S Digitaal S125 Plus 4in1 .pdf


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S-Digitaal S125 Plus 4 x100 meter Made in Europe
PHYSICAL FOAMING
Frequency

Chemical foaming Physical foaming

400 MHz

16,1 dB/100 m

12,9 dB/100m

800 MHz

27,7 dB/100 m

18,8 dB/100 m

1000 MHz

31,3 dB/100 m

21,2 dB/100m

1750 MHz

29,0 dB/100m

2150 MHz

29,7 dB/100m

2400 MHz

34,8 dB/100m

What is physical foaming technology?
During the production of insulation Nitrogen gas is injected into the PE material with a special
machine. The foaming provided by this technology is called as PHYSICAL FOAM (Gas
Injected Foam). This technology is also called as Skin-Foam-Skin and composed of three
different layers.
Inner Skin: This layer is composed of some kind of glue material and applied directly into the
inner conductor copper. The thickness of this layer is 0.05 µm. By this way the 2. layer is
provided to stick on the inner conductor tightly. This layer improves the electrical properties
of the insulation.
Foam Skin: The thickness of this layer changes depending on the type of cable. This layer is
composed of PE material mixture which is foamed by injecting Nitrogen Gas. Here the rate
and the homogeneity of foam effects the electrical properties of the cable directly.
Outside Skin: This layer is composed of PE material. The thickness of this layer is 0,07 µm.
This layer covers the Foam Layer completely and protects the Foam Rate and also protects

the cable from moisture. By this layer the cables does not lose its electrical properties for
long years.
What is the advantage of Physically Foamed cable?
- Cable is not effected from moisture
- Cable is more flexible
- Cable is laid down more easily
- Cable is not effected from water
- Cable keeps its electrical properties same for long years
- The attenuation of the cable is more stable in high frequencies
- The warranty time of the cable is 15 years from production date
The below is the comparison of the attenuations of RG 6 U type coaxial cable, produced by
chemical foaming which is the old technology and physical foaming which is the latest
technology, in same frequency ranges.
STRUCTURAL PROPERTIES
Type

RG6 U4

Inner Conductor

1.02 mm Annealed Copper

Insulation

Nitrogen injected PE

Outer Diameter of Insulation

4.8 mm ± 0.15 mm

Outer Conductor

AL-PET Foil+Braid

Foil

Thickness 23 µm, Width 18 mm

Braid

16 x 4 x 0.12 x mm SnCu

Covering Rate

%45

Diameter On Outer Screen

5.34 mm ± 0.2 mm

Jacket

PVC White

Outer Diameter

6.8 mm ± 0.2 mm

Min. Wall Thickness

0.50 mm

Nom. Wall Thickness

0.65 mm

Min. Bending Radius

35 mm

Weight

45 g/m

ELECTRICAL PROPERTIES
75 ± 3 Ohm
˛51.1 Ohm/km
˛23.0 Ohm/km
˛28.1 Ohm/km
54 ± 2pF/m
%84


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