Permanent Static Dissipative Agent Polyether Amide Polymer, Humidity-Independent Non-Blooming for Engineering Plastic Electronic Parts
This permanent static dissipative agent is a high‑performance polyether amide polymer designed for engineering plastic modification. Unlike migratory low‑molecular antistatic surfactants whose effectiveness relies on surface moisture absorption, this block copolymer forms continuous intrinsic conductive micro‑networks throughout the polymer bulk. It delivers humidity‑independent static‑dissipating performance without surface blooming or oily exudate. It is suitable for injection‑molded electroni
Product DetailsPolyether amide block copolymer consists of rigid polyamide hard segments and hydrophilic polyether soft segments. It is supplied as uniform pellets for twin‑screw compounding. During melt compounding with host engineering plastics, under controlled thermal‑shear conditions, the dispersed polyether amide micro‑phases interconnect to construct stable three‑dimensional conductive pathways distributed inside the whole plastic section. Static charges dissipate rapidly via these embedded internal conductive channels instead of depending on a thin hydrophilic surface film.
The non‑blooming characteristic originates from its high‑molecular‑weight macromolecular structure. The polymer chains are locked within the host resin matrix and cannot migrate outward to the part surface. There is no oily bleed, crystal precipitation or surface contamination. This property is critical for precision electronic plastic parts, where surface exudate would pollute circuit contact areas and cause electronic product malfunction. Static‑dissipating performance remains stable regardless of fluctuations of ambient humidity, delivering consistent antistatic property in both dry and humid working environments.
This antistatic polymer is normally processed by preparing concentrated antistatic masterbatch first. The masterbatch is then diluted with base engineering plastic resin for subsequent injection molding. For some resin systems with poor compatibility, appropriate compatibilizer is required to refine phase dispersion and prevent surface speckles or mechanical property deterioration.
Processing parameters need careful control. Excessively high barrel temperature and severe screw shear will trigger thermal‑oxidative degradation of hydrophilic polyether soft segments, destroying the internal conductive network and reducing static‑dissipating efficiency.
The recommended final loading dosage in finished engineering plastic parts ranges from 9 wt%‑18 wt%. The exact addition proportion should be adjusted according to target surface and volume resistivity as well as host resin compatibility. Pre‑production laboratory testing must evaluate melt‑flow property, phase dispersion status, surface and volume resistivity, mechanical retention, non‑blooming behaviour and long‑term thermal ageing stability.
Store pellet‑form polyether amide polymer in sealed moisture‑proof bags inside cool, dry and ventilated warehouse. Prevent moisture absorption prior to extrusion compounding. Avoid prolonged direct sunlight and high‑temperature storage. Reseal packaging immediately after opening to minimize hygroscopic risk.
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