KNOW-HOW - EXTRUSION

Extrusion

How ‘Hydro Wedges’ Reduce Screw Wear

Using them only in the melting section provides for greater design freedom and negates the impact these devices can have on output and melt temperature.
#bestpractices #screws

Additives

Extruding with Fillers

You can use the reference point from processing unfilled polymer to determine whether you can run filled resin on your current system.
#bestpractices #processingtips

Extrusion Know How

Don’t Build In Melt-Temperature Variations

It’s not unusual for polymer to exit the extruder with a uniform melt temperature, only to be fouled up by downstream flow pipes and the like. Here’s how to avoid this.
#bestpractices #processingtips

Film Extrusion

How to Collect & Interpret Process Data in Extrusion

The first installment of this three-part series focuses on proper use of a data- acquisition system.
#bestpractices #processingtips

Film Extrusion

How to Collect & Interpret Process Data in Extrusion: Part 1

The first installment of this three-part series focuses on proper use of a data- acquisition system.

Extrusion Know How

Which Barrier Screw for You?

It depends ... mostly on the melting requirements of the polymer.
#bestpractices #processingtips #screws

Extrusion Know How

What Output Can I Expect?

Processors ask screw designers this question a lot. But neither output nor melt temperature can be predicted without details on the polymer and head pressure.
#bestpractices #processingtips #screws

Film Extrusion

Extruding Very High-Flow Polymers

Screw designs not suited to process lower-viscosity materials will result in poor melt quality and lower outputs.
#bestpractices #processingtips

Extrusion Know How

Do You Have Screw Wear?

It’s generally caused by metal-to-metal contact, and your first indicator will be poor melt quality.
#bestpractices #screws

Pipe, Profile & Tubing Extrusion

EXTRUSION: Is Head Pressure Sapping Your Extruder’s Strength?

A redesign of all of the flow paths between the end of the barrel and die may be in order.
#bestpractices #dies