Composite Roll Film: A Comprehensive Popular Science Guide

In the modern packaging industry, composite roll film is a widely used flexible packaging material that integrates multiple functional advantages. It is formed by compounding two or more different types of films through professional processes, making up for the defects of a single film and meeting the diverse packaging needs of various industries. This article will systematically introduce the definition, structure, types, application scenarios and core advantages of composite roll film, helping you fully understand this essential packaging material.

First of all, let’s clarify the definition of composite roll film. Composite roll film refers to a roll-shaped flexible packaging material made by bonding two or more layers of base materials (such as plastic film, aluminum foil, paper, etc.) through adhesive, heat sealing or other composite processes. Its core feature is that it combines the advantages of each layer of base material, such as the barrier property of aluminum foil, the transparency of PET film, the flexibility of PE film, and the printability of BOPP film, so as to achieve comprehensive performance that a single film cannot match.

The structure of composite roll film is usually composed of three parts: surface layer, middle layer and inner layer, each of which undertakes different functions. The surface layer is mainly responsible for protection and printing, requiring good transparency, gloss and printability, so that the packaging can display product information and brand image clearly; common surface layer materials include BOPP, PET and other films. The middle layer is the core functional layer, mainly used to enhance the barrier performance (such as moisture resistance, oxygen resistance, light resistance), mechanical strength and heat resistance of the film; common middle layer materials include aluminum foil, EVOH, PA and so on. The inner layer is in direct contact with the product, requiring non-toxic, tasteless, good heat sealing and compatibility with the product; common inner layer materials include PE, CPP and other films. The reasonable combination of the three layers enables the composite roll film to adapt to different product packaging requirements.

According to the different composite materials and processes, composite roll film can be divided into many types. According to the number of layers, it can be divided into two-layer composite film (such as BOPP/PE, PET/PE), three-layer composite film (such as BOPP/PET/PE, BOPP/AL/PE) and multi-layer composite film (more than three layers). According to the functional characteristics, it can be divided into barrier composite roll film, heat-sealable composite roll film, anti-fog composite roll film, biodegradable composite roll film and so on. Among them, biodegradable composite roll film has become a hot spot in recent years with the promotion of global environmental protection policies.

Composite roll film has a wide range of applications, covering food, daily chemicals, medicine, agriculture, electronics and other fields. In the food industry, it is widely used in the packaging of snacks, dried goods, frozen food, meat products, dairy products and other products, which can effectively isolate moisture, oxygen and bacteria, extend the shelf life of food and maintain the original flavor of food. In the daily chemical industry, it is used for the packaging of cosmetics, toiletries, cleaning products and other products, which can prevent the volatilization of ingredients and moisture absorption and deterioration. In the medical field, it is used for the packaging of medical devices and drugs, requiring high barrier performance and sterility to ensure the safety of products. In the agricultural field, it is used for seed packaging and agricultural product packaging, which can protect seeds and products from external damage.

Compared with single-layer film and other packaging materials, composite roll film has obvious advantages. First, it has comprehensive performance, which can simultaneously meet the requirements of protection, barrier, printing, heat sealing and other aspects, and is suitable for various complex packaging scenarios. Second, it has high mechanical strength, good tensile resistance, puncture resistance and wear resistance, which can avoid damage during transportation and storage. Third, it has good printability, and can print high-definition patterns, text and logos, helping enterprises enhance brand awareness and product competitiveness. Fourth, it is lightweight and easy to use, which can reduce packaging costs and improve packaging efficiency. For biodegradable composite roll film, it also has the advantage of environmental protection, which can effectively reduce white pollution and conform to the global low-carbon and environmental protection trend.

In conclusion, composite roll film, as a multi-functional flexible packaging material, plays an irreplaceable role in the modern packaging industry. With the continuous development of science and technology and the upgrading of market demand, the types and performance of composite roll film will be continuously optimized and improved, especially the biodegradable type, which will have a broader development prospect. Understanding the relevant knowledge of composite roll film is not only helpful for us to choose appropriate packaging materials in daily life and work, but also conducive to understanding the development trend of the packaging industry.

Qingdao Fullsun Biotechnology Co., Ltd. is a manufacturer specializing in the production of biodegradable heat shrink wrapping film, composite printed roll film, biodegradable garbage bags and biodegradable shopping bags. Our products are certified by the U.S. soil and marine biodegradation standards. After use, the products can be buried in soil 50 cm deep, where they will naturally degrade into water, carbon dioxide and methane within 360 days. They degrade even better in seawater environments, solving the problem of white plastic pollution. Click on our website to get samples! //www.fullsunbiopackaging.com/