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Cosmetic tube packaging raw materials & compatibility test

Views: 79     Author: Site Editor     Publish Time: 2022-03-01      Origin: Site Inquire

As one of the pillar industries of fast-moving consumer goods, consumers have higher requirements for the safety of cosmetic packaging materials, so the testing of cosmetic packaging materials is particularly important. In a word: testing is not a panacea, but not testing is Absolutely impossible.


For the entire cosmetics development process, in order to improve efficiency, it is absolutely impossible to save the longest time-consuming compatibility test of packaging materials. Even the best packaging materials cannot be guaranteed to be compatible with the material.

airless bottle

1. Packaging material compatibility test


The compatibility of the packaging material broadly refers to the interaction between the packaging material and the content, including chemical compatibility, physical compatibility, and biological compatibility.


1. Chemically incompatible


Chemical immiscibility simply means that the chemical components in the packaging material have a chemical reaction with certain components in the content, which is manifested in the appearance of the packaging material or the content, and changes in odor.


2. Physically incompatible


Physical immiscibility refers to the physical changes that occur between the packaging and contents of the lumps due to mutual influence, such as cracking, dissolution, adsorption, penetration, and so on.


3. Biological incompatibility


Biological immiscibility refers to the migration of certain substances in the plastic packaging of cosmetics to the chemical products. For this judgment, it is directly based on the dissolution of harmful substances. And this is strictly regulated in the sanitary regulations of chemical products.


2. Test method for compatibility of cosmetic packaging products


In general, put the corresponding content into the hose and place it in a constant temperature and humidity box at 40℃ and 75%RH for 4 weeks. The product shall not be discolored (including printed content), ink/hot stamping layer/plating layer/spraying layer shall fall off , Melting and other abnormalities. In other special circumstances, special tests are arranged.


In summary, many incompatibility phenomena are usually not manifested in a single form. Why are they incompatible and which raw materials are incompatible with which materials are particularly important. Let's take a look at the commonly used plastic packaging materials in hose packaging.

 

airless bottle


3. Commonly used plastic packaging materials


Commonly used plastic packaging materials are: PE, PP, ABS, PET and PVC, etc. The following will specifically explain the three widely used materials in cosmetic hose packaging: PE, PP and ABS.


1. PE


PE is insoluble in any organic solvents, but hydrocarbons and oils may cause PE swelling. The embrittlement temperature of PE is generally below -30 degrees. It has good cold resistance, small changes in mechanical properties at low temperatures, and excellent heat sealability. , Thermal adhesion, radiation resistance. PE is a non-polar polymer with poor printability, and its permeability to polar compounds is lower than that of non-polar compounds.


Generally used for hoses and aluminum-plastic tubes in cosmetic packaging.


2. PP


PP has excellent mechanical properties. PP is a non-polar material with poor printing performance. Its tensile strength, hardness, wear resistance, heat resistance, and gas barrier properties are all higher than PE. PP has good bending fatigue resistance, and is often used to make various bottle caps or conjoined plastic boxes. PP has good chemical stability, can withstand acids, alkalis, salts and many organic solvents below 80 degrees, and does not cause stress cracking in many solvents, detergents and detergents. PP has poor aging resistance, poor cold resistance, and easy brittleness at low temperature. In the packaging of chemical products, PP is mainly used to make various tube caps. High safety, environmental protection and recyclable.


3. ABS


ABS resin has almost no effect on water, inorganic salts, alkalis and acids. It will dissolve or form an emulsion in ketones, aldehydes, esters, and chlorinated hydrocarbons; it is insoluble in most alcohols and hydrocarbon solvents, but it is incompatible with hydrocarbons. It will soften and swell after long-term contact. The corrosion of ABS resin surface by glacial alkyd, vegetable oil and other chemicals can also cause stress cracking, but it has little effect on non-stressed products. Commonly used in cosmetic packaging outer cover, wear-resistant, good electroplating adhesion, often used in electroplating outer cover.


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