GEHR E-CTFE®

Chemical Family: Fluoropolymers

GEHR E-CTFE® is a linear block copolymer and belongs to the group of amorphous high-performance plastics. It is highly UV and weather resistant and also withstands high-energy (radioactive) radiation. Ethylen-Chlortrifluorethylene exhibits an extraordinary impact strength at temperatures ranging from -76 °C to +150 °C. A great part of the product properties attributes to the very smooth surface and differentiates HALAR® from other fluoropolymers. Due to the fact that E-CTFE is very pure, this material is being used to process chemicals and ultrapure water for the semiconductor industry. Also the permeation resistance to oxygen, carbon dioxide, chlorine gas and hydrochlorid acid is 10 to 100 times better than PTFE.

Properties

Physical Form: Custom

Other characteristics

Brand: GEHR E-CTFE
Color: Natural
Density: 1710.0 - 1710.0 kg/m³
Features: Amorphous, Chemical Resistant, Excellent Performance, Good Impact Strength, Good Sliding Properties, Good Smoothness, Good UV Resistance, Good Weather Stability, High Density, High Gas Permeability, High Temperature Insulation Properties, Radiation Resistant
Polymer Name: Ethylene Chlorotrifluoroethylene Copolymer
Odor: Odorless
Markets: Agriculture & Feed
Automotive & Transportation
Building & Construction
Consumer Goods
Electrical & Electronics
Industrial
Storage: The products shall be stored indoor to keep away from any source of degradation such as sunlight, UV-jets, ionizing radiation, chemicals.
Machining: The product can be machined with standard machinery and tools. Before machining the product should be stored at room temperature 24 h. Evacuate swarf to prevent slipping or tripping. Observe the maximum allowable concentration of dust and formaldehyd levels on the working area which apply in your country. Wear safety goggles during machining. General dust limit value: Respirable dust (6 mg/m3); Inhalable dust (10 mg/m3 ).
Properties: Extremely high impact strength (down to -76 °C); Good insulation properties; Very good weather resistance; High resistance to radiation; Very high chemical resistance; Very good sliding properties; Physiologically harmless; High density; Limited protection against stress cracking at temperatures > 140 °C
Flame Rating: UL 94 V0
Insoluble In: Water
Technology: Plastics
Safety Measures: The general industrial safety measures should be considered. A thermal damage during machining should be avoided.
Product Families: Plastics — Parts, Shapes & Films
Form and Condition: Rods / Solid

Technical data

Table 1 of 6

10 rows

Characteristic	Value	Unit	Method
Tensile Strength at Yield	30	MPa	ISO 527
Elongation at Yield (S)	5	%	ISO 527
Tensile Strength at Break	47	MPa	ISO 527
Elongation at Break (R)	250	%	ISO 527
Impact Strength (an)	No break	kJ/m2	ISO 179
Notch impact Strength (ak)	n.b.	kJ/m2	ISO 179
Ball Indentation (Rockwell Hardness)	R 90	MPa	ISO 2039
Hardness	69	Shore D	ISO 868
Flexural Strength (B 3,5 %)	54	MPa	ISO 178
Modulus of elasticity (Et)	1845	MPa	ISO 527

Table 2 of 6

4 rows

Characteristic	Value	Unit	Method
Specific Gravity	1.71	—	ISO 1183
Water Absorption	0.7	%	ISO 62
Maximum Permissible Service Temperature	150	°C	UL746B
Lower Permissible Service Temperature	-76	°C	UL746B

Table 3 of 6

7 rows

Characteristic	Value	Unit	Method
Heat Deflection Temperature (HDT/B)	82	°C	ISO 75
Heat Deflection Temperature (HDT/A)	158	°C	ISO 75
Heat Deflection Temperature (HDT/A)	78	°C	ISO 75
Coefficient of Linear Thermal Expansion	0.9	K-1.10-4	ISO 11359
Thermal Conductivity (20°C)	0.15	W/(m.K)	ISO 22007-4
Glass Transition Temperature (Tg)	85	°C	ISO 3146
Melting Temperature (Tm)	230	°C	ISO 3146

Table 4 of 6

3 rows

Characteristic	Value	Unit
Density	1.71	g/cm³
Melting Temperature	220 - 230	°C
Thermal Decomposition	min. 350	°C

Table 5 of 6

5 rows

Characteristic	Value	Unit	Method
Volume Resistivity	min. 10^13	Ω.cm	IEC 60093
Surface Resistivity (Ro)	min. 10^12	Ω	IEC 60093
Dielectric Constant (1MHz)	2.6	—	IEC 60250
Dielectric Strength	15	kV/mm	IEC 60243-1
Tracking Resistance	CTI 600	V	IEC 60112

Table 6 of 6