RO97076B1 - Polyvinyl alcohol fibre and process for producing the same - Google Patents
Polyvinyl alcohol fibre and process for producing the sameInfo
- Publication number
- RO97076B1 RO97076B1 RO129118A RO12911887A RO97076B1 RO 97076 B1 RO97076 B1 RO 97076B1 RO 129118 A RO129118 A RO 129118A RO 12911887 A RO12911887 A RO 12911887A RO 97076 B1 RO97076 B1 RO 97076B1
- Authority
- RO
- Romania
- Prior art keywords
- polyvinyl alcohol
- degree
- water
- bath
- dried
- Prior art date
Links
- 239000004372 Polyvinyl alcohol Substances 0.000 title abstract 4
- 229920002451 polyvinyl alcohol Polymers 0.000 title abstract 4
- 239000000835 fiber Substances 0.000 title abstract 2
- 238000000034 method Methods 0.000 title abstract 2
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 abstract 5
- 229910052938 sodium sulfate Inorganic materials 0.000 abstract 3
- 235000011152 sodium sulphate Nutrition 0.000 abstract 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract 3
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 abstract 2
- 229920000742 Cotton Polymers 0.000 abstract 1
- 241001251094 Formica Species 0.000 abstract 1
- 150000001299 aldehydes Chemical class 0.000 abstract 1
- 238000009835 boiling Methods 0.000 abstract 1
- 230000015271 coagulation Effects 0.000 abstract 1
- 238000005345 coagulation Methods 0.000 abstract 1
- 239000012153 distilled water Substances 0.000 abstract 1
- 238000001125 extrusion Methods 0.000 abstract 1
- 230000007062 hydrolysis Effects 0.000 abstract 1
- 238000006460 hydrolysis reaction Methods 0.000 abstract 1
Landscapes
- Artificial Filaments (AREA)
Abstract
Inventia se refera la o fibra din alcool polivinilic, care, în scopul largirii gamei sortimentale si asigurarii unor caracteristici apropiate de a fibrelor naturale de bumbac, este constituita din alcool polivinilic cu grad de hidroliza de peste 99%, greutate moleculara de 1700...2000 si are un grad de acetizare de 28...37%, un grad de orientare de 0,935, un indice de cristalinitate de 52...65, contractie la fierbere sub 10% si se obtine printr-un procedeu ce consta în extruderea unei solutii de 14...16% alcool polivinilic în apa distilata într-o baie de coagulare formata dintr-o solutie suprasaturata de sulfat de sodiu în apa, filamentele formate fiind etirate umed într-o baie de sulfat de sodiu la o temperatura de minimum 90 degree C, uscate, pretermofixate la temperatura de 150 degree C, etirate uscat la 170...195 degree C, termofixate cu aer cald la temperatura de 185...195 degree C, acetizate într-o baie de acetizare formata din apa, acid sulfuric, sulfat de sodiu si aldehida formica, la temperatura de 90 degree C.The invention relates to a polyvinyl alcohol fiber, which, in order to broaden the assortment range and provide characteristics close to natural cotton fibers, is made of polyvinyl alcohol with a degree of hydrolysis of over 99%, a molecular weight of 1700 ... 2000 and has an acetic degree of 28-37%, an orientation degree of 0.935, a crystallinity index of 52-65, a boiling shrinkage below 10% and is obtained by a process consisting of extrusion a solution of 14-16% polyvinyl alcohol in the distilled water in a coagulation bath formed from a supersaturated solution of sodium sulfate in water, the filaments formed being wetted in a sodium sulphate bath at a temperature of at least 90 degrees C, dried, pretermophixed at 150 degrees C, dried at 170 DEG-195 DEG C., hot-melted with warm air at 185-195 DEG C., acetylated in an acetic bath made up of water, sulfuric acid, sodium sulphate and aldehydes Formica, at a temperature of 90 ° C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| RO129118A RO97076B1 (en) | 1987-07-20 | 1987-07-20 | Polyvinyl alcohol fibre and process for producing the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| RO129118A RO97076B1 (en) | 1987-07-20 | 1987-07-20 | Polyvinyl alcohol fibre and process for producing the same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| RO97076B1 true RO97076B1 (en) | 1989-07-03 |
Family
ID=40905392
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| RO129118A RO97076B1 (en) | 1987-07-20 | 1987-07-20 | Polyvinyl alcohol fibre and process for producing the same |
Country Status (1)
| Country | Link |
|---|---|
| RO (1) | RO97076B1 (en) |
-
1987
- 1987-07-20 RO RO129118A patent/RO97076B1/en unknown
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