The downward rotation of a three-layer co-extrusion film blower refers to the continuous 360-degree rotation of the film blower head when blowing film. The membrane is circulated 360 degrees to eliminate the phenomenon of "rebound tendons" caused by the thickness of the membrane vesicles. One traction and the herringbone are always stationary. The film is prone to wrinkles and the strength of the film decreases. If the blow-up ratio is too small, the consumption will increase and the effective volume of the product will decrease.

At the same time, the product becomes thicker and the cooling time becomes longer, which increases the cost. Blow Membrane is a plastic processing method. It refers to a plastic processing process that melts plastic particles and blows them into thin films by heating, melting, and then blowing them into thin films. Typically, polymer is extruded into tubular billets, which are blown up to the required thickness by high pressure air in a better melt flow state and then cooled and shaped into thin films.

If the film is blown out with the new material, the color is uniform, clean and the finished product is stretched well. If plastic particles made from recycled waste plastics are usually pigmented when they are made into thin films, they may be unevenly colored, crisp and fragile and have a lower price. Linear low density PE (LLDPE) is available. HDPE film grade is generally used where excellent stretchability and good impermeability are required.

For example, HDPE membranes are often used in commodity bags, grocery bags, and food packaging. PE film processing is usually done by ordinary blowing or flat extrusion. HDPE film grade is generally used where excellent stretchability and good impermeability are required. For example, HDPE membranes are often used in commodity bags, grocery bags, and food packaging. PE film processing is usually done by ordinary blowing or flat extrusion.