Fiber Shape & Modification Ratio

The shape of the fibers in a carpet’s yarn system is important because it affects the carpet’s appearance and performance – including how long the carpet can be expected to last, how easy it will be to clean, and how well the fibers will resist soil and dirt.

The fiber modification ratio – calculated on the cross-sectional shape of the carpet fiber – contributes to these soil-hiding properties as well as longevity and overall performance.

What is modification ratio?

Modification ratio estimates a fiber’s performance, using a mathematical calculation based on the roundness of the fiber. The rounder the fiber, the lower the modification ratio, and the better the carpet will perform.

Modification ratio is calculated by comparing the outer circumference of the fiber to the circumference of the inner circle. The smaller the ratio, the more soil resistant the fiber will be and the better the carpet will wear. The larger the ratio, the more likely the fiber will trap and hold soil and the carpet might experience premature pile crush or matting.

Modification Ratio =

(outer circumference)
(inner circumference)

Consider Modification Rates Based on Traffic

The preferred modification rate (MR) for medium to high traffic areas = <2.2
The preferred MR for high to very high traffic areas = <1.5

The fibers in ShadowFX carpet tile have a modification ratio of 1.5 – 2.1.
By comparison, carpet-mill extruded Type 6 Nylon has a ratio of as much as 4.7.


ShadowFX premium-branded fibers key to durability and long-lasting beauty.

Premium branded, solution-dyed nylon fibers with low modification ratios are key to the durability and long-lasting beauty of our ShadowFX carpet tile.

Why premium fibers?
Mill-extruded fibers are value-engineered for mill profitability and process expedience. Since fibers are the building blocks of a robust carpet tile, this is the wrong place to cut corners.

Appearance and longevity rely heavily on the quality and shape of the individual fibers. In a 24/7 space like a 9-1-1 call center, durability and longevity are mandatory. Replacing the carpet because it no longer looks good would be like closing a Los Angeles highway during rush hour to repair a roadway built with fragile concrete.

How do you know if a fiber is carpet-mill-extruded?
It’s easy: for starters, mills making their own fibers use their own carpet mill brand names for describing the nylon. Example XYZ Mill Premium Branded Nylon.

What if modification ratio info is missing from a suppliers literature?
You should ask for this information from the manufacturer. It is readily available. If they won’t supply the information or claim that modification ratio is not relevant to your project, you might ask yourself why they would conceal a fact that is readily available from premium-branded fiber manufacturers like Universal, Invista and Aquafil.

Here’s a real example of the use of Modification Ratio taken from a flooring specification for a government healthcare project in Indiana:
Face Fiber: 100% Nylon, Premium Branded by Invista, Universal or Aquafil. All fibers must have a modification ratio of 2.5 or less. Fibers extruded by carpet mills will be considered “unbranded” for purposes of this standard.

Passing the Test

We go beyond standard wear testing with our proprietary ART – Appearance Retention Test.

ART is the only test of its kind to simulate real world usage for 1 year, 5 years, 10 years or more.

To illustrate the superior performance of the fibers we use, we ran a 10 year wet and dry ART test on ShadowFX carpet with a fiber modification ratio of less than 2.0, along with a competitive product made with fibers with a modification ratio of greater than 2.5.

See the cross section of each fiber and the before and after images of the length of the fibers. Notice the abrasion and breakdown of the fiber in the competitive product.

ShadowFX Floating Floors

Install Over Any Existing Hard Surface – An Ideal Option For Occupied Workspaces

Create a floating floor by positioning ShadowFX carpet tiles over GroundBridge™, then join tile corners with TacTiles®.
ShadowFX ESD carpet tile is made in a sustainable factory using recycled materials.
100% carbon neutral over the life of the carpet.


Play Video
Play Video
Background image shows a close up of an ohmmeter. The title ESD Flooring: Why Some Carpet Cannot Be Grounded is displayed in bold white text against a rectangle of dark blue grey at the bottom of the image and just above is the text "Static Shorts with StaticWorx - Right from the Den" and the StaticWorx logo
Play Video
Play Video

ShadowFX Static-dissipative (SC) Carpet Tile Collections

Looking for easy installation of Staticworx ESD Carpet Tile over your bare access floor panels?

ShadowFX SDC with TacTiles® is your solution.

  • Installation economy - no adhesive required
  • Guaranteed to meet all ESD standards for any application
  • ShadowFX carpet tiles with dissipative backing are grounded upon contact with metal panels Carpet tiles are easily lifted and replaced

With its simple, subtle texture and diversity of color options, Shadow FX SDC Solids is a popular choice for many styles of interior. It’s also ideal for mixing and matching with other Shadow FX SDC carpet tiles, to create accents, inserts, borders or checkerboard effects – a really useful, versatile tool for designers.

After two or three years of use, carpet tiles exposed to chair casters and heavy traffic used to be prone to pile crush, making them look different from adjacent tiles. The main factor contributing to this problem was the pattern designs used in typical ESD carpet tile. All of these systems were either a solid pattern with slightly mottled colors or linear patterns with directional lines. Because carpet tiles appear seamless, like one large continuous floor, worn areas would stick out like a coffee stain on a white shirt.


The solution: Learning from nature.


Based on biomimicry - the study and imitation of nature’s best ideas to solve human problems – Staticworx ShadowFX static-dissipative (SD) carpet tiles mimic the organic design of nature. Tiles vary in patterns and colors within one style and colorway - all but eliminating the ability to observe pile crush or other forms of wear between tiles.


Because there’s no need to worry about matching dye lots, you need less attic stock and selective replacement is more effective. Replacement tiles are almost indistinguishable from older - original - tiles in the same installation.


Non-directional Installation for Less Installation Waste


ShadowFX SDC Patterns and Cubic Collections offer the added benefit of non-directional installation, meaning that tiles can be laid in any order or orientation. With no set pattern to maintain and no need to align tiles in a certain direction, there is significantly less installation waste. In fact, the average ShadowFX non-directional installation produces only 1.5% waste versus an average of 14% for other carpet styles. That means more of your floorcovering investment is on your floor, not in a dumpster.


And the best part, ShadowFX carpet tiles can be installed without glue, as a floating floor over any hard surface.



Simplicity Meets Style

Treez, our latest ShadowFX carpet tile collection, marries timeless style with the simplicity in nature. Tufted, textured loop construction adds dimension, creating a look as natural and stately as the bark on a tree. As appealing and comfortable in an uptown financial services space or high-tech lobby as in a workhorse application such as a data center or manufacturing facility.

In sophisticated tones with threads of complementary colors in varying widths, our Parks Series carpet tile puts an earthy twist on classic linear design. A low-profile face uses less material for a tailored, upscale aesthetic.

Like the stately summits of Vermont, our Peaks series carpet tile combines natural beauty with zen-like tranquility. Elegant in pattern and texture, with colorways in both warm and cool tones, our Peaks collection gives you a floor with dimension, functionality, and character.

Humans instinctively crave a connection to nature. Time spent in holistic places like Vermont provides a sense of comfort and wellbeing while promoting physical and mental health.

Inspired by the natural world, our ShadowFX Vermont Fields and Stone Carpet Tile Collection brings nature into the workspace, evoking feelings of serenity and refuge. A fusion of organic design and neutral color palette makes this dynamic collection as ideal for urban as for country or rural environments.

ShadowFX SDC Chenille Warp Carpet is a tufted patterned level tip-sheared pile carpet tile, with SD backing. The pile material is made from recycled solution-dyed nylon. The fundamental aesthetic of Chenille is stripes which have been interpreted in a bold and textural way without relying on heavy face weight. Shadow FX Chenille Warp is available in colorways. The tiles can be installed in a variety of ways including quarter-turn, ashlar, brick fashion and parquet, with the potential to provide an unconventional appearance.

Linear precision, softened by texture and offset shapes.

As its name suggests, Furrows II has a resilient patterned loop pile carpet, reflecting the linear regularity of ploughed fields. Its textured, structured loop pile creates the three-dimensional impression of an aerial view of a cultivated landscape.

Designed for heavy contract performance, ShadowFX Furrows II maintains its distinctive appearance even in high-traffic areas. Pile yarn and backing contain pre-consumer recycled material, minimizing environmental impact.

Built to withstand heavy traffic and abuse and designed to address the most stringent static control requirements - making Vermont Slate ideal for any application from electronics manufacturing to labs to 24/7 critical environments.

StaticWorx Vermont Slate carpet-tile collection provides the durability and high performance you expect from StaticWorx floors in a design that transports you to the mountains of Vermont. Warm, monochromatic earth tones promote a peaceful environment, inspiring creativity and a sense of wellbeing and connectedness.

The rock-like etchings in our Vermont Slate carpet tiles flow seamlessly across the surface of the floor in a non-directional or monolithic installation. Merge-ability enables mixing dye lots and saves money by allowing you to add new or replace worn or damaged tiles without worrying about dye lot compatibility.

  • Mergeable design - eliminates worry about matching dye lots
  • No fade – solution-dyed yarn prevents fading
  • Non-directional install method – easy to install and replace
  • Durable – rated for high traffic
  • Superior static control performance – meets the most stringent ESD standards including ANSI/ESD S20.20 and IEC 61340-5-1:2016*
    • Lifetime warranty for static control.
  • Static dissipative – meets standards for electronics manufacturing, telecom and government spaces**

ShadowFX™ Planx offer a more expressive visual vocabulary.

Our 25cm x 1m Shadow FX ESD Planx bring new proportion and scale to carpet tile, giving you power to create fresh, exciting floor designs. The scale and directionality of Shadow FX ESD Planx creates floors that better reflect the geometry and flow of the surrounding space.

Planx or squares, our tiles all work together.

Use square tiles with contrasting Skinny Planks for large-scale tile patterns, provide wayfinding cues, or for work and activity zones. And this is just the beginning!

StaticWorx modular carpet tile and Planx work together in any combination, giving you a carpet tile design platform with unparalleled options.

A shape that’s better at hiding seams.

Want the benefits of carpet tile without the look of carpet tile? Use Shadow FX ESD Planx, same style and color, laid in an ashlar pattern. They’ll blend near seamlessly across the floor, giving you the benefits of modularity and the continuous look of broadloom.

A soft hard surface.

Love the look of wood plank flooring? Think luxury vinyl plank flooring is stunning? Patterns—like herringbone or ashlar—give ShadowFX Planx the visual appeal of other plank floors, with the patterning possibilities. You also get a floor covering that’s soft, quiet and much more economical than hard surfaces.

Get in Touch

The form below will help us better understand your needs and get you as quickly as possible to the right person. We look forward to helping you solve your static problem!

You can expect a response within 24 hours. For faster service, please give us a call: 617-923-2000

Play Video

StaticWorx high-performance static-control floors protect electronic components, explosives, and high-speed computers from damage caused by static electricity. ESD flooring is part of a system. Choices should always be based on objective, researched evidence. When you partner with us, we look at all possible items that may need to integrate with the floor, and, focusing on your goals and objectives, help you find the right floor for your application.

Get in Touch

East Coast: 617-923-2000
Email: [email protected]

“I’m so glad we were able to find an attractive solution that didn’t leave us with some run-of-the-mill ugly disaster.”

Share This

subscribe to newsletter

Sign up for our newsletter and occasional updates.

The FAA has updated its standard for facilities and electronic equipment. StaticWorx meets all requirements for ESD flooring.

Flooring Products

We accept these major credit cards.

“I’m so glad we were able to find an attractive solution that didn’t leave us with some run-of-the-mill ugly disaster.”

Share This

Get in Touch

East Coast: 617-923-2000
Email: [email protected]

subscribe to newsletter

Sign up for our newsletter and occasional updates.

The FAA has updated its standard for facilities and electronic equipment. StaticWorx meets all requirements for ESD flooring.

Get in Touch

East Coast: 617-923-2000
Email: [email protected]

“I’m so glad we were able to find an attractive solution that didn’t leave us with some run-of-the-mill ugly disaster.”

Share This

subscribe to newsletter

Sign up for our newsletter and occasional updates.

The FAA has updated its standard for facilities and electronic equipment. StaticWorx meets all requirements for ESD flooring.

This site is protected by copyright and trademark laws under both United States and International law.
All rights reserved. © 2008-2023, StaticWorx® GroundSafe™ ESD Flooring. Privacy Policy