Membranes can be used everywhere, and syringe filter membrane is also widely used. For example, the filter membrane on the liquid line during intravenous drip, the breathable membrane on the urine bag to balance the internal and external pressure, the gas exchange membrane in the artificial heart-lung machine, the dialysis membrane used during kidney dialysis, the isolation membrane mesh used to repair atrial defects, and the prevention of intestinal obstruction after abdominal surgery. Anti-stick film, etc. These films use films. In order to achieve the purpose of use, they have different specifications for film hole size, mechanical strength, etc. The requirements for pore diameter, hole spacing and burrs are quite strict. In order to balance the pressure inside and outside the container, many products must be ventilated but impermeable. For example, when applying intravenous drip, the pressure in the bottle will continue to decrease as liquid is continuously injected into the body. If there is no injection of external gas, the pressure inside the bottle will be too low and the drip cannot drip out. Therefore, it is common for caregivers to insert a needle with a breathable but impermeable film at the end of the rubber at the bottom of the bottle, allowing outside air to enter the bottle without the liquid inside the bottle leaking out.
Since outside air may contain germs, the film must be able to block the intrusion of microorganisms, and the size of the holes in the film must be controlled within Around 0.2 micron. In addition, in order to meet the requirements of ventilation but impermeability, most of these membranes use hydrophobic materials, such as polypropylene or Teflon.
The syringe filter membrane currently independently developed and produced is made of polytetrafluoroethylene fine powder as raw material, which is mixed, pushed and calendered. , a microporous filter membrane made by a special biaxial stretching process, with pore sizes of 0.1 μm, 0.22 μm, 0.45 μm, and 1 μm. The pore size is adjustable. Syringe filter membrane can ensure that all small bacteria and particles are trapped. The size and uniform distribution of the membrane pore size are crucial. When the pore size of the membrane is smaller, the bubble point value of the membrane will be higher. The higher, the better the interception effect. Interested parties are welcome to enter the store for consultation.
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