Determination apparatus and method for comprehensive properties of heat-shrinkage film

Abstract

The invention discloses a determination apparatus and method for the comprehensive properties of a heat-shrinkage film, belonging to the field of testing technology. The determination apparatus comprises a base, sample clamps, a constant temperature control device, a sample length adjusting device and a control system. The determination method comprises the following steps: sample preparation; sample fixation; testing; etc. The determination apparatus and method provided by the invention are directed at the material characteristics of the heat-shrinkage film and particularity of a heat shrinkage force testing environment of the heat-shrinkage film, utilize constant-temperature water bath for heating to allow the heat-shrinkage film to be uniformly heated, and are stable and reliable in results; A lifting device is used for adjusting the working condition of a sample and the sample length adjusting device is used for adjusting distance between the sample clamps, so the determination apparatus and method can test the peeling strength of samples of different lengths and the heat shrinkage force of the samples of different lengths under different temperature conditions; meanwhile, cold shrinkage force can be tested during testing of the heat shrinkage force, so a testing scope is greatly broadened; moreover, the clamps can be replaced for testing of expansibility or restoring force, so testing of more properties of the heat-shrinkage film is realized.

Description

technical field [0001] The invention belongs to the technical field of testing, and relates to a heat-shrinkable film comprehensive performance testing device and method, especially suitable for testing the breaking strength of food packaging films, and testing the thermal shrinkage force performance in water or oil liquid media, and testing the film Packaging product peel strength test. Background technique [0002] Polymer films, including synthetic polymer films and natural polymer films, are widely used in the packaging industry, including the food packaging industry. Most of the sub-polymer films have a certain degree of heat shrinkage, and their heat shrinkage will affect the packaging performance of the film. The heat shrinkability of polymer film includes heat shrinkage rate and heat shrinkage force. Appropriate heat shrinkage rate and heat shrinkage force can make the packaged products look full, tight and fit. Stable heat shrinkage rate and heat shrinkage force ...

AI Technical Summary

Problems solved by technology

At present, there is a lack of devices on the market that can quantitatively detect heat shrinkage in water and oil media, and more importantly, there is a lack of detection devices that can quantitatively detect heat shrinkage, breaking strength, and peel strength.

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