\ \ \ Fluoroplast-4D varnished cloth

Fluoroplast-4D varnished cloth

(TU 301-05-42-89)

It represents electrical insulating cloth from glass twisted threads and glass М-1 cloth treated by fluoroplast-4D suspension.

Fluoroplast-4D varnished cloth is distinguished by the higher dielectric properties, warm and chemical durability. The frame of glass cloth increases the mechanic properties of material significantly (by 2-3 times) in comparison with pure fluoroplast and eliminates cold flow.

Conveyer belts of different length and width (they are applied in textile and food industries), covers, sleeves and other are produced from fluoroplast varnished cloth. Their sizes are agreed additionally.

Depending on its application varnished cloth is produced of 5 grades:

  • F-4D-E01-А,
  • F-4D-E01-B,
  • F-4D-E01-V,
  • F-4D-E007-А,
  • F-4Д-E07-B

Varnished cloth grade
Recommended field of application
F-4D-E01-А
Produced from foil-coated reinforced fluoroplast-4D sheets (FAF-4D).
F-4D-E1-B
Used for heat insulation of thermal elements in machines and devices welding thermoplastic materials such as polyethylene, polyethylene-cellophane and other by direct contact with the heating element of “Bologna” cloth as a release lining; used as anticorrosive insulation of steel reinforcement, insulation of electrical machines; used for diaphragm production, in conveyer belts applied for cohesive and light in weight masses.
F-4D-E01-V
Used for slot insulation of electrical equipment (for ex., electric drills and as a base for conveyer belts of infrared drying devices while producing articles of electronic equipment).
F-4D-E007-А
Used as antiadhesion fluoroplast material with adhesive layer, insulation of electric machines and wires including slot insulation of electric motors of well pumps.
F-4D-E007-B
Used as antiadhesion, antifriction and electric insulating material.

Articles from varnished cloth work under the temperature range between -100°C and +250°C.

Varnished cloth of any grade corresponds to the dimensions mentioned in the table.

Dimensions
Grade standards
F-4D-E01-А
F-4D-E01-B
F-4D-E01-V
F-4D-E007-А
F-4D-E007-B
Thickness, mm
Thickness tolerance, mm
0,20
+ 0,02
- 0,02
0,20
+ 0,05
- 0,07
0,20
+ 0,03
- 0,04
0,09
+ 0,01
- 0,02
0,09
+ 0,03
- 0,02
Width, mm, not less
600
200
200
850
100
Length, m, not less
10
0,5
25
25
0,9
Weight of 1 m2, kg
0,4 – 0,5
0,25 – 0,6
0,4 – 0,5
0,18 – 0,2
0,18 – 0,22

Standards

Characteristics
Grade standard
F-4D-E01-А
F-4D-E01-B
F-4D-E01-V
F-4D-E007-А
F-4D-E007-B
Tensile strength, MPa (kgf/cm2), not less
78,4
(800)
68,6
(700)
68,6
(700)
63,7
(650)
58,8
(600)
Volume resistivity, Ohm*m, not less
5*10+13
-
-
-
-
Dielectric loss tangent at frequency of 1 mHz, not more
0,0007
-
-
-
-
Permittivity at frequency of 1 mHz, not more
2,5
-
-
-
-
Electric strength, kV/mm, not less
DC voltage
AC voltage at frequency of 50 Hz
62
-
25
-
30
-
-
21
-
10
Fluoroplast-4D content, %, not less
75
40
50
65
50