PTFE composition products

PTFE-4 BASED ANTIFRICTION COMPOSITIONS, BLANKS FROM PTFE COMPOSITIONS

Polymer Company offers rods, sheets and sleeves of PTFE-4 and its compositions, able to sustain working temperature in range from -60С to +260С.

Compositions are introduced to improve parameters of heat conductivity, hardness, abrasion resistance, reduce thermal expansion coefficient and reduce degree of product deformation under load. All compositions are tolerant to PTFE processing temperature (360°C).

Popular fillers for PTFE-4 are inorganic materials: finely ground coke, asbestos, graphite, bronze, molybdenum disulfide, carbon fiber, glass fiber, boron nitride, quartz, carbon black, finely ground zirconium, potassium titanate, calcium fluoride.

Application of PTFE-4 compositions in production of rods, sleeves and sheets by compaction and mechanical processing permits to obtain high quality products possessing antifriction properties — sliding friction bearings, piston rings, sealing cuffs, filters, valve diaphragms, packer rings, etc.

Selection of filler and its percentage depends on product application conditions: temperature, speed, loads, wet or dry operation conditions, and other factors.

Conditions of application of the compositions are given in table below:

Application of PTFE based composite materials
F-4К20	For making various antifriction products, including piston rings, sliding friction bearings, sealing cuffs and other products operating at temperature from –60 to +250ºС.
F-4К15М5
F-4S15	Used in conditions of frequent shock loads, especially for various structural units
F-4UV15	Used for production of sealing and bearing elements, friction units, working in general purpose compressors or other machines and devices with limited lubrication and without lubrication.
AFGM	For dry gas compressors
AFG-80VS	For wet gas compressors
F-4КS2	For production of various antifriction moving gaskets and fixed parts, including bearings with increased run-in speed, with high elasticity, heat and chemical resistance

Properties of PTFE compositions:

Material properties
Parameter	F-4К20	F-4К15М5	F-4S15	F-4UV15	AFGM	AFG-80VS	F-4КS2
Density, kg/m3	2050-2170	2100-2180	2170-2210	1950	2100-2300	2000-2100	2150
Rupture stress, MPa	11,8-14,6	13,7-17,1	9,8-17,1	15-18	9-Aug	7-Jun	24,5-26,4
Relative elongation at rupture, %	120-160	150-200	150-300	60	10	40-60	250-300
Module of resilience, MPa
at compression	805	800	520	-	70-100	60-90	430
at extension	1500	-	480	-	-	-	360
Brinell hardness, MPA	49-53,8	49	39-43		59-140	59-93	37-39
Deformation under load 10 MPa (24 h. 22ºС), %	2,9-3,0	3,5-4,0	3,0-4,0	-	-	-	6
Stress at deformation 10%, MPa	21,5	20	19,5-20,5	-	-	-	15
Heat conductivity coefficient, W/(m*К)	0,23	0,29	0,25	-	2,3	0,7-1,1	-
Specific heat capacity, J/(kg*К)	0,71	-	0,9	-	-	-	-
Linear expansion coefficient х10-5, ºС -1
from –60 to +20	11-Aug	-	4,5-12,5	-	-	-
from –30 to +250	18-Nov	-	12,5-9,5	-	-	-
Vicat temperature, ºС	145-160	-	130-140	-	-	-	-
Water intake in 24 ч, %	0,03	-	0,04	0,01	0-0,1	0-0,2	-
Limit PV, KPa*m/sec
at V= 0,05 m/sec	490	588	343	-	-	-	-
at V= 0,5 m/sec	687	687	412	-	-	-	-
at V= 5 m/sec	1078	1078	542	-	-	-	-
Wear rate,
mkg/sec	0,25-0,56	0,18-0,22	0,56-0,83				22
mm/km (after 3 h)	0,03	0,02	0,05				-
Coefficient of friction against steel	0,14-0,30	0,1-0,39	0,15-0,30	-	-	-	-
Working tempertature range	From –60 to +250	From –60 to +250	From –60 to +250	From –60 to +250	From –60 to +250	From –60 to +250

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.