Sunday, November 14, 2010

Grades(Tyeps) of Paper

Some of the major grades of paper classifications are:
1 Based on Usage
  • Industrial: Packaging, wrapping, filtering, electrical etc.
  • Cultural: Writing, printing, Newspaper, currency etc.
  • Food: Food wrapping, candy wrapping Coffee filter, tea bag etc
2 Based on Raw Material
  • Wood: Contain fibers from wood
  • Agricultural residue: Fibers from straw, grass or other annual plants
  • Recycled: Recycle or secondary Fiber

3 Based on Surface Treatment
  • Coated: Coated with clay or other mineral.
  • Uncoated: No coating
  • Laminated: aluminum, poly etc

Finish
  • Fine/Course
  • calendered/ supercalendered
  • Machine Finished (MF)/Machine Glazed (MG)
  • Glazed/Glossed


Comparative Analysis of Different Pulping Processes

Category 
Pulping process   
Chemical treatment    
Mechanical treatment    
pulp yield%                                                                                                                        
Mechanical

Ground wood
No treatment(sometimes steam treatment)
Grinder
Defibrator
93-98
Semi-chemical
Ground wood and steamed ground wood with acid sulphite,bisulphite
none
Grinder,refiner or hydropupler
60-98
Chemical
Process
Kraft(sulphate)
Soda
Acid sulphite
Bisulphate-acid sulphite
Kraft
Alkali
Acid sulphite
Bisulphate

None
None
None

40-55
40-55
40-60

Sindh paper industry

Paper industry
location
Raw material

Pulp process
products
Ddabhoy paper mill,security mills
karachi
Straw,cotton

Printing/writing paper
Allied paper mill, chilya cor-poration
thatta
straw

L,M
Dawn paper mill,orient strawboard,star paper mill
hyderabada
straw

L,M

Punjab Paper Mill

Paper industry
location
Raw material

Pulp process
products
International fib
khushab


Printing/wrinting paper
Thal paper
jaunharabad


newspaper
Farooki kraft
gujrat
wood
kraft
pulp
Jubilee+6
gujranwala
straw
soda
Textile cone stock
packages
lahore
Straw,khai
sulfite
Printing/writing paper,folding box,tissue
Century paper mill
kasur
Straw,bagasse
sulfite
Printing/writing paper,folding box
Crescent board
Faisalabad
bagasse
Thermo-mechanical pulping
Hard board,particle board
Flying paper mill
sheikhupura
straw
sulfite
Printing/writing paper,folding box

Paper Mills in Pakistan

Charsadda. NWFP:Pakistan paper cooperation

Pakistan paper cooperation was built in 1972 under government auspices,to produce 100 tons per day of printing/writing paper from bagasse.it adjoints charsadda sugar refinery.the pulp potential is 66,6000 tons per day.

                            

Nowshera,NWFP:Adamjee paper company

This company operate 2 machines,100 tons per day paper and board mill,the oldest in Pakistan.they produce about 60 TPD of neutral sulphite pulp from straw,khai,cotton,etc.they are using some popular and E.Camaaldulensis on trial basis.

Gujranwala,Punjab

There are six mills in this area producing about 32,000 TPA of paper or board and 20,000TPA
of lime soda pulp.67 TPD of these jubilee paper and board mills is the best and largest at 10,000 TPA pulp,15,000 TPA paper.these mills are primarily producing some stock for local textile industry.

Sheikkhpura,punjab

There are 12 mills in this locality grouped in close proximity one another of the sheikhupura-lahore highway.they range from 4,000-19,000 TPA pulp.total paper capacity is 93,000 TPA.
    
Flying paper mills
It is one of  the newest mills,the paper mill started up in 1986,the pulp mil in 1989.they have a capacity of 24,000 TPA printing/writing and sack kraft papers:14,000 TPA straw pulp.since start up,they have also been using imported pulp,thus producing excellent paper.pulpwood potential is 53,000 TPA.


  Lahore,Punjab

there are five mills in Lahore area,three operating now.total pulp wood potential is 235,000 TPA.

Packages limited

]Packages operate three machines producing 42,500 TPA of wide variety of grades including tissue,printing/writing and folding box.packages produce 60 TPD of neutral sulfite pulp,primarily from straw and khai.the pulpwood potential is 94,000 TPA.

Chunian,Kasur,Punjab:Centery Paper Mill

Century paper is the new mill.it has two paper machines producing printing/writing and folding box grades.it has capacity of 100-120 TPD.it produces bi-sulphite pulp from straw and bagasse.

Faisalabad,Punjab:crescent hardboard

They produce 24,000 TPA of hard board and particle board,its raw material is bagasse.it is owned by the crescent sugar company.



Karachi,Sindh

Two mills,Ddabhoy paper and security mills produce 3,500 TPA paper.Al-Noor sugar mill is interested to establish a bagasse based mill.the pulp wood potential of 11,000TPA is discounted.
                                          
Hyderabad-Kotri,Sindh

There are three mill,Dawn paper,Orient strawboard and star paper mills.these produces 11,000TPA and 7,500 TPA pulp.


Thatta,Sindh

Two existing mills,Allied Paper at Gharo chilya corperation produce 13,000TPA paper and 9,000TPA pulp.the announced pakland paper limited is stated at 30,000TPA capacity.

Nooriabad,Dadu,Sindh

City paper cooperation produces 7,200 TPA of corrugating medium,no pulp.

Paper industry in Pakistan

At the time of partition,there were 15 mills in the subcontinent producing a 100,000 tons of paper per year,but as it happened ,none of them was in the area that became Pakistan.and the new country had literally to start from scratch.every single sheet of paper had to imported for printing newspaper,producing schoolbooks,writing letters or carrying private or government business.

In the early years of our independence,we were spending annually three crores of rupees for imported paper apart from similarity heavy expenditure on imports of other business and basic necessities.

We have identified 41 mills in Pakistan,31operating,8 planned and 2 idle.they have the capicaty for producing about 465,000 TPA paper and 292,000 TPA pulp.these range from under 2000TPA toabout 30,000 TPA.they are all very small by modern standards.the primary fiber sources are wheat straw,khai with some baggase,cotton waste and other materials.There is no wood used with the expection of experiments in few miles.