Expanded Corrugated Structured Packing

AYRTTER is a professional manufacturer and supplier of Expanded Corrugated Structured Packing in China. We understand that in distillation, absorption, and gas-liquid mass transfer processes, the surface microstructure of the packing material has a crucial impact on liquid wetting and mass transfer efficiency. Conventional corrugated plate packings have smooth surfaces, which easily lead to the formation of streams rather than uniform liquid films; while perforated plates can provide through channels, the openings disrupt the continuous surface. To address this, AYRTTER has launched the Expanded Corrugated Structured Packing product series, employing a unique metal sheet and strip rolling and stretching process. This process preserves the integrity of the metal surface while creating uniformly distributed diamond-shaped micropores and an uneven microstructure, achieving a perfect balance between high specific surface area, excellent wettability, and high mechanical strength.

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Product Description

Expanded Corrugated Structured Packing is a structured packing product made from thin metal sheets (usually stainless steel strips) through processes such as rolling, punching, stretching, and corrugating. Its core process involves punching micro-slits into the metal sheet/strip according to a specific pattern, then stretching it vertically to open the slits and form a uniform diamond-shaped mesh. Simultaneously, the metal sheet/strip is stretched into a "rolled mesh" or "stretched mesh" with a three-dimensional microstructure.
Unlike ordinary perforated sheets, calendered perforated structures have the following unique characteristics:
The mesh is rhomboid or hexagonal, with smooth, burr-free edges.
The metal wire strands are continuous and aligned, forming a natural "microgroove" structure.
The uneven surface increases micro-roughness and enhances liquid spreading.

This structure enables Expanded Corrugated Structured Packing to have higher mechanical strength and better gas-liquid contact performance than perforated mesh under the same porosity conditions.

Product Feature

1. Unique microgroove structure enhances wetting and spreading.
During the calendering and stretching process, the metal wire strands form continuous micro-protrusions and micro-grooves. When the liquid flows on the surface of the filler, it is drawn by capillary force and spreads rapidly along the groove direction, forming a uniform and continuously renewed liquid film. This microstructure allows the calendered pore filler to maintain good wetting even at low spray density, avoiding dry walls and channeling phenomena.
2. The specific surface area is significantly higher than that of corrugated packing of the same specification.
The calendering cavity structure itself contributes additional surface area (side surfaces of the filaments and micro-protrusions). Compared to ordinary plate corrugated packing with the same corrugation parameters, Expanded Corrugated Structured Packing can increase the effective specific surface area by 20%–40%, directly translating into higher mass transfer efficiency and lower height-to-plate (HETP).
3. Gas and liquid flow in both directions, eliminating dead zones.
The calendering pores have a through-hole structure, allowing gas to pass vertically through the plates, achieving lateral mixing and redistribution; liquids can be transferred between layers through micropores and filament gaps. This characteristic effectively eliminates mass transfer dead zones within the packing layer, enabling each packing disc to have self-redistribution capabilities.
4. Reduced pressure and significant energy savings.
The airflow resistance of calendered hole structures is lower than that of perforated plates or wire mesh packings with the same specific surface area. Compared with plate corrugated packings, calendered hole packings show a very small increase in pressure drop at the same gas velocity (typically <10%), while their mass transfer efficiency is significantly improved, exhibiting an excellent efficiency/pressure drop ratio.
5. High mechanical strength, not easily deformed
Compared to wire mesh packing, calendered hole packing uses a continuous metal strip as its base material (which remains integrally connected after stretching), resulting in higher compressive and flexural strength. In large industrial towers, calendered hole packing can withstand the weight of the upper packing layers and gas-liquid erosion, making it less prone to collapse or deformation and offering a longer service life.
6. Strong anti-clogging ability and easy to clean.
The diamond-shaped opening design of the calendering holes makes it less likely for solid particles to get stuck; even if a small amount of impurities adhere, they are easily removed under the action of gas and liquid scouring. Compared with perforated plates, the edges of the calendering holes are smooth and burr-free, reducing the number of points where particles get stuck, making it suitable for working conditions containing trace amounts of solids.
7. Available in a variety of materials to suit various corrosive working conditions.
AYRTTER Expanded Corrugated Structured Packing allows for the selection of various metal materials depending on the media environment.

Compared with punching, the unique advantages of calendering and drawing processes are:
No material loss
The mesh edges are smooth and burr-free.
The metal wire strands are continuous and have high mechanical strength.
Micro-grooves are formed on the surface to enhance wetting.

Suitable media types
Medium difficulty separation system
Systems containing trace solid particles
Distillation process requiring high-purity products
For devices that require a certain pressure drop but need to improve separation efficiency (ideal application scenario for calendered porous packing).
Industrial towers with high mechanical strength requirements

Manufacturing process and quality control
AYRTTER Expanded Corrugated Structured Packing employs advanced manufacturing processes:
1. Material Selection: High-quality metal sheets are selected to ensure material purity and mechanical properties.
2. Precision punching: CNC punching equipment is used to ensure precise cut dimensions and neat arrangement.
3. Calendering and stretching: Specialized stretching equipment ensures uniform mesh size, continuous wire strands, and no breaks.
4. Heat treatment for shaping: Eliminates internal stress and stabilizes the shape and size of the mesh.
5. Corrugated Forming: Corrugations are pressed onto a precision mold, ensuring precise corrugation angle and height.
6. Cleaning treatment: Remove surface oil and impurities.
7. Assembly and shaping: punching, edge rolling, and assembling into filler units or tray modules.
8. Quality Inspection: Dimensional inspection, specific surface area testing, porosity verification, and pressure drop performance testing.
AYRTTER Expanded Corrugated Structured Packing complies with ISO9001 quality management system certification, ensuring stable performance and reliable quality for each batch of products.

Why choose AYRTTER ?
Own factory, years of experience in designing and manufacturing structured packings
The calendering and stretching process is mature, resulting in uniform mesh size and continuous wire strands.
ISO9001, CE and other certifications, with export qualifications
Our products cover a wide range of industries, including fine chemicals, petrochemicals, environmental protection, and pharmaceuticals.
Provides full-process technical support from selection and calculation to installation.
Direct sales, no middlemen, high cost performance

In today's pursuit of higher separation efficiency and lower operating costs, AYRTTER Expanded Corrugated Structured Packing, with its combined advantages of microgrooved enhanced wetting, high specific surface area, low pressure drop, and high mechanical strength, has become an ideal upgrade choice for distillation columns, absorption columns, and washing units. It strikes a perfect balance between the high throughput of plate corrugated packing and the high efficiency of wire mesh packing.
Choosing AYRTTER means choosing the best balance between efficiency and throughput.

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