PP/PE Injection and Extrusion Lightweighting

The supplied solution covers selected PP, PE and TPR/TPE moulded or extruded components, including non-load-bearing automotive parts, appliance housings/bases, crates, pallets, containers, daily-use goods and PE boards/profiles/pipes. The actual design and acceptance requirements determine suitability.

• Sink marks remaining despite increased holding pressure.
• Silver streaks, flow marks or rough surfaces after foaming.
• Coarse cells, merging or internal voids.
• Warpage, shrinkage or dimensional variation.
• Difficult powder metering, dust or uneven dispersion.
• Different results between equipment/moulds at the same dose.
• Extruded board streaks, unstable skin or thickness variation.

• PP/PE/TPR grade and melt-flow properties.
• Fillers, reinforcement and recycled material.
• Injection/extrusion actual temperature, screw speed, back pressure and residence time.
• Wall thickness, runner and gate.
• Current part weight, target saving and required appearance, dimensions and mechanical limits.

Early release may produce silver streaks, incomplete filling or poor surfaces; late release may leave insufficient reduction, residue or later deformation. Excess reduction may compromise impact strength and dimensional stability.

For extrusion, monitor die-region pressure, actual temperature, line speed, cooling, skin formation and melt strength. Fast release may break the surface and insufficient melt strength may collapse cells.

Pending confirmation The source lists TNC200/211/212/300/308 as candidates. Current availability, carrier and exact model parameters are not verified; no additional SKU detail is created from that list.

For sink compensation, the aim may be limited gas generation to offset volume shrinkage rather than a high expansion ratio. For lightweighting, state which surface, impact, assembly and dimensional properties must be retained alongside the weight target.

1. A · Baseline. Current compound, agent, dose and process, with the current result recorded.
2. B · Direct replacement. Change the candidate agent while holding other conditions steady.
3. C · Process optimisation. Evaluate permitted adjustments to actual temperature, time, speed, pressure and cooling.
4. D · Alternative. Compare a second candidate or a reviewed compound route.

For each group record model, batch, dose, mixing order, equipment settings, actual material temperature, pressure, speed, residence time, mould/die, cooling and sample time.

Include dose gradients and permitted adjustments to pressure, temperature, screw/line speed and cooling. Keep material, mould/die and sampling conditions traceable.

Pending confirmation No fixed weight-reduction percentage or unchanged-mechanics guarantee is supported. Actual trial data are required.

A successful small trial does not establish stable production performance. Recheck batches, actual equipment temperatures, mixing and feeding, speed, pressure, residence time, mould/die condition, cooling and ageing during the production trial.

Technical advice does not replace the customer’s formulation responsibility, production verification, finished-product testing or target-market requirements.

Trial and scale-up support · Document and test requirements · AC/NC route context

Share resin grade/MFI, filler content, equipment, actual material temperature, wall thickness, current weight, target saving, defects and mandatory mechanical limits.