What is the production process of BOPP color thermal synthetic paper?

The production process of BOPP color thermal synthetic paper is a relatively complex process, which combines the manufacturing technology of BOPP (biaxially stretched polypropylene) film and the application of thermal coating. The following is a general production process:

First, raw material preparation

1.Polypropylene resin: The selection of high-quality polypropylene resin as the main raw material requires a high molecular weight, narrow molecular weight distribution and good processing performance.

2.Additives: According to the need to add antioxidants, antistatic agents, smoothing agents and other additives to improve the performance of the film.

3.Thermal coating raw materials: raw materials required to prepare thermal coatings, including color developers, adhesives, dyes, etc., which will be used to form thermal coatings to give the paper the function of thermal printing.

Second, mix ingredients

1.The polypropylene resin and additives are added to the high-speed mixer according to a certain proportion, and the mixture is fully stirred and mixed to ensure the uniform distribution of raw materials.

2.For thermal coatings, it is also necessary to mix each component raw material evenly according to the formula ratio to prepare a thermal coating solution.

Third, extrusion casting

1.The mixed polypropylene raw material is melted and extruded by the extruder to form a certain thickness sheet. In the extrusion process, it is necessary to strictly control the temperature, pressure and extrusion speed to ensure the quality and thickness uniformity of the sheet.

Fourth, bidirectional stretching

1.The extruded sheet is biaxially stretched, that is, stretched longitudinally and transversely, to increase the strength and toughness of the film. The stretching process needs to be carried out at a certain temperature and tension to ensure the quality and performance of the film.

Fifth, coating

1.The surface of the biaxially stretched BOPP film is coated with a heat-sensitive coating. This step is usually carried out using a coating machine, where the thermal sensitive coating solution is evenly applied to the surface of the film. The coating quantity, coating speed and coating temperature should be controlled during the coating process to ensure the quality of the coating.

Sixth, heat treatment and curing

1.The film coated with a heat-sensitive coating is heat treated to eliminate internal stress, improve dimensional stability and promote the curing of the coating. The temperature and time need to be controlled during the heat treatment process to avoid film deformation or coating aging.

Seventh, winding and cutting

1.After heat treatment and curing, the BOPP color thermosensitive synthetic paper is rolled to form a rolled product.

2.According to customer needs to be cut, to get a certain width and length of the finished product.

Eighth, quality control and inspection

1.In the entire production process, the quality control and inspection of raw materials, semi-finished products and finished products are required to ensure that the products meet the relevant standards and customer requirements.

Ninth, packaging and delivery

1.The qualified BOPP color thermal synthetic paper is packaged to prevent damage during transportation and storage.

2.Deliver products to customers according to customer demand and order requirements.

It should be noted that the production process of BOPP color thermal synthetic paper may vary according to different manufacturers, different product specifications and customer needs. Therefore, in the actual production process, it is necessary to optimize and adjust the process according to the specific situation.

In addition, with the progress of science and technology and the change of market demand, the production process of BOPP color thermal synthetic paper is also constantly innovative and improved to improve product quality, reduce costs, and meet the needs of a wider range of applications.