Barrier properties of cosmetic packaging

Release time :

2023-02-14

What is the barrier property? Generally speaking, packaging needs to combine protective, functional and decorative requirements. Among them, the protective function of packaging is the most basic and important function, and having good barrier properties is one of the requirements for the protective function of packaging.

Packaging materials for cosmetics, except for glass, ceramics and metal materials that have good barrier properties, whether blow-molded bottles or injection-molded cans, hoses or films.They are all made of polymer materials such as polyethylene (PE), polypropylene (PP), polyethylene terephthalate (PET), polyethylene-vinyl alcohol copolymer (EVOH) or physical or chemical modifications of these materials. which is what we often refer to as plastic.The microscopic structure of plastics shows that plastic materials are not "airtight". As shown in the figure below, observing the surface of PE and PP materials under a high-power electron microscope, we can see that there are holes in the materials, which is enough for us to realize that the plastic materials themselves have a certain degree of permeability.

So is it necessary for us to consider the barrier properties of cosmetic packaging? The answer is definitely.In fact, in the development of food packaging, the barrier and airtightness of the packaging are equally valued, and it plays a role in food quality preservation, freshness preservation, flavor preservation and shelf life extension.However, in the development of cosmetic packaging, the barrier properties of the packaging are often neglected while the airtightness is emphasized.This is why in the actual development of cosmetics, you will encounter cream or lotion products with good overall packaging and airtightness. After a period of time, it was found that the texture of the cream became thicker and thicker, and it could not even be used at all; there were also some formulas containing volatile organic active substances, which slowly penetrated through the packaging materials, resulting in the lack of corresponding active ingredients.Therefore, in the development of cosmetic packaging, it is necessary to consider the barrier function of the packaging in order to ensure a good skin feel, preservation effect and prolong the shelf life of the product.Only by correctly understanding the definition and penetration mechanism of material barrier properties, and understanding the factors affecting the barrier properties of polymer materials, can we choose packaging materials with suitable barrier properties according to actual needs in the development of cosmetic packaging, so as to be able to do a job with ease.

The barrier properties of cosmetic packaging have been introduced, and the definition of material barrier will be explained in the next issue.Welcome more people to pay attention to our company, Zhuhai Baoli Foam Spray Pump Co., Ltd.

We are professionals.Looking forward to cooperating with you.

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