Share some test standards or methods for the anti-drop performance of PET bottles

The free fall test
The purpose of the test: to simulate the possible drop of the bottle during normal use, so as to evaluate the resistance of the bottle to dropping.
Test method: The PET bottle is filled with a certain amount (usually rated capacity) of liquid or filled with a filler of the same weight as the liquid (such as sand), and free falls from the specified height to the specified surface. For example, from a height of 1 or 1.2 meters let the bottle fall freely onto the concrete floor or steel platform. The selection of the height is determined according to the possible height of the actual use of the bottle, such as the bottle may fall from the shelf during the handling of the warehouse, and this height is generally close to the height range of the worker's arm naturally lifting and lowering the item.
Judging criteria: Observe the state of the bottle after landing. If the bottle is not broken, there are no obvious cracks, and the liquid does not leak (if it is a liquid test), the bottle can be considered to be qualified at this height. If there is a crack or liquid leak, record the location and extent of damage to the bottle.
Tumbling test
The purpose of the test: to test the resistance of the bottle to multiple shocks due to rolling collisions during transportation or storage.
Test method: The PET bottle is placed on a track with a certain tilt Angle (such as 30° -45 °), and the bottle will roll down the track. The length and material of the track can be designed according to the actual need to simulate the transport or storage environment, for example, the track length can be set to 3-5 meters, and the material can be wood or metal. Bottles can be filled with liquid, partially filled with liquid, or filled with solids of appropriate weight. The bottle will continuously collide with the track wall and the ground as it rolls over.
Judging criteria: At the end of the test, check the bottle for cracks, distortions, or liquid leaks (if any). If the bottle can remain intact, the appearance is not significantly damaged, and the liquid does not leak (if applicable), the bottle passes the roll test, indicating that it has good fall resistance in a rolling collision environment.
Impact test
The purpose of the test: To evaluate the resistance of the bottle to the impact of a specific direction and strength.
Test method: Using the impact testing machine, the PET bottle is fixed on the test bench, and an impact hammer with a certain weight (such as 1-2 kg) is used to impact the specific part of the bottle from a certain height (set according to the actual test requirements, such as 0.5-1 meters) at a certain speed (which can be adjusted by controlling the falling height and Angle of the impact hammer). Such as the side, bottom or neck of a bottle. This test can simulate a bottle being hit by another object in transit or accidentally hit on a shelf.
Judging criteria: Observe the state of the bottle after impact. If the bottle does not break, crack, and the liquid does not leak (for the bottle containing the liquid), the bottle is qualified in the impact condition. At the same time, the maximum impact energy that the bottle can withstand (calculated by parameters such as the weight of the impact hammer, fall height and speed) is recorded in order to compare the fall resistance of different bottle designs or material formulations.
Low temperature drop resistance test
Test purpose: Since the drop resistance of PET bottles at low temperatures will decrease, the test is mainly to evaluate the drop resistance of the bottles at low temperatures.
Test method: First, the PET bottle is placed in a low-temperature environment box, and the temperature is adjusted to the specified low temperature value, such as -10 ℃, -20 ℃, etc., and maintained for a certain time (usually 2-4 hours), so that the temperature inside and outside the bottle fully reaches the set low temperature. Then follow the free fall test, impact test or tumbling test methods described above. For example, from a height of 0.8 meters, let the bottle free fall to the ground at a low temperature.
Evaluation criteria: Similar to the test evaluation criteria at normal temperature, but because the bottle is more likely to be damaged at low temperatures, the record of the degree of damage to the bottle should be more detailed, including whether there is a brittle rupture (the whole bottle is broken into several pieces), the length and number of micro-cracks. If the bottle can still maintain good integrity at low temperatures, it indicates that it has good anti-drop performance at low temperatures.