SIDISTAR® R 320U

Process modifier for light coloured rubbers. Amorphous, spherical silicon dioxide. Flame retardant synergist for rubber; viscosity modifier; improved dispersion and flex fatigue, roofing membranes.

General

SIDISTAR® R320U is a specially designed light-coloured process modifier consisting of spherical, submicron particles of amorphous silicon dioxide. The nature of the product allows excellent dispersion of these particles in the elastomer matrix. This leads to improved dispersion of all compound ingredients and a better flow, allowing higher extrusion speeds and smoother surface of the end product.. The product is supplied in an undensified form. 

Application

SIDISTAR® R320U has been designed for the usage in rubber compounds. Areas of use include flame retardant cable compounds; anti-vibration parts; hoses; roofing membranes etc.

Storage conditions

The product is recommended to be stored in a covered dry place, protected from direct UV light. Recommended storage temperature between +5 ºC and +40 ºC (+45ºF and +104ºF) . It’s important that the minimum temperature is > 5ºC (9ºF) above the dew point. Recommended relative humidity < 85%. 

Shelf life

We recommend that the product should be used within 2 years from production date.

Physical data and chemical properties

PropertiesTest methodUnitLimits
SiO2 (Silicon dioxide, amorphous) ESM-LAB-18 % 96.0 - 99.0
C (Carbon) ESM-LAB-05 % ≤ 0.20
Fe2O3 (Iron oxide) ESM-LAB-17 % ≤ 0.25
H2O (Moisture, when packed) ESM-LAB-02 % ≤ 0.8
Loss on Ignition (L.O.I.) @ 950o C ESM-LAB-03 % ≤ 0.60
Coarse particles >45µ (325 mesh) ESM-LAB-09 % ≤ 0.10
pH-value (fresh) ESM-LAB-10   7 - 9
Bulk Density (when packed) ESM-LAB-08 kg/m3 150 - 350

 

Other properties (Measured on undensified material)UnitTypical values*
Specific surface area (BET) m2/g 18 - 25
Median particle size μm 0.15
L-value % ≥ 90.0
Specific Gravity   2.2

*Typical values are for indicational use only, values are not part of Elkem Silicon Materials standard analysis.

Test methods

Material data given in this product specification refer to analysis according to Elkem internal standard test methods, which are available upon request.

Packing

DescriptionBig bagsSmall bags
Bag on pallet 1 big bag 40 small bags
Net weight 1 bag 400 kg 15 kg
Net weight on pallet 400 kg (881 lb) 600 (1323 lb)
Gross weight

400 + 20 = 420 kg
(881 + 44 = 925 lb)

600 + 20 = 620 kg
(1323 + 44 = 1367 lb)

Bag dimension (L x W x H)

106 x 106 x 142 cm
(41.7 x 41.7 x 55.9 in) 

73 x 46 x 20 cm
(28.7 x 18.1 x 7.9 in)

Discharge spout
Ø:
Length:


42 cm (16.5 in)
70 cm (27.6 in)

 

Bag material 

Coated woven polypropylene fabric 

Multilayer paper bag
with PE liner

Cover / protection 

LDPE shrink hood 

LDPE shrink hood 

Pallet

Fumigated wood 

Fumigated wood

Pallet dimensions incl bags
(L x W x H)

105 x 105 x 147 cm
(41.3 x 41.3 x 57.9 in) 

120 x 100 x 180 cm
(47.2 x 39.4 x 70.9 in)