Absorbent article manufacturing method, absorbent article manufacturing device, and absorbent article

The method and apparatus for folding absorbent articles at specific points and adjusting transport speeds address shape variations and air resistance issues, resulting in a stable, compact, and leak-resistant pant-type absorbent article.

WO2026116421A1PCT designated stage Publication Date: 2026-06-04UNI CHARM CORP
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Patent Information

Application Number
PCT/JP2025/041332
Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
Priority Date
2024-11-29
Filing Date
2025-11-27
Publication Date
2026-06-04

AI Technical Summary

Technical Problem

The increase in conveying speed of absorbent articles leads to increased air resistance at the folded portions, causing shifts or wrinkles, resulting in shape variations during manufacturing.

Method used

A method and apparatus for manufacturing pant-type absorbent articles that involve folding the outer body in the width direction on both sides of the absorbent core, with specific folding steps and mechanisms to maintain the folded state, including folding one outer casing part at a point further outward than the absorbent core and then folding it again at a second point, and adjusting transport speeds to reduce air resistance.

Benefits of technology

This approach reduces shape variations and maintains a compact form of the absorbent article, enhancing stability and reducing leakage by ensuring the folded portions remain in place during transport and use.

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  • Figure JP2025041332_04062026_PF_FP_ABST
    Figure JP2025041332_04062026_PF_FP_ABST
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Abstract

Provided are an absorbent article manufacturing method capable of reducing variation in the shape of an absorbent article while folding the absorbent article in a width direction during conveyance thereof, an absorbent article manufacturing device, and an absorbent article. An underpants-type absorbent article manufacturing method (1) comprises: a step (a first width-folding step S21 and / or a third width-folding step S23) for, when an exterior body (50) is divided into two exterior body parts with the center in the width direction (W) as the boundary, folding one exterior body part of the two exterior body parts from the outside toward the inside in the width direction at one folding start point positioned on the outside in the width direction of one outer edge of an absorbent core; and a step (a second width-folding step S22 and / or a fourth width-folding step S24) for, after the step for folding the one exterior body part, folding one folded part, which is the portion of the one exterior body part that has been folded at the one folding start point, in the width direction at a folding start point positioned on the outside in the width direction of the one folding start point.
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Citation Information

Patent Citations

  • Package of underpants-type absorbent article

    JP2018102845A

  • Packaging

    JP3237241U

  • Folded absorbent article

    US20030036739A1

  • Method of Making an Absorbent Product

    US20170065462A1

  • Folding structure of disposable underpants and disposable underpants

    WO2004112518A1