As 3D printing is getting more important in modern manufacturing, elements associated with it are attracting more attention as well.
This article examines a topic that is frequently disregarded but crucial to additive manufacturing: the adhesive used to keep components together.
Importance of Using Glues in 3D Printing
Glue, as an adhesive substance, plays a crucial role in the printing process by holding together different layers of material as they are being deposited.
Without the proper application of glue, the final product may not adhere properly and could fall apart.
In addition, glue helps to reinforce the structure of the printed object, making it more durable and long-lasting.
It also ensures that the layers are securely bonded together, creating a strong and stable final product.
Which Is The Best Glue?
I believe you must be puzzled about how many different types and categories of glues and used in additive manufacturing. By this pat, I’ll list several common choices and their properties.
Super Glue
Cyanoacrylate, commonly known as Super Glue, is a powerful adhesive that is known for its quick bonding abilities. It is a type of acrylic resin that becomes incredibly strong when it comes in contact with moisture, particularly in the form of water vapor.
The reaction that takes place when cyanoacrylate is exposed to moisture creates strong and stable bonds between surfaces, making it a popular choice for quick repairs and DIY projects.
Its key advantage is its fast drying time and allowing for quick fixes and applications. Besides, its adhesion is extremely strong and trustworthy.
However, it is important to note that cyanoacrylate can be difficult to remove if it comes in contact with skin or unwanted surfaces.
Epoxy
When working with 3D-printed parts, it is common to use epoxy as a bonding agent to join multiple pieces together.
Epoxy is known for its strong adhesive properties, making it ideal for creating durable and long-lasting connections between different components.
Whether it’s for repairing broken prints or assembling intricate structures, utilizing epoxy as a bonding agent in 3D printing has proven to be a practical and effective solution.
Polyurethane
Polyurethane is known for its solid bond capabilities and quick drying time, making it ideal for use in assembling 3D-printed objects.
It is also flexible allowing the glue for some degree of movement between the bonded parts.
Additionally, this material is resistant to water and heat, making it a reliable option for 3D printing projects that may be exposed to varying environmental conditions.
Polyvinyl Acetate
Polyvinyl Acetate is a water-soluble adhesive that is often used to provide a strong bond between the 3D print bed and the first layer of the print.
Additionally, PVA glue is easy to apply and clean up, making it a popular choice among 3D printing enthusiasts.
Glue Stick
Applying the glue stick can help with adhesion to the build platform, especially when printing with certain materials like ABS or nylon.
But we need to keep in mind that overuse of glue sticks can cause issues with the print quality or make it difficult to remove the finished print from the build plate.
Gorilla Glue
This is a popular choice for 3D printing enthusiasts due to its strength and versatility. Whether working on a small-scale project or a larger design, you’ll want a bottle of Gorilla on hand.
When it comes to assembling 3D-printed parts, having a reliable adhesive is crucial to ensure the structural integrity of the final product.
This is where Gorilla Glue shines, as it can bond a variety of materials commonly used in 3D printing, such as polylactic acid(PLA), ABS, PETG, plastic, and metal.
| Glue Type | Properties | Suited Application |
| Super |
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| Epoxy |
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| Polyurethane |
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| PVA |
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| Glue Stick |
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| Gorilla |
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Other Glues
There are other choices for the printing process:
Elmer’s glue: Commonly found in households.
It worked very well in adhering parts. However, it is important to note that this glue may not be as strong or effective as specialized 3D printing adhesives.
Purple glue stick: Often used for binding tasks.
This is a type of liquid glue that can be used to secure parts in place during the process. However, like Elmer’s, purple’s strength is not very good.
White glue: Can also adhere pieces together. White glue is easily accessible and can provide a temporary bond for 3D print objects.
Tape: Tape is used as a quick fix to hold parts together while waiting for a more permanent adhesive to be applied.
How to Use Glue In a 3D Printer?
In this part, I’ll guide you to understand how glues are applied in different 3D printing methods.
In Fused Filament Fabrication (FFF)
For FFF, glue is often used as an adhesive to bond layers of filament together during the process.
This can help improve the strength and durability of the final printed object, especially with materials that may tend to warp or delaminate without proper adhesion.
The glue acts as a binding agent, ensuring that each layer sticks together properly to create a cohesive and solid structure.
Additionally, glue can also be used to fill in gaps or imperfections in the print, providing a smoother surface finish.
In Selective Laser Sintering (SLS)
Glue is not commonly used in the SLS process. Instead, a laser is used to selectively sinter powdered material together to create the desired object.
This method is ideal for creating intricate and complex designs with a high level of detail and precision without the need for additional adhesives.
In Digital light processing (DLP)
In DLP, glue is sometimes used as a post-processing step to improve the overall quality and strength of the printed object.
By applying a thin layer of glue to the surface of the print and curing it with ultraviolet light, the final object can have a smoother finish and increased durability.
Glue can also be used to reinforce weak spots or areas that may be prone to breaking, enhancing the overall structural integrity of the 3D-printed object.
| Glue’s Apply Method | Specific Use |
| In FFF |
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| In SLS |
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| In DLP |
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Considerations when Choosing a Glue
When choosing a glue for 3D printing, there are several important considerations to keep in mind.
In this part, I’ll explain several key factors for manufacturers to think about and judge.
Compatibility with Printing Materials
One of the key factors to consider is the compatibility with printing materials.
Different types of 3D printing materials may require different types of adhesives to ensure a strong bond.
It is important to choose a glue that is specifically designed to work with the materials you are using in your printing projects.
Strength and Durability
The strength and durability of the glue are crucial factors to consider. A high-quality adhesive will not only provide a secure hold but withstand the test of time, increasing the lifespan of the printed object.
Additionally, A good adhesive will help smooth out imperfections and create a seamless finish, enhancing the overall appearance of the 3D-printed item.
Drying Time and Curing Process
The drying time refers to how quickly the glue sets after application, which can impact the efficiency of the process. Some glues dries clear in a quick time, while others may require more time to set properly.
On the other hand, the curing process involves the chemical reaction that occurs after the glue has dried to fully bond the materials together.
Environmental Issues and Safety Precautions
Some would regard toxicity as the top consideration in choosing glue. Some adhesives emit harmful fumes that can be dangerous if inhaled(Acetone, for example).
It is essential to opt for non-toxic options to ensure the safety of the user and the environment.
Safety precautions should also be taken into account. It’s important to read the instructions carefully and use the adhesive in a well-ventilated area.
Conclusion
To sum up, choosing the right glue for 3D printing is crucial in ensuring successful prints. There are many considerations based on the manufacturer’s needs.
Different types of glues work better with specific filament materials. Finding the right glue can save you time, money, and frustration in the long run.
There are many different types of glues used in 3D printing. Each has its strengths and weaknesses, so it is essential to test them out on a small scale before committing to a larger print.
Where Can I Get Great 3D Printed Parts?
You can fully trust XMAKE. As a leading digital manufacturing platform, we serve excellent 3D printing services and provide high-quality products. You can even make customization by offering the size, technique, shape, and color match you need.
FAQS
Q1: Can I use solvent-based adhesives like acetone for bed adhesion in 3D printing?
A: It is not recommended to use solvent-based adhesives like acetone for 3D print-bed adhesion as they can damage the build surface or the printed material.
Q2: Is it necessary to sand the build plate before applying glue for 3D printing?
A: Sanding the build plate before applying glue can help create a rougher surface for better adhesion, but it is not always necessary depending on the material you’re printing with.
Q3: How do I clean the build plate after the print is finished?
A: You can clean the build plate by using soap and water to remove any residual glue after the print is finished. This will help maintain the build surface for future prints.
Q4: Can I use painter’s tape with glue as an alternative for bed adhesion in 3D printing?
A: Yes, painter’s tape with glue applied to it is a suitable alternative for bed adhesion. It provides a removable surface for easy print removal.
Q5: How do adhesives work in 3D printing?
A: Adhesives such as glue sticks or tapes create a temporary bond between the printed object and the print bed, ensuring stability during the process.
References
- What is the best adhesive to stick 3D printing material PLA with? (n.d.). https://www.glueforce.com.cn/detail/512.html
- Beet 3d. (2024, May 22). Glue Guide: What Glue Sticks to What | Beetroots 3D – 3D Printer & 3D Printing Supplies Store. Beet 3D – 3D Printers, 3D Printing Materials, and Creative Education Services. https://beets3d.cn/glue-guide.html
