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Production method for fused sheet and production method for absorbent article

A manufacturing method, a technology of sheet welding, applied in the fields of absorbent pads, medical science, clothing, etc., can solve the problem of how to fix the unrecorded film superimposed body

Active Publication Date: 2016-06-15
KAO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, Patent Document 2 does not describe how the laminated film is fixed when irradiated with laser light. Patent Document 2 suggests that the laminated film in an unfixed free state is irradiated with laser light to cut (fuse) it.

Method used

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  • Production method for fused sheet and production method for absorbent article
  • Production method for fused sheet and production method for absorbent article
  • Production method for fused sheet and production method for absorbent article

Examples

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Embodiment Construction

[0023] In practice, a sheet-welded body in which a plurality of sheets are welded to each other in an overlapping state requires sufficient weld strength so that the plurality of sheets welded to each other at the welded portion will not be peeled apart during normal use. However, in the sheet welded body obtained by performing fusing and welding at the same time described in Patent Documents 2 and 3, the welded portion (sealing edge in which the edges of a plurality of sheets are welded in a state where the edges of the sheets are overlapped) formed by irradiating laser light Since the welding strength between the sheets of the part) is insufficient, the welded part may be broken during normal use and a plurality of sheets may be scattered. In addition, when the sheet welded body is used to manufacture products (sanitary products) that are used in contact with the skin, such as absorbent articles, the welded part is required to have good softness and skin feel, but in Patent D...

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PUM

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Abstract

The invention provides a production method for fused sheet. A band-shaped sheet laminate (10) is divided and, at the same time, a sealed edge section is formed, as a result of bringing one surface of the sheet laminate (10) in contact with a supporting member (21) having a slit-shaped opening (27) being a light-permeable section, and by irradiating a laser light via the opening (27). The opening (27) has: a narrow section (27c) having a smaller opening width than a sheet contact surface-side opening end (27a); and, formed between the narrow section (27c) and the opening end (27a), a space (27S) capable of accommodating an expansion section (10P) of the sheet laminate (10), expanded inside the opening (27) from the opening end (27a) as a result of pressurization.

Description

technical field [0001] The present invention relates to a method of manufacturing a sheet-welded body having a sealed edge portion in which edges of a plurality of sheets are welded in an overlapping state. Background technique [0002] At present, in the manufacturing process of absorbent articles such as disposable diapers and sanitary napkins, a heat roller device is commonly used for joining overlapping sheets. In addition, as another bonding method, a method of welding using a laser beam is also known. For example, Patent Document 1 describes a method of deforming a sheet laminate in which a plurality of sheets are stacked into a shape along the peripheral surface of a rotating roller having a laser-transmitting portion on the peripheral surface, and transporting it from the The inner side of the rotating roll irradiates the laser beam to the laminated sheet, and the sheets in the laminated sheet are fused together. [0003] In addition, Patent Document 2 describes th...

Claims

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Application Information

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IPC IPC(8): B29C65/16A61F5/44A61F13/15A61F13/49A61F13/496
CPCB29C66/83435A61F13/15739A61F13/496B29C65/1619B29C65/1648B29C65/1661B29C65/1696B29C65/7473B29C65/7894B29C66/1122B29C66/137B29C66/21B29C66/3472B29C66/431B29C66/723B29C66/7294B29C66/72941B29C66/83433B29L2031/4878
Inventor 今井康至浜本伸二梁岛拓郎小久保真
Owner KAO CORP
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