Self-Cleaning Antibacterial Vitreous Enamel Panel (VEP)

Dr. Garrison Chau, Technical Manager Dr. Ivan SHAM, R&D Director

Construction & Building Materials

Feb. 2020

Vitreous Enamel Panel (VEP)

• A thin inorganic glassy coating fused under high temperature over decarbonized steel

• With outstanding durability, aesthetics, as well as convenience, VEP is widely utilized

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Tai Wai Tunnel MTR Station

The-State-of-the-Art

• Self-cleaning & anti-bacterial VEP is the state-of-the-art product w/ nano-modification

Low maintenance rate

Highly durable

Color diversity

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Wide Range of Applications

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Specifications

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Antibacterial efficiency for E. Coli (JIS Z 2801) > 99.9%

Antibacterial efficiency for S. Aureus (JIS Z 2801) > 99.9%

Surface water contact angle (ASTM D7334) < 20°

Surface gloss level variation (ISO 2813) < 10GU

Functional top coat thickness 150~250 mm

Colour consistency, DE (ISO 7724) < 1.0

Acid resistant (BS EN 14483-1) Class A+

Alkali resistant (BS EN 14483-4) Loss in mass 20g/m2

Thermal shock (BS 1344-1) No visual damage

Award Winning Technology

• Patented & award winning technology from HK US Provisional Patent 62/870,073 in July 2019

Gold Medal & Outstanding Building Material Award in the Asia International Innovative Invention Award 2019

Gold Medal in the Inventions HK 2019

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• By implanting nano-particles of heavy metal compound such as silver, zinc, copper, etc.

• Dramatically enhanced level of resistance to microbes, mold, bacteria, & fungus

• All-in-one enamel top coat fired under ~850°C

NAMI’s Nano-Modification

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Excellent Antibacterial Efficacy

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Normal VEP Nano-modified scaVEP

Antibacterial Efficacy of scaVEP

E. Coli S. Aureus

> 99% > 99%

Performance in Self-Cleaning

• The measured water contact angle

Untreated normal VEP > 37°

NAMI’s nano-modified scaVEP < 15°

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Normal VEP Nano-modified scaVEP

Production Trial

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