TBLS
Tribasic lead sulphate — a heat stabiliser for rigid PVC and cable compounds.
Overview
TBLS (tribasic lead sulphate, 3PbO·PbSO₄·H₂O) is a white, free-flowing powder used as a heat stabiliser in PVC processing. It provides long-term heat stability and good electrical insulation properties, which is why it is widely used in rigid PVC and in cable compounds. It has little lubricating effect of its own, so it is normally used together with a lubricant such as a metallic stearate.
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Applications
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