The situation on the cross direction control for paper machines.

Non-woven materials are widely used for the manufacture of disposable medical clothing and underwear. Radiation is widely used to sterilize single-use medical devices. The paper analyzes the effect of ionizing radiation at absorbed doses of 0-60 kGy on the stress-strain properties of medical non-woven spanmelt material based on polypropylene obtained by blow-molding technology. It has been established that ionizing radiation significantly reduces the breaking load and elongation in the machine and cross directions of the web. For this type of material, the most critical is the decrease in strength in the cross direction of the web, primarily because the level of strength in the cross direction of spanmelt materials is generally low. Sterilization by ionizing radiation further reduces strength and leads to the fact that non-woven materials irradiated with an absorbed dose of 50-60 kGy are close to unacceptable values in accordance with the requirements of EN 13975-2011.

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Study on the Uniform Distributed Mechanics of Ink Droplet in Inkjet Printing Equipment

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.236-238.1505 ◽

2011 ◽

Vol 236-238 ◽

pp. 1505-1507

Author(s):

Qi Feng Chen ◽

Shi Lin Yuan ◽

Guang Xue Chen ◽

Bao Lin Tang ◽

Jing Lei Tai

Keyword(s):

Theoretical Calculation ◽

Inkjet Printing ◽

Testing Equipment ◽

Cross Direction ◽

Uniform Velocity ◽

New Type ◽

Printing System ◽

The Cross

This paper studied on the hydrokinetics and uniform distributed mechanics of supplying ink pressure for the inkjet printing system based on the, and the advanced testing equipment. According to the analysis of theoretical calculation and CFD, we designed a new type of equipment for supplying ink, including the structure of the transition pipe. This supplying ink equipment could make the ink droplets distribute under the equal pressure on the cross direction. The experiments showed that this new supplying ink equipment could make the ink droplets distribute under the equal pressure and uniform velocity on the cross direction, so it greatly improved the imaging effects for the inkjet printing system.

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Basis Weight Uniformity of Lightly Needled Hydroentangled Cotton and Cotton Blend Webs

Journal of Engineered Fibers and Fabrics ◽

10.1177/155892500600100104 ◽

2006 ◽

Vol 1 (1) ◽

pp. 155892500600100 ◽

Cited By ~ 1

Author(s):

D.V. Parikh ◽

Randall R. Bresee ◽

Navzar D. Sachinvala ◽

Legrand Crook ◽

U. Muenstermann ◽

...

Keyword(s):

Low Temperature ◽

Machine Direction ◽

Cross Direction ◽

Blend Composition ◽

The Cross

New nonwoven products containing cotton and Lyocell (Trademarked, Tencel), low temperature thermal-bondable bicomponent olefin/polyester, or comber noils were developed using needlepunching and spunlacing (hydroentanglement). Webs containing five different blends were prepared by either light needlepunching, or light needlepunching followed by hydroentangling. We acquired detailed basis weight uniformity measurements to learn about processing and the influence of fiber blend composition on web uniformity. Basis weight uniformity was evaluated without regard to web direction (“Total” uniformity), along the machine direction (MD uniformity) and across the cross direction (CD uniformity) at numerous size resolutions. We observed that blending manufactured fibers (either Tencel or olefin/polyester) with bleached cotton and comber noil substantially improved basis weight uniformity of both types of nonwovens. We also observed that subjecting needled webs to hydroentangling significantly improved Total and MD uniformities.

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A Simulation Study of the Moisture Cross-direction Control Problem

IFAC Proceedings Volumes ◽

10.1016/s1474-6670(17)55565-2 ◽

1987 ◽

Vol 20 (13) ◽

pp. 59-64

Author(s):

C. Lindeborg

Keyword(s):

Control Problem ◽

Simulation Study ◽

Cross Direction ◽

Direction Control

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New techniques for cross direction moisture control on paper machines using infrared radiation.

JAPAN TAPPI JOURNAL ◽

10.2524/jtappij.39.841 ◽

1985 ◽

Vol 39 (9) ◽

pp. 841-845

Author(s):

John D. Higham

Keyword(s):

Infrared Radiation ◽

New Techniques ◽

Moisture Control ◽

Cross Direction ◽

Paper Machines

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Distributed Cross-Direction Control System Based on CAN-Bus

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.705.345 ◽

2014 ◽

Vol 705 ◽

pp. 345-349

Author(s):

Xian Cheng Shi ◽

Yu Cheng Feng ◽

Jin Song Zeng ◽

Ke Fu Chen

Keyword(s):

Control System ◽

Large Scale ◽

Can Bus ◽

Monitoring Station ◽

Paper Machine ◽

Practical Applications ◽

Cross Direction ◽

Direction Control ◽

Opc Technology ◽

And Control

A distributed cross-direction control system based on CAN-bus was designed to solve the large-scale cross-direction control problem for paper machine. Multiple Master-Slave CAN networks were constructed in parallel to coordinate and control multiple array actuators, and the Ethernet/CAN converter was used to connect the monitoring station with the field intelligent actuators. The monitoring station accesses measured data and field data via OPC technology. A CAN application layer protocol and corresponding underlying communication software were designed according to the characteristics of the cross-direction control processes. Finally, the feasibility and reliability of the system were verified with practical applications.

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Coat weight control in bent blade mode

TAPPI Journal ◽

10.32964/tj12.5.31 ◽

2013 ◽

Vol 12 (5) ◽

pp. 31-38

Author(s):

STIG RENVALL ◽

STEFAN KUNI

Keyword(s):

High Speed ◽

Weight Control ◽

Operating Mode ◽

Mechanical Force ◽

Cross Direction ◽

Dynamic Forces ◽

Blade Tip ◽

The Cross ◽

Physical Phenomena ◽

Blade Coating

Bent blade metering is the most common method used in board coating. As board machine speeds today have increased, new requirements have been set on blade geometry and accuracy of blade adjustments. A good understanding of the blade parameters and physical phenomena around the blade tip area is, therefore, necessary. Automatic coat weight profile adjustment using feedback from the coat weight measurement system is a great tool to improve the cross-direction coating uniformity and reel condition. In bent blade coating, however, the parameters for adjusting the cross-direction profilers need to be modified from those used in stiff blade coating. At high board coating speeds with bent blade, good coat weight control will require tuning of the blade parameters. To be able to reach a given coat weight at a high speed with a low tip angle, a high mechanical force is needed to control the high dynamic forces that are created in the blade tip area. The mechanical force can be increased either with a thicker blade or with a shorter free stick-out (i.e., shorter distance between the blade support bar and the blade tip). A higher tip angle can be used to decrease the dynamic forces to keep the coat weight in target; however, coating coverage and uniformity of the coating layer will then be reduced. Furthermore, blade wear is more severe at higher tip angles. For cross-direction profiling, a shorter free stick-out is suggested as a better approach than use of a thicker blade. The coat weight profile response and accuracy improves with a shorter stick-out as thinner blade with more flexibility can be used. Three alternative coat weight control methods for bent blade operation are discussed: blade load adjustment, beam angle adjustment, and load adjustment at constant tip angle. For effective coat weight cross-direction controls, the blade operating mode and parameters need to be chosen in accordance with the speed and coat weight range at which the coater is operating.

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