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An analytical method to quantitatively determine the amount of polyamide epichlorohydrin (PAE) in paperboard and white water, TAPPI Journal February 2023
ABSTRACT: Polyamide epichlorohydrin (PAE) is a permanent wet strength resin. When applied to paperboard, some amount of resin is retained in the sheet, and some is lost to the white water. An analytical method for quantify-ing the amount of PAE retained in the sheet and lost into the white water has been developed. This method hydrolyz-es the PAE to adipic acid, which in turn is derivatized to diethyl adipate and quantified by pyrolysis gas chromatogra-phy–mass spectrometry (pyGCMS). In addition, the hydrolysis conditions of the PAE were studied by the Taguchi approach, and PAE material balances around the dry sheet and white water for 3 and 6 lb/ton PAE applications have been performed. The PAE resin recovery was 95.4% with 65.0% in the sheet for the 3 lb/ton PAE-charged paper-board, and the recovery was 96.7% with 36.1% in the sheet for the 6 lb/ton PAE-charged paperboard.
A fast and non-destructive alternative to the burnout method for paperboard quality inspections using phase-contrast X-ray imaging, TAPPI Journal February 2023
ABSTRACT: An X-ray based quality inspection method for paperboard was implemented and tested as a fast and non-destructive alternative to the burnout method. An argument against X-ray imaging for inspection of paper and paperboard has been that X-ray absorption is low in paper. To overcome this limitation, we used phase-contrast X-ray imaging (PCXI), which gives higher contrast than conventional attenuation-based imaging for low-absorbing materials such as paper. The suggested PCXI method was applied to previously prepared and quality rated samples using the burnout method. A strong similarity between the burnout images and the PCXI images was observed. In conclusion, further development of the phase-contrast X-ray method would provide an interesting option for replacing or complementing the standard burnout method.
Journal articles
Using white liquor as the alkali source in oxygen delignific
Using white liquor as the alkali source in oxygen delignification, TAPPI JOURNAL September 2016
Journal articles
Bleaching optimization at WestRock mill in Covington, Virgi
Bleaching optimization at WestRock mill in Covington, Virginia, TAPPI JOURNAL September 2016
The Start of the Twin Wire Former Mentoring by Ben Thorp
The Start of the Twin Wire Former Mentoring by Ben Thorp In the 1950’s, Time-Life Corp. forecasted a growth in postal rates which would have made it cost prohibitive to mail magazines that used 50 +
Mascoma Corporation--Corporate Profile and Path to commercialization, 2008 Int'l. Bioenergy & Bioproducts Conference
Mascoma Corporation--Corporate Profile and Path to commercialization, 2008 Int'l. Bioenergy & Bioproducts Conference
New Feedstock Technologies for Biomass, 2008 Engineering, Pulping and Environmental Conference
New Feedstock Technologies for Biomass, 2008 Engineering, Pulping and Environmental Conference
Ethanol Production--from Forest Residues via Gasification and Mixed Alcohol Synthesis, 2008 Engineering, Pulping and Environmental Conference
Ethanol Production--from Forest Residues via Gasification and Mixed Alcohol Synthesis, 2008 Engineering, Pulping and Environmental Conference
Blue Heron Paper Company, 2008 Engineering, Pulping and Environmental Conference
Blue Heron Paper Company, 2008 Engineering, Pulping and Environmental Conference
Weathering a Tough Economy, 2008 Engineering, Pulping and Environmental Conference
Weathering a Tough Economy, 2008 Engineering, Pulping and Environmental Conference