What are the raw materials of long-acting heat-sensitive label paper?

The raw materials of long-acting heat-sensitive label paper mainly include the following:

1. Polyester Film (PET)

Characteristics: Polyester film is a polymer material with excellent heat resistance, cold resistance, chemical resistance and excellent mechanical properties. It can withstand high temperature, high humidity and high pressure and other harsh environment, uniform thickness, wear resistance, good texture, suitable for long-term storage.

Application: Polyester film because of its excellent performance, very suitable for the production of high-end labels, including long-acting three heat-resistant label paper.

2. Polypropylene Film (PP)

Characteristics: Polypropylene film is a transparent, good toughness material, with good electrical insulation, chemical resistance and high temperature resistance. The production process is mature and the cost is relatively low.

Application: Polypropylene film is widely used in a variety of labels and tapes, and also includes the production of some long-acting heat-resistant label paper.

3. Heat sensitive coating

Composition: The thermal coating is the core part of the thermal paper, which is generally composed of colorless dyes (such as fluorescent compounds), color developing agents (such as bisphenol, p-hydroxybenzoic acid), sensitizing agents, fillers and adhesives.

Function: The heat-sensitive coating will have a chemical reaction after heat, so that the colorless dye color, so as to achieve the printing function. In the long-acting three-heat-proof label paper, the heat-sensitive coating also needs to have waterproof, oil-proof, alcohol-proof and other characteristics to ensure the use of the label paper in harsh environments.

4. Protective layer

Function: The protective layer is usually located above the thermal sensitive coating and mainly plays the role of protecting the thermal sensitive coating. It can absorb part of the light that causes the chemical reaction of the thermal coating, slow down the deterioration of the printing paper, and protect the thermal components of the printer from damage.

Features: In the long-acting heat-resistant label paper, the protective layer also needs to have wear-resistant, friction-resistant, light-resistant, heat-resistant and other characteristics to extend the service life of the label paper.

5. Adhesive

Type: Long-acting three heat sensitive label paper usually uses hot melt adhesive as a adhesive. The initial viscosity of hot melt adhesive is good, and it can be applied to some labeling base surfaces with uneven surfaces.

Action: Adhesive is responsible for attaching the label paper to various substrates, ensuring the stability and durability of the label paper.

6. Backing paper material

Common materials: Base paper materials usually use release paper (commonly known as "base paper"), the surface is non-sticky with low surface energy, and has an isolating effect on adhesives. Commonly used base paper materials are white, blue, yellow glassine paper or onion paper, kraft paper, polyester (PET), coated paper, polyethylene (PE) and so on.

Function: The base paper material is used as the attachment of the face paper, which is convenient for the face paper to be peeled off from the base paper, and plays a supporting and protective role in the use process.

In summary, the raw materials of long-acting heat-resistant label paper mainly include polyester film or polypropylene film as the base material, thermal coating as the core part of the printing function, protective layer to protect the thermal coating and extend the service life of the label paper, hot melt adhesive as a adhesive to ensure the stability of the label paper, and the base paper material as the adhesion of the face paper. The selection and combination of these raw materials plays a crucial role in the performance and quality of long-acting thermal label paper.