The effect of zeolite on inkjet coated paper surface properties and deinking

2020 ◽  
Vol 35 (3) ◽  
pp. 432-439
Author(s):  
Arif Ozcan ◽  
Dogan Tutak
Keyword(s):  
Surface Properties ◽  
Surface Coating ◽  
Kaolin Clay ◽  
High Grade ◽  
Coating Properties ◽  
Recycling Process ◽  
Paper Surface ◽  
Coated Papers ◽  
Inkjet Printer ◽  
Better Than

AbstractCoatings are generally applied for opacity, smoothness and gloss on the paper surface. Pigments such as CaCO3, Kaolin-Clay and Zeolite are used, and natural or synthetic binders are used. In this study, coatings using the CaCO3, Kaolin-Clay and Zeolite pigments on 80 gr/m2 high grade papers were made. PVOH was used as binder. Following coating, papers were processed through supercalendering and printed with inkjet printer. Using INGEDE method 11p. recycling process printed papers were deinked. The optical properties of the recycled papers obtained after the deinking treatment, were compared with the unprinted papers. At the end of the study, the effect of coating on paper surface and the recycling performances of the inkjet printed papers were revealed. It was determined that the papers in which zeolite was used as a pigment were better, in terms of both surface properties and recycling performance when surface properties and recycling performance of coated papers were examined. When all the results were compared, it was found that the performances of coatings for which zeolite was used were much better than coatings such as CaCO3 and Kaolin-Clay, both in terms of surface coating properties such as opacity, roughness and gloss and recycling results such as brightness.

Estimating ink mileage of dry toners in electrophotography

TAPPI Journal ◽  
2013 ◽  
Vol 12 (3) ◽  
pp. 9-14
Author(s):  
RENMEI XU ◽  
CELESTE M. CALKINS
Keyword(s):  
Experimental Data ◽  
Curve Fitting ◽  
Graphite Furnace ◽  
Atomic Absorption Spectrometer ◽  
Density Region ◽  
Coated Papers ◽  
Graphite Furnace Atomic Absorption ◽  
S Model ◽  
Better Than ◽  
Film Weight

This work investigates the ink mileage of dry toners in electrophotography (EP). Four different substrates were printed on a dry-toner color production Xerox iGen3 EP press. The print layout contained patches with different cyan, magenta, yellow, and black tonal values from 10% to 100%. Toner amounts on cyan patches were measured using an analytical method. Printed patches and unprinted paper samples, as well as dry toners, were dissolved in concentrated nitric acid. The copper concentrations in the dissolved solutions were analyzed by a Zeeman graphite furnace atomic absorption spectrometer. Analytical results were calculated to determine the toner amounts on paper for different tonal values. Their corresponding reflection densities were also measured. All data were plotted with OriginPro® 8 software, and four mathematical models were used for curve fitting. It was found that the C-S model fitted the experimental data of the two uncoated papers better than the other three models. None of the four models fitted the experimental data of the two coated papers, while the linear model was found to fit the data well. Linear fitting was the best in the practical density region for the two coated papers. Ink mileage curves obtained from curve fitting were used to estimate how much ink was required to achieve a target density for each paper; hence, the ink mileage was calculated. The highest ink mileage was 3.39 times the lowest ink mileage. The rougher the paper surface, the higher the requirement for ink film weight, and the lower ink mileage. No correlation was found between ink mileage and paper porosity.

The use of hollow sphere pigments as strength additives in paper and paperboard coatings—Part 1: The predictive nature of packing models on coating properties

TAPPI Journal ◽  
2020 ◽  
Vol 19 (11) ◽  
pp. 585-593
Author(s):  
ETHAN GLOR ◽  
BRIAN EINSLA ◽  
JOHN ROPER ◽  
JIAN YANG ◽  
VALERIY GINZBURG
Keyword(s):  
Particle Size ◽  
Hollow Sphere ◽  
Particle Packing ◽  
Particle Sizes ◽  
Coating Properties ◽  
Ideal System ◽  
Thermal Paper ◽  
Effect Of Particle Size ◽  
Low Levels ◽  
Better Than

Hollow sphere pigments (HSPs) are widely used at low levels in coated paper to increase coating bulk and to provide gloss to the final sheet. However, HSPs also provide an ideal system through which one can examine the effect of pigment size and particle packing within a coating due to their unimodal and tunable particle sizes. The work presented in Part 1 and Part 2 of this study will discuss the use of blends of traditional inorganic pigments and HSPs in coating formulations across a variety of applications for improved coating strength. Part 1 of this study focuses on the theory of bimodal spherical packing and demonstrates the predictive nature of packing models on the properties of coating systems containing HSPs of two different sizes. This study also examines conditions where the model fails by examining the effect of particle size on coating strength in sytems like thermal paper basecoats where the non-HSP component has a broad particle size distribution, and how these surprising trends can be used to generate better-than-expected thermal printing performance in systems with low HSP/clay ratios. Part 2 of this study focuses on the incorporation of HSPs of different particle sizes into paperboard formulations to affect coating strength and opacity.

Papanicolaou Tests With Mixed High-Grade and Low-Grade Squamous Intraepithelial Lesion Features: Distinct Performance in the College of American Pathologists Interlaboratory Comparison Program in Cervicovaginal Cytopathology

2006 ◽  
Vol 130 (4) ◽  
pp. 456-459
Author(s):  
Andrew A. Renshaw ◽  
Dina R. Mody ◽  
Patricia Styer ◽  
Mary Schwartz ◽  
Barbara Ducatman ◽  
...  
Keyword(s):  
Interlaboratory Comparison ◽  
Low Grade ◽  
High Grade ◽  
Squamous Intraepithelial Lesion ◽  
Performance Trends ◽  
Mixed Features ◽  
Intraepithelial Lesion ◽  
Slide Type ◽  
Pure Versus ◽  
Better Than

Abstract Context.—Previous studies have shown that in gynecologic cytology, cases of low-grade squamous intraepithelial lesion (LSIL) and high-grade squamous intraepithelial lesion (HSIL) perform differently on interpretive review. The performance of cases with mixed LSIL and HSIL features is unknown. Objective.—To compare the performance of gynecologic cytology cases of “pure” LSIL and HSIL with cases showing mixed LSIL and HSIL features. Design.—We compiled performance data from the College of American Pathologists Interlaboratory Comparison Program in Cervicovaginal Cytopathology from the years 2003 and 2004, and compared the performance of slides showing relatively pure LSIL and HSIL (≤10% misclassification as HSIL and LSIL, respectively) with slides showing mixed LSIL or HSIL features (cases misclassified as LSIL or HSIL >10% of the time). Results.—Interpretations from a total of 4508 cases (2452 HSIL and 2056 LSIL) were analyzed. Overall, the sensitivity of participants on slides with a reference diagnosis of HSIL was 97.3%, and of LSIL was 95.9%. Performance trends for pure versus mixed cases varied by slide type and reference diagnosis. For conventional slides, participant sensitivity on pure HSIL cases was greatest (98.0%) and on pure LSIL cases was least (95.2%), while participant performance on cases with mixed features was intermediate (97.0% for mixed HSIL and 96.7% for mixed LSIL). In contrast, participant performance on ThinPrep slides showed the greatest sensitivity for mixed LSIL slides (97.9%), while performance on mixed HSIL slides showed the lowest sensitivity (95.7%); slides with pure features had intermediate sensitivity levels (96.3% for both HSIL and LSIL). Further evaluation demonstrated that conventional pure HSIL slides performed significantly better than mixed HSIL slides (P = .006), whereas mixed LSIL slides performed better than pure LSIL slides (P = .01). For ThinPrep slides, pure HSIL cases performed similarly to mixed HSIL cases (P = .43), while mixed LSIL cases performed better than pure LSIL cases (P = .04). Conclusion.—Slides with mixed LSIL and HSIL features have measurably distinct performance characteristics in comparison to slides with pure LSIL or HSIL features. Participant performance on conventional mixed cases is distinctly different from performance on ThinPrep mixed cases.

Radiotherapy of Intracranial Astrocytomas

Neurosurgery ◽  
1979 ◽  
Vol 5 (3) ◽  
pp. 301-308 ◽  
Author(s):  
Paul W. Scanlon ◽  
William F. Taylor
Keyword(s):  
Radiation Therapy ◽  
Postoperative Radiotherapy ◽  
Tumor Grade ◽  
Low Grade ◽  
Unexpected Finding ◽  
High Grade ◽  
Death Rates ◽  
Brain Irradiation ◽  
Total Brain ◽  
Better Than

Abstract In a review of 417 intracranial astrocytomas treated radiotherapeutically at the Mayo Clinic from 1960 through 1969, the well-known correlation of tumor grade with survival was verified. Totally unexpected was the finding that age was fully as important a discriminant as tumor grade. Another unexpected finding was that patients treated with biopsy only followed by radiation therapy did as well as or slightly better than those subjected to resection followed by postoperative radiotherapy. We could not verify the importance to survival of either large dose or large volume radiotherapy, which has been emphasized by some. Patients receiving less than 1400 rets did just as well as or slightly better than those receiving more than 1400 rets. With low grade astrocytomas, survival beyond 4 years was significantly worse (higher death rates) in the group receiving more than 1400 rets. This suggested the possibility of radiation damage with delayed manifestations. We also could not verify an increased effectiveness for the generally accepted use of total brain irradiation for high grade gliomas.

scholarly journals A New Approach for the Modification of Paper Surface Properties Using Polyoxometalates

Materials ◽  
2010 ◽  
Vol 3 (1) ◽  
pp. 201-215 ◽  
Author(s):  
Mikhail Saraiva ◽  
José A. Gamelas ◽  
António Mendes de Sousa ◽  
Bruno Reis ◽  
José Amaral ◽  
...  
Keyword(s):  
Surface Properties ◽  
New Approach ◽  
Paper Surface

Investigation into Coating Surface Free Energy and Microstructure of Coated Paper Related to Pigment

2014 ◽  
Vol 884-885 ◽  
pp. 212-215
Author(s):  
Ying Li ◽  
Wen Juan Gu ◽  
Bang Gui He
Keyword(s):  
Free Energy ◽  
Calcium Carbonate ◽  
Surface Free Energy ◽  
Coating Layer ◽  
Physical Structure ◽  
Coated Paper ◽  
Paper Surface ◽  
Pigment Coating ◽  
Printing Ink ◽  
Better Than

The physical structure of coating layer have an important influence on transferring and setting of the printing ink. In this study, the effect of pigment on surface microstructure and surface free energy was investigated. The findings indicated that the pigment affected the pore size, depth and distribution of the coated paper surface. Kaolin pigment compared with calcium carbonate pigment was good to improve the paper surface smoothness. Surface free energy of kaolin pigment coating was higher than calcium carbonate pigment coating, which showed that surface wettability of coating with kaolin pigment was better than calcium carbonate pigment.

Influence of Surface Properties of Coated Papers on Printed Electronics

2012 ◽  
Vol 51 (17) ◽  
pp. 6025-6036 ◽  
Author(s):  
Petri Ihalainen ◽  
Anni Määttänen ◽  
Joakim Järnström ◽  
Daniel Tobjörk ◽  
Ronald Österbacka ◽  
...  
Keyword(s):  
Surface Properties ◽  
Printed Electronics ◽  
Coated Papers
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