Color Stable Anti-Yellowing Bionic Skin

With the continuous expansion of application of global humanoid robots and simulation dolls, a large number of bionic exhibits serve as permanent display items in science museums, cultural tourism exhibition halls and brand show windows. These exhibits receive continuous irradiation from spotlights and LED light sources all year round. Some window exhibits are also exposed to ambient ultraviolet rays. Long-term continuous lighting will cause oxidative degradation of silicone polymer chain. After a period of display, the skin gradually yellows and darkens. Aging rate varies on different positions and leads to mottled uneven skin tone. The highly simulated skin appearance is damaged and the display effect deteriorates greatly.

Many exhibition projects have to remove and replace the whole bionic skin periodically. Each replacement brings material cost for silicone and skin fabrication, plus labor cost for robot disassembly, assembly and debugging. The exhibits have to be temporarily removed from display, disturbing venue reception and daily operation. If large-area trunk skin needs replacement, the overall cost rises sharply, becoming heavy operation burden for permanent bionic display projects.

Conventional bionic silicone has four obvious weaknesses when used for long-term exhibition. First, poor light aging resistance, polymer oxidizes and turns yellow under long spotlight exposure with irreversible darkening of skin tone. Second, color difference easily appears on large-area skin, mottled surface due to inconsistent aging speed. Third, high replacement cost, large bionic skin has long manufacturing cycle and complex installation. Fourth, trace ultraviolet in semi-open window environment accelerates aging and discoloration and shortens skin service life.

Besides humanoid robots, window simulation dolls, long-term static display props and long-duration aging test samples in research institutes also suffer from light aging and skin yellowing. The market is in urgent need of bionic skin silicone that combines delicate simulation texture, good mechanical performance and long-term weathering anti-yellowing capability.

Targeting the pain point of skin yellowing caused by light aging of long-term display bionic exhibits, Shenzhen Hong Ye Jie Technology has carried out multiple rounds of light stabilizer screening, cross-linking system adaptation and UV accelerated aging tests, and launched weathering resistant anti-aging non-yellowing bionic skin silicone. The product compounds stable light stabilizing and antioxidant components into the molecular raw-material system, binding firmly with the cross-linking network, and does not leach out with wiping and contact, restraining polymer oxidative chain breakage and delaying skin yellowing and darkening.

Its core strengths lie in long-term weathering anti-aging, resistance to lamp and UV radiation and stable skin tone for permanent exhibition. Different from ordinary silicone that yellows and darkens after several months of display, this material has slight skin tone change after long-time light radiation according to accelerated aging test. The color of large-area skin remains uniform without obvious mottled patches. Meanwhile it preserves decent bionic-simulation effect, low-shrinkage texture reproduction as well as tear-resistance and anti-fatigue dynamic performance for stable robot facial micro-expression and joint-movement operation.

It achieves perfect combination of realistic bionic texture, dynamic mechanical capability and long-term anti-yellowing weather resistance. Ultra-low curing shrinkage reproduces fine pores and skin lines. Neutral wet wipes can be used for daily exhibit maintenance and regular cleaning will not accelerate aging and discoloration. Good tear-resistance and anti-fatigue performance prevent cracking and peeling upon repeated deformation. The finished material meets the requirement of stable appearance for long-time permanent exhibition in halls, lowering maintenance and skin replacement cost of exhibits.

Compatible with pouring and brushing molding processes. Anti-yellowing performance remains stable across batches with high finished-product yield, suitable for prototype development and mass procurement for permanent exhibition projects.

This weathering resistant anti-aging non-yellowing bionic skin silicone is widely applicable for science museum permanent humanoid robots, cultural tourism long-time display bionic devices, window simulation doll exhibits, semi-lighting simulation props and scientific aging durability test samples, for projects with explicit requirements on long-term skin color stability and light aging resistance.

Hong Ye Jie Technology keeps iterating full-series differentiated bionic-silicone formulas covering durability, moisture-resistance, high-toughness, clean-grade, environmental-safety and long-term weathering protection requirements. Free-of-charge sample testing, customized skin tone & hardness adjustment and full-process technical support are offered, helping global permanent exhibition humanoid robot and simulation exhibit projects resolve skin yellowing problems caused by lamp irradiation and reduce long-term maintenance burden.