What materials are suitable for production with a three-layer co extrusion blown film machine?

The three-layer co extrusion blown film machine has become an important equipment for plastic film production due to its multi-layer structure design, excellent physical properties, and wide application fields. With the continuous advancement of technology, three-layer co extrusion blown film machines will play an increasingly important role in the plastic processing industry, providing higher quality film products for various industries.

In order to meet the market's demand for high-performance plastic films, three-layer co extrusion blown film machines are constantly innovating in production technology. For example, developing new multi-layer co extrusion structures and channel designs to improve the barrier, optical, and mechanical properties of films; By utilizing nanotechnology and modification techniques to process plastic raw materials, special functional films such as antibacterial films, anti-static films, and high barrier films are developed to meet the packaging needs of high-end fields such as food, medicine, and electronics.

What materials are suitable for production with a three-layer co extrusion blown film machine?

Polyethylene (PE)

Low density polyethylene (LDPE): It has good flexibility, transparency, and low temperature resistance, and is commonly used in the production of various plastic films, such as agricultural films, packaging films, cling films, etc.

Linear low-density polyethylene (LLDPE): It has high strength, toughness, and puncture resistance, and is commonly used in the production of high-strength films, such as heavy-duty packaging bags, garbage bags, stretch films, etc.

High density polyethylene (HDPE): It has high rigidity, hardness, and heat resistance, and is commonly used in the production of industrial packaging films, liner films, shrink films, etc.

Polypropylene (PP)

Homo polypropylene (H-PP): It has high rigidity, hardness, and heat resistance, and is commonly used in the production of various plastic films, such as capacitor films, cigarette packaging films, food packaging films, etc.

Random copolymer polypropylene (R-PP): It has good transparency, flexibility, and low temperature resistance, and is commonly used in the production of transparent packaging films, heat sealing films, composite films, etc.

Block copolymer polypropylene (B-PP): It has high impact strength and toughness, and is commonly used in the production of high-strength packaging films, injection molded films, etc.

Ethylene vinyl acetate copolymer (EVA)

It has good flexibility, transparency, and low temperature resistance, as well as excellent thermal and adhesive properties, and is commonly used in the production of various functional films, such as agricultural films, packaging films, hot melt adhesive films, etc.

Polyvinyl chloride (PVC)

It has good mechanical properties, corrosion resistance, and weather resistance, and is commonly used in the production of various plastic films, such as construction films, advertising films, cling films, etc. However, due to the potential release of harmful substances during the production and use of PVC film, its application is somewhat limited.

Other materials

The three-layer co extrusion blown film machine can also produce films of special materials, such as polycarbonate (PC) film, polystyrene (PS) film, polyamide (PA) film, etc. These films have their own unique properties and can be applied in fields such as electronics, optics, and healthcare.

Three layer co extruded film is widely used in food packaging, pharmaceutical packaging, agricultural covering film, building materials, industrial packaging and other fields due to its excellent performance. For example, in food packaging, three-layer co extruded film can provide good oxygen and moisture resistance, extending the shelf life of food; In agricultural mulch film, three-layer co extruded film can have the functions of anti ultraviolet, anti-aging, heat preservation, etc.

The inflation ratio refers to the ratio of the diameter of the film after inflation to the diameter of the die head, while the traction ratio refers to the ratio of the traction speed to the extrusion speed. Reasonably adjusting the inflation ratio and traction ratio can control the thickness uniformity, mechanical properties, and optical properties of the film. Generally speaking, it is common for the inflation ratio to be between 2-4 and the traction ratio to be between 3-6, but the specific values need to be optimized according to different raw material and product requirements.