GB1137857A - Improvements in making viscose rayon - Google Patents
Improvements in making viscose rayonInfo
- Publication number
- GB1137857A GB1137857A GB683266A GB683266A GB1137857A GB 1137857 A GB1137857 A GB 1137857A GB 683266 A GB683266 A GB 683266A GB 683266 A GB683266 A GB 683266A GB 1137857 A GB1137857 A GB 1137857A
- Authority
- GB
- United Kingdom
- Prior art keywords
- weight
- viscose
- stretched
- filaments
- bath
- 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
Links
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
- D01F2/06—Monocomponent artificial filaments or the like of cellulose or cellulose derivatives; Manufacture thereof from viscose
- D01F2/08—Composition of the spinning solution or the bath
- D01F2/10—Addition to the spinning solution or spinning bath of substances which exert their effect equally well in either
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Artificial Filaments (AREA)
Abstract
1,137,857. Making viscose rayon. RAYONIER Inc. 16 Feb., 1966 [20 July, 1965], No. 6832/66. Heading B5B. Viscose rayon filaments having an average conditioned tenacity of 4.3 to 6.5 g.p.d., a wet modulus of 1 to 2 g.p.d., a wet tenacity of 3 to 5 g.p.d., an elongation of from 8 to 12 per cent, and a solubility in aqueous 6.5% sodium hydroxide solution of less than 4.5%, which filaments have cross-sectional shapes which are mostly smoothly curved and have a protuberance on one side. They may be made by preparing a viscose from cellulose scanthate of 450 to 800 D.P., which viscose has a gamma number of 40 to 90, an NaCl salt index of 7 to 12 and contains a regeneration retarding modifier, extruding the viscose into a coagulating bath maintained at 18 to 30‹ C., which bath contains 3 to 9% by weight H 2 SO 4 , 7 to 18% of Na 2 SO 4 , 0.2 to 2% formaldehyde and 1 to 6% by weight of zinc sulphate. The coagulated filaments are stretched to such an extent that they are elongated by 110 to 250% . their length before being stretched, their stretching at this stage prior to their regeneration being at least 60% of the total stretch which they are to receive. Thereafter and while they are being completely regenerated in contact with a regenerating liquid at 60‹ to 100‹ C. they are stretched by at least an additional 30% in length, but by not more than 40% of the total stretch or beyond filament damage. The regenerating liquid is preferably a 0.5 to 5.0% by weight aqueous sulphuric acid solution. The modifier is preferably a mixture of dimethylamine and polyethylene glycol, preferably in the proportions of 1.0 to 30% by weight and 0.5 to 2.5% by weight respectively. The spin bath preferably contains formaldehyde and zinc sulphate (the proportion of the latter being expressed as the anhydrous salt) in the proportions shown in the shaded area of Fig. 1. The spin bath may contain 0.01 to 0.1% by weight of a surface active agent such as lauryl pyridinium chloride.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US47332165A | 1965-07-20 | 1965-07-20 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1137857A true GB1137857A (en) | 1968-12-27 |
Family
ID=23879081
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB683266A Expired GB1137857A (en) | 1965-07-20 | 1966-02-16 | Improvements in making viscose rayon |
Country Status (8)
| Country | Link |
|---|---|
| AT (1) | AT292180B (en) |
| BE (1) | BE676551A (en) |
| CH (1) | CH463011A (en) |
| ES (1) | ES324208A1 (en) |
| FI (1) | FI46267C (en) |
| GB (1) | GB1137857A (en) |
| NL (1) | NL6603601A (en) |
| SE (1) | SE337882B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3632468A (en) * | 1968-04-09 | 1972-01-04 | Rayonier Inc | High-crimp, high-strength rayon filaments and staple fibers and process for making same |
-
1966
- 1966-02-10 BE BE676551A patent/BE676551A/xx unknown
- 1966-02-11 SE SE178566A patent/SE337882B/xx unknown
- 1966-02-16 GB GB683266A patent/GB1137857A/en not_active Expired
- 1966-03-02 FI FI52866A patent/FI46267C/en active
- 1966-03-03 AT AT201266A patent/AT292180B/en not_active IP Right Cessation
- 1966-03-10 CH CH342066A patent/CH463011A/en unknown
- 1966-03-15 ES ES0324208A patent/ES324208A1/en not_active Expired
- 1966-03-18 NL NL6603601A patent/NL6603601A/xx unknown
Also Published As
| Publication number | Publication date |
|---|---|
| AT292180B (en) | 1971-08-10 |
| BE676551A (en) | 1966-08-16 |
| NL6603601A (en) | 1967-01-23 |
| SE337882B (en) | 1971-08-23 |
| CH463011A (en) | 1968-09-30 |
| FI46267C (en) | 1973-02-12 |
| ES324208A1 (en) | 1967-02-01 |
| FI46267B (en) | 1972-10-31 |
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