Investigation of parameters affecting the extension of papers used in the production of air filters

The Air filter is responsible for preventing substances such as dust, particles, and grains from entering the cylinders before the air in the atmosphere passes into the engine, and filtering and conveying the air required to the engine in a desired way under all operating conditions and allowing the engine to breathe. The main function of the filtering medium is the filter element paper, and they are materials with a complex structure. The bonds and fillers between the fibers form the general structure of the paper. It is very sensitive due to both the environmental conditions and its woody and hygroscopic structure. This woody structure absorbs the moisture in the environment, which affects the stable structure of the papers. Air filter papers with three different structures were tested in weight test, permeability test, filter paper bursting strength test, filter paper pore diameter test, moisture detection test, air filter pressure test, FTIR and SEM measurements, and the humidity and length change of the filter paper depending on time and environmental conditions and tests were applied. Air filter papers; After the package was opened, the test parameters were applied by keeping it under constant and variable environmental conditions, based on 0(zero), 24 (twentyfour hours), 48(fourtyeight) and 144(one hundered fourty four) hours. Paper's structure allows it to absorb moisture in the environment, meaning that wet fibers extend more. It has been determined that this amount of elongation occurs faster and to a higher extent in paper samples kept in environmental conditions with varying temperature and humidity, while the opposite is true in papers kept in constant environmental conditions. The fact that paper is so much affected by its environment and the environmental conditions in which paper is found has provided extremely important information for both paper producers and secondary producers who use paper as raw material. Keywords: Filter, Paper, Filtering Paper, Air Filter