High-strength Kraft Paper

UFOPAK™

High-strength Kraft Paper

Available in both pristine Bleached White for a clean, premium presentation, and Natural Unbleached (Brown) for an eco-friendly, artisanal brand identity.

KEY BENEFITS

Extreme Burst Resistance - Optimized long-fiber matrix prevents rupture under heavy loads and rough handling.
High-Speed Filling - Excellent porosity allows rapid air evacuation during fast powder filling (e.g., cement, flour).
Consistent Runnability - Strict web tension control minimizes downtime on automated bag-making machines.
Sustainable Strength - 100% recyclable, biodegradable, and available with FSC/PEFC certifications.

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Grammage

80 - 90 g/m² (±5%)

Moisture

6% (±1)

Thickness

100 - 110 µm (±5)

Smoothness (PS / RS)

PS: ≥ 25 S / RS: ≤ 25 S

Tensile Strength (MD / CD)

MD: ≥ 6.0-6.5 kN/m / CD: ≥ 3.5-4.0 kN/m

Cobb Value

≤ 30 g/m²

Tearing Resistance (MD / CD)

MD: ≥ 700-800 mN / CD: ≥ 750-850 mN

Bursting Strength

≥ 350 - 400 kPa

Wet Tensile Strength (MD)

≥ 0.3 kN/m

Interlayer Adhesion

≥ 550 J/m²

Dust Degree (0.3-1.5mm²)

≤ 10 /m²

Negative

Odour

Core Performance Features

Engineered for Extreme Loads

Unmatched Burst Resistance

Formulated with a high percentage of long wood fibers to maximize tensile energy absorption. Safely prevents bag breakage during heavy lifting and rough transit.

High-Speed Filling Efficiency

Engineered with optimal porosity to allow trapped air to escape rapidly during high-speed powder filling operations, effectively eliminating sack blowouts.