High-Performance Sheet, Plate & Film Extrusion Machines

Extrusion is a manufacturing process where melted plastic is forced through a die to form continuous products like sheets, pipes, or films.

These refer to specific measurements of filament or film thickness, width, and tensile strength in the extrusion process — important for textile and film applications.

Casting EVA film is widely used for solar cell encapsulation, medical film, and packaging due to its flexibility and transparency.

Yes, Bekwell’s precision control and cleanroom-compatible design make it suitable for extrusion in medical and pharmaceutical packaging applications.

Yes. Bekwell offers modular systems allowing pipe extrusion and film extrusion configurations in the same production environment.

​​Comparison Dimension​​	​​Multi-layer Co-extrusion Cast Film Technology​​	​​CPP Cast Film Technology​​
​​Core Technology​​	Multi-group casting and composite, combining different resin materials	Specialized in polypropylene (PP) material systems
​​Automation Level​​	Single/double-sided online composite, fully automated process	Emphasizes intelligent control systems and full automatic adjustment (e.g., online closed-loop control of die)
​​Energy Efficiency​​	High-efficiency, low-energy design with optimized production energy consumption	Specifically emphasizes energy-saving and eco-friendly design to reduce production costs
​​Structural Design​​	Multi-unit configuration for complex structures	Compact design with low vibration and noise, easy to install and maintain
​​Die System​​	Multi-layer co-extrusion die (5-7 layers), streamlined distributor structure, optimized interlayer flow	T-type die, optimized via fluid simulation for uniform thickness
​​Cooling System​​	Cooling air ring + specially surface-treated cooling rollers with intelligent temperature control	Thin-walled high-efficiency cooling rollers + spiral flow channel design for stable forming at high speeds
​​Control System​​	Integrated operation interface for real-time monitoring of extruder, haul-off, and other parameters	Emphasizes online closed-loop control for stable production
​​Layer Capability​​	Supports 5-7 layer co-extrusion	Primarily single-layer or basic multi-layer structures
​​Functional Characteristics​​	Multi-functional composite (barrier properties, mechanical strength, optical performance, etc.)	Excellent heat-sealing, transparency, and gloss
​​Production Speed​​	High-speed production with reduced processing steps	Focuses on stable high-speed production
​​Thickness Control​​	Precise multi-layer thickness control, minimizing interlayer disturbance	High uniformity in thickness control with superior surface quality
​​Common Applications​​	Food packaging, daily goods packaging, pharmaceutical packaging	Food packaging, daily goods packaging, pharmaceutical packaging
​​Specialized Applications​​	New energy (photovoltaic backsheets), functional films (TPU composite films), high-end composite packaging	Hygiene products (diaper/sanitary napkin backing films), agricultural mulch films, industrial protective materials
​​Technical Advantages​​	Higher material combination flexibility, integrating multiple functions for high-value-added products	Specialized PP processing technology with superior surface smoothness for specific applications (e.g., hygiene products)
​​Extrusion System​​	Multiple specialized extruders for independent material feeding	High-efficiency screw design for stable, high-output production
​​Processing Precision​​	Focuses on interlayer control precision	Specifically emphasizes high-precision processing to extend equipment lifespan
​​Market Positioning​​	High-end composite films, functional films	General-purpose CPP films with adaptability to specialized applications
​​Energy Saving & Eco-Friendliness​​	Optimized design for reduced energy consumption	Equipment design meets environmental standards with lower energy consumption
​​Typical Products​​	CPP/CPE composite films, TPU cast films, photovoltaic backsheets	Food packaging films, hygiene product backing films, agricultural mulch films

 

Film extrusion and blown film extrusion are two major technologies used to produce plastic films, but they differ significantly in process, structure, and application.

In film extrusion (also known as cast film extrusion), melted plastic is extruded through a flat T-die to form a thin sheet. The film is then rapidly cooled on a chill roll, resulting in a smooth, glossy surface and excellent thickness uniformity. This process is ideal for materials such as PP, PET, PS, PC, ABS, and EVA, and is commonly used to produce rigid or semi-rigid films for packaging, thermoforming, and industrial applications.

In contrast, blown film extrusion involves extruding the molten plastic through a circular die to create a tubular film. Air is blown into the center of the tube to expand it like a bubble, which is then cooled by air rings and flattened into film rolls. This method is typically used with PE and EVA materials and is best suited for flexible packaging films, such as plastic bags, shrink wraps, and agricultural films.

The key difference lies in the film form and cooling method:

• Film extrusion produces flat sheets using roll cooling, resulting in high precision and optical clarity.
• Blown film extrusion forms tubular films using air cooling, offering flexibility, strength, and lower material cost.

In summary, film extrusion is preferred when surface quality and dimensional accuracy are critical, while blown film extrusion excels in flexibility and cost-effective film production for packaging industries.