ANNULAR COOLING APPARATUS FOR SPINNING AND MELT-SPINNING METHOD

PROBLEM TO BE SOLVED: To provide an annular cooling apparatus for spinning, having excellent air flow uniformity in the circumferential direction, and free from the trouble of the contact and fusion of yarns by the oscillation of the yarn in the production of a multifilament yarn to give a yarn having high quality. SOLUTION: The annular cooling apparatus for spinning cools and solidifies a yarn formed by the melt-spinning of a thermoplastic polymer by blasting air flow to the yarn from the outside to the inside of the running path of the yarn. The apparatus is provided with an air-flow introducing pipe 20, a first buffer chamber 13 connected to the air-flow introducing pipe 20 and having an annular flow channel, an annular straightening member 11 positioned at the downstream of the annular flow channel of the first buffer chamber 13, a second buffer chamber 12 provided with an annular flow channel, having a cross-sectional area of the flow channel larger than that of the first buffer channel and positioned at the downstream side of the annular straightening member 11, and an annular straightening filter 5 placed inside of the second buffer chamber 12 and having a flow channel to blast air flow inward. COPYRIGHT: (C)2009,JPO&INPIT