90-degree special temperature selflimiting electric tracing band
An electric heating cable and self-limiting temperature technology, which is applied in the field of wire and cable, can solve the problems of damage to polymer materials, shortened service life, and failure to reach the maximum maintenance temperature, so as to improve the positive temperature coefficient effect and solve the problem of service life. Effect
Inactive Publication Date: 2012-01-25
芜湖科阳新材料股份有限公司
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Problems solved by technology
In northern China, the temperature difference between winter and summer can reach 70 degrees Celsius, and the surface temperature of the electric heating cable installed on the solar water heater can reach 95-100 degrees Celsius under direct sunlight in summer. The maximum maintenance temperature of the traditional solar electric heating cable is 70± 5 degrees Celsius, this kind of electric heating cable in the temperature control field, after a summer of high temperature exposure, the PTC polymer material will be obviously damaged, and the maximum maintenance temperature cannot be reached during winter use, and the service life is greatly reduced
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[0012] Such as figure 1 , 2 As shown, the electric heating cable for 90 degrees Celsius includes two tinned copper conductive cores 1, and the tinned round copper conductive core 1 is coated with PCT material layer 2, polyethylene insulating inner sheath 3, and aluminum-magnesium alloy shielding Layer 4, polyethylene insulating outer sheath 5;
[0013] Each raw material component of described PTC material is by weight ratio: high-density polyethylene (HDPE) 86.5, carbon black (CB) 13, thermal stabilizer tribasic lead sulfate (3PbO-PbSO4-H2O) 0.12, silicon Lead acid (PbSiO3) 0.05, antioxidant styrenated phenol 0.1, light stabilizer p-tert-butylphenyl salicylate (TBS) 0.13, flame retardant tribromophenol (TBP) 0.1.
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The invention discloses a 90-degree special temperature selflimiting electric tracing band, which comprises a conductive core, and a PTC material layer, a polymer insulating inner protective sleeve, an aluminum-magnesium alloy shielding layer and a polymer insulating outer protective sleeve which are covered outside the conductive core in turn, wherein the PTC material layer comprises the following raw material components in part by weight: high-density polyethylene 86-87, carbon black 12-14, tribasic lead sulfate heat stabilizer 0.11-0.13, lead silicate 0.04-0.06, styrenated phenol antioxygen 0.05-0.15, p-tert-butylphenyl salicylate light stabilizer 0.12-0.14 and tribromophenol fire retardant 0.05-0.15. The highest temperature of the band is maintained at 90+ / -5 DEG C, and the band can be used as solar electric tracing band in places with large temperature difference.
Description
technical field [0001] The invention relates to the field of electric wires and cables, in particular to a special self-limiting temperature electric heating cable for 90 degrees Celsius. Background technique [0002] Electric heating cable is a new high-tech product. Since its application in 1971, self-limiting electric heating cable has become the most common type of electric heating cable in the world today. They can be widely used in the transportation of liquid objects in pipelines, antifreeze and heat preservation of tanks, maintenance of process temperature, heating of roads, ramps, crosswalks, eaves and floors, etc. Inside the self-limiting electric heat tracing, PTC polymer material for heating is distributed between the two conductive cores, and its exterior is composed of polymer inner sheath, alloy shielding net and polymer outer sheath (pictured. When the temperature is turned on, the internal PTC polymer material expands when heated, the resistance becomes lar...
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IPC IPC(8): H05B3/56C08L23/06C08K13/02C08K3/04C08K3/30C08K3/34C08K5/13C08K5/134
Inventor 凌钧胡莉萍周能芳
Owner 芜湖科阳新材料股份有限公司
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