公开(公告)号：EP1540052A1

公开(公告)日：2005-06-15

申请号：EP03749476.2

申请日：2003-09-05

Applicant: INVISTA Technologies S.à.r.l.

Inventor： STEELE, Ronald, E.

IPC: D01F6/60 ,  C08G69/06 ,  C08G69/30 ,  D01D4/04

CPC classification number: D01F6/60 ,  C08G69/06 ,  C08G69/30 ,  D01D4/04 ,  Y10T428/2929

Abstract: A process for making a synthetic melt spun polyamide filament in a solid phase polycondensation apparatus is disclosed. The flow rate of the purge (make-up) gas to the apparatus is increased, and the overall pressure in the apparatus is decreased, as compared to solid phase polycondensation apparatus of the prior art. As a result, the removal of the thermal degradation impurity from the polymer flake contributes to improving the yarn quality and at the same time, extends the spinneret wipe life.

公开(公告)号：EP1297201B1

公开(公告)日：2008-07-30

申请号：EP01948521.8

申请日：2001-06-20

Applicant: INVISTA Technologies S.à.r.l.

Inventor： BRADY, Bobby ,  GOSHORN, Elmer, L. ,  OVERTON, Frank, H. ,  STEELE, Ronald, E.

IPC: D01D4/00 ,  D01D4/04

CPC classification number: D01D4/00 ,  D01D4/04

Abstract: A spinneret steam blanketing system for blanketing the face of a spinneret with gas. The system includes a steam distribution ring (109) surrounding a filament array (122), where the steam distribution ring (109) abuts the spin head (112) and is removably mounted to said spin head (112). The steam distribution ring (109) is removed and the face (113) of the spinneret may be wiped clean, without the need for removing and replacing the spin pack (108).

公开(公告)号：EP1540052B1

公开(公告)日：2007-08-01

申请号：EP03749476.2

申请日：2003-09-05

Applicant: INVISTA Technologies S.à.r.l.

Inventor： STEELE, Ronald, E.

IPC: D01F6/60 ,  C08G69/06 ,  C08G69/30 ,  D01D4/04

CPC classification number: D01F6/60 ,  C08G69/06 ,  C08G69/30 ,  D01D4/04 ,  Y10T428/2929

Abstract: A process for making a synthetic melt spun polyamide filament in a solid phase polycondensation apparatus is disclosed. The flow rate of the purge (make-up) gas to the apparatus is increased, and the overall pressure in the apparatus is decreased, as compared to solid phase polycondensation apparatus of the prior art. As a result, the removal of the thermal degradation impurity from the polymer flake contributes to improving the yarn quality and at the same time, extends the spinneret wipe life.