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Coronavirus (COVID-19) has spread rapidly around the world. This virus is particularly contagious and can be transmitted from person to person through droplets and even through air. As a result, demand for qualified masks is soaring and surgical masks are one of the major forms of protection.

Melt blowing is a conventional fabrication method for microfibers and nanofibers. In this process a polymer melt is extruded through small nozzles surrounded by high speed blowing gas. The randomly deposited fibers form a nonwoven sheet product that can be used for filtration, absorbents, apparel and drug delivery systems.

Why do we need to inspect raw materials?
The quality of raw materials is the most important factor in mask production - it will decide whether a mask is qualified or not
Inspection can protect interests of mask factories in the event of any quality and/or quantity dispute with their raw material suppliers
Representative sampling can help clients to demonstrate the quality of any dedicated parcel of raw materials

What do we do?
Verify the cargo and/or warehouse tally
Witness inspections
Issue survey reports
Offer on-site sampling for laboratory testing
Provide professional test reports to ensure the quality of raw materials

How is the quality of melt-blown raw materials verified?

We conduct melt-blown raw material testing according to different standards and methods, including:

Item

Melt-blown raw material test

Standard and method

1

Fabric weight

ASTM D3776

2

Color

Visual check

3

Width

Measurement

4

Material nature identity

In House method (By FT-IR)

5

Differential pressure (Delta P)

EN14683:2019 Annex C

6

Mean pore size

PMI

7

Thickness

ASTM D1777

8

Tensile Strength (M.D. and C.D.)

ASTM D5035

9

Elongation (M.D. and C.D.)

ASTM D5035

10

Bacterial Filtration Efficiency (BFE)

ASTM F2101

11

Sub-Micron Particulate Filtration Efficiency (PFE) at 0.1 micron PLS

ASTM F2299

12

Flammability

16 CFR 1610

13

Microbial cleanliness

EN 14683 / EN ISO 11737-1

 

SGS has the experience to provide one-stop testing, inspection and certification solutions for surgical mask manufacturers, from examination of raw materials – melt-blown fabric, through ISO 14644-1 cleanroom certification, and ISO 13485 management system certification of cleanrooms, to end-product testing. We also offer inspection and sampling services for those raw materials. 

 

For enquiries please click here