JP6752600B2 - How to make pocket tissue - Google Patents

Description

The present invention relates to a method for manufacturing a general-purpose pocket tissue, which mechanizes the stage of manually separating a specified number of sheets and manually placing them on a transport conveyor to an individual wrapping machine, and improves the production capacity by a fully automatic manufacturing process. A manufacturing method and an apparatus thereof are provided.

Conventionally, when the manufacturing method of pocket tissue is largely divided into a pre-process for manufacturing individual packaging using base paper as a raw material and a post-process for subsequent packaging, the following steps are included in the pre-process.
[First step] The first folding step of folding and laminating the base paper with a folding machine,
[Second step] The second cutting step, in which the folded tissue is manually cut into a specified number of sheets, and the cut tissue is manually placed on a conveyor for an individual wrapping process.
[Third step] A third individual wrapping step, in which the tissue is transported onto a separated tissue conveyor, transported to an individual wrapping machine, and individually wrapped by the individual wrapping machine.
As described above, the second cutting step involves manual work, which hinders the improvement of production capacity.
Subsequent post-processes
Manual work is also involved in the post-process of collective wrapping the individually wrapped pocket tissue by hand with the operation of a hand sealer.

In such a conventional method for manufacturing pocket tissue, the intervention of manual loading on a conveyor in the pre-process, especially the second cutting process and the subsequent individual packaging process, is limited to the improvement of production capacity. there were.

In the process of automating the above-mentioned pre-process, the inventor of the present application cuts a general-purpose tissue by a fully automatic folding machine dedicated to pocket tissue and puts it on a conveyor for an individual wrapping process. We found that the pocket tissue folding machine is charged with static electricity and the web sticks to the folding part (folding part), so that it is not possible to cut the tissue into a specified number of sheets. In the conventional folding machine, static electricity was not a problem because the second cutting step after folding with the folding machine was manually separated, but the first folding step and the first folding step of the pocket tissue manufacturing method were not a problem. By mechanizing the folding machine that seamlessly connects the two cutting processes, if all the manual work is eliminated until the individually wrapped tissue is manufactured as a semi-finished product, the paper will be charged with static electricity when folded by the fully automatic folding machine, and the charge will be eliminated as it is. However, since the web sticks to the folding part (folding part), it is not possible to separate the specified number of sheets.

In this case, the inventor has focused on the fact that the static electricity can be stored if the base paper is moistened to some extent by liquid spraying. For that purpose, when the base paper used in the pocket tissue manufacturing method is moistened, including the base paper manufacturing process used in the pocket tissue manufacturing process or the step of moistening the base paper before the first folding step. How to properly control the water content of the product is important in solving the problem. Moisture control in a range that does not generate static electricity and does not affect the paper quality can be solved by controlling the amount of spray according to the acceleration / deceleration of the processing machine during manufacturing, but spraying that achieves the purpose of not generating static electricity. The control range of the quantity was unknown.

In this respect, the water content of the base paper used in the conventional production of pocket tissue is regulated for the purpose of optimizing the paper strength. Patent Document 1 (Japanese Unexamined Patent Publication No. 2013-76174) is a sanitary paper coated with a texture improving agent containing a water-soluble softener and / or a water-soluble moisturizing agent in order to secure the paper strength. The amount of the texture improving agent added to the base paper is 2 to 15 wt% of the dry fiber weight of the base paper when the base paper is tissue paper as the amount of liquid containing water ”(Patent Document 1 claim 1). The reason for this is disclosed in the same document as "When the base paper is tissue paper, if the amount of the texture improving agent added to the base paper is less than 2 wt% by weight of the dry fibers, the texture improving effect of the base paper does not occur, and 15 Even if it exceeds%, the effect is saturated and the texture improving agent is wasted. Further, when the amount of the texture improving agent added to the base paper exceeds 15 wt% in terms of the weight ratio of the dry fibers as the liquid amount, the strength of the web decreases due to the water-based component of the texture improving agent and the hydration action of the pulp in the base paper. Wrinkles are likely to occur, causing paper breaks ”(8th to 3rd lines from the end of paragraph 0015).

Then, in view of the fact that the problem of fully automating the manufacturing process is neither disclosed nor suggested in Patent Document 1, the above-mentioned problem corresponding to static electricity is not described in Patent Document 1. It is reasonable to understand that it has not been suggested.

On the other hand, in order to prevent or remove static electricity due to the generation of static electricity, the upper and lower critical values of the spray amount are set when controlling the spray amount of the antistatic agent according to the acceleration / deceleration of the line speed of the processing machine during tissue manufacturing. It should be understood that there is a technical impediment to those skilled in the art. The need to deal with static electricity is to automate the process that used to be done manually, and even if static electricity is generated in the middle of the process, the static electricity is removed from the base paper by human intervention, and antistatic due to the generation of static electricity or its It seems that the problem of removal has not been clarified, and there is no disclosure of an invention focusing on prevention and removal of static electricity during the manufacture of pocket tissue. Regarding the upper limit of the spray amount, the spray amount of the antistatic agent is As the amount of liquid contained in the tissue increases, the strength of the tissue deteriorates and the paper may break. Regarding the lower limit, if the amount of the same agent contained in the tissue is too small, static electricity cannot be suppressed and static electricity cannot be suppressed. This is because the prevention of static electricity due to the generation of static electricity or its removal is not sufficient. Since the degree of paper charge criticality allowed during tissue manufacturing depends on the paper type of the member and tissue involved in the manufacturing process, considerable trial and error is required, which is a technical obstacle for those skilled in the art. It should be understood that there is a factor.

In this way, regarding the manufacturing method of pocket tissue, in order to mechanize the stage of manually separating the specified number of sheets and manually placing them on the transport conveyor to the individual packaging machine, and to improve the production capacity by the fully automatic manufacturing process, the pocket tissue The problem is to prevent and remove static electricity during manufacturing. To solve this problem, in the manufacturing method of pocket tissue, when spraying an antistatic agent on paper to prevent or remove static charge, the pocket tissue is used. It is reduced to the idea of a solution to the problem of setting the critical value when controlling the spray amount of the antistatic agent according to the acceleration / deceleration of the processing machine at the time of manufacturing with the automatic folding machine.

Japanese Unexamined Patent Publication No. 2013-76174

The present invention relates to a method for manufacturing a pocket tissue and its device, and eliminates the influence of static electricity even by a fully automatic folding means at the stage of separating a specified number of sheets, and the folding machine of the pocket tissue is charged with static electricity and a folding portion (folding portion). to provide a manufacturing how of pocket tissue that does not stick the web in part).

The present invention that solves this problem is as follows.

[Invention according to claim 1 ]
It is a manufacturing method of pocket tissue, and the manufacturing process is as follows:
With the preparatory process to prepare the base paper;
With the folding process of forming the base paper into a folding tissue;
A method for producing a pocket tissue, which comprises a cutting step of cutting the tissue into a specified number of sheets and placing the tissue on a conveyor to be transported to an individual wrapping process; and an individual wrapping step of receiving and individually wrapping the tissue after being cut from the conveyor.
During the folding step, a skewed region is provided in which the base paper is obliquely moved between the first roller and the second roller provided in the vertical direction.
Using said pressurized fluid spraying means from above the sheet to move the skew region viewed contains a pressurized liquid phase which contains water in a predetermined range to the base paper by spraying the liquid content containing water,
The liquid addition spraying means includes a water distribution supply pipe provided above the oblique region and a spray spray nozzle connected to the tip of the water distribution supply pipe, and the liquid addition spraying means includes water content of the base paper. The amount of liquid to be sprayed is adjusted by operating the pressurizing means provided in the water distribution supply pipe based on the amount and the moving speed in the skewed region of the base paper.
A method for producing a pocket tissue, in which the electrostatic charge of the tissue is prevented or removed in the cutting step, and the steps after the folding step can be fully automated.

[Effect of the invention]
Applying a physical action to a paper by the machine, the sliding portions to the manufacturing apparatus and the paper occurs locally on the charge of the paper occurs. In order to remove the generated charge, a substance that lowers the insulation of the paper and promotes the transfer of electric charge (hereinafter referred to as an antistatic agent in the present specification) is applied to the surface of the paper, or the paper is charged. It is desirable to include a substance that promotes the movement of the paper, transfer the locally generated electric charge to the paper, and remove the electric charge. In order to transfer the electric charge, the conductive substance transfers the electric charge, so that it is applied to the surface of the paper or contained in the paper. Generally, conductive particles such as carbon may be used as the antistatic agent, but a conductive liquid, for example, an electrolytic solution, is preferable as an additive to the paper. Here, the liquid may be water because water itself has conductivity even if it does not contain an electrolyte. Therefore, it is preferable that a liquid containing water is contained in the base paper, and the liquid is uniformly contained in the entire paper by spraying. Therefore, even if the base paper is impregnated with a liquid containing water before folding the tissue, the cutting process is mechanized, and the electric charge is generated by the physical action between the paper and the manufacturing apparatus, the electric charge is generated in the paper by the liquid. The charge is prevented or removed.

In this way, if a liquid spraying means is used in advance on the base paper before it is cut and formed into the tissue, and a step of impregnating the base paper with a predetermined amount of water by spraying the liquid containing water is included in the middle, the tissue is made. The fully automatic folding machine that mechanizes the process of cutting and placing on the conveyor to the individual packaging process makes it possible to fully automate the previous process, eliminating manual labor and eliminating the need for manual work, and even if the mechanized process causes sliding parts on the manufacturing equipment and paper, the paper will be It is not charged, and the pocket tissue folding machine is charged with static electricity to prevent the web from sticking to the folding part (folding part). In this way, the cutting process for the specified number of sheets is also performed using a mechanical fully automatic folding machine. It can be automated, and the effect of significantly improving production capacity can be obtained.
Further, during the folding process, a skew area is provided in which the base paper is obliquely moved between the first roller and the second roller provided in the vertical direction, and liquid is added from above the base paper moving in the skew area. Since it includes a liquid addition step in which a predetermined range of water is contained in the base paper by spraying a liquid containing water using a spraying means, it is possible to prevent the generation of a puddle of the spray liquid on the base paper and to the base paper. Uniform liquid impregnation can be achieved.

It is appropriate to specify the amount of liquid sprayed as including a predetermined amount of water in the tissue. This is because even if the liquid contains an electrolyte, the water content of the paper excluding the electrolyte from the electrolyte is the dominant parameter for the strength of the paper.

[Invention according to claim 2 ]
Range of the plant constant The method for manufacturing a pocket tissue according to claim 1, wherein a range in which the water content is sandwiched between the lower limit 6% by weight and an upper limit of 27% by weight.

[Effect of the invention]
The process of separating the tissue by mechanization and placing it on the conveyor to the individual packaging process is fully automated by means using a mechanical fully automatic folding machine, and even if manual work is eliminated, the water and liquid possessed by the original fabric of the base paper If the weight content of the minutes is in the range of weight% greater than 6 to less than 27, the pocket tissue folding machine will not be charged with static electricity and the web will not stick to the folding part (folding part), and the specified number of sheets will be used. It is possible to obtain the effect that the cutting can be fully automated by the folding means using a mechanical fully automatic folding machine.
If the water content of the paper is 6% by weight or less, static electricity cannot be suppressed, and if it is 27% by weight or more, the paper may be cut off by a folding machine.

[Invention according to claim 3 ]
Range of the plant constant The method for manufacturing a pocket tissue according to claim 1, wherein a range in which the water content is sandwiched between the lower limit 6% by weight and the upper limit value 14% by weight.

[Effect of the invention]
The larger the amount of water, the more the hydrogen bonds of the pulp fibers are affected and the paper becomes harder. Therefore, it is most desirable that the weight content of water is in the range of less than 14% by weight.

Thus, in the present invention, the weight% of the water content of the raw material of the base paper is adopted as a manufacturing parameter, and the process of cutting the tissue and placing it on the conveyor for the individual packaging process is completed by means using a mechanical fully automatic folding machine. Provided are a manufacturing method and an apparatus thereof that realizes a manufacturing process that can be fully automated by a folding means that automates, eliminates manual labor, and uses a mechanical fully automatic folding machine.

It is a side schematic of the manufacturing apparatus 1 used in the manufacturing method of the pocket tissue which concerns on one Embodiment of this invention. It is a front schematic diagram of the manufacturing apparatus 1 used in the manufacturing method of the pocket tissue which concerns on the said embodiment of this invention. FIG. 1 is a step (process) diagram S1 showing a process of a pocket tissue manufacturing method 1 according to an embodiment of the present invention. FIG. S2 is a step (process) diagram showing the process of the pocket tissue manufacturing method 2 according to another embodiment of the present invention. It is a side schematic of the manufacturing apparatus 2 used in the manufacturing method of the pocket tissue which concerns on other embodiment of this invention.

The manufacturing apparatus 1 used in the method for manufacturing a pocket tissue according to the embodiment of the present invention will be described below. FIG. 1 is a side schematic view of the manufacturing apparatus 1 used in the pocket tissue manufacturing method 1 according to the embodiment of the present invention, and FIG. 2 is a front schematic view of the apparatus 1.

The raw fabric roller can hold the raw fabric 2 in the manufacturing apparatus 1 used in the method for manufacturing the pocket tissue according to the embodiment of the present invention, and the raw fabric 2 to the base paper are oriented in the direction of reference numeral D1 shown in the schematic side view of FIG. It is paid out. Rollers (“first roller”) 5 and rollers (“second roller”) 6 are installed so that the base paper 3 can be skewed in a staggered manner, and the water spray spray nozzle 4 is above the base paper in this skewed area. Is installed, and the mist-like water 50 can be sprayed. The skewing of the base paper prevents the generation of a puddle of the spray liquid on the base paper, and makes it possible to realize uniform liquid impregnation on the base paper. An appropriate tension can be applied to the intermediate roller 8 by the dancing roller 7, and the base paper is guided from the intermediate roller 8 to the steering correction mechanisms 9 and 10 capable of correcting the steering. A slitter blade 14 capable of cutting the base paper 3 is installed between the base paper 12 and the base paper 12. Here, the base paper is cut into two base papers, which is twice as much as the case where the production capacity is not cut. Before cutting, the intermediate rollers 11 and 12 set an appropriate winding angle, and an appropriate tension is given to the base paper before cutting. The folding guide mechanism 16 can fold the cut base paper individually into a tissue, and the base paper flows along the guide mechanism 16 and is folded, and the folding tissues 18 and 19 (reference numeral 19 is shown in FIG. 1) by the downward roller 60. (Not shown, but shown in FIG. 2) is sent to the cutting mechanism shown in FIG. 2, schematic front view. Hereinafter, a schematic front view of FIG. 2 will be described. In FIG. 2, the downward folding tissues 20 and 30 are swiveled by 90 ° in the traveling direction as they are by the triangular plate mechanisms 21 and 31 (hereinafter, only reference numerals 21 and below are described, and 31 and below are interpreted in parallel). (Reference 22), fed to the cutting mechanism portion by the feed roll 23, guided by the pinch roll 24, cut by the cutter roll 25, folded on the web by the folding roll 26, and dropped on the conveyor 40 (reference numerals 29, 30). ), The tissues 37 and 38 output from the two lines to the conveyor 40 are sent to the individual wrapping mechanism (not shown) by the flight conveyors arranged at equal intervals, and are wrapped by the polymer film for individual wrapping pack (not shown). It is individually sealed by a fusion mechanism (not shown) and sent to a post-process assembly packaging mechanism (not shown) (not shown). The collective wrapping mechanism (not shown) arranges the individual wrapping tissues (not shown) in a predetermined number of three tiers, one tier of which is 1x2, and then packages them in the collective wrapping. It is packaged in corrugated cardboard (not shown) in 8 stages.

As schematically shown in the upper part of the figure of FIG. 1, the manufacturing apparatus 1 is provided with a spray controller 100, the manufacturing line is provided with a speed sensor 101, and the line speed can be output. The speed sensor 101 is signal-connected to the spray controller 100 by a signal line 102, and the line speed signal can be taken into the spray controller 100. The spray controller 100 includes an input / output device 110, is capable of inputting the water content of the base paper, and has a memory (not shown) for holding the input numerical value in the spray controller 100. A predetermined calculation logic can be incorporated and maintained in the spray controller 100 in advance, and the calculation logic includes the water content of the base paper held in the memory (not shown), the line speed from the speed sensor 101, and the base paper 3. Room temperature, humidity and other environmental data that can affect the water content are used as input data, and spray pressure data suitable for the amount of liquid to be sprayed from the injection nozzle 4 is dynamically generated according to the line speed by a predetermined calculation logic. The signal of the pump signal line 103 is generated toward the pump 140, and the control signal can be transmitted to the pump 140 by the signal line 103 signal connected to the pump 140. According to the received signal, the pump 140 receives the liquid to be added from the liquid distribution pipe 150, and the liquid can be sent to the spray spray nozzle 4 through the liquid distribution pipe 151 connected to the spray spray nozzle 4. .. The spray spray nozzle 4 is capable of spraying a mist-like spray droplet 50 toward the opposite base paper line in an oblique manner.

The pocket tissue manufacturing method according to the embodiment of the present invention shown in FIGS. 3 and 4 will be described with reference to the step (step) diagrams of the pocket tissue manufacturing methods S1 and S2. In the following, steps are used synonymously with steps, and steps are used synonymously with substeps within a step. As shown in FIG. 3, the manufacturing process S1 of the present invention is composed of a base paper preparation process S10, a folding process S20, a cutting process S30, an individual packaging process S40, and a subsequent post-process S99. It is composed of a base paper preparation step S10', a folding step S20', a cutting step S30, an individual packaging step S40, and a subsequent post-step S99, and the liquid addition step may be included in the folding step S20 (in the case of the manufacturing method S1). (See FIG. 3), may be included in the base paper preparation step 10 (in the case of manufacturing method S2, see FIG. 4). The case where the liquid addition step is included in the folding step S20 is a case where the folding step S20 is composed of a base paper receiving step S21, a liquid addition step S22, and a folding step S23 as shown in FIG. The case where the liquid addition step is included in the base paper preparation step S10'is a case where the liquid addition step is composed of the base paper transport step S101, the liquid addition step S102, and the base paper rewinding step S103 as shown in FIG. .. As described above, the liquid addition step may be included in the folding step (20 in FIG. 3) or may be incorporated in the base paper preparation step (S10'in FIG. 4). The term step here is a substep of the process.
next. We will discuss the method of producing pocket tissue using the method S1.

In the manufacturing method S1, the liquid addition step S22 is included in the folding step S20 following the base paper preparation step S10. The liquid addition step may be performed in S10 in the base paper preparation process included in the manufacturing process as shown in FIG. 4 showing the relationship between the process steps of the manufacturing method S2, but in the manufacturing process S1 shown in FIG. A liquid addition step S22 is provided immediately before the folding step S23 in the folding step S20, and the liquid addition step S22 is included in the folding step S20.

<Manufacturing method 1>
If the components of the manufacturing apparatus 1 used in the method for manufacturing a general-purpose (not coated with a chemical solution such as a moisturizer) pocket tissue according to one embodiment of the present invention are used, the manufacturing method S1 according to the present invention can be obtained.
The general-purpose pocket tissue manufacturing method S1 includes the following in the manufacturing process S1:
With preparation step S10 to prepare general-purpose base paper;
With the folding step S20 for forming the base paper 3 on the folding tissue 17;
It includes a cutting step S30 in which the tissue 17 is cut into a predetermined number of sheets and placed on a conveyor 40 to be conveyed to the individual wrapping step S40; and an individual wrapping step S40 in which the tissues 30 and 31 after being cut from the conveyor 40 are received and individually wrapped. In the pocket tissue manufacturing method S1, the liquid addition step S22 in which the liquid addition spraying means 4 is used and the base paper 3 is impregnated with water in a predetermined range by the spray 50 is included in the folding step S20 in the middle of the manufacturing process S1. The method S1 for manufacturing a pocket tissue is such that the electrostatic charge of the tissue is prevented or removed in the cutting step S30, and the folding step S20 and subsequent steps can be fully automated.

In the liquid addition step S22 included in the folding step S20, the spray controller 100 provided in the manufacturing apparatus 1 is used, the speed is measured by the speed sensor on the manufacturing line, and the line speed is output to the spray controller by the signal line 102. The speed signal is taken into the spray controller 100. The water content of the base paper is input to the spray controller 100 from the input / output device 110, and holds the numerical value input to the memory provided in the spray controller 100.
The spray controller 100 is preliminarily incorporated with a predetermined arithmetic logic, and is maintained and updated as needed.

The calculation logic uses the water content of the base paper held in the memory, the line speed from the speed sensor, and the room temperature, humidity, and other environmental data that can affect the water content of the base paper as input data, and uses these as predetermined data. The calculation logic dynamically calculates the appropriate spray pressure data for the amount of liquid to be sprayed from the injection nozzle according to the line speed, generates and transmits the signal of the pump signal line 103 to the spray pump 140, and sends it to the pump 140. A control signal is transmitted to the pump 140 by the signal line 103 to which the signal is connected. The pump 140 receives the liquid from the liquid supply pipe 150 according to the received pump operation control signal, and sends the liquid to the spray spray nozzle 4 through the pipe 151 connected to the spray spray nozzle 4. The spray spray nozzle 4 obliquely sprays an appropriate amount of mist-like spray droplets 50 toward the opposite base paper lines.

In the manufacturing method S1 using the manufacturing apparatus 1 provided with such a mechanism, a predetermined calculation logic is set as a range in which the water content is sandwiched between the lower limit value of 6% by weight and the upper limit value of 27% by weight, and the spray spray nozzle 4 is oblique. An appropriate amount of mist-like spray droplets 50 are sprayed toward the opposite base paper lines. The base paper is impregnated with a predetermined amount of water by spraying water, and the pre-process can be fully automated by a fully automatic folding machine that mechanizes the process of cutting general-purpose tissue and placing it on the conveyor for the individual packaging process. Even if the manufacturing equipment and the paper have sliding parts due to the mechanization process, the paper will not be charged, and the pocket tissue folding machine will prevent the web from sticking to the folding part (folding part) due to static electricity. The process of cutting the specified number of pocket tissue papers can also be fully automated by using a mechanical fully automatic folding machine, and the effect of significantly improving the production capacity can be obtained.

<Manufacturing method 2>
In the pocket tissue manufacturing method manufacturing method 2 according to another embodiment of the present invention shown in FIG. 4, the spray spray nozzle, which is the liquid filling means of the manufacturing apparatus 1, is not used, but the raw fabric roll 2 is pre-filled with liquid. A step of impregnating a predetermined range of water is performed before the folding step S20', and this is included in the base paper preparation step S10'. In this case, the base paper preparation step includes the base paper transport step S101, the liquid addition step S102, and the base paper rewinding step S103 in the base paper preparation step S10'.

By using the components of the manufacturing apparatus 2 (not shown) used in the pocket tissue manufacturing method 2 according to another embodiment of the present invention, the manufacturing method 2 according to the present invention can be obtained.
The pocket tissue manufacturing method 2 is described in the manufacturing process S2 as follows:
Preparation step S10'to prepare the base paper 2;
With the folding step S20'that forms the base paper 3 unwound from the base paper 2 into a folding tissue;
The tissue is cut into webs (in one embodiment, the dimensions after folding are 75 mm in length and 105 mm in width, 2 plies are 1 sheet, and 10 sheets are laminated), and the tissue is conveyed to the individual packaging step S40. And the carving step S30 to be placed on the conveyor;
A method for producing a pocket tissue including an individual wrapping step S40 for receiving and individually wrapping the tissues 30 and 31 after being separated from the conveyor 40, wherein a liquid addition step S102 for impregnating a base paper with a predetermined range of water is performed in the manufacturing step S2. Of these, the pocket tissue manufacturing method 2 is included in the preparation step S10', in which the electrostatic charge of the tissue is prevented or removed in the cutting step S30, and the folding step S20'and subsequent steps can be fully automated.

The liquid addition step is not necessarily on the continuous line, but may be carried out offline in advance or may be included in the preparation step S10'. In the separation step S30, the continuous line is realized by mechanization, and the static electricity of the tissue is reduced. Similar to the manufacturing method S1, the general-purpose pocket tissue in which the charge is prevented or removed and the folding step S20 or later can be fully automated is realized, and the production capacity is improved.

An example of the paper quality of the web produced by this manufacturing method is a base paper basis weight of 12.2 ± 0.5 g / m ² (measured by JIS P 8124 (1998)) and a paper thickness of 125 ± 15 μm (test of product condition). The piece is sufficiently humidity-controlled under the conditions of JIS P 8111 (1998), and then measured using a dial thickness gauge (thickness measuring instrument) "PEACOCK H type" (manufactured by Ozaki Seisakusho) under the same conditions. Measures without peeling off each ply of the product. The thickness is measured 5 times in the flow direction (MD direction). Further 5 in the flow direction (MD direction) different from the measured flow direction (MD direction). Measure once. Therefore, the average value obtained by performing 10 times is taken as the paper thickness), dry tensile strength length 270 ± 60 cN, width 120 ± 30 cN (105 ° C., after curing for 10 minutes, JIS P 8113 (1998)). (Measured with a load cell tensile tester in a width of 25 mm), wet tensile strength length 30 ± 20 cN, width 20 ± 20 cN (after curing at 105 ° C. for 10 minutes), according to JIS P 8135 (1998), by a load cell tensile tester. , Measured with a width of 25 mm).

Then, after the above-mentioned individual wrapping step, as a post-step (not shown, the same applies to the post-step and the means used in the post-step) as follows:
With collective packaging machine means;
Using corrugated cardboard caser means; and a conveyor connecting these means, the individual wrapping process manufactured is ordered into a predetermined number of lengths and widths and the number of layers, and is collectively wrapped by the wrapping machine means ( In one embodiment, a total of 6 wrapping packs of 3 tiers with 1 x 2 tiers are used), and the collective wrapping is packed in corrugated cardboard by a corrugated cardboard caser means for ordering the number of vertical and horizontal directions and the number of layers (1 In the embodiment, a total of 48 collective packaging packs of 8 stages with 1 stage of 2x3 are included), and if a post-process that is consistently automated from collective packaging to corrugated cardboard case packing is further included, the manufacturing process It is possible to realize a method for manufacturing pocket tissue, which can be mechanized in one line from the time when the raw material of the base paper is put in to the time when it is individually wrapped in a corrugated cardboard case without human intervention. In realizing this, full automation of the front-end process is the most effective, and the present invention provides a manufacturing method that realizes full automation of the front-end process.

By adopting the above-mentioned pre-process fully automated line and the post-process described in the previous paragraph, it is possible to carry out integrated production up to case packing on the production line on one line, and the production capacity can be further improved.

FIG. 5 shows a manufacturing apparatus 2 used in the pocket tissue manufacturing method according to another embodiment of the present invention. In the manufacturing apparatus 2 used in the method for producing pocket tissue according to another embodiment of the present invention, the raw fabric roller can hold the original fabric 2 as in the manufacturing apparatus 1, and the original fabric 2 to the base paper are the side surfaces of FIG. It is fed in the direction of reference numeral D1 shown in the schematic diagram. In the rollers 5 and 6, the base paper 3 is installed so as to be slanted in a stepped manner, and unlike the manufacturing apparatus 1, a two-fluid nozzle 204 is installed above the base paper in this skewed region, and mist-like water 50 can be sprayed. Is. The skewing of the base paper prevents the generation of a puddle of the spray liquid on the base paper, and makes it possible to realize uniform liquid impregnation on the base paper. In the following, the traveling system of the base paper is the same as that of the manufacturing apparatus 1, and the details will be described below focusing on the liquid addition spraying means which is a different part.
Water W and compressed air A are supplied to the bifluid nozzle 204 from a pipe (not shown) via solenoid valves 206 and 207, respectively, and can be sprayed.
The production line is equipped with a speed sensor 101 and is capable of outputting the line speed. The speed sensor 101 is signal-connected to the spray controller 200 by a signal line 102, and the line speed signal can be taken into the spray controller 200. The spray controller 200 includes an input / output device 210, and can input the water content, water pressure, and compressed air pressure of the base paper, and the spray controller 200 includes a memory (not shown) for holding the input numerical values. A predetermined calculation logic can be incorporated in the spray controller 200 in advance and can be maintained, and the calculation logic includes the water content, water pressure, compressed air pressure, and line from the speed sensor 101 of the base paper held in the memory (not shown). Room temperature, humidity and other environmental data that can affect the speed and the water content of the base paper 3 are used as input data, and the amount of liquid added to be sprayed from the injection nozzle 204 according to the line speed is appropriately solenoidd by a predetermined calculation logic. The opening / closing timing of the valves 206 and 207 is calculated, the opening / closing instruction control signal is dynamically calculated for the solenoid valve, and the signals of the solenoid valves 206 and 207 are transmitted.
These signals are taken into the spray controller 200 by the communication input means that receives the water content, water pressure, and compressed air pressure of the raw material, and the opening / closing instruction is given by the communication means 203, 205 that connects the solenoid valves 206, 207 and the spray controller 200. A signal is sent to the solenoid valves 206 and 207, and the moisture content of the tissue before separation according to the moisture content of the raw material and the production line speed is adjusted to the range between the lower limit of 6% by weight and the upper limit of 27% by weight. The manufacturing apparatus according to the present embodiment, which is spray-controlled, can also be used in the manufacturing method S1 shown in FIG. 3, and the description thereof is parallel to the case where the manufacturing apparatus 1 is used in the manufacturing method S1.

As described above, the present invention controls the water content of the base paper within the range where the water content is sandwiched between the lower limit of 6% by weight and the upper limit of 27% by weight, and is fully automatic at the stage of separating the specified number of sheets without the intervention of people. It is also possible to provide a method and an apparatus for manufacturing a pocket tissue in which the folding machine of the pocket tissue is charged with static electricity due to the generation of static electricity and the web does not stick to the folding portion (folding portion) by the folding means.

Although the embodiment according to the present invention has been described above, the present invention is not limited to the embodiment, and the antistatic agent is a water-soluble conductive liquid that does not harm the paper quality even if it is water alone, for example. , Higher alcohol may be used, as in the case of tertiary alcohol, there is glycol, and the speed sensor for detecting the line speed may be, for example, the unfolding speed of the original fabric as a sensor, and the rotation speed of the roller is calculated by the encoder. It may be a means for converting the rotation speed into a line speed, the line speed may be input to the spray controller by some means, and various components of the present invention may be used without departing from the spirit of the present invention. It can be modified and implemented. The effects of the inventions discussed here are not limited to those appearing in one embodiment at the same time, and it is sufficient if at least one of them is expressed to achieve the purpose of the product of the invention. , It will be easy to judge.

The present invention is applicable to the production of pocket tissues in the paper industry.

1 Pocket tissue making apparatus 2 raw 3 fiberboard 4 atomizing spray nozzle 5 b Ra (first roller)
6 roller (2nd roller)
7 Dancing Roller 8 Intermediate Roller 9,10 Steering Correction Mechanism 11, 12 Intermediate Roller 13 Roller 14 Slitter Blade 15 Intermediate Roller 16 Folding Guide Mechanism 17, 18, 19 Folding Tissue 20, 30 Folding Tissue 21, 31 Triangular Plate Mechanism 22, 32 Folding Tissue 23,33 Feed Roll 24,34 Pinch Roll 25,35 Cutter Roll 26,36 Folding Roll 29,39 Web 30,31,37,38 Conveyor Web 40 Conveyor
60 Downward roller
100 Spray controller 101 Speed sensor 102 Signal line 103 Signal line 110 Data input interface device 140 Pump 150 Liquid distribution pipe 151 Liquid distribution pipe 200 Spray controller 203 Signal line 204 Two-fluid nozzle 205 Signal line 206 Electromagnetic valve 207 Signal valve A Compressed air in Flow W water inflow
S1 Manufacturing method S2 Manufacturing method S10 Base paper preparation process S10'Base paper preparation process S101 Base paper transfer stage S102 Liquid addition stage S103 Base paper rewinding stage S20 Folding process S20' Folding process S21 Base paper acceptance stage S22 Liquid addition stage S23 Folding stage S201 Base paper acceptance stage S202 Folding stage S30 Cutting process S40 Pieces packaging process S99 Post-process

Claims (3)

It is a manufacturing method of pocket tissue, and the manufacturing process is as follows:
With the preparatory process to prepare the base paper;
With the folding process of forming the base paper into a folding tissue;
A method for producing a pocket tissue, which comprises a cutting step of cutting the tissue into a specified number of sheets and placing the tissue on a conveyor to be transported to an individual wrapping process; and an individual wrapping step of receiving and individually wrapping the tissue after being cut from the conveyor.
During the folding step, a skewed region is provided in which the base paper is obliquely moved between the first roller and the second roller provided in the vertical direction.
Using said pressurized fluid spraying means from above the sheet to move the skew region viewed contains a pressurized liquid phase which contains water in a predetermined range to the base paper by spraying the liquid content containing water,
The liquid addition spraying means includes a water distribution supply pipe provided above the oblique region and a spray spray nozzle connected to the tip of the water distribution supply pipe, and the liquid addition spraying means includes water content of the base paper. The amount of liquid to be sprayed is adjusted by operating the pressurizing means provided in the water distribution supply pipe based on the amount and the moving speed in the skewed region of the base paper.
A method for producing a pocket tissue, in which the electrostatic charge of the tissue is prevented or removed in the cutting step, and the steps after the folding step can be fully automated. Range of the plant constant The method for manufacturing a pocket tissue of claim 1 Symbol placement range that moisture content is sandwiched between the lower limit 6% by weight and an upper limit of 27% by weight. Range of the plant constant The method for manufacturing a pocket tissue of claim 1 Symbol placement range that moisture content is sandwiched between the lower limit 6% by weight and the upper limit value 14% by weight.

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