Study of the mechanical behavior of recycled fibers. Applications to papers and paperboards.

Ali, Imtiaz

doi:10.31237/osf.io/46w8m

Cited by 3 publications

(4 citation statements)

References 68 publications

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“…The fibers became brittle with weak points. These morphological changes could produce decreases in strength properties (Ali 2013). Delgado-Aguilar et al 2015 found that the evolution of mechanical properties by adding CNF in bulk represents an alternative to classic refining.…”

Section: Tensile Burst and Stiffnessmentioning

confidence: 99%

“…However, a paper with good strength properties requires refining cycles to promote the bonding ability, to counteract the changes in the fibers which produce their irreversible loss of flexibility (Weise and Paulapuro 1995), and the presence of additives with cationic charges, which influence the retention process of fibers and fillers in paper or paperboard (Hubbe et al 2007). Although chemical additives compensate for the deteriorated quality of recycled fibers, they contribute to higher product costs (Ali 2013).…”

Section: Introductionmentioning

confidence: 99%

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Nanocellulose addition to recycled pulps in two scenarios emulating industrial processes for the production of paperboard

Ehman,

Aguerre,

Vallejos

et al. 2023

Maderas, Cienc. tecnol.

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This study assesses the incorporation of nanocellulose in a paperboard feedstock emulating two scenarios of industrial processes. It included the production of 170 g/m 2 paperboard, using mixtures of short-fiber and long-fiber fractions from recycled pulps with typical mill additives. In all cases, 3 wt. % of nanocellulose was added to the pulp suspensions. The first scenario involved three types of nanocellulose addition in a mixture of 78 % long-fiber/22 % short-fiber pulps. The second scenario included the addition of two types of nanocellulose to an unrefined long fiber pulp to produce a multilayer paperboard. Drainage time and physical-mechanical properties of the handsheets were evaluated. Nanocellulose improved the mechanical properties in all cases. The tensile and burst indexes increased 19 % and 28 % in Scenario 1 and up to 60 % and 43 % in Scenario 2, respectively. The lower values in mechanical properties for Scenario 1 were attributed to the effect of the retention system. A new retention system using a cationic polymer with a high charge density produced decreases up to 79 % in the drainage time.

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Section: Tensile Burst and Stiffnessmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Nanocellulose addition to recycled pulps in two scenarios emulating industrial processes for the production of paperboard

Ehman,

Aguerre,

Vallejos

et al. 2023

Maderas, Cienc. tecnol.

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“…Pada industri kertas yang menggunakan kertas daur ulang akan mengalami penurunan kekuatan, karena serat menjadi kaku dan rapuh. Titik lemah pada dinding serat akan meningkat setelah mengalami beberapa kali frekuensi daur ulang (Ali, 2013). Untuk meningkatkan kekuatan umumnya dilakukan penambahan serat panjang yang berasal dari KKG bekas impor.…”

Section: Pembuatan Larutan Induk Xylanunclassified

Peningkatan Mutu Kertas Daur Ulang Menggunakan Xylan ( Improvement Quality of Recycled Fiber Using Xylan )

2017

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Corncob as agricultural waste is a potential source of xylan to be used as an additive to increase the paper strength sheets originating from old corrugated cardboard (OCC). The aim of this research is to know increasing of strength properties from recycled fiber after addition of corncob xylan, compared to the commercial xylan. The xylan extraction was carried out by acid and the addition of xylan to the fiber was carried out at 80 ºC for 30 minutes. The results showed that the use of corncob xylan 5% (w/w) can increase the tensile index by 13.08%, burst index by 9.24%, ring crush test (RCT) index by 39.13% and corrugated medium test (CMT) index by 17.44%.ABSTRAKTongkol jagung sebagai limbah pertanian merupakan sumber xylan yang potensial yang dapat digunakan sebagai aditif untuk meningkatkan kekuatan lembaran kertas daur ulang yang berasal dari Kertas Karton Gelombang (KKG) bekas. Tujuan penelitian ini adalah untuk mengetahui peningkatan kekuatan lembaran kertas daur ulang setelah penambahan xylan dari tongkol jagung, dibandingkan dengan xylan komersial. Ekstraksi xylan dilakukan dengan metode asam dan penambahan xylan terhadap serat dilakukan pada temperatur 80ºC selama 30 menit. Hasil penelitian menunjukkan bahwa penggunaan xylan tongkol jagung sebanyak 5% (berat xylan/berat kering pulp) dapat meningkatkan indeks tarik 13,08%, indeks retak 9,24%, indeks RCT 39,13% dan indeks CMT 17,44%.

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“…These goals and challenges were explored by many studies on paper recycling at the turn of the last decade [26][27][28][29][30]. Previous research mainly focused on the development of technologies that enable the reuse of fibers from wastepaper, such as bleaching methods [31][32][33][34][35] of fibers and deinking technologies [36][37][38][39].…”

Section: Introductionmentioning

confidence: 99%

Which Wastepaper Should Not Be Processed?

Małachowska

Lipkiewicz²,

Dubowik³

et al. 2023

Sustainability

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In the 21st century, numerous economic and environmental initiatives have significantly increased paper recycling, which continues to expand due to environmental awareness. With increasing recycling rate, low-quality paper fractions may be included in the process, leading to the overproduction of very low-value papers that cannot be reprocessed. Moreover, the production of paper from poor-quality wastepaper can result in the introduction of chemicals from the recycled paper into the recycling loop and unintended spread of chemical substances. Therefore, reliable and conscious selection of recycled pulp is imperative. To this end, the present study verified the properties of recycled pulp critical for the assessment of its papermaking ability for the production of high-quality sanitary paper. Following an examination of samples, it was found that the key parameters that influence the papermaking ability of wastepaper include presence of impurities, content of extractive substances, freeness, and length of fiber. On this basis, types of wastepaper that, at the very beginning, did not portend well for obtaining paper products with high potential for utility were eliminated.

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Study of the mechanical behavior of recycled fibers. Applications to papers and paperboards.

Cited by 3 publications

References 68 publications

Nanocellulose addition to recycled pulps in two scenarios emulating industrial processes for the production of paperboard

Nanocellulose addition to recycled pulps in two scenarios emulating industrial processes for the production of paperboard

Peningkatan Mutu Kertas Daur Ulang Menggunakan Xylan ( Improvement Quality of Recycled Fiber Using Xylan )

Which Wastepaper Should Not Be Processed?

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