US2895288A - Production of bulky colorspun rayon yarn - Google Patents
Production of bulky colorspun rayon yarn Download PDFInfo
- Publication number
- US2895288A US2895288A US611217A US61121756A US2895288A US 2895288 A US2895288 A US 2895288A US 611217 A US611217 A US 611217A US 61121756 A US61121756 A US 61121756A US 2895288 A US2895288 A US 2895288A
- Authority
- US
- United States
- Prior art keywords
- yarn
- formaldehyde
- bulky
- colorspun
- viscose
- Prior art date
- Legal status (The legal status 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 status listed.)
- Expired - Lifetime
Links
- 229920000297 Rayon Polymers 0.000 title description 28
- 239000002964 rayon Substances 0.000 title description 11
- 238000004519 manufacturing process Methods 0.000 title description 4
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 claims description 52
- 238000000034 method Methods 0.000 claims description 19
- 239000003054 catalyst Substances 0.000 claims description 15
- 230000002378 acidificating effect Effects 0.000 claims description 9
- 230000000694 effects Effects 0.000 claims description 3
- 239000000835 fiber Substances 0.000 description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 16
- 239000000049 pigment Substances 0.000 description 15
- 238000001723 curing Methods 0.000 description 11
- 239000006185 dispersion Substances 0.000 description 11
- 238000009987 spinning Methods 0.000 description 11
- 238000001035 drying Methods 0.000 description 10
- 229920002678 cellulose Polymers 0.000 description 9
- 239000001913 cellulose Substances 0.000 description 9
- 239000000243 solution Substances 0.000 description 9
- 238000004132 cross linking Methods 0.000 description 8
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 6
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 6
- 239000002253 acid Substances 0.000 description 6
- HZAXFHJVJLSVMW-UHFFFAOYSA-N 2-Aminoethan-1-ol Chemical compound NCCO HZAXFHJVJLSVMW-UHFFFAOYSA-N 0.000 description 5
- 239000007795 chemical reaction product Substances 0.000 description 4
- 206010016807 Fluid retention Diseases 0.000 description 3
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 239000004744 fabric Substances 0.000 description 3
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- WSFSSNUMVMOOMR-NJFSPNSNSA-N methanone Chemical compound O=[14CH2] WSFSSNUMVMOOMR-NJFSPNSNSA-N 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 229920005989 resin Polymers 0.000 description 3
- 239000011347 resin Substances 0.000 description 3
- 229910052938 sodium sulfate Inorganic materials 0.000 description 3
- 235000011152 sodium sulphate Nutrition 0.000 description 3
- 230000008961 swelling Effects 0.000 description 3
- NWONKYPBYAMBJT-UHFFFAOYSA-L zinc sulfate Chemical compound [Zn+2].[O-]S([O-])(=O)=O NWONKYPBYAMBJT-UHFFFAOYSA-L 0.000 description 3
- 229960001763 zinc sulfate Drugs 0.000 description 3
- 229910000368 zinc sulfate Inorganic materials 0.000 description 3
- KLBVIRPOVIVOLL-UHFFFAOYSA-N 3-hydroxy-4-[[4-[4-[[2-hydroxy-3-[(2-methoxyphenyl)carbamoyl]naphthalen-1-yl]diazenyl]-3-methoxyphenyl]-2-methoxyphenyl]diazenyl]-N-(2-methoxyphenyl)naphthalene-2-carboxamide Chemical compound COc1ccccc1NC(=O)c1cc2ccccc2c(N=Nc2ccc(cc2OC)-c2ccc(N=Nc3c(O)c(cc4ccccc34)C(=O)Nc3ccccc3OC)c(OC)c2)c1O KLBVIRPOVIVOLL-UHFFFAOYSA-N 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 239000007864 aqueous solution Substances 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 2
- 230000001112 coagulating effect Effects 0.000 description 2
- 239000003086 colorant Substances 0.000 description 2
- 238000006731 degradation reaction Methods 0.000 description 2
- QDOXWKRWXJOMAK-UHFFFAOYSA-N dichromium trioxide Chemical compound O=[Cr]O[Cr]=O QDOXWKRWXJOMAK-UHFFFAOYSA-N 0.000 description 2
- 238000004043 dyeing Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000005470 impregnation Methods 0.000 description 2
- 238000010348 incorporation Methods 0.000 description 2
- VRWKTAYJTKRVCU-UHFFFAOYSA-N iron(6+);hexacyanide Chemical compound [Fe+6].N#[C-].N#[C-].N#[C-].N#[C-].N#[C-].N#[C-] VRWKTAYJTKRVCU-UHFFFAOYSA-N 0.000 description 2
- YOBAEOGBNPPUQV-UHFFFAOYSA-N iron;trihydrate Chemical compound O.O.O.[Fe].[Fe] YOBAEOGBNPPUQV-UHFFFAOYSA-N 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 239000004627 regenerated cellulose Substances 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 238000002791 soaking Methods 0.000 description 2
- CDBYLPFSWZWCQE-UHFFFAOYSA-L sodium carbonate Substances [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- 239000004254 Ammonium phosphate Substances 0.000 description 1
- 229910000906 Bronze Inorganic materials 0.000 description 1
- 239000005696 Diammonium phosphate Substances 0.000 description 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 1
- 241000699696 Meriones Species 0.000 description 1
- 239000004677 Nylon Substances 0.000 description 1
- 229910019142 PO4 Inorganic materials 0.000 description 1
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- 229920001807 Urea-formaldehyde Polymers 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 239000002671 adjuvant Substances 0.000 description 1
- GZCGUPFRVQAUEE-SLPGGIOYSA-N aldehydo-D-glucose Chemical compound OC[C@@H](O)[C@@H](O)[C@H](O)[C@@H](O)C=O GZCGUPFRVQAUEE-SLPGGIOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- ZRIUUUJAJJNDSS-UHFFFAOYSA-N ammonium phosphates Chemical class [NH4+].[NH4+].[NH4+].[O-]P([O-])([O-])=O ZRIUUUJAJJNDSS-UHFFFAOYSA-N 0.000 description 1
- 235000019289 ammonium phosphates Nutrition 0.000 description 1
- -1 antichlor Substances 0.000 description 1
- IRERQBUNZFJFGC-UHFFFAOYSA-L azure blue Chemical compound [Na+].[Na+].[Na+].[Na+].[Na+].[Na+].[Na+].[Na+].[Al+3].[Al+3].[Al+3].[Al+3].[Al+3].[Al+3].[S-]S[S-].[O-][Si]([O-])([O-])[O-].[O-][Si]([O-])([O-])[O-].[O-][Si]([O-])([O-])[O-].[O-][Si]([O-])([O-])[O-].[O-][Si]([O-])([O-])[O-].[O-][Si]([O-])([O-])[O-] IRERQBUNZFJFGC-UHFFFAOYSA-L 0.000 description 1
- 239000007844 bleaching agent Substances 0.000 description 1
- 235000010338 boric acid Nutrition 0.000 description 1
- 125000005619 boric acid group Chemical group 0.000 description 1
- 239000010974 bronze Substances 0.000 description 1
- 239000006229 carbon black Substances 0.000 description 1
- 235000015165 citric acid Nutrition 0.000 description 1
- 239000000084 colloidal system Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000006482 condensation reaction Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- KUNSUQLRTQLHQQ-UHFFFAOYSA-N copper tin Chemical compound [Cu].[Sn] KUNSUQLRTQLHQQ-UHFFFAOYSA-N 0.000 description 1
- NWFNSTOSIVLCJA-UHFFFAOYSA-L copper;diacetate;hydrate Chemical compound O.[Cu+2].CC([O-])=O.CC([O-])=O NWFNSTOSIVLCJA-UHFFFAOYSA-L 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000002542 deteriorative effect Effects 0.000 description 1
- MNNHAPBLZZVQHP-UHFFFAOYSA-N diammonium hydrogen phosphate Chemical compound [NH4+].[NH4+].OP([O-])([O-])=O MNNHAPBLZZVQHP-UHFFFAOYSA-N 0.000 description 1
- 235000019838 diammonium phosphate Nutrition 0.000 description 1
- 229910000388 diammonium phosphate Inorganic materials 0.000 description 1
- 230000001747 exhibiting effect Effects 0.000 description 1
- 239000008098 formaldehyde solution Substances 0.000 description 1
- 235000019253 formic acid Nutrition 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 229910000856 hastalloy Inorganic materials 0.000 description 1
- 238000009998 heat setting Methods 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 239000001023 inorganic pigment Substances 0.000 description 1
- 235000014655 lactic acid Nutrition 0.000 description 1
- 239000006233 lamp black Substances 0.000 description 1
- MOUPNEIJQCETIW-UHFFFAOYSA-N lead chromate Chemical compound [Pb+2].[O-][Cr]([O-])(=O)=O MOUPNEIJQCETIW-UHFFFAOYSA-N 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 235000006408 oxalic acid Nutrition 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 1
- 239000010452 phosphate Substances 0.000 description 1
- 235000021317 phosphate Nutrition 0.000 description 1
- IEQIEDJGQAUEQZ-UHFFFAOYSA-N phthalocyanine Chemical compound N1C(N=C2C3=CC=CC=C3C(N=C3C4=CC=CC=C4C(=N4)N3)=N2)=C(C=CC=C2)C2=C1N=C1C2=CC=CC=C2C4=N1 IEQIEDJGQAUEQZ-UHFFFAOYSA-N 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 235000019260 propionic acid Nutrition 0.000 description 1
- 229960003351 prussian blue Drugs 0.000 description 1
- 239000013225 prussian blue Substances 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 239000001054 red pigment Substances 0.000 description 1
- 230000009528 severe injury Effects 0.000 description 1
- 229910000029 sodium carbonate Inorganic materials 0.000 description 1
- 229910052979 sodium sulfide Inorganic materials 0.000 description 1
- GRVFOGOEDUUMBP-UHFFFAOYSA-N sodium sulfide (anhydrous) Chemical compound [Na+].[Na+].[S-2] GRVFOGOEDUUMBP-UHFFFAOYSA-N 0.000 description 1
- AKHNMLFCWUSKQB-UHFFFAOYSA-L sodium thiosulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=S AKHNMLFCWUSKQB-UHFFFAOYSA-L 0.000 description 1
- 235000019345 sodium thiosulphate Nutrition 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 235000011044 succinic acid Nutrition 0.000 description 1
- 150000003444 succinic acids Chemical class 0.000 description 1
- 238000006557 surface reaction Methods 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 235000002906 tartaric acid Nutrition 0.000 description 1
- 239000004753 textile Substances 0.000 description 1
- 238000001029 thermal curing Methods 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
- 239000004416 thermosoftening plastic Substances 0.000 description 1
- 210000002268 wool Anatomy 0.000 description 1
Images
Classifications
-
- 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
- D02G1/00—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics
- D02G1/02—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics by twisting, fixing the twist and backtwisting, i.e. by imparting false twist
- D02G1/0286—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics by twisting, fixing the twist and backtwisting, i.e. by imparting false twist characterised by the use of certain filaments, fibres or yarns
Definitions
- the present invention is directed toward a process for the preparation of bulky yarn. More specifically it' is directed to a process for making a laundry-resistant bulkyrayon yarn by treating yarn chemically along with mechanical twisting and de-twisting.
- thermoplastic yarns such as nylon may be given a fairly permanent crimp by. heating highly twisted yarn, preferably in the presence of steam, to set the twist, followed by untwisting.
- the resulting yarn has a strongly curled or crimped woolly appearance -(see U.S. 2,290,253 and 2,564,245).
- the prior art describes a process wherein a rayon yarn is impregnated withformaldehyde, twisted, cured, and detwisted to produce a woolly yarn. In a modification of this process a rayon yarn is given a supertwist, moistened.
- a cross-linked cellulosicfiber by means which willavoid the degradation of the fiber which accompanies conventional methods of formaldehyde treatment.
- a further object is the provision of means for producing. a bulky cellulosic yarn which can be more rapidly crosslinked by conventional means than plain viscose rayon and will have a lower water retention and a correspondinglygreater dimensionalstability when wet-
- a further object is the provision of a process of the foregoing type which will avoid the dyeing difiiculties mentioned above.
- the small pigment particles embedded in the yarn open up'the cellulosic structure, making it more accessible to the hot formaldehyde, and thus permit a considerably greater amount of surface reaction between thecellulose and formaldehyde than would be the case with anunpigmented rayon fiber.
- the color-spun yarn canbe' cross-linked withfor'maldehyde in shorter time than could a plain viscose rayon fiber, which means 2 a shorter time of exposure of the fiber to the acid reaction environment. This of course results in less fiber degradation as described above. This process also avoids the uneven dyeing which would result if the dye were applied to the cross-linked detwisted fiber.
- Suitablecolored inorganic pigment may be employed to obtain the desired color or shade.
- a yellow color ochre, sienna, chrome yellow, tin bronze, etc.
- a red color Venetian red, red lead, vermillion, etc.
- a blue color ultramarine, Prussian blue, Milori blue, etc.
- chrome green may be employed.
- brown raw umber, burnt umber or Van'dyke brown may be used. Toob'ta'in metallic effects, finely divided or colloidal metals may beemployed.
- shading that is to get darker colors, lamp black, graphite or other'black pigment'may be added. To obtain any other colors, the pigments may be mixed'as is well understood in the paint art.
- the pigment is preferably added to'the dope or spinning solution containing the cellulose compound in the form of a concentrated suspension in a liquid; usually about a 20% pigment-in-water dispersion.
- the amount of pigment added will vary with the depth of color desired and the nature of the pigment employed'and will generally be from 0.1 to 10% of the weight of the cellulosic material present in the finished yarn.
- the pigment is preferably in very fine form, the particles having a diameter of less than 0.1 to 5 microns for increased covering power. It is of importance to have the pigment of very fine size inorder to' obtain the desired depth of color without the necessity of incorporating a large amount of pigment as to'deleteriously affect the strength and the other properties of the yarn. This fine size may be-obtained by grinding the inorganic colored pigment either with water, an oil, part of the spinning solution, or the solvent used in the spinningsolution in a ball mill or colloid mill.
- the viscose, the spinning bath, etc., used in spinning the regenerated cellulose film is no part of the present invention and will not be detailed here.
- the viscose used is a normal orplain viscose having a sodium chloride salt test'value of from 3 to 6, containing from 6 to-9% cellulose, from 6 to 9% sodium hydroxide and ofnormal spinning viscosity.
- the setting bath-into which the modified viscose is extruded may be a coagulating and cellulose-regenerating bath of the composition normally used in the manufacture of fibers or yarns from viscose.
- Aqueous baths containing from 7 to 13.5% sulfuric acid and from 18 to 28% sodium sulfate are satisfactory.
- the bath may also containcomparatively small amounts, for example, from 0.1to-5 of zinc sulfate, as well as small amounts of other adjuvants or assistants. If it is desired toproduce self -crimpable fibers of the type described in U.S. 2,517,694 to Merion and Sisson, spinning baths as described in that patent may be used.
- the cake is dofied, wet-processed by conventional means, i.e., washed acid-free, desulfided, water rinsed, bleached, and treated successively with acid, antichlor, water, and a soft finish, followed by drying.
- a skein of the finished yarn of 300 denier and 30 filaments was then given a twist of 45 t.p.i. (turns per inch) and wound on a spool under tension.
- this form it was soaked for 20 minutes at 84 C. in a water solution of formaldehyde, 3.6% methanol, and 0.3% of a catalyst comprising the reaction product of 1.0 mole HCl, 0.9 mole monoethanolamine, and 2.0 moles formaldehyde (percentages are by weight based on total solution).
- the pH of the soaking bath was 3.5.
- the impregnated yarn was centrifuged to remove excess liquid, then dried for 25 minutes at 75 C., cured for 35 minutes at 150 C., and detwisted 47 t.p.i.
- the resulting yarn is strongly crimped and wool-like, and this eifect is substantially fast to Washing.
- its swelling capacity in water is reduced compared to that of plain viscose yarn.
- EXAMPLE II Another skein of the same yarn used in Example I was treated as in Example I but the curing catalyst was diammonium phosphate, (NH HPO The finished detwisted yarn was of the same quality as that of Example 1.
- a black pigment additive dispersion was made up from two components, one of which is Black VS, and 11.5% by weight dispersion of carbon black in water, and the other a 20% by Weight dispersion of Dianisidine Blue in water. These two dispersions were injected into a viscose solution at a point behind the spinning jet, the formulation being 32.6% by weight of the Black VS dispersion to 3% by Weight of the Dianisidine Blue dispersion based on the Weight of the cellulose in the viscose.
- the viscose solution contained 7.6% cellulose, 6.4% sodium hydroxide and 37% CS by weight and had a salt test of 4.7.
- the blended pigmented viscose was spun through a 60 hole jet at 60 m./m., into a spinning bath comprising an aqueous solution of 9% sulfuric acid, 2% zinc sulfate and 16% sodium sulfate, the bath temperature being 46 C. After a 14 inch immersion in the bath the resulting filaments were withdrawn as a yarn, box spun, and cake processed by the following steps: washed acid free, treated with a desulfiding solution comprising a weak solution of sodium sulfide and sodium carbonate, and then treated successively with a water rinse, a bleach, an acid, an antichlor (sodium thiosulfate), and a water wash.
- Example I The yarn was then treated in the manner of Example I, i.e., twisted, impregnated with hot formaldehyde in the presence of a curing catalyst, cured, and detwisted.
- the dry extensibility is a measure of the stress-strain relationship at the break point and here the higher the figure the better.
- wet extensibility a higher value is undesirable because it means that the yarn will stretch excessively under tension when wet. It is evident that on this point both colorspun samples are superior to the Helanca. The superior tensile strength of the colorspun samples is even greater than indicated when one considers that these two yarns are of smaller denier than the Helanca.
- the fixed formaldehyde content is an index of the amount of cross-linking in the fiber.
- the superiority of the colorspun yarn in this regard is especially surprising in view of the fact that Helanca is resin-coated and hence is amenable to three-way cross-linking between the resin, the formaldehyde, and the cellulose whereas colorspun yarn has only the two-way cross-linkage between the formaldehyde and the cellulose.
- the box-spun yarn from Example III did not give a water-resistant bulky yarn when treated in the order of: soaking 18 minutes in skein form at 84 C., drying, twisting 45 t.p.i., curing 35 minutes at C., and detwisting. Although bulky as formed, it flattens out in water like regular rayon.
- the useful cross-linking catalysts may be described as water-soluble weak acids and acid salts which, in concentrations of 0.25 to 0.50% by weight in water, form aqueous solutions having an acidic pH or which, on heating, dissociate to evolve a volatile base, leaving an acidic residue.
- preferred catalysts are monobasic and diabasic ammonium phosphates.
- Other operative catalysts are oxalic, tartaric, lactic, citric, formic, propionic, boric, and succinic acids, ZnCl NH4C1, and a mixture of Na SO and NaHSO
- a preferred catalyst is heterogeneous reaction product of 0.9 mole mend ethanolamine, 1.0 mole HCl, and 2.0 moles CH O.
- the reaction is favored by a pH of 3.5-2.9 in the treating bath.
- the reaction time should be .15-25 minutes, preferably about 20, and the temperature should be 84 C. :2. Raising the temperature of the bath is desirable in many respects. It penetrates better and gives uniform treatment as well as increasing the rate of reaction, i.e., cross-linking. Temperatures higher than about 84 C. at the preferred pH range of the bath are not desirable due to their deteriorating effect on the yarns. Of course the higher the temperature the shorter should be the time of exposure to the formaldehyde.
- the degree of twist is inversely proportional to the denier of the yarn. For example in twisting a 300 denier filament 45 t.p.i. is a practical value. At 150 denier the t.p.i. could go up to 55. At 400 denier the t.p.i. would be 35-40.
- the invention provides a new method of improving the crimp or bulk and reliably decreasing and controlling the water retention and wet extensibility of regenerated cellulose yarns and textiles.
- a process for producing a bulky yarn from a pigmental cellulosic yarn comprising supertwisting the pigmented yarn, setting the twist therein by impregnating the twisted yarn with formaldehyde at an elevated temperature and in the presence of an acidic catalyst, thermally curing the impregnated yarn, and then detwisting the cellulosic yarn to produce a wool efiect which is substantially fast to washing.
- reaction product is formed from about 0.9 mole monoethanolamine, about 1.0 mole HCl, and about 2.0 moles formaldehyde.
- a process for producing a bulky yarn from a pigmented cellulosic yarn comprising supertwisting a pigmented yarn of -400 denier to a twist of about 55-40 turns per inch, impregnating the twisted yarn with a formaldehyde solution containing 0.25-0.3% of an acidic catalyst, said solution having a temperature of about 83 C.86 C., centrifuging, drying at an elevated temperature, curing for a time of 10-40 minutes at a temperature of 100175 C., and then detwisting to zero to produce a crimped yarn.
Description
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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US611217A US2895288A (en) | 1956-09-21 | 1956-09-21 | Production of bulky colorspun rayon yarn |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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US611217A US2895288A (en) | 1956-09-21 | 1956-09-21 | Production of bulky colorspun rayon yarn |
Publications (1)
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US2895288A true US2895288A (en) | 1959-07-21 |
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US611217A Expired - Lifetime US2895288A (en) | 1956-09-21 | 1956-09-21 | Production of bulky colorspun rayon yarn |
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Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3206924A (en) * | 1961-09-27 | 1965-09-21 | Owens Corning Fiberglass Corp | Method of forming fibrous glass yarn |
US3365771A (en) * | 1965-08-26 | 1968-01-30 | Courtaulds North America Inc | Method of making stretch yarns and fabrics |
US3365769A (en) * | 1965-07-22 | 1968-01-30 | Courtaulds North America Inc | Method of making stretch yarns and fabrics |
US3365767A (en) * | 1964-04-28 | 1968-01-30 | Courtaulds North America Inc | Method for making stretch yaens and fabrics |
US3425208A (en) * | 1963-10-30 | 1969-02-04 | Leesona Corp | Method for producing textured yarns of cellulosic fibres |
US3514248A (en) * | 1965-06-12 | 1970-05-26 | Basf Ag | Production of bulked yarn from thermoplastic high polymers |
US4182527A (en) * | 1978-04-27 | 1980-01-08 | Meehan Frances R | Latch hooking method |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2019185A (en) * | 1932-03-10 | 1935-10-29 | Heberlein Patent Corp | Artificial fiber and process of producing same |
GB534698A (en) * | 1938-09-14 | 1941-03-14 | Ici Ltd | Treatment of synthetic polyamide filaments, fabrics, films and other articles, to improve their resilience and other properties |
US2516562A (en) * | 1946-12-03 | 1950-07-25 | Du Pont | Process of making artificial wool from nylon fibers |
US2777277A (en) * | 1950-12-12 | 1957-01-15 | Vaucanson Silk Mills Inc | Method for producing crimped superpolyamidic threads and novel threads obtained |
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1956
- 1956-09-21 US US611217A patent/US2895288A/en not_active Expired - Lifetime
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2019185A (en) * | 1932-03-10 | 1935-10-29 | Heberlein Patent Corp | Artificial fiber and process of producing same |
GB534698A (en) * | 1938-09-14 | 1941-03-14 | Ici Ltd | Treatment of synthetic polyamide filaments, fabrics, films and other articles, to improve their resilience and other properties |
US2516562A (en) * | 1946-12-03 | 1950-07-25 | Du Pont | Process of making artificial wool from nylon fibers |
US2777277A (en) * | 1950-12-12 | 1957-01-15 | Vaucanson Silk Mills Inc | Method for producing crimped superpolyamidic threads and novel threads obtained |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3206924A (en) * | 1961-09-27 | 1965-09-21 | Owens Corning Fiberglass Corp | Method of forming fibrous glass yarn |
US3425208A (en) * | 1963-10-30 | 1969-02-04 | Leesona Corp | Method for producing textured yarns of cellulosic fibres |
US3365767A (en) * | 1964-04-28 | 1968-01-30 | Courtaulds North America Inc | Method for making stretch yaens and fabrics |
US3514248A (en) * | 1965-06-12 | 1970-05-26 | Basf Ag | Production of bulked yarn from thermoplastic high polymers |
US3365769A (en) * | 1965-07-22 | 1968-01-30 | Courtaulds North America Inc | Method of making stretch yarns and fabrics |
US3365771A (en) * | 1965-08-26 | 1968-01-30 | Courtaulds North America Inc | Method of making stretch yarns and fabrics |
US4182527A (en) * | 1978-04-27 | 1980-01-08 | Meehan Frances R | Latch hooking method |
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