CPP Films

Cast polypropylene (CPP) films are a type of flexible packaging material made from polypropylene polymers. These films are produced using the cast film extrusion process, where melted polypropylene resin is extruded through a flat die and then cast onto a chill roll to form a thin, continuous film. CPP films offer several advantages due to the unique properties of polypropylene polymers:

Characteristics

Clarity: CPP films typically have excellent optical clarity, making them ideal for applications where product visibility is important, such as food packaging.
Flexibility: These films are highly flexible and conformable, allowing them to be easily formed and wrapped around products of varying shapes and sizes.
Sealability: CPP films can be heat-sealed to create strong and secure seals, making them suitable for packaging applications that require hermetic sealing to maintain product freshness and integrity.
Heat Resistance: Polypropylene has a relatively high melting point, which gives CPP films good heat resistance. This property makes them suitable for applications where heat sealing or high-temperature processing is involved.

1. 5. Moisture Barrier: CPP films have inherent moisture barrier properties, helping to protect packaged products from moisture ingress and extending their shelf life.
2. 6. Chemical Resistance: Polypropylene is resistant to many chemicals, oils, and greases, making CPP films suitable for packaging applications involving contact with various substances.
3. 7. Printability: CPP films can be easily printed using various printing techniques, allowing for attractive graphics and branding on packaging materials.
4. 8. Tear Resistance: CPP films exhibit good tear resistance, providing durability and toughness to packaged products during handling and transportation.

Technical Data Sheet

PROPERTIES		TEST METHOD	UNIT	CPH1-LSIMD
PHYSICAL
Thickness		ASTM D374	Micron	15	18
Yield		JPFTM	m2/kg	73.26	61.05
Grammage		JPFTM	gm/m2	13.65	16.38
MECHANICAL
Tensile Strength	(MD) Min (TD) Min	ASTM D882 ASTM D882	kg/cm2 kg/cm2	450 – 650 200 – 300	450 – 650 200 – 300
Elongation	(MD) (TD)	ASTM D882 % ASTM D882 %		450 – 600 550 – 650	450 – 600 550 – 650
Coefficient of Friction(Metal to Film) Max	Dy (Max)	ASTM D1894	kinetic	0.3 -0.35	0.3 -0.35
THERMAL
Seal Initiation temperature		JPFTM	°C	95	95
Seal strength		JPFTM	gms/25mm	1000	1100
SURFACE
Release force(Tesa tape -7475, @300 mm/min, 180° peeling)		FINAT 10	gm/inch	2.2	2.2
BARRIER
Water Vapour Transmission Rate (38°C & 90% RH)	Max	ASTM E398	g/m2/day	< 1.2	< 1.2
Oxygen Gas Transmission Rate (23°C & 0% RH)	Max	ASTM D3985	cc/m2/day	< 150	< 150

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