What raw materials are needed to make colored thermosensitive synthetic paper?

The main raw materials for producing colored thermosensitive synthetic paper include the following categories:

1、 Main raw materials

Polypropylene (PP) resin, especially isotactic polypropylene, is the main component of colored thermosensitive synthetic paper, and its content usually needs to reach a high standard (such as 95%~97%) to ensure the tensile strength and physical properties of the film.

2、 Functional fillers

Pigments and dyes: used to give paper specific colors and functional characteristics. The selection of these pigments and dyes needs to be determined based on the final use and color requirements of the product.

3、 Additives

Antioxidant: Used to prevent the degradation of polypropylene resin due to oxidation during processing and use, thereby improving the stability and service life of the product.

Lubricant: Helps improve the processing performance of polypropylene resin, reduce friction and energy consumption during the processing.

Fluorescent whitening agent: used to improve the whiteness and brightness of paper, making the printing effect clearer and more vivid.

Titanium dioxide: As an important white pigment, it can be used to enhance the whiteness and coverage of paper.

4、 Thermal sensitive coating material

Hidden dye: also known as colorless dye, is one of the key components in thermal sensitive coatings. When heated, the latent dye undergoes a chemical reaction, resulting in the appearance of color.

Color developer: Plays a catalytic role in thermosensitive reactions and participates in color development reactions together with latent dyes.

In addition, with the continuous advancement of technology and the application of new materials, the raw materials for producing colored thermosensitive synthetic paper are also constantly updated and upgraded. For example, some high-performance, environmentally friendly, and special functional materials (such as high molecular weight polypropylene, modified polypropylene, biobased additives, halogen-free flame retardants, waterproof and oil resistant coatings, antibacterial coatings, nanomaterials, etc.) are also widely used in the production of colored thermal sensitive synthetic paper to improve product performance, environmental friendliness, and application scope.

In summary, the production of colored thermosensitive synthetic paper requires precise proportioning and synergistic effects of multiple raw materials. The selection and ratio of these raw materials need to be determined based on the final use, performance requirements, and environmental standards of the product.