JP2014045808A - Method for manufacturing kitchen paper roll - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a kitchen paper manufacturing method for preventing tail sealing failure.SOLUTION: When performing a tail seal, the kitchen paper manufacturing method employs, as an adhesive glue for sticking a tail to a winding part formed into a roll shape: a first adhesive that is formed by mixing a water-soluble polyvinyl alcohol-based adhesive with viscosity of 10,000-20,000 mPas at 30°C with a water-soluble adhesive based on a cellulose, a starch, an acrylic resin or a mixture thereof, with viscosity of 5-200 mPas at 30°C; and a second adhesive as a water-soluble adhesive based on polyethylene oxide, polyethyleneglycol or a mixture thereof, with viscosity of 2000-3000 mPas at 30°C.

Description

  TECHNICAL FIELD The present invention relates to a method for manufacturing a kitchen paper roll, and in particular, a tail that adheres a tail, which is a free end of a winding end portion of a roll, in which a strip-shaped kitchen paper raw material is wound into a tubular shape to a predetermined length, to the outer surface of the winding portion The present invention relates to a method for manufacturing a kitchen paper roll having a sealing step.

When manufacturing paper rolls made of rolls of crepe paper such as kitchen paper, paper towels, and toilet paper, the end of the roll is bonded to the take-up so that it cannot be unintentionally unwound from the end of the roll. Has been. This bonding is performed in the tail seal process in the process of manufacturing the paper roll.
On the other hand, among various crepe papers that are used as paper rolls, the kitchen paper is expected to be used as a lid for boiled foods, drip absorbents such as fresh fish, water drainers, and wipes around kitchens. It is required to have excellent properties (water absorption amount, water absorption rate).
For this reason, kitchen paper is thicker and thicker than toilet paper. And it has the characteristics that there are many compounding ratios of NBKP (conifer kraft pulp).
Further, kitchen paper often employs a structure in which two or more sheets provided with embossing are laminated to form two plies, and a gap is formed between the sheets to increase water absorption. When the blending ratio of NBKP in the raw material pulp is increased, there is an effect that embossing is firmly imparted, and this is one of the reasons for increasing the blending ratio of NBKP.

In this way, kitchen paper has a unique structure that it has a high rice floor area, thick paper thickness, excellent water absorption, high rigidity, and sometimes embossed, but such kitchen paper has a unique structure. Makes it difficult to bond in the tail seal process during manufacture.
That is, the tail seal process is performed such that adhesive glue is applied to the tail, which is a free end, and then the adhesive glue applied portion is brought into contact with the portion wound in a roll shape.

However, kitchen paper has a high basis weight and a large paper thickness, and is excellent in water absorption, so it may be absorbed by the paper when adhesive glue is applied to the tail, and the tail and roll-shaped winding part may be In some cases, it was not securely bonded. If the application amount of the adhesive paste is increased to improve this, the tail seal part may become hard or may be excessively adhered, and the tail seal part is difficult to peel off during use.
In addition, because the paper has high rigidity as described above, the kitchen paper is not maintained in a state where the tail is attached to the winding portion, but the tail and the roll-shaped winding portion are in contact with each other until they are sufficiently bonded. It is difficult to maintain the state.
For this reason, kitchen paper is required to absorb moisture such as moisture, and increasing its basis weight and paper thickness is an effective means for its improvement. It has been difficult to improve the absorption of moisture and the like due to an increase in paper thickness.

JP 2005-261736 JP2011-206369A

  Therefore, the main problem of the present invention is to prevent adhesion failure in the tail seal of the kitchen paper roll, to improve the yield at the time of manufacturing the kitchen paper roll, and to absorb the water absorption of the kitchen paper that can be used as a secondary for the kitchen paper roll. It is to improve the performance.

The present invention and effects obtained by solving the above problems are as follows.
<Invention of Claim 1>
A method of manufacturing a kitchen paper roll in which two-ply kitchen paper is wound into a roll,
When the tail-sealing was performed by winding the belt-shaped two-ply kitchen paper roll in a roll shape and bonding the tail, which is the end of the roll, to the rolled-up winding portion, the tail was rolled. As an adhesive paste to adhere to the winding part,
Cellulose-based, starch-based, acrylic resin-based or a mixture thereof, and a water-soluble adhesive having a viscosity at 30 ° C. of 5 to 200 mPas, a polyvinyl alcohol-based aqueous solution having a viscosity at 30 ° C. of 10,000 to 20000 mPas. A first adhesive mixed with an adhesive,
A polyethylene oxide-based, polyethylene glycol-based or a water-soluble adhesive obtained by mixing these, a second adhesive having a viscosity of 2000 to 3000 mPas at 30 ° C;
A method for producing a kitchen paper roll, characterized in that

<Invention of Claim 2>
Using the water-soluble adhesive having a solid content of 0.5 to 12% by weight,
Using a polyvinyl alcohol-based water-soluble adhesive having a solid content of 0.5 to 20% by weight,
The second adhesive having a solid content of 11 to 17% by weight is used.
The manufacturing method of the kitchen paper roll of Claim 1.

<Invention of Claim 3>
After applying the adhesive paste having a viscosity of 350 to 1200 mPas mixed with the first adhesive and the second adhesive along the width direction of the tail, the tail to which the adhesive paste is applied is brought into contact with the winding portion. The manufacturing method of the kitchen paper roll of Claim 1 or 2.

<Invention of Claim 4>
Apply a second adhesive along the width direction on the tip side of the tail,
The first adhesive is applied along the width direction on the winding start side with an interval of 0 to 30 mm more than that,
Thereafter, each adhesive application portion of the tail is brought into contact with the winding portion,
The manufacturing method of the kitchen paper roll of Claim 1 or 2.

<Invention of Claim 5>
5. The kitchen paper has a basis weight of 30 to 55 g / m ² per ply, and a thickness when five sets of two plies are stacked is 4.0 to 5.0 mm. 5. The manufacturing method of the kitchen paper roll of Claim 1.

(Function and effect)
The present invention relates to a cellulose-based adhesive, a starch-based adhesive, an acrylic resin-based adhesive as an adhesive paste used when performing a tail seal process performed in manufacturing a kitchen paper roll obtained by winding a two-ply kitchen paper into a roll. Or a water-soluble adhesive having a viscosity at 30 ° C. of 5 to 200 mPas, and a polyvinyl alcohol-based water-soluble adhesive having a viscosity at 30 ° C. of 10,000 to 20000 mPas. 1 adhesive and a polyethylene oxide adhesive, a polyethylene glycol adhesive, or a water-soluble adhesive obtained by mixing them, and a second adhesive having a viscosity of 2000 to 3000 mPas at 30 ° C. are used.

The first adhesive according to the present invention is a polyvinyl alcohol-based water-soluble adhesive having a predetermined viscosity relative to a cellulose-based adhesive having a predetermined viscosity, a starch-based adhesive, an acrylic resin-based adhesive, or an adhesive obtained by mixing these. It is blended and has high adhesive strength after drying. Since the adhesive strength after drying is high, the tail is prevented from being unintentionally peeled off after drying. However, since each adhesive constituting the first adhesive has low viscosity, it is difficult to maintain the contact state between the tail and the winding portion immediately after application.
Therefore, the present invention uses the second adhesive having a high adhesive strength when wet together with the first adhesive having a high adhesive strength when dried.
Since the second adhesive has a lower adhesive strength after drying than the first adhesive, it is difficult to prevent unintentional peeling after drying. However, the viscosity is high and the wet adhesive strength before drying is particularly high.
That is, in the manufacturing method of the kitchen paper roll of the present invention, the state in which the tail is brought into contact with the winding portion by the second adhesive is maintained, and both adhesives are effectively dried during that time, and the adhesive force when dry is obtained. Demonstrated. In particular, since the adhesive force of the first adhesive is exerted, the tail adheres to the winding portion, and unintended tail peeling is prevented.
Here, the second adhesive in the present invention is not only an action of simply pressing the sheet immediately after application due to high viscosity to the take-up portion, but also exerts an adhesive force during drying by gradually drying the second adhesive itself. To do.

  The present invention is not only a combination of an adhesive having a low wet adhesive force and a high dry adhesive force, and an adhesive having a high wet adhesive force and a low dry adhesive force, and a combination of predetermined adhesives. Thus, the initial adhesive force when wet, the late adhesive force when dry, and the increase in the adhesive strength of both adhesives accompanying the drying are appropriately made in the manufacture of kitchen paper rolls, the interaction of these adhesives, The contact state is maintained from the time when the tail to which the adhesive paste is applied and the winding portion are contacted to the time of drying, and after the adhesive paste is dried and bonded, an appropriate adhesive force is obtained. Thus, an unintended tail peeling is prevented, and a kitchen paper roll is produced in which only the tail portion is easily peeled when the tail is peeled off at the start of use.

Here, the adhesive paste is a water-soluble adhesive having a solid content of 0.5 to 12% by weight, particularly as the water-soluble adhesive according to the first adhesive, and the polyvinyl alcohol-based water-soluble adhesive has a solid content of 0.5. It is desirable to use ˜20% by weight and a second adhesive having a solid content of 11 to 17% by weight. The effect of this invention increases more by setting it as these combinations.
Further, in applying the adhesive paste to the tail, the adhesive paste is applied after applying an adhesive paste having a viscosity of 350 to 1200 mPas mixed with the first adhesive and the second adhesive along the width direction of the tail. It is desirable that the tail be in contact with the winding portion.
While being able to provide a 1st adhesive agent and a 2nd adhesive agent at once, those effect | actions can fully be acquired.

  On the other hand, the first adhesive and the second adhesive may be separately applied to the tail. In that case, the second adhesive is applied along the width direction on the tip side of the tail, and the first adhesive is applied along the width direction on the winding start side with an interval of 0 to 30 mm therebetween. Then, if the respective adhesive-applied portions of the tail are brought into contact with the winding portion, the effect of the present invention can be obtained.

Here, the present invention improves the adhesive strength when wet immediately after application of the adhesive paste, so that the kitchen paper can have a higher basis weight and a thicker paper thickness than before, and can be excellent in moisture absorption.
Specifically, the kitchen paper can have a basis weight of 30 to 55 g / m ² per ply and a thickness of 4.0 to 5.0 mm in which five sets of two plies are stacked.
According to the manufacturing method of the present invention, it is prevented that such kitchen paper is absorbed until it is dried after the adhesive paste is applied to the tail, thereby preventing poor adhesion. Moreover, even if the rigidity required for kitchen paper is increased by using the above-mentioned rice tsubo and paper thickness, it can sufficiently cope.

  As described above, according to the present invention, adhesion failure of the tail seal at the time of manufacturing kitchen paper is prevented, the yield at the time of manufacturing the kitchen paper roll is improved, and the kitchen paper that can be used for the kitchen paper roll as a subsidiary is added. Water absorption can be improved.

It is a perspective view of the kitchen paper roll which concerns on this invention. It is a top view which shows the embossing example suitable for the kitchen paper which concerns on this invention. It is a figure for demonstrating the example of a manufacturing method of the kitchen paper roll which concerns on this invention. It is a figure for demonstrating the example of paper tube manufacture concerning the embodiment of the present invention. It is a perspective view for demonstrating the aspect of the tail seal process which concerns on this invention. It is a perspective view for demonstrating the aspect of the other tail seal process which concerns on this invention.

  Next, an embodiment of the kitchen paper of the present invention will be described with reference to FIGS.

In the kitchen paper roll 1 according to the present embodiment, a two-ply kitchen paper 10 formed by laminating two strip-shaped crepe papers is wound around a paper tube 11 having substantially the same width as the paper width in the lateral direction. Forms a roll.
In the kitchen paper roll 1 according to the present invention, the winding end portion is bonded to the winding portion with adhesive glue, and thereby the winding end portion becomes unintentionally free before the start of use, so that it cannot be unwound. (The bonded portion is indicated by reference numeral 10s).
The dimensions and the like of the kitchen paper roll 1 are not necessarily limited, but preferably the paper tube diameter L1 is 30 to 50 mm, the outer diameter L2 is 90 to 130 mm, and the width L3 is about 100 to 250 mm. The winding length of 8.8-30m.
Moreover, the kitchen paper 10 which concerns on this form is provided with the perforation line over the kitchen paper sheet width direction as a preferable example at every predetermined space | interval of a sheet | seat longitudinal direction, and is easily cut | judged to a suitable magnitude | size. This predetermined interval is about 48 to 250 mm.

In order to manufacture the kitchen paper roll 10 of the present embodiment, the crepe paper is unwound at an appropriate speed from the raw roll obtained by winding the crepe paper relating to each ply made by a known technique in a paper machine, and the flow direction. A two-ply kitchen paper raw material is manufactured by laminating and winding up appropriately.
As the crepe paper, a known crepe paper obtained by making a papermaking raw material prepared by adding a chemical such as a wet paper strength agent or a dry paper strength agent to a raw material pulp using a crepe paper making technique can be used.
Although the raw material pulp is not particularly limited, it is preferable that only virgin pulp is used as a pulp raw material because kitchen paper is used for touching foods. ) Is preferable. The blending ratio (JIS P 8120) is preferably NBKP: LBKP = 60-90: 40-10. When NBKP is more, there is an advantage that embossing is more easily imparted, and the effect of improving liquid absorbency is easily exhibited.

Here, in the two-ply kitchen paper, a laminate form may be adopted in which embossing is imparted to each crepe paper, an adhesive is imparted to the embossed convex portions, and the embossed convex portions are opposed to each other.
The embossing can be performed by a known method which is performed simultaneously with the lamination integration of two plies. For example, after embossing is applied to each crepe paper using a steel rubber embossing device or the like, they may be laminated and integrated.
Laminated kitchen paper that has been bonded with embossing has the effect of improving the rigidity of the adhesive and increasing the surface roughness due to the embossing. Sealing problems are likely to occur.

In this invention, since the problem of a tail seal defect is improved, the embossing form preferable as a kitchen paper can be taken. Therefore, when embossing is imparted, it is desirable to impart embossing with excellent absorptivity because the present invention improves tail seal failure due to water absorption of the kitchen paper and surface irregularities.
In particular, the embossing with the following structure has a basis weight of 30 to 55 g / m ² and a high basis weight and a thick paper thickness such that the paper thickness when five sets of two plies are stacked is 4.0 to 5.0 mm. In this case, excellent water absorption is exhibited, but when combined with such high basis weight and thick paper thickness, it is extremely difficult to bond with the conventional tail seal, but according to the present invention, the tail seal is poor. Therefore, it is preferable to give an emboss having the following structure as the basis weight and paper thickness.

As shown in FIG. 2, the embossed structure has a flat top portion 12a. Particularly, the area of the top portion 12a is 0.5 to 40.0 mm ² , more preferably 0.75 to 4.0 mm ² . Is 1.0 to 2.0 mm ² . Moreover, the depth of embossing is 0.2-2.0 mm. The number of embosses 12 per unit area (emboss density) is 10 to 50 / cm ² .
Further, the embossed pattern is an embossed section X, X... In which a large number of the embossed 12, 12,... Are regularly formed, and a lattice pattern that intersects in a straight line with no emboss between the embossed sections X, X. This is an embossed pattern in which a punched pattern section Y is formed.

  In the punched pattern section Y, each layer is not bonded. In the embossed pattern provided with the embossed section X and the punched pattern section Y, moisture easily diffuses in the Z direction (which is also the depth direction and the paper layer direction) in the embossed section X, and moisture in the plane direction in the punched pattern section Y. It becomes easy to diffuse, has a good balance of moisture diffusivity in the Z direction and the plane direction, and has excellent liquid retention, liquid absorption, liquid retention, and liquid absorption speed.

The cut-out section Y may be a regular quadrangular lattice, a rectangular lattice, or an oblique lattice shape as long as it has a lattice shape. The length of one side of the grating is 1.731 to 50.0 mm, preferably 15.0 to 50.0 mm, and the width is 0.824 to 20.0 mm, preferably 1.2 to 5.0 mm. If the lattice length is excessively short, sufficient emulsification by the embossed section X cannot be obtained. On the other hand, if the lattice length is excessively long, sufficient diffusion in the plane direction by the punched section Y cannot be obtained. On the other hand, if the lattice width is excessively short, the extracted space is small, and the extracted space is saturated with liquid before diffusion, so that the liquid absorption speed cannot be obtained. On the other hand, if the lattice width is excessively long, each layer sticks at the pattern portion, so that the pattern space is not maintained and the liquid is not sufficiently diffused.
The area of the punched section Y is preferably 10.0 to 50.0%, particularly 20.0 to 30.0% of the area of the embossed section X.

The original kitchen paper manufactured by embossing as described above is transferred to the winder 100 shown in FIG. 3 to manufacture the log 1R. The log 1R is a general term in the industry, and is an intermediate product that has the same diameter as the kitchen paper roll and a width that is a multiple of the width of the kitchen paper roll or more. This is cut into a product width of the kitchen paper roll by a cutter means called a log cutter or a log saw which will be described later.
FIG. 3 shows a process (A), a log manufacturing process (B), and a cutting process (C) for manufacturing a long paper tube 11L used for log manufacturing. The part shown in (B) is the log manufacturing process in the winder. Here, the manufacturing process (A) of the long paper tube 11L will also be described.

  As shown in FIG. 4, the step of manufacturing the long paper tube 11L ((A) in FIG. 3) removes two strip-shaped paper tube base papers (paperboard) 15 and 15 from the raw fabric rolls 15A and 15A. While each is fed out, glue is applied to a predetermined position by a gluing roll 16, and the glued portion is overlapped and wound around a shaft 18 by a core winder 17 in a spiral shape to a predetermined length according to the width of the winder or the kitchen paper. Further, by cutting and aligning with the slitter 19, a cylindrical long paper tube 11L is formed. Each of the paper tube base papers 15 and 15 may use a different original fabric. For example, the paper tube base papers 15 and 15 may be printed on one side or may have different US basis weights. Also in the present invention, the paper tube base papers 15 and 15 are not necessarily the same. The diameter of the paper tube is 30-50 mm.

Next, the log 1R is manufactured by the winder 100 in parallel with or after the manufacturing of the long paper tube 11L.
The log 1R in the present embodiment is manufactured by continuously feeding the kitchen paper originals S1 and S1 from the rolls R and R wound around the kitchen paper original set on the raw roll support part of the winder 100, and the embossing process. After appropriately laminating two sheets in the flow direction to form a kitchen paper original fabric S2, a perforation line is formed along the width direction of the kitchen paper original fabric S2 at predetermined intervals in the flow direction by the perforation line providing means 70. Then, the log 1R is manufactured by being wound around the long paper tube 11L by the rewinding means 75 so as to have the winding diameter (product diameter) of the kitchen paper roll.

  The perforation line giving means 70 in the winder 100 is constituted by a so-called perforation roll 71 having a blade row in which a large number of blades are arranged along the axial direction on the peripheral surface, and a receiving roll 72 that makes a pair with this roll. When the kitchen paper original is passed between the perforation roll 71 and the receiving roll 72, the saw blade of the perforation roll 71 comes into contact with the kitchen paper original S2 to give a perforation line.

On the other hand, the winder 100 includes a shaft into which the long paper tube 11L manufactured in the long paper tube manufacturing process ((A) in FIG. 3) is inserted, a driving device that rotates the shaft, and a gluing device. In the log manufacturing 1R, first, a shaft is inserted into the long paper tube 11L, and pickup paste is appropriately applied to the outer surface of the paper tube into which the shaft is inserted.
Thereafter, the leading edge of the kitchen paper original S2 is bonded to the long paper tube 11L via the pickup glue, and then the shaft is driven to rotate, so that the kitchen paper original S2 is wound around the long paper tube 11L. .
Then, a predetermined length of kitchen paper S2 corresponding to the kitchen paper roll 1 is wound around the long paper tube 11L, and a plurality of winding diameters (diameters) corresponding to the kitchen paper roll 1 and the width of the kitchen paper roll are provided. After the roll of double width or more is formed, the rotational drive of the shaft is stopped, and the subsequent kitchen paper raw fabric S2 is cut.
A portion (also referred to as a tail) that becomes a free end by being separated from the subsequent kitchen paper raw material is bonded to the outer surface of the winding portion with adhesive glue. (The precursor of the log before tail adhesion is shown in FIGS. 5 and 6)

The adhesive paste is applied in a continuous line shape or a dotted line shape over the width direction of the kitchen paper raw fabric S2 as shown in FIG. 5 by a known tail sealer mechanism. Although the line width in that case is not limited, it is about 5-50 mm. The application amount may be the same as that when performing a known tail seal, and is specifically about 40 to 4,500 g / m ² .

  Here, the present invention is characterized in that cellulose-based, starch-based, acrylic resin-based, or these are used as the adhesive paste 40 used when performing tail sealing to bond the tail 20 to the rolled-up winding portion 30 A first adhesive obtained by mixing a water-soluble adhesive having a viscosity at 30 ° C. of 5 to 200 mPas with a polyvinyl alcohol-based water-soluble adhesive having a viscosity at 30 ° C. of 10,000 to 20000 mPas; A polyethylene oxide type, a polyethylene glycol type, or a water-soluble adhesive in which these are mixed, and a second adhesive having a viscosity of 2000 to 3000 mPas at 30 ° C. is used.

More preferable viscosity of the water-soluble adhesive is 10 to 30 MPas at 30 ° C., more preferable viscosity of the polyvinyl alcohol-based water-soluble adhesive is 13,000 to 17000 MPas at 30 ° C., and more preferable viscosity of the first adhesive is 30 ° C. 10 to 150 MPas. The more preferred viscosity of the second adhesive is 2500 to 2800 MPas at 30 ° C. In such a range, the effect is more certain.
In this invention, it can adjust using water suitably for the viscosity adjustment of each adhesive agent, and solid content adjustment.

In mixing the water-soluble adhesive and the polyvinyl alcohol-based water-soluble adhesive to form the first adhesive, the polyvinyl alcohol-based water-soluble adhesive having a viscosity range according to the present invention is water and the polyvinyl alcohol is in a volume ratio. : After diluting with water = 1: 4 to 3: 4 and adjusting the viscosity to 50 to 400 MPas at 30 ° C., the diluted polyvinyl alcohol water-soluble adhesive and water-soluble adhesive are in a volume ratio. Diluted polyvinyl alcohol-based water-soluble adhesive: water-soluble adhesive = 1: 3 to 5: 3.
In addition, the viscosity in this invention is measured by the viscosity measuring method (viscosity measuring method by a single cylinder type rotational viscosity system) of the liquid of JISZ8830.

On the other hand, in the present invention, particularly preferably, the water-soluble adhesive according to the first adhesive is cellulose-based, starch-based, the second adhesive is polyethylene oxide-based, polyethylene glycol-based, and particularly the water-soluble adhesive according to the first adhesive. The adhesive may be a combination of cellulose and the second adhesive may be a combination of polyethylene oxide. The effect which is good with this combination becomes more certain.
Here, examples of the cellulose-based water-soluble adhesive include carboxymethylcellulose, and examples of the starch-based water-soluble adhesive include potato starch paste, corn starch paste, and modified starch paste.
Further, as the polyethylene oxide and polyethylene glycol adhesives, those having a molecular weight of 50000 or more are suitable.

  The first adhesive desirably has a solid content of 0.5 to 12% by weight. More preferably, it is 1.0 to 8.0% by weight. It becomes easy to set it as the said viscosity, and the adhesiveness at the time of drying expresses especially favorable.

  The second adhesive desirably has a solid content of 11 to 17% by weight. More preferably, it is 5.0 to 15.0% by weight. It becomes preparation to set it as the said viscosity, and the adhesiveness at the time of the moistening just after provision will express especially favorable.

In the present invention, the first adhesive and the second adhesive can be mixed and used as a one-pack adhesive paste 40 as shown in FIG. In this case, the viscosity after mixing is desirably 350 to 1200 mPas. The applicability is good, and the effect of each adhesive is sufficiently exhibited. The mixing ratio of the first adhesive and the second adhesive is not necessarily limited, but preferably the first adhesive: second adhesive is in the volume ratio of 3: 7 to 9: 1.
When mixed and used as a one-component adhesive paste in this way, it is preferably applied in the range of 10 to 40 mm from the tail tip.

  On the other hand, the first adhesive and the second adhesive may be separately applied to the tail without being mixed as shown in FIG. In this case, the second adhesive 42 is applied along the width direction in a range of 10 to 40 mm from the tip 20T of the tail 20, and along the width direction toward the winding start side with an interval of 0 to 30 mm more than that. First adhesive 41 is applied. The 1st adhesive agent 41 and the 2nd adhesive agent 42 may be provided simultaneously, and may be provided separately.

After the tail seal is performed and the log 1R is manufactured by the winder 100, the log 1R is transferred to the log accumulator 101 continuously or intermittently.
The log accumulator 101 is a known device that transports the log 1R to the log cutter 102 at the subsequent stage while stocking a plurality of logs while moving the log 1R in the height direction and the horizontal direction. In the process of storage and movement, the adhesive paste is gradually dried and the tail is bonded to the winding portion.
The log 1 </ b> R sequentially transferred from the log accumulator 101 to the log cutter 102 is trimmed at both ends in the width direction as necessary, and is cut for each width of the kitchen paper roll 1 to become individual kitchen paper rolls 1. .
The log cutter 102 has a rotating round blade 76 arranged at a plurality of intervals so as to be in contact with the circumferential surface of the log 1R, and the log 1R is cut into the width of the kitchen paper roll 1 by the round blade.

  Thus, individual kitchen paper rolls 1 in which kitchen paper is wound around the paper tube 11 are manufactured.

  In addition, although the manufacture example of the said embodiment cuts the log which is an intermediate body, and finally makes it a kitchen paper roll, as a manufacturing method of this invention, the kitchen paper original fabric S1 is previously made into a kitchen, for example. The product width of the paper roll or slightly wider than that, the kitchen paper roll may be manufactured without passing through the log as an intermediate. The tail seal process in that case is the same as the case of manufacturing the log.

Here, the kitchen paper according to the present invention can have a basis weight of 30 to 55 g / m ² per ply in JIS P 8124. If it is in this range, a basic weight can be suitably made larger than a conventional product, and the absorptivity of kitchen paper can be improved.

  Moreover, the paper thickness in 5 sets of 2 plies can be 4.0 to 5.0 mm. If it is in this range, the paper thickness can be suitably increased as compared with conventional products, and the absorbability of kitchen paper can be increased.

  In addition, as a measuring method of paper thickness, it measures on condition of JISP8111 using the dial thickness gauge (thickness measuring device), for example, "PEACOCK measuring surface 30mmphi G type" (made by Ozaki Seisakusho). Specifically, confirm 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 adjust the zero point, and then Raise the plunger, place the sample on the test bench, slowly lower the plunger and read the gauge at that time. At this time, only the plunger is placed. The thickness is an average value obtained by performing measurement 10 times.

Next, Examples and Comparative Examples of the present invention were prepared and tested for tail seal failure. Two plies of kitchen paper according to each example were used, and the basis weight for one ply was 40 g / m ² , and the paper thickness in a 5-layer stack was 4.3 mm. The winder speed was 200 m / min.
The adhesive paste in the examples was a mixture of the first adhesive and the second adhesive. Water was used for viscosity adjustment.
The first adhesive is a cellulose-based water-soluble adhesive mainly composed of carboxymethyl cellulose (Sekisui Chemical Co., Ltd .: JW5620) and a polyvinyl alcohol-based water-soluble adhesive mainly composed of polyvinyl alcohol (Sekisui Chemical Co., Ltd.). : JW5609) and a viscosity adjusted to 18 MPas (30 ° C.) was used. The solid content of the water-soluble adhesive was 1.4% by weight. Moreover, the solid content rate of the polyvinyl alcohol-based water-soluble adhesive was 8.3% by weight.
As the second adhesive, a polyethylene oxide-based water-soluble adhesive (JW8371EN manufactured by Sekisui Chemical Co., Ltd.) mainly composed of polyethylene oxide was adjusted to a viscosity of 2698 MPas (30 ° C.). In addition, the solid content rate of this 2nd adhesive agent was 13.5 weight%.
As the conventional adhesive, two kinds of adhesives (Henkel Japan Co., Ltd. TVK974, 21AN615W) used as known tail seal pastes were used.
The viscosity of the adhesive paste was measured with a viscometer (DV-E manufactured by BROOK FIELD).
In the table, the wet adhesiveness was determined by visually checking whether or not the tail was peeled off by rolling the log 1 m 5 seconds after application of the adhesive paste.
The dry adhesiveness was determined by checking whether or not it was peeled off by its own weight when the kitchen glue roll was gripped and hung from the kitchen paper roll.
Regarding the wet adhesiveness, ◯ indicates that all of the prepared samples (three pieces) were not peeled off, and × indicates that even one piece was peeled off.
Regarding dry adhesiveness, the case where it was not peeled off was rated as ◯, and the case where it was peeled off was marked as x.
As for operability, the applicability such as generation of glue buds was evaluated.

  As shown in the table, the examples using the adhesive paste within the scope of the present invention are excellent in wet adhesiveness when applying the adhesive paste and dry adhesiveness after drying.

  On the other hand, in Comparative Examples 2 and 3 using conventional adhesives, although the viscosity of the adhesive paste itself is in the same range as the range of the present invention, there is a problem in wet adhesion and dry adhesion is insufficient As a result. In Comparative Example 1, the second adhesive is mixed with the conventional adhesive in order to improve the wet adhesive force. However, if the wet adhesive is sufficient, there will be a problem in the dry adhesiveness after drying. Became.

As described above, the tail seal defect is improved according to the present invention. Therefore, a kitchen paper roll can be manufactured efficiently and with a high yield.
In addition, a kitchen paper roll wound with kitchen paper having a high basis weight and a thick paper can be manufactured.

DESCRIPTION OF SYMBOLS 1 ... Kitchen paper roll, 10 ... Kitchen paper, 11 ... Paper tube, 10s ... Adhesion part, L1 ... Paper tube diameter, L2 ... Outer diameter of kitchen paper roll, L3 ... Width of kitchen paper roll 12 ... Emboss, 12a ... Emboss Top (embossed bottom)
DESCRIPTION OF SYMBOLS 100 ... Winder, 1R ... Log, 11 ... Long paper tube, 15 ... Paper tube base paper, 15A ... Paper tube base paper roll, 16 ... Glue roll, 17 ... Core winder, 18 ... Shaft, 19 ... Slitter, 70 ... Perforation line giving means, 75 ... rewinding means, 76 ... round blade, 71 ... perforation roll, 72 ... receiving roll, S1, S2 ... raw kitchen paper, 101 ... log accumulator, 102 ... log cutter 20 ... tail, 20T ... Tail tip, 30 ... Winding part, 40 ... Adhesive glue (adhesive glue application part), 41 ... First adhesive.

Claims (5)

A method of manufacturing a kitchen paper roll in which two-ply kitchen paper is wound into a roll,
When the tail-sealing was performed by winding the belt-shaped two-ply kitchen paper roll in a roll shape and bonding the tail, which is the end of the roll, to the rolled-up winding portion, the tail was rolled. As an adhesive paste to adhere to the winding part,
Cellulose-based, starch-based, acrylic resin-based or a mixture thereof, and a water-soluble adhesive having a viscosity at 30 ° C. of 5 to 200 mPas, a polyvinyl alcohol-based aqueous solution having a viscosity at 30 ° C. of 10,000 to 20000 mPas. A first adhesive mixed with an adhesive,
A polyethylene oxide-based, polyethylene glycol-based or a water-soluble adhesive obtained by mixing these, a second adhesive having a viscosity of 2000 to 3000 mPas at 30 ° C;
A method for producing a kitchen paper roll, characterized in that Using the water-soluble adhesive having a solid content of 0.5 to 12% by weight,
Using a polyvinyl alcohol-based water-soluble adhesive having a solid content of 0.5 to 20% by weight,
The second adhesive having a solid content of 11 to 17% by weight is used.
The manufacturing method of the kitchen paper roll of Claim 1.   After applying the adhesive paste having a viscosity of 350 to 1200 mPas mixed with the first adhesive and the second adhesive along the width direction of the tail, the tail to which the adhesive paste is applied is brought into contact with the winding portion. The manufacturing method of the kitchen paper roll of Claim 1 or 2. Apply a second adhesive along the width direction on the tip side of the tail,
The first adhesive is applied along the width direction on the winding start side with an interval of 0 to 30 mm more than that,
Thereafter, each adhesive application portion of the tail is brought into contact with the winding portion,
The manufacturing method of the kitchen paper roll of Claim 1 or 2. 5. The kitchen paper has a basis weight of 30 to 55 g / m ² per ply, and a thickness when five sets of two plies are stacked is 4.0 to 5.0 mm. 5. The manufacturing method of the kitchen paper roll of Claim 1.

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