Dow ENDURANCE™ DHDA-7708 BK Datasheet,LLDPE,The Dow Chemical Company-SHANGHAI SUSHENG

Dow ENDURANCE™ DHDA-7708 BK

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DOW ENDURANCE™ DHDA-7708 BK is a thermoplastic semiconductive compound specifically designed for jacketing over medium, high, and extra-high voltage power cables. It combines the excellent physical properties and low moisture vapor transmission normally associated with Dow insulating jacket materials with the conductivity of thermoplastic semiconductive insulation shielding compounds. In medium voltage cable applications, a semiconductive jacket provides cable endurance and prolongs cable life by reducing neutral-to-ground impulse voltage. The semiconductive jacket enables on-reel cable diagnostic analysis in high and extra-high voltage applications. Compared to conventional thermoplastic semiconductive materials, DOW ENDURANCE™ DHDA-7708 BK offers: Improved environmental stress-crack resistance Improved low-temperature properties Improved thermomechanical properties Reduced adhesion to strippable insulation shields Improved cut-through and abrasion resistance Reduced moisture vapor transmission Details are shown in Figures 1 to 4 Specifications Cables jacketed with DOW ENDURANCE™ DHDA-7708 BK, prepared using sound commercial fabrication practice, would be expected to meet the following specifications: AEIC: CS8, CS9 ICEA: S-94-649 Type 1, S-108-720 Type 1 IEC: 60502, 60840, 62067

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DOW ENDURANCE™ DHDA-7708 BK is a thermoplastic semiconductive compound specifically designed for jacketing over medium, high, and extra-high voltage power cables. It combines the excellent physical properties and low moisture vapor transmission normally associated with Dow insulating jacket materials with the conductivity of thermoplastic semiconductive insulation shielding compounds. In medium voltage cable applications, a semiconductive jacket provides cable endurance and prolongs cable life by reducing neutral-to-ground impulse voltage. The semiconductive jacket enables on-reel cable diagnostic analysis in high and extra-high voltage applications.

Compared to conventional thermoplastic semiconductive materials, DOW ENDURANCE™ DHDA-7708 BK offers:

Improved environmental stress-crack resistance

Improved low-temperature properties

Improved thermomechanical properties

Reduced adhesion to strippable insulation shields

Improved cut-through and abrasion resistance

Reduced moisture vapor transmission

Details are shown in Figures 1 to 4

Specifications
Cables jacketed with DOW ENDURANCE™ DHDA-7708 BK, prepared using sound commercial fabrication practice, would be expected to meet the following specifications:

AEIC: CS8, CS9

ICEA: S-94-649 Type 1, S-108-720 Type 1

IEC: 60502, 60840, 62067

General Information
Uses	Semiconductive Jacketing Semiconductive Shield Underground cable Cable sheath Wire and cable applications
Agency Ratings	AEIC CS8 AEIC CS9 ICEA S-108-720 Type 1 ICEA S-94-649 Type 1 IEC 60502 IEC 60840 IEC 62067
Forms	Particle

Physical	Nominal Value	Unit	Test Method
Density	0.980	g/cm³	ASTM D1505
Environmental Stress-Cracking Resistance (10% Igepal, F0)	> 500	hr	ASTM D1693

Hardness	Nominal Value	Unit	Test Method
Durometer Hardness (Shore D)	55		ASTM D2240

Mechanical	Nominal Value	Unit	Test Method
Tensile Modulus - Secant	345	MPa	ASTM D638
Tensile Strength	11.7	MPa	ASTM D638
Tensile Elongation (Break)	450	%	ASTM D638

Films	Nominal Value	Unit	Test Method
Water Vapor Transmission Rate (38°C, 90% RH)	1.5	g/m²/24 hr	ASTM F1249

Aging	Nominal Value	Unit	Test Method
Tensile strength retention- 1 week (100°C)	75	%	ASTM D638
Elongation retention rate- 1 week (100°C)	75	%	ASTM D638

Thermal	Nominal Value	Unit	Test Method
Heat Distortion (ICEA) ¹(90°C)	1.0	%	ASTM D2632
Brittleness Temperature			ASTM D746
-- ²	-70.0	°C	ASTM D746
-- ³	-50.0	°C	ASTM D746

Electrical	Nominal Value	Unit	Test Method
Volume Resistivity			ASTM D991
23°C	25	ohms·cm	ASTM D991
90°C	50	ohms·cm	ASTM D991

Additional Information
Nominal property values above represent tests on molded, stress-relieved slabs. Cure times were 15 minutes at 175°C.

Figure 4: Cut-Through Resistance

Extrusion	Nominal Value	Unit
Drying Temperature	68.0 - 80.0	°C
Drying Time	2.0 - 4.0	hr
Melt Temperature	218 - 246	°C

Extrusion instructions
For optimum extrusion results with DOW ENDURANCE™ DHDA-7708 BK, use melt extrusion temperatures in the 425 to 475°F (218 to 246°C) range. Optimum radial resistivity results have been obtained by maximizing the air gap (distance from extrusion die to cooling water). Specific processing conditions can be determined only by trial on individual equipment. Pre-extrusion dehumidified hopper drying for 2 to 4 hours in the range of 155 to 175°F (68 to 80°C) to remove moisture is recommended.

Extrusion instructions

For optimum extrusion results with DOW ENDURANCE™ DHDA-7708 BK, use melt extrusion temperatures in the 425 to 475°F (218 to 246°C) range. Optimum radial resistivity results have been obtained by maximizing the air gap (distance from extrusion die to cooling water). Specific processing conditions can be determined only by trial on individual equipment. Pre-extrusion dehumidified hopper drying for 2 to 4 hours in the range of 155 to 175°F (68 to 80°C) to remove moisture is recommended.

Note Message
1 .	plaque
2 .	F50
3 .	Notched

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Resin Grade

Manufacturer

Category:	LLDPE , Semiconductive Linear Low Density Polyethylene Compound for Cable Jacketing
Manufacturer:	The Dow Chemical Company
Trademark:	Dow ENDURANCE™
Fillers:	-
Ports:	Qinzhou, Shekou, Shanghai, Ningbo
Delivery Terms	FOB, CIF, DAP, DAT, DDP
PDF:	bgYsvq_Dow-ENDURANCE-DHDA-7708-BK.pdf
PRICE:	Order Products email sales@su-jiao.com