Method for producing absorber

Abstract

Provided is a method for producing an absorber by which changes in the absorber can be increased. The inventive method includes: forming a first absorbent sheet (30) having a first absorbent material (33) disposed in a first region (33a-33c) of the first sheet (32a-32c); forming a second absorbent sheet (20) having a second absorbent material (23) disposed in a second region (23a, 23b) of the second sheet (22); forming a continuous body (14) in which the first absorbent sheet (30) and the second absorbent sheet (20) overlap each other such that the first regions (33a-33c) and the second regions (23a, 23b) are adjacent to each other in a plan view; and cutting the continuous body (14) to include the first regions (33a-33c) and the second regions (23a, 23b) adjacent to each other, thereby forming the absorbent body (10) including the first absorbent material (33) and the second absorbent material (23).

Description

Technical Field

[0001] The invention relates to a method for producing an absorbent body comprising an absorbent material. Background Art

[0002] Absorbent bodies containing absorbent materials are used in diapers and sanitary napkins. For example, Fig.10 is a schematic diagram of an absorbent production facility. Fig.11 is an enlarged cross-sectional view of the relevant components. Fig.10 and Fig.11 As shown, the device includes: two units U1 and U2, U1 includes a conveyor C1 and an ejector 111, and U2 includes a conveyor C2 and an ejector 112; and a laminating roller R. Conveyors C1 and C2 respectively have negative pressure boxes 119, which are used to adsorb sheets S1 and S2 while conveying them. Sheets S1 and S2 respectively have a diffusion layer 121 and a short fiber layer 122, and the short fiber layer 122 is raised by a raising roller 130. Ejectors 111 and 112 spray powder and granular material 120 as absorbent materials onto the raised upper surfaces of sheets S1 and S2 conveyed along inclined surfaces F1 and F2. Thereby, absorption layers L1 and L2 are formed on the short fiber layers 122 of sheets S1 and S2. The laminating roller R stacks sheets S1 and S2 so that the absorption layers L1 and L2 face each other (for example, see patent document 1).

[0003] Patent Document 2 discloses producing an absorbent body by superposing and transferring two sheets of absorbent material onto each other.

[0004] Patent document 1: WO 2021 / 015001; Patent document 2: WO 2015 / 123087.

[0005] As described above, merely stacking two sheets and providing an absorbent material between the two sheets limits the variation of the absorbent body. In view of this, it is desired to further increase the variation of the absorbent body. Summary of the invention

[0006] The object of the present invention is to provide a method for producing an absorbent body which allows an increased variety of absorbent bodies.

[0007] The present invention provides a method for producing an absorbent body, the method steps are as follows:

[0008] A method for producing an absorbent body, comprising: (i) step 1, forming a first absorbent sheet having a first absorbent material arranged in a first region of the first sheet; (ii) step 2, forming a second absorbent sheet having a second absorbent material arranged in a second region of the second sheet; (iii) step 3, forming a continuous body including the first absorbent sheet and the second absorbent sheet, wherein the first region and the second region are adjacent to each other in a plan view; and (iv) step 4, cutting the continuous body to include the first region and the second region adjacent to each other, thereby forming an absorbent body including the first absorbent material and the second absorbent material.

[0009] According to the above method, the characteristics of the absorber can be changed according to the pattern of the first and second regions and the types and amounts of the first and second absorbent materials respectively disposed in the first and second regions. Therefore, the variation of the absorber can be increased.

[0010] According to a preferred embodiment, in a method for producing an absorbent body, in step 3, a continuous body in which a first absorbent sheet and a second absorbent sheet overlap each other is formed so that the first region and the second region are adjacent to each other in a plan view.

[0011] At this time, the overlapped first absorbent sheet and second absorbent sheet are simultaneously cut in step 4 to form an absorbent body.

[0012] According to another preferred embodiment, a method for producing an absorbent body further comprises: (v) step 5, after step 1 and before step 3, cutting the first absorbent sheet to form a first component including a first region; and (vi) step 6, after step 2 and before step 3, cutting the second absorbent sheet to form a second component including a second region. In step 3, a continuous body is formed, wherein the first component is aligned with the second component so that the first region and the second region are adjacent to each other in a plan view.

[0013] At this time, since the continuous body includes the cut first and second absorbent sheets, and the first and second parts formed after cutting the first and second absorbent sheets and not overlapping each other, the thickness of the absorbent body can be reduced and the sheet material used for the absorbent body can be reduced.

[0014] Preferably, in step 1, the first absorbent material is disposed on a plurality of first sheets. In step 3, a continuous body in which a plurality of first sheets are disposed at intervals is formed.

[0015] In this case, a channel can be formed along the intervals between adjacent first sheets. At the same time, since the plurality of first sheets are not bound to each other, an absorbent body that can be easily fitted to the shape of the wearing part can be formed.

[0016] Preferably, in step 1, the first absorbent material is arranged in a plurality of first regions aligned in a continuous direction of the first sheet material and arranged at intervals. In step 2, the second absorbent material is arranged in a plurality of second regions aligned in a continuous direction of the second sheet material and arranged at intervals.

[0017] At this time, channels may be formed between a plurality of rows of first regions aligned along a continuous direction of the first sheet.

[0018] Preferably, in step 1, a first wrapping sheet is joined to a first sheet material to form a first absorbent sheet material having a first absorbent material disposed between the first sheet material and the first wrapping sheet.

[0019] At this time, by adding the first covering sheet, the variation of the absorbent body can be increased. At the same time, the first absorbent material can be prevented from moving outward from the first region, thereby stabilizing the quality of the absorbent body.

[0020] Preferably, in step 2, the second wrapping sheet is joined to the second sheet material to form the second absorbent sheet having the second absorbent material disposed between the second sheet material and the second wrapping sheet.

[0021] At this time, by adding the second covering sheet, the change of the absorbent body can be increased. At the same time, the second absorbent material can be inhibited from moving to the outside of the second region, thereby stabilizing the quality of the absorbent body.

[0022] The present invention can increase the variation of the absorbent. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is an explanatory diagram of Example 1 of an absorbent body production method of the present invention. Figure 2 (a) is an illustration of the first sheet in Example 1 of the present invention; Figure 2 (b) is an explanatory diagram of the second sheet in Example 1 of the present invention. Figure 3 (a) is a plan view of the continuum and absorber of Example 1 of the present invention; Figure 3 (b) is a schematic cross-sectional view of the continuum and the absorbent body described in Example 1. Figure 4 It is a perspective view of the related parts of the continuum of Example 1 of the present invention. Figure 5 This is an explanatory diagram of Example 2 of a method for producing an absorbent body according to the present invention. Figure 6 This is an explanatory diagram of Example 3 of a method for producing an absorbent body according to the present invention. Figure 7 (a) is a schematic plan view of the continuum and absorber of Example 3 of the present invention; Figure 7(b) is a schematic cross-sectional view of the continuum and the absorbent body described in Example 3. Figure 8 This is an explanatory diagram of Example 4 of a method for producing an absorbent body according to the present invention. Fig. 9 (a) is a schematic plan view of the continuum and absorber of Example 4 of the present invention; Fig. 9 (b) is a schematic cross-sectional view of the continuum and the absorbent body described in Example 4. Fig.10 It is a schematic diagram of the layout of Example 1 of traditional absorbent production equipment. Fig.11 It is an enlarged cross-sectional view of the relevant parts of Example 1 of the production equipment of the traditional absorbent body. DETAILED DESCRIPTION

[0024] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0025] Example 1: Figures 1 to 4 As shown, Example 1 of a method for producing an absorbent body of the present invention will be described below.

[0026] Figure 1 1 is a schematic diagram of a method for producing an absorbent body 10 of the present invention. Figure 1 As shown, the first absorbent sheet 30 and the second absorbent sheet 20 are formed; a continuous body 14 in which the first absorbent sheet 30 and the second absorbent sheet 20 overlap each other is formed; and then, the continuous body 14 is cut to form the absorbent body 10.

[0027] (1) The formation process of the first absorbent sheet 30 is as follows: Figure 2 (a) is an illustration of the first sheet 32a-32c. Figure 1 and Figure 2 As shown in (a), the raw material sheet 32 ​​is conveyed in the continuous direction 32x of the raw material sheet 32, and the first covering sheet 34 is conveyed in the continuous direction 34x of the first covering sheet 34. The raw material sheet 32 ​​is an air-laid nonwoven fabric; the first covering sheet 34 is a nonwoven fabric.

[0028] Then, slits 32p, 32q are formed through the main surfaces 32s, 32t of the raw material sheet 32 ​​to divide the raw material sheet 32, thereby forming a plurality of first sheets 32a, 32b, 32c. Then, intervals 32u, 32v between adjacent first sheets 32a, 32b, 32c are increased, and the first sheets 32a-32c are conveyed in parallel.

[0029] Then, if Figure 1 As shown by the arrow 33x, the first absorbent material 33 (see Figure 3(b)) is intermittently applied to the first sheet 32a-32c and / or the first wrapping sheet 34, and then the first sheet 32a-32c and the first wrapping sheet 34 are joined together to form the first absorbent sheet 30 having the first absorbent material 33. The first absorbent material 33 is an absorbent material in a granular or powdery form in a dry state, for example, a powder and granular material of a superabsorbent polymer abbreviated as "SAP".

[0030] The first absorbent sheet 30 can be formed by Fig.10 The production equipment shown in the figure is formed. At this time, one of the conveyors C1, C2 is used to convey the first sheets 32a-32c, and the other is used to convey the first covering sheet 34. The first absorbent material 33 is sprayed onto the upper surface of the first sheets 32a-32c and / or the first covering sheet 34 conveyed along the inclined surfaces F1, F2 by one or both of the sprayers 111, 112, and then the first sheets 32a-32c and the first covering sheet 34 are joined together by the laminating roller R. Although the first absorbent sheet 30 can be formed without using the nap roller 130, the first sheets 32a-32c can also be napped by using the nap roller 130.

[0031] Hot melt glue or adhesive is pre-applied to the first wrapping sheet 34 and / or the first sheets 32a, 32c by the applicator 81, and the first absorbent sheet 30 is formed at the bonding place of the first sheets 32a-32c and the first wrapping sheet 34. The first absorbent sheet 30 can be formed without the first sheets 32a, 32c being bonded to the first wrapping sheet 34.

[0032] The first absorbent material 33 is supplied to the first sheet 32a-32c and / or the first covering sheet 34 to form a Figure 2 The first absorbent sheet 30 of the first absorbent material 33 in the first shaded area 33a-33c of the first sheet 32a-32c shown in (a). The first areas 33a-33c are aligned in the direction 32X in which the first sheets 32a-32c are continuous, and a plurality of rows are arranged at intervals. Although the first absorbent material 33 can be supplied at an appropriate time and position, it is preferably supplied just before the first sheets 32a-32c and the first covering sheet 34 are joined together, so that the supply pattern of the first absorbent material 33 can be prevented from being disturbed.

[0033] The first regions 33a-33c may be appropriately arranged according to the specific situation, for example, they may be aligned in the direction 32x in which the first sheets 32a-32c are continuous, or they may be continuous without intervals in the direction 32x in which the first sheets 32a-32c are continuous. Although the first regions 33a-33c may intersect with the cutting position 11 where the continuous body 14 is cut to form the absorbent body 10, if they are far away from the continuous body 14, the first regions 33a-33c may be arranged in a direction 32x in which the first sheets 32a-32c are continuous. Figure 2The cutting position 11 shown in (a) can suppress the wear of the cutting blade.

[0034] It is also possible to use a plurality of first sheets 32a-32c prepared in advance, instead of cutting out the plurality of first sheets 32a-32c from the raw material sheet 32. The number of the first sheets 32a-32c may be one, two, four or more.

[0035] When the first wrapping sheet 34 is omitted, the first absorbent material 33 may be disposed on the first sheets 32a-32c to form the first absorbent sheet 30. In this case, after the first absorbent material 33 is disposed on the plurality of first sheets 32a-32c, the intervals 32u, 32v between the first sheets 32a-32c may be increased.

[0036] That is, the method for producing the absorbent body 10 includes step 1 of forming a first absorbent sheet 30 having a first absorbent material 33 disposed in a first region 33a-33c of at least one of the first sheets 32a-32c.

[0037] Preferably, in step 1, the first absorbent material 33 is disposed on a plurality of first sheets 32a-32c.

[0038] Preferably, in step 1, the first absorbent material 33 is disposed in a plurality of rows of first regions 33a-33c arranged at intervals and aligned along a continuous direction 32x of the first sheets 32a-32c.

[0039] In the case where the first wrapping sheet 34 is not omitted, in step 1 , the first wrapping sheet 34 is joined with the first sheets 32 a - 32 c to form the first absorbent sheet 30 having the first absorbent material 33 disposed between the first sheets 32 a - 32 c and the first wrapping sheet 34 .

[0040] (2) The formation process of the second absorbent sheet 20 is as follows: Figure 2 (b) is an explanatory diagram of the second sheet 22. Figure 1 and Figure 2 As shown in (b), the second sheet 22 is conveyed in the direction 22x in which the second sheet 22 continues, and the second wrapping sheet 24 is conveyed in the direction 24x in which the second wrapping sheet 24 continues. For example, the second sheet 22 and the second wrapping sheet 24 are nonwoven fabrics.

[0041] Then, if Figure 1 As shown by the arrow 23x in FIG. Figure 3(b)) is intermittently applied to the second sheet 22 and / or the second wrapping sheet 24. Then, the second sheet 22 and the second wrapping sheet 24 are joined together to form the second absorbent sheet 20. Similar to the first absorbent sheet 30, the second absorbent sheet 20 can be formed by Fig.10 The second absorbent material 23 is an absorbent material in a granular or powdery state in a dry state, such as a powder or granular material of SAP, and can be the same as or different from the first absorbent material 33 .

[0042] Hot melt glue or adhesive is pre-applied to the second sheet 22 and / or the second wrapping sheet 24 by the applicator 82, and the second absorbent sheet 20 is formed at the bonding of the second sheet 22 and the second wrapping sheet 24. The second absorbent sheet 20 can be formed without the second sheet 22 and the second wrapping sheet 24 being joined.

[0043] The second absorbent material 23 is supplied to the second sheet 22 and / or the second covering sheet 24 to form a Figure 2 (b) shows the second absorbent sheet 20 of the second absorbent material 23 in the second shaded areas 23a, 23b of the second sheet 22. The second areas 23a, 23b are aligned in a row in the continuous direction 22x of the second sheet 22 and are arranged at intervals. Although the second absorbent material 23 is supplied at an appropriate time and position, it is preferably supplied just before the second sheet 22 and the second covering sheet 24 are joined, so that the supply pattern of the second absorbent material 23 can be prevented from being disturbed.

[0044] The second absorbent material 23 may be appropriately designed, for example, it may be continuous without intervals in the direction 22x in which the second sheet 22 is continuous. Although the second regions 23a, 23b may intersect the cutting position 11 where the continuous body 14 will be cut to form the absorbent body 10, if it is away from Figure 2 The cutting position 11 shown in (b) can suppress the wear of the sheet cutting blade.

[0045] In the case where the second covering sheet 24 is omitted, the second absorbent material 23 may be provided on the second sheet 22, thereby forming the second absorbent sheet 20. An example of this structure will be described as Embodiment 4.

[0046] That is, the method for producing the absorbent body 10 includes step 2 of forming the second absorbent sheet 20 having the second absorbent material 23 disposed in the second regions 23a, 23b of the second sheet 22.

[0047] Preferably, in step 2 , the second absorbent material 23 is disposed in second regions 23 a , 23 b aligned and spaced apart in the continuous direction 22 x of the second sheet material 22 .

[0048] In the case where the second wrapping sheet 24 is not omitted, in step 2 , the second wrapping sheet 24 is joined to the second sheet 22 to form the second absorbent sheet 20 having the second absorbent material 23 disposed between the second sheet 22 and the second wrapping sheet 24 .

[0049] (3) The formation process of the continuous body 14 and the absorbent body 10 is as follows: Figure 3 (a) is a schematic perspective plan view showing the continuous body 14 , and a schematic plan view of the absorbent body 10 . Figure 3 (b) Yes Figure 3 (a) is a cross-sectional view taken along line AA. Figure 1 and Figure 3 As shown, the carrier sheet 12 is conveyed in the direction 12x in which the carrier sheet 12 is continuous, and hot melt glue or adhesive is applied to the first absorbent sheet 30 and the second absorbent sheet 20 by the application devices 83, 84. Then the second absorbent sheet 20 is placed on the middle area of ​​one main surface 12s of the carrier sheet 12 in the width direction, and the second absorbent sheet 20 is adhered to the carrier sheet 12. Then the first absorbent sheet 30 is placed on the second absorbent sheet 20, and the first absorbent sheet 30 is adhered to the second absorbent sheet 20. Thus, a continuous body 14 including the first absorbent sheet 30 and the second absorbent sheet 20 is formed.

[0050] At this time, the first absorbent sheet 30 is overlapped with the second absorbent sheet 20 so that the first areas 33a-33c having the first absorbent material 33 provided on the first absorbent sheet 30 and the second areas 23a, 23b having the second absorbent material 23 provided on the second absorbent sheet 20 are adjacent to each other in a plan view, and the first areas 33a-33c and the second areas 23a, 23b adjacent to each other are arranged between the adjacent cutting positions 11.

[0051] Then, hot melt glue or adhesive is applied to the carrier sheet 12 and / or the first absorbent sheet 30 by the application device 85, and then, the portions 12a and 12b of the carrier sheet 12 protruding from both sides of the first adhesive sheet 30 and the second adhesive sheet 20 are folded and placed on the first absorbent sheet 30. Thus, the continuous body 14 has the first absorbent sheet 30 and the second absorbent sheet 20 wrapped by the carrier sheet 12.

[0052] Then, the continuous body 14 is cut at the cutting position 11 to form the absorbent body 10. Thus, the absorbent body 10 provided with the first absorbent material 23 and the second absorbent material 33 can be formed.

[0053] It is also possible to omit part or all of the applicators 81-85. Appropriate components can be bonded by ultrasonic waves, heat sealing, etc. instead of adhesives at an appropriate time, so that the first absorbent sheet 30 and / or the second absorbent sheet 20 and the continuous body 14 can be formed without adhesive bonding or adhesive bonding.

[0054] The carrier sheet 12 and the first absorbent sheet 30 and the second absorbent sheet 20 may be stacked in any order. For example, the order may be as follows: the second absorbent sheet 20 is placed on the carrier sheet 12, and then, the first absorbent sheet 30 is placed on the second absorbent sheet 20. After the first absorbent sheet 30 and the second absorbent sheet 20 are stacked, the first absorbent sheet 30 and the second absorbent sheet 20 are placed on the carrier sheet 12. Further, a continuous body 14 may be formed in which the carrier sheet 12 is omitted and the first absorbent sheet 30 and the second absorbent sheet 20 overlap each other.

[0055] That is, the production method of the absorbent body 10 includes: step 3, forming a continuous body 14 including a first absorbent sheet 30 and a second absorbent sheet 20, wherein the first region 33a-33c and the second region 23a, 23b are adjacent to each other in a plan view; and step 4, cutting the continuous body 14 to include the first region 33a-33c and the second region 23a, 23b adjacent to each other, thereby forming an absorbent body 10 including the first absorbent material 33 and the second absorbent material 23.

[0056] Specifically, in step 3, a continuous body 14 in which the first absorbent sheet 30 and the second absorbent sheet 20 overlap each other is formed so that the first regions 33a-33c and the second regions 23a, 23b are adjacent to each other in a plan view. At this time, the overlapped first absorbent sheet 30 and the second absorbent sheet 20 are simultaneously cut in step 4 to form an absorbent body.

[0057] Preferably, in step 3, a continuous body 14 in which a plurality of first sheets 32a-32c are spaced apart is formed.

[0058] (4) The following will be combined Figure 4 A description is given of an arrangement pattern of a first region and a second region adjacent to each other in a plan view. Figure 4 1 is a perspective view of a relevant part of a continuous body 14 in which a first absorbent sheet 30 and a second absorbent sheet 20 overlap each other, and shows a first region and a second region provided between adjacent cut positions 11. The first absorbent sheet 30 and the second absorbent sheet 20 are continuous in a first direction X.

[0059] Figure 4 The configuration mode shown in (a) is Figures 1 to 3 If Figure 4As shown in (a), three first regions 33a-33c extending in the first direction X are arranged between two second regions 23a, 23b arranged at intervals along the first direction X, and the first regions 33a-33c and the two second regions 23a, 23b are in contact. The three first regions 33a-33c are arranged at intervals in the second direction Y orthogonal to the first direction X. Thus, two channels 16a surrounded by the first regions 33a-33c and the second regions 23a, 23b are formed. The first absorbent material 33 and the second absorbent material 22 are not arranged in the two channels 16a.

[0060] exist Figure 4 In (b), three first regions 33a, 33d, 33c extending in the first direction X are arranged between two second regions 23a, 23b arranged at intervals along the first direction X. Among the three first regions 33a, 33d, 33c, the first regions 33a, 33c located on both sides of the second direction Y are in contact with two second regions 23a, 23b, and the middle first region 33d is in contact with only one second region 23b and is adjacent to the other second region 23a at intervals. Thus, a U-shaped channel 16b is formed.

[0061] exist Figure 4 In (c), three first regions 33p-33r extending in the first direction X are arranged between two second regions 23a, 23b arranged at intervals along the first direction X, and the three first regions 33p-33r are adjacent to one second region 23a at intervals and contact the other second region 23b, thereby forming a π-shaped channel 16c opened at two positions on both sides of the second direction Y.

[0062] exist Figure 4 In (d), three first regions 33u-33w extending in the first direction X are arranged between two second regions 23a, 23b arranged at intervals along the first direction X, and the three first regions 33u-33w are adjacent to the two second regions 23a, 23b at intervals. Thus, a substantially II-shaped or H-shaped channel 16d is formed which opens at four positions on both sides of the second direction Y.

[0063] exist Figure 4 In (e), two first regions 33m, 33n extending in the first direction X are arranged at intervals in the second direction Y, three second regions 23u-23w are arranged at intervals between the two first regions 33m, 33n along the first direction X, and the three second regions 23u-23w are adjacent to the two first regions 33m, 33n. Thus, two channels 16e are formed which are surrounded by the first regions 33m, 33n and the second regions 23u-23w and aligned in the first direction X.

[0064] Configuration modes are achievable where, Figure 4 The first and second regions shown are interchangeable.

[0065] By forming the absorber using the above method, the characteristics of the absorber can be changed according to the pattern of the first and second regions and the types and amounts of the first and second absorbent materials respectively disposed in the first and second regions. Therefore, the purpose of increasing the variation of the absorber can be achieved.

[0066] When the absorbent body 10 includes a plurality of first sheets 32a, 32c, channels can be formed along the spaces 32u, 32v between adjacent first sheets 32a-32c. At the same time, since the plurality of first sheets 32a-32c are not constrained by each other, the absorbent body 10 can be formed to be easily conformed to the shape of the wearing part.

[0067] By adding the first covering sheet 34, the first absorbent material 33 is prevented from moving outward from the first regions 33a, 33b, thereby improving and stabilizing the quality of the absorbent body 10. By adding the second covering sheet 24, the second absorbent material 23 is prevented from moving outward from the second regions 23a, 23b, thereby improving and stabilizing the quality of the absorbent body 10. By selecting various properties such as liquid permeability, liquid diffusivity, and liquid retention of the first covering sheet 33 and / or the second covering sheet 23, the purpose of increasing the variation of the absorbent body 10 can be achieved.

[0068] Embodiment 2: will combine Figure 5 A method for producing the absorbent body 10a of Example 2 having more sheets will be described. Figure 5 1 is a schematic explanatory diagram of a method for producing the absorbent body 10a. Hereinafter, the same components as those in Embodiment 1 are denoted by the same reference numerals, and differences from Embodiment 1 will be mainly described.

[0069] like Figure 5 As shown, the production method of the absorbent body in Example 2 is basically similar to the production method of the absorbent body in Example 1.

[0070] The original material sheet 42 is conveyed in the direction 42 x in which the original material sheet 42 continues, and is divided into the first divided sheets 52 and the third divided sheets 62 .

[0071] As in the first embodiment, the first divided sheet 52 is conveyed in the direction 52x in which the first divided sheet 52 is continuous, and the first wrapping sheet 54 is conveyed in the direction 54x in which the first wrapping sheet 54 is continuous. The first divided sheet 52 is divided into a plurality of first sheets 52a-52c. Then, as shown by arrows 53x, the first absorbent material is supplied to the first sheets 52a-52c and / or the first wrapping sheet 54. Then, the first sheets 52a-52c are joined together with the first wrapping sheet 54 to form the first absorbent sheet 50, wherein the first absorbent material is sandwiched between the first sheets 52a-52c and the first wrapping sheet 54, and the first absorbent material is disposed in the first region of the first sheets 52a-52c.

[0072] Similarly, the third divided sheet 62 is conveyed in the direction 62x in which the third divided sheet 62 is continuous, and the third wrapping sheet 64 is conveyed in the direction 64x in which the third wrapping sheet 64 is continuous. Then, the third divided sheet 62 is divided into a plurality of third sheets 62a-62c. Then, as shown by arrows 63x, the third absorbent material is supplied to the third sheets 62a-62c and / or the third wrapping sheet 64. Then, the third sheets 62a-62c and the third wrapping sheet 64 are joined together to form the third absorbent sheet 60, wherein the third absorbent material 63 is sandwiched between the third sheets 62a-62c and the third wrapping sheet 64, and the third absorbent material is disposed in the third region of the third sheet 60.

[0073] Then, as shown by arrow 43x, the fourth absorbent material is supplied to the first absorbent sheet 50 and / or the third absorbent sheet 60. Then, the first absorbent sheet 50 and the third absorbent sheet 60 are joined together to form the fourth absorbent sheet 40, wherein the fourth absorbent material is sandwiched between the first absorbent sheet 50 and the third absorbent sheet 60 and is disposed in the fourth region.

[0074] The second sheet 22 is conveyed in the direction 22x in which the second sheet 22 is continuous, and the second wrapping sheet 24 is conveyed in the direction 24x in which the second wrapping sheet 24 is continuous, as indicated by arrow 23x, the second absorbent material is supplied to the second sheet 22 and / or the second wrapping sheet 24, and the second sheet 22 and the second wrapping sheet 24 are joined together to form a second absorbent sheet 20, wherein the second absorbent material is sandwiched between the second sheet 22 and the second wrapping sheet 24, and the second absorbent material is arranged in the second area of ​​the second sheet 22.

[0075] Then, the second absorbent sheet 20 is placed on the carrier sheet 12, and then the fourth absorbent sheet 40 is placed on the second absorbent sheet 20. Thus, a continuous body 14a including the second absorbent sheet 20 and the fourth absorbent sheet 40 is formed. Since the fourth absorbent sheet 40 includes the first absorbent sheet 50, the continuous body 14a includes the first absorbent sheet 50 and the second absorbent sheet 20. At this time, a continuous body 14a is formed in which at least two regions of the first to fourth regions are adjacent to each other in a plan view. For example, the fourth absorbent sheet 40 and the continuous body 14a are formed so that in a plan view, two regions of the first to fourth regions are adjacent to each other, and the other two regions overlap with one or two regions of the adjacent two regions. A continuous body 14a in which the first to fourth regions do not overlap with other regions in a plan view can be formed. Then, the two side portions 12a, 12b of the carrier sheet 12 in the width direction are folded. Thus, the second absorbent sheet 20 and the fourth absorbent sheet 40 are wrapped by the carrier sheet 12.

[0076] Then, the continuous body 14a is cut to form the absorbent body 10a. At this time, the continuous body 14a is cut at the cutting positions 11 so as to include at least two adjacent regions between adjacent cutting positions 11, forming the absorbent body 10a including at least two of the first to fourth absorbent materials.

[0077] As in Example 1, the sheets are appropriately bonded by applying hot melt adhesive or adhesive by application devices 81-87. It is also possible to bond appropriate components by ultrasonic waves, heat sealing, etc. instead of adhesives at appropriate times. The first to fourth absorbent sheets 50, 20, 60, 40 and the continuous body 14a can be formed without adhesive bonding or adhesive bonding.

[0078] For the absorbent body 10a, the types and amounts of absorbent materials and the number of sheets can be increased compared to Example 1. Therefore, variations of the absorbent body can be increased.

[0079] In Example 2, just like Example 1, one or more of the first to third wrapping sheets 54, 24, 64 may be omitted. The number of the first sheets 52a-52c and / or the third sheets 62a-63c may be one, two, four or more. A continuous body 14 may be formed in which the second absorbent sheet 20 and the fourth absorbent sheet 40 overlap each other and the carrier sheet 12 is omitted.

[0080] Embodiment 3: will combine Figure 6 and Figure 7 , a method for producing an absorbent body 10b in which the first absorbent sheet 30 and the second absorbent sheet 20 do not overlap each other in Example 3 of the present invention is described. Figure 6 This is an explanatory diagram of a method for producing the absorbent body 10b in Example 3. Figure 7(a) is a schematic plan view of the continuous body 14b and the absorbent body 10b. Figure 7 (b) Yes Figure 7 (a) is a schematic cross-sectional view taken along line BB.

[0081] like Figure 6 As shown, just as in Example 1, when forming the first absorbent sheet 30, the first absorbent material 33 is sandwiched between the first sheet 32a-32c and the first wrapping sheet 34, and the first absorbent material 33 is arranged in the first area 33a-33c of the first sheet 32a-32c; when forming the second absorbent sheet 20, the second absorbent material 23 is sandwiched between the second sheet 22 and the second wrapping sheet 24, and the second absorbent material 23 is arranged in the second area 23a, 23b of the second sheet 22.

[0082] Then, unlike in Embodiment 1, as indicated by arrow 31x, the first absorbent sheet 30 is cut to form a first component 31 including first regions 33a-33c and first absorbent material 33. At the same time, as indicated by arrow 21x, the second absorbent sheet 20 is cut to form a second component 21 including second regions 23a, 23b and second absorbent material 23.

[0083] Then, if Figure 6 and Figure 7 As shown, hot melt glue or adhesive is applied to one main surface 12s of the carrier sheet 12 by an application device 88, and then the second component 21 is attached to the central area of ​​the carrier sheet 12 at a predetermined interval. Then, the first component 31 is attached to the area between the second components 21 on the carrier sheet 12. Thus, a continuous body 14b including the first component 31 and the second component 21 is formed. At this time, the first component 31 is aligned with the second component 21 so that the first area 31 and the second area 21 are adjacent to each other in a plan view.

[0084] Then, both side portions 12 a , 12 b of the carrier sheet 12 in the width direction are folded and placed on the first absorbent sheet 30 , so that the first component 31 and the second component 21 are wrapped by the carrier sheet 12 .

[0085] Then, the continuous body 14b is cut at the cutting position 11 to form the absorbent body 10b. Thus, the absorbent body 10b provided with the first component 31 of the first absorbent sheet 30 and the second component 21 of the second absorbent sheet 20 can be formed.

[0086] As described above, just like Example 1, the production method of the absorbent body 10b in Example 3 includes: step 1, forming a first absorbent sheet 30 having a first absorbent material 33 arranged in a first area 33a-33c of at least one sheet among the first sheets 32a-32c; step 2, forming a second absorbent sheet 20 having a second absorbent material 23 arranged in a second area 23a, 23b of the second sheet 22; step 3, forming a continuous body 14b including the first absorbent sheet 30 and the second absorbent sheet 20, wherein the first area 33a-33c and the second area 23a, 23b are adjacent to each other in a plan view; and step 4, cutting the continuous body 14b to include the first area 33a-33c and the second area 23a, 23b adjacent to each other, thereby forming an absorbent body 10b including the first absorbent material 33 and the second absorbent material 23.

[0087] Specifically, different from Example 1, the method in Example 3 further includes: step 5, after step 1 and before step 3, cutting the first absorbent sheet 30 to form a first component 31 including first regions 33a-33c; and step 6, after step 2 and before step 3, cutting the second absorbent sheet 20 to form a second component 21 including second regions 23a, 23b. In step 3, a continuous body 14b in which the first component 31 and the second component 21 are aligned is formed so that the first regions 33a-33c and the second regions 23a, 23b are adjacent to each other in a plan view.

[0088] As in Embodiment 1, preferably, in step 1, the first absorbent material 33 is disposed on a plurality of first sheets 32a-32c. In step 3, a continuous body 14 is formed in which a plurality of first sheets 32a-32c are disposed at intervals.

[0089] Meanwhile, as in Embodiment 1, preferably, in step 1, the first absorbent material 33 is disposed in a plurality of rows of first areas 33a-33c aligned along the continuous direction 32x of the first sheets 32a-32c. In step 2, the second absorbent material 23 is disposed in the second areas 22a, 22b aligned along the continuous direction 22x of the second sheets 22.

[0090] Meanwhile, as in Embodiment 1, preferably, in step 1, the first wrapping sheet 34 is joined to the first sheets 32a-32c to form the first absorbent sheet 30 having the first absorbent material 33 disposed between the first sheets 32a-32c and the first wrapping sheet 34.

[0091] Meanwhile, as in Embodiment 1, preferably, in step 2, the second wrapping sheet 24 and the second sheet 22 are joined to form the second absorbent sheet 20 having the second absorbent material 23 disposed between the second sheet 22 and the second wrapping sheet 24 .

[0092] According to the absorbent production method in Example 3, since a continuous body 14b in which the first absorbent sheet 30 and the second absorbent sheet 20 do not overlap each other is formed, the thickness of the absorbent 10b can be reduced compared to Example 1, and the sheet material used for the absorbent 10b can also be reduced.

[0093] Embodiment 4: will combine Figure 8 and Fig. 9 A method for producing an absorbent body according to the present invention according to Example 4 is described. In Example 4, an absorbent body 10c is produced while omitting the second covering sheet 24 in Example 1. Figure 8 It is a schematic diagram for explaining the method for producing the absorbent body 10c. Fig. 9 (a) is a schematic plan view of the continuum 14c and the absorbent 10c. Fig. 9 (b) Yes Fig. 9 (a) is a schematic cross-sectional view taken along line CC.

[0094] like Figure 8 and Fig. 9 As shown, just as in Embodiment 1, a first absorbent sheet 30 is formed in which a first absorbent material 33 is sandwiched between first sheets 32a-32c and a first covering sheet 34, and the first absorbent material 33 is disposed in first regions 33a-33c of the first sheets 32a-32c.

[0095] The second absorbent sheet 20a is formed in a similar manner to Example 1 by replacing the second wrapping sheet 24 in Example 1 with the carrier sheet 12. That is, the second sheet 22 is conveyed in the direction 22x in which the second sheet 22 continues, and the carrier sheet 12 which is wider than the second sheet 22 is conveyed in the direction 12x in which the carrier sheet 12 continues. Then, as Figure 8 As shown by arrow 23x in FIG. 1 , the second absorbent material 23 is intermittently supplied to the second sheet 22 and / or the carrier sheet 12. Then, the second sheet 22 is placed in the central area of ​​one main surface 12s of the carrier sheet 12 in the width direction to form the second absorbent sheet 20a. Thus, the second absorbent sheet 20a is formed, wherein the second absorbent sheet 23 is sandwiched between the second sheet 22 and the carrier sheet 12, and the second absorbent material 23 is arranged in the second areas 23a, 23b of the second sheet 22.

[0096] Then, the second absorbent sheet 20a is conveyed in the direction 20x in which the second absorbent sheet 20a continues. Then, the first absorbent sheet 30 coated with hot melt glue or adhesive is attached to the second absorbent sheet 20a by the application device 83 so as to overlap with the second sheet 22 of the second absorbent sheet 20a. Thus, a continuous body 14c including the first absorbent sheet 30 and the second absorbent sheet 20a is formed.

[0097] At this time, the first absorbent sheet 30 and the second absorbent sheet 20a are overlapped so that the first areas 33a-33c having the first absorbent material 33 arranged on the first absorbent sheet 30 and the second areas 23a, 23b having the second absorbent material 23 arranged on the second absorbent sheet 20a are adjacent to each other in a plan view, so that the first areas 33a-33c and the second areas 23a, 23c are arranged between adjacent cutting positions 11.

[0098] Then, hot melt glue or adhesive is applied to the second absorbent sheet 20a and / or the first absorbent sheet 30 by the application device 85, and then the portions 12a, 12b of the carrier sheet 12 protruding from both sides of the first absorbent sheet 30 are folded and placed on the first absorbent sheet 30. Thus, the continuous body 14c has the first absorbent sheet 30 and the second absorbent sheet 20a wrapped by the carrier sheet 12.

[0099] Then, the continuous body 14c is cut at the cutting position 11 to form the absorbent body 10c. Thus, the absorbent body 10c provided with the first absorbent material 33 and the second absorbent material 23 can be formed.

[0100] It is also possible to omit a part or all of the applicators 81-83, 85. Appropriate components may be bonded by ultrasonic waves, heat sealing instead of adhesives at appropriate times. The first absorbent sheet 30 and / or the second absorbent sheet 20a and the continuous body 14c may be formed without adhesive bonding or adhesive bonding.

[0101] In Embodiment 4, by omitting the second covering sheet 24, variations of the absorbent body 10c can be increased. At the same time, the production material of the absorbent body 10c can also be reduced.

[0102] [Overview] The above-mentioned production methods of absorbent bodies can increase the variation of absorbent bodies.

[0103] The present invention is not limited to the above-described embodiments but can be implemented by making various modifications.

[0104] For example, the first to fourth sheets may be non-nonwoven fabrics. Meanwhile, a continuous body may be formed by cutting any one of the first absorbent sheet and the second absorbent sheet into sheets without cutting the other into sheets, and then cutting the continuous body to form an absorbent body. Reference numerals

[0105] 10, 10a, 10b, 10c Absorber 14, 14a, 14b, 14c continuum 20, 20a second absorbent sheet 21 Second Part 22 Second sheet 23. Secondary Absorbent Material 23a, 23b, 23u-23w Second area 24 Second covering sheet 30. First absorbent sheet 31 First Part 32a-32c First sheet 33. First Absorbent Material 33a-33d, 33m, 33n, 33p-33r, 33u-33w first area 34 first covering sheet

Claims

1. A method for producing an absorbent body, characterized in that: The method includes: Step 1: forming a first absorbent sheet having a first absorbent material disposed in a first region of the first sheet; Step 2: forming a second absorbent sheet having a second absorbent material disposed in a second region of the second sheet; Step 3: forming a continuous body including the first absorbent sheet and the second absorbent sheet, wherein the first region and the second region are adjacent to each other in a plan view; and Step 4: Cutting the continuous body to include the first region and the second region adjacent to each other, thereby forming an absorbent body including the first absorbent material and the second absorbent material.

2. The method for producing an absorbent body according to claim 1, characterized in that: In the step 3, the continuous body in which the first absorbent sheet and the second absorbent sheet overlap each other is formed so that the first region and the second region are adjacent to each other in a plan view.

3. The method for producing an absorbent body according to claim 1, characterized in that: The method further includes: Step 5, after step 1 and before step 3, cutting the first absorbent sheet to form a first component including the first region; and Step 6, after step 2 and before step 3, cutting the second absorbent sheet to form a second component including the second area; Wherein, in the step 3, the continuum in which the first component and the second component are aligned is formed so that the first region and the second region are adjacent to each other in a plan view.

4. The method for producing an absorbent body according to any one of claims 1 to 3, characterized in that: In the step 1, the first absorbent material is disposed on a plurality of the first sheets; In the step 3, a plurality of the first sheets are formed into a continuous body arranged at intervals.

5. The method for producing an absorbent body according to any one of claims 1 to 4, characterized in that: In the step 1, the first absorbent material is arranged in a plurality of rows and intervals in the first region aligned along a continuous direction of the first sheet; In the step 2, the second absorbent material is disposed in the second regions aligned at intervals along a continuous direction of the second sheet material.

6. The method for producing an absorbent body according to any one of claims 1 to 5, characterized in that: In the step 1, a first wrapping sheet is joined to the first sheet to form the first absorbent sheet having the first absorbent material disposed between the first sheet and the first wrapping sheet.

7. The method for producing an absorbent body according to any one of claims 1 to 6, characterized in that: In the step 2, a second wrapping sheet is joined to the second sheet to form the second absorbent sheet having the second absorbent material disposed between the second sheet and the second wrapping sheet.

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