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Quantification of vegetable oil in recycled paper, TAPPI JOURNAL September 2020
ABSTRACT: Vegetable soybean oil is commonly used in cooking foods that are packaged in takeaway paper-board containers. Vegetable oil is hydrophobic, and in sufficiently high concentration, could interfere with interfiber bonding and result in paper strength loss. In order to quantify the effect of oil on the resulting paperboard strength, it is necessary to quantify the oil content in paper. A lab method was evaluated to determine the soybean oil content in paper. Handsheets were made with pulps previously treated with different proportions of vegetable oil. Pyrolysis gas chromatography-mass spectrometry (pyGCMS) was used to quantify the amount of oil left in the handsheets. The results revealed a strong correlation between the amount of oil applied to the initial pulp and the amount of oil left in the handsheets.In addition, the effect of vegetable oils on paper strength may be affected by the cooking process. Vegetable oil is known to degrade over time in the presence of oxygen, light, and temperature. The vegetable oil was put in an oven to imitate the oil lifecycle during a typical pizza cooking process. The cooked oil was then left at room temperature and not protected from air (oxygen) or from normal daylight. The heated, then cooled, oil was stored over a period of 13 weeks. During this time, samples of the aged oil were tested as part of a time-based degradation study of the cooked and cooled oil.
Journal articles
Magazine articles
Evaluation of novel drum chipper technology: pilot-scale production of short wood chips, TAPPI Journal October 2019
ABSTRACT: Impregnation of wood chips with acidic pulping liquors is improved when using short chip lengths. If the average wood chip length is too short, conventional chipping technology will generate excess small material, such as pin chips and fines. The possibility of using newly developed drum chipping technology to produce short-length wood chips was evaluated with a pilot drum chipper operating at different drum velocities and in-feed angles. With a drum velocity of 30 m/s, the average wood chip lengths and the combined fractions of pin chips and fines were 24 mm and 3.3%, 22 mm and 4.2%, and 17 mm and 8.5%. The highest fractions of total accept chips (large and small accepts), 89% to 90% without screening, were observed for drum velocities of 30•34 m/s and average wood chips lengths of 21•22 mm. The results indicate the potential of drum chipping technology for producing short wood chips with relatively high fractions of accept chips and tolerable fractions of pin chips and fines.
Journal articles
A six-year review of the TAPPI research funding program, TAPPI JOURNAL, April 2000, Vol. 83(4)
A six-year review of the TAPPI research funding program, TAPPI JOURNAL, April 2000, Vol. 83(4)
Journal articles
Dynamic behavior of a pulp processing and reject refining plant, TAPPI JOURNAL, April 2000, Vol. 83(4)
Dynamic behavior of a pulp processing and reject refining plant, TAPPI JOURNAL, April 2000, Vol. 83(4)
Journal articles
Chip size distribution for an ultra-high-yield sulfite process, TAPPI JOURNAL, April 2000, Vol. 83(4)
Chip size distribution for an ultra-high-yield sulfite process, TAPPI JOURNAL, April 2000, Vol. 83(4)
Journal articles
Fractionation of wood pulps by continuous flotation, TAPPI JOURNAL, August 2000, Vol. 83(8)
Fractionation of wood pulps by continuous flotation, TAPPI JOURNAL, August 2000, Vol. 83(8)
Journal articles
Use of an extremely high specific activity xylanase in ecf and tcf pulp bleaching, TAPPI JOURNAL, August 2000, Vol. 83(8)
Use of an extremely high specific activity xylanase in ecf and tcf pulp bleaching, TAPPI JOURNAL, August 2000, Vol. 83(8)
Journal articles
Industrial implementation of an advanced bleach plant control system, TAPPI JOURNAL, January 2000, Vol. 83(1)
Industrial implementation of an advanced bleach plant control system, TAPPI JOURNAL, January 2000, Vol. 83(1)
Journal articles
Methanol formation during alkaline wood pulping, TAPPI JOURNAL, July 2000, Vol. 83(7)
Methanol formation during alkaline wood pulping, TAPPI JOURNAL, July 2000, Vol. 83(7)
Journal articles
Tear and tensile properties of soda pulps from kenaf bast fibers, TAPPI JOURNAL, June 2000, Vol. 83(6)
Tear and tensile properties of soda pulps from kenaf bast fibers, TAPPI JOURNAL, June 2000, Vol. 83(6)