What are the main raw materials for BOPP color thermosensitive synthetic paper?

The main raw materials for BOPP color thermosensitive synthetic paper include the following:

1.Polypropylene (PP) resin: This is the basic raw material for BOPP color thermosensitive synthetic paper, usually using isotactic polypropylene (iPP) because it has excellent physical and processing properties. Polypropylene resin provides the basic strength and toughness of the film.

2.Functional pigments or dyes: In order to impart color characteristics to BOPP paper, pigments or dyes need to be added. These pigments or dyes are mixed with polypropylene resin during the processing to ensure uniform color distribution and good light and weather resistance.

3.Additives: In order to improve the performance and processability of BOPP color thermosensitive synthetic paper, some additives will also be added. For example:

Antioxidant: Used to prevent oxidative degradation of polypropylene resin during processing and use.

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

Fluorescent whitening agent: used to improve the whiteness and brightness of paper.

Titanium dioxide: a commonly used white pigment used to improve the whiteness and coverage of paper.

4.Thermal sensitive coating material: The reason why BOPP colored thermal sensitive synthetic paper has thermal sensitive properties is because a layer of thermal sensitive coating is coated on its surface. This layer of coating is usually composed of thermochromic materials, adhesives, fillers, etc., which can undergo color changes when heated, thereby achieving thermal printing function.

5.Other auxiliary materials: According to production needs, some other auxiliary materials may be added, such as primer materials, protective layer materials, etc., to improve the printing adaptability and scratch resistance of the paper.

These raw materials are mixed, melted, extruded, stretched, coated, etc. under specific process conditions to ultimately produce BOPP colored thermosensitive synthetic paper with excellent performance and specific functions.