GB1172619A - Polypivalolactone fibres of high resistance to stretch. - Google Patents
Polypivalolactone fibres of high resistance to stretch.Info
- Publication number
- GB1172619A GB1172619A GB55095/67A GB5509567A GB1172619A GB 1172619 A GB1172619 A GB 1172619A GB 55095/67 A GB55095/67 A GB 55095/67A GB 5509567 A GB5509567 A GB 5509567A GB 1172619 A GB1172619 A GB 1172619A
- Authority
- GB
- United Kingdom
- Prior art keywords
- polymer
- fibres
- filaments
- copolymer
- consist
- 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
- D01F6/00—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof
- D01F6/58—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolycondensation products
- D01F6/62—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolycondensation products from polyesters
- D01F6/625—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolycondensation products from polyesters derived from hydroxy-carboxylic acids, e.g. lactones
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
1,172,619. Polypivalolactone fibres of high stretch resistance. E. I. DU PONT DE NEMOURS & CO. 4 Dec., 1967 [5 Dec., 1966], No. 55095/67. Heading B5B. Fibres consisting of a polymer at least 70 mol. per cent of whose repeating units have the formula which fibres have an inherent viscosity of at least 0À75 as determined at a concentration of 0-5 gm. of polymer per 100 ml. of solution in trifluoroacetic acid at 30 C., an orientation angle not exceeding 17 degrees, an alpha ratio of less than 1-5, an alpha crystallite size transverse to the fibre axis of less than 125 and a radial breadth of at most 0-40 may be produced by subjecting oriented filaments of the polymer (the filaments having an inherent viscosity of at least 0-75 determined as above) to the following series of treatments: (a) heatsetting the filaments at a temperature of at least 135 for at least 3 seconds; (b) drawing the filaments at a draw ratio of at least 1-5 at a temperature of 120-190 C.; and (c) heating the filaments at a temperature of 160-200 C. If the polymer of which the filaments consist is a copolymer of pivalolactone and 2,2-diethylpropiolactone containing at least 10 mol. per cent of repeating units derived from the latter monomer, step (a) may be omitted. The filaments may consist of a copolymer of pivalolactone and 2-methyl-2-chloromethyl-propiolactone or pivalolactone and 2,2-di-n-propylpropiolactone. The expressions "orientation angle," " α crystallite size " and " radial breadth " are defined. Polypivalolactorie fibres produced according to Specification 766,347 are stated to require a load of only 1 gpd. or less to stretch them 7% after they have been boiled for half an hour in water under no tension and dried. The fibres of the present invention are stated to require a load of 1-5 to 4 gpd. and higher after the above treatment. The fibres of the invention may consist solely of the polymer specified or may consist of a copolymer of the polymer with another polymer consisting of different repeat units, the proportion of the other polymer being up to 30 mol. per cent of the copolymer.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US59917866A | 1966-12-05 | 1966-12-05 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1172619A true GB1172619A (en) | 1969-12-03 |
Family
ID=24398560
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB55095/67A Expired GB1172619A (en) | 1966-12-05 | 1967-12-04 | Polypivalolactone fibres of high resistance to stretch. |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US3776997A (en) |
| DE (1) | DE1669515A1 (en) |
| GB (1) | GB1172619A (en) |
| NL (1) | NL6716540A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5294395A (en) * | 1989-09-01 | 1994-03-15 | Ethicon, Inc. | Thermal treatment of theraplastic filaments for the preparation of surgical sutures |
| US5451461A (en) * | 1989-09-01 | 1995-09-19 | Ethicon, Inc. | Thermal treatment of thermoplastic filaments for the preparation of surgical sutures |
-
1966
- 1966-12-05 US US00599178A patent/US3776997A/en not_active Expired - Lifetime
-
1967
- 1967-12-04 GB GB55095/67A patent/GB1172619A/en not_active Expired
- 1967-12-05 NL NL6716540A patent/NL6716540A/xx unknown
- 1967-12-05 DE DE19671669515 patent/DE1669515A1/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| DE1669515A1 (en) | 1971-03-18 |
| DE1669515B2 (en) | 1975-12-18 |
| US3776997A (en) | 1973-12-04 |
| NL6716540A (en) | 1968-06-06 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed [section 19, patents act 1949] | ||
| PLNP | Patent lapsed through nonpayment of renewal fees |