Infra-Red Moisture Measurement on the Paper Machine

1970 ◽  
Vol 3 (2) ◽  
pp. T23-T29 ◽  
Author(s):  
Donald B. Scrivens ◽  
David W. Kent ◽  
Royston A. E. Sargeant
Keyword(s):  
Fixed Point ◽  
Paper Industry ◽  
Paper Machine ◽  
Calibration Technique ◽  
Moisture Measurement ◽  
Cent Moisture ◽  
Wide Range ◽  
Infra Red ◽  
Moisture Gauge

The basic criteria for development of a suitable per cent moisture gauge for paper are discussed and the paper industry requirements analysed. The theory of operation for the infra-red gauge is explained and the various components of the system described at length. Installation methods for fixed point and traversing mechanisms are set forth. The significance of the calibration technique being used is discussed. A wide range of current installations is described and the extension of applications on the paper machine suggested.

How to use alum with cationic dispersed rosin size

TAPPI Journal ◽  
2016 ◽  
Vol 15 (5) ◽  
pp. 331-335 ◽  
Author(s):  
LEBO XU ◽  
JEREMY MYERS ◽  
PETER HART
Keyword(s):  
Zeta Potential ◽  
Colloidal Particles ◽  
Streaming Potential ◽  
Excessive Amount ◽  
Paper Machine ◽  
Optimum Amount ◽  
Potential Measurement ◽  
Streaming Current ◽  
Wide Range ◽  
Laboratory Results

Retention of cationic dispersed rosin size was studied via turbidity measurements on stock filtrate with different alum and dispersed rosin size dosages. Stock charge characteristics were analyzed using both an analysis of charge demand determined via a streaming current detector and an evaluation of zeta potential of the fibers by streaming potential measurement. The results indicated that an optimum amount of alum existed such that good sizing retention was maintained throughout a wide range of dispersed rosin size dosages. However, when an excessive amount of alum was used and fines and colloidal particles were transitioned from anionic to cationic, the cationic size retention was reduced. Laboratory results were confirmed with a paper machine trial. All data suggested that a stock charge study was necessary to identify optimal alum dosage for a cationic dispersed rosin sizing program.

Application Of Cusum Chart In Control Of Paper Quality

GIS Business ◽  
2020 ◽  
Vol 14 (6) ◽  
pp. 1062-1069
Author(s):  
S.Ramesh ◽  
B.A.Vasu
Keyword(s):  
Process Parameters ◽  
Manufacturing Process ◽  
Paper Industry ◽  
Primary Data ◽  
Cusum Chart ◽  
Paper Machine ◽  
Statistical Control ◽  
Operating Characteristics ◽  
Small Shift

This paper is an attempt to assess if the manufacturing process of paper machine is in statistical control thereby improving the quality of paper being produced in a paper industry at the time of process itself. Quality is the foremost criteria for achieving the business target. Therefore, emphasis was made on controlling the quality of paper at the time of manufacturing process itself, rather than checking the finished lots at a later time.  This control on quality will help the industry deduct the small shift in the process parameters and modify the operating characteristics at the time of production itself rather than receiving complaints from customers at a later stage.  This paper describes controlling quality at the time of manufacture itself and helps the industry to concentrate on quality at low cost. The researcher has collected primary data at a leading paper industry during October, 2019.  Though X-bar and Range charges were primarily used, CUSUM charts were used to sense the minor shifts in manufacturing process, to explore the possibility of adjusting process parameters during manufacture of paper.

Peculiarities of Photorefractive Response in Planar Waveguides Fabricated by Combined Proton and Copper Exchange

1997 ◽  
Vol 06 (03) ◽  
pp. 321-331 ◽  
Author(s):  
Sergey Kostritskii
Keyword(s):  
Experimental Investigation ◽  
Photorefractive Effect ◽  
Planar Waveguides ◽  
Ionic Exchange ◽  
Wide Range ◽  
Infra Red ◽  
Anomalous Character ◽  
A New Technique ◽  
Fabrication Parameters ◽  
Copper Exchange

In this work a photorefractive effect in proton-exchanged planar waveguides on LiNbO 3 crystals is discussed. These waveguides are doped by copper with the aid of a new technique using the low-temperature ionic exchange. The experimental investigation has revealed the anomalous character of the photorefractive response in strongly doped waveguides. Photorefractive measurements are made over a wide range of H +, Cu + and Cu 2+ concentrations, altered by a seriesof oxidation treatments caused by back ionic exchange. Fabrication parameters allowing the realization of high photorefractive sensitivity either in visible or near infra-red ranges are identified.

scholarly journals Brief Review and Mathematical Modelling of Air Cushioned Pressurized Paper Machine Headbox

2018 ◽  
Vol 7 (3.4) ◽  
pp. 57 ◽  
Author(s):  
Parvesh Saini ◽  
Rajesh Kumar
Keyword(s):  
Mathematical Modelling ◽  
High Speed ◽  
Paper Industry ◽  
Paper Machine ◽  
Efficient Operation ◽  
Precise Control ◽  
Paper Machines ◽  
Day By Day ◽  
Paper Machine Headbox

Today, the requirement of high grade papers is increasing day by day. To cater the need of high quality papers, new high-speed paper machines are being developed constantly. The whole economy of a pulp and paper industry depends on the quality of paper produced, quality of paper depends on the efficient operation of the major part of paper industry – paper machine. Paper machine is the heart of paper industry and has many subsystems. One of the important subsystem of paper machine is Headbox.   To have the desired quality papers, efficient working of headbox is highly required. To have desired operation from headbox, its precise control is necessary. The precise modelling of headbox, leads to design of efficient controllers for its proper control to get the desired response. This paper presents the mathematical modelling of headbox along with a brief review of various research performed on headbox.  

Solvent effects on infra-red group frequencies

1960 ◽  
Vol 255 (1280) ◽  
pp. 22-32 ◽  
Keyword(s):  
Solvent Effects ◽  
Carbonyl Compounds ◽  
Relative Frequency ◽  
Frequency Shifts ◽  
Wide Range ◽  
Infra Red ◽  
Linear Plot

In previous publications we have shown that solvent effects on group frequencies can be studied conveniently by plotting the relative frequency shifts ∆ ν/ν of one solute in a series of solvents, directly against the corresponding values for some other (Bellamy, Hallam & Williams 1958). Thus, ∆ ν/ν the values for the NH stretching frequency of pyrrole yield a linear plot against the ∆ ν/ν values for any other X —H stretching absorption such as the O—H of methanol or the B—H of decaborane. These relations hold over a wide range of different solvents, and each X H compound has a characteristic slope when plotted in this way against a common standard. The slopes measure the relative proton donating powers of the solutes. Similar plots have been obtained for a large number of carbonyl compounds (Bellamy & Williams 1958). Here the pattern of solvent effects is altogether different from that given by X —H links as the dipole available for solvent association is reversed. The sensitivity of individual carbonyl compounds to solvent effects varies widely and seems to depend upon a number of different factors.

scholarly journals Infra-red fixed point structure characterising SUSY SU(5) symmetry breaking

1997 ◽  
Vol 393 (3-4) ◽  
pp. 349-354 ◽  
Author(s):  
B.C. Allanach ◽  
G. Amelino-Camelia ◽  
O. Philipsen
Keyword(s):  
Fixed Point ◽  
Symmetry Breaking ◽  
Infra Red

scholarly journals Hydrothermal sulfonation of palm empty fruit bunch carbon as solid acid catalyst and its hydrolysis catalytic activity

2020 ◽  
Author(s):  
Iryanti F. Nata ◽  
Chairul Irawan ◽  
Meilana D. Putra ◽  
Cheng-Kang Lee
Keyword(s):  
Catalytic Activity ◽  
Solid Acid ◽  
Solid Acid Catalyst ◽  
Acid Catalyst ◽  
Reducing Sugar ◽  
Empty Fruit Bunch ◽  
Wide Range ◽  
Infra Red ◽  
Ft Ir ◽  
Cassava Peel

Abstract The sulfonated carbon solid acid catalyst (C-SO3H) was successfully generated from palm empty fruit bunch (PEFB) carbon via hydrothermal sulfonation by addition of hydroxyethylsulfonic acid and citric acid. The C-SO3H was identified contain of 1.75 mmol/g of acidity and 40.2% of sulphur. The surface morphology of C-SO3H showed pores with diameters of 3-6 µm and crystalline index (CrI) of material was decreased to 63.8% due to changed structure become carbon. The surface area of carbon was increased significantly from 11.5 to 239.65 m2 g- 1 after hydrothermal treatment. The identification of functional groups of -SO3H, COOH and -OH were detected by Fourier Transform Infra-Red (FT-IR). The optimum catalytic activity of C-SO3H was achieved via hydrolysis reaction with 60.4% of total reducing sugar (TRS) yield. The both concentrations of C-SO3H and cassava peel starch are 5% (w v- 1) at 100 oC for 1 h. Stability of C-SO3H showed good performance for 4th repeated used; it showed insignificant of activity that decreased only of 6%. Thus, the C-SO3H is a candidate for green and potential sulfonated solid acid catalyst for wide range applications.

scholarly journals Hydrothermal Sulfonation of Palm Empty Fruit Bunch Carbon as Solid Acid Catalyst and Its Hydrolysis Catalytic Activity

2020 ◽  
Author(s):  
Iryanti F. Nata ◽  
Chairul Irawan ◽  
Meilana D. Putra ◽  
Cheng-Kang Lee
Keyword(s):  
Catalytic Activity ◽  
Solid Acid ◽  
Solid Acid Catalyst ◽  
Acid Catalyst ◽  
Reducing Sugar ◽  
Empty Fruit Bunch ◽  
Wide Range ◽  
Infra Red ◽  
Ft Ir ◽  
Cassava Peel

Abstract The sulfonated carbon solid acid catalyst (C-SO3H) was successfully generated from palm empty fruit bunch (PEFB) carbon via hydrothermal sulfonation by addition of hydroxyethylsulfonic acid and citric acid. The C-SO3H was identified contain of 1.75 mmol/g of acidity and 40.2% of sulphur. The surface morphology of C-SO3H showed pores with diameters of 3-6 µm and crystalline index (CrI) of material was decreased to 63.8% due to changed structure become carbon. The surface area of carbon was increased significantly from 11.5 to 239.65 m2g-1 after hydrothermal treatment. The identification of functional groups of -SO3H, COOH and -OH were detected by Fourier Transform Infra-Red (FT-IR). The optimum catalytic activity of C-SO3H was achieved via hydrolysis reaction with 60.4% of total reducing sugar (TRS) yield. The both concentrations of C-SO3H and cassava peel starch is 5% at 100 oC for 1 h. Stability of C-SO3H showed good performance for 4th repeated used; it showed insignificant of activity that decreased only of 6%. Thus, the C-SO3H is a candidate for green and potential sulfonated solid acid catalyst for wide range applications.

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