Identification through polyester filter cloth, we must first find out about polyester filter cloth several major technical indicators. Which are, density, thickness, weight, air permeability, breaking strength.
More practical in density, thickness and weight, air permeability.
1, Look at: (polyester filter cloth color) speaking, large chemical fiber polyester filter cloth white, good gloss. Small fiber polyester filter cloth dim, gray, and some such as Nomex filter felt, the color yellow. Long fiber polyester filter cloth, smooth, glossy good, spun polyester filter cloth surface with wool. (Polyester filter cloth of the lines) as well such as twill, plain weave, these lines can also help you determine the model. Because some lines of different specifications, specifications will be different.
2, And then said: The main is to determine the thickness of polyester filter cloth, preferably take a small piece weigh (grams per square meter).
3, And then burn: where polyester burning black smoke, polypropylene burn up fat glaucoma. Others are not allowed to burn, hard to say.
4, Touching: (softness) of which 208,729 staple such as plush fabrics like soft. 734,747,758,3927 are the same kinds of raw materials for weaving, but the thickness, the density is different. 3927 is very rough, firm, and not soft. Softness, roughness and samples you need to hold a little bit of touch, write it down.
Talk is about unclear. (Density) is the density of a touch, in addition to the number of what is best, 10cm with a few wires. Corresponding polyester filter cloth specification has its own density factor, just go to the control can roughly distinguish.