Processo para carregar um lençol não tecido de microfibras termoplásticas meio de filtro de eletreto máscara de filtragem elástica e conjunto de máscara respiradora

摘要

A method of charging a nonwoven web of thermoplastic microfibers to provide electret filter media is provided. The method includes impinging on a nonwoven web of thermoplastic nonconductive microfibers capable of having a high quantity of trapped charge jets of water or a stream of water droplets at a pressure sufficient to provide the web with filtration enhancing electret charge and drying said web.