HOLLOW BODY HAVING A WALL OF GLASS WITH A SURFACE REGION HAVING CONTENTS OF SI AND N
A hollow body includes a wall of glass which at least partially surrounds an interior volume of the hollow body. The wall of glass has a wall surface which has a surface region. At least in the surface region the wall surface has a content of N in a range from 0.3 to 10.0 at-%, and at least 5 at-% Si.
1 . A hollow body, comprising:
a wall of glass which at least partially surrounds an interior volume of the hollow body, the wall of glass having a wall surface which comprises a surface region, at least in the surface region the wall surface has a content of N in a range from 0.3 to 10.0 at-% and a content of at least 5 at-% Si, the contents of Ni and S being determinable by X-ray photoelectron spectroscopy.
2 . The hollow body of claim 1 , wherein in the surface region the wall surface further has a content of 0 in a range from 35 to 70 at-%, the content of 0 being determinable by X-ray photoelectron spectroscopy.
3 . The hollow body of claim 1 , wherein in the surface region the wall surface further has a content of less than 20 at-% of C, the content of C being determinable by X-ray photoelectron spectroscopy.
4 . The hollow body of claim 1 , wherein in the surface region the wall surface further has a content of alkali metal atoms and alkali metal ions in sum of at least 1 at-%, the content of alkali metal atoms and alkali metal ions being determinable by X-ray photoelectron spectroscopy.
5 . The hollow body of claim 1 , wherein in the surface region the wall surface further has a content of B of at least 0.5 at-%, the content of B being determinable by X-ray photoelectron spectroscopy.
6 . The hollow body of claim 1 , wherein X-ray photoelectron spectroscopy of the surface region shows an N1s-peak at a binding energy in a range from 397.5 to 405.0 eV.
7 . The hollow body of claim 1 , wherein the surface region of the wall surface has a coefficient of dry sliding friction of less than 0.4.
8 . The hollow body of claim 1 , wherein the hollow body lacks a coating applied to the wall of glass.
9 . The hollow body of claim 8 , wherein the hollow body is suitable for holding a pharmaceutical composition in accordance with Section 3.2.1 of the European Pharmacopoeia, 7th edition.
10 . The hollow body of claim 1 , wherein the wall of glass has a wall thickness and in the wall region the wall of glass has a content of chemically bound N throughout a functionalizing depth which extends from the wall surface along the wall thickness into the wall of glass.
11 . The hollow body of claim 10 , wherein the functionalizing depth is less than the wall thickness in the wall region.
12 . The hollow body of claim 10 , wherein the functionalizing depth is in a range from 5 nm to 10 μm.
13 . The hollow body of claim 1 , wherein the hollow body has a transmission coefficient for a transmission of light of a wavelength in a range from 400 nm to 2300 nm through the hollow body via the surface region of more than 0.7.
14 . The hollow body of claim 1 , wherein the hollow body has a haze for a transmission of light through the hollow body via surface region in a range from 5% to 50%.
15 . The hollow body of claim 1 , wherein the hollow body is a container and further comprises a closure closing the container and a pharmaceutical composition placed in the interior volume.
16 . The hollow body of claim 1 , wherein the wall of glass comprises at least one of a borosilicate glass, an aluminosilicate glass, and fused silica.
17 . The hollow body of claim 1 , wherein the wall of glass comprises from top to bottom of the hollow body:
a top region;
a body region, which follows the top region via a shoulder; and
a bottom region, which follows the body region via a heel.
18 . The hollow body of claim 1 , wherein, towards the interior volume, the wall of glass is at least partially super-imposed by at least one of an alkali metal barrier layer or a hydrophobic layer.
19 . A process for making an item, comprising as process steps:
a) providing a hollow body comprising a wall of glass, the wall of glass at least partially surrounding an interior volume of the hollow body, having a wall surface which comprises a surface region, and comprising a wall region which has the surface region; and
b) introducing N at least into the wall region, thereby obtaining a content of N of the wall surface at least in the surface region in a range from 0.3 to 10.0 at-%, wherein the preceding content of N is determined by an X-ray photoelectron spectroscopy.
20 . A process, comprising as process steps:
A) providing a hollow body, the hollow body comprising a wall of glass which at least partially surrounds an interior volume of the hollow body, the wall of glass having a wall surface which comprises a surface region, at least in the surface region the wall surface has a content of N in a range from 0.3 to 10.0 at-% and a content of at least 5 at-% Si, the contents of Ni and S being determinable by X-ray photoelectron spectroscopy;
B) inserting a pharmaceutical composition into the interior volume; and
C) closing the hollow body.