Disposable medical masks belong to Class II medical devices. The production of masks has high requirements on equipment, production environment and personnel. The entire production process of masks needs to be in a 100,000-class dust-free clean room (diameter per cubic meter of air ≥ The number of 0.5μm particles is not more than 3.52 million. The less the number of particles in the air, the less the number of dust and microorganisms, the cleaner the air). Whether the mask production workshop meets the dust-free and clean requirements will directly determine whether the masks produced meet the specified requirements.

1. Mask structure

Outer non-woven fabric, middle meltblown fabric, inner non-woven fabric, nose clip, ear hook thread

2. Raw materials

1. PP non-woven fabric; 2. Melt blown fabric; 3. Nose bridge strip; 4. Ear straps and other materials.

3. Production equipment

The production of masks is generally fully automatic or semi-automatic. Fully-automatic equipment includes fully-automatic flat mask machine, fully-automatic folding mask machine, etc. Fully automatic equipment is more expensive. Semi-automatic equipment includes mask forming machine, mask pressing machine, mask trimming machine, breathing valve punching machine (if breathing valve), nose bridge line fitting machine, ear strap spot welding machine, breathing valve welding machine (if any Breathing valve), generally speaking, the whole set is about 500,000 yuan. However, the current mask production equipment is out of stock, and the price has risen sharply, and the delivery time is about 60 days.

1. Mask filming machine; 2. Mask ear strap spot welding machine; 3. Mask packaging machine.

3. Process flow

The production process of the mask can be completed by threading the fabric, cutting the nose bridge, folding and pressing, and pressing the edge.

Fabric on-line: Put the prepared mask fabric on the production machine and stack them together. Ensure that the ventilation resistance is not too large, so as not to affect normal breathing, and ensure that the filtration efficiency meets the standard.

Nose bridge clip: To make the mask fit better with the nose, it is necessary to cut the mask and configure the nose bridge. When in use, press the nose clip to make a good fit curve between the mask and the nose, and ensure that the mask can better maintain the airtightness.

Folding and pressing: The mask is gradually narrowed by the machine, and the "folding structure" is gathered. On the one hand, the cross-section of the mask is reduced, and on the other hand, there is room for it to open. After folding, it needs to be pressed to make the surface of the mask more smooth.

Edge pressing: After the mask is folded and pressed, the edges of the mask must be pressed together to complete the flat mask surface.

Disinfection and sterilization: fragile non-woven fabrics generally do not need to be sterilized by high temperature. The colorless gas "ethylene oxide" is used to kill bacteria, molds and fungi.