What are the main chemical components of BOPP colored thermosensitive synthetic paper?

The main chemical components of BOPP color thermosensitive synthetic paper include the following parts:

1、 Basic raw materials

Polypropylene (PP) resin, especially isotactic polypropylene, is the main raw material for BOPP color thermal sensitive 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 components

Hidden dye: colorless at room temperature and is one of the key components in thermosensitive reactions. When paper encounters a heat source, the latent dye undergoes a chemical reaction under the catalytic action of the color developer, causing a structural change and 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.

Sensitizer: Used to improve the sensitivity of thermal sensitive coatings, allowing paper to undergo color reactions at lower temperatures.

3、 Additives

Antioxidant: Used to prevent oxidative degradation of polypropylene resin during processing and use, and improve the weather resistance and stability of paper.

Lubricant: Helps with the flow and plasticization of raw materials in the extruder, reducing energy consumption and improving production efficiency.

Fluorescent whitening agent: used to improve the whiteness and brightness of paper, and enhance visual effects.

Titanium dioxide: Used as a pigment to give paper specific colors and functional properties.

4、 Thermal sensitive coating

Water based resin: used as a base material for coatings, to fix chemical substances such as hidden dyes, color developing agents, and sensitizers on the surface of BOPP films.

Other chemicals: may also include some chemicals used to adjust coating performance, improve adhesion, and weather resistance.

In the manufacturing process of BOPP color thermosensitive synthetic paper, these chemical components are uniformly mixed, plasticized, and coated on the surface of BOPP film through specific process formulas and processing techniques, forming a stable thermosensitive coating. When the paper encounters a heat source, the chemical substances in the coating will undergo a chemical reaction, thereby achieving rapid color development and vivid colors.