Blog
PolyTakt™ Blog is a curated industry journal with practical, evidence-led articles from educators, technicians, and process professionals — organised by topic so you can find what matters to your role.
Process development
A process window is the range where the part is still acceptable, and it is unfinished until you also record where production will run inside it. This article covers which settings the earlier studies already fixed, how to map second-stage pressure, cooling time, and the temperature the material uses, and how to choose a working point without defaulting to the middle of the range.
By PolyTakt Team · 21/10/2026
Process development
V/P transfer is where fill ends and pack begins. A first stage of 95–98% by volume is widely taught, and it does not always mean the same appearance. This article sets out both readings, how to see them on fill-only shots, and how to document the job you have given pack.
By PolyTakt Team · 7/10/2026
Process development
A gate seal study (also called a gate freeze study) finds when shot weight stabilises — when the gate has sealed and further second-stage time adds nothing. This article covers the default single-phase Hold Time method, an optional dual-phase Pack and Hold protocol for thick-walled parts, gate-type considerations, what to do when weight never plateaus, and how results support production and validated moulding.
By PolyTakt Team · 23/9/2026
Process development
If the pellets are wet — or over-baked — the process window on the press is fiction. This article treats drying as four fundamentals (temperature, dew point, airflow, time), explains why −40 °C is a useful floor rather than a law, and contrasts PBT heat history with PET/PC hydrolysis — including when vacuum drying and setback actually help.
By PolyTakt Team · 9/9/2026
Process development
A viscosity study shows how fill behaviour changes with injection speed at fixed temperature — and where the process is most stable. This article covers prerequisites, fixed vs adjusted transfer when fill advances with speed, step-by-step execution, curve interpretation, common mistakes, and when to repeat the study in production and medical moulding.
By PolyTakt Team · 26/8/2026
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