why do you want to use the halogen free material？

With the development of the industry, we are increasingly demanding to PCB material.
Electronic waste, bromine and chlorine compounds plastic products containing halogen flame retardant,

PVC, when these products waste burning, easy to produce harmful substances dioxin and acid gas (HCl),

through the biological accumulation, damage to the environment and human health, the United Nations

international environmental planning has its list of persistent organic pollutants (pops).
Halide widely exist in printed circuit board, welding mask, molding compounds, connectors, and other

common electronic products.Such as printed circuit boards in flame retardant containing halogen

material, PBB and PBDE toxicity is the most care about people.Circuit boards and electronic products

containing halogen in the case of incomplete combustion will produce many byproducts, including

dioxins, dioxin and furan compounds (furan - like compound), and acid or corrosive gas, these

potentially harmful to environment and human health.At present most of the electric power and

communication cable containing halogen, the cable will emit poisonous fog when burnt chemicals.In the

event of fire, acid gases from the burning of cables will damage people's nose, mouth and throat,

smoke can also make people lost, is difficult to escape the scene of the fire.So the EU ROHS

regulations banning in printed circuit board using PBB and PBDE contains both halide material.Now

someone is trying to contain halogen in electronic devices limit the use of all materials.When

burned, they argue, electronics, bromide material will generate toxic dioxins.They called for a ban

on the use of containing halogen material beyond the ROHS initially limit PBB and PBDE.


Halogen free may be after July 1, 2006 ROHS (harmful substances limits) instruction since electronic

industry and a green revolution.Compared to the dangers of halide, ROHS directive restricting the use

of six kinds of harmful substances of Cd and Pb (lead, cadmium, mercury, Hg, hexavalent chrome CR6, +

4 kinds of heavy metals and  PBDE, two kinds of flame retardants polybrominated biphenyl PBB) risks

more spectacularly.


Among them, the lead can harm the nervous system directly;Cadmium can cause harm to the bone,

kidneys, the respiratory system.Mercury will harm the central nervous system and kidney

system;Hexavalent chromium can cause inherited gene defects;  PBDE and polybrominated biphenyl are

strong carcinogenic and teratogenic substances.


From lead free and ROHS to halogen free to Norway for POHS instructions to ban the use of 18 kinds of

harmful substances, increasingly stringent environmental requirements for the materials not only can

significantly reduce the pollution to the environment of electronic products, also can effectively

protect our health.