Clear Low Borosilicate Glass Tubing
Zhengchuan has been in the pharmaceutical glass packaging industry for over 30 years. We can supply Clear Low Borosilicate Glass Tubing for making ampoules, vials, cartridges, syringes etc
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Chemical composition & performance |
Type of Glass |
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|
Neutral borosilicate glass tubing |
Low borosilicate glass tubing |
Soda Lime Glass Tubing |
|
|
B2O3 (%) |
≥8 |
≥5 |
<5 |
|
SiO2 (%) |
About 75 |
About 71 |
About 70 |
|
Na2O+K2O(%) |
About 4~8 |
About 11.5 |
About12~16 |
|
MgO+CaO+BaO+SrO(%) |
About 5 |
About 5.5 |
About 12 |
|
Al2O3(%) |
2~7 |
3~6 |
0~3.5 |
|
Coefficient of Mean Linear Thermal Expansion |
3.5~6.1 |
6.2~7.5 |
7.6~9.0 |
|
121℃ Hydrolytic Resistance of Particle |
1 Class |
1 Class |
2 Class |
|
98℃ Hydrolytic Resistance of Particle |
HGB 1 Class |
HGB 1 Class or HGB 2 Class |
HGB 1 Class or HGB 2 Class |
|
Acid Resistance |
1 Class |
1 Class |
1 ~2 Class |
|
Alkali Resistance |
2 Class |
2 Class |
2 Class |
Production process flow chart of glass tube
Raw materials
Weighing and proportioning ingredients
Melting Forming of glass tube
Inspection of glass tube
Packaging of glass tube
Storage of glass tube
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