LE4253DC北欧化工交联聚乙烯绝缘直流料

29.08.2011 Ed.2

Polyethylene

LE4253DC

Crosslinkable Insulation Compound

www.borealisgroup.com

Description

LE4253DC is a crosslinkable natural polyethylene compound, specially designed for insulation applications.

Applications

LE4253DC is intended for insulation of solid dielectric HVDC cables.

Special features

LE4253DC is a ready-to-use natural compound. The cleanliness property and excellent distribution of additives in LE4253DC would result in superclean insulation. It is developed for easy extrusion and low space charge accumulation when used in combination with Supersmooth LE0550DC as insulation and conductor screen.

Physical Properties

Property Typical Value Test Method

Data should not be used for specification work

Density (Base Resin) 922 kg/m3

ISO 1872-2/ISO 1183 Bulk density

500 - 600 kg/m3

Melt Flow Rate (190 °C/2,16 kg)

2 g/10min ISO 113

3 Tensile Strain at Break (250 mm/min) 1

> 450 % ISO 527 Tensile Strength (250 mm/min) 1

> 17 MPa ISO 527

Retention of Tensile Properties After Ageing (500 h, 135

°C) 1

< 20 % IEC 60811-1-2 Elongation under load < 175 % IEC 60811-2-1 Hot Set Test (200 °C, 0,20 MPa) Permanent deformation < 15 % Göttfert Elastograph < 0,65 Nm Methanol Wash 1.000 ppm

Moisture

200 ppm

Karl Fischer-titration

1

Measured on crosslinked specimens

Electrical Properties

Property Typical Value Test Method

Data should not be used for specification work

Dielectric constant (50 Hz)

< 2,3

IEC 60250 DC Volume Resistivity > 10 POhm.cm IEC 60093 Dielectric Strength (50 Hz) > 22 kV/mm IEC 60243 Dissipation Factor (50 Hz)

< 0,0005

IEC 60250

Polyethylene

LE4253DC

www.borealisgroup.com

Processing Techniques

To produce a good and reliable cable, it is essential to ensure careful and very clean handling of the insulation material. Hence all material handling should preferably be conducted in closed systems and in clean room

conditions. Practical advice is given in a separate brochure. Please contact your Borealis representative for more details.

Extrusion

Melt temperature

130 - 140 °C

Packaging

Package: Bulk

Octabins Smallbins

Storage

LE4253DC has a shelf life of 12 months from production date if stored in unopened original packages, under dry and clean conditions at temperatures between 15 - 25 °C. The material could be stored (originally closed and in dry environment) at an ambient temperature up to 40°C for a certain period of time (6 months) without negative

influence on the material quality. Before use, material shall be conditioned indoors (production room) at the ambient temperature.

More information on storage is found in our "Safety data sheet" / "Product safety information sheet" for this product.

Safety

The product is not classified as dangerous and is intended for industrial use only. Check and follow local codes and regulations!

Please see our "Safety data sheet" / "Product safety information sheet" for details on various aspects of safety of the product. For more information, contact your Borealis representative.

Polyethylene

LE4253DC

www.borealisgroup.com

Disclaimer

The product(s) mentioned herein are not intended to be used for medical, pharmaceutical or healthcare applications and we do not support their use for such applications.

To the best of our knowledge, the information contained herein is accurate and reliable as of the date of publication, however we do not assume any liability whatsoever for the accuracy and completeness of such information.

Borealis makes no warranties which extend beyond the description contained herein. Nothing herein shall constitute any warranty of merchantability or fitness for a particular purpose.

It is the customer's responsibility to inspect and test our products in order to satisfy itself as to the suitability of the products for the customer's particular purpose. The customer is responsible for the appropriate, safe and legal use, processing and handling of our products.

No liability can be accepted in respect of the use of Borealis' products in conjunction with other materials. The information contained herein relates exclusively to our products when not used in conjunction with any third party materials.