Prestressed plastic bellows

– Prestressed plastic bellows made from HDPE and PP
– Mainly used in post-tensioned prestressed concrete structure bridges
– Features:
– Good sealing performance
– No bleeding
– High ring stiffness
– Small friction parameters
– Aging resistance
– Corrosion resistance
– Large bending capacity
– Not easily damaged by vibrator
– Facilitates vacuum grouting to improve bridge service life