摘要:
The present invention relates to a method for the processing of hides or skins into leather, comprising enzymatic treatment of the hide or skin with carbohydrase in the soaking step. The present invention can achieve optimal fiber opening results in a relatively short period of time and at the same time does not cause loose grain, and meanwhile the pollution or impact on the environment is reduced in a maximum way.
摘要:
Methods and systems for processing raw animal hides into leather are provided. In particular, one or more embodiments comprise a tanning manager that directs the routing of hides to a plurality of tanning drums. This allows the tanning manager to efficiently use the capacity of the plurality of tanning drums and provides improved consistency in the tanning of the hides. Furthermore, one or more embodiments enable the tanning manager to route hides to tanning drums based on various factors, such as hide type, hide weight, and hide size. In addition, one or more embodiments provide the tanning manager with greater control over the processing of hides into leather by customizing the tanning recipes applied to each batch of hides.
摘要:
Tanned leather, skin or pelt is produced by non-metal tanning, comprising the step of tanning a bated hide, skin or pelt with a tanning agent (A), the tanning agent (A) being at least a mixture of compounds of formula (I) and formula (II), wherein Hal signifies fluorine or chlorine, R1 signifies hydrogen, C1-8-alkyl or an alkyleneoxy radical of formula (III), —(—C2-3 alkylene-O—)q—H (III) R2 signifies a) phenyl, mono- or di-substituted with SO3M or COOM and optionally substituted also with hydroxyl or C1-4-alkyl or C1-4-alkoxy, or b) naphthyl, mono- or di- or tri-substituted with SO3M and optionally substituted also with hydroxyl, or c) C1-8-alkylene, substituted with (SO3M) or (COOM), or d) a radical of formula (IV), —(—C2-3 alkylene-O—)p—Y (IV) e) or a radical of formula (IVa), —(C2-3 alkylene-O)p—C2-3 alkylene-SO2CH2CH2O—Y (IVa) m signifies 1 or 2, p signifies 0 or 1, Y signifies hydrogen or —SO3M, q is of from 1 to 10, M signifies hydrogen or an alkali metal cation or an ammonium cation, the ammonium cation being a protonated tertiary amine or a quaternary ammonium cation, R3 signifies hydrogen or chlorine, in a tanning bath, the tanning bath having a pH of from 6 to 10 at the beginning of tanning step.
摘要:
Tanned leather, skin or pelt is produced by non-metal tanning, comprising the step of tanning a bated hide, skin or pelt with a tanning agent (A), the tanning agent (A) being at least one compound of formula (I), wherein X signifies fluorine or chlorine, and/or (+NR3)0-1, wherein R is a substituted C1 to C6 alkyl group or an unsubstituted C1 to C6 alkyl group, an unsubstituted C6 to C10 aryl group or a substituted C6 to C10 aryl group or a C5 to C6 heteroaryl group. R1 signifies hydrogen, C1-8-alkyl or an alkyleneoxy radical of formula (Ia), —(—C2-3 alkylene—O—)q—H (Ia) R2 signifies hydrogen, hydroxy, C1-4-alkyl or C1-4-alkoxy, m signifies 1 or 2, n signifies 0 to 2, q is of from 1 to 10, M signifies hydrogen or an alkali metal cation or an ammonium cation, the ammonium cation being a protonated tertiary amine or a quaternary ammonium cation, in a tanning bath, the tanning bath having a pH of from 6 to 10 at the beginning of tanning step, wherein the bated hide or skin or pelt is subjected to tanning with (A) without previous pickling.
摘要:
The present invention relates to water-soluble, acid-groups-containing graft copolymers which are at least partially biodegradable and are based on sugars and monoethylenically unsaturated carboxylic acids, sulfonic acids and/or phosphonic acids or the salts of said acids as well as optional further monomers. The present invention further relates to a process for producing the graft copolymers at temperatures of up to 200.degree. C. by means of radical polymerization initiators, in that a total mixture of 5-60%-wt. mono-, di- and oligosaccharides, the derivatives thereof or the mixtures thereof, and 95-40%-wt. of a monomer mixture comprising at least one monoethylenically unsaturated carboxylic acid, at least one monoethylenically unsaturated sulfonic acid, one monoethylenically unsaturated sulfuric acid ester and/or vinylphosphonic acid or the salts of said acids with monovalent cations, as well as optional further monomers is polymerized. The present invention further relates to the use of the graft copolymers in aqueous systems, for binding multivalent metal ions, inhibiting the water hardness, as additive in detergents and cleaning agents, as textile auxiliary, dispersing agent, in particular for pigments, and as auxiliary agent in the production of paper and leather.
摘要:
Wet leather treating compositions and methods of wet treating leather hides employing alkylpolyglycosides for enhancing the penetration and absorption of the leather treatment formulations in an environmentally safe manner. The compositions are substantially free of volatile organic compounds.
摘要:
Tanning and pickling of leather and fur skins are conducted at selected water content ranges (50-80 weight percent for leather, 30-80 for skin) established by partial water removal; in water-immiscible organic solvent media, preferrably halogenated hydrocarbons, to produce end products (after such further finishing steps as post-tanning, dyeing, fatliquoring and coating) which are equal to or better in quality than products tanned conventionally in aqueous media while avoiding the pollution or pollution-related economic problems of aqueous media.
摘要:
Methods and systems for processing raw animal hides into leather are provided. In particular, one or more embodiments comprise a tanning manager that directs the routing of hides to a plurality of tanning drums. This allows the tanning manager to efficiently use the capacity of the plurality of tanning drums and provides improved consistency in the tanning of the hides. Furthermore, one or more embodiments enable the tanning manager to route hides to tanning drums based on various factors, such as hide type, hide weight, and hide size. In addition, one or more embodiments provide the tanning manager with greater control over the processing of hides into leather by customizing the tanning recipes applied to each batch of hides.