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"Meltblown penetration tester virus" refers to

specialized equipment and standardized test methods used to evaluate how effectively meltblown nonwoven fabrics—the key filtration layer in face masks and protective clothing—block viruses and virus-sized particles.

Meltblown Fabric and Viral Filtration

Meltblown nonwoven fabric is the core material responsible for filtering fine particles in high-efficiency masks (like N95, FFP2, and surgical masks). Its effectiveness stems from a dense network of ultrafine fibers and, crucially, an applied electrostatic charge (electret process) that captures both charged and neutral particles, including bacteria and viruses.

Test Standards: Performance is measured against national and international standards, such as ASTM F1671 (Standard Test Method for Resistance of Materials Used in Protective Clothing to Penetration by Blood-Borne Pathogens Using Phi-X174 Bacteriophage) and EN 149 standards in Europe.
Surrogate Viruses: The actual virus is rarely used for routine testing in all labs due to safety requirements (e.g., Biosafety Level 3 labs for SARS-CoV-2). Instead, non-pathogenic bacteriophages (viruses that infect bacteria) like Phi-X174 or MS2, which are similar in size and shape to bloodborne pathogens and coronaviruses, are used as surrogates.
Test Aerosols: For particle filtration efficiency (PFE) testing, an aerosol of sodium chloride (NaCl) or paraffin oil is often used to simulate real-world conditions. The "most penetrating particle size" (around 0.3 micrometers or µm for NaCl) is used to challenge the filter material's capabilities.
Penetration Tester Equipment: This equipment clamps the fabric sample between chambers and challenges it with a controlled flow of the test virus suspension or aerosol. A vacuum then draws the challenge through the mask material, and sampling methods are used to measure the percentage of particles/viruses that pass through. Lower penetration results are ideal.

Multi-Layered, Corona Charged Melt Blown Nonwovens ... - NIH
Feb 3, 2021 — Abstract. Particulate matter (PM) and airborne viruses bring adverse influence on human health. As the most feasible wa...
National Institutes of Health (.gov)
Why are the Meltblown Nonwoven Face Masks You Produce ...
May 5, 2020 — The meltblown nonwoven, the core material of the mask, determines to a large extent whether the masks made are qualifie...
www.testextextile.com
Developing antiviral surgical gown using nonwoven fabrics for ...
Evaluation of Trilaminate surgical gown Viral penetration test. To investigate the antiviral property, viral testing of surgical g...
National Institutes of Health (.gov)

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Decontamination of SARS-CoV-2 and Other RNA Viruses from ...

ACS Publications

https://pubs.acs.org › doi

ACS Publications

https://pubs.acs.org › doi

by RK Campos2020Cited by 90 — In this study we tested disinfection of three viruses, including SARS-CoV-2, dried on a piece of meltblown fabric, the principal component ...

A new approach to measure the resistance of fabric to liquid ...

PLOS

https://journals.plos.org › plosone › article › journal.po...

PLOS

https://journals.plos.org › plosone › article › journal.po...

by M Li2019Cited by 13 — Viral penetration is detected by extracting virus from the surface of the specimen after the pressure sequence is concluded. Time trials, i.e. ...

How to Improve the Filtration Efficiency of Meltblown Cloth?

gesterinstruments.com

https://www.gesterinstruments.com › how-to-improve-t...

gesterinstruments.com

https://www.gesterinstruments.com › how-to-improve-t...

Aug 4, 2021 — As the core material of medical masks, meltblown non-woven fabrics have a direct impact on the protective effect of the masks.

Decontamination of SARS-CoV-2 and other RNA viruses ...

medRxiv

https://www.medrxiv.org › content

medRxiv

https://www.medrxiv.org › content

Aug 14, 2020 — In this study we tested disinfection of three viruses including SARS-CoV-2, dried on a piece of meltblown fabric, the principal component ...

Meltblown Nonwoven Fabric: From the Core of Masks to ...

teda-filters.com

https://teda-filters.com › meltblown-nonwoven-fabric-fr...

teda-filters.com

https://teda-filters.com › meltblown-nonwoven-fabric-fr...

How can this 'breathing' material filter viruses? And how did it penetrate into the automotive, medical, and environmental protection fields? This article ...

One year of surgical mask testing at the University of ...

ScienceDirect.com

https://www.sciencedirect.com › science › article › pii

ScienceDirect.com

https://www.sciencedirect.com › science › article › pii

by C Boi2022Cited by 8 — A multidisciplinary lab was created to test surgical masks due to COVID outbreak. 435 mask prototypes were tested during the emergency according to the EU ...

Gbb R Melt Flow Indexer

GBPI

https://www.gbpitester.com › blog › gbb-r-melt-flow-in...

GBPI

https://www.gbpitester.com › blog › gbb-r-melt-flow-in...

Detailed explanation of the filtration efficiency detection of melt blown cloth particulate matter May 5,2020. Is the meltblown cloth you purchased really ...

How India Outstandingly Ramped-Up its PPE Kit ...

park non woven

https://parknonwoven.com › how-india-outstandingly-r...

park non woven

https://parknonwoven.com › how-india-outstandingly-r...

The primary goal of the PPE Kits is to attain best, comprehensive, and robust protection for the mouth, nose, eye, body from infected droplets that may carry ...

Development of breathable and liquid/wet bacterial ...

Sage Journals

https://journals.sagepub.com › doi

Sage Journals

https://journals.sagepub.com › doi

by WA El-Ghoubary2023Cited by 3 — The results showed that the produced composite fabrics offer outstanding breathability and, thus, the surgical team members' comfort.

Meltblown Nonwoven Fabric | All you should know

Shang Ta Chia Industrial Co., Ltd.

https://www.stcmach.com › SCP-00