TPU 90A Filament (1kg)

No, a top cover is not required.

No, it is not required. However, a 0.2 mm nozzle is not recommended for TPU 90A due to its high extrusion resistance and increased risk of clogging. A larger nozzle size ensures smoother extrusion, better flow stability, and more reliable printing performance.

Yes. TPU is highly hygroscopic and must be properly dried before use.
• Drying condition: 70°C for 6 hours
• Storage: Keep sealed in an airtight container with desiccant when not in use, and avoid direct sunlight or humid environments.
Proper drying is essential to prevent bubbles, stringing, and weak layer adhesion.

No. High-speed printing is not recommended due to its flexible nature.

(Based on a 0.4 mm nozzle; parameters may vary depending on nozzle size and printer configuration)

TPU 90A enables flexible and functional multi-material printing on the U1 when paired with compatible materials. Depending on your application, there are several recommended approaches:

• Flexible + Rigid Hybrid Structures (with Beam Interlocking)
Combine TPU 90A with compatible rigid materials (such as PETG or PET) to create functional parts with both flexibility and structural strength.
For material combinations with naturally weaker interlayer adhesion, enable Beam Interlocking in Snapmaker Orca (Use Beam Interlocking). This feature creates a mechanical interlocking structure at the material interface to improve bonding strength and overall part integrity.
Typical applications include:
  - Soft-touch grips and handles
  - Overmolded components
  - Hinges and articulated mechanisms
  - Shock-absorbing structures

• Use TPU as Part of Multi-Material Support Strategies
TPU can be printed alongside selected materials as part of a multi-material workflow without requiring the materials to bond together. This approach can be used to create support structures, simplify post-processing, or achieve specific surface finishes.

• Recommended combinations for TPU 90A:
  - Bondable with Beam Interlocking: TPU + PLA, TPU + PA, TPU + PETG, TPU + PET
  - Not recommended for structural bonding: TPU + ABS / ASA / PC (unless validated for specific use cases)

Note:
1) If the model adheres too strongly and is difficult to remove after printing, spray alcohol at the interface between the model and the bed during removal.
2) If first-layer adhesion fails, please check the bed levelling and clean the build plate. If the issue persists, apply a glue stick or liquid glue to improve adhesion.

TPU 90A is a flexible material that requires precise handling during loading and unloading. Due to its softness, improper operation may lead to feeding instability, stringing, or nozzle clogging. Manual loading and unloading is required, while automatic filament feeding is strictly prohibited, as it may caused feeding failures or extrusion issue.
To improve printing success rate, the following recommendations are strongly advised:
• Disable automatic filament feeding and use manual loading only
TPU may deform in automatic feeding systems, leading to unstable extrusion or jams. Manual feeding significantly improves reliability and print success rate.
Recommended operation guide: TPU Manual Loading Guide Video
• Avoid using a 0.2 mm nozzle
A 0.2 mm nozzle is not recommended for TPU 90A due to high extrusion resistance and increased risk of clogging. A larger nozzle size provides smoother extrusion, better flow stability, and higher print reliability.
• If stringing occurs:
Ensure the filament is fully dried before printing. If stringing persists, adjust retraction settings (increase retraction distance or speed), reduce travel speed, and optimize spacing between parts.
• If model deformation or collapse occurs:
Ensure the cooling fan is set to 100%. Improve cooling by optimizing model orientation toward the airflow and positioning the affected area closer to the fan for better localized cooling.