EP0319249B1
Expired / Lapsed
EP
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Disposable diaper with improved fastener attachment
Assignee: 3M Co
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Filing: 1988-11-29
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Granted: 1992-02-26
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Expires: 2008-11-29
Abstract
No abstract record available.
Inventors
- 👤 Leigh E. C/O Minnesota Mining And Wood
- 👤 John A. C/O Minnesota Mining And Miller
- 👤 Alan J. C/O Minnesota Mining And Sipinen
- 👤 Susan K. C/O Minnesota Mining And Nestegard
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 14:29
CPC Classifications
A; A61; A61F; A61F13/00; A61F13/15; A61F13/56; A61F13/62; A61F13/622; Y; Y10; Y10T; Y10T24/00; Y10T24/27; Y10T24/2775
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
135 words
A disposable diaper or similar disposable garment comprising a heat and pressure-sensitive polyolefin layer, a fastener including fastener portions having first and second major surfaces and mechanically engageable means along the first surfaces of said fastener portions adapted for releasably mechanically engaging each other; and a bonding layer adhering the second surface of at least one of said fastener portions to said polyolefin layer, wherein said bonding layer (14, 14a, 36) is of room-temperature non-tacky thermoplastic material, bonded to the polyolefin layer (11) under heat and pressure that leaves the polyolefin layer (11) substantially undeformed and holds the fastener portion (12, 12a, 30) to the polyolefin layer (11) with greater force than that which is required to separate the engaged fastener (12, 13) so that the fastener (12, 13) may be repetitively closed and opened.
Claim 2
Dependent Claim
62 words
A diaper or similar disposable garment according to claim 1 wherein the bonding layer (14, 14a, 36) holding the fastener portion (12, 12a, 30) to the polyolefin film with greater force than that which is required to deform the polyolefin layer (11) when a 90 degree peel test is performed between the polyolefin layer (11) and the bonding layer (14, 14a, 36).
Claim 3
Dependent Claim
57 words
A diaper or similar disposable garment according to claim 1 wherein the polyolefin layer (11) is a film less than 0.005 centimeter (0.002 inch) thick, and said bonding layer (12, 12a, 36) bonds said fastener portion to said film to produce a 90 degree peel strength of at least 118 gram per centimeter (300 grams per inch).
Claim 4
Dependent Claim
59 words
A diaper or similar disposable garment according to claim 1 wherein the bonding layer (14, 14a, 36) includes from about 40% to about 100% of a thermoplastic material having a softening point of generally below 120 degrees Centigrade, and from about 60% to about 0% of a tackifying resin that has a softening point below about 105 degrees Centigrade.
Claim 5
Dependent Claim
59 words
A diaper or similar disposable garment according to claim 1 wherein the bonding layer (14, 14a, 36) includes from about 40% to about 90% of a thermoplastic material having an softening point of generally below 100 degrees Centigrade, and from about 60% to about 10% of a tackifying resin that has a softening point below about 95 degrees Centigrade.
Claim 6
Dependent Claim
33 words
A diaper or similar disposable garment according to claim 5 wherein said thermoplastic material is a copolymer of ethylene and vinyl acetate having a melt flow index between about 50 and about 2500.
Claim 7
Dependent Claim
27 words
A diaper or similar disposable garment according to claim 1 wherein the bonding layer (14, 14a, 36) has an activation temperature of below generally 110 degrees Centigrade.
Claim 8
Dependent Claim
60 words
A diaper or similar disposable garment according to claim 1 wherein the bonding layer (14, 14a, 36) has an activation temperature of below generally 100 degrees Centigrade, and said bonding layer (14, 14a, 36) has an open time of over 2 seconds at room temperature after being removed from heat that has heated said bonding layer to said activation temperature.
Claim 9
Independent Claim
215 words
A method for attaching a fastener portion to a heat and pressure-sensitive polyolefin layer of a disposable diaper or similar disposable garment, said method comprising: providing a preformed laminate (40) of a length of fastening material having first and second major surfaces and mechanically engageable means along the first surface (44), and a bonding layer (46) of room-temperature non-tacky thermoplastic material adhered to the second surface of the fastener material, which laminate (40) has no release coating on the first surface (44) and is rolled into a supply roll (48) without a release liner between its wraps; pulling an end portion of the preformed laminate from the supply roll (48); cutting a predetermined length (58) of the preformed laminate (40) from the end portion to form the fastener portion; and heating the bonding layer (46) on the fastener portion to its activation temperature; bonding the bonding layer (46) on the fastener portion to the polyolefin layer (60) under conditions of heat and pressure that leave the polyolefin layer (60) substantially undeformed while the bonding layer (46) holds the fastener portion to the polyolefin layer (60) with greater force than that which is required to separate the fastener portion from a mating second fastener portion so that the fastener portion may be repetitively engaged and disengaged.
Claim 10
Dependent Claim
66 words
A method according to claim 9 for attaching a fastener portion to a heat and pressure-sensitive polyolefin layer of a disposable diaper or similar disposable garment, further including the step of terminating said heating step prior to said bonding step, said bonding step being performed a predetermined time after said heating step and the bonding layer having an open time of greater than said predetermined time.
Claim 11
Dependent Claim
66 words
A method according to claim 9 for attaching a fastener portion to a heat and pressure-sensitive polyolefin layer of a disposable diaper or similar disposable garment, further including the step of terminating said heating step prior to said bonding step, said bonding step being performed less than 9 seconds after said heating step and the bonding layer having an open time of greater than 9 seconds.
References Cited (Backward Citations)
No citation records indexed.
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