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(выдержка из "Концепции развития промышленного комплекса Санкт-Петербурга на период до 2020 года")

 
About fluoropolymer

Polytetrafluorethylene is a polymer material, a product of polymerization of tetrafluorethylene.

 

Fluoropolymer. Polytetrafluorethylene

Chemical formula - (—CF2CF2—)n.

Analogues: TEFLON 7, FLUON G 163,190, ALGOFLON F, HOSTAFLON TF 1702, POLYFLON M 12, 14

Polytetrafluorethylene – polymer material, a product of tetrafluorethylene polymerization.

 

Due to its chemical structure (twisting of a carbon chain and big Van-der-Vaals radius of atoms of fluorine and high durability of connections of atoms of fluorine and carbon) polytetrafluorethylene has an exclusive chemical stability and a number of other positive properties favourably distinguishing the given material. It is stable practically against all acids, alkalis, organic and non-organic solvents, mineral oils in a wide interval of temperatures (from - 269°С to plus 260°С), with an exception of flux alkaline metals, three-fluoric chlorine and elementary fluorine. Unsurpassed chemical stability PTFE allows to use the given material in the chemical industry for manufacturing of various details of chemical equipment, capacities, pipelines, membranes, packings, sealing elements, pumps. Biological inertness of the given material has ensured wide application of the given material in medical, pharmaceutical and the food-processing industry. In medicine in particular, artificial limbs of blood vessels, implants and suture materials made of PTFE are widely applied.

 

High thermal stability in combination with excellent dielectric characteristics of the material allows applying it in electro- and radio engineering as isolation of wires, cables of cutoff points for production of boards, isolation and details of electric machines and in microwave technics.

 

Fluoropolymer has very low factor of friction, it is practically not moistened with water and organic liquids. That in combination with a wide temperature range of exploitation, quite good mechanical and antiadhesive properties, equality of the static and dynamic moments of friction makes the given material irreplaceable in machine building as antifriction and lining material.

 

To increase hardness, heat conductivity, wear resistance, decrease cold fluidity and factor of thermal expansion, various filling are added to PTFE. Composite materials on the basis of polytetrafluorethylene…

 

Main characteristics of Polytetrafluorethylene (F-4) of the mark “PN” State Standard 10007-80

 

Characteristics
Value
Density, g/cm3, not more than
2,19
Durability at rupture of non-tempered sample, MPa (kgs/cm2), not less than
25,0 (250)
Relative lengthening at rupture of non-tempered sample, %, not less than
350
Electric durability (thickness of a sample 0,100±0,005 mm) at constant pressure, kW/mm, not less than
50
Relative lengthening at rupture planed tape in a cross-section direction, %, not less than
Is not defined
 
Main characteristics of Polytetrafluorethylene (F-4) of the mark “PN” State Standard 10007-80
 
Density, kg/m3
2120-2200
Melting temperature of crystallites, °С
327
Temperature of glass transition, °С
-120
Heat-resistance on Vica, °С
110
Specific thermal capacity, kilojoule/(kg*K)
1,04
Coefficient of thermal conductivity, W/(m*K)
0,25
Temperature coefficient of linear expansion *10-5, °С-1
8-25
Working temperature minimum, °С
-269
Working temperature maximum, °С
260
Water absorption for 24 hours, %
0,00
Breaking point at stretching, MPa
• Usual sample
• Tempered sample
 
· 14,7-34,5
· 15,7-30,9
Lengthening at rupture, %
• Relative
• Residual
 
· 250-500
· 250-350
Elasticity module, MPa
• At stretching
• At compression
• at 20°С
• at-60°C
 
· 410
· 686,5
· 460,9-833,6
· 1294,5-2726,5
Breaking point, MPa
• At compression
• At a static bend
 
11,8
10,7-13,7
Hardness on Brinnel, Mpa
29,4-39,2
Friction factor on steel
0,04
Specific volume electric resistance, Om*m
1015-1018
Specific superficial electric resistance, more, Om
1*1017
Tangent of angle of dielectric losses
• at 1 kHz
• at 1 MHz
 
· (2-2,5)*104
· (2-2,5)*104
Dielectric permeability
• at 1 kHz
• at 1 MHz
 
· 1,9-2,1
· 1,9-2,1
Electric durability (thickness of a sample of 4 mm), MW/m
25-27
Arc resistance, c
250-700 (constant conductive layer is not created)
Temperature of decomposition, more, °С
415
Thermostability (420°С, 3h), %
0,2
Firmness to action of chemical reagents at 20-150°С
• acids concentrated
• organic solvents
• alkalis
• oxidizers (hydrogen peroxide)
 
· Resistant
· Resistant
· Resistant
· Resistant
Combustibility on an oxygen index, %
95
Atmosphere resistance
Excellent
Firmness to an irradiation, Gr
(0,5-2)*104
Firmness to fungi (SS 9.049-75, method A), points
1
 
 
 

 

 

 

Production
Optical and lighting products: lenses, light-signal segments, side light details of thermoplastic for automobiles
Techware: electrotechnical cases, dowels, brackets, bushings, shoes of thermoplastics
Casewoods for domestic appliances of thermoplastics
MIC production: insulators, individual first-aid sets, pins, washer for felt thermal protection fastening of thermoplastics
Consumer goods of thermoplastics
Package and packing of thermoplastics
Price-list of thermoplastic products
 
Plates, rods, rings and bushings of polytetrafluorethylene and of compositions based on fluoropolymer
Sealing materials of polytetrafluorethylene-D: tape and plait of fluoropolymer sealing material
Electrical insulating and forcing tubes of polytetrafluorethylene-D
Tubes of polytetrafluorethylene-D
Planed tape of polytetrafluorethylene-D and compositions based on fluoropolymer
Blocks of polytetrafluorethylene-D
Porous joint plait “Komplast” of fluoropolymer
Close-toleranced dimension products of polytetrafluorethylene-A
About fluoropolymer
Price list of fluoropolymer products
 
Brake blocks for drilling rigs of thermosetting plastics
Electrotechnics of thermosetting plastics
Ware accessories of thermosetting plastics
Thermosetting plastics processing
Price list of thermosetting plastic products
 
Keyboard details of silicone
Joint rings of silicone
Price list of silicone products
 
Shock-absorber packing for points
Noise reduction bushes of rubber
Escalator step rubber-bonded traveler
Silentblocks, diesel pillow of rubber
Joint rings of rubber
Price list of products of rubber
 
High-tensile products of UHMWPE
Pressed plated of UHMWPE
Extrusion billets: rods, tubes, rings, bushings
Supporting rollers of conveyer belts of UHMWPE
Brackets for conveyer belt scrapers
Details of freight car bogie (friction, antifriction details)
Details of passenger car bogie (antifriction details)
Bush of side bearing pad of passenger car bogie bolster
Details of block joints for R65 type railing
Driving roller for escalators
Escalator step rubber-bonded traveler
Guide of escalator hand-rail
Price-list of UHMWPE products
 
UHMWPE coatings of metal and concrete. Flame spraying
Foamed polyurethane coverings
 
 
 
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