Manufacturing method of disposable wearable article

Abstract

The present invention relates to a method for manufacturing a disposable wearable article, in which a stretchable composite sheet is formed in a stably stretched state when the stretched stretchable composite sheet is processed at a predetermined period. A stretchable composite sheet (8) is prepared in which non-woven fabric sheets (4, 6) and a stretchable elastic member (3) are bonded to each other at a plurality of spaced locations such that when tension is not applied to the elastic member (3), wrinkles are formed on the non-woven fabric sheets (4, 6), and then the non-woven fabric sheets (4, 6) are fed to a production line (20) in a state of being stretched to a first stretch rate (S1), thereby manufacturing a disposable article. In the production line (20), after the stretchable composite sheet (8) stretched to the first stretch rate (S1) is relaxed to a second stretch rate (S2) lower than the first stretch rate (S1), the stretchable composite sheet (8a) is stretched, and then the stretched stretchable composite sheet (8b) is stretched to a third stretch rate (S3) higher than the first stretch rate (S1). The stretchable composite sheet (8d) stretched to the third stretch rate (S3) is then processed at a predetermined cycle.

Description

Technical Field

[0001] This invention relates to a method for manufacturing disposable wearable articles, and more specifically, to a method for manufacturing disposable wearable articles using a stretchable composite sheet. Background Technology

[0002] In one existing method of applying a stretchable composite sheet to disposable wearable items such as diapers, the stretchable composite sheet is formed by laminating and pressing a stretchable sheet with a non-stretchable sheet while the stretchable sheet is in a stretched state, and then joining them at appropriate positions (see, for example, Patent Document 1).

[0003] In addition, we also know of techniques for stretching substrate sheets. Figure 4 This is an enlarged schematic diagram of the main parts of the stretching processing device. Figure 4 The stretching apparatus shown is a gear stretching apparatus, in which teeth 113 and 115 are formed on the outer peripheral surfaces of a pair of processing rollers 112 and 114. The pair of processing rollers 112 and 114 rotate synchronously in the directions indicated by arrows 112r and 114r, so that the teeth 113 and 115 mesh together with a gap. The substrate sheet is conveyed along the conveying channel 103 shown by the dashed line in the direction indicated by arrow 102x. When the substrate sheet passes through the meshing portion 112b of the teeth 113 and 115 of the processing rollers 112 and 114 that mesh together with a gap, it is stretched in the conveying direction, and a stretching process is performed (see, for example, Patent Document 2).

[0004] Japanese Patent Document 1: International Publication No. 2019 / 150801. Japanese Patent Document 2: International Publication No. 2022 / 113994. Summary of the Invention

[0005] Existing technology involves stretching the non-stretchable sheet of a stretchable composite material for manufacturing disposable wearable items such as diapers. In this technology, the stretched composite material is simultaneously cut into predetermined shapes or fitted with other components at predetermined intervals. If the stretching of the composite material is unstable during the predetermined processing cycle, misalignment or deviations in the processed shape can occur, leading to inconsistent shapes and quality in the finished disposable wearable items.

[0006] The purpose of this invention is to provide a method for manufacturing disposable wearable items, which can keep the stretchability of the stretchable composite sheet stable when the stretchable composite sheet is processed at a predetermined cycle.

[0007] To address the aforementioned issues, the present invention provides a method for manufacturing a disposable wearable article having the following configuration.

[0008] A method for manufacturing a disposable wearable article includes: (i) Step 1: preparing a stretchable composite sheet, wherein a nonwoven sheet and a stretchable elastic member are bonded together at multiple spaced-apart locations, such that wrinkles are formed on the nonwoven sheet when no tension is applied to the elastic member; (ii) Step 2: feeding the stretchable composite sheet to a production line while it is stretched to a first stretch rate; (iii) Step 3: processing the stretchable composite sheet on the production line to manufacture a disposable wearable article. Step 3 includes the following steps: (a) relaxing the stretchable composite sheet stretched to the first stretch rate to a second stretch rate lower than the first stretch rate, and then stretching the nonwoven sheet of the stretchable composite sheet; (b) after stretching, stretching the stretchable composite sheet to a third stretch rate higher than the first stretch rate; (c) processing the elastic composite sheet stretched to the third stretch rate at predetermined intervals.

[0009] Using the above method, the nonwoven sheet of the stretchable composite sheet will elongate due to stretching processing. However, by stretching the stretchable composite sheet to a third stretching rate higher than the first stretching rate, the stretchable composite sheet can be kept in a stable stretched state when it is processed at predetermined intervals.

[0010] In a preferred embodiment, the elastic component of the stretchable composite sheet is a film.

[0011] In this configuration, the wrinkles created by the stretchable composite sheet during shrinkage can be aesthetically pleasing, thereby enhancing the appearance of disposable wearable items. Furthermore, it can improve the fit of disposable wearable items.

[0012] Preferably, the elastic member of the stretchable composite sheet is formed by extruding molten resin and cooling and solidifying it, and after cooling and solidification, it is stretched to a first elongation.

[0013] More preferably, the elastic member stretched to a first elongation ratio is sandwiched between two nonwoven sheets, and the elastic member and the nonwoven sheets are heat-fused together at a plurality of spaced locations to form the stretchable composite sheet.

[0014] In other preferred embodiments, a tension adjusting device is provided between the stretching processing device for stretching the nonwoven sheet of the stretchable composite sheet and the stretching device for stretching the stretched composite sheet to a third stretch ratio, for adjusting the tension of the stretchable composite sheet to a predetermined value. The tension adjusting device is used to maintain the stretchable composite sheet, after being stretched by the stretching processing device, at the first stretch ratio while supplying it to the stretching device.

[0015] In this case, the stretchability of the composite sheet is stable.

[0016] In other preferred embodiments, a stretching device located near a processing apparatus for processing the stretchable composite sheet at predetermined intervals is used to stretch the stretchable composite sheet after stretching to the third stretch ratio.

[0017] In this case, the step of stretching the stretched composite sheet to a third elongation rate can be performed near the upstream side of the step of processing the stretchable composite sheet at a predetermined cycle. Since the stretchable composite sheet stretched to the third elongation rate is periodically processed, the conveying of the stretchable composite sheet can be prevented from becoming unstable.

[0018] In other preferred embodiments, the stretchable composite sheet is stretched to a third elongation rate, thereby eliminating wrinkles in the nonwoven sheet of the stretchable composite sheet.

[0019] In this case, the stretchable composite sheet can be processed at a predetermined cycle while it is in a state of tensile stability.

[0020] In other preferred embodiments, in step 1, a sheet storage area is prepared at a predetermined location adjacent to or within the production line for storing the stretchable composite sheet. In step 2, the stretchable composite sheet is pulled out from the sheet storage area at the predetermined location, stretched to the first stretch ratio, and then supplied to the production line.

[0021] In this configuration, the area for producing stretchable composite sheets and preparing the sheet storage area can be separated from the production line. Since the sheet storage area can be pre-formed and retained, production management of stretchable composite sheets becomes much easier.

[0022] By employing this invention, when the stretched elastic composite sheet is processed at predetermined intervals, a stable stretched state of the elastic composite sheet can be achieved. Therefore, disposable wearable items with consistent quality can be produced. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the offline machine in Embodiment 1 of the present invention. Figure 2 This is a schematic diagram of the online machine in Embodiment 1 of the present invention. Figure 3 This is a configuration diagram of the offline machine and the online machine in Embodiment 1 of the present invention. Figure 4 This is an enlarged view of the main components of a stretching processing device in the prior art. Detailed Implementation

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

[0025] Example 1: As Figures 1-3 As shown, the manufacturing method of the disposable wearable article of the present invention will be described below. Figure 1 This is a schematic diagram of the offline machine 10. Figure 2 This is a schematic diagram of online machine 20. Figure 3 This is a configuration diagram of offline machine 10 and online machine 20.

[0026] like Figure 1 and Figure 2 As shown, the stretchable composite sheet 8 will be produced using the offline machine 10. The produced stretchable composite sheet 8 will be conveyed along the direction indicated by arrow 8x and supplied to the online machine 20. The online machine 20 will constitute a production line for processing the stretchable composite sheet 8 and producing disposable wearable items. The offline machine 10 and the online machine 20 can be constructed using known devices and equipment. Here, the offline machine 10 will supply the stretchable composite sheet 8 to the online machine 20 and will be located separately from the online machine 20.

[0027] like Figure 1 As shown, the offline machine 10 includes an extrusion device 12, a cooling roller 14, a first drive roller 16 and a first clamping roller 16a, a second drive roller 18, a hot melt device 17, and a guide roller 19.

[0028] As indicated by arrow 12x, the extrusion device 12 supplies resin material particles, heats and melts the resin particles, and then extrudes the heated and melted resin material from the die lip 12b of the mold 12a into a sheet, forming a sheet-like intermediate 2. The cooling roller 14 cools and solidifies the intermediate 2. Thus, an elastic member 3 is formed from the intermediate 2. The elastic member 3 is, for example, a film. After being pulled out from the cooling roller 14, the elastic member 3 is conveyed to the second drive roller 18 between the first drive roller 16 and the first clamping roller 16a.

[0029] The cooling roller 14, the first drive roller 16, and the second drive roller 18 will be driven to rotate synchronously. The elastic member 3 is stretched to a first stretch ratio S1 between the first drive roller 16 and the second drive roller 18. That is, the circumferential speed of the second drive roller 18 will be greater than the circumferential speed of the first drive roller 16.

[0030] The elastic member 3 and the first and second nonwoven sheets 4 and 6 are supplied to the second drive roller 18, such that the elastic member 3 is sandwiched between the first nonwoven sheet 4 and the second nonwoven sheet 6. That is, the first nonwoven sheet 4 is supplied along the outer peripheral surface of the second drive roller 18, and the elastic member 3 is superimposed on it during supply, thereby forming a first laminate 5 of the first nonwoven sheet 4 and the elastic member 3 stacked together. Furthermore, the second nonwoven sheet 6 is stacked on top of the first laminate 5 and supplied, forming a second laminate 7 of the first laminate 5 and the second nonwoven sheet 6 stacked together. A predetermined pattern of raised portions is formed on the outer peripheral surface of the second drive roller 18. When the second laminate 7 passes the position facing the heat-sealing device 17, the heat-sealing device 17 bonds the elastic member 3 and the first and second nonwoven sheets 4 and 6 together according to the pattern of the raised portions formed on the outer peripheral surface of the second drive roller 18. This will form a stretchable composite sheet 8. The hot-melt device 17 can be an ultrasonic welding device.

[0031] The elastic member 3 of the stretchable composite sheet 8 is bonded to the first and second nonwoven sheets 4 and 6 in a stretched state. When the stretched state is released, the elastic member 3 of the stretchable composite sheet 8 will shrink to its natural length to which no tension is applied, and the entire stretchable composite sheet 8 will shrink. At this time, the distance between the multiple bonding points between the elastic member 3 and the first and second nonwoven sheets 4 and 6 will shorten in the shrinkage direction of the elastic member 3. Therefore, in the stretchable composite sheet 8, when no tension is applied to the elastic member 3, wrinkles will form on the first and second nonwoven sheets 4 and 6.

[0032] With the elastic member 3 stretched to the first elongation rate S1, the stretchable composite sheet 8, after being bonded to the first and second nonwoven sheets 4 and 6, is conveyed while the elastic member 3 is stretched to the first elongation rate S1, and is fed to the online machine 20 via the guide roller 19 in the direction indicated by arrow 8x.

[0033] In addition to forming a film-like elastic member 3 from the sheet-like intermediate 2, the heated and molten resin material can be extruded from multiple die lips 12b of the mold 12a in the form of a line or strip, and after cooling and solidification, multiple elastic members 3 are formed. Then, the elastic members 3 are stretched to the first elongation rate S1 and bonded to the first and second nonwoven sheets 4 and 6 to form a stretchable composite sheet 8.

[0034] like Figure 2 As shown, the inline machine 20 is configured such that the stretchable composite sheet 8 sequentially passes through the third drive roller 21 and the third pinch roller 21a, the stretching processing device 22, the fourth drive roller 23 and the fourth pinch roller 23a, the tension adjusting device 24, the stretching device 26, and the processing device 28. The inline machine 20 further conveys the sheet passing through the processing device 28 in the direction indicated by arrow 8k and processes it appropriately using other processing devices (not shown) to manufacture a disposable wearable item. The processing device 28 is a phase processing device that performs intermittent processing of the stretchable composite sheet 8 according to a predetermined cycle corresponding to each piece of the disposable wearable item; it is the first phase processing device to process the stretchable composite sheet 8.

[0035] The third drive roller 21 is driven to rotate, so that the stretchable composite sheet 8 supplied to the online machine 20 is conveyed in the state of the first stretch ratio S1 to pass through the third drive roller 21 and the third pinch roller 21a.

[0036] The fourth drive roller 23 is driven to rotate, such that the circumferential speed of the fourth drive roller 23 is less than the circumferential speed of the third drive roller 21. As a result, the stretchable composite sheet 8a located between the third drive roller 21 and the fourth drive roller 23 is relaxed to a second stretch rate S2, which is less than the first stretch rate S1. That is, the stretch rate of the elastic member 3 of the stretchable composite sheet 8a becomes the second stretch rate S2.

[0037] The stretching processing device 22 is a type of... Figure 4 The stretching device 22 is a gear-type stretching device with a pair of gear-shaped members 22a and 22b that mesh with each other with a certain gap. When the stretchable composite sheet 8a, relaxed to the second stretch ratio S2, passes between the pair of gear-shaped members 22a and 22b of the stretching device 22, the first and second nonwoven sheets 4 and 6 of the stretchable composite sheet 8a will be stretched. Through stretching, the stretchability of the first and second nonwoven sheets 4 and 6 of the stretchable composite sheet 8a will be improved compared to before stretching.

[0038] The tension adjustment device 24 will adjust the tension of the stretchable composite sheet 8b so that the stretchable composite sheet 8b after stretching is maintained at the second elongation rate S2. Thus, the stretchable composite sheet 8b stretched to the second elongation rate S2 is supplied to the stretching device 26.

[0039] The stretching device 26 stretches the supplied stretchable composite sheet 8c to a third stretch ratio S3. The stretching device 26, for example, has drive rollers 26a and 26b and pinch rollers 26p and 26q on the upstream and downstream sides of the stretchable composite sheet 8c, and stretches the stretchable composite sheet 8c between the drive rollers 26a and 26b to the third stretch ratio S3 by utilizing the circumferential speed difference between the upstream and downstream drive rollers 26a and 26b. The stretchable composite sheet 8d is conveyed by the stretching device 26 in a state stretched to the third stretch ratio S3.

[0040] The processing device 28 processes the stretchable composite sheet 8d, which has been stretched to the third stretch S3, at predetermined intervals. For example, the processing device 28 has a pair of cutters 28a and 28b, each cutter having a cutting blade formed at an appropriate position on its outer periphery. The cutters rotate to cut out a portion of the stretchable composite sheet 8d. Thus, a predetermined shape is formed on the stretchable composite sheet 8d, which has been stretched to the third stretch rate S3, at predetermined intervals in the conveying direction.

[0041] Figure 3 This is a schematic diagram showing the layout of offline machine 10 and online machine 20.

[0042] like Figure 3 As shown in (a), the offline machine 10 and the online machine 20 are arranged adjacent to each other. The stretchable composite sheet 8 continuously produced by the offline machine 10 is continuously supplied to the online machine 20 as shown by arrow 8x. The online machine 20 continuously processes the stretchable composite sheet 8 to produce disposable wearable items.

[0043] like Figure 3 As shown in (b), the area where the offline machine 10 produces the stretchable composite sheet 8 can be separated from the area where the online machine 20 is arranged and the stretchable composite sheet 8 is processed. In this case, the stretchable composite sheet 8 produced by the offline machine 10 is stored, forming one or more sheet storage sections 9 for storing the stretchable composite sheet 8. The sheet storage section 9 can be provided as needed, as shown by arrow 9x, at a predetermined position 20a adjacent to the online machine 20, or at a predetermined position not shown in the online machine 20. The stretchable composite sheet 8 pulled out from the sheet storage section 9 provided at the predetermined position 20a is supplied to the online machine 20 for processing. Since the sheet storage section 9 can be formed and retained in advance, the production management of the stretchable composite sheet 8 becomes easier.

[0044] A method for manufacturing disposable wearable items using offline machine 10 and online machine 20 can be performed, the method comprising the following steps 1 to 3.

[0045] (i) In step 1, elastic composite sheets 8 are prepared to be bonded together at multiple spaced locations, such that nonwoven sheets 4 and 6 and elastic members 3 form wrinkles on nonwoven sheets 4 and 6 without applying tension to elastic members 3.

[0046] The elastic member 3 of the stretchable composite sheet 8 is, for example, a film. In this case, compared with the use of linear or strip-shaped elastic members, disposable wearable items with aesthetically pleasing wrinkles, superior appearance, and excellent feel can be obtained. Figure 1 As shown, the elastic member 3 of the stretchable composite sheet 8 is formed by extruding molten resin and cooling and solidifying it, and then stretching it to a first elongation S1 after cooling and solidification. The elastic member 3 stretched to the first elongation S1 is then sandwiched between two nonwoven fabric sheets 4 and 6, and the elastic member 3 is heat-fused to the nonwoven fabric sheets 4 and 6 at multiple spaced intervals to form the stretchable composite sheet 8. Alternatively, one of the nonwoven fabric sheets 4 or 6 can be omitted to form the stretchable composite sheet 8.

[0047] (ii) In step 2, the stretchable composite sheet 8 is supplied to the online machine 20 constituting the production line while it is stretched to the first stretch ratio S1.

[0048] (iii) In step 3, the stretchable composite sheet 8 is processed on the production line to manufacture disposable items. At this time, (a) the stretchable composite sheet 8 stretched to a first stretch rate S1 is relaxed to a second stretch rate S2 lower than the first stretch rate S1, and then the non-woven sheets 4 and 6 of the stretchable composite sheet 8a are stretched; (b) the stretched stretchable composite sheet 8b is stretched to a third stretch rate S3 higher than the first stretch rate S1; (c) the stretchable composite sheet 8d stretched to the third stretch rate S3 is processed at a predetermined cycle.

[0049] By stretching the stretchable composite sheet 8 to a first stretch ratio S1 using the above method, the folds of the nonwoven fabric sheets 4 and 6 of the stretchable composite sheet 8 can be unfolded, thereby enabling stable conveying of the stretchable composite sheet 8. During the stretching process, by relaxing the stretchable composite sheet 8a to a second stretch ratio S2, which is lower than the first stretch ratio S1, stable stretching can be performed without damaging the stretchable composite sheet 8a.

[0050] Through stretching, the nonwoven sheets 4 and 6 of the stretch composite sheet 8a will be unfolded. By stretching the stretched composite sheet 8b to a third stretch rate S3, which is higher than the first stretch rate S1, the wrinkles of the nonwoven sheets 4 and 6 of the stretch composite sheet 8d can be unfolded. In this way, the stretched state of the stretch composite sheet 8d can be stabilized. Therefore, when the stretch composite sheet stretched to the third stretch rate S3 is processed at a predetermined cycle, a stable stretched state of the stretch composite sheet can be formed.

[0051] To explain in more detail, such as Figure 2 As shown, a tension adjusting device 24 is provided between the stretching processing device 22, which stretches the nonwoven sheets 4 and 6 of the stretchable composite sheet 8a, and the stretching device 26, which stretches the stretched composite sheet 8b to a third stretch ratio S3, to adjust the tension of the stretchable composite sheet 8b to a predetermined value. The tension adjusting device 24 maintains the stretchable composite sheet 8b, which has been stretched by the stretching processing device 22, at a first stretch ratio S1 while supplying it to the stretching device 26. Therefore, even if the tension of the elastic member 3 of the stretchable composite sheet 8b changes during stretching, this tension change can be prevented from being transmitted to the stretching device 26, thereby ensuring that the stretching device 26 performs stable stretching of the stretchable composite sheet 8b.

[0052] The stretching device 26 is preferably located near the processing device 28. This is because if the processing device 28 that processes the stretchable composite sheet 8d separates from the stretching device 26 that supplies the stretchable composite sheet 8d to the processing device 28, the stretchable composite sheet 8d may vibrate due to the periodic processing of the processing device 28, resulting in significant quality fluctuations in the disposable wearable sample.

[0053] Specifically, a stretching device 26, located near the processing apparatus 28 that processes the stretchable composite sheet 8d, stretches the stretched composite sheet 8c to a third stretch ratio S3 at predetermined intervals. In this case, the step of stretching the stretched composite sheet 8c to the third stretch ratio can be performed near the upstream side of the step of processing the stretchable composite sheet 8d at predetermined intervals. Since the stretchable composite sheet 8d is periodically processed after being stretched to the third stretch ratio S3, the instability of the conveying of the stretchable composite sheet 8d can be prevented.

[0054] Preferably, the stretchable composite sheet 8d is stretched to a third elongation rate S3, thereby eliminating wrinkles in the nonwoven sheets 4 and 6 of the stretchable composite sheet 8d. In this case, the stretchable composite sheet 8d can be processed at a predetermined cycle while the nonwoven sheets 4 and 6 of the stretchable composite sheet 8d are in a state of stable stretching.

[0055] In a preferred embodiment, in step 1, a sheet storage section 9 is prepared at a predetermined position 20a adjacent to or within the online machine 20 constituting the production line to store the stretchable composite sheet 8. In step 2, the stretchable composite sheet 8, pulled from the sheet storage section 9 at the predetermined position, is stretched to a first stretch ratio S1 and then supplied to the online machine 20 constituting the production line. In this case, the area for producing the stretchable composite sheet 8 and preparing the sheet storage section 9 can be separated from the production line for producing the stretchable composite sheet 8. Since the sheet storage section 9 can be formed and retained in advance, the production management of the stretchable composite sheet 8 becomes easier.

[0056] The method for manufacturing disposable wearable items according to the present invention can maintain a stable stretched state of the stretched composite sheet 8d during processing at predetermined cycles. Accordingly, the present invention can perform high-precision processing on the stretched composite sheet 8d at predetermined cycles, thereby producing disposable items with stable quality.

[0057] Moreover, the present invention is not limited to the above-described embodiments, and various modifications can be made during implementation.

[0058] For example, the present invention can be implemented using devices with different configurations than the offline machine 10 and / or online machine 20 described in the embodiments.

[0059] Figure label: 3. Elastic Components 4, 6 Non-woven fabric sheets 8. 8a~8d stretchable composite sheet 9. Sheet storage area 10 Offline machines 20 in-line machines (production lines) 22 Stretching processing device 24. Tension Adjustment Device 26. Tensioning device 28. Processing equipment S1 First Elongation S2 Second Elongation S3 Third Elongation

Claims

1. A method for manufacturing disposable wearable items, characterized in that: It includes: Step 1: Prepare a stretchable composite sheet, wherein a nonwoven sheet is bonded to a stretchable elastic member at multiple spaced-apart locations, such that wrinkles are formed on the nonwoven sheet when no tension is applied to the elastic member; Step 2: The stretchable composite sheet is supplied to the production line while being stretched to the first elongation rate; Step 3: Process the stretchable composite sheet on the production line to manufacture disposable wearable items; wherein, Step 3 includes: relaxing the stretchable composite sheet stretched to a first elongation rate to a second elongation rate lower than the first elongation rate, and then stretching the nonwoven sheet of the stretchable composite sheet; after stretching, stretching the stretchable composite sheet to a third elongation rate higher than the first elongation rate; and processing the stretchable composite sheet stretched to the third elongation rate at predetermined intervals.

2. The method for manufacturing a disposable wearable article as described in claim 1, characterized in that: The elastic component of the stretchable composite sheet is a film.

3. The method for manufacturing a disposable wearable article as described in claim 2, characterized in that: The elastic member of the stretchable composite sheet is formed by extruding molten resin and cooling and solidifying it, and after cooling and solidification, it is stretched to the first elongation.

4. The method for manufacturing a disposable wearable article as described in claim 3, characterized in that... The elastic member stretched to the first elongation rate is sandwiched between two sheets of nonwoven fabric, and the elastic member and the nonwoven fabric sheets are heat-fused together at multiple spaced locations to form the stretchable composite sheet.

5. The method for manufacturing a disposable wearable article as described in claim 2, characterized in that... A tension adjusting device is provided between a stretching processing device for stretching the nonwoven sheet of the stretchable composite sheet and a stretching device for stretching the stretched composite sheet to the third stretch ratio. The tension adjusting device is used to maintain the stretchable composite sheet, after being stretched by the stretching processing device, at the first stretch ratio while supplying it to the stretching device.

6. The method for manufacturing a disposable wearable article as described in claim 2, characterized in that... Using a stretching device located near a processing apparatus for processing the stretchable composite sheet at predetermined intervals, the stretchable composite sheet after stretching is stretched to the third stretch rate.

7. The method for manufacturing a disposable wearable article as described in claim 1, characterized in that... The stretchable composite sheet is stretched to a third elongation rate, thereby eliminating wrinkles in the nonwoven sheet of the stretchable composite sheet.

8. The method for manufacturing a disposable wearable article as described in any one of claims 1 to 7, characterized in that: In step 1, a sheet storage area is prepared at a predetermined location near the production line or at a predetermined location within the production line for storing the stretchable composite sheet. In step 2, the stretchable composite sheet is pulled out from the sheet storage area located at the predetermined position, stretched to the first stretch ratio, and then supplied to the production line.

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