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Product ID：carbon-nonwoven-filterActivated Carbon Chemical FiltersActivated Carbon Chemical Filters

Activated Carbon Chemical Filters

Activated Carbon Non-Woven Filter

Q: Does thicker carbon non-woven always remove more odor?

Not necessarily. Thickness mainly sets dust-holding capacity and pressure drop; odor capacity is set by carbon content per square metre. On this page, the 10 mm standard grade PF10-1.25-30-AC carries about 104 g/m² of carbon, less than the 5 mm PF5-1.25-50-AC (about 143 g/m²), while the 10 mm high-carbon PF10-1.25-30-AC-HC carries about 191 g/m² and adsorbs roughly 60% more butane than the standard grade. When comparing suppliers, write "carbon content in g/m²" into the specification, otherwise it is easy to buy media that is thick but light on carbon.

Q: Can carbon non-woven be washed or sun-dried and reused?

Not recommended. Washing flushes out the carbon bonded to the fibres and leaves water in the micropores; even after drying, capacity never returns to that of new media. Sunlight only releases a small amount of surface odor and does not actually empty the pores. True regeneration of activated carbon needs heat treatment at several hundred degrees, which the PET fibres cannot survive, and the reaction in impregnated grades is irreversible. The economical approach is a washable pre-filter in front to stop dust, so the carbon layer only handles odor and lasts longer.

Q: How often should it be replaced, and how do I know when?

Saturated carbon looks the same and its pressure drop barely changes, so judge by whether odor has returned. Purifiers and air conditioners in homes and offices are typically changed every 3–6 months; kitchens, pets, smoking or freshly renovated spaces may saturate in 1–2 months. If relative humidity stays above 70%, water vapor competes for pore sites and life shortens noticeably. If the equipment has a TVOC or odor sensor, replace when readings stay high; otherwise replace when odor can be smelled at the outlet again.

Q: Can I buy full rolls and cut them myself? What is the minimum order?

Yes. Standard rolls are 1.25 m wide, 50 m long for 3 mm and 5 mm and 30 m long for 10 mm, and can be cut with a utility knife or fabric cutter — useful for customers with their own converting line or many different sizes. If you need less than a roll, or discs, custom shapes, or finished cardboard / aluminium framed pleated filters, we can cut and ship to your drawing. Impregnated grades (acid, alkaline, formaldehyde) and 15 mm are made to order with minimums set by specification; please include size, quantity, target gas and desired carbon content when requesting a quote.

Product Overview

Activated carbon non-woven filter media (also called carbon filter fabric or carbon felt) is a sheet media in which coconut-shell activated carbon powder is bonded between polyester (PET) non-woven fibres, so one layer does two jobs: the fibres catch coarse dust and the carbon adsorbs odors and VOCs. Standard grades come in 3, 5 and 10 mm thickness with about 67–241 g/m² of carbon on 1.25 m wide rolls, supplied by the roll, cut to size or made into pleated filters. It is used in air purifiers, dehumidifiers, air conditioners, range hoods, HVAC units and waste-bin odor control; chemically impregnated grades are available for acid gases, alkaline gases and formaldehyde.

Key Specifications

Adsorbent: Coconut-shell activated carbon powder (acid-gas, alkaline-gas and formaldehyde impregnated grades available)
Adsorbent Weight: 67–241 g/m²
Depth: 3 / 5 / 10 / 15 mm (±10%)
Custom Sizes: Supplied on 1.25 m wide rolls, or cut, die-cut or converted into pleated filters

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Specifications

Adsorbent: Coconut-shell activated carbon powder (acid-gas, alkaline-gas and formaldehyde impregnated grades available)
Filter Media: Polyester (PET) non-woven
Structure: Three-layer composite: PET face / activated carbon / PET base
Target Gases: Odors, VOCs and solvent vapors, tobacco smoke and cooking fumes; impregnated grades also remove acid / alkaline gases and formaldehyde
Adsorbent Weight: 67–241 g/m²
Basis Weight: 188–478 g/m²
Removal Efficiency: PM2.5 count efficiency approx. 38–63% (face velocity 0.15 m/s, by grade)
Depth: 3 / 5 / 10 / 15 mm (±10%)
Custom Sizes: Supplied on 1.25 m wide rolls, or cut, die-cut or converted into pleated filters
Max. Operating Temperature: ≤ 60°C
Max. Relative Humidity: ≤ 80% RH
Service Life: Depends on odor concentration at site; typically 3–6 months indoors
Applications: Air purifiers, dehumidifiers, air conditioners, range hoods, building HVAC, and waste-bin odor control
Packaging: Rolls (50 m per roll for 3 / 5 mm, 30 m for 10 mm) or cut pieces

Some values are typical ranges for this product class; the shipped datasheet governs.

Standard grades and typical properties

Grade	Thickness	Basis weight	Carbon content	Butane adsorption	Particle efficiency (PM2.5)	Standard roll
PF3-1.25-50-AC	3 mm	188 g/m²	67 g/m²	28 g/m²	≥ 38%	1.25 m × 50 m
PF5-1.25-50-AC	5 mm	312 g/m²	143 g/m²	52 g/m²	≥ 48%	1.25 m × 50 m
PF10-1.25-30-AC	10 mm	288 g/m²	104 g/m²	40 g/m²	≥ 57%	1.25 m × 30 m
PF10-1.25-30-AC-HC	10 mm	418 g/m²	191 g/m²	64 g/m²	≥ 63%	1.25 m × 30 m
PF15-1.25-20-AC *	15 mm	478 g/m²	241 g/m²	84 g/m²	≥ 63%	1.25 m × 20 m

Particle efficiency is PM2.5 count efficiency at 0.15 m/s face velocity; butane adsorption indicates the saturation capacity of the carbon layer. * PF15-1.25-20-AC is made to order. Rolls can also be slit to 1.0 / 1.2 / 1.5 m widths.

Model Reference

Model	Description	Size
PF5-595-595-AC	Activated carbon non-woven filter 595X595X5mm	595 × 595 × 5 mm
PF10-430-660-AC	Activated carbon non-woven filter 430X660X10mm	430 × 660 × 10 mm
PF3-380-2000-AC	Activated carbon non-woven filter 380X2000X3mm	380 × 2000 × 3 mm
PF3-600-600-AC	Activated carbon non-woven filter 600X600X3mm	600 × 600 × 3 mm
PF5-400-1250-AC	Activated carbon non-woven filter 400X1250X5mm	400 × 1250 × 5 mm
PF10-383-482	Activated carbon non-woven filter 383x482x10mm	383 × 482 × 10 mm
PF5-500-500-AC	Activated carbon non-woven filter 500X500X5mm	500 × 500 × 5 mm
PF3-320-320-AC	Activated carbon non-woven filter 320X320X3mm	320 × 320 × 3 mm

Common sizes are listed above. Other sizes, frame materials and efficiency grades can be made to order — please quote the model or size when requesting a quotation.

Detailed Description

What is activated carbon non-woven filter media

Activated carbon non-woven media, also sold as carbon filter fabric, carbon felt or carbon foam sheet, is a "two-in-one" sheet media. Its backbone is a polyester (PET) non-woven, and a layer of coconut-shell activated carbon powder is bonded between the fibres. As air passes through, the fibres stop hair, lint and 3–10 µm coarse dust, while the carbon adsorbs odor molecules and volatile organic compounds (VOCs). Its strengths are that it is thin, light, low in pressure drop and easy to convert: it can be cut from the roll, die-cut, pleated, or stacked behind a HEPA or pre-filter. The "black layer" inside most home appliances and air conditioners is this material. The trade-off is limited carbon per square metre (tens to a little over two hundred grams), so it suits indoor, low-concentration odor control. For high-concentration duties such as wastewater plants or process exhaust, a packed-bed or honeycomb carbon filter with tens of times more carbon is the right choice. Activated carbon non-woven supplied as rolls, cut sheets in several thicknesses, and a cut edge (illustration)

Activated carbon non-woven supplied as rolls, cut sheets in several thicknesses, and a cut edge (illustration)

Three-layer structure and how adsorption works

Three-layer structure of carbon non-woven

Air flows top to bottom; the right side magnifies the pores of one carbon grain

1PET face layer—Catches coarse dust, protects the carbon
2Activated carbon layer—Coconut carbon bonded between fibres
3PET base layer—Supports the sheet, holds carbon dust in

Schematic; layer proportions exaggerated. Pore classes follow IUPAC definitions.

The face layer sits on the air-inlet side and catches dust first, so particles do not coat the carbon and block its pores. The carbon layer is where adsorption happens. The pores of coconut-shell carbon run from macropores (>50 nm) through mesopores (2–50 nm) to micropores (<2 nm). Gas molecules diffuse to the grain surface, travel inward through the macro- and mesopores, and are finally trapped in micropores close to their own size. Most odor molecules are only 0.3–1 nm across, right in the micropore range, which is why micropore-rich coconut carbon deodorizes so well. The base layer on the outlet side supports the sheet and keeps carbon dust from being carried downstream. Plain activated carbon works by physical adsorption (van der Waals forces at the pore wall), which is effective for VOCs and most odors. Small, polar molecules such as ammonia, hydrogen sulfide and formaldehyde are held only weakly, so the carbon is impregnated with a reagent that reacts with and fixes the contaminant — the chemically impregnated grades below.

Carbon content, not thickness, drives odor capacity

Carbon content vs butane adsorption

Same 10 mm: twice the carbon, about 60% more adsorption

Typical values per grade; larger dots are thicker media. Odor capacity follows carbon content, not thickness.

The most common mistake when choosing carbon non-woven is assuming "thicker means better odor removal". Thickness mainly affects dust-holding capacity and pressure drop; what decides how much odor the media can take up is carbon content (g/m²). At the same 10 mm, the high-carbon PF10-1.25-30-AC-HC carries almost twice the carbon of the standard PF10-1.25-30-AC and adsorbs about 60% more butane, while the 5 mm PF5-1.25-50-AC actually holds more carbon than the 10 mm standard grade. When comparing quotes, align on carbon content per square metre, not just thickness.

Standard and chemically impregnated grades

Type	Carbon treatment	Main targets	Typical use
Standard coconut carbon	Not impregnated, physical adsorption	VOCs, solvent odor, tobacco smoke, cooking fumes, pet and garbage odors	Air purifiers, air conditioners, dehumidifiers, HVAC return air
Acid-gas grade	Alkaline impregnant	Hydrogen sulfide, sulfur dioxide, hydrogen chloride, hydrogen fluoride, chlorine, nitrogen dioxide	Air intakes near wastewater or chemical sites, fab make-up air
Alkaline-gas grade	Acidic impregnant	Ammonia, amines, NMP	Restroom and livestock odors, around electronics processes
Formaldehyde grade	Formaldehyde-specific impregnant	Formaldehyde, low-molecular aldehydes	Newly renovated interiors, furniture and board storage

The reaction in impregnated grades is irreversible: once the reagent is consumed the media is spent and cannot be regenerated. Impregnated grades are made to order and quoted by target gas, thickness and quantity.

Choosing thickness by application

Thickness	Typical grade	Equipment and setting	Selection notes
3 mm	PF3-1.25-50-AC	Compact purifier composite filters, AC front panels, waste-bin and refrigerator deodorizers	Thinnest, easiest to pleat and die-cut; first choice where space is tight
5 mm	PF5-1.25-50-AC	Air purifiers, dehumidifiers, range hoods, HVAC return grilles	Best balance of carbon and thickness; the highest-volume grade
10 mm	PF10-1.25-30-AC / PF10-1.25-30-AC-HC	Air handling units, fan inlets, office and restaurant odor control	High dust-holding capacity; choose high-carbon for heavier odors
15 mm	PF15-1.25-20-AC (made to order)	HVAC sections with heavy odor load that still need low pressure drop	Highest carbon of any sheet grade; beyond this, move to a packed-bed filter

The standard roll width is 1.25 m and the media can be cut to squares, discs or custom shapes from a drawing. Where a frame is needed, it can be made into a cardboard- or aluminium-framed pleated carbon filter; pleating multiplies the filtration area several times for lower pressure drop and longer life.

Replacement interval and handling

The life of carbon non-woven is judged by "has the odor come back", not by pressure drop: saturated carbon looks the same, but odor slowly reappears at the outlet. Typical homes and offices replace it every 3–6 months; kitchens, pets, smoking or newly renovated spaces may need 1–2 months. If relative humidity stays above 70%, water vapor occupies the pores and life shortens noticeably. Do not wash it: water flushes the carbon powder out and fills the pores, and the media never recovers its original capacity after drying. Sunlight only releases a little surface odor and does not truly regenerate the carbon. If the surface is coated with dust, a pre-filter is missing upstream; adding one makes the carbon layer last much longer.

Common applications

Odor filters for air purifiers, dehumidifiers, air conditioners and energy recovery ventilators; the front stage of range hoods and restaurant exhaust; return-air odor control in building AHUs and fans; waste bins, refrigerators, shoe cabinets and pet products; general odor control in electronics plants, laboratories and hospitals; and as the carbon layer for face masks and automotive cabin filters.

Frequently Asked Questions

Does thicker carbon non-woven always remove more odor?

Not necessarily. Thickness mainly sets dust-holding capacity and pressure drop; odor capacity is set by carbon content per square metre. On this page, the 10 mm standard grade PF10-1.25-30-AC carries about 104 g/m² of carbon, less than the 5 mm PF5-1.25-50-AC (about 143 g/m²), while the 10 mm high-carbon PF10-1.25-30-AC-HC carries about 191 g/m² and adsorbs roughly 60% more butane than the standard grade. When comparing suppliers, write "carbon content in g/m²" into the specification, otherwise it is easy to buy media that is thick but light on carbon.

Can carbon non-woven be washed or sun-dried and reused?

Not recommended. Washing flushes out the carbon bonded to the fibres and leaves water in the micropores; even after drying, capacity never returns to that of new media. Sunlight only releases a small amount of surface odor and does not actually empty the pores. True regeneration of activated carbon needs heat treatment at several hundred degrees, which the PET fibres cannot survive, and the reaction in impregnated grades is irreversible. The economical approach is a washable pre-filter in front to stop dust, so the carbon layer only handles odor and lasts longer.

How often should it be replaced, and how do I know when?

Saturated carbon looks the same and its pressure drop barely changes, so judge by whether odor has returned. Purifiers and air conditioners in homes and offices are typically changed every 3–6 months; kitchens, pets, smoking or freshly renovated spaces may saturate in 1–2 months. If relative humidity stays above 70%, water vapor competes for pore sites and life shortens noticeably. If the equipment has a TVOC or odor sensor, replace when readings stay high; otherwise replace when odor can be smelled at the outlet again.

Can I buy full rolls and cut them myself? What is the minimum order?

Yes. Standard rolls are 1.25 m wide, 50 m long for 3 mm and 5 mm and 30 m long for 10 mm, and can be cut with a utility knife or fabric cutter — useful for customers with their own converting line or many different sizes. If you need less than a roll, or discs, custom shapes, or finished cardboard / aluminium framed pleated filters, we can cut and ship to your drawing. Impregnated grades (acid, alkaline, formaldehyde) and 15 mm are made to order with minimums set by specification; please include size, quantity, target gas and desired carbon content when requesting a quote.