Good Electrical Performance Low Smoke Density Htv Ceramic Solid Silicone Rubber for Ceramic Wires and Cables

Product Description

Ceramic refractory flame retardant silicone rubber

Product description

Ceramic refractory silicone rubber is a new type of composite material that can be vitrified at high temperature.It is quickly burned into a hard and complete shell at 500-1000 ºC to ensure that wires and cables are not damaged in case of fire and play a solid role in smooth power and communication.

The protective effect of Ceramic refractory resistant silicone rubber can replace mica tape as the fire-resistant layer of cables. In particular, It can be used not only as a refractory layer, but also as an insulating layer in medium and low voltage fireproof wires and cables.

 

Main features

1. Self supporting ceramic body formed in flame

When the rubber material containing inorganic filler is exposed to the flame, the rubber will degrade or burn, and the degradation or combustion products will be left. These residues are usually non condensing or non self-supporting, or even broken into particles or powders because this has no fire protection effect. When the ceramic rubber with special design formula is exposed to the flame,(depending on the rubber variety and formula, the Vitrification occurs in the range of 500 ~ 800 ºC or above), and sintered into porous self-supporting ceramic body, which can be maintained within a certain time (0.5 ~ 2H).Maintaining the integrity of the structure can give full play to the effect of "passive fire prevention" and win valuable time for fire safety.

2. It has excellent strength and good thermal shock resistance

The vitrified sintered body is relatively hard, with ceramic sound when knocking, and has certain flexural strength and dielectric strength. The flexural Strength of ceramic silicone rubber is much higher than that of general silicone rubber, and it increases obviously with the increase of temperature. Spray water into the high-temperature ablated specimen in the simulated fire fighting process, the sintered ceramic silicone rubber does not crack, showing good thermal shock resistance.

3. Halogen free, low smoke, low toxicity, self extinguishing, environmental protection

Ceramic silicone rubber can achieve flame retardant and self extinguishing effect without adding halogen flame retardant. Flame retardant UL94V-0. After being burned for a few minutes, the smoke will be completely cut off. In the next sintering process, there will be no smoke. The combustion of ceramic silicone rubber produces carbon dioxide, water and silicon dioxide, which are non-toxic substances.

4. Good electrical performance

The electrical properties of the ceramic silicone rubber with optimized formula:the volume resistivity before sintering is not less than 10¹⁵ Ω• cm, and with the increase of sintering temperature,the volume resistivity decreases. After burning at 1000 ºC for 30min, the volume resistivity decreases to 10⁷ Ω• cm.

5. Easy to process

The production equipment of ceramic silicone rubber compound is the same as that of general silicone rubber. The compound has good extrusion performance and molding performance. The silicone rubber wire and cable equipment can be directly used to extrude and vulcanize into wires and cables without adding equipment. The production process of fire-resistant cable is simplified and the cost is reduced.

 

Application

Ceramic wires & cables

Ceramic miscellaneous parts

 

Packing and Storage

Packing:20KG carton.

Storage:When the product is stored unopened at room temperature, the shelf life of the product is 1 year from the date of production,It is recommended to use it within 3 months. If it exceeds 3 months, the mixing time of the product need to be extended.

*Please wear protective glasses and gloves when operating this product.

*Store in a dry and cool place, avoid direct sunlight.

*Keep out of the reach of children.

 

Storage beyond shelf life does not necessarily mean that the product is no longer usable. In this case however, the properties required for the intended use must be checked for quality assurance reasons.

 

Technical data

 

Technical properties	Standard	IOTA HTV 8173	IOTA HTV 8873
Appearance		Gray-white	Gray-white
Density(g/cm^3)	GB/T 531.1-2008	1.44	1.44
hardness(Shore A)	GB/T 531.1-2008	70	70
Tensile strength (MPa) ≥	GB/T 528-2009	6	7
Elongation at break (%) ≥	GB/T 528-2009	200	240
Tear strength (KN/m) ≥	GB/T 529-2008	15	22
Volume resistivity (Ω.cm)	GB/T 1692-2008	1x10^14	1x10^15
Dielectric strength(KV/mm)	GB/T 1695-2005	20	22
Dielectric constant	IEC 60250	3.3	3.3
Tracking resistance	IEC 60587	1A3.5	1A3.5
Oxygen Index	GB/T 10707-2008	25	27
Smoke toxicity	GB/T 20285	ZA1	ZA1

1.Curing condition:1.0% peroxide [2.5 Bis(t-butylperoxy)-2.5 dimethylhexane, 50 %] to cure under pressure at 175 ºC for 5 minutes, and then making a 2mm thick test piece for testing.

2.if it is drying tunnel curing, it is recommended to add the Bis (2, 4-Dichloro Benzoy) peroxide vulcanizing agent. The dosage: 1% of the rubber weight.

3.The data will vary with different vulcanizing agents and different production conditions.

4.The technical date sheet above are for reference only.
 

Q1: What is Solid Silicone Rubber?
A1: Solid Silicone Rubber, often called High-Temperature Vulcanizing (HTV) rubber, is a high-viscosity material supplied as a gum or solid base. It requires heat and pressure to cure into its final elastic form.

Q2: How is it processed differently from Liquid Silicone Rubber (LSR)?
A2: Unlike liquid LSR, solid silicone is typically processed using compression molding, transfer molding, or extrusion. It requires a multi-step process of mixing, shaping, and then curing under heat.

Q3: What are its most common applications?
A3: It's widely used for manufacturing gaskets, seals, oven mitts, keyboard pads, insulating sleeves, and various extruded profiles for automotive and industrial applications.

Q4: What are the main advantages of Solid Silicone Rubber?
A4: It offers excellent heat resistance, good physical properties like tear strength, and electrical insulation. It is often chosen for creating custom-shaped parts and durable, thick-walled products.