Knowledge · Process & Formulation
Process & Formulation
What happens between the feed throat and the pelletizer: temperature profiles by material family, filler and masterbatch recipes, engineering plastics compounding, pelletizing choice, feeding accuracy and the kilograms you lose at start-up and grade change.
- Twin Screw Extruder Temperature Profile by Material: 16 Families, Zone by Zone
Zone 1, melt peak, metering and die ranges for sixteen material families — plus the eight ceilings that decide the profile before any setpoint is typed into the panel.
Process & formulation · 11 min read - Engineering Plastics Compounding: Glass-Filled PA, PC/ABS and PBT Lines
The highest-value single-machine application in compounding — and the easiest one to ruin. Side feeding, fibre-length protection and moisture control decide the mechanical properties long before barrel temperatures do.
Process & formulation · 8 min read - Filler Masterbatch Line: 85–90% CaCO₃ at 350–550 kg/h
Filler masterbatch is a cost-reduction product sold by the tonne, so the machine is judged on two numbers only: how much powder it can swallow, and whether the pellets still feed cleanly in the customer's line.
Process & formulation · 9 min read - Seven Pelletizing Methods Compared: Strand, Water Ring, Underwater, Hot Face
The pelletizer is chosen by the polymer, not by the budget. This table compares all seven methods we build on the criteria that actually decide the purchase: filler ceiling, water contact, pellet shape and fines.
Process & formulation · 8 min read - Why the Feeding System Sets the Throughput Ceiling
Sustained output equals the weakest feeder's stable rate, not the motor nameplate. Feeder accuracy by material, side-feed rules and the mass-balance arithmetic that sets feed rates.
Process & formulation · 8 min read - Start-up Scrap on a Twin Screw Line: Measure It, Then Cut It
Half of start-up scrap is the melt already in the barrel. Typical weights by machine size and L/D, four design levers, and the contract clause that makes it enforceable.
Process & formulation · 8 min read - PLA & biodegradable pelletizing: the 170-200°C window
Dry to 0.05%, mild screw, air-cooling cut - protect the molecules, not the rate.
7 min read - 80-90% CaCO₃ masterbatch: the line layout
Activate, weigh, twin-screw mix, vent, single-screw pump, cut - 350-600 kg/h.
8 min read - Black masterbatch: why 40% carbon black costs output
400-600 vs 500-750 kg/h on the same frame - dispersion eats capacity.
7 min read
FAQ
My formulation is not in these tables — what now?
Send 25–50 kg of polymer and additives. Every range on these pages is a measured reference, not a catalogue maximum; we replace the estimate with a measured number from a trial on your material.
Where does start-up scrap fit into process decisions?
Into the L/D decision and the pelletizing architecture. Both are fixed at order stage and set the floor for every start and grade change afterwards; the operating-cost page shows the arithmetic.
Other sections: Machines & Selection · Service & Operation · Extrusion lines by application · free line quotation