S 38 CA

S 38 CA

S 38 CA is a modified homopolymer designed for the very high speed production of coextruded BOPP films. The product is used for the core of the coextruded film structure with a low seal temperature resin in the outside layers.
S 38 CA has been developed for coextrusion lines with a very high output and linear speed. The product allows an outstanding extrusion stability and thickness variation control, especially on cascade lines.The product provides also a very high drawability and readiness to a two way orientation.The product contains a reinforced processing stabilisation and a package of slip and antistatic agents but does not contain any antiblocking agents. BOPP films pro- duced with S 38 CA feature good mechanical properties, high impact strength and puncture resistance, even at low temperatures. The films form an excellent banter against moisture, odours, oils, fats and oxidation and feature high transparency, high gloss and good printability after corona treatment. The low sealing biaxially oriented coextruded films obtained with S 38 CA can be used for Vertical Form Fill Seal applications and lamination as well as Horizontal Form Fill Seal and overwrapping applications, according to the thickness and sealing properties obtained.


Coextruded film with a thickness of 20 to 40 μn is used for the automatic packaging of bakery products, snacks and pasta as well as for the overwrapping of boxes and cigarette packets.

PROPERTIES
METHOD (b) UNIT TYPICAL VALUE (a)
Physical properties
Melt flow rate (230 °C, 2.16 kg)
Density
ISO 1133
ISO 1183
dg / min
g/cm3
2.1
0.9
Mechanical properties
Flexural modulus
Tensile strength yield
Elongation at yield
Izod Impact Strength (notched) at 23°C
Hardness Shore D
ISO 178
ISO R 527
ISO R 527 
ISO 180
ISO 868
N/mm2
N/mm2
%
kJ/m2
points
1350
33
13
6.5
70
Thermal properties
Vicat softening point (9.8 N)
H.D.T. (0.46 Mpa)
Accelerated oven ageing in air
(forced circulation) at 150 °C
ISO 306/A
ISO 75/B
ISO 4577
°C
°C
hours
155
105
360

a) Values shown are averages and are not to be considered as product specification These values may shift slightly as additional data are accumlsted.
b) ISO test methods are the lates under the societys current procedures. All specimens are prepared by injection moulding.