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What Is Airlay? A Complete Guide to the Nonwoven Process

The Random Airlaid Process is a dry-laid nonwoven technology that uses airflow to randomly deposit individual fibers into a uniform web structure. Unlike carded or spunbond nonwovens, The Airlaid process achieves true isotropic orientation, which enhances strength, durability, and dimensional stability.

Introduction to Airlay Technology

Airlay, also known as the dry-laid process, is a nonwoven textile manufacturing method where loose fibers are dispersed in an airstream and deposited onto a forming belt to create a web. Unlike wet-laid or spunbond processes, Airlay does not require water or extrusion, making it ideal for blending natural and recycled fibers. This unique Airlay technology supports sustainable textile solutions and offers high versatility across multiple applications.

The Airlaid process while running at a slower production speed makes a stronger bond with the fibers than a carding machine. Carded fiber pad has a tendency to delaminate or come apart in layers while a random Airlaid fiber pad holds a more consistent and stronger pad and can achieve a higher loft.

How Airlay Nonwovens Are Made

  1. Fiber Preparation

  • Fibers are selected based on the desired properties (e.g. pulp, viscose, cotton, polyester).
  • Commonly used: wood pulp, natural fibers, recycled fibers, and binder fibers (like bi-component fibers).
  1. Fiber Opening

  • Fibers are opened and separated into individual or small fiber clusters using deflakers or fiberizers.
  • The goal is to create a loose, fluffy mix of fibers.
  1. Fiber Air Suspension (Air laying)

  • The opened fibers are entrained in a high-speed airstream.
  • This air stream carries the fibers through a duct or chamber toward a forming screen or belt.
Airlay Machines
  1. Web Formation

  • The fibers are pulled out of the airstream onto a perforated conveyor belt or rotating drum using vacuum suction from below.
  • This forms a loose, randomly oriented web on the surface.
  • The thickness and density can be controlled by adjusting air speed, fiber feed, and vacuum pressure.
  1. Web Bonding

After the web is formed, it must be bonded to gain strength. There are several bonding methods:

a) Thermal Bonding

  • Uses bi-component fibers (e.g., fibers with a low-melting sheath) or thermoplastic binders.
  • Web is passed through heated rollers or an oven, melting the binders to bond fibers.

b) Latex Bonding (Chemical)

  • A liquid binder (latex) is sprayed or printed onto the web.
  • Followed by drying to cure and bond the structure.

c) Hydrogen Bonding (for pulp-based Airlaid)

  • Uses mechanical compression and moisture to form hydrogen bonds between cellulosic fibers.
  • Typically used in toilet paper or napkins.

d) Needle Punching or Hydroentanglement (less common in pure Airlaid, sometimes hybridized)

  1. Drying & Curing (if chemical bonding used)

  • A drying oven removes moisture and cures any chemical binders applied.
  1. Finishing

  • The bonded web may go through processes like calendaring, cutting, molded, embossing, perforating, or lamination.
  • Final products are rolled or sheeted for shipment.

Airlay excels in using reclaimed textile waste, cotton, wool, hemp, kenaf, Jote, and synthetic scraps, making it an eco-friendly fabric solution.

Machines Rando

Key Properties of Airlay Materials

Loft and bulk

Rando equipment supports lofts up to 10” and width up to 124”

Insulation capabilities

Effective for both thermal insulation and acoustic performance.

High recovery and resilience

The structure springs back after compression.

Applications of Airlay Nonwovens

Automotive interiors (acoustic insulation, trunk liners)

Used in trunk liners, acoustic dampening panels, and seat padding.

Home insulation materials

Wall and roof insulation panels with strong thermal performance.

Filtration media

Airlaid material makes excellent filter media.

Bedding and mattress padding

Comfortable and breathable layers in mattresses.

Benefits of the Airlay Process

Allows incorporation of high-recycled content

Airlaid equipment allows you to use not only recycled content but by adding a refiberizer you can run your own scrap back through the equipment after it has been bonded.  

Highly customizable GSM and thickness

You are able to get a more consistent product with tighter tolerances using an Airlaid machine instead of carding equipment.

Innovations in Airlay Technology

High Loft Condenser

Versatility: make webs from ½” to 10” with no changeover, and runs a wide variety of natural and synthetic fibers

Web quality: The High Loft Condenser makes an isotropic web in a single pass, eliminating cards and cross lappers

Vertical Pre Opener

This new machine is designed to allow fiber to be fed vertically and pre-opened with a feed roll, main cylinder and brush roll. Rando rolls are wired vs. the competitors pinned rolls. Wired rolls are more cost effective to manufacture and require less servicing by the customer. Robustly built, the Vertical Pre-Opener is manufactured in standard widths from 36” to 100”. The vertical design creates a smaller footprint than earlier designed pre-openers that fed horizontally, thus running cleaner with gravity and constant vacuum pressure.

Conclusion

Airlay represents a powerful and sustainable method for producing versatile, high-performance nonwovens. With its flexibility in fiber sourcing, bonding, and structure, it is rapidly expanding across automotive, construction, and eco-friendly packaging sectors.

Frequently Asked Questions

What is the Airlay process used for?
Airlay is used to manufacture insulation, acoustic padding, filtration media, and sustainable packaging.
What materials can be used in Airlay nonwovens?
Natural fibers, synthetic scraps, reclaimed textiles, and recycled blends including vinyl fiber, polyester, nylon, stainless steel, rayon, and carbon.
Are Airlay fabrics environmentally friendly?
Yes, especially when made with recycled or natural materials and dry-laid processing.
What’s the difference between carded and Airlay webs?
Carded webs are fiber-aligned using mechanical rollers, while Airlay uses air currents for deposition.
How does Airlay improve thermal insulation performance?
Its lofted, layered structure traps air and resists heat transfer effectively.
What industries benefit most from Airlay nonwovens?
Automotive, construction, bedding, filtration, and sustainable packaging.
Is Airlay suitable for acoustic insulation?
Absolutely. Its porous, dense structure absorbs sound and reduces vibration.
Can Airlay materials be made from 100% recycled fibers?
Yes, depending on bonding technique and fiber quality.
What is the GSM range typically supported in Airlay fabrics?
Airlay fabrics can range widely from 15 GSM to over 5,000 GSM+, depending on the application.

Rando Airlaid Technology: High-Performance Nonwoven Solutions for Filtration, Hygiene & Insulation

Rando Airlaid® technology is an advanced nonwoven manufacturing process that delivers high-loft, isotropic, and uniform fiber webs ideal for demanding applications such as air filtration, medical wipes, thermal insulation, automotive acoustics, and hygiene products. Developed by Rando Machine Corporation, this airlay method ensures superior fiber distribution, performance consistency, and design flexibility.

Rando Machine
100 Rawson Road, Suite 230
Victor, New York 14564 USA
646.817.4218

www.randomachine.com

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Every company has one machine that defines it. For Rando, it is the Webber. This machine is the airlaid web former that gave the company its name, and three quarters of a century later it is still the reason customers bring Rando their hardest fibers. The Webber does one thing exceptionally well: It lays loose fiber into a uniform web with true random orientation, and it does it with materials most equipment cannot touch.

Why random fiber orientation excels

There are many options for fiber web forming on the market. Many often look to carding machines for forming webs, and while carding certainly has its applications, it also has it’s limitations. Carding combs the fibers until they line up in the machine direction, which makes a web that is generally strong one way and weak the other. The Rando Webber does the opposite. It distributes fiber randomly and evenly in every direction, so the web has isotropic strength, meaning equal strength in all directions. That randomized uniformity the intention of the Rando Webber, and it is where the company got its name.

For a buyer, isotropic strength shows up as real performance: consistent weight, consistent loft, and uniform quality across the full width of the web. A web that behaves the same in every direction is easier to convert, more predictable in the field, and better suited to demanding applications from composites to filtration and everything in between.

One mechanism, built for control

The Webber forms the web with air, using a split air system that works the fiber with both pressure and vacuum, paired with AC variable-speed motors that give the operator fine control over how the fiber lands. That control is what produces the uniformity, and it is what lets a single platform run an unusually wide range of material and web geometry. Webs come off the machine anywhere from 12 to 110 inches wide, from thin veils to thick high-loft batts.

The Webber is also built on Rando’s wide options of configurations, it is not limited to a single configuration. It comes in three condenser styles, so the same platform can be tuned to the fiber and the web you actually need.

The SB condenser is built for heavier fibers, roughly 25 to 100 denier and above, forming at up to 66 feet per minute. The SD condenser handles the fine end, from nano fibers up to 100 denier, and runs fast, up to 150 feet per minute. The SHL condenser adds high loft to everything the SD can do, forming webs from three quarters of an inch to a full 10 inches tall.

What makes the SHL remarkable is the control. An operator moves loft across that entire range by adjusting speeds on the HMI, with no mechanical changeover. Many competitors lack the condenser optionality, and this optionality adds revenue generating potential for our customers.  It runs fiberglass, synthetics, and natural fibers like hemp, jute, wood, and cotton with equal ease. That span, from a nano-denier veil to a 10-inch batt, is why one Webber platform can serve markets that would otherwise need several different machines.

The fibers other machines refuse

The Webber’s real signature is what it will run. Rigid and specialty technical fibers, glass, carbon, ceramic, and metallic fibers cause significant complications on equipment built for polyester. Thanks to Rando’s supporting fiber opening machinery, the Rando Webber can bring in low-melt fibers like polyester or polyethylene bicomponents, blends of dissimilar lengths and deniers, and recycled and regenerated waste. 

Since 1949, Rando has taken pride in its ability to produce machinery that serves multiple industries. The same machine that runs stainless steel fiber for abrasive pads runs recycled shoddy for sustainable insulation, and even fiberglass edge trim reclaimed from a Rando’s bonded panel recycling machinery. With one forming platform, an enormous range of fibers are possible.

From the lab to the production floor

Rando builds its Rando Webber from pilot width up to wide commercial lines available in multi-meter width formats. With a visit to our trial facility in Victor, New York, a customer can prove a process on Rando’s pilot line and then buy the production version of the very machine they tested. The webs it forms end up in automotive components, filtration media, geotextiles, medical disposables, insulation, and more.

Since 1949, the Rando Webber has been our centerpiece machine for the fibers our competitors struggle with.

Book a trial on our Pilot Line today to see the Rando Webber in Action

Rando Machine has been designing and manufacturing nonwoven technology since 1949

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