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Web Guiding | Lateral Motion Causes

(Web Lines)

March 31, 2010, Where is your web? In the machine direction, hopefully, it is continuously running between your upstream and downstream processes. But where is it laterally? Where is your web? In the machine direction, ...

Static Beat: How To Measure Static

(Static Elimination)

February 28, 2010, ... static. Electrostatic fieldmeters are the workhorse for diagnosing static problems. Coulomb meters are used with Faraday cups to measure charge on small objects or film samples. Non-contacting electrostatic ...

Get a Grip on Your Web

(Tension)

October 31, 2009, ... in nip rollers or “S” wraps. Vacuum rollers are designed to pull the web into intimate contact with the roll, preventing web slippage in either direction. The result is a highly effective web control ...

The Great Span Length Debate | Part 2

(Web Lines)

March 31, 2009, Last month, we debated roller spacing (a.k.a. web span length) relative to cost, safety, out-of-plane deviations from gravity, bagginess, and misalignment. Let's continue the debate. Here a roller, there ...

Crowning Benefits

(Web Handling: Main)

February 28, 2009, ... Special expertise is in core and end-use application engineering. Matt Menges can be reached at 847-487-8877. (Contact the company for the complete Crowned Roller Report at www.MengesRoller.com). The ...

How Much Misalignment Is Trouble?

(Web Lines)

January 31, 2009, Shear wrinkles are the most common wrinkle mechanism, forming a diagonal crease and appearing to walk across rollers like an inch worm. The way to create Shear wrinkles are the most common wrinkle mechanism, ...

What's New Product

(New Products)

November 30, 2008, ... a new high-temperature epoxy and mounted level with the surface so they are in direct contact with the plates to hold them securely in place. Epoxy is formulated to handle temperatures as high as 400 def ...

Who's Driving This Nip

(Web Lines)

November 30, 2008, ... is insignificant, so surface speed is independent of nip load. The rubber roller is driven by either the steel roller contact outside the web (for thin webs) or through the product (for thicker webs). ...

Shifty Answers to Nip-Induced Tracking

(Web Lines)

October 31, 2008, Nipping rollers are used in many value-adding processes in web converting roll coating, laminating, embossing, calendering, high-speed winding, and more. Nipping rollers are used in many value-adding processes ...

Web Coating: Process Characterization

(Coating/Laminating)

October 31, 2008, ... pH, particle size, purity; Viscosity, surface tension, and contact angle; Special performance properties; Correct filter type and size — monitoring filter pressure to ensure filter is functional; Storage ...

Lightfastness in Package Printing

(Process Management)

August 31, 2008, When you take into account the time and effort spent on supplying packaging with precise colors, it follows the expectation that these colors should stay the same during the product use cycle When you ...

FFTA Annual Forum Speakers Score High Marks

(News | New Products)

August 05, 2008, ... Technical Assn. (FFTA) Forum in Dallas, TX. Tony Donato, product development engineer at Harper, presented at the Flexo 101 session, addressing the relationship of doctor blade contact angle to vibration, ...

Idler Roller Bearings: Living the Good Long Life?

(Web Lines)

June 30, 2008, ... will have longer expected life but also more friction, especially in greased, contact seal bearings. Some idlers eliminate the need for large inner diameters by eliminating the through shaft. A small ...

Web Lines: The Spin on Idler Roller Testing

(Web Lines)

May 31, 2008, ... spring scale and measure the surface force required to move the roller at creep speed. At-speed testing answers the question, “Are your idler rollers turning at line speed?” You can use a contact or ...

The Flexo Process: Be Careful

(Flexography)

April 30, 2008, ... waste. Process improvement expert David Argent has 30+ years of experience in process analysis with particular emphasis on ink and coating design and performance. Contact him at 636-391-8180; This email address is being protected from spambots. You need JavaScript enabled to view it.. ...

A Recipe for Scratching

(Web Handling)

April 30, 2008, ... are five prerequisites to create a scratch or abrasive wear. All five are required to create the scratch. Let's review them. Contact The web must be touching something — roller, any nonmoving equipment, ...

What's New Product

(New Products)

February 29, 2008, ... Concepts | 888-782-5233 | www.flexoconcepts.com PFFC-ASAP 420 Spray Systems Need No Contact Spray systems apply water, chemical solutions, or powder onto webs in a “contactless” manner. For liquids, ...

Property Control

(Coating/Laminating)

January 31, 2008, ... It can be measured by contact angle measurements using a goniometer. There are also standard solutions that can be used to estimate substrate surface tension easily. In addition, the surface tension ...

What's Ne

(Magazine)

November 30, 2006, ... wafer, non-static-sensitive products, vacuum packaging, and nitrogen flush. May be used in direct contact with products or as an overwrap, and may be heat-sealed. PFFC-ASAP 413 Control Static ...

What's Ne

(Magazine)

August 31, 2006, ... small as 2 in. Said to maintain tight contact between tape and plate. Setup is fast with smooth surfaces for cleaner print quality and high productivity, company says. Available in a choice of constructions ...