Mr. Xu is a purchaser of a sliding door manufacturer. He has been very upset recently because he received complaints from the previous subway project. The reason for the investigation is that after using the long strip brush for a period of time, the filament loss occurs due to long-term friction, and the loss of the sealing effect leads to the leakage of the cold air, and is also very unattractive. Now that I have received a complaint from Party A, it is urgent to find a better supplier. Mr. Xu found AOQUN through a friend introduction.

Mr. Wang of AOQUN received Mr. Xu. After understanding the situation, the sample of the long strip brush brought by Mr. Xu was tested. Firstly, the pulling force is only 3kg. The insufficient pulling force will cause filament loss under long-term friction and stress. The PP material is used for the long strip brush. It cannot be rebounded after sweeping and rubbing, and the deformation is serious. For the above problems, it can be solved from the material and replaced with a PA material with stronger flexibility and resilience. The tension will be larger when the number of filaments is increased. Then Mr. Wang also tested the existing long strip brush of the AOQUN, and the pulling force can reach 7kg. After that, Mr. Xu was happy to bring back the samples.

On the third day after taking the sample of the long strip brush for the sliding door, Mr. Wang received a call from Mr. Xu: "Our leader is very satisfied. Now I have promised to replace the long strip brush of a station. If there is no problem. All of them use AOQUN’s long strip brush." Then there was an order of 1200 meters.