Composition of sticker printing material

/ October 10, 2019

Self-adhesive materials, also known as self-adhesive materials, pressure-sensitive materials or sticky notes, are the basic materials for label printing and are mainly used for packaging, decoration and printing.

Self-adhesive materials can be divided into self-adhesive printing materials, decoration materials, sealing materials, and special materials according to their different uses. Here, the adhesive printing materials are mainly introduced.

The basic composition of sticker printing material. It consists of a surface print layer, an adhesive layer, and a release layer.

Surface printing layer

The surface printing layer generally uses the following two materials, namely, a paper-based printing layer and a thin film printing layer.

(1) Paper-based printing layer. Paper-based printing layers currently use more offset paper, coated paper, bright and colored light and fluorescent paper, aluminum foil and other special paper. The requirements for the paper-based printing layer should comply with relevant national standards.

(2) Thin film print layer. Thin film print layers include the following types.

1 transparent film. The transparent film is divided into a composite film and a printing film.

Composite film. Mainly include polypropylene film (PP), polyethylene film (PE) and polyvinyl chloride film (PVC). Printing film. Mainly include polyester film (PET), polyethylene film (PE) and polyvinyl chloride film (PVC).

2 translucent film. Including polyester film (PET) and polyethylene film (PE).

3 opaque film. There are mainly gold polyester film and silver polyester film.

4 color film. General use polyvinyl chloride film.

5 special film.

Adhesive layer

The adhesive layer is closely related to the performance and application range of the adhesive printing material and is one of the important performance indicators of the adhesive printing material.

There are three types of adhesives: rubber, resin, and hybrid.

The main performance indicators for adhesives are as follows:

Coating thickness: 0. 02 ± 0. 005mm;

Viscosity (25 °C): 6 ± 0. 5Pa?s;

Solid content: (30～33) %;

180° peel strength: ≥1000g/2.5cm (10cm/min).

Use should be based on purpose and performance parameters for a reasonable choice.

3. Peeling layer

Applying silicone oil on the surface of paper or film substrate to prevent the adhesive from sticking to the peeling layer substrate, and at the same time guaranteeing a certain adhesiveness between the surface printing layer and the peeling substrate layer for printing and Die cutting and so on.

The base material of the release layer includes two types, a paper base material and a film base material.

1 paper substrate. There are two types of paper substrates, translucent paper and polykraft paper. Most of them are translucent paper type, and the polykraft paper is used only as a base paper such as a sealing tape.

2 film substrate. This substrate is a high-grade substrate with good dimensional stability and light resistance, mainly polyester film type and polypropylene film type. This type of substrate is limited to high-end products because of its high price.

The above-mentioned various surface printing layers, peeling layers and adhesive layers can be combined in various ways to produce adhesive printing materials with different properties and different specifications. Users can make reasonable selections according to product requirements.

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