What are the mechanical performance tests for glass milk bottles?
1. Thermal shock resistance test
The heat-resistant impact resistance of the glass bottle body should meet the requirements in the following table:
Mandatory national standards for baby bottles and pacifiers will be implemented from November 1st
In the test, by simulating specific temperature environments in water and air, the test environment of the sample is replaced according to the standard requirements for a certain period of time, and a hot and cold water tank and electronic oven are used to achieve the effect of rapid heating and cooling temperature difference. Check the appearance of the sample for visible cracks or breakage after testing.
2. Internal stress testing
The standard requires that the apparent stress at the bottom of the glass bottle should be less than or equal to level 4, which reflects the annealing quality of the glass sample. According to the "interference color", the stress level of the glass sample can be qualitatively judged: if the color of the sample remains basically unchanged or only slightly changes, it indicates good annealing quality and proper process quality control; conversely, if the interference color changes significantly in certain parts, it indicates poor annealing quality and is prone to cracking in daily use.
3. Mechanical impact strength test
The standard requires that the mechanical impact strength of the glass bottle body should be greater than or equal to 0.10J, and the allowable number of ruptures for 8 impact samples should be less than or equal to 1. The testing principle is to use a pendulum impact to release the specified impact energy.
In addition to the additional technical requirements for glass milk bottles, in order to further meet the performance requirements of the domestic market, the new national standard also adds the following system performance requirements: boiling water resistance (to meet the requirements of boiling water disinfection and cleaning), transparency (to facilitate daily observation of the contents of the bottle), overall drop performance (to evaluate the impact of the bottle falling from a high place), and compressive deformation performance of the plastic bottle body (to detect whether the bottle body is easily deformed when subjected to force).
In the fourth quarter of 2020, the GB 38995-2020 standard for infant and toddler bottles and pacifiers was released, scheduled to be implemented from November 1, 2021, and is mandatory. This means that the era of no testing standards for infant and toddler products is over.
Jinan Zhongnuo, as a packaging testing instrument manufacturer with more than ten years of rich experience, closely follows policies and aims to provide users with packaging quality control integrity solutions. The experimental instruments produced, such as polarization stress tester, intelligent electronic tensile machine, glass bottle heat-resistant impact tester, glass bottle impact resistance tester, etc., are all used to test the performance of baby bottle nipples, providing equipment and technical support to ensure that baby bottle nipples meet national standards!
Attachment: Mechanical performance testing of glass milk bottles (provided by Guangzhou Customs)