Poster
Abstract
Research summary supplied by the authors
To sustainably expand sales of leather products, recycling-oriented sustainable manufacturing and appealing superiority over competing materials are essential. In other words, we need to make more use of upcycling and reuse, so it is especially important to learn what kind of quality problems there are in aging products. While we are establishing quality standards at Japanese department stores, we are constantly in contact with product complaints. Product complaints are difficult to resolve individually and are often handled confidentially, but when aggregated into statistical data, they clearly reflect customer wishes and disappointments. Furthermore, by comparing competing materials in the same way, we would like to draw out the problems faced by leather products and their superiority over competing materials. In this survey, products that have been sold for more than 3 years are defined as aged products and compared with products that have been sold for less than 3 years (mostly less than 1 year). As a result, the composition ratio of synthetic, etc., has increased in aging products, while the composition ratio of leather has decreased. This reflects the fact that in hot and humid climates such as Asia, polyurethane is hydrolyzed, and its strength is likely to drop significantly. In addition, there were cases where stains occurred on the leather near the areas where the adhesive was used. From the above results, we have reached the following conclusions. synthetic products are not durable, so it is recommended to wear them as soon as possible rather than storing them for a long time. Since leather products are durable, they can be used for a long time by replacing consumables such as metal fittings and fasteners. This report discusses these issues while presenting the basis for product complaints, such as the composition ratio and typical examples.