AAMI Level 4 medical barrier fabric engineered to eliminate viral penetration, fluid strike-through, and shadowing during high-risk surgical and chemo procedures. Certified to ASTM F1671/F1670 with strong hydrostatic pressure and breathable PP membrane technology for long-wear comfort.
Comfortable
Functional
Protection
Major surgeries, oncology treatments, and infectious-disease procedures require absolute certainty in protection.
Kae Hwa’s Critical Protection AAMI Fabric is engineered to meet the AAMI PB70 Level 4 standard—the highest classification for liquid and viral barrier integrity.
Built upon decades of microporous film innovation and advanced lamination technology, this fabric ensures not only proven viral resistance but also comfort, breathability, and reliable structural performance throughout long medical procedures.
KHPP microporous membrane is suitable for use in breathable medical laminates designed for:
Our medical barrier fabrics are verified through globally recognized protection standards, including ASTM F1671 viral penetration resistance, ASTM F1670 blood penetration resistance, AATCC 127 hydrostatic pressure performance, and ISO 16604 bloodborne pathogen barrier compliance.
The Critical Protection AAMI fabric combines a high-opacity outer film with a virus-proof membrane to effectively block blood, bodily fluids, bacteriophage Phi-X174 (31 nm), and alcohol or chemical exposure during medical procedures.
Using either the AquaVene™ monolithic membrane or MicroBreath™ microporous membrane, the fabric delivers high moisture vapor transmission (up to 6,000–7,000 g/m²·24hr), a soft inner nonwoven for skin comfort, and a complete liquid-impermeable barrier. This high breathability keeps reinforcement zones comfortable even during extended surgical procedures.
Our multi-layer medical laminate structures—such as Nonwoven + Film + Nonwoven (SFS / SMS / SSMMS) — provide high tear strength, reliable seam-sealing compatibility, and reduced shadowing through opaque membrane design ideal for endoscopic operations.
| Brand | Medishield™ |
| Product Form | Roll |
| Material | Breathable PP Film + Nonwoven Fabric |
| Structure | 2-Layer or 3-Layer Composite |
| Breathability Mechanism | High Vapor Permeability |
| Barrier Properties | High Hydrostatic Pressure Resistance, Viral and Fluid Penetration Barrier |
| Surface Treatment | Corona / Custom Color (White, Blue, Green) |
| Weight | 50 - 72 gsm |
| Overall Width | 1500 - 1550 mm (Customizable) |
| Length | 500 - 1500 m |
| Application | AAMI Level 4 disposable surgical gowns, Chemotherapy protective gowns, Surgical drapes |
AAMI Level 4 is the highest protection level under the AAMI PB70 standard. It is assigned to materials used in high-fluid, high-infection-risk procedures, including orthopedic, cardiovascular, and trauma surgeries.
To meet Level 4 requirements, the fabric must pass ASTM F1671 viral penetration testing—the defining threshold separating Level 3 and Level 4.
With over 60 years of polymer and lamination expertise, Kae Hwa is a proven specialist in medical barrier fabrics used in high-risk surgical and protective applications. Our materials are internationally certified—including AAMI Level 4, ASTM F1671/F1670, ISO 16604, and EN 14126—ensuring reliable viral, fluid, and pathogen protection for clinical environments.
We develop medical laminates using proprietary technologies such as MicroBreath™ microporous membranes, AquaVene™ monolithic hydrophilic films, and HydraProof™ dense waterproof barriers, enabling both strong protection and sustained comfort.
AAMI Level 4 requires passing the ASTM F1671 Viral Penetration Test. While Level 3 resists liquid splash, Level 4 provides a total barrier against bloodborne pathogens and viruses in high-risk environments.
By integrating AquaVene™ or MicroBreath™ membranes, the fabric achieves a high moisture vapor transmission rate (6,000–7,000 g/m²·24hr), allowing heat and sweat to escape while remaining 100% liquid-impermeable.
Yes. Its high-barrier laminate structure effectively blocks hazardous chemical and drug exposure, meeting the safety requirements for oncology gowns and high-fluid procedures.
We use a multi-layer SFS/SMS laminate (Nonwoven + Film + Nonwoven). This ensures high tear strength, puncture resistance, and excellent compatibility with seam-sealing technologies.
Absolutely. We offer customizable Basic Weight (48–100 gsm), Width (80–2000 mm), and Colors (White/Blue/Green) to meet your specific regional or clinical requirements.
Our fabric is fully certified to meet AAMI PB70 Level 4, ASTM F1671/F1670, ISO 16604, and EN 14126 for maximum clinical reliability.
