Sintered Activated Carbon Block Filter for Ozone and Odor Removal

The Thesvin sintered activated carbon block filter is a high-temperature bonded filter element that removes ozone, VOCs, formaldehyde and odour molecules from air streams. It combines a dust-holding microfiber layer with a high-iodine coconut-shell carbon core, and is designed for printers and copiers, range hoods, integrated stoves, refrigerators and similar air-handling devices. It is aimed at OEM and ODM buyers who need a stable, low-resistance filter that fits a defined cavity and seals without shedding carbon dust.

Fitment and Interface

The first thing to confirm with a sintered carbon block is not efficiency but fit. In most host devices the filter sits in a moulded pocket or behind a grille, and the air path is only as good as the interface: if the block is undersized, air bypasses it; if it is oversized, the housing distorts and the seal line opens. Thesvin builds each block to the drawing or sample supplied, so the outer dimensions, thickness and frame material are matched to the cavity rather than chosen from a catalogue. The one-piece sintered body holds its shape in service, which helps the block stay located against the housing face and keeps the airflow path predictable.

Because the carbon is fused rather than loosely packed, there is no granular movement inside the block. That matters where the filter is mounted vertically or where the device is moved: a loose fill can settle and leave a gap at the top of the frame, while a sintered block keeps a uniform carbon layer across the whole face. The anti-dust-shedding construction also protects nearby components such as print heads, fans and sensors from fine carbon particles. Frame material can be plastic, metal or paper, and the outline can be square, round or a custom shape, so the part can replace an existing cartridge without changing the host tooling.

What It Filters

The filter targets two families of contaminants. The microfiber layer captures dust and particulate matter, including PM2.5, before the air reaches the carbon. The high-iodine coconut-shell carbon then adsorbs formaldehyde, VOCs and odour molecules, and decomposes ozone generated by printers and copiers. This combined dust-and-odour duty means one element can replace a separate pre-filter and odour cartridge in some designs, freeing space inside the device.

Typical applications include fresh-air systems, vehicle cabin filters, high-end odour-removal vacuum cleaners, and domestic or commercial air purifiers. For ozone removal in printing equipment, single-pass efficiency can reach 95% or more, and the carbon iodine value can reach 1000 mg/g or above. Actual performance depends on airflow, face velocity and the operating environment, so the block can be tuned to the duty point of the host device. The low-resistance structure is intended to keep pressure drop modest and avoid adding unnecessary load to the fan.

Dimensions and Technical Data

Three Steps to the Right Part

1. Define the cavity. Send the host device model, a drawing or the old part, and note the available space, the frame material you prefer and how the element is retained. If the block must seal against a housing face, show that face in the drawing.
2. Set the duty point. Give the airflow or water flow the element will see, the expected contaminant (ozone, VOC, odour, dust), the operating temperature and humidity, and any pressure-drop limit. This lets Thesvin match carbon grade, thickness and face area to the application.
3. Confirm volume and documentation. State the annual or first-order quantity, the packaging requirement and any compliance files needed for your market. Thesvin then quotes, samples and schedules production against the agreed specification.

Delivery and Quality Assurance

Thesvin operates a 50,000 m² production site in Zhongshan, Guangdong, China, including six clean workshops totalling 20,000 m². The quality system is built around IQC, IPQC and OQC control: incoming coconut-shell carbon is checked batch by batch, in-process sintering and dimensional checks run through production, and outgoing parts are sampled before packing. Dimensional consistency is the focus of this control because a block that varies in thickness or outline will not seat correctly in the host device.

The company holds ISO 9001, ISO 14001 and ISO 45001 certification and has been IATF 16949 certified since 2024. Its in-house laboratory is CNAS-accredited and can issue test reports covering filtration efficiency, dust-holding capacity and resistance. Products meet REACH and RoHS requirements, and compliance documents can be supplied for export markets. With more than 20 years of filter development and manufacturing experience, Thesvin has built over 1,000 filtration solutions and supplies customers in Europe, the United States, Japan and South Korea. OEM/ODM support covers dimensions, structure, filter grade, frame material, logo and packaging, and multiple automated lines support monthly output in the millions of pieces.

Send Thesvin Your Drawing or Old Part

To get a quotation, send the device or vehicle model, the size or a drawing, the airflow or water flow, the operating conditions, and the quantity you expect to order. If a drawing is not available, an old part or a photo with dimensions is enough to start. Use the contact page to reach the team.