What are some characteristics of thermoplastics used in FDM?

In the context of Fused Deposition Modeling (FDM), thermoplastics are selected for their specific characteristics that contribute to the quality and durability of the printed parts. The assertion that these materials are stable with no warpage or shrinkage is particularly relevant. Thermoplastics, such as ABS and PLA, are designed to maintain their shape during and after the printing process, which is crucial for ensuring dimensional accuracy and consistency in the final prints.

When subjected to heat during the extrusion process, thermoplastics become pliable, allowing them to be molded into the desired shapes. However, they should ideally exhibit minimal deformation once cooled, and effective thermal management during printing can further enhance stability. This stability helps reduce the risk of defects related to warping or shrinking, ensuring that the printed part retains its intended dimensions and integrity throughout the manufacturing and cooling processes.

In contrast, the other characteristics mentioned do not accurately reflect the preferred traits of thermoplastics in FDM. High fragility and moisture absorption would hinder the usability of the material for practical applications, while better dimensional stability at high temperatures and flexibility under heat do not encapsulate the primary advantages sought in FDM thermoplastics.