GB762190A - Improved spinning process - Google Patents
Improved spinning processInfo
- Publication number
- GB762190A GB762190A GB3035753A GB3035753A GB762190A GB 762190 A GB762190 A GB 762190A GB 3035753 A GB3035753 A GB 3035753A GB 3035753 A GB3035753 A GB 3035753A GB 762190 A GB762190 A GB 762190A
- Authority
- GB
- United Kingdom
- Prior art keywords
- refringence
- light
- filaments
- nicol
- polarized
- 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
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D11/00—Other features of manufacture
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Textile Engineering (AREA)
- Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)
Abstract
<PICT:0762190/IV(a)/1> The uniformity of continuous filaments produced by spinning is tested by determining the bi-refringence of the filament and adjusting the spinning conditions to compensate for variation on bi-refringence. The invention is based on the fact that the tenacity of the drawn filaments is related to the bi-refringence. In the arrangement shown in Fig. 3, light from a mercury arc lamp 4, modulated at 100 cycles/sec passes through a red filter 5, is polarized by a Nicol prism 6 and falls on a filament 7 of polyethylene terephthalate at 45 DEG to the plane of polarization. The light then passes through a crossed Nicol and is received on an eleven-stage photo-multiplier 9 and recorded by an A.C. voltmeter 10. Under these conditions the output of the voltmeter representing the intensity of the transmitted light is a function of the bi-refringence. The Specification states that when the threads are made by forcing a melt through small orifices in a spinneret by a gear pump and leading away the filaments by a wind-up device the bi-refringence may be changed by altering the feed of the wind-up device. The gear pump must also be speeded up, however, to maintain the diameter of the thread contacts. In another method of detecting the changes of bi-refringence monochromatic sodium light is polarized by a Nicol prism. The polarized light is scattered by a scattering plate and after passing through a quarter-wave plate is analysed by a rotatable Nicol. The light emerging from the analyser is received on a light sensitive device and the analyser is rotated until the output of the device is a minimum. A ribbon of filaments of polyethylene tetraphthalate then replaces the scatter plate and the extinction angle of the analyzer is measured. A comparison of the two values indicates the bi-refringence of the threads. The light-sensitive device may be replaced by a microscope and the extinction position determined visually.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3035753A GB762190A (en) | 1953-11-03 | 1953-11-03 | Improved spinning process |
| ES0218108A ES218108A1 (en) | 1953-11-03 | 1954-10-28 | Improved spinning process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3035753A GB762190A (en) | 1953-11-03 | 1953-11-03 | Improved spinning process |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB762190A true GB762190A (en) | 1956-11-28 |
Family
ID=10306370
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3035753A Expired GB762190A (en) | 1953-11-03 | 1953-11-03 | Improved spinning process |
Country Status (2)
| Country | Link |
|---|---|
| ES (1) | ES218108A1 (en) |
| GB (1) | GB762190A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3317317A (en) * | 1963-01-02 | 1967-05-02 | Xerox Corp | Xerographic method of making a particle transparency projectable image |
| US3421820A (en) * | 1964-12-03 | 1969-01-14 | Monsanto Co | Optical determination of low luster in drawn nylon |
| US3466129A (en) * | 1965-05-31 | 1969-09-09 | Toyo Rika Kogyo Co Ltd | Polarizing microscope for identifying properties of fiber |
| GB2120382A (en) * | 1982-03-29 | 1983-11-30 | Xerox Corp | Optical detection using polarized light |
-
1953
- 1953-11-03 GB GB3035753A patent/GB762190A/en not_active Expired
-
1954
- 1954-10-28 ES ES0218108A patent/ES218108A1/en not_active Expired
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3317317A (en) * | 1963-01-02 | 1967-05-02 | Xerox Corp | Xerographic method of making a particle transparency projectable image |
| US3421820A (en) * | 1964-12-03 | 1969-01-14 | Monsanto Co | Optical determination of low luster in drawn nylon |
| US3466129A (en) * | 1965-05-31 | 1969-09-09 | Toyo Rika Kogyo Co Ltd | Polarizing microscope for identifying properties of fiber |
| GB2120382A (en) * | 1982-03-29 | 1983-11-30 | Xerox Corp | Optical detection using polarized light |
Also Published As
| Publication number | Publication date |
|---|---|
| ES218108A1 (en) | 1955-09-16 |
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