Claims
- 1. A method for manufacturing a disposable absorbent article having portions which are elastically extensible in at least a first direction, said method comprising the steps of:
- providing a chassis, said chassis comprising:
- a liquid pervious topsheet, a liquid impervious backsheet joined with said topsheet, and an absorbent core positioned between said topsheet and said backsheet;
- providing a first lamina joined to said chassis, said first lamina having pleats, said pleats being oriented in a second direction;
- providing at least one elastomeric lamina in face to face relation with at least a portion of said pleats of said first lamina;
- providing two circumferentially grooved rolls, a first roll and a second roll, having mutually parallel axes and defining a nip therebetween, at least said first roll having a plurality of circumferential grooves and lands intermediate said grooves, said grooves being oriented in said second direction;
- passing said first lamina and said elastomeric lamina in face to face relation through said nip, such that said pleats of said first lamina face said grooves of said first roll;
- transversely registering the pleats of said first lamina with said grooves of said first roll;
- pressing said rolls together about a the plane generally perpendicular to and connecting the axes of said rolls so that said first lamina contacts said elastomeric lamina at a position corresponding to said lands; and
- bonding said first lamina to said elastomeric lamina at said positions of contact.
- 2. The method of claim 1, wherein at least said first lamina comprises a thermoplastic material, said first roll has at least one generally radially oriented upstanding protrusion, and wherein said first lamina is autogenously bonded to said elastomeric lamina.
- 3. The method of claim 2, wherein said first lamina and said elastomeric lamina pass through said nip at a velocity differential of at least about 2%.
- 4. The method of claim 2, wherein said rolls are pressed about the plane generally perpendicular to and connecting the axes of said rolls so that a pressure of about 42,200,000 kilograms per square meter to about 56,200,000 kilograms per square meter is obtained on at least one roll.
- 5. The method of claim 4, further comprising the step of heating at least one of said rolls to a temperature sufficient to effect joining of said first lamina and said elastomeric lamina.
- 6. The method of claim 1, wherein said grooves of said first roll have a nonuniform pitch.
- 7. The method of claim 1, wherein said first lamina is a separate element affixed to said chassis.
- 8. The method of claim 1, wherein said first lamina is an extension of said topsheet or said backsheet.
- 9. A method for manufacturing a disposable absorbent article having portions which are elastically extensible in at least a first direction, said method comprising the steps of:
- providing a chassis, said chassis comprising:
- a liquid pervious topsheet, a liquid impervious backsheet associated with said topsheet, an absorbent core positioned between said topsheet and said backsheet, and at least two ear flaps joined to said topsheet and/or said backsheet, each of said ear flaps comprising a first lamina and a second lamina, said first lamina and said second lamina having pleats, said pleats of said second lamina being substantially mutually parallel with and outwardly facing from said pleats of said first lamina and said pleats being oriented in a second direction;
- providing at least one elastomeric lamina in face to face relation with at least a portion of said pleats of said first lamina;
- providing two rolls, a first roll and a second roll, having mutually parallel axes and defining a nip therebetween, said first roll and said second roll having a plurality of circumferential grooves and lands intermediate said grooves, said grooves being oriented in said second direction;
- passing said first lamina and said second lamina through said nip with said elastomeric lamina positioned between said first lamina and said second lamina, such that said pleats of said first lamina face said grooves of said first roll and said pleats of said second lamina face said grooves of said second roll;
- transversely registering the pleats of said first lamina with said grooves of said first roll and transversely registering the pleats of said second lamina with said grooves of said second roll;
- pressing said rolls together about a plane generally perpendicular to and connecting the axes of said rolls so that said first lamina and said second lamina contact said
- elastomeric lamina at a position corresponding to said lands; and
- bonding said first lamina and said second lamina to said elastomeric lamina at said positions of contact.
- 10. The method of claim 9, wherein at least one of said first lamina, said second lamina, and said elastomeric lamina comprises a thermoplastic material, at least one of said rolls has at least one generally radially oriented upstanding protrusion, and wherein said first lamina and said second lamina are autogenously bonded to said elastomeric lamina.
- 11. The method of claim 10, wherein said first lamina and said second lamina pass through said nip at a velocity differential of at least about 2%.
- 12. The method of claim 10, wherein said rolls are pressed about the plane generally perpendicular to and connecting the axes of said rolls so that a pressure of about 42,200,000 kilograms per square meter to about 56,200,000 kilograms per square meter is obtained on at least one roll.
- 13. The method of claim 12, further comprising the step of heating at least one of said rolls to a temperature sufficient to effect joining of said laminae.
- 14. The method of claim 9, wherein said ear flap is a separate
- element joined to said chassis.
- 15. The method of claim 9, wherein said first lamina comprises a portion of said topsheet and said second lamina comprises a portion of said backsheet.
Parent Case Info
This is a division of application Ser. No. 07/821,654 filed on Jan. 16, 1992, which is a continuation-in-part of application Ser. No. 07/382,516, filed Jul. 19, 1989, and entitled "Improved Method For Manufacturing A Laminate Having At Least One Pleated Lamina", now abandoned which is a continuation-in-part of application Ser. No. 64,896, filed on Jun. 19, 1987, now U.S. Pat. No. 4,854,984.
US Referenced Citations (22)
Foreign Referenced Citations (2)
Number |
Date |
Country |
0295957 |
Dec 1988 |
EPX |
2088069 |
Jan 1972 |
FRX |
Divisions (1)
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Number |
Date |
Country |
Parent |
821654 |
Jan 1992 |
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Continuation in Parts (2)
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Number |
Date |
Country |
Parent |
382516 |
Jul 1989 |
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Parent |
64896 |
Jun 1987 |
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