WO2018061315A1 - Kitchen paper - Google Patents

Abstract

Kitchen paper having a first sheet and a second sheet integrated in a nested form, the surfaces thereof that form embossed protrusions facing each other, said first sheet having a plurality of first embossed protrusions and corresponding first embossed recessions formed on the front and rear thereof and said second sheet having a plurality of second embossed protrusions and corresponding second embossed recessions formed on the front and rear thereof. The first and second embossed recessions both have the same non-point-symmetrical shape in the planar view. The second embossed recessions are arranged, rotated by 180°C relative to the first embossed recessions in the planar view, between the first embossed recessions. The centers of gravity of both the first embossed recessions and the second embossed recessions are arranged on a first straight line.

Description

Kitchen paper

The present invention relates to kitchen paper.

Some conventional kitchen paper has a laminated structure in which sheets of crepe paper or the like subjected to embossing are laminated. In this kitchen paper, a space for holding oil and the like is provided between the stacked sheets in order to impart oil and moisture absorption performance. Also, in this type of kitchen paper, the part where the embossed irregularities of the sheet are not opposite is formed on the line, and the oil is passed through this part, so that the absorption rate of the oil is increased. Yes.

Some kitchen papers have a structure formed by laminating two sheets of crepe paper that are embossed to form a convex portion on one surface and a concave portion corresponding to the convex portion on the other surface. And the laminated structure in such kitchen paper has a tip-to-tip type in which the tops of the convex parts of two crepe papers are bonded to each other, and the top part of the convex part of one of the crepe papers. The other crepe paper is divided into the Nested type in which the convex portions are alternately positioned and bonded so that they are located at portions that are not convex portions (positions that are not convex when viewed from one facing crepe paper). It is done.

For example, FIG. 2 of Japanese Patent Publication No. 6-28951 (Patent Document 1) discloses sanitary paper such as kitchen towels having a laminated structure in the Tip to Tip format. U.S. Pat. No. 8,409,404 (Patent Document 2) discloses a kitchen paper having a nested structure.

Japanese Patent Publication No. 6-28951 U.S. Pat. No. 8,409,404

However, the structure of Patent Document 1 (tip-to-tip type laminated structure) has a large area in contact with the object of use such as tableware and foodstuffs, and embossed space (a part where non-embossed parts face each other) when a load is applied during use. Is easy to collapse. For this reason, the oil or the like is hardly absorbed into the kitchen paper, and the oil or the like held in the space in the kitchen paper is likely to ooze out.

In addition, the structure of Patent Document 2 (nested type laminated structure) can reduce the contact area with the object to be used compared with the tip-to-tip type laminated structure, but the embossing space is small, so that Even when the embossed space is crushed slightly when it is subjected to a load, it is difficult to absorb the oil and the like, and the absorbed oil oozes out.

An object of the present invention is to provide a kitchen sheet in which the absorption performance is hardly lowered even when a load is applied during use.

In order to solve the above-described problem, according to one embodiment, the first embossed convex portion and the corresponding first embossed concave portion are formed on the front and back surfaces, and the second embossed convex portion corresponds to the first sheet. A kitchen paper in which a plurality of second sheets each having a plurality of second embossed recesses formed on the front and back are integrated in a nested manner with the formation surface of the embossed projections facing each other, wherein the first and second The embossed recesses of the first and second embossed recesses have the same shape that is asymmetrical in a plan view, and the second embossed recesses are rotated by 180 ° in a plan view with respect to the first embossed recesses. A kitchen paper is provided in which the center of gravity of each of the first embossed recess and the second embossed recess is arranged on a first straight line.

According to one embodiment of the present invention, it is possible to provide kitchen paper in which the absorption performance is unlikely to deteriorate even when a load is applied during use.

It is a figure which shows the kitchen paper which concerns on embodiment (Example 1) of this invention. It is the figure which expanded a part (P1 part) of FIG. 2A is a cross-sectional view taken along line AA in FIG. 2, and FIG. 2B is a cross-sectional view taken along line BB in FIG. (A)-(K) are figures which show the modification of the unit embossing which comprises the embossing pattern of the kitchen paper which concerns on embodiment of this invention. It is the figure which expanded a part of embossing pattern of the kitchen paper which concerns on embodiment (modification 1) of this invention. It is a figure which shows the embossing pattern of the kitchen paper which concerns on embodiment (modification 2) of this invention. It is the figure which expanded a part of embossing pattern of the kitchen paper which concerns on embodiment (modification 3) of this invention. It is a figure which shows the embossing pattern of the kitchen paper which concerns on embodiment (modification 4) of this invention. It is a figure explaining the method of the attenuation test at the time of a load. It is a figure explaining the measuring method of oil absorption performance. It is a figure which shows the kitchen paper which concerns on the comparative example 1. FIG. It is the figure which expanded a part (P2 part) of FIG. (A) is a sectional view taken along the line CC in FIG. 12, and (B) is a sectional view taken along the line DD in FIG. It is a figure which shows the kitchen paper which concerns on a reference example. It is the figure which expanded a part (P3 part) of FIG. (A) is a cross-sectional view taken along line EE in FIG. 15, and (B) is a cross-sectional view taken along line FF in FIG.

The first aspect of the present invention includes a first sheet in which a plurality of first embossed convex portions and corresponding first embossed concave portions are formed on the front and back sides, and a second embossed surface corresponding to the second embossed convex portions. A kitchen paper in which a plurality of concave sheets and second sheets formed on the front and back sides are integrated in a nested manner with the formation surfaces of the embossed convex parts facing each other, wherein the first and second embossed concave parts are flat. The second embossed recesses are arranged between the first embossed recesses in a form that is both astigmatic in view and rotated 180 ° in plan view with respect to the first embossed recesses. The center of gravity of each of the first embossed recess and the second embossed recess is aligned on a first straight line.

In this specification, an asymmetrical shape means a shape that does not overlap with the original shape when rotated 180 ° around a certain point.

In the first aspect of the present invention, the center of gravity is aligned on the first straight line in a direction in which the first embossed recess and the second embossed recess that are asymmetrical in plan view are rotated by 180 ° with respect to each other. Is arranged. As a result, a portion having a high strength between the first embossed recess and the second embossed recess as viewed on the straight line (the portion of the second embossed recess corresponding to the second embossed recess), oil content, etc. Since the portion to be absorbed (the embossed space formed between the first embossed concave portion and the second embossed concave portion) can be arranged in a balanced manner at the same ratio, the embossed space is hardly crushed.

As a result, it is possible to secure a space between the stacked sheets even when using kitchen paper, and to prevent a decrease in oil holding power due to a load. Moreover, since it is a nested type laminated structure, the contact area with the object to be used can be reduced, and the space in the kitchen paper is not easily crushed even when a load is applied during use.

In addition, since the absorption speed can be maintained without providing a line-shaped space (hereinafter referred to as a line) without embossed irregularities between the embossed blocks, the embossed space can be increased, so oil is absorbed. The space to do can be enlarged. Further, the basis weight and paper thickness can be reduced, and the thickness of the kitchen paper can be reduced.

In the second aspect of the present invention, the respective centroids of the other first embossed recesses and the other second embossed recesses are arranged on a second straight line parallel to the first straight line. The other second embossed recesses are arranged so as to face the first embossed recesses on the first straight line and are rotated by 180 ° in a plan view with respect to the first embossed recesses. ing.

The other first embossed recesses and the other second embossed recesses have the same emboss structure as the first embossed recesses and the second embossed recesses arranged on the first straight line.

In the second aspect of the present invention, as in the first aspect, each of the other first embossed recesses and the other second embossed recesses that are astigmatic in plan view are rotated by 180 °, respectively. Are arranged so that their center of gravity is aligned on a second straight line parallel to the first straight line.

Thereby, even between other 1st embossing recessed parts and other 2nd embossing recessed parts, a high intensity | strength part (part of 2nd embossing recessed part corresponding to a 2nd embossing convex part), an oil component, etc. are absorbed. Since the portions (the embossed spaces formed between the other first embossed recesses and the second embossed recesses) can be arranged in a balanced manner at the same ratio, the embossed spaces are not easily crushed.

In addition, in the second aspect, the other second embossed recess faces the first embossed recess in a form rotated by 180 ° in a plan view with respect to the first embossed recess on the first straight line. Are arranged to be. In this case, the other first embossed recess is arranged so as to face the second embossed recess in a form rotated by 180 ° in a plan view with respect to the second embossed recess on the first straight line.

In such an arrangement, the first embossed concave portion on the first straight line and the other second embossed concave portion on the second straight line are portions with relatively strong strength in an asymmetrical shape in plan view. Opposite. On the other hand, the second embossed concave portion on the first straight line and the other first embossed concave portion on the second straight line face each other at a relatively weak strength in an asymmetrical shape in plan view. Then, the distance between the relatively strong portions in the asymmetrical shape in plan view is relatively short, and the distance between the relatively weak portions is relatively long.

Therefore, according to the second aspect, an asymmetrical shape is formed between the first embossed recess and the second embossed recess and between the other first embossed recess and the other second embossed recess. The portions having a difference in strength can be arranged with good balance. Therefore, it is possible to make the embossed space difficult to be crushed by the entire kitchen paper, and it is possible to reliably prevent a decrease in holding power such as oil due to a load.

Further, in the structure in which such a portion having a difference in strength is arranged, the first embossed concave portion on the first straight line and the other second embossed concave portion on the second straight line (the strength is relatively strong). A portion having a high strength can be formed in a portion where the distance between the portions is relatively short. On the other hand, between the 2nd embossing crevice on the 1st straight line, and the other 1st embossing crevice on the 2nd straight line (the part where the distance between the comparatively weak parts is comparatively long) Then, the embossing space can be widened.

Therefore, according to the second aspect, the first embossed recess and the second embossed recess aligned on the first straight line and the other first embossed recess and the other second emboss aligned on the second straight line Between the recess, a portion with high strength (a portion where the first embossed recess and the other second embossed recess face each other) and a portion with a high retention amount of oil or the like (the second embossed recess and the other first The portion facing the embossed concave portion) can be arranged in a balanced manner at the same ratio. Thereby, even when it is loaded, the embossed space of the kitchen paper is not easily crushed, and the holding power for oil and the like can be maintained high.

In the third aspect of the present invention, the shape that is asymmetric with respect to the plane is a regular triangle. In the present specification, the equilateral triangle shape includes not only a shape in which the apex of the equilateral triangle forms a corner portion but also a shape in which the apex of the equilateral triangle is rounded in a curved shape.

¡By making the shape of each embossed recess into a regular triangle shape in plan view, the strength of the emboss itself can be increased. Therefore, even if a load is applied at the time of use, the embossed space is not easily crushed, and the kitchen paper in which the absorption performance is not easily lowered can be reliably obtained.

In the fourth aspect of the present invention, the asymmetric shape in plan view is a polygonal shape. By making the shape of each embossed recess into such a polygonal shape, variations in the shape of the embossed recess in a plan view can be increased while securing the absorption performance during use. In addition, the polygonal shape includes not only a shape in which the vertex of the polygon forms a corner, but also a shape in which the vertex of the polygon is rounded in a curved shape.

In the fifth aspect of the present invention, the asymmetry shape in the plan view is a heart shape. By making each embossed concave part into such a heart shape, kitchen paper excellent in design as paper used in the kitchen can be obtained while securing absorption performance during use.

DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings. However, the present invention is not limited to the following embodiments, and the following embodiments are not departed from the scope of the present invention. Various modifications and substitutions can be made.

FIG. 1 is a view showing kitchen paper according to an embodiment (Example 1) of the present invention. FIG. 2 is an enlarged view of a part (P1 portion) of FIG. 3A is a cross-sectional view taken along line AA in FIG. 2, and FIG. 3B is a cross-sectional view taken along line BB in FIG.

1 to 3, reference numeral 1 denotes a kitchen paper according to the present embodiment. The kitchen paper 1 is a kitchen paper in which two embossed crepe papers 3 and 5 are laminated in a nested format.

On the crepe paper 3, a plurality of embossed convex portions 7A and a plurality of embossed concave portions 7B corresponding to the embossed convex portions 7A are formed on the front and back sides. Each embossed recess 7B has an equilateral triangular shape that is asymmetrical in a plan view. Further, the side surface of the embossed recess 7B is formed with a taper (not shown) from the bottom of the embossed recess 7B toward the opening.

The embossed concave portion 7B is formed as an embossed concave portion corresponding to the embossed convex portion 7A by pressing a convex embossing roll (not shown) against the crepe paper 3 to form a plurality of embossed convex portions 7A.

On the other hand, on the crepe paper 5, a plurality of embossed convex portions 9A and a plurality of embossed concave portions 9B corresponding to the embossed convex portions 9A are formed on the front and back sides. Each embossed recess 9 </ b> B has an equilateral triangular shape that is asymmetrical in a plan view. The side surface of the embossed recess 9B is formed with a taper (not shown) from the bottom of the embossed recess 9B toward the opening.

The embossed concave portion 9B is formed as an embossed concave portion corresponding to the embossed convex portion 9A by pressing a convex embossing roll (not shown) against the crepe paper 5 to form a plurality of embossed convex portions 9A.

2 is a view seen in the direction of AD1 in FIG. 3, and the embossed convex portion 9A (corresponding embossed concave portion 9B) formed on the crepe paper 5 side of the kitchen paper 1 is below the crepe paper 3. Therefore, in FIG. 1 and FIG. 2, it is indicated by a broken line.

The basis weight of the crepe papers 3 and 5 is 15 to 30 g / m ² . Basis weight is based on JIS P 8124 (1998). When the basis weight of the crepe papers 3 and 5 is adjusted within this range, sufficient liquid diffusibility is obtained when a liquid such as water or oil touches the paper surface, and particularly high water absorption performance is obtained. Moreover, when the basis weight is within this range, flexibility and followability when used as kitchen paper can be obtained.

In the crepe papers 3 and 5, the raw material of the base paper is pulp. As the pulp composition, a known composition in kitchen paper can be used. For example, the blending ratio of the pulp can be 50% by mass or more, preferably 90% by mass or more, and more preferably 100% by mass.

The pulp composition is, for example, an appropriate ratio of softwood pulp such as NBKP (conifer kraft pulp) or NUKP (unleaved softwood pulp) and broadleaf pulp such as LBKP (hardwood kraft pulp) or LUKP (hardwood unbleached pulp). Can be used. In particular, it is preferable that the pulp composition has a larger composition than that of the hardwood pulp. The ratio of softwood pulp to hardwood pulp is preferably 50:50 to 80:20.

As shown in FIGS. 2 and 3A, the embossed convex portion 7A of the crepe paper 3 is disposed to face the non-embossed portion 11 of the crepe paper 5 (the portion where the embossed convex portion 9A is not provided). Yes. On the other hand, the embossed convex portion 9A of the crepe paper 5 is disposed to face the non-embossed portion 13 of the crepe paper 3 (the portion where the embossed convex portion 7A is not provided).

Furthermore, the top of the embossed convex portion 7 A of the crepe paper 3 is bonded to the non-embossed portion 11 of the crepe paper 5 with an adhesive 15. As a result, a nested stacked structure is formed between the crepe papers 3 and 5.

As in this example, the top portion of the embossed protrusion 7A of the crepe paper 3 and the non-embossed portion 11 of the crepe paper 5 are bonded to each other so that the bonded portion of the two crepe papers is one crepe paper (crepe paper). 3) It can be arranged in a balanced manner on the side. Therefore, a decrease in absorption performance due to the adhesive can be reduced.

In addition, the well-known adhesive agent employ | adopted as the adhesive agent 15 with the kitchen paper which has a laminated structure can be used. Examples of such an adhesive include cellulosic adhesives such as polyvinyl alcohol, starch, modified starch, and carboxymethyl cellulose.

Moreover, the kitchen paper according to the present embodiment can be manufactured by pasting together crepe paper on which embossing is formed by a known steel rubber embossing method.

Instead of adhering the top of the embossed convex portion 7A of the crepe paper 3 and the non-embossed portion 11 of the crepe paper 5, the top of the embossed convex portion 9A of the crepe paper 5 and the non-embossed portion 13 of the crepe paper 3 are adhered. May be. Further, the top of the embossed convex portion 7A of the crepe paper 3 and the non-embossed portion 11 of the crepe paper 5 are bonded, and the top of the embossed convex portion 9A of the crepe paper 5 and the non-embossed portion 13 of the crepe paper 3 are bonded. May be.

In this example, as shown in FIG. 2, the embossed recess 9B is arranged between the embossed recesses 7B and 7B in a form rotated by 180 ° in a plan view with respect to the embossed recess 7B. The embossed recess 7B and the embossed recess 9B are arranged such that the center of gravity G1 of the embossed recess 7B and the center of gravity G2 of the embossed recess 9B are aligned on a virtual straight line L1. The centroids G1 and G2 are also centroids having an asymmetrical shape in the plan view (in this example, an equilateral triangle).

At this time, the adjacent embossed recesses 7B and the embossed recesses 9B are arranged so that one side of the equilateral triangle is substantially parallel. Moreover, it arrange | positions so that the direction from which an equilateral triangle may become convex may face 180 degrees mutually.

By disposing the embossed recess 7B and the embossed recess 9B in this manner, a portion having high strength (the embossed projecting portion 9A in FIG. 3A), oil, and the like are absorbed between the embossed recessed portion 7B and the embossed recessed portion 9B. The portion to be formed (the space formed between the embossed convex portion 7A and the embossed convex portion 9A in FIG. 3A) can be arranged in a balanced manner with the same ratio. Therefore, the space between the crepe papers 3 and 5 is not easily crushed, and a space for absorbing oil or the like can be secured when using kitchen paper.

Therefore, in the kitchen paper of this example, the embossed space is not easily crushed by the load at the time of use, and the absorption performance decreases due to the load (for example, if the embossed space is crushed before absorbing the oil, the oil etc. cannot be absorbed) In the case where the embossed space in which the oil and the like are retained after being absorbed is crushed and the oil is oozed out, the embossed space is crushed and the absorption rate of the oil and the like is reduced).

In addition, the kitchen paper 1 employs a nested stacked structure as described above. Therefore, a contact area with a use object can be made small and the space in kitchen paper can be made hard to be crushed. Moreover, since an absorption speed can be maintained without providing a line etc., emboss space can be increased and the space which absorbs the oil component etc. in kitchen paper can be enlarged. Furthermore, since the basis weight and the paper thickness can be reduced, the thickness of the kitchen paper can be reduced.

The kitchen paper 1 is an example of the kitchen paper of the present invention, the crepe papers 3 and 5 are examples of the first sheet and the second sheet of the present invention, and the embossed convex part 7A and the embossed concave part 7B are These are examples of the first embossed convex portion and the first embossed concave portion in the present invention, and the embossed convex portion 9A and the embossed concave portion 9B are examples of the second embossed convex portion and the second embossed convex portion in the present invention. is there.

2 and 3B, the crepe paper 3 has a plurality of embossed convex portions 17A and a plurality of embossed concave portions 17B corresponding to the embossed convex portions 17A on the front and back sides. ing. Each embossed concave portion 17B also has an equilateral triangular shape that is asymmetrical in a plan view. Further, the side surface of the embossed recess 7B is formed with a taper (not shown) from the bottom of the embossed recess 7B toward the opening.

The embossed concave portion 17B is formed as an embossed concave portion corresponding to the embossed convex portion 17A by pressing a convex embossing roll (not shown) against the crepe paper 3 to form a plurality of embossed convex portions 17A.

On the other hand, on the crepe paper 5, a plurality of embossed convex portions 19A and a plurality of embossed concave portions 19B corresponding to the embossed convex portions 19A are formed on the front and back sides. Each embossed recess 19 </ b> B has an equilateral triangular shape that is asymmetrical in a plan view. The side surface of the embossed recess 19B is formed with a taper (not shown) from the bottom of the embossed recess 19B toward the opening.

The embossed recess 19B is also formed as an embossed recess corresponding to the embossed protrusion 19A by pressing a convex embossing roll (not shown) against the crepe paper 5 to form a plurality of embossed protrusions 19A.

Similarly to the embossed convex portion 9A (corresponding embossed concave portion 9B), the embossed convex portion 19A formed on the crepe paper 5 is located under the crepe paper 3, and is shown by a broken line in FIGS. Yes.

In this embodiment, the embossed convex portion 7A (embossed concave portion 7B), the embossed convex portion 17A (embossed concave portion 17B), the embossed convex portion 9A (embossed concave portion 9B), and the embossed convex portion 19A (embossed concave portion 19B) have the same shape. It can be.

2 and 3B, the embossed convex portion 17A of the crepe paper 3 is disposed to face the non-embossed portion 21 of the crepe paper 5 (the portion where the embossed convex portion 19A is not formed). Further, the embossed convex portion 19A of the crepe paper 5 is disposed so as to face the non-embossed portion 23 of the crepe paper 3 (a portion where the embossed convex portion 17A is not formed).

Furthermore, the embossed convex part 17A of the crepe paper 3 and the non-embossed part 21 of the crepe paper 5 are bonded by an adhesive 25. As a result, a nested stacked structure is formed between the crepe papers 3 and 5.

By adhering the top of the embossed convex portion 17A of the crepe paper 3 and the non-embossed portion 21 of the crepe paper 5, the bonded portion of the two crepe papers is arranged in a balanced manner on one crepe paper (crepe paper 3) side. Can do. Therefore, a decrease in absorption performance due to the adhesive can be reduced.

Instead of adhering the top of the embossed convex portion 17A of the crepe paper 3 and the non-embossed portion 21 of the crepe paper 5, the top of the embossed convex portion 19A of the crepe paper 5 and the non-embossed portion 23 of the crepe paper 3 are adhered. May be. Further, the top of the embossed convex portion 17A of the crepe paper 3 and the non-embossed portion 21 of the crepe paper 5 are bonded, and the top of the embossed convex portion 19A of the crepe paper 5 and the non-embossed portion 23 of the crepe paper 3 are bonded. May be.

For the adhesive 25, the same known adhesive as the adhesive 15 that adheres the top of the embossed convex portion 9A and the non-embossed portion 13 can be used.

In this example, as shown in FIG. 2, the embossed recess 19B is disposed between the embossed recesses 17B and 17B in a form rotated by 180 ° in a plan view with respect to the embossed recess 17B. The embossed recess 17B and the embossed recess 19B are arranged such that the center of gravity G3 of the embossed recess 17B and the center of gravity G4 of the embossed recess 19B are aligned on a virtual straight line L2 extending in parallel with the straight line L1. Note that the centroids G3 and G4 are also centroids of an asymmetrical shape (in this example, a regular triangle) in plan view.

In this case, the adjacent embossed recesses 17B and the embossed recesses 19B are arranged so that one side of the equilateral triangle is substantially parallel, and the directions in which the equilateral triangles are convex are opposite to each other by 180 °. Yes.

By disposing the embossed concave portion 17B and the embossed concave portion 19B in this way, a portion having high strength (the portion of the embossed convex portion 19A in FIG. 3B), oil, and the like are also present between the embossed concave portion 17B and the embossed concave portion 19B. The portion to be absorbed (the space formed between the embossed convex portion 19A and the embossed convex portion 17A in FIG. 3B) can be arranged in a balanced manner at the same ratio. For this reason, the embossed space is not easily crushed, so that it is possible to prevent the absorption performance from being lowered due to the load even between the embossed recess 17B and the embossed recess 19B.

Further, in this example, as shown in FIGS. 2 and 3, the embossed recess 17B on the straight line L2 is disposed opposite to the embossed recess 9B on the straight line L1 in a form rotated by 180 ° in plan view. . On the other hand, the embossed recess 19B on the straight line L2 is arranged in a form rotated by 180 ° in plan view with respect to the embossed recess 7B on the straight line L1. Note that the plurality of virtual straight lines L1 and the plurality of virtual straight lines L2 are alternately arranged in the Y direction in the figure.

Specifically, in FIG. 2, the embossed recess 7 </ b> B on the straight line L <b> 1 and the embossed recess 19 </ b> B on the adjacent straight line L <b> 2 are arranged so that the vertices of the equilateral triangle face each other. On the other hand, the embossed recess 9B on the straight line L1 and the embossed recess 17B on the adjacent straight line L2 are arranged so that one side of the equilateral triangle is parallel to one side.

At this time, the distance between the apex of the embossed recess 7B on the straight line L1 and the apex of the embossed recess 19B on the straight line L2 is greater than the distance between one side of the embossed recess 9B on the straight line L1 and one side of the embossed recess 17B on the straight line L2. Shorter. As a result, between the straight line L1 and the straight line L2, the distance between the vertices of the triangle having a relatively strong strength (the portion where the width of the triangle is relatively narrow) is relatively short, and the side of the triangle having a relatively weak strength The distance between the (the triangle having a relatively wide width) is relatively long.

By focusing on the straight line L1 and the straight line L2 by arranging the embossed concave part 17B and the embossed concave part 19B in this way, the embossed concave part 7B and the embossed concave part 9B on the straight line L1, the embossed concave part 17B and the embossed concave part 19B on the straight line L2 Between these, portions having a difference in strength can be arranged in a balanced manner. Therefore, since the embossing space is not easily crushed in the entire kitchen paper, it is possible to reliably prevent a decrease in absorption performance due to a load.

Further, in a structure in which such a portion having a difference in strength is arranged, a portion having high strength can be formed between the embossed recess 7B and the embossed recess 19B. On the other hand, the embossed space can be widened between the embossed recess 9B and the embossed recess 17B.

Therefore, between the straight line L1 and the straight line L2, a portion with high strength (a portion where the embossed concave portion 7B and the embossed concave portion 19B face each other) and a portion with a high retention amount of oil or the like (the embossed concave portion 9B and the embossed concave portion 17B face each other). Can be arranged in a balanced manner at the same ratio. As a result, the embossed space is not easily crushed even when a load is applied, and the amount of oil or the like retained can be maintained high.

Further, in the present embodiment, the center of gravity G1 of the embossed recess 7B on the straight line L1 and the center of gravity G4 of the embossed recess 19B on the straight line L2 are on the straight line L3 (see FIG. 2) in the direction perpendicular to the straight line L1 and the straight line L2. They may be arranged side by side. Similarly, in this embodiment, the center of gravity G2 of the embossed recess 9B on the straight line L1 and the center of gravity G3 of the embossed recess 17B on the straight line L2 may be arranged on a straight line parallel to the straight line L3. .

The embossed convex portion 17A and the embossed concave portion 17B are examples of other first embossed convex portions and other first embossed concave portions in the present invention, and the embossed convex portion 19A and the embossed concave portion 19B are the other in the present invention. It is an example of the 2nd embossing convex part of this, and another 2nd embossing recessed part.

In this example, the embossed recesses 7B and 17B and the embossed recesses 9B and 19B each have a regular triangular shape. However, the embossed recess has a non-planar shape in plan view. There is no particular limitation as long as the shape is point-symmetric. For example, various shapes can be adopted as the shape that is asymmetric in a plan view as shown in FIG. However, in any of the astigmatic shapes, a shape having a wide portion and a narrow portion, such as a regular triangle shape, has an effect that is closer to a triangular shape.

As the shape in which the shape in plan view is asymmetric with respect to a point, for example, a triangular shape that is not an equilateral triangle shape (FIG. 4A) may be employed. Triangular structures are generally known to have high strength, and the embossed convex portions corresponding to the embossed concave portions can be increased in strength by adopting triangular embossed concave portions in plan view. Therefore, even if a load is applied during use, the embossed space is not easily crushed, and kitchen paper is obtained in which the absorption performance is unlikely to deteriorate. Of the triangular shape in plan view, the shape of the embossed concave portion that can increase the strength of the embossed convex portion is preferably the equilateral triangle employed in this example.

In addition, as an asymmetrical shape in plan view, for example, a trapezoidal shape (truncated triangular shape) (FIG. 4B), a saddle shape (a pair of two adjacent sides having the same length) A polygonal shape such as a certain figure) (FIG. 4C), a convex shape (FIG. 4D), a pentagon (FIG. 4E), or a heptagon (FIG. 4F) may be employed. (See FIGS. 4B to 4F). Even if such an embossed concave portion having a polygonal shape in plan view is employed, the strength of the corresponding embossed convex portion can be increased because the shape of the embossed concave portion is asymmetrical in a plan view. For this reason, even when a load is applied during use, variations in the shape of the embossed recess in plan view can be increased while ensuring the absorption performance of the kitchen paper.

Note that FIG. 5 shows an emboss pattern of kitchen paper when the trapezoidal shape of FIG. 4B is adopted among the polygonal shapes. In FIG. 5, a reference numeral corresponding to that in FIG.

FIG. 6 shows an emboss pattern of kitchen paper when the saddle shape of FIG. 4C is adopted among the polygonal shapes. In FIG. 6, a reference numeral corresponding to that in FIG.

Furthermore, FIG. 7 shows an emboss pattern of kitchen paper when the convex shape of FIG. In FIG. 7, a reference numeral corresponding to that in FIG.

Further, as a shape that is asymmetrical in a plan view, for example, a heart-shaped shape (FIGS. 4G and 4H), a fan-shaped shape (FIG. 4I), etc. May be employed (see FIGS. 4G to 4K). Since the heart-shaped shape is similar to the above-mentioned triangular shape, the shape of the embossed concave portion in plan view is such a shape, and while ensuring the same level of absorption performance as the triangular shape, the kitchen has excellent design. Paper can be provided. The embossed recesses 7B and 17B and the embossed recesses 9B and 19B have a plan view shape that is astigmatic as shown in FIGS. 4B to 4K, and has a symmetry axis. A line-symmetric shape may be used. In this case, the embossed recesses 7B and 17B and the embossed recesses 9B and 19B can be arranged so that the symmetry axis is parallel to a straight line in a direction perpendicular to the straight line L1 and the straight line L2 (see L3 in FIG. 2).

FIG. 8 shows an emboss pattern of kitchen paper when the heart shape of FIG. 4 (G) is adopted. In FIG. 8, a reference numeral corresponding to that in FIG.

In addition, the main product aspect of the kitchen paper 1 which concerns on this invention is the roll-shaped thing wound around the paper tube with the strip | belt shape and the perforation line for division | segmentation arranged at appropriate intervals, or a pick-up type, a pop-up type, etc. Although what was called and the sheet paper kitchen paper folded and laminated | stacked can be illustrated, these product aspects are not limited.

Hereinafter, embodiments of the present invention will be described with reference to examples. Specifically, the kitchen paper according to the embodiment of the present invention (Example 1, Example 2, Example 3) and a commercial kitchen paper and a prototype of the kitchen paper having the same embossed structure (Comparative Example 1, Reference Example) Was used to confirm the effect of the present invention.

[Example 1]
In Example 1, a kitchen paper having a nested type laminated structure shown in FIGS. 1 to 3 was used.

In Example 1, first, the convex emboss corresponding to the emboss pattern (embossed convex portions 7A, 17A and embossed convex portions 9A, 19A) of the crepe paper 3, 5 shown in FIGS. Two acrylic plates on which a pattern is formed are prepared.

The embossed patterns of these acrylic plates are embossed on the crepe papers 3 and 5, respectively, and the crepe paper 3 on which the embossed concave parts 7B and 17B corresponding to the embossed convex parts 7A and 17A are formed, and the embossed convex parts 9A and 19A. The crepe paper 5 on which the embossed recesses 9B and 19B were formed was produced.

In addition, the crepe papers 3 and 5 were made of 100% by mass of pulp fiber material. The crepe papers 3 and 5 were those having a basis weight of 21.2 g / m ² and a paper thickness of 121 μm.

As shown in FIGS. 1 to 3, these crepe papers 3 and 5 have the top portions of the embossed convex portions 7A and 17A and the non-embossed portions 11 and 21 facing each other, and the top portions of the embossed convex portions 9A and 19A and the non-embossed portion 13. , 23 were stacked while being aligned so that they face each other. Further, the embossed convex portion 9A and the non-embossed portion 13 were bonded by the above-described adhesives 15 and 25. The obtained one has a nested type laminated structure, and this was used as the kitchen paper of Example 1.

In Example 1, the embossed recess 7B and the embossed recess 9B are arranged in the X direction (the axial center direction of the convex embossing roll) so that the distance between the center of gravity G1 and the center of gravity G2 is 2.4 mm. Yes. Further, the embossed recess 17B and the embossed recess 19B are arranged so that the distance between the center of gravity G3 and the center of gravity G4 is 2.4 mm. Furthermore, the straight line L1 in which the center of gravity G1 and the center of gravity G2 are arranged, and the straight line L2 in which the center of gravity G3 and the center of gravity G4 are arranged are arranged in the Y direction (the rotation direction of the convex embossing roll), and the distance between the straight line L1 and the straight line L2 is 2.7 mm. It has become.

In Example 1, there are no lines as in Comparative Example 1 and Reference Example described later.

Other conditions regarding Example 1 are shown in Table 1.

[Example 2]
In the second embodiment, two acrylic plates are prepared on which convex emboss patterns corresponding to the embossed patterns (embossed concave portions 107B and 117B and embossed convex portions 109A and 119A) having a trapezoidal unit embossing as shown in FIG.

The convex embossed pattern of these acrylic plates was embossed on the crepe paper 103 to produce a crepe paper 103 in which embossed concave portions 107B and 117B were formed. Note that the crepe paper (crepe paper on which the embossed protrusions 109 </ b> A and 119 </ b> A are formed) laminated on the back surface of the crepe paper 103 is produced in the same manner as the crepe paper 103.

Then, the crepe paper 103 and the crepe paper on the back surface were laminated in the same manner as in Example 1, and the kitchen paper having a laminated structure of the obtained nested type was designated as Example 2.

Other conditions regarding Example 2 are the same as Example 1 (see Table 1).

[Example 3]
In Example 3, two acrylic plates are prepared on which convex embossing patterns corresponding to embossed patterns (embossed concave portions 207B and 217B and embossed convex portions 209A and 219A) are formed as unit embossments shown in FIG. .

The convex embossed pattern of these acrylic plates was embossed on the crepe paper 203 to produce a crepe paper 203 on which embossed concave portions 207B and 217B were formed. Note that the crepe paper (crepe paper on which the embossed protrusions 209A and 219A are formed) to be laminated on the back surface of the crepe paper 203 is produced in the same manner as the crepe paper 203.

Then, the crepe paper 203 and the crepe paper on the back surface were laminated in the same manner as in Example 1, and the obtained kitchen paper having a laminated structure of the nested type was designated as Example 3.

Other conditions regarding Example 3 are the same as Example 1 (see Table 1).

[Comparative Example 1]
In Comparative Example 1, a kitchen paper having a tip-to-tip type laminated structure shown in FIGS. 11 to 13 was used. 11 to 13, the reference numerals corresponding to those in FIGS. 1 to 3 are added with the reference numeral 500, and a part of the description is omitted.

In Comparative Example 1, first, convex emboss patterns corresponding to emboss patterns (embossed convex portions 507A, 517A, embossed convex portions 509A, 519A) of the crepe paper 503, 505 shown in FIGS. 11 to 13 are formed. Prepare two acrylic plates.

By embossing the convex emboss patterns of these acrylic plates on the crepe papers 503 and 505, respectively, the crepe paper 503 has the embossed convex portions 507A and 517A and the embossed concave portions 507B and 517B corresponding to the embossed convex portions 507A and 517A. Are formed on the front and back. The crepe paper 505 has a plurality of embossed convex portions 509A and 519A and a plurality of embossed concave portions 509B and 519B corresponding to the embossed convex portions 509A and 519A.

In addition, the crepe paper 503 and 505 used the base paper of the same conditions as the crepe paper 3 and 5 of Example 1. FIG.

As shown in FIGS. 11 to 13, these embossed crepe papers 503 and 505 have the top portions of the embossed convex portions 507A and 517A opposed to the top portions of the embossed convex portions 509A and 519A, and the non-embossed portions 513 and 523. And the non-embossed portions 511 and 521 of the crepe paper 505 were laminated while being aligned. Further, the top portions of the embossed convex portions 507A and 517A and the top portions of the embossed convex portions 509A and 519A were bonded by the same adhesives 515 and 525 as the adhesive used in Example 1.

Embossed concave portions 507B and 519B corresponding to the embossed convex portions 507A and 517A are formed on the surface (crepe paper 503 side) of the obtained kitchen paper 501. On the other hand, embossed concave portions 509B and 519B corresponding to the embossed convex portions 509A and 519A are formed on the back surface (crepe paper 505 side) of the kitchen paper 501. The obtained one has a tip-to-tip type laminated structure, and this was used as the kitchen paper of Comparative Example 1.

In the kitchen paper of Comparative Example 1, the shape of each embossed protrusion in plan view is a point-symmetric shape (substantially square). In Comparative Example 1, a line LN1 is provided between the emboss blocks BL1 as shown in FIG.

As shown in FIG. 12, in Comparative Example 1, the embossed recess 507B is arranged so that the distance between the center of gravity G501 and the center of gravity G502 is 3.8 mm. The embossed recess 517B is also arranged so that the distance between the centers of gravity is 3.8 mm. Furthermore, the distance between the straight line L501 in which the center of gravity G501 and the center of gravity G502 are arranged and another straight line L501 sandwiching the straight line L502 is 3.7 mm.

Other conditions concerning Comparative Example 1 are shown in Table 1.

[Reference example]
As a reference example, kitchen paper having a nested laminated structure shown in FIGS. 14 to 16 was used. 14 to 16, the reference numerals corresponding to those in FIGS. 1 to 3 are added with 600, and the description thereof is omitted.

In the reference example, first, a convex emboss pattern corresponding to the embossed pattern (embossed convex portions 607A and 617A, embossed convex portions 609A and 619A) of the crepe paper 603 and 605 shown in FIGS. 14 to 16 is formed. Prepare two acrylic plates.

By embossing the embossed patterns of these acrylic plates on the crepe paper, respectively, the crepe paper 603 on which the embossed concave portions 607B and 617B corresponding to the embossed convex portions 607A and 617A are formed, and the embossed convex portions 609A and 619A. A crepe paper 605 having embossed recesses 609B and 619B was produced.

In addition, the crepe paper 603 and 605 used the base paper of the same conditions as Example 1. FIG.

As shown in FIGS. 14 to 16, these crepe papers 603 and 605 are arranged such that the top portions of the embossed convex portions 607A and 617A and the non-embossed portions 611 and 621 face each other, and the top portions of the embossed convex portions 609A and 619A and the non-embossed portions. Lamination was performed while adjusting the position so that 613 and 623 face each other. Further, the tops of the embossed convex portions 607A and 617A and the non-embossed portions 611 and 621 were bonded with the same adhesive as that used in Example 1. The obtained one has a nested type laminated structure, which was used as a kitchen paper of a reference example.

In the reference example, the shape of each embossed recess in plan view is an asymmetrical shape (substantially equilateral triangle), but the centers of gravity G601 and G602 of the embossed recesses 607B and 609B are on a straight line when viewed in the X direction. Not lined up. That is, the embossed recess 609B is arranged between the embossed recesses 607B and 607B so that the center of gravity G602 is shifted from the straight line L601 to the straight line L602 side.

Also, the centers of gravity G603 and G604 of the embossed recesses 617B and 619B are not aligned on a straight line. That is, the embossed recess 617B is arranged between the embossed recesses 619B and 619B so that the center of gravity G603 is shifted from the straight line L602 to the straight line L601 side.

In the reference example, the embossed recesses 607B and 607B are arranged so that the distance between the center of gravity G601 and the center of gravity G601 is 4.8 mm. Further, the embossed recesses 619B and 619B are arranged so that the distance between the center of gravity G604 and the center of gravity G604 is 4.8 mm. Further, the distance between the straight line L601 in which the center of gravity G601 and the center of gravity G602 are arranged, and the straight line L602 in which the center of gravity G603 and the center of gravity G604 are arranged is 2.7 mm. The distance between the straight line L602 and another straight line L601 is 2.0 mm.

Other conditions regarding the reference example are shown in Table 1.

These Example 1, Example 2, Example 3, Comparative Example 1, and the reference example were measured for attenuation during loading and oil absorption during loading. Each measuring method is as follows.

[Base paper]
<Basis weight>
The basis weight (g / m ² ) of the base paper used in the test is calculated according to JIS P 8124 (1998).

<Paper thickness>
Measure the paper thickness (μm / sheet) of the base paper. The thickness of the base paper is measured by fully adjusting the base paper under the conditions of JIS P 8111 (1998) and then dial thickness gauge (thickness measuring instrument) “PEACOCK G type” (manufactured by Ozaki Seisakusho) under the same conditions. Use to measure.

The specific procedure for measurement is to confirm that there is no dust, dust, etc. between the plunger and the measurement table. Then, lower the plunger on the measurement table and move the dial thickness gauge memory to set the zero point. Match. The plunger is then raised and the sample is placed on the test bench, the plunger is slowly lowered, and the gauge at that time is read. At this time, only the plunger is placed. The terminal of the plunger is made of metal so that a circular plane having a diameter of 10 mm is perpendicular to the paper plane. The load at the time of measuring the thickness is about 70 gf at 120 μm. In addition, let the measured value of thickness be the average value obtained by measuring 10 times.

[Damping test under load]
First, as a test piece 752 of Examples 1 to 3, Comparative Example 1, and Reference Example, a test piece 752 obtained by cutting two crepe papers into a set of 12 cm × 12 cm is prepared. As shown in FIG. 9, the test piece 752 has 10 sets of cut test pieces 752 stacked thereon, and a plastic plate 750 (about 12 cm × 12 cm, thickness 0.8 mm, weight 14.1 g) is placed thereon, As shown on the left side of FIG. 9, the height of the test piece 752 is measured using a JIS Class 1 metal scale. The measurement location (indicated as “756a” in the figure) is the upper end of the plastic plate 750, and the measurement value is the height of the test piece 752. The height of the test piece 752 at this time is taken as the initial thickness.

After measuring the initial thickness, a further 186 g of weight (754) (about 12 cm × 12 cm, thickness 12 mm) was placed on the plastic plate 750 placed on the test piece 752, and as shown on the right side of FIG. The height of the test piece 752 is measured using a metal scale. The measurement location (indicated as “756b” in the figure) is the upper end of the plastic plate 750 and the measurement value is the height of the test piece 752, similarly to the initial thickness. The height of the test piece 752 at this time is defined as the thickness at the time of load.

Calculate the decay rate (crush rate) at the time of loading from the measured initial thickness and the thickness at the time of loading. The attenuation rate under load is calculated from the following formula.

・ Damping rate under load (%) = (initial thickness−thickness under load) ÷ initial thickness × 100
The attenuation rate under load was calculated from the initial thickness obtained by one measurement and the thickness under load. Table 1 shows the initial thickness (mm), the thickness (mm) when loaded, and the attenuation rate (%) when loaded in Examples 1 to 3, Comparative Example 1, and Reference Example.

[Measurement of oil absorbency]
The test method of oil absorbency cuts the test piece 702 into 12 cm × 12 cm, similarly to the attenuation test under load. Using an electronic balance (HR300 manufactured by A & D Co., Ltd.), a plastic sheet 700 shown in FIG. 10 (about 12 cm × 12 cm, thickness 0.2 mm, weight 2.7 g, material polypropylene), test Each piece 702, weight 704 (diameter of about 82 mm, thickness of 10 mm, weight of 59 g, material acrylic), and lower paper 708 (5 sheets of copy paper cut into about 12 cm × 12 cm) are measured. After the measurement, a test piece 702 is placed on the plastic sheet 700, and a weight 704 is placed in the center of the test piece 702. The weight 704 is provided with a hole penetrating in the thickness direction. The diameter of the hole is about 12 mm.

After that, weigh 2.3 ml (about 2.0 g) of oil 706 (room temperature salad oil) (Nisshin Oillio Group Nisshin Salad Oil) with a pipette (Thermoscientific, Finnpette F2, 0.5-5 ml). It is dripped from the hole of 704. At this time, the dropping position (embossed portion) is fixed at the center position of the test piece 702 as shown in FIG.

2 minutes after dropping, the weight 704 is removed and the weight (return amount of (3) in the figure) is measured. Thereafter, the plastic sheet 700 is removed, and the weight (the amount of see-through in (2) in the figure) is measured. Then, after measuring the weight of the test piece 702 (absorption amount of (1) in the figure) and placing it on the lower paper 708, 5 minutes later, the weight of the test piece 702 (final retained oil amount in the figure ( 4), and the amount of oil in the lower paper 708 (the amount of oil that could not be retained, the amount of final back-through in (5) in the figure).

In Examples 1 to 3, Comparative Example 1, and Reference Example, as shown in FIG. 10, the test piece oil absorption amount (g), the back-through amount (g), the return amount (g), the dripping oil amount (g), Test piece final holding amount (g), final strike-through amount (g), total strike-through amount (g), test piece oil absorption amount (%), drop-through amount (%), return amount (%), amount of dripping oil, test The final hold amount (%), the final strikethrough amount (%), and the total strikethrough amount (final strikethrough amount) (%) were measured and shown in Table 1.

Each item such as test piece oil absorption (g) was calculated according to the formulas listed below.

-Test piece oil absorption (g) = Test piece weight 2 minutes after dropping-Test piece weight-Back-through amount (g) = Plastic sheet weight 2 minutes after dropping-Plastic sheet weight-Return amount (g ) = Weight of weight 2 minutes after dropping-Weight of dripping-Dropped oil amount (g) = Test piece oil absorption + Back-through amount + Return amount-Test piece final holding amount (g) = Test piece weight after 5 minutes-Test Piece weight-Final amount of through-through (g) = Weight of base paper after 5 minutes-Weight of under-paper-Total amount of through-through (g) = amount of through-through + final amount of through-through-Test piece oil absorption (%) = Test Single oil absorption ÷ dripping oil amount × 100
・ Back-through amount (%) = Back-through amount / Drip oil amount × 100
・ Return amount (%) = Return amount ÷ Drip oil amount × 100
・ Final specimen holding amount (%) = Final holding quantity ÷ Drip amount of oil × 100
-Final strikethrough amount (%) = Final strikethrough amount / Drip oil amount x 100
・ Total amount of through-through (%) = Total amount of through-through / Drip amount of oil × 100
Test piece oil absorption (g), back-through amount (g), return amount (g), dripping oil amount (g), final test piece holding amount (g), final back-through amount (g), total back-through amount Each measured value of (g) is an average value obtained by performing the measurement three times. From these test piece oil absorption amounts (g), etc., the test piece oil absorption amount (%), the back-through amount (%), the return amount (%), the test piece final holding amount (%), the final back-through amount (%), The total amount of strikethrough (%) was calculated.

[Comparison of damping rate under load]
Comparing the results of the attenuation test under load from Table 1, in Examples 1 to 3, the initial thickness is thinner than in Comparative Example 1 and the reference example. On the other hand, in Examples 1 to 3, the attenuation rate (crushed rate) under load is smaller than that in Comparative Example 1 and the reference example. This result shows that Examples 1 to 3 are not easily crushed against the load. The reference example having the same nested stacked structure is less likely to be crushed with respect to the load than Comparative Example 1, but Examples 1 to 3 are less likely to be crushed with respect to the load than with the reference example.

[Comparison of oil absorption]
Comparing the results of oil absorption from Table 1, in Examples 1 to 3, both the oil absorption amount of the test piece with respect to the amount of oil dropped and the final retained amount are higher than those of Comparative Example 1 and the reference example. ing. Moreover, the return amount of the test piece with respect to the amount of dropped oil is lower than that of Comparative Example 1 and the reference example. These results indicate that the oil retention performance of Examples 1 to 3 is high. The reference example provided with the same nested type laminated structure shows higher oil retention performance than Comparative Example 1. However, Examples 1 to 3 show higher oil retention performance than the reference example.

In Examples 1 to 3, all of the amount of back-through, final back-through, and total amount of back-through with respect to the amount of dropped oil are lower than those in Comparative Example 1 and the reference example. This result indicates that in Examples 1 to 3, it is difficult for oil to penetrate through (not easily ooze out). Compared with Comparative Example 1, the reference example having the same nested stacked structure is less likely to be seen through. However, even with respect to the reference example having the same nested type laminated structure, Examples 1 to 3 show that it is difficult for oil to penetrate through.

[Comparison of laminated structures]
Here, when comparing the laminated structure of Example 1 with Comparative Example 1 and the reference example, first, since Comparative Example 1 having a tip-to-tip laminated structure, Example 1 has a nested laminated structure. It is difficult to be crushed (see FIGS. 3 and 13). This is supported by the results of the above-described attenuation test under load.

Further, when the cross section of the straight line L1 of the first example and the straight line L601 of the reference example is compared with the reference example having the same nested structure as that of the first example, the width d601 of the embossed convex portion 609A of the reference example is compared. In addition, the width d1 of the embossed convex portion 9A of Example 1 is larger (see FIGS. 2, 3, 15, and 16). For this reason, the structure of Example 1 is considered to be less likely to be crushed because the portion having high strength with respect to the load is arranged at the same ratio in the direction in which the centroids G1 and G2 are arranged. It is done.

On the other hand, when the cross section of the straight line L2 of Example 1 and the straight line L602 of the reference example is compared, the width d2 of the embossed convex part 17A of Example 1 is larger than the width d602 of the embossed convex part 617A of the reference example. Therefore, the structure of Example 1 is more difficult to be crushed than the structure of the reference example because the portions having high strength against the load are arranged at the same ratio in the direction in which the centers of gravity G3 and G4 are arranged. Conceivable.

In the reference example, when the cross sections of the straight line L601 and the straight line L602 are compared, the width d601 of the embossed convex portion 609A and the width d603 of the embossed convex portion 619A are different in dimensions (FIGS. 16A and 16B). reference). On the other hand, in Example 1, when the cross section of the straight line L1 and the straight line L2 is compared, the width d1 of the embossing convex part 9A and the width d3 of the embossing convex part 19A are substantially the same (FIG. 3A). ) And (B)).

Therefore, in Example 1, the embossed space having a low strength with respect to the load and the embossed convex portion 9A having a high strength with respect to the load are arranged in a balanced manner in the direction in which the gravity centers G1 and G2 are arranged. Further, the embossed space having a low strength with respect to the load and the embossed convex portion 19A having a high strength with respect to the load are arranged in a balanced manner in the direction in which the gravity centers G3 and G4 are arranged. For this reason, it is considered that the embossed space is not easily crushed in the entire kitchen paper.

Furthermore, when the cross section of the straight line L1 of Example 1 and the straight line L601 of the reference example is compared, in the reference example, the dimension of the width d601 of the embossed convex part 609A is larger than the width d604 between the embossed convex part 607A and the embossed convex part 609A. Is small (see FIG. 16A). On the other hand, in Example 1, the width d4 between the embossed convex part 7A and the embossed convex part 9A and the width d1 of the embossed convex part 9A have substantially the same dimensions (see FIG. 3A).

Therefore, in Example 1, the embossed space with low strength and the embossed convex portion 9A with strong strength formed between the embossed convex portion 7A and the embossed convex portion 9A are arranged at the same ratio in the direction in which the centers of gravity G1 and G2 are arranged. Therefore, it is thought that it is harder to collapse.

When comparing the cross section of the straight line L2 of Example 1 and the straight line L602 of the reference example, in the reference example, the dimension of the width d602 of the embossed convex part 617A is larger than the width d605 between the embossed convex part 619A and the embossed convex part 617A. Small (see FIG. 16B). On the other hand, in Example 1, the width d5 between the embossed convex part 19A and the embossed convex part 17A and the width d2 of the embossed convex part 17A have substantially the same dimensions (see FIG. 3B).

Therefore, in Example 1, the embossed space having a low strength and the embossed convex portion 17A having a high strength formed between the embossed convex portion 19A and the embossed convex portion 17A are arranged at the same ratio in the direction in which the centers of gravity G3 and G4 are arranged. Therefore, it is thought that it is harder to collapse.

In the first embodiment, the embossed recess 7B on the straight line L1 and the embossed recess 19B on the straight line L2 are arranged so that the vertices of the equilateral triangle face each other, and the embossed recess 9B on the straight line L1 and the straight line L2 The upper embossed recess 17B is arranged so that one side of the equilateral triangle is parallel to one side. The distance between the vertex of the embossed concave portion 7B on the straight line L1 and the vertex of the embossed concave portion 19B on the straight line L2 is shorter than the distance between one side of the embossed concave portion 9B on the straight line L1 and one side of the embossed concave portion 17B on the straight line L2.

As a result, in Example 1, the distance between the vertices of the relatively strong triangle (the portion where the width of the triangle is relatively narrow) is relatively short between the straight line L1 and the straight line L2, and the strength is compared. The distance between the sides of the relatively weak triangle (the portion where the width of the triangle is relatively wide) is relatively long.

Therefore, in Example 1, the part with a difference in strength can be arranged in a well-balanced manner between the straight line L1 and the straight line L2, and the embossed space is difficult to be crushed in the entire kitchen paper. Can be surely prevented.

Further, in such a portion having a difference in strength, a high-strength portion can be formed between the embossed concave portion 7B and the embossed concave portion 19B, while an embossed space is formed between the embossed concave portion 9B and the embossed concave portion 17B. Can be wide. Therefore, between the straight line L1 and the straight line L2, a portion with high strength (a portion where the embossed concave portion 7B and the embossed concave portion 19B face each other) and a portion with a high retention amount of oil or the like (the embossed concave portion 9B and the embossed concave portion 17B face each other). Can be arranged in a balanced manner at the same ratio. As a result, the embossed space is not easily crushed even when a load is applied, and the retained amount of oil or the like can be maintained high.

On the other hand, also in the reference example, the embossed recess 607B on the straight line L601 and the embossed recess 619B on the straight line L602 are arranged so that the vertices of the equilateral triangle face each other, and the embossed recess 609B on the straight line L601 The embossed recess 617B on the straight line L602 is arranged so that one side of the equilateral triangle is parallel to one side.

However, in the reference example, the distance between the apex of the embossed recess 607B on the straight line L601 and the apex of the embossed recess 619B on the straight line L602, and one side of the embossed recess 609B on the straight line L601 and one side of the embossed recess 617B on the straight line L602. The distance is substantially the same. That is, between the straight line L601 and the straight line L602, the distance between the vertices of the triangle with relatively high strength (the portion where the width of the triangle is relatively narrow) and the side of the triangle with relatively low strength (the width of the triangle is relative) The distance between the wide portions) is substantially the same.

Therefore, in the reference example, a portion having a difference in strength is less likely to be generated between the straight line L601 and the straight line L602 as compared with the configuration of the first embodiment. Therefore, the embossed space is easily crushed in the direction orthogonal to the straight line L601. Thus, the absorption performance due to the load is reduced as compared with the configuration of the first embodiment.

Further, in the reference example, as in the first embodiment, a portion having high strength cannot be formed between the embossed recess 607B and the embossed recess 619B, and the embossing between the embossed recess 609B and the embossed recess 617B is not possible. The space cannot be widened. That is, in the reference example, as in the first embodiment, a portion having high strength and a portion having a high amount of oil or the like cannot be arranged in a balanced manner between the straight line L601 and the straight line L602. For this reason, in the reference example, the embossed space is easily crushed at the time of loading as compared with the configuration of the first embodiment, and the retention amount of oil and the like cannot be maintained high.

In addition, the effect of Example 1 in the comparison of the laminated structures described above is substantially the same in Example 2 and Example 3 in which the shape of each embossed recess in plan view is asymmetrical as in Example 1. It can be assumed that it will be obtained.

From the above results, the kitchen paper of the present invention can reduce the paper thickness and maintain the advantages of the nested type that can increase the oil absorption speed, while maintaining the tip-to-tip type and the conventional nested type kitchen paper. It was found that the oil absorption performance during use was excellent.

The preferred embodiments of the present invention have been described in detail above. However, the present invention is not limited to the specific embodiments, and various modifications and changes can be made within the scope of the invention described in the claims. Is possible.

This international application claims priority based on Japanese Patent Application No. 2016-192179 filed on September 29, 2016, the entire contents of which are incorporated herein by reference.

1 Kitchen paper 3, 5 Crepe paper 7A, 9A, 17A, 19A Embossed convex part 7B, 9B, 17B, 19B Embossed concave part G1, G2, G3, G4 Center of gravity L1, L2 Straight line

Claims (5)

1. A plurality of first embossed convex portions and corresponding first embossed concave portions are formed on the front and back sides, and a plurality of second embossed concave portions corresponding to the second embossed convex portions are formed on the front and back sides. A kitchen paper in which the second sheet is integrated in a nested manner with the formation surface of the embossed protrusion facing each other,
   The first and second embossed recesses have the same shape that is both astigmatic in plan view,
   The second embossed recess is disposed between the first embossed recesses in a form rotated by 180 ° in a plan view with respect to the first embossed recess,
   The kitchen paper, wherein centers of gravity of the first embossed concave portion and the second embossed concave portion are arranged on a first straight line.
2. The center of gravity of each of the other first embossed recesses and the other second embossed recesses is aligned on a second straight line parallel to the first straight line,
   The other second embossed recess is disposed opposite to the first embossed recess on the first straight line and rotated by 180 ° in a plan view with respect to the first embossed recess. The kitchen paper according to claim 1.
3. The kitchen paper according to claim 1, wherein the shape that is asymmetrical in a plan view is a regular triangle.
4. The kitchen paper according to claim 1, wherein the shape that is asymmetric with respect to a plane is a polygonal shape.
5. The kitchen paper according to claim 1, wherein the shape that is asymmetric with respect to a plane is a heart shape.

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