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The development status and application scope of composite packaging materials

    Composite packaging materials are made by heat-sealing films with different characteristics with special adhesives to overcome the inherent defects of a single film, and finally can be used in various packaging bags.

A. Development status and scope of application of  composite packaging materials


    According to statistics, 30% of product competitiveness comes from packaging!

    Packaging is the “silent salesman” of goods. In addition to protecting goods, it must also be devoted to beautifying, promoting, and inducing consumers’ desire to buy, so as to enhance the sales competitiveness of goods in the market. All in all, the importance of product packaging is that packaging directly affects the consumer’s psychological orientation and purchasing behavior of customers, so how to make product packaging design cater to consumers’ buying psychology is an important factor in promoting product sales.

     As the name implies, composite packaging materials refer to packaging materials in which thin, soft, multi-layer materials are combined through a composite process, so they are also called flexible packaging materials, mainly composed of various plastic products.

    With the development of packaging technology in my country, composite packaging materials have also shown new development trends. Generally speaking, composite packaging materials have the characteristics of protection, functionality and decoration. Its specific performance is:

①The packaging should play a protective role during the transportation, storage and use of the product;

②The packaging must reflect the characteristics and uses of the products it contains;

Packaging should provide consumers with convenient functions;

Packaging should differentiate the product from other competitors and be easy to attract consumers’ attention.


A1. The development status of composite packaging materials


    At present, in the Chinese market, plastic containers are still the main packaging form of daily chemical products, but with the increasing number of product types and increasingly fierce market competition, domestic daily chemical companies are also increasingly demanding product packaging materials and packaging design. high. In product packaging, novel designs, diversified material applications and continuous innovation have become the key to increasing product competitiveness.

    At present, plastic containers used for packaging of daily chemical products are mainly made of PET, PE, PVC and PP. Among them, the application of PET plastic containers in the field of daily chemical products has grown particularly fast. For example, Naaisi, Blue Moon, Kaimi, and Watsons and other companies and brands have taken the lead in using PET materials in shower gels, skin care products, and detergents. Packaging container. PE is the main packaging material for household washing products. High-density polyethylene (HDPE) is widely used in laundry detergents, various detergents, sanitary cleaners and clothing softeners. At present, high-density polyethylene blow-molded packaging is widely used in shampoo and hair care products and shower gels on the market. The main reasons why HDPE is widely adopted are its mature technology, good light-proofing, flexible labeling situation and strong randomness in color selection. PVC is mainly used for packaging of cosmetics, but it is gradually eliminated and replaced by PET with better functionality and appearance. Because of its good chemical stability and tightness, PP is currently more used in the packaging of pharmaceutical-level personal and home care products.

     With the continuous maturity and innovation of flexible packaging technology, flexible packaging also quietly appeared on the packaging stage of daily chemical products. Especially in recent years, the price of daily chemical raw materials has risen as the international oil price has risen. For the sake of reducing costs, many domestic daily chemical companies have also begun to consider the issue of flexible packaging of products. Initially, flexible packaging was only used as the main method of refilling packaging or disposable packaging for plastic containers and other packaging. However, in order to establish and realize their own differentiated sales and for the environmental protection of packaging, flexible packaging was used in daily chemical product packaging. The application of the above is more and more extensive.
    From an international point of view, considering the protective, functional and decorative characteristics of daily chemical product packaging, the trend of international daily chemical product packaging is to continuously introduce new concepts, attractive shapes and colors of outer packaging. Professional packaging design should be aimed at different consumer groups and different product categories. At the initial stage of packaging design, the shape, color, material and label of the packaging should be fully considered, and all factors should be connected, paying attention to every detail of product packaging. , Which always reflects the humanized, fashionable and novel packaging concepts, thus having an impact on the final product. At the same time, many existing products are constantly changing the packaging form, refurbishing the old packaging. Although the old wine is packed in new bottles, the product packaging is more in line with the consumer needs of consumers, and it is convenient for consumers to identify the product. It can also better reflect the functions and special features of the product, thus injecting the vitality of new products into old products.
    From the perspective of the development trend of domestic daily chemical product packaging, with the development of packaging technology and the gradual promotion and application of digital technology, now the focus of the development of product packaging by manufacturers is the development of new materials and the emergence of new processing technologies, and the pursuit of packaging The new shape of the object, thereby highlighting the novelty and elegance of the product.
A2. Application scope of composite packaging materials

    Composite packaging materials are widely used, mainly in the following categories:
a. Three-side sealing bag.
    This is the most widely used composite packaging material and the main packaging method for disposable daily chemical products. It is widely used in packaging bags for washing powder, shampoo and cosmetics.
b. Special-shaped packaging bags.
    Breaking through the traditional shape, companies can freely design the shape of product packaging, which is more conducive to the promotion of products. Special-shaped packaging bags can make products unique and are widely used in disposable packaging and promotional packaging of various daily chemical products. The special-shaped double bag packaging is divided into two different contents, which is more convenient for consumers to use. It is widely used in shampoo and conditioner sets.
c. Liquid stand-up bag with spout.
   This spouted liquid stand-up bag combines the dual advantages of plastic containers and flexible packaging. It is not only lightweight and environmentally friendly, but also has the characteristics of easy dumping, filling, repeated sealing, and good-looking shelves. It breaks through the flexible packaging that has always been only possible. For bottle refills and limitations of disposable packaging. This kind of self-supporting bag has two ways to add the mouth: oblique mouth and straight mouth. The oblique nozzle is to weld the nozzle at the oblique corner, which is generally convenient for large-volume packaging of more than 300mL. The straight mouth is the mouth welded on the top, generally used for small-volume packaging. Mouth-like liquid stand-up pouch, the bevel of the bag is made into a mouth-like shape, which is convenient for pouring and filling. It is an improved form of refill and disposable packaging. In addition, there are special-shaped self-supporting bags for easy dumping.
d, zipper bag
    The zipper bag packaging has opened up a new fashion for daily chemical packaging. The zipper bag is a packaging form that has appeared on the market more in the past one or two years, especially in the field of food packaging. This packaging form has good sealing performance and can Features such as repeated openings quickly penetrate the market, and domestic daily chemical manufacturers are also closely watching the emergence of this new packaging form. The daily chemical products in this form of packaging are “Weibai Explosive Salt” launched by Tianjin Henkel Company. When it entered the market, its blue zipper bag was very eye-catching on supermarket shelves, attracting the attention of many consumers. According to the relevant introduction of Tianjin Henkel Company, “Weibai Explosive Salt” is a detergent builder, which can wash away some stubborn stains when used together with washing powder. At present, some 50 grams of “Weibai Explosive Salt” are packaged in zipper bags.
    The reason for choosing the zipper bag packaging form is that,  first of all, the packaging form of this product is relatively new and can be upgraded. At present, there is no other detergent product in the domestic market that uses this type of packaging. Secondly, this kind of packaging is more convenient. Many consumers have similar experiences: When washing clothes accidentally touch the washing powder, it will be scattered on the ground. Although the upright bag and flat-bottom bag can reduce the occurrence of this situation, they still It is impossible to completely solve similar problems. Therefore, many consumers have to use clips to clamp the packaging bags. The zipper bag completely solves this problem. Consumers can repeatedly open and seal. Finally, it is also a more important point. Since “Weibai Explosive Salt” is a builder, if it is exposed to the air for a long time, it will easily react with the moisture in the air and affect the washing effect. The zipper bag can avoid the contents and air after opening. Excessive contact can achieve a good moisture-proof effect and ensure product quality.
B. The structure, performance and common raw materials of composite packaging bags

B1. Structure of composite packaging bag
The common structures of composite packaging bags are paper/plastic composite, plastic/plastic composite, aluminum/plastic composite, etc. The number of composite substrate layers can be two, three, four, five or even more.
Two-layer composite material:
Three-layer composite material: PET/BOPA/PE, PET/BOPA/CPP, PET/AL/PE, PET/AL/CPP, OPP/AL/PE, PET/VMCPP/PE, OPP/VMPET/PE, Paper/AL/PE; Four-layer composite material: PET/AL/ BOPA /PE, PET/AL/PET/PE, BOPA /AL/ BOPA /PE, PET/MPET/PE/EVA;
Five-layer composite material:PET/AL/PET/AL/PE, PET/AL/BOPA/AL/PE, PET/PE/AL/EVA/PE etc.
The main functions of each layer are:
Outer layer (strength support layer): for protection, frame, printing decoration, etc. (PET, BOPP, paper)
Middle layer (functional layer): generally acts as a barrier (AL, MPET, BOPA) 
Inner layer (heat sealing layer): generally used for heat sealing (LLDPE, LDPE, CPP)
    In practical applications, if the physical properties of the product are not too strict, the structure may only be the outer layer and the inner layer. For example, cosmetic bags usually require excellent chemical resistance and good barrier properties. Commonly used structures are: PET/AL/PE, OPP/AL/PE, PET/AL/PET/PE, etc. According to different applications, the basic structure of the composite packaging bag is as follows:
    Composite packaging bags can be used for food packaging, electrical product packaging, daily necessities packaging, clothing packaging and so on. They have one thing in common, that is, color printing is required for plastic films, and as food packaging, multi-layer composite or vacuum aluminum plating is also required. Therefore, the surface free energy and wet tension of the plastic film are required to be high, so as to facilitate the firm adhesion of printing ink, adhesive or aluminized layer to the plastic film; in the process of plastic film production and high-speed packaging, The surface of the film is required to have a certain friction performance to prevent the film from sticking or slipping; when used in the packaging of electrical appliances and electronic products, the film is required to have a certain anti-static performance and so on.
    Shanghai Duxia Industry and Trade Co., Ltd. is a modern enterprise specializing in the printing of plastic flexible packaging. We have worked in this industry for many years. If you need customized special packaging bags, please contact our sales company, welcome your inquiry!

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