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N-PTFE Nanoscale surgical mask

Medical nano anti-bacterial mask also includes outer layer, middle layer, inner layer, ear hook, nose clip and other parts. The special feature of the nanomask is that the middle layer is composed of a nano-film with a smaller aperture (100-200 nm), which

Medical nano anti-bacterial mask also includes outer layer, middle layer, inner layer, ear hook, nose clip and other parts. The special feature of the nanomask is that the middle layer is composed of a nano-film with a smaller aperture (100-200 nm), which is generally made of PTFE material.


The PTFE film prepared by unidirectional or bidirectional tensile method has a spiderweb microporous structure on its surface, and has very complex changes in three-dimensional structure, such as network connection, hole setting, hole bending, etc., so it has excellent surface filtration function. Nano-mask made of this material has the characteristics of high barrier efficiency, long service life, thin and breathable, which is the new direction of mask development in the future.


《GB 19083-2010医用防护口罩技术要求》Testing requirements:

1、 Basic requirements for masks:

Mask should cover the wearer's mouth and nose, should have good facial tightness, the surface must not have holes, stains, no breathing valve。 

2、 Nose clip:

1)   The mask should be fitted with a nose clip

2)   The nose clip should be adjustable。

3、 Masks with:

1)   Mask straps should be adjusted easily。

2)  The position of the mask should be fixed with sufficient strength. The breaking force of the connection point between each mask belt and the mask body should be no less than 10N

4、 Filtration efficiency:

In the case of gas flow of 85L/min, the filtration efficiency of the mask for non-oily particles should meet the requirements in the following table。

Filtration efficiency class

level

Filtration efficiency(%)

Level 1

≥95

Level 2

≥99

Level 3

≥99.97

       5、 Air resistance:

For air flow of 85L/min, the inspiratory resistance of the mask should not exceed 343.2pa (35mm H2O)。

6、 Synthetic blood penetration:

After spraying 2ml of synthetic blood at a pressure of 10.7kpa (80mmHg) to the outer side of the mask, no infiltration should occur to the inner side of the mask。

7、 Surface moisture resistance:

Mask surface water registration should not be lower than GB/T 4745-1997 level 3。

8、 Microbiological index:

1) The mask should meet the requirements of the microbiological indicators in GB 15979-2002, as shown in the following table

Microbiological index of mask

Total number of bacterial coloniesCFU/g

Fecal coliform

Pseudomonas aeruginosa

Staphylococcus aureus

Hemolytic streptococcus

Total number of fungal coloniesCFU/g

≤100

May not be detected

May not be detected

May not be detected

May not be detected

≤100

2)  Masks marked sterilized or sterile should be sterile

9、 Residual ethylene oxide:

For sterilized masks, the residue of ethylene oxide should not exceed10ug/g。

10、     Flame retardant performance:

The materials used should not be inflammable and the duration of secondary combustion should not exceed5s。

11、      Skin irritation:

The score for primary irritation of mask material should not exceed1。

12、     And sex:

Mask design should provide good tightness, mask fit factor should not be less than100。





N-PTFE Nanoscale surgical mask
Medical nano anti-bacterial mask also includes outer layer, middle layer, inner layer, ear hook, nose clip and other parts. The special feature of the nanomask is that the middle layer is composed of a nano-film with a smaller aperture (100-200 nm), which
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N-PTFE Nanoscale surgical mask

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