3 ms·
Chances are it's poyurethane. Low-density polyethylene would have been the better choice for longevity, but not so much for shock-absorbtion.
by fuzzfactor 2y ago
Chances are it's poyurethane.
Low-density polyethylene would have been the better choice for longevity, but not so much for shock-absorbtion.
- userbinator 2y agoPU is definitely known for degrading like this over time. LDPE foam exists, but I think it wasn't common yet at that time.
- owenversteeg 2y agoWhy would you say PU rubber? ~30 years in an environment with some thermal cycling seems rather high for PU rubber.