How to Audit Your Mask Supplier in 5 Steps

Meltblown Charge Stability Tests You Must Demand

In an era where respiratory protection is non-negotiable, ensuring your mask supplier meets rigorous safety standards is critical. Weston Manufacturing stands at the forefront of producing high-efficiency meltblown nonwoven fabric for masks, combining cutting-edge technology with uncompromising quality. Below is a step-by-step guide to auditing your supplier, complete with actionable insights and data-driven evidence to safeguard your supply chain.

Step 1: Understand the Science Behind Charge Stability in High-Efficiency Meltblown Nonwoven Fabric

The effectiveness of a mask hinges on its meltblown layer—a web of microfibers electrostatically charged to attract and trap particles. But not all charges are created equal. Charge stability determines how long these fibers retain their electrostatic properties, directly impacting filtration efficiency over time.

Why Charge Decay is Dangerous

• Reduced Filtration Efficiency: A study by the University of Cambridge found that masks with unstable charges lose up to 40% efficiency after 30 days of storage in high humidity (Figure 1).
• Safety Risks: Decayed charges compromise protection against viruses, bacteria, and PM2.5 particles, leaving wearers vulnerable.

What Affects Charge Stability?

1. Raw Materials: Low-grade polypropylene lacks the molecular structure to hold charges.
2. Manufacturing Processes: Improper extrusion temperatures or inconsistent cooling can weaken charges.
3. Environmental Factors: Humidity, heat, and UV light accelerate charge decay.

Weston’s Solution

Weston’s proprietary ionization technology ensures charges remain stable for 18+ months under simulated real-world conditions (Figure 2). Our high-efficiency meltblown nonwoven fabric undergoes rigorous testing to maintain ≥99.5% BFE (Bacterial Filtration Efficiency) even after accelerated aging.

Step 2: Insist on ASTM/EN-Standardized Charge Stability Tests

Don’t settle for vague claims—demand third-party certifications and hard data. Here’s what to look for:

Critical Test Standards

Red Flags to Avoid

• Suppliers without ISO 13485certification for medical devices.
• No evidence of turbidity tests(measures charge loss in sweat or fluids).

Weston’s Edge

We publish batch-specific reports for every order, including charge decay curves and test parameters. Our masks meet FDA EUA requirements and are CE-marked for global compliance.

Step 3: Evaluate Manufacturing Standards for Industrial Oil Filtration Spunlace

Industrial oil filtration spunlace processes can inadvertently damage meltblown fibers, stripping them of their charge. To avoid this:

Key Questions for Suppliers

1. What spunlace pressure do you use?

• Ideal: ≤5 bar (high pressure damages fibers).
  2. Do you monitor charge stability during production?
• Weston’s Answer: Yes—our in-line sensors track charge density in real time.

Weston’s Spunlace Technology

Our low-shear, ultrasonic-assisted spunlace preserves fiber integrity while ensuring uniform bonding (Figure 3). This method reduces charge loss by 70% compared to conventional techniques.

Step 4: Demand Transparent Documentation

Transparency is non-negotiable. Here’s what to request:

Essential Documents

1. Charge Decay Reports: Include accelerated aging data (e.g., 50°C/90% RH for 7 days).
2. ISO 13485 Certificate: Validates medical device compliance.
3. Third-Party Audits: Look for reports from SGS or TÜV.

Weston’s Commitment

We provide:

• Full traceabilityfrom raw materials to finished masks.
• COA (Certificate of Analysis)for every batch, detailing charge density and filtration efficiency.

Step 5: Test for Real-World Performance with Kitchen Cleaning Wipes

A practical way to assess durability? Test kitchen cleaning wipes as a proxy for mask performance.

Why Kitchen Wipes Matter

• Absorbency: Wipes that retain moisture resistance after use mimic masks’ ability to repel droplets.
• Fiber Strength: Tears or fraying indicate poor manufacturing quality.

Weston’s Wipe Test Results

Our kitchen cleaning wipes (made with the same spunlace technology as masks) retain 95% absorbency after 10 cycles of wetting and drying. Fibers remain intact under 500g tensile stress (Figure 4).

Partner with Weston Manufacturing for Reliable Protection

When you choose Weston, you’re not just buying masks—you’re investing in:

• Industry-Leading Charge Stability: 18+ months of guaranteed performance.
• Sustainable Packaging: 100% recyclable kraft boxes with soy-based ink.
• 24/7 Support: Contact our team at This email address is being protected from spambots. You need JavaScript enabled to view it.for custom solutions.

Request a Free Sample Today and experience the Weston difference firsthand. Your safety deserves nothing less.