# US 5,705,249 A · Liquid-permeable composite nonwoven fabric for use in body fluids absorptive articles > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 5,705,249 A - Document ID: US5705249A - Status: Granted - Kind: A - Application number: 08/590,979 - Filed: 1996-01-24 - Granted: 1998-01-06 - Earliest claimed: 1995-01-26 - Assignees: Uni-Charm Corporation - Inventors: Hisashi Takai; Hideki Kondo; Tomoko Tsuji - Web page: https://patentgrep.com/patent/US5705249A ## CPC - B32B 5/022: {Non-woven fabric} - A61F 13/51121: {characterised by the material} - B32B 3/30: characterised by a layer formed with recesses or projections, e.g. {hollows, grooves, protuberances, ribs (apertured layer B32B3/266; layer with cavities or internal voids B32B3/26)} - B32B 5/26: another layer {next to it} also being fibrous or filamentary {(relative arrangement of fibres or filaments of different layers B32B5/12)} - B32B 2307/726: Permeability to liquids, absorption - B32B 2307/7265: Non-permeable - B32B 2307/728: Hydrophilic - B32B 2307/73: Hydrophobic - Y10T 428/23971: Continuous strand with adhesive bond to backing - Y10T 428/24636: Embodying mechanically interengaged strand[s], strand-portion[s] or strand-like strip[s] [e.g., weave, knit, etc.] - Y10T 428/24669: Aligned or parallel nonplanarities - Y10T 428/24694: Parallel corrugations - Y10T 428/24711: Plural corrugated components - Y10T 428/249941: Fiber is on the surface of a polymeric matrix having no embedded portion - Y10T 428/249947: Polymeric fiber - Y10T 442/643: Including parallel strand or fiber material within the nonwoven fabric - B32B: LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM - A61F: FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS (dental prosthetics A61C) - Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION ## Abstract The liquid-permeable composite nonwoven fabric for use in the body fluids absorptive articles such as sanitary napkins comprises a liquid-permeable nonwoven fabric made from thermoplastic synthetic fibres and a plurality of continuous filaments made from thermoplastic synthetic resin being arranged parallel to one another and bonded to an upper surface of the nonwoven fabric at bonding zones arranged intermittently along and longitudinally of the respective filaments so that each filament may form bulges describing circular arcs above the nonwoven fabric. ## Claims ### Claim 1 A liquid-permeable composite nonwoven fabric for use in body fluids absorptive articles comprising a liquid-permeable nonwoven fabric including thermoplastic synthetic fibers and a plurality of continuous filaments made of thermoplastic synthetic resin, said filaments bonded to an upper surface of said liquid-permeable fibrous nonwoven fabric, wherein: said filaments extend longitudinally along said fibrous nonwoven fabric, said filaments being generally parallel to one another, each of said filaments fixedly attached to the upper surface of said fibrous nonwoven fabric at bonding zones, said bonding zones intermittently arranged along the longitudinally extending filaments so as to form, between each pair of adjacent said bonding zones along each of said filaments, a bulge forming a generally circular arc above the upper surface of said fibrous nonwoven fabric and having a substantially circular shape in its radial cross-section; and said bonding zones being relatively thin and flat, first portions of said nonwoven fabric underlying said bonding zones being thinner than second portions of said nonwoven fabric surrounding said first portions and having a higher density than that of the second portions. ### Claim 2 (depends on 1) A composite nonwoven fabric according to claim 1, wherein said filaments are welded to the upper surface of said nonwoven fabric. ### Claim 3 (depends on 1) A composite nonwoven fabric according to claim 1, wherein both said filaments and said nonwoven fabric are hydrophobic. ### Claim 4 (depends on 1) A composite nonwoven fabric according to claim 1, wherein said filaments are hydrophobic and said nonwoven fabric is hydrophilic. ### Claim 5 (depends on 1) The liquid permeable composite nonwoven fabric of claim 1, wherein said bonding zones of adjacent respective filaments are transversely aligned with one another. ### Claim 6 A body fluids absorptive article, comprising a. a topsheet in the form of a liquid permeable composite non-woven fabric including thermoplastic synthetic fibers and a plurality of continuous filaments made of thermoplastic synthetic resin, said filaments bonded to an upper surface of said liquidpermeable fibrous nonwoven fabric, wherein: said filaments extend longitudinally along said fibrous nonwoven fabric, said filaments being generally parallel to one another, each of said filaments fixedly attached to the upper surface of said fibrous nonwoven fabric at bonding zones, said bonding zones intermittently arranged along the longitudinally extending filaments so as to form, between each pair of adjacent said bonding zones along each of said filaments, a bulge forming a generally circular arc above the upper surface of said fibrous nonwoven fabric and having a substantially circular shape in its radial cross-section; and said bonding zones being relatively thin and flat, first portions of said nonwoven fabric underlying said bonding zones being thinner than second portions of said nonwoven fabric surrounding said first portions and having a higher density than that of the second portions; b. a liquid impermeable backsheet; and c. a liquid absorbent core disposed between said topsheet and said backsheet; wherein said topsheet and said backsheet are joined together along peripheral portions thereof extending outward beyond a peripheral edge of said core.