A study of mechanical properties of papers exposed to various methods of accelerated ageing. Part I. The effect of heat and humidity on original wood-pulp papers

Havlı́nová, Bohuslava; Katuščák, Svetozár; Petrovičová, Miroslava; Maková, Alena; Brezová, Vlasta

doi:10.1016/j.culher.2008.07.009

Cited by 65 publications

(35 citation statements)

References 28 publications

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“…As moisture in paper can affect the rate of degradation, higher moisture content leading to more degradation during heat aging (du Plooy 1981;Welf 2005;Havlínová et al 2009), the hydration state of the paper in the different areas was measured after producing the tideline (Table 6). Due to a difference in the temperature and relative humidity in the two locations where the measurements were done, it was observed that the moisture content of aTL area in 'condition 1' (5.39 %) was a little smaller than in 'condition 2' (5.70 %).…”

Section: Sheet With a Tidelinementioning

confidence: 99%

Degradation of cellulose at the wet-dry interface: I—study of the depolymerization

Jeong

Dupont²,

Rie³

2012

Cellulose

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The degradation of cellulose in paper due to the formation of a tideline at the wet-dry interface when paper is suspended in water was explored. SEC/ MALS was used to assess the molar mass, while ICP/ MS, SEM/EDS and CE/UV provided a qualitative and quantitative analysis of the elements and inorganic ions present in the paper. Immediately after the formation of the tideline, no significant depolymerization was observed at the wet-dry interface, despite the accumulation of water soluble brown and/or fluorescent degradation compounds and salts containing sodium, chlorine, sulfur and calcium. Various artificial aging configurations were applied to the paper with tidelines to evaluate the effect of the material accumulated at the wet-dry interface on the long-term stability of paper. The decrease in the molar mass of cellulose (above, at and below the tideline) differed depending on the type of aging, i.e. whether the entire sheet of paper was aged or whether small amounts of paper from the different areas were sampled and aged, individually or together, which evidences a complex degradation pathway. In the former aging configuration the material accumulated in the tideline affected the degradation of the tideline area to the same extent or more than the other areas. When the different areas of the paper sheet were sampled and aged together, it was found that the presence of the tideline clearly affected the degradation of the other paper areas. Conversely, in that case, cellulose within the tidelines was the least degraded. The area below the tideline, through which the water migrated, showed the most significant degradation.

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Section: Sheet With a Tidelinementioning

confidence: 99%

Degradation of cellulose at the wet-dry interface: I—study of the depolymerization

Jeong

Dupont²,

Rie³

2012

Cellulose

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“…This may be caused by a stress relaxation in the base paper during the removing process when the base paper was exposed to the solvent mixture in the removing solution. Removed papers are higher in elongation than un-removed paper, which means that solvent mixture improve paper strength and ductility [18,19,20]. …”

Section: Elongation Testmentioning

confidence: 99%

“…The decrease in tensile strength of paper samples is mainly due to swelling of cellulose fiber by solvent penetration during removing and may be partially due to the fact that coating materials are impregnated into the cellulose structure of paper and interfere with fiber to fiber interaction. Also such interference by the coating materials causes a reduction of interaction force between the fibers of coated papers, consequently resulting in decreased tensile strength of paper [13,18].…”

Section: Tensile Testmentioning

confidence: 99%

Removal of Laser Printer Toner From the Paper Surface Using Some Chemical Methods

Shara

El-Magd

Moustafa

et al. 2013

Al-Azhar Bulletin of Science- Basic Science Sector

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In this article, organic solvents are applied to a range of toner-paper combinations to determine their ability to remove toner. Paper sample printed from HP Laserjet 2300dn is soaked in 300 mlof 17 alone solvent and 133 solvent mixtures for 30 minat room temperature.Visual effect of solvent on toner and paper can be classified into 6 groups A, B, C, D, E and F.The effect of varying the solvents proportions in the mixture is explored. Solvents give good dissolving results for paper sample printed from HP Laserjet 2300dn applied on paper samples printed from different brands and same brands of different models.The evaluation of removal efficiency and re-usability of paper and its application in document forgeryare performed by optical tests on paper surfaces. Also the effect of solvents on mechanical, physical and optical properties of paper is studied. Removal of toner from security paper and its using in creating forged documents is applied in this study. Optical tests and SEM examination indicate that it is possible to remove toner from paper without damaging and discolouring the substrate.

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“…Mechanical properties of paper samples in a study under dry-heat and moist-heat accelerated aging have been studied in diverse experimental conditions; folding endurance was identified as a highly sensitive means for monitoring changes in paper structure (Havlinova et al 2009). …”

Section: Mutual Effect Of Edta and Aging Time On Strength Indexes Of mentioning

confidence: 99%

Insight on the Feasibility of Producing Durable Paper from Spruce Pulp using the Sulfate Process

Khakifirooz¹,

Ahmad²,

Nemati³

2015

BioResources

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Bleached spruce sulfate pulp was used in this study to produce paper handsheets. Ethylene diamine tetra acetic acid (EDTA( was introduced as a chelating agent in concentrations of 0, 0.25, 0.5, and 0.75%. The handsheets were exposed to UV light at wavelengths ranging from 330 to 440 nm, with time intervals of 0, 10, 20, 30, 40, and 50 h. Finally, the strength properties were measured based on ISO standards. The strength indices of the handsheets were improved by adding the proper concentration of EDTA chelating agent, in comparison with the control sample. Furthermore, increasing the aging time reduced the breaking length, tear strength, folding endurance, burst strength, and tensile strength. Tear index, tensile strength, tearing strength, bursting strength, and folding endurance were decreased respectively by 41.9, 3.1, 28.2, 29.7, and 8.6 percent without EDTA treatment by increasing the aging time.

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A study of mechanical properties of papers exposed to various methods of accelerated ageing. Part I. The effect of heat and humidity on original wood-pulp papers

Cited by 65 publications

References 28 publications

Degradation of cellulose at the wet-dry interface: I—study of the depolymerization

Degradation of cellulose at the wet-dry interface: I—study of the depolymerization

Removal of Laser Printer Toner From the Paper Surface Using Some Chemical Methods

Insight on the Feasibility of Producing Durable Paper from Spruce Pulp using the Sulfate Process

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