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Sahāranpur, India

Dutt D.,Indian Institute of Technology Roorkee | Jain R.K.,Central Pulp and Paper Research Institute | Maheshwari A.,Star Paper Mills Ltd | Kaur H.,Indian Institute of Technology Roorkee
BioResources | Year: 2011

Barrier paper, which is made of bleached absorbent kraft pulp, is a significant layer of decorative laminates, since it controls the see-through of brown color of saturating kraft paper and its opacifying effect usually is achieved by a heavy loading of TiO2. The TiO2, due to its very small particle size, passes between the cellulosic fibers and drains into the white water. To overcome this problem, papermakers try to use various retention aids for improving overall retention of TiO2, but agglomeration of TiO2 causes a decrease in light scattering efficiency of TiO2. During the subsequent saturation operation, the air in the voids is replaced by melamine formaldehyde, which has a refractive index close to that of cellulose. As a result, the sheet becomes translucent and poses 'see through' problem. Keeping this in view, anhydrous magnesium silicate is used as an extender with TiO2 because it effectively increases the overall filler retention, sheet brightness, opacity. The dispersed aqueous slurry of anhydrous magnesium silicate forms fine gel that entraps TiO2 in the wet web and prevents removal of fines and fillers. The addition of 25% TiO2, 7% micronized soapstone powder, 8% anhydrous magnesium silicate, 1% melamine formaldehyde, and 0.1% sodium hexameta-phosphate was found to improve the overall retention by 65.25% and to cut the manufacturing cost by US$ 546.00 per tonne of pulp without affecting the product quality. Source

Chauhan V.S.,Thapar Center for Industrial Research and Development | Kumar N.,Thapar Center for Industrial Research and Development | Kumar M.,Star Paper Mills Ltd | Thapar S.K.,Anmol Polymers Pvt. Ltd. | Chakrabarti S.K.,Thapar Center for Industrial Research and Development
Taiwan Journal of Forest Science | Year: 2012

Primary fiber fines were screened out of virgin mixed hardwood chemical pulp through a Bauer McNett Fiber Classifier with 2 output materials of fibers and fines. The screened primary fiber fines were blended into the pulp to obtain pulps with no fines, and with 10 and 20% fines. The refining of all pulp samples was carried out in a PFI mill. The pulp with 10 and 20% fines respectively required 10.8 and 28.9% fewer PFI revolutions to obtain a 400 ml CSF level compared to the pulp without fines. At the same freeness level, the opacity of the paper increased with the addition of 10 and 20% fines by 1.7 and 2.6 points, respectively. Similarly, the formation of paper also improved by 2.0, and 10.2% with the respective addition of 10 and 20% fines to the pulp. The bulk and stiffness of the paper improved with the addition of fines up to a 450 ml CSF level. The strength properties, such as the breaking length, burst index, tear index, double fold, and Scott bond, decreased with the addition of fines. Source

Chauhan V.S.,Thapar Center for Industrial Research and Development | Kumar N.,Thapar Center for Industrial Research and Development | Kumar M.,Star Paper Mills Ltd | Thapar S.K.,Anmol Polymers Pvt. Ltd.
Taiwan Journal of Forest Science | Year: 2013

Long-fibered softwood and bamboo pulps with respective average fiber lengths of 2530 and 1688 μm were blended with eucalyptus pulp of 696 μm in average fiber length. The target was to obtain a weighted average fiber length (WAFL) of the blends similar to acacia pulp at 990 μm average fiber length. All pulps were refined with different PFI mill revolutions, and handsheets were produced. The refining behavior, drainage of pulp, and various paper properties (bulk, tensile strength, burst strength, tear index, double fold, Scott bond, air permeability, and formation) were determined and compared. The WAFL had no effect on the refining energy demand or drainage rate of the blended eucalyptus pulp. The intrinsic fiber length of the pulp furnish had greater effects on the paper properties than did the WAFL. Acacia pulp provided lower paper strength compared to eucalyptus pulp at the same refining level. The tear index was higher with acacia than eucalyptus pulp, and after blending with softwood and bamboo, eucalyptus provided a greater tear index than did acacia, which illustrates the effect of the WAFL on the tear index of paper. At 500 mL CSF, respective increases in the tear index of paper made from eucalyptus pulp blended with softwood and bamboo pulps were 3 and 20% compared to that of acacia pulp. Source

Chauhan V.S.,Thapar Center for Industrial Research and Development | Kumar N.,Thapar Center for Industrial Research and Development | Kumar M.,Star Paper Mills Ltd | Chakrabarti S.K.,Thapar Center for Industrial Research and Development | Thapar S.K.,Anmol Polymers Pvt. Ltd.
Palpu Chongi Gisul/Journal of Korea Technical Association of the Pulp and Paper Industry | Year: 2011

Beating or refining is an energy intensive process in paper industry. In India, most of the paper industries blend long fibered softwood pulps with short fibered hardwood or agro based pulps to get the paper properties of competitive level. Refining characteristics of the blend of pulps is very crucial with respect to freeness and strength properties. This study has been carried out to understand the refining behavior of three hardwood pulps and a softwood pulp. The hardwood and softwood pulps are blended in different proportions in two different ways; a) blending after their separate refining, and b) blending before refining followed by mixed refining of the blended pulps. Freeness of pulp, strength, optical and surface properties of paper along with formation have been determined and compared for both the refining methods. The fiber classification of refined pulps was also carried out to analyze the effect of refining method on fiber morphology. The mixed refining of hardwood and softwood pulps marginally affects the fiber morphology in comparison to separate refining of pulps. The strength and other properties of paper prepared from mixed refining of pulps are either better or comparable than those of separately refined pulps. Source

Chauhan S.K.S.,Star Paper Mills Ltd | Sharma S.K.,Star Paper Mills Ltd | Mishra R.L.,Star Paper Mills Ltd | Tyagi R.P.,Star Paper Mills Ltd
IPPTA: Quarterly Journal of Indian Pulp and Paper Technical Association | Year: 2011

Star Paper Mills is among the 15 largest virgin fiber paper mills in India. It has a good rapport in National and International market and has a long history of more than 70 years (since 1938). The industry is engaged not only in making of different kinds of papers e.g. Virgin fibre paper, cultural papers etc. using wood pulp as raw material from Eucalyptus, Bamboo, Poplar and other fibrous species but also engaged in implementing and promoting agroforestry and social forestry programme on large scale in different districts of Western Uttar Pradesh (India). Star Paper Mills provides good quality seeds of Eucalyptus and Bamboo, pesticides, micronutrients, manual of guidance etc. free of cost to the farmers for developing Kissan nurseries. 270 nurseries have been developed and 48 million seedlings distributed amongst farmers during 2009-2010 in adjoining districts. We have thus contributed to green area around 75000 ha till date. Star has also successfully developed infrastructure to develop superior clones of Eucalyptus and Poplar of high yield and their propagation technology on commercial scale through vegetative means under standardized mist chamber conditions. Around 30 lac clonal plants of Eucalyptus are supplied to the farmers annually. Clonal plantation which yield double the productivity compared to seedlings in shorter period is proving a boon to the farmers of Western Uttar Pradesh. Programme has been receiving encouraging response from the farmers who mostly raise Eucalyptus and Poplar on the boundaries of their farm land. The programme was initiated 10 years back and operating successfully. As regards marketing, the demand of wood based industries e.g. Paper Mills, Ply wood and Board Industries in particular is increasing rapidly and the production of wood is not able to cop-up with the growing demand of wood, For this, the farmers of Western Uttar Pradesh are consequently benefited from competition among various industries for raw material. Marketing is not a problem for the farmers to sell their crop at the time of harvesting. Farmers are however confronting with many problems like, no system for proper evaluation of their crop and they are completely in the hands of middle man. They are also facing under estimated price of their crop due to different levies laws e.g. Transit fee and Mandi fee. In addition to payment, farmers have to face hardship in obtaining the passes from these departments. Beside this there is invasion of an epidemic called Gall. There is considerable damage in India by this Wasp. We should take remedial and preventive measures. Now the research work is fully focused on to find out certain preventive and remedial measures to over come this problem. Source

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