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Coated Kraft Back GC-4 (CKB)

Description

Coated Kraft Back GC-4 (CKB) is a coated board with kraft back for packaging producrion.

  • Bottom Layer made from solid unbleashed sulfate virgin kraft fiber
  • Triple layers of Clay coating
  • Hard Sizing for Cold storage Food and Beverage packaging
  • High Stiffness
  • High Gloss

STRUCTURE

3 times coated top layer

Top: Bleached chemical pulp

Middle: Mechanical pulp

Bottom: Unbleached chemical pulp

Hard Sizing

 

Basic usage

All types of packaging

Parameter

Unit

 Standard / Method                
Basis Weight gsm ISO 536   200 235 255 280 300 325 350
Caliper pt     12.0 14.0 16.0 18.0 20.0 22.0 24.0
μm ISO 534   305 356 406 457 508 559 610
ISO Brightness % ISO 2470-1   85±2 85±2 85±2 85±2 85±2 85±2 85±2
Bulk cm3/g ISO 534   1.52 1.51 1.59 1.63 1.69 1.72 1.74
Bending Stiffness mNm ISO 2493 MD 9 11 17 24 29 36 42
CD 4.5 6 9 11 14 17 20
Taber Stiffness gf·cm T489 MD 110 122 168 238 292 397 428
CD 60 72 87 112 140 186 204
Tear Dry gf T414 MD 138 150 167 180 207 268 288
CD 135 148 168 197 224 229 252
Tear Wet gf T414 MD 35 42 51 59 68 73 84
CD 39 45 55 74 75 84 92
Gloss75° % ISO 8254   ≥45 ≥45 ≥45 ≥45 ≥45 ≥45 ≥45
Ink absorption % K&N   20±3 20±3 22±3 22±3 22±3 22±3 22±3
Internal Bond Strength J/m2 TAPPI 833 pm-94   ≥150 ≥150 ≥130 ≥130 ≥130 ≥130 ≥130
Moisture %     7.5±0.5 7.5±0.5 8.0±1 8.0±1 8.0±1 8.0±1 8.0±1
Surface Printing Intensity m/s ISO 3783   ≥1.5 ≥1.5 ≥1.5 ≥1.5 ≥1.5 ≥1.5 ≥1.5
Folding Endruance times     ≥100 ≥100 ≥100 ≥100 ≥100 ≥100 ≥100
Bursting Index kPa.m2/g     2 2 2 2 2 2 2
Ring Crush Compression N.m/g     12.0 12.0 12.0 12.0 12.0 12.0 12.0
Tearing Strength mN     1400 1700 1900 2100 2400 2600 3600
Water Absorption g/m2     ≤30 ≤35 ≤35 ≤35 ≤35 ≤35 ≤35

 

MD - Machine Direction
CD - Cross Direction


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197198, Russia, St. Petersburg,
Maliy prospect P.S., 5,
BC Petrovsky Dvor, office 401
Tel./Fax:
+7 (812) 317-77-17
e-mail:
info@prime-route.com
www.prime-route.ru