Nantong Hennly combines advanced technology from abroad, making improvements for the seal of the adhesive mixing equipment. Ordinary mixing device uses a conventional mechanical seal for the high-speed shaft seal. This structure in the event of leakage will make lubricating oil contaminated materials, and lead to the whole pot scrap materials, and there is no doubt that can cause a certain loss to the customer. To solve this problem, Nantong Hennly changed the structure of the mechanical seal to external leakage type instead of internal leakage. In any case, the oil will not contaminate the material. The structural designs fundamentally solve the problem that the customers concern, get the favour of customers.