What is the barrier performance of PET aluminum plated film?

summary

PET aluminum plated filmDue to its excellent barrier properties, it is widely used in fields such as food packaging and pharmaceutical packaging. By coating its surface with a layer of aluminum, not only can the mechanical strength of the material be improved, but its ability to block oxygen, moisture, light, etc. can also be significantly enhanced. This article will explore the barrier properties of PET aluminum coated film and demonstrate its performance under different conditions through experimental data.

Experimental Materials and Methods

The PET aluminum coated film used in this study is composed ofAdvanced Institute (Shenzhen) Technology Co., LtdProvide. The experimental materials include PET aluminum coated film samples of different specifications, all of which have undergone strict surface treatment before the experiment to ensure the accuracy of the test results.

Experimental Design and Implementation

In order to study the barrier properties of PET aluminum plated film, we prepared several sets of samples with different thicknesses and tested them under the same conditions. The specific experimental steps are as follows:

1. Sample preparation: Select samples of different thicknessesPET aluminum plated filmThe samples are 50 μ m, 75 μ m, and 100 μ m, respectively.
2. Oxygen Transmission Rate Test: Use an Oxygen Transmission Rate Tester to conduct the test at a temperature of 23 ± 2 ° C and a relative humidity of 50 ± 5%.
3. Water Vapor Transmission Rate Test: Use a Water Vapor Transmission Rate Tester to conduct the test at a temperature of 23 ± 2 ° C and a relative humidity of 90 ± 5%.
4. Light transmittance test: Use a UV Transmission Rate Tester to measure the transmittance of different bands under a standard light source.

Experimental results and analysis

Oxygen permeability test results

By conducting oxygen permeability tests on three sets of PET aluminum coated film samples with different thicknesses, we obtained the following data:

• 50 μ m PET aluminum plated film: oxygen permeability of 0.05 g/m ² · day;
• 75 μ m PET aluminum plated film: oxygen permeability of 0.03 g/m ² · day;
• 100 μ m PET aluminum plated film: oxygen permeability of 0.02 g/m ² · day.

From the data, it can be seen that asPET aluminum plated filmAs the thickness increases, the oxygen permeability gradually decreases, indicating that the aluminum plating layer plays a good role in oxygen barrier.

Test results of water vapor transmission rate

Next, we conducted water vapor permeability tests on three groups of samples, and the results are as follows:

• 50 μ m PET aluminum plated film: water vapor transmission rate of 0.1 g/m ² · day;
• 75 μ m PET aluminum plated film: water vapor transmission rate of 0.08 g/m ² · day;
• 100 μ m PET aluminum plated film: water vapor transmission rate of 0.05 g/m ² · day.

Similarly, with the increase of thickness, the water vapor transmission rate shows a decreasing trend, indicating that the barrier effect of aluminum coating on moisture increases with the increase of thickness.

Light transmittance test results

Finally, we conducted light transmittance tests on three groups of samples, and the results are as follows:

• 50 μ m PET aluminum plated film: UV transmittance of 5%;
• 75 μ m PET aluminum plated film: UV transmittance of 3%;
• 100 μ m PET aluminum plated film: UV transmittance of 1%.

From the test results, it can be seen that as the thickness of PET aluminum plated film increases, the UV transmittance significantly decreases, which means that the aluminum plated film has a very good blocking effect on ultraviolet rays.

Comparative analysis of data

By comparing different thicknessesPET aluminum plated filmBy comparing and analyzing the barrier performance test data of the samples, we can draw the following conclusions:

1. Oxygen barrier performance: As the thickness of PET aluminum plated film increases, the oxygen permeability gradually decreases, indicating that the aluminum plated layer has a good barrier effect on oxygen.
2. Water vapor barrier performance: The water vapor transmission rate decreases with the increase of PET aluminum plating film thickness, indicating that the aluminum plating film has a significant barrier effect on moisture.
3. UV blocking performance: The UV transmittance decreases with the increase of PET aluminum coating thickness, indicating that the aluminum coating has a good protective effect on UV rays.

conclusion

From the above experimental data, it can be seen that PET aluminum plated film has excellent barrier properties, which can effectively block the penetration of oxygen, moisture, and ultraviolet rays. As the thickness of PET aluminum plated film increases, its barrier performance also enhances. Therefore, when choosing PET aluminum plated film for packaging, the appropriate thickness should be selected according to actual needs to ensure the preservation effect of the product and extend the shelf life.

The above data is for reference only, and specific performance may vary due to production processes and product specifications.