Introduction
Choosing the right adhesive for your 3D printed projects is crucial for ensuring strong and durable bonds between parts. Different materials like PLA, ABS, and PETG each have unique properties that require specific types of glue. This guide explores the best glues for these popular 3D printing materials, providing recommendations and tips for optimal use.
Best Glue for PLA (Polylactic Acid)
PLA is a biodegradable thermoplastic derived from renewable resources like corn starch or sugarcane. It’s known for its ease of use and good surface finish but can be challenging to bond due to its slick surface.
- Cyanoacrylate (Super Glue):
- Brand Recommendations: Loctite Super Glue, Gorilla Super Glue
- Properties: Fast-setting, strong bond, easy to apply
- Usage Tips: Ensure surfaces are clean and dry. Apply a small amount of glue and press parts together firmly for a few seconds.
- Epoxy Adhesives:
- Brand Recommendations: J-B Weld, Devcon Epoxy
- Properties: Extremely strong, gap-filling, resistant to impact and chemicals
- Usage Tips: Mix resin and hardener as per instructions. Apply to both surfaces and clamp parts together for the recommended curing time.
- Hot Glue:
- Brand Recommendations: Surebonder, AdTech
- Properties: Quick setting, flexible bond, easy to apply
- Usage Tips: Use a high-temperature glue gun for best results. Apply evenly to one surface and press parts together immediately.
| Glue Type | Brand Recommendations | Properties | Usage Tips |
|---|---|---|---|
| Cyanoacrylate (Super Glue) | Loctite, Gorilla | Fast-setting, strong bond | Clean surfaces, press firmly for a few seconds |
| Epoxy Adhesives | J-B Weld, Devcon | Extremely strong, gap-filling | Mix well, clamp parts together |
| Hot Glue | Surebonder, AdTech | Quick setting, flexible bond | Use high-temp glue gun, apply evenly |
Best Glue for ABS (Acrylonitrile Butadiene Styrene)
ABS is a strong, durable plastic often used for functional parts and prototypes. It has good mechanical properties but can be tricky to bond due to its resistance to many adhesives.
- Acetone:
- Properties: Dissolves ABS to create a weld-like bond
- Usage Tips: Apply acetone with a brush to both surfaces, press together, and hold until set. Use in a well-ventilated area.
- ABS Slurry:
- Ingredients: ABS filament + Acetone
- Properties: Creates a strong, chemical bond
- Usage Tips: Dissolve ABS filament in acetone to create a slurry. Apply to surfaces and press parts together.
- Two-Part Epoxy:
- Brand Recommendations: J-B Weld, Gorilla Epoxy
- Properties: Very strong, resistant to impact and temperature changes
- Usage Tips: Mix equal parts of resin and hardener. Apply to surfaces and clamp for the recommended curing time.
| Glue Type | Brand Recommendations | Properties | Usage Tips |
|---|---|---|---|
| Acetone | N/A | Dissolves ABS for weld-like bond | Apply with brush, use in well-ventilated area |
| ABS Slurry | N/A | Strong chemical bond | Dissolve ABS in acetone, apply and press |
| Two-Part Epoxy | J-B Weld, Gorilla Epoxy | Very strong, impact-resistant | Mix well, clamp parts together |
Best Glue for PETG (Polyethylene Terephthalate Glycol)
PETG is a versatile material that combines the ease of printing of PLA with the strength and durability of ABS. However, it can be challenging to bond due to its chemical resistance.
- Cyanoacrylate (Super Glue):
- Brand Recommendations: Loctite Super Glue, Gorilla Super Glue
- Properties: Fast-setting, strong bond, easy to apply
- Usage Tips: Clean surfaces thoroughly. Apply a small amount of glue and hold parts together for a few seconds.
- High Strength Epoxy:
- Brand Recommendations: Devcon Epoxy, Permatex Epoxy
- Properties: Extremely strong, gap-filling, durable
- Usage Tips: Mix resin and hardener according to instructions. Apply to both surfaces and clamp parts together for curing.
- Polyurethane Adhesive:
- Brand Recommendations: Gorilla Glue, Elmer’s Ultimate
- Properties: Expands while curing, creating a very strong bond
- Usage Tips: Dampen surfaces slightly before application. Apply glue and clamp parts together for curing time.
| Glue Type | Brand Recommendations | Properties | Usage Tips |
|---|---|---|---|
| Cyanoacrylate (Super Glue) | Loctite, Gorilla | Fast-setting, strong bond | Clean surfaces, press firmly for a few seconds |
| High Strength Epoxy | Devcon, Permatex | Extremely strong, gap-filling | Mix well, clamp parts together |
| Polyurethane Adhesive | Gorilla Glue, Elmer’s Ultimate | Expands while curing, very strong bond | Dampen surfaces, apply and clamp |
Application Tips for Optimal Bonding
- Surface Preparation:
- Cleaning: Ensure surfaces are clean and free from dust, grease, or oils. Use isopropyl alcohol for cleaning.
- Sanding: Lightly sand the bonding surfaces with fine-grit sandpaper to increase adhesion.
- Clamping:
- Pressure: Apply even pressure using clamps to hold parts together while the adhesive cures.
- Time: Follow the manufacturer’s recommended curing time for the best results.
- Ventilation:
- Safety: Use adhesives in a well-ventilated area to avoid inhaling fumes. Wear protective gloves and goggles if necessary.
- Testing:
- Test Pieces: Before working on your final project, test the adhesive on scrap pieces to ensure compatibility and strength.
Conclusion
Choosing the right adhesive for your 3D printed parts made from PLA, ABS, and PETG is essential for achieving strong and durable bonds. By understanding the properties of each material and selecting the appropriate glue, you can ensure the success of your projects. Always follow the manufacturer’s guidelines and take proper safety precautions when working with adhesives.