Equipping healthcare workers with reliable PPE requires a strict understanding of medical gown materials and standards. For procurement managers and infection preventionists, identifying the right fabric—whether breathable single-layer polypropylene or heavy-duty PE-coated laminates—is essential to balancing frontline safety with a facility’s total cost of ownership. A high-quality barrier must do more than just offer comfort; it must meet specific AAMI levels and pass rigorous ASTM testing for fluid and viral resistance. This guide breaks down the textile science behind common PPE fabrics like SMS and SMMS, helping you match clinical risk levels to the exact manufacturing specifications required for full regulatory compliance.

Matching Medical Gown Materials and Standards to AAMI Levels

Understanding isolation gown levels is critical for hospital procurement managers to ensure staff safety while managing costs effectively.

Quick Selection Guide: Material vs. Risk Level

Clinical Scenario	Risk Level	Recommended Material
Routine patient care	AAMI Level 1	Single-layer Spunbond Polypropylene
Blood draws, sutures	AAMI Level 2	SMS (25-30 gsm)
Emergency Room, ICU	AAMI Level 3	SMS / SMMS (35-45 gsm)
Pathogen/Viral defense	AAMI Level 4	PE-coated PP or specialized laminates

Technical Medical Gown Standards: ASTM & AATCC Testing Data

To be a leading medical gown manufacturer, products must pass rigorous standardized tests that quantify their barrier performance.

• Fluid Resistance: Measured via AATCC 42 (Impact Penetration) and AATCC 127 (Hydrostatic Pressure). Level 3 isolation gowns must withstand a water pressure of ≥50 cm H2​O.

• Viral Barrier: AAMI Level 4 isolation gowns must pass ASTM F1671, ensuring an impervious gown barrier against bloodborne pathogens and viruses (0% penetration).

Comparative Analysis of Medical Gown Fabric Materials

Most medical gowns are made of this material, it is called non-woven synthetic fibers.
As protection levels increase, laminated materials are used to strengthen, reduce permeability, or make it flame retardant.

Sometimes, the barrier properties of single-layer materials may not be enough for certain medical procedures. To create composite materials, additional materials may be added such as coatings, reinforcements, and laminates.
You can also enhance product attributes to increase absorbency, slip resistance, or other desirable characteristics.

4 Primary Materials Used in Medical Gown Standards

• Polypropylene (PP): Specifically spunbond polypropylene, used for basic barriers.

• Polyethylene (PE): Used for fluid resistant gowns and impervious coatings.

• Polyester (PET): Common in reusable isolation gowns.

• Spunbond Meltblown Spunbond (SMS): The gold standard for surgical gowns.

*For Reference Only
The following contains examples of materials used in isolation and surgical gowns. Select the appropriate material based on the specific usage scenario and the associated risk levels.

 

Single-layer

The most basic gown uses a single-layer spun-bond polypropylene (PP), and is breathable and comfortable.
It is used for basic patient care and medical or surgical unit maintenance, laundry, housekeeping, and acts as a barrier to non-hazardous cleanup in a dry environment.

Use single-layer when the expected risk of fluid exposure is low

 

Multi-Layer High-Performance Gown Materials (SMS & SMMS)

Multilayer fabrics are used to achieve specific objectives. For instance, outer layers are designed for puncture and abrasion resistance, middle layers ensure resistance to the penetration of fluids, and bottom layers provide comfort to users.

Name	SMS Spunbond Meltblown Spunbond	SMMS Spunbond+Meltblown x2+Spunbond Nonwoven	PPSB + PE coating Polyethylene-Coated Polypropylene Spunbond
Diagram
Laminated Details	Tri-laminated Spunbond polypropylene (PP) Meltblown polypropylene (PP) Spunbond polypropylene (PP) layer thickness~0.1mm	Four-laminated Spunbond (PP) Meltblown (PP) Meltblown (PP) Spunbond (PP)	Duo-laminated Polypropylene (PPSB) Polyethylene (PE) Spunbonded
Features	High tensile strength Softness Comfortable breathability Abrasion resistance Lightweight Waterproof and a barrier against bacteria, blood, and other liquids, as well as gas/steam transpiration.	Biodegradable Breathable Durable and tear-resistant Dust-free filtration Impervious Liquid repellent Non-irritating Lightweight Similar to SMS fabric features.	Coated with PE film Waterproof heat resistance high tensile strength Durable Lightweight Good moldability
Applications	Widely used at high-class protection areas like medical, industrial, laboratory pharmaceutical use: Isolation gowns Patient gowns Lab coats Coveralls Procedure gowns Medical face masks Boot covers Aprons Napkins and diapers	Widely applicable in conditions of fluid exposure ranging from moderate to severe: Isolation gown Surgical gown Surgical Face mask Shoe cover Scrub suits Surgical drape Medical drapes Medical equipment covers	Widely used in the high level of fluid resistant area, to prevent biological hazards or liquid chemicals: Disposable Isolation gown Surgical gown Bedsheets Sleeve cover

Key Barrier Features of Polypropylene (PP) Gown Fabric

Polypropylene has many great features including:

• very durable and resistant to wear, water, and stains to withstand long-term, repeated use
• being an excellent insulator because it has the lowest thermal conductivity among all synthetic and natural fabrics
• resistant to bacteria, mildew and other microorganisms
• high resistance to ignition (they can be ignited but are not combustible, their fire resistance can be enhanced by adding specific additives)
• dyed polypropylene fibers are resistant to sunlight and are fade-resistant.

These incredible benefits are the driving force behind the widespread adoption of PP in various industries, including textiles, manufacturing, and the medical sector worldwide.

Deep Dive: Engineering Medical Gown Materials and Standards

Polypropylene (PP)

A single layer of PP nonwoven fabric constitutes a soft cloth-like material that allows minimal exposure to fluids. Additionally, it acts as a protective barrier against harmful agents.

Polypropylene fabric can be affordable, comfortable, and breathable.

PP is a plastic that comes in many varieties which has the added benefit of being the least harmful to the environment. PP, a polymer that is inert and environmentally friendly, is gaining popularity across industries.

Polyethylene (PE)

PE is a single-layer plastic film that resists fluid. This fabric is highly durable, but has minimal breathability.
PE isolation gowns are used in situations where the patient’s blood, sputum, and breath may contain pathogenic bacteria, posing a potential threat to health and safety.

Polyethylene material is used in medical gowns to provide better resistance to fluid exposure.

PE Properties

PE is a synthetic fiber made from polymerized, polyethylene units. It’s often monofilament. However, it can also be made as a continuous filament yarn or staple fiber. PE yarn is inherently non-dyeable; however, it can be dyed by adding pigments to the melt during extrusion. PE can come in many different forms. The amount of branching in ethylene polymer units along the main chain will determine the structure. The fiber’s strength is determined by how much branching there is.

Typical Nomenclature for PE Includes:

• Linear low-density polyethylene (LLDPE)
• Low-density PE (LDPE)
• Medium-density PE (MDPE)
• High-density polyethylene (HDPE)
• Ultra-high molecular weight PE (UHMWPE).

Surgical-Grade Materials: SMS vs. SMMS Construction

SMS fabric features a unique trilaminate structure. The “Meltblown” center acts as a microscopic filter, providing high tensile strength while remaining breathable. This is why it is the most popular choice for sterile surgical gowns.

Spunbond-Meltblown-Meltblown-Spunbond Nonwoven (SMMS)

SMMS fabric belongs to a type of laminated nonwoven with four layers. It is composed of two layers of spunbond and two layers of meltblown.

Similar to SMS fabric, SMMS features an additional layer providing enhanced fluid resistance, making it well-suited for extended use in conditions with moderate to high fluid exposure.

What is Polypropylene Spunbond Nonwoven Fabric (PPSB)?

When spunbond PP is combined with a PE coating, it creates a high-performance fluid resistant gown. This standard fabric is designed for protection against microbial particulates and liquid chemicals in high-risk workplaces.

A lightweight material with increased fluid resistance protection.

What is Polypropylene Spunbond Nonwoven Fabric (PPSB)?

Spunlaid, commonly known as spunbond nonwoven fabric, is made from the continuous spinning of fibers, either directed with air streams or dispersed in a web-like shape. This process can significantly increase the production speed.
These materials are usually prepared in sheets or web structures and bonded through the entanglement of fibers or other filaments using thermal or chemical treatment methods, depending on the spunbond fabric manufacturer or supplier.
Nonwoven polypropylene fabric is a thermoplastic plastic polymer akin to PP, but it is designed to appear non-woven. It is used primarily in non-woven bags, interlining, face masks, healthcare coveralls, and isolation gowns, etc. It is becoming more popular in the fashion and healthcare industries.

10 Properties of Nonwoven Polypropylene Fabric

1. Strong impermeability
2. High tensile strength
3. Strong chemical resistance,
4. Corrosion resistance
5. Mildew resistance
6. Broad temperature range
7. Long lifespan
8. Good stability
9. Non-toxic
10. Water resistance

What is PE coating?

PE coating offers 3 key properties.

• Waterproofing
• Durability
• Longevity

The primary benefit of PE-coated fabrics lies in their durability and resistance to mold and mildew, because such coating prevents moisture from entering, thereby eliminating the possibility of mold growth.

 

Custom Manufacturing to Specific Medical Gown Standards

We offer ODM/OEM service to help optimize the development of buyer’s medical gowns.
Medtecs is committed to create your product to the highest standards.
Here are the customization options currently available:

Fabric Types

• SMS
• SMMS
• PP
• PE
• PPSB+PE coating

Taped Seams

• Serged Seam
• Bonded Seam
• Heat Sealed Seam

AAMI Levels

Are you interested in understanding how Medtecs’ Cover U and isolation gown can provide protection for your employees and health professionals?

Our experts are just a click away, ready to guide you through the complex landscape of today’s healthcare safety regulations.

Frequently Asked Questions (FAQ)

Q: What is the best material for Level 3 surgical gowns? A: High-quality SMS or SMMS with a weight of $\ge 45\text{ gsm}$ is typically the best choice, balancing a superior hydrostatic barrier (≥50 cm H2​O) with the breathability required for long surgical procedures.

Q: Can I order custom hospital gowns for my facility? A: Yes. As global medical gown manufacturers, Medtecs offers ODM/OEM services to provide custom hospital gowns tailored to specific AAMI levels, sizes, and brand requirements.

Q: What makes a gown “impervious”? A: An impervious gown usually features a polyethylene (PE) film or coating that allows zero fluid penetration, meeting AAMI Level 4 standards for critical viral protection.

References

1. A Review of Isolation Gowns in Healthcare: Fabric and Gown Properties. (2015, September 1). PubMed Central (PMC). 
2. P. (2020, December 24). What is Polypropylene Spunbond Nonwoven Fabric? Is PP Spunbond Nonwoven Fabric Biodegradable? Park Non-Woven – Manufacturer of Non-Woven Fabric. 
3. Corrosionpedia. (2017, October 10). Polyethylene (PE). 
4. A. (2021, April 20). What is SMS Nonwoven Material for Disposable Patient Gown? Custom-Made Home & Hotel Textile Manufacturer. 
5. R.I.C.H.A.R.D.H.O.Y.T. (n.d.). What Is Polyethylene Fabric? Hunker.