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Lead stabilizer dispersion in PVC
Author(s) -
Marx M. Fred
Publication year - 1982
Publication title -
journal of vinyl technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.295
H-Index - 35
eISSN - 1548-0585
pISSN - 0193-7197
DOI - 10.1002/vnl.730040107
Subject(s) - stabilizer (aeronautics) , lead (geology) , dispersion (optics) , smoothness , pallet , plastics extrusion , raw material , materials science , environmental science , process engineering , composite material , mechanical engineering , engineering , chemistry , mathematics , organic chemistry , geomorphology , optics , geology , mathematical analysis , physics
As a major consumer of lead stabilizers used in PVC wire and cable compounds, Western Electric raw material inspection personnel have seen a decline of lead stabilizer dispersion quality. For this reason, the dispersion of lead stabilizer is of major concern to us. Marginally dispersed stabilizers cause an excessive collection of lead compound on the extruder screen pack and eventual rupture of the screen. Marginal dispersion detracts from extrusion smoothness of high‐speed, thin‐wall wire insulation. Stabilizer manufacturers have acknowledged that dustless versions of their products are more difficult to disperse. Lead suppliers must meet OSHA regulations that limit employees' exposure to inorganic lead compounds. They are using different approaches that are producing a proliferation of packages as well as stabilizer surface treatments. Dispersion quality has varied from supplier to supplier and from lot to lot. Obviously, compounders find it difficult to agree on a solution to the problem. The use of bulk returnable air pallets and standard non‐treated stabilizer would satisfy dust‐level requirements, eliminate the need for additive treatment, and solve potential bag disposal restrictions.