公开(公告)号：US20240360524A1

公开(公告)日：2024-10-31

申请号：US18771260

申请日：2024-07-12

Applicant: ECCO Sko A/S

Inventor： Thomas Gogsig ,  Ilona Francisca Maria Coremans ,  Stojanka Petrusic

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

CPC classification number: C14C15/00 ,  D06P1/94 ,  D06P3/3286

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：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：US12049676B2

公开(公告)日：2024-07-30

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: C14C3/00 ,  C14C15/00 ,  D06P1/94 ,  D06P3/32

CPC classification number: C14C15/00 ,  D06P1/94 ,  D06P3/3286

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：US20240052437A1

公开(公告)日：2024-02-15

申请号：US18267069

申请日：2021-12-14

Applicant: ECCO Sko A/S

Inventor： Thomas Gogsig ,  Panagiotis Mytaros ,  Thomas Gregor ,  Ilona Francisca Maria Coremans

IPC: C14C3/06 ,  C14C15/00

CPC classification number: C14C3/06 ,  C14C15/00

Abstract: A tanning process for tanning of animal hides in a process equipment including a tanning container, a controller, and temperature regulating equipment. The controller controls the temperature in the tanning container based on a temperature setpoint input to or established by the controller. The tanning process includes the steps of initially determining process parameters based on animal hide characteristics including at least animal hide type and animal hide weight. The process parameters include at least one of the parameters: time, temperature, start pH and end pH or any combination thereof. The tanning process of the animals hides is executed based on the process parameters in the tanning container under atmospheric pressure. The tanning process involves the addition of tanning agents to animal hides in the tanning container. The tanning involves the addition of water in an amount of less than 10% bw of the animal hides.