How can I know the thickness of the PO film I purchased? Here are a few ways to introduce you:
Method 1: This is the most direct method, that is, buy a micrometer thickness gauge, measure it yourself and it will be clear.
Method 2: Through the calculation formula can calculate the approximate thickness, first weigh out the weight of the PO film, assuming that it is 176.3 kg, what is the number of square meters originally purchased, assuming that the purchase length is 120 meters, the width is 10 meters, the width here must include the pressing edge, if it is a single pressing edge, it needs to be increased by 0.1 meters, if it is a double pressing edge, the width needs to be increased by 0.2 meters, the pressing width of each manufacturer is different, and it can be calculated according to the actual pressing width. Assuming that it is a single pressed edge, it can be calculated that the square number is 120 * (10 + 0.1) = 1212 square meters. The density of Dongda PO film is 0.97, and the density of PO film of other manufacturers may not be exactly the same, according to the actual situation, consult the dealer or manufacturer. In this way, the approximate thickness can be calculated as 176.3÷1212÷ 0.97 = 0.149 mm, that is, a 15-filament thick PO film. 1 filament is equal to 0.01 mm.
It should be noted that because of the production technology and process, the thickness uniformity of the PO film produced by various manufacturers is not the same. Why, because the thickness of the PO film changes within a certain range in the process of blow molding processing, just like blowing bubbles, the thickness of the bubbles is different in each place, but the state has issued standards for the uniformity error of the thickness of the film. As long as the error within the national standard, it is acceptable. If the thickness is uneven, it will shorten the service life of the PO film.