Waterproof, moisture-permeable composite non-woven fabric able to block viruses and blood

A waterproof, moisture-permeable composite non-woven fabric able to block viruses and blood, comprising:

• a non-woven fabric, which is provided with two surfaces, and has a basic weight of ≤70 g/m2;
• a multi-layer breathable membrane, which is at least a three-layer co-extruded membrane, the basic weight of the multi-layer breathable membrane lies between 5˜30 g/m2 and is attached to one of the surfaces of the non-woven fabric;
• a powder in the multi-layer breathable membrane has a percentage by weight of 40˜60% and an extension ratio ≤300%;
• wherein,
• a synthetic blood permeability of the waterproof, moisture-permeable composite non-woven fabric able to block viruses and blood able to resist pressure of 2.0 psi sustainable for at least one minute;
• a Phi-X174 bacteriophage penetrability of the waterproof, moisture-permeable composite non-woven fabric able to block viruses and blood able to resist pressure of 2.0 psi sustainable for at least one minute,
• a moisture capacity of the waterproof, moisture-permeable composite non-woven fabric able to block viruses and blood ≥1500 g/m2·24 hr;
• and the average grain diameter of the powder in the multi-layer breathable membrane lies between 0.5˜3 μm, with calcium carbonate (CaCO3) being used as the powder.