maintenance-free anti-fog respirator

maintenance-free anti-fog respirator

  • CN 101,668,444 A
  • Filed: 03/26/2008
  • Published: 03/10/2010
  • Est. Priority Date: 05/03/2007
  • Status: Active Application
First Claim
Patent Images

1. Maintenance-free respirator, it comprises:

  • (a) band tool;

    With(b) mask body, comprise sunk area and a filtration zone, and has at least one non-woven webs, described at least one non-woven webs comprises filter course, at least a portion of the described sunk area of wherein said mask body has made its inherent structure obtain changing, significantly to be increased in the pressure drop of whole described sunk area, the increase of described pressure drop is in described sunk area described mask body not to be added under the condition of extra material or items, changes realization by the described inherent structure to described at least one non-woven webs.

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