DEVELOPMENT RESEARCH FOR AN ACRYLIC CONTINUOUS FILAMENT
| Autor: | Eiji Osawa, Kazuo Koyano, Seiichi Inoue |
|---|---|
| Rok vydání: | 1966 |
| Předmět: | |
| Zdroj: | Sen'i Gakkaishi. 22:484-491 |
| ISSN: | 1884-2259 0037-9875 |
| DOI: | 10.2115/fiber.22.484 |
| Popis: | Using the acrylic continuous filaments prepared by the dry spinning process as described in the previous report (I), cantilever drawing and drawing in steam and by a hot plate were done. Some physical properties of the drawn filaments were measured, also taffeta was woven of the drawn filaments. The acrylic continuous filaments were compared with other kinds of filaments. It has been found that:1. In the stress-strain curves of the cantilever drawing, the region in which drawing tension remains constant is relatively narrow. So, the drawing must be uniform, and the non-uniform drawing accompanied by necking hardly occurs. The tension of drawing under usual condition is lower than those for polyamide and poly (ethylene terephthalate) by one order, and nearly equal to that for poly (vinyl chloride). It is considered that the drawing behavior of polyacrylonitrile is characteristic of atactic vinyl polymers.2. It is possible to draw acrylic continuous filaments in steam at the high speed of 600m/min, but at the speed of only 100m/min by a hot plate. It is practically impossible to draw by means of a hot pin.3. The filament drawn in steam has higher strength and lower elongation. It is a high orientation type, having higher value of shrinkage in boiling water, lower velocity of dyeing and lower number of twist. On the other hand, the filament drawn by a hot plate has lower strength and higher elongation. It is a low orientation type, having the same velocity of dyeing as that of the staple fibre. Although in the drawing by a hot plate both the temperature of heat treatment and the contraction during heat treatment are much larger than those of drawing in steam, the shrinkage in boiling water still survives, indicating poorness of heat-setting property. It may be considered that the poorness of heat-setting property is the characteristic of atactic vinyl polymers.4. The stress-strain curve of the drawn acrylic continuous filament lies between those of poly (ethylene terephthalate), nylon and rayon, acetate.5. Compared with taffetas woven of various filaments, the taffeta of acrylic continuous filament is situated between poly (ethylene terephthalate), nylon and rayon, acetate in strengths and wash and wear property. However, it is distinctively the most excellent in touch and the silkiest of these man-made filaments. In addition to this, crepes are easily woven of acrylic hard twist continuous filament yarn. This is the property poly (ethylene terephthalate) filament does not have Further, dyed with cationic dye, acrylic filament is superior to poly (ethylene terephthalate) and nylon filament in brightness of color.conclusion: Acrylic continuous filament is the most aesthetical synthetic fibre. |
| Databáze: | OpenAIRE |
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