Flexible Sheet Used In Disposable Garment
Patent #: 6,468,626
Inventor(s): Hisashi Takai and Miou Suzuki
Company: Uni-Charm Corporation
Patented is a flexible sheet that can be used as a component of a disposable garment. The flexible plastic sheet comprises an upper and lower surface, a thickness of approximately 0.001- 0.05mm, a plurality of flat portions with widths of approximately 0.03-1mm and intermittent apertures. The apertures extend between the flat portions to form aperture rows that extend parallel to one another. The flat portions have aperture rows that are interconnected by several bridge portions, which extend between and across the aperture rows. The bridge portions extend across the respective aperture rows and are formed intermittently in a second direction orthogonal to the first, providing two types of bridge portions. The portions extend upward or downward from flat portions to the upper surfaces’ flat portions to form arcs.The intermittent apertures are defined by edges of the substantially flat portions, which extend in the first direction, and edges of the bridge portions extend in the second direction. The flat portions are formed along edges that extend in the first direction with a plurality of tooth-shaped portions, which extend upward from the flat portions’ upper surfaces. Circular projections extend convexly on the flexible plastic sheet’s upper surface, occupying approximately 5-70 % of the total surface area of the sheet. The projections are approximately 0.01-0.05mm in height and approximately 0.25-5mm in diameter. Each of the circular projections contains intermittent apertures and bridge elements. A fibrous layer is joined to the flexible plastic sheet’s lower surface and comprises component fibers that are assembled by mechanically inter-twining and heat-sealing. The fibrous layer features thermoplastic, synthetic, chemical and natural fibers and is partially exposed within the apertures of the flexible plastic sheet.
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