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Temiscaming, Canada

Tembec Inc. is a paper company in Canada. Tembec has approximately 6000 employees located in Canada, United States, and France. Tembec's operating divisions include Forest Products, Pulp, Paper & Paperboard, and Chemicals.The Forest Products Group comprises 31 manufacturing operations producing softwood lumber, engineered wood products, and specialty wood products. The Pulp, Paper & Paperboard Group consists of 9 pulp manufacturing plants, 5 paper manufacturing plants and 1 paperboard plant. The Chemicals group produces resins, ethanol and lignin from the pulping discharge in five of its pulping plants. Wikipedia.

Liu H.,Tianjin University of Science and Technology | Liu H.,Nanjing Forestry University | Chen Y.,Tianjin University of Science and Technology | Zhang H.,Tianjin University of Science and Technology | And 5 more authors.
Industrial and Engineering Chemistry Research | Year: 2012

Although high-yield pulps (HYP) are gaining increasing use to replace hardwood kraft pulp in paper grades such as uncoated and coated fine papers, the amount has been typically limited to less than 20% because there are concerns about its potential impact on papermaking operation and product quality. To address these concerns, laboratory experiments that mimic the actual paper machine operation were carried out and coated paper samples from mill trials were examined to clarify the impact of high-level HYP substitution on the properties of coated wood-free papers. Results showed that the HYP substitution, even at 40%, did not yield negative effects on strength properties such as tensile and tear; in fact the Scott bond increased with the HYP addition. The small increase in the surface roughness from the HYP addition can be eliminated by the filler addition, precalendering, and coating process. The lower brightness and CIE (Commission Internationale d'Eclairage) whiteness of the HYP can be compensated for by the addition of optical brightening agents (OBAs) and dyes, as well as pigments in the coating color. The analysis of samples collected from mill trials indicated that coated paper containing 40% HYP has lower coating penetration than that containing 40% HYP content paper samples. This was attributed to the smaller pore size created by HYP substitution. No significant differences were found between the samples containing 17 and 40% HYP on print gloss, color gamut, and print gloss uniformity. The implication from this study is that the HYP substitution level can be increased up to 40% in the production of coated wood-free paper without significant negative effect on the paper quality. © 2012 American Chemical Society. Source

Ni Y.,University of New Brunswick | He Z.,University of New Brunswick | Zhang H.,Tianjin University of Science and Technology | Zhou Y.,Tembec Inc.
Journal of Biobased Materials and Bioenergy | Year: 2011

In this paper, some of the recent results are reviewed on the characteristics of BCTMP-based high-yield pulp (HYP) and its effect on the wet-end operations of the papermaking process in the production of printing and writing paper, including internal sizing, filler retention, and OBA/dye addition. Compared with bleached kraft pulp (BKP), the HYP contains more fines, lignin and anionic trash, as well as more carboxylic and sulfonic groups. Due to these differences, substituting HYP for BKP may have some impacts on the wet-end chemistry of the papermaking process. Generally, HYP has higher response to AKD sizing than BKP due to the higher anionic group content and self-sizing capability of HYP, although HYP fines and anionic trash can affect the sizing adversely. The addition of cationic polymers, such as PEI, can eliminate the negative effect of HYP anionic trash on internal sizing and filler retention. Under the optimized conditions, a partial substitution of BKP with HYP can lead to improved filler retention. OBA/dye can be used to improve the optical properties of HYP and HYP-containing furnish. © 2011 American Scientific Publishers. Source

Thompson D.,Natural Resources Canada | Chartrand D.,Natural Resources Canada | Staznik B.,Natural Resources Canada | Leach J.,Tembec Inc. | Hodgins P.,General Airspray Ltd.
New Forests | Year: 2010

Aerial application of herbicides continues to be a dominant method of vegetation control in Canadian forest management. In this paper, we describe a suite of relatively modern technologies and emphasize their potential for integrated use in optimization of aerial herbicide treatments. The potential is illustrated using several case studies involving fixed-wing applications of glyphosate-based herbicide in the boreal forest region of Ontario, Canada. Results indicate that integration of geographic information systems, differential global positioning, electronic-guidance, on-site meteorological monitoring and remote sensing can be used to effectively plan, enhance application control and provide detailed post-treatment assessment and archival data for herbicide spray programs. SprayAdvisor, a GIS-based decision support system with the capacity to directly integrate all of these elements is briefly described. © 2009 Springer Science+Business Media B.V. Source

He Z.,University of New Brunswick | Hui L.,Pulp and Paper Research Institute of Canada | Liu Z.,Tianjin University of Science and Technology | Ni Y.,University of New Brunswick | Zhou Y.,Tembec Inc.
Tappi Journal | Year: 2010

Without any fillers and optical brightening agents (OBAs), 15%-20% substitution of high-yield pulps (HYPs) for the hardwood bleached kraft pulp (BKP) in a paper furnish can decrease the brightness stability significantly because HYP contains a large amount of lignin. However, using mineral fillers such as precipitated calcium carbonate (PCC) and OBA in a HYP-containing paper can essentially eliminate the negative effect of HYP substitution on the brightness stability of uncoated wood-free paper. During the commercial production of traditional wood-free paper products, which usually use both PCC and OBA, 15%-20% HYP substitution for the hardwood BKP will not have practical impact on the paper brightness stability. Results from commercial printing and writing paper production support the same conclusion. Application: Papermakers can produce high-quality uncoated wood-free paper using high-yield pulp without affecting the brightness stability. Source

Tembec Inc. | Date: 2013-09-03


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