# US 2021/0275364 A1 · Elastomeric laminate with control layer and methods thereof > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2021/0275364 A1 - Document ID: US20210275364A1 - Status: Published application - Kind: A1 - Application number: 17/191,749 - Filed: 2021-03-04 - Published: 2021-09-09 - Earliest claimed: 2020-03-09 - Assignees: The Procter & Gamble Company - Applicants: The Procter & Gamble Company - Inventors: Todd L. MANSFIELD; Robert H. TURNER - Web page: https://patentgrep.com/patent/US20210275364A1 ## CPC - A61F 13/49009: {with elastic means} - A61F 13/4902: {characterised by the elastic material} - A61F 13/15211: {soluble or disintegratable in liquid} - A61F 13/15699: {Forming webs by bringing together several webs, e.g. by laminating or folding several webs, with or without additional treatment of the webs} - A61F 13/15764: {Transferring, feeding or handling devices; Drives} - B29C 65/48: using adhesives {, i.e. using supplementary joining material; solvent bonding} - B29C 66/7294: {Non woven mats, e.g. felt} - C08L 91/00: Compositions of oils, fats or waxes; Compositions of derivatives thereof - A61F 13/49011: {the elastic means is located at the waist region} - A61F 13/49014: {the elastic means is located at the side panels} - A61F 2013/15235: {by its solubility in water} - A61F 2013/15292: {Resistance, i.e. modulus or strength} - A61F 2013/1591: {via adhesive} - A61F 2013/49025: {having multiple elastic strands} - B29L 2031/4878: {Diapers, napkins} - 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) - B29C: SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING (making preforms B29B11/00; making laminated products by combining previously unconnected layers which become one product whose layers will remain together B32B37/00 - B32B41/00) - C08L: COMPOSITIONS OF MACROMOLECULAR COMPOUNDS (compositions based on polymerisable monomers C08F, C08G; artificial filaments or fibres D01F; textile treating compositions D06) - B29L: INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES ## Abstract The present disclosure relates to absorbent article incorporating elastomeric laminates that may be formed by stretching and joining an elastic strand with either or both first and second substrates using an adhesive. The elastic strands may be sourced from a wound supply, such as a beam of beamed elastic strands. The beam may be treated with a control layer to reducing blocking when the plurality of elastic strands are on the beam and to provide for reliable unwinding. The control layer may be absorbed into an adhesive once the elastic strands are joined with the first and second substrates with the adhesive to form the elastomeric laminate. ## Claims ### Claim 1 A disposable absorbent article in the form of a diaper or absorbent pant, comprising a liquid permeable topsheet, a liquid impermeable backsheet, and an absorbent core disposed between the topsheet and the backsheet, and comprising: an elastomeric laminate, the elastomeric laminate comprising a plurality of elastic strands spaced from each other and joined with a nonwoven web material by an adhesive; wherein the elastic strands comprise a strand polymer, wherein the strand polymer has a solubility parameter within the range of about 18 MPa1/2 to about 18.5 MPa1/2; wherein the adhesive comprises an adhesive polymer, wherein the adhesive polymer has a solubility parameter within the range of about 16 MPa1/2 to about 17.5 MPa1/2; and wherein the elastic strands are sourced from a wound supply of elastic strands, the wound supply of elastic strands comprising a control layer having a solubility parameter within the range of about 15.5 MPa1/2 to about 16.5 MPa1/2 and a number average molecular weight within the range of about 0.6 kg/mol to about 1.5 kg/mol. ### Claim 2 (depends on 1) The disposable absorbent article of claim 1, wherein the number average molecular weight of the control layer is lower than the molecular weight of each of the strand polymer and the adhesive polymer. ### Claim 3 (depends on 2) The disposable absorbent article of claim 2, wherein the χN value between the control layer and the strand polymer is greater than 2 and the χN value between the control layer and the adhesive polymer is less than 2, wherein N is a degree of polymerization of the control layer and χ is a Flory-Huggins interaction parameter. ### Claim 4 (depends on 1) The disposable absorbent article of claim 1, wherein the strand polymer has a solubility parameter of about 18.3 MPa1/2. ### Claim 5 (depends on 1) The disposable absorbent article of claim 1, wherein when the elastomeric laminate is subjected to the Laminate Creep Test, the elastomeric laminate has a Laminate Creep of 5 millimeters or less. ### Claim 6 (depends on 5) The disposable absorbent article of claim 5, wherein the elastomeric laminate has a Static Peel Force Time of greater than 700 min/10 mm. ### Claim 7 (depends on 1) The disposable absorbent article of claim 1, wherein the adhesive at 38° C. has a plateau modulus of elasticity of about 0.1 MPa at 38° C. and 1 Hz. ### Claim 8 (depends on 1) The disposable absorbent article of claim 1, the tensile modulus of the elastic strand at room temperature is within the range of about 5 MPa to about 15 MPa and wherein the plateau modulus of the adhesive at 38° C. is 0.1 MPa or less at 38° C. and 1 hz. ### Claim 9 (depends on 8) The disposable absorbent article of claim 8, the tensile modulus of the elastic strand at room temperature is about 10 MPa. ### Claim 10 (depends on 1) The disposable absorbent article of claim 1, wherein the control layer is a mineral oil. ### Claim 11 (depends on 10) The disposable absorbent article of claim 10, wherein the mineral oil is a paraffinic mineral oil. ### Claim 12 (depends on 1) The disposable absorbent article of claim 1, wherein the control layer comprises any of white mineral oil, polyisoprene, and polybutadiene. ### Claim 13 (depends on 1) The disposable absorbent article of claim 1, wherein the control layer is a synthetic oil. ### Claim 14 (depends on 1) The disposable absorbent article of claim 1, wherein the control layer comprises a soap. ### Claim 15 (depends on 14) The disposable absorbent article of claim 14, wherein the soap is magnesium stearate. ### Claim 16 (depends on 14) The disposable absorbent article of claim 14, wherein the control layer comprises about 1% to 5% by weight of the soap. ### Claim 17 (depends on 1) The disposable absorbent article of claim 1, wherein the elastomeric laminate has a Force Relaxation Over Time of from about 5% to about 30%. ### Claim 18 (depends on 1) The disposable absorbent article of claim 1, wherein the wound supply of elastic strands is a beam of beamed elastics. ### Claim 19 (depends on 1) The disposable absorbent article of claim 1, wherein the control layer surrounds an exterior surface of the elastic strands. ### Claim 20 A disposable absorbent article in the form of a diaper or absorbent pant, comprising: an elastomeric laminate, the elastomeric laminate comprising a plurality of laterally-spaced elastic strands joined with at least a first layer of nonwoven web material by an adhesive, wherein the elastic strands comprise a first block copolymer of the spandex-type, wherein the block copolymer comprises a rubber block and a rigid block, wherein the rubber block is selected from a group consisting of polyethers, polyesters, and combinations thereof; wherein the adhesive comprises an adhesive polymer, wherein the adhesive polymer comprises a second block copolymer of the styrenic type, wherein the second block copolymer comprises a rubber block, wherein the rubber block is selected from a group consisting of polyisoprene, polybutadiene, polyisoprene-co-butadiene, and hydrogenated variants thereof; and a control layer at least partially dispersed from the elastic strand to the adhesive. ### Claim 21 (depends on 20) The disposable absorbent article of claim 20, wherein the plurality of laterally-spaced elastic strands are sourced from a beam of elastic strands. ### Claim 22 A disposable absorbent article in the form of a diaper or absorbent pant, comprising: an elastomeric laminate, the elastomeric laminate comprising a plurality of laterally-spaced elastic strands joined with at least a first layer of nonwoven web material by an adhesive, wherein the elastic strands comprise a first block copolymer of the spandex-type, wherein the block copolymer comprises a rubber block and a rigid block, wherein the rubber block is selected from a group consisting of polyethers, polyesters, and combinations thereof; wherein the adhesive comprises an adhesive polymer, wherein the adhesive polymer comprises a second block copolymer of the styrenic type, wherein the second block copolymer comprises a rubber block, wherein the rubber block is selected from a group consisting of polyisoprene, polybutadiene, polyisoprene-co-butadiene, and hydrogenated variants thereof; and wherein the elastomeric laminate comprises a soap. ### Claim 23 (depends on 22) The disposable absorbent article of claim 22, wherein the soap is disposed adjacent to the elastic strands. ### Claim 24 (depends on 22) The disposable absorbent article of claim 22, wherein the soap is disposed adjacent to the adhesive. ### Claim 25 A process for making an elastomeric laminate, comprising: unwinding elastomeric strands coated with a control layer, the control layer comprising a mineral oil; bonding the elastomeric strands between first and second substrate layers to form an elastomeric laminate; wherein the elastomeric strands have an Average Strand Spacing from about 0.25 mm to about 4 mm; and wherein the Average Dtex of the elastomeric strands is from about 10 to about 500. ### Claim 26 (depends on 25) The process of claim 25, wherein unwinding elastomeric strands coated with a control layer comprises unwinding the elastomeric strands from a wound supply of elastomeric strands. ### Claim 27 (depends on 26) The process of claim 26, wherein the wound supply of elastomeric strands is a beam of elastomeric strands. ### Claim 28 (depends on 25) The process of claim 25, wherein the first and second substrate layers are first and second discrete nonwovens. ### Claim 29 (depends on 25) The process of claim 25, wherein the first and second substrate layers are formed from a continuous nonwoven folded over. ### Claim 30 (depends on 25) The process of claim 25, wherein the Average Strand Spacing is from about 0.5 to about 3 mm. ### Claim 31 (depends on 25) The process of claim 25, wherein the control layer comprises a soap. ### Claim 32 (depends on 25) The process of claim 25, wherein the control layer comprises a number average molecular weight within the range of about 0.6 kg/mol to about 1.5 kg/mol. ### Claim 33 (depends on 25) The process of claim 25, further comprising: forming at least a portion of a disposable absorbent article component using the elastomeric laminate. ### Claim 34 (depends on 33) The process of claim 33, wherein the disposable article component is selected from the group consisting of a belt, an ear, a side panel, a cuff, a waistband, a backsheet, and a topsheet. ### Claim 35 A method for assembling an elastomeric laminate, the method comprising: providing a first substrate and a second substrate; advancing elastic strands in a machine direction, wherein the elastic strands are separated from each other in a cross direction; applying adhesive to at least one of the elastic strands, the first substrate, and the second substrate; combining the elastic strands with a first substrate and a second substrate to form an elastomeric laminate; and dispersing a control layer from the elastic strands to the adhesive, wherein the control layer comprises a mineral oil. ### Claim 36 (depends on 35) The method of claim 35, further comprising: unwinding the elastic strands from a beam. ### Claim 37 (depends on 35) The method of claim 35, wherein the elastic strands are separated from each other in the cross direction by an Average Strand Spacing from about 0.25 mm to about 4 mm. ### Claim 38 (depends on 35) The method of claim 35, wherein the Average Strand Spacing is from about 0.5 mm to about 3 mm. ### Claim 39 (depends on 35) The method of claim 35, wherein the Average Dtex of the elastic strands is from about 10 to about 500. ### Claim 40 (depends on 35) The method of claim 35, wherein the first substrate and the second substrate are discrete nonwovens. ### Claim 41 (depends on 35) The method of claim 35, further comprising: folding a continuous nonwoven to define the first substrate and the second substrate. ### Claim 42 (depends on 35) The method of claim 35, wherein the control layer comprises a soap. ### Claim 43 (depends on 35) The method of claim 35, wherein the control layer comprises a number average molecular weight within the range of about 0.6 kg/mol to about 1.5 kg/mol. ### Claim 44 (depends on 35) The method of claim 35, further comprising: forming at least a portion of a disposable absorbent article component using the elastomeric laminate. ### Claim 45 (depends on 44) The method of claim 44, wherein the disposable article component is selected from the group consisting of a belt, an ear, a side panel, a cuff, a waistband, a backsheet, and a topsheet. ### Claim 46 (depends on 35) The method of claim 35, wherein the elastic strands comprise a strand polymer, wherein the strand polymer has a solubility parameter within the range of about 18 MPa1/2 to about 18.5 Mpa1/2. ### Claim 47 (depends on 35) The method of claim 35, the adhesive comprises an adhesive polymer, wherein the adhesive polymer has a solubility parameter within the range of about 16 MPa1/2 to about 17.5 MPa1/2.