Application of TPE Materials in the Beauty Device Industry: Case Study on the TA55H5-MRY Button Solution
Time of issue:2026-01-19
Case Background
Customers—beauty device manufacturers—are facing critical technological challenges: they need to achieve seamless, encapsulated sealing on PC hard-shell housings while ensuring that the materials possess low hardness, high-temperature deformation resistance, crack resistance, and long-term resistance to yellowing. Traditional materials tend to suffer from sealing failures and UV-induced yellowing, which compromise both product longevity and aesthetic appeal.
Customer’s core needs
- Substrate compatibility: Sturdy, rubber-coated PC casing
- Mechanical properties: Low-hardness elastomer, resistant to stress cracking
- Weather resistance: Long-term resistance to UV yellowing (for outdoor use scenarios)
- Thermal stability: Resistant to high-temperature deformation (operating environment ≥80℃)
- Process compatibility: Suitable for injection molding at 200℃
Solution: TA55H5-MRY Material Properties
This modified TPE/TPU material boasts three core advantages:
1. Excellent encapsulation performance: Forming molecular-level bonding with PC through chemical bonding, the peel strength exceeds 15 N/cm, and the matched thermal expansion coefficient significantly reduces the risk of cracking due to thermal cycling.
2. Enhanced Durability: After undergoing a QUV accelerated aging test for 500 hours, the color difference ΔE is less than 1.5; after 48 hours of thermal aging at 120℃, the compression set rate is less than 30%.
3. High Processability: High fluidity (MFR 35 g/10 min) ensures precise filling of fine sealing structures, while the low-temperature injection molding process at 200℃ reduces energy consumption and thermal damage to the PC substrate.
Implementation process
During the material selection phase, we narrowed down our choices from six TPE options to TA55H5-MRY, whose Shore 55A hardness strikes a perfect balance between elasticity and sealing force. The process validation followed a four-step approach: mold design optimization → injection molding parameter adjustment → electron microscopy analysis of the encapsulation interface → thermal cycling tests (-40℃ to 85℃) and UV accelerated aging tests. A key breakthrough was the development of a secondary injection molding pressure-holding process that effectively eliminates micro-gaps, along with the addition of a specialized silicone additive to enhance scratch resistance, thereby meeting the specific requirements of cosmetic contact in beauty devices.
Achievements and Value
- Sealing reliability: 5,000 press tests showed zero cracks, reducing the after-sales repair rate by 40%.
- Long-lasting appearance: No visible yellowing under natural light for 1 year, enhancing the product’s premium appeal.
- Production efficiency: The molding cycle has been shortened by 18%, resulting in an annual production capacity increase of 150,000 units.
Industry Promotion Potential
This solution has been successfully extended to applications in the 3C electronics sector, including waterproof sealing rings for electric toothbrushes, rubber-coated grips for drone remote controls, and soft-contact components for AR glasses temples. Cases have demonstrated that TA55H5-MRY, through innovative molecular structure design and processing techniques, effectively addresses the common pain points associated with precision rubber coating in the consumer electronics industry.
TEL: +86-0752-6768128 FAX: +86-0752-6768088 MAIL: sales@tpe-sp.com WEB: en.tpe-sp.com
ADD: Huangxi Industrial Park, Shiwan Town, Boluo County, Huizhou City, Guangdong Province，China