12/12/2025
Since launching PBSpan (TPEE), the most common question we receive isn’t about performance — it’s about recyclability.
After Shinkong introduced PBSpan, our polyester-based elastic fiber (TPEE), discussions with brands, mills, and downstream partners quickly converged on one technical question:
👉 Can PBSpan realistically enter a Textile-to-Textile (T2T) recycling system in the future?
This question cannot be answered with marketing language.
It must be answered at the material-structure level.
From a structural standpoint, PBSpan clearly sits on the “recyclable side.”
PBSpan is a TPEE (Thermoplastic Polyester Elastomer) with the following composition:
TPA + BDO + PTMEG
This means it is a depolymerizable, polyester-based elastic material, fundamentally different from PU-based spandex.
If a material can be depolymerized, separated, and re-polymerized, recyclability becomes a matter of scale and timing—not feasibility.
👉What is already technically established today
Mechanical recycling is feasible
PBSpan is compatible with PET/PBT systems and does not cause carbonization or equipment blockage typical of PU elastomers.
It fits naturally into mono-material garment strategies.
Chemical recycling of the hard segment is established
TPA and BDO can be recovered via existing polyester depolymerization routes, and this pathway already applies to post-consumer waste.
This means PBSpan already belongs inside the recycling system—not outside of it.
👉What about the soft segment (PTMEG)?
PTMEG is often assumed to be “non-recyclable,” but that assumption is incorrect.
After depolymerization, PTMEG coexists with other recovered components and can, in principle, be separated based on boiling point differences via fractional distillation.
The reason PTMEG is not recovered today is economics, not chemistry:
Current volumes are too small
Recovery infrastructure is not yet justified
👉Why future recovery is not a question of “if,” but “when”
Material industries follow a consistent pattern:
Demand for mono-material systems continues to increase
Elastic fibers must move away from PU structures
Adoption of TPEE will scale accordingly
Once sufficient volume exists:
Recyclers will store depolymerized PTMEG
Accumulate it to economic scale
Recover it through fractional distillation
Reintroduce it into material applications
This is not speculation—it is how every recyclable material has evolved.
👉Engineering conclusion
PU-based spandex: structurally blocks circularity
TPEE (PBSpan): structurally enables it
The recyclability of PBSpan is not a question of belief.
It is the outcome of material structure and industrial scale.
👉The real question is not whether PBSpan will be recyclable — but when full circularity will be realized.
