Cosmetic packaging materials need to do what physical testing items

Common cosmetic packaging materials are plastic bottles, glass bottles,plastic tubes, etc., different materials of packaging materials have different characteristics, suitable for different textures and ingredients of cosmetics.  Some cosmetics need to use special packaging to ensure the activity of the ingredients because of the particularity of the ingredients. Dark glass bottles, vacuum pumps, metal tubes, ampoules are commonly used for special cosmetic packaging.

The barrier property of cosmetic packaging is one of the important testing items of cosmetic packaging. Barrier refers to the barrier effect of packaging materials on gas, liquid and other penetrants, and the barrier performance is an important factor affecting the quality of products in the shelf life.

The unsaturated bonds in cosmetic ingredients are easy to cause rancidity due to oxidation, and the loss of water is easy to dry and harden cosmetics. At the same time, the maintenance of aromatic odor in cosmetics also plays a vital role in the sales of cosmetics. The barrier performance test includes the test of the permeability of cosmetic packaging to oxygen, water vapor and aromatic gases.

Thickness is the basic ability index of film detection. Uneven thickness distribution will not only directly affect the tensile strength and barrier property of the film, but also affect the subsequent development and processing of the film.Whether the thickness of the cosmetic packaging material (film or sheet) is uniform is the basis for testing the properties of the film. The uneven thickness of the film will not only affect the tensile strength and barrier property of the film, but also affect the subsequent processing of the film.

There are a variety of thickness measurement methods, generally divided into non-contact and contact: non-contact including ray, eddy current, ultrasonic outside; Also known as mechanical thickness measurement in the contact industry, it is divided into point contact and surface contact.At present, the laboratory test of cosmetic film thickness adopts the mechanical surface contact test method, which is also used as the arbitration method of thickness.