Introduction
Securing 3D printed parts together often requires the use of adhesives specifically suited to the material type. Different filaments like PLA, ABS, and PETG have unique properties that make certain adhesives more effective than others. Here’s a guide on the best adhesives for gluing your 3D prints made from PLA, ABS, and PETG.
PLA (Polylactic Acid)
1. Super Glue (Cyanoacrylate)
Tip: Use super glue for quick and strong bonds.
Explanation: Super glue is commonly used for PLA due to its fast curing time and strong adhesion. It forms a solid bond within seconds, making it ideal for quick fixes and small assemblies. Apply a small amount to both surfaces and press them together until the bond sets.
2. Epoxy
Tip: Choose epoxy for a robust and durable bond.
Explanation: Epoxy adhesives provide a very strong and durable bond for PLA parts. They are particularly useful for larger pieces or structural components. Mix the two-part epoxy and apply it evenly to the joining surfaces. Clamp the parts together until the epoxy cures fully.
ABS (Acrylonitrile Butadiene Styrene)
1. Acetone
Tip: Use acetone as a solvent welding agent for ABS.
Explanation: Acetone can dissolve ABS, allowing you to “weld” parts together. Apply a small amount of acetone to the surfaces you wish to bond using a brush or cotton swab. Press the parts together and hold them in place until the acetone evaporates, creating a fused joint.
2. ABS Slurry
Tip: Create an ABS slurry by dissolving ABS filament in acetone.
Explanation: An ABS slurry provides a thicker adhesive that can fill gaps and create a strong bond. Mix small pieces of ABS filament with acetone until you achieve a paste-like consistency. Apply the slurry to the parts and press them together until the bond sets.
PETG (Polyethylene Terephthalate Glycol-Modified)
1. Super Glue (Cyanoacrylate)
Tip: Use super glue for PETG for quick and reliable bonds.
Explanation: Super glue works well with PETG, offering a strong and fast-setting bond. Ensure the surfaces are clean and dry before applying a small amount of glue. Press the parts together firmly and hold until the glue cures.
2. Polyurethane Adhesive
Tip: Opt for polyurethane adhesive for a flexible and durable bond.
Explanation: Polyurethane adhesives create a flexible bond that is resistant to impact and vibrations, making them ideal for PETG parts. Apply the adhesive to the surfaces and clamp them until fully cured. This type of adhesive is excellent for parts that will undergo stress or movement.
General Tips for Gluing 3D Prints
- Surface Preparation: Make sure the surfaces to be bonded are clean, dry, and free of any grease or debris. Lightly sanding the surfaces can also help improve adhesion.
- Clamping: Use clamps or weights to hold the parts together while the adhesive cures. This ensures a stronger bond and prevents movement during the curing process.
- Test Bonds: Before committing to gluing critical parts, test the adhesive on small pieces to ensure compatibility and strength.
Conclusion
Choosing the right adhesive for your 3D printed parts is crucial for achieving strong and durable bonds. Whether you’re working with PLA, ABS, or PETG, understanding the properties of each material and using the appropriate adhesive will lead to better results. Experiment with these recommendations to find the best solution for your specific project needs.