It is important to consider more than just dust when selecting a respirator for working with medium-density fibreboard (MDF). While a P3 filter may be the go-to for other woods, protection requirements for using power tools to cut, sand and drill MDF can vary.
Hard and soft woods require particulate protection to a UK Assigned Protection Factor (APF) of 20, as specified in HSE document WIS23. An FFP3 disposable respirator or half mask with P3 filters provide particulate protection to UK APF20.
MDF is made from recycled wood pressed together with adhesives, solvents, or binders. Some MDF can also contain formaldehyde. Under high temperatures, gases and vapours are given off, such as when cutting with power tools. In this application, a combined cartridge filter for protection against gas/vapours and particulates is required.
An ABP cartridge filter will offer protection against organic (A) and inorganic (B) vapours released at high temperatures and dusts (P).
An ABEK1P3 cartridge filter also offers protection against organic (A) and inorganic (B) vapours released at high temperatures and dusts (P). In addition, the cartridge protects against sulphur dioxide and acidic gases (E), as well as ammonia and organic derivatives (K).
Particulate filtering to UK APF20 level is still required in order to safely reduce wood dust exposure.
The APF of respiratory equipment is determined by the type of respirator, as well as the type and class of filters or cartridges fitted. As explained above, a half mask with P3 filters provides a UK APF of 20, but that same half mask fitted with combination cartridge filters including a P3 element (for example, ABEK1P3) provides a UK APF of 10.
Full face masks offer a higher protection factor. A full face mask provides a UK APF of 40 when fitted with P3 filters, and a UK APF of 20 when fitted with gas/vapour and P3 combination cartridge filters.
Therefore a full face mask can be required to achieve UK APF20 particulate filtering in combination with the appropriate gas/vapour protection.
To select adequate and suitable RPE, a full risk assessment should be carried out, including consulting Material Safety Data Sheets (MSDS)which detail exposure control requirements for each material.
Tight-fitting RPE, including half masks and full face masks, must be fit tested before use. Learn more about fit testing.
For more information and help to select respiratory protection products, contact the JSP Technical Helpline. Email your MSDS to technical@jspsafety.com or call +44 1993 826051