Understanding the Waterproof Properties of PLA Filament
When considering the waterproof capabilities of PLA filament, it’s essential to recognize its inherent characteristics. PLA, which is derived from renewable resources like cornstarch or sugarcane, is not particularly known for being waterproof. However, it does perform adequately when exposed to cold water, meaning it can manage minor moisture situations. Nevertheless, when faced with hot water or prolonged exposure to moisture, PLA’s performance can diminish.
Does Printed PLA Handle Moisture?
The impact of water on printed PLA objects is worth discussing. While PLA itself or other materials like ABS remain largely unaffected in immediate interactions with water, the 3D printing process introduces tiny gaps between layers. These gaps often allow liquids to seep through, resulting in a generally non-watertight structure. Hence, while printed PLA might tolerate some exposure to water, it is not designed for situations where it would be submerged or consistently wet.
Choosing the Right Materials for Waterproof Applications
For projects requiring effective waterproofing, opting for alternative materials is advisable. One notable option is Polypropylene reinforced with 30% glass fiber (PP GF30). This filament excels not only in waterproofing but also shows resistance to extreme temperatures, UV light, and various chemicals. Given its durability, this material is an excellent choice for outdoor or industrial applications.
The Water Resistance of 3D Prints
A significant consideration when working with 3D printed objects is their overall water resistance. Generally, standard 3D prints are not waterproof due to the layering process, which leaves minute spaces within the object. For enhanced water resistance, careful design modifications, like creating airtight models, are necessary. Otherwise, conventional prints will struggle to maintain integrity when exposed to water.
Impacts of Water Exposure on PLA
Water exposure can have detrimental effects on PLA prints. PLA tends to absorb moisture, leading to a decrease in structural integrity. As moisture levels rise, the material’s strength diminishes, resulting in prints that may be softer, texture inconsistent, and prone to imperfections. This degradation manifests as rough surfaces, bubbling, and stringing.
Durability of PLA Over Time
When kept indoors and away from heavy mechanical loads, PLA prints have excellent longevity. Anecdotal evidence suggests that PLA objects can last upwards of 15 years in a controlled indoor environment. This makes PLA a suitable choice for decorative items and gifts where high mechanical strength is not a primary concern.
Cleaning and Maintaining PLA Prints
For maintenance, cleaning PLA prints requires caution. Washing in hot water or using a dishwasher can lead to warping or deformation, given PLA’s sensitivity to heat. Therefore, it is advisable to clean these items with mild soap and cool water to prolong both their appearance and durability.
Storing and Protecting PLA Filament
Proper storage of PLA filament is crucial to prevent moisture absorption. It’s recommended to keep the filament dry and stored in a low humidity environment. Users have reported that even in moderately humid conditions, PLA filament can remain usable for several days, but extended exposure may lead to brittleness.
Cost Comparison: PLA vs. ABS
When assessing costs, PLA and ABS filaments are often comparably priced. However, the raw material cost of ABS tends to be lower. This price variability may play a role in selecting the appropriate filament based on budget and application needs.
Exploring Alternative Waterproof Filaments
For those who require waterproof capabilities, PET filament serves as an excellent choice. It combines the robustness comparable to ABS with the ease of use akin to PLA. Furthermore, PET is not only waterproof but also safe for food applications, making it versatile for various 3D printing projects.
Enhancing PLA Durability
If strengthening PLA prints is necessary, several methods can improve their performance. Among these are:
- Annealing: Post-printing, heating the PLA to a specific temperature can enhance its strength and stability.
- Choosing Specialized Brands: Consider using brands like Tough PLA, which are specifically designed to withstand higher temperatures and stresses.
- Design Adjustments: Modifying the geometry of the print can help prevent deformation and improve overall robustness.
FAQ
1. Can I use PLA for outdoor items?
PLA can be used for outdoor items, but it is not recommended due to its sensitivity to heat and moisture, which can lead to deformation over time.
2. What are signs that my PLA filament is no longer usable?
Signs of moisture absorption include brittleness, poor print quality, and extrusion issues during printing. Keeping an eye on these factors will help determine its usability.
3. Can I use PLA for functional parts that will see stress?
While PLA can handle low-stress applications well, it may not be suitable for functional parts that will be subjected to heavy loads. For such uses, consider materials specifically designed for strength and durability.
