Understanding the Differences Between Bondene Styrene PLA-3 and Plastic Weld Cement PLA-2

Two commonly used adhesives from Plastruct are Bondene Styrene and ABS Plastic Solvent Cement PLA-3 and Plastic Weld Cement PLA-2.

While both are designed for plastics, they have specific differences in their chemical compositions, application methods, and bonding strengths. Here’s a breakdown of each and what makes them unique.

1. Plastruct Bondene Styrene and ABS Plastic Solvent Cement PLA-3

• Composition and Solvent Action: PLA-3 is a solvent-based cement specifically formulated for bonding styrene and ABS (Acrylonitrile Butadiene Styrene) plastics. It works by chemically melting the surface of the plastic, essentially fusing the pieces together when the solvent evaporates. This creates a very strong, permanent bond that is ideal for these types of plastics.

• Plastic Compatibility: This cement is best used for polystyrene (styrene) and ABS. If you are working with plastic sheets, rods, or parts made of either of these materials, PLA-3 is designed to give a strong bond by softening the material at the molecular level.

• Application and Drying Time: Bondene PLA-3 typically has a relatively fast drying time, depending on the thickness of the material being bonded. The bond is formed as the solvent evaporates, which leaves behind a solid weld between the surfaces. It’s applied with a brush or a fine applicator, allowing for precise bonding in modeling and 3D printing projects.

• Strength of Bond: Because PLA-3 chemically welds the plastics together, the resulting bond is extremely strong, often stronger than the plastic itself. It’s particularly suitable for structural joins where strength is critical.

• Common Use Cases: PLA-3 is ideal for model-making, architectural modeling, and repairs where you are working with styrene or ABS. If your 3D prints are made from ABS or you’re using polystyrene sheets, this cement will provide a durable bond.

2. Plastruct Plastic Weld Cement PLA-2

• Composition and Solvent Action: Plastic Weld Cement PLA-2, on the other hand, is a multi-purpose cement that is more versatile in terms of the plastics it can bond. PLA-2 contains a stronger solvent mixture capable of bonding a broader range of plastics, including styrene, ABS, acrylic, and Butyrate.

• Plastic Compatibility: PLA-2 is designed for styrene, ABS, acrylic, butyrate, and several other plastics. This versatility makes it an excellent option for projects involving multiple types of plastics or materials where the plastic type is uncertain. However, it is not suitable for polycarbonates or polyethylenes, which do not respond well to solvent-based cements.

• Application and Drying Time: Similar to PLA-3, PLA-2 is applied with a brush or applicator for precision. Its drying time is quick, but not quite as fast as some other solvent cements. This gives you a little more time to position your parts before the solvent evaporates and the plastic hardens. The final bond is formed once the solvent evaporates, leaving a welded joint.

• Strength of Bond: PLA-2 also forms a strong bond but tends to be slightly less aggressive than PLA-3 in terms of melting the plastic. This can be beneficial if you are working with more delicate parts or plastics like acrylic, which can sometimes react too aggressively to strong solvents.

• Common Use Cases: PLA-2 is ideal for general-purpose use when you are working with different types of plastics in a single project. If you’re bonding styrene to acrylic or other materials, PLA-2 provides flexibility and a reliable bond.

• Plastic Compatibility:PLA-3 is more specialized, designed for styrene and ABS.
  PLA-2 is versatile, working with styrene, ABS, acrylic, butyrate, and others.
  

• Bond Strength:PLA-3 forms an extremely strong bond with styrene and ABS, suitable for load-bearing or structural joints.
  PLA-2 also forms a strong bond but is more flexible and less aggressive, making it better for multi-plastic applications or more delicate work.
  

• Temps de séchage:Both cements dry relatively quickly, but PLA-2 may give slightly more working time due to its less aggressive solvent action.
  

• Use Cases:PLA-3 is best for projects using styrene and ABS and provides a very strong, permanent bond.
  PLA-2 is ideal for multi-plastic projects or when you’re unsure of the plastic type, offering more flexibility in terms of materials.