Virtual Experiments using Machine Learning to Establish PA6 Depolymerization Conditions and Reaction Formulation based on Real Experiments

Haruki Chiba･Shoko Namera･Shuta Suzuki･Yasushi Terasaka･Satoshi Hirawaki (Honda R&D)

There are four main influencing factors in setting the conditions for PA6 depolymerization using the subcritical water method, and it requires a lot of resources to get an overview of the influences. Therefore, we worked on modeling technology using machine learning. By comparing the studied model and the Arrhenius plot model, we were able to construct a modeling technique that closely matches experiments regarding monomer yield conditions.

Development of Improved Friction Performance PA6-HMWPE Blends for Interior Parts

Yonghyeon Shin･Donguk Lee (Hyundai Motor)･Jaewon Moon･Sijun Park (Korea Polyacetal)

Friction characteristics between heterogeneous materials affect component's operating performance and friction noise, which are important factors for interior parts. In this paper, we studied on PA6/HMWPE-blended composite material with low friction coefficient and excellent self-lubrication property. To enable injection moulding of HMWPE which has low melt flow rate due to high molecular weight, research on material with improved melt flow rate and compatibility through the development of HMWPE mater batches and the addition of compatibilizer was preceded. And with this research, some interior parts that require operating performance were developed, and a composition suitable for each part's characteristics was derived.

Effect of Heating Temperature on Surface Modification of Silicone Hard Coat over Polycarbonate by Vacuum Ultraviolet Irradiation

Akihiro Shimizu (Ushio Inc.)･Ren Iida･Shinji Kambara (Gifu University)

Nojiri et al. developed a technology that modifies a silicone hardcoat surface with vacuum ultra-violet (VUV) irradiation to achieve wear resistance comparable to inorganic glass. To realize high productivity by applying the technique to the mass production of automobile window materials, it is necessary to reduce the VUV irradiation dose required for the modification. This study investigated the effect of heating temperature during VUV irradiation on the modification using nanoindentation. We found that the higher the heating temperature during VUV irradiation, the greater surface hardness at the same VUV irradiation dose, indicating that heating accelerates the modification.

Development of Heat Insulating Fabric Inspired by Silver Ants

Yuki Izawa･Kenji Miyazaki･Yasuhiro Ueda･Kana Tsunaba (Toyota Boshoku)･Tsuyoshi Kamitamari･Jun Syoyama (Seiren)

The temperature of automotive interior parts increases by about 100℃ under direct sun light. Passengers feel uncomfortable, and the energy is consumed by the A/C to cool them down. The silver ants in desert can reflect the sun light by their unique body hairs like ultra-fine and triangle cross-section. We developed a woven fabric by mimicking the specific body hair structure. As a result, the interior parts covered by the fabric decrease by 20℃ compared to conventional materials. Additionally, it has a silky design.

Approach to Reduce Environmental Impact of Fiber Reinforced Plastic by using Flat Glass Fiber

Yosuke Nukui･Shunsuke Harashima (Nittoboseki)

In recent years, there is a strong demand for the materials used in automotive to reduce the environmental impact (CFP reduction, recycling), and glass fiber used in fiber-reinforced plastic is also required to contribute to this demand.
In this research, we report the potential to reduce the CFP of fiber-reinforced plastic and to add value to the materials when they are recycled by using flat glass fiber