5 basic requirements for cosmetic packaging

Cosmetic packaging is more complicated, including first-layer packaging, two-layer or three-layer packaging, and outer transport packaging. There are many types of first-layer packaging, including bottles (such as plastic bottles, glass bottles), hoses (such as plastic hoses, composite hoses, metal hoses), bags (such as paper bags, plastic bags, composite bags), etc. ; Two-layer or three-layer packaging includes boxes (such as cartons, plastic boxes, metal boxes), labels, blister, etc.; outer transport packaging includes cushioning packaging, etc.

Cosmetic bottle


The appearance requirements of different levels of packaging have commonalities and inherent particularities. Common features of appearance requirements include packaging and printing patterns and handwriting should be neat, clear, not easy to fall off, and the color should be uniform. The specificity of appearance requirements varies according to different types of packaging.


For bottle packaging, the bottle body should be stable, smooth, uniform in thickness, without obvious scars and deformation, and there should be no cold bursts and cracks; the bottle mouth should be straight and smooth, and there should be no burrs (burrs), threads, and bayonet The matching structure should be intact and correct; the matching of the bottle and the cap should be tight, without slippage, loosening and leakage; the inside and outside of the bottle should be kept clean.


For bag packaging, it is required that there should be no obvious wrinkles, scratches, air bubbles, and the color should be uniform; the sealing should be firm, and there should be no openings, perforations, or leakage (paste); the composite bag should be composited firmly, and the coating layer Even, no shedding.


Material requirements


In order to achieve sustainable development of packaging, bio-based degradable materials came into being and gradually became a hot topic in the industry. Bio-based degradable materials refer to a new class of materials made by biological, chemical and physical methods using renewable materials, such as crops, trees, other plants and their residues and contents as raw materials.


Products made from bio-based degradable materials usually have the characteristics of green, environmentally friendly, renewable raw materials, and first-level biodegradability.


Currently, large companies such as DuPont in the United States and BASF in Germany are actively expanding their bio-based chemicals business. As a packaging developer in a cosmetics manufacturer, the author hopes that bio-based biodegradable materials can be used in cosmetic packaging in the future to promote the sustainable development of cosmetic packaging.


Structural design requirements


For cosmetics, the first layer of packaging is very important and directly related to product quality. Most of the first-layer packaging of cosmetics are plastic containers, and the structural design of plastic containers is inseparable from the choice of materials and molding processes. Commonly used plastic materials can be divided into soft materials and hard materials in terms of texture, namely, typical soft materials represented by PE and PP, and typical hard materials represented by ABS and PMMA.


Common molding processes for plastic containers include injection molding, hollow molding, injection-blow stretch molding, etc. However, no matter which molding process is selected, the sealing design and capacity design of the plastic container are very important.


1. Sealing design


Product sealing is a mandatory quality standard in the cosmetics industry. Generally, gasket sealing and quality (gross weight), volume, production date and shelf life or production batch number and expiration date are selected, and the selection of GB/T191-2008 'Packaging, Storage and Transportation' The pictorial signs in 'Picture Signs' shall be clear, complete, and in an appropriate location.


2. Capacity design


There are two conventional forms of capacity indication: one is the product whose contents do not flow under normal temperature conditions in terms of weight (g, kg), and the other is the product whose contents can flow under normal temperature conditions in terms of volume (ml , L) is the unit.


For products with flowable contents, when using weight (g) as the unit, it is necessary to convert the required content weight into volume units, volume (ml) = weight (g) / product density. This is because after the packaging container is formed, its inner cavity space is most convenient and accurate to be tested with standard distilled water.


When designing the capacity of the packaging container, considering that the cosmetics will change in volume and form due to factors such as time and temperature, preparation and filling, and its own viscosity, there should be appropriate space in the design of the full capacity of the packaging container.


Regulatory standard requirements


A full understanding of the regulations and standards related to cosmetic packaging is the prerequisite and basis for a good cosmetic packaging design. For example, in the No. 75 'Measures for the Supervision and Administration of Quantitative Package Commodities' issued by the General Administration of Quality Supervision, Inspection and Quarantine, there are clear regulations on the net content of products: quantitatively packaged products that have a large change in net content due to changes in moisture and other factors, The producer shall take measures to ensure the accuracy of the net content of the commodity under the prescribed conditions.


Therefore, considering that powder products will become smaller in size over time, and water products will lose weight over time, we have to compensate for these changes. This point should be paid special attention to when designing transparent packaging capacity.


At the same time, cosmetics manufacturers should also be aware of product-related national, local and corporate regulations and standards, such as the 'Cosmetic Labeling Management Regulations' and 'Cosmetic Hygiene Supervision Regulations', etc., to ensure that cosmetic packaging complies with relevant regulations and standards. . Filling production demand


On-line filling is actually to check whether the packaging design is perfect and whether the container production quality is qualified. Because in the preparation and filling process, the content or material body will generate bubbles and foam due to the impact between the stirring and the material, which will cause volume changes.


For example, gel products have high viscosity, which will bring in a lot of air during the manufacturing and mixing process, which will cause a large number of bubbles to be stored in the semi-finished product, which will affect the product volume; shampoo products have inherent foaming agent components, which will be affected during the filling process. Due to high-speed impact, a large amount of foam floating on the surface of the material body is generated, thereby expanding the demand space of the container; cream products have high viscosity, and the surface of the cream body will produce conical protrusions after filling. Leveling, if the product combination is completed at this time, the cream body will contact the sealing sheet, which will not only affect the appearance of the combined product, but also cause the possibility of secondary contamination of the product. Therefore, these phenomena should be fully considered when designing the capacity of such products.


In addition, in the large-scale production process, the packaging assembly components are required to be able to run on a high-speed assembly line; the labels, printed patterns and batch numbers on the surface of the container are required to tolerate the friction caused by the high-speed conveying process; the container structure requires the high-speed conveying process Keep the state stable and no dumping phenomenon, otherwise it will directly affect the normal progress of the packaging process, the labor intensity of the operators and the economic benefits of the cosmetic packaging enterprise.


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