Industrial-grade OPP plastic bag directional stretching technology can effectively improve physical properties

During the directional stretching process, the OPP film is subjected to stretching force in a specific direction, so that the polypropylene molecular chain is highly oriented along the stretching direction. This highly oriented molecular structure can more effectively transmit and disperse stress, thereby significantly enhancing the tensile strength and modulus of the film. This means that industrial-grade OPP plastic bags that have undergone directional stretching can withstand greater external forces without being easily broken, improving their durability and reliability in practical applications.
Improve transparency and gloss
In addition to enhancing physical strength, directional stretching can also improve the transparency and gloss of industrial-grade OPP plastic bags. During the stretching process, tiny bubbles and defects inside the film are stretched and discharged, making the film surface smoother and reducing the scattering of light inside the film, thereby improving transparency. At the same time, the highly oriented molecular structure can also enhance the reflection and refraction effects of light, making the film present a brighter gloss.
Optimize barrier properties
Directional stretching technology can also optimize the barrier properties of OPP film by changing its microstructure. The stretched film has a tighter molecular arrangement and fewer pores, which can effectively block the penetration of substances such as oxygen and moisture. This is especially important for packaging areas such as food and medicine that need to maintain product freshness and stability.
Improved dimensional stability
Industrial-grade OPP plastic bags that have undergone directional stretching have better dimensional stability. During the stretching process, the molecular chains of the film are rearranged and fixed, making the film less likely to shrink or deform during subsequent processing and use. This helps ensure that the appearance of the packaged product is neat and consistent, and improves the overall quality of the product.