VacStar Technology
VacStar has developed VacStar series, its flagship vacuum glass solution, engineered to meet building façade structural requirement and diverse market needs. VacStar combines ultra-thin vacuum layer with high precision micro-supporting pillars and advanced edge-sealing technology. Key technologies include:
Unlike traditional vacuum glazing that relies on glass‑to‑glass sealing, VacStar employs a low‑temperature soft metal edge seal. This ensures:
- Low processing temperature (< 250 °C) – No re‑annealing of tempered glass panes is required, ensuring fully tempered vacuum glass for maximum safety.
- Superior durability – Dense structure with lower gas permeability, delivering a service life of more than 25 years.
- Resilient strength – High shear, tensile, and compressive resistance, enabling the structure to withstand even the most extreme climate conditions.
- Enhanced reliability – Prevents micro‑leaks that can compromise vacuum performance.
- Slim aesthetics – Allows for a narrow edge profile, ideal for retrofit projects where appearance matters.
VacStar adopts one step process where the edge seal is completed in vacuum chamber that avoids vacuum suction hole on glass surface. Benefits include:
- High Production efficiency – Skip time consuming vacuum suction process by completing edge seal and vacuum in one process.
- Higher Durability – Eliminating stress points that often lead to cracks or seal failure.
- Improved mechanical strength – Glass panes retain their natural resilience.
- Cleaner design – Seamless integration into frames without visible seal marks.
VacStar leverages advanced ceramic pillar technology to deliver superior performance in vacuum glass applications.
- Precision & Stability – Ceramic supporting pillars are applied using advanced 3D printing technology and baked onto the glass during tempering, ensuring exact placement, a seamless bond, and a consistently stable vacuum gap.
- Efficiency & Reliability – The integrated process streamlines production, eliminates defects such as shifting or missing pillars, and enhances overall manufacturing efficiency compared to metal alternatives.
- Superior Insulation – Ceramic pillars provide better thermal and acoustic insulation than metal pillars, ensuring best energy efficiency and comfort in architectural applications.
VacStar incorporates a needle-shape getter, a specialized material that continuously absorbs residual gas molecules inside the vacuum cavity. This innovation delivers:
- Stable vacuum environment – Maintains extra-high vacuum for decades.
- Consistent thermal performance – Prevents degradation of insulation values over time.
- Maintenance-free operation – No need for re-sealing or re-vacuuming.
Excellent Performance
Applications of Vacuum Glass
VacStar is versatile across residential, commercial, and heritage projects. It is particularly valuable for:
What makes VacStar vacuum glass different from traditional double-glazed windows?
VacStar vacuum glass features an ultra-thin vacuum layer between the glass panes, achieving U-values as low as 0.4 W/(m²·K) — significantly better than standard double glazing. Its metal edge seal, ceramic micro-pillars, and needle-shape getter technology together ensure superior thermal insulation, durability, and a maintenance-free service life of over 25 years.
Can VacStar vacuum glass be used in retrofit projects without modifying existing window frames?
Yes. VacStar is available in thicknesses from 2 to 12.2mm, making it highly compatible with existing window frames. Its slim profile and narrow edge design allow direct replacement of conventional single or double glazing without requiring structural changes to the façade.
Is VacStar vacuum glass safe? Does the manufacturing process affect the glass strength?
Absolutely. VacStar uses a low-temperature metal edge seal processed below 250°C, which means the tempered glass panes do not require re-annealing. The glass retains its full tempered strength, and the one-step vacuum process eliminates surface suction holes that can be stress points in conventional vacuum glazing.
What is the maximum size of VacStar vacuum glass panels?
VacStar vacuum glass can be manufactured in jumbo sizes up to 2400 x 4000mm, making it suitable for large-scale commercial façades, curtain walls, and high-rise architectural projects.
Does VacStar vacuum glass have any green building certifications?
Yes. VacStar has been certified as a Platinum Green Product by the Hong Kong Green Building Council. Its outstanding thermal and acoustic performance helps buildings meet stringent sustainability certifications and energy efficiency standards.
How does the needle-shape getter technology help maintain vacuum performance over time?
The needle-shape getter is a specialized material embedded within the vacuum cavity that continuously absorbs any residual gas molecules. This keeps the internal vacuum at an extra-high level for decades, preventing degradation of thermal insulation performance and eliminating the need for any re-sealing or re-vacuuming over the product's lifetime.