As an important component of cosmetic packaging, plastic bottles for cosmetics have a direct impact on the quality and shelf life of cosmetics due to their oxygen barrier properties. Therefore, it is necessary to test the oxygen resistance performance of cosmetic plastic bottles. This article will introduce common methods for testing the oxygen resistance performance of plastic bottles in cosmetics, helping readers understand how to evaluate the oxygen resistance performance of plastic bottles.

1、 Testing Principles

The oxygen resistance performance test is mainly based on the measurement of oxygen transmittance. Oxygen transmittance refers to the amount of oxygen that a plastic bottle can pass through per unit area of time. By measuring this indicator, the oxygen blocking ability of plastic bottles can be evaluated to determine whether they are suitable as packaging materials for cosmetics.

2、 Testing methods

Instrument preparation: Choose a professional oxygen transmittance tester to ensure that the instrument is calibrated and in normal working condition.

Sample preparation: Select the plastic cosmetic bottle to be tested, tighten the bottle cap and ensure good sealing. According to the instrument requirements, take a certain area of the bottle wall as a sample.

Test environment: Conduct the test in a constant temperature and humidity environment to eliminate the influence of environmental factors on the test results.

Testing operation: Place the sample in the testing chamber of the oxygen permeability tester and set the testing parameters (such as testing temperature, humidity, time, etc.) according to the instrument manual. After starting the test, the instrument will automatically measure and record oxygen transmittance data.

Data analysis: After the test is completed, calculate the oxygen transmittance based on the data output by the instrument. By comparing the oxygen transmittance of different plastic bottles, the superiority or inferiority of their oxygen resistance performance can be evaluated.

3、 Precautions

During the testing process, it is important to ensure the integrity of the sample and avoid any damage or deformation that may affect the test results.

The test results may be affected by factors such as sample thickness and surface treatment, so it is necessary to test different samples under the same conditions to ensure the accuracy of the results.

When conducting oxygen resistance performance tests, other factors such as the sealing and weather resistance of plastic bottles need to be considered to comprehensively evaluate their suitability as cosmetic packaging materials.

The oxygen resistance performance test of cosmetic plastic bottles is an important means to ensure the quality and shelf life of cosmetics. By using professional oxygen permeability testers and scientific testing methods, the oxygen resistance performance of plastic bottles can be accurately evaluated. In practical applications, it is recommended to choose suitable plastic bottle materials based on factors such as the type of cosmetics and storage conditions, and to ensure that they meet packaging requirements through oxygen resistance testing. At the same time, with the continuous progress of technology and the continuous development of the cosmetics market, the oxygen resistance performance of plastic bottles for cosmetics will also be further improved and optimized.