Fabric (woven – knitted – or nonwoven textile or cloth – etc.) – Nonwoven fabric – Autogenously bonded nonwoven fabric
Reexamination Certificate
2011-08-09
2011-08-09
Torres-Velazquez, Norca L (Department: 1786)
Fabric (woven, knitted, or nonwoven textile or cloth, etc.)
Nonwoven fabric
Autogenously bonded nonwoven fabric
C442S334000, C442S335000, C442S337000, C442S364000, C442S401000, C442S415000, C428S364000, C428S365000, C428S373000, C428S397000, C156S062400
Reexamination Certificate
active
07994081
ABSTRACT:
A nonwoven fabric is provided having a plurality of semi-crystalline filaments that are thermally bonded to each other and are formed of the same polymer and exhibit substantially the same melting temperature. The fabric is produced by melt spinning an amorphous crystallizable polymer to form two components having different levels of crystallinity. During spinning, a first component of the polymer is exposed to conditions that result in stress-induced crystallization such that the first polymer component is in a semi-crystalline state and serves as the matrix or strength component of the fabric. The second polymer component is not subjected to stress induced crystallization and thus remains in a substantially amorphous state which bonds well at relatively low temperatures. In a bonding step, the fabric is heated to soften and fuse the binder component. Under these conditions, the binder component undergoes thermal crystallization so that in the final product, both polymer components are semi-crystalline.
REFERENCES:
patent: 3304220 (1967-02-01), McIntyre
patent: 3309260 (1967-03-01), Boese
patent: 3384944 (1968-05-01), Medeiros et al.
patent: 3989788 (1976-11-01), Estes, Jr. et al.
patent: 4795668 (1989-01-01), Krueger et al.
patent: 4869958 (1989-09-01), Murase et al.
patent: 5082720 (1992-01-01), Hayes
patent: 5382400 (1995-01-01), Pike et al.
patent: 5387382 (1995-02-01), Fottinger et al.
patent: 5418045 (1995-05-01), Pike et al.
patent: 5562930 (1996-10-01), Hills
patent: 5730821 (1998-03-01), Joest et al.
patent: 6165217 (2000-12-01), Hayes
patent: 6274238 (2001-08-01), DeLucia
patent: 6309423 (2001-10-01), Hayes
patent: 6548431 (2003-04-01), Bansal et al.
patent: 6589892 (2003-07-01), Smith et al.
patent: 6613704 (2003-09-01), Arnold et al.
patent: 6770356 (2004-08-01), O'Donnell et al.
patent: 6811873 (2004-11-01), Nadkarni
patent: 6916752 (2005-07-01), Berrigan et al.
patent: 6964931 (2005-11-01), Carlyle et al.
patent: 2001/0000352 (2001-04-01), Hayes
patent: 2002/0065013 (2002-05-01), Porterfield et al.
patent: 2002/0160682 (2002-10-01), Zeng et al.
patent: 2003/0119403 (2003-06-01), Willis et al.
patent: 2003/0124941 (2003-07-01), Hwo et al.
patent: 2003/0216099 (2003-11-01), Berrigan et al.
patent: 2004/0097158 (2004-05-01), Rudisill et al.
patent: 2005/0182233 (2005-08-01), Weinhold et al.
patent: 0 340 982 (1989-11-01), None
patent: 1 023 093 (2003-11-01), None
patent: 1 016 741 (2005-01-01), None
patent: WO 03/100141 (2003-12-01), None
patent: WO 2008/016770 (2008-02-01), None
Search Report and Written Opinion for PCT/US2008/073136 dated Nov. 19, 2008.
Farell Gregory W.
Willis Edward Keith
Alston & Bird LLP
Fiberweb, Inc.
Torres-Velazquez Norca L
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