Calender Thermal Bonding Systems
topic
Thermal calender bonding uses heated steel rolls with engraved point bond patterns pressing the web at 40 to 100 Newtons per millimetre nip pressure at temperatures below polymer melting point, creating discrete bond points at the calender pattern contact areas that provide tensile strength while leaving unbonded areas maintaining fabric softness and drape, with bond point density, geometry, and thermal bonding temperature governing the strength-softness balance.
Role
Provides the most productive thermal bonding method for spunbond and drylaid bicomponent nonwovens through high-speed continuous calender operation that simultaneously applies heat and pressure for rapid thermal bonding, with calender bonding being the primary method for high-volume hygiene spunbond production where the combination of pattern bond coverage and bonding speed determines both fabric mechanical performance and production economics.
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