US 2018/0214323 A1Published application

Methods of making disposable absorbent undergarments

AssigneeAdvanced Absorbent Technologies, LLC

InventorsDonald A. Sheldon, Joseph Howard, William Terenzoni

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Abstract

A disposable undergarment including an absorbent core assembly and methods of making the same is disclosed. The undergarment includes a chassis holding the core assembly. The chassis includes a front section, a crotch section and a rear section. The core assembly is located in the crotch section, with portions of it extending into the front and rear sections. A large plurality of closely spaced elastic threads extends across the full width of the undergarment in the front and rear sections. The elastic threads are broken in the areas of the core assembly. The core assembly includes a first section of a slow acting but high absorbency SAP in pockets thereof and an underlying second section of a fast acting but lower absorbency SAP in pockets thereof.

Claims32

Dependent claims

A method for making a disposable absorbent undergarment configured to be worn by a person, said method comprising:

providing a chassis comprising:
a first sheet of a cloth-like, non-woven, breathable material, said first sheet having an inner surface, a front section, a back section, a crotch section located between said front section and said back section, and an absorbent core receiving region including portions of said front, back and crotch sections, said front section including a top front edge and a pair of front side edges, said back section including a top back edge and a pair of back side edges, said crotch section comprising a pair of central side edges, each of said pair of central side sections comprising an ergonomically shaped recess configured for forming a respective leg opening for the person, said recesses being spaced apart from each other by a first distance;
and
a plurality of pre-stretched elastic threads secured to said first sheet, said plurality of pre-stretched elastic threads including a first plurality of pre-stretched elastic threads extending parallel to said top front edge and to each other from one of said pair of front side edges to the other of said pair of front side edges, a second plurality of pre-stretched elastic threads extending parallel to said top back edge and to each other from one of said pair of back side edges to the other of said pair of back side edges, and a third plurality of pre-stretched elastic threads extending parallel to said front top edge, to said back top edge, and to each other from one of said pair of central side edges to the other of said pair of central side edges;
cutting plural ones of said plurality of pre-stretched elastic threads into separated segments at the location of said absorbent core receiving region;
providing an absorbent core assembly configured for absorbing fluid from the person, said absorbent core assembly having a width which is less than said first distance;
securing said absorbent core assembly on said inner surface of said chassis at said absorbent core receiving section and between said respective leg openings;
and
securing respective ones of said front side edges to respective ones of said back side edges.

6 more elements

A method of making an absorbent core assembly comprising:

providing a first continuous web of a porous material configured to permit the migration of a liquid therethrough;
providing a second continuous web of a porous material configured to permit the migration of a liquid therethrough;
applying a slow acting, high absorption capacity SAP on a surface of said first continuous web;
fixedly bonding said first and second webs together to form a first quilted web, said first quilted web comprising plural pockets each partially filled with a free volume of said slow acting, high absorption capacity SAP therein;
providing a third continuous web of a porous material configured to permit the migration of a liquid therethrough;
providing a fourth continuous web of a porous material configured to permit the migration of a liquid therethrough;
applying a slow acting, high absorption capacity SAP on a surface of said third continuous web;
fixedly bonding said third and fourth webs together to form a second quilted web, said second quilted web comprising plural pockets each partially filled with a free volume of said slow acting, high absorption capacity SAP therein;
disposing said first quilted web over said second quilted web to form a first section of said absorbent core assembly, said first section having marginal edges;
providing a fifth continuous web of a porous material configured to permit the migration of a liquid therethrough;
providing a sixth continuous web of a porous material configured to permit the migration of a liquid therethrough;
applying a fast acting, low absorption capacity SAP on a surface of said fifth continuous web;
fixedly bonding said fifth and sixth webs together to form a third quilted web, said third quilted web comprising plural pockets each partially filled with a free volume of said fast acting, low absorption capacity SAP therein, said third quilted layer forming a second section of said absorbent core assembly, said second section having marginal edges;
providing a web of a wicking layer under said first section and over said second section, whereupon said web of wicking material is sandwiched between said first and second sections;
and
sealing said marginal edges of said first section to said marginal edges of said second section to form a composite web, said composite web being a precursor for making a plurality of absorbent core assemblies.

13 more elements

Dependencies are inferred from the claim text.

Facts

Application: 15/935,596Filed 26 Mar 2018
Priority: 15 Mar 2013
Published: 2 Aug 2018
Term ends: Not estimatedThe source records don’t support an estimate.

Classification14 codes

A61F 13/5376
Characterised by a layer facilitating or inhibiting flow in one direction or plane, e.g. a wicking layer: characterised by the performance of the…
A61F 13/15585
Apparatus or processes for manufacturing: of babies' napkins, e.g. diapers
A61F 13/15593
Of babies' napkins, e.g. diapers: having elastic ribbons fixed thereto; Devices for applying the ribbons
A61F 13/5323
Inhomogeneous in the plane of the pad: having absorbent material located in discrete regions, e.g. pockets

Family

Application61/792,004Us provisional application · filed 15 Mar 2013
Application14/204,616Continuation in part · filed 11 Mar 2014
Application15/042,859Continuation · filed 12 Feb 2016
Application15/625,132Continuation in part · filed 16 Jun 2017
Application15/709,946Continuation in part · filed 20 Sep 2017
Application15/935,596Continuation
Application15/625,132Continuation
Application15/042,859Continuation in part
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From the US filing history. Foreign family members aren’t listed.