PURPOSE: To obtain the titled ultrafine fiber having flexibility and high strength, by performing a composite spinning of two or more components using a mixture of a tetrafluoroethylene resin and a polymeric material as a component, drawing the spun fiber and sintering the tetrafluoroethylene resin.
CONSTITUTION: Fine powder of tetrafluoroethylene resin is mixed with a polymeric substance such as cellulose, alginic acid, etc., and the obtained mixture is used as a component for a composite spinning process using a polymeric substance as another component. The fine particles of the tetrafluoroethylene resin in the spun fiber are sintered at 300W420°C and the fiber is drawn at 300W360°C or drawn in cold state and then drawn at the above temperature. The objective ultrafine fiber having a fineness of ≤1.0 de, a tenacity of ≥0.5g/d and an elongation of ≥10% can be produced by removing the substances other than the tetrafluoroethylene resin from the drawn yarn e.g. by thermal decomposition.
UMEZAWA MASAO
IMAI SHIRO
| JPS59187615A | 1984-10-24 | |||
| JPS59216915A | 1984-12-07 | |||
| JPS4740571A | ||||
| JP45030049A |