Testing Thermal Shrinkable Films for Bulk Packaging

Thermal shrinkable film has become a cornerstone of efficient and protective bulk packaging. Its versatility in bundling, palletizing, and safeguarding goods is undeniable. However, the performance of this material is heavily reliant on its specific properties. Therefore, understanding and testing these characteristics is crucial for optimizing packaging processes and ensuring product integrity.

Several key properties dictate a shrink film's suitability for a given application. Shrinkage rate, the degree to which the film contracts with heat, directly impacts the tightness and conformity of the package. Closely related is shrink force, the pressure exerted during shrinkage. Balancing these two is essential, as excessive force can damage delicate items, while insufficient force results in loose, unstable packaging. Furthermore, the film's strength and durability, encompassing tear, puncture, and abrasion resistance, are fundamental for protecting goods during transit and storage. Seal strength, the integrity of the film's heat-sealed closures, plays a critical role in maintaining package integrity and preventing tampering.

Labthink C631H Thermal Shrinkage Tester is designed and developed in accordance with ISO 14616 and GB/T 34848, for determination of shrinking force, contracting force and shrinkage ratio of heat shrinkable films. Shrinking force greater than 0.01N can be detected. Its advanced laser measurement technology measures thermal shrinkage ratio of film precisely. High precision load cell provides testing accuracy higher than 0.5%FS and better repeatability of test results.

Testing these properties is not merely a formality; it's a vital step in quality control and risk mitigation.  Shrinkage rate is determined by measuring film dimensions before and after controlled heat exposure. Shrink force necessitates specialized equipment to quantify the pressure exerted during the shrinking process. Tensile and puncture tests evaluate the film's strength, while seal strength is measured by assessing the force required to separate a sealed joint.

Testing the properties of the thermal shrinkable films ensures consistency, identifies potential defects, and ultimately safeguards products from damage. By investing in appropriate testing, businesses can avoid costly returns, maintain brand reputation, and ensure customer satisfaction. In regulated industries like food and pharmaceuticals. Ultimately, a proactive approach to testing thermal shrinkable films translates to optimized packaging processes, minimized losses, and enhanced product protection.