Glass bottle material performance:
The thermal expansion coefficient α specified in the new standard, 3.3 borosilicate glass and 5.0 borosilicate glass, are completely consistent with international standards. Low borosilicate glass is unique to China, and there is no such material in international standards. Soda lime glass ISO stipulates α= (8～10) ×10 (- 6) K(- 1), and the new standard stipulates α= (7.6～9.0) ×10 (- 6) K(- 1 ), the indicators are slightly stricter than the international standards. In the new standard, the material and chemical properties of 3.3 borosilicate glass, 5.0 borosilicate glass and soda-lime glass at 121 ℃ for particle method water resistance are consistent with international standards. In addition, in the above three glass types, the content of boron oxide (B-2O-3), a chemical component, is completely in line with international standards.
Glass product performance: The internal surface water resistance, thermal shock resistance, and internal pressure resistance of the product performance specified in the new standard are consistent with international standards. The internal stress index of ISO standard stipulates that ampoules are 50nm/mm and other products are 40nm/mm. The new standard stipulates that ampoules are 40nm/mm, so the internal stress index of ampoules is slightly higher than the ISO standard.
