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PY-B Type B silica gel

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Appearance: milky white, semi-transparent spherical or granular.

Characteristics:
high adsorption capacity at high relative humidity, apply for control humidity and anti-condensation packaging.

Properties:
Type B silica gel belongs to an inorganic and an amorphous material, is a highly active adsorption material; non-toxic, odorless, chemically stable, won’t dissolve in any solvent except for alkali and hydrofluoric acid.

Making method:
is generally obtained by reaction of sodium silicate and sulfuric acid, then undergo the process of aging, acidic soaking, washing, surfactant treatment, first drying, sieve and secondary drying.


Including:
1. According to the shape:
(1) Type B beaded silica gel
(2)Type B semi-spherical silica gel
2. According to the application:
(1) Normal Type B (bulk density 500-600 g/l)
(2) Type B-L (bulk density 450-500 g/l)
(3) Type B-SL (bulk density 390-450 g/l)


Type B beaded silica gel  Sizes: 0.5-1.0mm、0.5-1.5mm、0.5-2mm、1-2mm、1-3mm、2-4mm、2-5mm、3-5mm 、4-8mm……
Type B semi-spherical silica gel  Sizes: 0.5-2mm、1.5-4mm、0.5-4.0mm

Basic quality datas:
Average pore diameter: 4.5-7.0nm
Surface area: 450-650m2/g ,
Pore volume:0.6-0.85ml/g

Items

 

Typical values (Normal Type B)

 

Typical valuesType B-L

Typical values (Type B-SL)

Beaded

Beaded

Beaded

Beaded 

Appearance

White, milky white or transparent

White, milky white or transparent

White, milky white or transparent

White, milky white or transparent

Qualified size ratio, %  >

95

95

92

92

Bulk densityG/L

500-600

500-600

450-500

390-450

Pore volum,  ml/g

0.65-0.85

0.65-0.85

----

----

Pore diameternm

4.5-7.0

4.5-7.0

----

----

Adsorption capacity %

RH= 20%   

5

5

5

5

RH= 50%   

11

11

11

11

RH= 90%   

70

70

70

70

Qualified ratio of spherical granules %  >

85

85

85

Loss on heating,%

2

2

2

2

PH  Value

5.5-7.5

5.5-7.5

6 - 8

6 - 8

Specific resistance  Ω .CM        

8000

8000

10000

10000

SiO2 %        >

99

99

99

99


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