CPE film, the full name of which is cast polyethylene film, is a type of polyethylene film produced through the casting process. It is one of the most fundamental and widely used inner heat-sealing materials in the flexible packaging field.
With its irreplaceable excellent heat-sealing property, outstanding flexibility, reliable moisture-proof ability and high cost performance, it has become an indispensable inner heat-sealing and protective layer for the vast majority of composite packaging bags. Its application has permeated every aspect of our lives, from daily snacks to household chemicals.
The performance advantages of CPE film make it an ideal inner layer heat-sealing material.
Low heat sealing temperature:
It can start heat sealing at relatively low temperatures.
High heat sealing strength:
The seal is firm and can withstand the weight of the contents and impacts during transportation.
Wide heat sealing window:
The heat sealing temperature range is wide, which is conducive to the stable operation of high-speed packaging machines.
Good heat tackiness:
It has a certain strength before completely cooling after heat sealing, preventing the contents from bursting the seal.
Extremely soft, resistant to folding and dropping, and maintains good toughness at low temperatures, making it less prone to cracking. It is highly suitable for packaging that requires excellent impact resistance.
It is an excellent moisture-proof material, effectively preventing the contents from getting damp or losing moisture.
High transparency, meeting the display requirements of general packaging.
Non-toxic and odorless, resistant to acids, alkalis, and oils, meeting the hygiene standards for food and pharmaceutical packaging.
Relatively low raw material cost and mature production process, making it a highly cost-effective inner layer material.
Product Name | CPE Film | |||||||||
Testing Item | Unit | Index Value | Typical Values | Testing Method | ||||||
Thickness | μm | ±3.5% | 30 | 40 | 50 | 60 | 70 | 80 | GB6672-2001 | |
Tensile Strength | MD | Mpa | ≥22 | 28 | 30 | 31 | 33 | 30 | 31 | GB/T1040.3-2006 |
TD | Mpa | ≥20 | 24 | 23 | 24 | 25 | 25 | 26 | GB/T1040.3-2006 | |
Elongation at break | MD | % | ≥650 | 753 | 792 | 789 | 842 | 922 | 1020 | GB/T1040.3-2006 |
TD | % | ≥700 | 1156 | 1268 | 1193 | 1197 | 1268 | 1220 | GB/T1040.3-2006 | |
Wetting Tension | Treated side | mN/cm | ≥38 | 38 | 38 | 38 | 38 | 38 | 38 | GB/T 14216-2008 |
Heat seal temperature | ℃ | - | 115 | 120 | 120 | 120 | 120 | 120 | GB/T 19789-2005 | |
Heat seal strength | N/15mm | - | ≥6 | ≥8 | ≥8 | ≥8 | ≥8 | ≥8 | GB/T 26253-2010 | |
Haze | % | ≤6.0 | 2.9 | 3.2 | 3.74 | 4.02 | 5 | 5.2 | GB/T 2410 | |
