Differences in coating and casting processes of TPU adhesive film production lines
DATE：2023/7/14 14:15:37 / READ： / SOURCE：This station
The coating process and tape casting process of TPU Hot-melt adhesive film production line are two commonly used methods for preparing Hot-melt adhesive film. There are some differences in their principles, equipment, and process flow. Below, I will provide a detailed introduction to the characteristics and differences between these two processes.
Coating process:
The coating process is the process of evenly coating Hot-melt adhesive material on the substrate through the coating head, and then forming a film through drying, cooling and other process steps.
Process flow:
(1) Raw material preparation: prepare TPU Hot-melt adhesive according to a certain formula.
(2) Spray coating: evenly apply Hot-melt adhesive on the base material through the spray head.
(3) Drying: The coated substrate is sent into an oven and the solvent is evaporated by the action of hot air to solidify the adhesive film.
(4) Cooling: Quickly cool the dried adhesive film through a cooling device to achieve the required mechanical properties.
(5) Rewinding: the prepared Hot-melt adhesive film is coiled through the winding device.
Features:
(1) High production efficiency: The coating process can achieve continuous production with high production efficiency.
(2) Uniform film preparation: The coating process can achieve precise control of film thickness, and the prepared film has good uniformity.
(3) Wide applicability: The coating process is suitable for preparing Hot-melt adhesive films of different thicknesses and purposes.
Casting process:
The tape casting process is a process in which the Hot-melt adhesive is extruded into a film by an extruder, and then the film is formed by cooling, stretching and other process steps.
Process flow:
(1) Raw material preparation: prepare TPU Hot-melt adhesive according to a certain formula.
(2) Extrusion: extrude the Hot-melt adhesive material into a film shape through the screw extrusion mouth of the extruder.
(3) Cooling: the extruded Hot-melt adhesive film is cooled rapidly through a cooling device to achieve the required mechanical properties.
(4) Stretching: The cooled adhesive film is stretched through a stretching device to change its physical properties.
(5) Rewinding: the prepared Hot-melt adhesive film is coiled through the winding device.
Features:
(1) Fast production speed: The casting process can achieve high-speed extrusion, resulting in faster production speed.
(2) Wide film preparation: tape casting process can prepare wide Hot-melt adhesive film, suitable for large area applications.
(3) Good mechanical properties: tape casting process can improve the mechanical properties of Hot-melt adhesive film by stretching and other process steps.
Summary:
Both coating process and tape casting process are commonly used to prepare TPU Hot-melt adhesive film. The coating process is suitable for preparing Hot-melt adhesive films with thin thickness and high uniformity requirements; The tape casting process is suitable for preparing Hot-melt adhesive films with wide width and high mechanical properties. The selection of which process method should be comprehensively considered based on factors such as specific product requirements, production efficiency, and equipment conditions.
Coating process:
The coating process is the process of evenly coating Hot-melt adhesive material on the substrate through the coating head, and then forming a film through drying, cooling and other process steps.
Process flow:
(1) Raw material preparation: prepare TPU Hot-melt adhesive according to a certain formula.
(2) Spray coating: evenly apply Hot-melt adhesive on the base material through the spray head.
(3) Drying: The coated substrate is sent into an oven and the solvent is evaporated by the action of hot air to solidify the adhesive film.
(4) Cooling: Quickly cool the dried adhesive film through a cooling device to achieve the required mechanical properties.
(5) Rewinding: the prepared Hot-melt adhesive film is coiled through the winding device.
Features:
(1) High production efficiency: The coating process can achieve continuous production with high production efficiency.
(2) Uniform film preparation: The coating process can achieve precise control of film thickness, and the prepared film has good uniformity.
(3) Wide applicability: The coating process is suitable for preparing Hot-melt adhesive films of different thicknesses and purposes.
Casting process:
The tape casting process is a process in which the Hot-melt adhesive is extruded into a film by an extruder, and then the film is formed by cooling, stretching and other process steps.
Process flow:
(1) Raw material preparation: prepare TPU Hot-melt adhesive according to a certain formula.
(2) Extrusion: extrude the Hot-melt adhesive material into a film shape through the screw extrusion mouth of the extruder.
(3) Cooling: the extruded Hot-melt adhesive film is cooled rapidly through a cooling device to achieve the required mechanical properties.
(4) Stretching: The cooled adhesive film is stretched through a stretching device to change its physical properties.
(5) Rewinding: the prepared Hot-melt adhesive film is coiled through the winding device.
Features:
(1) Fast production speed: The casting process can achieve high-speed extrusion, resulting in faster production speed.
(2) Wide film preparation: tape casting process can prepare wide Hot-melt adhesive film, suitable for large area applications.
(3) Good mechanical properties: tape casting process can improve the mechanical properties of Hot-melt adhesive film by stretching and other process steps.
Summary:
Both coating process and tape casting process are commonly used to prepare TPU Hot-melt adhesive film. The coating process is suitable for preparing Hot-melt adhesive films with thin thickness and high uniformity requirements; The tape casting process is suitable for preparing Hot-melt adhesive films with wide width and high mechanical properties. The selection of which process method should be comprehensively considered based on factors such as specific product requirements, production efficiency, and equipment conditions.
Author：admin