Varnished fabrics
Varnished fabric – special material being a base impregnated with certain composition, permitting to obtain final product with given specific characteristics. Synthetic and natural fabrics, and also glass fiber may be used as base for varnished fabrics.
For impregnation are used polyester, oil, organosilicon and other binders selected depending on requirements to the final product.
Process of varnished fabric production passes through several stages:
- Production of base;
- Impregnation of base (several times);
- Thermal treatment of each composition layer.
The best varnished fabric is made of glass fiber and has impregnation with PTFE-4. In such way they obtain high quality fluorovarnished fabric, having improved dielectric properties, chemical and thermal resistance, and excellent working characteristics.
Despite the huge range of varnished fabrics, the fluorovarnished fabric has undisputable advantages, among which:
- high resistance to heat and cold (products from flurorovarnished fabric work in temperature range from minus 100°C to plus 250°С.)
- resistance to aggressive components;
- low heat conductivity;
- excellent antifriction properties;
- excellent resistance to adhesion.
Thanks to these characteristics flurorovarnished fabrics are widely used in food, textile and other industries, where they are used:
- to make reinforced foiled sheets;
- to insulate electric devices;
- for anticorrosion protection of steel fittings;
- for heat insulation of heating elements used for welding polyethylene and thermoplastic materials;
- to make trays for bakery products.
Recommendations on application of various varnished fabric grades:
|
Varnished fabric grade |
Recommended application |
|
F-4D-E01-А |
Production of reinforced foiled PTFE-4D sheets (FАF-4D). |
|
F-4D-E01-B |
Heat insulation in machines and devices performing welding thermoplastic materials type polyethylene, polyethylene-cellophane and other, with direct contact of “Bologna” fabric with heating element as process antiadhesion liner; anticorrosion insulation of steel fittings; insulation of electric machines; for membrane production; in transporter belts for transporting sticky and lightweight goods. |
|
F-4D-E01-V |
Slot insulation of electric equipment (for example, electric drills and as base for conveyor belts for infrared drying units in electronic production). |
|
F-4D-E007-А |
Base for antiadhesion fluoroplastic material with sticky layer; insulation of electric machines and wires, including slot insulation of electric motors for submersible pumps. |
|
F-4D-E007-B |
Antiadhesion, antifriction and electric insulating material. |
Normal parameters for various grades of varnished fabric:
|
Parameter |
Norm for grades |
||||
|
F-4D-E01-А |
F-4D-E01-B |
F-4D-E01-V |
F-4D-E007-А |
F-4D-E007-B |
|
|
Strength at break, MPa (kgf/cm2), not less |
78,4 |
68,6 |
68,6 |
63,7 |
58,8 |
|
(800) |
(700) |
(700) |
(650) |
(600) |
|
|
Volume resistance, Ohm*m, not less |
5*10+13 |
- |
- |
- |
- |
|
Dielectric loss tangent at frequency 1 mHz, not exceeding |
0,0007 |
- |
- |
- |
- |
|
Dielectric permeability at frequency 1 mHz, not exceeding |
2,5 |
- |
- |
- |
- |
|
Electric strength, kW/mm, not less: - constant voltage - alternating voltage |
62 |
25 |
30 |
- |
- |
|
- |
- |
- |
21 |
10 |
|
We offer wide selection of fluorovarnished fabrics and manufacture products per norms established by GOST and TU.
We produce varnished fabrics of all grades, including sizes not specified in the tables. In such case physical and chemical properties to be additionally stipulated.
Standard sizes of varnished fabrics are given in the table:
|
Sizes |
Norm for grades |
||||
|
F-4D-E01-А |
F-4D-E01-B |
F-4D-E01-V |
F-4D-E007-А |
F-4D-E007-B |
|
|
Thickness, mm |
0,2 |
0,2 |
0,2 |
0,09 |
0,09 |
|
Limit deviation in thickness, mm |
+0,02 |
+0,05 |
+0,03 |
+0,01 |
+0,03 |
|
-0,02 |
-0,07 |
-0,04 |
-0,02 |
-0,02 |
|
|
Width, mm, not less |
600 |
200 |
200 |
850 |
100 |
|
Length, m, not less |
10 |
0,5 |
25 |
25 |
0,9 |
|
Weight 1 m2, kg |
0,4¸0,5 |
0,25¸0,6 |
0,4¸0,5 |
0,18¸0,2 |
0,18¸0,22 |
Call us by telephone +7 (342) 259-07-74 to learn more on products available, prices and delivery terms.
Or submit telephone / email address through a form at our site, and our manager will contact You.
