home > news > gui chao cable news: how to choose a high temperature resistant wire and cable?
industry dynamic
gui chao cable news: how to choose a high temperature resistant wire and cable?
from：guichao author：admin click： 316 addtime：2017-03-09 10:07:54
the general electric wire and cable is made of plastic and rubber,
it has rich source, can satisfy the mass production, and the cost is relatively low.
but for some special industries such as petrochemical, steel, aerospace, shipbuilding, military, pharmaceutical, food, plastic machinery,
boiler and heat and high temperature related industries, all need to be able to withstand a certain temperature of wire and cable, ordinary wire and cable can not be used,
high temperature resistant wire and cable to need to ensure the safe operation of the power and signal.
with the rapid development of china's economy, the demand for high temperature cables in special industries has been increasing rapidly
the heat resistant and high temperature cables are growing at a rate of 20% per year,
has a strong vitality, in short supply, china's annual imports from abroad about two billion yuan for domestic construction.
the international electrotechnical commission (iec) provides for the general classification of heat resistant grades of insulation:
heat resistance grade yaebfhc
maximum allowable working temperature is greater than or equal to 180 deg c / 90105120130155180
our common wire and cable insulation and sheath for ordinary engineering rubber and plastics as the basic resin,
but the insulation level is required. the common cable with rubber materials are: ding the rubber, ethylene propylene rubber, natural rubber and chlorosulfonated polyethylene etc.,
the working temperature is (60 ~ 75) c; the common plastic materials used in the cable are polyvinyl chloride, polyethylene (including crosslinked polyethylene) and polypropylene,
operating temperature (70 ~ 90). it can be seen that these cables are not strictly resistant to heat or high temperature cables.
heat resistant cable generally refers to (90 ~ 155) and below the temperature of the cable, while the high temperature cable is more than 180 deg c cable.
in order to solve the problem of ordinary cable is not high temperature, it is necessary to improve the material, or the use of high temperature resistant insulation materials.