eSUN ePLA-ST (Super Tough PLA) is an engineering-grade PLA filament characterized by its higher strength than PETG, impact resistance of up to 30.73 kJ/m², and elongation at break of up to 24%. It is suitable for mechanical, automotive, and electronic parts. It prints easily at 200-230°C without warping.

What is eSUN ePLA-ST?

eSUN ePLA-ST, or Super Tough PLA, is an engineering-grade PLA filament designed for applications requiring exceptional strength and durability. The "ST" in its name clearly indicates the material's primary characteristic: "Super Tough."

eSUN ePLA-ST is categorized within eSUN's Engineering Materials group, alongside PA (Nylon), PA-CF, and ASA. This signifies that it is engineered for serious applications, not just decorative models.

Key Features that Distinguish ePLA-ST from Standard PLA

1. Higher Impact Resistance than PETG

eSUN ePLA-ST boasts an IZOD Impact Strength of up to 30.73 kJ/m², which is significantly higher than general PETG. This is why eSUN states that ePLA-ST is notably tougher and more durable than PETG.

2. Excellent Elongation at Break

An Elongation at Break of 24.05% means that printed parts can stretch considerably before breaking, making them much more resistant to tensile and compressive forces than ordinary PLA and PLA+.

3. High Layer Adhesion

High bonding strength ensures that printed layers adhere tightly and strongly, reducing the chance of parts delaminating when subjected to forces from various directions.

4. High Printing Accuracy

With a Melt Flow Index of 3.2 (190°C/2.16kg), it produces detailed and accurate prints, avoids clogging, and provides a beautiful surface finish.

eSUN ePLA-ST Printing Parameters

Parameter	Recommended Value
Extruder Temperature	200 – 230°C
Bed Temperature	45 – 60°C
Printing Speed	< 200 mm/s
Fan Speed	100%
Heated Bed Required	Yes

Note: For long-distance printing (Bowden extruder), it is recommended to reduce the speed to ≤40 mm/s to prevent feeding issues.

Mechanical Properties of eSUN ePLA-ST

Property	Value
Tensile Strength (XY)	38.4 MPa
Elongation at Break (XY)	24.05%
Flexural Strength (XY)	59.9 MPa
IZOD Impact Strength (XY)	30.73 kJ/m²
Heat Distortion Temp (0.45MPa)	52°C
Density	1.25 g/cm³

Suitable for Which Applications?

eSUN ePLA-ST is designed for:

• Mechanical Engineering — Parts that need to withstand impact or tension, such as brackets, hinges, clips, gears.
• Automotive Industry — Interior car parts, peripheral devices that need to withstand vibrations.
• Electronics — Durable cases for electronic devices, protective enclosures.
• Functional Prototypes — Parts that require real-world testing before mass production.

Comparing ePLA-ST with PLA+ and PETG

Material	Hardness	Toughness	Ease of Printing
PLA+	Good	Medium	Very Easy
PETG	Good	Good	Medium
ePLA-ST	Very Good	Better than PETG	Good

ePLA-ST therefore offers a balanced choice between easy-to-print PLA+ and advanced engineering materials that require an enclosed printer. It is ideal for those who need parts stronger than PETG but still desire the ease of printing of PLA.

Available Colors

eSUN ePLA-ST is available in 3 colors: Black, Grey, and White, in a diameter of 1.75 mm and a weight of 1 kg/spool.

Conclusion: Why Choose eSUN ePLA-ST?

If you are looking for a PLA filament that:

• Is stronger and more durable than PETG
• Can be printed without an enclosure
• Does not warp, even for large models
• Is compatible with most 3D printers, such as Bambu Lab, Creality, Prusa

eSUN ePLA-ST is the answer you're looking for. With a printing temperature of 200-230°C and a heated bed at 45-60°C, it is easy to use on common printers but delivers excellent results for real engineering applications.

Learn more about eSUN ePLA-ST on the official eSUN website

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