The webbing used before nylon webbing is usually woven by spinning, so the edges should be trimmed before use to prevent slack. New webbing that has not been used is often referred to as initial webbing.

It can be seen from the working principle of the seat belt that when the occupant's body rushes forward rapidly, the webbing binds the occupant's body to prevent the occupant from rushing forward. At this time, the webbing will naturally be subjected to an infinite impulse, so the webbing must be strong and powerful. This strength is the strength of the webbing, which is usually characterized by tensile strength, sometimes called tensile strength.
In order to eliminate the influence of environmental humidity and temperature on the maintenance of the quality characteristics of the webbing, before the maintenance of the webbing, the webbing needs to be treated with standard temperature and humidity, which is referred to as the standard temperature and humidity treatment. The method of disposal is usually to put the webbing in a certain temperature and relative humidity environment, and then hold it for a certain period of time. It is necessary to take out the webbing and test it immediately. If the treated webbing cannot be tested immediately, the webbing should be stored in a sealed container until At the beginning of the test, the strength obtained by stretching the webbing after this treatment is called the tensile strength of the standard temperature and humidity treatment, or the tensile strength of the webbing for short. Tensile tests were carried out on the electronic tensile tester.