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Pele Oy
Benchmarking of Best Folding Boxboards
7 February 2017
Pekka.Komulainen@clarinet.fi
1
Pele Oy
Preface
 This presentation aims to show a simple way to benchmark
the quality of FBB cartonboard (GC2) when only ...
Pele Oy
SELECTED BRANDS AND BENCHMARKING
PRINCIPLES
3
Pele Oy
Boxboard definitions
4
Table: Stora Enso
Pele Oy
The importance of cartonboard quality
 In the category of cartonboard no liquid packaging, cup or plate board is ...
Pele Oy
Example of multigrade board machine start-up
 Several new multigrade machines will produce FBB before focusing on...
Pele Oy
Typical wet end of a cartonboard machine
7
 Three layers and hydraulic headboxes. Top wire unit for middle ply.
...
Pele Oy
Coating section of a cartonboard machine
 Older slow machines can have MG dryer. New machines can have belt calen...
Pele Oy
Layout of coated barrier board
 After surface sizing there are two curtain coatings and one blade coating for pri...
Pele Oy
Opticom International Research rankings
 The Brand Tracking Survey – Cartonboard for consumer packaging 2016 defi...
Pele Oy
Benchmarking of FBB technical specifications
 It is interesting to benchmark the best FBB grades only by using
pu...
Pele Oy
Principles of benchmarking
 Selected grammages are about 200 and 250 gsm.
 The best brands have totally/partly i...
Pele Oy
FBB brands and cartonboard quality
 The trend has been lighter boxes, higher bulk and slightly lower gloss and sm...
Pele Oy
Benchmarking of FBB brands
 Critical properties for benchmark must be important for the converter but also such t...
Pele Oy
Comparison of Opticom’s rank and technical rank
 Opticom’s ranking in 2016 seems to be slightly different compare...
Pele Oy
Discussion of the benchmark criteria
 For every converter or brand owner the weight of the scores is different. T...
Pele Oy
Benchmarking with tolerances
 Some tolerances are very wide. It is interesting to see if the ranking is
same with...
Pele Oy
Benchmarking of FBB brands with tolerances
 It seems that Tambrite is still the best. Simcote is better than Perf...
Pele Oy
DIFFERENCES BETWEEN IGT AND SCOTT BOND
19
Pele Oy
Surface strength and delamination
 If coating layer is not strong enough, the
tacky ink pulls parts of coating aw...
Pele Oy
Offset printing nip
 Ink splitting causes high stresses close to the top surface in offset printing.
21
Picture: ...
Pele Oy
IGT test
 IGT test measures only force but not
deformation.
 In the commercial offset printing nip the stress is...
Pele Oy
Scott bond test
 When IGT measures only force, Scott bond measures energy i.e. the area under the
stress-strain c...
Pele Oy
Summary of comparison IGT vs. Scott Bond
 IGT measures only force but not deformation. Scott Bond measures
energy...
Pele Oy
Balance of board properties
 Good stiffness is very important when lighter weight cartonboards are used. When
bul...
Pele Oy
ORIGINAL AND CALCULATED QUALITY
SPECIFICATIONS BY GRAMMAGE
26
Pele Oy
Tambrite by Stora Enso Inkeroinen mill
 Tambrite specification shows improved bulk but decreased smoothness.
 Go...
Pele Oy
Tambrite original specification
28
Pele Oy
Incada Exel by Iggesund Workington mill
 Tambrite did not specify gloss. It is good that Incada has all of the sp...
Pele Oy
Double coated Incada Exel by Iggesund
30
Pele Oy
Performa Cream by Stora Enso Fors mill
 Some tolerances are very wide such as in roughness and Scott bond.
 Ther...
Pele Oy
Performa Cream – triple coated top
32
Pele Oy
Alaska Plus by IP Kwidzyn
 Alaska Plus has reduced gloss from 45 to 40% from the former Alaska, but bulk
and stif...
Pele Oy
Alaska Plus by International Paper Kwidzyn
34
Pele Oy
Metsä Board Simcote FBB
 Good bulk due to metal belt calender for base board
 Roughness is not the best
 Anisot...
Pele Oy
Metsä Board Simcote original specification
 Simcote is made without MG cylinder by using metal belt calender.
 H...
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FBB Benchmark 7 Feb 2017

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FBB Benchmark 7 Feb 2017

  1. 1. Pele Oy Benchmarking of Best Folding Boxboards 7 February 2017 Pekka.Komulainen@clarinet.fi 1
  2. 2. Pele Oy Preface  This presentation aims to show a simple way to benchmark the quality of FBB cartonboard (GC2) when only public technical specifications are available.  The benchmarked quality characteristics and their weights for the final evaluation are only my own judgement for a general case of high quality boxboard printed in offset.  How to make high quality is not very much discussed here, but I am interested and ready to receive consulting assignments – not only about cartonboards but all areas of paper and board manufacture.  My LinkedIn profile can be found by following this link:  https://fi.linkedin.com/pub/pekka-komulainen/12/896/a56 2
  3. 3. Pele Oy SELECTED BRANDS AND BENCHMARKING PRINCIPLES 3
  4. 4. Pele Oy Boxboard definitions 4 Table: Stora Enso
  5. 5. Pele Oy The importance of cartonboard quality  In the category of cartonboard no liquid packaging, cup or plate board is included.  According to CEPI the European consumption of cartonboards has been quite constant after 2007 (about 7 Mton). White lined chipboard of this has been about 3.5 Mton and FBB less than 2.5 Mton.  New high capacity virgin fiber multigrade board machines have just started or will be started in the near future:  Metsä Board Husum 2016 400 000 t/a multigrades  Kotkamills 2016 400 000 t/a multigrades  BillerudKorsnäs 2019 550 000 t/a multigrades  Together with smaller rebuilds the new capacity of virgin fiber machines will be about 1.5 Mton, which is 60% of the European consumption.  Even if this capacity would mainly be directed to the food service sector, this is in the beginning a huge addition to the cartonboard market. Last year Husum’s new machine produced only about 100 000 tons (25% of the final capacity).  In addition, considerable amount of new containerboard capacity has been added.  In this clear overcapacity situation the quality of the product will be most important. 5
  6. 6. Pele Oy Example of multigrade board machine start-up  Several new multigrade machines will produce FBB before focusing on food service sector (Kotkamills, StoraEnso Beihai). The following is an example of SE Beihai: 6
  7. 7. Pele Oy Typical wet end of a cartonboard machine 7  Three layers and hydraulic headboxes. Top wire unit for middle ply.  Two double felted presses and one smoothing press without felts for improving smoothness. Picture: Voith Paper
  8. 8. Pele Oy Coating section of a cartonboard machine  Older slow machines can have MG dryer. New machines can have belt calender.  Normally base paper is surface sized and calendered before coating.  Typically there are 2-3 blade coatings for the top layer and one for the back layer.  After coating there is 1-2 soft calender nips and cooling before winding. 8 Picture: Voith Paper
  9. 9. Pele Oy Layout of coated barrier board  After surface sizing there are two curtain coatings and one blade coating for printed surface (Valmet Kotkamills). Each curtain coating can have two layers.  All coatings are on-machine coatings. 9 Picture: Kotkamills
  10. 10. Pele Oy Opticom International Research rankings  The Brand Tracking Survey – Cartonboard for consumer packaging 2016 defining and ranking the most valuable virgin fiber cartonboard brands in Western Europe according to consumer goods brand owners: 10 2016 2014 2012 Pulp Wood 1 3 2 Incada FBB RMP SW Iggesund 2 1 3 Tambrite FBB PGW SW Stora Enso 3 2 1 Invercote SBB BHKP HW Iggesund 4 7 11 Carta range FBB CTMP HW Metsä Board 5 5 7 Simcote FBB GW/CTMP SW/HW Metsä Board 6 11 10 CKB SUB Kraft SW Stora Enso 7 6 5 Alaska Plus FBB CTMP HW/SW IP 8 8 8 Rochcoat/Blanc/Perle FBB Careo 10 9 9 Ensocoat SBB Kraft HW,SW Stora Enso 11 4 6 Performa FBB CTMP SW Stora Enso Ranking Middle ply Brand owner Brand Rank 2016 Grade
  11. 11. Pele Oy Benchmarking of FBB technical specifications  It is interesting to benchmark the best FBB grades only by using public technical information and to compare that with Opticom’s results.  Some grades are more common and interesting than the others. To get most relevant results only FBB grades were chosen.  Of course Tambrite and Incada as the best brands must be included. Simcote is also interesting due to the metal belt calender.  Performa with triple coating top side must be included.  After Opticom’s 2014 benchmark International Paper has launched a new lightweight grade Alaska Plus, which is interesting to be included.  Relevant comparability can be reached between Tambrite, Incada, Simcote, Performa Cream and Alaska Plus.  From the technical specifications it is difficult to get exactly same grammages. The maximum difference in grammage has been ±5 gsm. 11
  12. 12. Pele Oy Principles of benchmarking  Selected grammages are about 200 and 250 gsm.  The best brands have totally/partly integrated pulp production.  Importance of each property is weighed from 1 to 5. The weights are:  5 for CD stiffness, 4 for internal bond and smoothness, 3 for bulk, 2 for gloss and 1 for low MD/CD anisotropy.  Bulk is important. However, it got only 3 points because it is almost same as stiffness and stiffness is the final target.  For Scott bond delamination resistance 4 is given because it is difficult to get bulk and internal bond at the same time.  Gloss is smoothness in micro scale, but smoothness is more important – at least PPS in Europe.  Anisotropy is included to understand, how much CD stiffness is made with lower orientation. Given weight for stiffness anisotropy is only 1.  Performa probably has triple coated top side. Rest of the grades are double coated. Back sides of the selected grades are only surface sized (GC2). 12
  13. 13. Pele Oy FBB brands and cartonboard quality  The trend has been lighter boxes, higher bulk and slightly lower gloss and smoothness.  It is interesting to note that softwood mechanical pulp made with conventional pulping methods such as GW, PGW and RMP suits very well for middle ply. 13 Bulk Gloss Top Pulp type Wood cm3 /g CD, mNm MD/CD % coat Tambrite PGW SW 200 350 1,75 5,0 1,80 1,2 n/a 130 2 Incada exel RMP SW 200 310 1,55 3,7 2,30 0,9 50 140 2 Performa cream CTMP SW 200 310 1,55 3,5 2,37 1,0 45 145 3 Simcote GW/CTMP SW/HW 200 350 1,75 4,7 2,23 1,4 35 n/a 2 Alaska Plus CTMP HW, SW 205 350 1,71 5,0 1,98 1,3 40 100 2 Bulk Gloss Top Pulp type Wood cm 3 /g CD, mNm MD/CD % coat Tambrite PGW SW 250 460 1,84 9,8 1,85 1,2 n/a 130 2 Incada exel RMP SW 255 450 1,76 8,3 2,31 0,9 50 140 2 Performa cream CTMP SW 245 405 1,65 6,9 2,28 1,0 45 145 3 Simcote GW/CTMP SW/HW 250 450 1,80 9,7 1,98 1,4 35 n/a 2 Alaska Plus CTMP HW, SW 255 470 1,84 10,0 2,01 1,3 40 100 2 FBB Brands Middle ply gsm Thickness µm Siffness, Taber PPS µm FBB Brands Middle ply gsm Thickness µm Siffness, Taber PPS µm Bond J/m 2 Bond J/m 2
  14. 14. Pele Oy Benchmarking of FBB brands  Critical properties for benchmark must be important for the converter but also such that improving one property has negative effect to some other properties.  For each property there must be weight of importance because some properties are more important than the others. Weights are always dependent on converting and final usage of the grade. 14 Low number is better CD MD/CD Tambrite 1 2 1 3 5 3 15 Incada exel 4 4 4 1 1 2 16 Performa cream 5 5 5 2 2 1 20 Simcote 2 3 3 5 4 5 22 Alaska Plus 2 1 2 4 3 4 16 CD MD/CD Weihts 3 5 1 4 2 4 Tambrite 3 10 1 12 10 12 48 Incada exel 12 20 4 4 2 8 50 Performa cream 15 25 5 8 4 4 61 Simcote 6 15 3 20 8 20 72 Alaska Plus 6 5 2 16 6 16 51 Bulk Stiffness PPS Gloss Bond Total Bond Total Final points Bacis point Bulk Stiffness PPS Gloss
  15. 15. Pele Oy Comparison of Opticom’s rank and technical rank  Opticom’s ranking in 2016 seems to be slightly different compared to the technical ranking. Alaska Plus has improved technically but not in Opticom ranking.  Selected grades are all good. If you need an overall good grade it is Tambrite. If you need gloss and smoothness it is Incada. If you need Scott Bond take Performa. Alaska is good for CD stiffness but has low internal bond and smoothness.  If you need tonnage take Simcote but check internal bond. 15 Tambrite 48 1 Incada exel 50 2 Alaska Plus 51 3 Performa cream 61 4 Simcote 72 5 FBB Technical Rank 2016 Final rank Total points 2016 2014 2012 1 3 2 Incada 2 1 3 Tambrite 3 2 1 Invercote 4 7 11 Carta range 5 5 7 Simcote 6 11 10 CKB 7 6 5 Alaska Plus 8 8 8 Rochcoat/Blanc/Perle 10 9 9 Ensocoat 11 4 6 Performa Opticom Rank Brand Rank 2016
  16. 16. Pele Oy Discussion of the benchmark criteria  For every converter or brand owner the weight of the scores is different. This benchmarking tries to be an example of overall benchmark.  For example gloss is very important in Asia and North America. Expensive kaolin clay or even more expensive pigments must be used there.  Everybody should consider how consistent are the quality numbers of each supplier. As an example I would like to take PPS roughness and look what are the published tolerances. 16 Avg. of nominal and maximum Tambrite 1,2 ≤1,5 ≤1,35 Incada exel 0,9 ≤1,3 ≤1,10 Alaska Plus 1,3 <1,3 <1,30 Performa cream 1,0 ≤1,7 ≤1,35 Simcote 1,4 <1,4 <1,40 Roughness PPS Tolerance
  17. 17. Pele Oy Benchmarking with tolerances  Some tolerances are very wide. It is interesting to see if the ranking is same with tolerances.  Below are the critical properties with worst numbers from tolerances. 17 Bulk Gloss Top Pulp type Wood cm3 /g CD, mNm MD/CD % coat Tambrite PGW SW 200 350 1.68 4.5 1.80 1.5 n/a 100 2 Incada exel RMP SW 200 310 1.49 3.1 2.30 1.3 40 95 2 Performa cream CTMP SW 200 310 1.47 3.0 2.37 1.7 45 100 3 Simcote GW/CTMP SW/HW 200 350 1.70 4.2 2.23 1.4 33 n/a 2 Alaska Plus CTMP HW, SW 205 350 1.64 4.3 1.98 1.3 40 n/a 2 Bulk Glos Top Pulp type Wood cm3 /g CD, mNm MD/CD % coat Tambrite PGW SW 250 460 1.77 8.8 1.85 1.5 n/a 100 2 Incada exel RMP SW 255 450 1.69 7.2 2.31 1.3 40 95 2 Performa cream CTMP SW 245 405 1.57 5.8 2.28 1.7 45 100 3 Simcote GW/CTMP SW/HW 250 450 1.75 8.7 1.98 1.4 33 n/a 2 Alaska Plus CTMP HW, SW 255 470 1.77 8.7 2.01 1.3 40 n/a 2 FBB Brands Middle ply gsm Thicknes s µm Siffness, Taber PPS µm Bond J/m2 Bond J/m2FBB Brands Middle ply gsm Thickness µm Siffness, Taber PPS µm
  18. 18. Pele Oy Benchmarking of FBB brands with tolerances  It seems that Tambrite is still the best. Simcote is better than Performa cream when tolerances are taken into account. Alaska plus is also better than Incada with tolerances.  Anyway, the best and worst are the same brands as without tolerances. 18 Low number is better CD MD/CD Tambrite 1 1 1 4 5 1 13 Incada exel 4 4 4 1 2 3 18 Performa cream 5 5 5 5 1 1 22 Simcote 1 3 3 3 4 4 18 Alaska Plus 3 2 2 1 2 4 14 CD MD/CD Weihts 3 5 1 4 2 4 Tambrite 3 5 1 16 10 4 39 Incada exel 12 20 4 4 4 12 56 Performa cream 15 25 5 20 2 4 71 Simcote 3 15 3 12 8 16 57 Alaska Plus 9 10 2 4 4 16 45 Gloss Total Bond Total Final points Bacis point Bulk Stiffness PPS Bulk Stiffness PPS Gloss Bond
  19. 19. Pele Oy DIFFERENCES BETWEEN IGT AND SCOTT BOND 19
  20. 20. Pele Oy Surface strength and delamination  If coating layer is not strong enough, the tacky ink pulls parts of coating away. This is not very common case for FBB.  When coating and top ply are strong enough, there will be delamination between top ply and filler ply. This is most common case with bulky FBB cartonboards. 20
  21. 21. Pele Oy Offset printing nip  Ink splitting causes high stresses close to the top surface in offset printing. 21 Picture: KTH Lecture 8
  22. 22. Pele Oy IGT test  IGT test measures only force but not deformation.  In the commercial offset printing nip the stress is quite similar with IGT test.  The failure of the paperboard can be: 1. detachment of smaller particles of only coating or coating and fibers or coating and top ply 2. delamination between base board plies without total separation (corrugated surface) 3. total separation of base board plies. 22
  23. 23. Pele Oy Scott bond test  When IGT measures only force, Scott bond measures energy i.e. the area under the stress-strain curve. In the picture below are two Scott bond tests, where max. force is same but total energy very different. 23 Picture: KTH Lecture 8
  24. 24. Pele Oy Summary of comparison IGT vs. Scott Bond  IGT measures only force but not deformation. Scott Bond measures energy i.e. force and deformation.  IGT measures similar forces as printing nip i.e. combination of pulling and shear forces. Scott bond measures shear force, which is not as important for printing as pulling force in the nip.  IGT loads mainly the top side of the sheet while Scott bond is symmetric through the whole sheet.  Scott bond finds the weakest layer in z-direction, which normally is between filler ply and back ply (top/wire-side joint). IGT stresses top side more, and if the delamination is in the base board, it normally is between top ply and filler ply.  If IGT test shows base board delamination, it is important to increase the bond between top ply and filler ply, which may not be critical at all in Scott bond test.  All this means that the correlation between Scott bond and IGT can be very poor. 24 Topsidewithcoating Delamination
  25. 25. Pele Oy Balance of board properties  Good stiffness is very important when lighter weight cartonboards are used. When bulk is improved, internal bond can decrease and delamination problems are possible.  The only reason why Scott bond is used for benchmarking is that all suppliers specify Scott bond. However, studies should be made by using special IGT tests. 25 Bulk Stiffness Good level Bad level Bond Smoothness Delamination
  26. 26. Pele Oy ORIGINAL AND CALCULATED QUALITY SPECIFICATIONS BY GRAMMAGE 26
  27. 27. Pele Oy Tambrite by Stora Enso Inkeroinen mill  Tambrite specification shows improved bulk but decreased smoothness.  Good CD stiffness due to low fiber orientation  Balanced properties but no gloss specified  Wide tolerances 27 Property Unit Standard Toler. Grammage g/m² ISO 536 ± 4% 200 210 220 230 240 250 260 270 285 310 335 Thickness µm ISO 534 ± 4%, ±20 350 375 400 420 440 460 480 500 540 600 650 Bulk cm3 /g Calculated 1,75 1,79 1,82 1,83 1,83 1,84 1,85 1,85 1,89 1,94 1,94 Bending moment CD mNm Taber 15° ISO 2493 -0,1 5,0 5,9 6,8 7,8 8,8 9,8 11,0 12,3 14,6 18,5 22,4 Bending moment MD mNm Taber 15° ISO 2493 -0,1 9,0 10,7 12,4 14,3 16,2 18,1 20,5 23,0 27,6 35,5 43,7 Bending moment MD/CD Calculated 1,80 1,81 1,82 1,83 1,84 1,85 1,86 1,87 1,89 1,92 1,95 Roughness top PPS10 ISO 879 Max. 1,5 1,2 1,2 1,2 1,2 1,2 1,2 1,2 1,2 1,2 1,2 1,2 Brightness top %, Illumination C/2° ISO 2470 ± 2 86 86 86 86 86 86 86 86 86 86 86 Gloss %, Hunter 75° TAPPI T 480 Values
  28. 28. Pele Oy Tambrite original specification 28
  29. 29. Pele Oy Incada Exel by Iggesund Workington mill  Tambrite did not specify gloss. It is good that Incada has all of the specified figures even if the tolerances are wide.  The press section rebuild cannot be seen on the quality specification. 29 Property Unit Standard Toler. Grammage g/m² ISO 536 ± 4% 200 210 225 235 255 280 300 325 350 Thickness µm ISO 534 ± 4% 310 340 375 400 450 490 540 590 640 Bulk cm3 /g Calculated 1,55 1,62 1,67 1,70 1,76 1,75 1,80 1,82 1,83 Bending stiffness CD mNm Taber 15° ISO 2493 -15 % 3,7 4,6 5,9 6,6 8,5 10,8 13,2 16,8 19,8 Bending stiffness MD mNm Taber 15° ISO 2493 -15 % 8,5 10,6 13,6 15,2 19,6 24,9 30,3 38,7 45,5 Bending stiffness MD/CD Calculated 2,30 2,30 2,31 2,30 2,31 2,31 2,30 2,30 2,30 Internal bond (Scott) J/m2 TAPPI 569 ≥95 140 140 140 140 140 140 140 140 140 Roughness top PPS10 ISO 8791-4 ≤1,3 0,9 0,9 0,9 0,9 0,9 0,9 0,9 0,9 0,9 Brightness top %, Illumination C/2° ISO 2470 ± 2 91,5 91,5 91,5 91,5 91,5 91,5 91,5 91,5 91,5 Gloss top 75°, % ISO B254-1 -10 50 50 50 50 50 50 50 50 50 Values
  30. 30. Pele Oy Double coated Incada Exel by Iggesund 30
  31. 31. Pele Oy Performa Cream by Stora Enso Fors mill  Some tolerances are very wide such as in roughness and Scott bond.  There is no gloss tolerance available.  Bulk and stiffness are low due to the thicker total coating. 31 Property Unit Standard Toler. Grammage g/m² ISO 536 ± 4% 200 220 230 245 260 290 315 340 360 Thickness µm ISO 534 ± 4% 310 340 360 405 440 500 560 610 650 Bulk cm3 /g Calculated 1,55 1,55 1,57 1,65 1,69 1,72 1,78 1,79 1,81 Bending stiffness CD mNm Taber 15° ISO 2493 -15 % 3,5 4,5 5,4 6,8 8,2 11,1 14,5 18,1 20,3 Bending stiffness MD mNm Taber 15° ISO 2493 -15 % 8,3 10,8 12,8 15,5 18,6 24,6 32,4 39,8 44,9 Bending stiffness MD/CD Calculated 2,37 2,40 2,37 2,28 2,27 2,22 2,23 2,20 2,21 Internal bond (Scott) J/m2 TAPPI 569 ≥100 145 145 145 145 145 145 145 145 145 Roughness top PPS10 ISO 8791-4 ≤1,7 1,0 1,0 1,0 1,0 1,0 1,0 1,0 1,0 1,0 Brightness top %, Illumination C/2° ISO 2470 ± 1 90 90 90 90 90 90 90 90 90 Gloss top 75°, % Tappi 480 n/a 45 45 45 45 45 45 45 45 45 Values
  32. 32. Pele Oy Performa Cream – triple coated top 32
  33. 33. Pele Oy Alaska Plus by IP Kwidzyn  Alaska Plus has reduced gloss from 45 to 40% from the former Alaska, but bulk and stiffness are very much improved.  For roughness, gloss, and internal bond no tolerances are given. 33 Property Unit Standard Toler. Grammage g/m² ISO 536 ± 4% 190 205 220 235 255 270 280 305 330 Thickness µm ISO 534 ± 4% 320 350 385 425 470 500 520 570 620 Bulk cm3 /g Calculated 1,68 1,71 1,75 1,81 1,84 1,85 1,86 1,87 1,88 Bending stiffness CD mNm Taber 15° ISO 2493 ± 15% 3,9 5,1 6,2 7,7 10,2 11,6 13,1 16,1 19,8 Bending stiffness MD mNm Taber 15° ISO 2493 ± 15% 7,7 10,1 12,5 16,0 20,5 24,3 27,0 35,0 44,9 Bending stiffness MD/CD Calculated 1,97 1,98 2,02 2,08 2,01 2,09 2,06 2,17 2,27 Internal bond (Scott) J/m 2 TAPPI 569 >100 >100 >100 >100 >100 >100 >100 >100 >100 >100 Roughness top PPS10 ISO 8791-4 <1,3 <1,3 <1,3 <1,3 <1,3 <1,3 <1,3 <1,3 <1,3 Brightness top %, Illumination C/2° ISO 2470 ± 1 91 91 91 91 91 91 91 91 91 Gloss top 75°, % Tappi 480 >40 >40 >40 >40 >40 >40 >40 >40 >40 Values
  34. 34. Pele Oy Alaska Plus by International Paper Kwidzyn 34
  35. 35. Pele Oy Metsä Board Simcote FBB  Good bulk due to metal belt calender for base board  Roughness is not the best  Anisotropy is quite high  Internal bond strength is not published 35 Property Unit Standard Toler. Grammage g/m² ISO 536 ± 2% 200 210 225 235 250 260 275 290 315 340 Thickness mm ISO 534 ± 3% 350 375 400 425 450 475 500 550 600 650 Bulk cm3 /g Calculated 1,75 1,79 1,78 1,81 1,80 1,83 1,82 1,90 1,90 1,91 Bending stiffness CD mNm Taber 15° ISO 2493 ± 10% 4,7 5,8 7,0 8,4 9,7 11,0 12,6 15,8 18,9 22,1 Bending stiffness MD mNm Taber 15° ISO 2493 ± 10% 10,5 12,1 15,0 17,0 19,2 22,6 25,2 31,0 37,8 45,2 Bending stiffness MD/CD Calculated 2,23 2,09 2,14 2,02 1,98 2,05 2,00 1,96 2,00 2,05 Roughness top PPS10 ISO 879 Max. 1,4 1,4 1,4 1,4 1,4 1,4 1,4 1,4 1,4 1,4 Brightness top %, Illumination C/2° ISO 2470 ± 1 84 84 84 84 84 84 84 84 84 84 Gloss %, Hunter 75° TAPPI T 480 ± 5 35 35 35 35 35 35 35 35 35 35 Values
  36. 36. Pele Oy Metsä Board Simcote original specification  Simcote is made without MG cylinder by using metal belt calender.  Higher production speed is possible, but combination of CD stiffness and roughness is not as good as with smaller machines and MG cylinder. 36

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