|Publication number||US1707164 A|
|Publication date||Mar 26, 1929|
|Filing date||Aug 27, 1926|
|Publication number||US 1707164 A, US 1707164A, US-A-1707164, US1707164 A, US1707164A|
|Export Citation||BiBTeX, EndNote, RefMan|
|Referenced by (11), Classifications (12)|
|External Links: USPTO, USPTO Assignment, Espacenet|
Patented Mar. 26, 1929.
UNITED STATES 1,707,164 '?A;'l"ENT OFFICE.
HANS KARPLUS, FRANKFORT-ON-THE-MAIN,
MANUFACTURE OF HOLLOW ARTIFICIAL TEXTILE THREADS.
No Drawing. Application filed August 27, 1926, Serial ITo. 132,043, and in Czechoslovakia September It is already known to produce hollow tificial textile threads by spinning solutionsin which gases are einulsiioned or dissolved, or into which a substance has been introduced which, like for instance sodium carbonate, on
leaving the spinning nozzle can produce gas the hollow threads or bubble threads thus produced, have the great drawback that for instance when treated with warm baths or when dried in warm air, as is unavoidable for the finishing of the textile material, they do not withstand well the action of such increased temperatures, the gas bubbles already contained in the freshly spun thread, expanding namely to a great extent during such treatment in the heat and causing frequent bursting, that is to say the enclosing iibre layer is broken by the expanding gas bubbles.
It has 110w been found that hollow artificial textile structures can be obtained without these heavy drawbacks, by incorporating in the spinning solutions liquid or solid substances which during the whole of the fol lowing spinning and finishing process, can not develop any bubl'ile-iforming vapour or gases, namely neither under any tl'ierlnic nor chemical. action. Owing to the absence of this vapour or gas generation, the risk of a bursting oi the gas bubbles occluded in the thread is avoided. The substances incorporated are removed from the spun thread only subsequently, namely by dissolving them out with a suitable solvent. As the spinning solutions there could be used any cellulose solution, such as viscose and copper-oxideaininonia solutions, further solutions of nitrocellulose and acctyl cellulose.
The process is carried out by finely distributing solid or liquid substances which are insoluble to a large extent or completely in the spinning solutions, in the said solutions if necessary to the colloidal dispersity de gree. As substances suitable for the present process, that is to, say which do not generate during the process of manufacture of the threads any bubble forming vapour or gases in the said threads either under the thermic or chemical action, may be mentioned by way of example, for the viscose process; mineral, animal or vegetable oils such as lubricating oil, parallin oil; further ininerahvegetable and animal fats, waxes and the lil;e ,'turther solid paratiin, metal soaps, fatty acids, naphthenic acids, resins. Such substances can be easily emulsionedor suspended in the spin ning solution in a state of such a fine division that the spinning process is in no way affected by their presence. The spun threads are submitted in the well known manner to a subsequent treatment and the incorporated substances are finally removed by dissolving them out by means of a suitable solvent. This dissolving out of the incorporated substances finely distributed or divided liquid or solid substances within the threads only during the spinning process, more particularly under the chemical action of the precipitation bath. These added substances, or these substances separating in a state of line division, must be again chosen in such a manner that a vapour or gas generation during the process of manu'li'acture of the threads is avoided. vVhen employing viscose as the spinning solution, as additional substances, could be used for instance alkali salts of fatty acids, rcsinic acids or their hydroxylizcd or sulphonated products. These additional substances, first dissolved in the viscose, are decomposed only by the action oi"- the precipitation bath and separate free fatty acids, resinic acids etc., in a finely divided state. The addition of soaps to the viscose has already been recommended, but the substances separated by the decomposing precipitation bath, are retained completely or to a large extent in the thread. According to the present process however, these separated, finely divided substances, are subsequently dissolved out again by means of a suitable solvent such as for instance organic solvents, or by a suflicient treatment with alkaline baths, in order to enable the desired hollow cells or bubbles to be produced in'thc thread.
Ewamplc J.-22 gr. bone oil or paraffin oil are finely emulsioned in 400 gr. of viscose. The spinning solution obtained is spun in the Well known manner in acid salt baths, the threads obtained are Washed and dried. The incorporated oi] particles are then extracted by means of benzol, carbon sulphide amyl alcohol. A textile thread of great lightness and softness is then produced, permeated by hollow spaces and showing good structure and. strength.
Example 9.25 gr. sodium oleate are dissolved in 400 gr. of viscose. The spinning solution obtained is spun as set forth in the Example 1, and submitted to subsequent treatment. The oleic acid separated in the thread produced in a state of fine division, by the action of the precipitating bath is dissolved out by benzin or by a 5% solution of soda lye.
1. A process for the manufacture of hollow artificial textile threads of interior hollow cellular structure from spinning solutions of any desired kind such as for instance, viscose, copper-oXide-annnonia, celluloseacetate, nitro-cellulose solutions, comprising incorporating into the solution to be spun, liquid or solid organic, non-crystalline substances which, during the Whole following spinning and finishing process of the threads, cannot form any bubbleiorming vapours or gases, and subsequently removing the said substances from the textile threads by means of suitable solvents.
2. A step in the process as claimed in claim 1, comprising distributing the substances incorporated in the spinning solution as emulsions or suspensions in said solution, eventually up to colloidal fineness.
In testimony whereof I have signed my name to this specification.
|Citing Patent||Filing date||Publication date||Applicant||Title|
|US2494468 *||Nov 12, 1943||Jan 10, 1950||Swiss Borvisk Company||Method for the continuous production of synthetic fibers|
|US3188689 *||Jun 7, 1962||Jun 15, 1965||Du Pont||Spinneret assembly|
|US3235634 *||Feb 8, 1962||Feb 15, 1966||Rhovyl Sa||Process for producing microporous fibers and vinyl chloride spinning solutions therefor|
|US3418405 *||Sep 4, 1963||Dec 24, 1968||Kurashiki Rayon Co||Method of manufacturing flat viscose fibers|
|US3879506 *||May 26, 1971||Apr 22, 1975||Chatillon Societa & 0 Anonima||Process for producing chloro-vinyl fibers having modified light reflection|
|US4035459 *||May 1, 1975||Jul 12, 1977||Chemical Systems, Inc.||Process for spinning dry-fiber cellulose acetate hollow fiber membranes|
|US4219517 *||Oct 12, 1978||Aug 26, 1980||Puropore Inc.||Process for spinning dense hollow fiber cellulosic membrane|
|US4376746 *||Sep 17, 1981||Mar 15, 1983||Ametek, Inc.||Formation of hollow tapered brush bristles|
|US4444663 *||Sep 14, 1981||Apr 24, 1984||Terumo Corporation||Membrane and method for manufacture thereof|
|US4594207 *||Feb 10, 1983||Jun 10, 1986||Akzo Nv||Method for the production of porous bodies with adjustable total pore volume, adjustable pore size and adjustable pore walls|
|US5659994 *||Nov 29, 1995||Aug 26, 1997||Berkley, Inc.||Braided flyline|
|U.S. Classification||264/49, 106/169.1, 106/168.1, 264/DIG.440, 106/166.1, 106/167.1, 425/DIG.120|
|Cooperative Classification||Y10S264/44, D01D5/247, Y10S425/012|