Semi-horniness flame-proof PVC sheath material for high-voltage cable

Abstract

The present invention discloses one kind of semi-hard flame retarding PVC material for sheath of high voltage cable. The semi-hard flame retarding PVC material consists of PVC resin 100 weight portions, plasticizer 35-39 weight portions, low temperature shock impact modifier 5-7 weight portions, stabilizer 5-7 weight portions, flame retardant 6-9 weight portions, filler 20-25 weight portions, and lubricating assistant 0.5-1 weight portion. The semi-hard flame retarding PVC material is used in making sheath of high voltage cable and is superior to common PVC sheath material.

Description

technical field [0001] The invention relates to a semi-rigid flame-retardant PVC sheath material for high-voltage cables. Background technique [0002] The outer sheath material of 110KV and above high-voltage cables can choose PVC material or PE material, because the conductor withstands ultra-high voltage, from many perspectives such as safety, the high-voltage cable standard puts forward higher requirements for the outer sheath material of the cable. Some special requirements such as insulation resistance. [0003] At present, most of the outer sheath materials of 110KV and above high-voltage cables are selected from plastics with stable performance and excellent extrusion processing performance. Considering possible scratches during construction, it is possible to choose PE materials with higher hardness. Ensure that the outer sheath of the cable is intact; considering the flame retardant performance required by the cable, choosing PVC materials with excellent flame ret...

AI Technical Summary

Problems solved by technology

[0010] The test performance of the PVC cable sheath material produced by this formula fully meets the requirements for the sheath layer material in the high-voltage cable standard, but the hardness of the material is only about Shore 45D, and the hardness of ordinary MDPE materials is about Shore 60D From the numerical point of view, there is a big difference. The actual hand feeling is also that the PVC sheath material is relatively soft, while the MDPE sheath material is relatively stiff, so the ordinary PVC sheath material has poor resistance to external scratches. For high-voltage cables The protective effect of the cable is limited, and it is prone to damage during the construction process, and once the damage occurs, the damaged part needs to be manually repaired at each place, which increases the work intensity of the workers during the cable laying process; and for the part laid on the bracket For high-voltage cables, the outer sheath that is too soft will not be able to resist the shear stress of the bracket after a long period of use, resulting in damage to the outer sheath. Considering various factors, ordinary PVC materials are used to produce high-voltage cable sheaths The defect is more obvious

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