1, from the performance point of view:
Accuracy, flow rate, air permeability pressure difference, filtration efficiency and other parameters are compared. After testing and testing, imported glass fiber must be far better than domestic glass fiber.
2, from the price point:
Domestic glass fiber costs about 70 yuan for a kilogram, and 300 yuan for a kilogram of imported glass fiber.
3, from the structure:
Imported glass fiber is pure glass fiber extraction, texture fragile, so add a layer of tea oil inside and outside, so the color is a bit yellow, and domestic glass fiber is synthetic, relatively white.
4, from the appearance of:
Imported glass fiber: It is composed of two layers of non-woven fiber glass fiber filaments superimposed, structured, thin filter layer is easy to break the oil in the water.
Accuracy is generally 1-25 microns
Domestic glass fiber: It is composed of two layers of non-woven three-layer glass fiber filaments, and the layer is not obvious. The thickness of the filter layer is not easy to break the water in the oil.
Accuracy is generally between 1-100 microns
Therefore, when you purchase a glass fiber filter, you need to carefully select the domestic glass fiber and imported glass fiber because of different quality and process.