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Magazine articles
Predicting strength characteristics of paper in real time using process parameters, TAPPI Journal March 2022
ABSTRACT: Online paper strength testing methods are currently unavailable, and papermakers have to wait for manufacture of a complete reel to assess quality. The current methodology is to test a very small sample of data (less than 0.005%) of the reel to confirm that the paper meets the specifications. This paper attempts to predict paper properties on a running paper machine so that papermakers can see the test values predicted in real time while changing various process parameters. This study was conducted at a recycled containerboard mill in Chicago using the multivariate analysis method. The program provided by Braincube was used to identify all parameters that affect strength characteristics. Nearly 1600 parameters were analyzed using a regression model to identify the major parameters that can help to predict sheet strength characteristics. The coefficients from the regression model were used with real-time data to predict sheet strength characteristics. Comparing the prediction with test results showed good correlation (95% in some cases). The process parameters identified related well to the papermaking process, thereby validating the model. If this method is used, it may be possible to predict various elastic moduli (E11, E12, E22, etc.) in the future as the next step, rather than the traditional single number “strength” tests used in the containerboard industry, such as ring crush test (RCT), corrugating medium test (CMT), and short-span compression strength test.
Journal articles
Magazine articles
Effects of phosphogypsum whiskers modification with calcium stearate and their impacts on properties of bleached softwood paper sheets, TAPPI Journal September 2021
ABSTRACT: By combining the structural properties and characteristics of phosphogypsum whiskers, a preliminary study on the modification of phosphogypsum whiskers and their application in papermaking was carried out. The effects of reaction temperature, reaction time, and reaction concentration on the solubility and retention of modified phosphogypsum whiskers and the effects of phosphogypsum whiskers on the physical properties of paper under different modified conditions were explored. The research results show that, after the phosphogypsum whiskers are modified with calcium stearate, a coating layer will be formed on the surface of the whiskers, which effectively reduces the solubility of the phosphogypsum whiskers. The best modification conditions are: the amount of calcium stearate relative to the absolute dry mass of the phosphogypsum whisker is 2.00%; the modification time is 30 min, and the modification temperature is 60°C. The use of modified phosphogypsum whiskers for paper filling will slightly reduce the whiteness, folding resistance, burst resistance, and tensile strength of the paper, but the tearing degree and retention of the filler will be increased to some extent.
Magazine articles
Environmental issues continue to be a major industry concern, TAPPI JOURNAL, September 2000, Vol. 83(9)
Environmental issues continue to be a major industry concern, TAPPI JOURNAL, September 2000, Vol. 83(9)
Magazine articles
Taiwan holds first symposium on environmentally friendly and emerging technologies for a sustainable industry, TAPPI JOURNAL, September 2000, Vol. 83(9)
Taiwan holds first symposium on environmentally friendly and emerging technologies for a sustainable industry, TAPPI JOURNAL, September 2000, Vol. 83(9)
Magazine articles
Jiangxi Chenming Drives Chinese LWC Market, Solutions!, December 2005, Vol. 88(12) (268KB)
Jiangxi Chenming Drives Chinese LWC Market, Solutions!, December 2005, Vol. 88(12) (268KB)
Magazine articles
Paper Summit pulls industry together, Solutions!, March 2004, Vol. 87(3) (63KB)
Paper Summit pulls industry together, Solutions!, March 2004, Vol. 87(3) (63KB)
Magazine articles
Reconditioning wire pressure screen cylinders, Solutions!, March 2004, Vol. 87(3) (85KB)
Reconditioning wire pressure screen cylinders, Solutions!, March 2004, Vol. 87(3) (85KB)
Magazine articles
Pimaâ??s 2004 leadership conference focuses on thriving in a challenging environment, Solutions!, May 2004, Vol. 87(5) (43KB)
Pima’s 2004 leadership conference focuses on thriving in a challenging environment, Solutions!, May 2004, Vol. 87(5) (43KB)
Magazine articles
Looking east, part II, Solutions!, November 2004, Vol. 87(11) (49KB)
Looking east, part II, Solutions!, November 2004, Vol. 87(11) (49KB)
Magazine articles
Outing outsourcing, Solutions!, November 2004, Vol. 87(11) (58KB)
Outing outsourcing, Solutions!, November 2004, Vol. 87(11) (58KB)