What Is Plastic Igel Ball Packing? Structure, 40 mm Specifications and Selection Boundaries

Plastic Igel Ball is a spherical plastic random packing characterized by numerous radial projections around an open body. Its geometry creates substantial external contacting surface while maintaining internal and inter-element flow spaces for gas-liquid contacting.

DAIER's verified product database currently contains a 40 mm Plastic Igel Ball model with approximately:

• 300 m²/m³ specific surface area
• 87% void fraction
• 102 kg/m³ bulk density
• 473 m⁻¹ dry packing factor. 

The main engineering question is:

When does the spiked spherical geometry of Plastic Igel Ball provide useful contacting behavior, and when would a more open ring, saddle or hollow-ball packing be more appropriate?

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1. What Is Plastic Igel Ball?

Plastic Igel Ball is a plastic random packing with a roughly spherical body surrounded by numerous short radial projections.

“Igel” comes from the German word for hedgehog, which describes the characteristic appearance of the packing.

Unlike conventional random packing such as:

• Pall Ring;
• Raschig Ring;
• Intalox Saddle;

Igel Ball does not rely primarily on a cylindrical or saddle-shaped body.

Instead, its engineering identity comes from:

Spherical Body + Multiple Radial Projections + Open Internal Structure

Individual balls are randomly loaded into a packed bed.

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2. What Does the Spiked Geometry Do?

The numerous radial projections increase the number of external surfaces exposed to the liquid and gas phases.

Liquid can contact:

• the projection surfaces;
• the spherical body;
• neighboring Igel Balls.

Gas can flow:

• around the projections;
• through open spaces in the element;
• between neighboring packing pieces.

This creates a three-dimensional bed containing many local:

• contact points;
• flow-direction changes;
• liquid redistribution opportunities.

The geometry therefore emphasizes:

Distributed Contacting Surface

rather than a simple open ring passage.

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3. Verified DAIER Specification

DAIER's catalog-confirmed engineering database currently lists one Igel Ball product class:

 

DAIER's separate product specification material also identifies it as approximately 1.6 in / 40 mm Plastic Igel Ball.

Because the current verified product series contains one principal size, this is not primarily a:

25 vs 50 vs 76 mm selection problem.

The more important decision is whether Igel Ball geometry itself fits the process.

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4. Why Is 300 m²/m³ Surface Area Significant?

The verified specific surface area is approximately:

300 m²/m³.

This is relatively high for a 40 mm plastic random-packing element.

The large geometric area results from the many projections rather than simply from making the packing extremely small.

That can make Igel Ball interesting where the process wants:

• substantial geometric contact area;
• plastic construction;
• a three-dimensional spherical packing structure.

However:

300 m²/m³ geometric surface area is not the same as 300 m²/m³ effective wetted area.

Actual effective area depends on:

• liquid wetting;
• surface tension;
• liquid load;
• distributor performance;
• operating conditions.

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5. Why Is the Void Fraction Lower Than Some Highly Open Plastic Packings?

The verified void fraction is approximately:

87%.

Some highly open plastic random packings can have void fractions above 90%.

Igel Ball contains numerous physical projections and contacting structures.

These occupy some of the packed-bed volume while providing additional geometric surface.

This creates an important product trade-off:

More Contacting Structure ↔ Less Free Volume

Therefore, Igel Ball should not automatically be selected where maximum hydraulic openness is the dominant objective.

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6. What Does the Dry Packing Factor Tell Us?

The verified dry packing factor is approximately:

473 m⁻¹.

Packing factor is one useful indicator of the geometric resistance created by a packed bed.

A relatively high packing factor indicates that the geometry should not be treated as an extremely open, very-low-resistance packing.

Therefore, Igel Ball may make more sense where:

• contacting area matters significantly;

than where the primary objective is simply:

• maximum gas capacity;
• minimum hydraulic resistance.

Actual pressure drop still requires real gas and liquid operating data.

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7. Where Can Plastic Igel Ball Be Considered?

Igel Ball may be evaluated for suitable:

• gas absorption;
• chemical scrubbing;
• odor treatment;
• gas-liquid contacting;
• some water-treatment or air-treatment processes.

Its strongest position is where the project values:

High Geometric Contacting Area + Plastic Construction + Three-Dimensional Random Bed

But application name alone cannot establish suitability.

The actual tower still requires evaluation of:

• gas load;
• liquid load;
• chemistry;
• temperature;
• fouling;
• allowable pressure drop.

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8. Gas Scrubber Applications

Plastic Igel Ball may be considered in scrubbers when:

• substantial contacting area is useful;
• the process is compatible with the selected plastic;
• hydraulic capacity remains adequate.

It may be particularly interesting in systems where liquid contact with many small projecting surfaces is useful.

However, a high-throughput scrubber with very strict pressure-drop limits may favor a more open packing family.

Therefore:

Igel Ball is a contact-area-oriented candidate—not automatically the best scrubber packing.

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9. Absorption Applications

For absorption, the packing must create effective gas-liquid contact.

Igel Ball provides substantial geometric surface within a relatively compact element.

Potential advantages may include:

• repeated liquid spreading;
• many wetted surface locations;
• three-dimensional gas-liquid contact.

But absorption performance still depends on:

• liquid distribution;
• liquid-to-gas ratio;
• bed depth;
• equilibrium behavior;
• mass-transfer kinetics.

Packing geometry alone cannot define removal performance.

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10. Odor-Control Applications

Igel-type plastic media may also be evaluated in suitable odor-control towers where gas is contacted with a circulating liquid.

The spherical geometry can be useful where:

• distributed liquid contact;
• plastic corrosion resistance;
• moderate bed weight

are valued.

However, odor-control systems can vary widely.

For example:

• clean soluble gas absorption;

is a different problem from:

• dirty biological or particulate-laden exhaust.

The correct packing must match the actual contaminant and fouling mechanism.

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11. Plastic Material Benefits

Plastic construction can provide:

• lower weight than ceramic packing;
• molded complex geometry;
• useful corrosion resistance in compatible chemistry;
• easier handling.

Possible resin choices depend on the manufacturer and project.

The final material should be confirmed against:

• chemical composition;
• concentration;
• temperature;
• solvents;
• oxidizers.

Do not assume all Plastic Igel Balls have identical chemical resistance.

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12. Material Compatibility Is Separate from Igel Geometry

This distinction matters.

Selecting Igel Ball answers:

Which geometry?

It does not automatically answer:

Which polymer?

The correct workflow is:

Process Chemistry → Select Compatible Polymer → Confirm Whether Igel Ball Geometry Fits the Hydraulic and Mass-Transfer Requirement

A suitable shape manufactured from an unsuitable resin is still the wrong product.

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13. Fouling: Why Igel Ball Needs Careful Review

The multiple projections create substantial surface but also many locations where deposits can accumulate.

Potential foulants include:

• scale;
• salts;
• biological material;
• suspended solids;
• sticky contaminants.

Deposits may form:

• between adjacent projections;
• at contact points between balls;
• on internal surfaces.

Therefore, claims such as:

“Igel Ball never clogs”

or

“excellent anti-fouling in every service”

would be inappropriate.

Actual fouling tolerance depends on the process.

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14. When Fouling Becomes the Main Constraint

If the process contains heavy:

• crystallization;
• solids;
• sticky deposits;

then a more open random packing may provide better operating reliability.

The engineering decision can shift from:

How much contacting surface can the bed provide?

to:

How long can the tower operate before deposits restrict the bed?

In those cases, the higher geometric area of Igel Ball may be less important than maintaining large open flow channels.

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15. Igel Ball vs Polyhedral Hollow Ball

These products should not be treated as synonyms.

Plastic Igel Ball

Characterized by:

• numerous outward radial projections;
• spherical overall form;
• relatively high verified surface area;
• 40 mm catalog size.

Polyhedral Hollow Ball

Characterized by:

• hollow multi-faceted/open framework;
• internal and external rib structure;
• a broader verified size range.

The engineering difference is therefore:

Igel Ball → projection-rich contacting surface

versus

Polyhedral Hollow Ball → hollow open framework

S120 covers the Polyhedral Hollow Ball product family separately.

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16. Igel Ball vs Teller Rosette

Teller Rosette uses a highly open looped or rosette-type skeletal geometry.

That tends to place stronger emphasis on:

• open void spaces;
• hydraulic passage.

Igel Ball has numerous projections and a relatively high specific surface area.

Therefore:

Igel Ball

May move higher when:

• contacting-area density is important.

Teller Rosette

May move higher when:

• hydraulic openness;
• fouling tolerance

receive stronger priority.

The correct comparison still depends on actual sizes and process conditions.

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17. Igel Ball vs Plastic Pall Ring

Plastic Pall Ring is one of the most established conventional random packings.

Its advantages include:

• broad industrial familiarity;
• many available sizes;
• well-understood open ring geometry.

Igel Ball uses a significantly different spherical projection geometry.

Igel Ball may deserve evaluation when:

• high geometric area within a spherical random element is attractive.

Pall Ring may remain preferable when:

• conventional hydraulic behavior;
• multiple size options;
• replacement compatibility

are more important.

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18. Igel Ball vs Tri-Pack-Type Packing

Tri-Pack-type packing is designed around a highly open, multi-flow-path geometry.

Its engineering position often emphasizes:

• hydraulic openness;
• gas capacity;
• fouling tolerance.

Igel Ball has a stronger contact-surface-density direction.

Therefore:

Igel Ball and Tri-Pack should not be ranked from product names alone.

They represent different balances between:

• contacting area;
• open volume;
• hydraulic behavior.

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19. Is Igel Ball Suitable for High Gas Throughput?

Potentially, but this should not be assumed.

Its verified:

• 87% void fraction;
• 473 m⁻¹ dry packing factor

show that Igel Ball is not simply an ultra-open high-capacity packing.

For high gas-rate service, engineers should compare it with more open alternatives.

The appropriate question is:

Does the additional contacting area justify the hydraulic resistance for this project?

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20. Tower Diameter Still Matters

The verified nominal size is approximately 40 mm.

That means the tower should have enough diameter for many packing elements to populate the cross-section randomly.

In a very small tower, a 40 mm element may create stronger:

• wall effects;
• bed non-uniformity.

The product should therefore not be selected without knowing:

• tower internal diameter.

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21. Retrofit Applications

Plastic Igel Ball may be evaluated when replacing another random packing because of:

• material issues;
• required contacting area;
• operating changes.

Before replacement, collect:

• old packing type;
• old packing size;
• packed height;
• tower ID;
• gas/liquid load;
• pressure-drop history;
• fouling history;
• support-grid details.

A direct equal-volume replacement does not guarantee equal:

• pressure drop;
• capacity;
• mass-transfer performance.

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22. Support Grid Requirements

The support grid must retain the 40 mm packing and provide enough open area for:

• gas passage;
• liquid drainage.

The verified dry bulk density is approximately:

102 kg/m³.

Support design should consider:

• dry bed weight;
• liquid holdup;
• fouling load;
• bed depth.

For lightweight plastic random packing, movement under abnormal gas loading should also be reviewed.

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23. When Is Plastic Igel Ball a Strong Candidate?

Plastic Igel Ball deserves stronger consideration when:

• substantial geometric contacting area is desired;
• plastic construction is chemically compatible;
• the process is relatively clean to moderately fouling;
• hydraulic requirements can tolerate the packing geometry;
• 40 mm packing size is appropriate for the tower.

Its strongest identity is:

Projection-Rich Spherical Geometry + High Specific Surface Area + Plastic Random Packing

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24. When Should Another Packing Be Considered?

Igel Ball may become less attractive when:

• severe fouling or crystallization exists;
• maximum bed openness is the primary requirement;
• pressure drop is extremely restrictive;
• a much larger or smaller packing size is required;
• demanding distillation performance points toward another random packing or structured packing;
• the selected plastic is chemically incompatible.

The product should solve a real contacting problem rather than simply provide an unusual geometry.

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Plastic Igel Ball Decision Table

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Common Selection Mistakes

Confusing Igel Ball with Polyhedral Hollow Ball

They are distinct geometries.

Selecting It Only Because Surface Area Is 300 m²/m³

Effective mass transfer depends on wetting and operating conditions.

Assuming the Spikes Guarantee Better Efficiency

Geometry alone does not guarantee tower performance.

Assuming It Is Non-Clogging

Projection-rich surfaces can still accumulate deposits.

Ignoring the 87% Void Fraction

It is less open than several other plastic random-packing families.

Assuming All Igel Balls Have the Same Specification

DAIER's verified values apply to its catalog-confirmed 40 mm product; supplier geometries may differ.

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Frequently Asked Questions

What is Plastic Igel Ball packing?

Plastic Igel Ball is a spherical random packing with numerous radial projections that create a large geometric contacting surface.

What size is confirmed in DAIER's database?

DAIER currently confirms a 40 mm Plastic Igel Ball product.

What is its specific surface area?

Approximately 300 m²/m³ in DAIER's verified database.

What is its void fraction?

Approximately 87%.

What is its bulk density?

Approximately 102 kg/m³.

Is Igel Ball the same as Polyhedral Hollow Ball?

No. Igel Ball uses numerous outward projections, while Polyhedral Hollow Ball uses a hollow multi-faceted framework.

Is Igel Ball suitable for scrubbers?

It may be a useful candidate where its contacting area, hydraulic characteristics and polymer compatibility match the scrubber conditions.

Is Igel Ball good for fouling service?

Moderate fouling requires review; severe deposits or crystallization may favor a more open geometry.

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Selection Takeaway

Plastic Igel Ball is a distinctive 40 mm random packing whose engineering value comes from combining a projection-rich spherical structure with substantial geometric surface area.

Its verified DAIER parameters are approximately:

40 mm | 300 m²/m³ Surface Area | 87% Void Fraction | 102 kg/m³ Bulk Density | 473 m⁻¹ Packing Factor.

This places it toward:

Contacting-Area-Oriented Plastic Random Packing

rather than the most hydraulically open end of the random-packing spectrum.

The correct selection sequence is:

Process Duty → Required Contacting → Hydraulic Requirement → Fouling → Tower Diameter → Polymer Compatibility → Igel Ball Evaluation

The key principle is:

Choose Plastic Igel Ball when its projection-rich spherical geometry provides useful contacting area for the actual process—not simply because its appearance or catalog surface-area number is distinctive.