PVC

In the vinyl polymer filament or profile family, PVC is specified, supplied as rigid board or profile, flexible filament or wiping profile and molded holder component, drawn in round, rectangular and hollow sections and set in straight rows, helical, staggered, zoned and wavy fill patterns.

PVC is used in custom cleaning brushes for wet sealing, light wiping and corrosion-resistant strip or board backing where load, heat and solvent exposure are moderate.

It is usually weighed against Polypropylene PP, TPEE Elastomer Filament and Aluminum Holder, and the deciding difference is moisture uptake and working temperature rather than anything you can read off the name.

Compare PVC with PE board, PP, elastomer, aluminum holder. Change material when wet stiffness, temperature, chemical resistance, conductivity, particle shedding, or surface marking becomes the limiting factor.

PVC is available as rigid board, semi-rigid profile and flexible wiping element can all be PVC formulations; PVC 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.

PVC takes up 0.04–0.40% (24h, ISO 62/ASTM D570).

Low water absorption; rigid and flexible PVC profiles remain suitable for wet cleaning and strip-brush backing.

What this means for your application: moisture uptake is low enough to ignore in service, which is why this grade holds its stiffness through washdown.

A practical check: run one wet cycle and compare tip contact against the dry state. If the wet brush leaves residue behind or no longer reaches the bottom of the bore, change the material rather than the geometry.

Maximum working temperature is about 60°C in industrial-brush reference tables; confirm the exact PVC grade for heated or chemical service.

The filament tables quote 50–70°C continuous and 75–90°C peak. The tighter number above is the one to build to, because a brush is loaded while it is hot.

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 TPEE Elastomer Filament or Polypropylene PP, which hold a higher continuous temperature.

Diameter, trim length and applied load all shift the real limit, so a thin filament touching lightly survives conditions that would flatten a thick one under pressure.

It stands up to water, dilute acids and alkalis.

Compatibility is a function of concentration, temperature and contact time together. A short rinse in a dilute solution is a different exposure from an overnight soak in a concentrated one, even with the same chemical on the label.

Before you commit to a quantity: Specify the exact PVC 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.

The floor is roughly 0.08 mm; finer than that and the filament snaps rather than flexes. In practice you are choosing inside 0.08–2.00 mm.

Free trim runs 5–250 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 0.08–0.56 mm for light wiping, dusting and surfaces that mark easily, and 0.56–2.00 mm where residue is packed on and point pressure matters more than surface risk.

Tip treatments available on this filament: end rounding, anti-static coating, antibacterial coating and flame-retardant formulation.

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.

Wet sealing, light wiping and corrosion-resistant strip or board backing where load, heat and solvent exposure are moderate.

Where it turns up in practice:

• Dust Removal
• Industrial Machine Cleaning
• Brick, Tile & Building Material Machine Brush Use
• Mold Cavity Cleaning
• Printer & Scanner Cleaning
• Connector & Slot Cleaning

It is normally set into these constructions:

• Custom Strip Seal Brushes
• Custom Machine Table Brush Plates
• Custom Handheld Detail Brushes
• Custom Wheel Brushes
• Custom Roller and Conveyor Brushes
• Custom Polishing Buffing Wheels

The trade-off: Plasticizer migration or extraction, thermal degradation, low-temperature behavior and screw retention can limit flexible or board PVC.

Send the brush type, filament diameter, free trim length, density, contact setting, wet or dry duty, working temperature and the actual cleaning chemistry together. Any one of them on its own leaves the stiffness undefined.

What usually goes wrong at this step:

• Selecting PVC 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; ISO 139; ISO 5079; ISO 20743.

Source: Westlake — PVC and PS resin property summary. The figure quoted here is a working temperature for a plasticised brush profile, not a melting point. Confirm the exact PVC compound if the brush runs warm or sits in solvent.