PE Polyethylene

PE Polyethylene is used two ways in a brush: as LDPE or HDPE monofilament fill, and as board, block or moulded stock for the holder itself. It is chosen for chemical resistance and low cost rather than for stiffness.

PE Polyethylene is used in custom cleaning brushes for gentle wet wiping, light sweeping, product guiding and corrosion-resistant brush backing at modest load and heat.

It is usually weighed against Polypropylene PP, PBT and PVC, and the deciding difference is moisture uptake and working temperature rather than anything you can read off the name.

Compare PE Polyethylene with PP, PBT, PVC, PA12. Change material when wet stiffness, temperature, chemical resistance, conductivity, particle shedding, or surface marking becomes the limiting factor.

PE Polyethylene is LDPE is more flexible, while HDPE is the stiffest common PE family; final bristle stiffness also changes strongly with diameter and free trim, which is why PE Polyethylene changes brush stiffness through filament diameter, free trim, density, crimp, and contact. Use finer filament and longer trim for conformable contact; use coarser filament, shorter trim, or higher density for stronger displacement or cutting.

Filament-level figures for this grade and the ones it is usually compared to. A finished brush behaves differently again.

The part people get wrong: the same grade can feel soft or aggressive depending on diameter, trim and density. Specify that geometry before the material, or the sample will surprise you.

PE Polyethylene takes up below 0.01%.

Very low water absorption and strong wet stiffness.

What this means for your application: it barely absorbs water, so dry and wet contact pressure are effectively the same and the brush behaves alike on both duties.

A practical check: soak a sample for an hour and re-measure the trim. If it has moved enough to change the contact band, the grade is wrong for the duty.

Grade-dependent. Industrial brush suppliers publish maximum operating guidance around 80–120°C for PE filament. Confirm the exact PE grade before sustained hot service.

Design to that answer rather than to a raw-material datasheet figure: a brush rating already accounts for filament working under load rather than raw polymer sitting in an oven.

Published melting point is 105–135°C. That is a material property, not an operating ceiling, and using it to justify a hot wash is the fastest way to ruin a brush.

Where it stops working: validate with a sample if the process sits near the top of that band. If the filament takes a permanent set under load, step up to PBT or Polypropylene PP, which hold a higher continuous temperature.

The usable limit also moves with diameter, trim and contact pressure. A fine filament under light load tolerates more than a thick one under heavy scrubbing.

What degrades it: strong oxidizers and hot aromatic solvents.

The same cleaner can be harmless or destructive depending on how strong it is, how hot it runs and how long it sits. Quote the concentration and the dwell time, not just the product name.

Before you commit to a quantity: Specify the exact PE Polyethylene grade or alloy, filament or profile size, color, straight or crimped form, working temperature, wet or dry use, chemical exposure, surface finish, and any required material documentation.

About 0.20 mm. Below that the filament turns fragile and breaks under ordinary contact pressure, so 0.20–2.00 mm is the working range.

Free trim runs 3–300 mm, and the two interact: a finer filament needs a shorter trim to keep useful stiffness, while a thicker one carries a longer trim and still lands pressure on the tip.

Split the range by duty: roughly 0.20–0.65 mm for light wiping, dusting and surfaces that mark easily, and 0.65–2.00 mm where residue is packed on and point pressure matters more than surface risk.

Tip treatments available on this filament: end rounding, tapered-tip grinding, silicone-oil coating, anti-static coating and antibacterial coating.

In practical brush terms: reaching deep into a bore or crevice is a diameter problem before it is a length problem. A thicker filament on a moderate trim pushes further in before the tips fold over.

Gentle wet wiping, light sweeping, product guiding and corrosion-resistant brush backing at modest load and heat.

Where it turns up in practice:

• Laboratory Tube Cleaning
• Household Dish, Teapot & Kitchen Detail Cleaning
• Carpet Machine Cleaning
• Beverage Equipment Cleaning
• Industrial Machine Cleaning
• Bakery Tray Cleaning

It is normally set into these constructions:

• Custom Handheld Detail Brushes
• Custom Tube & Pipe Bore Brushes
• Custom Roller and Conveyor Brushes
• Custom Floor Scrubber Sweeper Brushes
• Custom Strip Seal Brushes

If the sample comes back rejected: Creep, low heat margin, limited cutting action and stress cracking can rule out PE for high-load cores, hot processes or aggressive chemical contact.

A usable specification carries the construction, the filament diameter and free trim, the density and contact setting, and the service conditions: wet or dry, temperature, and what the cleaner actually is.

The mistakes that most often send a sample back:

• Selecting PE Polyethylene from the material name alone without setting filament diameter, trim length, and density
• Using dry stiffness to predict wet behavior without checking moisture absorption or liquid exposure
• Ignoring trapped abrasive particles, chemical concentration, temperature, or contact motion when assessing surface risk

Reference standards behind the figures on this page: ISO 527-1:2019; ASTM D638; ISO 62:2008; ASTM D570-22; ISO 868:2003; ASTM D2240-15(2021); ISO 4892-3:2024; ASTM G154-23; UL 94.

Source: LyondellBasell — Polyolefin polymer portfolio. Polyethylene grade and filament draw ratio move the usable limit more than the polymer name does; softening starts well below the melting point, and a filament under bending load reaches it sooner than a moulded part.