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What a purging compound is

Why purging ?

Reasons of purging

SOLVING QUALITY ISSUE

Solving quality issue during color & material changes

REMOVE CONTAMINATION

Via carbonization, unmelting..

PRODUCTION PLANNING

Production planning issues & substential time & cost to clean the screw
clean xpress purge compound screw

Types of contaminants

  • Black Specks (carbonized material) lodged in extruder & barrel dead zones.
  • Lines
  • Remaining Color Pigments lodged in dead zones
  • Carbonized materials in Die Head
  • Gels
  • Unmelted resins
  • « Fish Eyes » (in films – caused by black specks)
  • Resins or compound with metal affinity
  • Resins blocked inside the barrel

Why contaminants appear

  • Thermally-sensitive or Shear-sensitive materials / blends / compounds being degraded inside the extruder.
  • Materials & Compounds presenting metal affinity and remaining stuck.
  • Design and Ageing of the machinery – impacting the presence of dead zones in the barrel / die-head.
  • Ageing and design of the screw – a deteriorated screw will create more risk to get contaminants.
  • Frequent changes of RPM.
  • Unusual pressure variation.

When purging ?

BETWEEN 2 PRODUCTION BATCHES

Color or material change

DISMANTLING OPERATION

Shutdown and startup
purging compound clean screw

A purging compound is a plastic resin compound designed to clean all primary plastic machinery (injection molding machines, blow molding machines, extruders) when changing color, resin or simply to remove black specks or contaminations.

Contact us to know more.

Existing purging solutions

LIQUID

EFFICIENCY

PRODUCTIVITY

MANUAL CLEANING

EFFICIENCY

PRODUCTIVITY

VIRGIN RESIN

EFFICIENCY

PRODUCTIVITY

CHEMICHAL CLEANING

EFFICIENCY

PRODUCTIVITY

Chemical cleaning is a surfactant effect for the barrel dead zones but requiring a long soaking time.

MECHANICAL CLEANING

EFFICIENCY

PRODUCTIVITY

Mechanical cleaning ansure an efficient scratching effect but very abrasive (glass fibers are oftenly used).

With Clean Xpress

Clean Xpress

EFFICIENCY

PRODUCTIVITY

With Clean Xpress solution we ansure you an Hybrid Cleaning Effect Mechanical (no abrasion) & Chemical strengths, Material affinity Carrier selection we adapt the Clean Xpress grade to clean your resin, Polytechs knowledge & experience we understand & adapt the purging step to your process.

IT'S TIME TO DISCOVER NOW THE PURGING CAPABILITIES OF CLEAN XPRESS

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