Description
FIELD OF THE INVENTION
The present invention relates to increasing the filler/ash % age of pulp & paper by addition of new inventive product without any compromise in paper machine runnability and strength, physical and printing properties of pulp and paper.
BACKGROUND OF THE INVENTION
It is a desirable phenomenon that every papermaker wants to make a paper with increased filler %age due to economic reasons since fiber is much costlier than filler and moreover, the shortage of fiber in coming years has become a matter of concern internationally for pulp & paper mills.
While a paper maker wants to increase the filler %age but after a certain level problems like decline in desired strength/physical parameters, runnability of paper forming machine and other problems, does not allow him to increase beyond that level.
SUMMARY OF THE INVENTION
By the treatment of pulp before sheet formation with our innovative product, the papermaker can increase the filler content beyond that level by additional 0.5% - 5% without facing any negative effects associated with increasing filler loading.
The present invention seeks to fulfill these needs and contribute in arresting depletion of forest reserves and provides further economic and related advantages.
Detailed Description of the Preferred Embodiment
The increament in ash %age achievable by using the product varies from mill to mill and depends upon a number of factors like machine profile, control ash retention, control strength/physical properties of paper, other chemicals/additives used by the paper mill and similar other factors, therefore, it is not easy to comment on the %age increase in ash possible but lab and pilot experiments show that anything between 0.5% - 5% or even more is achievable by using the product.
Control word is defined as the said parameter without addition of the product.
Since not all paper mills operate at the same parameters, in fact, all mills have different operational parameters; the increament of filler by product's application may be without increasing the filler loading i.e. by increasing ash retention or may be by increasing the filler loading and not at all improving the ash retention or improving it slightly.
The point of addition may be anything between pulping stage to just before sheet formation practically upto headbox; the preferred point of additions as concluded from pilot experiments are just before refiners to machine chest or dosing cocurrently with filler slurry line or addition of product to filler slurry which can also be termed as pre treatment of filler with product; these are the point of additions at which the product has proved to give the best optimum performance.
The product is in the powder form and it is better to prepare the solution in water before application hi pulp and paper, the product hi dry form added to thick or thin stock may also be tried.

The powder is mixed with water anything between 0.01% - 20%(the dilution %age is not very important but it becomes very difficult to increase concentration beyond 20% since the viscosity becomes very high) This is solution is checked for any lumps that might form if product is not prepared without agitation at moderate to high r pm( 50 - 1000); higher the rpm of stirrer better will be the solution's preparation. The solution may be sieved if at all the lumps are formed during preparation. The solution thus prepared may or may not be heated before addition to pulp but the efficiency of the product improves if solution is cooked to 70 - 95° C before addition to pulp to any suitable and convenient point of addition.
in which pulp, paper and paper board is manufactured from Fibre obtained from commercially know source for e.g. wood, straw(of different origin), bagasse, bamboo, cotton and others(includes all)
Example No. 1
The product is prepared in water in the above mentioned manner and laboratory hand sheets were formed with dete of sizing agent, dosage etc as mentioned below.
Details of the strength properties, ash content and other significant quality parameters are also mentioned which clearly indicates the effectiveness of the product.
Table No.1
(Table Removed)

Claims
1. A Process to increase the filler or ash% of pulp and paper comprising:
adding to a paper pulp slurry in the wet end of a paper making our innovative product which is added to pulp slurry before paper making and paper is formed with increased filler without any compromise with machine runnability and without any decline in strength properties, printing properties and other important parameters that specifies the qualities of the paper.
2. The Process of claim 1 wherein the innovative product mentioned is a blend of primarily two parts, where
the one part is natural or modified gum or blend of gums and second part is modified starch or
native/unmodified starch
3. The Composition of claim 2 wherein the gum is cassia tora
4. The Composition of claim 2 wherein the gums may be selected from any or combination or all of gums i.e.
guargum, locust bean gum, tamarind gum, cassia fistula, acacia/Arabic, sesbania/dhencha gum, xanthan or
other commonly commercially available gums.
5. In claims 3 & 4 wherein the gums mentioned may be pure i.e. unmodified or chemically modified.

6. The composition of claim 2 wherein the modified starch is cationic starch
7. The composition of claim 2 wherein the modified starch is amphoteric or anionic
8. In claims 5 & 6 wherein the degree of substitution may be lowest to highest possible through commonly
or less commonly known methods of modifications. For e.g. reacting starch with commonly and
commercially available cationic reagent( such as Servon XRK 69 from Elementis Specialities') to make
cationic starch
9. Method of claim 2 wherein the starch may be maize, tapioca, potato, sago, rice or other commercially
known starches

10. Method of claim 2 wherein the % age of part one i.e. gum(s) may vary from 5% to 95%
11. Method of claim 2 wherein the %age of part two i.e. modified starch may vary from 5% to 95%
12. Method of claim 1 wherein the wet end of paper making may be anything between start of pulping stage
to head box.
13. Method of claim 1 wherein filler may be any commercially and commonly or less commonly known
fillers for e.g. china clay, calcium carbonate, soap stone powder, bentonite etc
14. Method of claim 2 wherein adding some quantities of modified starches, for e.g. pre gel starches,
dextrins etc does not affect the performance of the product in a major way. The %age may be anything
between 1% to 40%
15. Method of claim 2 wherein adding some quantities of synthetic polymers, for e.g. polyacrylamide( of
any mol wt and degree of substitution) does not affect the performance of the product in a major way. The
%age may be anything between 0.1% to 20%