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- Web Lines | Winding Process Fundamentals, Pt. 3
- (Web Handling)
- May 08, 2013, ... outer roll layers; compression of surface roughness features of the product; density increases in the product; air escaping the roll; and lateral flow of any layers (such as adhesive layers in sticky tape ...
- Basics: What Are the Key Process Variables of Winding?
- (Web Handling)
- May 02, 2013, ... with two drum surface winders. Tension is the web tension upstream of the winder. Nip is the normal force between the winding roll and the surface drums. But what is torque? Torque is the ft-lbs (or ...
- REM Mfg. Slitter Processes Narrow Webs
- (Narrow Web)
- April 07, 2013, ... center surface rewinding for processing webs at speeds to 1,000 fpm with tension ranges down to 0.25 PLI. Slit widths are ¼ inch minimum. Available with rewind diameters to 24 in. Programmed differential ...
- Bringing Theory into Focus
- (Coating/Laminating)
- April 04, 2013, ... (rheology, viscosity, surface tension, etc.). But what is important? What can you use daily as an applications individual in the fluid coating world? So let’s start with the most important concept to ...
- Davis-Standard Upgrades Coating & Pelletizing Lab
- (Coating)
- February 22, 2013, ... capabilities with center, surface center, and slip core winding modes as well as in-line shear slitting. The liquid coating lines are equipped for trials using different coater arrangements, offering customers ...
- Web Lines | Winding Process Fundamentals, Pt. 2
- (Technical Reports)
- February 18, 2013, ... factor of both nip roller radius and winding roll radius). To wind a roll with constant entrained air per layer (with a goal of controlling entrained air to less than the surface roughness of the product), ...
- Show Preview | ICE USA 2013
- (Trends/Management)
- February 04, 2013, ... the film. Allows 100% coating coverage for irregular surfaces such as textured foils. Applies coat weights as low as 1 GSM, dependent on adhesive, and provides precise accuracy for a cross web distribution ...
- Web Lines | Winding Process Fundamentals, Pt. 1
- (Technical Reports)
- January 13, 2013, ... function of two variables: center torque and surface nip load. Understanding how applied center torque (in force x radius) becomes tension is easy. Torques are a force times a distance. Reversing this ...
- The Role of Energy in Coating
- (Coating/Laminating)
- January 09, 2013, ... many factors come into play – chemistry of the fluid, surface tension of the substrate, curing conditions, slitting requirements, tension control of the web, etc… All these factors are interactive and ...
- Static Beat | High Static on Unwinding Rolls
- (Static-Beat)
- October 30, 2012, ... polar charge is positive charge on one surface of the web and an equal amount of negative charge on the other surface. To see what is going on, let’s go back to the operation where the roll is wound ...
- Web Handling Q&A on Lateral Web Movement
- (Web Handling)
- October 18, 2012, ... to how a web tracks if its angle of approach is not parallel to the roller's surface vectors. The asymmetric baggy web presents a slight curvature at the point of contact leading to the next portion of ...
- Web Lines | Why Avoid Nips?
- (Web Handling)
- September 24, 2012, ... created by gravity. Similarly, the web wrapped around a roller has tension pulling it down to the roller’s surface creating friction without nipping. More tension, more wrap angle, and higher coefficient ...
- Winding Technology | Now Directly in the Drive
- (Controls)
- September 19, 2012, ... a surface winder, but is the more effective of the two, as it is a much simpler version, at least from a mechanical perspective. The standard application supports various control techniques, including ...
- WebHandlersQuiz #17: Winding at Constant Torque
- (Web Handling)
- July 26, 2012, ... distance (e.g., lbs-in., N-m) to the center of the winding roll. This torque is converted into tension based on the distance, which is the radius, to the outside surface of the winding roll. The actual ...
- Coating Matters | Free Span Coating
- (Coating/Laminating)
- July 16, 2012, ... the only surface the fluid from the die connects with is the substrate. This reduces the variation in the roll as a player in the coating process. Free span coating also is referred to as tensioned-web-over-slot-die ...
- Labelexpo Americas | Mission Possible
- (Label/Tape)
- July 12, 2012, ... brand owners to enhance point-of-sale impact. Other new technologies on display will include a surface-printable OPP film delivering a consistent and attractive metallic appearance and high-speed press ...
- Static Quiz - Winding Roll - Answer
- (Kelly on Static)
- April 22, 2012, ... positive static on the top surface of the web. Static bar SB1 neutralizes the web by depositing negative static on the bottom surface of the web. While ESPAN is zero indicating that the charges on the ...
- drupa Preview | Exhibitors Launch New Products
- (Carton Box)
- March 08, 2012, ... formulated specifically for highest SID combined with excellent dot gain characteristics. True next-generation plates with re-engineered print surface technology, the DuPont Cyrel solvent-process DSP and ...
- Overlaminate Film from Argotec is Protective
- (Substrates)
- February 29, 2012, ... lineal yds. It is extrusion coated onto a high-gloss PET carrier that enables the film to be wound and unwound without the need for TPU processing agents. The result is a film with consistent surface tension ...
- WHQuiz Answer #5 - Draw Control Pros/Cons
- (Web Handling)
- February 22, 2012, ... webs. Draw control is dependent on relative surface speeds of input and output rollers, making them sensitive to roller wear. If speed ratios are set too high, microslip will occur. Draw control has ...