Polymer Modified Bitumen (SBS、APP)
Polymer Modified Bitumen waterproof membranes are composed of
reinforcing fabrics that serve as carriers for the hot
polymer-modified bitumen as it is manufactured into a roll
material. The kind roof systems typically are installed as a
two-ply system and almost always are fully adhered.
Surfacings for modified bitumen membranes include aggregate
surfacing, mineral surfacing, metal foil-laminate surfacing and
smooth liquid-applied surfacing.
Polymer modified bitumen or modified bitumen sheet membranes were
developed in Europe in the early 1960s and now have been widely in
use all over the world.
There are two types of modified bitumen waterproof membranes:
· Styrene-Butadiene-Styrene(SBS) polymer-modified bitumen membranes
commonly are installed in hot moppings of asphalt or cold adhesive.
SBS is a rubber-type modifier that gives bitumen the ability to
stretch and resist damage, and improves its cold-temperature
flexibility. Some SBS modified membranes are self adhering; that
is, they contain an adhesive backing.
· Atactic Polypropylene (APP) polymer-modified bitumen membranes
typically are heat-welded or torch-applied. APP is specially
suitable for high temperature and strong sunshine area.
Generally, APP modifiers impart a "plasticized" quality to asphalt,
and SBS modifiers impart a "rubberized" quality to asphalt.
KRS Modified Bitumen waterproof membranes are ideal choice for the
customer due to the following advantages.