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High Voltage, Ultra-High Pressure Heating Cable Compound

HZJ-90 90℃ PVC Flame Retardant Soft Sheath Plastic

HZJ-90 90℃ PVC Flame Retardant Soft Sheath Plastic has flame retardant properties and can maintain stability in high temperature environments. It is often used as a sheath for electrical equipment such as cables and wires, and can effectively prevent the occurrence and spread of fire. It has pressure resistance, acid and alkali resistance, and corrosion resistance. 90℃ PVC flame retardant soft protective layer plastic also has high strength and durability, and can withstand the impact and extrusion of various external forces.

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HZJ-90 90℃ PVC Flame Retardant Soft Sheath Plastic
  • HZJ-90 90℃ PVC Flame Retardant Soft Sheath Plastic
  • HZJ-90 90℃ PVC Flame Retardant Soft Sheath Plastic
  • HZJ-90 90℃ PVC Flame Retardant Soft Sheath Plastic
  • HZJ-90 90℃ PVC Flame Retardant Soft Sheath Plastic
  • HZJ-90 90℃ PVC Flame Retardant Soft Sheath Plastic
  • HZJ-90 90℃ PVC Flame Retardant Soft Sheath Plastic
  • HZJ-90 90℃ PVC Flame Retardant Soft Sheath Plastic
  • HZJ-90 90℃ PVC Flame Retardant Soft Sheath Plastic
  • HZJ-90 90℃ PVC Flame Retardant Soft Sheath Plastic
  • HZJ-90 90℃ PVC Flame Retardant Soft Sheath Plastic
  • HZJ-90 90℃ PVC Flame Retardant Soft Sheath Plastic
  • HZJ-90 90℃ PVC Flame Retardant Soft Sheath Plastic
Sheath Compound Series
HZJ-90 90°C PVC Flame Retardant Soft Sheath Compound
Medium/Low Voltage Cable Sheathing · VW-1 Rated · 90°C Continuous
90°C
Temperature Rating
Product Overview
HZJ-90 is a flame retardant polyvinyl chloride (PVC) compound formulated for soft sheath applications in medium and low voltage cables. This compound incorporates a halogenated flame retardant system that meets VW-1 vertical flame test requirements while maintaining flexibility for cable installation and routing. Designed for continuous operation at 90°C, the formulation provides consistent extrusion characteristics and surface finish quality. The material maintains mechanical properties after thermal aging and demonstrates oil resistance suitable for industrial environments where hydrocarbon exposure may occur. HZJ-90 is available in standard black and custom colors for cable identification.
Core Advantages
  • VW-1 flame rating per UL 1581 with afterflame duration ≤15 seconds and no cotton ignition.
  • Maintains Shore A hardness 76-80 across extrusion temperature range 160-190°C.
  • Thermal stability under load: retains ≥80% tensile strength after 168 hours at 120°C air oven aging.
  • Oil resistance: passes IRM 902 oil immersion (7 days / 90°C, tensile strength retention ≥70%).
  • Softness profile suitable for extrusion around heating elements without stress cracking.
  • Compatible with standard PVC extrusion equipment at line speeds up to 120 m/min.
Product Characteristics
Base PolymerPolyvinyl Chloride (PVC) with flame retardant additives
Temperature Rating90°C continuous, 105°C emergency (300h max)
Flame PerformanceVW-1 (UL 1581), FT1, IEC 60332-1-2
Shore Hardness (A)78 ± 3
Tensile Strength≥12.5 MPa (original), ≥10.0 MPa after 168h/120°C aging
Elongation at Break≥250% (original), ≥200% after aging
Specific Gravity1.40 ± 0.03 g/cm³
Oxygen Index≥28%
Oil Resistance (IRM 902)7 days / 90°C, tensile retention ≥70%, elongation retention ≥65%
Cold Bend TestPass at -15°C, no cracking
Application Scenarios
Sheathing layer for medium and low voltage heating cables in floor warming systems
Outer jacket for oil-resistant flexible cords used in machine tools and workshops
Cable protection in environments with occasional grease and mineral oil exposure
Replacement for standard PVC compounds requiring enhanced flame retardancy and oil resistance
Processing Guidelines
DryingNot required for as-supplied material (moisture ≤0.15%)
Extrusion Temperatures150°C (feed) to 175-185°C (die)
Screw DesignGeneral purpose PVC screw, L/D 20:1 to 25:1, compression 2.5:1 to 3.0:1
Line SpeedUp to 120 m/min depending on cable construction
StorageStore in original sealed bags below 40°C; shelf life 12 months
Frequently Asked Questions
What is the difference between HZJ-90 and standard PVC sheath compounds? ▸
HZJ-90 incorporates a specialized flame retardant system that achieves VW-1 rating while maintaining softness (78A hardness). Standard PVC sheath compounds typically have either lower flame performance or higher hardness. HZJ-90 also offers improved oil resistance compared to general purpose PVC, with tensile retention ≥70% after IRM 902 immersion.
Can HZJ-90 be used for direct burial cables? ▸
HZJ-90 is not designed for continuous water immersion or direct earth contact. For buried applications, an additional water-blocking layer is required. The compound does not contain water-treeing inhibitors and should not be used in underground installations without proper cable construction design.
What color options are available for HZJ-90? ▸
Standard supply is black. Custom colors including orange, red, blue, and gray are available with minimum order quantity. Color additions may affect flame retardant performance; validation testing is required for custom colors to maintain VW-1 rating.
What is the recommended screw design for extrusion? ▸
General purpose PVC screws with L/D ratio 20:1 to 25:1 and compression ratio 2.5:1 to 3.0:1 are suitable. Avoid using screws designed for polyolefins as they may not provide adequate mixing. Use moderate screw speeds to maintain melt temperature below 195°C.
How should processing equipment be cleaned after using HZJ-90? ▸
Purge with low density polyethylene (LDPE) or dedicated PVC purging compound at 170-180°C. Follow with standard cleaning procedures for screw pull and die disassembly when changing to non-PVC materials. For short color changes, use PVC purge compound formulated for quick color transition.
HZJ-90 extruded sheath sample
Material Note
HZJ-90 meets RoHS and REACH SVHC compliance requirements as of current revision. The compound does not contain lead, cadmium, mercury, or chromium VI. Technical data represents typical values and should be verified through sample testing under specific production conditions. For oil exposure applications with continuous immersion, contact technical service for additional validation.
Storage and Handling Notice
Store HZJ-90 in original sealed packaging in a cool, dry environment below 40°C (104°F). Avoid direct sunlight, ozone sources, and proximity to heating equipment. Once opened, reseal bags tightly and use within 4 weeks. Material exposed to moisture above 0.2% may cause surface imperfections during extrusion; predrying at 65-75°C for 2 hours is required in such cases. Keep away from open flames during processing as decomposition produces hydrogen chloride gas — ensure adequate ventilation.
Technical data represents typical values under standard test conditions. Product performance may vary with processing parameters and cable construction. Certification of finished cable assemblies requires testing of complete constructions. Contact technical service for sample evaluation and application support.

Flame retardant PVC sheath material for wire and cable is a granular material prepared by mixing, plasticizing and granulating with polyvinyl chloride resin as the base material and adding plasticizers, stabilizers, flame retardants and other additives.

Model, brand, name, implementation standard and use

Model

trademark

Maximum core operating temperature (°C)

name

Enforce the standard

use

ZH-70

7031

70

70°C PVC flame retardant soft layer plastic

GB/T8815-2008

Core working temperature 70°C flame retardant PVC wire and cable sheath plastic

ZHR-70

7032

70

70°C PVC flame retardant soft layer plastic

Core working temperature 70°C flame retardant PVC flexible wire and cable layer layer plastic

ZHJ -90

9031

90

90°C PVC flame retardant soft layer plastic

Core working temperature 90°C flame retardant PVC power cable sheath layer plastic

Note: The relative density index and color are determined by the supply and demand sides through negotiation

Mechanical, physical and electrical properties

Pilot project

unit

Standard value

7031

7032

9031

Tensile strength

≥MPa

15.0

12.5

16.0

Tensile strain at break

≥%

180

200

180

Impact embrittlement temperature

<°C

-25

-30

-20

Volume resistivity at 20°C

≥Ω.m

1.0 X108

1.0 X108

1.0 X109

Dielectric strength

≥MV/m

18

18

18

Thermal deformation

≤%

50

65

40

200°C thermal settling time

≥min

50

60

80

Oxygen index

%

26~36

26~32

26~36

Heat-aging properties

 

Thermal aging temperature

℃

100±2

100±2

100±2

Thermal aging time

h

168

168

240

Tensile strength after aging The maximum rate of change in tensile strength

≥MPa

15.0

12.5

16.0

≤%

±20

±20

±20

Tensile strain at break after aging The maximum rate of change of tensile strain at break

≤%

180

200

180

≤%

±20

±20

±20

Loss of quality

≤g/m²

23

25

15

 Processing technology

Processed by general extruder, L/D≥20, the recommended setting temperature of each extruder is as follows

Zone

District 1

2nd arrondissement

3rd arrondissement

4th arrondissement

5th arrondissement

Die head

Temperature °C

140

160

170

175

180

175

Marking, packaging, transportation and storage

Logo: The packaging bag should be marked with: the name of the manufacturer, product variety and model, batch number, color, manufacturing date, net weight, this standard number, and affix the color mark;

Packing: (25.0±0.2) kg bag, polyethylene film inner bag, woven bag or kraft paper composite bag outer packaging, or other packaging quality (weight) quantity negotiated by both supply and demand;

Transportation and storage: cable materials should not be exposed to the sun and rain during transportation, and should be stored in a clean, cool, dry and ventilated warehouse.

ABOUT US
30YEARS OF
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About Us

Coming From China, Marketing To The World.

Hangzhou Meilin New Material Technology Co., Ltd. was established in July 1994 (formerly known as Zhejiang Lin'an Hongyan Plastic Factory). The company has two factories located at 619 Linglongshan Road and 259 Xingyu Street, Lingqiu Street, Linglong Industrial Park, Lin'an District, Hangzhou City. The registered capital of the company is 75 million yuan, covering an area of over 18000 square meters and a building area of over 30000 square meters. Currently, modern industrial factories and 18 advanced automated production lines have been built. The new factory area will be produced in 2021, making it the cleanest and most beautiful professional cable material manufacturer in the entire region, agreement conditions.

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