sales@yjmachinery.com
+86 17616798109
News
Our company offers customized services and turnkey projects for the design and manufacture, installation and commission, personnel training, after-sales maintenance, etc. of biaxially oriented stretching film production line.
Biaxially Oriented Film Production Line-----------MDO System
2024-07-15
The biaxially oriented film production line is a key equipment for manufacturing high-quality films. The MDO system plays a vital role in the entire production process. This article will deeply explore the MDO system in the biaxially oriented film production line and introduce its function, principle, structure and application.
Function of longitudinal stretching system
The longitudinal stretching MDO system in a biaxially oriented film production line usually consists of a set of rolls and a tension control system. Its main function is to machine direction stretch the film during the film production process to improve the physical properties and appearance quality of the film. By stretching in the machine direction, the film can have better tensile properties, transparency and flatness, thus meeting the film quality requirements of different industries.
Principle of MDO system
The MDO system controls the speed and tension of the rolls to stretch the film to a certain extent in the machine direction. In the biaxially oriented film production equipment, the MDO system is usually used in conjunction with the TDO system to work together on the film stretching process, thereby achieving the biaxial stretching effect of the film. By reasonably adjusting the parameters of the MDO system, the film stretching ratio and speed can be accurately controlled to obtain a film product that meets the requirements.
Structure of MDO
The MDO system is mainly composed of multiple preheating rolls, stretching rolls, shaping rolls, cooling rolls, far-infrared heater, transmission system, film-threading device and other control device. Machine direction stretching can be divided into three types: large gap single-gap stretching, two-gap stretching and small gap single-gap, two-gap, and multi-gap stretching. The heating medium in the roll can be circulating heated oil or water or steam.
The tension control device is responsible for monitoring and adjusting the tension of the film during the machine direction stretching process to ensure the stability and consistency of the stretching effect. The roll group is composed of multiple rolls. By adjusting the layout and spacing of the rolls, different degrees of stretching of the film can be achieved. The transmission system is responsible for transmitting power and driving the operation of the roll group, so as to achieve the smooth progress of the machine direction stretching process.
Application of MDO system
MDO system is widely used in biaxially oriented film production lines. In the fields of food packaging, medical devices, building materials, etc., high-quality biaxially oriented films are widely used in BOPA packaging film production line, PP lithium battery separator film production line, BOPP capacitor film production line and other purposes. As an important part of biaxially oriented film production equipment, MDO system plays a key role in the stretching process of film. Through reasonable design and precise control, MDO system can achieve precise control of film stretching effect, produce high-quality biaxially oriented film products, meet the needs of different industries for film quality, and promote the development and innovation of film industry.
