JP2003070678A - Rolled sanitary paper for toilet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide rolled sanitary paper for a toilet matching with the human sensory evaluation at a high degree. SOLUTION: This rolled sanitary paper for a toilet is formed by compressing a paper sample to 50 g/cm<2> of the maximum compression load between steel plates having a circular plane at 2 cm<2> of compression area, and the paper having rectilinearity of a displacement curve showing a relation between a load and thickness when unrolling the paper at 0.2500-0.3300 (-) with one ply and at 0.3400-0.3700 (-) with two plies and having thickness at 0.1400 mm or more with one ply and at 0.2500 mm or more with two plies when a load at 50 g/cm<2> is applied is used.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a toilet sanitary roll paper such as a so-called toilet paper roll.

[0002]

2. Description of the Related Art Toilet rolls are required by consumers to have strict quality because the toilet paper directly hits sensitive skin. Consumers instinctively respond to human sensory items such as softness, suppleness, fluffiness, hardness, and smoothness expressed in words.

[0003] Therefore, the producer conventionally evaluates the physical properties of paper, such as rice slab, paper thickness, strength and elongation, as the evaluation items corresponding to the sensory items. It was common to use "softness" or "MMD" as an index.

"Softness" represents a resistance value (average value in the vertical and horizontal directions) when a paper of 10 cm width is pushed into a gap of 5.0 mm width by terminals, and "MMD" is a contact wound with a piano wire. It represents the variation (average deviation) of the friction coefficient of paper, and is a measurement method generally used for sanitary paper.

[0005]

However, the softness is not always sufficiently correlated with the softness and suppleness evaluated by a person due to the influence of the friction between the paper and the terminal. Although MMD has a correlation with the smoothness felt on the skin,
The difference between simple slipperiness and smoothness could not be expressed in the numerical results.

Thus, in the conventional quality measuring method, the softness, suppleness, softness, smoothness of touch, etc. required for the toilet roll cannot be sufficiently grasped, and the quality cannot be reproduced, or It was not possible to confirm that it was reproduced.

The paper quality data, software, and MMD alone have not sufficiently grasped the delicate quality felt by humans, and it has not been possible to sufficiently perform absolute evaluation in time series and analysis of differences from competitor products.

[0008] Therefore, a main object of the present invention is to provide a roll-up sanitary roll paper for toilet, which is excellent in human sensory evaluation and has a high sensory evaluation.

Another problem is that by using two measurement data in combination in each of the three basic measurement methods, and further by using three basic measurement methods and six measurement data, the toilet The objective is to quantify the softness, suppleness, and smoothness of the rolls, and to be able to manage and control the quality of the toilet rolls using the measurement data.

[0010]

SUMMARY OF THE INVENTION The present invention has the following features to solve the above problems. <Invention of Claim 1> The straightness of the displacement curve of load and thickness when compressing a paper sample up to a maximum compression load of 50 g / cm 2 between steel plates having circular flat surfaces with a compression area of 2 cm ² and returning it to the original state. Is; 0.2500-0.3300 in 1 ply
(-) 0.3400-0.3700 (-) with 2 plies
And the thickness at a load of 50 g / cm ² is 0.1400 mm or more for one ply and 0.2500 m for two plies.
A roll-up sanitary roll paper for a toilet characterized by having a length of m or more.

<Invention of Claim 2> Load 0.5 g /
Difference in thickness between cm ² and 50 g / cm ² is 0.2000 mm or more for 1 ply, 0.2000 mm or more for 2 plies, 0.2000 gcm / cm ² or less for 1 ply, and 0.2200 gcm / cm for 2 plies. ^The roll-up sanitary roll paper for toilet according to claim 1, which is ² or less.

<Invention of Claim 3> A paper sample having a width of 20 cm is chucked at a distance of 1 cm, and one side of the paper sample is bent to a maximum curvature of 2.5 cm ^-1 by pure bending that always keeps an arc, and then returned to its original state. Next, in the relationship between the curvature and the bending moment when it is bent back to the maximum curvature of −2.5 cm ^{−1 and} then returned to its original state, it is represented by an average inclination between the curvatures of 0.5 and 1.5 cm ^−1. the average value of the vertical and horizontal bending stiffness of the paper; 1 ply 0.0080g · cm ² / cm or less, or less 0.0180g · cm ² / cm 2 ply, and,
The average lengthwise and transverse values of the bending recovery of the paper expressed by the average hysteresis width of the bending moment between the curvatures of 0.5 to 1.5 cm ⁻¹ ; 0.0030 to 0.005 per ply
0g · cm ² / cm, 2 plies 0.0130-0.0
170 g · cm ² / cm, a sanitary roll paper roll for toilets, characterized in that

<Invention of Claim 4> The cross-sectional diameter is 0.
It consists of a 5 mm piano wire, and the length of its contact surface is 5 mm.
While contacting the paper sample with a contact pressure of 10 g on the paper sample and applying a tension of 20 g / cm to the paper sample in the moving direction, 0.1 c was applied in a direction orthogonal to the length direction of the friction member.
When moving 2 cm at the speed of m / sec, the average value of the longitudinal and lateral of the front surface and the longitudinal and lateral directions of the back surface in one ply and the back surface in one ply in the average deviation of the friction coefficient is 0.0320 or less, The average value of length and width is 0.0290 or less, and
The average value of the longitudinal and lateral sides of the front surface and the longitudinal and lateral sides of the back surface of one ply in the average friction coefficient of paper is 0.2600 to 0.28.
00, the average value of the longitudinal and lateral surfaces of the two-ply surface of the average coefficient of friction of the paper is 0.3500 to 0.3800;

<Invention according to claim 5> 15 to 25 tsubo
g / m ² , paper thickness 120 to 180 μm, tensile aspect ratio 2.
0. 〜3.0, longitudinal elongation 20 to 35%, tensile strength longitudinal 110 to 150 N / m, crepe number 30 to
The roll-up sanitary roll paper for toilet according to any one of claims 1 to 46, wherein the roll paper is 50 rolls / cm.

<Invention according to claim 6> 15 to 25 tsubo
g / m ² , paper thickness 120 to 180 μm, tensile aspect ratio 2.
0. 〜3.0, longitudinal elongation 20 to 35%, tensile strength longitudinal 110 to 150 N / m, crepe number 30 to
A roll-up sanitary roll paper for toilet, which is 50 rolls / cm and satisfies the requirements of claims 1, 3 and 4.

Since the one-ply product and the two-ply product are originally different from each other, they are described together in the above-mentioned provisions of the present invention, but they do not mean that both conditions are satisfied at the same time. Note that the relationship is defined by the case of the 1-ply product and the 2-ply product.

[0017]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described in more detail with reference to the drawings. 1 ply (1 sheet)
The thing of 1P and the thing of 2 plies (two pieces) are described as 2P.
In addition, the basis weight of rice, elongation, tensile strength (tensile aspect ratio) is JIS
It is a measurement value based on. The paper thickness is JIS P 8111.
Under the conditions of Ozaki, dial thickness gauge "P
It is measured using "EACOCK G type". In particular,
Check that there is no dust, dust, etc. between the plunger and the measuring table, lower the plunger on the measuring table, move the memory of the dial thickness gauge to set the zero point, and then raise the plunger. Place the sample (tissue paper) on the test table, slowly lower the plunger, and read the gauge at that time. At this time, just mount the plunger. It should be noted that the measurement is performed on one sheet and the average value is obtained 10 times. Furthermore, the unit of force g is "g
f ”is meant. Regarding the characteristic tester, we will also refer to the model below, but if the basic measurement principle is the same,
You can use similar testing machines.

The present inventor has found that it is desirable to use the following three characteristics as evaluation criteria. And, it was also found that the one satisfying the characteristics defined below as much as possible has a higher commercial value with respect to the actual toilet roll or toilet paper.

1) Compression characteristics: LC, TM, WC and (T
0-TM) For this compression characteristic test, "Handy compression tester KES-G5" manufactured by Kato Tech Co., Ltd. was used, and a compression area of 2
Maximum compression load of 50g between steel plates with circular flat surface of cm ²
This is to evaluate the compression characteristics when the paper sample is compressed to / cm ^{2 and} then restored. In the compression characteristics shown in FIG. 1 at this time, in the present invention, the straightness of the displacement curve of the load and the thickness is 0.2500 to 0.3300 in one ply.
(-) 0.3400-0.3700 (-) with 2 plies
It is said to indicate the straightness of.

Here, the straightness (compressive hardness) LC indicates the ratio of the area S / ΔABC of the shaded area shown in FIG. LC means the straightness of the repulsive force with respect to the indentation depth, and the stiffer the straightness, the higher the numerical value. This is a numerical range in which you can feel the appropriate repulsive force when pushed in by hand.

Further, in the present invention, a load of 50 g /
The thickness TM in cm ² is 0.1400 mm or more for one ply and 0.2500 mm or more for two plies.

The thickness T0 at a load of 0.5 g / cm ²
And difference in displacement of thickness TM at 50 g / cm ² (T0-TM)
However, 1 ply is 0.2000 mm or more, and 2 plies are 0.
It is desirable to set it to 2000 mm or more. The larger T0-TM, the larger the indentation depth when pressed up to 50 gf / cm ² , indicating that the paper quality is fluffy. Also, the compression work WC is 0.2000 g per ply.
cm / cm ² or less, 2 ply 0.2200 gcm / cm
It is desirable to be ² or less.

2) Bending characteristics: B and 2HB For this bending characteristic test, "automatic pure bending tester KESFB2-AUTO-A" manufactured by Kato Tech Co., Ltd. was used, and as shown in FIG. The sample was chucked at a distance of 1 cm, and one side was bent to the front side with a maximum curvature of 2.5 cm ^-1 by pure bending that always kept an arc, and then returned to its original position.
Next, the relationship between the curvature and the bending moment when the plate is bent back to the maximum curvature of −2.5 cm ^{−1 and} then returned to the original position is evaluated.

This relationship is obtained as a value on the hysteresis curve shown in FIG. 3, and in the present invention, the curvature is 0.5 to 0.5.
The average value of the bending stiffness B of the paper expressed by the average inclination between 1.5 cm ^-1 in the longitudinal and lateral directions (B average); 0.0 in 1 ply.
080g · cm ² / cm or less, 2 plies 0.0180g
・ Cm ² / cm or less. Average value of bending hardness B (B
The larger the average, the harder it is to bend and the harder it is. According to the scope of the present invention, bending resistance is small.

Further, the bending recovery property of the paper expressed by the average hysteresis width of the bending moment between the curvatures of 0.5 to 1.5 cm ^-1 The average of the length and width of 2HB (2HB average)
But; 0.0030-0.0050 g · cm ² per ply
/ Cm, 2 plies 0.0130-0.0170 g · c
It is set to m ² / cm. Bending recovery property 2HB average (2H
The larger the (B average) is, the worse (lower) the bend recovery is. The present invention defines a numerical range that exhibits moderate bending recovery.

3) Surface characteristics: MMD and MIU "Friction tester KESSE" manufactured by Kato Tech Co., Ltd. can be used for the test of the surface characteristics. When measuring, as shown in Fig. 4, the cross-sectional diameter is 0.5 m
A friction element made of a piano wire having a length of 5 mm and having a contact surface of 5 mm is brought into contact with the paper sample at a contact pressure of 10 g, and a tension of 20 g / cm is applied to the paper sample in the moving direction. When moving 2 cm at a speed of 1 cm / sec,
The coefficient of friction is measured.

In the present invention, the average deviation of the friction coefficient (the variation of the surface thickness when the friction member is moved, that is, the friction coefficient divided by the friction distance (moving distance = 2 cm))
The average value of the length and width of the front surface and the length and width of the back surface (MMD front and back average) in one ply in MMD is 0.0320 or less, and the average value of the length and width of the front surface in two plies (MMD front average). Is set to 0.0290 or less. In the case of the present invention, smoothness is provided because the variation is small.

The average friction coefficient MIU of paper is 1
The average value of the vertical and horizontal of the front and the vertical and horizontal of the back in the ply (MIU front and back average) is 0.2600 to 0.2800.
0, the average value in the longitudinal and lateral directions of the surface (MIU table average) at 2 plies in the average friction coefficient of paper is 0.3500-0.
It is set to 3800. According to the present invention, a moderate frictional resistance is provided, and a smooth stability is felt.

The above compression hardness, the thickness at the maximum load,
The quality characteristics required for the toilet roll can be reproduced by setting the measured values of the six items of the bending hardness, the bending recovery property, the surface friction coefficient, and the average deviation of the surface friction coefficient within the predetermined ranges.

The compression characteristics are adjusted by the blending ratio of the raw materials LBKP and NBKP, the type of pulp (fiber roughness, or the type and age of the trees used as raw materials), the beating degree, the water content of the papermaking, the calender gap, the pressure, the material, etc. It is possible to It is desirable that the pulp does not contain waste paper pulp.

The bending characteristics can be adjusted by the tensile strength, aspect ratio, crepe shape (crepe ratio, crepe height difference, etc.), water content, density, addition of paper strength agent, and the like.

The surface characteristics can be adjusted by the pulp blending, calendering conditions, papermaking water content, doctor blade angle, blade angle, adhesive / peel strength balance, crepe ratio and the like.

Of the above three characteristics, if one characteristic changes, the other characteristics also change and it is difficult to control. By quantifying this characteristic and grasping the correlation by using the displacement of each quality characteristic due to the manufacturing condition change as data, the quality of the toilet roll desired by the consumer can be reproduced.

[0034]

[Examples] While repeating the above-mentioned three types of characteristic tests and six data collections, the correspondence with the sensory evaluation of 100 adults was examined. In this sensory evaluation, “hand feeling (thickness)”, “softness”, and “smoothness” were evaluated in four levels of 1 to 4 and expressed as an average value, and the higher the value, the higher the evaluation. Further, the comprehensive evaluation is an average value indicating whether or not it is comprehensively preferable as a toilet paper, similarly evaluated in four stages of 1 to 4. All of the comparative examples represent current commercial products.

(1) Compression characteristics: Table 1 shows the results regarding LC, TM, WC and (T0-TM). In addition, in Table 1, the comprehensive evaluation including other characteristics and the paper quality data are also shown.

[0036]

[Table 1]

(2) Bending characteristics: Regarding B and 2HB,
The results are shown in Table 2.

[0038]

[Table 2]

(3) Surface characteristics: The results are shown in Tables 3 and 4 for MMD and MIU, respectively.

[0040]

[Table 3]

[0041]

[Table 4]

From the above results, the embodiment is
It can be seen that it is excellent in terms of "softness and hand feeling", "softness" and "smoothness".

[0043]

INDUSTRIAL APPLICABILITY As described above, according to the present invention, it is possible to provide a roll-up sanitary roll paper for toilet which is excellent in sensory evaluation of humans and has a high sensory evaluation.

By using the three basic measurement methods and the six measurement data in combination, the softness, suppleness and smoothness of the toilet roll are quantified, and the quality of the toilet roll is controlled by the measurement data. You can control.

[Brief description of drawings]

FIG. 1 is an explanatory diagram of a compression characteristic test method of the present invention.

FIG. 2 is an explanatory diagram of a bending characteristic test method of the present invention.

FIG. 3 is a relationship diagram of bending characteristics.

FIG. 4 is an explanatory diagram of a friction characteristic testing method of the present invention.

Claims (6)

[Claims] 1. A between steel plates with circular plane of compression area 2 cm ^2, to compress the paper sample up compressive load 50 g / cm ^2,
Straightness of load-thickness displacement curve when returning to original condition; 1
The ply has a thickness of 0.2500 to 0.3300 (-), the two plies have a thickness of 0.3400 to 0.3700 (-), and the thickness at a load of 50 g / cm ² is 0.1 for one ply.
A roll-up sanitary roll paper for toilets, which has a length of 400 mm or more and 0.2500 mm or more for two plies. ^2. A thickness displacement difference between a load of 0.5 g / cm ² and a load of 50 g / cm ² ; 0.2000 mm or more for one ply, 2
0.2000 mm or more for plies, 0.2000 gcm / cm ² or less for one ply, and 0.22 for 2 plies
The roll-up sanitary roll paper for toilet according to claim 1, which has a content of 00 gcm / cm ² or less. 3. A paper sample having a width of 20 cm and a chuck interval of 1 c
and m, one always undone after bending the front side up to maximum curvature 2.5 cm ^-1 by pure bending maintain an arc, then when undone after bending the back up of curvature -2.5 cm ^-1 In the relationship between the curvature and the bending moment at,
The average value of the bending stiffness of the paper expressed by the average inclination of 0.5 to 1.5 cm ^-1 in the vertical and horizontal directions is 0.00 in 1 ply.
80 g · cm ² / cm or less, 2 plies 0.0180 g ·
cm ² / cm or less, and the average value of the longitudinal and lateral bending recoverability of the paper expressed by the average hysteresis width of the bending moment between the curvature of 0.5 to 1.5 cm ⁻¹ ; .0030-0.
0050g · cm ² / cm 0.0130 with 2 plies
A roll-up sanitary roll paper for a toilet characterized by having a weight of 0.0170 g · cm ² / cm. 4. A friction wire made of a piano wire having a cross-sectional diameter of 0.5 mm and having a contact surface length of 5 mm is brought into contact with a paper sample at a contact pressure of 10 g, and 20 g in the moving direction.
The surface with one ply in the average deviation of the friction coefficient when the paper sample is moved by 2 cm at a speed of 0.1 cm / sec in the direction orthogonal to the length direction of the friction element while applying a tension of / cm to the paper sample. The average value of the vertical and horizontal directions and the vertical and horizontal values of the back surface is;
0320 or less, the average value of the length and width of the front surface in two plies is 0.0290 or less, and the average value of the length and width of the front surface and the average value of the length and width of the back surface in one ply in the average friction coefficient of the paper are 0.2600-
0.2800, the average length and width of the surface at 2 plies in the average friction coefficient of paper is 0.3500 to 0.380.
A roll-up sanitary roll paper for toilets, which has a value of 0. 5. A tsubo of 15 to 25 g / m ² and a paper thickness of 120 to 1
80 μm, tensile aspect ratio 2.0. ~ 3.0, longitudinal elongation 20-35%, and tensile strength longitudinal 110-150N
/ M, and the number of crepes is 30 to 50 / cm, The roll-up sanitary roll paper for toilet according to any one of claims 1 to 4, wherein 6. A basis weight of 15 to 25 g / m ² and a paper thickness of 120 to 1
80 μm, tensile aspect ratio 2.0. ~ 3.0, longitudinal elongation 20-35%, and tensile strength longitudinal 110-150N
/ M, the number of crepes is 30 to 50 / cm, and the requirements for the claims 1 to 3 and 4 are satisfied, and a roll-up sanitary roll paper for toilet.