In just two years from 2019 to 2022, the new crown epidemic has become the most familiar word to us. We are used to doing our homework on epidemic prevention policies and preparing nucleic acid tests before we travel far, and the test report turns into an important proof of travel with the same status as an ID card. I can't count the number of times my throat has been stabbed with a long, thin stick, the number of times I've dry-heaved, and my throat has become calloused. And these "stick" is our protagonist today - nucleic acid test swabs.
How to use disposable sampling swabs
We all know that the sterile swab is used to collect human DNA samples, but the specific operation is not as simple as we see, so how to use this sterile swab? The following Shenzhen medi biological take you to understand it!
Disposable sterile swab how to use
(1) first open the swab package, carefully remove the swab, pay attention to the sample before not to touch anything to avoid contamination.
(2) put the swab into the place to be sampled, by staying, rotating or wiping for sampling
(3) gently remove the swab, usually put the swab into the virus collection tube, remove the end of the sampling swab after breaking at the fracture, tighten the cap and remove it quickly for inspection.
I. What is a nucleic acid detection swab?
Nucleic acid sampling swabs, or flocked swabs, use nylon microfiber as the head material. The small brush-like shape is ideal for quickly absorbing fluid samples from irregular surfaces and can thoroughly release the collected sample into the culture fluid, and the soft bristles can also reduce the discomfort of the sampled person. The handle of the sampling swab is generally made of polystyrene (or ABS) with a break point designed in the middle for easy fracture to put into the sealed bottle.
The material of raw material of nucleic acid testing swab
▲ swab full stick
▲ Flocking head flocking: PA short flock (nylon short flock) or PET short flock (polyester short flock) flocking adhesive: flocking adhesive (polyacrylate emulsion adhesive) sampling rod material: HIPS (high impact polystyrene)
Three, the production process video
▲Swab stick fast injection production in the machine
▲Sampling swab electrostatic flocking (electrostatic generator)
▲Sampling swab flocking and drying production line
▲Nucleic acid testing sampling swab packing equipment production process: injection molding --- dipping flocking glue --- centrifugal dumping glue --- box electrostatic flocking --- baking --- finishing --- inspection --- disinfection and packaging first through automatic injection molding machine injection swab stick, the swab stick installed on the bracket, impregnated flocking glue centrifugal dumping excess glue, put into the flocking box for flocking, and then drying in the drying channel, after drying finishing inspection. Finally disinfection and packaging into nucleic acid sampling swab products.
Four, electrostatic flocking principle
▲ Simulation of electrostatic flocking experimental principle: the principle of electrostatic flocking is to use the physical property that charges are repulsive to each other and opposites attract to each other, so that the lint is negatively charged, and the object to be flocked is placed at zero potential or grounded, and the lint is attracted by the plant body with different potential and accelerates vertically to the surface of the object to be flocked, and as the plant body is coated with adhesive, the lint is stuck vertically to the plant body. Flocking is a new production process that takes advantage of the natural characteristics of electric charge.
Box flocking process: make a flocking box according to the size and shape of the flocked product, place the flock in the box, turn on the power, so that a high-voltage electric field is formed in the flocking box, the flocked product is sent into the box from one end of the flocking box, and after three to five seconds, the flocked product is removed from the other end of the box after the flocking is completed, and dried or dried to be the finished product.
