16 results about "Tanning tanning" patented technology

The present invention discloses a soaking device for leather modification based on chemical process in the field of leather processing technology, comprising a tanning barrel for soaking leather, a lifting assembly for conveying the leather into the tanning barrel being arranged above the tanning barrel, and a plurality of fixing assemblies distributed in a circular shape and at equal intervals being arranged at the bottom of the lifting assembly. The present invention adopts the fixing assembly, clamps the leather at both ends, and stretches the leather from the middle section so that the leather is fixed and stretched and laid. In a vertical manner, the height of the support block gradually rises, so that the animal skin is gradually stretched and extended; in the horizontal direction, the support blocks on both sides are stretched by the rod body to slide toward the two ends of the support rod, so that the animal skin is also gradually stretched and extended in the horizontal direction, so that the leather can fully contact with the tanning agent during the tanning process, thereby improving the tanning treatment effect on the leather.

Methods and systems for sorting hides are provided. In particular, one or more embodiments comprise a tanning control system that enhances the traceability of hides by capturing and utilizing data related to the unloading, tanning, sorting, and packaging of hides. Furthermore, one or more embodiments enable the tanning control system to improve efficiency by sorting hides based, at least in part, on data generated during prior tanning processes. Additionally, one or more embodiments facilitate the tanning control system in customizing the sorting and packaging of hides based, at least in part, on one or more hide characteristics and / or customer specifications.

The present application belongs to the field of leather industry production, and particularly relates to a method for high absorption chrome tanning by using cross-linking enzyme preparation. The method comprises the following steps: water immersion, unhairing and liming, deliming, softening, enzyme-assisted tanning, and acid immersion tanning. The enzyme-assisted tanning is assisted by using cross-linking enzyme preparation. The cross-linking enzyme preparation is not used in combination with the hydrolytic enzyme in the softening step. The cross-linking enzyme comprises glutamine transaminase (TG enzyme). The comprehensive activity of the cross-linking enzyme is controlled to be 1-30 U / ml in the application process, and the activity of the TG enzyme is controlled to be 1-20 U / ml. The process in the present application meets the environmental protection requirements. Firstly, the tanning agent absorption rate in the tanning process is successfully improved, and the waste discharge amount in the tanning process is reduced. Secondly, the cleaner cross-linking enzyme preparation is successfully used to replace the chemical auxiliary agent to improve the tanning agent absorption rate. Thirdly, the process operation is simplified.

The present invention relates to a method for antimicrobial protection applied to hides in the tanning process incorporating a biocidal composition and an additive allowing the Identification of its presence by means of a luminescent effect, as well as certifying its originality using luminescence encryption techniques, wherein the composition is added in the tanning process immediately after adding the chromium or titanium salts and in an amount between 0.1 % and 5 % by weight of the material to be tanned and comprises: silver phosphate glass between 3 % and 5 %; silicone in an amount between 1 % and 3.5 %; aliphatic hydrocarbons between 0.1 % and 0.30 %; and water between 90 % and 95 %, and the luminescent additive is added in an amount between 0.1 % and 5 % by weight of the material to be tanned and comprises between 20 % and 40 % silica; alumina in a proportion between 10 % and 30 %; calcium fluoride between 30 % and 50 %; erbium (III) fluoride between 0.5 % and 3 %; ytterbium (III) fluoride between 5 % and 15 %; thulium (III) fluoride in a maximum amount of 5 %; and europium (III) fluoride in a maximum amount of 5 %, with respect to the total weight of the luminescent additive.

The invention belongs to the technical field of leather tanning, and discloses a salt-free and chrome-free tanning method. According to the method, softened pelt serves as a raw material, bio-based dialdehyde carboxylic acid pre-tanning, salt-free pickling and ferric salt tanning are sequentially carried out, and the environment-friendly and efficient tanning process is achieved. Wherein the adding amount of the bio-based dialdehyde carboxylic acid is 1wt%-5wt% of the weight of the bare skin, and the adding amount of the ferric salt is 5wt%-30wt%. The dialdehyde group in the bio-based dialdehyde carboxylic acid can be used for pre-tanning and softening the pelt, closing the amino group and cross-linking the collagen, so that acid swelling is effectively prevented, and salt-free pickling is realized; the carboxyl group provides an additional binding site for the iron tanning agent, a firm cross-linked network is formed, and the tanning performance is enhanced. In addition, the bio-based dialdehyde carboxylic acid can scavenge free radicals and fix Fe < 3 + >, and deterioration and deterioration in the leather storage process are avoided. The method is ecological and environment-friendly, excellent in tanning property and good in storage stability of the tanned leather, and strong technical support is provided for clean transformation of the leather industry.

The invention discloses soaking equipment for leather modification based on chemical process treatment, and belongs to the technical field of leather processing. The soaking equipment comprises a tanning barrel for soaking leather, and a hoisting assembly for conveying the leather into the tanning barrel is arranged above the tanning barrel; a plurality of fixing assemblies which are annularly distributed at equal intervals are arranged at the bottom of the hoisting assembly, leather is fixed and laid in an extending mode by adopting the fixing assemblies, clamping at the two ends and the effect of stretching the leather from the middle section, in a vertical mode, the height of a supporting block is gradually increased, and animal leather is gradually stretched and extended; in the horizontal direction, the supporting blocks on the two sides are stretched by the second rod bodies to slide towards the two ends of the supporting rods, so that the animal skin is gradually stretched and extended in the horizontal direction, the leather can make full contact with a tanning agent in the tanning process, and the tanning treatment effect on the leather is improved.

This invention relates to the field of leather processing technology and discloses a tanning process for all-vegetable tanned cowhide floor leather, comprising the following steps: pre-treating raw hides followed by acid immersion pre-tanning, tanning, intermediate treatment, retanning, and post-treatment to obtain finished leather; a first pre-tanning agent is added during the acid immersion pre-tanning process; the tanning process includes the following steps: adding water and the first tanning agent to a groove and rotating; adding a second tanning agent and rotating; adding a third tanning agent and rotating; adding a fourth tanning agent and rotating; adding a fifth tanning agent and rotating; then transferring to a drum, adding water and a sixth tanning agent and rotating; adding a seventh tanning agent and rotating; the retanning process includes the addition of a first retanning agent and a second retanning agent. This invention uses a combination of groove immersion and drum tanning, which greatly shortens the tanning time, reduces the floor space required, and saves labor costs.

The invention relates to a method for tanning hide without using chromium as a tanning agent, which uses a nanometric tanning additive and which enables reduced usage, as well as improved quality, of processing water used during the hide tanning process in comparison with tanning using chromium.

The present invention relates to a method for antimicrobial protection applied to hides in the tanning process incorporating a biocidal composition and an additive allowing the Identification of its presence by means of a luminescent effect, as well as certifying its originality using luminescence encryption techniques, wherein the composition is added in the tanning process immediately after adding the chromium or titanium salts and in an amount between 0.1 % and 5 % by weight of the material to be tanned and comprises: silver phosphate glass between 3 % and 5 %; silicone in an amount between 1 % and 3.5 %; aliphatic hydrocarbons between 0.1 % and 0.30 %; and water between 90 % and 95 %, and the luminescent additive is added in an amount between 0.1 % and 5 % by weight of the material to be tanned and comprises between 20 % and 40 % silica; alumina in a proportion between 10 % and 30 %; calcium fluoride between 30 % and 50 %; erbium (III) fluoride between 0.5 % and 3 %; ytterbium (III) fluoride between 5 % and 15 %; thulium (III) fluoride in a maximum amount of 5 %; and europium (III) fluoride in a maximum amount of 5 %, with respect to the total weight of the luminescent additive.

The present invention discloses a chrome-free tanning agent and a preparation method and application thereof. The chrome-free tanning agent comprises, by weight, 100 parts of starch, 40 to 100 parts of a saccharide modifier, 10 to 50 parts of an oxidant, 200 to 400 parts of a nano-silicon compound, and 50 to 100 parts of water. In the present invention, starch is degraded and oxidized to form a low-molecular polysaccharide containing carboxyl and aldehyde groups, and the polysaccharide molecules are bonded with the nano-silicon compound to form a stable organic-inorganic hybrid. The nano-hybrid of soft and hard molecules can easily penetrate into the leather during the tanning process, and the aldehyde and carboxyl groups carried can react with the amino groups of collagen in the skin. At the same time, the nano-silicon compound is bonded to the polysaccharide molecules, so that the leather can be given excellent fullness, firmness, softness and tear resistance.

The invention provides an ecological fur tanning method, and relates to the technical field of fur tanning. The ecological fur tanning method specifically comprises the following steps: S1, preparing raw materials; s2, soaking treatment; s3, biological degreasing; s4, carrying out softening treatment; s5, tanning with a bio-based epoxy active tanning agent; s6, tanning liquid management; s7, cleaning and drying; and S8, finishing and modifying. According to the method, the bio-based epoxy active tanning agent is adopted, use of tanning agents capable of releasing harmful substances such as formaldehyde and chromium in the traditional tanning process is avoided, greening of the tanning process is achieved, meanwhile, tanning waste liquid is prone to biochemical treatment, pollution to the environment is reduced, and the tanning agent capable of releasing the harmful substances is not used in the method, so that the tanning process is environmentally friendly. A terminal product does not contain harmful substances such as free formaldehyde or hexavalent chromium, the health and safety are improved, through biological degreasing and moderate enzyme softening in pretreatment, leather fibers are effectively dispersed, permeation and combination of a tanning agent are promoted, the tanning performance is enhanced, and the damp-heat-resistant stability of a leather plate is improved.

The application provides an organic silicon s-triazine derivative and a preparation method and application thereof, and belongs to the technical field of leather tanning agent development. The organic silicon s-triazine derivative is prepared from a s-triazine compound and organic silicon, and overcomes the problem of insufficient performance of the leather tanning agent in the prior art. The organic silicon s-triazine derivative can be crosslinked with skin collagen at multiple active sites, and good tanning effect is achieved. In the tanning process using the organic silicon s-triazine derivative, no harmful substances such as formaldehyde and heavy metal salts are involved, and environmental pollution is avoided. The product has strong tanning permeability, the tanned leather has a smooth and fine grain surface and excellent fullness, and is easy to be subjected to subsequent processing steps such as dyeing; and an environmentally-friendly and clean tanning method is provided for the leather-making industry.

The present invention belongs to the technical field of leather tanning, and discloses a salt-free and chromium-free tanning method. The method uses softened bare skin as raw material, and realizes an environmentally friendly and efficient tanning process by sequentially carrying out bio-based dialdehyde carboxylic acid pre-tanning, salt-free pickling and iron salt tanning. Among them, the amount of bio-based dialdehyde carboxylic acid added is 1wt%-5wt% of the weight of the bare skin, and the amount of iron salt added is 5wt%-30wt%. The dialdehyde group in the bio-based dialdehyde carboxylic acid can pre-tan and soften the bare skin, block the amino group and cross-link collagen, effectively prevent acid swelling, and realize salt-free pickling; its carboxyl group provides an additional binding site for the iron tanning agent, forming a strong cross-linking network and enhancing the tanning performance. In addition, the bio-based dialdehyde carboxylic acid can also scavenge free radicals and fix Fe 3+ , to avoid deterioration and deterioration of leather during storage. The present invention is not only environmentally friendly and has excellent tanning properties, but also has good storage stability for tanned leather, providing strong technical support for the clean transformation of the leather industry.

This utility model discloses a tanning device for preventing leather entanglement, relating to the field of leather production. It addresses the problems of existing tanning devices that use clamping grooves to fix the edges of leather to prevent entanglement, but this method is inefficient due to individual clamping. Furthermore, after tanning, the drum needs to be lifted and removed by a lifting device before the leather can be taken out, affecting tanning efficiency. The tanning drum has partition plates fixedly connected to both sides of its inner center. Multiple anti-entanglement columns are arrayed on the inner wall of the drum. A material loading / unloading opening is located at the center of the front face of the drum, and an arc-shaped sealing plate is rotatably connected to the outside of the opening. A receiving pool is fixedly connected to the upper surface of the support platform between two support frames. By setting the partition plates, the internal space of the tanning drum is divided into multiple independent chambers, effectively reducing the amount of leather accumulation. Combined with the physical barrier effect of the anti-entanglement columns, the probability of leather entanglement during the tanning process is significantly reduced.

A tanning process with recovery of water and chemical products comprising at least the steps of: - introducing one or more hides in a containment chamber thermally insulated from the outside, in which temperature, humidity and quantity of liquid inside are constantly monitored; - treating the hides, by feeding to containment chamber a treatment liquid in nebulized form selected from the group comprising water or a mixture thereof with one or more chemical products adapted to give to said hides the desired mechanical, physical and aesthetic properties; - extracting the hides from the containment chamber; characterized in that, subsequently to the step of treating the hides, said process comprises a rinsing procedure comprising at least the steps of: - discharging the treatment liquid not absorbed by the hides from the containment chamber; - accumulating the treatment liquid not absorbed by the hides in a collection tank; - rinsing the containment chamber by feeding a rinsing liquid selected from the group consisting of water or a mixture thereof with one or more detergent products; - discharging the contaminated rinsing liquid after use from the containment chamber; - accumulating the contaminated rinsing liquid after use in the collection tank; - treating the accumulated rinsing liquid in the collection tank in order to separate the water from the chemical products; - recovering the water and the chemicals products generated by the step of treating the liquid accumulated in the collection tank, in order that they can be at least partially reused in the same tanning process or in a subsequent tanning process.

The present invention discloses an additional antimicrobial protection step applied to leather in the post-tanning process which incorporates a biocide composition and an additive that allows its presence to be identified by means of a luminescent effect, in addition to certifying its authenticity using encryption techniques of the luminescence, wherein the composition is added in the tanning process immediately after the addition of chromium or titanium salts in an amount between 0.1% and 5% of the weight of the material to be tanned and comprises between 3% and 5% of silver phosphate glass; between 1% and 3.5% of silicone; between 0.1% and 0.30% of aliphatic hydrocarbons; between 90% and 95% of water, and the luminescent additive is added in an amount between 0.1% and 5% of the weight of the material to be tanned and comprises between 20% and 40% of silica; alumina in a proportion between 10% and 30%; between 30% and 50% of calcium fluoride; between 0.5% and 3% of erbium(III) fluoride; between 5% and 15% of ytterbium(III) fluoride; a maximum of 5% of thulium(III) fluoride; and a maximum of 5% of europium(III) fluoride, with respect to the total weight of the luminescent additive.