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Novel flame resistant cable

A fire-resistant cable, a new type of technology, applied in the direction of insulated cables, cables, circuits, etc., can solve the problems of insufficient adhesion between conductors and mica tapes, low fire resistance, shortened service life, etc., so as to avoid insufficient tape tension and enhance adhesion. , easy to produce effects

Inactive Publication Date: 2009-06-03
BAOSHENG SCI & TECH INNOVATION
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are certain deficiencies in the existing fire-resistant cables, which are mainly manifested in: 1. The longitudinal tension control of the mica tape should be uniform. Due to the insufficient tension, the adhesion between the conductor and the mica tape is insufficient, and the conductor will appear after the insulation layer extrusion process. 2. If the tension of the mica tape is too tight, the mica tape will break. Even if it does not break, the mica tape will crack after a long period of use, resulting in low fire resistance and shortened service life.

Method used

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Embodiment Construction

[0011] The inorganic insulating powder layer 2 is adhered on the mica-bearing side of the mica tape with a silicone adhesive, and the weight per square meter of the inorganic insulating powder layer is 0.1-0.5 g. The material of the inorganic insulating powder layer is silicon or aluminum oxide or calcium carbonate or aluminum hydroxide or glass or magnesium hydroxide, which can be any one of them, or a mixture of two or more of them, the particle size of the material The diameter is 1 nm to 100 nm. The substrate surface of the mica tape 3 is also bonded with inorganic insulating powder 4, and the mica tape is wrapped vertically on the conductor 1, and the side of the mica with the mica and inorganic insulating powder layers is inwardly in contact with the conductor 1, and the mica tape is covered with glass Extrude the insulating layer 5, the outer sheath after the ribbon is tied tightly.

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Abstract

The invention relates to a novel flame resistant cable, and belongs to the technical field of cables. The novel flame resistant cable comprises a conductor and a mica tape longitudinally wrapped on the conductor, an insulating layer extruded and wrapped and an outer sheath. The novel flame resistant cable is characterized in that a glass tape for tightening the mica tape is arranged on the mica tape; an inorganic insulating powder layer is arranged between the conductor and the mica tape; and the insulating layer is extruded and wrapped on the mica tape tightened. The invention has the advantages of scientific and reasonable structure, simpleness and compactness, easy production and manufacture and improved product quality, fire resistance rating, service performance and service life. The adhesion force between the conductor and the mica tape is improved under the condition that the tensile force of a covering machine is not increased, therefore, the phenomenon that the end surface of the cable is exposed from the conductor is avoided. Inorganic insulating powder is attached to the mica tape by an organic silicon biding agent and filled in the dish of the mica tape, so that the contact area between the conductor and the mica tape is enlarged and the adhesion force is enhanced. The inorganic insulating powder is also attached to the backing material surface of the mica tape; the insulating layer is extruded and wrapped after the glass tape is tightened on the mica tape, so that the contact area between of the mica tape and the insulating layer is enlarged.

Description

technical field [0001] The invention relates to a cable structure and a manufacturing method of the cable, belonging to the technical field of cables. Background technique [0002] At present, the design structure of fire-resistant cables is generally composed of conductor outer longitudinal mica tape, extruded insulation layer and outer sheath, etc. The outer conductor is longitudinally wrapped with mica tape and then extruded insulation layer. The base surface of the mica tape is extruded with an insulating layer. There are certain deficiencies in the existing fire-resistant cables, which are mainly manifested in: 1. The longitudinal tension control of the mica tape should be uniform. Due to the insufficient tension, the adhesion between the conductor and the mica tape is insufficient, and the conductor will appear after the insulation layer extrusion process. 2. If the longitudinal tension of the mica tape is too tight, the mica tape will break. Even if it does not break...

Claims

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Application Information

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IPC IPC(8): H01B7/295
Inventor 房权生庞玉春冯志骏李明徐云海王晓琦
Owner BAOSHENG SCI & TECH INNOVATION
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