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:
Metal Edge Seal
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.
One Step Process (No Surface Vacuum Seal)
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.
High Precision Micro-supporting Pillars
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.
Needle-Shape Getter Technology
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:
New builds
High-performance façades and curtain walls.
Glazing Retrofits
Upgrading existing windows without altering façade structure or architectural aesthetics.
Luxury retail & hospitality
Enhancing comfort while preserving design transparency.
Green buildings
Meeting stringent sustainability certifications. Certified Platinum Green Product by HK Green Building Council.
Frequently Asked Questions
💡 What makes VacStar's Metal Edge Seal technology unique?
Unlike traditional vacuum glazing that relies on glass-to-glass sealing, VacStar employs a low-temperature soft metal edge seal. This eliminates the need for re-annealing tempered glass, ensures high shear and compressive resistance against extreme climates, prevents micro-leaks, and enables a slim aesthetic profile.
💡 How does the One Step Process benefit the vacuum glass structure?
The One Step Process completes the edge seal in a vacuum chamber, eliminating the vacuum suction hole on the glass surface. This increases production efficiency, eliminates stress points that lead to cracks or seal failure, and allows the glass panes to retain their natural mechanical strength.
💡 Why are ceramic pillars preferred over metal alternatives?
VacStar uses advanced ceramic pillars applied via 3D printing and baked onto the glass during tempering. They provide exact placement and a stable vacuum gap, prevent shifting or missing pillars, and deliver superior thermal and acoustic insulation compared to metal pillars.
💡 What is the role of the Needle-Shape Getter Technology?
The needle-shape getter is a specialized material that continuously absorbs residual gas molecules inside the vacuum cavity. This ensures a stable vacuum environment for decades, prevents thermal performance degradation over time, and provides maintenance-free operation.
💡 What are the key performance ratings of VacStar vacuum glass?
VacStar features outstanding thermal insulation with U-values as low as 0.4 W/(m²·K), a slim design ranging from 2 to 12.2mm, jumbo size capacity up to 2400x4000mm, significant acoustic comfort, and proven durability under varying climates.
💡 Where can VacStar vacuum glass be applied?
It is highly versatile and ideal for new builds (façades and curtain walls), glazing retrofits (upgrading existing windows without altering structures), luxury retail and hospitality, and green buildings where it is certified as a Platinum Green Product by the HK Green Building Council.