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Low-smoke halogen-free and flame-retardant cable sheath material based on glass transition mechanism

A technology of vitrification and sheathing material, applied in cables, insulated cables, conductors and other directions, can solve the problems of loss of basic functions of wires and cables, unsustainable protection of wires and cables, violent combustion of wires and cables, etc. The effect of isolating flame retardant and improving flame retardant effect

Active Publication Date: 2014-01-01
SUZHOU CPLUS NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The low-smoke and halogen-free material using this type of flame retardant has the advantage of low-smoke and halogen-free after being made into flame-retardant wires and cables, but the flame-retardant effect is poor, mainly due to two disadvantages: one is that it cannot continuously protect wires and cables. If it cannot self-extinguish after dehydration, it will cause the wires and cables to continue to burn violently, causing the wires and cables to lose their basic functions; the second is dripping and delayed combustion. This type of flame retardant forms a loose structure after dehydration, and it is impossible to avoid dripping and delay spread of fire

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] The low-smoke halogen-free flame-retardant sheathing material of the present invention is composed of 38.5% resin, 57.5% inorganic flame retardant and 4% auxiliary agent. Among them, the base material is composed of 60% ethylene-vinyl acetate resin, 10% polyethylene elastomer, 15% polyethylene, and 15% polyethylene-based compatibilizer; the inorganic flame retardant is composed of 99.5% vitrified Composed of inorganic flame retardant and 0.5% titanate coupling agent; additives consist of 45% antioxidant, 15% anti-copper agent, 10% stearic acid and stearate, 20% silicone and 10% carbon black powder. This embodiment can reach a density of 1.45g / cm 3 , The tensile strength is 9.5Mpa, the elongation at break is 180%, the oxygen index is 29, and the smoke density is 69. When the extruded strip is burned vertically in this embodiment, there is obvious vitrified covering.

Embodiment 2

[0023] The low-smoke halogen-free flame-retardant sheathing material of the present invention consists of 40% resin, 56% inorganic flame retardant and 4% auxiliary agent. Among them, the base material is composed of 60% ethylene-vinyl acetate resin, 10% polyethylene elastomer, 15% polyethylene, and 15% polyethylene-based compatibilizer; the inorganic flame retardant is composed of 86% vitrified Inorganic flame retardant, 13.5% silicon dioxide and 0.5% titanate coupling agent; auxiliary agent consists of 40% antioxidant, 10% anti-copper agent, 10% stearic acid and stearic acid Salt, 10% silicone, 15% simethicone and 15% carbon black powder. This embodiment can reach a density of 1.42g / cm 3 , tensile strength 11.2Mpa, elongation at break 170%, oxygen index 31, smoke density 50. This example had a vitrified covering when the extruded strip burned vertically.

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Abstract

The invention relates to a low-smoke halogen-free and flame-retardant cable sheath material based on the glass transition mechanism, which is formed by physically and uniformly mixing PE-based (polyethylene-based) resin, an inorganic flame retardant and various auxiliary agents and adhering the mixture at high temperature; the inorganic flame retardant is formed by quickly glazing a glass forming agent, a fluxing agent and an opacifier at the temperature less than 900 DEG C; in a high-temperature process, a compact and firm coating is formed on the surface of a cable by the glass transition mechanism; on one hand, the coating is capable of realizing insulation and flame resistance and improving the flame-retardant effect better, and on the other hand, the compact and firm coating is capable of guaranteeing basic functions of the cable within a short time; and the compact and firm coating guarantees insulation of the cable or firmness of the sheath, incombustibility and inhibition of fire diffusion.

Description

Technical field [0001] The present invention involves wire and cable protective cover, and especially involves a low -smoke halogen -free flame -retardant cable protective kit. Background technique [0002] At present, the low -smoke -free flame -free flame retardant system of domestic cables is mainly concentrated in two directions: one is organic phosphorus nitrogen; the other is inorganic hydration.There are many types of organic phosphorus phosphorus nitrogen, and the main flame retardant mechanism is to use the coverage of its charcoal.The disadvantage is that the molecular weight is small, and it is easy to drip after the charcoal.The flame retardant of inorganic hydraulic objects mainly relies on inorganic aquarmers to lose water at high temperature and heat -absorbing flame retardant. Common flame retardants are aluminum hydroxide, magnesium hydroxide, and zinc borate.The low smoke -free material using this type of flame retardant has the advantage of low smoke and haloge...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/08C08K3/40H01B7/295
Inventor 林松权严永昌徐胜文黄一钊王登辉
Owner SUZHOU CPLUS NEW MATERIAL
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