Complaint
Production of BOPP film is made from polypropylene polymer melt through the long and narrow nose first sheet or thick film, and then within the special drawing machine, under certain temperature and the set speed, at the same time two or step by step in the vertical direction (vertical, horizontal) on the drawing, and through the appropriate cooling or heat treatment or special processing (such as corona, coating, etc.) made of thin film.
The abbreviation of BOPP is "Biaxially Oriented Polypropylene", BOPP film is two-way stretch Polypropylene film. Production of BOPP film is made from polypropylene polymer melt through the long and narrow nose first sheet or thick film, and then within the special drawing machine, under certain temperature and the set speed, at the same time two or step by step in the vertical direction (vertical, horizontal) on the drawing, and through the appropriate cooling or heat treatment or special processing (such as corona, coating, etc.) made of thin film.
| NO. | Item | Unit | Index | Remarks | |||
| Size deviation | |||||||
| 1 | Width deviation | 50~150 | mm | ±0.5 | - | ||
| 151~400 | ±1.0 | - | |||||
| 401~1200 | ±1.5 | - | |||||
| 2 | Maximum thickness deviation | 12~19μm | % | ±5.0 | - | ||
| 20~29μm | ±4.0 | - | |||||
| 30~50μm | ±3.0 | - | |||||
| Physical and mechanical properties | |||||||
| Ordinary heat sealable film | Shrinkage heat sealable film | - | |||||
| 1 | Tensile strength | Vertical | MPa | ≥125 | ≥130 | - | |
| Horizontal | ≥220 | ≥240 | - | ||||
| 2 | Elongation at break | Vertical | % | ≤200 | ≤200 | - | |
| Horizontal | ≤80 | ≤70 | - | ||||
| 3 | Hot-shrinkage rate | vertical | % | ≤5.0 | >5 | - | |
| horizontal | ≤4.0 | >4 | - | ||||
| 4 | Young modulus | Vertical | MPa | 1800 | >2000 | 5mm/min | |
| 5 | Haze | % | ≤3.5 | ≤2.5 | - | ||
| 6 | Coefficient | - | ≤0.5 | ≤0.4 | Single side | ||
| 7 | Ultimate strength | N/15mm | ≥2.0 | ≥2.0 | (135±5)ºC·0.18MPa·1s | ||
| 8 | Luster(45º)% | - | ≥80 | ≥85 | - | ||
| 9 | Wetting tension | mN/m | - | - | Conform with contract | ||
| 10 | WVT | g/(m2·24h·0.1mm) | ≤2.0 | ≤2.0 | - | ||
