Coreboard

Coreboard

Biltube is a leading manufacturer of specialty high-strength coreboard, trusted by industries worldwide for precision winding and converting applications. For over four decades, we’ve invested in cutting-edge research and proprietary manufacturing technology to deliver coreboard solutions that reduce costs, enhance product quality, and support demanding performance requirements.

Why Biltube Coreboard

Our world-class quality systems and rigorous testing ensure uniform strength and consistency in every batch. By enabling high performance in end products—from paper and film cores to tubes, cones, and edge protectors-Biltube coreboard helps minimize material loss, improve operational efficiency, and deliver long-term value for our customers.

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Requirements & Specifications

  • IRIS
  • SNOWDROP
  • VIOLET
  • ACACIA
  • CYPRESS
  • HAZEL
  • ASTER
  • LILAC
  • OLIVE

IRIS - Paper Grade for Partially Oriented Yarn (POY) Paper Tubes

POY Paper Tube Requirements
  • Yarn Winding Speed 3000 to 4000 mpm
  • Dimensional stability for automated winders
  • Enhanced horizontal strength to sustain yarn tension and package weight
  • Excellent vertical strength to eliminate damage during transportation and auto handling
  • Smooth surface for complete unwinding of yarn
  • Recyclability
Salient Features of Paper
  • Consistency in dimensional parameters
  • Availability in wide range of bulk to achieve required dimensions at the tube winding stage
  • Considerable tensile strength for better run-ability on machine
  • Minimum dimensional variation in changing ambient conditions
  • Special measures to achieve greater horizontal and vertical strength
  • Ideal surface for uniform adhesive application & bonding
Paper Specification
Physical Properties Unit Specification
Bulk cm³/g 1.40-1.45
Basis Weight g/m² 350-450
Moisture Content % 5 to 7
Cobb g/m² 150-250

SNOWDROP – Paper Grade for Fully Drawn Yarn (FDY) Paper Tubes

FDY Paper Tube Requirements
  • Yarn Winding Speed 4000 to 6000 mpm
  • Dimensional conformity
  • Distinct top layer paper and adhesive to prevent tube bursting at start up
  • Resilient tube to withstand yarn tension at 6000 mpm winding speed
  • Superior vertical strength to eliminate damage during transportation and auto handling
Salient Features of Paper
  • Congruity in dimensional specifications
  • Desire bursting strength to avoid tube shrinkage & delamination
  • Apt tensile strength for better runnablity on machine
  • Controlled moisture content for better gluablity
  • Improved specification for horizontal and vertical strength
  • Appropriate stiffness
  • Desired surface for uniform adhesive application
Paper Specification
Physical Properties Unit Specification
Bulk cm³/g 1.30-1.40
Basis Weight g/m² 230-450
Moisture Content % 5 to 7
Cobb g/m² 150-250

VIOLET – Paper Grade for Nylon Paper Tubes

Nylon Paper Tube Requirements
  • Non-shrinkage tube
  • Dimensional Stability
  • Tube should not sag and change dimensionally after winding of nylon yarn
  • High horizontal strength to withstand yarn tension
  • Perfect bonding of layers to sustain contact roller pressure
  • Bottom layer hardness to resist chuck pressure due to high yarn tension
  • Greater recyclability
Salient Features of Paper
  • Consistency in dimensional parameters
  • High slit roll tension for tight winding of tube
  • High resilience
  • Better surface for uniform adhesive application & bonding
  • Good tensile strength for better runnability on machine
  • Controlled moisture content for better gluability
  • Superior horizontal and vertical strength
  • Inbuilt hardness to withstand chuck pressure
Paper Specification
Physical Properties Unit Specification
Bulk cm³/g 1.30-1.35
Basis Weight g/m² 450-500
Moisture Content % 5 to 7
Cobb g/m² 100-200

ACACIA – Paper Grade for Draw Textured Yarn (DTY) Paper Tubes

DTY Paper Tube Requirements
  • Yarn winding speed 600 to 1100 mpm
  • Straightness to avoid vibration during yarn winding
  • Smooth surface to eliminate layer falling
  • Superior strength to sustain pressure during long doffing time
  • High vertical strength for damage free transportation and storage
  • Exceptional dimensional stability
Salient Features of Paper
  • Distinct surface for uniform adhesive application
  • Controlled moisture content for better gluablity
  • Minimum dimensional variability even in changing ambient conditions
  • Consistency in dimensional parameters
  • Smooth surface for uniform glue application
  • Greater horizontal and vertical strength
  • Greater tensile strength for better runnability on machine
Paper Specification
Physical Properties Unit Specification
Bulk cm³/g 1.35-1.40
Basis Weight g/m² 230-300
Moisture Content % 5 to 7
Cobb g/m² 200-300

CYPRESS – Paper Grade for Paper and Paper Board Core

Paper & Paper Board Core Requirements
  • Thickness 10 to 15 mm & strength 1500 to 2000 N/100 mm
  • Dimensional Stability
  • Straightness across the length to avoid vibration of paper core
  • Controlled moisture for shrink free performance
  • Solidity
  • Bottom layer hardness to resist chuck pressure at high speed winding
  • Reusability
Salient Features of Paper
  • Consistency in dimensional parameters
  • Controlled moisture content for better gluability
  • Better surface for uniform adhesive application
  • Good tensile strength for better runnability on machine
  • Better tear resistance
  • Improved technology for better horizontal and vertical strength
  • Availability in higher bulk for weight reduction to facilitate cost reduction in core
Paper Specification
Physical Properties Unit Specification
Bulk cm³/g 1.40-1.45
Basis Weight g/m² 350-530
Moisture Content % 5 to 7
Cobb g/m² 200-300

HAZEL – Paper Grade for Writing, Printing & Tissue Paper Core

Writing, Printing & Tissue Paper Core Requirements
  • Thickness 12 to 15 mm & strength 2500 to 3500 N/100 mm
  • Stable Dimensions
  • Straightness across the length to avoid vibration
  • Low moisture to shrink free performance
  • Firm bottom layer to resist chuck pressure at high speed winding
  • High horizontal crush to avoid shrinkage
  • Exceptional beam strength
Salient Features of Paper
  • Dimensional accordance
  • Adequate moisture content for better gluability
  • High slit roll tension for tight winding of core
  • Fitting surface for even glue application and uniform bonding
  • Special measures to achieve greater horizontal and vertical strength
Paper Specification
Physical Properties Unit Specification
Bulk cm³/g 1.40-1.45
Basis Weight g/m² 350-530
Moisture Content % 5 to 7
Cobb g/m² 200-300

ASTER – Paper Grade for News print Paper Core

News Print Paper Core Requirements
  • Thickness 14 to 15 mm & strength 3500 to 4000 N/100 mm
  • Dimensions adherence
  • Straightness across the length to avoid vibration of paper core
  • Low moisture for shrink free performance
  • Extra hard bottom layer to resist chuck pressure at high speed winding
  • Advanced horizontal crush to avoid shrinkage
Salient Features of Paper
  • Consistent dimensional parameters
  • Minimum variation with changing environmental conditions
  • Compelling slit roll tension for tight winding of core
  • Appropriate stiffness
  • Better tear resistance
  • Improved gluability
  • Higher edge compression
  • Smooth surface for even glue application
  • Greater horizontal and vertical strength
Paper Specification
Physical Properties Unit Specification
Bulk cm³/g 1.40-1.45
Basis Weight g/m² 350-530
Moisture Content % 5 to 7
Cobb g/m² 200-300

LILAC – Paper Grade for Film Core

Film Core Requirements
  • Thickness 8 to 18 mm & strength 2000 to 3500 N/100 mm
  • Dimensions stability for automated core handling equipment
  • Oval free to prevent film stretching and web break
  • Linearity across the length for uniform winding tension & smooth unwinding
  • Conditioned to prevent core shrinkage and loose winding
  • Waviness free surface
  • Minimum spiral gap width to avoid gap sensation on film
Salient Features of Paper
  • Consistent dimensional parameters
  • Regulated moisture content for better gluability
  • Better surface for uniform application and bonding
  • Higher tensile strength for better runnability on machine
  • Improved technology for better horizontal and vertical strength
  • Availability in higher bulk for weight reduction to facilitate cost reduction
Paper Specification
Physical Properties Unit Specification
Bulk cm³/g 1.40-1.45
Basis Weight g/m² 350-530
Moisture Content % 5 to 7
Cobb g/m² 150-250

OLIVE – Paper Grade for Paper Cone

Paper Cone Requirements
  • Dimensional accuracy for efficient functioning of high speed automated winders
  • Round and balanced to avoid bouncing and vibration during high speed winding
  • Velvet surface to facilitate complete un-winding of the yarn
  • Enhanced horizontal strength to sustain yarn tension during winding
  • Improved vertical strength to avoid damages during handling and transportation
  • Appropriate paper absorption characteristics to avoid bleeding of ink and collapsing of cones during steaming
  • Precise notch, groove and suitable edges to facilitate yarn winding and to prevent tail loss
  • Suitable inner groove to assist easy anti nesting of cones during winding
Salient Features of Paper
  • Consistent dimensional parameters
  • Special characteristics to achieve greater horizontal and vertical strength
  • Ideal surface to facilitate proper adhesive application and bonding
  • Superior ring crush and higher tensile strength for better runability on machine
  • Suitable absorption properties
  • Adequate stiffness to support notching and grooving of cones
Paper Specification
Physical Properties Unit Specification
Bulk cm³/g 1.40-1.45
Basis Weight g/m² 300-350
Moisture Content % 5 to 7
Cobb g/m² 200-300
  • Applications

Paper

Film

Textile

FMCG