how to improve seal adhesion of PLA sheets

Improving seal adhesion of PLA (Polylactic Acid) sheets is important when using them for sealing applications. Here are some tips to improve the seal adhesion of PLA sheets:

  1. Use a PLA Compound, it can achieve higher shear strengths by adding for example VAE powder (DPP-VAE). DPP-VAE can be water solluble and therefore end products can still meet compostability regulations. VAE on it’s own is not yet fully biodegredeable. Biobased VAE is limited available.
  2. Clean the surfaces: Before sealing the PLA sheets, make sure to clean the surfaces thoroughly using isopropyl alcohol or a specialized cleaning solution. This will help to remove any dirt, oil, or other contaminants that could affect the adhesion.
  3. Increase temperature and pressure: When sealing PLA sheets, it is important to use high temperature and pressure to create a strong bond. The exact temperature and pressure will depend on the type of sealing method being used, but in general, higher temperatures and pressures will improve adhesion.
  4. Use a proper adhesive: Using a proper adhesive can help to improve the seal adhesion of PLA sheets. Some common adhesives for PLA include cyanoacrylate (super glue), epoxy, or specialized adhesives designed for use with PLA.
  5. Use a textured surface: Textured surfaces can help to improve adhesion between the PLA sheets and the adhesive. Consider using a textured surface or sanding the surface of the PLA sheets to create a better bond.
  6. Use a primer: Some primers, such as acrylic or vinyl primers, can help to improve the adhesion of PLA sheets. Applying a thin layer of primer to the surface of the PLA sheets before applying the adhesive can help to create a stronger bond.

By following these tips, you can improve the seal adhesion of PLA sheets and create strong, reliable seals.