Digital Magazine

Web Lines

Web Lines | Action Plan for CD Buckles, Part 3

Mechanisms, descriptions, and remedies for your cross direction buckles.

Web Lines | Action Plan for CD Buckles, Part 2

Mechanisms, descriptions, and remedies for your cross direction buckles.

Web Lines | Action Plan for CD Buckles, Part 1

Cross direction buckling defects have many names, but they all share one common mechanism.

Web Lines | How To Choose the Right Tabbing Tape

Tabbing tape needs to be strong enough to stick to the roll, but weak enough to break so the new roll’s bumped and bonded leading tail will break away from the unwinding roll.

Web Lines | Unwind Splice Reliability

To create reliable unwind flying bump splices, these 9 factors have to work together.

Web Lines | Action Plan for Baggy Webs

Bagginess is not easily measured, but here are some methods to compare low, moderate, and high levels of bagginess.

Web Lines | Air Bubbles in Your Laminate

Here are 7 solutions when laminate bubbles or uncoated area creates delamination at idler rollers

Web Lines | When Do Small Rollers and Cores Cause Defects?

Are you exerting excessive strain on your web?

Web Lines | Unwritten Rules, Part 2

Here are a couple more web handling rules Tim Walker keeps forgetting to tell you

Web Lines | Unwritten Rules, Now Written

Here are 3 web handling rules Tim Walker keeps forgetting to tell you

Should Unwind Tension Be Lower Than Winding Tension?

Once you've determined that you have a roll telescoping problem, here's how to solve it.

Web Lines | How To Create an MD Running Fold in a Wide Web

Web handling expert Tim Walker offers three options for this folding process

Does This Roll Contain Quality Web?

Measuring roll hardness is also like trying to figure out what is in a wrapped package. You are trying to guess what is in the wound roll's package without opening it.

Do Your Homework to Solve Telescoping Roll Problems

Answer this list of questions to identify the source of your telescoping roll problems.

All I Ever Needed to Know —I Learned in Elementary School

The Science Specialist at my son's school offered 5th graders a skills list that even consulting engineers can use.

The Importance of Running Centered

How important is it to run centered on anti-wrinkle/spreading rollers?

Web Lines | The Case of the Missing Pacer

How can a system with only two slipping torque elements control speed?

Globe Trekking Adventures in Web Handling, Winding & Slitting

Follow Tim Walker on his adventures as he treks the globe solving web handling, winding, and slitting problems in Japan, the UK, and back home in the good ol' USA.

Web Lines | Wrinkling?

Can we predict differences in wrinkle sensitivity of different products? Here are 3 simple tests.

Is There a Doorman at Your Winder or Do You Let Just Any Web Get In?

Web handling expert Tim Walker of TJWalker + Assoc. and author of "Web Lines" describes the function and benefits of a nipping roller at winding.

Web Lines | Why Is Winding Optimization Difficult?

Winding is hard work—hard on your brain. Are you ready to get your Ph.D. in web handling?

Do You Need a Roller That Is Chillin' and Groovy?

Web handling expert Timothy J. Walker of TJWalker+ Assoc. describes options for solving air lubrication of a big chilled or heated roller.

Web Lines | War on Bagginess

A program to reducing bagginess begins with quantifying it, reducing thickness variations, and minimizing winding stresses and strains.

Web Lines | The Case for Shorter (and Longer) Acceleration Times

Should you change the acceleration time on your slitter/rewinder? Web handling expert Tim Walker offers the pros and cons

Web Lines | How the Open Loop Torque Control Sets Winding Tension

There are many winding machines that do not use closed-loop tension control in the winding process. Here is how they work.

What Mechanisms Cause a Web to Shift Laterally?

Web Handling expert Tim Walker identifies the five culprits that cause a web to move off centerline.

Web Lines | Winding Process Fundamentals, Pt. 4

In Part 4 of this four-part series, web handling expert Tim Walker explains how TD variations in equipment or web properties affect roll structure

Web Lines | Curl Mechanics Pt. 2—Transverse Direction Curl

In Part 2 of this four-part series on curl, web handling expert Tim Walker tackles three common sources of TD curl.

Eliminating Boundary Layer Air During Winding

Eliminate boundary layer air  while winding rolls of film, in most cases, by using a lay-on roller. For coating and extrusion technology, vacuum boxes or electrostatic pinning can sometimes–though infrequently–be effective.

Web Lines | Curl Mechanics Pt. 1—Machine Direction Curl

In this first part of a four part series on curl, web handling expert Tim Walker discusses curl in coated and laminated products

Subscribe to PFFC's EClips Newsletter