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[Decrease in the n-hexane risk in shoe manufacturing industry]

R Agnesi1, F Valentini, L Dal Vecchio

  • 1Regione Veneto, ULSS 18 Riviera del Brenta, Settore Igiene Pubblica.

La Medicina Del Lavoro
|July 1, 1994
PubMed
Summary

Shoe factory glues in Italy now contain less n-hexane due to solvent changes. This reduces n-hexane exposure risks for workers, but glue analysis is now vital for health monitoring.

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Area of Science:

  • Occupational Health
  • Industrial Toxicology
  • Chemical Safety

Background:

  • The shoe manufacturing industry in the Riviera del Brenta region has seen significant shifts in industrial glue composition.
  • A notable trend is the progressive reduction in the use of n-hexane, a common solvent with known health risks.
  • This change is driven by the industry's move towards refinery products with lower n-hexane content (<5%).

Purpose of the Study:

  • To investigate the evolving composition of industrial glues used in shoe manufacturing.
  • To assess the potential health risks associated with current solvent exposures in the workplace.
  • To determine the necessity of pre-health monitoring assessments based on glue formulations.

Main Methods:

  • A comprehensive survey was conducted across 337 gluing stations in 105 shoe factories.

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  • Analysis of 104 different commercial glue products containing organic solvents was performed.
  • Identification of frequently used solvents such as ethyl acetate, cyclo-hexane, hexane isomers, methyl ethyl ketone, heptane, and acetone.

    • Main Results:

    • A considerable reduction in n-hexane content was observed in the glues used.
    • Only approximately 10% of gluing stations and 8% of commercial products still utilize technical hexane mixtures, posing a potential health risk.
    • A variety of alternative organic solvents are now prevalent in industrial adhesives.

    Conclusions:

    • The shift away from high n-hexane content glues has likely reduced overall exposure risks in the shoe industry.
    • However, the presence of n-hexane in specific products necessitates continued vigilance.
    • Pre-assessment of glue composition is crucial before implementing occupational health monitoring programs for exposed workers.