HIPS (High Impact Polystyrene) filament can be dissolved using specific chemical solvents, primarily limonene and acetone.
HIPS is often used in 3D printing as a support material because it is easily dissolved, leaving the main print intact.
Solvents for Dissolving HIPS
Based on the provided information, the main solvents effective for dissolving HIPS filament are:
- Limonene: An organic solvent derived from citrus fruits. It is effective for dissolving HIPS and is often preferred as a safer alternative to stronger chemicals like acetone. However, unlike some other filaments (like ABS), you cannot use limonene fumes to smooth HIPS; you need direct contact.
- Acetone: A common organic solvent. Acetone is also highly effective at dissolving HIPS.
| Solvent | Key Characteristic | Application Method (for dissolution/smoothing) |
|---|---|---|
| Limonene | Citrus-based, less volatile | Requires direct immersion (e.g., a bath) |
| Acetone | Fast-acting, more volatile | Direct contact (liquid or vapor) |
How to Use Limonene for HIPS
The provided reference specifically details the method for using limonene:
- Prepare a Limonene Bath: Pour limonene into a suitable container.
- Immerse the HIPS Part: Carefully place the HIPS model or support structure into the limonene bath.
- Soak Time: The reference suggests soaking for "several seconds (10-20 s should be enough)" for smoothing, but dissolving a solid structure will require a significantly longer duration, potentially hours or even days, depending on the size and thickness of the HIPS part. Monitor the process closely.
- Removal and Cleaning: Once the HIPS has dissolved sufficiently or completely, remove the remaining print and rinse it to remove any residual limonene.
Note: The reference explicitly states that with limonene, you cannot utilize its fumes for smoothing or dissolving HIPS; direct liquid contact is necessary.
Safety Considerations
When working with solvents like limonene and acetone, always prioritize safety:
- Ventilation: Work in a well-ventilated area or under a fume hood.
- Personal Protective Equipment (PPE): Wear chemical-resistant gloves and eye protection.
- Fire Safety: Both limonene and acetone are flammable. Keep them away from open flames, sparks, and heat sources.
- Disposal: Dispose of used solvents and dissolved material according to local regulations.
Using these solvents allows for the effective removal of HIPS, particularly when it serves as sacrificial support in complex 3D prints.
