Fire resistant insulation tape of cable
A technology of refractory insulation and refractory insulating layer, which is applied to insulators, insulated cables, insulated conductors, etc., can solve the problems of low adhesion between mica and adhesives, affecting the insulating performance of refractory performance, and still losing the function of refractory insulating layer, etc. Achieve the effect of being beneficial to cable manufacturing, good refractory layer integrity, and long refractory time
Inactive Publication Date: 2007-05-16
WUXI HUANCABLE
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Problems solved by technology
The disadvantages of this type of fire-resistant insulating tape are: 1. The cohesive force between mica and adhesive is low, and mica flakes are prone to occur, which affects the fire resistance and insulation performance at high temperature; The mica will warp, and will fall off after a little friction, which also affects the fire-resistant insulation performance, and the cable made of it has poor bending resistance and wear resistance (it will cause the mica sheet to fall off); 3. The glass fiber tape will melt at high temperatures such as 750-1000 °C Finally, due to the loss of support between mica sheets, it is difficult to maintain its integrity. Small external vibrations or wind blowing after a fire will cause the mica to fall off, resulting in the loss of the refractory insulating layer.
Method used
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Embodiment 1
[0015] Embodiment 1: Referring to Fig. 3, the fire-resistant insulating tape for cables of the present invention is composed of a thin glass cloth 1 with a temperature resistance of 800°C and above and a thickness of 0.04mm-0.11mm, bonded with a 0.2mm thick ceramic fiber layer 4 through an adhesive 3 composition.
Embodiment 2
[0016] Embodiment 2: Referring to FIG. 4 , as in Embodiment 1, the fire-resistant insulating tape adopts a double-sided double-base cloth structure, and the ceramic fiber 4 is in the middle of the two base cloths 1 .
[0017] The ceramic fiber can adopt the above-mentioned various ceramic fibers, and forms such as felt cloth, laminated cloth, and woven cloth, and the base tape can also use other base tape carriers that are suitable for manufacturing and molding.
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Abstract
Compared with prior art, the improved fire-proof insulation tape comprises the fire-proof insulation layer as ceramic fiber with melting point over 1250Deg, and can bear temperature more than 1600Deg for scores days. Wherein, the ceramic fiber bonds with the base tape well, have super plasticity, and can keep the layer integrity. This invention belongs to full-new invention and fit to spread widely.
Description
technical field [0001] The invention relates to the improvement of the fire-resistant insulating tape for cables, in particular to a fire-resistant insulating tape with high refractoriness, good flexibility and long service life after being ignited. Background technique [0002] The wrapped type fire-resistant insulating tape for cables is usually made of glass fiber 1 as the base tape, and is composed of a thin flake mica layer 2 pasted by an adhesive 3. Its structure has a single-base fire-resistant insulating tape (Figure 1) and a double-base fire-resistant insulating tape ( Figure 2) Two types, according to the requirements of refractoriness, grade A (fire resistance 1000°C) uses synthetic fluorine phlogopite, grade B (fire resistance 750-850°C) uses phlogopite, and currently wrapping type fire-resistant flexible cables use this fire-resistant insulation bring. The disadvantages of this type of fire-resistant insulating tape are: 1. The cohesive force between mica and a...
Claims
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IPC IPC(8): H01B7/295H01B3/00C09K21/00
Inventor 胡富庆
Owner WUXI HUANCABLE