China The Outer Layer of Disposable Surgical Masks Is Blue Flat

The outer layer of disposable surgical masks is blue and flat
Surgical masks, surgical masks, are worn by medical personnel during invasive procedures to provide protection against transmission of blood, body fluids and spatters to both patients undergoing treatment and medical personnel performing invasive procedures.
In our current medical equipment management system, medical surgical masks belong to class II medical devices, manufacturers should have medical equipment production license, the product should have medical equipment product registration certificate, must conform to the pharmaceutical industry standards (YY), 0469-2011, in the mask of packaging and use of notes, do clear instructions on the product category.
Standard of medical surgical masks have requirement for synthetic blood penetrating (water proof permeability can be as simple as inhibitor), three layers: the outer has water-blocking effect, can prevent droplets into a mask, and the medical environment using a mask is the main reason of the isolated bacteria, and once the bacteria attached on the surface gas mask, very easy to follow and wet mask directly penetrate the mask inside, so the block water infiltration prevention is very important!
(Throughout the whole GB2626 standard, there is no impermeable requirement, so only the mask in accordance with GB2626 standard, because there is no guarantee that the mask will not be permeable by liquid, can not be used for medical operations, especially tracheotomy, endotracheal intubation and other high-risk operations that may splash);
The middle layer has filtering effect;
The inner absorbent layer near the nose and mouth is used for moisture absorption.
Medical surgical masks closed: generally, filtering particle types: non oily (Nacl) aerosol particles, particles of filtration efficiency (PFE) : 30% or higher, bacteria filtration efficiency (BFE) : not less than 95%, the highest (120 MMHG), hemodialysis is requested main consideration, at the time of surgery patient blood spatter, characteristics of appearance: outer blue, flat type (similar to medical disposable masks appearance).

Surgical masks shall comply with The Technical Requirements for Medical Surgical Masks issued by YY 0469-2011, a national medical industry standard. The main technical indicators are as follows:
(1) Filtration efficiency: The filtration efficiency of the aerodynamic median diameter (0.24±0.06) m sodium chloride aerosol was not less than 30% under the condition of air flow rate (30±2) L/min.
(2) Bacterial filtration efficiency: Under the specified conditions, the filtration efficiency of staphylococcus aureus aerosol with the average particle diameter of (3±0.3) m was not less than 95%;
(3) Respiratory resistance: Under the filtration efficiency flow condition, the inspiratory resistance does not exceed 49Pa and the expiratory resistance does not exceed 29.4Pa;
(4) Penetration of synthetic blood: After 2ml of synthetic blood is sprayed onto the outer side of the mask at a pressure of 16.0kPa (120mmHg), no penetration should occur on the inner side of the mask.
Domestic and international standards for medical surgical masks do not require the tightness between the mask and the face of the wearer, because medical surgical masks are not used to prevent airborne diseases and do not provide respiratory protection to the wearer, which is the main difference between them and medical protective masks.
Identification key points of surgical masks:
1. Domestic surgical masks must meet the domestic medical industry standard YY 0469-2011 (printed on each separate package);
2. Level 2 or Level 3 (also level moderate, level high) according to ASTM F2100-11;
3. The test under European standard EN 14683 meets Type IR or Type IIR;
4. For other small language areas, please pay attention to: filter level & GT;
= 95%;
At the same time, fluid resistance against blood and droplet, the parameter & GT;
= 120mmHg (which can be found in the outsourcing by the unit of the data).