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What materials are needed to produce disposable masks?

What materials are needed to produce disposable masks? The list of materials required for masks is as follows:
 
SS non-woven dark - for outer layer
 
1. Material weight 25 g / m2
 
2. Material width 200 mm
 
3. Cutting length of each piece: 175mm
 
4. Single gram weight 0.875g
 
Remarks: green, blue, black, etc
 
 
White melt blown non-woven fabric filter layer
 
1. Weight of material: 22G / m2
 
2. Material width 180mm
 
3. Cutting length of each piece: 175mm
 
4. Single gram weight 0.693g
 
Note: filter index 90%, 95%, 99.99% can be selected according to the production requirements of the enterprise, and 175mm wide can also be used
 
SS non woven light or white - for inner layer
 
1. Material weight 25 g / m2
 
2. Material width 210mm
 
3. Cutting length of each piece: 175mm
 
Single piece weight 0.91875g
 
Bridge of nose
 
1. Cutting length of each piece: 100mm
 
Note: it's made of plastic or iron. It's recommended to use plastic containing iron wire, which is quite strong
 
Elastic ear band
 
1. Cutting length of each piece: 300mm
 
Remark: single side 150 mm * 2 sides = 300 mm

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