Daio Paper‘s patented method involves manufacturing absorbent articles with improved appearance and flexibility. By stacking an elastic film between two sheet layers, the structure includes stretchable and non-stretchable regions, enhancing elasticity. Through a specific welding process, the non-stretchable region maintains integrity while allowing stretching in the desired direction. GlobalData’s report on Daio Paper gives a 360-degree view of the company including its patenting strategy. Buy the report here.

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According to GlobalData’s company profile on Daio Paper, Incontinence monitoring sensors was a key innovation area identified from patents. Daio Paper's grant share as of January 2024 was 74%. Grant share is based on the ratio of number of grants to total number of patents.

Elastic film stretchable structure for absorbent articles

Source: United States Patent and Trademark Office (USPTO). Credit: Daio Paper Corp

A recently granted patent (Publication Number: US11819391B2) discloses a method for manufacturing an absorbent article that involves stacking an elastic film between two sheet layers to create a stretchable structure. The method includes stretching the elastic film in a machine direction, forming sheet bond portions in the stretchable region, and performing a welding process in the non-stretchable region to create perforations. These perforations are then fractured by the tensile force applied during the stretching of the elastic film, resulting in the formation of sheet bond portions between the two sheet layers.

Furthermore, the patented method specifies the characteristics of the elastic film used, including tensile strength and elongation properties in both the machine direction and cross direction. The welding process is carried out using a welding process device on a production line, with specific welding patterns and intervals between welding points to ensure the desired outcome. The method aims to efficiently manufacture absorbent articles with improved stretchability and durability, offering a novel approach to the production process in the absorbent article industry.

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GlobalData Patent Analytics tracks bibliographic data, legal events data, point in time patent ownerships, and backward and forward citations from global patenting offices. Textual analysis and official patent classifications are used to group patents into key thematic areas and link them to specific companies across the world’s largest industries.