Search

Fun with Force Gauges

(Magazine)

February 28, 2004, ... how much you weigh; it simply shows a number proportional to how much your weight compresses the springs. A handheld spring scale is the same, with the ability to measure force of compression or elongation ...

Adhesion of Coatings to Aluminum Foil

(The Place)

August 31, 2003, ... In principle, precipitations become finer and more homogeneous in strip casting. Some special foils or foil alloys exhibiting extraordinarily high tensile strength or elongation are manufactured using ...

Pay Attention to Tension

(Archive)

August 31, 2003, ... term “tension isolation” often is misused. Yes, the driven roller friction prevents tension shocks from surging downstream. However, friction does not prevent the web strain — the elongation from tension ...

Winding Better Rolls

(Archive)

May 31, 2003, ... coefficient of friction (or rug to floor friction) determines how much elongation or tensioning occurs for a given winding nip load. Q: Is wound-in tension from a winding nip a benefit? A: It may be ...

Fit for Use

(Materials)

April 30, 2003, ... that has been stretched in manufacture — for example, the difference in elongation and yield strength in cast (soft and weak) and oriented (hard and strong) PP — while the difference between oriented PET ...

PSTC 2002-03 Tape Products Directory Available

(Tapes)

January 02, 2003, ... PSTC test-methods procedures; the test methods for tensile strength, adhesion, thickness, and elongation also are included in the back of the directory, which includes an indexing system that classifies ...

Coating and Laminating Special Report

(Archive)

February 28, 2002, ... tensions can cause excessive elongation, as can excessive tension at lower temperatures. Also, HDPE film does not have the level of thickness uniformity required for precise coating applications. Thicker ...

The Influence of Die Design and Extensional Rheology on the Onset of Wave Interfacial Instabilities in Coextrusion Flows

(Magazine)

December 31, 2001, ... and elongation stress jump at the point of merging reduce the possibility for interfacial instabilities. In general, instability is a time-dependent phenomenon. To develop and use a numerical code for ...

MD Wrinkle Formation Causes and Cures

(Magazine)

October 31, 2001, ... as it passes under the lay-on roll (see figure). Elongation over the gauge bands produces a slightly greater film width between the gauge band areas than is necessary to span the distance. This increased ...

Materials

(Magazine)

September 30, 2001, ... tape with excellent elongation properties for edge protection of paper and board rolls; #7216 Butterfly die-cut format for securing the top layer of paper before the flying splice; and #51913 for manual ...

More Causes, More Cures For Web Scratches

(Magazine)

July 31, 2001, ... may result in these types of webs if they are under high tension (with measurable elongation) by a driven roller, even though the roller is very accurately speed controlled. There are other sources ...

A Proposal for Spreading Base Web During Melt Extrusion

(Magazine)

March 31, 2001, ... pneumatically so they would engage the base web edges automatically or manually. The spreading angle should be remotely adjustable so the operator could optimize the amount of base web TD elongation.  ...

Web Handling...Making a Slitter/Winder Upgrade Work for You

(Magazine)

March 31, 2001, ... of Elasticity The modulus of elasticity—the ratio of web tension divided by web elongation in the elastic region of the product(s)—is an important parameter for calculating tension increases in the web. ...

Polyester Film Sourcing: Tips to Improve the Bottom Line

(Magazine)

November 30, 2000, ... factors can influence purchasing the correct polyester film: gauge; width; core size; roll size; clarity level (haze); coefficient of friction (COF); elongation; tensile strength; shrinkage, both machine ...

The Case Against Oxidation as a Primary Factor for Bonding Acid Copolymers to Foil

(Magazine)

November 30, 2000, ... the percentage of elongation of the coating. This suggests that stress and orientation may play a role. Oxidation of LDPE and acid copolymers occurs under typical extrusion coating processing conditions. ...

A Glossary of Descriptive TermsSecond Installment

(Magazine)

September 30, 2000, ... The control system uses this signal to move the web back to the machine centerline. Elastic limit : The point of elongation that a web material obtains under tension where it will not return to the ...

What's New in Narrow We

(Magazine)

August 31, 2000, ...  The TT-1500 tensile tester is described as an economical, precision testing instrument for the tape, label, and converting industries. It can perform unwind, tensile, elongation, tack, lap shear, ...

Partnering launches future growth in laminations

(Magazine)

August 31, 1996, ... and samples are taken to test for tensile strength, elongation, yield, thickness, etc., during production). Once the conditions are met, explains Silva, "statistical studies indicate there is very little ...