Polypropylene Coil

PP Coil is composed of isotactic polypropylene with high crystallinity, provided in roll form for conversion into sheets, films, and laminates. It exhibits high stiffness, chemical inertness, and resistance to fatigue and environmental stress cracking. Widely used in laboratory trays, signage backing, industrial packaging, and capacitor films, it is also applied in multilayer labels, thermal-insulating containers, and cleanroom-compatible handling sheets. Specific R&D applications include studies on semicrystalline morphology under shear, recyclable polyolefin systems, and thermal degradation behavior under oxidizing conditions. Its consistent melt flow rate and adaptability to both extrusion and thermoforming processes enhance its scientific value in polymer engineering, packaging prototyping, and environmental materials design.

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Tolerance

Properties

Reference & Citations

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Tolerances

Coil

Thickness		±20%

Material Properties for Polymers

Chemical Resistance

Element	Value
Acids - concentrated	Good-Fair
Acids - dilute	Good-Fair
Alcohols	Good
Alkalis	Good
Aromatic hydrocarbons	Fair
Greases and Oils	Good-Fair
Halogenated Hydrocarbons	Good-Poor
Halogens	Poor
Ketones	Good

Mechanical Properties

Element	Value
Coefficient of friction	0.1-0.3
Hardness - Rockwell	R80-100
Elongation at break( % )	150-300, for biax film >50
Tensile modulus( GPa )	0.9-1.5, for biax film 2.2-4.2
Izod impact strength( J m⁻¹ )	20-100
Abrasive resistance - ASTM D1044( mg/1000 cycles )	13-16
Tensile strength( MPa )	25-40, for biax film 130-300,

Electrical Properties

Element	Value
Dielectric constant @1MHz	2.2-2.6
Dissipation factor @ 1MHz	0.0003-0.0005
Dielectric strength( kV mm⁻¹ )	30-40
Surface resistivity( Ohm/sq )	10¹³
Volume resistivity( Ohmcm )	10¹⁶-10¹⁸

Physical Properties

Element	Value
Flammability	HB
Radiation resistance	Fair
Refractive index	1.49
Resistance to Ultra-violet	Poor
Limiting oxygen index( % )	18
Water absorption - equilibrium( % )	0.03
Density( gcm⁻³ )	0.9

Thermal Properties

Element	Value
Heat-deflection temperature - 0.45MPa( C )	100-105
Heat-deflection temperature - 1.8MPa( C )	60-65
Lower working temperature( C )	50
Upper working temperature( C )	90-120
Specific heat( J K⁻¹ kg⁻¹ )	1700-1900
Thermal conductivity( W m⁻¹ K⁻¹ )	0.1-0.22@23°C
Coefficient of thermal expansion( x10⁻⁶ K⁻¹ )	100-180