JP2020072961A - Production method of tissue paper product - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a bulky tissue paper without using a bulky agent or the like and without increasing the number of manufacturing steps. SOLUTION: (1) A laminating step of laminating primary continuous sheets unwound from a plurality of primary raw fabric rolls along the continuous direction to form a laminated continuous sheet, (2) on one surface layer side of the laminated continuous sheet. Chemical solution application step of applying the chemical solution only or applying the chemical solution to one surface layer side with a larger amount than the other surface layer side, (3) A line-shaped joint portion that prevents delamination of the laminated continuous sheet. The joining process of forming the above, (4) the slitting process of slitting the laminated continuous sheet so as to have the product width of the tissue paper product or a plurality of times the width thereof, and (5) coaxially winding each of the slit laminated continuous sheets. A method for producing a secondary raw fabric roll for a tissue paper product, which comprises a winding step of forming a plurality of secondary raw fabric rolls having a product width or a plurality of times the width of the tissue paper product. [Selection diagram] Fig. 3

Description

  The present invention relates to a method for producing a tissue paper product containing a lotion drug solution.

In recent years, high-grade tissue paper, which has a soft feel by containing a lotion chemical, has been widely used (Patent Document 1). As a method of applying the chemical liquid to this sheet (base paper), dipping, spray application, application by a printing method such as flexo, gravure, etc. is adopted. However, tissue paper is required to be bulky in order to improve its usability, but tissue paper coated with lotion chemicals tends to stretch the crepe formed during papermaking due to water absorption and moisture absorption of the paper. Therefore, the bulk is likely to decrease.
Conventionally, in order to make paper bulky, internal addition of agents such as a bulking agent made of a cationic surfactant (Patent Document 2), water-absorbing water-soluble starch (Patent Document 3), or imparting embossing (Patent Document 4) The bulkiness treatment has been performed by such a method. However, these methods have problems that it is difficult to obtain effects on paper having a low tsubo, such as tissue paper, that the costs of materials and equipment increase, and that the number of manufacturing steps increases.

Japanese Unexamined Patent Publication No. 4-9121 JP, 2006-161192, A JP, 2008-190050, A JP, 2009-34278, A

  An object of the present invention is to provide a method for producing a tissue paper product which is bulky and has a soft feeling of use without using a bulking agent or the like and increasing the number of production steps.

The present invention which has solved this problem is as follows.
[Invention of Claim 1]
A plurality of secondary original rolls for tissue paper products, which are used by being set in a multi-stand type interfolder, are manufactured from a primary original roll having a crepe,
A large number of these secondary original rolls are set in a multi-stand type interfolder, and a continuous sheet is unwound from the set secondary original rolls, folded, and laminated to form a tissue paper bundle, with a predetermined interval. A method for manufacturing a tissue paper product by cutting and cutting, storing in a storage box in a predetermined number of sets,
A laminating step of laminating a primary continuous sheet fed from a plurality of primary material rolls along the continuous direction to form a laminated continuous sheet,
Chemical solution coating in which a chemical solution having a polyol is applied only to one surface layer side of a laminated continuous sheet which is not embossed, or a chemical solution having a polyol is applied to one surface layer side more than the other surface layer side. Process,
A winding step of coaxially winding a laminated continuous sheet to form a secondary original roll coated with the chemical liquid for the tissue paper product,
Have
A method for producing a tissue paper product, which comprises obtaining a tissue paper product having a paper thickness per set of 110 to 180 μm and a web bulk of 180 set standard of 50 to 68 mm.
Here, the paper thickness is measured using a dial thickness gauge (thickness measuring instrument) "PEACOCK G type" (Ozaki Seisakusho) under the conditions of JIS P 8111 (1998).
The web bulk is a value obtained by placing a plastic plate with a weight of 30 g and a size of 130 mm × 250 mm on a bundle of tissue paper and averaging the heights of the four corners.

(Effect)
The base paper constituting the tissue paper is particularly easy to stretch in the MD direction (length direction) due to water absorption. The elongation rate depends on the crepe rate of the base paper and the amount of water absorbed. In the present invention, after laminating two or more continuous sheets made of a base paper of tissue paper, the chemical solution is applied to only one of the two surface continuous sheets forming the surface layer, or the two continuous surface layers are applied. The difference is made in the amount of chemical solution to be used. As a result, a continuous sheet coated with a large amount of the chemical solution stretches more than the other continuous sheet, so that wrinkles are generated on the surface, and the wrinkles make the tissue paper bulky. Due to the bulkiness processing, even if the above-mentioned chemical solution is applied, it is possible to obtain the same web bulk as in the case where the bulk solution is processed without applying the chemical solution.

The laminated continuous sheet after applying the chemical solution is wound up. By winding in a roll shape, the surface of the continuous surface layer sheet coated with a large amount of the chemical solution comes into contact with the surface of the other surface layer continuous sheet, and the chemical solution penetrates (seasoning). This seasoning has the following effects. (A) At the same time that the lotion agent penetrates into the paper layer, the lotion agent on the coated surface is efficiently transferred gradually to the opposite surface. (B) The crepe paper has a property that it is difficult to return to the original state once it is stretched after absorbing moisture and water, and the higher the crepe rate, that is, the larger the stretch margin, the stronger the tendency. Therefore, the elongation and wrinkles of a sheet having a higher water absorption amount and a higher water absorption amount are larger, and waviness is larger.
Since the laminated continuous sheet coated with the chemical solution has substantially the same surface properties on the outer sides of the front and back two sheets, that is, the surface in contact with the skin, when the chemical solution is applied on the front and back sides, the chemical solution having the same composition is used.

[Invention of Claim 2]
The polyol is a polyhydric alcohol selected from the group of glycerin, diglycerin, propylene glycol, 1,3-butylene glycol, polyethylene glycol, and derivatives thereof, or sorbitol, glucose, xylitol, maltose, maltitol, mannitol, trehalose. The method for producing a tissue paper product according to claim 1, comprising a saccharide selected from the group.

[Invention of Claim 3]
The method for producing a tissue paper product according to claim 1, wherein the tissue paper product has a paper thickness per set of 120 to 160 μm, and a web bulk of 180 sets is 50 to 65 mm.

  By generating wrinkles in at least one ply of the two or more ply tissue paper, a bulky tissue paper can be obtained regardless of addition of a bulking agent or embossing. In addition, since wrinkles are added, air is included between the plies, so that a soft and soft texture can be provided.

It is a figure showing the device outline of the ply process of the tissue paper concerning the present invention. It is a flow figure showing the outline of the ply process of the tissue paper concerning the present 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, (B) Top view before a chemical | medical solution penetration process, (C) I-I arrow line view. It is a schematic diagram which shows the surface uneven structure of the continuous sheet | seat of the tissue paper which concerns on this invention. (A) Before application of the chemical solution, (B) After application of the chemical solution. It is a schematic diagram which shows a chemical liquid penetration process. It is the schematic which shows an example of a multi-stand type interfolder, and has shown the state seen from the front. It is the schematic which shows an example of the multi-stand type inter folder, and has shown the state seen from the side surface. It is the schematic which shows an example of a multi-stand type interfolder, 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 enlarged perspective view which shows how to fold a secondary continuous sheet (tissue paper). It is a principal part enlarged perspective view which shows how to fold a secondary continuous sheet (tissue paper). It is a principal part enlarged perspective view which shows how to fold a secondary continuous sheet (tissue paper). (B) It is a partially broken view showing how the tissue paper stored 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 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 original roll winding direction is the MD direction or the vertical direction, and the direction orthogonal to the winding direction is the CD direction or the horizontal direction.
Embodiments of the present invention will be described below in detail with reference to the drawings. A method for manufacturing household tissue paper and a manufacturing facility therefor according to the present invention will be described below by taking a manufacturing method and facility for tissue paper containing a chemical solution as an example.
FIG. 1 shows an outline of an apparatus of a tissue paper ply step according to the present invention. Moreover, the flow of the manufacturing process is shown in FIG. The process according to FIG. 1 is preferably performed by a ply machine which is an integrated device.

In manufacturing a box-type tissue paper or the like, a base paper is made from pulp fibers in a paper making machine using a known paper machine. As raw material pulp, groundwood pulp (GP), pressure-rise groundwood pulp (PGW), thermomechanical pulp (TMP) and other mechanical pulps: semi-chemical pulp (SCP), softwood high yield unbleached kraft pulp (HNKP) , Softwood bleached kraft pulp (NBKP), hardwood unbleached kraft pulp (HNKP), hardwood unbleached kraft pulp (LUKP), hardwood bleached kraft pulp (LBKP) and other chemical pulps: deinking pulp (DIP), waste pulp (WP) ) And other waste paper pulp. As the raw material pulp, one kind or two or more kinds can be selected and used.
Chemical pulp containing no filler or foreign matter is preferred. NBKP: LBKP = 20: 80 to 80:20 is preferable, and NBKP: LBKP = 30: 70 to 60:40 is particularly preferable. Further, the raw material pulp may include woods such as straw pulp, bamboo pulp, kenaf pulp, and herbs.

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

The raw paper made by the paper machine is creped as a continuous sheet, calendered, and then wound into primary rolls 11 and 12 (generally referred to as jumbo rolls). It The basis weight of the single continuous sheets 31 and 32 wound on the primary original fabric roll is 10 to 25 g / m ² , preferably 12 to 20 g / m ² , and the continuous sheets 31 and 32 have a thickness of 2 plies. It is desirable that the thickness is 110 to 250 μm, preferably 130 to 200 μm in a stacked state.

  The crepe ratio 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 higher than that of the other continuous sheet 32 by 2 to 10% (more preferably 2 to 5%). Preferably. By increasing the crepe rate of the continuous sheet with a large amount of the chemical solution applied, out of the two surface continuous sheets, the difference in the elongation rate during application of the chemical solution between the continuous surface layer sheets is increased, and wrinkles are more reliably generated. Can be turned on.

  The continuous sheets 31 and 32 are laminated by the laminating roller 13 into two plies, and if necessary, calendered by the ply machine calender 14 and sent to the chemical solution coating step. Any known coating method such as dipping, spray coating, flexographic coating or gravure coating can be used as the chemical coating method. However, printing such as gravure coating or flexographic coating is performed so that the coating solution is evenly coated on the entire coating surface. It is more preferable to use the method, in particular, the flexo coater equipped with the doctor chamber 15, since the chemical solution can be supplied in a stable coating amount. In the ply step of FIG. 1, two flexo coaters 16 and 17 are provided, and a chemical solution is applied to each surface of a continuous sheet of two plies. There is a difference in the amount of chemical solution applied between the two flexo coaters.

Alternatively, apply the chemical solution only with one flexo coater. When providing a difference in the crepe rate of the two-layer continuous sheet, it is preferable that more chemical solution be applied to the continuous sheet having the higher crepe rate (continuous sheet 31 in the illustrated example). In the illustrated example, it is assumed that, of the two coating equipments, the coating equipment 16 that directly applies the chemical liquid to the continuous sheet 31 applies more chemical liquid than the other coating equipment 17. The ratio of the applied amount of the chemical solution on both sides is 100: 0 to 60:40, preferably 75:25 to 60:40. The total amount of the chemical solution applied to both surfaces of the two-ply is 1.5 to 5.0 g / m ² , and preferably 2.0 to 4.0 g / m ² .

  The viscosity of the applied chemical liquid is 1 to 700 mPa · s at 40 ° C. from the viewpoint of high-speed processing. It is more preferably 50 to 400 mPa · s (40 ° C.). If it is less than 1 mPa · s, the chemical liquid is likely to be scattered on rolls such as anilox rolls, printing rolls and gravure rolls, while if it is more than 700 mPa · s, it becomes difficult to control the coating amount on each roll or continuous sheet.

The components of the chemical solution to be applied may contain 70 to 90% of polyol, 0.5 to 19% of water, and 0.01 to 22% of functional chemical. Polyols include polyhydric alcohols such as glycerin, diglycerin, propylene glycol, 1,3-butylene glycol, polyethylene glycol and their derivatives, and saccharides such as sorbitol, glucose, xylitol, maltose, maltitol, mannitol, trehalose.
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 drug solution.
The temperature at the time of applying the chemical solution is preferably 30 ° C to 60 ° C, more preferably 35 ° C to 55 ° C.

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

  Also, as a functional agent, a hydrophilic polymer gelling agent that assists or maintains the moisturizing property of polyol, collagen, hydrolyzed collagen, hydrolyzed keratin, hydrolyzed silk, hyaluronic acid or its salt, such as ceramide. One or more can be added in any combination.

  In addition, as functional agents, fragrances, emollients such as various natural extracts, vitamins, emulsifiers that stabilize compounding ingredients, defoaming agents that suppress the foaming of chemicals and stabilize application, deodorants such as mildew-proofing agents and organic acids. The agent can be appropriately mixed. Furthermore, vitamin C and vitamin E antioxidants may be contained.

In the present invention, it is preferable to integrate the layers 0.3 to 2.5 seconds after the last application of the chemical solution. If it 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 to break the paper or stains each of the rolls. When it exceeds 2.5 seconds, the continuous sheet coated with the chemical solution is excessively elongated, so that wrinkles are less likely to occur even if it is fixed to another continuous sheet in the subsequent step, and it is difficult to obtain the desired effect. In addition, when the continuous sheet is fully stretched, the stretchability that can cope with the draw fluctuation is lost, and the tensile strength is lowered due to moisture absorption and water absorption, so that there is a problem that paper breakage easily occurs and the operability is deteriorated.
In the illustrated example, the sheet is provided to the contact embossing roller 18 and the receiving roll 19, and fixed by performing contact embossing (knurling) treatment on a continuous sheet of two plies. At this time, the continuous sheet 32 having a small amount of applied chemical liquid is arranged so as to contact the contact embossing roller 18. It is preferable that the contact embossing is uniformly applied in the longitudinal direction at a position of 1/10 to 1/20 of the paper width from both sides with a width of 1 to 10 mm. Any of the known methods may be used, such as fixing the ply with an adhesive, etc., but when using an adhesive, there are problems such as hard touch to the skin, easy peeling off when applying a chemical solution, etc. It can be said that the use of embossing is more preferable.

  The two-ply continuous sheet provided with the contact emboss is cut into a product width by the slitter 20 and then wound up by the winding drum 21 into a secondary original roll 22. It is preferable that the secondary original fabric roll 22 wound up with a predetermined number of turns is allowed to stand at room temperature for 8 hours or more so that the chemical liquid coating agent gradually permeates into the paper layer and transfers to the opposite surface.

  Conventionally, the chemical coating process has been performed in an off-machine coating facility or the like, and the operating speed has been 200 to 350 m / min. However, a series of devices for laminating continuous sheets, coating chemicals, integrating and laminating, and winding up are required. It is preferable to carry out as one unit. 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 is lowered by water absorption and moisture absorption, and paper breakage is likely to occur. Therefore, the application speed is 300 to 1200 m / min, more preferably 750 to 900 m so that lamination fixing can be performed before water absorption and moisture absorption progress. It is desirable to do it in minutes. After passing through the chemical solution, the tissue paper is folded and stored in a paper box.

  An example of the 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 application of the chemical liquid (cross-sectional view cut in parallel to the MD direction). When applying the chemical liquid to both surfaces of the continuous sheet laminated in two plies, the chemical liquid amounts on both surfaces are made different, and a large amount of the chemical liquid is applied to the continuous sheet 31 side in the figure. After the chemical solution is applied and before the continuous sheet is fully stretched, the lamination is integrated by the contact embossing 30 and cut into a product width by a slitter (FIG. 3 (B)). After that, the integrated ply is wound up and left to stand still for permeating the chemical liquid (chemical liquid permeation step). From the lamination integration step to the chemical solution infiltration step, 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 a larger amount of the chemical solution is applied has a higher elongation rate than the other continuous sheet 32, but since both continuous sheets are fixed by contact embossing, the continuous sheet 31 on the surface that has been stretched further extends. Wrinkles occur (FIG. 3 (C)). By providing a difference in the crepe rate of the continuous sheets to be laminated and using a base paper having a high crepe rate for the continuous sheet 31, it is possible to further cause a difference in the extension rate between the continuous sheet 31 and the continuous sheet 32.

The crepe is formed by the difference between the winding speed and the dryer speed after the base paper is dried with a Yankee dryer and then peeled from the dryer with a creping doctor. The shape of this crepe is adjusted by sticking the paper to the dryer, but there are some variations in the sticking and the fiber material is not evenly distributed, so it is three-dimensional from a microscopic perspective. There are some variations in the crepe shape. This variation becomes more remarkable as the crepe rate increases. The crepe rate is a value calculated by the following formula.
((Drier peripheral speed during paper making)-(Reel peripheral speed)) / (Drier peripheral speed during paper making) x 100

  Along with the variation of the crepe, the variation when applying the chemical liquid also varies, and this is formed as a three-dimensional fine waviness. This waviness does not become apparent due to the tension acting during the original seasoning, but it becomes visible after being processed into a product and cut. The larger the amount of the chemical solution applied to the sheet, the larger the crepe, the greater the change in the crepe shape, and the greater the corrugation of the sheet. Conversely, the less the amount of the chemical solution applied to the sheet, the smaller the crepe, the change in the crepe shape. Rippling is small. Therefore, the bulkiness effect can be synergized by changing not only the coating amount but also the crepe ratio.

  Regarding quality, when the continuous sheets 31 and 32 having different crepe ratios are laminated to produce a product, the tissue paper as a product has different bulky feelings on both sides unless the chemical solution is applied (see FIG. )). However, by applying more chemical solution to the continuous sheet 31 having a larger surface irregularity (higher crepe rate), the continuous sheet 31 extends at a higher elongation rate than the continuous sheet 32, but the contact embossing causes the continuous sheet 31 to move in the MD direction. Since they are fixed in parallel (not shown), the continuous sheet 31 is corrugated, which increases the bulk of the laminated sheet. (FIG. 4 (B)).

  There is concern that the difference in the amount of chemical solution applied may cause the product to feel soft on both sides and the usability to differ, but the secondary roll may be left in a roll state before it is subjected to the next process (folding, etc.). By placing them, since the surfaces of the continuous sheets 31 and 32 having different amounts of applied chemicals are kept in a state of being opposed to each other (chemicals infiltration step, FIG. 5), the chemicals components between the continuous sheets are gradually transferred (in the figure). (Gray arrow), the difference is gradually reduced during seasoning. The white arrow in FIG. 5 shows the permeation direction of the chemical liquid component.

  The water content in the drug solution is 1 to 15%, preferably 5 to 13%. When the water content of the chemical solution is less than 1% and low, the elongation of the crepe immediately after coating becomes small, and it is difficult to obtain the desired effect of improving the bulk. On the other hand, when the water content in the chemical liquid exceeds 15% and is high, the tensile strength during processing is greatly reduced and the elongation is large, and the paper is easily cut, resulting in poor operability. Further, since the crepes of both sheets are excessively elongated, the desired effect of improving the bulk cannot be obtained. The amount of water in the applied chemical solution is determined by the Karl Fischer method.

  After the two crepe papers that have been plied and have different amounts of chemical solution applied to each other are processed into a product, the sheets absorb sufficient moisture, and the quality of both surfaces approaches uniform. However, the elongation of the crepe and the wrinkles caused by the moisture once applied do not return to the original shape even if the moisture is reduced, and some difference in elongation is left, and the bulkiness effect is produced after the web is cut.

Due to the bulkiness effect due to this wrinkle, the paper thickness per set is 110 to 180 μm, more preferably 120 to 170 μm, further preferably 130 to 160 μm, and the web bulk of 180 sets is 50 to 68 mm, more preferably 55 to 65 mm. Preferably.
In the illustrated example, two-ply tissue paper is illustrated, but three-ply tissue paper having one or more intermediate layers may be used.

The above-mentioned secondary original roll is subjected to a folding process, especially 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 it is more preferable to use a multi-stand interfolder having high productivity.
A large number of secondary original rolls 22 are set in a multi-stand type interfolder, and a secondary continuous sheet is unwound from the set secondary original rolls 22, folded, and laminated to manufacture a tissue paper bundle. Hereinafter, an example of the multi-stand type interfolder will be described.

  6 and 7 show an example of a multi-stand type interfolder. Reference numeral 2 in the figure denotes secondary original rolls 22, 22 ... Set on a secondary original roll supporting portion (not shown) of the multi-stand type interfolder 1. .. are set side by side in a direction (horizontal direction in FIG. 6, front-back direction in FIG. 7) orthogonal to the illustrated plane. Each secondary original roll R is provided with a slit in the tissue paper product width by the above-described secondary original roll manufacturing facility and manufacturing method for the tissue paper product, and has a multiple width of the tissue paper product, in the illustrated example. It is wound and set in double width.

  The continuous belt-shaped secondary continuous sheets 63A and 63B unwound from the secondary original fabric roll 22 are guided to the folding mechanism section 60 by being guided by the guide means such as the guide rollers G1 and G1. Further, the folding mechanism section 60 is provided with a folding plate group 64 in which a required number of folding plates P, P ... Are arranged side by side, as shown in FIG. For each folding 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 provided at appropriate positions. Further, below the folding plates P, P ..., A conveyor 65 that receives and conveys the laminated strips 67 that are stacked while being folded is provided.

  A folding mechanism using the folding plates P, P ... Of this type is a mechanism known from, for example, US Pat. No. 4,052,048. As shown in FIG. 9, this type of folding mechanism folds each continuous secondary continuous sheet 63A, 63B ... In a Z-shape, and at the side of the adjacent continuous secondary continuous sheets 63A, 63B. Stack while stacking the ends together.

  10 to 13 show in detail the portion of the folding mechanism section 60, particularly the folding plate P. In the folding mechanism section 60, a pair of continuous secondary continuous sheets 63A and 63B are guided to each folding 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 displaced from each other so that their side end portions do not overlap each other.

  The continuous secondary continuous sheet that is overlapped on the lower side when guided to the folding plate P is the first continuous secondary continuous sheet 63A, and the continuous secondary continuous sheet that is overlapped on the upper side is the second continuous sheet. 9B, the continuous secondary continuous sheets 63A and 63B are the secondary continuous secondary sheets 63A and 63B of the first continuous secondary continuous sheet 63A as shown in FIGS. 9 and 11. The side end portion 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 folding plate P, and as shown in FIGS. The side end e2 of the continuous secondary continuous sheet 63B, which does not overlap the first continuous secondary continuous sheet 63A, is folded back downward so as to be drawn below 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 portion e3 (e1) of the continuous secondary continuous sheet 63A that is stacked while being folded on the upstream folding plate P is moved from the slit P2 of the folding plate P to the second side. Is guided between the folded portions of the continuous secondary continuous sheet 63B. In this way, each continuous secondary continuous sheet 63A, 63B ... Is folded into a Z shape and the side edges of adjacent continuous secondary continuous sheets 63A and 63B are interlocked with each other. At some point, pulling out the top tissue paper will pull out the side edge of the next tissue paper.

  As shown in FIG. 6, the laminated strip 67 obtained by the multi-stand type interfolder 6 as described above is cut (cut) at predetermined intervals in the flow direction FL by the cutting means 66 in the subsequent stage, and then the tissue. A paper bundle 67a is formed, and as shown in FIG. 14A, the tissue paper bundle 67a is further stored in the storage box B in the downstream equipment. In the multi-stand type interfolder 1 as described above, the direction of the paper of the laminated strip 67 is the vertical direction (MD direction) along the flow direction FL and the horizontal direction 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. 14 (a). Becomes the horizontal direction (CD direction), and becomes 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 formed by storing the tissue paper bundle 67a in the storage box B. Perforations M are provided on the upper surface of the storage box B, and the upper surface of the storage box B is opened by breaking a part of the upper surface of the storage box B at the perforations M. The opening is covered with a film F having a slit in 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, since the paper direction of the tissue paper constituting the tissue paper bundle 67a is the lateral direction (CD direction) along the folding direction of the tissue paper, as shown in FIG. When the tissue paper T is pulled out from the storage box B, the pulling-out direction is along the lateral direction (CD direction) of the tissue paper T.

  An outline of an apparatus according to another embodiment of the present invention is shown in FIG. 15, and a flow chart is shown in FIG. In the embodiment shown in FIG. 15, the laminated continuous sheet after the application of the chemical solution and the lamination and integration is sent to the rotary interfolder 23, subjected to folding processing, and then cut into the product width.

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

[Comparison of tissue paper performance]
Performance tests and sensory tests were conducted on Examples 1 to 9 of the tissue paper according to the present invention and Comparative Examples. The results of the configurations of Examples 1 to 9 and the comparative example, the performance evaluation and the sensory evaluation of the tissue paper are as shown in Table 1. The methods of performance evaluation and sensory evaluation are as follows.
[Coating amount]
The coating amount was calculated from the difference between each sheet tsubo of the case where the chemical solution after ply was not applied during operation and the corresponding sheet tsubo of the sheet immediately after 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 ply 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 measuring table, lower the plunger on the measuring table, move the memory of the dial thickness gauge to align the zero point, and 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, just put the plunger. The terminal of the plunger is made of metal so that a flat surface having a diameter of 10 mm hits the plane of the paper perpendicularly, and the load when measuring the paper thickness is about 70 gf. The paper thickness is an average value obtained by measuring 10 times with 2 plies.

[Product tsubo]
It was measured according to JIS P 8124 (1998). In the case of the 2-ply tissue product in Table 1, the average tsubo of the 2-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 a bundle of tissue paper, and the heights of the four corners were averaged to obtain a web bulk.
[Softness (softness)]
It was measured according to the handle odometer method (JIS L 1096E).
However, the test piece had a size of 100 mm × 100 mm, and the clearance was 5 mm. Each ply was measured 5 times in the longitudinal direction and 5 times in the lateral direction, and the average value of all 10 times was represented by two decimal places and expressed in cN / 100 mm as a unit.

〔sensory evaluation〕
Sensory evaluations regarding softness and fluffiness were performed on the tissue papers of Examples and Comparative Examples. The sensory evaluation was carried out by 15 inspectors on a 5-point scale of "3" for general-purpose tissue paper ("Eriere Tissue" 180 sets (manufactured by Daio Paper Co., Ltd.)) which was not coated with the chemical solution. The evaluation criteria are as follows.
All of the results of Ellier Tissue are set to 5: Very excellent 4: Excellent 3: Equal to the standard 2: Inferior 1: Remarkably inferior The results of sensory evaluation are shown in Table 1.

  As shown in Table 1, when Examples 1 to 9 which are two-ply tissue papers are compared with Comparative Examples, the paper thickness and the web bulk are Examples 1 to 9 although the rice tsubo is almost the same. A high value was seen in. Further, also in the sensory evaluation, the results of the examples are higher than those of the comparative examples in terms of softness. In particular, it was found that Examples 1 and 2 have good flexibility (softness, softness) equivalent to that of Comparative Example while maintaining high paper thickness and soft feeling.

  INDUSTRIAL APPLICABILITY The present invention can be used not only in tissue paper used for home use but also in any field requiring bulky thin paper such as for industrial use, for cleaning physics and chemistry experimental equipment, and the like.

  11, 12 ... Jumbo roll, 13 ... Laminating roll, 14 ... Ply machine calendar, 15 ... Doctor chamber, 16, 17 ... Coating equipment, 18 ... Contact embossing roll, 19 ... Receiving roll, 20 ... Slitter, 21 ... Winding drum, 22 ... ply original roll, 30 ... contact embossing, 31, 32 ... continuous sheet.

  The present invention relates to a method for producing a tissue paper product containing a lotion drug solution.

In recent years, high-grade tissue paper, which has a soft feel by containing a lotion chemical, has been widely used (Patent Document 1). As a method of applying the chemical liquid to this sheet (base paper), dipping, spray application, application by a printing method such as flexo, gravure, etc. is adopted. However, tissue paper is required to be bulky in order to improve its usability, but tissue paper coated with lotion chemicals tends to stretch the crepe formed during papermaking due to water absorption and moisture absorption of the paper. Therefore, the bulk is likely to decrease.
Conventionally, in order to make paper bulky, internal addition of agents such as a bulking agent made of a cationic surfactant (Patent Document 2), water-absorbing water-soluble starch (Patent Document 3), or imparting embossing (Patent Document 4) The bulkiness treatment has been performed by such a method. However, these methods have problems that it is difficult to obtain effects on paper having a low tsubo, such as tissue paper, that the costs of materials and equipment increase, and that the number of manufacturing steps increases.

Japanese Unexamined Patent Publication No. 4-9121 JP, 2006-161192, A JP, 2008-190050, A JP, 2009-34278, A

An object of the present invention is to provide a method for producing a tissue paper product which is bulky and has a soft feeling of use.

The present invention which has solved this problem is as follows.
A plurality of secondary original rolls for tissue paper products, which are used by being set in a multi-stand type interfolder, are manufactured from a primary original roll having a crepe,
A large number of these secondary original rolls are set in a multi-stand type interfolder, and a continuous sheet is unwound from the set secondary original rolls, folded, and laminated to form a tissue paper bundle, with a predetermined interval. A method for manufacturing a tissue paper product by cutting and cutting, storing in a storage box in a predetermined number of sets,
A laminating step of laminating a primary continuous sheet fed from a plurality of primary material rolls along the continuous direction to form a laminated continuous sheet,
Chemical solution coating in which a chemical solution having a polyol is applied only to one surface layer side of a laminated continuous sheet which is not embossed, or a chemical solution having a polyol is applied to one surface layer side more than the other surface layer side. Process,
A winding step of coaxially winding a laminated continuous sheet to form a secondary original roll coated with the chemical liquid for the tissue paper product,
Including ,
The tissue paper product has a paper thickness per set of 120 to 160 μm .

(Effect)
The base paper constituting the tissue paper is particularly easy to stretch in the MD direction (length direction) due to water absorption. The elongation rate depends on the crepe rate of the base paper and the amount of water absorbed. In the present invention, after laminating two or more continuous sheets made of a base paper of tissue paper, the chemical solution is applied to only one of the two surface continuous sheets forming the surface layer, or the two continuous surface layers are applied. The difference is made in the amount of chemical solution to be used. As a result, a continuous sheet coated with a large amount of the chemical solution stretches more than the other continuous sheet, so that wrinkles are generated on the surface, and the wrinkles make the tissue paper bulky. Due to the bulkiness processing, even if the above-mentioned chemical solution is applied, it is possible to obtain the same web bulk as in the case where the bulk solution is processed without applying the chemical solution.

The laminated continuous sheet after applying the chemical solution is wound up. By winding in a roll shape, the surface of the continuous surface layer sheet coated with a large amount of the chemical solution comes into contact with the surface of the other surface layer continuous sheet, so that the chemical solution penetrates (seasoning). This seasoning has the following effects. (A) At the same time that the lotion agent penetrates into the paper layer, the lotion agent on the coated surface is efficiently transferred gradually to the opposite surface. (B) The crepe paper has a property that it is difficult to return to the original state once it is stretched after absorbing moisture and water, and the higher the crepe rate, that is, the larger the stretch margin, the stronger the tendency. Therefore, the elongation and wrinkles of a sheet having a higher water absorption amount and a higher water absorption amount are larger, and waviness is larger.
Since the laminated continuous sheet coated with the chemical solution has substantially the same surface properties on the outer sides of the front and back two sheets, that is, the surface in contact with the skin, when the chemical solution is applied on the front and back sides, the chemical solution having the same composition is used.

The polyol is a polyhydric alcohol selected from the group of glycerin, diglycerin, propylene glycol, 1,3-butylene glycol, polyethylene glycol, and derivatives thereof, or sorbitol, glucose, xylitol, maltose, maltitol, mannitol, trehalose. It may include a sugar selected from the group .

The tissue paper product may have a paper thickness per set of 120 to 160 μm.

It is possible to provide a method for producing a tissue paper product which is bulky and has a soft feeling of use.

It is a figure showing the device outline of the ply process of the tissue paper concerning the present invention. It is a flow figure showing the outline of the ply process of the tissue paper concerning the present 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, (B) Top view before a chemical | medical solution penetration process, (C) I-I arrow line view. It is a schematic diagram which shows the surface uneven structure of the continuous sheet | seat of the tissue paper which concerns on this invention. (A) Before application of the chemical solution, (B) After application of the chemical solution. It is a schematic diagram which shows a chemical liquid penetration process. It is the schematic which shows an example of a multi-stand type interfolder, and has shown the state seen from the front. It is the schematic which shows an example of the multi-stand type inter folder, and has shown the state seen from the side surface. It is the schematic which shows an example of a multi-stand type interfolder, 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 enlarged perspective view which shows how to fold a secondary continuous sheet (tissue paper). It is a principal part enlarged perspective view which shows how to fold a secondary continuous sheet (tissue paper). It is a principal part enlarged perspective view which shows how to fold a secondary continuous sheet (tissue paper). (B) It is a partially broken view showing how the tissue paper stored 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 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 original roll winding direction is the MD direction or the vertical direction, and the direction orthogonal to the winding direction is the CD direction or the horizontal direction.
Embodiments of the present invention will be described below in detail with reference to the drawings. A method for manufacturing household tissue paper and a manufacturing facility therefor according to the present invention will be described below by taking a manufacturing method and facility for tissue paper containing a chemical solution as an example.
FIG. 1 shows an outline of an apparatus of a tissue paper ply step according to the present invention. Moreover, the flow of the manufacturing process is shown in FIG. The process according to FIG. 1 is preferably performed by a ply machine which is an integrated device.

In manufacturing a box-type tissue paper or the like, a base paper is made from pulp fibers in a paper making machine using a known paper machine. As raw material pulp, groundwood pulp (GP), pressure-rise groundwood pulp (PGW), thermomechanical pulp (TMP) and other mechanical pulps: semi-chemical pulp (SCP), softwood high yield unbleached kraft pulp (HNKP) , Softwood bleached kraft pulp (NBKP), hardwood unbleached kraft pulp (HNKP), hardwood unbleached kraft pulp (LUKP), hardwood bleached kraft pulp (LBKP) and other chemical pulps: deinking pulp (DIP), waste pulp (WP) ) And other waste paper pulp. As the raw material pulp, one kind or two or more kinds can be selected and used.
Chemical pulp containing no filler or foreign matter is preferred. NBKP: LBKP = 20: 80 to 80:20 is preferable, and NBKP: LBKP = 30: 70 to 60:40 is particularly preferable. Further, the raw material pulp may include woods such as straw pulp, bamboo pulp, kenaf pulp, and herbs.

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

The raw paper made by the paper machine is creped as a continuous sheet, calendered, and then wound into primary rolls 11 and 12 (generally referred to as jumbo rolls). It The basis weight of the single continuous sheets 31 and 32 wound on the primary original fabric roll is 10 to 25 g / m ² , preferably 12 to 20 g / m ² , and the continuous sheets 31 and 32 have a thickness of 2 plies. It is desirable that the thickness is 110 to 250 μm, preferably 130 to 200 μm in a stacked state.

  The crepe ratio 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 higher than that of the other continuous sheet 32 by 2 to 10% (more preferably 2 to 5%). Preferably. By increasing the crepe rate of the continuous sheet with a large amount of the chemical solution applied, out of the two surface continuous sheets, the difference in the elongation rate during application of the chemical solution between the continuous surface layer sheets is increased, and wrinkles are more reliably generated. Can be turned on.

  The continuous sheets 31 and 32 are laminated by the laminating roller 13 into two plies, and if necessary, calendered by the ply machine calender 14 and sent to the chemical solution coating step. Any known coating method such as dipping, spray coating, flexographic coating or gravure coating can be used as the chemical coating method. However, printing such as gravure coating or flexographic coating is performed so that the coating solution is evenly coated on the entire coating surface. It is more preferable to use the method, in particular, the flexo coater equipped with the doctor chamber 15, since the chemical solution can be supplied in a stable coating amount. In the ply step of FIG. 1, two flexo coaters 16 and 17 are provided, and a chemical solution is applied to each surface of a continuous sheet of two plies. There is a difference in the amount of chemical solution applied between the two flexo coaters.

Alternatively, apply the chemical solution only with one flexo coater. When providing a difference in the crepe rate of the two-layer continuous sheet, it is preferable that more chemical solution be applied to the continuous sheet having the higher crepe rate (continuous sheet 31 in the illustrated example). In the illustrated example, it is assumed that, of the two coating equipments, the coating equipment 16 that directly applies the chemical liquid to the continuous sheet 31 applies more chemical liquid than the other coating equipment 17. The ratio of the applied amount of the chemical solution on both sides is 100: 0 to 60:40, preferably 75:25 to 60:40. The total amount of the chemical solution applied to both surfaces of the two-ply is 1.5 to 5.0 g / m ² , and preferably 2.0 to 4.0 g / m ² .

  The viscosity of the applied chemical liquid is 1 to 700 mPa · s at 40 ° C. from the viewpoint of high-speed processing. It is more preferably 50 to 400 mPa · s (40 ° C.). If it is less than 1 mPa · s, the chemical liquid is likely to be scattered on rolls such as anilox rolls, printing rolls and gravure rolls, while if it is more than 700 mPa · s, it becomes difficult to control the coating amount on each roll or continuous sheet.

The components of the chemical solution to be applied may contain 70 to 90% of polyol, 0.5 to 19% of water, and 0.01 to 22% of functional chemical. Polyols include polyhydric alcohols such as glycerin, diglycerin, propylene glycol, 1,3-butylene glycol, polyethylene glycol and their derivatives, saccharides such as sorbitol, glucose, xylitol, maltose, maltitol, mannitol, trehalose.
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 drug solution.
The temperature at the time of applying the chemical solution is preferably 30 ° C to 60 ° C, more preferably 35 ° C to 55 ° C.

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

  Also, as a functional agent, a hydrophilic polymer gelling agent that assists or maintains the moisturizing property of polyol, collagen, hydrolyzed collagen, hydrolyzed keratin, hydrolyzed silk, hyaluronic acid or its salt, such as ceramide. One or more can be added in any combination.

  In addition, as functional agents, fragrances, emollients such as various natural extracts, vitamins, emulsifiers that stabilize compounding ingredients, defoaming agents that suppress the foaming of chemicals and stabilize application, deodorants such as mildew-proofing agents and organic acids. The agent can be appropriately mixed. Furthermore, vitamin C and vitamin E antioxidants may be contained.

In the present invention, it is preferable to integrate the layers 0.3 to 2.5 seconds after the last application of the chemical solution. If it 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 to break the paper or stains each of the rolls. When it exceeds 2.5 seconds, the continuous sheet coated with the chemical solution is excessively elongated, so that wrinkles are less likely to occur even if it is fixed to another continuous sheet in the subsequent step, and it is difficult to obtain the desired effect. In addition, when the continuous sheet is fully stretched, the stretchability that can cope with the draw fluctuation is lost, and the tensile strength is lowered due to moisture absorption and water absorption, so that there is a problem that paper breakage easily occurs and the operability is deteriorated.
In the illustrated example, the sheet is provided to the contact embossing roller 18 and the receiving roll 19, and fixed by performing contact embossing (knurling) treatment on a continuous sheet of two plies. At this time, the continuous sheet 32 having a small amount of applied chemical liquid is arranged so as to contact the contact embossing roller 18. It is preferable that the contact embossing is uniformly applied in the longitudinal direction at a position of 1/10 to 1/20 of the paper width from both sides with a width of 1 to 10 mm. Any of the known methods may be used, such as fixing the ply with an adhesive, etc., but when using an adhesive, there are problems such as hard touch to the skin, easy peeling off when applying a chemical solution, etc. It can be said that the use of embossing is more preferable.

  The two-ply continuous sheet provided with the contact emboss is cut into a product width by the slitter 20 and then wound up by the winding drum 21 into a secondary original roll 22. It is preferable that the secondary original fabric roll 22 wound up with a predetermined number of turns is allowed to stand at room temperature for 8 hours or more so that the chemical liquid coating agent gradually permeates into the paper layer and transfers to the opposite surface.

  Conventionally, the chemical coating process has been performed in an off-machine coating facility or the like, and the operating speed has been 200 to 350 m / min. However, a series of devices for laminating continuous sheets, coating chemicals, integrating and laminating, and winding up are required. It is preferable to carry out as one unit. 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 is lowered by water absorption and moisture absorption, and paper breakage is likely to occur. Therefore, the application speed is 300 to 1200 m / min, more preferably 750 to 900 m so that lamination fixing can be performed before water absorption and moisture absorption progress. It is desirable to do it in minutes. After passing through the chemical solution, the tissue paper is folded and stored in a paper box.

  An example of the 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 application of the chemical liquid (cross-sectional view cut in parallel to the MD direction). When applying the chemical liquid to both surfaces of the continuous sheet laminated in two plies, the chemical liquid amounts on both surfaces are made different, and a large amount of the chemical liquid is applied to the continuous sheet 31 side in the figure. After the chemical solution is applied and before the continuous sheet is fully stretched, the lamination is integrated by the contact embossing 30 and cut into a product width by a slitter (FIG. 3 (B)). After that, the integrated ply is wound up and left to stand still for permeating the chemical liquid (chemical liquid permeation step). From the lamination integration step to the chemical solution infiltration step, 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 a larger amount of the chemical solution is applied has a higher elongation rate than the other continuous sheet 32, but since both continuous sheets are fixed by contact embossing, the continuous sheet 31 on the surface that has been stretched further extends. Wrinkles occur (FIG. 3 (C)). By providing a difference in the crepe rate of the continuous sheets to be laminated and using a base paper having a high crepe rate for the continuous sheet 31, it is possible to further cause a difference in the extension rate between the continuous sheet 31 and the continuous sheet 32.

The crepe is formed by the difference between the winding speed and the dryer speed after the base paper is dried with a Yankee dryer and then peeled from the dryer with a creping doctor. The shape of this crepe is adjusted by sticking the paper to the dryer, but there are some variations in the sticking and the fiber material is not evenly distributed, so it is three-dimensional from a microscopic perspective. There are some variations in the crepe shape. This variation becomes more remarkable as the crepe rate increases. The crepe rate is a value calculated by the following formula.
((Drier peripheral speed during paper making)-(Reel peripheral speed)) / (Drier peripheral speed during paper making) x 100

  Along with the variation of the crepe, the variation when applying the chemical liquid also varies, and this is formed as a three-dimensional fine waviness. This waviness does not become apparent due to the tension acting during the original seasoning, but it becomes visible after being processed into a product and cut. The larger the amount of the chemical solution applied to the sheet, the larger the crepe, the greater the change in the crepe shape, and the greater the corrugation of the sheet. Conversely, the less the amount of the chemical solution applied to the sheet, the smaller the crepe, the change in the crepe shape. Rippling is small. Therefore, the bulkiness effect can be synergized by changing not only the coating amount but also the crepe ratio.

  Regarding quality, when the continuous sheets 31 and 32 having different crepe ratios are laminated to produce a product, the tissue paper as a product has different bulky feelings on both sides unless the chemical solution is applied (see FIG. )). However, by applying more chemical solution to the continuous sheet 31 having a larger surface irregularity (higher crepe rate), the continuous sheet 31 extends at a higher elongation rate than the continuous sheet 32, but the contact embossing causes the continuous sheet 31 to move in the MD direction. Since they are fixed in parallel (not shown), the continuous sheet 31 is corrugated, which increases the bulk of the laminated sheet. (FIG. 4 (B)).

  There is concern that the difference in the amount of chemical solution applied may cause the product to feel soft on both sides and the usability to differ, but the secondary roll may be left in a roll state before it is subjected to the next process (folding, etc.). By placing them, since the surfaces of the continuous sheets 31 and 32 having different amounts of applied chemicals are kept in a state of being opposed to each other (chemicals infiltration step, FIG. 5), the chemicals components between the continuous sheets are gradually transferred (in the figure). (Gray arrow), the difference is gradually reduced during seasoning. The white arrow in FIG. 5 shows the permeation direction of the chemical liquid component.

  The water content in the drug solution is 1 to 15%, preferably 5 to 13%. When the water content of the chemical solution is less than 1% and low, the elongation of the crepe immediately after coating becomes small, and it is difficult to obtain the desired effect of improving the bulk. On the other hand, when the water content in the chemical liquid exceeds 15% and is high, the tensile strength during processing is greatly reduced and the elongation is large, and the paper is easily cut, resulting in poor operability. Further, since the crepes of both sheets are excessively elongated, the desired effect of improving the bulk cannot be obtained. The amount of water in the applied chemical solution is determined by the Karl Fischer method.

  After the two crepe papers that have been plied and have different amounts of chemical solution applied to each other are processed into a product, the sheets absorb sufficient moisture, and the quality of both surfaces approaches uniform. However, the elongation of the crepe and the wrinkles caused by the moisture once applied do not return to the original shape even if the moisture is reduced, and some difference in elongation is left, and the bulkiness effect is produced after the web is cut.

Due to the bulkiness effect due to this wrinkle, the paper thickness per set is 110 to 180 μm, more preferably 120 to 170 μm, further preferably 130 to 160 μm, and the web bulk of 180 sets is 50 to 68 mm, more preferably 55 to 65 mm. Preferably.
In the illustrated example, two-ply tissue paper is illustrated, but three-ply tissue paper having one or more intermediate layers may be used.

The above-mentioned secondary original roll is subjected to a folding process, especially 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 it is more preferable to use a multi-stand interfolder having high productivity.
A large number of secondary original rolls 22 are set in a multi-stand type interfolder, and a secondary continuous sheet is unwound from the set secondary original rolls 22, folded, and laminated to manufacture a tissue paper bundle. Hereinafter, an example of the multi-stand type interfolder will be described.

  6 and 7 show an example of a multi-stand type interfolder. Reference numeral 2 in the figure denotes secondary original rolls 22, 22 ... Set on a secondary original roll supporting portion (not shown) of the multi-stand type interfolder 1. .. are set side by side in a direction (horizontal direction in FIG. 6, front-back direction in FIG. 7) orthogonal to the illustrated plane. Each secondary original roll R is provided with a slit in the tissue paper product width by the above-described secondary original roll manufacturing facility and manufacturing method for the tissue paper product, and has a multiple width of the tissue paper product, in the illustrated example. It is wound and set in double width.

  The continuous belt-shaped secondary continuous sheets 63A and 63B unwound from the secondary original fabric roll 22 are guided to the folding mechanism section 60 by being guided by the guide means such as the guide rollers G1 and G1. Further, the folding mechanism section 60 is provided with a folding plate group 64 in which a required number of folding plates P, P ... Are arranged side by side, as shown in FIG. For each folding 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 provided at appropriate positions. Further, below the folding plates P, P ..., A conveyor 65 that receives and conveys the laminated strips 67 that are stacked while being folded is provided.

  A folding mechanism using the folding plates P, P ... Of this type is a mechanism known from, for example, US Pat. No. 4,052,048. As shown in FIG. 9, this type of folding mechanism folds each continuous secondary continuous sheet 63A, 63B ... In a Z-shape, and at the side of the adjacent continuous secondary continuous sheets 63A, 63B. Stack while stacking the ends together.

  10 to 13 show in detail the portion of the folding mechanism section 60, particularly the folding plate P. In the folding mechanism section 60, a pair of continuous secondary continuous sheets 63A and 63B are guided to each folding 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 displaced from each other so that their side end portions do not overlap each other.

  The continuous secondary continuous sheet that is overlapped on the lower side when guided to the folding plate P is the first continuous secondary continuous sheet 63A, and the continuous secondary continuous sheet that is overlapped on the upper side is the second continuous sheet. 9B, the continuous secondary continuous sheets 63A and 63B are the secondary continuous secondary sheets 63A and 63B of the first continuous secondary continuous sheet 63A as shown in FIGS. 9 and 11. The side end portion 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 folding plate P, and as shown in FIGS. The side end e2 of the continuous secondary continuous sheet 63B, which does not overlap the first continuous secondary continuous sheet 63A, is folded back downward so as to be drawn below 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 portion e3 (e1) of the continuous secondary continuous sheet 63A that is stacked while being folded on the upstream folding plate P is moved from the slit P2 of the folding plate P to the second side. Is guided between the folded portions of the continuous secondary continuous sheet 63B. In this way, each continuous secondary continuous sheet 63A, 63B ... Is folded into a Z shape and the side edges of adjacent continuous secondary continuous sheets 63A and 63B are interlocked with each other. At some point, pulling out the top tissue paper will pull out the side edge of the next tissue paper.

  As shown in FIG. 6, the laminated strip 67 obtained by the multi-stand type interfolder 6 as described above is cut (cut) at predetermined intervals in the flow direction FL by the cutting means 66 in the subsequent stage, and then the tissue. A paper bundle 67a is formed, and as shown in FIG. 14A, the tissue paper bundle 67a is further stored in the storage box B in the downstream equipment. In the multi-stand type interfolder 1 as described above, the direction of the paper of the laminated strip 67 is the vertical direction (MD direction) along the flow direction FL and the horizontal direction 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. 14 (a). Becomes the horizontal direction (CD direction), and becomes 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 formed by storing the tissue paper bundle 67a in the storage box B. Perforations M are provided on the upper surface of the storage box B, and the upper surface of the storage box B is opened by breaking a part of the upper surface of the storage box B at the perforations M. The opening is covered with a film F having a slit in 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, since the paper direction of the tissue paper constituting the tissue paper bundle 67a is the lateral direction (CD direction) along the folding direction of the tissue paper, as shown in FIG. When the tissue paper T is pulled out from the storage box B, the pulling-out direction is along the lateral direction (CD direction) of the tissue paper T.

  An outline of an apparatus according to another embodiment of the present invention is shown in FIG. 15, and a flow chart is shown in FIG. In the embodiment shown in FIG. 15, the laminated continuous sheet after the application of the chemical solution and the lamination and integration is sent to the rotary interfolder 23, subjected to folding processing, and then cut into the product width.

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

[Comparison of tissue paper performance]
Performance tests and sensory tests were conducted on Examples 1 to 9 of the tissue paper according to the present invention and Comparative Examples. The results of the configurations of Examples 1 to 9 and the comparative example, the performance evaluation and the sensory evaluation of the tissue paper are as shown in Table 1. The methods of performance evaluation and sensory evaluation are as follows.
[Coating amount]
The coating amount was calculated from the difference between each sheet tsubo of the case where the chemical solution after ply was not applied during operation and the corresponding sheet tsubo of the sheet immediately after 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 ply 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 measuring table, lower the plunger on the measuring table, move the memory of the dial thickness gauge to align the zero point, and 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, just put the plunger. The terminal of the plunger is made of metal so that a flat surface having a diameter of 10 mm hits the plane of the paper perpendicularly, and the load when measuring the paper thickness is about 70 gf. The paper thickness is an average value obtained by measuring 10 times with 2 plies.

[Product tsubo]
It was measured according to JIS P 8124 (1998). In the case of the 2-ply tissue product in Table 1, the average tsubo of the 2-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 a bundle of tissue paper, and the heights of the four corners were averaged to obtain a web bulk.
[Softness (softness)]
It was measured according to the handle odometer method (JIS L 1096E).
However, the test piece had a size of 100 mm × 100 mm, and the clearance was 5 mm. Each ply was measured 5 times in the longitudinal direction and 5 times in the lateral direction, and the average value of all 10 times was represented by two decimal places and expressed in cN / 100 mm as a unit.

〔sensory evaluation〕
Sensory evaluations regarding softness and fluffiness were performed on the tissue papers of Examples and Comparative Examples. The sensory evaluation was carried out by 15 inspectors on a 5-point scale of "3" for general-purpose tissue paper ("Eriere Tissue" 180 sets (manufactured by Daio Paper Co., Ltd.)) which was not coated with the chemical solution. The evaluation criteria are as follows.
All of the results of Ellier Tissue are set to 5: Very excellent 4: Excellent 3: Equal to the standard 2: Inferior 1: Remarkably inferior The results of sensory evaluation are shown in Table 1.

  As shown in Table 1, when Examples 1 to 9 which are two-ply tissue papers are compared with Comparative Examples, the paper thickness and the web bulk are Examples 1 to 9 although the rice tsubo is almost the same. A high value was seen in. Further, also in the sensory evaluation, the results of the examples are higher than those of the comparative examples in terms of softness. In particular, it was found that Examples 1 and 2 have good flexibility (softness, softness) equivalent to that of Comparative Example while maintaining high paper thickness and soft feeling.

  INDUSTRIAL APPLICABILITY The present invention can be used not only in tissue paper used for home use but also in any field requiring bulky thin paper such as for industrial use, for cleaning physics and chemistry experimental equipment, and the like.

  11, 12 ... Jumbo roll, 13 ... Laminating roll, 14 ... Ply machine calendar, 15 ... Doctor chamber, 16, 17 ... Coating equipment, 18 ... Contact embossing roll, 19 ... Receiving roll, 20 ... Slitter, 21 ... Winding drum, 22 ... ply original roll, 30 ... contact embossing, 31, 32 ... continuous sheet.

Claims (3)

A plurality of secondary original rolls for tissue paper products, which are used by being set in a multi-stand type interfolder, are manufactured from a primary original roll having a crepe,
A large number of these secondary original rolls are set in a multi-stand type interfolder, and a continuous sheet is unwound from the set secondary original rolls, folded, and laminated to form a tissue paper bundle, with a predetermined interval. A method for manufacturing a tissue paper product by cutting and cutting, storing in a storage box in a predetermined number of sets,
A laminating step of laminating a primary continuous sheet fed from a plurality of primary material rolls along the continuous direction to form a laminated continuous sheet,
Chemical solution coating in which a chemical solution having a polyol is applied only to one surface layer side of a laminated continuous sheet which is not embossed, or a chemical solution having a polyol is applied to one surface layer side more than the other surface layer side. Process,
A winding step of coaxially winding a laminated continuous sheet to form a secondary original roll coated with the chemical liquid for the tissue paper product,
Have
A method for producing a tissue paper product, which comprises obtaining a tissue paper product having a paper thickness per set of 110 to 180 μm and a web bulk of 180 set standard of 50 to 68 mm.
Here, the paper thickness is measured using a dial thickness gauge "PEACOCK G type" (Ozaki Seisakusho) under the conditions of JIS P 8111 (1998).
The web bulk is a value obtained by placing a plastic plate with a weight of 30 g and a size of 130 mm × 250 mm on a bundle of tissue paper and averaging the heights of the four corners. The polyol is a polyhydric alcohol selected from the group of glycerin, diglycerin, propylene glycol, 1,3-butylene glycol, polyethylene glycol, and derivatives thereof, or sorbitol, glucose, xylitol, maltose, maltitol, mannitol, trehalose. The method for producing a tissue paper product according to claim 1, comprising a saccharide selected from the group. The method for producing a tissue paper product according to claim 1, wherein the tissue paper product has a paper thickness per set of 120 to 160 μm, and a web bulk of 180 sets is 50 to 65 mm.

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