When we mention Chanel, Dior, Estee Lauder, Shiseido and other brands, what do we think of? Is it beauty, luxury, fashion, or perfume, lipstick, or mascara? I believe that different people will have different answers, because these are topics related to women's cosmetics. Makeup is a woman's face project, not only the internal quality of the cosmetic itself, but also the quality of the appearance of the packaging container, such as the texture, style, and color.

 

The packaging container of the world-renowned first-line cosmetics is also unique. In addition to the unique appearance, pleasing tones, and comfortable touch are also important reasons why women love these brands! The wonderful touch comes from a good surface treatment process. Today we will unveil its mysterious veil, yes, it is plasma surface treatment!

 

1 Plasma surface treatment

 

Plasma sterilization, plasma beauty, plasma sterilization, etc., the application of plasma surface treatment technology is actually by our side. The principle of plasma surface treatment is to use a closed or developed discharge device to ionize the required gas to form an aggregate of active particles with physical and chemical characteristics. These energetic particles react with the surface of the material to form volatile substances or activities. Group.

 

2 Surface treatment of cosmetic containers

 

2-1 The materials of common cosmetic packaging containers include: plastic, glass and metal, of which plastic is the most widely used. As people's awareness of environmental protection and health increases, ring materials such as PP, PE, and PET that can directly contact with cosmetics are increasingly used.

 

2-2 Similar to PP, its molecular structure determines that the surface energy is relatively low, and sometimes some pearl powder and the like are added. When doing thermal transfer, inkjet, printing and other processes, the ink , The fastness of silk screen will be affected. The traditional surface treatment methods are all overfire (flame) methods.

 

①The advantages of flame treatment: the size of the flame spray can be adjusted according to the treatment area; the energy is large and the treatment efficiency is relatively high; the gas source can directly use natural gas or coal gas.

 

② Disadvantages of flame treatment: temperature is not well controlled; it is easy to cause material color difference and deformation; gas use cost is relatively high; there are safety hazards such as poisoning or fire.

 

 

2-3 Plasma surface treatment is an advanced technology imported from abroad, and has gradually been accepted and recognized by the domestic market in the past ten years. Atmospheric jet plasma surface treatment equipment can ionize clean compressed air to form plasma and react with materials.

 

 

①Advantages of plasma surface treatment: The temperature of plasma is relatively low, it will not cause color difference and deformation of the product, the use and maintenance cost is very low; it is safe and reliable, and friendly to the environment and people.

 

② Disadvantages of plasma surface treatment: the initial equipment investment cost is relatively high; the single-machine atmospheric jet plasma treatment area is generally 40-80mm.

 

 

3 Test of plasma surface treatment

 

3-1 The contact angle of water droplets before plasma surface treatment of PP is 84 degrees

 

3-2 The contact angle of water droplets after plasma surface treatment of PP is 50 degrees

 

The test effect of plasma surface treatment is very obvious. In industrial applications, the packaging container after plasma surface treatment can fully meet the 100 grid test, tensile test, etc., and meet the requirements of cosmetic container inspection:

 

① There is no obvious color difference in the single color of the same batch of cosmetic containers, and the color printing is not rough.

 

②The surface of the cosmetic container is smooth, flat and clean, without wrinkles, roughness, unevenness, and no obvious scratches or abrasions.

 

③The screen printing, spraying, ink and wiping method of cosmetic containers showed no bleaching or falling off.

 

In summary, the application of plasma surface treatment to cosmetic containers can not only improve the adhesion of inks and silk screens, but also improve the quality of surface treatment to meet women's dual requirements for the quality and health of cosmetic containers. The efficiency of surface treatment and the cost of equipment investment will be easily solved with the advancement of technology and the increase in demand. The popularization of plasma surface treatment technology will be the general trend!