Abrégé

Method (1) for metal-free tanning of a quantity of hide having initial weight (w), said quantity of hide being contained in a drum, wherein said method (1) comprises at least one tanning treatment (B) of said hide including at least the following operating steps: B.1 feeding aliphatic aldehyde into said drum, in a percentage ranging between about 1% and 3% by weight with respect to the initial weight (w) of said hide, optionally equal to about 2% by weight, and B.2 moving said drum for a time period of at least about 10 min, optionally approximately 20 min at an operating speed between 1 and 8 revolutions/minute, preferably comprised between 4 and 5 revolutions/minute; B.3 feeding citric acid into said drum, in a percentage ranging between about 0.1% and 0.3% by weight with respect to the initial weight (w) of said hide, optionally equal to about 0.2% by weight, and B.4 moving said drum for a time period of at least about other 10 min, optionally approximately 20 min at said operating speed; B.5 feeding aliphatic aldehyde into said drum, in a percentage ranging between about 1% and about 3% by weight with respect to the initial weight (w) of said hide, optionally equal to about 2% by weight, and B.6 moving said drum for a time period of at least about 150 min, optionally approximately 180 min at said operating speed; B.7 feeding sodium formate into said drum, in a percentage ranging between about 0.3% and about 0.7% by weight with respect to the initial weight (w) of said hide, optionally equal to about 0.5% by weight, and B.8 moving said drum for a time period of at least about 20 min, optionally approximately 30 min at said operating speed; B.9 feeding magnesium oxide into said drum, in a percentage ranging between about 0.3% and about 0.7% by weight with respect to the initial weight (w) of said hide, optionally equal to about 0.5% by weight, and B.10 moving said drum for a time period of at least about 60 min, optionally approximately 90 min at said operating speed; B.11 feeding water into said drum, at a temperature ranging between about 30° C. and about 60° C., optionally equal to about 50° C., in a percentage ranging between about 30% and 50% by weight with respect to the initial weight (w) of said hide, optionally equal to about 40% by weight, and B.12 moving said drum for a time period of at least about 100 min, optionally approximately 120 min at said operating speed; B.13 feeding aliphatic aldehyde into said drum, in a percentage ranging between about 1% and 5% by weight with respect to the initial weight (w) of said hide, optionally equal to about 3% by weight, and B.14 moving said drum for a time period of at least about 100 min, optionally approximately 120 min at said operating speed; and then B.15 moving said drum for a maintaining period comprised between about 10 and about 16 hours, optionally approximately 14 hours, at a first maintaining speed ranging between about 1 and 5 revolutions/hour, optionally comprised between 2 and 4 revolutions/hour, even more optionally equal to about 3 revolutions/hour.

Classes IPC  ?

• C14C 3/16 - Tannage chimique par agents organiques au moyen d'aldéhydes aliphatiques
• C14C 3/28 - Procédés à stades multiples
• C14C 1/08 - Élimination de la chauxFoulageMise en juséeDégraissage
• C14C 3/30 - Tannage chimique par des moyens physiques combinés avec des moyens chimiques
• D06P 3/32 - Cuir

Abrégé

Method (1) for metal-free tanning of a quantity of hide having initial weight (w), said quantity of hide being contained in a drum, wherein said method (1) comprises at least one tanning treatment (B) of said hide including at least the following operating steps: B.1 feeding aliphatic aldehyde into said drum, in a percentage ranging between about 1% and 3% by weight with respect to the initial weight (w) of said hide, optionally equal to about 2% by weight, and B.2 moving said drum for a time period of at least about 10 min, optionally approximately 20 min at an operating speed between 1 and 8 revolutions/minute, preferably comprised between 4 and 5 revolutions/minute; B.3 feeding citric acid into said drum, in a percentage ranging between about 0.1% and 0.3% by weight with respect to the initial weight (w) of said hide, optionally equal to about 0.2% by weight, and B.4 moving said drum for a time period of at least about other 10 min, optionally approximately 20 min at said operating speed; B.5 feeding aliphatic aldehyde into said drum, in a percentage ranging between about 1% and about 3% by weight with respect to the initial weight (w) of said hide, optionally equal to about 2% by weight, and B.6 moving said drum for a time period of at least about 150 min, optionally approximately 180 min at said operating speed; B.7 feeding sodium formate into said drum, in a percentage ranging between about 0.3% and about 0.7% by weight with respect to the initial weight (w) of said hide, optionally equal to about 0.5% by weight, and B.8 moving said drum for a time period of at least about 20 min, optionally approximately 30 min at said operating speed; B.9 feeding magnesium oxide into said drum, in a percentage ranging between about 0.3% and about 0.7% by weight with respect to the initial weight (w) of said hide, optionally equal to about 0.5% by weight, and B.10 moving said drum for a time period of at least about 60 min, optionally approximately 90 min at said operating speed; B.11 feeding water into said drum, at a temperature ranging between about 30°C and about 60°C, optionally equal to about 50°C, in a percentage ranging between about 30% and 50% by weight with respect to the initial weight (w) of said hide, optionally equal to about 40% by weight, and B.12 moving said drum for a time period of at least about 100 min, optionally approximately 120 min at said operating speed; B.13 feeding aliphatic aldehyde into said drum, in a percentage ranging between about 1% and 5% by weight with respect to the initial weight (w) of said hide, optionally equal to about 3% by weight, and B.14 moving said drum for a time period of at least about 100 min, optionally approximately 120 min at said operating speed; and then B.15 moving said drum for a maintaining period comprised between about 10 and about 16 hours, optionally approximately 14 hours, at a first maintaining speed ranging between about 1 and 5 revolutions/hour, optionally comprised between 2 and 4 revolutions/hour, even more optionally equal to about 3 revolutions/hour.

Classes IPC  ?

• C14C 3/16 - Tannage chimique par agents organiques au moyen d'aldéhydes aliphatiques
• C14C 3/28 - Procédés à stades multiples
• C14C 1/08 - Élimination de la chauxFoulageMise en juséeDégraissage
• C14C 3/10 - Tannage avec un agent végétal
• D06P 3/32 - Cuir

Produits et services

Animal skins and hides; Leather and imitation leather

Produits et services

Studs of leather; Reins for guiding children; Straps for soldiers' equipment; Kid; Leatherboard; Cases of leather or leatherboard; Girths of leather; Shoulder belts [straps] of leather; Straps made of imitation leather; Leather luggage straps; Shoulder straps; Leather laces; Leather straps; Straps for skates; Leather, unworked or semi-worked; Leather for harnesses; Leather for shoes; Card holders made of imitation leather; Card holders made of leather; Labels of leather; Leather twist; Moleskin [imitation of leather]; Sheets of imitation leather for use in manufacture; Sheets of leather for use in manufacture; Casings, of leather, for springs; Trimmings of leather for furniture; Harness fittings; Imitation leather; Chin straps, of leather; Rawhide chews for dogs; Worked or semi-worked hides and other leather; Leather and imitations of leather; Polyurethane leather; Leather for furniture; Leather sold in bulk; Animal skins; Cattle skins; Curried skins; Chamois leather, other than for cleaning purposes; Fur; Furs sold in bulk; Faux fur; Semi-worked fur; Goldbeaters' skin; Document cases of leather; Industrial packaging containers of leather; Furniture coverings of leather; Boxes of leather or leatherboard; Boxes made of leather; Imitation leather hat boxes; Butts [parts of hides]; Imitation leather sold in bulk; Tefillin [phylacteries]; Leather cloth; Shoulder belts; Valves of leather; Luggage, bags, wallets and other carriers; Saddlery, whips and apparel for animals. Clothing; Footwear; Headgear.

Produits et services

Leather and imitation leather, animal skins and hides.

Produits et services

Leather and imitations of leather, animal skins and hides.