{"id":75281,"date":"2017-03-08T05:35:49","date_gmt":"2017-03-08T05:35:49","guid":{"rendered":"http:\/\/ptfe-machinery.com\/?p=75281"},"modified":"2017-03-08T05:35:49","modified_gmt":"2017-03-08T05:35:49","slug":"typical-properties-fluoropolymers","status":"publish","type":"post","link":"https:\/\/ptfe-machinery.com\/ru\/typical-properties-fluoropolymers\/","title":{"rendered":"Typical Properties of Fluoropolymers"},"content":{"rendered":"\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Property<\/strong><\/td>\nMethod No.<\/strong><\/td>\nUnits<\/strong><\/td>\n\u041f\u0422\u0424\u042d<\/strong><\/td>\nFEP<\/strong><\/td>\nPFA<\/strong><\/td>\nETFE<\/strong><\/td>\nECTFE<\/strong><\/td>\nPCTFE<\/strong><\/td>\nPVDF<\/strong><\/td>\n<\/tr>\n
Specific Gravity<\/td>\nD792<\/td>\n–<\/td>\n2.17<\/td>\n2.15<\/td>\n2.15<\/td>\n1.74<\/td>\n1.7<\/td>\n1.7<\/td>\n1.78<\/td>\n<\/tr>\n
Melting Point<\/td>\nD2236<\/td>\ndeg F
\ndeg C<\/td>\n		621
\n327<\/td>\n		518
\n270<\/td>\n		581
\n305<\/td>\n		527
\n275<\/td>\n		464
\n240<\/td>\n		410
\n210<\/td>\n		352
\n177<\/td>\n<\/tr>\n
Tensile Strength<\/td>\nD638
\nD1708
\nD1457<\/td>\n		psi
\nMPa<\/td>\n		2500
\n17<\/td>\n		3400
\n23<\/td>\n		4,000
\n27<\/td>\n		6,960
\n48<\/td>\n		6,960
\n48<\/td>\n		6,060
\n41.78<\/td>\n		7,830
\n54<\/td>\n<\/tr>\n
Yield Strength<\/td>\nD638<\/td>\npsi<\/td>\n1,450<\/td>\n1,740<\/td>\n2,250<\/td>\n3,480<\/td>\n4,500<\/td>\n5,800<\/td>\n6,670<\/td>\n<\/tr>\n
Elongation<\/td>\n<\/td>\n%<\/td>\n200-500<\/td>\n250-350<\/td>\n300<\/td>\n200-500<\/td>\n200-300<\/td>\n80-250<\/td>\n20-150<\/td>\n<\/tr>\n
Tensile Modulus<\/td>\nD638<\/td>\nksi<\/td>\n87<\/td>\n72.5<\/td>\n101.5<\/td>\n217.5<\/td>\n240<\/td>\n218<\/td>\n348<\/td>\n<\/tr>\n
Flex Modulus<\/td>\nD790<\/td>\npsi x 1000
\nMPa<\/td>\n		98
\n675<\/td>\n		101.5
\n700<\/td>\n		95
\n655<\/td>\n		203
\n1400<\/td>\n		261
\n1800<\/td>\n		–<\/td>\n333.5
\n2300<\/td>\n<\/tr>\n
Izod Impact<\/td>\nD256<\/td>\nft-lbs\/in
\nJ\/m<\/td>\n		3.2
\n173<\/td>\n		No Break<\/td>\nNo Break<\/td>\nNo Break<\/td>\n–<\/td>\n–<\/td>\n2-4<\/td>\n<\/tr>\n
Hardness<\/td>\nD2240<\/td>\nShore D<\/td>\n60<\/td>\n57<\/td>\n62<\/td>\n75<\/td>\n75<\/td>\n90<\/td>\n79<\/td>\n<\/tr>\n
HDT, @ 66 psi<\/td>\nD648<\/td>\ndeg F<\/td>\n250<\/td>\n158<\/td>\n164<\/td>\n219<\/td>\n240<\/td>\n248<\/td>\n300<\/td>\n<\/tr>\n
HDT, @ 264 psi<\/td>\nD648<\/td>\ndeg F<\/td>\n122<\/td>\n129<\/td>\n118<\/td>\n160<\/td>\n169<\/td>\n–<\/td>\n239<\/td>\n<\/tr>\n
Max. Cont Use Temp<\/td>\n<\/td>\ndeg F
\ndeg C<\/td>\n		500
\n260<\/td>\n		400
\n204<\/td>\n		500
\n260<\/td>\n		300
\n149<\/td>\n		<\/td>\n<\/td>\n<\/td>\n<\/tr>\n
*Flame Rating<\/td>\nUL 94<\/td>\n<\/td>\nVO<\/td>\nVO<\/td>\nVO<\/td>\nVO<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/tr>\n
Limiting Oxygen Index<\/td>\nD2863<\/td>\n%<\/td>\n>95<\/td>\n>95<\/td>\n>95<\/td>\n30-36<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/tr>\n
Thermal Conductivity<\/td>\n<\/td>\nBtu\u00b7in\/h\u00b7ft2\u00b7\u00b0F
\nW\/m\u00b7K<\/td>\n		1.7
\n0.25<\/td>\n		1.4
\n0.20<\/td>\n		1.3
\n0.19<\/td>\n		1.65
\n0.24<\/td>\n		<\/td>\n<\/td>\n<\/td>\n<\/tr>\n
Dielectric Constant<\/td>\nD150<\/td>\n1 MHZ<\/td>\n2.1<\/td>\n2.1<\/td>\n2.1<\/td>\n2.6<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/tr>\n
**Dielectric Strength<\/td>\nD149<\/td>\nVolts\/\u00b5m<\/td>\n18<\/td>\n53<\/td>\n80<\/td>\n79<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/tr>\n
Resistivity – Volume<\/td>\nD257<\/td>\nohm-cm<\/td>\n>1018<\/td>\n>1018<\/td>\n>1018<\/td>\n>1017<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

PTFE Properties:<\/h2>\n

The Steel Industry and Chemical Processing Industry have been using fluoropolymer tubing products from materials like PTFE and hoses for many years for transferring highly caustic or corrosive chemicals. More and more, PTFE tubing is replacing carbon and other metal piping that deteriorates rapidly. Now and for the future, PTFE will continue to serve the industry in critical applications.<\/p>\n

PTFE Thermal Qualities:
\nPTFE tubing can withstand temperatures up to 680 \u00b0F for limited periods of time.* Under cryogenic conditions, PTFE remains strong down to -320 \u00b0F.<\/p>\n

*Above 500 \u00b0F, mechanical properties become a limiting factor<\/p>\n

PTFE Electrical Qualities:
\nPTFE tubing has superb electrical properties, indicated by a low dielectric constant of 2.1 between -40 \u00b0F and 480 \u00b0F within a frequency range of 5 Hz to 10 GHz.<\/p>\n

PTFE tubing is also an excellent insulator with surface resistivity of 3.6 X 1012 ohms (even at 100% relative humidity).<\/p>\n

Short time dielectric strengths range from 500 volts\/mil (1 mil = 10-3 in) for thicknesses greater than 100 mils to 4000 volts\/mil for very thin films.<\/p>\n

FEP Properties:<\/h2>\n

Electrical FEP exhibits most of the properties of PTFE. However, because of its excellent electrical FEP properties, FEP tubing is a valuable and versatile electrical insulator.<\/p>\n

Chemical FEP tubing is inert to most chemicals and solvents, similar to PTFE<\/p>\n

Weathering FEP tubing products are virtually unaffected by weather elements. Its resistance to extreme heat, cold, and UV radiation further suits FEP properties for electronic applications.<\/p>\n

ETFE Properties<\/h2>\n

ETFE is distinguished from perfluopolymers (totally fluorinated polymers) as a partially fluorinated copolymer of ethylene and TFE. This chemical modification provides significantly higher strength relative to PTFE, FEP or PFA. It is less flexible than PTFE, but has superior impact strength, abrasion and cut through resistance. Addition of a third component to the chemical structure creates a modified ETFE that has lower weight per unit volume, is stiffer and tougher than PTFE, PFA or FEP. These properties allow it to withstand greater physical abuse during its lifetime. For example, glass reinforced ETFE has outstanding wear characteristics and may be used for bearing applications. ETFE is also suitable for pump impellers or moving parts of equipment that are operating in chemically aggressive environments (check to ensure chemical compatibility).<\/p>\n

PVDF Properties<\/h2>\n

PVDF (KYNAR\u00ae) is generally used in applications requiring the high purity, strength, and resistance to solvents, acids, bases and heat. Compared to other fluoropolymers, like PTFE, PFA, FEP, it has an easier melt process because of its relatively low melting point of around 177\u00b0C.<\/p>\n

PCTFE Properties<\/h2>\n

PCTFE or CTFE (originally known as Kel-F*) has many of the properties similar to other fluoropolymers such as PTFE, FEP or PFA, but is mechanically superior in rigidity (does not deform easily), and has very low gas permeability . Its dimensional stability makes it attractive for use as a component of a structural part where the high temperature and chemical resistance of fluoropolymers is required. PCTFE shows high compressive strength and low deformation under load. However, its relative cost is one of the major considerations in its selection, since it is quite expensive.<\/p>","protected":false},"excerpt":{"rendered":"

Property Method No. Units PTFE FEP PFA ETFE ECTFE PCTFE PVDF Specific Gravity D792 – 2.17 2.15 2.15 1.74 1.7 1.7 1.78 Melting Point D2236 …<\/p>","protected":false},"author":1,"featured_media":75282,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[85],"tags":[89,90,87,84,88],"class_list":["post-75281","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-fluoropolymers","tag-etfe","tag-fep","tag-pctfe","tag-ptfe","tag-pvdf"],"yoast_head":"\nTypical Properties of Fluoropolymers - PTFE Machinery<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/ptfe-machinery.com\/ru\/typical-properties-fluoropolymers\/\" \/>\n<meta property=\"og:locale\" content=\"ru_RU\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" 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