JP6523396B2 - Sanitary thin paper - Google Patents

Description

  The present invention relates to hygienic tissue paper.

  BACKGROUND ART Hygienic paper such as toilet paper is known to have a structure in which a plurality of embossed base sheets are stacked.

  For example, Japanese Patent Publication No. 6-28951 (Patent Document 1) discloses a sanitary thin paper provided with a laminated structure of Tip to Tip type. In this sanitary thin paper, the tops of the projections of the two embossed pulps are adhered to each other (see FIGS. 16 to 22).

  Japanese Patent No. 6021532 (Patent Document 2) discloses a sanitary thin paper provided with a laminated structure called design laminate. In this sanitary thin paper, the designability is given by bonding the base paper with an adhesive containing a coloring component.

Japanese Examined Patent Publication No. 6-28951 Patent No. 6021532

  However, the hygienic tissue paper disclosed in Patent Document 1 can not obtain sufficient softness and is easily crushed. Moreover, although the hygienic tissue paper shown by patent document 2 is hard to be crushed, sufficient softness is not obtained. As described above, it is difficult to make the conventional hygienic tissue paper hard to be crushed while obtaining sufficient softness.

  An object of the present invention is to provide a hygienic tissue paper which is soft and resistant to crushing.

  In order to solve the above-mentioned subject, the 1st mode of the present invention is the 1st sheet in which the 1st embossing containing a plurality of 1st embossing convex parts was formed, and the 2nd embossing containing a plurality of 2nd embossing convex parts It is a hygienic tissue paper which has the formed 2nd sheet, piles up and integrates the 1st sheet and the 2nd sheet, and the side of the 1st embossing convex part is the 1st embossing convex part. The second embossed convex portion is inclined such that the area of the top of the first embossed convex portion is smaller than the area of the bottom of the first embossed convex portion from the bottom to the top of the first embossed convex portion The area of the top of the second embossed protrusion is smaller than the area of the bottom of the second embossed protrusion from the bottom of the second embossed protrusion toward the top of the second embossed protrusion. As inclined, the first embossing and the At least one of 2 embossed, the inclination angle of the side surface has two embossments protrusions different, to provide sanitary thin paper. The inclination angle is an angle between the surface on which the bottom of each embossed protrusion is formed and the side surface of each embossed protrusion.

  In the first aspect, non-embossed spaces having different cross-sectional shapes between the sheets are configured by that the inclination angles of the side surfaces of the two embossed projections included in at least one of the first embossing and the second embossing are different. it can. Here, the non-embossed space is a space in which there are no embossed projections formed between the sheets. The presence of such non-embossed spaces can increase the volume of the space formed between the sheets. Since the volume of the space between the sheets increases in this manner, in the first aspect, soft sanitary thin paper can be obtained.

  In addition, in a portion between sheets in which two embossed convex portions having different inclination angles of such side surfaces exist, the force applied in the thickness direction of the sanitary thin paper is in the direction in which the embossed convex portions are arranged (plane direction orthogonal to the thickness direction) Can also be absorbed. In the first aspect, soft sanitary thin paper can be obtained also from such a viewpoint.

  In addition, in the first aspect, since each sheet is supported by the plurality of embossed projections, the strength in the thickness direction of the sanitary thin paper can be increased. Therefore, in the first aspect, it is possible to obtain a hygienic tissue paper which is not easily crushed.

  Furthermore, in the first aspect, since the plurality of embossed convex portions includes two embossed convex portions having different inclination angles of the side surface, shadows are generated in the embossed concave portions corresponding to the embossed convex portions having different inclination angles. It produces a visual three-dimensional effect. Therefore, in the first aspect, it is possible to impart the designability or the designability to the sanitary thin paper.

  In a second aspect, at least one of the plurality of first embossed projections and the plurality of second embossed projections are arranged on a virtual line, and at least one of the first embossing and the second embossing is A hygienic tissue paper is provided, which has a plurality of embossed projections in which the inclination angle of the side varies along the imaginary line.

  In the second aspect, the non-embossed space along the imaginary line by changing the inclination angle of the side surface of at least one of the plurality of first embossing projections and the plurality of second embossing projections along the imaginary line. An undulating arrangement can be formed between the sheets. Thereby, in the second aspect, it is difficult to crush and soften the hygienic tissue paper, and it is possible to enhance the design provided to the hygienic tissue paper.

  In a third aspect, the plurality of first embossed convex portions are arranged on a first imaginary line, and the plurality of second embossed convex portions are arranged on a second imaginary line parallel to the first imaginary line. The first embossed convex portion provides a sanitary thin paper having a plurality of embossed convex portions in which the inclination angle of the side surface changes along the first imaginary line.

  In the third aspect, the non-embossed space undulates along the first imaginary line parallel to the second imaginary line by changing the inclination angles of the side surfaces of the plurality of first embossed convex portions along the first imaginary line. Configurations can be formed between the sheets. Thereby, in the 3rd mode, the design nature given to hygiene thin paper can be improved, raising the softness of hygiene thin paper, crushing resistance.

  A fourth aspect provides a sanitary thin paper in which the plurality of second embossed protrusions have a plurality of embossed protrusions in which the inclination angle of the side changes along the second imaginary line. In the fourth aspect, the inclination angles of the side surfaces of the plurality of second embossed projections change along the second imaginary line, whereby the non-embossed space is formed along the second imaginary line parallel to the first imaginary line. Wavy configurations can be formed between the sheets. Thereby, in the 4th mode, the design nature given to hygienic tissue paper can be further improved, raising the softness of hygienic tissue paper and crushing resistance.

  A fifth aspect provides a sanitary thin paper in which at least one of the plurality of first embossed protrusions and the plurality of second embossed protrusions has a difference in inclination angle of each side within 20 °. In the fifth aspect, by setting the difference between the inclination angles of the side surfaces of the embossing convex portion to 20 ° or less, at least one of the first embossing and the second embossing, two embossings having different inclination angles of the side surfaces. The convex portion can be reliably formed. Therefore, in the fifth aspect, it is possible to enhance the design provided to the sanitary thin paper while surely enhancing the softness and the crushing resistance of the sanitary thin paper.

  A sixth aspect provides a sanitary thin paper in which at least one of the plurality of first embossed convex portions and the plurality of second embossed convex portions has an inclination angle of 60 to 80 ° on the side surface of each embossed convex portion. Do. In the sixth aspect, by setting the inclination angle of the side surface of the embossed convex portion to 60 to 80 °, at least one of the first embossing and the second embossing, two embossed convex portions having different inclination angles of the side surface Can be formed more reliably. Therefore, in the sixth aspect, it is possible to enhance the designability to be imparted to the sanitary thin paper while more surely enhancing the softness and the crushing resistance of the sanitary thin paper.

  A seventh aspect provides a hygienic tissue paper, wherein at least a portion of the phantom line is a curve having a predetermined period. In the seventh aspect, at least a part of the virtual line in which the plurality of embossed projections are arranged is formed by a curve, so that the undulation of the non-embossed space formed along the part of the virtual line is increased. it can. Moreover, since the curve which comprises at least one part of a virtual line has a predetermined | prescribed period, several embossing convex parts in which two embossing convex parts from which the inclination angle of a side differs differ can be arranged regularly in curvilinear form. . Therefore, in the seventh aspect, it is possible to further enhance the design provided to the sanitary thin paper while enhancing the softness and the crushing resistance of the sanitary thin paper.

  The eighth aspect provides a sanitary thin paper in which both the first and second virtual lines are curves having a predetermined cycle. In the eighth aspect, since each of the first virtual line in which the plurality of first embossed convex portions are arranged and the second virtual line in which the plurality of second embossed convex portions are arranged is formed of a curve, The undulation of the non-embossed space formed along can be increased. In addition, since the curve constituting each virtual line has a predetermined cycle, the first embossed convex portion and the second embossed convex portion including two embossed convex portions having different inclination angles of the side surfaces are both ruled to be curved. Can be arranged. Therefore, in the eighth aspect, it is possible to further enhance the design provided to the sanitary thin paper while enhancing the softness and the crushing resistance of the sanitary thin paper.

  A ninth aspect provides a hygiene tissue paper, wherein the curve having the predetermined period is a sinusoidal curve. In the ninth aspect, a plurality of embossed convex portions can be more regularly arranged along the imaginary line by forming the imaginary line with a sine wave-shaped curve. Therefore, in the ninth aspect, it is possible to further enhance the design provided to the sanitary thin paper while enhancing the softness and the crushing resistance of the sanitary thin paper.

  A tenth aspect provides a hygienic tissue paper, wherein the period of the sinusoidal shape is 50-300 mm. In the tenth aspect, when the curve forming the virtual line is a sine wave-shaped curve, by setting the period of the sine wave shape to such a range, the plurality of embossed convex portions can be surely along the virtual line. Can be arranged regularly. Therefore, in the tenth aspect, it is possible to further enhance the design provided to the sanitary thin paper while surely enhancing the softness and the crushing resistance of the sanitary thin paper.

  An eleventh aspect provides a sanitary paper, wherein the amplitude of the sinusoidal shape is 10 to 60 mm. In the eleventh aspect, when the curve forming the virtual line is a sine wave-shaped curve, by setting the amplitude of the sine wave shape to such a range, the plurality of embossed convex portions can be reliably along the virtual line. Can be arranged regularly. Therefore, in the eleventh aspect, it is possible to further enhance the design provided to the sanitary thin paper while surely enhancing the softness and the crushing resistance of the sanitary thin paper.

The twelfth aspect provides a sanitary thin paper in which at least one of the area of the top of the embossed protrusion and the area of the top of the second embossed protrusion is 0.5 to 1.5 mm ² . In the twelfth aspect, each sheet has such a range by making each area of the top of the first embossed protrusion of the first emboss and / or each area of the top of the second embossed protrusion of the second emboss such range Since the embossed convex portion reliably supports, the strength in the thickness direction of the sanitary thin paper can be surely increased.

  A thirteenth aspect provides a sanitary thin paper in which at least one of the area ratio of the top of the first embossed protrusion and the area ratio of the top of the second embossed protrusion is 5 to 10%. In the thirteenth aspect, the area ratio of the top of the first embossed protrusion of the first emboss and / or the area ratio of the top of the second embossed protrusion of the second emboss between the sheets can be set as described above. Interference between the embossed protrusions can be prevented, and a space (non-embossed space) in which the embossed protrusions do not exist can be formed between the sheets. Therefore, it is possible to obtain a hygienic tissue paper which is soft and hard to crush. Furthermore, since the bonding area between the embossed convex portion and the sheet can be reduced, it is possible to suppress the hardening of the sanitary thin paper (reduction of the softness) due to the presence of the bonding portion.

  A fourteenth aspect provides a sanitary thin paper in which at least one of the height of the first embossed convex portion and the height of the second embossed convex portion is 1.0 to 1.7 mm. In the fourteenth aspect, by setting the height of the embossed convex portion in such a range, it is possible to thicken the thickness of the sanitary thin paper while maintaining the strength in the thickness direction of the sanitary thin paper. Therefore, the non-embossed space formed between the sheets can be increased, and the softness can be further enhanced.

Fifteenth aspect, the compressive strength under 500 gf / cm ² load is 5.0gf · cm / cm ² or more, to provide a sanitary thin paper. In a fifteenth aspect, compressive strength under 500 gf / cm ² load by the sanitary thin paper of this range, it is possible to reliably increase the strength of the sanitary thin paper. Therefore, it is possible to reliably obtain hygienic tissue paper which is not easily crushed. In addition, since hygienic tissue paper whose compressive strength under a load of 500 gf / cm ² falls within such a range is easy to be compressed, soft hygiene tissue paper can be reliably obtained.

A sixteenth aspect provides a sanitary tissue paper, wherein the compression ratio under a 50 gf / cm ² load is 70% or less. In the sixteenth aspect, by setting the compression ratio under a load of 50 gf / cm ² to 70% or less, it is possible to reliably obtain a hygiene thin paper which is not easily crushed.

  A seventeenth aspect provides a sanitary thin paper, wherein the first sheet and the second sheet are integrated in a nested manner. In the seventeenth aspect, by integrating the first sheet and the second sheet in a nested form, the strength of the sanitary thin paper can be increased, and it can be made difficult to be crushed in the thickness direction. In addition, with such a configuration, wiped-off moisture can be retained on the sanitary thin paper. Therefore, it is possible to obtain a hygienic tissue paper which is strong and excellent in water absorbability.

  According to one aspect of the present invention, it is possible to provide a hygienic tissue paper that is soft and resistant to crushing.

1 shows a sanitary tissue paper according to an embodiment of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS It is a figure which shows the hygiene thin paper (1st Embodiment) which concerns on this embodiment. It is the sectional view on the AA line of FIG. It is the BB sectional drawing of FIG. It is the CC sectional view taken on the line of FIG. It is the DD sectional view taken on the line of FIG. It is the EE sectional view taken on the line of FIG. It is the FF sectional view taken on the line of FIG. It is a figure which shows the hygiene thin paper (2nd Embodiment) which concerns on this embodiment. It is the sectional view on the AA line of FIG. It is the BB sectional drawing of FIG. It is the CC sectional view taken on the line of FIG. It is the DD sectional view taken on the line of FIG. It is the EE sectional view taken on the line of FIG. It is the FF sectional view taken on the line of FIG. It is a figure which shows the hygienic tissue paper (comparative example 1) formed in the conventional tip-to-tip format. It is the sectional view on the AA line of FIG. It is the BB sectional drawing of FIG. It is the CC sectional view taken on the line of FIG. It is the DD sectional view taken on the line of FIG. It is the EE sectional view taken on the line of FIG. It is the FF sectional view taken on the line of FIG. It is a figure which shows the hygienic tissue paper (Reference example 1) formed in the Nested type. It is the sectional view on the AA line of FIG. It is the BB sectional drawing of FIG. It is the CC sectional view taken on the line of FIG. It is the DD sectional view taken on the line of FIG. It is the EE sectional view taken on the line of FIG. It is the FF sectional view taken on the line of FIG.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the drawings, unless otherwise specified, the same or corresponding components may be denoted by the same reference symbols and description thereof may be omitted.

  FIG. 1 shows a hygiene tissue sheet according to an embodiment of the present invention, and FIG. 2 is a view showing a crepe paper constituting the hygiene tissue sheet (first embodiment) according to the present embodiment. 3 to 8 are a cross-sectional view taken along the line A-A, a cross-sectional view taken along the line B-B, a cross-sectional view taken along the line C-C, a cross-sectional view taken along the line D-D, a cross-sectional view taken along the line E-E, and FIGS. The F line sectional view is shown.

  The toilet paper 100 shown in FIG. 1 shows a first embodiment of a sanitary thin paper according to the present invention. The toilet paper 100 is a roll-type toilet paper in which band-like toilet paper in which perforations for division (not shown) are arranged at appropriate intervals is wound around a paper tube PT. The form of the toilet paper is not limited to the roll type used in the present embodiment, and a laminated type in which sheet-fed toilet paper called a pickup type, pop-up type or the like is folded and laminated can be used.

  In addition, the sanitary thin paper of the present invention is not limited to toilet paper, but includes tissue paper and kitchen paper. In addition, the form of the sanitary thin paper is not limited, and includes dry type sanitary thin paper, water, and wet type sanitary thin paper impregnated with a chemical solution. In addition, applications of sanitary thin paper can be targeted for both household and business use.

  The toilet paper 100 has a crepe paper 10 and a crepe paper 20. The crepe paper 10, 20 is a paper on which fine wrinkles are formed on the surface by applying a blade called a doctor blade at the outlet of the dryer of the paper machine in the sheet making process of the sheet. The crepe paper 10, 20 is an example of the first and second sheets constituting the toilet paper of the present invention.

  As the crepe paper 10, 20, a base paper whose raw material is mainly pulp is used. The pulp composition of the base paper can use the usual composition in toilet paper. For example, the blending ratio of pulp can be 90% by mass or more, preferably 95% by mass or more, and more preferably 100% by mass.

  The pulp composition is, for example, an appropriate ratio of softwood pulp such as NBKP (softwood kraft pulp) and NUKP (softwood unbleached pulp) and hardwood pulp such as LBKP (hardwood kraft pulp) and LUKP (hardwood unbleached pulp). It can be used. For example, the ratio of softwood pulp to hardwood pulp can be 30:70 to 80:20.

Further, as the crepe paper 10, 20, a paper having a predetermined basis weight (or a basis weight) based on JIS P 8124 (1998) is used. The predetermined basis weight is not limited, but can be in the range of 10 to 25 g / m ² , preferably 12 to ²⁰ g / m ² , from the viewpoint of the pliability, water-solubility, wipeability and the like of the toilet paper. It can be a range.

  As shown in FIGS. 2 to 8, the crepe paper 10 has an embossed portion 30 and a non-embossed portion 50. The non-embossed portion 50 indicates a portion which is surrounded by the embossed portion 30 in the crepe paper 10 and in which the embossed portion 30 is not formed.

  The embossed portion 30 is composed of a concave emboss 31 and a convex emboss 32 corresponding to the concave emboss 31. And multiple concave embossing 31 and convex embossing 32 are formed in the front and back of crepe paper 10 (refer to Drawing 2-Drawing 8). In the present embodiment, the convex and concave portions 32 have substantially the same height. In addition, the embossing part 30 is an example of the 1st embossing formed in the 1st sheet which comprises the toilet paper of this invention. Moreover, the convex embossing 32 is an example of the 1st embossing convex part contained in a 1st embossing.

  The concave emboss 31 and the convex emboss 32 of the embossed portion 30 are formed by a conventional embossing method such as a steel rubber method. Specifically, concave embossing 31 is formed on one side of crepe paper 10 by pressing a convex embossing roll (not shown) against crepe paper 10 with the rubber roll, and convex embossing 32 is the other side of crepe paper 10. Is formed corresponding to the concave embossment 31 on the surface of the.

  In the present embodiment, as shown in FIGS. 2 to 8, the side surface 34 of the convex embossing 32 of the crepe paper 10 is directed from the bottom 35 (opening of the concave embossing 31) to the top 33 of the convex embossing 32. Thus, the area of the top 33 of the convex emboss 32 is inclined so as to be smaller than the area of the bottom 35 (the opening of the concave emboss 31) of the convex emboss 32. That is, the convex embossing 32 tapers from the bottom 35 of the convex embossing 32 to the top 33 of the convex embossing 32.

  The side surface 34 of the convex embossing 32 is composed of two side surfaces 34A, 34B. In the two side surfaces 34A and 34B, in FIGS. 3, 5, 6 and 8, the inclination angles θ1 and θ2 of the side surfaces 34A and 34B are all substantially the same (about 70 °). On the other hand, in FIG. 4, the inclination angle θ1 (about 80 °) of the side surface 34A is larger than the inclination angle θ2 (about 60 °) of the side surface 34B. In FIG. 7, the inclination angle θ1 of the side surface 34A (Approximately 60 °) is smaller than the inclination angle θ2 (approximately 80 °) of the side surface 34B. In addition, although inclination-angle (theta) 1-(theta) 4 is shown in FIG.3, FIG. 4, FIG. 7, illustration of inclination-angle (theta) 1-(theta) 4 is abbreviate | omitted in FIG.

  Further, the top 33 (bottom 36 of the concave emboss 31) of the convex emboss 32 and the bottom 35 (opening of the concave emboss 31) of the convex emboss 32 all have a square shape in plan view (FIGS. 8). Further, the square shape of the top 33 of the convex embossing 32 and the square shape of the bottom 35 of the convex embossing 32 have a similar shape. Thereby, the shape of the convex embossing 32 has a truncated square pyramid. In addition, the shape of the convex embossing 32 is not limited to a truncated square pyramid, You may have shapes, such as a truncated triangular pyramid and a truncated cone.

  On the other hand, the crepe paper 20 has an embossed portion 40 and a non-embossed portion 60, as shown in FIGS. The non-embossed portion 60 is a portion which is surrounded by the embossed portion 40 in the crepe paper 20 and in which the embossed portion 40 is not formed.

  The embossed portion 40 is composed of a concave emboss 41 and a convex emboss 42 corresponding to the concave emboss 41. And multiple concave embossing 41 and convex embossing 42 are formed in the front and back of crepe paper 20 (refer to Drawing 2-Drawing 8). In the present embodiment, the convexes 42 have substantially the same height. In addition, the embossing part 40 is an example of the 2nd embossing formed in the 2nd sheet which comprises the toilet paper of this invention. Moreover, the convex embossing 42 is an example of the 2nd embossing convex part contained in 2nd embossing.

  The concave emboss 41 and the convex emboss 42 of the embossed portion 40 are formed by a conventional embossing method such as a steel rubber method. Specifically, concave embossing 41 is formed on one side of crepe paper 20 by pressing a convex embossing roll (not shown) against crepe paper 20 with the rubber roll, and convex embossing 42 is the other side of crepe paper 20. Is formed corresponding to the concave emboss 41 on the surface of the.

  In the present embodiment, as shown in FIGS. 2 to 8, the side surface 44 of the convex emboss 42 of the crepe paper 20 is directed from the bottom 45 (opening of the concave emboss 41) to the top 43 of the convex emboss 42. Thus, the area of the top 43 of the convex emboss 42 is inclined so as to be smaller than the area of the bottom 45 (the opening of the concave emboss 41) of the convex emboss 42. That is, the convex emboss 42 is tapered from the bottom 45 of the convex emboss 42 toward the top 43 of the convex emboss 42.

  The side surface 44 of the convex embossing 42 is comprised by two side 44A, 44B. In FIG. 3, FIG. 5, FIG. 6, FIG. 8, the two side surfaces 44A, 44B have inclined angles .theta.3 and .theta.4 of the side surfaces 44A, 44B which are substantially the same angle (about 70.degree.). On the other hand, in FIG. 4, the inclination angle θ3 (about 80 °) of the side surface 44A is larger than the inclination angle θ4 (about 60 °) of the side surface 44B. In FIG. 7, the inclination angle θ3 of the side surface 44A (Approximately 60 °) is smaller than the inclination angle θ4 (approximately 80 °) of the side surface 44B.

  Further, the top 43 (bottom 46 of the concave emboss 41) of the convex emboss 42 and the bottom 45 (opening of the concave emboss 41) of the convex emboss 42 both have a square shape in plan view (FIGS. 8). Further, the square shape of the top 43 of the convex emboss 42 and the square shape of the bottom 45 of the convex emboss 42 have a similar shape. Thereby, the shape of the convex embossing 42 has a truncated quadrangular pyramid. In addition, the shape of the convex embossing 42 is not limited to a truncated quadrangular pyramid, You may have shapes, such as a truncated triangular pyramid and a truncated cone.

  In the toilet paper 100 of the present embodiment, the crepe paper 10 in which the embossed portion 30 is formed and the crepe paper 20 in which the embossed portion 40 is formed are overlapped and integrated. Specifically, the crepe paper 10 in which the embossed portion 30 is formed and the crepe paper 20 in which the embossed portion 40 is formed, the formation surface of the convex emboss 32 of the crepe paper 10 and the formation surface of the convex emboss 42 of the crepe paper 20 And are brought together in a nested form.

  In the present embodiment, as shown in FIG. 2 to FIG. 8, between the crepe paper 10 and the crepe paper 20, the convex embossing 32 of the crepe paper 10 is a non-embossed portion 60 of the crepe paper 20 (a convex embossing 42 is provided It is arranged opposite to the part which is not done. On the other hand, the convex emboss 42 of the crepe paper 20 is disposed to face the non-embossed portion 50 (the portion where the convex emboss 32 is not provided) of the crepe paper 10.

  Further, the top 43 of the convex embossing 42 of the crepe paper 20 is bonded to the non-embossed part 50 of the crepe paper 10 by an adhesive (not shown). By bonding the top 43 of the convex embossed portion 42 of the crepe paper 20 and the non-embossed portion 50 of the crepe paper 10, the bonded portion between the two crepe paper 10 and the crepe paper 20 can be made into one crepe paper (crepe paper 10 Can be placed on the side with good balance. Therefore, it is possible to reduce the adhesive portion which is likely to be hardened between the crepe paper 10 and the crepe paper 20, and furthermore, the adhesive portion can be disposed in a dispersed manner.

  In addition, the well-known adhesive agent used for the toilet paper which has a laminated structure can be used for an adhesive agent. As such an adhesive, for example, there is a cellulose-based adhesive such as polyvinyl alcohol, starch, modified starch, carboxymethyl cellulose and the like.

  In the present embodiment, the top 33 of the convex embossing 32 of the crepe paper 10 is not bonded to the non-embossed portion 60 of the crepe paper 20. However, instead of bonding the top 43 of the convex embossed portion 42 of the crepe paper 20 to the non-embossed portion 50 of the crepe paper 10, the top 33 of the convex embossed 32 of the crepe paper 10 is bonded to the non-embossed portion 60 of the crepe paper 20. You may Also, even if the top 33 of the convex embossing 32 of the crepe paper 10 is adhered to the non-embossed portion 60 of the crepe paper 20 and the top 43 of the convex embossing 42 of the crepe paper 20 is adhered to the non-embossed 50 of the crepe paper 10 Good.

  Thus, when the crepe paper 10 in which the embossing part 30 was formed and the crepe paper 20 in which the embossing part 40 was formed are accumulated and integrated, in this embodiment, the side surface 34 of the convex embossing 32 of the crepe paper 10 Since the side surface 44 of the convex embossing 42 of the crepe paper 20 is inclined, the interference between the convex embossing 32 and the convex embossing 42 between the crepe paper 10 and the crepe paper 20 can be prevented.

  Further, since the convex embossing 32 is tapered from the crepe paper 10 toward the top 33 of the convex embossing 32, the bonding area between the convex embossing 32 and the crepe paper 20 can be further reduced. As a result, the adhesion between the crepe paper 10 and the crepe paper 20 can reduce the hardening of the toilet paper 100.

  In the embodiment shown in FIGS. 2 to 8, the embossed portion 30 of the crepe paper 10 and the embossed portion 40 of the crepe paper 20 have the same shape, but the embossed portion 30 of the crepe paper 10 and the crepe paper 20 The emboss portions 40 may be shaped differently.

  In this embodiment, as shown in FIGS. 2-8, the embossing part 30 has two convex embossings 32 from which the inclination angle of the side surface 34 differs. Specifically, as described above, the side surface 34 of the convex emboss 32 has side surfaces 34A and 34B in which each of the inclination angles θ1 and θ2 is about 70 ° in FIGS. 3, 5, 6 and 8. In contrast, in FIG. 4, the side 34A having the inclination angle θ1 of about 80 ° and the side 34B having the inclination angle θ2 of about 60 °, and in FIG. 7 the side 34A having the inclination angle θ1 of about 60 ° and the inclination angle θ2 Have a side 34B of about 80 °.

  In addition, when inclination angles differ, the relationship of FIG. 4, FIG. 7 is also included. That is, convex embossing 32 (see FIG. 4) in which the inclination angle θ1 of the side 34A is about 80 ° and the inclination angle θ2 of the side 34B is about 60 °, and the inclination angle of the side 34B is about 60 °. The relationship with a convex embossment 32 (see FIG. 7) in which θ 2 is about 80 ° is included when the inclination angles in the present invention are different.

  Moreover, in this embodiment, as shown in FIGS. 2-8, the embossing part 40 has two convex embossing 42 from which the inclination angle of the side surface 44 differs. Specifically, as described above, the side surface 44 of the convex emboss 42 has side surfaces 44A and 44B each having an inclination angle of about 70 ° in FIGS. 3, 5, 6 and 8. In FIG. 4, the side surface 44A having the inclination angle θ3 of about 80 ° and the side surface 44B having the inclination angle θ4 of about 60 ° are illustrated. In FIG. 7, the side surface 44A having the inclination angle θ3 of about 60 ° and the inclination angle θ4 of about 80 It has side 44B of °.

  In addition, when inclination angles differ, the relationship of FIG. 4, FIG. 7 is also included. That is, convex embossing 42 (see FIG. 4) in which the inclination angle θ3 of the side surface 44A is about 80 ° and the inclination angle θ4 of the side surface 44B is about 60 °, and the side surface with the inclination angle θ3 of the side surface 44A shown in FIG. The relationship of 44 B with the convex emboss 42 (see FIG. 7) having an inclination angle θ 4 of about 80 ° is included when the inclination angles in the present invention are different.

In this embodiment, the inclination angles of the side surfaces 34 of the two convex embossings 32 included in the embossed portion 30 are different, and the inclination angles of the side surfaces 44 of the two convex embossings 42 included in the embossing portion 40 are different. Non-embossed spaces S _{A to} S _F having different cross-sectional shapes can be configured between 10 and 20 (see FIGS. 2 to 8). Due to the presence of such non-embossed spaces S _{A to} S _F , the volume of the space formed between the crepe papers 10 and 20 can be increased. Therefore, in the present embodiment, the soft toilet paper 100 can be obtained.

  Further, in the present embodiment, since the crepe paper 10 is supported by the plurality of convex embossments 42 and the crepe paper 20 is supported by the plurality of convex embossments 32, strength in the thickness direction of the toilet paper 100 can be increased. Therefore, in the present embodiment, the toilet paper 100 which is not easily crushed can be obtained.

  Further, in the present embodiment, the thickness of the toilet paper 100 in the portion between the crepe papers 10 and 20 in which the two convex embossings 32 having different inclination angles of the side surface 34 and the two convex embossings 42 having different inclination angles of the side surface 44 exist. The force applied in the direction can be absorbed also in the direction in which the convex embossings 32 and 42 are arranged (plane direction orthogonal to the thickness direction). Therefore, in the present embodiment, the soft toilet paper 100 can be obtained.

  Furthermore, in the present embodiment, the plurality of convex embossings 32 includes two convex embossings 32 having different inclination angles of the side surface 34, and the plurality of convex embossings 42 includes two convex embossings 42 having different inclination angles of the side surface 44. ing. Therefore, shading occurs in the concave embossments 31, 41 corresponding to the convex embossments 32, 42 having different inclination angles as described above, so that a visual three-dimensional effect can be obtained. Therefore, in the present embodiment, the toilet paper 100 can be provided with designability or designability.

  Moreover, in this embodiment, as shown in FIGS. 2-8, several convex embossing 32 contained in the embossing part 30 is located in a line on the virtual line L1. In the present specification, the virtual line L1 is a virtual line shown on the toilet paper 100.

  Further, the plurality of convex embossments 32 are arranged such that the inclination angle of the side surface 34 of the convex embossment 32 changes along the imaginary line L1. Here, that the inclination angle of the side surface 34 changes means that the angle at which the side surface 34 of the convex emboss 32 inclines in the direction intersecting the imaginary line L1 changes. When the inclination angle of the side surface 34 changes, the inclination angle of the side surface 34 becomes large, when it becomes smaller, or when it becomes larger or smaller.

  On the other hand, as shown in FIGS. 2-8, the plurality of convex embossments 42 included in the emboss portion 40 are arranged on the imaginary line L2. The virtual line L2 is disposed in parallel to the virtual line L1 in which the plurality of convex embossments 32 are arranged. In the present specification, the virtual line L2 is a virtual line shown on the toilet paper 100.

  Further, the plurality of convex embossments 42 are arranged such that the inclination angle of the side surface 44 of the convex embossment 42 changes along the imaginary line L2. Here, that the inclination angle of the side surface 44 changes means that the angle at which the side surface 44 of the convex emboss 42 inclines in the direction intersecting the imaginary line L2 changes. When the inclination angle of the side surface 44 is changed, the inclination angle of the side surface 44 is increased, decreased, or increased or decreased.

In the present embodiment, the inclination angle of the side surface 34 of the convex embossing 32 changes along the imaginary line L1, and the inclination angle of the side surface 44 of the convex embossing 42 changes along the imaginary line L2 parallel to the imaginary line L1. Thereby, a configuration in which the non-embossed spaces S _{A to} S _F are undulated along the imaginary lines L 1 and L 2 can be formed between the crepe papers 10 and 20 (see FIGS. 2 to 8). Therefore, in the present embodiment, the design provided to the toilet paper 100 can be enhanced while the toilet paper 100 is soft and hard to be crushed.

In the present embodiment, in the plurality of convex embossments 32 of the embossed portion 30, the difference in the inclination angles of the side surfaces 34 is within 20 °. Specifically, the inclination angles θ1 and θ2 of the side surfaces 34A and 34B change in the range of 60 ° to 80 ° (see FIGS. 2 to 8). On the other hand, the difference in the inclination angles of the side surfaces 44 of the plurality of convex embossments 42 of the embossed portion 40 is also within 20 °. Specifically, the inclination angles θ3 and θ4 of the side surfaces 44A and 44B change in the range of 60 ° to 80 ° (see FIGS. 2 to 8).

In the present embodiment, the inclination angle of the side surface 34 of the convex embossment 32 is from the position shown in FIG. 3 (sectional view taken along line AA in FIG. 2) to the position shown in FIG. 4 (sectional view taken along line BB in FIG. 2) Is gradually increased from about 70 ° to 80 °, and gradually decreased from about 70 ° to 60 ° (see FIGS. 2 to 4). ). Further, from the position shown in FIG. 4 (cross-sectional view taken along the line B-B in FIG. 2) to the position shown in FIG. 5 (cross-sectional view taken along the line C-C in FIG. 2), the inclination angle .theta. The angle gradually decreases from 80 ° to 70 °, and the inclination angle θ2 of the side surface 34B gradually increases from about 60 ° to 70 ° (see FIGS. 2 , 4 and 5 ).

Further, in the present embodiment, the inclination angle of the side surface 44 of the convex emboss 42 is shown in FIG. 4 (cross-sectional view taken along the line BB in FIG. 2) from the position shown in FIG. 3 (cross-sectional view taken along the line AA in FIG. 2). Up to the position, the inclination angle θ3 of the side surface 44A of the convex emboss 42 gradually increases from about 70 ° to 80 °, and the inclination angle θ4 of the side surface 44B gradually decreases from about 70 ° to 60 ° (FIGS. 4). Further, from the position shown in FIG. 4 (cross-sectional view taken along the line B-B in FIG. 2) to the position shown in FIG. 5 (cross-sectional view taken along the line C-C in FIG. 2), the inclination angle .theta. The angle gradually decreases from 80 ° to 70 °, and the inclination angle θ 4 of the side surface 44B gradually increases from about 60 ° to 70 ° (see FIGS. 2 , 4 and 5 ).

  In the present embodiment, by setting the difference between the inclination angles of the side surfaces of the convex embossing 32 to 20 ° or less, two convex embossings 32 having different inclination angles of the side surface 34 can be reliably formed in the embossed portion 30. Further, by setting the difference in inclination angle between the side surfaces of the convex emboss 42 to 20 ° or less, two convex embossments 42 having different inclination angles of the side surface 44 can be reliably formed in the embossed portion 40. Thus, in the present embodiment, the designability imparted to the toilet paper 100 can be enhanced while reliably enhancing the softness and the crushing resistance of the toilet paper 100.

  The inclination angle of the side surface 34 of the convex emboss 32 and the inclination angle of the side surface 44 of the convex emboss 42 can both be 60 to 80 °, preferably 63 to 77 °, and more preferably 65 to 75 °. . By setting the inclination angle of the side surfaces 34 and 44 of the convex embossing 32 and 42 to 60 to 80 °, it is ensured that the toilet paper becomes hard due to the bonding part while making the toilet paper 100 soft and hard to be crushed. It can be reduced.

  Further, in the present embodiment, by setting the inclination angle of the side surface 34 of the convex embossing 32 to 60 to 80 °, two convex embossings 32 having different inclination angles of the side surface 34 are more reliably formed on the embossed portion 30. Can. On the other hand, by setting the inclination angle of the side surface 44 of the convex embossment to 60 to 80 °, two convex embossments 42 having different inclination angles of the side surface 44 can be formed more reliably on the embossed portion 40. Therefore, in the present embodiment, the designability imparted to the toilet paper 100 can be enhanced while the softness and crushing resistance of the toilet paper 100 are more surely enhanced.

  In the present embodiment, although the convex emboss 32 of the emboss portion 30 and the convex emboss 42 of the emboss portion 40 are both arranged on the imaginary lines L1 and L2, the present invention is limited to this embodiment. Absent. Therefore, at least one of the convex emboss 32 of the emboss part 30 and the convex emboss 42 of the emboss part 40 may be arranged on the imaginary lines L1 and L2. For example, the convex emboss 32 may be arranged on the virtual line L1, and the convex emboss 42 may not be arranged on the virtual line L2.

  Moreover, in this embodiment, although the embossing part 30 and the embossing part 40 each have several convex embossings 32 and 42 from which the inclination-angle of the side surfaces 34 and 44 changes along virtual lines L1 and L2, in this form, It is not limited. Therefore, the emboss portion 30 and the emboss portion 40 may be those having at least one of a plurality of convex embossments 32, 42 in which the inclination angles of the side surfaces 34, 44 change along the imaginary lines L1, L2. For example, the inclination angle of the side surface 34 of the convex embossing 32 may change along the imaginary line L1, and the inclination angle of the side surface 44 of the convex embossing 42 may not change along the imaginary line L2.

  FIG. 9 is a view showing a crepe paper constituting the sanitary tissue paper (second embodiment) according to the present embodiment. 10 to 15 are a cross-sectional view taken along the line A-A, a cross-sectional view taken along the line B-B, a cross-sectional view taken along the line C-C, a cross-sectional view taken along the line D-D, a cross-sectional view taken along the line E-E, and FIGS. The F line sectional view is shown.

  As shown in FIGS. 9 to 15, in the present embodiment, the virtual line L1 is configured by a curve having a predetermined cycle. The virtual line L2 is also configured by a curve having a predetermined cycle. Such a curve may be at least a part of the imaginary lines L1 and L2. Therefore, all of the imaginary lines L1 and L2 may be configured by such a curve, and a part of the imaginary lines L1 and L2 may be configured by such a curve. Further, such a curve is not limited as long as it has a predetermined cycle. For example, a curve obtained by cutting a portion of a circle may be connected, or a curve having a predetermined amplitude may be used.

In this embodiment, since the virtual line L1 in which the plurality of convex emboss lines 32 are arranged is formed by a curve and the virtual line L2 in which the plurality of convex embossments 42 is arranged is formed by a curve, they are formed along the virtual lines L1 and L2. The undulations of the non-embossed spaces S _{A to} S _F can be increased. In addition, since the curves constituting the imaginary lines L1 and L2 have a predetermined cycle, the plurality of convex embossings 32 and 42 including the two convex embossings 32 and 42 having different inclination angles of the side surfaces 34 and 44 are regularly curved. Can be arranged. Therefore, in the present embodiment, it is possible to further enhance the design provided to the toilet paper 100 while enhancing the softness and the crushing resistance of the toilet paper 100.

  Further, in the present embodiment, a curve having a predetermined cycle that constitutes the imaginary line L1 is a sine wave-shaped curve. In addition, a curve having a predetermined cycle that constitutes the imaginary line L2 is also a sinusoidal curve. In the present specification, a sinusoidal curve means a sinusoidal curve (sine curve) or sinusoid with a constant period (wavelength) and amplitude.

  In the present embodiment, the plurality of convex embossments 32 can be more regularly arranged along the imaginary line L1 by configuring the imaginary line L1 with a curve of a sine wave shape. On the other hand, by forming the virtual line L2 with a curve having a sine wave shape, the plurality of convex embossments 42 can be arranged regularly along the virtual line L2. Thereby, in this embodiment, the designability given to the toilet paper 100 can be further enhanced while enhancing the softness and the crushing resistance of the toilet paper 100.

  In the present embodiment, the imaginary line L1 in which the bumps 32 are arranged and the imaginary line L2 in which the bumps 42 are arranged are curves having a predetermined cycle, but the present invention is not limited to this embodiment. Absent. That is, virtual line L1 in which convex embossing 32 is located in a line, and virtual line L2 in which convex embossing 42 are located in a line should just be a curve in which at least one has a predetermined cycle. For example, virtual line L1 in which convex embossing 32 is located may be constituted by a curve which has a predetermined cycle, and virtual line L2 in which convex embossing 42 is located may be constituted by a straight line.

  Moreover, in this embodiment, although the virtual line L1 in which the convex emboss lines 32 are arranged and the virtual line L2 in which the convex emboss lines 42 are arranged are all formed by a sine wave-shaped curve, the present invention is limited to this embodiment. It is not a thing. That is, virtual line L1 in which convex emboss lines 32 are lined may be constituted by a curve of sine wave shape, and virtual line L2 in which convex emboss lines 42 are lined may be constituted by a curve which has a predetermined period which is not sine wave shape.

  In the toilet paper 100 shown in FIGS. 9 to 15, the virtual line L1 in which the convex embossments 32 are arranged is formed by a curve of a sine wave shape, and the virtual line L2 in which the convex embossments 42 is arranged is formed by a curve of a sine wave shape. As a result, the strength of the toilet paper 100 can be increased, and furthermore, the toilet paper 100 is less likely to be crushed in the thickness direction.

  In addition, when using the roll type toilet paper 100, when the toilet paper 100 is pulled out from the holder (not shown), the embossed portions 30, 40 arranged in a curved shape of a sine wave shape may generate a fluctuation pattern. it can. Therefore, the toilet paper 100 shown in FIG. 9 to FIG. 15 can remind the user of three-dimensional and visual softness, and can exhibit an unconventional design.

  Furthermore, when the crepe paper 10 and the crepe paper 20 are overlapped and integrated so that the emboss parts 30 and 40 are arranged on the imaginary lines L1 and L2 formed of sine wave-shaped curves, a plurality of convex embossments 32, The portion of the convex embossing roll corresponding to the embossed portions 30, 40 in which 42 is arranged and the portion of the rubber roll are not aligned in a straight line. Therefore, the convex embossing roll surface can be prevented from hitting the same position with respect to the rubber roll surface. Therefore, the wear of the convex embossing roll and the rubber roll can be reduced.

  Further, in the toilet paper 100 shown in FIG. 9, when the shape of the curve forming the virtual lines L1 and L2 is a sine wave shape, the period (wavelength) of the sine wave shape is arbitrary, but for example, 50 to 300 mm. Preferably it is 100-280 mm, More preferably, it is 150-250 mm. In addition, in the toilet paper 100 shown in FIG. 9, the period of the sine wave shape of the virtual lines L1 and L2 is included in the range of 50 to 300 mm. If the period of the sine wave shape of the curve which comprises virtual lines L1 and L2 is made into such a range, a plurality of convex embossing 32 and convex embossing 42 can be arranged regularly along virtual lines L1 and L2. Therefore, the design of the toilet paper 100 can be further enhanced while reliably enhancing the softness and the crushing resistance of the toilet paper 100.

  In the toilet paper 100 shown in FIG. 9, when the shapes of the curves forming the virtual lines L1 and L2 have a sine wave shape, the amplitude of the sine wave shape is arbitrary but can be, for example, 10 to 60 mm, Preferably it is 20-50 mm, More preferably, it is 35-45 mm. In addition, in the toilet paper 100 shown in FIG. 9, the amplitude of the sine wave shape of the virtual lines L1 and L2 is included in the range of 10 to 60 mm. When the amplitude of the sine wave shape of the virtual lines L1 and L2 is in such a range, the designability imparted to the toilet paper 100 can be further enhanced while surely enhancing the softness and the crushing resistance of the toilet paper 100. .

Further, in the toilet paper 100 shown in FIGS. 1 to 15, the areas of the top 33 of the convex emboss 32 facing the crepe paper 20 and the top 43 of the convex emboss 42 facing the crepe paper 10 (hereinafter referred to as individual area Or 0.5 to 1.5 mm ² , preferably 0.8 to 1.5 mm ² , and more preferably 1.0 to 1.3 mm ² .

  By setting the individual areas of the convex embossing 32 and the convex embossing 42 in this range, the crepe paper 10 is supported by the convex embossing 42, and the crepe paper 20 is reliably supported by the convex embossing 32, and the convex embossing 32 and the convex embossing 42 becomes more difficult to crush. Therefore, the strength in the thickness direction of the toilet paper 100 can be reliably increased.

  In the toilet paper 100 shown in FIGS. 1 to 15, the area ratio of the top 33 of the convex emboss 32 facing the crepe paper 20 and the top 43 of the convex emboss 42 facing the crepe paper 10 (crepe paper 10 in plan view The ratio of the area of the convex embossing 32 and 42 to 20) is 5 to 10%, preferably 7 to 10%, and more preferably 8 to 10%.

  By setting the area ratio of the top 33 of the convex emboss 32 and the top 43 of the convex emboss 42 in such a range, the space where the convex emboss 32, 42 between the crepe papers 10, 20 does not exist becomes large. Therefore, the non-embossed space formed between the crepe papers 10 and 20 can be increased. Moreover, it can prevent that convex embossing 32 and 42 interfere between crepe papers 10 and 20. FIG. Therefore, the toilet paper 100 is soft and hard to crush. Furthermore, since the bonding area between the convex embossing 32, 42 and the crepe paper 10, 20 can be reduced, it is suppressed that the toilet paper 100 becomes hard (the softness is reduced) by the bonding part of the crepe paper 10, 20. can do.

  Further, in the present embodiment, the heights of the convex embossed portions 32 and 42 can be 1.0 mm to 1.7 mm, preferably 1.1 to 1.5 mm, and more preferably 1.2 to 1.4 mm. Do. The heights of the bumps 32 and 42 are the distances from the bottoms 35 and 45 of the bumps 32 and 42 of the crepe paper 10 and 20 to the tops 33 and 43 of the bumps 32 and 42.

  In this embodiment, the thickness of the toilet paper 100 can be increased while maintaining the strength in the thickness direction of the toilet paper 100 by setting the heights of the convex embossed portions 32 and 42 in such a range. Therefore, the non-embossed space formed between the crepe papers 10 and 20 can be further increased. As a result, the toilet paper 100 becomes softer and less likely to collapse.

Toilet paper 100, 500 gf / cm ² compressive strength under load 5.0gf · cm / cm ² or more conditions are satisfied is preferred. 500 gf / cm ² compressive strength under load, a compression energy when applying a load of 500 gf / cm ² in the thickness direction with respect to toilet paper ^{(gf · cm / cm 2)} . The 500 gf / cm ² load is assumed to be an excess pressure exceeding the pressure assumed when using the toilet paper. By setting the physical properties of the toilet paper to such conditions, the strength of the toilet paper 100 can be reliably increased, and the toilet paper 100 that is not easily crushed can be reliably obtained. Further, 500 gf / cm ² compressive strength under load 5.0gf · cm / cm ² or more toilet paper, tends to be compressed. Therefore, the toilet paper obtained is soft.

Moreover, it is preferable that the toilet paper 100 satisfy | fills the conditions whose compression rate under 50 gf / cm < ² > load is 70% or less. The compression ratio under the 50 gf / cm ² load is based on the thickness (thickness at load) of the toilet paper 100 when the load of 50 gf / cm ² is applied to the toilet paper 100 in the thickness direction, and the initial thickness It is calculated from the following equation. The initial thickness under a 50 gf / cm ² load is the thickness of the toilet paper just before applying a 50 gf / cm ² load to the toilet paper in the thickness direction. Moreover, 50 gf / cm ² load assumes the pressure at the time of use (for example, wiping off) of toilet paper.
· Compression ratio (%) = (initial thickness-thickness at load) / initial thickness × 100
By setting the physical properties of the toilet paper 100 to such conditions, it is possible to reliably obtain a toilet paper that is not easily crushed.

  In the embodiment shown in FIGS. 1-15, crepe paper 10 and crepe paper 20 are integrated in a nested fashion. By adopting such a layered structure of nested type, the strength of the toilet paper 100 can be increased, and furthermore, the toilet paper 100 is unlikely to be crushed in the thickness direction. In addition, with such a configuration, the wiped water can be easily held by the toilet paper 100. Thus, the toilet paper 100 shown in FIGS. 1 to 15 is strong and excellent in water absorption.

  Hereinafter, the present embodiment will be specifically described using examples. The present invention is not limited to these examples. The measurement and evaluation of each example and comparative example were performed as follows.

[Basic weight (base paper)]
The basis weight (rice basis weight) (g / m ² ) of crepe paper (base paper) of the toilet paper 100 used in the test is calculated according to JIS P 8124 (1998).

[Paper thickness (base paper)]
Measure the thickness of the base paper (μm / 1 sheet). The method of measuring the paper thickness is to adjust the humidity of the test piece of the base paper cut into 50 cm x 50 cm under the conditions of JIS P 8111 (1998) sufficiently, and then under the same conditions, dial thickness gauge (thickness measuring device) "PEACOCK G It measures using "type" (made by Ozaki Mfg.). The specific procedure of measurement is to make sure that there is no dirt and dust etc. between the plunger and the measurement table, place the plunger on the measurement table, move the memory of the dial thickness gauge and move the zero point. Match. Then, raise the plunger and place the test piece on the test stand, slowly lower the plunger and read the gauge at that time. At this time, only put the plunger on. The terminal of the plunger is made of metal so that a circular plane with a diameter of 10 mm will be perpendicular to the paper plane. The load at the time of measurement of the paper thickness is about 70 gf at 120 μm. In addition, let the measurement value of paper thickness be an average value obtained by performing measurement 10 times.

[Compression test]
The measuring method of the compression test prepares the test piece (2 sheets piled) which cut | judged to 12 cm x 12 cm, and the compression energy WC at the time of 500 gf / cm ² load using a compression tester (made by Kato Tech. and ^{(gf · cm / cm 2)} , measured 50 gf / cm ² at the time of load the initial thickness _T 0 (mm) and thickness _T m (mm) from 50 gf / cm ² compression rate during load at a load of (%) . Measurement conditions: Pressurizer area: 2 cm ² , Force meter: 1 kg, CHECK switch: MES, DEF output sensitivity dial: 2 mm / V, Upper limit load: (1) 50 gf / cm ² (SENS: 2, STOROKE SET dial: 5 ), (2) 500 gf / cm ² (SENS: 10, STOROKE SET dial: 10), SPEED: 0.02 cm / s (SPEED RANGE switch: 0.1, SPEED SET switch: 2), CONTROL switch: INT, STOP Switch: Turn off.

Here, the compression energy WC is an integral value of the amount of work of compression when compressed to the upper limit load. The initial thickness T ₀ is the thickness of the test piece before the load is applied in the thickness direction, and the thickness T _m under load is the test when the load pressure reaches the upper limit load (50 gf / cm ² ) It is the thickness of the piece. In the measurement, the initial thickness T ₀ and the thickness T _m at the time of loading are measured three times each to calculate an average value. From the calculated initial thickness T ₀ and the thickness T _m at the time of load, the compression rate (crush rate) at the time of load is calculated. The compression rate at the time of loading is calculated by the following equation.
· Compression ratio at load (%) = (Initial thickness T _0- Thickness at load T _m ) / Initial thickness T ₀ × 100
The large compression energy at a load of 500 gf / cm ² indicates that the toilet paper has high strength and is a durable toilet paper. In addition, the large compression energy at a load of 500 gf / cm ² indicates that the toilet paper is easily compressed and is soft. In this case, compression energy at the time of 500gf / cm ² load in the case of 5.0gf · cm / cm ² or more, was evaluated to be a soft toilet paper and durable.

Furthermore, the fact that the compression ratio at 50 gf / cm ² load is low indicates that the toilet paper is unlikely to be crushed in the thickness direction. When the compression rate at 50 gf / cm ² load was 70% or less, it was evaluated that the toilet paper was not easily crushed.

  Examples, comparative examples and reference examples will be described below.

Example 1
In Example 1, a toilet paper in which two sheets of base paper (crepe papers 10 and 20) having a basis weight of 15.3 g / m ² and a paper thickness of 131 μm are superimposed in a nested format as shown in FIGS. Prepared. Moreover, in Example 1, as shown to FIG. 2, FIG. 3, all the embossing parts 30 and 40 were arrange | positioned on linear virtual line L1, L2. Other emboss conditions are the area 1.2 mm ² / piece of the top 33, 43 of the convex emboss 32, 42, the height 1.4 mm of the convex emboss 32, 42, the inclination angle of the side 34, 44 of the convex emboss 32, 42 Is changed in the range of about 60 to 80 °, the shape of the top 33, 43 of the convex emboss 32, 42 is made square, the number of convex emboss 32 (the crepe paper 10 side) 1126/144 cm ² , the number of convex emboss 42 (Crape paper 20 side) 1123 pieces / 144 cm ² , area ratio of tops 33 and 43 of convex emboss 32 and 42 (% bonding area ratio of non-embossed portion 50 of crepe paper 10 and convex emboss 42 of crepe paper 20) 9. 0%, the volume of the convex embossing 32 (crepe paper 10 side) 3113mm ^3, the volume of the convex embossing 42 (crepe paper 20 side) 3117mm ^3, the volume of the non-embossed space Space volume) 13929mm ³ excluding the convex embossing and the area ratio 74.7% of the non-embossed portion. The conditions and results of Example 1 are shown in Table 1.

Example 2
In the second embodiment, as shown in FIGS. 9 to 15, the emboss portions 30 and 40 are disposed on the imaginary lines L1 and L2 formed of sinusoidal curves, and all the imaginary lines L1 and L2 have an amplitude of 40. The same process as in Example 1 was performed except that a curve of a sine wave shape having a cycle (wavelength) of 20 mm was used. The conditions and results of Example 2 are shown in Table 1.

Comparative Example 1
In Comparative Example 1, as shown in FIGS. 16 to 22, a toilet paper 100 was prepared in which two sheets of base paper (crepe papers 10 and 20) were overlapped in a tip to tip format. Moreover, in the comparative example 1, the inclination angle of the convex embossing 32 and 42 was about 70 degrees (constant). Other emboss conditions are the number of convex emboss 32 (crepe paper 10 side) 1156/144 cm ² , the number of convex emboss 42 (crepe paper 20 side) 1156/144 cm ² , the volume of convex emboss 32 (crepe paper 10 side 3883 mm ³ , volume of convex embossing 42 (crepe paper 20 side) 3882 mm ³ , volume of non-embossed space 12395 mm ³ , area ratio of non-embossed portion 68.7%. The conditions other than these were the same as in Example 1. The conditions and results of Comparative Example 1 are shown in Table 1.

[Reference Example 1]
In Reference Example 1, as shown in FIGS. 23 to 29, the inclination angle of the convex embossing 32 and 42 was set to 70 ° (constant). Other emboss conditions are the number of convex emboss 32 (crepe paper 10 side) 1013/144 cm ² , the number of convex emboss 42 (crepe paper 20 side) 10 12/144 cm ² , area ratio of top 33 of convex emboss 32 ( Bonding area ratio of non-embossed portion 50 of crepe paper 10 to convex emboss 42 of crepe paper 20) 8.0% volume of convex emboss 32 (crepe paper 10 side) 3461 mm ³ volume of convex emboss 42 (crepe paper 20 Side) 3461 mm ³ , volume of non-embossed space 13238 mm ³ , area ratio of non-embossed portion 72.1%. The conditions other than these were the same as in Example 1. The conditions and results of Reference Example 1 are shown in Table 1.

[Reference Example 2]
In Reference Example 2, a toilet paper 100 was prepared in which two sheets of base paper (crepe papers 10 and 20) with a basis weight of 15.5 g / m ² and a paper thickness of 133 μm were overlaid in a design laminate format. Other embossing conditions, the area of the top of the convex embossing, front embossing (crepe paper 10) 1.3 mm ² / piece, back embossing (crepe paper 20) 0.3 mm ² / piece, the height of the convex embossing is the surface Embossing (crepe paper 10) 1.4 mm, back embossing (crepe paper 20) 0.5 mm, and the shape of the top of the convex embossing was circular and floral pattern. In Reference Example 2, the area ratio at the top of the convex embossing (the area ratio of the non-embossed portion 50 of the crepe paper 10 to the convex embossing 42 of the crepe paper 20) was 7.1%. The conditions other than these were the same as in Example 1. The conditions and results of Reference Example 2 are shown in Table 1.

表１より、実施例１及び実施例２では、５００ｇｆ／ｃｍ^２荷重時の圧縮エネルギーＷＣが５．０ｇｆ・ｃｍ／ｃｍ^２以上となった。また、５０ｇｆ／ｃｍ^２荷重時の圧縮率が７０％以下となった。

From Table 1, in Example 1 and Example 2, 500 gf / cm ² compression energy WC during loading became 5.0gf · cm / cm ² or more. In addition, the compression ratio at 50 gf / cm ² load was 70% or less.

On the other hand, Comparative Example 1, in Reference Examples 1 and 2, the compression energy at the time of 500 gf / cm ² load was less than 5.0gf · cm / cm ^2. Moreover, in the comparative example 1, the compression rate at 50 gf / cm ² load exceeded 70%.

  From these results, it was found that the conventional tip-to-tip type sanitary thin paper (Comparative Example 1) was hard to compress (sufficient softness could not be obtained) and to be easily crushed. In addition, although it is difficult to crush, it is difficult to be compressed (not enough softness can be obtained), although the hygiene type thin paper of the nested type (reference example 1) and the toilet paper of the conventional design laminate type (reference example 2) understood.

On the other hand, the toilet paper 100 (Examples 1 and 2) in which the inclination angles of the side surfaces 34 and 44 of the convex embossing 32 and 42 are different is high in strength and easy to compress, making the toilet soft and durable. It turned out to be paper. It was also found that these toilet papers 100 (Examples 1 and 2) were resistant to crushing.

  Furthermore, in these toilet paper 100 (Examples 1 and 2), shading occurs in the concave embossments 31, 41 corresponding to the convex embossments 32, 42 in which the inclination angles of the side faces 34, 44 are different. The three-dimensional effect was obtained. Therefore, it was found that the toilet paper 100 (Examples 1 and 2) has an unconventional design.

  Although the preferred embodiments of the present invention have been described above in detail, the present invention is not limited to the specific embodiments, and various changes and modifications may be made within the scope of the invention as set forth in the claims. It is possible.

100 toilet paper 10 crepe paper 20 crepe paper 30 embossed portion 31 the bottom of the concave embossments 32 protruding emboss 33 top 34 side 35 projection embossed (opening of the concave embossments)
36 Concave Embossed Bottom 40 Embossed Part 41 Concave Embossed 42 Concave Embossed 43 Top 44 Side 45 Concave Embossed Bottom (Open Embossed Opening)
46 Concave embossed bottom L1 Virtual line L2 Virtual line S _{A to} S _F non-embossed space

Claims (16)

A first sheet on which a first emboss is formed including a plurality of first emboss protrusions;
And a second sheet having a second emboss formed thereon including a plurality of second emboss protrusions.
A hygienic tissue paper in which the first sheet and the second sheet are stacked and integrated.
The side surface of the first embossed protrusion is the bottom of the first embossed protrusion from the bottom of the first embossed protrusion to the top of the first embossed protrusion, and the area of the top of the first embossed protrusion is the bottom of the first embossed protrusion Inclined to be smaller than the area of the
The side surface of the second embossed convex portion is from the bottom of the second embossed convex portion to the top of the second embossed convex portion, and the area of the top of the second embossed convex portion is the bottom of the second embossed convex portion Inclined to be smaller than the area of the
Wherein at least either of the first embossed and the second embossing, have a two embossing protrusions different inclination angles of the side surfaces,
The plurality of first embossed protrusions are arranged on a first virtual line,
The plurality of second embossed protrusions are arranged on a second virtual line parallel to the first virtual line,
Wherein the first embossing is characterized by have a plurality of embossing protrusions which the inclination angle of the side surfaces varies along the first virtual line, sanitary thin paper. At least one of the plurality of first embossed projections and the plurality of second embossed projections are arranged on a virtual line,
The hygienic tissue paper according to claim 1, wherein at least one of the first emboss and the second emboss has a plurality of emboss protrusions in which the inclination angle of the side changes along the imaginary line . The hygienic tissue paper according to claim 1 , wherein the second emboss has a plurality of emboss convex portions in which the inclination angle of the side changes along the second imaginary line. At least one of the plurality of first embossing protrusions and the plurality of second embossing protrusions, the difference between the inclination angle of each side is within 20 °, according to any one of claims 1 to 3 Hygiene tissue paper. Wherein at least either the plurality of first embossing protrusions of and the plurality of second embossing protrusions, the inclination angle of the side surface of the embossing convex portions are 60-80 °, any one of claims 1 to 4 Hygiene tissue paper described in.   The hygienic tissue paper according to claim 2, wherein at least a part of the imaginary line is a curve having a predetermined cycle. The hygienic tissue paper according to claim 1 or 3 , wherein both the first virtual line and the second virtual line are curves having a predetermined cycle. The sanitary tissue according to claim 6 or 7 , wherein the curve having the predetermined cycle is a sine curve. 9. Hygienic tissue paper according to claim 8 , wherein the period of the sinusoidal shape is 50-300 mm. 10. Hygienic tissue paper according to claim 8 or 9 , wherein the amplitude of the sinusoidal shape is between 10 and 60 mm. The area of the top of the said 1st embossing convex part and at least one of each area of the top of the said 2nd embossing convex part are 0.5-1.5 mm < ² >, Any one of Claim 1 thru | or 10 Hygiene tissue paper described in. The hygiene according to any one of claims 1 to 11 , wherein at least one of the area ratio of the top of the first embossed protrusion and the area ratio of the top of the second embossed protrusion is 5 to 10%. Tissue paper. The sanitary paper according to any one of claims 1 to 12 , wherein at least one of the height of the first embossed convex portion and the height of the second embossed convex portion is 1.0 to 1.7 mm. . 500 gf / cm ² compressive strength under load is 5.0gf · cm / cm ² or more, sanitary thin paper according to any one of claims 1 to 13. 50 gf / cm ² compression ratio under load is 70% or less, the sanitary thin paper according to any one of claims 1 to 14. 16. Hygienic tissue paper according to any of the preceding claims, wherein the first sheet and the second sheet are integrated in a nested manner.

Images