Models	EPC6927 / EPC6925
Product Type	Low Dielectric LSZH High-Frequency Cable Compounds
Material Type	Thermoplastic LSZH / HFFR
Primary Application	Long-distance high-frequency signal cable
Shared Positioning	Low dielectric constant • Flame retardancy • Good processability
EPC6927 Profile	Dielectric constant 3.00 • tanδ 0.0040 • density 1.51 g/cm³
EPC6925 Profile	Dielectric constant 2.82 • tanδ 0.0063 • density 1.37 g/cm³
Shared Flame / Halogen Data	OI 30% • 0 ppm typical halogen content

Product Overview

EPC6927 and EPC6925 are Low Dielectric High-Frequency Cable Compound developed for long-distance high-frequency signal cable constructions. Both grades combine flame retardancy, good thermoplastic processability and relatively low dielectric constant for signal-transmission applications.

The Low Dielectric LSZH High-Frequency Cable Compounds provide two material profiles for cable designers. EPC6927 has the lower dielectric loss factor in the supplied data, while EPC6925 provides the lower dielectric constant, lower density and higher elongation. Final selection should be based on the cable's electrical design, attenuation target, mechanical requirements and extrusion conditions.

Why Choose EPC6927 or EPC6925?

1. Low-Dielectric Material Route

Both grades are specifically positioned for cable constructions requiring relatively low dielectric constant and are intended for long-distance high-frequency signal transmission applications.

2. EPC6927 - Lower Dielectric Loss Factor

EPC6927 has a typical dielectric constant of 3.00 and dielectric loss factor tanδ of 0.0040, the lower tanδ of the two grades.

3. EPC6925 - Lower Dielectric Constant

EPC6925 has a typical dielectric constant of 2.82, together with lower density of 1.37 g/cm³ and higher elongation of 260%.

4. LSZH / HFFR Performance

Both grades have a typical oxygen index of 30% and typical halogen content of 0 ppm.

5. Balanced Mechanical Performance

EPC6927 provides 12.5 MPa tensile strength and 220% elongation; EPC6925 provides 12.8 MPa and 260%.

6. Thermoplastic Processing

Both grades can be processed on conventional PVC/PE cable extrusion equipment without post-extrusion irradiation.

Typical Applications

Long-distance high-frequency signal cables
High-frequency data / signal transmission cable constructions
Communication cables requiring lower dielectric constant
Signal cables where dielectric loss must be considered
LSZH / HFFR high-frequency cable sheathing applications
Customized cable constructions requiring electrical / mechanical balance

EPC6927 vs. EPC6925 - Quick Selection

Selection Point	EPC6927	EPC6925
Dielectric Constant ε	3.00	2.82
Dielectric Loss Factor tanδ	0.0040	0.0063
Density	1.51 g/cm³	1.37 g/cm³
Tensile / Elongation	12.5 MPa / 220%	12.8 MPa / 260%
Choose When	Lower dielectric loss factor is the stronger priority	Lower dielectric constant, lower density or higher elongation is preferred

Recommended Extrusion Process Temperature

Property	EPC6927
Density	1.51 g/cm³
Melt Index	6.5 g/10 min
Tensile Strength	12.5 MPa
Elongation at Break	220%
Aging Test	110°C × 168 h
Tensile after Aging	14.2 MPa
Elongation after Aging	206%
Oxygen Index	30%
Smoke Density - Flaming	58
Smoke Density - Non-Flaming	198
Hardness	Shore A 98
High-Temperature Pressure Test	90°C × 4 h
Thermal Deformation	10%
Low-Temperature Impact @ -25°C	Pass
Thermal Shock @ 150°C	Pass
Halogen Content	0 ppm
pH	6.2
Conductivity	0.8 μS/mm
Dielectric Constant ε	3.00
Dielectric Loss Factor tanδ	0.0040
Volume Resistivity	1.3 × 10¹³ Ω·m

EPC6927 / EPC6925 Performance Comparison

Performance Area	EPC6927 / EPC6925 Positioning
Electrical	Low dielectric constant; grade-specific dielectric loss profiles
Flame retardancy	OI 30% for both grades
Halogen	0 ppm typical for both grades
Mechanical	12.5–12.8 MPa tensile / 220–260% elongation
Low temperature	-25°C impact: Pass
Thermal shock	150°C: Pass
Processing	Thermoplastic extrusion; no irradiation

Recommended Extrusion Conditions

Zone	Zone 1	Zone 2	Zone 3	Zone 4	Zone 5	Neck	Head	Mould
Temperature	100°C	110°C	125°C	135°C	150°C	155°C	160°C	165°C

Processing Guidelines

EPC6927 and EPC6925 can be processed on conventional PVC/PE cable extrusion equipment.
Recommended profile: 100°C / 110°C / 125°C / 135°C / 150°C / 155°C / 160°C / 165°C.
Keep melt temperature below approximately 165°C and do not exceed 175°C during extrusion.
A low-compression screw and head are recommended, with a compression ratio around 1:1.2.
Optimize die design, cooling and line speed according to cable diameter, layer thickness and signal-transmission design.
Final electrical performance should be validated on the customer's complete cable construction.

How to Choose Between EPC6927 and EPC6925

Selection Point	EPC6927	EPC6925	Selection Logic
Dielectric constant	3.00	2.82	EPC6925 is lower
Dielectric loss tanδ	0.0040	0.0063	EPC6927 is lower
Density	1.51	1.37	EPC6925 is lower
Elongation	220%	260%	EPC6925 is higher
Primary starting point	Lower dielectric loss priority	Lower dielectric constant / density priority	Validate on finished cable

Choose EPC6927 When Dielectric Loss Is the Priority

Selection Point	EPC6927	EPC6925
Core strength	Lower dielectric loss factor	Lower dielectric constant
tanδ	0.0040	0.0063
ε	3.00	2.82
Density	1.51 g/cm³	1.37 g/cm³
Elongation	220%	260%
Best fit	Loss-factor-sensitive design	Lower-ε / lighter / higher-elongation design

Choose EPC6925 When Lower Dielectric Constant Is the Priority

Selection Point	Low-Dielectric Page	Standard Communication Sheathing Page
Primary intent	High-frequency signal transmission material	General communication cable outer sheath
Key metrics	Dielectric constant + tanδ	CPR / flame / mechanical properties
Models	EPC6927 / EPC6925	EPC6907 / 6908 / 6910 / 6906
Selection basis	Electrical design + finished-cable transmission tests	Target CPR route + finished-cable tests
SEO boundary	Low dielectric / high frequency / signal	Communication sheath / CPR

Important High-Frequency Cable Selection Note

Dielectric constant and dielectric loss factor are material-level indicators. Actual attenuation, impedance and high-frequency transmission performance depend on the complete cable structure, conductor geometry, insulation / sheath design and processing quality. Final selection should therefore be confirmed through finished-cable testing.

Free Sample & Technical Support

For faster grade selection and trial evaluation, please provide:

Cable type and high-frequency signal application
Target frequency range
Required dielectric constant / dielectric loss target
Finished-cable attenuation or impedance requirements
Cable construction and layer thickness
Mechanical / flexibility requirements
LSZH / flame-retardant requirements
Extrusion equipment and line speed
Color and surface requirements
Trial quantity and estimated annual volume

FAQ

Q: What are EPC6927 and EPC6925?

A: They are Low Dielectric LSZH High-Frequency Cable Compounds for long-distance high-frequency signal cable constructions.

Q: What is the main difference between EPC6927 and EPC6925?

A: EPC6927 has the lower dielectric loss factor, while EPC6925 has the lower dielectric constant, lower density and higher elongation.

Q: Which grade has the lower dielectric constant?

A: EPC6925. Its typical dielectric constant is 2.82, compared with 3.00 for EPC6927.

Q: Which grade has the lower dielectric loss factor?

A: EPC6927. Its typical tanδ is 0.0040, compared with 0.0063 for EPC6925.

Q: Are both grades LSZH / HFFR?

A: Both grades are positioned as low-smoke zero-halogen flame-retardant cable compounds, with 0 ppm typical halogen content in the supplied data.

Q: What is the typical oxygen index?

A: Both EPC6927 and EPC6925 have a typical oxygen index of 30%.

Q: Which grade has higher elongation?

A: EPC6925 has 260% elongation at break, compared with 220% for EPC6927.

Q: Do the grades require irradiation?

A: No. Both are thermoplastic extrusion compounds.

Q: Can material dielectric data guarantee finished-cable transmission performance?

A: No. Finished-cable performance also depends on the complete cable structure, geometry, processing and other materials.

Q: Can I request both grades for comparison?

A: Yes. Comparative extrusion and finished-cable electrical testing are recommended when both grades appear suitable.

Need a Low Dielectric High-Frequency Cable Compound?

Send us your cable structure, target frequency, dielectric requirements, attenuation / impedance targets, extrusion conditions and trial quantity. We can help compare EPC6927 and EPC6925.

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