Because of its performance, the battery film of lithium battery determines the interface structure and internal resistance of the battery, which directly affects the capacity, cycle performance and safety performance of the battery. It is a high value-added material with the highest technical barriers in lithium battery materials. At present, the battery film has been widely used in military and civilian small electrical appliances, such as mobile phones, portable computers, video cameras, cameras and so on. After consulting the information, most of the equipment currently producing battery films in China, that is, plastic film stretch film machines or multi-layer plastic resin co-extrusion cast film machines, are mostly imported equipment.

The more commonly used lithium-ion battery separators mainly include polyimide separators, polyethylene separators, and polypropylene separators. At the same time, new separators have also been developed, such as: nanofiber separators, non-woven polymer composite membranes, polymer electrolyte separators, Polyethylene and polypropylene assembly of three-layer separators, etc.

The equipment used varies depending on the battery separator. The stretch film machine stretches a single-layer plastic film, while the multi-layer co-extrusion cast film machine is usually used for the co-extrusion of two or more layers of multi-layer films, which are processed from different plastic raw materials. The proportion and thickness of raw materials in each layer have a great relationship with the processing, performance and cost of the product. Precise control of the thickness of each layer of the co-extruded film during the production process plays a key role in ensuring the final performance of the product and controlling the cost of the product. The layer thickness ratio of the film is determined by the extrusion volume of each extruder, and there are many factors affecting the extrusion volume, such as the type of screw, the structure of the die, processing temperature, pressure, raw material properties, etc.

However, whether it is a plastic stretch film machine or an extrusion cast film unit, they are all commonly used in the field of mechanical equipment. In actual use projects, dust particles will be generated, which will be scattered into the air, and the staff will inhale it for a long time. Dust particles can cause pneumoconiosis and silicosis. In the advanced stage, lung gas does not form a large number of nodules, and it is extremely difficult to breathe. On the other hand, the work workshop is filled with the odor of plastic all the year round, and prolonged exposure to this environment will cause damage to the human respiratory mucous.

Plastic film drawing machine and co-extrusion cast film machine are mainly composed of feeding hopper, extruder, runner and die, and winding device. The plastic particles enter from the feeding hopper and flow out through the die after being melted by the extrudes. In the process, waste gas and dust are mainly generated during the stirring and extrusion process.

Brief introduction of grass green film drawing machine and co-extrusion cast film exhaust gas purification treatment equipment

Grass Green has rich experience in the field of waste gas treatment of plastic products. The waste gas generated by film stretching machine and co-extrusion cast film is oily waste gas, which needs to be treated by electrostatic treatment process. Grass Green recommends plasma waste gas filter and industrial electrostatic removal. Combination use of fume equipment, the effect is better.