Cast stretch films are categorized primarily by thickness, width, length, weight, and intended use, with various specifications designed to meet diverse cargo packaging and transport requirements. Typically manufactured from linear low-density polyethylene (LLDPE), these films offer excellent stretchability and stability and can be customized to meet specific customer needs.
Regarding thickness, common specifications include 12μm, 15μm, 17μm, 20μm, 23μm, 25μm, and 30μm. Thinner films are ideal for packaging lightweight goods, offering material savings and operational flexibility, while thicker films provide superior puncture resistance and load-bearing capacity, making them suitable for heavy products, palletized loads, and industrial packaging applications.
Common width specifications include 300mm, 450mm, 500mm, and 1000mm. The 500mm width is the most widely used, accommodating the majority of pallet and carton packaging needs. Custom widths are also available to suit specific packaging equipment and cargo dimensions, thereby enhancing packaging efficiency and material utilization.
In terms of length and roll weight, cast stretch films are designed to suit either manual or machine-based packaging processes. Hand-wrap films are typically lighter for ease of manual handling, whereas machine-wrap films feature greater lengths and weights, making them suitable for continuous use on automated packaging lines. Additionally, parameters such as core inner diameter, stretch ratio, and self-adhesion properties can be adjusted to meet the specific requirements of sectors ranging from logistics and warehousing to industrial manufacturing.