchen roll towel product 1 shown in Fig. 1.

(Kitchen roll towel products)
As shown in Figures 1 and 2, the kitchen roll towel product 1 of this embodiment is a two-ply laminate, and is a sheet-like kitchen towel 11x (hereinafter also referred to as "kitchen towel sheet 11x") having a rugged pattern derived from a papermaking machine and having a basis weight and water absorption within a predetermined range. The kitchen roll towel 2 (hereinafter also referred to as "roll 2") is obtained by winding up a sheet-like kitchen towel 11x (hereinafter also referred to as "kitchen towel sheet 11x") around a core 10 such as a paper tube or a plastic tube, and two of the kitchen roll towels are aligned in the longitudinal direction and placed side by side to form a caramel package using a packaging film 20.

Here, the uneven pattern derived from the papermaking machine refers to an uneven pattern that is automatically applied between the head box of the papermaking machine and the entrance of the Yankee dryer. The kitchen roll towel product 1 of this embodiment is a package of two kitchen roll towels 2, but is not limited to this, and one or more may be packaged. In the case of more than one, two or three are preferable from the viewpoint of the aesthetic appearance of the package. By caramel packaging the roll of kitchen roll towels 2, sealing failure and scorch (holes caused by burning) are less likely to occur, and the aesthetic appearance of the package is significantly improved. In addition, the caramel packaging also provides excellent strength and ease of opening.

The outer diameter D1 of the core 10 of the roll 2 is not particularly limited, but from the viewpoint of facilitating adjustment of the winding density of the roll 2 and handling of the roll 2 during manufacture, it is preferably 35 mm or more and 45 mm or less, more preferably 37 mm or more and 42 mm or less.
Hereinafter, of the surfaces of the kitchen towel sheet 11x, the surface facing the outside of the roll 2 will be referred to as the roll surface 11a, and the surface that is in contact with the core 20 of the roll 2 or faces the core 20 will be referred to as the roll back surface 11b.

The kitchen towel sheet 11x of this embodiment is a laminate of two plies. In the kitchen towel sheet 11x, an adhesive layer may be provided between the plies to prevent peeling of the plies. The adhesive layer may be provided over the entire surface between the plies, or may be provided only on a portion of the surface. As the adhesive, any known adhesive that does not affect the water absorption or texture of the kitchen towel sheet can be used without any particular limitation, and examples of such adhesive include glue.

In this embodiment, the basis weight of the kitchen towel sheet 11x is 32 g/m2 or ^more and 65 g/ ^m2 or less, preferably 39 g/m2 or ^more and 63 g/m2 or ^less , and more preferably 47 g/ ^m2 or more and 55 g/m2 or ^less . If the basis weight is less than 32 g/ ^m2 , the tactile feel of the kitchen towel sheet 11x during use is reduced. If the basis weight exceeds 65 g/ ^m2 , the kitchen towel sheet becomes hard and does not follow the shape of the object, so the wiping ability is reduced. The basis weight is measured based on JIS P 8124.

In this embodiment, the water absorption of the kitchen towel sheet 11x is 155 g/ m2 or ^more and 520 g/ m2 or ^less , preferably 180 g/ m2 or ^more and 400 g/ m2 or ^less , and more preferably 200 g/ m2 or ^more and 260 g/ m2 or ^less . Here, in the units, "g" indicates the weight of absorbed water, and " m2 ^" indicates the area of the kitchen towel sheet that has absorbed water. If the kitchen towel sheet 11x is made to a size that is easy to handle, if the water absorption is less than 155 ^g / m2 , it may not be possible to wipe off water sufficiently with one ^sheet , and if the water absorption exceeds 520 g/ m2 , the sheet cannot be used effectively and must be discarded even though it has the capacity to absorb water.

The amount of water absorption is measured, for example, as follows. First, a two-ply kitchen towel sheet 11x is taken and cut using a square template with each side measuring 7.6 cm (3 inches) to create a rectangular test piece with each side measuring 7.6 cm. The mass of the test piece before water absorption is measured using an electronic balance. The test piece is set in the holder shown in Figure 7 (a jig that fixes three points of the test piece, made of a metal that does not absorb water).

Distilled water is poured into a commercially available tub to a depth of 2 cm, and the test piece set in the holder is immersed in the distilled water for 2 minutes. After immersion for 2 minutes, the test piece is removed from the distilled water together with the holder, and a band 210 is attached to one corner 200d of the test piece 200 as shown in FIG. 7. The band 210 is made by cutting the same kitchen towel sheet 11x as the sample to be measured into a size of 2 mm wide x 15 mm long, and attaching it to a part 6 mm from the corner 200d toward the center of the test piece. Next, the holder and the test piece 200 are hung on a rod installed in an empty water tank so that the corner 200a opposite the corner 200d is on top, and the lid of the water tank is closed and left for 10 minutes. Then, the holder 220 and the test piece 200 are removed from the water tank, the band 210 and the holder 220 are removed, and the mass of the test piece 200 is measured with an electronic balance. The amount of distilled water absorbed per ^m2 of the test piece (g water/ ^m2 of paper) is calculated from the change in mass of the test piece 200 before and after immersion in distilled water. Measurements are performed five times for each sample, and the average value is used. This measurement is performed according to JIS P 8111 at a temperature of 23±1°C and a humidity of 50±2%. The distilled water is kept at 23±1°C.

The length of the kitchen towel sheet 11x in this embodiment is not particularly limited, but from the viewpoint of the frequency of replacement of the roll 2 and the ease of holding the product 1, it is preferably 20 to 50 m, more preferably 25 to 45 m, and even more preferably 30 to 40 m. The thickness of the kitchen towel sheet 11x is not particularly limited, but from the viewpoint of ease of adjusting the basis weight and water absorption, strength, etc., it is preferably 1.6 mm/10 plies to 4.7 mm/10 plies. The paper thickness is measured using a thickness gauge (a dial thickness gauge "PEACOCK (registered trademark)" manufactured by Ozaki Seisakusho Co., Ltd.). The measurement is performed with a measurement load of 3.7 kPa and a probe diameter of 30 mm, a sample is placed between the probe and the measuring table, and the gauge is read when the probe is lowered at a speed of 1 mm or less per second. Five sets of kitchen towel sheets 11x laminated in two plies are stacked and measured as 10 sheets. The measurement is also repeated 10 times and the measurement results are averaged. The basis weight, absorbency, thickness, etc. of the kitchen towel sheet 11x can be adjusted to a predetermined range by, for example, appropriately adjusting the calendaring conditions, embossing conditions, etc. of the base paper web.

Moreover, the area per sheet of the kitchen towel sheet 11x is preferably 0.02 ^m2 or more and 0.10 ^m2 or less, more preferably 0.03 ^m2 or more and 0.08 ^m2 or less, and even more preferably 0.04 ^m2 or more and 0.06 ^m2 or less. This area is not set alone, but must be set in conjunction with the characteristics of the kitchen towel sheet 11x, particularly the basis weight and water absorption. The kitchen roll towel 2 may have a plurality of perforations at a predetermined interval in the length direction. These perforations extend in the width direction of the kitchen towel sheet 11x and cut the kitchen towel sheet 11x in the width direction. Here, the area surrounded by two adjacent perforations in the longitudinal direction is the area per sheet of the kitchen towel sheet 11x. Moreover, the kitchen towel sheet 11x may or may not have a print.

If the area of each kitchen towel sheet 11x is less than 0.02 ^m2 , the workability and water absorption will decrease, the wiping ability will decrease, and it will be difficult to wipe off the object to be wiped, or one sheet will not be able to wipe it off sufficiently. If the area exceeds 0.10 ^m2 , the sheet will not be used effectively, and there will be a tendency for the sheet to be wasted. More specifically, it is sufficient if one sheet can wipe off one plate, but if the sheet has a high water absorption capacity, for example, 0.8 sheets can wipe off one plate, and 0.2 sheets will be wasted. If the area of one sheet is reduced, the workability and water absorption will decrease, and the wiping off of water will be insufficient. In this embodiment, by setting the optimal water absorption capacity, etc., when the sheet area is set to be easy to work with, the kitchen towel sheet 11x can be made highly convenient.

In this embodiment, the kitchen towel roll 2 in which the kitchen towel sheet 11x is wound into a roll shape has a roll density of 0.04 g/cm ³ or more and 0.15 g/cm ³ or less. It is necessary to set the roll density according to the basis weight and water absorption of the kitchen towel sheet 11x, rather than setting the range of the roll density alone. If the roll density is less than 0.04 g/cm ³ , the top and/or bottom surfaces cannot be folded neatly when wrapping the caramel, and unbonded parts may be generated, scorching may occur, and the cosmetic properties may be impaired. If the roll density exceeds 0.15 g/cm ³ , the kitchen towel sheet may be crushed and the water absorption may decrease when the roll diameter is constant.

The roll density can be measured, for example, by the following method. First, the roll volume is expressed as {{cross-sectional area of the roll outer diameter ( winding diameter DR) portion}-(cross-sectional area of the core outer diameter DI portion)}×roll width (converted per 206 mm). For example, when the roll mass per 206 mm of roll width is 327 g, the winding diameter DR is 122 mm, and the core outer diameter is 39 mm, the roll density = 327 g ÷ [{3.14 × (122 mm ÷ 2 ÷ 10) ² - 3.14 × (39 mm ÷ 2 ÷ 10) ² } × (206 mm ÷ 10)] = 0.15 g/cm ^3. If the kitchen roll towel 2 does not have a core, the diameter of the central hole is replaced with the core outer diameter DI.

With regard to the kitchen roll towel 2 of this embodiment, the roll diameter per roll of the kitchen roll towel 2 is preferably 113 mm or more and 200 mm or less, more preferably 135 mm or more and 180 mm or less, and even more preferably 140 mm or more and 160 mm or less. If the roll diameter is less than 113 mm, it tends to be difficult to adjust the roll density and the water absorption amount of the kitchen towel sheet 11x in a good balance to a good range. If the roll diameter exceeds 200 mm, the roll density and therefore the cosmetic properties of the packaging tend to decrease.

The kitchen towel sheet 11x of this embodiment may have an embossed pattern in addition to the uneven pattern derived from the papermaking machine. Such an embossed pattern can be easily formed, for example, by embossing. The kitchen towel sheet 11x of this embodiment may also be one in which a single ply sheet is embossed and then two plies are laminated. When laminating two plies, it is preferable to use a ply bond glue (adhesive) and apply the glue to perform the adhesive treatment. By bonding in this way to form two plies, the adhesion of the plies is strengthened, and the kitchen towel sheet 11x is less likely to tear without peeling off even when it gets wet.

The ply on the surface 11a of the kitchen towel sheet 11x is preferably provided with a dot-shaped embossed pattern. By providing the dot-shaped embossed pattern on the surface 1a, the embossed portions of the embossed pattern can be applied with glue for adhesion treatment, making it difficult for the ply of the kitchen towel sheet 11x to peel off and suppressing large fluctuations in the amount of water absorbed.

(Ply Peel Strength)
The ply peel strength of the kitchen towel sheet 11x is preferably 0.05 N/75 mm or more and 2.0 N/75 mm or less, more preferably 0.10 N/75 mm or more and 1.5 N/100 mm or less, and even more preferably 0.15 N/75 mm or more and 1.0 N/75 mm or less. If the ply peel strength is less than 0.05 N/75 mm, the plies will peel off from each other, making wiping difficult, and if the ply peel strength exceeds 2.0 N/75 mm, the water absorption of the kitchen towel sheet 1x will be poor.

The method for measuring the ply peel strength is based on the tensile test method of JIS P 8113, using a tensile tester (STB-1225S, manufactured by A&D Co., Ltd.) under the standard conditions specified in JIS P 8111. First, a test piece measuring 75 mm in the width direction and 200 mm in the machine direction is taken from a sample of kitchen towel sheet 11x. Next, the ply is peeled off 35 mm in the machine direction. One side of the peeled ply is clamped and fixed by an upper gripper (width 75 mm) for 15 mm in the machine direction. The other ply is also clamped and fixed by a lower gripper (width 75 mm) for 15 mm in the machine direction. The pitch (spacing) of the grippers is 20 mm. Next, the ply is pulled (peeled off) at a pulling speed of 100 mm/min, and strength data is collected. Strength data is obtained every 20 μm, and the data from 40 mm to 150 mm (measurement length 110 mm) after the start of measurement is averaged to determine the peel strength (N/75 mm). However, if the perforation is included in the distance from 40 mm to 150 mm after the start of measurement, the distance from the start of measurement can be shortened from 40 mm to, for example, 90 mm (measurement length 50 mm) as long as it does not include the perforation.

In the embossing pattern, an embossment having an area of 1 ^mm2 or more and 40 ^mm2 or less is defined as an embossed unit. The number of embossed units per unit area of 100 ^cm2 in the embossing pattern is not particularly limited, but is preferably 20 or more and 1800 or less, more preferably 50 or more and 1000 or less, and even more preferably 80 or more and 500 or less. If the number of embossed units is less than 20, the plies tend to peel off easily in the case of the kitchen towel sheet 11x having good water absorption as in this embodiment. If the number of embossed units exceeds 1800, the kitchen towel sheet 11x tends to be crushed and the water absorption amount tends to decrease. In addition, the shape of the embossed unit can be used without any particular limitation, such as a circle, an ellipse, a rectangle, a square, a floral pattern, etc.

In the embossing pattern, the depth of the embossed portion having an area of 1 ^mm2 to 40 ^mm2 is preferably 0.10 mm to 0.80 mm, more preferably 0.25 mm to 0.67 mm, and even more preferably 0.35 mm to 0.55 mm. If the depth of the embossed portion of the kitchen roll towel 11x is less than 0.10 mm, the water absorption of the kitchen towel sheet 11x tends to decrease and the touch during use tends to be poor, while if it exceeds 0.80 mm, the kitchen towel sheet 11x tends to become bulky, the roll density tends to decrease, and the cosmetic properties of the package tend to decrease.

The area and depth of the embossment are measured using a microscope. The microscope used is a KEYENCE One-Shot 3D Measuring Macroscope VR-3100. The microscope image observation, measurement, and image analysis software can be VR-H1A. The measurement conditions are a magnification of 12x and a field of view of 24mm x 18mm. The measurement magnification and field of view can be changed as appropriate depending on the desired size of the embossment.

As shown in Fig. 3, the area of the embossment is calculated by measuring the length a of the longest part of the periphery fr of the embossment and the length b of the longest part in the direction perpendicular to the length a, and calculating the area as a x b. Fig. 4 shows a height profile on the XY plane taken by a microscope, in which the height of the sheet surface is represented by shading. The roughly elliptical areas in Fig. 4 that are different in shading from the surroundings indicate individual embosses, and the length a of the longest part of one of these embossments can be visually identified. The number of embossments per 100 ^cm2 is counted for embossment units with an area of 1 ^mm2 to 40 ^mm2 .

The number of embossments is measured by visually selecting an arbitrary 100 cm2 area from the entire area between two adjacent perforations in the longitudinal direction across the entire width of the sheet. If it is not possible to select an area of 100 ^cm2 because knurling (edge embossing) has been performed, for example, the number of ^embossments is measured in measurable areas excluding areas that cannot be measured due to knurling (edge embossing) or the like, and converted into the number of embossments per 100 ^cm2 .

Next, the depth of the embossment is measured for each embossment unit having an area of 1 ^mm2 or more and 40 ^mm2 or less. The depth of the embossment is obtained by measuring the height difference of the embossment using the microscope. First, a line segment AB is drawn as shown in Figure 4 to obtain a height profile as shown in Figure 5. The line segment AB may be drawn so as to cross the embossment. The height profile is a (measured) cross-sectional curve S that represents the unevenness of the actual sheet sample surface, but it also contains noise (steep peaks due to fiber lumps on the sheet surface, fibers that grow in a whisker-like shape, or areas without fibers), and it is necessary to remove such noise peaks when calculating the height difference of the unevenness.

Then, as shown in Figure 6, a "contour curve" W is calculated from the cross-sectional curve S of the height profile, and of this contour curve W, the difference between the average value of bottoms P1 and P2 and the apex sandwiched between bottoms P1 and P2 is calculated, and this is taken as the embossing depth D1. Similarly, the difference between the average value of bottoms P2 and P3 and the apex sandwiched between bottoms P2 and P3 is calculated, and this is taken as the embossing depth D2. D3 is measured in the same manner. Note that D1, D2, and D3 are measured at consecutive locations as shown in Figure 6. This measurement is performed at 10 locations on the kitchen towel sheet 11x, and the average value of the data from a total of 30 locations is taken as the embossing depth. In addition, if the distance between the embossments (the distance between P1 and P2) is 1 cm or more, instead of measuring at consecutive points, the difference between the average value of the bottoms P1 and P2 and the top sandwiched between the bottoms P1 and P2 is calculated, and this is taken as the emboss depth D1. D1 can also be measured at 30 points and the average value taken as the emboss depth.

The "contour curve" is a curve obtained by removing surface roughness components with wavelengths shorter than λc: 800 μm (where λc is the "filter that defines the boundary between roughness and waviness components" as described in JIS B 0601 "3.1.1.2") from the cross-sectional curve using a low-pass filter. Note that if λc is set to be greater than the distance between adjacent embossments P1 and P2, and P2 and P3 (called the emboss pitch), there is a risk that the peaks will be recognized as noise, so λc is set to be less than the emboss pitch. For example, if the emboss pitch is 800 μm or less, λc is set to, for example, 250 μm.

When measuring the embossing, the measurement surface is the front side, and when selecting the embossing, the measurement is made at a portion that is 10% of the roll length of the kitchen towel roll 1 from the end of the outer winding of the kitchen towel roll 1 (the position where the use of the kitchen towel sheet 1x begins). For example, if the roll length is 30m, the measurement is made at a portion that is 30m x 10% = 3m from the end. Note that if the 10% portion of the roll length corresponds to the perforation, the measurement is made on the outer winding side of the perforation.

There is no particular restriction on whether the ply on the back surface 1b of the kitchen towel sheet 11x has an embossed pattern, so long as it has a pattern of protrusions and recesses derived from the papermaking process that is different from the embossed pattern. It may have nested embossing or pin-to-pin embossing, or may not be embossed, but preferably has nested embossing or no embossing, and more preferably no embossing.

For example, a resin film having heat sealability is used as the packaging film 20. The thickness of the packaging film is preferably 15 μm or more and 40 μm or less. If the thickness is less than 15 μm, scorching occurs during heat sealing, which reduces the aesthetic appeal and the film tends to tear. Furthermore, if the thickness exceeds 40 μm, the ease of opening tends to decrease. The packaging film 20 is not particularly limited as long as it has heat sealability, but for example, a polyethylene film is preferable.

In addition to the above-mentioned physical properties, the kitchen towel sheet 11x of this embodiment preferably has the following physical properties.
(DMDT and DCDT)
The dry machine direction tensile strength DMDT (Dry Machine Direction Tensile Strength) of the kitchen towel sheet 11x based on JIS P 8113 is preferably 5N/25mm or more and 24N/25mm or less, more preferably 8N/25mm or more and 19N/25mm or less, and even more preferably 10N/25mm or more and 16N/25mm or less, from the viewpoint of wiping properties, etc. Also, the dry cross direction tensile strength DCDT (Dry Cross Direction Tensile Strength) is preferably 3N/25mm or more and 19N/25mm or less, more preferably 5N/25mm or more and 14N/25mm or less, and even more preferably 6N/25mm or more and 12N/25mm or less, from the viewpoint of wiping properties, etc. If the DMDT is less than 5 N/25 mm or the DCDT is less than 3 N/25 mm, the kitchen towel sheet 11x tends to tear easily when absorbing water, resulting in reduced wiping properties. If the DMDT exceeds 24 N/25 mm or the DCDT exceeds 19 N/25 mm, the density of the kitchen towel sheet 11x increases, and as the water absorption decreases, the wiping properties decrease, or the sheet tends to become hard and the wiping properties decrease.

(WMDT and WCDT)
The wet machine direction tensile strength (WMDT) of the kitchen towel sheet 11x based on the former JIS S 3104 is preferably 1.3 N/25 mm or more and 7.0 N/25 mm or less, more preferably 2.0 N/25 mm or more and 6.0 N/25 mm or less, and even more preferably 2.5 N/25 mm or more and 5.0 N/25 mm or less, from the viewpoint of wiping ability, etc. In addition, the wet cross direction tensile strength WCDT (Wet Cross Direction Tensile Strength) is preferably 0.7 N/25 mm or more and 5.5 N/25 mm or less, more preferably 1.0 N/25 mm or more and 4.0 N/25 mm or less, and even more preferably 1.8 N/25 mm or more and 3.5 N/25 mm or less, from the viewpoint of wiping properties, etc. If the WMDT is less than 1.3 N/25 mm or the WCDT is less than 0.7 N/25 mm, the kitchen towel sheet 1x tends to be easily torn when absorbing water, and the wiping properties tend to decrease. If the WMDT exceeds 7.0 N/25 mm or the WCDT exceeds 5.5 N/25 mm, the density of the kitchen towel sheet 11x increases, and the wiping properties tend to decrease with the decrease in water absorption, or become hard and the wiping properties tend to decrease.

(specific volume)
From the viewpoint of the feel during use, the specific volume of the kitchen towel sheet 11x is preferably 6 cm ³ /g or more and 16 cm ³ /g or less, more preferably 8 cm ³ /g or more and 14 cm ³ /g or less, and even more preferably 9 cm ³ /g or more and 13 cm ³ /g or less. If the specific volume of the kitchen towel sheet 11x is less than 6 cm ³ /g, the water absorption amount of the kitchen towel sheet 11x and the feel during use tend to decrease, and if it exceeds 16 cm ³ /g, the kitchen towel sheet 11x becomes bulky, the feel during use tends to decrease, and the improvement of the water absorption amount tends to be insufficient. The specific volume is a value expressed in volume cm ³ per unit g by dividing the paper thickness per kitchen towel sheet 11x by the basis weight.

(Method of manufacturing kitchen towel sheet and kitchen towel roll)
The kitchen towel sheet 11x and the kitchen roll towel 2 can be manufactured, for example, in the following order: (1) papermaking and creping, (2) embossing, and (3) roll winding. It is preferable not to use through-air dryer technology in the manufacturing process. Each step will be described below.

In the papermaking process, a rugged pattern derived from the papermaking process, which is different from the embossed pattern described above, is applied to the kitchen towel sheet 11x. This rugged pattern further increases the water absorption of the kitchen towel sheet 11x. Note that the rugged pattern is derived from the papermaking process means that the rugged pattern is applied between the head box of the papermaking machine and the entrance of the Yankee dryer in the papermaking process of the kitchen towel sheet 1x. Specifically, in a part of the papermaking process shown in FIG. 9, the rugged pattern can be applied by the belt press section 30, which is arranged between the dewatering roll 31 and the Yankee dryer 32. In the belt press section 30, the wet paper 34 and the rugged belt 33 (the rugged belt 33 loops between the belt press section 30 and the Yankee dryer 32) are pressed together to apply the rugged pattern to the wet paper.

The uneven pattern can be changed as needed by changing the belt pattern (fine pattern, coarse pattern). Changing the uneven pattern will change the specific volume (paper thickness), but it is preferable to select a pattern that brings the specific volume (paper thickness) of the base paper within the numerical range described below.

At this time, the basis weight of the two plies of base paper used in the manufacture of the kitchen towel sheet 11x is preferably 33 g/m ² or more and 68 g/m ² or less, more preferably 39 g/m ² or more and 63 g/m ² or less, and even more preferably 47 g/m ² or more and 55 g/m ² or less. The paper thickness is preferably 1.3 mm/10 sheets or more and 4.5 mm/10 sheets or less, more preferably 1.7 mm/10 sheets or more and 3.5 mm/10 sheets or less, and even more preferably 2.0 mm/10 sheets or more and 3.0 mm/10 sheets or less. Furthermore, the specific volume is preferably 6 cm ³ /g or more and 16 cm ³ /g or less, more preferably 7 cm ³ /g or more and 15 cm ³ /g or less, and even more preferably 9 cm ³ /g or more and 13 cm ³ /g or less. In addition, in order to improve water absorption, the thickness of kitchen towel sheet 11x is preferably greater than the thickness of the base paper, and the specific volume of kitchen towel sheet 11x is preferably greater than the specific volume of the base paper.

The kitchen roll towels 2 thus obtained are then wrapped in a wrapping film 20 in a caramel-wrap style, as shown in FIG. 1, with one or more of them aligned longitudinally and arranged side by side in the width direction, according to a known method.

The present invention is not limited to the above-described embodiments, and it goes without saying that various modifications and equivalents fall within the spirit and scope of the present invention.

Kitchen roll towel products of Examples 1 to 25 and Comparative Examples 1 to 12 were manufactured through the steps of (1) papermaking and creping, (2) embossing, (3) roll winding, and (4) caramel packaging. Parameters were measured and sensory evaluations were performed for all of the kitchen towel roll products of the above Examples and Comparative Examples. The results are shown in Tables 1 to 5. The kitchen towel sheets of Examples 1 to 25 and Comparative Examples 1 to 12 had uneven patterns derived from the papermaking machine.

The sensory evaluation was carried out by 20 monitors who selected "good" or "bad" for each evaluation item. The evaluation criteria are as follows: ◎, ○, and △ were considered to be acceptable.
◎: When there are 18 to 20 people who choose "Good" ○: When there are 14 to 17 people who choose "Good" △: When there are 10 to 13 people who choose "Good" ×: When there are 6 to 9 people who choose "Good" ××: When there is no "Good" or when there are 1 to 5 people who choose "Good"

Each evaluation item will be explained.
<Water absorption amount per sheet (in each table, it is written as "Water absorption amount/sheet")>
The monitors evaluated how much water remained on the surface after using one sheet.
<Can the sheets be used without waste? (In each table, this is referred to as "efficiency")
The subjects used one sheet and evaluated whether they felt it was a waste to discard it.
<Cosmetic>
The occurrence of scorch and non-bonded areas was visually evaluated.
<Film tear resistance (in each table, this is referred to as "tear resistance")>
The products were evaluated for their resistance to tearing when displayed and carried by hand.
<Openability>
The ease of opening the film by tearing it with fingers or by making a hole in it was evaluated.
<Wipeability>
The ease of wiping was evaluated when the monitors used the product.
<Tactile sensation when in use>
The monitors evaluated the quality of the tactile sensation when using the product.

From the above, it can be seen that according to the present invention, by setting the basis weight, water absorption amount, sheet area, roll density of the kitchen roll towel roll (roll), thickness of the packaging film, etc. of the kitchen towel sheet within the ranges described in the claims, it is possible to produce a kitchen towel that has a high level of both water absorption and wiping properties and has a good feel when used, and to package the wound roll with excellent cosmetic properties and commercialize it.

REFERENCE SIGNS LIST 1 kitchen roll towel product 2 kitchen roll towel 10 core 20 packaging film 11a front surface 11b back surface 11x kitchen towel sheet 30 belt press section 31 dewatering roll 32 Yankee dryer 33 uneven belt 34 wet paper 200 test piece 200a, 200d corner portion 210 belt 220 holder

Claims (7)

A kitchen roll towel product comprising a kitchen roll towel formed by winding a sheet-like kitchen towel that is a two-ply laminate into a roll, and a packaging film for packaging the kitchen roll towel,
An adhesive layer is provided between at least a portion of the plies of the two-ply laminate,
The kitchen towel has a papermaking machine-derived uneven pattern provided between a head box of the papermaking machine and an inlet of a Yankee dryer, the kitchen towel has a basis weight of 47 g/m2 ^or more and 55 g/m2 ^or less , a water absorption amount of 155 g/ m2 or ^more and 520 g/ m2 or ^less , and a roll density of 0.04 g/ ^cm3 or more and 0.15 g/ ^cm3 or less,
The ply peel strength of the kitchen towel sheet is 0.05 N/75 mm or more and 2.0 N/75 mm or less,
A kitchen roll towel product, which is one or more rolls of caramel wrapped in the wrapping film. 2. The kitchen roll towel product according to claim 1, wherein the kitchen roll towel further has a plurality of perforations arranged at predetermined intervals in the longitudinal direction and extending in the transverse direction for cutting the kitchen towel in the transverse direction, and the area of the kitchen towel enclosed by two adjacent perforations in the longitudinal direction is 0.02 ^m2 or more and 0.10 ^m2 or less. The kitchen roll towel product according to claim 1 or 2, in which the diameter of one roll is 113 mm or more and 200 mm or less. The kitchen towel product according to any one of claims 1 to 3, wherein the kitchen towel further has an embossed pattern different from the uneven pattern derived from the papermaking machine, and the depth of each embossment having an area of 1 ^mm2 or more and 40 ^mm2 or less in the embossed pattern is 0.10 mm or more and 0.80 mm or less. The kitchen roll towel product according to claim 4 , wherein the embossed pattern includes a plurality of the embossed units, and the number of the embossed units per unit area of 100 ^cm2 is 20 or more and 1800 or less. The kitchen roll towel product according to any one of claims 1 to 5, wherein the packaging film has heat sealability. The kitchen roll towel product according to any one of claims 1 to 6, wherein the thickness of the packaging film is 15 μm or more and 40 μm or less.