In recent years, stretch film has been increasingly applied in product packaging, and the number of consumers purchasing products has also been continuously increasing. However, most buyers have a common concern: What kind of stretch film is considered good? Is there any simple and quick way to determine its quality?
Sino topway packaging company will show you four methods to identify the quality of stretch film:
Stretch Range of Stretch Film: The stretch range refers to the maximum stretch that can be applied while maintaining all necessary properties for a specific application. The stretch range varies depending on the application. A larger stretch range means less film usage and lower packaging costs.
Stretching Capability of Stretch Film: Stretching capability is the ability of the film to elongate elastically when subjected to tensile force. Increased longitudinal stretching will ultimately result in thinner film and a narrower width. While longitudinal stretching is beneficial, excessive stretching is often undesirable as it thins the film, making it prone to tearing and increasing the tension applied to the packaged items. With such stretching performance, items can be better packaged.
Self-Adhesiveness of Stretch Film: The adhesion between films after contact, during and after the stretching and wrapping process, ensures that the packaged products are securely fastened and do not become loose. Self-adhesiveness is influenced by various external factors such as humidity, dust, and contaminants. There are two main methods to obtain self-adhesive film: one is to process a smooth and glossy film surface; the other is to use additives that increase adhesion, creating a wetting effect on the film surface and thereby enhancing adhesion.
Toughness of Stretch Film: Toughness is the combined property of puncture resistance and tear resistance of the film. Tear resistance refers specifically to the degree of resistance to tearing when the film is under tension and punctured. The critical value for tear resistance must be taken in the transverse direction, i.e., perpendicular to the machine operation direction, because tearing in this direction will cause the packaged items to become loose. Even if tearing occurs longitudinally, the packaged items can remain securely fastened. Therefore, the better the toughness of the stretch film, the higher its quality.
Sino topway packaging company is a Chinese manufacturing and service company specializing in the research and development, design, production, sales, and service of polyethylene packaging films. It is one of the key high-tech enterprises in the domestic polyethylene packaging film manufacturing industry, known for its rapid development and large scale. The company's new packaging material products are exported to both domestic and international markets, earning widespread praise and trust from customer
