Polyethylene lifebuoy is used to release smoke distress signal for help when a ship is in distress. International convention for the safety of life at sea (SOLAS 74/96) 1996 amendment (LSA) imo resolution msc.81 (70).
Lifebuoy is resistant to high and low temperature without shrinkage, rupture, expansion and decomposition.
The lifebuoy shall not be cracked or broken after falling behind from the specified height.
The lifebuoy is oil resistant and free from shrinkage, rupture, expansion and decomposition.
Fire resistance of the lifebuoy shall not continue to melt after burning or burning.
The life buoy can support the 14.5kg iron block to float for 24 hours in fresh water. In the case of free suspension, the lifebuoy can bear 90kg weight for 30min without rupture and permanent deformation.
A life buoy equipped with a self-generating smoke signal and a quick-throw device attached to a self-lighting floating lamp can trigger the device when released.