| 摘要 |
PURPOSE: A spinneret for a hollow fiber production is provided to improve the hollow rate, and to prevent the crush of a hollow unit by a drawing by making a slit form of the spinneret in an oval. CONSTITUTION: An oval shaped slit(1) and an oval shaped slit(2) of the spinning custody is faced each other in the left and the right sides; and a shows the inside diameter of slits(1)(2); a b shows the outside diameter of slits(1)(2); a c shows the length of the extended parts(1')(2') of slits(1)(2) added to escape the point of contact of slits; a d shows the interval of slits(1)(2); an e shows the thickness of slits(1)(2); when the c is 0, two slits are formed one perfect circle; the section of a hollow fiber formed according to grow large the value of the c is changed in an oval again by passing from the oval to a circle; when the value of the c is over the value of the a, each slit is formed a section of a 8 character type having two hollows. |
