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Coating Matters | Film Split Defects

(Coating/Laminating)

June 28, 2015, ... of the web path). The inlet side of this nip point develops increased pressures. As the substrate and fluid exit the nip point, the diverging rolls develop low pressures. At this point of divergence between ...

Drytac Laminator Called Heavy-Duty Unit

(Coating/Laminating)

June 09, 2015, ... temperature to 248 deg F (120 deg C); large-diameter, non-stick silicone rollers; adjustable speed control to 20 fpm (6 mpm); a maximum nip opening of 2 in. (50.8 mm); and five auto-grip supply and take-up ...

Should Unwind Tension Be Lower Than Winding Tension?

(Web Handling)

March 26, 2015, ... torque and nip load. For differential or clutched winding, a handheld force gauge can measure the tension versus radius of rewind shafts and winding positions on the shaft to calibrate air pressure to ...

The Benefits of Ozone in Extrusion Laminating

(Tom’s Poly Ploys)

February 26, 2015, ... I founded in 1997.  The ozone applicator is the orange bar just above the blue nip roll, adjacent to the molten polymer.    Photo courtesy of Tom Bezigian   As described in the papers cited ...

E-Books

(Uncategorized)

February 21, 2015, ... This eBook by well-known expert Tim Walker outlines many common issues with tension control, roller design, nipped processes, web position control, wrinkle prevention, and winding. BAGS & POUCHES: ...

Do Your Homework to Solve Telescoping Roll Problems

(Web Handling)

December 03, 2014, ... winder information: Winder supplier, winder elevation diagram, winding tension control plan, winding process nip roller design (mechanism for loading, winding nip roller design: diameter, wall thickness, ...

Maxson Sheeter Reportedly Allows Higher Speeds

(News | New Products)

November 18, 2014, ... as it enters the overlap area, rather than nip pressure. The resulting action prevents stress marks from the stop roller and delivery belts while ensuring sheet packets are conveyed trouble-free to the ...

Static Beat | Solvent Coater Static Control for Insulating Webs

(Static-Beat)

November 05, 2014, ... system. When the web in Figure 2 exits the coating nip with high static charge, a spark may occur between the charged web and the nearest grounded, conducting object. If the nearest grounded object ...

Show Preview | Labelexpo Americas 2014 Enhances Focus on Package Printing

(Label/Tape)

August 04, 2014, ... nearly any press within the print zone with no press colors sacrificed. Also showing unwind and rewind solutions and standalone servo nip assembly with closed-loop tension control.     tesa tape ...

Converting Headaches? Get Relief at CPP EXPO's PFFC-Sponsored Technical Session

(Trade Shows)

July 13, 2014, ... dissipators 3. How to install static dissipators to control static at the source of corona treaters, nip rollers, and unwind rolls C15 How to Control Static to Prevent Fires Monday, September 29, 10:30 ...

Interfacial Dynamics

(Mark's Coating Matters)

June 16, 2014, ... simply fall off the substrate. While gravitational forces need to be considered, the mathematical functions point to surface tension, viscosity, and process speed as forces that can be manipulated to defy ...

Globe Trekking Adventures in Web Handling, Winding & Slitting

(Web Handling)

June 02, 2014, ... and proven remedies. Web handling fundamentals covered will include: web properties, tensioning, traction, nipping, guiding, spreading, and winding. Problems will be reviewed in the areas of web uniformity, ...

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

(Web Handling)

May 15, 2014, Web handling expert Tim Walker of TJWalker + Assoc. and author of "Web Lines" describes the function and benefits of a nipping roller at winding. I was just reviewing a lab coater line the other day. ...

Processing Tips to Prevent Gauge Bands - Part 4

(Tom’s Poly Ploys)

May 12, 2014, ... with polymer degradation.  This is an ideal situation for a DOE to determine the optimal loading level with other process conditions, such as nip roll pressure, rubber roll hardness, etc.  Don't be surprised ...

Web Lines | Why Is Winding Optimization Difficult?

(Web Handling)

April 21, 2014, ... some of your thickness profile variations. Nipping: Most winders need and have nips. Winding nips provide tensioning, lateral control, air management, and anti-wrinkle benefits. But nipping can be ...

Web Lines | War on Bagginess

(Web Handling)

February 26, 2014, ... winding model to predict interaction of roll geometry, material properties, winding process variables (tension, nip, speed, taper), and transverse direction thickness profile. The 3D winding model ...

Readers Choice | Top 10 New Products of 2013

(Coating/Laminating)

December 30, 2013, ... packs, and standup pouches. This pre-engineered line includes flexible packaging unwinder; corona treaters; extrusion laminator; gravure primer coater dryer; pull roll with nip; winder; company’s electrically ...

What Mechanisms Cause a Web to Shift Laterally?

(Web Handling)

October 07, 2013, ... web moves off centerline, there are a limited number of reasons this happens. 1. Roller misalignment 2. Roller diameter variations 3. Web bagginess 4. Nip pressure variations 5. External forces Mechanism ...

Web Lines | Winding Process Fundamentals, Pt. 4

(Web Lines)

September 23, 2013, ... above average diameters will have above average tension. Nipping will vary TD from both diameter variations and uneven nip loading. Lower than average diameter lanes will have below average nip load; above ...

LAB/PILOT/TECHNICAL FACILITIES DIRECTORY

(Uncategorized)

August 31, 2013, ... plastics LA | 1 laminator; 14 in. (356 mm) max. laminated width; 175 fpm (50 mpm) max. line speed; 2 winders, 1 nip drive, braked unwinders SU | full thickness range for film, foil, paper, and metals ...