US1584005A - Method of manufacturing artificial silk and other products from nitrocellulose - Google Patents
Method of manufacturing artificial silk and other products from nitrocellulose Download PDFInfo
- Publication number
- US1584005A US1584005A US723485A US72348524A US1584005A US 1584005 A US1584005 A US 1584005A US 723485 A US723485 A US 723485A US 72348524 A US72348524 A US 72348524A US 1584005 A US1584005 A US 1584005A
- Authority
- US
- United States
- Prior art keywords
- alcohol
- nitrocellulose
- collodion
- dissolved
- coagulation
- 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
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Classifications
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F2/00—Monocomponent artificial filaments or the like of cellulose or cellulose derivatives; Manufacture thereof
- D01F2/24—Monocomponent artificial filaments or the like of cellulose or cellulose derivatives; Manufacture thereof from cellulose derivatives
- D01F2/26—Monocomponent artificial filaments or the like of cellulose or cellulose derivatives; Manufacture thereof from cellulose derivatives from nitrocellulose
Definitions
- Our invention relates to the known process in which the collodion obtained by dissolvin nitrocellulose hydrate in a mixture of ethy alcohol and ether is given desired form .by exuding it through an orifice and the filament or other product thus formed is coagulated by the removal of the solvents.
- the coagulating bath should have a strength of at least 40%.
- the rate of coagulation in such a bath can be regulated by dissolving in dilute ethyl alcohol a neutral inorganic salt orsalts.
- zinc chloride is preferably used because among other reasons, it has the valuable pro erty of being soluble not only in alcohol, ut also in ether.
- the solvents and salt solutions can be easily and almost completely recovered agu'ation bath consisting of 50% ethyl alcohol in which 20 parts calcium chloride have been dissolved per 100 volume parts.
- the threads coming out of the orifices in a semi-coagulated state are elongated by tension'to the desired fineness and the filaments are washed preferably first with 40% alcohol andfinally with water.
- Nitrocellulose hydrate containing 20 to 30% water is dissolved in a mixture of 50 parts ether and 50 parts ethyl alcohol and the collodion so formed, is spun into ethyl alcohol of 40% strength in which 50 parts of zincchloride have been dissolved per 100 volume parts of dilute alcohol, the threads so formed are directly wound on bobbins, rotating in water.
- the method of regulating coagulation which consists in exuding the collodion into a bath composed of one or more neutral inorganic salts dissolved in dilute alcohol of from 40 to 60 strength.
Description
Patented May 11, 1926.-
UNITED STATES PATENT OFFICE.
EMILE BINDSCHEDLER, F LANsnowNn,
PENNSYLVANIA, AND GEORGE J'UER, 0F
HOIEWELL, VIRGINIA, ASSIG-NORS TO TUBIZE ARTIFICIAL SILK COMPANY OF AMERICA, A CORPORATION OF DELAWARE. v
No Drawing.
Our invention relates to the known process in which the collodion obtained by dissolvin nitrocellulose hydrate in a mixture of ethy alcohol and ether is given desired form .by exuding it through an orifice and the filament or other product thus formed is coagulated by the removal of the solvents.
It has been proposed to coagulate nitrocellulose collodion by passing it into a bath of dilute ethyl alcohol, preferably of a strength varying from 25 to 60%. We have found that to secure clear and lustrous filaments,
'the coagulating bath should have a strength of at least 40%. We have also discovered that the rate of coagulation in such a bath can be regulated by dissolving in dilute ethyl alcohol a neutral inorganic salt orsalts.
Such regulation of coagulation can be availed of to vary in some degree the character of the product and the operation of the process. 1
Certain metallic salts, especially haloids, when dissolved in dilute alcohol have in most cases a pronounced retarding effect on the rate of coagulation. We found calcium chloride and magnesium chloride especially well adapted for the purpose, these salts, havin a further advantage of being cheap and t eir aqueous solutions are miscible,
to a great extent, with the usual ether-alcohol mixture.
lVhere acceleration of coagulation is desired, zinc chloride is preferably used because among other reasons, it has the valuable pro erty of being soluble not only in alcohol, ut also in ether.
We have availedourselves of the retarding effect of calcium chloride or similar saltdissolved in dilute alcohol on the coagulation of the exuded filaments to produce a thread of finer denier and we effect this by winding up the filaments at a speed greater than the rate of exudation of the collodion through an orifice, the resultbe-ing that the still piestic thread is drawn out and made finer before.
coagulation gives permanent form to it.
By preference we complete thecoagulation and extract the salt by passing the'thread through a second bath of dilute ethyl alcohol of from 40 to strength, but this is not essential and the thread may be passed directly to the bobin rotating in water which will remove any remaining solt elit, alcohol Application filed July 1, 1924. Serial No. 723,485.
METHOD OF MANUFACTURING ARTIFICIAL SILK AND OTHER PRODUCTS FROM N ITROOELLULOSE. Y v
andsalt. The solvents and salt solutions can be easily and almost completely recovered agu'ation bath consisting of 50% ethyl alcohol in which 20 parts calcium chloride have been dissolved per 100 volume parts. The threads coming out of the orifices in a semi-coagulated state are elongated by tension'to the desired fineness and the filaments are washed preferably first with 40% alcohol andfinally with water.
After twisting and reeling, the threads are denitrated in the usual manner and clear and lustrous filaments are produced.
The following is a specific example of the application of our invention in case acceleration of the coagulation is desired:
Nitrocellulose hydrate containing 20 to 30% water is dissolved in a mixture of 50 parts ether and 50 parts ethyl alcohol and the collodion so formed, is spun into ethyl alcohol of 40% strength in which 50 parts of zincchloride have been dissolved per 100 volume parts of dilute alcohol, the threads so formed are directly wound on bobbins, rotating in water.
- Having now'described-our invention, What we claim as new and desire to secure by Letters Patent, is: f
1. In the .process manufacturing formed. products from nitrocellulose hydrate dissolved in alcohol and ether unadmixed :with other chemicals by exuding the collodion'through an orifice to give form to the product and coagulating the exuded product, the method of regulating coagulation which consists in'ex'uding the collodion into a bath composed of one or more neutral inorganic salts dissolved in dilute alcohol.
- 2. In the process of manufacturing formed products from nitrocellulose hydrate dissolved in alcohol and ether by exuding the collodion through an orifice to give form to the product and coagulating the exuded product, the method of regulating coagulation which consists in exuding the collodion into a bath composed of one or more metallic haloids dissolved in dilute alcohol.
3. In the process of manufacturing formed products from nitrocellulose hydrate dissolved in alcohol and ether by exuding the collodion through an orifice to give form to the product and coagulating the exuded product, the method of retarding coagulation which consists in exuding the collodion into a bath composed of calcium chloride dissolved in dilute alcohol.
4. .In the method of manufacturing artificial silk from nitrocellulose hydrate dissolved in alcohol and ether unadmixed with other chemicals by exuding the collodion through an orifice, and coagulating the filament, the method of retarding the coagulation and producing a filament of fine denier which consists in exuding the collodion filament into a bath of dilute alcohol having dissolved in it neutral inorganic salts which retard coagulation and drawing the filament through said bath at a rate exceeding the rate of exudation so as to elongate and reduce the denier of the filament.
5. In the process of manufacturing formed products from nitrocellulose hydrate dissolved in alcohol and ether unadmixed with other chemicals by exudin the collodion through an orifice to give Iorm to the product and coagulating the exuded product, the method of regulating coagulation which consists in exuding the collodion into a bath composed of one or more neutral inorganic salts dissolved in dilute alcohol of from 40 to 60 strength.
6. In the process of manufacturing formed products from nitrocellulose hydrate dissolved in alcohol and ether unadmixed with other chemicals by exuding the collodion through an orifice to give form to the product and coagulating the exuded prodnot, the method of regulating coagulation.
which consists in exuding the collodion into a bath composed of one or more neutral in organic salts dissolved in dilute alcohol and afterwards through a second bath of alcohol diluted to 40 to 60 strength.
EMILE .BINDSCHEDLER. GEORGE JUER.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US723485A US1584005A (en) | 1924-07-01 | 1924-07-01 | Method of manufacturing artificial silk and other products from nitrocellulose |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US723485A US1584005A (en) | 1924-07-01 | 1924-07-01 | Method of manufacturing artificial silk and other products from nitrocellulose |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US1584005A true US1584005A (en) | 1926-05-11 |
Family
ID=24906467
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US723485A Expired - Lifetime US1584005A (en) | 1924-07-01 | 1924-07-01 | Method of manufacturing artificial silk and other products from nitrocellulose |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US1584005A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3256371A (en) * | 1963-01-18 | 1966-06-14 | Celanese Corp | Spinning of high nitrogen content cellulose nitrate filments |
-
1924
- 1924-07-01 US US723485A patent/US1584005A/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3256371A (en) * | 1963-01-18 | 1966-06-14 | Celanese Corp | Spinning of high nitrogen content cellulose nitrate filments |
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