thermoplastic compounds

Product Description

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Model: SHD01-J-01

Thermoplastic granules not only has excellent low-smoke halogen-free flame retardant performance, but also has excellent extrusion processing performance. It can be extruded on an ordinary PVC extruder. As long as the cooling device is normal, the extrusion processing speed can be accelerated. And its high hardness can avoid surface wear caused by drag, friction, etc.during the laying process, which affects the quality of products, especially BV lines for construction.To save your time, contact us for specific items & details you may interest.

 

Based on polyolefin, containing special halogen-free flame retardant and smoke suppressant, it is processed by precise mixing with special formula. Its flame retardant system has excellent flame retardant, wire can pass a single vertical combustion test . When burning, no halogen acid gas is released, the amount of toxic and corrosive gas is very small, and the smoke concentration is very low. Moreover, its hardness is relatively high, which is suitable for BV wire for construction.

At SUNUA, we prioritize providing customers with reliable cable compounds at competitive prices. Our range includes flame retardant polyethylene and LSOH LSZH compound, among others.

 

1. Standard:

GB/T-

 

2. LSZH Cable Jacket Features and uses

This product is suitable for occasions with high flame retardant requirements and low secondary hazards, such as: subways, ships, high-rise building program-controlled switch rooms, computer rooms and various crowded public places. It is suitable for the insulation layer of low-smoke halogen-free flame-retardant cables with a core working temperature of 90 °C.

 

3. Extrusion process

It can be extruded by L/D18-25 extruder. When the screw compression ratio is low, the output volume is large. Each zone of the extruder must have a cooling control system, and the melt temperature should not exceed 170 °C. Since the difference between the actual temperature of the melt and the indicated value of the temperature control table varies with the type of extruder, each user should select a suitable temperature according to the specific conditions of the extruder used.

The following temperatures can be used as a reference for commissioning:

barrel position zone 1 zone 2 zone 3 zone 4 nose and mode Temperature(&#;) 125±5 135±5 145±5 155±5 160±5

The machine head can be without a filter screen, or a filter screen below 60 mesh can be used; the mold can be squeezed or squeezed. It can be matched with special color masterbatch, the dosage is about 1-2%, generally does not affect the material properties

Note: If the aluminum-plastic composite inner bag&#;damp proof fails, it should be dried before use. The drying temperature should be 65&#; and the drying time should be at least 2 hours. It is better for hot material to enter and leave the extruder.

With competitive price and timely delivery, SUNUA sincerely hope to be your supplier and partner.

 

4. Packaging, transportation and storage

Packing: N.W: 25kg/kg bags with inner bag of aluminum-plastic composite vacuum moisture-proof bag and outer packing being made of kraft paper composite bag or woven bag.It should not be exposed to the sun and rain during transport. It should be stored in a clean, cool, dry and ventilated warehouse. It should be handled with care.

 

5. Shelf life :

6 months

 

6. Physical and mechanical properties

Project name Units SHD01-J-01 Normal value Typical Value Density g/cm³ &#;&#; 1.45 Hardness (Shore D, 15/1S)   &#;&#; 55 Tensile strength MPa &#;10.0 12.5 Elongation at break % &#;160 205 Heat aging in air oven (100&#;×168h)       Aging Tensile Strength MPa &#;10.0 11 Rate of change in tensile strength % Max ±30 +16 Elongation at break after aging % &#;120 170 Change rate of elongation at break % Max ±30 -15 Environmental stress cracking resistance h &#;96 pass Heat stress cracking h &#;96 pass Low temperature impact embrittlement temperature &#; -25 Pass (-45) Volume resistivity at 20&#; Ω.m &#;1.0× 5.1× Dielectric Strength MV/m &#;20 28 Oxygen Index   &#;28 35.6 Smoke density ( flaming)   &#;100 54 Smoke density(no flaming)   &#;350 310 Halogen acid gas release amount mg/g &#;5 0 PH value   &#;4.3 6.3 Conductivity µS/mm &#;10 0.5 Toxicity index   &#;5 0.4

Thermal Stability Test Apparatus, as per IEC:-405.

Model No.: D

 

Thermal stability tests (essai de stabilité thermique, essai de stabilité thermique, prova di stabilità termica) are conducted on PVC, EVA etc. based materials to obtain the behavior of thermal degradation at high temperatures.

During extrusion process many times the changeover takes longer than expected and the previous batch of raw material stays in the screw getting heated by the hot heaters up to a mx temp of 170 deg cel sometimes. As a result of this, cable manufacturers find burnt particles or fish eyes, or contamination on insulation/jacket after the extrusion of cable. This is actually caused by the quick degradation of the compound that was left in side the extrusion screw.

At elevated temperatures, such as those that would be experienced in an indirect fire scenario, the process of degradation Material containing HCL, give off hydrochloric acid (HCl), that consequently accelerates the degradation process. The thermal stability test determines how stable these plastic materials are.

Tests are conducted not before 16 hours after the extrusion of the insulating or sheathing compounds. Thermal stability tests are conducted in accordance with the international standard IEC -1-2 now covered by IEC -405. Test methodology requires glass test tubes 110 mm long, with an outer diameter of roughly 5 mm and an inner diameter of (4,0 ± 0,5) mm, universal indicating paper (pH range of 1 to 10), and a thermostatically controlled heating apparatus for the temperature per the quality of the cable type being tested. The temperature is controlled by heating a solid aluminum block with a digital temperature controller to take care of constant uniform heat throughout the testing. Three samples, of 50 ± 5 mg, are be taken from the jacket or the insulation or directly from the compound granules be tested. Each sample consists of two or three small strips of between 20-30mm. These samples are placed into a glass tube together with a strip of dry universal indicating paper measuring about 15mm long by 3mm wide. The pH paper must protrude out of the highest of the tube by about 5mm. The test samples then placed within the thermal heating equipment (already at the required temperature) and heated for the desired time. Thermal stability testing measures either the time it takes for the universal indicating paper to vary color from a pH value of 5pH to a price between 2- 3pH, or for a specified duration without pH color change, whichever is soonest. the color change point is taken into account to possess been reached when the red coloring of the universal indicating paper characteristic of a 3pH value has just appear. Towards the top of the expected test time, the pH paper is replaced every 5 min to 10 min so the instant of change is best visible. For a cable to fulfill the wants of Thermal Stability Testing, the typical value of the three samples shall not be less than the worth laid out in the quality for that sort of cable.

 

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