Detail of YY/T 0691-2008

Introduction of YY/T 0691-2008

Clothing for protection against infectious agents - Medical face masks - Test method for resistance against penetration by synthetic blood (fixed volume, horizontally projected) 1 Scope This standard describes a laboratory test method for measuring the resistance of medical face masks to penetration by a splash of synthetic blood. This standard primarily addresses the performance of materials or certain material constructions used in medical face masks. This standard does not address the performance of the medical face mask's design, construction, interfaces or other factors which may affect the overall protection offered by the medical face mask and its operation (such as filtration efficiency and pressure drop). This test method does not address breathability of the medical face mask materials or any other properties affecting the ease of breathing through the medical face mask. This test method evaluates the protective performance of medical masks, but it does not evaluate the performance of medical face masks as a protection against contamination via airborne exposure pathways or in the prevention of the penetration of aerosolized body fluids deposited on the medical face mask. 2 Normative references The following normative documents contain provisions which, through reference in this text, constitute provisions of this standard. For dated references, subsequent amendments (excluding corrections), or revisions, of any of these publications do not apply to this standard. However parties to agreements based on this standard are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. GB/T 2828.1-2003 Sampling procedures for inspection by attributes - Part 1: Sampling schemes indexed by acceptance quality limit (AQL) for lot-by-lot inspection (ISO 2859-1:1999, IDT) GB/T 5549-1990 Surface active agents - Determination of surface tension by drawing up liquid films (neq ISO 304:1985) 3 Terms and definitions For the purposes of this standard, the following terms and definitions apply. 3.1 aerosolized body fluids body fluids which have been dispersed into air as very small liquid droplets 3.2 airborne exposure pathway inhalation routes of exposure to the medical face mask wearer Note: Inhalation routes of exposure do not include streams of blood or body fluid that may be expelled from a wound. 3.3 blood-borne pathogen any bacterium, virus, or other microbe carried and spread in blood or other body fluids 3.4 body fluid

Contents of YY/T 0691-2008

Foreword i Introduction ii 1 Scope 2 Normative references 3 Terms and definitions 4 Principle 5 Test apparatus and materials 6 Specimens 7 Procedure 8 Report Annex A (Normative) Formula of synthetic blood Annex B (Informative) Modification of equations for stream velocity and time of delivery Bibliography