PTFE Stop Cock, Ptfe Laboratory Item, PTFE Plate, PTFE Laboratory Item, Ptfe Compressor Spares, PTFE Tubing Manufacturers, PTFE Tape Suppliers, Ahmedabad, Gujarat, India

Advantage of PTFE

  • Heat : PTFE retains its properties after exposure to temperatures beyond the limit of almost all other thermoplastics and elastomers. Depending on the end use requirements, PTFE is rated for continuous service at temperatures as high as 500 F. It can also sustain short exposure at higher temperature.
  • Flame resistance : PTFE offers extraordinary resistance to high temperature and flames because it has a very high melting point and auto ignition temperature, as well as exceptional thermal degradation thresholds. PTFE's flame propagation characteristics, such as rate of heat release and smoke generation is very low.
  • Friction and wear : PTFE has one of the lowest coefficients of friction of any solid material. Its abrasions resistance is adaptable to demanding environments by using inorganic fillers such as glass fiber, carbon or graphite.
  • Contamination : PTFE is chemically pure and inert. It contains no additives such as lubricants, stabilizers, plasticizers or antioxidants that can contaminate process fluids.
  • Adhesion/Release : PTFE has an extremely low surface energy in the solid state. This provides an excellent anti-stick, non-wetting contact surface. Conversely, when these resins are in a molten form, they become low surface-tension liquids, ideal for hot melt adhesives.
  • Low temperature service : PTFE retains its excellent properties even at cryogenic temperatures. PTFE's impact resistance at these temperatures exceeds that of most other polymers.
  • Service life : PTFE exhibits excellent retention of properties after a long period of time, even at elevated temperatures and in the presence of oils, solvents, UV light, oxidizing agents and other environmental agents.
  • Light stability : PTFE has one of the lowest refractive indexes. It does not change its visual appearance after exposure to ultraviolet or infrared light.
  • Dielectrics : PTFE has remarkable dielectric strength, low dielectric constant, low loss factors and high specific resistance. PTFE surpasses most material in its level and stability of dielectric properties over a wide range of environmental conditions.
  • Biodegradation : PTFE is inert to microbiological and enzymic attack because the pure polymer does not provide any nourishment or porosity for these growths.
  • Atmospheric aging : PTFE is not affected by ultraviolet and is resistant to oxidation, discoloration, and embitterment.
  • Humidity : PTFE is completely resistant to hydrolysis. PTFE is a good barrier for water permeation. Its typical properties and dimensional stability remain unchanged even after long periods of time in water.

GENERAL CHARACTERISTICS 100% PURE PTFE

Granular Powder :

Powder :

  • Bulk density
    • Standards : D-1457
    • Units : g/1
    • Pure PTFE : 700 ± 100
  • Compression ratio
    • Standards : -
    • Units : -
    • Pure PTFE : 2.5 – 3
  • Particle size
    • Standards : D-1457
    • Units : -
    • Pure PTFE : ~ 400
  • Pourability
    • Standards : D-1895
    • Units : s
    • Pure PTFE : 30 – 50
  • Moulding pressure
    • Standards : -
    • Units : kg/cm 2 , Psi , MPa
    • Pure PTFE : 250 – 350 , 3500 - 5000 , 25 - 35

SINTERED PARTS :

  • Specific gravity
    • Standards : D-1457
    • Units : -
    • Pure PTFE : 2.14 – 2.16
  • Shrinkage
    • Standards : D-1457
    • Units : %
    • Pure PTFE : -3.5/-4.5
  • Tensile strength
    • Standards : D-1457
    • Units : kg/cm , Psi , MPa
    • Pure PTFE : 250 – 310 , 3500 – 4400 , 25 – 30
  • Elongation
    • Standards : D-1457
    • Units : %
    • Pure PTFE : 280 – 380
  • Thermal stability
    • Standards : D-1457
    • Units : -
    • Pure PTFE : 10
  • Dielectric strength
    • Standards : D-1457 , 0.1 mm
    • Units : kv/mm , v/mil
    • Pure PTFE : ~ 32 , ~ 800
  • Harness
    • Standards : D-2240
    • Units : Shore D
    • Pure PTFE : 55 – 58
  • Water absorption
    • Pure PTFE : 0%

GRANULAR POWDER :

Compounds, properties and Application
A=properties
B=Examples of Application

  • Carbon
    • A - Good Thermal Conductivity
    • B - Dynamic applications at high Speed
  • Graphite
    • A - Good resistance to Wear, improved thermal Conductivity
    • B - Creeping bearings at high speed contact with medium hardness
  • Glass
    • A - High resistance to wear, improved under load and permanent deformation
    • B - Bearings with high resistance to wear, Valve seats
  • MOS2
    • A - Low static coefficient of friction
    • B - Creeping slides used at high stresses
  • Bronze
    • A - High resistance to compression, High thermal conductivity
    • B - Support Slides for heavy loads
  • Alumina Al
    • A - Improved under load and permanent deformation Good dielectric properties
    • B - Electrical applications
Propeties
Test
Method
(ASTM)
Units
Carbon
Carbon
Gra-phite
Glass
Glass
Glass
Bronze
Bronze
Alu-mina
Alu-mina
Filler Content
(% wt)
-
-
25%
35%
15%
25%
15%
Mos2
60%
40%
7%
15%
Specific Gravity
D1457
-
2.09
to
2.11
2.01
to
2.05
2.13
to
2.18
2.22
to
2.25
2.20
to
2.23
2.22
to
2.32
3.85
to
3.95
3.10
to
3.22
2.20
to
2.2
2.28
to
2.40
Bulk Density
D1457
g/I
425
±
25
500
±
40
500
±
40
475
±
50
-
-
1050
±
50
900
±
50
-
-
Tensile strength
D1457
kg/cm
190
to
210
115
to
130
140
to
210
130
to
150
170
to
240
200
to
240
125
to
150
180
to
240
240
180
Elognation
D1457
%
110
to
160
35
to
50
100
to
180
210
to
270
270
to
350
240
to
320
150
to
200
180
to
240
260
290
Hardness
D2240
ShoreD
71
to
73
72
to
74
62
to
65
66
to
68
64
to
66
64
71
to
73
67
to
69
64
66
Recommended
Moulding Pressure
-
kg/cm
500
500
500
500
500
500
500
500
500
500
Sintering Temp.
(Recommended)
-
c
375
375
375
375
375
375
375
375
375
375
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