公开(公告)号：US20220071355A1

公开(公告)日：2022-03-10

申请号：US17416775

申请日：2019-12-20

Applicant: ECCO Sko A/S

Inventor： Thomas GOGSIG ,  Stojanka PETRUSIC

IPC: A43B23/02 ,  D02G3/10 ,  A43B1/02 ,  D06P3/32

Abstract: A method of dyeing collagen fiber includes providing collagen fiber and dyeing the collagen fiber.

公开(公告)号：US20220220571A1

公开(公告)日：2022-07-14

申请号：US17607374

申请日：2020-04-29

Applicant: ECCO Sko A/S

Inventor： Thomas GOGSIG ,  Ilona Francisca Maria Coremans ,  Stojanka PETRUSIC

IPC: C14C15/00 ,  D06P1/94 ,  D06P3/32

Abstract: A method for dyeing and/or retanning of leather objects includes providing a leather object. The leather object has been processed by at least a tanning process. The leather object is introduced into a process chamber. The leather object is subjected in the process chamber to a pressurized fluid. The pressure of the pressurized fluid is controlled to reach a supercritical state. The leather object is subjected to a dyeing agent and/or a retanning agent, which dyeing or retanning agent is dissolved and/or transported in the pressurized fluid for at least a predefined period of time while the pressurized fluid is in the supercritical state. The pressure is reduced in the process chamber. The leather object is removed from the process chamber. The pressure reduction is controlled over time.

公开(公告)号：US20220220570A1

公开(公告)日：2022-07-14

申请号：US17607188

申请日：2020-04-29

Applicant: ECCO Sko A/S

Inventor： Thomas GOGSIG ,  Ilona Francisca Maria COREMANS ,  Stojanka PETRUSIC

IPC: C14C15/00 ,  D06P1/94 ,  D06P3/00

Abstract: An apparatus includes a process chamber, a controllable compressor for pressurizing a fluid, a pressure reducing member, an inlet for a processing agent and a controller. The process chamber is a pressure chamber. The controllable compressor pressurizes a fluid and introduces the pressurized fluid into the process chamber from a source. Further the controllable compressor controls a predefined pressure in the process chamber to reach a supercritical state of the fluid. An inlet for a processing agent facilitates introduction of the processing agent into the process chamber prior to, during, or subsequent to pressurization of the fluid. The pressure reducing member reduces the pressure of the fluid at least to reach a gaseous state subsequent to processing the leather object such that the time for reduction of pressure exceeds a predefined reduction period or the reduction of pressure does not exceed a predefined leather pressure reduction gradient.