Search
Now showing items 31-40 of 51
Predicting web wrinkles on rollers
(Oklahoma State University, 2009-06)
There are two levels of web instability in web lines. The first level of web instability is called web troughs. Web troughs are due to the instability of webs that occur in free web spans. Web troughs have been shown to ...
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, ...
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 ...
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, ...
Finite element analysis of winding nip mechanics
(Oklahoma State University, 2009-06)
Wound-on-Tension (WOT) is the tension in the outermost layer of a winding roll that is created due to the incoming web tension and the tension induced by the nip roller called Nip-Induced-Tension (NIT). This paper presents ...
Predicting the web length and layers in a wound roll
(Oklahoma State University, 2019-06)
The length of web in a wound roll is one mark of roll quality. The available web length in a roll is a concern for many who process webs and those who convert webs. There are algorithms that estimate the length of web and ...
Nonlinear orthotropic viscoelastic winding model
(Oklahoma State University, 1995-06)
A realistic and adaptive viscoelastic model for prediction of transient wound roll stress distributions is presented. The web material is taken to be orthotropic with a nonlinear radial creep compliance dependent upon ...
Importance of torque capacity in predicting crepe wrinkles and starring in wound rolls
(Oklahoma State University, 1995-06)
Roll models provide information about the radial stresses and circumferential stresses that exist in a wound roll of web material. A derived quantity that is available from the radial stress profile is the torque capacity. ...
Boundary conditions for lateral deformation of webs transiting rollers in roll-to-roll process machines
(Oklahoma State University, 2017-06)
The lateral deformations of webs in roll-to-roll (R2R) process machines can affect the quality of the manufacturing process. The lateral registration of the web in successive R2R processes can determine whether a product ...
Computing wound roll stresses based upon web surface characteristics
(Oklahoma State University, 1993-06)
Historically wound roll models have required the input of a radial modulus of elasticity. Heretofore this modulus has been measured using material testing systems which have shown the radial modulus to be dependent upon ...