Absorbent structure including a thin, calendered airlaid composite and a process for making the composite 机翻标题: 暂无翻译,请尝试点击翻译按钮。

公开号/公开日
US2002068081 A1 2002-06-06 [US20020068081]US6479061 B2 2002-11-12 [US6479061] / 2002-06-062002-11-12
申请号/申请日
2001US-10008860 / 2001-10-26
发明人
FONTENOT MONICA C;FORD TERRY PEARCE;TANNER JAMES JAY;OWEN JONATHAN ROBERT;LASSIG JOHN JOSEPH;BURNS BARBARA JEAN;SHUMAN ALAN GRADY;GENTILE VICTOR MICHAEL;
申请人
KIMBERLY CLARK;
主分类号
IPC分类号
B32B-005/08D04H-001/44
摘要
(US6479061) The present invention pertains to an airlaid composite which is made of pulp fibers, at least about 2% by weight bicomponent fiber, and moisture.  This airlaid composite is unique in that a uniformly even composite is made which upon calendering, becomes a thin structure which maintains significant absorbency when saturated.  The bicomponent fibers of the present invention include a first polymer component and a second polymer component, and the first polymer component melts at a temperature lower than the melting temperature of the second polymer component.  Mixing of the pulp fibers with the bicomponent fibers is done in such a way that the fibers are evenly dispersed in the airlaid composite.  This airlaid composite is then heated such that at least a portion of the first polymer component of the bicomponent fiber is melted, which bond the bicomponent fibers to many of the pulp and bicomponent fibers when cooled.  Moisture is added on to the composite to further facilitate bonding when the composite is subsequently subjected to calendering.  Optionally, a sheet layer may be attached to the airlaid composite to form a multi-layered absorbent structure.  Such composites and absorbent structures are characterized by a drape stiffness of at least about 5 cm, an absorbency of at least about 12 g/g, and a dry tensile strength of at least about 1300.
机翻摘要
暂无翻译结果,您可以尝试点击头部的翻译按钮。
地址
代理人
代理机构
;
优先权号
1998US-60111671 1998-12-10 1999US-09290713 1999-04-12 2001US-10008860 2001-10-26
主权利要求
(US6479061) We claim: 1.  A thin, calendered multi-layered absorbent structure comprising: a) a thin, calendered airlaid composite further comprising: - i) pulp fiber;  and - ii) at least about 2% by weight bicomponent fiber having a first polymer component and a second polymer component, wherein said first polymer component melts at a temperature lower than the melting temperature of said second polymer component, and further wherein said bicomponent fibers are integrally mixed and evenly dispersed with said pulp fibers and said first polymer component is bonded to many of said pulp fibers and bicomponent fibers; wherein percent by weight is based on the total weight of i) and ii);  and at least one sheet layer;  wherein said multi-layered absorbent structure has a drape stiffness of at least about 5 cm, an absorbency of at least about 12 g/g, and a dry tensile strength of at least about 1300 grams, and still further wherein calendering is carried out while the airlaid composite comprises about 5% by weight to about 20% by weight moisture. 2. The thin, calendered multi-layered absorbent structure of claim 1 wherein said sheet layer is a film layer, a tissue layer, a meltsprayed layer or a nonwoven layer. 3. The thin, calendered multi-layered absorbent structure of claim 2 wherein said sheet layer is a fluid impervious film layer. 4. The thin, calendered multi-layered absorbent structure of claim 1 wherein said sheet layer is a fluid previous film layer. 5. The thin, calendered multi-layered absorbent structure of claim 3 wherein said fluid impervious film layer is on one side of said thin, calendered multi-layered absorbent structure and further including a fluid previous film layer on the opposite side of said thin, calendered multi-layered absorbent structure. 6. A process of preparing a thin, calenderend airlaid composite comprising: a) providing pulp fibers; b) integrally mixing and evenly dispersing at least about 2% by weight bicomponent fiber with said pulp fibers, wherein said bicomponent fiber has a first polymer component and a second polymer component and said first polymer component melts at a temperature lower than the melting temperature of said second polymer component, c) forming a airlaid composited with said pulp fibers and said bicomponent fiber without compressing said airlaid composite; d) heating said airlaid composite thereby melting a portion of said first component of said bicomponent fibers; e) cooling said airlaid composite thereby bonding many of said bicomponent fibers to said pulp fibers and bicomponent fibers; f) moisturizing said airlaid composite such that said airlaid composite further comprises sufficient moisture add-on to facllitate further bonding; then calendering said airlaid composite to form a thin, calendered airlaid composite having a drape stiffness of at least about 5 cn, and absorbency of at least about 12 g/g, and a dry tensile strength of at least about 1300 grams, and wherein percent by weight is based on the total weight of said pulp fibers and bicomponent fibers, and further comprising the step of attaching at least one sheet layer to said airlaid composite to form a multi-layered absorbent structure. 7. The process of claim 6 wherein said sheet layer is attached to said airlaid composite by corona treatment combined with said calendering. 8. The process of claim 7 wherein said moisturizing is provided by a spray atomizer. 9. The process of claim 8 wherein said calendering is conducted in the range of 800 to 4000 pli (143-715 kg/linear cm) and at ambient temperatures. 10. An absorbent article made from the thin, calendered multi-layered absorben structure of claim 1. 11. An absorbent pad for use in shipping envelopes or packages for managing fluids, said absorbent pad made from the thin, calendered multi-layered absorbent structure of claim 1. 12. An absorbent pad for use in food packaging mad from the thin, calendered multi-layered absorbent structure of claim 1. 13. A personal care product made from the thin, calendered multi-layered absorbent structure of claim 1.
法律状态
(US6479061) LEGAL DETAILS FOR US2002068081  Actual or expected expiration date=2014-12-08    Legal state=DEAD    Status=LAPSED     Event publication date=2001-10-26  Event code=US/APP  Event indicator=Pos  Event type=Examination events  Application details  Application country=US US10008860  Application date=2001-10-26  Standardized application number=2001US-10008860     Event publication date=2001-10-26  Event code=US/EXMR  Event type=Administrative notifications  USPTO Examiner Name Primary Examiner: GHALI, ISIS A D    Event publication date=2001-10-26  Event code=US/ART  Event type=Administrative notifications  USPTO Art Group  ART=1615     Event publication date=2001-10-26  Event code=US/ENT  Event type=Administrative notifications  Entity Status Set to Undiscounted Business Entity Status: UNDISCOUNTED    Event publication date=2001-10-26  Event code=US/AIA  Event type=Administrative notifications  First Inventor File Indicated:  AIA=No     Event publication date=2001-10-26  Event code=US/DK  Event type=Examination events  Attorney Docket Number Docket Nbr: 14257.1    Event publication date=2001-10-26  Event code=US/CUST  Event type=Examination events  Attorney/Agent Customer Number Customer Nbr: 23556    Event publication date=2002-01-22  Event code=US/DOCK  Event indicator=Pos  Event type=Examination events  Case Docketed to Examiner    Event publication date=2002-02-13  Event code=US/IDS  Event type=Examination events  Event type=OAI  Information Disclosure Statement Filed    Event publication date=2002-03-18  Event code=US/EXIN  Event type=Examination events  Event type=OAO  Event type=INT  Examiner Interview Summary Record (PTOL - 413)    Event publication date=2002-03-19  Event code=US/APE  Event type=Corrections  Preliminary amendments    Event publication date=2002-05-29  Event code=US/NOAM  Event indicator=Pos  Event type=Examination events  Event type=OAO  Mail Notice of Allowance    Event publication date=2002-06-06  Event code=US/A1  Event type=Examination events  Application published  Publication country=US  Publication number=US2002068081  Publication stage Code=A1  Publication date=2002-06-06  Standardized publication number=US20020068081     Event publication date=2002-09-16  Event code=US/APRDY  Event indicator=Pos  Event type=Examination events  Application Is Considered Ready for Issue    Event publication date=2002-10-24  Event code=US/ISSM  Event indicator=Pos  Event type=Examination events  Event type=OAO  Event type=Restitution or restoration  Issue Notification Mailed    Event publication date=2002-11-12  Event code=US/B2  Event indicator=Pos  Event type=Event indicating In Force  Granted patent as second publication  Publication country=US  Publication number=US6479061  Publication stage Code=B2  Publication date=2002-11-12  Standardized publication number=US6479061     Event publication date=2002-11-12  Event code=US/354  Event indicator=Pos  Event type=Extension of term of duration of protection  Patent term extended under  35 U.S.C 154(b) until/for Delays (A,B,C): 0  Overlap Delays: 0  Non Overlap Delays: 0   PTO Office Delays: 0  Applicant Delays: 18  Adjustment total:  Number of days of extension=0    Event publication date=2006-04-26  Event code=US/FPAY  Event indicator=Pos  Event type=Event indicating In Force  Event type=Payment or non-payment notifications  Fee payment recorded   Annual fees payment date=2006-04-26     Year of payment of annual fees=4     Event publication date=2010-05-12  Event code=US/FPAY  Event indicator=Pos  Event type=Event indicating In Force  Event type=Payment or non-payment notifications  Fee payment recorded   Annual fees payment date=2010-05-12     Year of payment of annual fees=8     Event publication date=2014-06-20  Event code=US/REMI  Event type=Administrative notifications  Maintenance fee reminder mailed    Event publication date=2014-11-12  Event code=US/LAPS  Event indicator=Neg  Event type=Event indicating Not In Force  Event type=Payment or non-payment notifications  Lapse for failure to pay maintenance fees    Event publication date=2014-11-12  Event code=US/FP  Event indicator=Neg  Event type=Event indicating Not In Force  Event type=Payment or non-payment notifications  Expired due to failure to pay maintenance fee  Effective date of the event=2014-11-12     Event publication date=2014-12-05  Event code=US/EXP  Event indicator=Neg  Event type=Event indicating Not In Force  Patent expired    Event publication date=2014-12-08  Event code=US/FP  Event indicator=Neg  Event type=Event indicating Not In Force  Event type=Payment or non-payment notifications  Expired due to failure to pay maintenance fee
专利类型码
A1B2
国别省市代码
若您需要申请原文,请登录。

最新评论

暂无评论。

登录后可以发表评论

意见反馈
返回顶部