JP2011152426A - Method of manufacturing secondary whole roll for tissue paper product - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide tissue paper manufactured so as to be bulky without using bulking agents and the like and without increasing the number of manufacturing processes. <P>SOLUTION: A method of manufacturing secondary whole rolls for a tissue paper product includes: (1) a laminating step of laminating primary continuous sheets delivered from a plurality of primary whole rolls along the continuing direction and turning them to a laminated continuous sheet; (2) a chemical liquid applying step of applying chemical liquid only to one top layer side of the laminated continuous sheet or applying more chemical liquid to one top layer side than to the other top layer side; (3) a joining step of forming linear joint portions that prevent interlayer separation on the laminated continuous sheet; (4) a slitting step of slitting the laminated continuous sheet so as to have a width or a several-fold width of the tissue paper product; and (5) a coiling step of forming a plurality of secondary whole rolls having the width or the several-fold width of the tissue paper product by coaxially coiling the respective slit laminated continuous sheets. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a method for producing a secondary material roll for tissue paper products.

  In recent years, high-grade tissue paper that has been softened by containing a lotion chemical has been frequently used (Patent Document 1). As a method for applying a chemical solution to this sheet (base paper), application by a printing method such as immersion, spray application, flexo, gravure, etc. is employed. However, tissue paper is required to be bulky in order to improve its feeling of use, but tissue paper coated with lotion solution tends to stretch the crepe formed during paper making due to water absorption and moisture absorption of the paper. Therefore, the bulk is likely to decrease. Conventionally, bulking treatment is performed by a method such as adding a bulking agent composed of a cationic surfactant (Patent Document 2), internal addition of a drug such as water-absorbing water-retaining starch (Patent Document 3), or embossing (Patent Document 4). Has been done. However, these methods have problems such as difficulty in effect with paper having a low basis weight such as tissue paper, an increase in costs such as materials and equipment costs, and an increase in the number of manufacturing processes.

Japanese Patent Laid-Open No. 4-9121 JP 2006-161192 A Japanese Patent Laid-Open No. 2008-190050 JP 2009-34278 A

  There is provided a tissue paper containing a lotion chemical solution which is bulky and has a flexible feeling of use and high wiping performance without using a bulking agent or the like and without increasing the number of production steps. In addition, the time required for manufacturing the lotion chemical-containing tissue paper is shortened.

The present invention that has solved this problem is as follows.
[Invention of Claim 1]
A method for producing a secondary web roll for tissue paper products, wherein a plurality of secondary web rolls for tissue paper products are continuously produced from the primary web roll,
A lamination step in which a primary continuous sheet fed from a plurality of primary fabric rolls is laminated along the continuous direction to form a laminated continuous sheet;
Applying a chemical solution only on one surface layer side of the laminated continuous sheet, or applying a chemical solution with a larger application amount to one surface layer side than the other surface layer side, and
A bonding step for forming a line-shaped bonding portion for preventing delamination with respect to the laminated continuous sheet;
A slitting process for slitting the laminated continuous sheet so as to have a product width of tissue paper products or a multiple of the width,
Winding step of winding each slit continuous laminated sheet coaxially to form a plurality of secondary rolls of product width or multiple width of tissue paper products,
A method for producing a secondary material roll for tissue paper products.

(Function and effect)
The base paper constituting the tissue paper tends to extend particularly in the MD direction (length direction) due to water absorption. The elongation ratio varies depending on the crepe ratio of the base paper and the amount of water absorbed. In the present invention, after laminating two or more continuous sheets made of tissue paper, the chemical solution is applied only to one of the two continuous layer sheets forming the surface layer, or applied to the continuous two-layer sheet. A difference is provided in the amount of the chemical solution to be applied, and after application of the chemical solution, a joining portion is partially formed to fix the stack. As a result, since the continuous sheet coated with a large amount of the chemical solution extends from the other continuous sheet, wrinkles are generated on the surface, and this has the effect that the tissue paper becomes bulky. Even if the said chemical | medical solution is apply | coated by the said bulk processing, the web volume equivalent to the case where it processes without apply | coating a chemical | medical solution can be obtained.

The laminated continuous sheet after applying the chemical solution is wound while being slit after joining. By winding up in a roll shape, the surface of the surface continuous sheet coated with a large amount of the chemical solution comes into contact with the surface of the other continuous layer continuous sheet, so that the chemical solution penetrates (seasoning). This seasoning has the following effects. (A) At the same time as the lotion agent penetrates into the paper layer, the applied surface lotion agent is gradually transferred to the opposing surface. (B) The crepe paper has a property that it is difficult to return to the original state after it has been absorbed by moisture, water absorption and stretched, and the tendency is stronger as the crepe rate is higher, that is, as the stretch margin is larger. Accordingly, the elongation and wrinkle after the product of the sheet having a larger amount of water absorption and moisture absorption are larger and the waviness is larger.
The laminated continuous sheet to which the chemical solution is applied has the same composition as the chemical solution applied to the front and back sides in order to make the surface properties of the outer surface of the two front and back surfaces, that is, the surface in contact with the skin substantially the same.

[Invention of Claim 2]
The manufacturing method of the secondary raw material roll for tissue paper products of Claim 1 which apply | coats a chemical | medical solution so that the coating amount of both surface layers may be set to 1.5-5.0 g / m < ² >.

(Function and effect)
By making the chemical | medical solution to apply | coat to a regular quantity, bulky tissue paper products can be provided, keeping a basic weight low.

[Invention of Claim 3]
The method for producing a secondary raw roll for tissue paper products according to claim 1, wherein the chemical liquid has a moisture content of 1 to 15% and a viscosity of 1 to 700 mPa · s (40 ° C).

(Function and effect)
If the water content of the chemical solution is too high, the permeation rate is high, and it becomes difficult to provide a difference in the elongation of both sheets. On the other hand, if the moisture content of the chemical solution is too low, the elongation of the crepe due to coating is small, and it becomes difficult to provide a difference in the elongation of both sheets. Moreover, if the viscosity of the chemical solution is lower than the specified value, the chemical solution will immediately penetrate into other layers, making it difficult to make a difference in the elongation rate of each surface layer continuous sheet, as well as anilox roll during operation. Further, the chemical solution is likely to be scattered on a roll such as a printing plate roll or a gravure roll. On the other hand, when the viscosity of the chemical solution is higher than the specified value, it becomes difficult to uniformly apply the chemical solution in the width direction. In this way, by setting the chemical solution to the prescribed moisture content and viscosity, it is possible to produce a secondary raw roll having a wrinkled surface more reliably.

[Invention of Claim 4]
The method for producing a secondary raw roll for tissue paper products according to claim 1, wherein each of the chemical solutions is applied by a printing method, and the coating speed is 300 to 1200 m / min.

(Function and effect)
In the present invention, when a chemical solution is applied to a laminated continuous sheet, a series of steps can be performed without significantly reducing the paper strength by stacking and integrating immediately after applying the chemical solution. Therefore, it is possible to apply a chemical solution at a higher speed than before. By applying the chemical solution by a printing method such as flexo or gravure, the chemical solution can be applied evenly over the entire surface of one side of the laminated continuous sheet even at high speed. In particular, the chemical solution application step in the present invention is preferably performed in a ply machine.

[Invention of Claim 5]
2. The secondary for tissue paper products according to claim 1, wherein the basis weight of the laminated continuous sheet that has undergone the chemical solution coating step and the joining step is 10 to 25 g / m ² per ply, and the paper thickness is 110 to 180 μm with 2 plies. A method for producing a raw roll.

(Function and effect)
In the present invention, it is possible to increase the paper thickness compared to the basis weight, thereby providing a tissue paper product having a soft and soft texture.

[Invention of Claim 6]
A tissue paper product manufactured by the manufacturing method according to any one of claims 1 to 6.

By producing wrinkles in at least one ply of two or more ply tissue papers, a bulky processed tissue paper can be obtained regardless of the addition of a bulking agent or embossing. Moreover, since wrinkles are added and air is included between the plies, a soft and soft texture can be given. In particular, in tissue paper having wrinkles on the surface layer, the effect of improving the wiping performance by wrinkles and improving the diffusibility at the time of wiping by increasing the surface area can also be obtained.
Moreover, the chemical | medical solution application | coating process in this invention is integral with a ply process, and can be implemented at a faster speed than before.

It is a figure which shows the apparatus outline | summary of the ply process of the tissue paper which concerns on this invention. It is a flowchart which shows the outline | summary of the ply process of the tissue paper which concerns on this invention. It is a schematic diagram which shows the structure of the tissue paper which concerns on this invention. (A) MD direction sectional drawing before chemical | medical solution application | coating, (B) Top view before chemical | medical solution osmosis | permeation process, (C) II arrow directional view. It is a schematic diagram which shows the surface uneven | corrugated structure of the continuous sheet | seat of the tissue paper which concerns on this invention. (A) Before chemical solution application, (B) After chemical solution application. It is a schematic diagram which shows a chemical | medical solution penetration process. It is the schematic which shows an example of a multi stand type inter folder, and has shown the state seen from the front. It is the schematic which shows an example of a multi stand type inter folder, and has shown the state seen from the side. It is the schematic which shows an example of a multi stand type inter folder, and has shown the state seen from the front. It is a longitudinal cross-sectional view of the folded tissue paper. It is a principal part expansion perspective view of the site | part regarding a folding plate. It is a principal part expansion perspective view which shows how to fold a secondary continuous sheet (tissue paper). It is a principal part expansion perspective view which shows how to fold a secondary continuous sheet (tissue paper). It is a principal part expansion perspective view which shows how to fold a secondary continuous sheet (tissue paper). (B) It is a partially broken figure which shows a mode that the tissue paper accommodated in the storage box is taken out. It is a figure which shows the apparatus outline | summary of the ply process of the tissue paper which concerns on another form of this invention. It is a flowchart which shows the outline | summary of the ply process of the tissue paper which concerns on another form of this invention.

In the tissue paper according to the present invention, the winding direction of the original roll is defined as the MD direction or the longitudinal direction, and the direction perpendicular to the winding direction is defined as the CD direction or the lateral direction.
Embodiments of the present invention will be described in detail below with reference to the drawings. A method for manufacturing household tissue paper and a manufacturing facility thereof according to the present invention will be described below by taking a manufacturing method and facility of tissue paper containing a chemical solution as an example. In addition, this invention is applied not only to tissue paper but to toilet paper, kitchen paper, etc.
In FIG. 1, the outline | summary of the apparatus of the ply process of the tissue paper which concerns on this invention was shown. FIG. 2 shows the flow of the manufacturing process. 1 is preferably performed by a ply machine which is an integrated apparatus.

  In the manufacture of box-type tissue paper or the like, a base paper is made from pulp fibers using a known paper machine in a paper machine. Raw material pulp includes mechanical pulp such as ground wood pulp (GP), pressure-rise ground wood pulp (PGW), and thermomechanical pulp (TMP): semi-chemical pulp (SCP), high yield softwood unbleached kraft pulp (HNKP) Chemical pulps such as softwood bleached kraft pulp (NBKP), hardwood unbleached kraft pulp (HNKP), hardwood unbleached kraft pulp (LUKP), hardwood bleached kraft pulp (LBKP), etc .: deinking pulp (DIP), waste pulp (WP) ) And other used paper pulp. The raw material pulp can be used by selecting one kind or two or more kinds. Preferably, a chemical pulp containing no filler or foreign matter is preferred. NBKP: LBKP = 20: 80 to 80:20 is good, and NBKP: LBKP = 30: 70 to 60:40 is particularly desirable. Further, the raw material pulp may contain woody materials such as straw pulp, bamboo pulp, kenaf pulp, and herbs.

  On the other hand, in the papermaking raw materials, as other fiber raw materials, polyethylene terephthalate, polybutylene terephthalate, and polyester fibers such as copolymers thereof, polyolefin fibers such as polyethylene, polypropylene, and polystyrene, polyacrylonitrile, modacrylic, etc. Acrylic fibers, polyamide fibers such as nylon 6, nylon 66 and nylon 12, synthetic fibers such as polyvinyl alcohol fibers, polyvinylidene chloride fibers, polyvinyl chloride fibers and urethane fibers, semi-synthetic fibers such as triacetate fibers and diacetate fibers Include regenerated cellulose fibers such as viscose rayon, copper ammonia rayon, polynosic rayon, and lyocell, and chemical fibers such as regenerated fibers spun from collagen, alginic acid, and chitin. It is possible. The polymer constituting the chemical fiber may be in the form of a homopolymer, a modified polymer, a blend, a copolymer or the like.

The base paper produced by the paper machine is creped as a continuous sheet, calendered, and wound up to form primary rolls 11 and 12 (generally also called jumbo rolls). The The basis weight of the single continuous sheets 31 and 32 wound around the primary raw roll is 10 to 25 g / m ² , preferably 12 to 20 g / m ^2, and the paper thickness of the continuous sheets 31 and 32 is 2 plies. It is desirable that the thickness is 110 to 250 μm, preferably 130 to 200 μm in the stacked state.

  The crepe rate of the continuous sheets 31 and 32 is preferably 10 to 30%, more preferably 12 to 25%. Although the crepe rate of the continuous sheet 31 and the continuous sheet 32 may be the same, the crepe rate of one continuous sheet 31 is 2 to 10% (more preferably 2 to 5%) higher than the other continuous sheet 32. It is preferable to do. By increasing the crepe rate of a continuous sheet, which is coated with a large amount of chemical solution, of the two layers of surface layer continuous sheets, the difference in elongation between the surface layer continuous sheets when applying a chemical solution is increased, and wrinkles are more reliably observed. You can turn on.

  The continuous sheets 31 and 32 are laminated by the laminating roller 13 to form two plies, and if necessary, calendered by the ply machine calendar 14 and sent to the chemical solution coating process. Any known coating method such as dipping, spray coating, flexo coating, and gravure coating can be used as the chemical coating method, but printing such as gravure coating and flexo coating that performs uniform chemical coating on the entire coated surface is possible. Use of the method, particularly the use of a flexo coater equipped with a doctor chamber 15, is more preferable because the chemical solution can be supplied in a stable coating amount. In the ply process of FIG. 1, two flexo coaters 16 and 17 are provided, and a chemical solution is applied to each surface of a two-ply continuous sheet.

There is a difference in the chemical application amount of the two flexo coaters, or the chemical solution is applied only with one flexo coater. When making a difference in the crepe rate of the two-layer continuous sheet, it is preferable that more chemical solution is applied to the continuous sheet having the higher crepe rate (the continuous sheet 31 in the illustrated example). In the illustrated example, of the two coating facilities, the coating facility 16 that directly applies the chemical solution to the continuous sheet 31 applies more chemical solution than the other coating facility 17. The ratio of the coating amount of the chemical solution on both sides is 100: 0 to 60:40, preferably 75:25 to 60:40. The total amount of chemicals applied to both sides of the two plies is 1.5 to 5.0 g / m ² , preferably 2.0 to 4.0 g / m ² .

  About the chemical | medical solution to apply | coat, a viscosity shall be 1-700 mPa * s at 40 degreeC from a viewpoint of performing high-speed processing. More preferably, it is set to 50 to 400 mPa · s (40 ° C.). If it is less than 1 mPa · s, the chemical solution is likely to scatter on rolls such as anilox roll, printing plate roll, and gravure roll, and conversely if it is greater than 700 mPa · s, it is difficult to control the amount of application to each roll or continuous sheet. Ingredients include 70-90% polyol, 1-15% moisture, and 0.01-22% functional chemicals.

  Polyols include polyhydric alcohols such as glycerin, diglycerin, propylene glycol, 1,3-butylene glycol, polyethylene glycol, and derivatives thereof, and sugars such as sorbitol, glucose, xylitol, maltose, maltitol, mannitol, and trehalose.

  Functional agents include softeners, surfactants, inorganic and organic fine particle powders, oily components, and the like. Softeners and surfactants have the effect of imparting flexibility to the tissue and smoothing the surface, and anionic surfactants, cationic surfactants and zwitterionic surfactants are applied. Inorganic and organic fine particle powders have a smooth surface. The oil component has a function of improving lubricity, and higher alcohols such as liquid paraffin, cetanol, stearyl alcohol, and oleyl alcohol can be used.

  In addition, as a functional agent that helps or maintains the moisture retention of polyol, hydrophilic polymer gelling agent, collagen, hydrolyzed collagen, hydrolyzed keratin, hydrolyzed silk, hyaluronic acid or its salt, ceramide, etc. One or more humectants such as any combination can be added.

Deodorants such as flavors, emollients such as various natural extracts, vitamins, emulsifiers that stabilize compounding ingredients, antifoaming agents, antifungal agents, organic acids, etc. An agent can be appropriately blended. Furthermore, you may contain the antioxidant of vitamin C and vitamin E.
Of the above components, it is preferable to use a polyhydric alcohol such as glycerin or propylene glycol as a main component in order to stabilize the viscosity and coating amount of the chemical solution.
The temperature at the time of chemical solution application is preferably 30 ° C to 60 ° C, preferably 35 ° C to 55 ° C.

In the present invention, the lamination is preferably integrated 0.3 to 2.5 seconds after the last chemical application. If the time is less than 0.3 seconds, the chemical solution is not sufficiently absorbed by the base paper, so that the chemical solution adheres to the paper roll or the embossed roller roll to break the paper, or the respective rolls are contaminated. If the time exceeds 2.5 seconds, the continuous sheet coated with the chemical solution is stretched, so that even if it is fixed to another continuous sheet in the subsequent process, wrinkles are less likely to occur, making it difficult to obtain the desired effect. In addition, when the continuous sheet is fully stretched, there is no stretch that can cope with draw fluctuations, and the tensile strength is reduced due to moisture absorption and water absorption.
After the chemical solution is applied to the two-ply continuous sheet, the lamination is integrated within 0.3 to 2.5 seconds, preferably within 0.3 to 1.0 seconds. In the example of illustration, it is provided to the contact embossing roller 18 and the receiving roll 19, and is fixed by performing a contact embossing (knurling) process on the continuous sheet of 2 plies. At this time, the continuous sheet 32 with a small amount of chemical solution applied is disposed so as to contact the contact embossing roller 18. The contact embossing is preferably applied uniformly in the vertical direction with a width of 1 to 10 mm at positions of 1/10 to 1/20 with respect to the paper width from both sides. Any of the known methods such as fixing the ply with an adhesive may be used. However, when using an adhesive, there is a problem that the touch tends to become hard, and it is easy to peel off when applying a chemical solution. It can be said that the use of embossing is more preferable.

  The two-ply continuous sheet provided with contact embossing is cut into a product width by a slitter 20 and then taken up by a winding drum 21 to form a secondary raw roll 22. It is preferable that the secondary raw roll 22 wound up with a predetermined number of windings is allowed to stand at room temperature for 8 hours or more, and the penetration of the chemical coating agent into the paper layer and the transfer to the opposite surface are gradually performed.

  Conventionally, the chemical solution coating process has been performed by an off-machine coating equipment and the like, and the operation speed has been performed at 200 to 350 m / min. However, in the present invention, since it is necessary to integrate the layers immediately after the chemical solution coating, It is preferable to integrally perform a series of apparatuses for sheet lamination, chemical solution application, lamination integration, and winding. In this case, the operating speed of the apparatus may be equal to the conventional coating process speed, but it is preferable not to reduce the operating speed of other manufacturing processes. After application, the strength decreases due to water absorption and moisture absorption, and paper breakage is likely to occur. Therefore, the coating speed is 300 to 1200 m / min, more preferably 750 to 900 m so that lamination and fixing can be performed before water absorption and moisture absorption proceed. Desirable to do in / min. The tissue paper after chemical penetration is folded and stored in a paper box.

  An example of tissue paper according to this embodiment is shown in FIG. FIG. 3A is a cross-sectional view of a continuous sheet laminated on two plies before chemical application (cross-sectional view cut in parallel with the MD direction). In applying the chemical solution to both surfaces of the continuous sheet laminated on the two plies, a difference is provided in the amount of the chemical solution on both surfaces, and a large amount of the chemical solution is applied to the continuous sheet 31 side in the figure. After the chemical solution is applied, before the continuous sheet is fully extended, the lamination is integrated by the contact emboss 30 and cut to the product width by the slitter (FIG. 3B). Thereafter, the integrated ply is taken up and left to infiltrate the chemical solution (chemical solution infiltration step). From the lamination integration process to the chemical solution penetration process, the continuous sheets 31 and 32 coated with the chemical solution mainly extend in the MD direction. At that time, the continuous sheet 31 to which more chemical solution is applied has a higher elongation rate than the other continuous sheet 32. However, since both continuous sheets are fixed by contact embossing, Wrinkles are generated (FIG. 3C). If a difference is also provided in the crepe rate of the continuous sheets to be laminated and a base paper having a high crepe rate is used for the continuous sheet 31, it is possible to make a difference in the elongation rate between the continuous sheet 31 and the continuous sheet 32.

The crepe is formed by the difference between the dryer speed and the winding speed after the base paper is dried with a Yankee dryer and then peeled off from the dryer with a creping doctor. The shape of this crepe is adjusted by sticking the paper to the dryer, but there is some variation in this sticking and the fiber raw material is not evenly distributed. However, there are some variations in the crepe shape. This variation becomes more prominent as the crepe rate increases. The crepe rate is a value determined by the following formula. ◇
((Dryer peripheral speed during papermaking)-(Reel peripheral speed)) / (Dryer peripheral speed during papermaking) x 100

  Along with the variation of the crepe, there is also a variation in elongation when the chemical solution is applied, and this is formed as a three-dimensional fine wave. This wave does not become apparent during the seasoning of the original fabric because tension is applied, but it is restored and becomes apparent after processing and cutting into a product. The greater the amount of chemical applied to the sheet, the greater the crepe, the greater the change in the crepe shape, and the greater the corrugation of the sheet. Conversely, the smaller the amount of chemical applied to the sheet, the smaller the crepe, the smaller the crepe shape, The undulation is small. For this reason, a bulky effect can be made synergistic by changing not only the application amount but also the crepe rate.

  In addition, regarding the quality, when the continuous sheets 31 and 32 having different crepe rates are laminated to produce a product, the tissue paper as a product has a different bulk feeling unless the chemical solution is applied (FIG. 4 (A )). However, by applying more chemical solution to the continuous sheet 31 having a larger surface irregularity (high crepe rate), the continuous sheet 31 extends at a higher elongation rate than the continuous sheet 32. Since they are fixed in parallel (not shown), the continuous sheet 31 is waved and the bulk of the laminated sheet is increased. (FIG. 4B).

  There is a concern that the difference in the amount of chemical solution applied will cause a difference in the touch and feel on both sides of the product. However, before the secondary roll is subjected to the next process (folding, etc.) Since the surfaces of the continuous sheets 31 and 32 having different chemical application amounts are kept opposite to each other (chemical solution penetration step, FIG. 5), the chemical components between the continuous sheets are transferred little by little (in the drawing) Gray arrows), the differences are gradually reduced during seasoning. The white arrow in FIG. 5 indicates the penetration direction of the chemical component.

  The amount of water in the chemical solution is 1 to 15%, preferably 5 to 13%. When the water content of the chemical solution is less than 1% and is low, the elongation of the crepe immediately after application becomes small, and it is difficult to obtain the desired effect of increasing the bulk. On the other hand, when the amount of water in the chemical solution is higher than 15%, the drop in tensile strength and elongation during processing are large and the paper is easy to break, resulting in poor operability. Moreover, since the crepes of both sheets extend excessively, a desired bulk improvement effect cannot be obtained. The amount of water in the chemical solution to be applied is determined by the Karl Fischer method.

  After the two crepe papers that have been plyed and have different chemical application amounts are processed into products, the sheets sufficiently absorb moisture, so that the quality of both surfaces approaches uniformly. However, the elongation of the crepe and the wrinkles that have been generated once given moisture does not return to the original shape even when the moisture is reduced, leaving a certain difference in elongation, and producing a bulky effect after cutting the web.

Due to the bulky effect due to the wrinkles, for example, when the basis weight is about 10 to 13 g / m ² , the paper thickness per set is 110 to 180 μm, more preferably 120 to 170 μm, still more preferably 130 to 160 μm, and 180 sets The web bulk is preferably 50 to 68 mm, more preferably 55 to 65 mm.
In the illustrated example, a two-ply tissue paper is illustrated, but a three-ply tissue paper having one or more intermediate layers may be used.

The secondary raw roll described above is subjected to a folding process particularly in tissue paper products. As the folding process, a known method such as a rotary interfolder or a multi-stand interfolder can be used, but the use in a multi-stand interfolder with high productivity is more preferable.
A large number of secondary web rolls 22 are set in a multi-stand type interfolder, and a tissue paper bundle is manufactured by drawing out a secondary continuous sheet from the set secondary web roll 22 and folding and stacking them. Hereinafter, an example of the multi-stand type interfolder will be described.

  6 and 7 show an example of the multi-stand type interfolder. Reference numeral 2 in the drawing denotes secondary raw rolls 22, 22... Set on secondary raw roll support portions (not shown) of the multi-stand type interfolder 1. These secondary raw rolls 22, 22... Are set side by side in a direction (the horizontal direction in FIG. 6 and the front-to-back direction in FIG. 7) in which the required number is orthogonal to the plane of the drawing. Each secondary raw roll R has slits in the width of tissue paper product in the above-described manufacturing equipment and manufacturing method of the secondary raw roll for tissue paper products. It is wound and set in double width.

  The continuous belt-like secondary continuous sheets 63A and 63B unwound from the secondary raw roll 22 are guided by guide means such as guide rollers G1 and G1 and fed into the folding mechanism section 60. Further, as shown in FIG. 8, the folding mechanism unit 60 includes a folded plate group 64 in which a necessary number of folded plates P, P. For each folded plate P, guide rollers G2, G2 and guide round bar members G3, G3 for guiding a pair of continuous secondary continuous sheets 63A or 63B are respectively provided at appropriate positions. Further, below the folded plates P, P..., A conveyor 65 is provided that receives and conveys the laminated band 67 that is stacked while being folded.

  A folding mechanism using this type of folded plates P, P... Is a known mechanism, for example, from US Pat. As shown in FIG. 9, this type of folding mechanism folds each continuous secondary continuous sheet 63A, 63B... In the Z-shape and is adjacent to the adjacent secondary continuous sheets 63A, 63B. Stack the ends together.

  In FIG. 10 to FIG. 13, a part related to the folding plate P of the folding mechanism part 60 is shown in detail. In the folding mechanism 60, a pair of continuous secondary continuous sheets 63A and 63B are guided for each folded plate P. At this time, the continuous secondary continuous sheets 63A and 63B are guided by the guide round bar members G3 and G3 while being shifted in position so that the side end portions do not overlap each other.

  The continuous secondary continuous sheet that overlaps the lower side when guided by the folded plate P is the first continuous secondary continuous sheet 63A, and the continuous secondary continuous sheet that overlaps the upper side is the second continuous sheet. When the secondary continuous sheet 63B is used, these continuous secondary continuous sheets 63A and 63B are, as shown in FIGS. 9 and 11, second continuous secondary sheets 63A of the first continuous secondary continuous sheet 63A. The side edge e1 that does not overlap the sheet 63B is folded back to the upper side of the second continuous secondary continuous sheet 63B by the side plate P1 of the folded plate P, and as shown in FIGS. The side end portion e2 of the continuous secondary continuous sheet 63B that does not overlap the first continuous secondary continuous sheet 63A is folded downward so as to be drawn under the folded plate P from the slit P2 of the folded plate P. . At this time, as shown in FIGS. 9 and 13, the side end e3 (e1) of the continuous secondary continuous sheet 63A stacked while being folded in the upstream folded plate P is second from the slit P2 of the folded plate P. Are guided between the folded portions of the secondary continuous sheet 63B. In this way, each continuous secondary continuous sheet 63A, 63B... Is folded in a Z shape and the side ends of adjacent continuous secondary continuous sheets 63A and 63B are crossed together, so that the product is used. In some cases, when the top tissue paper is pulled out, the side edge of the next tissue paper is pulled out.

  As shown in FIG. 6, the laminated band 67 obtained by the multi-stand type interfolder 6 as described above is cut (cut) at a predetermined interval in the flow direction FL by the cutting means 66 at the subsequent stage, and the tissue is cut. As shown in FIG. 14A, the tissue paper bundle 67a is further stored in the storage box B in the subsequent equipment. In the multi-stand type interfolder 1 as described above, the paper direction of the laminated band 67 is the vertical direction (MD direction) along the flow direction FL, and is horizontal along the direction orthogonal to the flow direction. Direction (CD direction). For this reason, the direction of the paper of the tissue paper constituting the tissue paper bundle 67a obtained by cutting the laminated band 67 into a predetermined length is along the folding direction of the tissue paper as shown in FIG. The horizontal direction (CD direction) and the vertical direction (MD direction) along the direction orthogonal to the folding direction of the tissue paper.

  FIG. 14B shows an example of a product in which the tissue paper bundle 67a is stored in the storage box B. A perforation M is provided on the upper surface of the storage box B, and a part of the upper surface of the storage box B is broken by the perforation M so that the upper surface of the storage box B is opened. The opening is covered with a film F having a slit at the center, and the tissue paper T can be taken out through the slit provided in the film F.

  By the way, as described above, the direction of the paper of the tissue paper constituting the tissue paper bundle 67a is the horizontal direction (CD direction) along the folding direction of the tissue paper, so as shown in FIG. When the tissue paper T is pulled out from the storage box B, the pulling direction is along the horizontal direction (CD direction) of the tissue paper T.

  FIG. 15 shows an outline of an apparatus according to another embodiment of the present invention, and FIG. 16 shows a flowchart. In the form of FIG. 15, the laminated continuous sheet after chemical application and lamination integration is sent to the rotary interfolder 23, subjected to folding processing, and then cut to the product width.

A base paper and a chemical solution were produced under the following conditions, and a base paper elongation test (Test 1) and a tissue paper performance comparison test (Test 2) were performed.
〔Base paper〕
The pulp constituting the base paper was NBKP 50% and LBKP 50%. Further, the base paper before ply processing was used with a basis weight of 13.5 g / m ² per ply, a paper thickness of 150 μm with two plies stacked, and a crepe rate of 19%.
[Medical solution]
The chemical solution was prepared such that the viscosity was 300 mPa · s (40 ° C.).

[Performance comparison of tissue paper]
A performance test and a sensory test were performed on Examples 1 to 9 of the tissue paper according to the present invention and Comparative Examples. The structure of Examples 1-9 and a comparative example, the performance evaluation of tissue paper, and the result of sensory evaluation are as having shown in Table 1. The method of performance evaluation and sensory evaluation is as follows.
[Amount of application]
The coating amount was calculated from the difference between each sheet basis weight when the chemical solution after ply was not applied during operation and each sheet basis weight immediately after the corresponding application.
(Coating amount g / m ²⁾ = (basis weight g / m ² immediately after coating) - (the basis weight g / m ² in the case of not applying)
The coating amount of both surface layers or the total coating amount of both surfaces is the total coating amount per unit area of the plyed tissue paper sheet, and the coating amount of each sheet is added.

[Paper thickness]
It shall be measured using a dial thickness gauge (thickness measuring instrument) “PEACOCK G type” (Ozaki Seisakusho) under the conditions of JIS P 8111 (1998). Specifically, confirm that there is no dust or dust between the plunger and the measurement table, lower the plunger on the measurement table, move the memory of the dial thickness gauge to adjust the zero point, Raise the plunger, 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. The paper thickness is an average value obtained by measuring 10 times with 2 plies.

[Products tsubo]
It measured according to JIS P 8124 (1998). In the case of the two-ply tissue products in Table 1, the average US basis weight of the two-ply sheet is shown.
[Web bulk]
A plastic plate having a weight of 30 g and a size of 130 mm × 250 mm was placed on the tissue paper bundle, and the height of the four corners was averaged to obtain the web bulk.
[Softness]
It measured according to a handle ohm meter method (JIS L 1096E).
However, the test piece was 100 mm × 100 mm in size, and the clearance was 5 mm. The measurement was performed 5 times each in the longitudinal direction and the lateral direction with 1 ply, and the average value of all 10 times was represented by 2 digits of decimal point and expressed in units of cN / 100 mm.

〔sensory evaluation〕
The tissue papers according to Examples 1 and 2 and Comparative Examples 1 and 2 were subjected to sensory evaluation regarding softness and soft feeling. The sensory evaluation was carried out by 15 inspectors in a five-step evaluation, with a general-purpose tissue paper (“Erière tissue” 180 groups (made by Daio Paper)) not applied with a chemical solution being “3”. The evaluation criteria are as follows.
All the results of the erière tissue were set to 3. 5: Very good 4: Excellent 3: Equivalent to the standard 2: Inferior 1: The result of sensory evaluation significantly inferior is shown in Table 1.

  As shown in Table 1, when Examples 1-9, which are two-ply tissue paper, are compared with Comparative Examples, the paper thickness and web bulk are the same as in Examples 1-9, although the rice paper weight is almost the same. A high value was observed. Moreover, also in sensory evaluation, the Example exceeded the comparative example in a soft feeling. In particular, Examples 1 and 2 were found to have good flexibility (softness, softness) comparable to that of the Comparative Example while maintaining a high paper thickness and a soft feeling.

  INDUSTRIAL APPLICABILITY The present invention can be used not only in tissue paper used for home use, but also in any field that requires bulky thin paper such as industrial use or wiping of laboratory equipment.

  DESCRIPTION OF SYMBOLS 11,12 ... Jumbo roll, 13 ... Laminated roll, 14 ... Ply machine calendar, 15 ... Doctor chamber, 16, 17 ... Coating equipment, 18 ... Contact embossing roller, 19 ... Receiving roll, 20 ... Slitter, 21 ... Winding drum, 22 ... Ply original fabric roll, 30 ... Contact embossing, 31, 32 ... Continuous sheet.

Claims (6)

A method for producing a secondary web roll for tissue paper products, wherein a plurality of secondary web rolls for tissue paper products are continuously produced from the primary web roll,
A lamination step in which a primary continuous sheet fed from a plurality of primary fabric rolls is laminated along the continuous direction to form a laminated continuous sheet;
Applying a chemical solution only on one surface layer side of the laminated continuous sheet, or applying a chemical solution with a larger application amount to one surface layer side than the other surface layer side, and
A bonding step for forming a line-shaped bonding portion for preventing delamination with respect to the laminated continuous sheet;
A slitting process for slitting the laminated continuous sheet so as to have a product width of tissue paper products or a multiple of the width,
Winding step of winding each slit continuous laminated sheet coaxially to form a plurality of secondary rolls of product width or multiple width of tissue paper products,
A method for producing a secondary material roll for tissue paper products. The manufacturing method of the secondary raw material roll for tissue paper products of Claim 1 which apply | coats a chemical | medical solution so that the coating amount of both surface layers may be set to 1.5-5.0 g / m < ² >.   The method for producing a secondary raw roll for tissue paper products according to claim 1, wherein the chemical liquid has a moisture content of 1 to 15% and a viscosity of 1 to 700 mPa · s (40 ° C).   The method for producing a secondary raw roll for tissue paper products according to claim 1, wherein each of the chemical solutions is applied by a printing method, and the coating speed is 300 to 1200 m / min. 2. The secondary for tissue paper products according to claim 1, wherein the basis weight of the laminated continuous sheet that has undergone the chemical solution coating step and the joining step is 10 to 25 g / m ² per ply, and the paper thickness is 110 to 180 μm with 2 plies. A method for producing a raw roll.   A tissue paper product manufactured by the manufacturing method according to any one of claims 1 to 5.

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