Candidate List Duty Triggers in Component Level Imports
Candidate List duties trigger when any discrete component article exceeds 0.1 percent SVHC by weight, regardless of aggregate assembly mass.
Dechlorane Plus
Meaning
Chemical additive compounds provide flame retardancy in electrical resin formulations through chlorinated bicyclic structures that function in the condensed and gas phases during combustion. The chemical additive dechlorane plus functions as a non-plasticising flame retardant added to polyamides and polybutylene terephthalate compounds used in electrical connector housings. Its operational boundary is governed by global persistent organic pollutant regulations that restrict production and placement on markets due to bioaccumulation concerns in terrestrial food chains.
Thermal Performance
High thermal stability allows additives to survive elevated injection moulding temperatures without degrading resin matrix properties. Incorporating dechlorane plus into glass-filled nylon maintains heat deflection capability while achieving high flame retardancy classifications. Excessive melt temperatures during processing can release acidic breakdown products, damaging tool steel cavities and eroding barrel walls.
Regulatory Restriction
Environmental restrictions mandate the substitution of bioaccumulative halogenated additives with safer alternative compounds. Global restrictions on dechlorane plus force compounders to re-evaluate polymer formulations and redesign flame-retardant masterbatch packages. Moulders face severe compliance penalties if legacy inventory containing restricted additives enters regulated export markets.
Compound Formulation
Synergistic additives such as antimony trioxide are combined with chlorinated flame retardants to maximize flame resistance. Formulations containing dechlorane plus require precise compounding screw design to ensure uniform dispersal throughout the polymer matrix. Material datasheets must detail precise additive concentrations for verification.