Technical Insight
Antimony-Free 1064 nm Laser Marking of PP and PE
Candidate controls include copper hydroxy-phosphate (BCHP). For antimony-free PP and PE marking at 1064 nm, compare declared chemistries in the exact polyolefin, pigment and filler package; do not transfer a TPU or nylon result.
Author: Aurexene Materials Engineering Team · Last updated: 2026-08-28
Quick Answer
For antimony-free PP and PE marking at 1064 nm, compare declared chemistries in the exact polyolefin, pigment and filler package; do not transfer a TPU or nylon result.
Evidence scope: This page provides method-conditioned engineering guidance. It does not claim that one commercial grade is a drop-in replacement, universally superior, or qualified for a finished part without matched evidence.
Problem
For antimony-free PP and PE marking at 1064 nm, compare declared chemistries in the exact polyolefin, pigment and filler package; do not transfer a TPU or nylon result.
The decision boundary includes the complete host formulation, colour package, supplied additive form, compounding and moulding history, part geometry, delivered laser state and the measurement method. A result is not transferable when one of those conditions changes without review.
Mechanism
Polyolefin crystallinity, low polarity, colour package and additive distribution control near-infrared absorption and the margin between carbonization and surface damage.
Laser marking is a coupled material-and-process response. Absorption and scattering determine where energy is deposited; pulse state, focus, overlap and path determine the local history; the polymer, pigments, fillers and geometry determine whether that history creates controlled contrast or a defect.
Tradeoff
A stronger absorber can reduce required energy but change base colour, dispersion demand, moulding behaviour or documentation scope.
The useful condition is a feasible region with margin, not the single darkest coupon. Contrast, edge, surface integrity, unmarked colour, processing, mechanical function, durability and cycle time must be evaluated together.
Material Strategy
Use BCHP and Black Titania as application-specific screening candidates. The list is not a performance ranking and does not establish equivalence between chemistry families.
- Freeze the host grade, colour, thickness, geometry and acceptance criteria.
- Normalize active-content and supplied-form differences or explain why another comparison basis is used.
- Screen loading and laser variables in a bounded matrix and preserve failed runs.
- Confirm the selected window across relevant lots, parts, tools and exposures.
Recommended Architectures
| Architecture | Use when | First validation gate |
|---|---|---|
| Matched baseline | The current material, colour and laser recipe require a reproducible reference. | Sb-free polyolefin marking window |
| Bounded screening ladder | Loading, supplied form, colour or delivered laser variables must be separated. | PP or PE grade; colour and filler package; Sb-free chemistry identity; dispersion and active loading; 1064 nm process window |
| Production confirmation | A candidate window must transfer across lots, geometry, tools or lifecycle exposures. | Margin, repeatability, failures and requalification triggers |
Controls That Must Stay Visible
| Order | Control | Review rule |
|---|---|---|
| 1 | PP or PE grade | Hold the other declared formulation, process, geometry and measurement conditions constant before attributing an effect. |
| 2 | colour and filler package | Hold the other declared formulation, process, geometry and measurement conditions constant before attributing an effect. |
| 3 | Sb-free chemistry identity | Hold the other declared formulation, process, geometry and measurement conditions constant before attributing an effect. |
| 4 | dispersion and active loading | Hold the other declared formulation, process, geometry and measurement conditions constant before attributing an effect. |
| 5 | 1064 nm process window | Hold the other declared formulation, process, geometry and measurement conditions constant before attributing an effect. |
Measurement & Validation
Primary response: Sb-free polyolefin marking window.
Method: Compare matched active loadings and supplied forms across resin grades, colours and process histories; measure contrast, damage and production-speed margin.
Report the unit or grade together with instrument or verifier geometry, specimen state, conditioning, repeats, distribution or uncertainty, failures and the acceptance limit. A scanner pass, photograph or supplier representative value is not a substitute for the declared method.
Qualification Boundary
- Record exact material and lot identities, active-content basis, carrier and colour package.
- Record compounding, drying, moulding, thickness, surface and geometry.
- Record source wavelength, pulse state, spot or focus, speed, hatch, passes, field and calibration.
- Measure marked and unmarked controls using the declared method.
- Confirm production and lifecycle variation, then define requalification triggers.
Primary Sources and Standards Boundary
No external standard establishes product-grade performance for this question. Use reviewed grade documents and matched laboratory or production evidence.
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Downloads & Engineering Support
Need to apply this boundary to a grade, formulation, test method, or production route? Discuss it with the Aurexene Materials Engineering Team.