What testing should be done for cosmetic packaging materials

Cosmetic packaging testing items mainly include: barrier performance testing (gas permeability test and water vapor permeability test), coefficient of friction (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.

　　 1. Barrier performance testing of cosmetic packaging testing equipment
　　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 the shelf life.
　　 2. Cosmetic packaging strength testing
　　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 maximum stress that the material can withstand before it breaks. Testing can effectively solve the packaging damage and breakage caused by external force due to insufficient mechanical strength of the selected packaging material. Peel strength is also called composite strength, which 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.
　　 Three, cosmetic packaging sealing performance test
　　Through the sealing performance test, it 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.
　　 4. Analysis of headspace gas in cosmetic packaging
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.; suitable for quickly and accurately determining the gas group in the packaging in production lines, warehouses, laboratories, etc. Make evaluations based on content and ratio to guide production and ensure that the shelf life of the product can be achieved.
　　 5. Impact resistance test of cosmetic packaging
　　 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.
　　 6. Cosmetic packaging tearing performance test:
　　 Seven. Coefficient of friction of cosmetic packaging (surface slippery)
　　The inner and outer surfaces of the food film should have suitable slipperiness to ensure that it has a good opening and can be smoothly transported and packaged on a high-speed production line.
　　 8. Cosmetic packaging thickness measurement
　　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.
　　 Nine, printed matter testing equipment
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 decoration 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, compounding and other related processes.
　　 Ten, packaging solvent residue detection
　　 The residual solvent content of the packaging bag is directly related to the safety of the user. In order to ensure safety, a gas chromatograph should be used to detect the residual solvent content.