JP5922441B2 - Waste paper coreless toilet roll and method for producing waste paper coreless toilet roll - Google Patents

Description

  The present invention relates to a waste paper coreless toilet roll in which toilet paper made from waste paper is wound without using a core, and a method for producing the same.

The mainstream in the market is a waste paper toilet roll having a length of 100 to 130 m and having no tube core, which is a roll of toilet paper made from recycled waste paper.
Many of these waste paper coreless toilet rolls are traded as commercial products for various facilities, and the required quality and price are different from single consumer products of about 60 m.
And in recent years, in facilities using waste paper coreless toilet rolls, especially for restaurants in the food service industry, the frequency of replacement is low, in order to reduce miscellaneous work, labor costs, and storage space, Longer rolls and more compact ones have been demanded. In order to increase the winding length of the toilet roll, it is possible to increase the winding diameter or to decrease the inner diameter, and it is also possible to make the roll compact by reducing the roll width.
However, the size of the toilet roll is defined by the JIS standard, and a commercially available paper holder (cigarette roll) is made based on the toilet roll of the JIS standard. Some toilet rolls without tube cores are commercial products, so there are proprietary standards such as those sold as a set with a holder that have a very long winding length and a large diameter and a narrow roll width. However, such a product is not compatible and cannot be used in restaurants and the like using a paper roll (paper holder) that assumes a shape conforming to a general JIS standard.

  Waste paper coreless toilet rolls are not mainstream, but there are rolls with a winding length of 170-180m in conformity with JIS standards, but the mainstream in terms of softness, strength and feel. It was inferior compared with a product with a winding length of 100 to 130 m.

JP 2009-112512 A JP 2006-021020 A Japanese Patent No. 2010-69147 Japanese Patent Laid-Open No. 2001-98481 Japanese Patent No. 3504611

  Therefore, the main problem of the present invention is that it is superior to the conventional mainstream 100-130 m roll of waste paper coreless toilet rolls, and has a softness, etc., and has a very long winding length, and also a toilet paper holder compliant with JIS standards. An object of the present invention is to provide a waste paper coreless toilet roll that can be used and has a compact shape.

  The present invention that has solved the above problems is as follows.

[Invention of Claim 1]
Toilet roll made from recycled paper is 190m or more, wound without a core, with a roll diameter of 100 to 118mm, a roll width of 105 to 116mm, and an inner diameter of 30 to 45mm.
The toilet paper contains a filler derived from waste paper, has an ash content of 3 to 10% by weight, is not calendered, has a paper thickness of 70 to 90 μm, and a density of 0.17 to 0 .21 g / cm ³ , elongation ratio of 6% to 9%, aspect ratio (length / width) of dry tensile strength of 3.5 or less, and softness of 2.34 to 2.91 g. Toilet roll without waste paper core.

[Invention of Claim 2 ]
The dry tensile strength of the toilet paper, the machine direction 250 cN / 25 mm or more, lateral 70cN / 25mm or more, claim 1 paper tube coreless toilet rolls according.

[Invention of claim 3 ]
A method of manufacturing a waste paper coreless toilet roll in which toilet paper made from recycled paper is wound without a core,
Using a pulp raw material containing 95% by weight or more of waste paper pulp made from high-quality waste paper containing ash, the crepe rate in the creping doctor is 7 to 11%, and without performing a calendar process,
It contains a filler derived from the above-mentioned high-quality waste paper, has an ash content of 3 to 10% by weight, a paper thickness of 70 to 90 μm, a density of 0.17 to 0.21 g / cm ³ and an elongation of 6%. A toilet paper base paper having a dry tensile strength aspect ratio (length / width) of 3.5 or less and a softness of 2.34 to 2.91 g;
The toilet paper base paper is rolled over 190 m without a core to form a log having a winding diameter of 100 to 118 mm and an inner diameter of 30 to 45 mm.
Thereafter, the log is cut so that the roll width is 105 to 116 mm.
A method for producing a toilet roll without a core of used paper tube, characterized in that.

  According to the present invention described above, while maintaining the same softness and robustness as a conventional waste paper tubeless coreless toilet roll, the winding length is longer and it can be used for a toilet paper holder compliant with JIS standards. A wastepaper coreless toilet roll having a compact shape is provided.

It is a perspective view for demonstrating the toilet roll without a waste paper tube core which concerns on this invention.

  Hereinafter, the toilet roll X1 without tube core according to the present invention will be described in detail with reference to the drawings. As shown in FIG. 1, the toilet roll X1 according to the present invention is a tubeless toilet roll X1 having no tube core also called a paper tube (hereinafter, simply referred to as a toilet roll), and the core portion 1 is The toilet paper itself constituting the toilet roll X1 is formed by being adhered with adhesive glue. The toilet roll X1 without a tube core according to the present invention can be manufactured without a core by winding the toilet paper 2 by a known winding method.

  As for the outer shape of the toilet roll according to the present invention, the roll diameter (sometimes referred to as the outer diameter) L1 is 100 to 118 mm, the roll width (same as the paper width) L2 is 105 to 116 mm, and the inner diameter L3 is 30 to 45 mm. It is. With this outer shape, a paper holder that assumes a general JIS standard toilet roll can be used without problems.

  Here, the toilet roll X1 according to the present invention has a characteristic composition of the toilet paper 2, while ensuring the softness, strength, and touch feeling equal to or higher than the conventional mainstream toilet roll X1 without waste paper core. In addition, a winding length of 190 m or more is achieved, which is significantly longer than the winding length of 100 to 130 m of toilet paper without cores of conventional waste paper tube cores.

  The winding length of 190 m is longer than the conventional products of 170 to 180 m that focus on the winding length that is inferior in softness and touch. In addition, although it does not limit about the upper limit of the winding length of the toilet roll X1 which concerns on this invention, 210 m or less is desirable. Shorter is easier to manufacture. If it exceeds 210 m, it will be necessary to make the tension at the time of winding extremely high, and it will be difficult to manufacture the toilet paper 2 according to the present invention.

  Here, in the toilet paper 2 according to the present invention, the pulp material is 95% or more, 98%, particularly 100% of the waste paper pulp. NBKP and LBKP are used if used with fiber raw materials other than waste paper pulp. In addition, in the category of the toilet roll without tube core, if the waste paper pulp is less than 95%, the cost becomes too high. In particular, the present invention requires the toilet paper 2 to have a predetermined ash content, as will be described later. Therefore, when the waste paper raw material containing the filler is not used, a sufficient amount of ash cannot be secured and cannot be manufactured. It will be.

  The toilet paper 2 according to the present invention is a single one-ply thing. The above-mentioned winding length cannot be set for a two-ply or double type. The toilet paper according to the present invention is not provided with embossing. When embossing is applied to make the paper bulky, the winding length cannot be set to the winding length.

  And the toilet paper 2 which concerns on the toilet roll X1 of this invention has a paper thickness of 70-90 micrometers characteristically in order to achieve very long winding length, ensuring said softness, intensity | strength, and a touch feeling. The waste paper-derived filler is included, the ash content is 3 to 10% by weight, and the aspect ratio (length / width) of the dry tensile strength is 3.5 or less. The paper thickness in the present invention is a value measured with a dial thickness gauge: Peacock manufactured by Ozaki Seisakusho.

  Here, it is possible to increase the winding length by simply reducing the paper thickness to 70-90 μm, but if the paper thickness is simply reduced, it will be unreliable and unreliable, and liquid will easily pass through. This is undesirable for toilet paper whose primary purpose is wiping off objects. Then, in the toilet paper 2 which concerns on this invention, when the filler derived from used paper was made and the ash content was made into 3 to 10 weight%, the surface of the toilet paper 2 became dense and smooth, and the show-through property of the liquid was As a result, the paper has moderate stiffness and stiffness, and the problem due to the thinness has been solved. This is thought to be caused by the fact that the filler settles earlier than the fibers during the papermaking process, and the filler gathers at a position close to the felt surface, that is, on one side.

If the ash content is less than 3%, the above effects cannot be obtained sufficiently, and if it exceeds 10%, the fiber content is small and the strength does not come out. . The ash content (%) referred to here is an ash test method according to JIS P 8251, and the mass of the residue after burning the paper required at a combustion temperature of 600 ° C. It is a value obtained by dividing by mass and multiplying by 100.

  Further, in the toilet paper 2 according to the present invention, the aspect ratio obtained by dividing the dry tensile strength in the vertical direction described in JIS P 8113 by the dry tensile strength in the horizontal direction was set to 3.5 or less, and the vertical and horizontal difference was reduced. Thereby, it can design at a low density and becomes a soft thing. The aspect ratio may be adjusted by discharging the papermaking raw material from the head box.

  Here, the dry tensile strength in the longitudinal direction is specifically 250 cN / 25 mm or more, and the dry tensile strength in the transverse direction is preferably 70 cN / 25 mm or more. This can be achieved with a dry paper strength agent.

  On the other hand, the toilet paper 2 according to the present invention desirably has an elongation of 6% to 9%. In order to obtain this elongation rate, the crepe rate at the time of manufacture is preferably as low as 7 to 11%. By reducing the crepe rate, the paper thickness becomes thinner, the surface becomes smoother, and the difference in aspect ratio becomes smaller. In producing the toilet paper of the present invention, it is desirable not to perform a calendar process in order to ensure softness.

On the other hand, the density of the toilet paper 2 according to the present invention is preferably 0.17 to 0.21 g / cm ³ . When the density is less than 0.17 g / cm ^3, it becomes difficult to maintain the paper strength, and when the density exceeds 0.21 g / cm ³ , the texture becomes hard and the touch feeling becomes inferior to the conventional product.

  Here, the waste paper raw material, the filler, and the ash content according to the present invention will be described in more detail. In the production of toilet paper, normally, no filler is added, and the normal product for general consumers contains no filler. In addition, the ash content of toilet paper consisting only of virgin pulp is less than 1%. The presence of a predetermined ash content in the toilet paper usually means that the waste paper raw material is used. And almost all the ash is due to fillers derived from waste paper.

In order to obtain the ash content of the toilet paper according to the present invention, it is preferable that the fiber raw material is appropriately selected and blended from high-quality waste paper among waste paper. The reason for this is that high-quality waste paper consists mainly of Kent paper, imitation paper, insert pages, shredder trash, copy paper, etc., and by adjusting the blending ratio, the ash content of the raw material is about 12 to 18% by weight as a whole. This is because even if 95 to 100% by weight is used as the fiber raw material as it is, it can be within the ash content of the toilet paper of the present invention. Furthermore, among high-quality used paper, especially Kent paper and imitation paper contain many fibers having a relatively long fiber length, so that desired paper strength and texture are easily exhibited. Coated paper or the like has a high ash content of 20 to 30% by weight, but the fiber quality is close to that of high-quality waste paper and can be blended as a raw material for adjusting the amount of ash.
However, since shredder waste tends to be more fragmented among high-quality waste paper, when using high-quality waste paper that contains excessive shredder waste (including roughly 30% or more), adjust the blending ratio accordingly. To do.
Further, as used paper, liner paper such as newspaper and corrugated cardboard is not preferable as a raw material for toilet rolls because it contains a lot of mechanical pulp and unbleached / semi-bleached pulp that are easily discolored by ultraviolet rays.

In addition, although the manufacturing method of the used paper pulp which concerns on this invention is not limited, it is good to carry out the method of manufacturing the used paper pulp from used paper as follows.
First, after the used paper is disaggregated by a conventional method, coarse selection is performed to remove coarse foreign matters using a screen or a cleaner. For the disaggregation, facilities such as a pulper that can obtain a high shearing force, a waste paper high-concentration disaggregation device called fiber flow, and a global pot are used.
Next, the raw material after the rough selection is concentrated, kneaded (kneading) and ripened (soaked) by adding known chemicals and the like.
The concentration treatment can be performed using, for example, a centrifuge or a decanter. At this time, it is preferable to dehydrate the raw material after rough selection so that the concentration after concentration treatment is 3 to 30%.
When the concentration after concentration treatment is less than 3%, even if physical shearing by subsequent kneading is performed, the effect of finely dispersing the ash source that is mainly filler is small, and conversely 30% If the concentration exceeds 50, it becomes too hard and it becomes difficult to perform a desired kneading treatment (physical shearing).
Kneading uses, for example, a deflaker, a high-speed kneader (for example, a mica processor (trade name) manufactured by Ishikawajima Industrial Machinery Co., Ltd. or a super deflaker (trade name) manufactured by Susumu Kikai Co., Ltd.), a kneader, a disperser, etc. Can be done.
After the kneading, the ink is removed from the pulp fiber by aging (soaking), and then deinking is performed by flotation in the washing / selection process to obtain waste paper pulp. In addition, the process from a concentration process to a flotation can be repeatedly performed several times suitably.
When flotation is performed, water is added to the treated raw material so that the raw material concentration is less than 3%. If the raw material concentration at this time exceeds 3%, the necessary ash source is also discharged as deinking floss, resulting in poor foaming and reduced cleaning efficiency. Usually, the raw material concentration is about 1%. The deinking floss generated by this flotation is discharged out of the system because carbon black is the main component.

  In producing the used paper pulp according to the present invention, a series of processes from concentration to flotation can be performed at an appropriate number of times in consideration of the amount of ash content in the used paper pulp. In general, considering the improvement of the equipment cost and the degree of decentralization, it is preferable to perform kneading about twice. It is also possible to separate the deinking floss by disaggregation by high concentration disaggregation treatment (fiber flow) instead of flotation, and by washing with a washing device such as a valve filter.

Here, in this invention, in order to make the ash content rate in toilet paper into a predetermined ratio, the ash content rate in the waste paper pulp used as the raw material of the said toilet paper is adjusted.
Adjustment of the amount of ash content in the waste paper pulp can be done by adjusting the number of times from concentration to washing / selection process, by flotation and washing / selection process, and omitting some of the selection processes such as flotation. It can be carried out by concentrating the raw material in the filtrate after washing discharged at the time and returning it to an appropriate pre-stage or discharging it outside the system.
In addition, the preferred ash content of waste paper pulp in the present invention is 10 to 15% by weight. Considering the loss of ash content in the paper making process, toilet paper with an ash content of 3 to 10% by weight can be obtained by making paper using the waste paper pulp with the above ash content.

Next, the papermaking of the toilet paper according to the toilet roll according to the present invention will be described. The toilet paper according to the present invention comprises a papermaking raw material mainly composed of raw pulp having 95% by weight or more of wastepaper pulp obtained from the above-mentioned wastepaper, and a known crepe paper making process, specifically, a wire (felt) part. It can be manufactured through a press part and a dryer part.
In consideration of the thickness, aspect ratio, and the like of the toilet paper according to the present invention, the discharge amount of the paper material from the head box, the conveyance speed, and the like are appropriately adjusted.
When making paper, use appropriate chemicals such as dispersants, caustic soda, aqueous ammonia and other pH adjusters, antifoaming agents, preservatives, fluorescent dyes, mold release agents, water resistance agents, flow modifiers, and yield improvers. Can be added.

Here, when manufacturing the toilet paper which concerns on this invention, the crepe rate at the time of performing creping with a Yanki dryer shall be 7-11%.
In producing the toilet paper according to the present invention, from the viewpoint of maintaining softness, it is preferable not to perform the calendar process, and it is preferable to adjust the paper thickness only by the crepe rate. By doing in this way, it can be set as the desired texture while becoming the elongation rate of the toilet paper which concerns on this invention.

  On the other hand, the toilet roll according to the present invention winds up the above toilet paper base paper with a tension of a desired winding diameter and a winding length of 190 m or more, using a known winder equipment for manufacturing a toilet roll without a core. To produce a log, which is then cut and produced. In manufacturing the toilet roll according to the present invention, embossing is not performed.

  As described above, in order to confirm the effects of the toilet roll according to the present invention described in detail, the toilet roll without tube core according to the comparative example (Comparative Example 1 and Comparative Example 2) and the conventionally commercially available tube coreless toilet roll with a long winding length are available. Since comparison was made with (Conventional Product 1, Conventional Product 2, Conventional Product 3), the results are shown in Table 1 below.

[Reel diameter]
As for the winding diameter, the circumference of the roll was measured using a π gauge (Muratech KDS: dial meter rule F10-02DM). The value is an average of 5 measurements.
[Inner diameter]
The inner diameter was measured by applying a ruler to the core portion. The value is an average of 5 measurements.
[Products tsubo]
The product rice tsubo was measured according to JIS P 8124 (1998).
[Paper thickness]
The paper thickness was measured using a dial thickness gauge (thickness measuring instrument) “PEACOCK G type” (Ozaki Seisakusho) after conditioning the test piece under the conditions of JIS P 8111 (1998). The value is an average of 10 measurements.
Note that the specific procedure for measuring the paper thickness is to confirm that there is no dust or dust between the plunger and the measurement table, and then move the plunger on the measurement table and move the memory of the dial thickness gauge. Align the zero point, then raise the plunger and place the sample on the test bench, slowly lower the plunger perpendicular to the paper surface and read the gauge at that time. At this time, only the plunger is placed. The terminal of the plunger is made of metal so that a plane with a diameter of 10 mm is perpendicular to the plane of the paper, and the load at the time of measuring the paper thickness is about 70 gf.

[Dry tensile strength]
The dry tensile strength was measured according to the tensile test method of JIS P 8113 (1998). Among them, under the standard conditions defined in JIS P 8111 (1998), it was cut into a width of 25 mm in the vertical direction and the horizontal direction and measured. Measurement results are in cN / 25 mm units.

〔Growth rate〕
The elongation is specified in JIS P 8113 (2006). Definitions e) “Stretch at break”. This elongation percentage (%) was measured using “Universal Tensile Compression Tester TG-200N” manufactured by Minebea Co., Ltd.

[Softness]
The softness was measured according to the handle ohm method described in JIS L 1096 E method.
The test piece was 100 mm × 100 mm in size, and the clearance was measured at 5 mm. The value represents an average value of 5 times (10 times in total) in the vertical direction and the horizontal direction, with one decimal point. The unit is g.

[MMD]
MMD is the average deviation of the static friction coefficient. MMD is one of the indices of smoothness. The smaller the numerical value, the smoother, and the larger the numerical value, the less smooth.
In the MMD measurement method, tension is applied while the contact surface of the friction element is brought into contact with the surface of toilet paper, which is a measurement sample to which a tension of 20 g / cm is applied in a predetermined direction, with a contact pressure of 25 g. It is moved by 2 cm at a speed of 0.1 cm / s in substantially the same direction as the above direction.
The friction coefficient at this time is measured using a friction feeling tester (manufactured by Kato Tech Co., Ltd .: KES-SE), and the value obtained by dividing the integrated value of the friction coefficient by the friction distance (movement distance = 2 cm) is MMD. .
In addition, a friction element is used which has 20 piano wires P having a diameter of 0.5 mm adjacent to each other and has a contact surface formed so that the length and width are both 10 mm. The contact surface is formed with a unit bulging portion whose tip is formed of 20 piano wires P (curvature radius 0.25 mm).

[Water disintegration]
The water disintegration here is expressed by the number of seconds in the looseness test (based on the test method for looseness defined in JIS P 4501).

[Product density]
The density of the product is a value obtained by dividing the rice paper weight (C) of toilet paper conditioned under the conditions of JIS P 8111 by the paper thickness (D) of the toilet paper according to “PEACOCK G type”. The unit is g / cm ³ .

[Winding density]
It is a value obtained by dividing the winding length (m) by the roll cross-sectional area (m ² ). Roll cross-sectional area is the product diameter (winding diameter in the table) and tube core diameter (inner diameter in the table) as each circle, and the cross-sectional area obtained from the product diameter is subtracted by the cross-sectional area obtained from the tube core diameter. .

[Texture]
Softness and smoothness were comprehensively judged by sensory evaluation. Ten people were evaluated in three stages (×: 1 point, Δ: 2 points, ○: 3 points), and the average was taken. X: 0 or more and less than 1, Δ: 1 or more and less than 2, ○: 2 or more and less than 3.

[Ash content]
The ash content test method defined in JIS P 8251 (2003) was used. However, the treatment temperature was 600 ° C.

[Crepe rate]
The crepe rate is a value calculated from the following equation.
Crepe rate = ((peripheral speed of the dryer during paper manufacture) − (reel peripheral speed)) / (peripheral speed of the dryer during paper manufacture) × 100 (%)

Examples 1 to 3 according to the present invention have an outer shape that can use a JIS standard holder, but have a softness value smaller than that of the comparative example and the conventional example, tend to be low density, and have an excellent texture.
On the other hand, in Comparative Example 1, the paper thickness is increased. When it exceeds 90 μm, it becomes difficult to fit within the winding diameter of 120 mm of JIS standard. In addition, as the paper thickness increases, the softness value increases and the softness is insufficient.
Although the comparative example 2 was made into the external shape which can utilize the holder of a JIS specification, compared with an Example, there is little ash content and enlarged aspect ratio. In Comparative Example 2, the softness value was large and the softness was not sufficiently exhibited. The texture was also low.

  On the other hand, the conventional product 1 and the conventional product 2 can use JIS standard holders, but are 170 m winding products having a winding length longer than the conventional mainstream 100-130 products. These conventional products have a large softness value, and the result is that the softness is not sufficient. The texture was also low. Conventional products 1 and 2 have less ash than the range of the present invention and a large difference in aspect ratio. This is presumably because the strength in the vertical direction was increased in order to secure the winding during manufacture and the drawer during use while reducing the paper thickness. Since the conventional products 1 and 2 have a high basis weight and a low paper thickness, it is considered that some increase in density was attempted in order to compensate for a decrease in paper strength in the horizontal direction as the vertical direction was strengthened. As a result of the densification, it is presumed that softness and texture were reduced.

  On the other hand, the conventional product 3 is a product corresponding to 100 to 130 products which are conventionally mainstream. These conventional products have a large softness value as in the case of a 170-m roll product, and the result is that the softness is not sufficient. The texture is not as high as 170m, but it was low. When compared with the 170 m product, the result was evaluated as having a thickness.

  As described above, according to the present invention, there is no waste paper core that is excellent in softness, strength, and touch feeling, has a long winding length, and can be used for a toilet paper holder compliant with JIS standards and has a compact shape. Toilet rolls are provided.

  X1 ... toilet roll without tube core, 1 ... core portion of toilet roll without tube core, 2 ... toilet paper, L1 ... roll diameter of toilet roll, L2 ... roll width of toilet roll, L3 ... inner diameter of toilet roll.

Claims (3)

Toilet roll made from recycled paper is 190m or more, wound without a core, with a roll diameter of 100 to 118mm, a roll width of 105 to 116mm, and an inner diameter of 30 to 45mm.
The toilet paper contains a filler derived from waste paper, has an ash content of 3 to 10% by weight, is not calendered, has a paper thickness of 70 to 90 μm, and a density of 0.17 to 0 .21 g / cm ³ , elongation ratio of 6% to 9%, aspect ratio (length / width) of dry tensile strength of 3.5 or less, and softness of 2.34 to 2.91 g. Toilet roll without waste paper core. The dry tensile strength of the toilet paper, the machine direction 250 cN / 25 mm or more, lateral 70cN / 25mm or more, claim 1 paper tube coreless toilet rolls according. A method of manufacturing a waste paper coreless toilet roll in which toilet paper made from recycled paper is wound without a core,
Using a pulp raw material containing 95% by weight or more of waste paper pulp made from high-quality waste paper containing ash, the crepe rate in the creping doctor is 7 to 11%, and without performing a calendar process,
It contains a filler derived from the above-mentioned high-quality waste paper, has an ash content of 3 to 10% by weight, a paper thickness of 70 to 90 μm, a density of 0.17 to 0.21 g / cm ³ and an elongation of 6%. A toilet paper base paper having a dry tensile strength aspect ratio (length / width) of 3.5 or less and a softness of 2.34 to 2.91 g;
The toilet paper base paper is rolled over 190 m without a core to form a log having a winding diameter of 100 to 118 mm and an inner diameter of 30 to 45 mm.
Thereafter, the log is cut so that the roll width is 105 to 116 mm.
A method for producing a toilet roll without a core of used paper tube, characterized in that.

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