Browsing OSU - International Conference on Web Handling by Title
Now showing items 410-429 of 429
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Winding of plastic barrier films
(Oklahoma State University, 2013-06)High quality plastic films are produced using the cast or blown film extrusion processes. Several kinds of resins are coextruded in a film of up to 11 layers to generate the best technical properties at competitive costs. ... -
Winding plastic films: Experimental study of squeeze film flow between one smooth surface and one "rough" surface
(Oklahoma State University, 1997-06)The present paper is concerned with experiments which consist in squeezing an air layer between a rigid, smooth surface and a flexible, rough one. -
Winding problems with rotogravure jumbo-rolls
(Oklahoma State University, 1991-05)The production and conversion of jumbo rolls presents a challenge to all involved in the production process. This presentation shows that as reel dimensions continue to increase, limits are being reached with regard to ... -
Winding process calibration and comparison
(Oklahoma State University, 2015-06) -
Wireless monitoring of internal wound roll pressures
(Oklahoma State University, 2013-06)Winding is a dynamic process. The final roll is the product of all that happens during the winding process from roll start to final cutoff. Nearly all roll measurement methods try to characterize a roll's structure after ... -
Wound roll generated unstable vibration
(Oklahoma State University, 2003-06)Nip contact between the wound roll and the winding drum, rider roll or some other nip roller may cause that the wound roll is deformed into a convex polygon. This deformation process is accompanied with a very strong ... -
Wound roll generated unstable vibration on a two-drum winder
(Oklahoma State University, 2005-06)Nip contact between the paper roll, winding drum and rider roll or some other nip roller may cause that the wound roll is deformed into a convex polygon. This deformation process is accompanied with a strong vibration. The ... -
Wound roll stress analysis including air entrainment and the formation of roll defects
(Oklahoma State University, 1995-06)Numerous procedures have been developed to determine the stresses inside wound rolls of film. These typically use factors such as winding tension, film thickness and film properties to calculate the stresses. The calculation ... -
Wound roll stresses from displacement measurements
(Oklahoma State University, 1991-05)Previous wound roll models required a known Wound-In-Stress boundary condition that is easily obtainable only for the restrictive case of pure center winding with measured incoming web tension and caliper. A new boundary ... -
Wound roll structures and practical applications
(Oklahoma State University, 2019-06)Winding is an integral process in the manufacturing and converting of nearly all web materials such as paper, film, tissue, nonwovens, aluminum and steel. Wound rolls are the most convenient, economical, and most prevalent ... -
Wound-in-tension in a non-woven web
(Oklahoma State University, 2005-06)Literature on wound roll structure of non-homogeneous webs is scarce. Experimental and analytical research on wound roll structure of homogeneous materials such as plastic films and paper has been reported extensively, ... -
Wound-on-tension for two drum winders
(Oklahoma State University, 2003-06)The two drum winder remains to be a high productivity winder for rewinding some paper and nonwoven webs at very high speeds. Winding models of varied capabilities exist for center winders, center winders with rider rollers, ... -
Wrinkle dependency on web roller slip
(Oklahoma State University, 1995-06)The shear forces in a web introduced from an untrammed roller create wrinkles that are affected by web twisting or slipping on the upstream roller. The web span bounded between the untrammed and upstream rollers behaves ... -
Wrinkle initiation and development in heated webs on drums
(Oklahoma State University, 2013-06)Wrinkles often occur in webs heated on drums and rollers. Anecdotal evidence from vacuum metalizers suggests that wrinkles are initiated by small grit particles or surface imperfections that lift the web off the drum. An ... -
Wrinkle-free conveyance in nips
(Oklahoma State University, 2005-06)Wrinkling in nips with ultra-thin webs is empirically studied. In web converting, nips are used for tension isolation drives, gravure coaters, prevention of air entrainment on rollers and winding rolls, calendaring, ... -
Wrinkling mechanisms of webs with spatially varying material properties
(Oklahoma State University, 2017-06)Webs often include variation in caliper or modulus of elasticity as a result of manufacturing variation. Light-weight nonwoven webs are especially prone to these issues because the variation is proportionally more, relative ... -
Wrinkling of foils
(Oklahoma State University, 2011-06)Aluminum and copper metal webs less than 150 microns (6-mils) are considered foils. Demand for aluminum and copper foils are growing, driven by growing markets for flexible electronics, flat panel displays, lithium batteries, ... -
Wrinkling of webs due to twist
(Oklahoma State University, 1999-06)Webs are often required to endure twisting in web process machinery. There is a limit to the degree to which the web can be twisted prior to wrinkling. The objective of this publication is to document a closed form technique ... -
Wrinkling of webs on rollers and drums
(Oklahoma State University, 2005-06)Wrinkles are frequently observed in thin webs wrapping rollers, winding cores, and drums in vacuum coaters. They are the buckling response of the web to compressive deformation in the transverse direction (TD), which may ... -
Wrinkling of wide webs
(Oklahoma State University, 2011-06)Wrinkling remains one of the top causes of converting process waste. Though wrinkles created by roller misalignment and web bending (shear wrinkles) are well-understood, nearly all the published research and modeling has ...