Change of Texture with Time in Composite Material of Filler and Plastic

Abstract

Impression change is an important strategy for long-term use of the product. In this study, we focused on fillers and investigated the creation of materials that enable long-term use in combination with thermoplastics and fillers. First, polypropylene was used as a base material and kneaded with fillers such as inorganic material powder, metal powder, and Japanese paper. Next, samples were made by injection molding and sand-blasted to expose the filler to the surface. After that, the impression of the sample was evaluated. As a result, it was revealed that the feeling of newness, hardness, and flashy were derived as the evaluation axes. Besides, it was indicated that the characteristics of the filler affected the impression evaluation. Subsequently, the surface treatment of the sample simulating long-term use was performed. It was suggested that the abrasion changed the impression of the sample. These results showed the possibility of composite materials based on plastic for long-term use.