| | |
The glass of
USP-1
brand is the neutral borosilicate glass with the high
content of boron,
high thermal
and
chemical stability. This glass is intended for the glass
tube production
and should be
in accordance with TU U 00480945-002-96
«Medical
glass USP-1 brand».
The water
resistance of glass USP-1 corresponds to the class HGA 1 ISO
720.
The alkali resistance of glass USP-1 corresponds to the
class 2 State Standard 19810.
This properties
permit to use the glass USP-1 for medicine bottles
production, which
provides the
long-term
and sure
storage
of the medicine.
|
Chemical
composition of medical glass USP-1
|
Components |
Contents in the mass shares, % |
|
SiO2 |
74.20 |
|
B2O3 |
8.30 |
|
Na2O |
7.90 |
|
Al2O3 |
5.40 |
|
Sum CaO, MgO |
3.20 |
|
K2O |
1.00 |
|
The main
physical characteristics
medical glass USP-1
|
Denomination |
Unit measure |
Value |
Thermal resistance, not less |
оС |
170 |
Coefficient of linear thermal expansion in the range
20 - 300
оС |
α х 10-6degree-1 |
5,9 |
Density |
g/cm3 |
2,36 |
|
Water resistance,
not more |
mg
Na2O
by
1g
of glass |
0,030 |
|
Alkaline resistance
,
mot more |
mg/dm2 |
120 |
| |
|
