What is the difference between stone paper blown film process and cast film process
DATE：2024/11/4 10:32:27 / READ： / SOURCE：This station
Stone paper is a new type of environmentally friendly material, mainly composed of calcium carbonate and polyethylene (PE). It is produced through specific processes, among which blown film process and cast film process are two commonly used methods. Although both processes are used to manufacture thin films, they have significant differences in principles, equipment, product performance, and applications.
1、 Process principle
Film blowing process: Film blowing process is the process of extruding molten stone paper material, passing it through a circular die, and then using air to blow and expand the molten material into a thin film. During this process, the molten material forms a closed bubble under the action of air, which is then cooled and rolled into a roll. The characteristic of blown film is that it can produce larger thin films and has good performance in thickness uniformity and tensile properties.
Casting process: Casting process is the process of extruding molten stone paper material through a flat die to form a thin film on a horizontal or inclined plane. In this process, the molten material is pumped into the mold, flows and flattens, and then cooled and solidified by a cooling roller. The casting process is particularly suitable for manufacturing thicker films and composite materials, and its thickness can be precisely controlled, suitable for specific application requirements.
2、 Equipment requirements
Film blowing equipment: requires complex film blowing machines, including extruders, die heads, bubble control systems, etc. The equipment is relatively expensive and requires high maintenance and operation requirements.
Casting equipment: Casting machines usually have a simple structure, mainly composed of extruders, molds, and cooling rollers. The operation is relatively simple and suitable for small and medium-sized production.
Cast products: The thickness uniformity of the film produced by the cast process is better, the surface is smooth, and it is suitable for specific applications such as electrical insulation and special packaging.
4、 Application Fields
Blown film application: widely used in related fields such as plastic bags, packaging films, medical materials, etc., especially suitable for large-scale automated production.
Casting application: Usually used for special films with high requirements, such as labels, tapes, and other high-performance film materials, and can also be used in the production of composite materials.
In summary, the blown film and cast film processes of stone paper have their own characteristics in terms of process principles, equipment requirements, product performance, and application fields. The blown film process is suitable for large-scale production and can provide good product strength and toughness; The casting process has advantages in product thickness control and surface quality, making it suitable for specific high demand applications.
Film blowing process: Film blowing process is the process of extruding molten stone paper material, passing it through a circular die, and then using air to blow and expand the molten material into a thin film. During this process, the molten material forms a closed bubble under the action of air, which is then cooled and rolled into a roll. The characteristic of blown film is that it can produce larger thin films and has good performance in thickness uniformity and tensile properties.
Casting process: Casting process is the process of extruding molten stone paper material through a flat die to form a thin film on a horizontal or inclined plane. In this process, the molten material is pumped into the mold, flows and flattens, and then cooled and solidified by a cooling roller. The casting process is particularly suitable for manufacturing thicker films and composite materials, and its thickness can be precisely controlled, suitable for specific application requirements.
2、 Equipment requirements
Film blowing equipment: requires complex film blowing machines, including extruders, die heads, bubble control systems, etc. The equipment is relatively expensive and requires high maintenance and operation requirements.
Casting equipment: Casting machines usually have a simple structure, mainly composed of extruders, molds, and cooling rollers. The operation is relatively simple and suitable for small and medium-sized production.
3、 Product performance
Blown film products: Thin films produced by blown film technology usually have good strength and toughness, making them suitable as packaging materials. In addition, blown film has great flexibility in size and can produce films of different specifications.Cast products: The thickness uniformity of the film produced by the cast process is better, the surface is smooth, and it is suitable for specific applications such as electrical insulation and special packaging.
4、 Application Fields
Blown film application: widely used in related fields such as plastic bags, packaging films, medical materials, etc., especially suitable for large-scale automated production.
Casting application: Usually used for special films with high requirements, such as labels, tapes, and other high-performance film materials, and can also be used in the production of composite materials.
In summary, the blown film and cast film processes of stone paper have their own characteristics in terms of process principles, equipment requirements, product performance, and application fields. The blown film process is suitable for large-scale production and can provide good product strength and toughness; The casting process has advantages in product thickness control and surface quality, making it suitable for specific high demand applications.
Author：admin