TWI768000B - sanitary tissue paper - Google Patents

Abstract

The present invention provides a sanitary tissue paper having excellent absorbency under load while maintaining absorbency and design. The sanitary tissue paper is a sanitary tissue paper in which two or more sheets are stacked and integrated, and is composed of at least two sheets that are adjacent in the overlapping direction among the two or more sheets, and the two sheets are A pair of sheets in which a plurality of embossed convex portions and embossed concave portions corresponding to the embossed convex portions are formed on the front and the back, respectively, and the forming surfaces of the pair of sheets having the embossed convex portions face each other in a nested manner The first sheet material and the second sheet material, the first sheet material has an embossed portion formed with a plurality of embossed convex portions and a plurality of non-embossed convex portions, and a plurality of embossed convex portions and a plurality of non-embossed convex portions are not formed. The non-embossed portion of the embossed convex portion, wherein the second sheet has an embossed portion in which a plurality of embossed convex portions and a plurality of non-embossed convex portions are formed, and does not have a plurality of embossed convex portions and a plurality of non-embossed convex portions. The non-embossed portion of the non-embossed convex portion.

Description

sanitary tissue paper

The present invention relates to sanitary tissue paper.

Sanitary tissue paper such as kitchen paper has a laminated structure in which sheets such as crepe paper which have been embossed are laminated. In order to impart oil and moisture absorbing performance to conventional sanitary tissue paper, each sheet is embossed to form protrusions (hereinafter, referred to as embossed protrusions) on one surface and the other surface. The concave portion (hereinafter, referred to as an embossed concave portion) corresponding to the convex portion is formed by laminating these sheets to form a space (embossing space) between the laminated sheets, and the absorbed oil and the like are held in the embossing space.

In addition, in such sanitary tissue paper, in order to improve design properties and absorption performance (water, oil absorption, retention, etc.), embossed protrusions and embossed portions formed by embossing are formed on each sheet. The embossed concave portion corresponding to the convex portion and the portion without the embossed convex portion surrounded by a plurality of embossed convex portions (hereinafter, referred to as non-embossed convex portion), and further, these embossed convex portions and In the non-embossed space where the parts of the non-embossed convex portions (hereinafter, referred to as non-embossed parts) are opposed to each other, the oil content and the like can be passed through the non-embossed space, so that the absorption performance of the oil content and the like becomes high.

For example, in FIG. 2 of Japanese Patent Publication No. 6-28951 (Patent Document 1), there is disclosed a tip-to-top (Tip To Top) (Tip To Top) in which the tops of the convex portions of two embossed crepe papers face each other and are adhered to each other. Toilet paper such as kitchen paper towels with a laminated structure in the form of Tip). In addition, US Pat. No. 8,409,404 (Patent Document 2) discloses a crepe paper having the top of the convex portion of one crepe paper positioned on the other crepe paper, which is not a convex portion (viewed from the opposite crepe paper by a plurality of The kitchen paper of a nested form in which the convex parts are arranged in a manner different from each other in the portion surrounded by the embossed convex parts and the convex parts are not formed, and the laminated structure is adhered. Furthermore, Japanese Patent Laying-Open No. 2008-208501 (Patent Document 3) discloses kitchen paper provided with intersecting linear non-embossed spaces inside.

Known technical literature

Patent Literature

Patent Document 1: Japanese Patent Publication No. 6-28951

Patent Document 2: Specification of US Patent No. 8409404

Patent Document 3: Japanese Patent Laid-Open No. 2008-208501

However, with the structure of Patent Document 1 (a top-to-top laminated structure), there is a problem in that the strength to the lamination direction (thickness direction) is weak, and when sanitary tissue paper is used (for example, in a sheet spread on a plate) When fried food is placed on the kitchen paper, etc.), the oil etc. absorbed by the load oozes out (prints through) to the back side of the sanitary tissue paper (for example, a plate on which the kitchen paper is placed).

In addition, with the structure of Patent Document 2 (the lamination structure of the nested type), although the contact area with the object to be used can be reduced compared with the lamination structure of the top-to-top type, since the embossing space is small, even during use The crushing of the micro embossing space generated when a load is applied also makes it difficult to absorb oil and the like, and there is a problem that the absorbed oil oozes out.

Furthermore, in the sanitary tissue paper having the non-embossed space disclosed in Patent Document 3, since there are no pillars formed by the embossed protrusions in the non-embossed space, the strength against the load in the thickness direction is reduced. Therefore, in the conventional sanitary tissue paper having such a non-embossed space, irrespective of the top-to-top form and the lamination structure formed by nesting, when a load is applied in the thickness direction, the non-embossed space is compressed, and oil absorption performance is found. lowering problem.

In addition, by reducing such a non-embossed space, the strength in the thickness direction can be improved. However, due to the reduction in the space volume of the non-embossed space, the diffusibility of oil and the like is reduced, and the non-embossed in each sheet The area of the portion is reduced, and therefore, the designability is reduced. In addition, when there is an intersection where the non-embossed space intersects in the space sandwiched between the sheets, oil and the like stay in the intersection and the diffusion of the oil and the like is inhibited, thereby further reducing the absorption performance.

An object of the present invention is to provide a sanitary tissue paper excellent in absorbency under load while maintaining absorbency and design.

In order to solve the above-mentioned problems, a first aspect of the present invention is a sanitary tissue paper in which two or more sheets are stacked and integrated, wherein the two or more sheets are adjacent to each other in the overlapping direction. At least two sheets are formed of at least two sheets, and the two sheets are respectively formed with a pair of sheets of a plurality of embossed convex parts and embossed concave parts corresponding to the embossed convex parts on the front and back, the above-mentioned pair of sheets A first sheet material and a second sheet material in which the forming surfaces of the embossed convex portions are opposed to each other in a nested manner, and the first sheet material has an embossed portion formed with a plurality of embossed convex portions and a plurality of non-embossed convex portions and a non-embossed portion in which a plurality of embossed convex portions and a plurality of non-embossed convex portions are not formed, wherein the second sheet has an embossed portion formed with a plurality of embossed convex portions and a plurality of non-embossed convex portions, There is no non-embossed portion in which a plurality of embossed convex portions and a plurality of non-embossed convex portions are not formed.

In the sanitary tissue paper, two or more sheets are stacked and integrated. The sanitary tissue paper is not particularly limited, and includes kitchen paper, tissue paper, dry type or wet type sanitary tissue paper impregnated with water or chemical solution. Regarding the use of sanitary tissue paper, both household and business use sanitary tissue paper can be targeted. In addition, a conventional crepe paper used for sanitary tissue paper can be used for two or more sheets. The same material may be used for each sheet, or different materials may be used. In addition, two or more sheets are superimposed and integrated means that a plurality of sheets are superimposed in the up-down direction to constitute one sheet of sanitary tissue paper.

A pair of sheets is comprised by at least two sheets which adjoin in the overlapping direction among two or more sheets. The overlapping direction refers to the direction in which two or more sheets are stacked (the thickness direction of the sanitary tissue paper). In addition, the at least 2 sheets adjoining in the superposition direction refers to the two sheets which adjoin up and down and are superimposed among the superimposed two or more sheets. Furthermore, two sheets constituting a pair of sheets have a plurality of embossed convex portions and embossed concave portions corresponding to the embossed convex portions on the front and back surfaces of the respective sheets.

The embossed convex portion is a convex portion formed on the sheet by embossing. The embossed concave portion is a concave portion formed integrally with the front and back surfaces of the embossed convex portion on the sheet. The non-embossed convex portion means a portion surrounded by a plurality of embossed convex portions where no convex portion is formed.

A pair of sheet material has the 1st sheet material and the 2nd sheet material which the formation surface of an embossing convex part opposes in a nested form. Making the surfaces of the embossed protrusions face each other in a nested manner means to make the top of the embossed protrusions of the first sheet and the part of the second sheet that are not the embossed protrusions (from the first sheet of the pair of sheets) to face each other. Looking at the portion surrounded by the embossed convex portion that is not convex (hereinafter, referred to as a non-embossed convex portion), the top of the embossed convex portion of the second sheet and the first sheet are not embossed convex. The part of the part (the part which is surrounded by the embossed convex part and does not become convex when viewed from the second sheet, hereinafter referred to as a non-embossed convex part) is opposed to each other. The tops of the embossed protrusions may be in contact with opposing non-embossed protrusions. In addition, the tops of the embossed protrusions may be bonded to opposite non-embossed protrusions.

Of the pair of sheets, the first sheet has an embossed portion and a non-embossed portion. The embossed portion is formed with a plurality of embossed convex portions and a plurality of non-embossed convex portions. The non-embossed portion is not formed with any of the plurality of embossed convex portions and the plurality of non-embossed convex portions. In addition, among the pair of sheets, the second sheet has an embossed portion and does not have a non-embossed portion. That is, only a plurality of embossed convex portions and a plurality of non-embossed convex portions are formed in the second sheet.

In a 1st form, a pair of sheet material is comprised so that the 1st sheet material which has an embossed part and a non-embossed part, and the 2nd sheet material which has an embossed part and does not have a non-embossed part oppose. In this configuration, since the non-embossed portions do not face each other between the pair of sheets, a non-embossed space is not formed between the first sheet and the second sheet (by the non-embossed portions facing each other) and a space that is easily collapsed with respect to the load in the thickness direction). Therefore, the strength of the sanitary tissue paper in the thickness direction under load can be improved, and the absorption performance at the time of load can be improved (for example, the bleed-through of oil and the like can be reduced).

In addition, even in such a structure in which the non-embossed portions do not face each other between such a pair of sheets, since the non-embossed portions are arranged in the sanitary tissue paper, the non-embossed portions can be interposed in the sanitary tissue paper through the non-embossed portions. Partial diffusion oil, etc. Therefore, according to the first aspect, even if there is no non-embossed space, the diffusibility of the absorbed oil and the like can be maintained.

In addition, in such a structure in which no non-embossed space exists between such a pair of sheets, of course, there is no intersection (portion where oil and the like are likely to accumulate) where the non-embossed space intersects, so that it is possible to improve the diffusibility of oil, etc., Reduces bleed-through of oil, etc.

Moreover, in the sanitary tissue paper, since the non-embossed space becomes a part that exerts the design property, if the non-embossed space does not exist, the design property is deteriorated. However, in the first aspect, since the non-embossed space is formed only on the first sheet Since the non-embossed part of 1 is arranged in the sanitary tissue paper, the design property can be maintained even if there is no non-embossed space.

In addition, in the first aspect, the pair of sheets has a nested lamination structure, and the second sheet of the pair has a sheet formed of only the embossed portion, so that the use and use of sanitary tissue can be reduced. The contact area of the object, even if a load is applied during use, the space inside the sanitary tissue paper is not easily collapsed. In addition, the absorption rate can be maintained without providing a non-embossed space between the pair of sheets, and the weight per square meter and the thickness of the paper can be reduced while improving the absorption performance under load, and the sanitary tissue paper can be thinned. thickness of.

In a 2nd aspect, among the above-mentioned two or more sheets, there is an end sheet located at at least one of both ends in the overlapping direction, and the end sheet has a plurality of embossed protrusions and a plurality of An embossed portion of a non-embossed convex portion and a non-embossed portion in which a plurality of embossed convex portions and a plurality of non-embossed convex portions are not formed. At least one of both ends in the overlapping direction refers to the uppermost or lowermost end when the overlapping direction is placed in the up-down direction, and constitutes the front or back of the sanitary tissue paper. Further, the end sheet is the sheet located at the uppermost or lowermost end, that is, the sheet constituting the front or back of the sanitary tissue paper.

In the second aspect, since the end sheet having the non-embossed portion in this way is positioned at one end of the both ends in the overlapping direction, the sheet having the non-embossed portion that can exhibit design is arranged on the sanitary sheet The front or back of the page. Therefore, it is possible to provide sanitary tissue paper with good visibility from the outside.

In a 3rd aspect, the said edge part sheet|seat consists of the said 1st sheet|seat which has the said non-embossed part. The first sheet constitutes a part of a pair of sheets formed in a nested manner, and the strength of the pair of sheets formed in a nested manner against a load in the thickness direction is high. That is, in the third aspect, the first sheet (the one having the non-embossed portion) is arranged in a pair of sheets formed in a nested manner on the front or back of the sanitary tissue paper directly subjected to the load in the thickness direction. Sheet). Therefore, even when the non-embossed space does not exist in the sanitary tissue paper, the strength of the sanitary tissue paper in the thickness direction against a load can be improved, and the design property can be maintained.

In a 4th aspect, among the above-mentioned two or more sheets, there is an end sheet located at at least one of both ends in the overlapping direction, and the end sheet has a plurality of embossed convex portions and a plurality of The embossed portion of the non-embossed convex portion does not have a non-embossed portion in which a plurality of embossed convex portions and a plurality of non-embossed convex portions are not formed. That is, the edge sheet has only the embossed portion in which the plurality of embossed convex portions and the plurality of non-embossed convex portions are formed.

In the fourth aspect, by positioning the end sheet having only the embossed portion at one end of the both ends in the overlapping direction in this way, there is no resistance to load compared with the sheet having the non-embossed portion. The sheet of the non-embossed portion with high strength in the thickness direction is arranged on the front or back of the sanitary tissue paper. That is, since a sheet having high strength against the load in the thickness direction can be arranged on the front or back of the sanitary tissue paper directly subjected to the load in the thickness direction, the thickness direction strength of the entire sanitary tissue paper can be improved.

In a 5th aspect, an edge part sheet|seat consists of the said 2nd sheet|seat which does not have the said non-embossed part. That is, the end sheet is constituted by a sheet having only the embossed portion. The second sheet having only the embossed portion constitutes a part of a pair of sheets formed in the nested form, and the second sheet formed in the nested form is relative to the thickness direction even in the sheet having only the embossed portion. The load strength is also higher.

That is, in the fifth aspect, a sheet having no non-embossed portion (a sheet having only an embossed portion) among a pair of sheets formed in a nested manner is disposed at at least one of both end portions in the overlapping direction. material). Therefore, a sheet having higher strength with respect to the load in the thickness direction can be arranged on the front or back of the sanitary tissue paper directly subjected to the load in the thickness direction, so that the strength in the thickness direction of the entire sanitary tissue paper can be further improved. .

In the sixth aspect, the two or more sheets each have two or more sheet regions, and the non-embossed portion is formed in at least one of the sheet regions of the first sheet. In the non-embossed region of the second sheet, only the embossed region that does not have the non-embossed portion is formed in the sheet region of the second sheet.

The sheet region refers to a divided range when each sheet is divided into arbitrary sizes, and two or more sheets each having two or more sheet regions means that the divided range is two or more. In addition, the embossed region refers to a sheet region that does not have a non-embossed portion in the sheet region (a sheet region that has only an embossed portion), and the non-embossed region refers to a sheet that has a non-embossed portion in the sheet region. material area (sheet area with embossed and non-embossed parts). In addition, when a non-embossed region is formed in at least one sheet region, and two or more sheet regions are included, a non-embossed region is formed in a part of the sheet region and an embossed region is formed in the other part of the sheet region And the case where the non-embossed area|region is formed in the whole sheet|seat area of 2 or more sheet|seat areas.

In a 6th aspect, the non-embossed area|region formed by at least one sheet|seat area|region of a 1st sheet|seat among the sheet|seat area|regions divided in this way opposes only the embossing part formed in a 2nd sheet|seat. That is, in each area|region between a pair of sheets, it arrange|positions so that a non-embossing part may not overlap each other (a non-embossing space is not formed). Therefore, even if the area of the non-embossed region formed in the first sheet is increased, since there is no non-embossed space, the strength in the thickness direction against the load can be maintained, and the absorption performance under load can be improved. Moreover, even if a non-embossed space does not exist, since the non-embossed area|region formed in the 1st sheet|seat exists, the fall of the dispersibility of an oil component etc. can be suppressed and designability can be maintained.

In the seventh aspect, the non-embossed portion is formed of a plurality of patterns. The pattern of the non-embossed portion is the contour shape of the non-embossed portion formed in the first sheet when viewed from the opposing second sheet in which the embossed portion is formed. By using a plurality of patterns of the non-embossed portion, the design properties of the sanitary tissue paper can be improved. Moreover, since the non-embossed area|region formed in the 1st sheet increases, the dispersibility of oil etc. can be improved.

In the eighth aspect, two adjacent patterns among the patterns are rotationally symmetric by 360°/n. Here, n is an integer of 1 or more. In addition, 360°/n rotational symmetry means that when the pattern is rotated by 360°/n around the virtual axis, the pattern after rotation overlaps with the pattern before rotation. In addition, the shape of a pattern is not specifically limited, All shapes, such as a circle, a triangle, a quadrangle, a polygon, a cross, and a heart, can be used. In addition, the number of figures constituting the pattern is not limited to one, and may be composed of a plurality of figures, and the plurality of figures may have different shapes.

By forming two adjacent patterns on the first sheet so as to have such a rotationally symmetric positional relationship, the non-embossed portions can be regularly arranged on the first sheet. That is, the pattern of the non-embossed portion can be a geometric pattern in the entire sanitary tissue paper. Therefore, even if a non-embossing space does not exist, the fall of the dispersibility of oil etc. can be suppressed, and designability can be maintained.

In the ninth aspect, two adjacent patterns among the plurality of patterns are line-symmetrical. Line symmetry means that when the pattern is reversed about an imaginary straight line as an axis, the pattern after the reversal overlaps the pattern before the reversal. By forming two adjacent patterns on the first sheet so as to have such a line-symmetrical positional relationship, the non-embossed portions can also be regularly arranged on the first sheet (the pattern of the non-embossed portion is The whole sanitary tissue paper can exhibit a geometric pattern), so it is possible to suppress a decrease in the dispersibility of oil and the like, and maintain the designability.

In a 10th aspect, the said non-embossed part does not have an intersecting part. Having no intersecting portion means that there is no portion intersecting within the non-embossed portion in the first sheet, or that the non-embossed portions do not intersect each other. By adopting such a configuration, a portion where the oil content and the like may remain in the non-embossed portion is not formed, so that the diffusion property of the oil content and the like can be reliably improved, and the through-printing of the oil content and the like can be reduced.

In the eleventh aspect, the area ratio of the non-embossed portion is 3 to 16%. The area ratio of the non-embossed portion means the ratio of the area of the non-embossed portion occupied by the surface of the first sheet (sanitary tissue). The area ratio of the non-embossed portion formed in the first sheet is preferably 5 to 13%, and more preferably 6 to 11%. When the area ratio of the non-embossed portion is less than 3%, there is a possibility that sufficient dispersibility of oil and the like cannot be obtained. In addition, when the area ratio of the non-embossed portion exceeds 13%, since the number of embossed convex portions is small, there is a possibility that sufficient strength in the thickness direction at the time of load cannot be obtained.

According to one aspect of the present invention, it is possible to provide a sanitary tissue paper having excellent absorbency under load while maintaining absorbency and design.

100‧‧‧kitchen paper

ED‧‧‧Embossed recesses

NE‧‧‧Non-embossed protrusions

10‧‧‧ Crepe paper

EC‧‧‧Embossed protrusions

11‧‧‧First sheet area

12‧‧‧Second sheet area

13‧‧‧3rd sheet area

14‧‧‧4th sheet area

20‧‧‧ Crepe paper

21‧‧‧5th sheet area

22‧‧‧6th sheet area

23‧‧‧7th sheet area

24‧‧‧8th sheet area

30‧‧‧Embossed part

31‧‧‧1st embossing area

32‧‧‧Second embossing area

33‧‧‧3rd embossing area

34‧‧‧4th embossing area

40‧‧‧Embossed part

41‧‧‧1st embossing area

42‧‧‧Second embossing area

43‧‧‧3rd embossing area

44‧‧‧4th embossing area

NC‧‧‧Embossed parts

50‧‧‧Non-embossed part

51‧‧‧First non-embossed area

52‧‧‧Second non-embossed area

53‧‧‧3rd non-embossed area

54‧‧‧4th non-embossed area

60‧‧‧Non-embossed part

62‧‧‧Second non-embossed area

64‧‧‧4th non-embossed area

70‧‧‧ area

71‧‧‧Area 1

72‧‧‧Second area

73‧‧‧Region 3

74‧‧‧Sector 4

FIG. 1 : is a figure which shows the kitchen paper which concerns on embodiment (Example 1) of this invention.

(A) and (B) of FIG. 2 are views showing crepe paper constituting the kitchen paper of FIG. 1 .

3 : is a figure which shows the kitchen paper which concerns on embodiment (Example 2) of this invention.

(A) and (B) of FIG. 4 are views showing crepe paper constituting the kitchen paper of FIG. 3 .

5 : is a figure which shows the kitchen paper which concerns on embodiment (Example 3) of this invention.

(A) and (B) of FIG. 6 are views showing crepe paper constituting the kitchen paper of FIG. 5 .

It is a figure which shows the kitchen paper which concerns on embodiment (Example 4) of this invention.

(A)-(C) of FIG. 8 is a figure which shows the crepe paper which comprises the kitchen paper of FIG. 7. FIG.

Fig. 9 is a view showing kitchen paper according to an embodiment (Example 5) of the present invention.

(A)-(C) of FIG. 10 is a figure which shows the crepe paper which comprises the kitchen paper of FIG. 9. FIG.

It is a figure which shows the kitchen paper which concerns on embodiment (Example 6) of this invention.

(A)-(C) of FIG. 12 is a figure which shows the crepe paper which comprises the kitchen paper of FIG. 11. FIG.

Fig. 13 is a view showing a kitchen paper according to an embodiment (Example 7) of the present invention.

(A)-(C) of FIG. 14 is a figure which shows the crepe paper which comprises the kitchen paper of FIG. 13. FIG.

FIG. 15 is a diagram illustrating a method of measuring oil absorption performance.

FIG. 16 is a view showing kitchen paper according to Comparative Example 1. FIG.

(A) and (B) of FIG. 17 are views showing crepe paper constituting the kitchen paper of FIG. 16 .

FIG. 18 is a view showing kitchen paper according to Comparative Example 2. FIG.

(A) and (B) of FIG. 19 are views showing crepe paper constituting the kitchen paper of FIG. 18 .

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. In addition, the same code|symbol is attached|subjected to the part common to each figure, and description may be abbreviate|omitted. FIG. 1 : is a figure which shows the kitchen paper which concerns on embodiment (Example 1) of this invention. (A) and (B) of FIG. 2 is a figure which shows the 1st sheet|seat and the 2nd sheet|seat which comprise the kitchen paper of FIG. 1. FIG.

As shown in FIGS. 1 and 2 , the kitchen paper 100 has crepe paper 10 and crepe paper 20 . The form of the kitchen paper 100 is not particularly limited, and a roll type in which strip-shaped kitchen paper with perforated lines for dividing arranged at appropriate intervals is wound around a paper tube, or a so-called pick-up type can be used. ), pop-up type, etc., a stacking type formed by folding and stacking a single sheet of kitchen paper. The kitchen paper 100 is an example of the sanitary tissue paper of the present invention, and the crepe papers 10 and 20 are examples of the first and second sheets constituting the sanitary tissue paper of the present invention.

As the crepe paper 10 , a paper in which pulp is used as the raw material of the base paper is used. As the pulp composition, a conventional composition of kitchen paper can be used. For example, the mixing ratio of pulp can be 50 mass % or more, preferably 90 mass % or more, and more preferably 100 mass %. In addition, the crepe paper 20 can also use the same paper as the crepe paper 10 .

For the pulp composition, for example, softwood pulps such as NBKP (softwood kraft pulp) and NUKP (unbleached softwood pulp), and hardwood pulps such as LBKP (hardwood kraft pulp) and LUKP (unbleached hardwood pulp) can be used in an appropriate ratio. In particular, it is preferable to use a pulp composition having a larger composition of conifer pulp than that of hardwood pulp. The ratio of conifer pulp to hardwood pulp is preferably 50:50 to 80:20.

In addition, as the crepe paper 10 and 20, the paper whose weight per square meter is 15-30 g/m< ² > based on JIS P 8124 (1998) is used. When the weights per square meter of crepe papers 10 and 20 are adjusted to this range, when liquids such as water and oil come into contact with the paper surface, sufficient liquid diffusibility is obtained, and particularly high water absorption performance is obtained. Moreover, in the weight per square meter in this range, the softness|flexibility and followability at the time of using as kitchen paper can be acquired.

In creped paper 10, a plurality of embossed convex portions EC and embossed concave portions ED corresponding to embossed convex portions EC are formed on the front and back surfaces of creped paper 10. The top part of each embossing convex part EC (or the opening part of the embossing concave part ED) has a square shape in plan view. Moreover, the side surface of the embossing convex part EC (or the embossing concave part ED) is formed in the taper which is not shown in figure from the bottom part of the embossing concave part ED toward the opening part.

The embossing convex portion EC is formed on one surface of the crepe paper 10 by pressing a convex embossing roller (not shown) against the crepe paper 10 by a conventional steel-rubber type embossing method, and the embossing concave portion ED is The other surface of the crepe paper 10 is formed as embossed concave portions corresponding to the embossed convex portions EC.

Crepe paper 10 has embossed portion 30 and non-embossed portion 50 . The embossed portion 30 is formed with a plurality of embossed convex portions EC and a plurality of non-embossed convex portions NE. On the other hand, in the non-embossed portion 50, neither the plurality of embossed convex parts EC nor the plurality of non-embossed convex parts NE are formed.

Here, the non-embossed convex portion NE refers to a portion surrounded by a plurality of embossed convex portions EC where the convex portion is not formed. In addition, the embossing part 30 and the non-embossing part 50 are an example of the embossing part and the non-embossing part formed in a 1st sheet material among a pair of sheets which comprise the sanitary tissue paper of this invention.

In the crepe paper 20, a plurality of embossed convex portions EC and embossed concave portions ED corresponding to the embossed convex portions EC are formed on the front and back surfaces of the creped paper 10. The top part of each embossing convex part EC (or the opening part of the embossing concave part ED) has a square shape in plan view. Moreover, the side surface of the embossing convex part EC (or the embossing concave part ED) is formed in the taper which is not shown in figure from the bottom part of the embossing concave part ED toward the opening part. The embossed convex portion EC is formed on one surface of the creped paper 20 by pressing a convex embossing roller against the creped paper 20 similarly to the creped paper 10, and the embossed concave portion ED is an embossing corresponding to the embossed convex portion EC. The concave portion is formed on the other surface of the crepe paper 20 .

The crepe paper 20 has an embossed portion 40 and does not have a non-embossed portion. The embossed portion 40 is formed with a plurality of embossed convex portions EC and a plurality of non-embossed convex portions NE. That is, the crepe paper 20 is formed with only the plurality of embossed convex portions EC and the plurality of non-embossed convex portions NE. Here, the non-embossed convex portion NE refers to a portion surrounded by a plurality of embossed convex portions EC where the convex portion is not formed. In addition, the embossing part 40 is an example of the embossing part and the non-embossing part formed in the 2nd sheet material among a pair of sheets which comprise the sanitary tissue paper of this invention.

In the kitchen paper 100 of the present embodiment, the crepe paper 10 and the crepe paper 20 are overlapped, and the embossed convex portions EC and EC are formed to face each other in a nested manner to be integrated. Specifically, the embossed convex portion EC of the creped paper 10 is arranged to face the non-embossed convex portion NE (portion where the embossed convex portion EC is not provided) of the creped paper 20 . On the other hand, the embossed convex portion EC of the crepe paper 20 is arranged to face the non-embossed convex portion NE (portion where the embossed convex portion EC is not provided) of the creped paper 10 .

In addition, the top of the embossed convex portion EC of the crepe paper 10 is adhered to the non-embossed convex portion NE of the crepe paper 20 by an adhesive agent (not shown). By adhering the tops of the embossed convex portions EC of the crepe paper 10 to the non-embossed convex portions NE of the crepe paper 20, the adhering portions of the two crepe papers 10 and 20 can be arranged in a good balance on one crepe paper ( crepe paper 10) side. Therefore, it is possible to reduce the decrease in absorption performance due to the adhesive.

Moreover, the conventional adhesive used for the kitchen paper which has a laminated structure can be used as an adhesive. Examples of such adhesives include cellulose-based adhesives such as polyvinyl alcohol, starch, modified starch, and carboxymethyl cellulose.

In addition, instead of attaching the top of the embossed convex portion EC of the creped paper 10 to the non-embossed convex portion NE of the creped paper 10, the top of the embossed convex portion EC of the creped paper 20 may be bonded to the non-embossed convex portion NE of the creped paper 10. The flower convex part is NE glued. In addition, the top of the embossed convex portion EC of the crepe paper 10 may be bonded to the non-embossed convex portion NE of the creped paper 20, and the top of the embossed convex portion EC of the creped paper 20 may be bonded to the non-embossed portion of the creped paper 10. The convex portion NE is bonded.

In this embodiment, as shown in FIG. 1 , the embossed portion 30 and the non-embossed portion 50 of the creped paper 10 are formed with the embossed portion 30 in the creped paper 10 so as to face the embossed portion 40 of the creped paper 20 . In addition to the non-embossed portion 50 , only the embossed portion 40 is formed on the crepe paper 20 . By adopting such a structure, the non-embossed portions do not face each other between the crepe paper 10 and the crepe paper 20 , so that there is no non-embossed space easily crushed between the crepe paper 10 and the crepe paper 20 . Therefore, according to this embodiment, since the strength of the kitchen paper 100 in the thickness direction under load can be improved, the absorption performance under load can be improved (for example, the penetration of oil and the like of the kitchen paper 100 can be reduced).

In addition, even in the structure in which the non-embossed parts do not face each other between the crepe paper 10 and the crepe paper 20, since the non-embossed parts 50 are arranged in the kitchen paper 100, oil and the like can also pass through the non-embossed part in the kitchen paper 100 The embossed portion 50 is diffused. Therefore, according to the present embodiment, even if the non-embossed space is not formed, the diffusibility of the absorbed oil and the like can be maintained.

In addition, in the structure in which the non-embossed space does not exist between the crepe paper 10 and the crepe paper 20 as in the present embodiment, of course, there is no intersection (a part where oil and the like tend to accumulate) where the non-embossed space intersects. Therefore, the According to the present embodiment, it is possible to improve the diffusibility of oil content and the like, and to reduce the strike-through of oil content and the like.

Moreover, in this embodiment, since the non-embossed part 50 is arrange|positioned in the kitchen paper 100, even if it does not form a non-embossed space, it can maintain a design property.

In addition, in the present embodiment, since the laminated structure of the nested form is adopted and there is a sheet formed with only the embossed portion having no non-embossed portion, it is possible to reduce the use of the kitchen paper 100 and the use of objects (for example, The contact area of tableware, fried food, etc.), even if a load is applied during use, the space in the kitchen paper 100 is hard to be crushed. Therefore, according to the present embodiment, the weight per square meter and the paper thickness of the crepe papers 10 and 20 can be reduced while the absorption performance under load can be improved, and the thickness of the kitchen paper 100 can be reduced.

In addition, in the present embodiment, crepe paper (edge sheet) located at one end of both ends of the crepe paper 10 and 20 in the overlapping direction (the uppermost end when the overlapping direction is placed in the up-down direction) is made of non-embossed crepe paper (edge sheet). The crepe paper 10 of the part 50 is constituted. That is, the sheet|seat which formed the non-embossed part in which the several embossed convex part EC and the some non-embossed convex part were not formed is arrange|positioned on the surface of the kitchen paper 100.

In the present embodiment, the crepe paper 10 having the non-embossed portion 50 is located at the uppermost end in the stacking direction of the sheets, so the crepe paper 10 having the non-embossed portion 50 that can exhibit design is arranged on the surface of the kitchen paper 100 . Therefore, the visibility of the kitchen paper 100 from the outside is good.

In addition, crepe paper 10 constitutes a part of a pair of sheets that overlap with crepe paper 20 in a nested form, and a pair of crepe paper formed in a nested form has high strength against a load in the thickness direction. In the present embodiment, the crepe paper 10 having the non-embossed portion 50 is arranged on the surface of the kitchen paper 100 directly subjected to the load in the thickness direction, so even when there is no non-embossed space inside the kitchen paper 100 , the strength of the kitchen paper 100 in the thickness direction against a load can also be improved, and the design property can be maintained.

In addition, in the present embodiment, crepe paper (edge sheet) located at one end of both ends of the crepe paper 10 and 20 in the overlapping direction (the lowermost end when the overlapping direction is placed in the vertical direction) is made of a crepe paper (edge sheet) that does not have a non-pressed The crepe paper 20 of the flower part is constituted. That is, on the back surface of the kitchen paper 100, only the embossing part 40 in which the several embossing convex part EC and the several non-embossing convex part NE were formed is arrange|positioned.

In the present embodiment, the crepe paper 20 having only the embossed portion 40 (without the non-embossed portion) is located at the lowest end in the stacking direction of the sheets, so that the back surface of the kitchen paper 100 that is directly loaded in the thickness direction can be placed on the back surface of the kitchen paper 100 Since crepe paper having high strength against a load in the thickness direction is arranged, the strength in the thickness direction of the kitchen paper 100 can be improved.

In addition, the crepe paper 20 constitutes a part of a pair of sheets that overlap with the crepe paper 10 in a nested form, and the pair of crepe paper formed in a nested form has a high strength against a load in the thickness direction. In the present embodiment, crepe paper 20 having only the embossed portion 40 (without the non-embossed portion) is arranged on the back surface of the kitchen paper 100 directly subjected to the load in the thickness direction, so that it is possible to directly receive the load in the thickness direction. The strength of the thickness direction of the kitchen paper 100 can be reliably increased by arranging crepe paper with higher strength against the load in the thickness direction on the back surface of the kitchen paper 100 under the load in the direction.

In addition, in the present embodiment, the kitchen paper 100 has two or more regions, and the crepe papers 10 and 20 constituting the kitchen paper 100 each have two or more regions (sheet regions). As shown in FIG. 2(A) , the crepe paper 10 has sheet regions (the first sheet region 11 , the second sheet region 12 , the third sheet region 13 , and the fourth sheet region 14 ) that do not have The area of the non-embossed portion 50 and the area with the non-embossed portion 50 . On the other hand, as shown in FIG. 2(B), in the sheet regions of crepe paper 20 (the fifth sheet region 21, the sixth sheet region 22, the seventh sheet region 23, and the eighth sheet region 24) Only the area|region which does not have a non-embossed part is formed. That is, the area|region which has the non-embossed part 50 is arrange|positioned so that it may overlap with the area|region which does not have a non-embossed part.

Specifically, as shown in FIG. 1 , the kitchen paper 100 has an area 70 that can be divided into four areas. The area 70 can be divided into a first area 71 to a fourth area 74 . In the area 70, the embossed portion 30 of the crepe paper 10 and the embossed portion 40 of the crepe paper 20 are arranged in the first area 71 and the third area 73, and the embossed portion 30 of the crepe paper 10 is arranged in the second area 72 and the fourth area 74. The non-embossed part 50 and the embossed part 40 of the crepe paper 20 .

The embossed portion 30 of the crepe paper 10 is divided into the first embossed region 31 to the fourth embossed region 34, and the non-embossed portion 50 of the crepe paper 10 is divided into the second non-embossed region 52 and the fourth non-embossed region 52 The area 54 divides the embossed portion 40 of the crepe paper 20 into the first embossed area 41 to the fourth embossed area 44 . In this way, among the four regions of the kitchen paper 100, in the first region 71, the first embossed region 31 of the crepe paper 10 is opposite to the first embossed region 41 of the crepe paper 20, and in the second region 72, the crepe paper The second non-embossed region 52 of the paper 10 is opposite to the second embossed region 42 of the crepe paper 20 , and the third region 73 is the third embossed region 33 of the crepe paper 10 and the third embossed region of the crepe paper 20 On the other hand, in the fourth region 74 , the fourth non-embossed region 54 of the crepe paper 10 is opposed to the fourth embossed region 44 of the crepe paper 20 .

In this embodiment, the non-embossed portion 50 of the crepe paper 10 is arranged in the second and fourth regions 72 and 74 , and the non-embossed portion is not formed in the crepe paper 20 . In such a configuration, the non-embossed regions 52 and 54 of the non-embossed portion 50 arranged in two of the four regions of the kitchen paper 100 are different from each other between the crepe paper 10 and the crepe paper 20 because the non-embossed portions are different from each other. Therefore, a non-embossed space (a space that is easily crushed) is not formed in which the non-embossed portions are opposed to each other. Therefore, the area of the non-embossed region of the non-embossed portion 50 formed on the crepe paper 10 can be increased, and the strength in the thickness direction against a load can be improved, so that the absorption performance under load can be improved. In addition, even if the area of the non-embossed region of the non-embossed portion 50 formed on the crepe paper 10 is increased, since there is no non-embossed space, the absorption performance under load can be maintained at a high level, and the dispersion of oil and the like can be suppressed. Reduce the performance and maintain the design performance.

3 : is a figure which shows the kitchen paper which concerns on Example 2 mentioned later in this embodiment. (A) and (B) of FIG. 4 are views showing crepe paper constituting the kitchen paper of FIG. 3 . In the example of FIG. 3 , among the four regions 70 of the kitchen paper 100 , the non-embossed portion 50 of the crepe paper 10 and the embossed portion 40 of the crepe paper 20 are arranged in each of the first region 71 to the fourth region 74 .

The non-embossed portion 50 of the crepe paper 10 is divided into the first non-embossed region 51 to the fourth non-embossed region 54, and the embossed portion 40 of the creped paper 20 is divided into the first embossed region 41 to the fourth embossed region 41 area 44. In this way, among the four regions of the kitchen paper 100, in the first region 71, the first non-embossed region 51 of the crepe paper 10 is opposed to the first embossed region 41 of the crepe paper 20, and in the second region 72, the crepe paper The second non-embossed region 52 of the paper 10 is opposite to the second embossed region 42 of the crepe paper 20 , and the third region 73 is the third non-embossed region 53 of the crepe paper 10 and the third embossed region of the crepe paper 20 On the other hand, in the fourth region 74, the fourth non-embossed region 54 of the crepe paper 10 is opposed to the fourth embossed region 44 of the crepe paper 20.

In the embodiment of FIG. 3 , the non-embossed portion 50 of the crepe paper 10 is arranged in the first region 71 to the fourth region 74 of the kitchen paper 100 , and the non-embossed portion is not formed in the crepe paper 20 . In this configuration, the non-embossed regions 51 to 54 of the non-embossed portion 50 arranged in all of the four regions of the kitchen paper 100 are different from each other between the crepe paper 10 and the crepe paper 20 due to the non-embossed regions 51 to 54 . In contrast, a non-embossed space (a space that is easily crushed) is not formed in which the non-embossed portions are opposed to each other. Therefore, the area of the non-embossed region of the non-embossed portion 50 formed on the crepe paper 10 can be increased, and the strength in the thickness direction under load can be improved, so that the absorption performance under load can be further improved. In addition, in the example of FIG. 3, since the non-embossing space does not exist, by increasing the area of the non-embossed region formed in the non-embossed portion 50 of the crepe paper 10, the absorption under load can be maintained at a high level. performance, while further suppressing the decrease in dispersibility of oil components and the like, and further maintaining design properties.

In the present embodiment, as shown in FIGS. 1 and 3 , the non-embossed portion 50 of the crepe paper 10 is formed of a plurality of patterns. The pattern of the non-embossed portion 50 is the contour shape of the non-embossed portion 50 formed on the crepe paper 10 when viewed from the opposite crepe paper 20 in which the embossed portion 40 is formed. Specifically, one pattern is formed in the non-embossed region 52 of the crepe paper 10 , and the other pattern is formed in the non-embossed region 54 of the crepe paper 10 . By using a plurality of patterns of the non-embossed portion 50 in this manner, the design properties of the sanitary tissue paper can be improved. Moreover, since the non-embossed area|region formed in the 1st sheet increases, the dispersibility of oil etc. can be improved.

In addition, in this embodiment, the pattern of the some non-embossing part 50 formed in the crepe paper 10 is 360 degree/n rotational symmetry. Here, n is an integer of 1 or more. Specifically, in the example of FIGS. 1 and 2 , the pattern formed in the non-embossed region 52 and the pattern formed in the non-embossed region 54 are 180° rotationally symmetric. In addition, in the example of FIG.3 and FIG.4, the pattern formed in the non-embossed area|regions 51 and 52 and the pattern formed in the non-embossed area|region 53 and 54 are 180 degree rotational symmetry.

In addition, the shape of the pattern of a non-embossed part is arbitrary. In the present embodiment, in the example of FIG. 1 , as shown in FIGS. 1 and 2 , the shape of the pattern is a cross. In addition, in the example of FIG. 3, as shown in FIG.3 and FIG.5, in each non-embossing area|region 51-54, the shape of a pattern is a rectangle. Furthermore, in the example of FIG. 3 , four patterns are formed in the non-embossed regions 51 and 53 , and 12 patterns are formed in the non-embossed regions 52 and 54 .

By forming the pattern as the non-embossed portion 50 of the crepe paper 10 having such a rotationally symmetrical positional relationship, the non-embossed portion 50 can be regularly arranged between the crepe paper 10 and the crepe paper 20 . That is, as shown in FIGS. 1 and 3 , when the pattern of the non-embossed portion 50 is viewed from the entire kitchen paper 100, a geometric pattern can be presented. Therefore, even if a non-embossing space is not provided, the fall of the dispersibility of oil etc. can be suppressed, and designability can be maintained.

In addition, if the viewing mode is changed, in the present embodiment, as shown in FIGS. 1 and 3 , the patterns of the plurality of non-embossed portions 50 formed in the crepe paper 10 are line-symmetrical. Specifically, in the example of FIGS. 1 and 2 , the pattern formed in the non-embossed area 52 and the pattern formed in the non-embossed area 54 are line objects. In addition, in the example of FIG. 3 and FIG. 4, the pattern formed in the non-embossed areas 51 and 52 and the pattern formed in the non-embossed areas 53 and 54 are line-symmetrical.

By forming the non-embossed portions 50 having such a line-symmetrical positional relationship in the crepe paper 10, the non-embossed spaces can be regularly arranged between the crepe paper 10 and the crepe paper 20 without forming a non-embossed space. Since the embossed part 50 can suppress the fall of the dispersibility of an oil component etc. reliably, it can maintain a design property.

In the present embodiment, the non-embossed portion 50 of the crepe paper 10 and the non-embossed portion 60 of the crepe paper 20 are configured not to have intersecting portions. That is, in the non-embossed part 50 of the crepe paper 10, there is no part where the non-embossed parts intersect each other. For example, in the example of FIG. 1, the embossing convex part NC is formed in the part which can become the intersection part of the non-embossing part 50 of the crepe paper 10. In addition, in the example of FIG. 3, since the pattern of a non-embossed part is a several independent rectangular pattern, a non-embossed part does not cross|intersect.

By setting the structure without such an intersecting portion, there is no intersecting portion in the non-embossed portions 50 and 60 where oil and the like may remain, so that the diffusibility of oil and the like can be reliably improved and the permeation of oil and the like can be reduced. print.

In addition, in this embodiment, the area ratio of the non-embossed portion 50 of crepe paper 10 and the non-embossed portion 60 of crepe paper 20 (the area ratio of the non-embossed portion occupied by the surface of the sheet on which the non-embossed portion is formed) area ratio) is 3 to 16%, preferably 5 to 13%, more preferably 6 to 11%. When the area ratio of the non-embossed portions 50 and 60 is less than 3%, there is a possibility that sufficient dispersibility of oil and the like cannot be obtained. Moreover, when the area ratio of the non-embossed parts 50 and 60 exceeds 13%, since the number of the embossed convex parts is small, there is a possibility that sufficient strength in the thickness direction under load cannot be obtained.

5 and 6 are diagrams showing kitchen paper according to the present embodiment (Example 3). The crepe paper 10 is not formed with a non-embossed portion, but the crepe paper 20 is formed with a non-embossed portion 60 . In this configuration, crepe paper (edge sheet) at one end of both ends in the overlapping direction (the lowermost end when the overlapping direction is placed in the up-down direction) of the crepe papers 10 and 20 has a non-embossed portion 60 . 20 of crepe paper. That is, on the back surface of the kitchen paper 100, the sheet|seat which formed the non-embossed part in which the some embossed convex part EC and the some non-embossed convex part were not formed is arrange|positioned.

In the present embodiment, since the crepe paper 20 having the non-embossed portion 60 is located at the lowest end in the stacking direction of the sheets, the crepe paper 20 having the non-embossed portion 60 that can exhibit design is arranged on the back surface of the kitchen paper 100 . Therefore, the visibility of the kitchen paper 100 from the outside is good.

7 and 8 are diagrams showing the kitchen paper according to the present embodiment (Example 4), FIGS. 9 and 10 are diagrams showing the kitchen paper according to the present embodiment (Example 5), and FIG. 11 12 is a diagram showing the kitchen paper according to the present embodiment (Example 6), and FIGS. 13 and 14 are diagrams showing the kitchen paper according to the embodiment (Example 7) of the present invention.

All of the kitchen paper 100 shown in FIGS. 7 to 14 are integrated by stacking three sheets of crepe paper. Specifically, in addition to the crepe paper 10 and the crepe paper 20, the crepe paper 110 or the crepe paper 120 is further stacked and integrated. For example, in the examples of FIGS. 7 and 8 , the crepe paper 10 is formed with the non-embossed portion 50 , and the crepe paper 20 and the crepe paper 110 are not formed with the non-embossed portion.

In addition, in the example of FIG. 9 and FIG. 10, the crepe paper 10 and the crepe paper 20 are formed with the non-embossed part 50 and the non-embossed part 60, and the crepe paper 110 is not formed with the non-embossed part.

In addition, in the example of FIG. 11 and FIG. 12, the non-embossed part is not formed in crepe paper 10, and the non-embossed part 60 and the non-embossed part 160 are formed in crepe paper 20 and crepe paper 120.

In addition, in the example of FIG. 13 and FIG. 14, the non-embossed part 50 is formed in the crepe paper 10, the non-embossed part 160 is formed in the crepe paper 120 without being formed in the crepe paper 20, and the crepe paper 120 is formed.

In the kitchen paper 100 shown in FIGS. 7 to 14 , among the three superimposed crepe papers, the crepe paper with the non-embossed portion formed thereon and the crepe paper without the non-embossed portion are all stacked in a nested manner. There are no non-embossed spaces between crepe papers that are stacked in a nested form that can easily collapse. Therefore, even when three sheets of crepe paper are stacked and integrated, the strength in the thickness direction of the kitchen paper 100 against a load can be improved, and thus the absorption performance under load can be improved. Furthermore, even if there is no non-embossed space between crepe papers stacked in a nested manner, the presence of the non-embossed portion can maintain the diffusibility of absorbed oil and the like.

In addition, in the example of FIG. 7, FIG. 9, and FIG. 13, the crepe paper (edge part sheet) located in the uppermost end in the overlapping direction among the three crepe papers is constituted by the crepe paper 10 having the non-embossed portion 50. In addition, in the example of FIG. 11 and FIG. 13, the crepe paper (edge part sheet) located in the lowermost end in the overlapping direction among the three crepe papers is constituted by the crepe paper 120 having the non-embossed portion 160.

That is, the crepe paper 10 or the crepe paper 120 having the non-embossed portion 50 or the non-embossed portion 160 that can exhibit design properties is arranged on the front or back of the kitchen paper 100 . Therefore, even when three sheets of crepe paper are stacked to increase the thickness of the kitchen paper 100, the visibility of the kitchen paper 100 from the outside is good.

In addition, in the example of FIG. 7 and FIG. 9, the crepe paper (edge part sheet) located in the lowest end in the overlapping direction among the three sheets of crepe paper consists of crepe paper 110 which does not have a non-embossed part. In addition, in the example of FIG. 11, the crepe paper (edge part sheet) located in the uppermost end in the overlapping direction among the three crepe papers is constituted by the crepe paper 10 which does not have a non-embossed part.

That is, since crepe paper (crepe paper formed only by the embossed portion) having high strength against the load in the thickness direction is arranged on the front or back of the kitchen paper 100 directly subjected to the load in the thickness direction, even when the overlap 3 Even when the thickness of the kitchen paper 100 is increased by using crepe paper, the strength in the thickness direction of the kitchen paper 100 can be increased, so that the oil absorption performance under load can be maintained.

【Example】

Hereinafter, the present embodiment will be described in more detail with reference to Examples. In addition, this embodiment is not limited to these Examples. The measurement and evaluation of each Example and Comparative Example were performed as follows.

[Original paper]

<Weight per square meter>

The weight per square meter (grammage) (g/m ² ) of crepe paper (base paper) used in the test was calculated according to JIS P 8124 (1998).

<Paper Thickness (Song)>

)。此時，設為僅載置柱塞。柱塞的端子為金屬製，使直徑30mm的圓形的平面與紙平面垂直地抵接。該紙厚的測定時的負荷在120μm時約為70gf。應予說明，紙厚的測定值為進行10次測定而得到的平均值。 The paper thickness (5 sheets overlapping) (mm) of the kitchen paper was measured. The method for measuring the paper thickness of kitchen paper is as follows: a test piece cut into 12 cm×12 cm is subjected to sufficient humidity conditioning under the conditions of JIS P 8111 (1998), and then a dial thickness gauge (thickness measuring device) is used under the same conditions. ) "PEACOCK G type" (manufactured by Ozaki, Ltd.) was measured. The specific procedure of the measurement is as follows: It is confirmed that there is no dirt, dust, etc. between the plunger and the measuring table, the plunger is lowered on the measuring table, and the scale of the dial thickness gauge is moved to align with the zero point. Next, lift the plunger, place the test piece on the test table, slowly lower the plunger, and read the measured value at this time (

). At this time, it is assumed that only the plunger is placed. The terminal of the plunger was made of metal, and a circular plane with a diameter of 30 mm was brought into contact with the plane of the paper perpendicularly. The load at the time of measuring the paper thickness was about 70 gf at 120 μm. In addition, the measurement value of paper thickness is the average value obtained by performing 10 measurements.

[Oil absorption test]

))、底紙(使將複印用紙裁切成約12cm×12cm的紙為5片)的各重量。測定後，在塑膠製的片材上載置試驗片，在試驗片的中央載置壓鐵。應予說明，壓鐵設置有在厚度方向貫通的孔。孔的直徑約為12mm。 For the test method of oil absorption, the test piece was cut into 12 cm x 12 cm. Using an electronic balance (HR300 manufactured by A&D Co., Ltd., etc.), the plastic sheet (approximately 12 cm×12 cm, thickness 0.2 mm, weight 2.7 g, material polypropylene), test piece, and weight (approximately 12 cm in diameter, approx. 82mm, thickness 10mm, weight 59g, material acrylic resin (

)) and the weight of the base paper (cut the copy paper into 5 pieces of paper of about 12 cm×12 cm). After the measurement, the test piece was placed on the plastic sheet, and the weight was placed in the center of the test piece. In addition, the weight which penetrates in the thickness direction is provided with the hole. The diameter of the hole is about 12mm.

Then, 2.3 ml (about 2.0 g) of oil (salad oil at room temperature) (manufactured by Nissin Oliver Group Co., Ltd.) was dropped from the hole of the iron weight using a pipette (Finnpipette F2, 0.5 to 5 ml, manufactured by Thermo Scientific Co., Ltd.). of Nissin salad oil). At this time, as shown in FIG. 15, the dripping position (embossing part) was previously fixed to the center position of the test piece.

After 2 minutes of dropwise addition, the weight was removed and the weight was measured. Then, the plastic sheet was removed, and the weight was measured. Then, after measuring the weight of the test piece and placing it on the backing paper, the weight of the test piece (finally retained oil amount) and the oil amount of the backing paper (unretained oil amount) were further measured 5 minutes later.

量)(g)、滴加油量(g)、最終保持量(g)、透印總量(g)、相對於滴加油量的試驗片吸油率(%)、透印率(%)、回液率(%)、最終保持率(%)、透印總率(%)進行測定，示於表1。 For each test piece, as shown in FIG. 15 , the oil absorption (g), the print-through amount (g), and the liquid return amount (g) of the test piece were measured.

amount) (g), drip oil amount (g), final holding amount (g), total print through (g), test piece oil absorption relative to drip oil amount (%), print through rate (%), return The liquid ratio (%), the final retention ratio (%), and the total print-through ratio (%) were measured and shown in Table 1.

Each item, such as the oil absorption amount (g) of a test piece, was calculated by the following formula.

. Test piece oil absorption (g) = test piece weight after 2 minutes of dripping - test piece weight

. The amount of print through (g) = the weight of the plastic sheet after 2 minutes of dripping - the weight of the plastic sheet

. Liquid return amount (g) = weight of iron weight after dripping for 2 minutes - weight of iron weight

. Oil dripping amount (g) = oil absorption amount of test piece + printing amount + liquid return amount

． Final holding amount (g) = test piece weight after 5 minutes - test piece weight

． Final print-through (g)=weight of backing paper after 5 minutes - weight of backing paper

． Total amount of print-through (g) = print-through amount + final print-through amount

． Test piece oil absorption rate (%) = test piece oil absorption ÷ drip oil amount × 100

． Print-through rate (%) = print-through amount ÷ drip oil amount × 100

． Liquid return rate (%) = liquid return amount ÷ drip oil amount × 100

. Final retention rate (%) = final retention amount ÷ drip oil amount × 100

. Final strikethrough rate (%) = final strikethrough amount ÷ drip oil quantity × 100

. Total print-through rate (%) = total print-through ÷ oil drop × 100

In addition, the test piece oil absorption amount (g), print-through amount (g), liquid return amount (g), drip oil amount (g), final retention amount (g), final print-through amount (g), print-through amount Each measurement value of the total amount (g) is an average value obtained by performing three measurements. From these test pieces oil absorption (g), etc., the test piece oil absorption rate (%), print-through rate (%), liquid return rate (%), final retention rate (%), final print-through rate (%), and print-through rate were calculated. Total rate (%).

[Example 1]

面積率)設為8.4%，將全部壓花凸部的容積設為10738mm²，將非壓花部50的面積率設為10.8%。將實施例1的條件和結果示於表1。 In Example 1, the kitchen paper 100 shown in FIGS. 1 and 2 was used. In Example 1, two sheets of crepe paper 10 and 20 using a base paper with a fiber raw material of 100 mass % and a grammage of 22.1 g/m ² as the base paper were stacked in the up-down direction. As for the embossing conditions, a nested form was used, the pattern of the non-embossed portion 50 was a cross, and the cross had no intersecting portion, the number of embossed convex portions was 2090/144 cm ² , and the Adhesion area ratio of embossed convex portion EC of crepe paper 10 and non-embossed convex portion NE of crepe paper 20 (paste

area ratio) was set to 8.4%, the volume of all embossed convex portions was set to 10738 mm ² , and the area ratio of the non-embossed portion 50 was set to 10.8%. The conditions and results of Example 1 are shown in Table 1.

[Example 2]

In Example 2, the kitchen paper 100 shown in FIGS. 3 and 4 was used. In Example 2, the basis weight of the base paper was set to 21.5 g/m ² , the pattern of the non-embossed portion 50 was set to a shape in which four elongated rectangles were arranged at predetermined intervals in the embossing conditions, and the Except that the number of embossed convex portions was 2105/144 cm ² , the volume of all embossed convex portions was set to 10759 mm ² , and the area ratio of the non-embossed portion 50 was set to 10.7%, the same procedure as in Example 1 was performed. Do the same. Table 1 shows the conditions and results of Example 2.

[Example 3]

In Example 3, the kitchen paper 100 shown in FIGS. 5 and 6 was used. In Example 3, it carried out similarly to Example 1 except that the non-embossed part was not formed in the crepe paper 10, and the non-embossed part 60 was formed in the crepe paper 20. The conditions and results of Example 3 are shown in Table 1. In addition, in the kitchen paper 100 of Example 3, the crepe paper 10 and 20 of the kitchen paper 100 of Example 1 were arrange|positioned upside down and reversed.

[Example 4]

In Example 4, the kitchen paper 100 shown in FIGS. 7 and 8 was used. In Example 4, crepe paper 110 having only the embossed portion 130 (without the non-embossed portion) was superimposed on the lower surface of the kitchen paper 100 (refer to FIGS. 1 and 2 ) of Example 1, and the crepe paper 110 was The same procedure as in Example 1 was carried out except that the embossed convex portion EC was bonded to the non-embossed convex portion NE of the crepe paper 20 (three sheets of crepe paper were stacked and integrated). The conditions of Example 4 are shown in Table 1.

[Example 5]

In Example 5, the kitchen paper 100 shown in FIGS. 9 and 10 was used. In Example 5, the kitchen paper 100 (refer to FIGS. 1 and 2 ) of Example 1 consists of crepe paper 20 having non-embossed portion 60 and crepe paper having only embossed portion 130 (without non-embossed portion). In the case of the crepe paper 110, the crepe paper 10 having the non-embossed portion 50 was superimposed on the upper surface of Example 1, and the embossed convex portion EC of the creped paper 10 was adhered to the non-embossed convex portion NE ( The same procedure as in Example 1 was carried out, except that three sheets of crepe paper were stacked and integrated). The conditions and results of Example 5 are shown in Table 1.

[Example 6]

In Example 6, the kitchen paper 100 shown in FIGS. 11 and 12 was used. In Example 6, the crepe paper 120 having the non-embossed portion 160 was superimposed on the lower surface of the kitchen paper of Example 3 (see FIGS. 5 and 6 ), and the embossed convex portions EC of the crepe paper 120 were adhered to the crepe paper. 20 non-embossed convex portions NE (three sheets of crepe paper were stacked and integrated) were carried out in the same manner as in Example 3. The conditions of Example 6 are shown in Table 1.

[Example 7]

In Example 7, the kitchen paper 100 shown in FIGS. 13 and 14 was used. In Example 7, crepe paper 120 having non-embossed portions 160 was superimposed on the lower surface of the kitchen paper of Example 1 (see FIGS. 1 and 2 ), and embossed convex portions EC of crepe paper 120 were adhered to the crepe paper. The non-embossing convex part NE of 20 (three sheets of crepe paper was stacked and integrated) was carried out in the same manner as in Example 1. Table 1 shows the conditions and results of Example 7.

[Comparative Example 1]

In Comparative Example 1, the kitchen paper 100 shown in FIGS. 16 and 17 was used. In Comparative Example 1, the same procedure as in Example 1 was performed except that the top-to-top form was adopted, the area ratio of the non-embossed portion 50 was set to 37.4%, and the pattern of the non-embossed portion 50 was set to a lattice shape. In Comparative Example 1, the non-embossed portion 50 and the non-embossed portion 60 are formed to face each other, and the non-embossed space LN having the intersecting portion CP is formed. Table 1 shows the conditions and results of Comparative Example 1.

[Comparative Example 2]

In Comparative Example 2, the kitchen paper 100 shown in FIGS. 18 and 19 was used. In the comparative example 2, it carried out similarly to Example 1 except having used the base paper of the basis weight of 21.2 g/m< ² >. As for the embossing conditions, the pattern of the non-embossed portion 50 was a honeycomb shape, the number of embossed convex portions was 2172/144 cm ² , and the embossed convex portions EC of the crepe paper 10 and the non-embossed portions EC of the crepe paper 20 were Except that the adhesive area ratio of the embossed convex portion NE was set to 8.1%, the volume of all embossed convex portions was set to 13275 mm ² , and the area ratio of the non-embossed portions 50 and 60 was set to 19.1%, the same as the Examples 1 Do the same. In Comparative Example 2, the non-embossed portion 50 and the non-embossed portion 60 are formed to face each other, and the non-embossed space LN having the intersecting portion CP is formed. Table 1 shows the conditions and results of Comparative Example 2.

According to Table 1, in Examples 1 to 7, both the oil absorption rate and the final retention rate of the test piece with respect to the dripping oil amount were higher than those of Comparative Example 1 and Comparative Example 2. In addition, the liquid return rate of the test piece with respect to the dripping oil amount was lower than that of Comparative Example 1 and Comparative Example 2. That is, it was shown that the oil retention performance of Example 1 and Example 2 is high. In particular, Examples 1 to 3 showed high oil retention performance compared to Comparative Example 2 having the same nested-type laminated structure (two-layer sheet).

In addition, in Examples 1 to 7, as compared with Comparative Example 1 and Comparative Example 2, both the print-through ratio and the total print-through ratio with respect to the dripping oil amount were lower. This result shows that in Examples 1 to 7, the oil bleed-through (hard to bleed) was suppressed. In particular, compared with Comparative Example 2 having the same nested-form laminated structure (two-layer sheet), Examples 1 to 3 also showed that oil was difficult to pass through.

In addition, in Example 1 and Example 3, or Example 5 and Example 6, the positions of crepe paper on which the non-embossed portion was formed were vertically opposite, but compared with Comparative Example 2 in the same nesting form, Both maintained high oil retention properties. From this result, it can be seen that the high oil retention performance can be exhibited regardless of the front and back surfaces of the kitchen paper 100 on the surfaces in contact with the articles to be used.

In addition, even if the design is compared, since the non-embossed portion is arranged in the entire kitchen paper 100 in Examples 1 to 7, the design is not as good as in Comparative Example 1 and Comparative Example 2 in which there is a non-embossed space. Difference.

The preferred embodiments of the present invention have been described above in detail, but 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.

10‧‧‧ Crepe paper

52‧‧‧Second non-embossed area

54‧‧‧4th non-embossed area

70‧‧‧ area

71‧‧‧Area 1

72‧‧‧Second area

73‧‧‧Region 3

74‧‧‧Sector 4

100‧‧‧kitchen paper

NC‧‧‧Embossed parts

Claims (11)

A sanitary tissue paper is a sanitary tissue paper in which two or more sheets are stacked and integrated, comprising at least two sheets adjacent in the overlapping direction among the two or more sheets, and the two or more sheets are A pair of sheets in which a plurality of embossed convex portions and embossed concave portions corresponding to the embossed convex portions are formed on each of the front and back surfaces, the pair of sheets having the forming surfaces of the embossed convex portions to be embedded A first sheet material and a second sheet material facing each other in the form of a sleeve, the first sheet material having an embossed portion formed with a plurality of embossed convex portions and a plurality of non-embossed convex portions, and a plurality of embossed convex portions not formed and a non-embossed portion having a plurality of non-embossed convex portions, wherein the second sheet has an embossed portion formed with a plurality of embossed convex portions and a plurality of non-embossed convex portions, and does not have a plurality of embossed portions not formed A convex portion and a non-embossed portion of a plurality of non-embossed convex portions. The sanitary tissue paper according to claim 1, comprising an end sheet located at at least one of both ends in the overlapping direction among the two or more sheets, and the end sheet There are embossed portions in which a plurality of embossed convex portions and a plurality of non-embossed convex portions are formed, and a non-embossed portion in which a plurality of embossed convex portions and a plurality of non-embossed convex portions are not formed. The sanitary tissue paper according to claim 2, wherein the edge sheet is the first sheet having the non-embossed portion. The sanitary tissue paper according to claim 1, comprising an end sheet located at at least one of both ends in the overlapping direction among the two or more sheets, and the end sheet It has an embossed portion in which a plurality of embossed convex portions and a plurality of non-embossed convex portions are formed, and does not have a non-embossed portion in which a plurality of embossed convex portions and a plurality of non-embossed convex portions are not formed. The sanitary tissue paper according to claim 4, wherein the end sheet is the second sheet that does not have the non-embossed portion. The sanitary tissue paper according to any one of claims 1 to 5, wherein each of the two or more sheets has two or more sheet regions, and the first sheet is in the sheet region of the first sheet. A non-embossed region having the non-embossed portion is formed in at least one sheet region among them, and only an embossed region that does not have the non-embossed portion is formed in the sheet region of the second sheet. The sanitary tissue paper according to claim 1, wherein the non-embossed portion is formed of a plurality of patterns. The sanitary tissue paper according to claim 7, wherein two adjacent patterns among the plurality of patterns are rotationally symmetric by 360°/n, wherein n is an integer of 1 or more. The sanitary tissue paper according to claim 7, wherein two adjacent patterns among the plurality of patterns are line-symmetrical. The sanitary tissue paper according to claim 1, wherein the non-embossed portion has no intersecting portion. The sanitary tissue paper according to claim 1, wherein the area ratio of the non-embossed portion is 3 to 16%.

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