Detailed introduction :
1. Characters :
Silica Gel, with mSiO2.nH2O as its chemical molecular formula, is a high adsorptive material, also a non-crystal substance. It is made through the reaction of Sodium Silicate (Na2SiO4) and Vitriol (H2SO4), then through a series of physical reaction such as aging and finally dunking in acerbity. Due to its stable chemical quality, it does not react with other substances except alkali and hydrofluoric acid. For these reasons, it bears many characters that many other materials cannot replace: high adsorption, excellent thermal endurance and good mechanical strength, non-toxicity, non-odorless, no pollution. The quality of Silica Gel conforms to P.R.C Chemical Standard HG/T2765.1-96 and P.R.C military GBJ2714-96.
2. Application：
It is widely used in garments, hang-bags, foodstuff, pharmacy, toys, wooden products, apparatus, electronics, computer, and furniture. Anti-moisture and mouldy-proof effect can be achieved by getting rid of moisture and controlling the relative humidity.
3. Main Ingredients :
|
Ingredients
|
content (%)
|
Ingredients
|
content (%)
|
|
SiO2
|
99.6
|
Na2O
|
0.17
|
|
Fe2O3
|
0.02
|
MgO
|
0.01
|
|
CaO
|
0.04
|
Al2O3
|
0.16
|
4. harmful elements
|
elements
|
content
|
|
Cd
|
<2ppm
|
|
Pb
|
<2ppm
|
|
Hg
|
<2ppm
|
|
Cr(VI)
|
<2ppm
|
|
PBBS
|
<5ppm
|
|
PBDES
|
<5ppm
|
5 ．Packaging：
In terms of weight: Package of different weights ranging from 1g to 100g is available in our factory to satisfy customers’ requirements.
In terms of packaging materials: Composite paper, cotton paper, non-woven cloth, OPP transparent waxpaper, Japanese AIWA paper, Dupont paper, CT paper.
Printing: Printing with Chinese, English, French, Germen or Spanish is available to meet customers’requirements.
Outside packaging: plastic bag or metal pail lined
6. Capability：
|
No.
|
Item
|
reference（ JIS-Z0701 ）
|
|
1
|
packaging appearance
|
Wonderful appearance, clear print, non-breakable
|
|
2
|
seal
|
trim seal, steady and non-breakable
|
|
3
|
granular appearance
|
abnormal ball granule
|
|
4
|
granularity
|
＞86%
|
|
5
|
g/ml Bulk density
|
＞ 750g/l
|
|
6
|
Absorption
|
RH=20%
|
＞10%
＞ 20%
＞ 30%
（25℃）%＞50
|
|
RH=40%
|
|
RH=80%
|
|
RH≧95%
|
|
7
|
moisture
|
＜ 5%
|
|
8
|
storage life
|
one year(airtight storage)
|
* Blue Silica gel contains a touch of Cobalt chlorides. In terms of the shape, It has two different kinds- the spheric and loaf shape. When in absorbing the moisture, its color will change from blue into purple and finally into reddish. In this way, it clearly shows the humidity of the surrounding environment; at the same time let us know if it can be still moisture-proof.
* Orange silica gel looks like a spheric vitreous body. It contains a color-developing agent, which changes from orange into greenish after absorption. And when it continue to change into dark blue, it shows us that this silica gel should be replaced. This kind of silica gel is a quite Environment friendly and healthy product because It does not include any Cobalt. |
