Plastic Film Line MDO Nip Roller Silicon Rubber Coated

MDO Nip Roller Basis Information

The MDO stretching process of biaxially oriented plastic film production line (BOPP, BOPET and other materials) is a crucial link in its production process, which directly affects the physical properties of the film and the quality of the final product. The following is a detailed process description of the stretch part of the bidirectional stretch film production line:

1. Preheating. Before stretching, the film material first needs to be preheated. This process is usually carried out under the action of MDO heating roller and MDO nip roller , and the purpose is to bring the film to a certain temperature, thereby reducing its viscosity and increasing its stretchability. By heating, the activity of the molecular chain structure of the film is enhanced, which lays the foundation for the subsequent stretching.

2. Machine direction Ooriented. After the preheating is completed, the film enters the stretching zone. The process is usually by a machine direction oriented device between two rollers (stretching roller and MDO nip roller) of unequal speed. The film is sandwiched between rollers and then moved quickly on one side while the other side moves relatively slowly, causing the film to stretch along its machine direction. During this process, the thickness of the film decreases while the length increases. Machine direction oriented usually increases the strength and toughness of the film significantly.

3. Cooling. After the machine direction oriented is complete, the film passes through a cooling zone to ensure that the film retains its new shape and solidifies its molecular structure after stretching. This cooling process helps lock in the directional state of the molecular chain, preventing the film from shrinking during subsequent processing.

MDO Nip Roller Features

Surface Quality: The nip Rollers have a flat, smooth, centered, and round surface to ensure continuous sealing against each other.

Durometer: The covering on the Rubber Roller is designed to be soft, allowing it to conform well to the film passing between the rollers, especially folded edges or gusseted films.

Trapping Air: The nip rollers are designed to trap air inside the bubble of the film, especially in conventional non-IBC air ring cooling systems.

Roller Repair: If the rubber roller's surface becomes worn or damaged, it can be repaired by regrinding or recovering, although this may result in substantial downtime on the production line.

MDO Nip Rller Benefits

Consistent Speed: The primary nip rollers in the blown-film process ensure a consistent speed, which directly affects film quality and profitability.

Bubble Stability: By trapping air inside the bubble, the nip rollers help maintain bubble stability during the film production process.

Film Quality: The flat and smooth surface of the nip rollers prevents defects such as creasing or film damage caused by crushing the folds.

Uniform Pressure: The nip rollers apply uniform pressure across the film, ensuring consistent and equal roll speed and uniform pressure between the rollers.

Defect Detection: The use of nip impression films, such as Fujifilm Prescale, can help diagnose issues related to roller alignment, parallelism, and pressure load distribution.

MDO Nip Roller Production Standard

About us

Huatao Group was founded in 2008. We are a professional and leading supplier of various rollers for paper machine, corrugator, rubber & plastic industry, nonwoven fabric industry over 15 years of experience.

Paper Industry: forming roller, vacuum couch roller, dandy roller, breast roller, rubber press roller, stone press roller, rubber roller, dryer cylinder, size press roller, calender roller, pope reel roller, spreader roller, embossing roller.

Plastic & Rubber industry: chill roller, MDO preheating roller, MDO nip roller, MDO stretching roller, PRS cooling roller, corona treater roller, corona treatment nip roller, flame treatment roller, CFRP contact roller, CFRP tension roller, CFRP nip roller, winding core, coating drum, cooling drum, spreader roller, anilox roller, calender roller, embossing roller.

Nonwoven fabric industry: cylinder roller, doffer roller, CFRP guide roller, embossing roller, cooling roller, spreader roller.

With a strong commitment to innovation, reliability, and customer satisfaction, Huatao Group has become a trusted provider in the industry and our products have been exported to more than 96 countries and have a good reputation.

Huatao understands that each customer may have different requirements, which cannot meet from one factory, but we can meet, we are also familar with domestic factory advantages with matching superior quality and help customer not walk bend road.

We pursue each customer is buying and using HUATAO products with a rest assured heart and service is never end.