As we all know, stretch film effectively protects commodities from collisions and damage. But what specific properties enable this protection? Read on with stretch film manufacturers to find out!

1. Reliable Mechanical Protection Performance

This property prevents goods from leaking during packaging and avoids damage or contamination caused by foreign matter entering the package. It directly reflects the film’s functional indicators, mainly its mechanical strength—such as tensile strength, tear strength, drop impact strength, and puncture resistance. The higher the strength value, the better the fixing and protective effect.

2. Adhesion Strength

Good adhesion strength is also essential for maintaining product protection. Insufficient adhesion creates gaps that become critical flaws: the stretch film will lose its protective effect on goods if the packaging breaks. Regular polypropylene stretch film offers good mechanical strength but poor adhesion. Generally, the higher the adhesion strength, the better the film’s bonding performance.

3. Other Key Properties

For comprehensive commodity protection, the film also requires barrier and light-shielding functions:

• Barrier Performance: It blocks gases such as oxygen, carbon dioxide, and nitrogen, as well as odors and water vapor. When the scope is unspecified, it typically refers to the barrier against non-polar gases. Stretch film is a crucial factor for the effective storage of packaged goods, and different products have varying barrier requirements.
• Light-Shielding Performance: This is vital for packaging certain commodities, especially since ultraviolet (UV) light is a major cause of discoloration, fading, and photooxidation of some substances. Light-shielding performance is measured by light transmittance at a given wavelength—higher transmittance means poorer light-shielding ability.

Article Title: Stretch Film Manufacturers Share Key Properties That Enable Excellent Commodity Protection URL: https://en.szxylp.com/news/industry-news/stretch-film-manufacturers-share-key-properties-that-enable-excellent-commodity-protection.html