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公开(公告)号：AT145681T
公开(公告)日：1996-12-15
申请号：AT93916434
申请日：1993-06-07
Applicant: FIBERWEB NORTH AMERICA INC
Inventor： AUSTIN JARED A , BERMAN MARK H S , DUNLEAVY RAYMOND A
Abstract: The invention is directed to a composite nonwoven fabric comprising a nonwoven web of spunbonded substantially continuous thermoplastic filaments, a nonwoven web of thermoplastic strands, and a nonwoven web of thermoplastic meltblown microfibers sandwiched between the nonwoven web of spunbonded substantially continuous filaments and the nonwoven web of thermoplastic strands. An adhesive agent is disposed between the nonwoven web of spunbonded filaments and the nonwoven web of meltblown microfibers and between the nonwoven web of thermoplastic strands and the nonwoven web of meltblown microfibers, adhering the respective nonwoven webs together to form a unitary composite nonwoven fabric. In a preferred embodiment, the composite nonwoven fabric of the invention comprises a nonwoven web of spunbonded substantially continuous polyamide filaments, a nonwoven web of polyamide strands, and a nonwoven web of polyethylene meltblown microfibers sandwiched between the nonwoven web of spunbonded substantially continuous filaments and the nonwoven web of strands.
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公开(公告)号：ES2092304T3
公开(公告)日：1996-11-16
申请号：ES93911563
申请日：1993-03-29
Applicant: FIBERWEB NORTH AMERICA INC
Inventor： TRIMBLE LLOYD E , ZELDIN LEON M , GRUBBS WILLIAM J , FRANCIS JOHN V
Abstract: A slot draw attenuator apparatus and method are provided for producing webs of spunbonded thermoplastic filaments having improved cover even at low basis weights. The filaments are introduced to a slot draw attenuator having corona electrodes mounted in an elongate insulator bar and staggered and spaced along one wall of the attenuator slot near the exit end thereof. The corona electrodes are electrically connected to a high voltage source. The opposing wall of the slot is grounded. A corona is created in the attenuator slot so that the filaments are charged as they exit the attenuator. The electrostatic charge induces repelling forces in the filaments so that the filaments spread before they are randomly deposited upon a forming belt.
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公开(公告)号：DE69026298T2
公开(公告)日：1996-08-29
申请号：DE69026298
申请日：1990-04-24
Applicant: FIBERWEB NORTH AMERICA INC
Inventor： GESSNER SCOTT L
Abstract: The present invention provides a thermally-bonded nonwoven fabric that is made from a web which comprises from 100 to 5 percent by weight of multiconstituent fibers. Said multiconstituent fibers are composed of highly dispersed blends of at least two different immiscible thermoplastic polymers and have a dominant continuous polymer phase with at least one noncontinuous phase dispersed therein. The noncontinuous phase exists as an elongated fibrillar polymer domain oriented generally in the direction of the fiber axis. No single polymer domain cross-section of said noncontinuous phase or phases is larger than 0.1% of the cross-sectional area of said fiber. The polymer of the noncontinuous phase or phases has a Polymer Melt Temperature (PMT) at least 30 DEG C below the PMT of the continuous phase. The fiber is configured such that said noncontinuous phase or phases occupy a substantial portion of the fiber surface. In addition to such fabrics, laminates --made by combining nonwoven fabrics made from the materials and processes as described herein with films, paper, tissue, woven fabrics, or nonwoven fabrics such as meltblowns-- are also contemplated. The fabric according to the invention readily bonds to other materials of the sorts mentioned, and is therefore suitable for use in filtration media, medical and clean room garments, CSR wrap, absorbent article backsheets, and other barrier structures.
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公开(公告)号：AT140494T
公开(公告)日：1996-08-15
申请号：AT93911563
申请日：1993-03-29
Applicant: FIBERWEB NORTH AMERICA INC
Inventor： TRIMBLE LLOYD E , ZELDIN LEON M , GRUBBS WILLIAM J , FRANCIS JOHN V
Abstract: A slot draw attenuator apparatus and method are provided for producing webs of spunbonded thermoplastic filaments having improved cover even at low basis weights. The filaments are introduced to a slot draw attenuator having corona electrodes mounted in an elongate insulator bar and staggered and spaced along one wall of the attenuator slot near the exit end thereof. The corona electrodes are electrically connected to a high voltage source. The opposing wall of the slot is grounded. A corona is created in the attenuator slot so that the filaments are charged as they exit the attenuator. The electrostatic charge induces repelling forces in the filaments so that the filaments spread before they are randomly deposited upon a forming belt.
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公开(公告)号：AU4244196A
公开(公告)日：1996-06-17
申请号：AU4244196
申请日：1995-11-22
Applicant: FIBERWEB NORTH AMERICA INC
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Patent Agency Ranking
公开(公告)号：DE69021042D1
公开(公告)日：1995-08-24
申请号：DE69021042
申请日：1990-11-01
Applicant: FIBERWEB NORTH AMERICA INC
Inventor： ZELDIN LEON , LAMKIN RONALD , WERNER JOSEPH
Abstract: A method and apparatus for providing uniformly distributed filaments from a spun filament bundle and a process for forming spunbonded fabric having superior uniformity and a favorable ratio between machine and cross direction tensile strengths. The apparatus includes a fiber transfer tube and a pair of adjustable deflector plates. The deflector plates form a channel having a tapering width for transporting the filaments in a stream of high velocity air. The apparatus may also include an electrostatic charging means for applying an electrostatic charge to each individual filament after it exits the channel. The method for providing uniformly distributed filaments includes a first stage of separating the filament bundle by the high velocity stream of air and may also include a second stage of electrostatically charging the filaments to achieve a uniform filament separation. The process for forming spunbonded fabric enables a fabric to be produced having a machine direction to cross direction tensile strength ratio less than about 1.5.
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公开(公告)号：AT125315T
公开(公告)日：1995-08-15
申请号：AT91902564
申请日：1990-11-01
Applicant: FIBERWEB NORTH AMERICA INC
Inventor： ZELDIN LEON M , LAMKIN RONALD E , WERNER JOSEPH E
Abstract: A method and apparatus for providing uniformly distributed filaments from a spun filament bundle and a process for forming spunbonded fabric having superior uniformity and a favorable ratio between machine and cross direction tensile strengths. The apparatus includes a fiber transfer tube and a pair of adjustable deflector plates. The deflector plates form a channel having a tapering width for transporting the filaments in a stream of high velocity air. The apparatus may also include an electrostatic charging means for applying an electrostatic charge to each individual filament after it exits the channel. The method for providing uniformly distributed filaments includes a first stage of separating the filament bundle by the high velocity stream of air and may also include a second stage of electrostatically charging the filaments to achieve a uniform filament separation. The process for forming spunbonded fabric enables a fabric to be produced having a machine direction to cross direction tensile strength ratio less than about 1.5.
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公开(公告)号：AU7214794A
公开(公告)日：1995-01-24
申请号：AU7214794
申请日：1994-06-28
Applicant: FIBERWEB NORTH AMERICA INC
Inventor： GESSNER SCOTT L , MERRIMAN MARCUS C , PARSONS CHARLES H
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公开(公告)号：NO944774A
公开(公告)日：1994-12-09
申请号：NO944774
申请日：1994-12-09
Applicant: FIBERWEB NORTH AMERICA INC
Inventor： AUSTIN JARED A , DUNLEAVY RAYMOND A , BERMAN MARK H S
IPC: D04H20060101 , D04H13/00
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公开(公告)号：NO943813L
公开(公告)日：1994-10-07
申请号：NO943813
申请日：1994-10-07
Applicant: FIBERWEB NORTH AMERICA INC
Inventor： TRIMBLE LLOYD E , GRUBBS WILLIAM J , ZELDIN LEON M , FRANCIS JOHN V
Abstract: A slot draw attenuator apparatus and method are provided for producing webs of spunbonded thermoplastic filaments having improved cover even at low basis weights. The filaments are introduced to a slot draw attenuator having corona electrodes mounted in an elongate insulator bar and staggered and spaced along one wall of the attenuator slot near the exit end thereof. The corona electrodes are electrically connected to a high voltage source. The opposing wall of the slot is grounded. A corona is created in the attenuator slot so that the filaments are charged as they exit the attenuator. The electrostatic charge induces repelling forces in the filaments so that the filaments spread before they are randomly deposited upon a forming belt.
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