JP2001286414A - Tissue paper products stored in a box - Google Patents

Abstract

(57) [Summary] [Problem] Without impairing the quality of tissue paper,
An object of the present invention is to obtain a compact boxed tissue in which the height of a storage box per storage number is suppressed. SOLUTION: In a tissue paper product in which a plurality of tissue papers are folded in a so-called pop-up system as a set of two tissue papers and stored in a substantially rectangular box, a ratio of an inner height dimension of the box to the number of stored tissue papers. Is 40/400 to 60/400 mm / sheet, and the thickness specified by JISP 8118 per sheet of tissue paper (provided that the test conditions are a temperature of 20 ± 2 ° C. and a humidity of 65 ± 2%). 030-0.043 mm, and JIS S per two sets of tissue paper
When the tensile strength specified in 3104 is dry, it is 0.
6 to 2.0 N / 25 mm, JIS S 3104
A tissue paper product stored in a box, wherein the water absorption specified in (1) is 8 seconds or less.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tissue paper product stored and traded in a paper box made of paperboard, for example, and more particularly, to a predetermined number of tissue papers stored in a box. The present invention relates to a tissue paper product that is made compact by reducing the height.

[0002]

2. Description of the Related Art Tissue paper products in which a plurality of tissue papers are folded and stored in a substantially rectangular box,
As standardized in JIS S 3104, generally 400 tissue papers per box,
Many products containing 200 sets in pairs are sold. Further, as a box for storing such tissue paper, the outer dimensions of the box are initially 250 mm (length) × 12 mm.
Paper boxes having a size of about 0 mm (horizontal) x 110 mm (height) were generally distributed, but due to compactness, paper boxes having a box height of about 65 mm have become mainstream at present.

[0003] Japanese Patent Application Laid-Open Nos. Hei 9-140624 and Hei 10-1794 disclose such attempts to reduce the size.
No. 41 discloses such technical means. In the former, the compressed polymer obtained by crushing the conventional boxed tissue paper and compressing it to half the height (thickness) was stored in a box half the height of the previous box,
A technique relating to the compression device is disclosed. However, the technique disclosed in this publication merely crushes a bundle of conventional tissue papers after making the paper to reduce the thickness, so that the water absorption required for the tissue paper, softness, touch, and taking out of the tissue. It is expected that important qualities such as ease will be impaired.

Japanese Patent Laid-Open Publication No. Hei 10-179441 discloses a technique for achieving a compact tissue paper in a box without impairing the quality required for the tissue paper. Is
The purpose of the invention is to increase the density of tissue paper to achieve compactness, and specifically disclosed in the embodiment is a boxed tissue paper having 400 sheets and a box height of 65 mm. However, it is possible to increase the density of the tissue paper to achieve compactness. However, if the density is too high, there will be problems in quality and manufacturing technology. Restrictions arise. Therefore, in order to achieve further downsizing while maintaining the quality, a further advanced technology has been required.

[0005]

SUMMARY OF THE INVENTION The present invention relates to a tissue paper product stored in a box, which further reduces the height of the box with respect to a predetermined number of stored sheets, thereby further increasing the compactness. It is an object to improve the convenience of the system. In addition, even when the thickness of the tissue and the paper bundle is reduced by making it compact, the quality such as the strength, water absorption, softness, touch, ease of taking out the tissue paper, etc. It is an object to achieve compactness while maintaining the range. In addition, the conventional 4
An object of the present invention is to further reduce the size of a compact tissue paper product stored in a box of about 65 mm in height containing 00 sheets.

[0006]

According to the first aspect of the present invention, there is provided:
In the present invention, a plurality of tissue papers are folded into one set and folded in a so-called pop-up system (a single diffraction is performed, and the upper and lower tissues are overlapped, and one set of tissues is taken out). Later, when the next tissue comes out of the outlet, it is folded so that it can be taken out continuously). Then, in the tissue paper product stored in the box of a substantially rectangular parallelepiped, the box The ratio of the height dimension (the inner dimension of the box) is 40/400 to 60/400 mm / sheet (i.e., 0.10 to 0.15 mm / sheet), and JIS P 8118 per one tissue paper (however, The test conditions are a temperature of 20 ± 2 ° C. and a humidity of 65 ± 2%.) The thickness of the tee stored in a box is 0.030 to 0.043 mm. It is a paper product.

The first aspect of the present invention relates to a tissue
Box height relative to the number of papers (strictly speaking, the height inside the box)
Tissue stored in a box without reducing the ratio of conventional products
It is a compact version of a paper product. In addition,
Number of tissue papers to be stored and box height for this
The height (strictly speaking, the height inside the box)
When the thickness of the menu is determined, the thickness of all tissue bundles is determined.
Naturally, the height of the extra space held inside the box (the height inside the box
1.18 × 10 within 3 minutes after packing ⁴Pa's
Subtract the thickness of all tissue bundles measured under pressure
Size) and its ratio, that is,
The margin is also determined, and almost all the dimensional relationships in the height direction are determined,
These values are all specified. The present invention
Reduce the thickness of the tissue paper to reduce the thickness of the bundle
At the same time, the height of the extra space at the top of the box is also reduced, and the height of the box
The feature is that it is lowered.

The first invention defines the ratio of the height of the box to the number of stored tissue papers, which limits the number of tissue papers and the height of the box itself. Of course not. Also,
When the box is made of paper, the inside height of the box is measured between ruled lines provided to bend the height of the box (or between the center lines when two are provided at the bending positions) (ruled line). Dimension) can be determined by subtracting the thickness dimension of one sheet of paper forming the box from (Dimension). Further, the dimensional relationship as defined in the first invention makes it possible to maintain the quality conditions as described below.

A second aspect of the present invention is that, in the tissue paper product housed in the box, the tensile strength specified by JIS S 3104 per pair of two tissue papers is set to 0.6 in a horizontal condition when dry under dry conditions. The tissue paper product stored in the box according to the first aspect of the present invention, which has a water absorption of up to 2.0 N / 25 mm and a water absorption specified by JIS S 3104 of 8 seconds or less.

According to the second invention, in order to reduce the thickness of the tissue paper by increasing the density of the tissue paper or decreasing the basis weight in order to make the storage box compact, the tensile strength required for the tissue paper is reduced. Since extremely important qualities for tissues such as pods and water absorption tend to deteriorate, these extremely important quality conditions can be maintained within a predetermined range conventionally required for tissue paper. Therefore, the typical quality conditions are specified. Further, in the invention relating to the lower claims, the disclosure of those solutions is also made, and the relationship between the height of the tissue bundle and the height of the box, and the density, basis weight, quality range, etc. of the tissue paper are described in the claims. It is specified as follows.

A third aspect of the present invention is that, in the tissue paper product stored in the box, JIS P 8118 per tissue paper (provided that the test condition is a temperature of 2
0 ± 2 ° C, humidity 65 ± 2%)
0 to 0.040 mm, and the basis weight defined by JIS S 3104 per tissue paper is 10.0.
１３13.0 g / m ² , JIS P of the tissue paper
8118 (however, the test conditions are a temperature of 20 ± 2 ° C. and a humidity of 65 ± 2%) when the density is 0.29 to 0.37 g /
A tissue paper product stored in a box according to the first or second invention, characterized in that the tissue paper product is cm ³ .

The third aspect of the present invention defines a more preferable range of the thickness of the tissue as defined in the first aspect of the invention, and achieves this thickness while maintaining the quality in a predetermined range. It defines the values of basis weight and density.
In order to reduce the thickness of the tissue, the density of the tissue itself is increased, and the basis weight is also reduced.The quality condition, which is extremely important for tissue paper, such as tensile strength and water absorption, is also known. It is maintained at a predetermined value that is not inferior in quality.

Further, in the first to third inventions,
Decreasing the basis weight of the tissue paper to reduce its thickness will decrease the tensile strength.In order to keep the strength from decreasing, increase the degree of beating in the stock preparation process or use the appropriate type of wood for pulp. The strength can be maintained at a predetermined level, for example, by selecting the above. Further, although the water absorption depends on the pulp raw material and the like, it is possible to maintain the quality condition in a predetermined range mainly by not increasing the density too much. Furthermore, if the densification of the tissue in the present invention is achieved not only by means such as calendering which has been conventionally performed, but also by means of appropriate selection of raw materials and adjustment of the crepe ratio, a feeling of touch can be obtained. There is no loss.

A fourth aspect of the present invention is that, on the upper surface of the box,
When the length in the longitudinal direction of the outlet arranged along the long side of the rectangle is expressed as a ratio to the long side length of the upper surface of the box, 7
A tissue paper product stored in the box according to any one of the first to third inventions, wherein the tissue paper product is 2 to 96%.

A fifth aspect of the present invention is characterized in that, when the maximum length in the lateral direction of the outlet is expressed as a ratio to the length of the outlet in the longitudinal direction, it is 17 to 24%. 4th
A tissue paper product stored in the box described in any one of the above inventions.

According to the fourth and fifth aspects of the present invention, when the height of the extra space at the top of the box is also reduced to lower the height of the box, it is difficult to take out the tissue when taking out the tissue. In order to solve the above problem, the length of the outlet in the longitudinal direction is made longer than that of the conventional product, and the length of the outlet in the short direction (width direction) is appropriately set.

According to a sixth aspect of the present invention, when the area of the outlet arranged on the upper surface of the box is represented by a ratio to the total area of the upper surface,
A tissue paper product stored in a box according to any one of the first to fifth inventions, wherein the tissue paper product is 23 to 32%. As in the fourth and fifth inventions, the sixth invention is also a measure against the problem that the height of the extra space at the upper part of the box becomes small and it becomes difficult to take out the tissue.

A seventh aspect of the present invention is that a film having a slit for taking out a tissue is attached so as to cover an outlet provided inside the upper surface of the box, and is disposed in a longitudinal direction of a box formed at a central portion of the outlet. When the determined slit length is expressed as a ratio to the length of the long side of the upper surface of the box, it is 66 to 96%, and is stored in the box according to any one of the first to sixth inventions. This is a tissue paper product. As described above, in the present invention, when the height of the box is reduced by reducing the extra space at the top of the box, it becomes difficult to take out the tissue when taking out the tissue. Is lengthened to solve the above problem.

In an eighth aspect of the present invention, the bulk density (mass of tissue paper / volume in the box) based on the box volume is 0.13 to 0.1.
A tissue paper product stored in a box according to any one of the first to seventh inventions, wherein the tissue paper product is 17 g / cm ³ . According to the eighth aspect of the present invention, the box for storing the tissue paper has a dimensional margin not only in the vertical direction of the box but also in the longitudinal direction of the box. The invention is defined as a bulk density based on a box volume. When the bulk density is smaller than the above range, it is difficult to reduce the size. On the other hand, when the bulk density is larger than the above range, it is difficult to maintain the quality of the tissue paper, such as the feel to touch and the degree of water absorption, and to remove it from the storage box.

According to a ninth aspect of the present invention, a bundle of all the tissue papers stored in the box is taken out after being stored in the box, and is pressurized at a pressure of 1.18 × 10 ⁴ Pa within 3 minutes after being stored in the box. When the height of the bundle when measured is expressed as a ratio to the height of the box, it is 62 to 76%,
A tissue paper product stored in the box described in any one of the above inventions. According to the ninth invention, a numerical value relating to a vertical dimensional margin of a box is defined.
When the ratio is obtained by subtracting the ratio of the bundle height from%, the ratio of the extra height (the extra space) is obtained. If this value is too small, it is difficult to take out the tissue paper at the beginning of use of the tissue paper, and troubles such as a plurality of tissue papers coming out of a set rather than one set tend to occur. The numerical values specified in the present invention are the basis weight and density of the tissue specified in the first and third aspects,
When the number of tissues, the height in the box, and the ratio are determined, the numbers are determined in correspondence with these numbers.

According to a tenth aspect of the present invention, the crepe of the tissue paper stored in the box is provided by a difference between a peripheral speed of a dryer part and a peripheral speed of a winding part in a paper machine, and is defined by the following formula. The rate is 18-2
A tissue paper product stored in a box according to any one of the first to ninth aspects, wherein the tissue paper product is 5%. Crepe rate = 100 × (Dryer peripheral speed-winding section peripheral speed) / winding section peripheral speed In the tenth invention, the amount of wrinkles of the tissue paper, which is influenced by the crepe rate, is set to a lower predetermined range. By doing so, the purpose is to reduce the thickness of the tissue paper. In general, when the crepe rate is lowered, the elongation of the paper is reduced, and the operability in the winding section of the paper machine and the ply machine (a machine for making two-ply tissue) becomes a problem.
In the present invention, the paper is softened by blending the raw material pulp or the like, thereby increasing the elongation of the paper, thereby addressing this problem.

An eleventh aspect of the present invention is directed to the first to tenth aspects of the invention, wherein the average courseness of the raw pulp for making the tissue paper stored in the box is in the range of 7 to 14 mg / 100 m. A tissue paper product stored in any of the boxes described above. Here, the coarseness of the raw pulp is TAPPI T234hm-84.
Measure according to the method specified in When the tissue paper is composed of a plurality of raw pulp due to multi-layering or the like, the average course of the raw pulp is calculated by the following equation. That is, when the tissue paper is produced from the raw materials of pulp A, pulp B,... Pulp N, the course of pulp A is Xa (mg / 100 m),
The mixing ratio is Wa mass%, and the pulp B courseness is X.
b (mg / 100m), the compounding ratio is Wb mass%,
..Coarseness of pulp N is Xn (mg / 100m),
When the compounding ratio is Wn mass%, the average coarseness X (mg / 100m) can be obtained by the following equation. 100 / X = Wa / Xa + Wb / Xb +... + Wn /
Xn, where 100 = Wa + Wb +... + Wn

The courseness of the raw pulp is the mass per 100 m of each fiber constituting the raw pulp,
Low-course fibers are generally soft, and if the basis weight is the same, the number of fibers increases when the low-course is low, so that the surface texture is improved, and an excellent feel and a high opaque tissue paper can be obtained. There is. According to the eleventh invention, by using a large amount of raw pulp having a low coarseness and setting the average coarseness of the fibers in the raw pulp to a lower value than before, it is possible to reduce the quality reduction due to a decrease in basis weight and an increase in density. It has been found that it can be prevented.

In a twelfth aspect of the present invention, when the ratio of dry pulp to slush pulp in the raw pulp for making the tissue paper is expressed as a ratio of dry pulp to the total amount of the raw pulp, it is 40% by mass or more. A tissue paper product stored in a box according to any one of the first to eleventh aspects of the present invention. According to the twelfth aspect, when the density of the tissue paper is increased and reduced, the tissue paper becomes hard and loses its softness.
Further, the feel of the hand tends to deteriorate, and in order to maintain these quality conditions, it is characterized in that the proportion of dry pulp that is effective in improving softness and feel is specified. The dry pulp is a pulp produced through a digestion, a washing and a bleaching process, is not supplied to a tissue paper machine as it is, but is once made by a pulp machine to dry the pulp. When the pulp is dried, the cells that make up the fibers are crushed, and when the pulp is further dried, the cell wall becomes thinner, resulting in a so-called "withered state." When dry pulp is used as a raw material for tissue paper, a tissue that is soft and has a soft touch Paper can be manufactured.

[0025]

BEST MODE FOR CARRYING OUT THE INVENTION A tissue paper product stored in a box according to the present invention is a product in which a plurality of tissue papers are folded and stored as a set of two in a substantially rectangular parallelepiped box. The ratio of the size (the inner size of the box) is 40/400 to 60/400 mm / sheet. That is, it is 0.10 to 0.15 mm / sheet. By making it 60/400 mm / sheet or less,
It is more compact than conventional tissue paper, improving the convenience of carrying around for consumers, storage of distributors, and logistics. From the viewpoint of compactness, the smaller the value, the better. However, if the value is smaller than 40/400 mm / sheet, the qualities such as the tensile strength, water absorption, and ease of taking out the tissue required for the tissue paper are maintained. Therefore, the lower limit was set to 40/400 mm / sheet. In addition, this ratio is preferably 43/400 to 54.
/ 400 mm / sheet, and when it is 43 mm / 400 sheets or more, the quality required for the tissue paper is more easily maintained and the production is easier. Needless to say, it is more compact and preferable if the thickness is 54 mm / 400 sheets or less.

JIS P 811 per tissue paper of tissue paper products stored in the box of the present invention
8 (However, the test conditions are as follows: temperature 20 ± 2 ° C, humidity 65 ± 2
%) Is preferably set to 0.030 to 0.043 mm. When the thickness is set to 0.043 mm or less, while maintaining qualities such as tensile strength, water absorption, and ease of taking out a tissue at a predetermined value, The ratio of the height dimension of the box (the inner dimension of the box) to the number of tissue papers can be kept within the above-mentioned predetermined value. However, when the thickness is less than 0.030 mm, the water absorption degree, the softness of the tissue (touch feeling, etc.), It is not preferable in terms of manufacturing technology, tensile strength and the like. In addition, as a result of testing the ease of taking out the tissue paper with a box having a height of the storage box (inner dimension) of 50 mm, as shown in Table 1 below, the thickness of the tissue paper was 0.040 mm.
Since the thickness is preferably not more than
More preferably, it is 30 to 0.040 mm.

The tensile strength defined by JIS S 3104 per pair of two tissue papers of the present invention is 0.6 to 2.0 N / 25 mm in the horizontal condition when dry, and the lower limit is 0. 0.6 N / 25 mm is the lower limit of the strength required for general use of the tissue, and the upper limit is a value expected to be no longer necessary for general use. Further, the water absorption specified in JIS S 3104 is 8 seconds or less. This value is also the quality required for general tissue paper. That is, it means that the quality of the tissue paper of the present invention is maintained even if the tissue paper is thinned by increasing the density and reducing the basis weight to make it compact. The tensile strength is more preferably 0.78 to 2.0 N / 25 mm in the horizontal condition when dried. In view of the strength, the tensile strength is more preferable. It also conforms to the numerical range defined in the quality standard of No. 1, and is more preferable.

Further, the JIS S per tissue paper of the tissue paper product stored in the box of the present invention.
The basis weight specified in 3104 is 10.0 to 13.0 g / m.
² is preferable, and by setting the content in this range,
It is possible to keep the ratio of the height of the box (the inner size of the box) to the number of the tissue papers within the predetermined value while maintaining qualities such as tensile strength, water absorption, and ease of taking out the tissue at a predetermined value. . It should be noted that reducing the grammage is preferable for reducing the paper thickness because the paper thickness can be reduced. However, if the grammage is too small, it is difficult to keep the quality at a predetermined value, and furthermore, the paper is liable to be cut off during papermaking. Since a technical problem arises, the lower limit of the grammage is naturally limited, and the lower limit is preferably set to 10 g / m ² .

Incidentally, JIS P 8 of tissue paper in the tissue paper product stored in the box of the present invention.
118 (however, the test conditions are temperature 20 ± 2 ° C, humidity 65
± 2%) is 0.29 to 0.37 g / cm
³ , and by setting it to 0.29 g / cm ³ or more, the height of the box with respect to the number of tissue papers (the inner size of the box) while maintaining the quality such as the tensile strength and the water absorption at a predetermined value. ) Can be kept within the predetermined value. On the other hand, if it is higher than 0.37 g / cm ³ , it is not preferable in terms of water absorbency, softness of tissue (feeling to the touch) and the like.

Next, the form of the tissue paper storage box according to the present invention will be specifically described. FIG. 1 is a perspective view showing an example of a storage box of a tissue wrapper stored in a box of the present invention. An elongated outlet 2 is formed on the upper surface of a rectangular parallelepiped paper box 1. FIG. 2 is a sectional view schematically showing tissue paper stored in a pop-up system. FIG. 3 is a view showing the upper surface of the storage box. A slit 4 which also functions to hold the next tissue paper after taking out the tissue paper is provided in the film 3 disposed inside the outlet 2. In the present invention, when the height of the box is reduced, the extra space at the top of the box is reduced,
Since it becomes difficult to take out the tissue when taking it out, it is preferable to devise the shape of the take-out opening in order to solve this.

The shape of the outlet 2 of the tissue paper 5 disposed on the upper surface of the storage box 1 in the present invention is determined by the maximum longitudinal length of the outlet disposed along the long side of the rectangle, and the length of the upper surface of the box. When expressed as a ratio to the side length, it is 72 to 96%, and when expressed as a ratio to the maximum length of the outlet in the longitudinal direction, 17 to 24%.
%. When the area of the outlet arranged on the upper surface of the storage box is expressed as a ratio to the total area of the upper surface, it is preferably 23 to 32%.

If the ratio of the maximum length in the longitudinal direction of the outlet to the length of the long side of the upper surface of the box is less than 72% or the ratio of the area of the outlet to the total area of the upper surface is less than 24%, the first tissue is removed. When taking out the tissue, the tissue is apt to be torn and it is easy to come out in a group. In contrast, the ratio of the maximum length in the outlet longitudinal direction to the length of the upper surface long side exceeds 96%, or the area of the outlet is larger than 96%. If the ratio to the total area of the upper surface exceeds 32%, when the remaining amount of the tissue becomes small, the tissue that is upwardly (popped up) from the outlet falls into the box, and a problem is likely to occur. Become. Further, in the case of a box (carton) punching process or a film sticking process, when a small processing deviation occurs, the deviation cannot be absorbed, and the processing becomes difficult.

Similarly, the ratio of the maximum length in the lateral direction of the outlet 17 to 24% is determined by the difficulty of breaking the tissue when the first tissue is taken out and the outlet when the remaining amount of tissue becomes small. This is a preferable range suitable for the difficulty of falling of the tissue projecting upward from above.

In the present invention, a film having a slit for taking out a tissue is attached so as to cover the outlet on the inner side of the upper surface of the storage box, and the length of the slit disposed in the central portion of the outlet in the longitudinal direction is equal to the length of the upper surface of the box. When expressed as a ratio to the length of the long side, it is preferably 66 to 96%. If the ratio is 66% or less, the tissue is likely to be broken when the first tissue is taken out, and if it exceeds 96%, the tissue that has come out from the take-out opening when the remaining amount of tissue is small becomes less than that of the box. The reason for this is that the film easily falls into the inside, causing a problem to occur easily, and also makes it difficult to slit the film or attach the film to a box (carton). The lower limit of 66% or more is more preferably 68% or more because it is easy to take out.

By the way, in the case of tissue paper products stored in a conventionally used box, in the case of our product, the maximum length in the longitudinal direction of the outlet formed on the upper surface of the box is the length of the upper surface long side. The ratio is about 69%, the ratio of the maximum length in the lateral direction of the outlet to the maximum length in the longitudinal direction of the outlet is about 25%, the ratio of the area of the outlet to the total area of the box top is about 22%, and the slit length of the film The ratio of the length to the length of the long side of the upper surface of the box is about 64%.

Next, a method of manufacturing the tissue paper product stored in the box of the present invention will be described. The production method in the present invention is almost the same as that described in
Although the method disclosed in Japanese Patent Publication No. 1 can be used, in the present invention, in particular, selection of raw materials, a compounding method,
It has further features in the method of adjusting the density of tissue paper, etc., and also has features in adjusting the degree of beating in the stock material adjustment process in order to keep the quality (strength) at a predetermined value. The manufacturing method of the product of the present invention will be described with additional points.

As the lignocellulose fiber used in the present invention, a chemical pulp obtained by digesting softwood or hardwood with an alkaline cooking chemical is preferably used. Waste paper pulp tends to have high strength due to advanced beating, but is not desirable in terms of softness and touch. However, as long as the characteristics (quality) of the tissue of the present invention can be maintained, it may be blended. In addition, pulp such as TMP and GP may be blended within a range in which the characteristics of the present invention can be maintained.

As the paper machine for the compressed tissue paper, a commercially common Yankee paper machine, which is a combination of a paper machine such as a round net, a long net, a twin wire, and a Yankee dryer, can be used. As a matter of course, it is not preferable to use a paper machine or a paper making method that produces bulky paper such as a through-air drying method. The paper machine most suitable for the present invention is a two-layer Yankee paper machine, but it is of course possible to make a one-layer paper machine.

In the Yankee paper machine, in the case of two-layer paper making, a soft and excellent untouched hardwood-based pulp layer mainly formed on the Yankee dryer side in the thickness direction of the tissue web is formed. It is preferable to form a pulp layer mainly composed of softwood which has been subjected to a sufficient and sufficient beating as tissue paper and has high strength.

In general, at the exit of the Yankee dryer to which dry crepe has been applied, the dry side has a good touch in the thickness direction of the tissue web, and the crest of the crepe is rough on the non-dry side. Because the texture is also bad, in the ply machine, when a two-ply tissue is formed, a layer mainly composed of softwood faces the inside of the two tissues, and a layer mainly composed of hardwood is arranged outside the tissue. A product with a constant strength and a good touch can be obtained as a price. This is an important factor in the production of a comfortable compressed tissue paper. Hereinafter, the two-ply tissue (two-ply) compressed tissue paper is simply referred to as a compressed tissue paper.

In the present invention, it is preferable to mix dry pulp in the outer layer of the two-ply tissue paper, in particular, so that the quality such as the touch feeling is not impaired by the densification of the tissue paper. The mixing ratio of the slush pulp and the dry pulp is preferably such that the ratio of the dry pulp is at least 40% with respect to the total amount of the raw material pulp forming the outer layer and the inner layer. can get.

Further, in the present invention, it is preferable to use a raw material pulp having a lower courseness of the constituent fibers than in the past, in order to prevent the quality reduction due to the high density and low basis weight of the tissue paper accompanying the downsizing. The preferred range of the average courseness of the raw pulp is 7-14.
mg / 100 m 2. Low-course fibers of 14 mg / 100 m or less are generally soft, and if the basis weight is the same, since the number of fibers is large at the time of low-courseness, the surface texture is improved, the feel is excellent, and the opacity increases. It is possible to prevent a reduction in the feeling of touch due to the high density and a reduction in the opacity due to the reduction in the basis weight. In addition, 7mg / 100m
Is the lower limit of the raw pulp that can be produced from commonly available wood chips.

Further, since the strength (tensile strength, etc.) of the tissue paper tends to decrease due to the decrease in the basis weight of the tissue paper, in order to prevent the strength from decreasing, the beating degree of the raw pulp is increased in the stock preparation process, A method of appropriately selecting the type of wood as a raw material can be used.

In the present invention, it is desirable that the tissue moisture at the outlet of the Yankee dryer is high. The water must be at least 5% by weight or more, preferably 6.5% by weight or more and 9% by weight or less. If the content exceeds 9% by weight, the moisture profile is deteriorated, and the difference from the equilibrium moisture in the normal state of the tissue web is increased, so that not only the thickness control in the calendering process becomes difficult, but also a problem such as a dimensional change is caused. Occurs. When the water content is less than 5% by weight, even if the tissue bundle is compressed by applying a predetermined pressure by a folding plate type processing machine, the tissue bundle inside the product paper box returns to the bulk due to the compression recovery force with time and the top surface of the paper box. Is likely to be pushed up. In this state, when the consumer takes out the tissue from the outlet on the top of the carton, the tissue to be taken out is pressed against the top of the carton and the tissue bundle at the bottom, so smooth removal cannot be expected. The case where the tissue is broken easily occurs.

As is well known, boxed tissues are alternately folded so that one set can be taken out of the box continuously. Such a folding method is called a pop-up method, and as a method using a machine, there are an inter-hold method and a folded plate method. In the inter-hold method, the tissue is folded about half about an axis in a direction orthogonal to the machine direction. In the plate method, the tissue is folded about half in the machine direction, and if the moisture of the tissue is too low, the compression processing of the fold is insufficient, so that there is a problem in taking out the product tissue. .

In the present invention, the density of the compressed tissue paper product is set to 0.29 to 0.37 g / cm ³ (however, the paper thickness is measured on two sheets of the product). Density 0.2
If it is less than 9 g / cm ³ , a large pressurization is required by a folded plate processing machine, and the tissue bundle is likely to collapse and hinder the operation. In addition, the bulk of the tissue bundle returns due to the compression elasticity. The tissue in the product paper box tends to push up the top surface of the paper box, which is not preferable for downsizing. If the density exceeds 0.37 g / cm ³ , the tissue becomes paper-like, and not only loses the softness and quality of the tissue paper, but also deteriorates the water absorption.

As a method for controlling the density of the tissue web by combining a general Yankee paper machine and a ply machine, there are a method for controlling the crepe applied to the tissue web at the outlet of the Yankee dryer and a method for controlling the paper thickness by calendering. There is a way to do that. Conventionally, in order to make the tissue paper stored in the box compact, a method of reducing the paper thickness (by increasing the density) by calendering has been used. In order to realize the above, it has been found that it is preferable to control the density by using a method of controlling the crepe of the tissue web in combination with the conventional method of calendering. There is a quality limit to densification only with the conventional calendar processing method,
If the density exceeds a predetermined value, the tissue becomes too hard. In such a case, it is preferable to use a method of reducing the crepe ratio and reducing the paper thickness (increase the density).

The crepe of tissue paper is generally given by the difference between the peripheral speed of the dryer part and the peripheral speed of the winding section in a paper machine. That is, the bending caused by the peripheral speed difference when the tissue paper is scraped off from the surface of the Yankee dryer by the doctor blade causes wrinkles on the tissue paper. In the present invention, it has been found that the crepe ratio defined by the above formula is preferably 18 to 25%. If the crepe ratio is increased beyond this range, problems such as hardening of the tissue tend to occur when the density is increased and the paper thickness is reduced. Further, if the crepe ratio is lowered below this range, the softness of the tissue paper as a whole is lost, which is not preferable.

A specific example of the crepe rate given by the difference between the peripheral speed of the dryer part and the speed of the winding section in the paper machine is as follows.
Assuming that the peripheral speed of the winding section is 1,314 m / min.
The crepe rate of tissue paper obtained from the following formula is
It is about 22%. Crepe rate = 100 × (Dryer peripheral speed−winding unit peripheral speed) / winding unit peripheral speed

By the way, the method of controlling the paper thickness by calendering is as follows. In the case of tissue paper, a pair of sufficiently polished chilled rolls and metal rolls, one each for upper and lower, is applied to two tissue webs by a ply machine. In general, a method of controlling the paper thickness in the width direction and the flow direction of the ply machine by using a calender made of one or two stacks to improve the smoothness of the tissue surface and at the same time reduce the paper thickness. However, if the linear pressure is too high to reduce the paper thickness with this calender, the calender action on the tissue web tends to be too sharp because the actual nip width between the metal rolls is narrow, and the paper becomes stiff due to the paper layer breakage. In addition to being easy, the thickness control in the width direction is very difficult, and the winding has many wrinkles, so that satisfactory results cannot be obtained.

In the present invention, a method for controlling an optimum paper thickness over the entire width of a take-up when applying it to a folded plate type processing machine after a ply machine and maintaining excellent characteristics as a tissue paper is as follows. It is preferable to select multi-stage soft calendar processing. The soft calender is usually composed of one metal roll and the other one is made of an elastic roll.

As the metal roll, for example, a chill roll, an alloy chill roll, a steel roll, or a metal roll having a hard chromium-plated roll surface is appropriately selected and used. As the elastic roll, for example, natural rubber, styrene rubber, nitrile Various plastic resins such as rubber, chloroprene rubber, chlorosulfonated ethylene rubber, butyl rubber, polysulfide rubber, silicon rubber, fluoro rubber, urethane rubber, aromatic polyamide resin, polyimide resin, polyether resin, polyester resin, polycarbonate resin, and cotton An elastic roll made of paper, wool, tetron, nylon, or a mixture thereof is appropriately selected and used.

The elastic roll has a Shore D hardness (ASTM standard, D-2240) of from 80 to 95 degrees, preferably from 85 to 92 degrees. Among them, an elastic roll using a urethane rubber and an aromatic polyamide resin is easy to handle, has a long life, and is most preferable for obtaining the desired effects of the present invention.

As mentioned above, the number of stacks in the calendar processing is as described above. In the facial tissue, one or two stacks of chilled calendar processing are usually performed by a ply machine. In the present invention, at least two stacks are required in the soft calendar processing. Considering the paper thickness of the product and the tissue quality in total, it is desirable to use 3 to 4 stack processing.

The most suitable calendering method for producing tissue paper according to the present invention is a soft calender 3 stack process in which on-machine soft calender 1 stack process and 2-stack soft calender process in a ply machine are combined. -10 kgf / cm is preferred. More effective calendering can be performed by calendering the tissue web stored for a certain period of time with the ply machine, as well as calendering immediately after creping at the outlet of the Yankee dryer.

In the Yankee dryer, the tissue web is dried to a moisture content of about 50% to about 5% by the medium pressure steam sensible heat inside the dryer and the hot air from the dryer hood. ° C
The web is cooled somewhat while the tissue web travels a few meters to the on-machine calendering device. However, since the web temperature is close to 70 ° C, the on-machine calendering becomes hot calendering and the ply machine calendering. In comparison, the paper thickness of the tissue web is further reduced at the same linear pressure, and the feel of the tissue is further improved.

In the production of the tissue paper of the present invention, a swimming roll is used for 4 to 10 kgf / cm.
Is preferable. As is well known, swimming rolls are calendaring devices that are widely used in the paper industry for crown adjustment. The roll has a rotating metal shell and a fixed shaft, and adjusts the crown by applying hydraulic pressure between the shell and the shaft to deflect the roll.

On-machine soft calender The tissue web that has been subjected to one-stack processing is further adjusted in paper thickness by two-stack soft calender processing with a ply machine, and formed into a small winding slit to a width slightly less than twice the finished product. Then, it is put on a folding plate processing machine. As is well known, in a processing machine, a predetermined number of small windings corresponding to a predetermined number of sets of a final product are hung on an unwinder, and the tissue is pulled out in the longitudinal direction and passed through a folding plate. As a result, a predetermined number of sets of long band-shaped tissue bundles are formed at the final unwind stand. This bundle of tissues is cut into a length to fit in a paper box by a cutter, and is packed in a paper box of a predetermined size by a box packing machine (Cartoner).

In the process of processing the compressed tissue paper, it is most important to manage the bulk of the tissue bundle immediately after packing. The tissue bundle immediately after being packed in the box is pulled out, and a pressure of about 0.12 kgf / cm ² (1.18 × 10 ⁴ Pa) is applied to the upper surface of the tissue bundle.
Desirably, it is 2 to 76%.

As is well known, the final adjustment of the volume of the tissue bundle is performed by a pull unit provided in an appropriate number according to the number of sets of the tissue bundle when forming the tissue bundle in the stand portion. The pull unit is a device that sandwiches the top and bottom of the tissue bundle with a belt and can simultaneously pull and compress the tissue bundle. It is desirable to adjust the degree of pressure applied by the belt according to the result of measuring the height of the tissue bundle.
The reason why the bulk is measured by applying a pressure of about 1.18 × 10 ⁴ Pa to the tissue is that when there is no load, the measured value of the bulk has a large variation and it is difficult to perform accurate measurement. This is because there is almost no change.

The height of the pressed tissue bundle is 76% of the height of the paper box.
Is exceeded, the tissue bundle reaches a state in which the upper surface of the paper box is pushed up after about 10 days due to the compression elasticity of the tissue bundle, and as described above, there is a problem that the tissue bundle is easily broken when the tissue is taken out. On the other hand, if it is less than 64%, an excessive gap is generated between the upper surface of the tissue bundle and the upper surface of the paper box even if the return of the bulk of the tissue bundle with time is considered. As a result, the tissue bundle is wavy inside the paper box due to vibration during product transportation. And the problem that the paper breaks when the consumer takes out and uses the tissue is likely to occur.

The products to be sold of the compressed tissue paper manufactured according to the present invention had the same number of tissues per box, and the height of the paper box could be reduced by about 23% with respect to 65 mm. The tissue density was increased by about 10%, the basis weight was reduced by about 5%, and the thickness was reduced by 15%.
The quality, such as the degree of water absorption and the feeling of touch, was evaluated by test data and the like. Furthermore,
Although the ratio of the height of the tissue bundle to the height of the box was also increased by about 7%, it has been evaluated that the ease of taking out the tissue paper at the time of taking out the tissue paper does not change due to measures such as a change in the shape of the outlet.

[0063]

The present invention will be described in more detail with reference to the following Examples, but it should be understood that the present invention is by no means restricted thereto. Parts and% in Examples and Comparative Examples are parts by mass and% by mass unless otherwise specified. The measurement unit and the measurement method during the evaluation of the examples and comparative examples are as follows.

1. Basis weight: unit g / m ² : JIS S3
104. 2. Thickness: unit mm: JIS P 8118 (however,
The test conditions are as follows: temperature 20 ± 2 ° C., humidity 65 ± 2%). However, the thickness of the tissue product was measured with two sheets and divided by two. 3. Density: unit g / cm ³ : JIS P 8118
(However, the test conditions are temperature 20 ± 2 ° C, humidity 65 ± 2
%)by. 4. Tensile strength (horizontal): unit N: JIS S 3104
by. However, the test piece shall be pulled in the horizontal direction of the paper by stacking two sheets, the paper width shall be 25 ± 0.1 mm, and the grip interval shall be 1
00 ± 2 mm. (Incidentally, the reason for selecting the horizontal condition is that when the tissue paper in the box is taken out, as shown in FIG. 1, the tissue is pulled in the horizontal direction (perpendicular to the papermaking direction) and taken out. It defines the tensile strength that matches with.) 5. Water absorption: Unit: Seconds: Based on the water absorption of the drop method according to JIS S 3104. 6. Feeling of touch: Sensory evaluation method: Displayed according to the following criteria by sensory evaluation of 5 boys and 15 girls. Very good: ◎, Good: ○, Normal: △, Poor: × 7. Volume of tissue bundle: unit mm: Product is collected at the exit of the boxing machine and within 3 minutes after collection (within 3 minutes after boxing)
The bulk (height) of the tissue bundle was measured with a JIS gold scale under a pressure of 1.18 × 10 ⁴ Pa. 8. Ease of taking out product tissue: Sensory evaluation method: The product is sampled at the exit of the boxing machine, and 5-pack film packaging and cardboard packaging are performed. On the 10th to 11th days, a round trip truck transportation of about 700 km was carried out, and the transported products were indicated by the following criteria in sensory evaluations of 5 boys and 15 girls. Very good: ◎, Good: ○, Normal: △, Poor: × 9. Courseness: Unit mg / 100m: TAPPI
According to T234hm-84. The average courseness was calculated by the above equation. For example, in the case of Example 1, the course pulp on the dryer side and the course pulp on the anti-dryer side are Xa and X, respectively.
b, when the average courseness is X, it was calculated from the formula: 100 / X = 60 / Xa + 40 / Xb.

As described above, the measurement of the paper quality of the tissue paper was basically performed according to JIS S 3104, which is the JIS standard for the tissue paper. However, for the paper quality not specified in this, JIS P 8118 and JIS P 8113. However, the test condition (standard condition for humidity control and test) is JIS S3
In the case of 104, the room temperature is 20 ± 5 ° C., the humidity is 65 ± 5%, and the other conditions are based on JIS P8111.
In contrast, JIS P 8118 and JIS P
The test conditions specified in 8113 are based on JIS P 8
111 is to be applied.
Until March 31, 2000, temperature 20 ± 2 ℃, humidity 65 ±
Although 2% could be used, after that, the temperature was changed to 23 ± 1 ° C. and the humidity was changed to 50 ± 2%. Therefore, in order to avoid confusion due to such a change in the standard, the test conditions in accordance with JIS S 3104 are room temperature 20 ± 5 ° C. and humidity 65 ± 5% according to the standard.
In the case of JIS P 8118 or JIS P 8113, the conventional conditions of temperature 20 ± 2 ° C. and humidity 65
± 2% was used.

<Example 1> As raw pulp, unbeaten hardwood kraft pulp (LBKP) and beaten softwood kraft pulp (NBKP) were used as wet paper strength enhancer AF2.
55 (manufactured by Arakawa Chemical) added to pulp at a concentration of 0.12%. A twin-wire type two-layer Yankee paper machine. LBKP is on the dryer side in the tissue web thickness direction and NBKP is on the opposite side. The paper was made so that the weight ratio of the dryer side to the anti-dryer side was 60:40 so as to be on the dryer side. The papermaking moisture was adjusted to 6.8%. The on-machine calender and the ply machine calender are all soft calendering, and each pair of rolls has a urethane rubber-coated elastic roll on the upper side with a Shore hardness of 92 degrees, and the lower roll is a metal roll with a swimming roll. . The linear pressure was 7 kgf / cm (68.7 N) for both the on-machine calendar and the ply machine calendar.
/ Cm), the tissue density is 0.32
g / cm ³ . The ratio of dry pulp in the raw pulp is 70%, the average course of the fibers in the raw pulp is 11.6 mg / 100 m, the basis weight of the tissue paper is 12.0 g / m ² , and the crepe ratio is 22%.
And

In the ply machine, two sheets were stacked so that the anti-dryer side faced the inside of the tissue web, calendered, and then slit to a width of 199 mm. In a folded plate processing machine (manufactured by PCMC), 200 sets (400 sheets) of tissue bundles were formed while being folded by an inter-hold. In the pull unit, the pressure was adjusted so that the bulk of the tissue bundle immediately after processing in Examples 1 to 11 was 29 to 39 mm. With the cutter, the tissue bundle was cut into a length of 232 mm, and packed in a storage box shown in FIGS. The storage box has a short side dimension (L ₂ ) of the upper surface = 116 m.
m, long side dimension (L ₁ ) = 242 mm, box height (inner dimension, H) =
This is a 50 mm paper storage box. In addition, the size of the tissue outlet of the storage box is such that the maximum length B in the longitudinal direction is 192 mm,
The width A is 41.5 mm and the slit length 1 is 170 mm. That is, B / L ₁ = 79%, A / B = 22%, l
/ L ₁ = 70%. The ratio of the outlet area to the total area of the upper surface is 25%, and the thickness of the paper forming the box is 0.5%.
mm.

<Example 2> Except that the following conditions were changed
Was the same as in Example 1.・ Basic weight 11g / m²・ Change the calendar conditions to reduce the tissue density to 0.2.
9g / cm³And・ By changing the above conditions, the tissue thickness and tissue
The height of the bundle will necessarily change. The same applies to the following examples
It is. <Example 3> The same as Example 1 except that the following conditions were changed.
Same as above.・ Basic weight 13g / m²・ Change the calendar conditions to reduce the tissue density to 0.3.
3g / cm³And <Example 4> The same as Example 1 except that the following conditions were changed.
Same as above.・ Basic weight 12g / m²  ・ Change the calendar condition to reduce the tissue density to 0.3.
7g / cm³And <Example 5> The same as Example 1 except that the following conditions were changed.
Same as above.・ Basic weight 11g / m²・ Change the calendar conditions to reduce the tissue density to 0.3.
7g / cm³And -The height of the storage box was 43 mm (box inner dimension).

Next, although it falls within the scope of the present invention, it is not so preferred.
An example that is not desirable will be described. <Example 6> The same as Example 1 except that the following conditions were changed.
Same as above.・ By changing the type and composition of the raw pulp, the average of the raw pulp
The courseness was 15 mg / 100 m. <Example 7> The same as Example 1 except that the following conditions were changed.
Same as above.・ Basic weight 12g / m²  ・ Change the calendar condition to reduce the tissue density to 0.3.
8g / cm³And <Example 8> The same as Example 1 except that the following conditions were changed.
Same as above.・ Basic weight 14g / m²・ Change the calendar conditions to reduce the tissue density to 0.3.
4g / cm³And <Example 9> The same as Example 1 except that the following conditions were changed.
Same as above.・ Basic weight 10g / m²・ Change the calendar conditions to reduce the tissue density to 0.2.
9g / cm³And <Example 10> Example 1 except that the following conditions were changed.
The same as above.・ 26% crepe rate ・ Slightly change calendar conditions to increase tissue density
0.29g / cm³And <Example 11> Example 1 except that the following conditions were changed.
The same as above.・ Breaking machine (double disc referrer)
Inner) clearance between disks is the same as in the case of Example 1.
The load power was reduced by adjusting it to be wider. Sand
And the beating degree was lowered.

Next, a comparative example will be described. <Comparative Examples 1 to 4> The values of box tissues that have been conventionally distributed are shown.

With respect to the above Examples and Comparative Examples, the tensile strength (width), thickness, basis weight, density, water absorption, etc. of the tissue paper were measured under the above measurement conditions, and the results are shown in Table 1. Indicated.

[0072]

[Table 1]

Hereinafter, the significance of Examples and Comparative Examples shown in Table 1 will be specifically described. Example 1 shows the most typical production example. Example 2 shows the lower limit value of the density. Even in this case, the thickness of each sheet can be reduced by lowering the grammage, etc., and the ease of taking out the tissue is good. It was shown that the tensile strength can be maintained at a predetermined value. Example 3 shows the upper limit of the grammage, and shows that the tissue paper can be easily taken out by adjusting the density and the like even in that case. Example 4 showed that even when the density was set to the upper limit, the water absorption and the feeling of touch could be maintained at predetermined values. Example 5 showed that when the basis weight and density were close to the limit values, the ease of taking out the product tissue could be maintained even when the box height was reduced to 43 mm. Example 6 showed that even when the grammage and the density were kept within the predetermined ranges, increasing the value of the courseness deteriorated the feel.

Example 7 is a case where the density is too high.
It was shown that the feeling of touch deteriorated and the value of water absorption increased. Example 8 was a case where the grammage was too high, and showed that even if the density was increased, the bundle height of the tissue was high, and the take-out property of the tissue was poor. Example 9 is a case where the grammage is reduced to the limit, and it is easy to cause a paper-cutting trouble in the paper machine, which is the limit of stable production, and it is necessary to pay special attention to maintenance of water absorption and strength. Indicated. Example 10
It was shown that, when the crepe ratio was set high, the thickness of the tissue was increased (the height of the tissue bundle was increased) even under the same calendar conditions, which hindered the removal of the tissue.
In Example 11, although the basis weight and the density were within the range of Claim 3, the beating degree was low, so that the tensile strength was lowered (Claim 2).
Out of the range), indicating that the tissue paper was easily torn when it was taken out, and the takeout property was poor. Comparative Examples 1 to 4 are examples of compact box tissues that have been conventionally distributed. Compared to the product of the present invention, the thickness of the tissue is relatively thick, and the ratio of the height of the tissue bundle to the height of the storage box is set relatively small.
It requires dimensions as high as mm.

[0075]

According to the present invention, in a tissue paper product stored in a box, the height of the box to be stored for a predetermined number of sheets can be reduced to make it compact, so that it can be carried and stored by consumers. Convenience can be improved. Further, in order to make the tissue paper compact, it is necessary to reduce the thickness of the tissue paper, and the quality tends to deteriorate.However, according to the present invention, the strength, water absorption, and softness conventionally required for the tissue paper are required. The feel,
The compactness can be achieved while maintaining the quality such as the ease of taking out the tissue paper within a predetermined range. That is, the present invention provides a method for lowering the ratio of the box height to a predetermined number of tissue papers to be stored as compared with a conventional product. Since the height of the space is made small and the degree of beating is increased to compensate for the decrease in the grammage, or the type of wood used as the pulp material is appropriately selected, a predetermined strength can be maintained. Also, by preventing the density from being excessively increased, the water absorption can be maintained at a predetermined value.

According to the fourth, fifth and sixth aspects of the present invention, the length of the outlet at the top of the box and the length of the slit of the film attached to the outlet are made longer than those of the conventional product. The setting compensates for the reduced space at the top of the box and improves the ease of taking out tissue paper.

The invention according to claim 8 defines an appropriate bulk density in order to achieve compactness and maintenance of quality. According to the ninth aspect of the present invention, the tissue paper can be easily taken out by defining a numerical value relating to the extra space above the box.

According to the tenth aspect of the present invention, by setting the crepe ratio of the tissue paper to a predetermined low value, the thickness can be reduced and the compactness can be achieved. As a method of controlling the density, only the conventionally used calendering method has a quality limit in increasing the density, and if the density exceeds a predetermined value, the tissue becomes too hard. By adjusting the crepe rate in combination with the treatment method, lowering the crepe rate, increasing the density, and reducing the paper thickness, it is possible to manufacture a tissue paper that maintains softness and feel.

According to the eleventh aspect of the present invention, by setting the average courseness of the raw material pulp for producing the tissue paper to a low predetermined value, it is possible to prevent the touch feeling from being deteriorated due to the increase in the density of the tissue paper. It is possible to prevent a decrease in opacity due to a decrease in basis weight.

According to the twelfth aspect of the present invention, since the ratio of the dry pulp is set to a predetermined value or more, the feel and softness of the tissue paper are improved.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an example of a paper box storing tissue paper according to the present invention, with a part thereof cut away.

FIG. 2 is a side view schematically showing tissue paper stored in a pop-up manner via a folding plate processing machine in the box.

FIG. 3 is a top view of a tissue paper storage box.

[Explanation of symbols]

 Reference Signs List 1 tissue paper storage box 2 tissue paper outlet formed on top of storage box 3 film disposed inside outlet 2 slit 4 provided in film 3 tissue paper 5a superimposed tissue paper

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Tetsuya Kita 1-2, Tatsumi-cho, Anan-shi, Tokushima Prefecture Oji Paper Co., Ltd. Household Paper Company Tokushima Mill (72) Inventor Tetsu Hosokawa 1-Oji-cho, Kasugai-shi, Aichi Prefecture Oji Nagoya Mill, Paper Paper Co., Ltd. Household Paper Company (72) Inventor Kazuto Mizuno 1, Oji-cho, Kasugai-shi, Aichi Prefecture Oji Paper Co., Ltd. Household Paper Company, Nagoya Mill F-term (reference) CE07 CE12 CE22 CF05 DA17 DA26 EA08 EA14 3E062 AA01 AB12 AC05

Claims (12)

[Claims] 1. A tissue paper product in which a plurality of tissue papers are folded in a so-called pop-up system as a set of two tissue papers and stored in a substantially rectangular parallelepiped box, wherein the inner height of the box with respect to the number of stored tissue papers is The ratio is 40/400 to 60/400 mm / sheet, and JISP 811 per sheet of tissue paper.
A tissue paper product stored in a box, wherein the thickness specified in 8 is 0.030 to 0.043 mm. 2. The method according to claim 1, wherein the tensile strength specified by JIS S 3104 per one pair of the tissue papers is set at a dry state.
0.6-2.0N / 25mm under horizontal conditions, JIS
The tissue paper product stored in the box according to claim 1, wherein the water absorption specified in S3104 is 8 seconds or less. 3. The tissue paper product stored in the box is JIS P81 per tissue paper.
The thickness specified in JIS 18 is 0.030 to 0.040 mm, the basis weight specified in JIS S 3104 per tissue paper is 10.0 to 13.0 g / m ² , and the JIS P 8118 of the tissue paper The specified density is 0.
Tissue paper products that are accommodated in a box according to claim 1 or claim 2, characterized in that a 29~0.37g / cm ^3. 4. An outlet formed on an upper surface of the box is disposed along a long side of the box, and a maximum length in a longitudinal direction of the outlet is represented by a ratio to a length of a long side of the upper surface. ,
The tissue paper product stored in the box according to any one of claims 1 to 3, wherein the tissue paper product is 72 to 96%. 5. The method according to claim 1, wherein the maximum length of the outlet in the lateral direction is 17 to 24% when expressed as a ratio to the maximum length in the longitudinal direction of the outlet. Tissue paper products stored in the box described in any of the above. 6. The apparatus according to claim 1, wherein the area of the outlet provided on the upper surface of the box is 23 to 32% when expressed as a ratio to the total area of the upper surface. Tissue paper products stored in the box described. 7. Attaching a film having a tissue take-out slit to the inside of the upper surface of the box, disposing the slit in the longitudinal direction of the box at the center of the take-out opening of the box, and setting the slit length to: The tissue paper product stored in the box according to any one of claims 1 to 6, wherein the ratio is 66 to 96% when expressed as a ratio to the length of the long side of the upper surface of the box. 8. Total weight of tissue paper / volume in box
The bulk density based on the box volume specified in the above is 0.13 to 0.17
The tissue paper product stored in the box according to any one of claims 1 to 7, wherein the tissue paper product is g / cm ³ . 9. The height of a bundle of all the tissue papers stored in the box when measured by applying a pressure of 1.18 × 10 ⁴ Pa within 3 minutes after the storage in the box. The tissue paper product stored in the box according to any one of claims 1 to 8, wherein the ratio is 62 to 76% when expressed as a ratio to the inside height. 10. The crepe of the tissue paper stored in the box is given by the difference between the peripheral speed of the dryer part and the peripheral speed of the winding section in the paper machine, and the crepe rate defined by the following equation is 18: The tissue paper product stored in the box according to any one of claims 1 to 9, wherein the tissue paper product is 25%. Crepe rate = 100 × (Dryer peripheral speed−winding unit peripheral speed) / winding unit peripheral speed 11. An average courseness of a raw pulp for making tissue paper stored in the box is 7 to 14 mg.
The tissue paper product stored in the box according to any one of claims 1 to 10, wherein the tissue paper product is / 100m. 12. The method according to claim 1, wherein the ratio of dry pulp in the raw pulp for making the tissue paper stored in the box is 40% or more by mass% based on the total amount of the raw pulp. A tissue paper product stored in the box described in any one of 11 above.