Will the retraction of the waist of the oil filter affect its filtration performance?

The oil filter of a car is one of the maintenance parts that car owners come into contact with most frequently.
Generally speaking, machine filters can be divided into two types: screw-mounted (IE. Fused) machine filters - iron shell machine filters. Just unscrew the old machine filter and replace it with a new one. The operation is simple. Modular (IE. Split or environmentally friendly) machine filters - Machine filters "bare" filter paper. When replacing, simply open the oil filter housing and replace the filter element inside.

Although the structural forms of the two types of filters are different, they essentially filter out impurities in the engine oil through filter paper.
If you observe carefully, you can see that most high-end cars prefer split environmental protection filters. In addition to being environmentally friendly, the quality of the filter paper can also be more directly observed through eco-friendly filters. Of course, the main reason is that high-end cars have more components, leaving an inch of land and money for the engine. Using eco-friendly filters can save more space. However, many car owners will find that the filter screen of the replaced environmental protection machine will show the waist retraction phenomenon as shown in the following picture. Will this phenomenon affect the filtration performance of the machine filter?

Then, why does the filter screen of the environmental protection machine shrink at the waist? Will the waist-cinching filter screen affect the filtration performance?
Reason:

Generally speaking, there are two main reasons for this lumbar adduction:
If there are too many impurities in the engine oil, after 5000 kilometers of use, due to the high filtration accuracy and large dust holding capacity of the machine filter, after a period of use, more impurities will cover the surface of the filter element, causing the oil pressure to rise. This may lead to deformation of the engine oil filter element.

1. Due to the different dimensions of the inner diameter of the machine filter and the outer diameter of the supporting pipe, there is a certain gap between the inner diameter of the machine filter and the supporting pipe. The waist position in the middle of the mechanical filter is the weakest part of the entire filter element. After being used for a period of time, the pressure difference of the filter element keeps rising, and the oil pressure that the filter paper bears will become increasingly greater. Then, the waist position of the machine filter will sag inward.

Filter performance impact:

Please note that if the replaced filter only shrinks inward in the middle of the waist, but the overall size, the welding condition of the upper and lower covers and the filter paper, and the flatness of the upper and lower covers of the filter are intact, it will not affect the filtration performance of the entire filter and the product.