What is the customization process for BOPP thermal sensitive synthetic paper?

The customization process of BOPP thermal sensitive synthetic paper usually includes the following key steps:

1、 Requirement analysis and communication

Clear requirements: Customers first need to clarify their own requirements, including paper specifications (such as size, thickness), color, printing effect, physical properties (such as tensile strength, wear resistance), etc.

Communication confirmation: Communicate the requirements with the supplier to ensure that both parties have a clear and accurate understanding of the requirements. Suppliers may provide preliminary suggestions or solutions based on the specific needs of customers.

2、 Raw material selection and proportioning

Main raw material selection: The main raw material for BOPP thermosensitive synthetic paper is polypropylene (PP) resin, especially isotactic polypropylene, whose content needs to reach a high standard (such as 95%~97%) to ensure the tensile strength and physical properties of the film.

Functional fillers and additives: Based on customer needs, functional fillers such as pigments and dyes, as well as antioxidants, lubricants, fluorescent whitening agents, titanium dioxide and other additives, are added to improve the processing performance of paper and the performance of the final product.

Proportioning and Mixing: Mix the raw materials evenly in a certain proportion to ensure stable performance of the final product.

3、 Production and processing

Plasticization and Extrusion: The mixed raw materials are fed into an extruder for plasticization. The processing temperature of the extruder is generally around 250 ℃, and the specific temperature is adjusted according to the temperature resistance of the raw materials and the performance of the extruder. During the plasticization process, the raw materials undergo high temperature and high pressure in the extruder, melting into a uniform melt.

Casting and stretching: The molten polypropylene is extruded into thick sheets through a die and rapidly cooled into regular thick sheets. Then, the cast sheet is subjected to longitudinal and transverse stretching treatment. During the stretching process, the temperature in the preheating zone, stretching zone, and shaping zone, as well as the stretching speed, need to be controlled to achieve bi-directional stretching of the film.

Surface treatment: Perform corona treatment or other surface treatments on the stretched film as needed to improve the surface tension of the film and enhance the adhesion of the coating layer.

Coating and winding: Apply thermosensitive coating, primer, and protective layer on the surface of the film, and strictly control the composition, concentration, and coating amount of the coating liquid during the coating process. After coating, roll the film into a uniform large roll. During the winding process, control the tension of the contact roller and pressure roller to maintain the flatness and tightness of the large roll.

4、 Cutting and time processing

Slitting: Cut the large film roll into appropriate sizes according to customer requirements, and strictly control the slitting accuracy and edge quality during the slitting process.

Aging treatment: The sliced film is subjected to aging treatment, which is generally completed within 24-48 hours to improve the physical properties and stability of the film.

5、 Quality inspection and delivery

Quality inspection: Conduct quality inspection on the aged film, including appearance quality, physical properties, printing effect, etc., to ensure that the final product meets relevant standards and customer requirements.

Delivery: After passing the quality inspection, the product will be delivered to the customer. During the delivery process, it may be necessary to provide relevant product manuals, quality assurance certificates, and other documents.

In summary, the customization process of BOPP thermal sensitive synthetic paper is a complex and delicate process that requires close cooperation and communication between suppliers and customers. By clarifying requirements, selecting appropriate raw materials and ratios, meticulous production and processing, strict quality inspection and delivery, etc., it can be ensured that the final product meets the expectations and requirements of customers.