High-quality PI tape is generally RoHS/REACH-compliant and free from heavy metals or harmful substances, but buyers should confirm with supplier test reports to ensure full environmental compliance.
Polyimide (PI) tape is widely used in electronics, aerospace, automotive, and industrial insulation, prized for its excellent heat resistance, dielectric strength, and mechanical stability. However, as environmental regulations tighten worldwide, many buyers—especially in the EU, US, and Japan—want to know: Does PI tape contain heavy metals or harmful substances?
1) Common Environmental Regulations Affecting PI Tape
RoHS (Restriction of Hazardous Substances) – Limits levels of lead (Pb), cadmium (Cd), mercury (Hg), hexavalent chromium (Cr6+), and certain flame retardants (PBB, PBDE).
REACH (Registration, Evaluation, Authorisation and Restriction of Chemicals) – Controls the use of Substances of Very High Concern (SVHC).
California Proposition 65 – Requires warnings for products containing chemicals known to cause cancer or reproductive harm.
2) Composition of Standard PI Tape
A typical PI tape consists of:
Polyimide base film – Usually free of heavy metals; made from aromatic polyimide polymers.
Adhesive layer – Often silicone or acrylic-based; high-quality grades avoid restricted substances.
Release liner (optional) – Generally PET or coated paper.
3) Potential Risk Points for Harmful Substances
While PI film itself is typically non-toxic and compliant, risks can arise from:
Low-grade adhesives containing residual solvents or restricted flame retardants.
Pigments or dyes in colored PI tape that may contain trace heavy metals.
Contaminated raw material sources in uncontrolled supply chains.
4) How Manufacturers Ensure Compliance
Supplier material declarations and third-party lab testing (e.g., SGS, Intertek)
Use of RoHS/REACH-compliant adhesives and pigments
Periodic batch sampling for heavy metal and SVHC testing
Maintaining full traceability of material sources
5) Why Compliance Matters for Buyers
Avoids import/export rejection in regulated markets
Protects end-user safety and brand reputation
Ensures alignment with corporate sustainability goals
Conclusion
Most reputable PI tape on the market today is free from heavy metals and harmful substances, complying with RoHS and REACH standards. However, buyers should request compliance certificates and lab test reports from suppliers to verify quality and safety before bulk purchasing.
