There are several requirements for the mechanical constituent materials of CE certification for vacuum packaging machinery：
　　Materials used in the manufacture of mechanical equipment, or products used or produced during the use of mechanical equipment, shall not pose a hazard to the safety and health of the exposed personnel.
　　Especially when using liquid materials, mechanical equipment must be designed and manufactured so that it does not pose a hazard due to filling, use, recycling or discharge.
　　Other mechanical products should also be paid attention during production in order to comply with the EU Machinery CE certification regulations.