Metocene

Metocene is a metallocene-catalysed polypropylene family. Single-site metallocene catalysts deliver narrow molecular weight distribution, tighter property control and ultra-high melt flow rates directly in the reactor, without peroxide cracking. Genesis Polymers distributes three Metocene grades covering thin-wall injection moulding, high-flow compounding and meltblown nonwoven fibre production.

The metallocene value proposition comes down to three points:

• Narrow MWD gives lower warpage and tighter dimensional control

• Reactor-produced high flow eliminates peroxide visbreaking, cutting the low-molecular-weight oligomers and volatile decomposition products that cracked PP carries, which lowers VOCs and improves organoleptic performance in food-contact and meltblown applications

• Single-site catalysis enables finer fibre formation in meltblown lines than any Ziegler-Natta grade can deliver

Where Metocene is used

• Thin-wall injection moulding: food packaging cups, lids and closures; cosmetics; personal-care containers

• Automotive and rigid packaging compounding: polymer modifier for polyolefin compounds

• Meltblown nonwovens: filtration media, wipes, hygiene products, masterbatch carriers

The Metocene grade range

Metocene HM648T is the thin-wall packaging grade. MFR 60 g/10 min, nucleated, with antistatic additivation, tensile modulus around 1640 MPa. Designed for high-speed thin-wall injection moulding of food packaging: cups, lids, closures, cosmetics and personal-care containers, where transparency, low odour, low warpage and stable dimensions all have to hold.

Metocene HM650V is the high-flow moulding and compounding grade. MFR 150 g/10 min. Combines very high flowability with good stiffness and low warpage, suitable for complex automotive mouldings, rigid packaging and polymer compounding. Also used as a polymer modifier where high flow and low odour are needed.

Metocene MF650Y is the meltblown grade. MFR 1800 g/10 min, supplied in flake form, with a very narrow molecular weight distribution. Designed for melt-blown fibre processes: filtration media, wipes, hygiene nonwovens, masterbatch carriers. The flake supply form and reactor-produced ultra-high flow support peroxide-free meltblown lines where fibre fineness is the primary target.

Why Metocene instead of Ziegler-Natta PP

Frequently asked questions about Metocene

What is Metocene used for? Metocene is used in three application areas: high-speed thin-wall injection moulding of food packaging (HM648T), high-flow compounding and complex automotive mouldings (HM650V), and meltblown nonwoven fibre production for filtration, wipes and hygiene products (MF650Y).

What's the difference between metallocene PP and Ziegler-Natta PP?

• Metallocene PP: single-site catalysts, narrow molecular weight distribution, tighter dimensional control, lower warpage, finer meltblown fibres

• Ziegler-Natta PP: multi-site catalysts, broader MWD, stronger shear-thinning, wider processing windows, lower cost

Which Metocene grade has the highest MFR?Metocene MF650Y, at MFR 1800 g/10 min, is the highest-flow Metocene grade. It is supplied in flake form and designed for peroxide-free meltblown nonwoven fibre production.

Does Metocene require peroxide visbreaking? No. Metocene's ultra-high MFR grades are produced directly in the reactor through metallocene catalysis. No peroxide degradation step is required, which eliminates the VOC and odour carry-over that peroxide-cracked PP brings into food-contact and meltblown applications.

When should I use Metocene instead of standard Moplen PP? Use Metocene when organoleptic quality, transparency, dimensional control or meltblown fibre fineness are priority selection criteria. For general-purpose thin-wall moulding without the metallocene premium, Moplen HP and EP grades are the mainstream choice.

Sister polypropylene brands from Genesis Polymers

For mainstream homopolymer, random and impact copolymer PP across the full MFR spectrum, see Moplen. For high-crystallinity PP with automotive-grade stiffness and heat resistance, see Adstif. For reactor-TPO impact copolymers for automotive bumpers and dashboards, see Hifax. For healthcare-grade PP, see Purell.