JP6857260B2 - How to make tissue paper products - Google Patents

Description

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

In recent years, high-grade type tissue paper, which is softened to the touch by containing a lotion chemical solution, has been widely used (Patent Document 1). As a method of applying the chemical solution to this sheet (base paper), a printing method such as dipping, spray coating, flexography, or gravure is adopted. However, although tissue paper is required to be bulky in order to improve its usability, tissue paper coated with lotion chemicals tends to stretch the crepe formed during papermaking due to the water absorption and moisture absorption of the paper. Therefore, the bulk tends to decrease.
Conventionally, in order to make paper bulky, a bulking agent made of a cationic surfactant (Patent Document 2), a chemical such as water-absorbing starch (Patent Document 3) is internally added, or embossing is applied (Patent Document 4). Bulky treatment has been performed by such a method. However, these methods have problems that it is difficult to obtain an effect on paper having a low paper density such as tissue paper, costs such as materials and equipment costs increase, and the number of manufacturing processes increases.

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

An object of the present invention is to provide a method for producing a tissue paper product that is bulky and exhibits a flexible usability.

The present invention that solves this problem is as follows.
From the primary rolls with crepes, we manufacture multiple secondary rolls for Tish paper products that are used by setting a large number in a multi-stand interfolder.
A large number of these secondary raw fabric rolls are set in a multi-stand type interfolder, and a continuous sheet is unwound from the set secondary raw fabric rolls, folded and laminated to form a tissue paper bundle at predetermined intervals. It is a manufacturing method that manufactures tissue paper products by cutting them and storing them in a storage box in a predetermined number of sets.
A laminating process in which primary continuous sheets unwound from a plurality of primary rolls are laminated along the continuous direction to form a laminated continuous sheet.
A chemical solution having a polyol is applied only to one surface layer side of a laminated continuous sheet that has not been embossed, or a chemical solution having a polyol is applied to one surface layer side with a larger amount than the other surface layer side. Process and
A winding process in which a laminated continuous sheet is coaxially wound to form a secondary raw fabric roll coated with a chemical solution for the Tish paper product, and a winding process.
Including
The tissue paper product is a method for producing a tissue paper product, characterized in that the paper thickness per set is 120 to 160 μm.

(Action effect)
The base paper constituting the tissue paper tends to be stretched particularly 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 to be 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 layers of surface continuous sheets forming the surface layer, or the chemical solution is applied to the two layers of surface continuous sheets. Make a difference in the amount of chemicals to be used. As a result, the continuous sheet coated with a large amount of the chemical solution is stretched from the other continuous sheet, so that the surface is wrinkled, and the wrinkles increase the bulkiness of the tissue paper. By the bulk processing, even if the above chemical solution is applied, the same web bulk as in the case of bulk processing without applying the chemical solution can be obtained.

The laminated continuous sheet after applying the chemical solution is wound up. By winding 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 surface continuous sheet, and the chemical solution permeates (seasoning). This seasoning has the following effects. (A) At the same time that the lotion agent permeates into the paper layer, the lotion agent on the applied surface gradually transfers to the opposite surface efficiently. (B) Crepe paper has the property that once it absorbs moisture and water and is stretched, it does not easily return to its original state, and the higher the crepe rate, that is, the larger the stretch margin, the stronger the tendency. Therefore, the elongation and wrinkles of the sheet having a larger amount of water absorption and moisture absorption after the product are larger, and the wrinkles are larger.
Since the laminated continuous sheet coated with the chemical solution has almost the same surface properties on the outside of the two front and back sheets, that is, the surface in contact with the skin, when the chemical solution is applied to the front and back surfaces, the chemical solution to be applied has the same composition.

The polyols are polyhydric alcohols 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 can contain sugars selected from the group.

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

It is possible to provide a method for manufacturing a tissue paper product that is bulky and exhibits a flexible usability.

It is a figure which shows the apparatus outline of the ply process of the tissue paper which concerns on this invention. It is a flow chart which shows the outline 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 view before chemical solution application, (B) top view before chemical solution permeation step, (C) I-I arrow view. It is a schematic diagram which shows the surface uneven structure of the continuous sheet of the tissue paper which concerns on this invention. (A) Before application of chemical solution, (B) After application of chemical solution. It is a schematic diagram which shows the chemical solution permeation process. It is a schematic diagram which shows an example of a multi-stand type interfolder, and shows the state seen from the front. It is a schematic diagram which shows an example of a multi-stand type interfolder, and shows the state seen from the side. It is a schematic diagram which shows an example of a multi-stand type interfolder, and shows the state seen from the front. It is a vertical sectional view of the folded tissue paper. It is an enlarged perspective view of a main part of a part related to a folded plate. It is an enlarged perspective view of a main part which shows how to fold a secondary continuous sheet (tish paper). It is an enlarged perspective view of a main part which shows how to fold a secondary continuous sheet (tish paper). It is an enlarged perspective view of a main part which shows how to fold a secondary continuous sheet (tish paper). (B) It is a partially broken view which shows the state of taking out the tissue paper stored in a storage box. It is a figure which shows the apparatus outline of the ply process of the tissue paper which concerns on another embodiment of this invention. It is a flow chart which shows the outline of the ply process of the tissue paper which concerns on another embodiment 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 in detail below with reference to the drawings. The method for producing household tissue paper and the equipment for producing the same according to the present invention will be described below by taking as an example the method and equipment for producing tissue paper containing a chemical solution.
FIG. 1 shows an outline of an apparatus for a ply process of tissue paper according to the present invention. In addition, FIG. 2 shows the flow of the manufacturing process. The process according to FIG. 1 is preferably carried out by a ply machine which is an integrated device.

In the production of boxed tissue paper and the like, a base paper is made from pulp fibers using a known paper machine in a paper making machine. As raw material pulp, mechanical pulp such as ground wood pulp (GP), pressure rised ground wood pulp (PGW), thermomechanical pulp (TMP): semi-chemical pulp (SCP), coniferous high yield unbleached kraft pulp (HNKP) , Coniferous bleached kraft pulp (NBKP), broadleaf unbleached kraft pulp (HNKP), broadleaf bleached kraft pulp (LUKP), broadleaf bleached kraft pulp (LBKP), etc. ) And other waste paper pulp. As the raw material pulp, one kind or two or more kinds can be selected and used.
Preferably, chemical pulp containing no filler or foreign matter is preferable. NBKP: LBKP = 20: 80 to 80:20 is preferable, and NBKP: LBKP = 30: 70 to 60:40 is particularly desirable. In addition, the raw material pulp may contain woody plants such as straw pulp, bamboo pulp, and kenaf pulp, and herbs.

On the other hand, among the raw materials for papermaking, as fiber raw materials other than the above, polyethylene terephthalate, polybutylene terephthalate, polyester fibers such as copolymers thereof, polyolefin fibers such as polyethylene, polypropylene, and polystyrene, polyacrylonitrile, modacryl, etc. Acrylic fiber, polyamide fiber such as nylon 6, nylon 66, nylon 12, polyvinyl alcohol fiber, polyvinylidene chloride fiber, polyvinyl chloride fiber, synthetic fiber such as urethane fiber, semi-synthetic fiber such as triacetate fiber and diacetate fiber. , Viscoa rayon, copper ammonia rayon, polynosic rayon, lyocell and other regenerated cell roll fibers, and synthetic fibers such as regenerated fibers spun from a solution of collagen, alginic acid, chitin, etc. can be included. 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 made by the paper machine is creped as a continuous sheet, calendered, and then wound up to form primary raw fabric rolls 11 and 12 (generally also called jumbo rolls). To. The basis weight of the single continuous sheets 31 and 32 wound on the primary 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 a stacked state.

The crepe ratio of the continuous sheets 31 and 32 is preferably 10 to 30%, more preferably 12 to 25%. The crepe rate of the continuous sheet 31 and the continuous sheet 32 may be the same, but the crepe rate of one continuous sheet 31 is 2 to 10% (more preferably 2 to 5%) higher than that of the other continuous sheet 32. It is preferable to do so. Of the two layers of surface continuous sheets, by making the crepe rate of the continuous sheet to which a large amount of chemical solution is applied higher than that of the other, the difference in the elongation rate when the chemical solution is applied between the surface layer continuous sheets is made larger, and wrinkles are more reliably performed. Can be attached.

The continuous sheets 31 and 32 are laminated by the laminating roller 13 to form two plies, and if necessary, they are calendar-processed by the ply machine calendar 14 and sent to the chemical solution application step. As the method of applying the chemical solution, any known coating method such as immersion, spray coating, flexographic coating, or gravure coating can be used, but printing such as gravure coating or flexographic coating in which the chemical solution is evenly applied to the entire coated surface. The use of the method, particularly the flexo coater provided with the doctor chamber 15, is more preferable because the chemical solution can be supplied in a stable coating amount. In the ply step of FIG. 1, two flexographic 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 amount of chemicals applied to the two flexo coaters.

Alternatively, apply the drug solution with only one flexo coater. When a difference is provided in the crepe ratios of the two layers of continuous sheets, it is preferable that a larger amount of the chemical solution is applied to the continuous sheet having the higher crepe ratio (continuous sheet 31 in the illustrated example). In the illustrated example, of the two coating equipments, the coating equipment 16 that directly applies the chemicals to the continuous sheet 31 is assumed to apply more chemicals than the other coating equipment 17. The ratio of the amount of the chemical solution applied 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 sides of the 2-ply ^{is 1.5 to 5.0 g / m 2} , preferably 2.0 to 4.0 g / m ² .

The viscosity of the chemical solution to be applied is 1 to 700 mPa · s at 40 ° C. from the viewpoint of high-speed processing. More preferably, it is 50 to 400 mPa · s (40 ° C.). If it is less than 1 mPa · s, the chemical solution tends to scatter on rolls such as anilox rolls, printing plate rolls, and gravure rolls, and conversely, if it is larger than 700 mPa · s, it becomes difficult to control the amount applied to 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 chemicals. The polyol includes 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.
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 applying the chemical solution is preferably 30 ° C to 60 ° C, preferably 35 ° C to 55 ° C.

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

In addition, as a functional agent, a hydrophilic polymer gelling agent, collagen, hydrolyzed collagen, hydrolyzed keratin, hydrolyzed silk, hyaluronic acid or a salt thereof, ceramide, etc. 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, defoamers that suppress foaming of chemicals and stabilize application, fungicides, deodorants of organic acids, etc. The agent can be appropriately blended. Furthermore, vitamin C and vitamin E antioxidants may be contained.

In the present invention, it is preferable to integrate the laminates 0.3 to 2.5 seconds after the final 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 roll to break the paper, or stains adhere to each of the rolls. If it exceeds 2.5 seconds, the continuous sheet coated with the chemical solution is stretched too much, so that wrinkles are less likely to occur even if it is fixed to another continuous sheet in the subsequent step, and it becomes difficult to obtain the desired effect. Further, when the continuous sheet is fully stretched, there is no stretch that can cope with the draw fluctuation, and since the tensile strength is lowered due to moisture absorption and water absorption, there is a problem that the paper is easily cut off and the operability is lowered.
In the illustrated example, the contact embossing roller 18 and the receiving roll 19 are provided, and the two-ply continuous sheet is fixed by being subjected to contact embossing (knurling) treatment. At this time, the continuous sheet 32 having a small amount of the chemical solution applied is arranged so as to come into contact with the contact embossing roller 18. It is preferable that the contact embossing is uniformly applied in the vertical direction with a width of 1 to 10 mm at a position 1/10 to 1/20 of the paper width from both sides. Any of the known methods may be used, such as fixing the ply with an adhesive, but when using an adhesive, there are problems such as the skin becoming hard to the touch and the ply being easily peeled off when the chemical solution is applied. It can be said that the use of embossing is more preferable.

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

Conventionally, the chemical solution coating process is performed in an off-machine coating facility or the like, and the operating speed is 200 to 350 m / min. However, a series of devices for continuous sheet laminating, chemical solution coating, laminating integration, and winding are used. It is preferable to perform it integrally. In this case, the operating speed of the apparatus may be the same as the conventional coating process speed, but it is preferable that the operating speed of other manufacturing processes is not reduced. After coating, the strength is reduced 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 laminating and fixing can be performed before water absorption and moisture absorption proceed. It is desirable to do it in / minute. After the chemical solution has penetrated, 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 solution (cross-sectional view cut in parallel with the MD direction). When applying the chemical solution to both sides of the continuous sheet laminated on the two plies, a difference is provided in the amount of the chemical solution on both sides, and a large amount of the chemical solution is applied to the side of the continuous sheet 31 in the drawing. After the chemical solution is applied and before the continuous sheet is fully stretched, the laminates are integrated by the contact emboss 30 and cut to the product width by the slitter (FIG. 3 (B)). After that, the integrated ply is wound up and allowed to stand in order to allow the chemical solution to permeate (chemical solution permeation step). From the laminating integration step to the chemical solution permeation step, the continuous sheets 31 and 32 coated with the chemical solution extend mainly in the MD direction. At that time, the continuous sheet 31 coated with more chemical solution has a higher elongation rate than the other continuous sheet 32, but since both continuous sheets are fixed by contact embossing, the surface of the more elongated continuous sheet 31 is covered. Wrinkles occur (Fig. 3 (C)). If a difference is 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, a difference can be caused in the elongation 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 by a Yankee dryer and then peeled off from the dryer by a crepe doctor. The shape of this crepe is adjusted by sticking paper to the dryer, but because there is some variation in this sticking and the fiber raw materials are not evenly distributed, it is three-dimensional when viewed from a microscopic perspective. There is some variation in the crepe shape. This variation becomes more pronounced as the crepe rate increases. The crepe rate is a value calculated by the following formula.
((Peripheral speed of dryer during papermaking)-(Peripheral speed of reel)) / (Peripheral speed of dryer during papermaking) x 100

Along with the variation in the crepe, the elongation when the chemical solution is applied also varies, and this is formed as three-dimensional fine waviness. This wave does not become apparent during the seasoning of the original fabric because tension acts, but it is restored and becomes apparent after being processed into a product and cut. The larger the amount of chemical solution applied to the sheet, the larger the crepe, the greater the change in crepe shape, and the greater the waviness of the sheet. Conversely, the smaller the amount of chemical solution applied to the sheet, the smaller the crepe shape, the greater the change in crepe shape. The waviness is small. Therefore, the bulky effect can be synergized by changing not only the coating amount but also the crepe rate.

Regarding the quality, when continuous sheets 31 and 32 having different crepe ratios are laminated and commercialized, the product tissue paper has a different bulk feeling on both sides unless the chemical solution is applied (FIG. 4 (A). )). However, by applying more chemical solution to the continuous sheet 31 having a larger surface unevenness (high crepe rate), the continuous sheet 31 stretches at a higher elongation rate than the continuous sheet 32, but the contact embossing causes the continuous sheet 31 to extend in the MD direction. Since they are fixed in parallel (not shown), the continuous sheet 31 is wavy and the bulk of the laminated sheet increases. (Fig. 4 (B)).

There is a concern that the feel and usability may differ on both sides of the product due to the difference in the amount of chemicals applied, but before the secondary raw fabric roll is subjected to the next process (folding, etc.), it is still in the rolled state. By placing the sheets, the surfaces of the continuous sheets 31 and 32 having different amounts of the chemical solution applied are kept facing each other (chemical solution permeation step, FIG. 5), so that the chemical solution components between the continuous sheets are gradually transferred (in the figure). Gray arrow), the difference is gradually reduced during seasoning. The white arrows in FIG. 5 indicate the permeation direction of the chemical component.

The water content 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 low, the elongation of the crepe immediately after application 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 solution is higher than 15%, the tensile strength during processing is significantly reduced and the elongation is large, and the paper is easily cut off, resulting in poor operability. Further, since the crepes of both sheets are excessively stretched, the desired effect of improving the bulk cannot be obtained. The amount of water in the chemical solution to be applied shall be determined by the Karl Fischer method.

The two crepe papers that are plyed and have different amounts of chemicals applied to each other are processed into products, and then the sheets absorb sufficient moisture, so that the quality of both surfaces approaches uniform. However, the elongation of the crepe and the wrinkles generated by the moisture once given do not return to the original shape even when the moisture is reduced, leaving a certain difference in elongation, and a bulky effect is produced after cutting the web.

Due to the bulky effect of the wrinkles, 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. It is preferable to do so.
In the illustrated example, a 2-ply tissue paper is illustrated, but a 3-ply or more tissue paper having an intermediate layer of 1 ply or more may be used.

The above-mentioned secondary raw fabric roll is subjected to a folding process, especially in a tissue paper product. As the folding process, a known method such as a rotary type interfolder or a multi-stand type interfolder can be used, but it is more preferable to use the multi-stand type interfolder with high productivity.
A large number of secondary raw fabric rolls 22 are set in a multi-stand type interfolder, and a tissue paper bundle is manufactured by feeding out a secondary continuous sheet from the set secondary raw fabric roll 22, folding it, and laminating it. An example of the multi-stand type interfolder will be described below.

6 and 7 show an example of a multi-stand type interfolder. Reference numeral 2 in the drawing indicates secondary original rolls 22, 22 ... Set on the secondary original roll support portion (not shown) of the multi-stand type interfolder 1. The required number of the secondary rolls 22, 22 ... Are set side by side in the direction orthogonal to the drawing plane (horizontal direction in FIG. 6 and front-back direction on the paper surface in FIG. 7). Each secondary raw fabric roll R has a slit in the width of the tissue paper product according to the above-mentioned manufacturing equipment and manufacturing method of the secondary raw fabric roll for the tissue paper product, which is a plurality of times the width of the tissue paper product, in the illustrated example. It is wound and set twice as wide.

The continuous strip-shaped secondary continuous sheets 63A and 63B unwound from the secondary original roll 22 are guided by guide means such as guide rollers G1 and G1 and sent to the folding mechanism unit 60. Further, as shown in FIG. 8, the folding mechanism unit 60 is provided with a folding plate group 64 in which a required number of folded plates P, P ... Are arranged side by side. For each folded plate P, guide rollers G2 and G2 for guiding a pair of continuous secondary continuous sheets 63A or 63B and guide round bar members G3 and G3 are provided at appropriate positions. Further, below the folded plates P, P ..., Conveyors 65 that receive and convey the laminated strips 67 that are stacked while being folded are provided.

A folding mechanism using this type of folded plates P, P ... Is a mechanism known by, for example, US Pat. No. 4,502,048. In this type of folding mechanism, as shown in FIG. 9, each continuous secondary continuous sheet 63A, 63B ... Is folded in a Z shape, and the side of the adjacent continuous secondary continuous sheets 63A, 63B ... Stack the ends while crossing each other.

10 to 13 show in detail the portion of the folding mechanism portion 60 particularly related to the folded plate P. In the main folding mechanism unit 60, a pair of continuous secondary continuous sheets 63A and 63B are guided to 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 displaced so that the side ends do not overlap each other.

The continuous secondary continuous sheet overlapping on the lower side at the time of being guided by the folded plate P is referred to as the first continuous secondary continuous sheet 63A, and the continuous secondary continuous sheet overlapping on the upper side is referred to as the second continuous sheet. Assuming that the secondary continuous sheet 63B is used, these continuous secondary continuous sheets 63A and 63B are the second continuous secondary continuous of the first continuous secondary continuous sheet 63A as shown in FIGS. 9 and 11. The side end portion e1 that does not overlap with 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. 9 and 12, the second continuous sheet 63B is folded back. The side end e2 of the continuous secondary continuous sheet 63B that does not overlap with the first continuous secondary continuous sheet 63A is folded downward so as to be pulled 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 portions e3 (e1) of the continuous secondary continuous sheets 63A stacked while being folded in the upstream folded plate P are formed from the slits P2 of the folded plate P to the second. It is guided between the folded portions of the continuous secondary continuous sheet 63B. In this way, each of the continuous secondary continuous sheets 63A, 63B ... Is folded in a Z shape, and the side ends of the adjacent continuous secondary continuous sheets 63A and 63B are crossed with each other. At times, pulling out the top tissue paper will pull out the side edges of the next tissue paper.

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 in the subsequent stage and is tissueed. The paper bundle 67a is defined as, and 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. The direction (CD direction). Therefore, as shown in FIG. 14A, the direction of the tissue paper forming the tissue paper bundle 67a obtained by cutting the laminated band 67 to a predetermined length is along the folding direction of the tissue paper. It becomes 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 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 perforation M. This 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, the direction of the tissue paper forming the tissue paper bundle 67a is the lateral direction (CD direction) along the folding direction of the tissue paper, and therefore, as shown in FIG. 14B, When the tissue paper T is pulled out from the storage box B, the drawing direction thereof is along the lateral direction (CD direction) of the tissue paper T.

FIG. 15 shows an outline of the device according to another embodiment of the present invention, and FIG. 16 shows a flow chart. In the form of FIG. 15, the laminated continuous sheet after the chemical solution application and the lamination integration is sent to the rotary type interfolder 23, folded, and then cut into the product width.

The base paper and the chemical solution were produced under the following conditions, and an elongation test (test 1) of the base paper and a performance comparison test (test 2) of the tissue paper were carried out.
〔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 carried out on Examples 1 to 9 of the tissue paper according to the present invention and Comparative Examples. The configurations of Examples 1 to 9 and Comparative Examples, the results of 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 when the chemical solution after ply was not applied during the operation and each sheet tsubo 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 on both surface layers or the total coating amount on both sides is the total coating amount per unit area of the plyed tissue paper sheets, 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, after confirming 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 set the zero point, and then set the zero point. Raise the plunger, place the sample on the test table, and slowly lower the plunger perpendicular to the paper surface to 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 flat surface having a diameter of 10 mm hits the paper plane perpendicularly, and the load at the time of measuring the paper thickness is about 70 gf. The paper thickness is an average value obtained by performing the measurement 10 times with 2 plies.

[Product paper density]
It was measured according to JIS P 8124 (1998). In the case of the 2-ply tissue product in Table 1, the average paper density of the 2-ply sheet is shown.
[Web bulk]
A plastic plate weighing 30 g and having 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 make the web bulk.
[Softness]
The measurement was performed according to the handle ometer method (JIS L 1096E).
However, the test piece had a size of 100 mm × 100 mm, and the clearance was 5 mm. The measurement was performed 5 times each in the vertical direction and the horizontal direction with 1 ply, and the average value of all 10 times was taken as two decimal places and expressed in units of cN / 100 mm.

〔sensory evaluation〕
The tissue papers of Examples and Comparative Examples were subjected to sensory evaluation regarding softness and fluffiness. The sensory evaluation was performed by 15 inspectors on a 5-point scale with "3" for general-purpose tissue paper ("Eliere Tissue" 180 pieces (manufactured by Daio Paper Corporation)) that had not been coated with a chemical solution. The evaluation criteria are as follows.
All the results of elleair tissue are set to 3 5: Very good 4: Excellent 3: Equivalent 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 2-ply tissue papers and Comparative Examples are compared, the paper thickness and the web bulk are the same as those of Examples 1 to 9 although the paper density is almost the same. High values were found in. Also, in the evaluation of sensuality, the results of the examples exceeded those of the comparative examples in terms of fluffiness. In particular, in Examples 1 and 2, it was found that while maintaining a high paper thickness and a fluffy feeling, it had good flexibility (softness, softness) equivalent to that of the comparative example.

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

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 roll, 30 ... Contact embossing, 31, 32 ... Continuous sheet.

Claims (2)

From the primary rolls with crepes, we manufacture multiple secondary rolls for Tish paper products that are used by setting a large number in a multi-stand interfolder.
A large number of these secondary raw fabric rolls are set in a multi-stand type interfolder, and a continuous sheet is unwound from the set secondary raw fabric rolls, folded and laminated to form a tissue paper bundle at predetermined intervals. It is a manufacturing method that manufactures tissue paper products by cutting them and storing them in a storage box in a predetermined number of sets.
A laminating process in which primary continuous sheets unwound from a plurality of primary rolls are laminated along the continuous direction to form a laminated continuous sheet.
A chemical solution having a polyol is applied only to one surface layer side of a laminated continuous sheet that has not been embossed, or a chemical solution having a polyol is applied to one surface layer side with a larger amount than the other surface layer side. Process and
A winding process in which a laminated continuous sheet is coaxially wound to form a secondary raw fabric roll coated with a chemical solution for the Tish paper product, and a winding process.
Including
The tissue paper product is a method for producing a tissue paper product, characterized in that the paper thickness per set is 120 to 160 μm. The polyols are polyhydric alcohols selected from the group of glycerin, diglycerin, propylene glycol, 1,3-butylene glycol, polyethylene glycol, and derivatives thereof, or sorbitol, glucose, xylitol, maltitol, maltitol, mannitol, trehalose. The method for producing a tissue paper product according to claim 1, which comprises a saccharide selected from the group.

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