Several major needs of end users for cosmetic packaging

The cosmetic packaging tube is more complicated, including the first layer packaging, the second or third layer packaging, and the outer transport packaging. There are many types of first layer packaging, including tube type (such as plastic tube, metal tube), tube type (such as plastic tube, composite tube, metal tube), bag type (such as paper bag, plastic bag, composite bag), etc.; second layer or Three-layer packaging categories include boxes (such as cartons, plastic boxes, metal boxes), labels, blister packaging, etc.; outer transport packaging includes cushioning packaging, etc. 

The appearance requirements of different levels of packaging have similarities 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 particularity of appearance requirements varies according to different types of packaging. 

For tube packaging, it is required that the tube body should be stable, smooth, uniform in thickness, without obvious scars and deformation, and should not have cold bursts and cracks; the tube mouth should be straight and smooth, and there should be no burrs (burrs), threads, and bayonets. The matching structure should be intact and correct; the tube and the cover should be matched tightly without slippage, loosening and leakage; the inside and outside of the tube 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, without openings, perforations, or leakage (paste); the composite bag should be composited firmly, and the coating layer should be firm. Even and 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 are generally green, environmentally friendly, renewable raw materials, and first-level biodegradable. 

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 tubes. 

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, PMMA, etc. 

The 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 compulsory 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 GB/T191-2008 "Packaging, Storage and Transportation" is selected. 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 labeling: one is that the product whose contents do not flow at room temperature is expressed in weight (g, kg), and the other is that the product whose contents can flow under normal temperature is expressed in 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 a volume unit, 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 volume of the packaging container, considering that the cosmetics will change in volume and form due to factors such as time and temperature, formulation and filling, and its own viscosity, there should be appropriate space in the design of the full volume of the packaging container. 

3. Requirements for regulations and standards

A full understanding of the regulations and standards related to cosmetic packaging is the prerequisite and basis for a good cosmetic packaging tube design. For example, in the No. 75 "Measures for Supervision and Administration of Quantitative Package Commodities" issued by the General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, there are clear provisions on the net content of products: For quantitatively packaged products with large changes in net content caused by moisture changes and other factors, The producer shall take measures to ensure the accuracy of the net content of the commodity under the specified 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 "Cosmetics 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, resulting in 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 ingredients, which will 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 of the content after filling will produce cone-shaped protrusions, which cannot be used in a short time. 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.