WO2005118933A2 - Couverture en fibres - Google Patents
Couverture en fibres Download PDFInfo
- Publication number
- WO2005118933A2 WO2005118933A2 PCT/US2005/018293 US2005018293W WO2005118933A2 WO 2005118933 A2 WO2005118933 A2 WO 2005118933A2 US 2005018293 W US2005018293 W US 2005018293W WO 2005118933 A2 WO2005118933 A2 WO 2005118933A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- blankets
- blanket
- continuous filament
- filaments
- present
- Prior art date
Links
Classifications
-
- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H3/00—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length
- D04H3/08—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating
- D04H3/16—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating with bonds between thermoplastic filaments produced in association with filament formation, e.g. immediately following extrusion
-
- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H3/00—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length
- D04H3/08—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating
- D04H3/10—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating with bonds between yarns or filaments made mechanically
- D04H3/11—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating with bonds between yarns or filaments made mechanically by fluid jet
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
- Y10T442/60—Nonwoven fabric [i.e., nonwoven strand or fiber material]
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
- Y10T442/60—Nonwoven fabric [i.e., nonwoven strand or fiber material]
- Y10T442/69—Autogenously bonded nonwoven fabric
Definitions
- the present invention is generally related to continuous filament nonwoven fabrics, and more specifically related to continuous filament nonwoven fabrics for use as low-cost disposable airline and rescue operation blankets.
- Nonwoven fabrics are used in a wide variety of applications where the engineered qualities of the fabrics can be advantageously employed.
- the use of selected thermoplastic polymers in the construction of the filamentary components, selected treatment of the components (either while in molten form or in an integrated structure), and selected use of various mechanisms by which the filamentary components are integrated into a useful fabric, are typical variables by which to adjust and alter the performance of the resultant nonwoven fabric.
- Nonwoven blankets are known in the art. Typically, the nonwoven blankets comprise one or more lofty fibrous batts of carded and cross-lapped staple length fiber that is subsequently bonded by needle-felting or entangling.
- one or more post treatments are performed on the consolidated batt, such as jet dyeing and napping in order to lend to the aesthetic appeal of the blanket or enhance the hand of the blanket.
- Such a multi-step fabrication process for blankets can be rather costly, and it is therefore an objective of the present invention to manufacture an inexpensive nonwoven blanket for airlines and rescue operations by utilizing the spunbond process.
- spunbonding refers to a process in which a thermoplastic polymer is provided in a raw or pellet form and is melted and extruded or "spun” through a large number of small orifices to produce a bundle of continuous or essentially endless filaments. These filaments are cooled and drawn or attenuated and are deposited as a loose web onto a moving conveyor.
- the filaments are then partially bonded , typically by passing the web between a pair of heated rolls, with at least one of the rolls having a raised pattern to provide a bonding pattern in the fabric.
- spunbonding is the most efficient, since the final fabric is made directly from the raw material on a single production line.
- the present invention is directed to continuous filament nonwoven fabrics, and more specifically directed to continuous filament nonwoven fabrics for use as low-cost disposable airline and rescue operation blankets.
- Continuous filament fabrics are formed utilizing the spunbond process.
- the spunbond process and the manner of preparing a spunbond web is set forth in U.S. Patent No. 3,341 ,394 to Kinney and U.S. Patent No. 4,043,201 to Brock, et al., both of which are herein incorporated by reference.
- Nonwoven blankets made in accordance with the present invention comprise one or more continuous filament webs of thermoplastic polymers that may be chosen from the group consisting of polyolefins, polyamides, and polyesters, wherein the polyolefins are chosen from the group consisting of polypropylene, polyethylene, and combinations thereof. It is within the purview of the present invention that the continuous filament web or webs may comprise either the same or different thermoplastic polymers. Further, the continuous filaments may comprise homogeneous, bi-component, and/or multi-component profiles, as well as, performance modifying additives, and the blends thereof.
- the filamentary blankets of the present invention may be disposed after a single use or semi-reusable, wherein the blanket has a limited number of uses before needing to be replaced.
- Such blankets are suitable for a variety of applications, such as insulative blankets, emergency rescue blankets, institutional blankets, airline blankets, and other applications where blankets are used only a limited number of times or in some cases only once before being discarded.
- a spunbond process involves supplying a molten polymer, which is then extruded under pressure through a large number of orifices in a plate known as a spinneret or die.
- the resulting continuous filaments are quenched and drawn by any of a number of methods, such as slot draw systems, attenuator guns, or Godet rolls.
- the continuous filaments are collected as a loose web upon a moving foraminous surface, such as a wire mesh conveyor belt.
- the subsequent web is collected upon the uppermost surface of the previously formed web.
- the web is then at least temporarily consolidated, usually by means involving heat and pressure, such as by thermal point bonding.
- the web or layers of webs are passed between two hot metal rolls, one of which has an embossed pattern to impart and achieve the desired degree of point bonding, usually on the order of 10 to 40 percent of the overall surface area being so bonded.
- thermoplastic polymers of the continuous filament spunbond layer or layers are chosen from the group consisting of polyolefins, polyesters, polyamides, and halopolymers, with ethylene-fluorocarbon copolymers, particularly ethylene-chlorotrifluoroethylene (ECTFE), wherein the polyolefins are chosen from the group consisting of polypropylene, polyethylene, and combinations thereof.
- ECTFE ethylene-chlorotrifluoroethylene
- the continuous filament web or webs may comprise either the same or different thermoplastic polymers.
- the continuous filaments may comprise homogeneous, bi-component, and/or multi-component profiles, as well as, performance modifying additives, and the blends thereof.
- the continuous filamentary web may comprise one or more discontinuous filament webs through application of the meltblown process.
- the melt-blown process is a related means to the spunbond process for forming a layer of a nonwoven fabric, wherein, a molten polymer is extruded under pressure through orifices in a spinneret or die. High velocity air impinges upon and entrains the filaments as they exit the die. The energy of this step is such that the formed filaments are greatly reduced in diameter and are fractured so that microfibers of finite length are produced. This differs from the spunbond process whereby the continuity of the filaments is preserved.
- the process to form either a single layer or a multiple-layer fabric is continuous, that is, the process steps are uninterrupted from extrusion of the filaments to form the first and subsequent layers through consolidation of the layers to form a composite fabric.
- Nano-denier filaments may be incorporated as well. Suitable nano- denier continuous filament layers can be formed by either direct spinning of nano-denier filaments or by formation of a multi-component filament that is divided into nano-denier filaments prior to deposition on a substrate layer.
- the molten polymer Prior to extrusion, the molten polymer can be compounded with various performance enhancing melt-additives, such as thermal stabilizers, softening agents, antimicrobial agents, fire-retarding agents, cross-linking agents, slip additives, and wetting agents, UV, anti-stats, colorants, and nucleating agents.
- a nucleating agent may be specifically compounded to produce a more stable spinning process, and, at equal process conditions, can produce a further increase in strength.
- the fabric may be exposed to further performance enhancing additives after fabric formation.
- a blanket that exhibits a high degree of strength. It has been contemplated that utilizing polymeric resins with low melt indexes, such as between about 5-20 Ml, may enhance the strength of the blanket; however, it is also suitable to utilize polymeric resins with higher melt indexes, about 20-35 Ml, depending on the application.
- filaments with varying geometric cross-sections may be utilized, as disclosed in U.S. Patent No. 5,057,368 to Largman, et al. ; U.S. Patent No. 5,322,736 Boyle, et al.; and U.S. Patent No. 5,834,119 to Roop.
- Multi-component filaments may also be utilized as well, such as side-by-side filaments, sheath-core filaments, and islands in the sea filaments.
- Splittable fibers are also suitable for use in the present invention, wherein upon impact the components of such fibers separate.
- the aforementioned filaments may be used in whole or in part within one or more layers of the continuous filament blanket.
- the nonwoven blanket of the present invention is comprised of extruded and thermally bonded continuous polyethylene filaments.
- the resultant blanket has excellent drapeability and hand with a preferred basis weight of about 50-200 grams per square meter and a most preferred basis weight of about 85-130 grams per square meter.
- the continuous filament blanket Prior to extrusion of the filaments, a pigment was added to the polymeric melt to impart a color into the blanket. Further, subsequent to thermal bonding, the blanket fabric was subjected to a napping post treatment so as to produce a low cost blanket that has the desired insulative, tactile, and visual properties often sought in a blanket.
- the continuous filament blanket may be hydroentangled on an imaged forming surface, wherein such surfaces include three-dimensionally surfaced belt, metal drums, wire screens, and three-dimensional image transfer devices. Such surface treatments enhance the aesthetic appearance of the blanket, as well as improve the overall bulk and hand of the blanket.
- Additional surface treatments include mechanical compaction as practiced in micrexing or sanforizing ("Sanforized” is a registered trademark of Cluett, Peabody & Co., Inc).
- the filamentary blankets of the present invention are low-cost and suitable for disposed after a single use. Alternately, the blankets may be considered semi-reusable, wherein the blanket may be used a limited number of times before needing to be replaced. Such blankets may be used as insulative blankets, emergency rescue blankets, institutional blankets, airline blankets, as well as in other applications where blankets of limited use are required or in cases where blankets are used once before being discarded.
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Mechanical Engineering (AREA)
- Nonwoven Fabrics (AREA)
Abstract
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
BRPI0511602-3A BRPI0511602A (pt) | 2005-05-25 | 2005-05-25 | cobertor filamentar |
EP05756027A EP1751337A4 (fr) | 2004-05-26 | 2005-05-25 | Couverture en fibres |
MXPA06013641A MXPA06013641A (es) | 2004-05-26 | 2005-05-25 | Manta filamentaria. |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US57466804P | 2004-05-26 | 2004-05-26 | |
US60/574,668 | 2004-05-26 |
Publications (2)
Publication Number | Publication Date |
---|---|
WO2005118933A2 true WO2005118933A2 (fr) | 2005-12-15 |
WO2005118933A3 WO2005118933A3 (fr) | 2006-10-12 |
Family
ID=35463489
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US2005/018293 WO2005118933A2 (fr) | 2004-05-26 | 2005-05-25 | Couverture en fibres |
Country Status (4)
Country | Link |
---|---|
US (1) | US20050272340A1 (fr) |
EP (1) | EP1751337A4 (fr) |
MX (1) | MXPA06013641A (fr) |
WO (1) | WO2005118933A2 (fr) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20100062671A1 (en) * | 2008-09-05 | 2010-03-11 | Nutek Disposables, Inc. | Composite wipe |
Family Cites Families (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3341394A (en) * | 1966-12-21 | 1967-09-12 | Du Pont | Sheets of randomly distributed continuous filaments |
US4043201A (en) * | 1976-05-03 | 1977-08-23 | Lucas Electrical Limited | Fluid pressure transducer |
US4374888A (en) * | 1981-09-25 | 1983-02-22 | Kimberly-Clark Corporation | Nonwoven laminate for recreation fabric |
GB2237194A (en) * | 1989-10-11 | 1991-05-01 | Fellwrap Ltd | Blankets |
US5057368A (en) * | 1989-12-21 | 1991-10-15 | Allied-Signal | Filaments having trilobal or quadrilobal cross-sections |
CA2105026C (fr) * | 1993-04-29 | 2003-12-16 | Henry Louis Griesbach Iii | Non-tisse forme et sa methode de fabrication |
US5322736A (en) * | 1993-06-24 | 1994-06-21 | Alliedsignal Inc. | Hollow-trilobal cross-section filaments |
US5679379A (en) * | 1995-01-09 | 1997-10-21 | Fabbricante; Anthony S. | Disposable extrusion apparatus with pressure balancing modular die units for the production of nonwoven webs |
US5834119A (en) * | 1997-01-03 | 1998-11-10 | E. I. Du Pont De Nemours And Company | Filament cross-sections |
US6114017A (en) * | 1997-07-23 | 2000-09-05 | Fabbricante; Anthony S. | Micro-denier nonwoven materials made using modular die units |
EP1128956A4 (fr) * | 1998-10-05 | 2003-01-22 | Bba Nonwovens Simpsonville Inc | Non tisse stable aux uv a dechirement trapezoidal accru |
US20030162459A1 (en) * | 2002-02-27 | 2003-08-28 | Osbon Robert Lindsay | Method for producing a nonwoven fabric with enhanced characteristics |
WO2004048657A2 (fr) * | 2002-11-22 | 2004-06-10 | Polymer Group, Inc. | Tissu non tisse marque par des regions |
-
2005
- 2005-05-25 WO PCT/US2005/018293 patent/WO2005118933A2/fr active Application Filing
- 2005-05-25 US US11/137,118 patent/US20050272340A1/en not_active Abandoned
- 2005-05-25 EP EP05756027A patent/EP1751337A4/fr not_active Withdrawn
- 2005-05-25 MX MXPA06013641A patent/MXPA06013641A/es unknown
Non-Patent Citations (1)
Title |
---|
See references of EP1751337A4 * |
Also Published As
Publication number | Publication date |
---|---|
WO2005118933A3 (fr) | 2006-10-12 |
EP1751337A2 (fr) | 2007-02-14 |
MXPA06013641A (es) | 2007-03-23 |
US20050272340A1 (en) | 2005-12-08 |
EP1751337A4 (fr) | 2008-04-30 |
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