Model	EPC6901
Product Type	LSZH Fiber Optic Tight Buffer Compound
Material Route	Thermoplastic LSZH / HFFR
Primary Application	Optical fiber tight buffer layer
Related Application	Tight-buffered communication / optical cable constructions
Key Properties	Excellent insulation • Low water absorption • Flame retardancy • Self-extinguishing • Stable extrusion
Processing	Conventional thermoplastic extrusion; no irradiation
Halogen / Oxygen Index	0 ppm typical halogen content / 34% oxygen index

Product Overview

EPC6901 is an LSZH Fiber Optic Tight Buffer Compound developed for the tight buffer layer of optical fiber and selected communication-cable constructions. The material combines excellent electrical insulation, low water absorption, flame retardancy and self-extinguishing behavior with stable thermoplastic extrusion.

As an LSZH Fiber Optic Tight Buffer Compound, EPC6901 is intended for customers who need a low-smoke zero-halogen thermoplastic buffer material around optical fiber. Its low water absorption and insulation performance make it especially relevant where the buffer layer must protect the fiber while maintaining reliable processing.

Key Features

Optical Fiber Tight Buffer Application
Excellent Electrical Insulation
Low Water Absorption
Low Smoke Zero Halogen / HFFR
Flame Retardant & Self-Extinguishing
Good Thermoplastic Extrusion Processability
0 ppm Typical Halogen Content

Technical Data Sheet

Test Item	EPC6901
Density, g/cm³	1.46
Melt Index, g/10min	7.5
Tensile Strength, MPa	13.2
Elongation at Break, %	230
Aging Test, °C×h	110×168
Tensile Strength after Aging, MPa	14.7
Elongation after Aging, %	219
Oxygen Index, %	34
Smoke Density - Flaming	54
Smoke Density - Nonflaming	201
Toxicity Index	1
Hardness, Shore A	96
High Temperature Pressure Test, °C×h	90×4
Thermal Deformation, %	28
Low Temperature Impact @ -25°C	Pass
Thermal Shock @ 150°C	Pass
Halogen Content, PPM	0
pH (min)	6.2
Conductivity (max), μS/mm	0.8
Volume Resistivity, Ω·m	3×10¹²
Gasoline Immersion, 23°C×20h, Diameter Change, %	11
Diesel Oil Immersion, 23°C×20h, Diameter Change, %	12
Engine Oil Immersion, 50°C×20h, Diameter Change, %	11
Power Steering Fluid, 50°C×20h, Diameter Change, %	25
Transmission Oil, 50°C×20h, Diameter Change, %	21
Battery Acid Resistance, 90°C×48h	Pass

Recommended Extrusion Process Temperature

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

EPC6901 can be processed on conventional PVC/PE extrusion equipment for optical-fiber tight-buffer and communication-cable production.

Keep the 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.

For fine optical-fiber structures, buffer thickness, line speed and surface quality should be optimized on the customer's actual extrusion line.

How to Evaluate EPC6901 for Optical Fiber Tight Buffering

Selection Point	EPC6901 Positioning
Cable Layer	Tight buffer / protective buffer layer around optical fiber
Material Route	Thermoplastic LSZH / HFFR
Electrical Priority	Excellent insulation; volume resistivity 3 × 10¹² Ω·m
Moisture Priority	Low water absorption positioning
Mechanical Profile	13.2 MPa tensile strength / 230% elongation
Fire-Safety Profile	34% oxygen index / 0 ppm typical halogen content
Low Temperature	-25°C impact: Pass
Processing	Thermoplastic extrusion; no irradiation
Trial Validation	Confirm fiber structure, buffer thickness, strip behavior and finished-cable requirements

OEM & Customization

Customized Formulations
OEM Manufacturing
Color Matching
Technical Support
Small Batch
Fast Sampling
Free Samples

FAQ

1. What is EPC6901?

EPC6901 is an LSZH Fiber Optic Tight Buffer Compound for optical-fiber tight buffer layers and related communication-cable constructions.

2. What is a tight buffer compound?

It is a thermoplastic material extruded directly around optical fiber to form a protective buffer layer.

3. What applications is EPC6901 intended for?

It is mainly intended for tight-buffered optical fiber and communication / optical cable constructions requiring LSZH / HFFR material.

4. Why is low water absorption important?

Low water absorption supports stable insulation performance and helps reduce moisture-related effects in the buffer layer.

5. What are the key electrical properties?

The supplied technical data lists a volume resistivity of 3 × 10¹² Ω·m.

6. What is the typical oxygen index?

The supplied technical data lists a typical oxygen index of 34%.

7. Does EPC6901 require irradiation?

No. EPC6901 is a thermoplastic extrusion grade.

8. What extrusion temperature is recommended?

The reference profile runs from 100°C at Zone 1 to 165°C at the mould, with melt temperature controlled below 165°C and not exceeding 175°C.

9. Can customized colors be supplied?

Yes. Color matching and compatible masterbatch solutions can be discussed according to the optical-fiber and cable construction.

10. Can samples be provided?

Yes. Sample trials are recommended on the customer's actual fiber structure and extrusion line before final qualification.

Free Sample & Technical Support

For faster evaluation, please provide the optical-fiber type, buffer diameter, target buffer thickness, strip requirements, operating temperature, flame / LSZH requirements, extrusion equipment, color and estimated volume.

Samples, color matching and processing guidance can be discussed for qualified tight-buffer and communication-cable development projects.

Hot Tags: lszh fiber optic tight buffer compound, China lszh fiber optic tight buffer compound manufacturers, suppliers, factory, CPR Eca LSZH Cable Jacket Compound, Crack Resistant Telecom Cable Compound, Dca Communication Cable Sheathing Material, Flame Retardant Fiber Optic Compound, Thermoplastic Low Dielectric Cable Material, Thermoplastic Tight Buffer Compound