Meta-aramid acoustic felt 300 g/m², for sound-insulation panel cores
100% meta-aramid (aramid 1313) · Nonwoven felt, 300 g/m² · Core layer of sound-insulation panels for data centres and server rooms
A 300 g/m² meta-aramid felt for the middle layer of a sound-insulation panel — the core that does the acoustic and thermal work in data centres, server rooms and similar plant rooms. Inherently flame resistant, non-melting, supplied on material-level data.
- Inherently flame resistant — the property is in the fibre, not in a finish
- 300 g/m² nonwoven felt, for the core layer of a sound-insulation panel
- ASTM E84 Class A — a building-material surface burning test, not a PPE standard
The material
A nonwoven felt for sound insulation, not a garment shell
This is an aramid felt: a nonwoven structure of meta-aramid (aramid 1313), supplied at 300 g/m². The fibre is inherently flame resistant — the flame resistance belongs to the polymer, not to a finish applied after the felt is made, so it cannot be washed out or worn off — and it does not melt or drip. Meta-aramid is used continuously at around 250 °C and only begins to decompose above 370 °C, and its limiting oxygen index of 28–32 is well above the 21% oxygen in ordinary air, so it self-extinguishes once the ignition source is removed.
The nonwoven build is the point of the material, and it is also its limit. A felt is a low-density, nonwoven structure: its strength is insulation — thermal, acoustic and filtration — rather than the mechanical strength a protective garment outer layer has to carry. That is why this felt is bought as a component rather than as a shell, and why which standard applies to it depends entirely on the job it is doing.
Two uses sit under two different standards systems and they are not interchangeable. Used as an industrial protection layer — a glove lining, a heat pad, a thermal lining, the inner layer of a protective hood — the felt sits in the protective-clothing system and is assessed as part of the assembly it goes into. Used as the core of a sound-insulation panel in a data centre or a server room it is a building material, and the test that applies to it is ASTM E84, the surface burning characteristics of building materials.
As a panel core the felt does two jobs at once: it is the acoustic middle layer of the panel build, and because meta-aramid is inherently flame resistant it does not introduce a burning component into that build. What we supply for it is material-level data. The panel construction, the facing materials and the finished panel’s own fire classification belong to the panel maker, and the certification of a protective article belongs to the maker who builds it — in both cases built on our material data rather than replaced by it.
Who makes it
Who makes the felt
Our textile manufacturing roots go back to 1972 and the company was established in Shantou, Guangdong in 2002. The aramid used in this felt comes out of a 30,000 m² integrated plant where the fibre is spun and converted under one roof rather than bought in and resold.
This page covers one construction: AF300, a 300 g/m² meta-aramid felt for the core layer of a sound-insulation panel. We supply the felt and its material-level data; the panel build and the finished panel’s own classification belong to the panel maker, and we are glad to give you the lot data the panel maker needs to establish them.
Technical data
Product information
The meta-aramid felt we produce for sound-insulation panel cores. AF300 carries the recorded specification; where our records hold no figure we write On request rather than an estimate.
| Model | Composition | Weight | Construction / width | Rating or key property | Source |
|---|---|---|---|---|---|
| AF300 | 100% meta-aramid (aramid 1313) | 300 g/m² | Nonwoven felt; roll width on request | ASTM E84 Class A — surface burning characteristics (building-material test, not a PPE standard) | Product record · standards matrix |
Meta-aramid felt for sound-insulation panel cores
The Source column names where each figure comes from: Product record is the specification held for this model in our own product records. ASTM E84 is a building-material test for surface burning characteristics — it is not a protective-clothing standard, and it is not a garment certification. The class also covers laminated variants; no figure is recorded for those, so none is printed here. Where our records hold no figure we write On request rather than an estimate.
Made to order
Specification options
AF300 is the recorded construction for this felt — 300 g/m², nonwoven. Tell us the panel build the felt is going into and the roll form your line runs, and we will confirm the specification and the material data that fit it.
Standards and certification
This felt is supplied on material-level data. The entries below are the ones that apply to it in the application it is bought for; ASTM E84 is a building-material test and is marked as such.
- ASTM E84 Surface burning characteristics of building materials. Class A is recorded for this felt, which is the classification a sound-insulation panel core is bought against. This is a building-material test, not a PPE standard.
- ISO 9001 Quality management system.
- REACH SVHC Declaration available on request for the article supplied.
The felt is a nonwoven component, not a finished protective article, so no garment-level standard is claimed for it. Where the felt is used as a protective lining or a hood inner layer, the assessment belongs to the assembly it goes into; where it is used as a panel core, the finished panel’s own fire classification belongs to the panel maker. Test reports and certificate copies are available from our sales team on request, and where a standard-referenced result is required for your own approval file we arrange testing to the customer's requirement.
Frequently asked questions
What is the acoustic felt for?
It is the core layer of a sound-insulation panel — the middle layer of the panel build, used in data centres, server rooms and similar plant rooms where a rack or a room has to be kept quiet. The felt carries the acoustic and thermal job of that panel, and because meta-aramid is inherently flame resistant it does not add a burning component to the build. It is bought as a component for a panel, not as a finished panel and not as a garment.
Is the felt flame resistant, and what makes it so?
Yes, inherently. The flame resistance is a property of the meta-aramid polymer rather than a finish applied to the felt, so it cannot be washed out, worn off or removed by handling. The fibre does not melt or drip; it chars and builds a carbonised barrier. Its limiting oxygen index is 28–32 against the 21% oxygen in ordinary air, so it self-extinguishes once the ignition source is removed. Meta-aramid is used continuously at around 250 °C and only begins to decompose above 370 °C.
Is ASTM E84 a protective-clothing standard?
No, and we are careful to say so. ASTM E84 is the standard test for the surface burning characteristics of building materials, and it reports a class — A, B or C. It applies to this felt because the felt is bought as the core of a building panel, and it states nothing about protective clothing. Felt used as a protective lining is assessed through the protective-clothing route instead, as a component of the assembly it goes into.
Can the felt be used as a protective lining or a hood inner layer?
Yes. Aramid felt is used as a glove lining, a heat pad, a thermal lining and the inner layer of a protective hood, and in that role it is assessed as a component of the assembly it goes into. What we supply for any of those uses is material-level data: composition, weight and the fibre properties of the lot. The assessment of the finished article, and its certification, belong to the maker who builds it.
What weight is the felt, and can the roll be set to our panel line?
AF300 is the recorded construction: a 300 g/m² nonwoven meta-aramid felt. Roll width and roll length are set with the order against the panel line the felt is cut on, so tell us the panel build and the roll form you run and we will confirm the specification and the material data for it. The class also covers laminated variants; we hold no recorded figure for those, so none is printed on this page.
How do I verify the material data before ordering?
Ask for the test report for the production lot. Composition, weight and the fibre data are recorded per lot, and the ASTM E84 classification is the building-material surface burning result held for this felt. Where your own approval file needs an independent result, third-party test reports can be provided on request, and where a standard-referenced result is required we arrange testing to the customer's requirement.
Let’s talk about your fabric requirements
Tell us the application, the required weight and the standard you need to meet. Our technical team will come back with a matching fabric, the spec sheet and a quotation.