US2608460A - Reduction of the swelling index of regenerated cellulose fibers by steam under pressure - Google Patents
Reduction of the swelling index of regenerated cellulose fibers by steam under pressure Download PDFInfo
- Publication number
- US2608460A US2608460A US211195A US21119551A US2608460A US 2608460 A US2608460 A US 2608460A US 211195 A US211195 A US 211195A US 21119551 A US21119551 A US 21119551A US 2608460 A US2608460 A US 2608460A
- Authority
- US
- United States
- Prior art keywords
- steam
- vessel
- pressure
- regenerated cellulose
- fibers
- 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
- 239000004627 regenerated cellulose Substances 0.000 title claims description 12
- 230000008961 swelling Effects 0.000 title description 7
- 229920003043 Cellulose fiber Polymers 0.000 title 1
- 239000000835 fiber Substances 0.000 claims description 15
- 238000000034 method Methods 0.000 claims description 14
- 238000004326 stimulated echo acquisition mode for imaging Methods 0.000 claims description 8
- 229920006395 saturated elastomer Polymers 0.000 claims description 7
- 238000006116 polymerization reaction Methods 0.000 claims description 3
- 239000000463 material Substances 0.000 description 9
- 229920002678 cellulose Polymers 0.000 description 8
- 239000001913 cellulose Substances 0.000 description 8
- 239000004753 textile Substances 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 238000009833 condensation Methods 0.000 description 3
- 230000005494 condensation Effects 0.000 description 3
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 3
- 229910052753 mercury Inorganic materials 0.000 description 3
- 229920000297 Rayon Polymers 0.000 description 2
- 230000002745 absorbent Effects 0.000 description 2
- 239000002250 absorbent Substances 0.000 description 2
- 238000004383 yellowing Methods 0.000 description 2
- LUTSRLYCMSCGCS-BWOMAWGNSA-N [(3s,8r,9s,10r,13s)-10,13-dimethyl-17-oxo-1,2,3,4,7,8,9,11,12,16-decahydrocyclopenta[a]phenanthren-3-yl] acetate Chemical compound C([C@@H]12)C[C@]3(C)C(=O)CC=C3[C@@H]1CC=C1[C@]2(C)CC[C@H](OC(=O)C)C1 LUTSRLYCMSCGCS-BWOMAWGNSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000003292 diminished effect Effects 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 150000004677 hydrates Chemical class 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- -1 pellicles Substances 0.000 description 1
- 239000002964 rayon Substances 0.000 description 1
- 238000010025 steaming Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Classifications
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M11/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising
- D06M11/01—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with hydrogen, water or heavy water; with hydrides of metals or complexes thereof; with boranes, diboranes, silanes, disilanes, phosphines, diphosphines, stibines, distibines, arsines, or diarsines or complexes thereof
- D06M11/05—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with hydrogen, water or heavy water; with hydrides of metals or complexes thereof; with boranes, diboranes, silanes, disilanes, phosphines, diphosphines, stibines, distibines, arsines, or diarsines or complexes thereof with water, e.g. steam; with heavy water
Definitions
- This invention relates to a new and improved process of treatin absorbent textile fibers and to the product resulting therefrom. More particularly, it relates to substantially reducing the hygroscopicity of regenerated cellulose staple fibers and the product resulting therefrom.
- Hygroscopicity is herein defined as the index of swelling and is determined as follows: The cellulose material; after being saturated with water, as by dipping in water, is centrifuged for minutes in a centrifugal drier-3D centimeters in diameter and rotating at 3000 R. P. M. .
- the index of swelling is the weight of the water re tained by the centrifuged material compared with the original dry material.
- U. S. Patent No. 1,544,885 to Brandenberger discloses a process of reducing the hygroscopicity of cellulose hydrates, and particularly regenerated cellulose, by subjecting such material in its dry state to the action of dry saturated steam, preferably under pressure, in a closed vessel. Such a process will reduce the swelling index of regenerated cellulose having a swelling index of between 80% and 150% to 50% or below.
- the treated product acquired other beneficial results:
- An object of this invention is to. provide a method of substantially reducing the swelling index of regenerated cellulose staple fibers without any appreciable depolymerization of the cellulose.
- a further object of the invention is to provide a method of treating regenerated cellulose textile materials to materially reduce their swellingindex without affecting their serimetric properties.
- Example One or more 200 pound bales of staple fibers of regenerated cellulose obtained by either the viscose or cuprammonium processes is placed in a large autoclave or is formed into a ball which is placed in such autoclave. After closing the autoclave it is subjected to vacuum of from 5 centimeters to 10 centimeters of mercury. Dry saturated steam of a pressure of from 1.8 to 2 kg. per square centimeter is then introduced until the pressure in the autoclave is brought up to the steam pressure. The steaming is continued a few minutes to bring the entire mass up to the steam temperature.
- the steam is then shut off and the autoclave again evacuated as before to from 5 to 10 centimeters of mercury to remove all of the moisture from the: fibers, after which the steam is again introduced and crease; in elongation. tioni's due simply to the. shrinkage produced in the courseofth treatment andis not due .to any I Degree-or Eohimcri gwemltgl zation Index- Emma Untreated fibers Wil a; BZQ; 105; Treated fibers 320 58
- the process is carried out with. dry saturated steam under a pressure which mayvary between 1.5 and 15 kg. per square centimeter and. at. the corresponding temperature. In general, a higher pressure. requires a shorter treatment and alower pressure. requires. a. longer treatment; For example, when a pressure. of. 1d kg. per square centimeter isv utilized, a treatment of several minutes is sufficient while with apressure of 1 kg.
- pressures of. from. 1.8 to 2.0' kg. per square centimeter for a period. of 2 to 2' hours are. employed.
- the serlmetricv properties of the textilesv are. not. diminished in the least.
- the. tenacity oi regenerated cellulose rayon yarn. is slightly reduced.
- such slight reduction in tenacity is. compensated by an in- Thisincrease in elongadeterioration. of the cellulose material.
- Amethod. o'f'materially reducing the hygroscopie-ity' oi" regenerated cellulose staple fibers without... substantially changing their degree of polymerization which comprises disposing a bale of. said. fibers. in-a closed vessel, evacuating the atmosphere in said vessel, then from an outside source introducing dry saturated steam under a pressure of from 1.5 to 15 kg. per sq. cm. into said. vessel until the interior of said vessel is brought up to the steam pressure and the mass is heatedthroughout then shuttingv ofi the steam andagain evacuating, the interior of said vessel, again introducing said steam into said vessel. to bring. the interior ofsafd vessel up to steam pressure of. the entering steam and maintaining said steam pressure in..said. vessel for a period 01 a few minutes to four hours, the time varying inversely as. the pressure.v
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Chemical Or Physical Treatment Of Fibers (AREA)
- Artificial Filaments (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR935383T | 1944-04-21 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US2608460A true US2608460A (en) | 1952-08-26 |
Family
ID=9456758
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US211195A Expired - Lifetime US2608460A (en) | 1944-04-21 | 1951-02-15 | Reduction of the swelling index of regenerated cellulose fibers by steam under pressure |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US2608460A (is") |
| BE (1) | BE465688A (is") |
| FR (1) | FR935383A (is") |
| GB (1) | GB615264A (is") |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2936212A (en) * | 1951-08-15 | 1960-05-10 | Pluria Ab | Method of treating with liquid a material in granular, threaded, or fibrous form |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1544885A (en) * | 1923-06-04 | 1925-07-07 | Applic De Brevets Et Procedes | Production of hydrated celluloses |
| US2119261A (en) * | 1935-07-27 | 1938-05-31 | Bernard R Andrews | Method of drying synthetic fiber |
-
0
- BE BE465688D patent/BE465688A/xx unknown
-
1944
- 1944-04-21 FR FR935383D patent/FR935383A/fr not_active Expired
-
1946
- 1946-06-14 GB GB17988/46A patent/GB615264A/en not_active Expired
-
1951
- 1951-02-15 US US211195A patent/US2608460A/en not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1544885A (en) * | 1923-06-04 | 1925-07-07 | Applic De Brevets Et Procedes | Production of hydrated celluloses |
| US2119261A (en) * | 1935-07-27 | 1938-05-31 | Bernard R Andrews | Method of drying synthetic fiber |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2936212A (en) * | 1951-08-15 | 1960-05-10 | Pluria Ab | Method of treating with liquid a material in granular, threaded, or fibrous form |
Also Published As
| Publication number | Publication date |
|---|---|
| FR935383A (fr) | 1948-06-17 |
| BE465688A (is") | |
| GB615264A (en) | 1949-01-04 |
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