TWI764992B - sanitary tissue paper - Google Patents

Abstract

The present invention provides a sanitary tissue paper excellent in absorbency under load. The above-mentioned sanitary tissue paper is a first sheet having a plurality of embossed convex portions and embossed concave portions corresponding to the embossed convex portions formed on the front and back, and a plurality of embossed convex portions and a plurality of embossed convex portions formed on the front and back surfaces. A sanitary tissue paper in which the second sheet of the embossed concave portion corresponding to the embossed convex portion is integrated with the first sheet and the second sheet in a nested manner so that the embossed convex portions are formed facing each other. The above-mentioned first sheet has a first embossed portion formed with a plurality of embossed convex portions and a plurality of non-embossed convex portions, and a first non-embossed convex portion without a plurality of embossed convex portions and a plurality of non-embossed convex portions. An embossed portion, wherein the second sheet has a second embossed portion in which a plurality of embossed convex portions and a plurality of non-embossed convex portions are formed, and a second embossed portion in which a plurality of embossed convex portions and a plurality of non-embossed convex portions are not formed. 2nd non-embossed part, the said 1st non-embossed part opposes the said 2nd embossed part, and the said 2nd non-embossed part opposes the said 1st embossed part.

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. For conventional sanitary tissue paper, in order to impart oil and moisture absorbing performance, each sheet is embossed to form convex parts on one surface and concave parts corresponding to the convex parts on the other surface. The sheets are laminated so that a space (embossing space) is formed 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 and oil absorption amount, retention amount, absorption speed, etc.), the uneven portion (non-embossed) of each sheet is formed without embossing. The non-embossed space that opposes a flower part), and oil etc. pass through this non-embossed space, and the absorption performance of oil etc. 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 a portion that is not a convex portion (which does not become a convex portion when viewed from the opposite crepe paper) so that the top of the convex portion of one crepe paper is located on the other crepe paper. Kitchen paper in the form of a nested structure in which the convex parts are arranged differently from each other in the manner of part or non-embossed convex parts and are bonded. Furthermore, Japanese Patent Laying-Open No. 2008-208501 (Patent Document 3) discloses kitchen paper provided with intersecting linear non-embossed spaces inside.

prior art 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 (top-to-top laminated structure), there is a problem that the strength to the lamination direction (thickness direction) is weak, and when sanitary tissue paper is used (for example, in a kitchen spread on a plate) When fried food is placed on the paper), oil and the like absorbed by the load seep out (print through) to the back side of the sanitary tissue paper (for example, a plate on which 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 a load in the thickness direction is lowered.

In addition, by reducing the non-embossed space, the strength in the thickness direction can be improved, but since the area of the non-embossed portion of each sheet is reduced, the designability is reduced, and the space volume of the non-embossed space is reduced due to oil content, etc. The diffusivity 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 which is excellent in absorbency under load while maintaining diffusibility and design.

In order to solve the above-mentioned problems, a first aspect of the present invention is a sanitary tissue paper having a first sheet having a plurality of embossed convex portions and embossed concave portions corresponding to the embossed convex portions formed on the front and back surfaces, and A second sheet in which a plurality of embossed convex portions and embossed concave portions corresponding to the embossed convex portions are formed on the front and back surfaces, and the first sheet and the second sheet are embossed in a nested manner. The sanitary tissue paper in which the forming surfaces of the parts are opposed to each other and integrated, wherein the first sheet has a first embossed part in which a plurality of embossed convex parts and a plurality of non-embossed convex parts are formed, and a first embossed part in which a plurality of embossed convex parts is not formed; part and a first non-embossed part of a plurality of non-embossed convex parts, and the second sheet has a second embossed part formed with a plurality of embossed convex parts and a plurality of non-embossed convex parts, and a second embossed part not formed with a plurality of An embossed convex portion and a second non-embossed portion of a plurality of non-embossed convex portions, the first non-embossed portion and the second embossed portion are opposite, and the second non-embossed portion and the first embossed portion relatively.

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. In addition, regarding the use of the sanitary tissue paper, both household and business use sanitary tissue paper can be targeted.

As the first sheet, conventional crepe paper used for sanitary tissue paper can be used. The embossed convex portion is a convex portion formed on the first 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 first sheet. The non-embossed convex portion means a portion surrounded by a plurality of embossed convex portions where no convex portion is formed.

For the second sheet, conventional crepe paper used for sanitary tissue paper may be used, and the same material as the first sheet may be used. The embossed convex portion is a convex portion formed on the second sheet by embossing. The embossed concave portion is a concave portion formed integrally with the embossed convex portion front and back in the second sheet. The non-embossed convex portion means a portion surrounded by a plurality of embossed convex portions where no convex portion is formed.

Putting the first sheet and the second sheet in a nested manner so that the embossed protrusions are formed facing each other means that the top of the embossed protrusions of the first sheet and the part of the second sheet that are not the embossed protrusions ( Viewed from the first sheet, the portion that is not convex or the non-embossed convex portion surrounded by the embossed convex portion is opposed to the top of the embossed convex portion of the second sheet and the non-embossed convex portion of the first sheet. The part (the part that does not become a convex part or the non-embossed convex part surrounded by the embossed convex part when viewed from the second sheet) is opposite to each other. Additionally, the tops of the embossed protrusions may be bonded to opposing non-embossed protrusions.

The first sheet further has a first embossed portion and a first non-embossed portion. A plurality of embossed convex portions and a plurality of non-embossed convex portions are formed in the first embossed portion. On the other hand, in the 1st non-embossed part, neither a plurality of embossed convex parts nor a plurality of non-embossed convex parts were formed.

Moreover, the 2nd sheet material further has a 2nd embossing part and a 2nd non-embossing part. A plurality of embossed convex portions and a plurality of non-embossed convex portions are formed in the second embossed portion. On the other hand, in the 2nd non-embossed part, neither a plurality of embossed convex parts nor a plurality of non-embossed convex parts were formed.

In the first aspect, the first embossed portion and the first embossed portion are formed in the first sheet so that the first non-embossed portion and the second embossed portion face each other and the second non-embossed portion faces the first embossed portion. A non-embossed part, a 2nd embossed part and a 2nd non-embossed part are formed in the 2nd sheet.

In this configuration, since the non-embossed portions do not face each other between the first sheet and the second sheet, a non-embossed space is not formed between the first sheet and the second sheet (by A space where the non-embossed portions are formed to face each other and are easily crushed with respect to a load in the thickness direction). Therefore, since the strength in the thickness direction against a load can be improved, the absorption performance at the time of a load can be improved (for example, the bleed-through of oil and the like can be reduced).

In addition, in the structure in which the non-embossed portion arranged on the first sheet and the non-embossed portion arranged on the second sheet do not face each other, since the non-embossed portions are scattered in the sanitary tissue paper, oil content etc. are easily spread through the non-embossed part. Therefore, according to the first aspect, even if there is no non-embossed space, it is possible to maintain the diffusibility of the absorbed oil and the like, and to suppress a decrease in the absorption rate.

In addition, since there is no non-embossed space between the first sheet and the second sheet, and of course, there is no intersection where the non-embossed space intersects (portion where oil and the like tend to accumulate), it is possible to improve the diffusibility of oil and the like. , Reduce the see-through of oil, etc.

In addition, in sanitary tissue paper, since the non-embossed space becomes a part that exhibits design properties, if there is no non-embossed space, the design property is deteriorated. However, in the first aspect, since the non-embossed parts are scattered on the In the sanitary tissue paper, the design can be maintained even if there is no non-embossed space.

In addition, due to the use of the nested lamination structure, the contact area of the sanitary tissue paper with the object to be used can be reduced, and even if a load is applied during use, the space in the sanitary tissue paper is difficult to collapse. Furthermore, even if a non-embossed space is provided between the first sheet and the second sheet, the absorption speed can be maintained, and the absorption performance under load can also be maintained, so that the weight per square meter and paper can be reduced. Thick, can reduce the thickness of sanitary tissue paper.

In the second aspect, each of the first sheet and the second sheet has two or more sheet regions, and a region having the first non-embossed portion is formed in the sheet region of the first sheet. and a region not having the first non-embossed portion, a region having the second non-embossed portion and a region not having the second non-embossed portion are formed in the sheet region of the second sheet, so as to The area|region which has the said 1st non-embossed part and the area|region which has the said 2nd non-embossed part are arrange|positioned so that it may not overlap.

Having two or more sheet regions means that when the sanitary tissue paper is divided into any size in a state where the first sheet and the second sheet are stacked, the divided range is two or more. In addition, each area may be divided into two or more areas.

In the second aspect, the regions having the first non-embossed portion and the region having the second non-embossed portion are arranged so that the regions having the first non-embossed portion do not overlap in each of the regions divided in this manner. Therefore, even in a plurality of regions, the memory In the case of the non-embossed portion, the non-embossed portion does not face between the first sheet and the second sheet (no non-embossed space is formed). Therefore, since the area of the embossing part formed in each sheet|seat increases, the thickness direction intensity|strength with respect to a load can be maintained, and the absorption performance at the time of a load can be improved. Moreover, 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 third aspect, the pattern of the first non-embossed portion facing the second embossed portion and the pattern of the second non-embossed portion facing the first embossed portion are rotationally symmetric at 90°×n . Here, n is an odd number.

The pattern of the non-embossed portion is the outline shape of the non-embossed portion formed on the other sheet when viewed from the opposite sheet on which the embossed portion is formed. In addition, the 90°×n rotational symmetry means that when the pattern is rotated by 90°×n around the virtual axis, the rotated pattern overlaps with the pre-rotated pattern.

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. Furthermore, 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 the non-embossed portions having a pattern in such a rotationally symmetric positional relationship on the first sheet and the second sheet, respectively, the non-embossed portions can be regularly arranged between the first sheet and the second sheet. Embossed part (non-embossed part can present a geometric pattern in the whole sanitary tissue paper). Therefore, even if the non-embossing space does not exist, the fall of the dispersibility of an oil component etc. can be suppressed reliably, and designability can be maintained.

In a 4th aspect, the pattern of the said 1st non-embossed part which opposes the said 2nd embossed part, and the pattern of the said 2nd non-embossed part which opposes the said 1st embossed part are a line symmetry. Line symmetry means that when the pattern is reversed with the virtual straight line as the axis, the reversed pattern overlaps with the unreversed pattern.

By forming the non-embossed parts having a pattern having such a line-symmetrical positional relationship on the first sheet and the second sheet, respectively, the non-embossed parts can also be regularly arranged in the first sheet and the second sheet. Between the two sheets, it is possible to reliably suppress a decrease in the dispersibility of oil and the like, and to maintain the designability.

In a 5th aspect, at least any one of the said 1st non-embossed part and the said 2nd non-embossed part is a structure which does not have an intersecting part. That is, it means that the non-embossed part does not cross|intersect the part in a sheet|seat, or the non-embossed part does not cross|intersect. 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 a 6th aspect, the area ratio of the said 1st non-embossed part and the said 2nd non-embossed part is 3-16 %. The area ratio of the non-embossed portion means the ratio of the area of the non-embossed portion occupied by the front surface of the sheet formed by the non-embossed portion. The area ratio of the non-embossed portion formed in each 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 which is excellent in absorbency under load while maintaining diffusibility and design.

100: kitchen paper

10: Crepe paper

EC1: Embossed convex part

ED1: Embossed recess

NE1: Non-embossed protrusions

11: 1st sheet area

12: 2nd sheet area

13: 3rd sheet area

14: 4th sheet area

20: crepe paper

EC2: Embossed protrusions

ED2: Embossed recess

NE2: Non-embossed protrusions

21: 5th sheet area

22: 6th sheet area

23: 7th sheet area

24: 8th sheet area

30: Embossing part

31: 1st embossing area

32: 2nd embossing area

33: 3rd embossing area

34: 4th embossing area

40: Embossing part

41: 1st embossing area

42: 2nd embossing area

43: 3rd embossing area

44: 4th embossing area

50: Non-embossed part

NC1: Embossed convex part

52: 2nd non-embossed area

54: 4th non-embossed area

60: Non-embossed part

NC2: Embossed convex part

61: 1st non-embossed area

63: 3rd non-embossed area

70: Area

71: Zone 1

72: Zone 2

73: Zone 3

74: Zone 4

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

(A) is a figure which shows the 1st sheet which comprises the kitchen paper of FIG. 1, (B) is a figure which shows the 2nd sheet laminated|stacked on the 1st sheet of (A).

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

(A) is a figure which shows the 1st sheet which comprises the kitchen paper of FIG. 3, (B) is a figure which shows the 2nd sheet laminated|stacked on the 1st sheet of (A).

FIG. 5 is a diagram for explaining a method of measuring oil absorption performance.

FIG. 6 is a view showing kitchen paper according to Comparative Example 1. FIG.

(A) is a figure which shows the 1st sheet which comprises the kitchen paper of FIG. 6, (B) is a figure which shows the 2nd sheet laminated|stacked on the 1st sheet of (A).

FIG. 8 is a view showing kitchen paper according to Comparative Example 2. FIG.

(A) is a figure which shows the 1st sheet which comprises the kitchen paper of FIG. 8, (B) is a figure which shows the 2nd sheet laminated|stacked on the 1st sheet of (A).

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) is a figure which shows the 1st sheet which comprises the kitchen paper of FIG. 1, (B) is a figure which shows the 2nd sheet laminated|stacked on the 1st sheet of (A).

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, a pulp composition having a larger composition of conifer pulp than that of hardwood pulp is preferable. 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 weight per square meter of the crepe papers 10 and 20 is 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 the crepe paper 10, a plurality of embossed convex portions EC1 and embossed concave portions ED1 corresponding to the embossed convex portions EC1 are formed on the front and back surfaces of the creped paper 10. The top part of each embossing convex part EC1 (or the opening part of embossing concave part ED1) has a square shape in planar view. Moreover, the side surface of embossing convex part EC1 (or embossing concave part ED1) is formed in the taper shape which is not shown in figure from the bottom part of embossing concave part ED1 toward opening part.

The embossing convex portion EC1 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 ED1 is formed. The other surface of the crepe paper 10 is formed as embossed concave portions corresponding to the embossed convex portions EC1.

The crepe paper 10 has an embossed portion 30 and a non-embossed portion 50 . A plurality of embossed convex portions EC1 and a plurality of non-embossed convex portions NE1 are formed in the embossed portion 30 . On the other hand, in the non-embossed portion 50, neither the plurality of embossed convex parts EC1 nor the plurality of non-embossed convex parts NE1 are formed. Here, the non-embossed convex portion NE1 refers to a portion in which a convex portion is not formed surrounded by a plurality of embossed convex portions EC1. In addition, the embossing part 30 and the non-embossing part 50 are an example of a 1st embossing part and a 1st non-embossing part which comprise the sanitary tissue paper of this invention.

In the crepe paper 20 , a plurality of embossed convex portions EC2 and embossed concave portions ED2 corresponding to the embossed convex portions EC2 are formed on the front and back surfaces of the creped paper 20 . The top of each embossing convex part EC2 (or the opening part of embossing concave part ED2) has a square shape in planar view. Moreover, the side surface of embossing convex part EC2 (or embossing concave part ED2) is formed in the taper which is not shown in figure from the bottom part of embossing concave part ED2 toward the opening part. The embossed convex portion EC2 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 ED2 is an embossing corresponding to the embossed convex portion EC2. The concave portion is formed on the other surface of the crepe paper 20 .

The crepe paper 20 has an embossed portion 40 and a non-embossed portion 60 . A plurality of embossed convex portions EC2 and a plurality of non-embossed convex portions NE2 are formed in the embossed portion 40 . On the other hand, in the non-embossed part 60, the some embossing convex part EC2 and the some non-embossing convex part NE2 are not formed. Here, the non-embossed convex portion NE2 refers to a portion in which a convex portion is not formed surrounded by a plurality of embossed convex portions EC2. In addition, the embossing part 40 and the non-embossing part 60 are an example of a 2nd embossing part and a 2nd non-embossing part 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 integrated so that the forming surfaces of the embossed convex portions EC1 and EC2 are opposed to each other in a nested manner. Specifically, the embossed convex portion EC1 of the crepe paper 10 and the non-embossed convex portion NE2 (the portion where the embossed convex portion EC2 is not provided) of the creped paper 20 are arranged to face each other. On the other hand, the embossed convex portion EC2 of the crepe paper 20 is arranged to face the non-embossed convex portion NE1 (portion where the embossed convex portion EC1 is not provided) of the creped paper 10 .

In addition, the top part of the embossing convex part EC1 of the crepe paper 10 is adhered to the non-embossing convex part NE2 of the crepe paper 20 by an adhesive agent (not shown). By adhering the top of the embossed convex portion EC1 of the crepe paper 10 to the non-embossed convex portion NE2 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. (creased 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 the top of the embossed convex portion EC1 of the creped paper 10 and the non-embossed portion of the creped paper 20, the top of the embossed convex portion EC2 of the creped paper 20 and the non-embossed convex portion NE1 of the creped paper 10 may be bonded together. The convex portion NE2 is bonded. In addition, the top of the embossed convex portion EC1 of the crepe paper 10 and the non-embossed convex portion NE2 of the creped paper 20 may be bonded, and the top of the embossed convex portion EC2 of the creped paper 20 and the non-embossed portion of the creped paper 10 may be bonded. The convex portion NE1 is bonded.

In the present embodiment, as shown in FIG. 1 , the non-embossed part 50 of crepe paper 10 is opposed to the embossed part 40 of crepe paper 20 , and the non-embossed part 60 of crepe paper 20 and the embossed part of crepe paper 10 are opposite. Conversely, the embossed portion 30 and the non-embossed portion 50 are formed on the crepe paper 10 , and the embossed portion 40 and the non-embossed portion 60 are formed on the crepe paper 20 .

In the embodiment, by adopting such a configuration, between the crepe paper 10 and the crepe paper 20, the non-embossed portion 50 of the crepe paper 10 and the non-embossed portion 60 of the crepe paper 20 do not face each other, so the crepe paper 10 There is no non-embossed space formed with crepe paper 20 that is easily crushed. Therefore, according to the present 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 through-printing of oil and the like in the kitchen paper 100 can be reduced).

In addition, in the structure in which the non-embossed portion 50 of the crepe paper 10 and the non-embossed portion 60 of the crepe paper 20 do not face each other, the non-embossed portions 50 and 60 are dispersedly arranged in the kitchen paper 100, so oil and the like are interposed through the non-embossed portion 60. The embossed parts 50 and 60 are easy to spread. Therefore, according to this embodiment, even if a non-embossed space is not formed, the diffusibility of the absorbed oil component etc. can be maintained, and the fall of an absorption rate can be suppressed.

In addition, in the present embodiment, no non-embossing space is formed between crepe paper 10 and crepe paper 20, and of course there is no intersection (portion where oil content and the like tend to accumulate) where the non-embossing space intersects, so that oil content can be increased. Etc. diffusivity, reduce the print-through of oil, etc.

Moreover, in this embodiment, since the non-embossed parts 50 and 60 are distributed in the kitchen paper 100, even if a non-embossed space is not formed, design property can be maintained.

In addition, in the present embodiment, a layered structure in a nested form is adopted, so it is possible to reduce the contact area of the kitchen paper 100 with the used objects (eg, tableware, fried food, etc.), even if a load is applied during use, the kitchen paper 100 The space within 100 is also hard to squish. Furthermore, even if the non-embossed space is not provided between the crepe paper 10 and the crepe paper 20, the absorption speed can be maintained, and the absorption performance under load can be maintained. 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, and the thickness of the kitchen paper 100 can be reduced.

In addition, in the present embodiment, the kitchen paper 100 has two or more sheet regions. As shown in FIG. 2(A) , the crepe paper 10 has a sheet region (the first sheet region 11 , the second sheet region 12 , the third sheet region 13 and the fourth sheet region 14 ) with non- The area of the embossed portion 50 and the area without 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) A region having the non-embossed portion 60 and a region not having the non-embossed portion 60 are formed. And it arrange|positions so that the area|region which has the non-embossed part 50 and the area|region which has the non-embossed part 60 may not overlap.

Specifically, as shown in FIG. 1 , the kitchen paper 100 has four areas 70 . The four areas 70 can be divided into a first area 71 to a fourth area 74 . Among the four areas 70 , the first area 71 and the third area 70 are The non-embossed portion 60 of the crepe paper 20 is arranged in the region 73 , and the non-embossed portion 50 of the crepe paper 10 is arranged in the second region 72 and the fourth region 74 .

The embossed portion 30 of crepe paper 10 is divided into first embossed regions 31 to 34, and the non-embossed portion 50 of crepe paper 10 is divided into second non-embossed regions 52 and fourth non-embossed regions 54. Divide the embossed portion 40 of the crepe paper 20 into the first embossed region 41 to the fourth embossed region 44, and divide the non-embossed portion 60 of the crepe paper 20 into the first non-embossed region 61 and the third non-embossed region 61. Embossed area 63. In this way, in the four areas of the kitchen paper 100, in the first area 71, the first embossed area 31 of the crepe paper 10 is opposite to the first embossed area 61 of the crepe paper 20, and in the second area 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 63 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 present embodiment, the non-embossed portion 50 of crepe paper 10 is arranged in the second and fourth regions 72 and 74 , and the non-embossed portion 60 of crepe paper 20 is arranged in the first and third regions 71 and 73 . In this configuration, the non-embossed regions 52, 54, 61, and 63 of the non-embossed portions 50, 60 arranged in the four regions do not face each other between the crepe paper 10 and the crepe paper 20, so that the non-embossed portions do not face each other. A non-embossed space (a space easily crushed) in which the non-embossed portions face each other is not formed. Therefore, the area of each non-embossed region 52, 54, 61, 63 of the non-embossed portions 50, 60 formed on each crepe paper can be increased, and as a result, in the present embodiment, the thickness direction of the load can be maintained. Strength, can improve the absorption performance under load. In addition, in the present embodiment, even if there is no non-embossed space, it is possible to suppress a decrease in dispersibility of oil components and the like, and to maintain design properties.

In the present embodiment, the pattern of the non-embossed portion 50 of the crepe paper 10 facing the embossed portion 40 of the crepe paper 20 and the pattern of the non-embossed portion 60 of the crepe paper 20 facing the embossed portion 30 of the crepe paper 10 The pattern is 90°×n rotationally symmetric. Here, n is an odd number. Specifically, as shown in FIG. 1 , the pattern of the non-embossed portion 50 of the crepe paper 10 and the pattern of the non-embossed portion 60 of the crepe paper 20 are rotationally symmetric at 90° or 270°.

In addition, the shape of the pattern of a non-embossed part is arbitrary. In the present embodiment, in Example 1 to be described later, as shown in FIGS. 1 and 2 , the shape of the pattern is a cross. Moreover, as shown in FIG.3 and FIG.4, in Example 2 mentioned later, each non-embossing area|region 52, 54, 61, 63 is comprised by four rectangles.

By forming the non-embossed portions 50 and 60 having such a rotationally symmetrical positional relationship on the crepe papers 10 and 20, respectively, the non-embossed portions can be regularly arranged between the crepe paper 10 and the crepe paper 20. department. That is, as shown in FIG. 1 , the patterns of the non-embossed portions 50 and 60 may appear geometrical patterns when viewed from the entire kitchen paper 100 . Therefore, even if a non-embossing space is not provided, the fall of the dispersibility of an oil component etc. can be suppressed reliably, and a design property can be maintained.

In addition, if the viewing mode is changed, in this embodiment, the pattern of the non-embossed portion 50 of the crepe paper 10 facing the embossed portion 40 of the crepe paper 20 and the crepe paper facing the embossed portion 30 of the crepe paper 10 The pattern of the non-embossed portion 60 of 20 is line-symmetric.

By forming the non-embossed portions 50 and 60 having such a line-symmetrical positional relationship on the crepe papers 10 and 20, respectively, the non-embossed portions can also be regularly arranged between the crepe paper 10 and the crepe paper 20. Since the parts 50 and 60 are formed, it is possible to reliably suppress a decrease in the dispersibility of oil and the like, and to maintain the designability.

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 parts 50 and 60 of the crepe paper 10 and 20, there is no part where the non-embossed parts intersect each other. Specifically, the embossed convex portion NC1 is formed in the portion that can be the intersection of the non-embossed portion 50 of the crepe paper 10 , and the embossed portion is formed in the portion that can be the intersection of the non-embossed portion 60 of the crepe paper 20 . Convex NC2.

By adopting such a structure not having an intersecting portion, since there is no intersecting portion in the non-embossed portions 50 and 60 where oil and the like may remain, the diffusibility of oil and the like can be reliably improved and the through-printing of oil and the like can be reduced. .

In addition, in the present 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 of the non-embossed portion occupied by the surface of the sheet on which the non-embossed portion is formed) ratio) is 3~16%, preferably 5~13%, more preferably 6~11%. 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 components or 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.

【Example】

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

[Base paper] <Weight per square meter> The weight per square meter (grammage) (g/m ² ) of crepe paper (base paper) of kitchen paper 100 used in the test was calculated according to JIS P 8124 (1998) .

<Paper Thickness (Song)> The paper thickness (5 sheets stacked) (mm) of 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.

)。此時，設為僅載置柱塞。柱塞的端子為金屬制，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 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 stand, 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.

[Compression Test] The measurement method of the compression test is as follows: a test piece cut into 12 cm×12 cm is prepared, and a KES-G5 (manufactured by Kato Tech) compression tester is used to measure the initial thickness TO and the thickness TM under load. Measurement conditions were pressurizer area: 2 cm ² , dynamometer: 1 kg, CHECK switch: MES, DEF output sensitivity dial: 2 mm/V, upper limit load: 10 gf/cm ² (SENS: 2, STOROKE SET dial: 1 ), SPEED: 0.02cm/s (SPEED RANGE switch: 0.1, SPEED SET switch: 2), REPEAT SINGLE switch: SHIINGLE, CONTROL switch: INT, STOP switch: OFF. The initial thickness TO refers to the thickness of the test piece when the loading pressure reaches 0.5 g/cm ² , and the thickness TM during loading refers to the thickness of the test piece when the loading pressure reaches the upper limit load (10 gf/cm ² ). The measurement was performed by measuring each of the initial thickness TO and the thickness TM under load three times, rounding off the average value to the third place below the decimal point, and calculating it to the second place below the decimal point. The compression ratio (flattening ratio) under load was calculated from the calculated initial thickness TO and the thickness TM under load. The compression ratio under load was calculated by the following formula. The value is obtained by rounding off the second decimal place to the first decimal place. . Compression ratio (%) under load=(initial thickness TO-thickness TM under load)÷initial thickness TO×100 The thickness TM (mm) under load and the compression ratio (%) under load are shown in Table 1 for reference.

))、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，在塑膠制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。 [Oil Absorption Test] For the test method of oil absorption, a test piece was cut into 12 cm×12 cm. The plastic sheet (about 12 cm×12 cm, thickness 0.2 mm, weight 2.7 g, material polypropylene), test piece, and weight (about 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. 5, the dripping position (embossing part) was previously fixed to the center position of the test piece. After dripping, the time until the oil in the hole of the weight is absorbed to the test piece (the time when the oil is absorbed) and the time until the oil is squeezed out from the diameter of the weight (the time until the oil stain is squeezed out of the weight) combined to measure.

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. At this time, the number of sheets when oil penetrated into the base paper was also measured.

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(%)、吸完油時的時間(s)、油漬從壓鐵擠出為止的時間(s)、滲透 片數(片)，示於表1。 For each test piece, as shown in FIG. 5 , 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 Liquid rate (%), final retention rate (%), total penetration rate (%), time when oil is absorbed (s), time until oil stains are extruded from the iron (s), number of permeated sheets (slices) , 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 penetration rate (%), liquid return rate (%), final retention rate (%), final penetration rate (%), penetration rate (%), and penetration rate (%) were calculated. Printing rate (%).

[Example 1] In Example 1, the kitchen paper 100 shown in FIGS. 1 and 2 was used. In Example 1, the fiber raw material was 100 mass % of pulp and base paper of 22.1 g/m ² was used. As for the embossing conditions, a nested form was adopted, the pattern of the non-embossed portions 50 and 60 was a cross shape and the shape of the cross portion not having the cross shape was used, and the number of embossed convex portions was 2090 pieces/144cm ^2. The adhesive area ratio of the embossed convex part EC1 of crepe paper 10 and the non-embossed convex part NE2 of crepe paper 20 is set to 8.4%, the volume of all embossed convex parts is set to 10738mm ² , and the non-embossed part The area ratio of 50 and 60 was set to 10.8%. The conditions 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, in the embossing conditions, the pattern of the non-embossed parts 50 and 60 was set to a shape in which four elongated rectangles were arranged at predetermined intervals, and the number of embossed convex parts was set to 2137 /144cm ² , the adhesive area ratio of the embossed convex portion EC1 of crepe paper 10 and the non-embossed convex portion NE2 of crepe paper 20 was 8.6%, the volume of all embossed convex portions was 10631 mm ² , and the non-embossed convex portion was Except having made the area ratio of the flower parts 50 and 60 into 6.7%, it carried out similarly to Example 1. The conditions of Example 2 are shown in Table 1.

[Comparative Example 1] In Comparative Example 1, the kitchen paper 100 shown in FIGS. 6 and 7 was used. Also, for the embossing condition, a top-to-top form was used. In Comparative Example 1, the area ratio of the non-embossed parts 50 and 60 was set to 37.4%, the pattern of the non-embossed parts 50 and 60 was made into a lattice shape, and the non-embossed part 50 and the non-embossed part 60 were opposed to each other. is formed, and a non-embossing space LN having a crossing portion CP is formed. The conditions of Comparative Example 1 are shown in Table 1.

[Comparative Example 2] In Comparative Example 2, the kitchen paper 100 shown in FIGS. 8 and 9 was used. As for the embossing conditions, the patterns of the non-embossed portions 50 and 60 were honeycomb shapes, the number of embossed convex portions was 2172/144 cm ² , and the embossed convex portions EC1 of crepe paper 10 and crepe paper 20 were The adhesion area ratio of the non-embossed convex portion NE2 was set to 8.1%, the volume of all the 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%. Example 1 is 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. The conditions of Comparative Example 2 are shown in Table 1.

According to Table 1, when the results of the compression test under load are compared, in Example 1 and Example 2, the initial thickness TO is the same as that of Comparative Example 1 and Comparative Example 2, but the compression ratio under load is compared with that of Comparative Example 1 Small. In addition, the compression ratio under load was the same as that of Comparative Example 2. That is, since Example 1 and Example 2 have a stacked structure in a nested form, it is shown that it is difficult to collapse with respect to a load.

Comparing the results of the oil absorption test, in Examples 1 and 2, the oil absorption rate and the final retention rate of the test piece with respect to the dripping oil amount were higher than those in Comparative Examples 1 and 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 and 2 showed high oil retention performance with respect to Comparative Example 2 having the same nested-form laminated structure.

In addition, in Example 1 and Example 2, compared with the comparative example 1 and the comparative example 2, the penetration rate with respect to the drip oil amount, and the total rate of printing were both lower. This result shows that in Example 1 and Example 2, the strike-through of the oil (hard to bleed out) was suppressed. Especially with respect to the comparative example 2 which has the laminated structure of the same nesting form, it is also shown that the printing ink of the examples 1 and 2 is difficult to pass through.

In addition, when comparing the results of the oil absorption speed test, in Example 1 and Example 2, the speed until the oil was absorbed and the speed until the oil stain was extruded from the weight were both faster than those in Comparative Examples 1 and 2. . That is, in Example 1 and Example 2, it was shown that the absorption rate of oil was high, and the dispersibility of the absorbed oil was improved.

Moreover, even if it compared the design property, since the non-embossed part was arrange|positioned in the whole kitchen paper 100 in Example 1 and Example 2, it was not inferior to the design property of the comparative example 1 and the comparative example 2.

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

20‧‧‧ Crepe paper

52‧‧‧Second non-embossed area

54‧‧‧4th non-embossed area

61‧‧‧First non-embossed area

63‧‧‧3rd non-embossed area

70‧‧‧ area

71‧‧‧Area 1

72‧‧‧Second area

73‧‧‧Region 3

74‧‧‧Sector 4

100‧‧‧kitchen paper

NC1‧‧‧Embossed convex part

NC2‧‧‧Embossed convex part

Claims (6)

A sanitary tissue paper comprising a first sheet in which a plurality of embossed convex portions and embossed concave portions corresponding to the embossed convex portions are formed on the front and back, and a plurality of embossed convex portions formed on the front and back and a second sheet of embossed concave portions corresponding to the embossed convex portions, and the first sheet and the second sheet are integrated in a nested manner so that the embossed convex portions are formed facing each other and integrated. Tissue paper, wherein the first sheet has a first embossed portion in which a plurality of embossed convex portions and a plurality of non-embossed convex portions are formed, and a plurality of embossed convex portions and a plurality of non-embossed convex portions are not formed The first non-embossed portion, the second sheet has a second 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 second non-embossed part of the embossed convex part, the first non-embossed part is opposite to the second embossed part, the second non-embossed part is opposite to the first embossed part, and the A non-embossing space is not formed between the said 1st sheet material and the said 2nd sheet material. The sanitary tissue paper according to claim 1, wherein each of the first sheet and the second sheet has two or more sheet regions, and the first sheet is formed in the sheet region of the first sheet. There are a region having the first non-embossed portion and a region not having the first non-embossed portion, and a region having the second non-embossed portion is formed in the sheet region of the second sheet. The area|region and the area|region which do not have the said 2nd non-embossed part are arrange|positioned so that the area|region which has the said 1st non-embossed part and the area|region which has the said 2nd non-embossed part may not overlap. The sanitary tissue paper according to claim 1, wherein the pattern of the first non-embossed portion facing the second embossed portion and the second non-embossed portion facing the first embossed portion The pattern of the embossed portion is rotationally symmetric by 90°×n, where n is an odd number. The sanitary tissue paper according to claim 1, wherein the pattern of the first non-embossed portion facing the second embossed portion and the second non-embossed portion facing the first embossed portion The pattern of the embossed portion is line-symmetrical. The sanitary tissue paper according to claim 1, wherein at least any one of the first non-embossed portion and the second non-embossed portion does not have an intersecting portion. The sanitary tissue paper according to any one of claims 1 to 5, wherein the area ratio of the first non-embossed portion and the second non-embossed portion is 3 to 16%.

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