1、 Composition of production line
The lithium battery packaging aluminum-plastic film production line mainly consists of several key parts, including raw material preparation, extrusion composite, winding and slitting. Among them, the extrusion composite part is the core of the production line, which is responsible for compounding multiple layers of materials (such as nylon, aluminum foil, polypropylene, etc.) through an extruder to form aluminum-plastic films with specific structures and properties.

2、 Production process
The production process of aluminum-plastic film is mainly divided into two types: dry method and hot method:

Dry process:
Principle: The aluminum foil layer is tightly bonded to the polypropylene (CPP) layer using adhesive, and then pressed together.
Characteristics: The dry process does not require high equipment requirements, but the process flow is relatively complicated and the operational difficulty is high.
Advantages: Dry process aluminum-plastic film has good formability and is suitable for packaging batteries of various shapes.
Representative enterprises: Xinlun New Materials, Showa Electric, etc.
Thermal process:
Principle: The aluminum foil layer is compounded with a polypropylene layer (or other thermoplastic material) through co extrusion laminating process, sandwich laminating process, or heat bonding process. The core of these processes lies in controlling temperature and pressure conditions to induce thermal synthesis reactions between materials.
Characteristics: There are many types of thermal processes with high production efficiency, but the equipment and technical requirements are also relatively high.
Advantages: Thermal aluminum-plastic film has excellent adhesion and electrolyte resistance, suitable for high-end battery packaging.
Representative enterprise: DNP、 Xinlun New Materials, etc.
3、 Characteristics of production line
High degree of automation: The lithium battery packaging aluminum-plastic film production line adopts highly automated equipment and technology, achieving full process automation control from raw material preparation to finished product output.
High production efficiency: The production line has efficient production capacity and can quickly produce a large number of high-quality aluminum-plastic film products.
Stable product quality: Through precise control and testing methods, ensure that the produced aluminum-plastic film products have stable structure and performance.
Strong flexibility: The production line can flexibly adjust production parameters and process flow according to different customer needs and order requirements, producing aluminum-plastic film products with different specifications and properties.
4、 Market Applications and Development Trends
Market application: Aluminum plastic film, as an important packaging material for soft pack lithium batteries, has been widely used in various fields such as consumer electronics, new energy vehicles, military, medical, and electric tools. With the continuous development of these fields, the demand for aluminum-plastic films is also growing.
Development trend: In the future, with the increasing maturity of solid-state battery technology and the acceleration of commercialization, aluminum-plastic film enterprises need to develop products specifically designed for solid-state batteries to meet their requirements for high chemical corrosion resistance, high mechanical strength, and excellent sealing performance. At the same time, the application areas of aluminum-plastic film will continue to expand to other emerging fields, such as aerospace, medical devices, and smart wearables. The development of these fields and the urgent demand for high-performance batteries will bring a broader market space for aluminum-plastic films.