Back to Search
Start Over
Development of post hybrid calcium carbonate for high loaded paper
- Source :
- BioResources. 16:7716-7728
- Publication Year :
- 2021
- Publisher :
- BioResources, 2021.
-
Abstract
- In papermaking, pre-flocculation of fillers such as ground calcium carbonate (GCC) improves the tensile strength of paper sheets. However, the pre-flocculated fillers mostly suffer from the instability of the floc shape such as the decrease in floc diameter with time elapse after preparation and no improvement of bulk and stiffness. The addition of calcium compounds such as calcium oxide or calcium hydroxide to the pre-flocculated GCC, and injection with carbon dioxide caused pre-flocculated GCC flocs to be covered with newly formed calcium carbonate. This product, called post hybrid calcium carbonate (pHCC), was found to be more stable in size and gave better sheet strength than the pre-flocculated ones. Furthermore, pHCC gave remarkably higher bulk and stiffness than the pre-flocculated flocs did without impairing smoothness that was essential in printing paper. The proper use of pHCC in papermaking could allow the production of high loaded paper with more than 10% higher filler contents, which could reduce paper production cost and save drying energy. The proportion of the newly formed calcium carbonate in pHCC, turbulence intensity at preparation stage, and the effect of storage time were investigated.
- Subjects :
- Environmental Engineering
Calcium hydroxide
Materials science
Papermaking
Bioengineering
engineering.material
chemistry.chemical_compound
Calcium carbonate
chemistry
Chemical engineering
Filler (materials)
Ultimate tensile strength
Carbon dioxide
Calcium Compounds
engineering
Calcium oxide
Waste Management and Disposal
Subjects
Details
- ISSN :
- 19302126
- Volume :
- 16
- Database :
- OpenAIRE
- Journal :
- BioResources
- Accession number :
- edsair.doi...........4374b50cee348035f969f091b3a1ffcc