WO2003072866A1 - Procede de production d'une etoffe non tissee dotee de caracteristiques ameliorees - Google Patents

Procede de production d'une etoffe non tissee dotee de caracteristiques ameliorees Download PDF

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Publication number
WO2003072866A1
WO2003072866A1 PCT/US2003/005512 US0305512W WO03072866A1 WO 2003072866 A1 WO2003072866 A1 WO 2003072866A1 US 0305512 W US0305512 W US 0305512W WO 03072866 A1 WO03072866 A1 WO 03072866A1
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WO
WIPO (PCT)
Prior art keywords
spun
nonwoven fabric
bonded nonwoven
fabric
continuous multi
Prior art date
Application number
PCT/US2003/005512
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English (en)
Inventor
Robert L. Osbon
John S. Mcdaniel
Original Assignee
Milliken & Company
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from US10/083,922 external-priority patent/US6715189B2/en
Priority claimed from US10/083,940 external-priority patent/US20030162459A1/en
Application filed by Milliken & Company filed Critical Milliken & Company
Priority to AU2003213254A priority Critical patent/AU2003213254A1/en
Publication of WO2003072866A1 publication Critical patent/WO2003072866A1/fr

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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

Definitions

  • This invention relates to specific, improved spun-bonded nonwoven fabrics comprised of continuous multi-component longitudinally splittable fibers.
  • the resulting nonwoven fabrics exhibit enhanced flexibility, drape, softness, thickness, moisture absorption capacity, moisture vapor transmission rate, and cleanliness in comparison with other nonwovens of the same fiber construction.
  • These improved aesthetic and performance characteristics permit expansion of high-strength nonwoven fabric materials into other markets and industries currently dominated by woven and knit fabrics that exhibit such properties themselves, but at high cost and requiring greater manufacturing complexity.
  • Such enhanced fabrics are subjected to certain air impingement procedures, for instance through directing low-pressure gaseous fluids at high velocity to the surface of the targeted nonwoven fabric. Also encompassed within this invention is the method of treating such a specific nonwoven fabric with this air impingement procedure.
  • Nonwoven textile articles have historically possessed many desirable attributes that led to their use for many items of commerce, such as within air filters, furniture linings, and automotive parts, such as vehicle floorcoverings, side panels, and molded trunk linings. Such nonwovens have proven to be lightweight, inexpensive, and uncomplicated to manufacture, among various other advantages.
  • these patents disclose methods and equipment for projecting low pressure, high velocity streams of gaseous fluid against a fabric web in either the opposite or same direction substantially tangential to the web of fabric, thereby creating saw-tooth waves having small bending radii which travel down the fabric thereby breaking up, or weakening, some fiber-to-fiber bonds in the web so as to increase flexibility, drape, and softness of the fabric.
  • An additional attribute imparted to the fabric treated by these processes of air impingement includes increased cleanliness of the fabric due to the removal of undesired fiber fly and other loose materials entrapped in the pile.
  • nonwoven manufacturing technology which has allowed for the introduction of nonwoven textile fabrics into new market areas such as apparel, cleaning cloths, and artificial leather
  • consumer interest has spurred the need for further advances in the finishing of these fabrics in order to improve the look and feel of the fabric for emergence into additional markets and end-use products for apparel, napery, drapery, upholstery, cleaning cloths, and cleanrooms.
  • a further object of the current invention is to achieve a spun-bonded nonwoven fabric comprised of continuous multi-component splittable fibers, which has been mechanically modified to possess increased softness and thickness.
  • It is also an object of the current invention is to achieve a spun-bonded nonwoven fabric comprised of continuous multi-component splittable fibers, which has been mechanically modified to possess increased moisture absorption capacity and moisture vapor transmission rate.
  • Another object of the current invention is to achieve a spun-bonded nonwoven fabric comprised of continuous multi-component splittable fibers, which has been mechanically modified to possess increased cleanliness due to the removal of loose materials trapped in the fabric.
  • a further object of the current invention is to achieve a spun-bonded nonwoven fabric comprised of continuous multi-component splittable fibers, which has been mechanically modified and that maintains its aesthetic appearance due to the finishing process having no physical contact with the surface of the fabric.
  • a spun-bonded nonwoven fabric comprised of continuous multi-component splittable fibers is provided that has been mechanically modified to achieve useful improvements in certain desired properties.
  • the nonwoven fabric is comprised of spun-bonded continuous multi-component filament fiber that has been, either partially or wholly, longitudinally split into its individual component fibers by exposure to mechanical or chemical means, such as high- pressure fluid jets.
  • One potentially preferred non-limiting fabric composition generally comprises 65% polyester fiber and 35% nylon 6 or nylon 6,6 fiber, although other fabric compositions with varying percentages of different fiber types are within the scope of this invention.
  • Acceptable fabrics comprise a majority of synthetic fiber, preferable all synthetic fiber, wherein the term "synthetic" is intended to include any type of fiber not available as a naturally base product.
  • acceptable fibers include polyester, such as, for example, polyethylene terephthalate, polytriphenylene terephthalate, and polybutylene terephthalate; polyamide, such as nylon 6 and nylon 6,6, again, as merely examples; polyolefins, such as polypropylene, polyethylene, and the like; polyaramides, such as Kevlar®, polyurethanes; polylactic acid; and any combinations thereof.
  • polyester such as, for example, polyethylene terephthalate, polytriphenylene terephthalate, and polybutylene terephthalate
  • polyamide such as nylon 6 and nylon 6,6, again, as merely examples
  • polyolefins such as polypropylene, polyethylene, and the like
  • polyaramides such as Kevlar®, polyurethanes
  • polylactic acid and any combinations thereof.
  • the general process for manufacturing this nonwoven lap, or fabric includes the steps of extrusion and spinning; drawing, cooling, and napping; and simultaneously or successively, bonding and consolidation.
  • the bonding and consolidation step several actions occur: (i) the composite filaments are at least partially separated into their individual filaments by, for example, hydroentanglement with high-pressure water jets, (ii) the cohesion and mechanical resistance of the nonwoven lap, or fabric, may be increased, for example, by thermobonding the individual filament with the lower melting point by calendering with a smooth or engraved hot roller, and (iii) ultimately, the nonwoven fabric is dried by methods such as the above-mentioned calendering step, or alternatively, merely as an example, by passage through a hot-air tunnel.
  • the streams of gaseous fluid may be directed against the fabric in the same direction as fabric web flow, opposite the direction of fabric web flow, simultaneously in both directions, or successively in both directions of fabric web flow.
  • One opening, or a plurality of openings may deliver the streams of gaseous fluid.
  • the fabric is exposed to a high velocity vibration technique.
  • such a treatment procedure imparts additional attributes to the target nonwoven fabric including increased fabric thickness, moisture absorption capacity, and moisture vapor transmission rate all for the benefit of allowing the expanding uses of such nonwoven materials.
  • the air impingement treatment equipment is installed in-line with the nonwoven manufacturing process such that the nonwoven fabric is exposed to air impingement treatment following the hydroentanglement step of the nonwoven production process while the fabric is still wet.
  • the nonwoven fabric is typically treated by air impingement on one side of the fabric, although it is contemplated to be within the scope of this invention that the fabric may be treated by air impingement on both sides of the fabric.
  • the wet fabric is then bonded and dried by processes described above, such as thermobonding the lower melting point filament.
  • the fabric may then be dyed or printed and exposed to further finishing processes according to techniques known to those skilled in the art.
  • Another potentially preferred embodiment of the current invention involves exposing the nonwoven fabric to the air impingement process after the bonding and consolidation step of the production process.
  • the air impingement process may be installed in-line with the nonwoven production process such that the fabric is treated immediately as it exits the production line, or it may be treated separately from the production line.
  • the dyed fabric tends to exhibit a slightly lighter shade of color than a dyed nonwoven control fabric that is not treated by the air impingement process.
  • the air impingement process opens up the dense fiber-to-fiber construction of the fabric and creates available space, which allows dyes to further penetrate to fibers deep within the treated dyed fabric.
  • the untreated dyed fabric likely has less available open space and less penetration of dye into the interior of the fabric leaving a higher concentration of dye on the surface of the fabric, thereby creating a fabric that is slightly darker in color.
  • a further potentially preferred embodiment of the current invention involves exposing the nonwoven fabric to the air impingement process after the fabric has been dyed, printed, sanforized, or further modified by finishing processes known to those skilled in the art.
  • An advantage of producing a nonwoven fabric according to the method described herein includes the consolidation of process steps by incorporating the air impingement process in-line with the nonwoven production process.
  • manufacturers would likely incur cost savings by such consolidation of process steps, as well as through complexity reduction via simplified production layouts and organizations, as well as through reductions in required time allocation (e.g., by eliminating the need to take the fabric off the original production line, move it, and tie it into a separate line for air impingement treatment).
  • a further advantage of the current invention is the flexibility of process step sequences and/or arrangements.
  • the fabric may be treated by air impingement: (i) during the nonwoven production process via an in-line arrangement; (ii) after the nonwoven production process either in-line or separate from the production process; (iii) before the fabric has been dyed, printed, or further modified by chemical or mechanical finishing processes; or (iv) after the fabric has been dyed, printed, or further modified by chemical or mechanical finishing processes.
  • This advantageous flexibility permits a manufacturer to choose the process which best optimizes one of the many enhancements imparted to the nonwoven fabric for a particular end use, as well as to possibly determine the best configuration, from an efficiency perspective, for his own manufacturing operations and retain the ability to produce such beneficial inventive nonwoven fabrics.
  • a further advantage of the nonwoven fabric produced according to the present invention is that is has application for use as an allergy barrier.
  • This fabric is characterized by a highly dense construction due to the microdenier size of the individual fibers that have been split during the production process. The dense nature of this fabric allows it to act as a filter to small allergy causing materials.
  • Other nonwoven fabrics used as allergy barriers are typically comprised of multiple layers of fabric and film laminated together for that purpose (e.g., as taught within U.S. Patent No. 6,017,601) such that one layer provides a film barrier, while another layer provides textile-like properties.
  • These laminated nonwoven allergy barriers generally exhibit short useful lives because they often delaminate after repeated use or wash cycles.
  • the fabric of the current invention may be ideal for use as an allergy barrier without requiring lamination to additional layers of fabric or film, thereby avoiding the aforementioned potentially deleterious delamination problem.
  • a single layer of this fabric may be exposed to the air impingement treatment process described herein to achieve a fabric having improved softness, drape, flexibility, etc.
  • the resulting fabric may be ideal for use as an allergy barrier in bedding applications or any other applications where such allergy barriers are useful.
  • nonwoven fabric produced according to the present invention possess enhanced characteristics such as increased flexibility, drape, softness, thickness, moisture absorption capacity, moisture vapor transmission rate, and cleanliness, which are imparted to the fabric without the use of chemicals which may be expensive, irritating to the skin, and detrimental to the environment.
  • spun-bonded nonwoven fabric comprised of continuous multi- component splittable fibers which have been exposed to the process of hydroentanglement with high-pressure water to cause the multi-component fibers to split, at least partially, along their length into individual polyester and nylon 6,6 fibers, according to processes described in the two Freudenberg patents earlier incorporated by reference.
  • the fabric known by its product name as Evolon®, was obtained from Firma Carl Freudenberg of Weinheim, Germany.
  • the Kawabata System was developed by Dr. Sueo Kawabata, Professor of Polymer Chemistry at Kyoto University in Japan, as a scientific means to measure, in an objective and reproducible way, the "hand" of textile fabrics. This is achieved by measuring basic mechanical properties that have been correlated with aesthetic properties relating to hand (e.g. smoothness, fullness, stiffness, softness, flexibility, and crispness), using a set of four highly specialized measuring devices that were developed specifically for use with the Kawabata System. These devices are as follows:
  • Kawabata Pure Bending Tester (KES FB2) Kawabata Compression Tester (KES FB3) Kawabata Surface Tester (KES FB4)
  • KES FB1 through 3 are manufactured by the Kato Iron Works Col, Ltd., Div. of
  • KES FB4 Korean Bassham Company LLC (Kawabata Surface Tester) is manufactured by the Kato Tekko Co., Ltd., Div. of Instrumentation, Kyoto, Japan. Care was taken to avoid folding, wrinkling, stressing, or otherwise handling the samples in a way that would deform the sample. The fabrics were tested in their as-manufactured form (i.e. they had not undergone subsequent launderings.)
  • the Kawabata Pure Bending Tester (KES FB2) was the selected test performed on some of the fabric samples described in the examples below.
  • the testing equipment was set up according to the instructions in the Kawabata Manual.
  • the Kawabata Bending Tester was allowed to warm up for at least 15 minutes before being calibrated.
  • the tester was set up as follows:
  • the bending test measures the resistive force encountered when a piece of fabric that is held or anchored in a line parallel to the warp or filling is bent in an arc.
  • the warp direction was determined to be the machine direction of the fabric
  • the final hysteresis at a given K is the average of the corresponding hysteresis values for the forward and backward parts of the graph, i.e., at + K.
  • Bending Stiffness (B)- Mean bending stiffness per unit width [gf-cm 2 /cm]. Lower value means a more supple hand.
  • Bending hvsteresis (2 ⁇ B05)- Mean width of bending hysteresis per unit width at K 0.5 cm "1 [gf-cm/cm]. Lower value means the fabric recovers more completely from bending.
  • Bending hysteresis (2HB10)- Mean width of bending hysteresis per unit width at K 1.0 cm "1 [gf-cm/cm]. Lower value means the fabric recovers more completely from bending.
  • Bending hysteresis (2HB15)- Mean width of bending hysteresis per unit width at K 1.5 cm “1 [gf-cm/cm]. Lower value means the fabric recovers more completely from bending.
  • the following example shows treatment of the Evolon® fabric with the air impingement process in a laboratory setting.
  • Standard (rather than point-bonded) Evolon® fabric at160 g/m 2 was subjected to a laboratory simulation of the air impingement process as described in the commonly assigned U.S. patents earlier incorporated by reference.
  • Air pressure at 80 psi was delivered by one opening, or slot, to both sides of a piece of fabric, approximately 65 inches by 15 inches, for about 60 seconds.
  • Four 8 inch by 8 inch samples (Samples A-D) were then cut from the treated fabric and tested using the Kawabata Pure Bending Tester.
  • the warp direction was determined to be the machine direction of the fabric when it was manufactured, and the filling direction was estimated to be perpendicular to the warp, or machine direction.
  • a ratio of fabric weight-to-Bending Stiffness (B) was also calculated, i.e. Ratio: Wt/(B). The results are shown in Tables 1A and 1B below.
  • Example 1 was repeated, and the fabric was tested for thickness.
  • the thickness of the fabric was determined using a Thwing-Albert VIR Electronic Thickness Tester (Model No. 89-ll-S) according to ASTM D 1777-96.
  • the untreated greige fabric measured 23.63 mils in thickness, while the treated greige fabric measured 28.98 mils in thickness.
  • the increase may result, at least partially, from further splitting of the composite fibers into their individual fibers. Both of these actions result in the opening up of the fabric by creating free space between fiber bundles and between individual fibers.
  • This increased thickness of the treated fabric has resulted in a fabric with microfiber-like softness, which is desirable in end-use products such as apparel, napery, drapery, and upholstery.
  • the increase in fabric thickness may vary slightly. For example, treating both sides of a lightweight fabric (i.e., a fabric having a fabric weight of less than about 160 g/m 2 ) with the air impingement process may result in about a 15 percent thickness increase that is beneficial for imparting improved softness, or hand, to the fabric. Furthermore, treating the same lightweight fabric with the air impingement process on only one side of the fabric may result in about a 10 percent increase in fabric thickness, which still provides beneficial aesthetic and performance characteristics to the fabric.
  • Example 1 was repeated, and the fabric was tested for absorption capacity.
  • absorption capacity is intended to describe the capacity of the fabric to absorb water. The capacity is measured as milliliters of water per gram of fabric.
  • Four 7 inch by 7 inch fabric samples were created whereby two of the samples were untreated (Samples A and B) and two of the samples were treated by air impingement (Samples C and D). The samples were weighed in their dry state and then placed in a beaker of water and permitted to absorb as much water as possible. The samples were then removed from the water and allowed to drip at an angle for 30 seconds. The samples were then re-weighed. The results are shown in Table 2 below. Table 2
  • Table 2 shows that treating the nonwoven fabric with the air impingement process results in a 30 percent increase in absorption capacity of the fabric. It is contemplated that an absorption capacity of about 3.75 ml/g or greater (an increase of approximately 10 percent or more) may result in some benefit for enhancing the fabric's absorption properties. This enhancement of the fabric is useful in end-use products such as sports apparel, cleaning cloths, napery, and any other applications where moisture transmission is an important feature.
  • Example 1 was repeated, except that the fabric was jet-dyed after the air impingement treatment.
  • the fabric was dyed using disperse dyes for 30 minutes at 130 degrees C.
  • the jet-dye was cooled to 50 degrees C and then the fabric was rinsed twice with water.
  • the fabric was hung to dry in an oven for 5 minutes at 350 degrees F.
  • One 8 inch by 8 inch sample of treated and untreated fabric was then tested using the Kawabata Pure Bending Tester (indicated as "A").
  • the fabric was also tested for shade, or color, variation using a Lab Scan XE manufactured by Hunter Labs., such that "L” indicates the whiteness of the fabric, "A” indicates the tan to green color of the fabric, and "B” indicates the yellowness of the fabric.
  • Table 3A, 3B, and 3C Table 3A
  • the air impingement process opens up the dense fiber-to-fiber construction of the fabric and creates available space, which allows the dye to further penetrate to fibers deep within the treated dyed fabric.
  • the fabric is more uniformly dyed.
  • the untreated dyed fabric likely has less available open space and therefore less penetration of dye into the interior of the fabric leaving a higher concentration of dye on the surface of the fabric, thereby creating a fabric that is slightly darker in color as noted by its exterior appearance.
  • Point-bonded Evolon® at 100g/m 2 was tested for Bending Stiffness (B) using the Kawabata Pure Bending Tester.
  • Two untreated samples (Sample A and B) and four samples treated with the air impingement process as described in Example 1 (Sample C, D, E, and F) were tested in both the warp and filling direction. Again, the warp direction is determined to be the machine direction, while the filling direction is estimated to be perpendicular to the warp, or machine direction.
  • a ratio of fabric weight-to-Bending Stiffness (B) was also calculated, i.e. Ratio: Wt/(B). The results are shown in Table 4 below.
  • Sample C 0.147 0.103 680.3 970.9 Sample D 0.142 0.091 704.2 1098.9 Sample E 0.099 0.082 1010.1 1219.5 Sample F 0.110 0.098 909.1 1020.4 Average 0.125 0.094 800.0 1063.8
  • the treated samples shown in Table 4 above exhibit lower Bending Stiffness (B) than the untreated samples for both the warp and fill estimated directions which indicates that the treated fabric is, overall, more supple and than the untreated samples. Additionally, the fabric weight-to-Bending Stiffness ratio of all of the treated samples is greater than the ratio for the untreated samples.
  • the data shows that the fabric weight-to-Bending Stiffness ratio for the treated samples is about 187 or greater, as shown in Example 1 , but, furthermore, the ratio shown herein for this example is about 680 or greater.
  • Point-bonded Evolon® at 100g/m 2 was tested for Moisture Vapor Transmission Rate according to ASTM E96.
  • Two untreated samples (Sample A and B) and two samples treated with the air impingement process as described in Example 1 (Sample C and D) were placed over a mason jar and secured with the ring portion of the mason jar lid.
  • the mason jar containing 330 ml of water, was weighed prior to a 24-hour test period and was then re- weighed after the 24-hour test period.
  • the difference in weight of the jar, in combination with the size of fabric that covered the opening of the jar determined how much water was transmitted through the fabric over the 24-hour test period. The results are shown in Table 5 below.
  • Table 5 shows that treating the nonwoven fabric with the air impingement process results in a 19 percent increase in moisture vapor transmission rate of the fabric. It is contemplated that a moisture vapor transmission rate of about 675 g/m 2 or greater (an increase of approximately 8 percent or more) may result in some benefit for enhancing the fabric's moisture transmission properties. This enhancement of the fabric is useful in end- use products such as sports apparel, cleaning cloths, napery, and any other applications where moisture transmission is an important feature.
  • inventive spun-bonded nonwoven fabrics comprised of continuous multi-component splittable fibers. These benefits are achieved via a chemical-free process that mechanically modifies the surface of the fabric without actually contacting the surface of the fabric, in order to reduce or eliminate skin irritation and minimize damage to the surface of the fabric.
  • this invention provides expanded utility within previously unavailable markets such that the fabric of the invention may be incorporated into articles of apparel, bedding, residential upholstery, commercial upholstery, automotive upholstery, napery, drapery, residential and commercial cleaning cloths, cleanroom items, allergy barriers, and any other article wherein it is desirable to manufacture an end-use product with these heretofore unavailable beneficial aesthetic and performance characteristics.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Nonwoven Fabrics (AREA)

Abstract

L'invention se rapporte à des non-tissés filés-liés améliorés, spécifiques, composés de fibres continues, multicomposantes, susceptibles d'être divisées longitudinalement. Les non-tissés résultant présentent des caractéristiques améliorées de souplesse, tombant, douceur, épaisseur, capacité d'absorption de l'humidité, taux de transmission de la vapeur d'eau et propreté en comparaison d'autres non-tissés ayant la même structure de fibres. Ces caractéristiques améliorées d'esthétique et de performance permettent le développement de matières non tissées à haute résistance dans d'autres marchés et dans des industries actuellement dominées par les étoffes tissées et les tricots qui présentent des caractéristiques identiques mais sont associés à un coût élevé et à une complexité de fabrication plus importante. Ces étoffes améliorées sont soumises à certaines procédures d'épuration par l'air qui consistent par exemple à diriger des fluides gazeux basse pression à grande vitesse vers la surface du non-tissé cible. Cette invention se rapporte également au procédé de traitement d'un non-tissé spécifique au moyen de cette procédure d'épuration par l'air.
PCT/US2003/005512 2002-02-27 2003-02-21 Procede de production d'une etoffe non tissee dotee de caracteristiques ameliorees WO2003072866A1 (fr)

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Application Number Priority Date Filing Date Title
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US10/083,922 2002-02-27
US10/083,940 2002-02-27
US10/083,922 US6715189B2 (en) 2002-02-27 2002-02-27 Method for producing a nonwoven fabric with enhanced characteristics
US10/083,940 US20030162459A1 (en) 2002-02-27 2002-02-27 Method for producing a nonwoven fabric with enhanced characteristics

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1932955A1 (fr) * 2006-12-15 2008-06-18 FARE' S.p.A. Procédé et appareil pour la production d'un tissu de type spunbond
WO2008072278A3 (fr) * 2006-12-15 2008-11-27 Fare Spa Processus et appareil destiné à produire des tissus non tissés à partir de filaments extrudés

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5990377A (en) * 1997-03-21 1999-11-23 Kimberly-Clark Worldwide, Inc. Dual-zoned absorbent webs
US6395957B1 (en) * 1997-03-21 2002-05-28 Kimberly-Clark Worldwide, Inc. Dual-zoned absorbent webs
US6444312B1 (en) * 1999-12-08 2002-09-03 Fiber Innovation Technology, Inc. Splittable multicomponent fibers containing a polyacrylonitrile polymer component

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5990377A (en) * 1997-03-21 1999-11-23 Kimberly-Clark Worldwide, Inc. Dual-zoned absorbent webs
US6395957B1 (en) * 1997-03-21 2002-05-28 Kimberly-Clark Worldwide, Inc. Dual-zoned absorbent webs
US6444312B1 (en) * 1999-12-08 2002-09-03 Fiber Innovation Technology, Inc. Splittable multicomponent fibers containing a polyacrylonitrile polymer component

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1932955A1 (fr) * 2006-12-15 2008-06-18 FARE' S.p.A. Procédé et appareil pour la production d'un tissu de type spunbond
WO2008072278A3 (fr) * 2006-12-15 2008-11-27 Fare Spa Processus et appareil destiné à produire des tissus non tissés à partir de filaments extrudés
US8585388B2 (en) 2006-12-15 2013-11-19 Fare' S.P.A. Process and apparatus for the production of nonwoven fabrics from extruded filaments

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