Introduction

When manufacturers evaluate an infrared blocking material, they often begin with questions about optical performance:

• How much near-infrared radiation can it block?
• What visible-light transmission can be maintained?
• What happens to haze?
• How much additive is required?

But there is another question that can be equally important:

In what physical form should the infrared blocking material be supplied?

For transparent films, coatings and polymer products, the same functional chemistry may be delivered as:

Powder

Liquid Dispersion

or

Masterbatch

These three formats are not simply different packaging options.

They place very different demands on:

• dispersion technology;
• solvent compatibility;
• resin compatibility;
• extrusion equipment;
• dosing systems;
• dust control;
• optical uniformity;
• and production efficiency.

LANGYI’s current AntibariMax® Infrared Barrier Series is available in all three formats—LNT powder, JLNT dispersion and MLNT masterbatch—allowing manufacturers to select the format according to their downstream process.

Understanding these differences can help formulators avoid a common mistake:

choosing the right infrared material but the wrong supply form.

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Why Supply Form Matters

Infrared blocking in a transparent film depends on more than the intrinsic properties of the functional particle.

The particles also need to be distributed effectively throughout the coating or polymer matrix.

Poor particle distribution can create:

• agglomerates;
• visible haze;
• uneven color;
• unstable coating behavior;
• sedimentation;
• inconsistent infrared performance.

Reviews of nanoparticle-based transparent materials consistently identify aggregation and dispersion as critical factors affecting optical transparency. Aggregates large enough to interact strongly with visible light can significantly reduce transparency.

The supply form determines where that dispersion challenge is solved.

With powder, the customer solves most of it.

With a liquid dispersion, much of the deagglomeration and stabilization has already been performed.

With a masterbatch, the additive has already been incorporated into a polymer carrier.

This is why supply-form selection should begin with the customer’s process.

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Option 1 — Infrared Blocking Powder

Powder provides maximum formulation freedom.

LANGYI’s current AntibariMax® LNT is supplied as a blue-black nano powder with high active content. The product page lists active content ≥99.9% and an initial particle size of approximately 30–50 nm.

Advantages of Powder

Powder can be attractive when a customer:

• already has nano-dispersion capability;
• wants maximum control over solvent selection;
• wants to develop a proprietary formulation;
• needs high active-material concentration;
• uses multiple resin systems.

Because the customer begins with essentially concentrated functional material, powder gives high formulation flexibility.

It can potentially be incorporated into:

• solvent-borne coatings;
• resin concentrates;
• custom dispersions;
• polymer compounds.

Processing Challenges

The challenge is that primary particle size is not the same as actual dispersion size.

Nanoparticles naturally tend to aggregate because of attractive forces between particles.

A powder that contains nanoscale primary crystals may still form much larger agglomerates unless it is properly dispersed.

Academic reviews identify nanoparticle agglomeration as one of the most common difficulties in preparing optical nanocomposites.

Customers using powder may therefore need:

• high-shear mixing;
• bead milling;
• appropriate dispersants;
• surface chemistry control;
• filtration;
• particle-size analysis.

Powder is therefore best suited to manufacturers that have strong formulation and dispersion capability.

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Option 2 — Infrared Blocking Dispersion

A dispersion contains functional nanoparticles that have already been incorporated into a liquid carrier.

LANGYI’s current AntibariMax® JLNT is supplied as a blue-black dispersion. The product page lists customizable ethyl acetate or toluene systems, typical effective content of approximately 25–35%, D50 ≤50 nm and good long-term storage stability.

Advantages of Dispersion

The biggest advantage is process convenience.

A coating manufacturer does not need to begin by breaking down dry-powder agglomerates.

Instead, the dispersion can be introduced into a compatible coating or resin system.

This can reduce:

• powder dust;
• dispersion time;
• milling demand;
• batch variability.

It is especially suitable for:

• PET coating;
• automotive window-film coating;
• architectural film;
• functional coatings;
• adhesive or resin systems.

Solvent Compatibility Matters

A stable dispersion in one solvent is not automatically stable in another formulation.

Manufacturers need to evaluate:

• solvent polarity;
• resin chemistry;
• viscosity;
• dispersant compatibility;
• coating solids;
• drying conditions.

Adding a stable nanoparticle dispersion into an incompatible resin can still result in flocculation or instability.

So the correct question is not only:

“Is the dispersion stable?”

but:

“Is it stable in my complete formulation?”

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Option 3 — Infrared Blocking Masterbatch

Masterbatch moves the dispersion challenge into a polymer carrier.

Instead of dosing nanopowder into an extrusion line, the processor feeds functional granules.

LANGYI’s current AntibariMax® MLNT is available with PET, TPU, PC and PMMA carriers. Its product page lists typical effective contents of approximately 5–20%, customized according to polymer and process.

Advantages

Masterbatch can offer several practical benefits:

• easier feeding;
• reduced nanopowder dust;
• simpler production handling;
• better integration into extrusion;
• reduced need for solvent systems;
• convenient dosing.

This makes masterbatch particularly relevant to:

• PET functional film;
• PC sheets;
• PMMA products;
• TPU film;
• polymer extrusion and compounding.

Recent research on masterbatch technology also highlights its role in improving filler dispersion and incorporation into polymer composites.

Polymer-Carrier Compatibility

The main limitation is that the masterbatch carrier must match the final polymer.

For example, a PET-based masterbatch may be appropriate for a PET film process but not necessarily for every TPU or PMMA system.

Manufacturers should evaluate:

• carrier resin;
• melt-processing temperature;
• intrinsic viscosity or molecular weight considerations;
• optical compatibility;
• let-down ratio;
• final additive concentration.

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Powder vs. Dispersion vs. Masterbatch

The correct choice depends on process—not just price per kilogram.

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Why Dispersion Quality Matters for Transparent Films

Optical applications are particularly sensitive to agglomeration.

When individual nanoparticles remain sufficiently small and well distributed, visible-light scattering can remain relatively limited.

When they agglomerate, the effective particle size increases.

This may lead to:

larger structures → more scattering → higher haze → lower visual clarity

Reviews of transparent nanoparticle/polymer systems identify aggregate formation as a major reason transparency can deteriorate even when the original particles are nanoscale.

This is why a manufacturer should not evaluate only:

raw particle size

but also:

• D50 after dispersion;
• agglomerate size;
• storage stability;
• coating stability;
• final-film haze.

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How Supply Form Can Affect Haze

Imagine three customers using the same infrared functional material.

Customer A — Powder

They have excellent bead-milling and formulation capability.

The final film may achieve very good dispersion and optical clarity.

Customer B — Powder

They use only simple stirring.

Large agglomerates remain.

The final film may show higher haze.

Customer C — Pre-Dispersed Material

A properly selected dispersion is directly incorporated into a compatible resin system.

The dispersion burden is reduced.

The point is:

the intrinsic infrared material may be identical, but the final film performance can differ because of processing.

For transparent heat-control products, formulation and dispersion are part of the optical design.

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Which Form Fits Which Manufacturing Process?

Automotive / Architectural Window-Film Coating

Usually consider:

Dispersion

because it integrates naturally into a liquid coating process.

Powder may also work where the manufacturer has its own dispersion technology.

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PET Functional Film by Extrusion

Usually consider:

PET-based masterbatch

because it can be dosed directly into polymer processing.

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PC or PMMA Transparent Sheets

A compatible polymer masterbatch can simplify extrusion or molding.

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Custom R&D Formulations

Powder can provide the greatest flexibility for laboratories and formulators wanting to control:

• solvent;
• surface treatment;
• additive combination;
• solid content.

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LANGYI AntibariMax® Supply Forms

The current LANGYI portfolio is structured around three processing routes.

AntibariMax® LNT — Powder

• Blue-black powder
• Active content ≥99.9%
• Initial particle size approximately 30–50 nm
• Suitable for customer-side formulation and compounding

AntibariMax® JLNT — Dispersion

• Blue-black slurry
• Ethyl acetate or toluene systems
• Solvent system can be customized
• Typical effective content approximately 25–35%
• D50 ≤50 nm

AntibariMax® MLNT — Masterbatch

• Functional granules
• PET, TPU, PC and PMMA carriers
• Typical effective content approximately 5–20%
• Customized according to polymer and processing route

The choice should therefore begin with:

How will the customer process the material?

not simply:

Which grade contains the most active material?

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A Practical Selection Guide

Choose Powder if:

• you already have nanoparticle dispersion capability;
• you need maximum formulation freedom;
• you want to develop your own solvent or resin system.

Choose Dispersion if:

• you operate a liquid coating line;
• stable nanoscale distribution is a priority;
• you want to reduce powder handling and milling.

Choose Masterbatch if:

• you process PET, TPU, PC or PMMA by extrusion/compounding;
• you want easy dosing;
• you prefer solvent-free downstream processing.

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Looking for the Right Infrared Blocking Format?

For transparent thermal-control films and polymer products, selecting the correct functional material is only the first step.

The material must also fit your manufacturing process.

When contacting Hong Kong Langyi, it is useful to provide:

• polymer/resin type;
• coating or extrusion process;
• solvent system;
• target VLT;
• target haze;
• required NIR performance;
• film thickness;
• processing temperature.

Contact Hong Kong Langyi to discuss whether powder, dispersion or masterbatch is best suited to your application.

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FAQ

Is powder more effective than dispersion?

Not inherently. Powder has higher active content, but final performance depends on how effectively it is dispersed.

Why use an infrared-blocking dispersion?

It reduces the customer’s dry-powder dispersion burden and is especially convenient for coating formulations.

Why use masterbatch?

Masterbatch simplifies dosing and integration into polymer extrusion processes.

Can one masterbatch be used in every polymer?

No. The carrier should be compatible with the final polymer.

Why does haze increase when nanoparticles agglomerate?

Larger aggregates scatter visible light more strongly, which can reduce transparency.

Does higher additive loading always give better film performance?

No. Higher loading may increase NIR functionality but can also influence VLT, haze, color, rheology and processability.