JP4420872B2 - Sheet products - Google Patents

Description

  The present invention relates to sheet products such as kitchen paper rolls, toilet rolls, and tissue papers, and more particularly to sheet products in a form in which base paper sheets subjected to embossing are stacked and a method for manufacturing the same.

Generally, paper sheet products such as tissue paper, toilet paper, kitchen paper, and decorative paper are provided to consumers in a form in which two or more base paper sheets made of pulp or the like are laminated and bonded together. And the main use of these sheet products is to wipe off liquids and the like, and the bulkiness and liquid absorption are particularly required for its quality. For this reason, the base paper sheet of this sheet product is usually embossed to define a space between the base paper sheets bonded together, thereby increasing bulkiness and liquid absorption.
Here, in general, human beings are easily influenced by the visually recognized visual image, and for example, a product with excellent cosmetics can be easily purchased without resistance. For this reason, when embossing is performed, it is common to arrange the embossed convex parts so as to have a predetermined regularity, symmetry, etc. to form a design so as to improve the design. It is. This utilizes a human visual property of recognizing a plurality of embossed convex portions arranged close to each other with regularity and symmetry as a single figure or design (Patent Document 1).
JP-A-2003-116741

Moreover, in patent document 1, embossing convex parts shall be integrated by embossing itself or a glue. However, when adhesive glue is used, the surface becomes hard due to the use of adhesive glue, or when it is rubbed against the skin, such as roughened paper, toilet paper, or tissue paper, it may be highly irritating to the skin. It is necessary to ensure the flexibility of the sheet while avoiding this. Patent Document 1 cannot find such a viewpoint.
Therefore, the main problem of the present invention is to provide a sheet product that is not hard and has little or no roughness due to the adhesive glue on the back surface where the embossing pressure is applied, particularly when the sheets are bonded to each other at the embossed portion. Objective.

The present invention that has solved the above problems is as follows.
<Invention of Claim 1 >
A sheet product in which three base paper sheets having a basis weight per ply of 10 to 25 g / m ² are stacked,
The two base paper sheets are laminated, and a macro emboss having a large area and a deep depth and a micro emboss having a small area and a shallow depth are formed on the laminated sheet, and the other single base paper sheet is formed on the other single base paper sheet. Is formed with micro embossment with a small area and shallow depth,
The single base paper sheet is bonded to the laminated sheet and the adhesive paste applied to the top of the convex portion of the macro emboss,
The sheet product, wherein the adhesive paste amount is 0.001 to 0.1 g / m ² in terms of solid content.

(Function and effect)
There is also a demand for thick sheet products. However, in the invention described in claim 4, in addition to the function and effect described in claim 1, some features are further provided. That is, even though it is three sheets, it can be integrated by forming macro embossing on two base paper sheets in a laminated state, and on the other hand, the one with micro embossing formed on the other base paper sheet is bonded As a result, the entire sheet product can be integrated.
Even if the adhesive paste is applied to the top of the convex portion of the macro emboss, the two base paper sheets in a laminated state are relatively high in rigidity, so that the macro emboss is less likely to lose its shape. As a result, excellent bulkiness and high liquid absorption as a sheet product can be obtained with the formation of macro embossing. Furthermore, since micro embossing is formed on the opposing single base paper sheet, the outer surface of the sheet is excellent in touch. In addition, the macro emboss is not adhered to a flat sheet, and the adhesive paste is adhered to the convex portion of the micro emboss on the top of the convex portion of the macro emboss. Since it does not permeate, the outer surface feels excellent. In addition, since the macro embossing and the micro embossing are opposed to each other and a large gap is formed between them, the effect of obtaining excellent bulkiness and high liquid absorption as a sheet product becomes remarkable. Furthermore, since the two base paper sheets in a laminated state are integrated by forming macro emboss, the integration is not densely laminated as a whole, and a slight gap is partially formed between the base paper sheets. Therefore, it contributes to the improvement of excellent bulkiness and high liquid absorption.

<Invention of Claim 2 >
The adhesive paste is polyvinyl alcohol or carboxymethyl cellulose, the amount of adhesive paste is 0.001 to 0.02 g / m ² in solid content, or is an acrylic resin, and the amount of adhesive paste is 0.00 in solid content. sheet material of claim 1 wherein the 01~0.1g / m ^2.

(Function and effect)
When polyvinyl alcohol or carboxymethyl cellulose is used in the above-mentioned solid content as an adhesive paste, when used for toilet paper, etc., there is no peeling between sheets at the time of use, there is little irritation to the skin, and water disintegration at the time of disposal It will be excellent. In addition, when the acrylic resin is used in the above-mentioned solid content, the amount used is increased because it has no adhesive strength compared to polyvinyl alcohol or carboxymethyl cellulose when used for toilet paper, etc., but the same effect is obtained at the time of use and disposal. Play.

<Invention of Claim 3 >
The sheet product according to claim 1 or 2 , wherein the adhesive paste is polyvinyl alcohol and an acrylic resin, or carboxymethyl cellulose and an acrylic resin.

(Function and effect)
When the polyvinyl alcohol and the acrylic resin are used in combination, or the carboxymethyl cellulose and the acrylic resin are used in combination, the effect of the fifth aspect can be exhibited synergistically.

<Invention of Claim 4 >
The sheet product according to any one of claims 1 to 3 , wherein an area ratio of an embossed convex head portion to which the sheets are bonded is 5 to 20%.

(Function and effect)
When the area ratio of the embossed convex head portion is 5 to 20%, there is no decrease in flexibility associated with the adhesive paste, and the area for necessary adhesion is obtained.

<Other first invention>
A sheet product in which two or more base paper sheets having a basis weight per ply of 10 to 25 g / m ² are stacked,
At least one base paper sheet is embossed, and the base paper sheet and the other base paper sheet are bonded by the adhesive paste applied to the embossed convex top of the base paper sheet to which the emboss is applied,
The sheet product, wherein the adhesive paste amount is 0.001 to 0.1 g / m ² in terms of solid content.
(Function and effect)
In the first invention, since the the base paper sheet and another sheet sheet is bonded by an adhesive glue embossing is applied to the embossed protrusion top portion of the base paper sheet granted, the outer surface of the base paper sheet Since the embossed recess is located and there is no adhesive paste, the outer surface thereof does not irritate the skin or the like. On the other hand, even if the adhesive paste permeates into another base paper sheet, the amount of the adhesive paste is not large, so that the outer surface (other outer surface) is not stimulated and is not rough. . On the other hand, the lower limit value is the amount of adhesive paste for obtaining the required adhesive strength.
The “adhesive paste” includes both a pure adhesive paste when ink is not used and a case where a resin component as an ink vehicle is used as an adhesive component, and may be used in combination. Therefore, it should be noted that the significance includes the adhesive component in any case.
<Other second invention>
A sheet product in which two base paper sheets having a basis weight per ply of 10 to 25 g / m ² are stacked,
Embossing is performed for each base paper sheet, and the base paper sheets are bonded to each other by the adhesive paste applied to the convex top of the emboss,
The sheet product, wherein the adhesive paste amount is 0.001 to 0.1 g / m ² in terms of solid content.
(Function and effect)
The same function and effect as those of the first invention are obtained.
<Other third invention>
The above-mentioned other first or second invention, wherein a plurality of types of embossing having different heights and sizes are applied to a base paper sheet, and adhesive paste is provided only at a large embossing seed portion, and the sheets are bonded to each other Sheet products.
(Function and effect)
In addition to the part to be bonded, a small emboss is also formed, so that the touch, particularly the flexibility, is excellent.
<Other fourth invention>
In manufacturing a sheet product in which two base paper sheets having a basis weight per ply of 10 to 25 g / m ² or two laminated base paper sheets and one base paper sheet are overlaid,
After embossing with one embossing roll on one of the sheets to be overlapped, 0.001 to 0.1 g / m ² of an adhesive paste is applied to the top of the convex portion of the embossing on the one sheet.
Next, a method for producing a sheet product, characterized in that the one sheet and the other sheet are nipped and bonded together by an overlapping roll, and the sheets are bonded to each other by the adhesive paste.
(Function and effect)
The sheet can be obtained by the method of the present invention.
< Other fifth invention >
A method for producing a sheet product according to the above-mentioned fourth invention, wherein the nip clearance is 5 to 200 μm and the nip pressure is 5 to 20 kg / cm.
(Function and effect)
In order to suppress excessive penetration of the adhesive paste into other sheets while preventing the shape of the emboss from being lost, it is necessary to use the nip clearance and nip pressure described above. In each case, the lower limit value is a value required for adhesion.

  According to the present invention, if necessary, it is possible to provide a sheet product which is free from or less rough due to the adhesive paste and is not hard when the sheets are bonded to each other at the embossed portion.

  Embodiments of the present invention will be described below. The sheet product according to the present invention takes a form in which base paper sheets made of at least two sheets of paper or the like are stacked. The number of base paper sheets to be stacked is not particularly limited, and can be appropriately changed to, for example, 2, 3, 4, or more. Two or three sheets are particularly desirable for maintaining the embossed shape.

  In addition, the base paper sheet is a base paper obtained by papermaking a raw pulp in which pulps such as NBKP, LBKP, BCTMP, and waste paper are blended at a ratio corresponding to a target product.

  Furthermore, as the physical properties of the base paper sheet, when the sheet product is toilet paper or tissue paper, the longitudinal strength (MDT) is 75 to 200 gf / 15 mm, the transverse strength (CDT) is 20 to 70 gf / 15 mm, and the longitudinal elongation is (MDS) is preferably 10 to 30% (measurement conforms to JIS P 8113). In addition, in the case of sheet products (paper towels, napkins) that require strength, the longitudinal strength (MDT) of a one-ply paper sheet (base paper) is 200 to 700 gf / 15 mm, and the lateral strength (CDT) is 50 to 200 gf / It is preferably 15 mm and the longitudinal elongation (MDS) is 5 to 30% (measurement conforms to JIS P 8113). When the strength of the base paper is below these lower limits, sheet breakage or the like occurs, and when it exceeds the upper limits, the texture deteriorates. When the elongation of the sheet is less than or equal to these lower limit values, the sheet breaks or the like occurs. When the elongation is greater than or equal to the upper limit value, wrinkles or the like occur in the sheet, resulting in poor operability.

(First embodiment)
Hereinafter, the form of a sheet product in which two base paper sheets are stacked will be described in detail with reference to FIGS. 1 to 3, but is not limited to this form.
In the sheet product X of this embodiment, the two base paper sheets S1 and S2 stacked on each other are provided with micro embossing (first embossing density of 30 to 100 pieces / cm ² and embossing depth of 0.2 to 2.0 mm, for example). 1 emboss) M is given respectively.

  These base paper sheets S1 and S2 face each other, and as shown in FIG. 2, the micro-embossed convex surfaces and the concave surfaces face each other close to each other.

  A design macro emboss (which has a larger area than the micro emboss M and a deep emboss depth) E1 and E2 is formed on a portion of the micro emboss M of the base paper sheets S1 and S2 to form, for example, a design pattern. Are processed in a sparse form, and the design macro embosses E1 and E2 are superimposed on the microembosses M of the base paper sheets S1 and S2. The base paper sheets S1 and S2 are joined at this overlapping portion. Note that FIG. 2 is a diagram for explaining the principle, and in reality, in the design macro emboss E1 and E2 portions, these shapes including the micro emboss M are such that the corners of the illustrated shape are broken. I will add.

  In this embodiment, as shown in FIG. 4, a “flower” pattern emboss E1 is given to the base paper sheet S1, and a “leaf” pattern emboss E2 is given to the base paper sheet S2. The design macro embossing is not particularly limited in size, shape, etc., and logo marks, numbers, characters, geometric patterns, etc. can be selected as appropriate.

  In this way, each of the base paper sheets S1 and S2 is independently subjected to the design macro embossing E1 and E2 processing, and the microembosses face each other, so that the base paper sheets S1 and S2 can be superposed on each other. The bulkiness of S is improved, and the absorbency and softness of the sheet are improved.

  On the other hand, glue G1, G2 colored with a pigment in a color different from the ground color of the sheet product X is given to the convex tops Et of the design macro embosses E1, E2, and the colored glue G1, G2 The two base paper sheets S1 and S2 are bonded together. In this embodiment, a red pigment coloring paste G1 is applied to the convex head top portion Et1 of the floral pattern emboss E1, and a green pigment coloring paste G2 is applied to the convex head top portion Et2 of the petal embossing E2.

  The colored macros G1 and G2 are visually recognized from the front and back surfaces F and B of the sheet product X through the base paper sheets S1 and S2, so that the design macro embosses E1 and E2 are colored. As visible. That is, it is visually recognized as a design in which the embossing of the red floral pattern and the embossing of the green leaf pattern are integrated.

  Here, since the colored paste G1 and G2 are visually recognized from the front and back surfaces of the sheet product X, the design is constituted. Therefore, the colored pastes G1 and G2 are sufficiently clear from the front and back surfaces of the sheet product X. The opacity of the base paper sheets S1 and S2 based on JIS P 8149 is preferably 30 to 80%, and preferably 60 to 70%. With this level of opacity, the color of the colored paste can be clearly recognized from the front and back surfaces of the sheet product.

  On the other hand, as specific examples of the colored pastes G1 and G2, for example, a paste colored with a coloring pigment is used for a paste having PVA (polyvinyl alcohol), CMC (carboxymethylcellulose) or the like as an adhesive component (use of ink) Is also possible).

Here, the coating amount of the colored pastes G1 and G2 for the base paper sheets S1 and S2 is preferably 0.01 to 0.18 g / m ² if the sheet product X is a toilet roll, for example. When it exceeds 0.18 g / m ² , it becomes stiff, and when it is less than 0.01 g / m ² , adhesion between the base paper sheets becomes insufficient. The amount of glue applied can be increased or decreased as appropriate according to the type of sheet product.

  Here, in the present specification, “a color different from the base color of the base paper sheet” means that the hue of the base paper sheet is different, only the saturation and the brightness are different, and the base color of the base paper sheet and the color of the colored paste application portion are gradations. This includes the case where a pattern is formed.

  It is desirable that the L * value of the colored paste-applied portion and the colored paste non-applied portion is 3.0 or more. The L * value can be measured using a measuring device “PF-10” manufactured by Nippon Denshoku Industries Co., Ltd. The measurement is made by placing a base paper sheet having one colored glue application portion on a sheet obtained by stacking 10 or more colored paste non-application base paper sheets so that the colored adhesive application portion is the inner surface. The L * values of the colored paste-applied portion and the colored paste non-applied portion are measured from the surface of the test piece on which the colored paste-applied sheet is placed.

  In manufacturing the sheet product X of the present embodiment described above, for example, it can be performed as follows. From the viewpoint of improving touch, the sheets S1 and S2 are preliminarily subjected to microembossing M processing by a microembossing roll device (not shown) over substantially the entire region of preferably 60% or more, more preferably 90% or more.

  Next, as shown in FIG. 3, the base paper sheets S1 and S2 are made of metal convex embossing rolls 1S and 2S and rubber for providing design macro embossing respectively installed for the base paper sheet S1 and base paper sheet S2. The design macro embossing rolls 1 and 2 are respectively passed through the design macro embossing rolls 1 and 2 configured with a pair of nips with the production restraining rolls 1R and 2R, and the design macro embossing E1 and E2 are applied. In this embodiment, a “flower” pattern is formed on the metal embossing roll 1, a “leaf” pattern is formed on the metal embossing roll 2, an embossing of “flower” pattern on the base paper sheet S1, and a “leaf” pattern on the base paper sheet S2. Design macro embosses E1 and E2 are given respectively.

  After the base paper sheets S1 and S2 pass between the design macro embossing rolls 1 and 2 and are given the embossing E1 and E2, they are separated from the rubber restraining rolls 1R and 2R, and follow the metal convex embossing rolls 1S and 2S. The glue is applied to the embossed convex top portions Et1 and Et2. Glue previously colored with a color pigment is applied by glue units G1 and G2 using a doctor chamber system, and finally transferred and applied by transfer rolls 31 and 32.

  Next, in the overlapping roll 4, the floral pattern emboss E1 of the base paper sheet S1 and the leaf pattern emboss E2 of the base paper sheet S2 do not overlap, and the convex surface of the micro emboss, the floral pattern emboss E1, and the leaf pattern emboss E2 are formed. Both base paper sheets S1, S2 are stacked and bonded so as to face each other.

  Thus, the color of the colored paste G1, G2 is visually recognized from the front and back surfaces F, B of the sheet product X, and the colored paste is colored with the floral pattern emboss E1 colored in red and the leaf pattern embossed E2 colored in green. A sheet product X having an unprecedented cosmetic appearance in which a design with an embossed pattern is formed is manufactured.

  In addition, if the metal embossing roll which has two or more types of embossing patterns from which an embossing depth (it is also height) differs is used, it is possible to give two or more types of embossing from which height differs. In this case, as can be readily seen from the transfer system of FIG. 3, the paste can be applied only to the emboss with a high emboss height, and the embossed convex top of the paste and the emboss without the paste applied. A convex top part can be formed.

  In the above embodiment, the design macro embosses of the base paper sheet S1 and the base paper sheet S2 are different from each other, and the base paper sheets S1, S2 are overlapped so that the design macro embosses E1, E2 do not overlap. As shown in the cross-sectional view of FIG. 1, the sheet embossing E1, E2 of the same design is given to each base paper sheet S1, S2, and the base paper sheets S1, S2 are bonded so that the design macro embossing E1, E2 overlap each other. It may be in the form of product X2.

(Especially toilet paper or tissue paper)
The effect according to the above-described embodiment is particularly effective when applied to toilet paper or tissue paper (including cosmetic paper).
Generally, pattern printing using various color inks may be performed on a base paper sheet as a means applied to a sheet product to improve a visual image. Since this pattern printing can give a color that cannot be obtained only by embossing, it can further contribute to the improvement of the cosmetics and can further enhance the consumer's willingness to purchase.

  However, when manufacturing a sheet product for pattern printing, even if it takes a so-called off-line printing process in which pattern printing is performed on a separate line from embossing, etc., even if it takes a so-called online printing process to be performed on the same line. , Because the pattern printing process was a separate process from the embossing process, inevitably because of the length of the paper sheet compared to the manufacturing process of the sheet product without pattern printing The bulk was reduced. As a result, this has caused a harmful effect of inhibiting the bulkiness of the sheet product.

  On the other hand, when the pattern printing process and the embossing process are separate processes as described above, the printed pattern is likely to be misaligned, and in this case, the cosmetics are rather inferior.

  Therefore, the above manufacturing method is desirable. In other words, coloring of the entire sheet and pattern printing with ink are conventionally known, but when embossing is performed on a pattern-printed base paper sheet, the pattern printing is a separate process or even if pattern printing is performed online. It is practically impossible to link the pattern portion and the embossed portion due to the elongation and error of the pattern. Therefore, since there is no relationship between the pattern portion and the embossed portion, the design portion is inevitably dry.

  On the other hand, according to the above manufacturing method, because the colored paste by the color pigment is given to the design macro embossed part, the uneven part and the coloring are integrated and partitioned from the peripheral region, It will appear as a clear design.

  By the way, in the toilet paper or tissue paper, extreme or excessive coloring is not preferred, but according to the above form, the design macro embossing is integrated with the colored portion, and the design appears. Since it is colored with a pigment, even if it is lightly colored, it can appear as a clear design.

(Second Embodiment)
5 to 7 show a second embodiment in the case of using three base paper sheets.
The second embodiment is a sheet product in which three base paper sheets S3, S4, and S5 having a basis weight per ply of 10 to 25 g / m ² are stacked.

  The two base paper sheets S3 and S4 are laminated at an appropriate stage, and a macro emboss E3 having a large area and a deep depth and a micro emboss E4 having a small area and a shallow depth are formed on the laminated sheet SW. For example, it is formed by pressing with a metal convex embossing roll 51S against the rubber holding roll 51R. The pressing of the metal convex embossing roll 51S is preferably 15 to 30 kg / cm. If the pressure is small, the bulk is difficult to be produced, which leads to the cause of inhibiting the liquid absorption. On the other hand, if it is large, the sheet tends to break at the embossed portion of the sheet.

  On the other single base paper sheet S5, micro embossing having a small area and a shallow depth is formed by pressing the rubber pressing roll 61R with the metal convex embossing roll 61S.

  In addition, the glue unit G3 and the transfer roll 33 are arranged opposite to the metal convex embossing roll 51S, and the glue colored with the colored pigment or the colorless adhesive glue G3 not colored is applied by the doctor chamber method. Then, it is transferred and applied to the top of the convex portion of the micro emboss E4.

  The laminated sheet SW on which the macro embossing E3 is formed is guided between the single base paper sheet S5 and the superposition roll 70 facing the metal convex embossing roll 25S, and the laminated sheet SW and the single base paper sheet S5 are nipped. Are bonded by the adhesive paste G3. After that, after being wound around a long paper tube, it is made into a toilet paper roll having a narrow width, or led to an inter-holder to be made into a sheet product such as tissue paper.

  Here, it is desirable that the nip clearance between the overlapping rolls 70 facing the metal convex embossing roll 51S is 5 to 200 μm, and the nip pressure is 5 to 20 kg / cm. If the clearance and the nip pressure are small, the adhesiveness is poor. If the clearance and the nip pressure are large, the emboss is deformed, and excessive penetration of the adhesive paste into other sheets increases, resulting in roughness.

  Although formation of the macro embossing E3 and the micro embossing E4 in 2nd Embodiment can be selected suitably, the example shows in FIG. The example of FIG. 5 is an example in which a macro emboss E3 is formed in the curve of the inter-defect and the petal portion, and a micro emboss E4 is formed in a region surrounded by the curve of the inter-defect. Therefore, although the macro emboss is not superimposed on the micro emboss as in the first embodiment, it may be superimposed. The design is not basically limited in the present invention.

  The second embodiment is suitable as a toilet paper roll, and the outer surface side of the roll is a laminated sheet SW and the inner surface side is a single base paper sheet S5, which is suitable for impressing consumers with bulkiness. ing.

(Other matters)
In the embodiment of the present invention, the amount of adhesive paste is required to be 0.001 to 0.1 g / m ² in terms of solid content. If the amount of adhesive paste is small, the adhesiveness is poor, and if it is excessively large, it becomes rough. The adhesive paste is polyvinyl alcohol or carboxymethyl cellulose, the amount of adhesive paste is 0.001 to 0.02 g / m ² in terms of solid content, or is an acrylic resin, and the amount of adhesive paste is 0.01 in terms of solid content. It is desirable that it is ˜0.1 g / m ² . In particular, in the case of an acrylic resin, when a coloring ink is used, a resin component as a vehicle contained in the ink can be used as an adhesive component, or polyvinyl alcohol or carboxymethyl cellulose or another acrylic resin is used in combination. May be.

Toilet paper or tissue paper is preferably a 2-ply or 3-ply product, and the basis weight according to JIS P8124 of 1 ply is preferably 10 to 25 g / m ² . The reason why the lower limit is defined as 10 g / m ² is that if it is less than 10 g / m ² , it is preferable from the viewpoint of improving softness, but the strength cannot be ensured properly. Further, the upper limit was defined as 25 g / m ^2, when greater than 25 g / m ^2, too hard, because the feel is deteriorated.

The microembossing desirably has an embossing depth of 0.2 to 2.0 mm at an embossing density of 30 to 100 pieces / cm ² . The size of the top is preferably 0.5 to 2.0 mm in terms of diameter.

  As the macro embossing, the size of the top is preferably 1.0 to 4.0 mm in terms of diameter. The area ratio of the top of the convex portion of the macro emboss is 3 to 20%, and particularly 4 to 13% is desirable in order to ensure adhesiveness in a range that does not impair the touch.

  The macro embossing is desirably bonded evenly over the entire sheet with an area ratio of 3 to 20% with respect to the micro embossing. For example, a non-adhesive zone can be partially formed between the perforations of the toilet paper roll. is there.

  The peel strength [CN] between the sheets adhered by the adhesive paste is preferably 5 to 40. The reason why the lower limit is defined as 5CN is that when the lower limit is less than 5CN, the base paper sheets S1 and S2 cannot be properly bonded to each other. Moreover, the reason why the upper limit is defined as 40 CN is that when it exceeds 40 CN, it becomes too hard as a sanitary thin paper, and the touch becomes worse. The peel strength is measured, for example, by cutting the sample into 50 mm squares, peeling off a predetermined length, and then using a peel test load cell (TG200N, manufactured by Minebea) in a direction substantially perpendicular to the front and back surfaces of the sample. The film is peeled by pulling at a speed of 300 mm / min, and the strength at that time is measured.

  The base paper sheet may be colored, for example, in light pink or blue, or may be one in which the color of the uncolored pulp itself appears. The color of the colored paste is not limited.

  It should be noted here that water and alcohol solvents in the colored paste do not need to be taken into consideration, but PVA (polyvinyl alcohol), CMC (carboxymethylcellulose Na salt), etc. in the colored paste are bonded. It is the ratio of the component and the pigment. The color pigment / adhesive component (weight ratio) is preferably 0.1 to 8, particularly 0.5 to 4. If the weight ratio is small, coloring is mottled in the design macro-embossed portion, the design is difficult to appear sharply (clearly), and if the weight ratio is excessively large, the adhesiveness is deteriorated, and the peel strength condition It will be difficult to satisfy. The viscosity of the colored paste is preferably 1 to 30 mpa, particularly 2 to 15 mpa.

Next, examples and comparative examples of the present invention will be described.
A 2-ply or 3-ply sheet product was obtained using a base paper sheet made by adding cationic starch and a wet paper strength agent to pulp fibers. This example is an example for obtaining a toilet paper roll.

  By the difference in conditions, the adhesive strength between sheets (evaluated by the peel strength between plies) and the roughness of the outer surface of the sheet facing the embossed convex head top were evaluated. The results are shown in Table 1.

  The embossing pressure for forming the macro embossing is 23 kg / cm, the superposition roll marriage pressure (nip pressure) is 10 kg / cm, and the marriage stopper is 1/100 mm, all under the same conditions. The example of 3 plies in the table is manufactured in the same form as the example described in the second embodiment, and the example of 2 plies is not a laminated sheet SW but a single layer sheet is used. It is manufactured in the same form as the example described in the second embodiment. The adhesion area ratio means the area ratio of the top of the convex portion of the macro emboss. In all examples, the water disintegration property was about 20 seconds, which was a value sufficient for practical use. It is also excellent in dry tensile strength and wet tensile strength. Moreover, it discovered that the thing of the Example of Table 1 can be used conveniently also in tissue paper.

  As for the rough surface on the back, ◎: I feel no rough at all for 50 people. ○: It feels somewhat rough, but there is no problem in use. Δ: Feels rough, but can be used. X: It is too rough and cannot be used. We had you evaluate in four steps.

  In the table, MMD is smoothness expressed by the average deviation of the coefficient of friction in the surface characteristics using a KES tester. Specifically, this surface characteristics test was conducted by “Friction” manufactured by Kato Tech Co., Ltd. Sensitive tester KES SE "can be used. In the measurement, a tension force of 20 g / cm in the moving direction was made while a friction piece consisting of a piano wire having a cross-sectional diameter of 0.5 mm and a contact surface length of 5 mm was brought into contact with a paper sample with a contact pressure of 10 g. Is applied to a paper sample, and the coefficient of friction is measured when moved 2 cm at a speed of 0.1 cm / sec. That is, the average deviation MMD of the friction coefficient is a value obtained by dividing the area of the variation amount of the surface thickness when the friction element is moved by the movement distance (2 cm). Here, this MMD corresponds to smoothness. The smaller the value, the smoother.

  Table 1 shows an example in which CMC and ink are used together and an example in which only ink is used. An example in which the same amount of PVA was used instead of CMC was also tested. Similar evaluations were made.

  The present invention is not limited to the above embodiment, and various improvements and design changes can be made. In addition to toilet rolls made by stacking two or more base paper sheets such as thin paper, it can be used for kitchen paper, tissue paper, makeup wipes, and the like.

It is a front view of the sheet product concerning this invention. It is sectional drawing of the sheet | seat product concerning this invention. It is the schematic which shows the manufacturing process of the sheet product concerning this invention. It is an exploded view of the sheet product concerning this invention. It is a front view of the other sheet product concerning a 2nd embodiment. It is the schematic which shows the manufacturing process of the sheet product concerning 2nd Embodiment. It is the schematic which shows the manufacturing process of the sheet product concerning 2nd Embodiment. It is sectional drawing of the other sheet | seat product concerning this invention.

  1S, 2S ... Metal embossing roll, 1R, 2R ... Rubber presser roll, 4 ... Overlap roll, 51R, 61R ... Rubber hold-down roll, 51S, 61R ... Metal convex emboss roll, 70 ... Overlap roll, S1-S5 ... base paper sheet, SW ... laminated sheet, E1, E2 ... design macro emboss, E3 ... macro emboss, E4 ... micro emboss, G1, G2, G3 ... adhesive glue, M ... micro emboss, X ... sheet product, F ... sheet product B: The back side of the sheet product.

Claims (4)

A sheet product in which three base paper sheets having a basis weight per ply of 10 to 25 g / m ² are stacked,
The two base paper sheets are laminated, and a macro emboss having a large area and a deep depth and a micro emboss having a small area and a shallow depth are formed on the laminated sheet, and the other single base paper sheet is formed on the other single base paper sheet. Is formed with micro embossment with a small area and shallow depth,
The single base paper sheet is bonded to the laminated sheet and the adhesive paste applied to the top of the convex portion of the macro emboss,
The sheet product, wherein the adhesive paste amount is 0.001 to 0.1 g / m ² in terms of solid content. The adhesive paste is polyvinyl alcohol or carboxymethyl cellulose, the amount of adhesive paste is 0.001 to 0.02 g / m ² in solid content, or is an acrylic resin, and the amount of adhesive paste is 0.00 in solid content. sheet material of claim 1 wherein the 01~0.1g / m ^2.   The sheet product according to claim 1 or 2, wherein the adhesive paste is polyvinyl alcohol and an acrylic resin, or carboxymethyl cellulose and an acrylic resin.   The sheet product according to any one of claims 1 to 3, wherein an area ratio of an embossed convex head portion to which the sheets are bonded is 5 to 20%.

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