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Advanced Additives Boost Plastic Durability With Scratch Resistance

2026-11-01

Surface protection for plastic components has become a central concern in manufacturing as automotive interiors and high-end electronics place greater emphasis on long-term appearance and durability. Anti-scratch additives are used to reduce surface friction and limit visible wear through controlled migration to the surface. Their selection depends on the polymer system and on balancing scratch resistance with optical and processing requirements.

How anti-scratch additives work

The primary function of an anti-scratch additive is to lower the coefficient of friction on the plastic surface. Through a controlled migration mechanism, the additive moves from the polymer interior to the surface and forms a protective layer. This reduces surface friction and can mask scratches and abrasion, mitigating the whitening often caused by scratching and extending component service life.

Polymer selection and technical options

Choosing an additive for a given polymer substrate is a balance between scratch performance and physical properties such as transparency and haze. The table below summarizes representative systems and their primary technical advantages.

Product	Suitable polymer	Key benefit
IncroMold™ K	General-purpose polymers, high-temperature applications	Reduces scratch whitening; improves demolding and production efficiency
IncroMax™ 100	PET, PLA, PBT	Significantly lowers surface friction at low addition levels
Incroslip™ SL	Polycarbonate (PC) and other polymers	High slip and oxidative stability
IncroMax™ 300	Polycarbonate (PC)	Improves processing performance and sheet scratch resistance

The options cover general-purpose and high-temperature processing as well as engineering polymers such as PET, PLA, PBT and PC. Their stated benefits include lower surface friction, slip, oxidative stability and demolding performance.

Applications and performance considerations

In the automotive industry, anti-scratch additives are used in dark and black plastic parts to address the visual defects caused by scratch whitening. In transparent applications such as PET and PLA, the IncroMax range is designed to provide long-term surface protection without compromising optical properties such as clarity and haze.

Processing conditions also influence additive choice. IncroMold™ K is formulated to maintain demolding and anti-scratch performance in high-temperature processing above 280°C, supporting production cycle and surface-quality objectives. Final selection generally requires balancing polymer type, formulation, processing temperature and end-use requirements.

Frequently Asked Questions

How is the dosage of an anti-scratch additive determined?

Dosage depends on the polymer type, formulation requirements and final application. For IncroMold™ K, a typical suggested addition level for reducing scratch whitening is 0.5% to 1%. Small-scale trials are advised before full production to balance performance needs and cost.

Do anti-scratch additives affect plastic transparency?

The effect depends on the chemical characteristics of the additive. The IncroMax™ series is designed for transparent polymers such as PET, PLA, PC and PMMA to provide scratch resistance while seeking to avoid adverse effects on clarity and haze in the finished article.

Do anti-scratch additives also provide mold-release effects?

Yes. Many anti-scratch additives, including IncroMold™ K and IncroMax™ 300, also function as internal lubricants, reducing mold-release force and thereby improving production efficiency and surface finishing.

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Advanced Additives Boost Plastic Durability With Scratch Resistance

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