US3044250A - Textile product - Google Patents

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Publication number
US3044250A
US3044250A US668718A US66871857A US3044250A US 3044250 A US3044250 A US 3044250A US 668718 A US668718 A US 668718A US 66871857 A US66871857 A US 66871857A US 3044250 A US3044250 A US 3044250A
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Prior art keywords
staple
nylon
yarn
cotton
fibers
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Expired - Lifetime
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US668718A
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English (en)
Inventor
Harold H Hebeler
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EIDP Inc
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EI Du Pont de Nemours and Co
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Application filed by EI Du Pont de Nemours and Co filed Critical EI Du Pont de Nemours and Co
Priority to US668718A priority Critical patent/US3044250A/en
Priority to DE19581410442 priority patent/DE1410442A1/de
Priority to GB20563/58A priority patent/GB899263A/en
Priority to DK237958AA priority patent/DK102979C/da
Priority to CH6113358A priority patent/CH373132A/de
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Publication of US3044250A publication Critical patent/US3044250A/en
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    • D—TEXTILES; PAPER
    • D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
    • D02J—FINISHING OR DRESSING OF FILAMENTS, YARNS, THREADS, CORDS, ROPES OR THE LIKE
    • D02J1/00—Modifying the structure or properties resulting from a particular structure; Modifying, retaining, or restoring the physical form or cross-sectional shape, e.g. by use of dies or squeeze rollers
    • D02J1/22—Stretching or tensioning, shrinking or relaxing, e.g. by use of overfeed and underfeed apparatus, or preventing stretch
    • D02J1/225—Mechanical characteristics of stretching apparatus
    • D—TEXTILES; PAPER
    • D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
    • D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
    • D02G3/00—Yarns or threads, e.g. fancy yarns; Processes or apparatus for the production thereof, not otherwise provided for
    • D02G3/02—Yarns or threads characterised by the material or by the materials from which they are made
    • D02G3/04—Blended or other yarns or threads containing components made from different materials

Definitions

  • This invention relates to a new staple blend, and more particularly to a blend of synthetic and natural fibers having increased strength and abrasion resistance.
  • the synthetic condensation polymer fibers are treated to render them suitable in the present invention by (a) drawing them to the maximum operable draw ratio, and (b) subjecting them to a heat treatment under drawing tension for at least one second at the maximum operable temperature.
  • This maximum temperature is usually about or close to the degradation point of the polymer.
  • the filaments so sreated are characterized by having both a high degree of crystallinity and a high degree of crystalline orientation. This characteristic renders them stable to slack aging so that the load-bearing properties are maintained at least until the fiber is incorporated into the fabric. Yarn spun from these filaments is also free from a high and objectionable boil-ott shrinkage.
  • condensation polymers suitable in the present invention are those which may be highly oriented by a drawing operation, and which then may be crystallized by a sufiiciently severe heat treatment toretain the high orientation.
  • suitable polymers are the linear polyamides, such as polyhexamethylene adipamide (66 nylon) and polycaproamide (6 nylon); crystallizable polyamide copolymers are also suitable when or more 66 nylon or 6 nylon component is present.
  • the high load-bearing synthetic polymer staple of this invention can also be prepared from filaments spun from linear terephthalate polyesters.
  • Such polyesters are those in which the polymer-chain units are at least about 85% repeating units of the formula:
  • the high-modulus natural or naturally-derived staple fibers for which this invention is most useful are the cellulosic-based fibers such as cotton, viscose rayon, acetate rayon and other cellulosic derivatives.
  • fibers of lower modulus such as for example the protein fibers (e.g., Wool), and even for some synthetic fibers, such as fibers from polyacrylonitrile may be advantageously blended with the above specified high tenacity linear condensation polymers.
  • blends of nylon and polyester fibers may be used with any one or blend of the natural fibers.
  • FIGURE 1 shows schematically one form of a tow drawing machine suitable for preparing the high load-bearing fiber of this invention.
  • FIGURE 2 is a self-explanatory graph which shows the improvement in strength when the high load-bearing nylon staple of this invention is added to a combed cotton.
  • FIGURE 3 likewise is a graph which shows a similar relation for g rayon and nylon blends, while FIGURE 4 similarly graphs the strength relation for blends of nylon and wool.
  • the curves for other blends of natural fibers such as wool with nylon and polyethylene terephthalate have the same general configuration.
  • spinning machines from a creel or the like, are combined into a heavy denier tow '(source of supply not shown) and enter the draw machine as a band of filaments at 1.
  • the band of filaments is pressed against the first of a series of feed rolls 3, 3, 3, by means of pinch roll 2, thus preventing the tow from slipping.
  • the feed rolls 3 are all driven at the same constant peripheral speed, and serve to meter the tow to the drawing pins 5.
  • the tow passes in a zig-zag path about the three fixed stainless steel drawing pins 5, thus producing a snubbing effect, which localizes the draw point.
  • the band of filaments then travels in contact with a heated plate 6 (heating means not shown) to the draw rolls, 7, 7, 7.
  • the draw rolls all operating at the same speed, rotate at a higher peripheral velocity then that of the feed rolls 3, 3, so that the yarn is thereby drawn.
  • the relative peripheral speed of the two sets of rolls determines the draw ratio.
  • the drawn .tow leaves the machine at 8, andmay pass thence to a crimping device, a cutting device, to storage or to a tow packaging device.
  • hot plate 6 is relatively long, e.g., 9 feet and may suitably be heated electrically, or by hot oil, high pressure steam, or the like, as is conventional. It is desirable that the tow passing through this machine be spread out into a wide flat band of filaments of uniform but small thickness. When staple finishes are added to the toW prior to drawing, this usually takes place before the filaments reach pinch roll 2.
  • FIGURE 1 is merely illustrative of one suitable embodiment for towing-drawing; other designs may have especial advantages.
  • FIGURE 1 is merely illustrative of one suitable embodiment for towing-drawing; other designs may have especial advantages.
  • FIGURE 1 is merely illustrative of one suitable embodiment for towing-drawing; other designs may have especial advantages.
  • FIGURE 1 is merely illustrative of one suitable embodiment for towing-drawing; other designs may have especial advantages. For example,
  • the properties of the samples obtained under the conditions shown in Table 1 are listed in Table 2.
  • the T for each sample is determined from the stress-strain curve Values are calculated on a gram per denier basis. Boil-oh shrinkage is deter-mined on a skein of the test yarn; the length of the skein is measured before and after the 60 minute boil-oh. treatment and the perecent change (based on length before boil-01f) is calculated.
  • the birefringence of the yarn is determined according to methods of Heyn, Textile Research Journal, 22, 513 (19452) and is a measure of crystalline orientation.
  • the density is measured using density gradient tubes, according to the method of Boyer, Spencer and Wiley, Journal Polymer Science, 1, 249, (1946).
  • the density is proportional to the degree of crystallinity of the fiber.
  • nylon filaments consist The density of the amorphous regions has been estimated to be about 1.069, while that of the crystalline regions has been estimated to be about 1.220 by use of infrared techniques. This is described by Starkweather and Moyuihan in Journal Polymer Science, 22, 363 (1956). From these data, a value can be calculated which is proportional to the fraction of crystalline volume using the formula:
  • Example H The process of Example I is repeated with filaments spun from vacuum-finished, low monomer (3 to 4%) 6-nylon (polymer from caprolactam). The draw ratio in this case is 4.00, and the filaments are held at a temperature of 165 C. for a period of 30 seconds under drawing tension.
  • the yarn sample had a density above 1.139, and a birefringence higher than 0.0590.
  • FIGURE 2 The increased strength of yarns prepared from the high load-bearing nylon staple of this invention in blends with combed cotton are shown in FIGURE 2, in comparison with conventionally prepared nylon staple.
  • the graph shows that 70% or more conventional nylon staple must be added to combed cotton yarns to equal the strength of the original 100% cotton yarn.
  • the blended cotton-nylon yarn of this invention yields increased strengths when even small amounts of nylon are added.
  • the high load-bearing nylon staple of this invention is also advantageously used for blending with rayon staple yarns, as shown in FIGURE 3.
  • the critical parameter is the break elongation of the rayon yarn, which is typically 14%.
  • the nylon'staple should have a high T 4 value.
  • the nylon staple of this inventi-on shows substantial improvement in this respect'ove'r conventional nylon staple; the curve in FIGURE 3, shows that initial additions of conventional nylon, up to about result in a strength decrease, and the original strength of the rayon is only attained when over about .of nylon is added thereto.
  • the nylon staple of this invention shows a strength increase with the initial additions.
  • the high load-bearing nylon staple of this invention may also be advantageously added to low modulus natural fibers such as wool, as shown in FIGURE -4. F01 equivalent compositions, the staple of this invention provides a stronger yarn than that when conventional nylon staple is used for wool-blending purposes.
  • a further measure of the improvement in strength and uniformity of yarns prepared from the blended fiber of this invention is obtained from the lea product (skein samples A, F, and M, for draw ratios of 3.01 to 3.87.
  • the high load-bearing staple of this invention is not merely a product of higher tenacity obtained by routine increase in draw ratio and/ or drawing temperature. This point is illustrated by samples M and N (Tables 1 and 2) which have a higher tenacity (due to higher draw ratio) than samples I break), as shown in Table 3, for blends with cotton, rayon and Wool. Lea products show consistent improvement in strength with increasing additions of the staple of this invention as compared to a decrease in strength or a lesser degree of improvement for conventionally prepared nylon staple.
  • the high load-bearing staple of this invention also has outstanding resistance to pilling, either as a blend in admixture with other staple fiber, or as a' 100% nylon fabric. Filling is a defect commonly observed when woven fabrics from high strength synthetic fibers are sub jected to abrasion. The fibers on the surface become entangled into unsightly fibrous balls described as pills.
  • a sirable to draw the nylon filaments in the absence of p added moisture that is, if antistatic finishes are applied to the yarn prior to drawing, they should befof the nonaqueous variety or, alternatively, the tow may be dried prior to subjecting to the drawing operations. If aque- .ous finishes are required, the heating step must also pro- It is obvions,.that if an antistatic or other type staple 40 finish is tobe added to the tow, prior to heat treating and drawing, that such finish must be stable at the hot plate temperatures which the filaments will encounter.
  • the tow may suitably be heated by contact with a hot plate, wherein the shape is not critical, as long as good contact is obtained. It has been found that the yarn reaches plate temperature in to 1 second; during the balance of the plate contact time, the filaments have been found An alternative heat, or to use an oven supplied with heated air. Com- "binations of these are often useful, since the hot plate heatsthe tow rapidly, while the .oven provides a very I v uniform heat treatment and avoids yarn friction and formation of carbonized deposits of yarnfinish on heated contact surfaces.
  • the 66 nylon tow may be heated to temperatures of 140 to 225 C., and preferably to 165 to 200 C. Thc time at this, temperaturemay vary from 1' second to 40.. seconds, shorter times requiring higher temperature, aS' disclosed hereinbefore. Very satisfactory results are obtained when the yarn is heated by contact with the plate able exposure; a draw ratio of 3.7 may be used for 2.2
  • the heat-treatment ranges apply to a wide range of deniers (leg, from 1.2 to 15 denier and over per filament). It may prove desirable to increase the treating temperatures by about 5 C. for filaments of 10 to 15 denier, but treating times should not be altered. In general, theheat exposure under drawing tension should be about 1000 to 6000 degree-seconds, with 2000.t0 5000 degree-seconds preferred.
  • the filaments cool somewhat before the drawing tension is released.
  • the tow should cool to 90 C. or less.
  • nylon intended for staple use is customarily crimped in some type of stufier crimper (for exam ple, that disclosed by Hitt in U.S. Patent 2,311,174). It has been found that this treatment leads to a certain amount of relaxation of the yarn, especially when done in the presence of moisture. This relaxation results in a significant loss in T7, and hence is undesirable. For example, nylon is readily processed, without crimping to a T of 2.5 g.p.d.
  • the T is only 1.9 g.p.d.; with increased crimping to give a crimp index of 20.5% (normal for 25 standard 3 denier/filament nylon staple), the T falls to 1.5 7 g .p.d.
  • Crimp index is determined on individual filaments by (a) straightening a fiber to remove crimp without substantial elongation of the fiber, (b) measuring the straightened length, (c) allowing the fiber to retract free ly and again measuring; the crimp index is calculated as follows:
  • Length (ed-length (c) Length X100%-crunp index For highest values of T mechanical crimping is to be avoided. More satisfactory results are obtained by passing the tow directly to a suitable staple cutter.
  • a suitable cutter is disclosed by Hull in US. Patent 2,694,447.
  • the staple is thereafter preferably passed through an opener, such as for example the Davis Fur'ber Synthetic Fiber Opener.
  • the opened staple may then be packed into bales under customary baling pressure,
  • the high load-bearing staple of this invention is suitable for'stock blending, sliver blending, or for the preparation of 100% synthetic fiber spun yarns.
  • the high load-bearing staple of this invention can be prepared from polyethylene terephthalate filaments. V The preparation is illustrated by the following example.
  • the tow passes through a heat treating oven, and from thence to a second set of drawing rolls, which maintain the yarn under suitable tension.
  • the tow may be relaxed, held at constant length or stretched While it passes through said oven.
  • the tow passes in an S-shaped path three times through the 8 5 draw foot oven.
  • the tow is exposed for about 20 seconds to 190 C. circulating air in the oven.
  • the yarn is stretched 1% while passing through the oven. This treatment is suflicient to remove most of the water added during drawing, but it is of more significance that it develops a high crystallinity in the yarn. Due to the much lower water sensitivity of polyethylene terephthalate filaments (as compared to nylon), it is unnecessary to maintain the tow in the dry state.
  • the tow is mechanically crimped, and cut to 1 /2 inch staple lengths.
  • the staple is :blended with Egyptian cotton, fi-ber properties and lea products (sample A) are shown in Table 5. Included also in Table are similar results for a conventionally prepared polyethylene terephthalate staple (sample B); the preparation is similar to the high T-, staple of this invention with the exception that tow is heat-treated in the heating oven while free to relax.
  • 1 Dacron is the trademark designation for Du Pont polyester fiber produced from polyethylene terephthalate.
  • Blend consists of 65 parts Dacron, 35 parts cotton.
  • EXAMPLE IV Polyethylene terephthalate filaments are drawn as in Example III; and are then relaxed 3 /2% in the heattreating oven at 130 C., followed by mechanical crimping and cutting to staple. These filaments are coded sample C.
  • a second batch of staple, coded sample D, is prepared under similar conditions, except that the tow is subjected to a 2% stretch in the oven at 140 C., followed by a relaxed heat treatment at 140 C.
  • the properties of the filaments are listed in Table VI.
  • the spun yarn from sample D When blended with cotton in 65 parts to parts (by wt.) cotton, the spun yarn from sample D has a 15% lower lea count product, thus showing that the T value determines the blend strength, rather than the tenacity of the polyethylene terephthalate.
  • the high load-bearing staple of this invention may contain conventional delusterants, dye modifiers, antistatic agents, antioxidants, heat stabilizersand the like.
  • Suitable staple finishes may be added before, during or after the drawing and heat-treating step, subject to the requirements of heat-stability, and, for polyamides, freedom from hydroscopic effects tending to increase the fiber moisture content above the equilibrium value (e.g., about 4.1% at 76% R.H., 74 F.).
  • the present invention offers many advantages over the prior art. It permits the use of relatively cheap natural fibers or those derived from natural cellulosic materials with even small percentages of synthetic fibers to produce a yarn which may be fashioned into wearing apparel having improved wear and abrasion resistance. Another advantage is that apparel made from such blended fibers such as sweaters and socks have improved properties such as less pilling and stretching, softer hand, better shape retention, and greater comfort. It will be apparent, therefore, that the yarns herein disclosed offer a great economic improvement over the prior art.
  • An improved textile yarn consisting of blended staple cotton fibers and staple fibers of a high strength synthetic linear condensation polymer having both a high degree of crystallinity and crystalline orientation selected from the group consisting of polycaprolactam, polyhexamethylene adi-pamide and polyethylene terephthalate, the synthetic staple fibers in the yarn being characterized by being stable against slack-aging and having a load-bearing capacity at least equal to that of the cotton fibers at the break-elongation characteristic of the cotton fibers.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
  • Knitting Of Fabric (AREA)
US668718A 1957-06-28 1957-06-28 Textile product Expired - Lifetime US3044250A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
US668718A US3044250A (en) 1957-06-28 1957-06-28 Textile product
DE19581410442 DE1410442A1 (de) 1957-06-28 1958-06-25 Polyamid-Stapelfasergarn fuer Mischungen mit Naturfasern und Verfahren zu dessen Herstellung
GB20563/58A GB899263A (en) 1957-06-28 1958-06-26 Improvements in or relating to synthetic fibres for blending with natural fibres
DK237958AA DK102979C (da) 1957-06-28 1958-06-27 Fremgangsmåde til fremstilling af stabelfibre af lineære polyamider med høj styrke og brudforlængelse og med en belastningsbæreevne, der er i det mindste den samme som for bomuld.
CH6113358A CH373132A (de) 1957-06-28 1958-06-27 Verfahren zur Herstellung von Stapelfasern

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US668718A US3044250A (en) 1957-06-28 1957-06-28 Textile product

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CH (1) CH373132A (de)
DE (1) DE1410442A1 (de)
DK (1) DK102979C (de)
GB (1) GB899263A (de)

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3251097A (en) * 1963-10-07 1966-05-17 Eastman Kodak Co Methods for producing blended yarn
US3371475A (en) * 1965-09-20 1968-03-05 Du Pont Bulky, high-strength polyethylene terephthalate yarns
US3379001A (en) * 1965-04-09 1968-04-23 Du Pont Blends of cellulosic and polypivalolactone staple fibers
US3664114A (en) * 1969-07-31 1972-05-23 Eastman Kodak Co Spun polyester strands and method for making
US4639347A (en) * 1983-05-04 1987-01-27 E. I. Du Pont De Nemours And Company Process of making crimped, annealed polyester filaments
US4704329A (en) * 1984-03-16 1987-11-03 E. I. Du Pont De Nemours And Company Annealed polyester filaments and a process for making them
US5011645A (en) * 1989-05-04 1991-04-30 E. I. Du Pont De Nemours And Company Process for preparing nylon staple fiber
US5087401A (en) * 1988-11-24 1992-02-11 Toray Industries, Inc. Process for preparing polyester filamentary material
US5093195A (en) * 1989-05-04 1992-03-03 E. I. Du Pont De Nemours And Company Process for preparing nylon staple fiber
US20060128243A1 (en) * 2004-12-15 2006-06-15 Xiangming Kong Stretchable fabrics comprising elastics incorporated into NYCO for use in combat uniforms
US20080286513A1 (en) * 2007-05-15 2008-11-20 Invista North America S A R L Knit fabrics and socks made therefrom incorporating high tensile nylon staple
US20090019624A1 (en) * 2007-07-17 2009-01-22 Invista North America S.A. R.L. Knit fabrics and base layer garments made therefrom with improved thermal protective properties
WO2010042928A2 (en) 2008-10-10 2010-04-15 Invista Technologies S.A.R.L. High load bearing capacity nylon staple fiber and nylon blended yarns and fabrics made therefrom
WO2016061103A1 (en) 2014-10-15 2016-04-21 Invista Technologies S.À R.L. High tenacity or high load bearing nylon fibers and yarns and fabrics thereof
WO2019079584A1 (en) 2017-10-20 2019-04-25 Invista North America S.A.R.L. NYLON DISCONTINUOUS FIBERS WITH HIGH LOAD CAPABILITY COMPRISING AN ADDITIVE, AND MIXED YARNS AND ASSOCIATED TISSUES

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3303169A (en) * 1962-01-18 1967-02-07 Du Pont High-modulus, high-tenacity, lowshrinkage polyamide yarn
US3494819A (en) * 1968-12-11 1970-02-10 Celanese Corp Pill resistant polyester fabrics

Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE535971A (de) *
US2172439A (en) * 1936-12-11 1939-09-12 Celanese Corp Yarn and fabric of mixed fibers
US2252055A (en) * 1938-07-16 1941-08-12 Celanese Corp Staple fiber yarn
US2323383A (en) * 1940-01-06 1943-07-06 Celanese Corp Production of artificial materials
US2477652A (en) * 1946-03-01 1949-08-02 Robbins Chandler Mixed yarn and fabric
US2541181A (en) * 1942-08-15 1951-02-13 American Viscose Corp Staple fiber
US2577915A (en) * 1948-09-21 1951-12-11 Zd Y Pre Chemicku Vyrobu Narod Method for producing artificial fibers from high molecular linear polymers or polycondensates respectively
US2591628A (en) * 1950-07-06 1952-04-01 New Bedford Cordage Company Rope composed of natural and synthetic fibers
US2715763A (en) * 1950-06-27 1955-08-23 American Viscose Corp Synthetic textile fiber
US2745240A (en) * 1950-05-18 1956-05-15 Bates Mfg Co Composite filament and staple yarn
US2769300A (en) * 1953-04-03 1956-11-06 Chemstrand Corp Composite textile yarn
GB767889A (en) * 1954-03-05 1957-02-06 Bemberg Ag A method for the production of yarn or thread

Patent Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE535971A (de) *
US2172439A (en) * 1936-12-11 1939-09-12 Celanese Corp Yarn and fabric of mixed fibers
US2252055A (en) * 1938-07-16 1941-08-12 Celanese Corp Staple fiber yarn
US2323383A (en) * 1940-01-06 1943-07-06 Celanese Corp Production of artificial materials
US2541181A (en) * 1942-08-15 1951-02-13 American Viscose Corp Staple fiber
US2477652A (en) * 1946-03-01 1949-08-02 Robbins Chandler Mixed yarn and fabric
US2577915A (en) * 1948-09-21 1951-12-11 Zd Y Pre Chemicku Vyrobu Narod Method for producing artificial fibers from high molecular linear polymers or polycondensates respectively
US2745240A (en) * 1950-05-18 1956-05-15 Bates Mfg Co Composite filament and staple yarn
US2715763A (en) * 1950-06-27 1955-08-23 American Viscose Corp Synthetic textile fiber
US2591628A (en) * 1950-07-06 1952-04-01 New Bedford Cordage Company Rope composed of natural and synthetic fibers
US2769300A (en) * 1953-04-03 1956-11-06 Chemstrand Corp Composite textile yarn
GB767889A (en) * 1954-03-05 1957-02-06 Bemberg Ag A method for the production of yarn or thread

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3251097A (en) * 1963-10-07 1966-05-17 Eastman Kodak Co Methods for producing blended yarn
US3379001A (en) * 1965-04-09 1968-04-23 Du Pont Blends of cellulosic and polypivalolactone staple fibers
US3371475A (en) * 1965-09-20 1968-03-05 Du Pont Bulky, high-strength polyethylene terephthalate yarns
US3664114A (en) * 1969-07-31 1972-05-23 Eastman Kodak Co Spun polyester strands and method for making
US4639347A (en) * 1983-05-04 1987-01-27 E. I. Du Pont De Nemours And Company Process of making crimped, annealed polyester filaments
US4704329A (en) * 1984-03-16 1987-11-03 E. I. Du Pont De Nemours And Company Annealed polyester filaments and a process for making them
US5087401A (en) * 1988-11-24 1992-02-11 Toray Industries, Inc. Process for preparing polyester filamentary material
US5093195A (en) * 1989-05-04 1992-03-03 E. I. Du Pont De Nemours And Company Process for preparing nylon staple fiber
US5011645A (en) * 1989-05-04 1991-04-30 E. I. Du Pont De Nemours And Company Process for preparing nylon staple fiber
US20060128243A1 (en) * 2004-12-15 2006-06-15 Xiangming Kong Stretchable fabrics comprising elastics incorporated into NYCO for use in combat uniforms
US7405170B2 (en) 2004-12-15 2008-07-29 Invista North America S.A R.L. Stretchable fabrics comprising elastics incorporated into NYCO for use in combat uniforms
US20080286513A1 (en) * 2007-05-15 2008-11-20 Invista North America S A R L Knit fabrics and socks made therefrom incorporating high tensile nylon staple
US20090019624A1 (en) * 2007-07-17 2009-01-22 Invista North America S.A. R.L. Knit fabrics and base layer garments made therefrom with improved thermal protective properties
US10072365B2 (en) 2007-07-17 2018-09-11 Invista North America S.A.R.L. Knit fabrics and base layer garments made therefrom with improved thermal protective properties
WO2010042928A2 (en) 2008-10-10 2010-04-15 Invista Technologies S.A.R.L. High load bearing capacity nylon staple fiber and nylon blended yarns and fabrics made therefrom
US20110177737A1 (en) * 2008-10-10 2011-07-21 INVISTA North America S.arJ. Nylon staple fiber suitable for use in abrasion resistant, high strength nylon blended yarns and fabrics
US10619272B2 (en) 2008-10-10 2020-04-14 Invista North America S.A.R.L. High load bearing capacity nylon staple fiber and nylon blended yarns and fabrics made therefrom
WO2016061103A1 (en) 2014-10-15 2016-04-21 Invista Technologies S.À R.L. High tenacity or high load bearing nylon fibers and yarns and fabrics thereof
WO2019079584A1 (en) 2017-10-20 2019-04-25 Invista North America S.A.R.L. NYLON DISCONTINUOUS FIBERS WITH HIGH LOAD CAPABILITY COMPRISING AN ADDITIVE, AND MIXED YARNS AND ASSOCIATED TISSUES

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Publication number Publication date
CH373132A (de) 1963-11-15
GB899263A (en) 1962-06-20
DE1410442A1 (de) 1968-10-10
DK102979C (da) 1965-11-01

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