Honor reappearance, hard to move forward, the rise of the day again in 2024, won the plastic industry Jung technology innovation award.
2024 Plastics Innovation Application and Processing Technology Summit Forum
Lightweight high-strength polyamide alloy material for smart wearable devices
This material has the following characteristics: low specific gravity, the lowest density can be 1.05g/cm3, high rigidity, tensile modulus greater than 7000MPa, good adhesive performance, can be bonded with other materials through glue, reduce the thickness of the product, good chemical resistance and biocompatibility, direct contact with human skin, no allergic reaction.
The related material can be used for parts such as an earphone, a smart watch/bracelet, and a smart glasses shell, which greatly reduces the weight of the product and improves the user experience.
The material innovation point is to significantly reduce the density performance of polyamide materials in advance of maintaining high rigidity, and improve its surface polarity, and improve the defects of nylon materials that are not easy to glue. Generally, it is regular to reduce the specific gravity of materials by physical or chemical foaming process. However, since intelligent wearable devices are generally miniaturized and thin-walled parts, it is difficult to realize through this method, or the apparent and mechanical strength are poor, and the yield of good products cannot reach the requirements. On the other hand, it is necessary to solve the problems of insufficient surface adhesion of polyamide materials and poor glue adhesion. This material is to select bio-based long carbon chain nylon as the base material, add low specific gravity hollow microsphere/glass fiber composite filling reinforcement, through mineral surface modification protection technology, polar alloy compatibility control technology and shear dispersion processing process stabilization control technology, to achieve a low specific gravity high rigidity can be adhesive polyamide alloy material.
Development background
In recent years, the wearable device market has developed rapidly. From the perspective of shipments, according to statistics, the global shipments of smart wearable devices have increased from 0.102 billion units in 2016 to 0.534 billion units in 2021, and the revenue scale in 2021 will reach 55.061 billion billion US dollars. Recently, with the release of a new generation of smart glasses devices by Apple and others, a new round of great development in the wearable market is expected. It is predicted that global shipments of smart wearable devices will reach 1.358 billion units in 2025. In the field of smart wear, including sports headphones, smart watch bracelets, smart glasses and other fields, most of these wearable products integrated with more electronic devices are very bulky, of which the weight of plastic materials also has a considerable proportion, wearing experience is not comfortable ideal. It is very important to develop and use more lightweight and higher strength functional integrated materials with excellent comprehensive performance, realize the miniaturization and integration of equipment terminals, and improve the user comfort experience, which has important application value.
According to the market development needs, Shanghai Risheng has developed relevant materials relying on patents to give full play to its own advantages, and the relevant projects have achieved preliminary verification in the leading domestic sports headset enterprises in 2023.
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Author: Xiao Jiu
Editor: Xiao Jiu
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