KHPP Series Film – Critical Protection AAMI Fabric for High-Risk Medical Environments

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

MediShield™ KHPP

Microporous Filler-Free PP Medical Barrier Laminate

MediShield KHPP Microporous PP Medical Barrier Laminate

MediShield™ KHPP is a microporous polypropylene barrier material developed for breathable medical laminates requiring fluid protection, viral barrier performance, and lightweight comfort.

Its engineered microporous structure allows air and moisture vapor to escape while helping block external liquids and biological contaminants.

Microporous Breathable Viral Barrier

Microporous PP Technology for Medical Protection

KHPP uses an engineered filler-free polypropylene microporous structure to balance air and moisture-vapor transfer with medical barrier performance. The membrane is lightweight, breathable, and suitable for laminated protective materials requiring reliable fluid and viral resistance.

Viral & Fluid Barrier

Tested medical barrier protection.

Air & Vapor Transfer

Microporous breathable structure.

Lightweight & Soft

Comfortable for medical wear.

Medical Tested

ASTM F1670 / F1671 PASS.

Core Performance

Microporous Barrier Engineered pores balance breathability and liquid resistance.
Physical Airflow Air and moisture vapor move through microporous pathways.
Moisture Management WVTR up to 6,000 g/m²·24 hr.
Lightweight Medical Laminate Breathable structure for protective medical use.

How KHPP Breathes Through Micropores

KHPP microporous polypropylene medical barrier technology

3-Layer Medical Laminate

Outer Layer

PP Spunbond Nonwoven

Soft protective surface.
Barrier Layer

KHPP Microporous PP Membrane

Breathable fluid and viral barrier.
Inner Layer

PP Spunbond Nonwoven

Strength and comfort.

KHPP Performance

Basis Weight 61 ± 3 g/m²
WVTR 6,000 g/m²·24 hr — ASTM E96 BW
Hydrostatic Resistance 500 cm-H₂O — EN 20811
Blood Penetration ASTM F1670 — PASS
Viral Penetration ASTM F1671 — PASS

Medical Applications

MediShield KHPP Surgical Gown Material

Surgical Gowns

Breathable protection for medical garments.

MediShield KHPP Surgical Drape Material

Surgical Drapes

Fluid barrier for surgical environments.

MediShield KHPP Chemotherapy Gown Material

Chemotherapy Gowns

Protective barrier for fluid-contact use.

MediShield™ Material Comparison

MediShield KHT KHPP Sleepy Series Material Comparison

Specification

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
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MicroBreath™ Pure (PP Filler-Free)

Redefining the Boundaries of Breathable Technology

Understanding AAMI Level 4 — The Benchmark for Barrier Integrity

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.

Why Kae Hwa Is Trusted in Medical Barrier Materials

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.
About Us
AAMI LEVEL 4

FAQ

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.