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Cling agent

Polysiobutylene

CLING AGENT

PIB is the acronym of Polyisobutylen, an organic polymer prepared by polymerization of isobutene. Polyisobutylen (or PIB) is a viscous polymer and is incompatible with PE. Polyisobutylen (or PIB) will therefore migrate to the surface over time of the film and thus will give a cling effect.
PIB graphic

T0

LLDPE RESIN

cling masterbatch

T+3 days

LLDPE RESIN

cling masterbatch

T+28 days

LLDPE RESIN

Cling masterbatch

Cling development is affected by

  • Density of the resin (PE<0.923 recommended)
  • Crystallization level
  • Presence of additives (antiblock fillers or slip agents)
  • Storage temperature of film rolls

Effects

PW delivers differents effects to be adapted for all production methods and final application, and all grades presents balance in different strengths into peel strength, lap strength, noise and retach.

Two main cling effects

PW

PEEL

High peel cling will prevent unwrapping of the film
by friction.

PW

LAP

High lap cling will ensure good interlayer cohesion to the benefit of the holding force and airtight.

Two secondary cling effects

PW

RETACK

High retack will allow to wrap – unwrap and wrap again with good cling effect.

PW

NOISE

Related to cling.

PW mechanism & properties
technical support &
Technical document

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  • Mechanism
  • Poperties
  • Cling agent
  • Cling  development
  • Effects
  • Side benefits

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