Glass-filled Polypropylene vs ASA

Compare Glass-filled Polypropylene and ASA filaments side-by-side so you can pick the right one for your 3D printing project.

Glass-filled Polypropylene vs ASA: Glass-filled Polypropylene is known for very tough, while ASA is known for excellent uv resistance (outdoors indefinitely). ASA is easier to print; Glass-filled Polypropylene is less moisture-sensitive; ASA prints at higher nozzle temperatures (220-275°C vs 230-260°C). Choose Glass-filled Polypropylene for very tough, or ASA for excellent uv resistance (outdoors indefinitely).

Key differences at a glance

Property
Glass-filled Polypropylene
ASA
Nozzle temp
230-260°C
220-275°C
Bed temp
80-100°C
90-110°C
Enclosure needed
Required
Recommended
Ease of printing
Difficult
Moderate
Moisture sensitivity
low
moderate

Glass-filled Polypropylene

B

GFPP / PP-GF

Very tough, durable, all-weather, extremely lightweight

ASA

A

Acrylonitrile Styrene Acrylate

Excellent UV resistance (outdoors indefinitely), tough, matte surface

Detailed Comparison

Property
Glass-filled Polypropylene
ASA
Tier Rating
Tier B
Tier A
Family
PP
ASA
Nozzle Temp
230-260°C
220-275°C
Bed Temp
80-100°C
90-110°C
Enclosure
required
recommended
Cooling
Low cooling
Low to moderate; avoid drafts
Moisture Sensitivity
low
moderate

Green marks the generally easier or more forgiving option in that row, based on tier, enclosure needs, and moisture sensitivity. It is not always the better choice for a specific job, so weigh it against what your project actually needs.

Strengths Comparison

Glass-filled Polypropylene Strengths

  • Very tough, durable, all-weather, extremely lightweight
  • Industrial-relevant material properties

ASA Strengths

  • Excellent UV resistance (outdoors indefinitely), tough, matte surface
  • Less warping than ABS; low viscosity enables very high speed printing
  • High heat tolerance (~boiling water range)

Considerations

Glass-filled Polypropylene Caveats

  • Even harder to print than PP; peels/curls more aggressively

ASA Caveats

  • Still off-gasses; enclosure/ventilation recommended
  • Can still warp; needs tuning

Frequently Asked Questions

What is the difference between Glass-filled Polypropylene and ASA?
Glass-filled Polypropylene prints at 230-260°C nozzle / 80-100°C bed (Required enclosure, low moisture sensitivity). ASA prints at 220-275°C nozzle / 90-110°C bed (Recommended enclosure, moderate moisture sensitivity).
Is Glass-filled Polypropylene or ASA stronger?
Our dataset does not include comparable tensile strength values for both. Qualitatively, Glass-filled Polypropylene is suited to very tough, while ASA is suited to excellent uv resistance (outdoors indefinitely).
Which prints at a higher temperature, Glass-filled Polypropylene or ASA?
ASA prints at a higher temperature (220-275°C nozzle vs 230-260°C for Glass-filled Polypropylene).
Is Glass-filled Polypropylene or ASA better for beginners?
Both are similarly approachable: Glass-filled Polypropylene (required enclosure, low moisture) and ASA (recommended enclosure, moderate moisture).
Should I use Glass-filled Polypropylene or ASA for outdoor use?
For outdoor use, ASA is usually the better fit (Excellent UV resistance (outdoors indefinitely)). Choose Glass-filled Polypropylene instead when very tough.

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