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<p>Ensuring food safety requires materials that can withstand rigorous cleaning processes without degradation. This study investigates PA12 (nylon 12) parts manufactured using Selective Laser Sintering (SLS) 3D printing technology, both untreated and treated with VaporFuse Surface (VFS). The samples were immersed in various cleaning agents commonly used in the food industry to assess their chemical resistance, thermal stability and physical properties. While treated parts (VFSPA12) showed slightly higher mass loss than untreated samples (PA12), this loss remained below 3%. Furthermore, the VFS treatment improved the surface finish of the PA12 parts, making them smoother and potentially more hygienic. Additionally, treated parts showed less color change than the untreated ones when immersed in solution 130I, indicating better resistance to visual degradation. Mechanical properties were evaluated through tensile tests, while thermal stability was assessed via thermogravimetric analysis (TGA). Degradation kinetics showed that at 5&#xa0;°C/min, treated samples had a lower onset degradation temperature than the untreated samples, but at 20&#xa0;°C/min, curves for both materials overlapped, suggesting faster heat application minimizes this difference. The findings suggest that: (a) the treated samples are promising for applications requiring enhanced surface smoothness and hygiene; and (b) the untreated samples are still more suitable for applications that demand higher chemical resistance and thermal stability. This research underscores the potential of using advanced polymer to meet strict food industry hygiene standards while maintaining durability. Future studies should explore long-term durability and the interaction of these materials with various food substances to further validate their suitability for widespread adoption in food processing applications.</p>

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Evaluation of the chemical resistance of selective laser-sintered PA12 pieces for food industry machinery applications

  • 期刊论文

  • 发表日期：

    2025年8月23日

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  • Elizabeth Cristine Adam Trindade,
  • Malek Ouichka,
  • Othmane Rayan,
  • Jean-Sébastien Deschênes,
  • Jean Brousseau

摘要

Ensuring food safety requires materials that can withstand rigorous cleaning processes without degradation. This study investigates PA12 (nylon 12) parts manufactured using Selective Laser Sintering (SLS) 3D printing technology, both untreated and treated with VaporFuse Surface (VFS). The samples were immersed in various cleaning agents commonly used in the food industry to assess their chemical resistance, thermal stability and physical properties. While treated parts (VFSPA12) showed slightly higher mass loss than untreated samples (PA12), this loss remained below 3%. Furthermore, the VFS treatment improved the surface finish of the PA12 parts, making them smoother and potentially more hygienic. Additionally, treated parts showed less color change than the untreated ones when immersed in solution 130I, indicating better resistance to visual degradation. Mechanical properties were evaluated through tensile tests, while thermal stability was assessed via thermogravimetric analysis (TGA). Degradation kinetics showed that at 5 °C/min, treated samples had a lower onset degradation temperature than the untreated samples, but at 20 °C/min, curves for both materials overlapped, suggesting faster heat application minimizes this difference. The findings suggest that: (a) the treated samples are promising for applications requiring enhanced surface smoothness and hygiene; and (b) the untreated samples are still more suitable for applications that demand higher chemical resistance and thermal stability. This research underscores the potential of using advanced polymer to meet strict food industry hygiene standards while maintaining durability. Future studies should explore long-term durability and the interaction of these materials with various food substances to further validate their suitability for widespread adoption in food processing applications.