Abstract: Provided is an automatic calculation method for a surface defect area of a wet blue skin based on a DeeplabV3+ model, aiming at solving the problem that the automatic calculation of the surface defect area is difficult in a tannery. The method includes image data acquisition and preprocessing of a wet blue skin, training and verification of a wet blue skin surface defect segmentation model based on a DeeplabV3+ model, and automatic calculation of the surface defect area in a segmented image. The method can accurately segment common defects such as knife holes, brands and the like on the surface of a large-area wet blue skin, with a high speed of detecting a wet blue skin within 1 s.

Abstract: Provided are a flexible material based on resource utilization of waste finished leathers and waste fabrics and a preparation method thereof. The flexible material is prepared form raw materials including the following components in parts by weight: 50 parts to 70 parts of a waste rubber powder, 10 parts to 20 parts of a waste polyester nano-powder, 10 parts to 20 parts of a waste leather powder, and 8 parts to 12 parts of an epoxidized natural rubber (ENR) curing agent.

Abstract: Some embodiments of the disclosure provide methods for calculating carbon footprints of leather chemical materials. In some examples, the method includes: determining a calculation range of a carbon footprint of a leather chemical material in a life cycle as “cradle to gate”; determining a system boundary, a functional unit, and cut-off criteria for the carbon footprint of the leather chemical material in the life cycle; dividing the carbon footprint into a raw chemical obtaining process, a production process of the leather chemical material, and a waste disposal process within the system boundary; determining a carbon footprint calculation model for the leather chemical material according to resource consumption and environmental emission of each process; collecting and determining a quantity and a value required by each parameter in the carbon footprint calculation model; and calculating the carbon footprint of the leather chemical material using the carbon footprint calculation model.