The Purging Diaries

Here is where we share our knowledge, experiments, news and success stories.

Why do Colour Streaks Occur?

Why do Colour Streaks Occur?

Colour streaking can be divided into two categories. The first type is caused by material degradation, the second one is caused by pigments. Both types of streaks can appear spontaneously, even a long time after a colour change. We are going to refer fundamentally to...

Purging Compounds: Liquid vs Mechanical

Purging Compounds: Liquid vs Mechanical

The use of purging compounds has become incredibly useful when it comes to removing the carbon residues and colour stains; as well as reducing machine downtime, notably enhancing processing efficiency. Liquid purges have growth among the product segmentation market,...

Success Stories

Pet Preform Injection Molding Colour Change

Pet Preform Injection Molding Colour Change

Pet Preform Injection Molding Colour Change with EasyPurge Purging Compound Opaque White to Clear Goal: Scrap and cleaning cost reduction Summary: Machine: Husky Hypet 300 Extruder Diameter: 120 mm Mould: 48 x 44.0grs Material: PET Colour: Opaque White 10% T. Oxide ...

PA to HDPE

PA to HDPE

Extrusion Blow Molding Material Change with EasyPurge Purging Compound PA to HDPE Goal: Material change and Black Specks Removal Summary:  Machine: Moretti  Extruder Diameter: 100 mm Material: PA to HDPE Colour: Black to Clear Industry: Automotive Factory Location:...

POM BLACK to PA CLEAR

POM BLACK to PA CLEAR

Injection Molding Material Change with EasyPurge Purging Compound POM BLACK  → PA CLEAR Goal: Black Specks Removal Summary:  Machine: 400T  Material: POM Black to PA Clear Easypurge Purging compound consumed: 6 Sachets (120 Grs) Time: 15 Minutes Industry: Automotive...

HDPE BLACK to HDPE NATURAL

HDPE BLACK to HDPE NATURAL

Extrusion Blow Molding Colour Change with EasyPurge Purging Compound HDPE BLACK TO HDPE NATURAL Goal: Downtime reduction Summary:  Machine: Mateu & Sole (Spain)  Extruder Diameter: 120mm Material: HDPE Colour: Black to natural Normal results using virgin...