exam topic: Class A general product assessment project : Check if there are any bad designs or components that are harmful to the user during use. Roller / handle performance Set the load of the bag under normal use, examine the fatigue resistance of the roller after rolling for a long time, and the strength and durability of the handle / strap. Class B Higher Quality Products Assessment Project : Set the load to test the strength of the handle / strap when it is in the static suspension condition beyond the normal weight. Pull handle dynamic strength load test It can simulate the strength of the handle when the handle is under load. For example, when the bag handle pulls repeatedly and puts it down, it will reflect the damage of the material and the poor design of the handle structure. Class C quality product assessment project : The normal weight-bearing bag samples fell at a certain height and fell for a corresponding number of times to check for broken conditions. Squeeze test Simulates cases where bags are squeezed during transport or in storage. Rod durability test Simulate the process of raising and lowering the pull rod to check the fatigue resistance of the pull rod mechanism. other projects Case - Structural Stability Test Material physical properties - Material chemical properties - Attachments -  Dongguan Haida Instrument Co., Ltd. specializes in the production and sales of luggage testing equipment , not only has a leading technology level at home and abroad, more good after-sales service and high-quality solutions. Hotline: 400-071-1808/0769-89280808 ! Cartoon pattern document bag,a4 document bag,document organizer bag Rongxin New Material (Jiangsu) Co., Ltd. , https://www.rongxinxcljs.com