Cosmetic packaging testing items mainly include: barrier performance testing (gas transmission rate test and water vapor transmission rate test), friction coefficient (material surface smoothness), tensile strength and elongation, peel strength, heat seal strength (heat seal strength) ), sealing and leakage testing, impact resistance testing, thickness testing, solvent residue testing, printing quality testing, etc.
Barrier property refers to the barrier effect of packaging materials on gas (such as oxygen), liquid (vapor) and other permeates. Barrier performance is an important factor affecting the quality of products during shelf life.
Strength testing includes packaging material tensile strength, composite film peel strength, heat seal strength, tear strength, puncture resistance and other indicators. Tensile strength refers to the large stress value that the material bears before it is broken. Testing can effectively solve the packaging damage and fracture caused by external force due to the insufficient mechanical strength of the selected packaging material. Peel strength, also called composite strength, is to detect the bonding strength between layers in the composite film.
If the bonding strength is too low, problems such as leakage caused by separation of the layers will easily occur during packaging use. Heat seal strength is to detect the strength of the seal. During the storage and transportation of the product, if the heat seal strength is too low, it will cause problems such as cracks in the heat seal and leakage of the contents. Puncture resistance is an index for evaluating the puncture resistance of packaging against hard objects.
The sealing performance test can ensure that the sealing of the entire product package is intact, and prevent the leakage of the product from causing deterioration of the packaged product due to the poor sealing performance.
The headspace gas analyzer is used to determine the oxygen and carbon dioxide gas content and mixing ratio in sealed packaging bags, bottles, cans, etc.; it is suitable for quickly and accurately determining the gas group in the packaging in production lines, warehouses, and laboratories. Make evaluations based on content and ratio to guide production and ensure that the shelf life of the product is achieved.
Test the impact resistance of packaging materials to ensure that the selected packaging materials can effectively protect the product. The impact resistance test has two test methods: falling dart impact and pendulum impact.
The inner and outer surfaces of the food film should have suitable slip properties to ensure that it has a good opening and can be smoothly transported and packaged on a high-speed production line.
Thickness is the basic index for testing thin films. Uneven thickness will not only affect the tensile strength and barrier properties of the film, but also affect the subsequent processing of the film.
Bonding fastness of printing ink layer: YGJ-02 Adhesive Tape Rolling Machine and BLJ-02 Disc Peeling Tester, the two machines are used together, suitable for plastic film and cellophane decorative prints produced by gravure printing process (including composite film prints) Carry out the test test of the bonding fastness of the printing ink layer. It is also used to test the adhesion state of the surface layer formed by vacuum coating, surface coating, composite and other related processes.
The residual amount of solvent in the packaging bag is directly related to the safety of users. In order to ensure safety, a gas chromatograph is required to detect the residual amount of solvent.