\ \ Foil-coated fluoroplast insulator

Foil-coated fluoroplast insulator

Foil-coated plain and reinforced fluoroplast sheets (FF-4, FAF-4D) GOST 21000-81 Foil-coated reinforced fluoroplast-4D sheets (FAF-4DSKL) TU 6-05-1817-88

FAF-4D sheets represent reinforced by varnished cloth fluoroplast-4D coated by electrosheet copper of 0.035 or 0.05 mm thick on each side.

FAF-4DSKL sheets represent alternate one after another layers of tape F4D-SKL and glass cloth coated by electrosheet copper of 0.035 or 0.05 mm thick on each side.

FF-4 sheets represent fluoroplast-4 coated by electrosheet copper of 0.035 or 0.05 mm thick on each side.

Foil-coated high-frequency insulators are used widely as a base of circuit plates working in microwave band, as electrical insulation for printed components of transmitter-receivers; they are able to work in the temperature range between -60°C and +250°C.

Standards

Characteristics
Grade standards
FAF-4D
FF-4
FAF-4DSKL
1. Foil-base bond resistance on 10-mm stripe, N (kgf), not less
17,6 (1,8)
9,8 (1,0)
17,6 (1,8)
2. Dielectric loss tangent of angle at frequency of 106Hz, not more
7*10-4
4*10-4
6*10-4
3. Permittivity at frequency of 106 Hz, not more
2,5±0,1
2,0±0,1
2,5±0,2

FAF-4D sheets are produced of any size from 170*280 mm till 500*500 mm.

FAF-4DSKL sheets are produced of any size from 100*100 mm till 500*500 mm.

FF-4 sheets are produced of any size from 100*100 mm till 400*400 mm.

Length and width allowances are ±10 mm.

Rated thickness with allowances

Sheet grade
Sheet thickness, mm
Allowance, mm
Weight (1 m2/kg)
FAF-4D
0,27
0,5
1,0
1,5
2,0
2,5
3,0
4,0
5,0
±0,03
±0,10
±0,15
±0,15
±0,20
±0,20
±0,20
±0,30
±0,30
1,45 – 1,5
2,8 – 2,9
3,92 – 4,0
4,92 – 5,0
5,9 – 6,2
7,2 – 7,3
9,48 – 9,6
10,6 – 10,8
FF-4
1,5
2,0
2,5
3,0
3,5
4,0
5,0
±0,25
±0,25
±0,30
±0,30
±0,35
±0,35
±0,35
The same as FAF
FAF-4DSKL
0,5
1,0
1,5
2,0
2,5
3,0
±0,10
±0,15
±0,15
±0,20
±0,20
±0,20
The same as FAF

According to the agreement between the customer and the manufacturer sheets can be produced of different sizes and thickness. At the same time allowances are determined to the nearest large thickness.