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Magazine articles
Open Access
Suction roll pilot bearing failure due to inadequate lubrication, TAPPI JOURNAL, December 1994, Vol. 77(12), TAPPI JOURNAL, December 1994, Vol. 77(12)

Suction roll pilot bearing failure due to inadequate lubrication, TAPPI JOURNAL, December 1994, Vol. 77(12), TAPPI JOURNAL, December 1994, Vol. 77(12)

Journal articles
Open Access
Effect of basis weight and freeness on sheet permeability and critical impulse-drying temperature, TAPPI JOURNAL, February 1994, Vol. 77(2)

Effect of basis weight and freeness on sheet permeability and critical impulse-drying temperature, TAPPI JOURNAL, February 1994, Vol. 77(2)

Journal articles
Open Access
Predicting print mottle: a method of differentiating between three types of mottle, TAPPI JOURNAL, July 1994, Vol. 77(7)

Predicting print mottle: a method of differentiating between three types of mottle, TAPPI JOURNAL, July 1994, Vol. 77(7)

Journal articles
Open Access
The dagbladet full-scale printing trials: part 3: linting in four-color offset printing, TAPPI JOURNAL, July 1994, Vol. 77(7)

The dagbladet full-scale printing trials: part 3: linting in four-color offset printing, TAPPI JOURNAL, July 1994, Vol. 77(7)

Journal articles
Open Access
Control valves - the key component in managing process variability, TAPPI JOURNAL, August 1997, Vol. 80(8)

Control valves - the key component in managing process variability, TAPPI JOURNAL, August 1997, Vol. 80(8)

Journal articles
Open Access
Page ethanol-kraft pulping and papermaking properties of aspen and spruce, TAPPI JOURNAL, January 1997, Vol. 80(1)

Page ethanol-kraft pulping and papermaking properties of aspen and spruce, TAPPI JOURNAL, January 1997, Vol. 80(1)

Journal articles
Open Access
Capital effectiveness of the paper industry, TAPPI JOURNAL, October 1997, Vol. 80(10)

Capital effectiveness of the paper industry, TAPPI JOURNAL, October 1997, Vol. 80(10)

Journal articles
Open Access
A financial analysis of north american pulp, paper and packaging firms, TAPPI JOURNAL, September 1999, Vol. 82(9)

A financial analysis of north american pulp, paper and packaging firms, TAPPI JOURNAL, September 1999, Vol. 82(9)

Journal articles
Magazine articles
Open Access
Dynamic compression characteristics of fiber-reinforced shoe press belts, TAPPI Journal April 2025

ABSTRACT: Shoe press belts contribute significantly to the overall dewatering performance in the press section of a paper machine. Within the shoe press nip, the press belt faces a dynamic and multidimensional load that mainly leads to a compression of the structure. As this will cause a loss in void volume, knowledge of the dynamic compression characteristics of shoe press belts is crucial for optimized dewatering. A novel method was developed to examine the dynamic compression characteristics of grooved polyurethane press belts. Therefore, an experimental setup allowing realistic boundary conditions to test specimens was placed in a servo-hydraulic testing machine. Press belt specimens with different matrix material formulations and groove patterns were tested under varying load rates equivalent to different paper machine operational speeds. The results showed an evident sensitivity of the dynamic compression stiffness to the operational speed of the paper machine. This behavior was seen to be more sensitive to changes in the matrix material formulation than to adaptions of the groove pattern. As a result, the compression of the press belt within a shoe press nip is not only influenced by the peak pressure within the shoe press nip but also depends on the operational speed of the paper machine.

Journal articles
Magazine articles
Open Access
Study on the effect of aluminum diethyl phosphinate in synergy with ammonium polyphosphate on the flame retardancy of cellulose paper, TAPPI Journal April 2025

ABSTRACT: This paper involved the synergistic incorporation of ammonium polyphosphate (APP) and diethyl aluminum phosphinate (AlPi) as flame-retardant fillers for producing flame-retardant paper. The research revealed that APPs were square particles with a smooth surface, and their solubility was 0.29 g/100 mL at 20°C, which increased to 4.12 g/100 mL at 60°C. The surfaces of AlPis were rough and irregular. The solubility of AlPi was 0.023 g/100 mL at 20°C, and the solubility remained stable when the temperature increased. The addition of AlPi had a minor influence on the pulp beating degree. The tensile strength of kraft/APP/AlPi decreased with the increase of the AlPi addition. For a paper with 20 wt% APP and 0 wt% AlPi, the limiting oxygen index (LOI) value was 27.2%, and it burned completely at the eighth second during vertical combustion. When the AlPi additive content increased to 20 wt%, its LOI value increased to 32.2%, and the vertical combustion self-extinguished as soon as the flame was removed. Scanning electron microscopy (SEM) showed that the char residue of the kraft/APP/AlPi had a more complete fiber network structure than that of kraft/APP. The Raman spectroscopy indicated that the area ratio of the D (amorphous phase; disordered graphite vibration) band to the G (crystal phase; graphite carbon vibration) band (ID/ IG) ratio of kraft/APP/AlPi was lower than that of kraft/APP, meaning that the graphitization degree of the char residue of kraft/APP/AlPi was higher than that of kraft/APP, which indicated the kraft/APP/AlPi had better flame retardancy.

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