339results about "Leather manufacturing" patented technology

A punch includes a jig having four punching regions, each punching region having a pattern hole and a concave embossment; guide columns extended upward from a border of the punching regions on the jig; a base for fixing the jig; a punching member punching and embossing the rectangular corner of a sheet member with vertically moving against the jig by guidance of the guide columns; and an elastic body to elastically bias the punching member upward.

The present invention relates to an eco-friendly beam house process for de-hairing of leather using commercially available enzymes that obviates the use of lime and other alkalis. The present invention also provides an alternate process for opening the fibers of leather using commercially available enzymes. The present invention further provides a three-step process for tanning hide or skin in a narrow pH range of from about 7.5 to about 8.5.

The invention relates to a processing method of leather, in particular to the processing method of full grain or light corrected vamp leather, soft vamp leather, matte vamp leather, suede vamp leather and cowhide seawater-proof vamp leather of bag leather and belt leather. The processing of the leather is completed by treatment before tanning, tanning method, resin re-tanning, stuffing and dying method, chromium fixation, and varnishing method. The leather processed by adopting the processing method of the seawater-proof vamp leather is plump and soft, the leather surface is compact and not loose, the physical and mechanical strength is in line with the requirements of the vamp leather, the seawater-proof performance is good, and the range of applications is wide.

The production process of surgical absorbable hemostatic sponge made of animal hide incldues the following main procedures: 1. soaking animal hide chips in Ca(OH)2 aqueous solution; 2. washing expanded high material with water with pH=6.5-8, then soaking the above-mentioned material in liquid mixture of HCL and H2SO4; 3. neutralizing the soaking liquor to make its pH value be 6.5 and stirring to obtain neutral hide materia; 4. washing the neutral hide material with water and pickling to form colloidal hide material; 5. neutralizing soaking liquor and stirring; 6. cooking colloidal hide material to obtain dilute liquid gelatin; 7. vacuum adsorption and filtering to obtain pure clean dilute gelatin liquor; 8. vacuum concentration; 9. foaming under the vacuum condition; 10. using high-pressure cold air to blow said foamed gelatin liquor to obtain spongy material.

The invention relates to an improved method and apparatus for the treatment of animal skin substrates which employs a multiplicity of solid particles. There is disclosed an apparatus for treating one or more animal skin substrates with a multiplicity of solid particles and treatment liquor comprising: a rotatably mounted drum comprising an internal volume having a first portion defining a treatment volume for retaining said animal substrates and a second portion defining a collecting volume; one or more inlets for introducing solid particles and treatment liquor into said treatment volume; a partition separating said treatment volume from said collecting volume wherein said partition allows free passage of solid particles from the treatment volume to the collecting volume and prevents the passage of the substrates therethrough; a circulation path for conveying said solid particles from the collecting volume to the treatment volume; and a pumping device arranged to pump solid particles and said treatment liquor along a portion of said circulation path.

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.

An apparatus and method for a water removing roller device for removing excess water from the hide of a cattle, which uses pliable urethane roller stacks that can be attached by an arm structure. The roller structure can be mounted on a hinge to an arm thereby allowing the structure to swivel. The arm can be attached to a stationery device with a hinge, which is also allowed to swivel. A tension device, for example, a spring or a hydraulic cylinder can be attached to the back of the arm and connected to the stationery device to provide enough tension on the structure to keep the rollers in contact with the cattle hide, thereby pressing out the water allowing it to run off prior the blood plasma saving section.

A method for tanning an animal substrate comprising the steps: i) agitating the animal substrate with a chromium-free tanning agent; and ii) agitating the animal substrate with a tanning agent having an oxazolidine group; wherein at least some of the agitation is performed in the presence of a solid particulate material having an average particle size of from 1 to 500 mm.

The invention relates to the technical field of leather processing and provides a preparation process of bovine blue wet leather with a large leather area, broad growth patterns, great comprehensive performance and small environmental pollution. The bovine blue wet leather prepared by the preparation process of the bovine blue wet leather is large in width, broad in pattern, compact and fine in grain surfaces, consistent in color, uniform in thickness, soft, plump and elastic in leather body and high in physical strength. Moreover, the production process flow is simple and easy to implement, and the production cost is proper; in an implementation process, recycling of wastewater, preservation and removal of hair with less ash and sulfur, ammonia-free deashing and softening, salt-free pickling chrome tanning and other clean production technologies are also adopted. The water for tanning can be saved, the pollution of tanning is obviously reduced, the pollution disposal cost is lowered,considerable benefits of energy conservation and emission reduction are provided, and the preparation process is suitable for industrial production and use. The preparation process of the bovine bluewet leather specifically comprises the following steps of batching of bovine raw material leather, soaking in water, hair removal and expansion, beef removal, splitting, ash removal and softening, pretreatment, dewatering and peeling, soaking in acid and tanning with chrome and washing with water and discharging.