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The basic composition of stickers printing materials. It is mainly composed of surface printing layer, adhesive layer and peeling layer. Self-adhesive materials, also known as self-adhesive materials, pressure-sensitive materials or sticky notes, are the basic materials for label printing, mainly used for packaging and decoration printing. Adhesive materials can be divided into self-adhesive printing materials, decorative materials, sealing materials and special materials according to their different uses. Here mainly introduces self-adhesive printing materials.
The following surface printing layer, peeling layer and adhesive layer can be combined in various ways to make stickers printing materials with different properties and different specifications, and users can make reasonable selections according to product requirements.
Peeling layer
It is made by coating silicone oil on the surface of the paper base or film substrate to prevent the adhesive from sticking to the peeling layer substrate, while also ensuring that the surface printing layer has a certain viscosity between the peeling substrate layer, which is convenient for printing and Die cutting, etc.
There are two types of substrates for the release layer: paper substrates and film substrates.
â‘ Paper substrate. There are two types of paper substrates: translucent paper type and multi-layer kraft paper type. Most of them use translucent paper type. The multi-layer kraft paper type is only used as base paper such as sealing strip.
â‘¡Film base material. This substrate is a high-grade substrate with good dimensional stability and light resistance, mainly polyester film type and polypropylene film type. Because of its high price, this substrate is limited to labels for high-end products.
2. Adhesive layer
The adhesive layer is closely related to the performance and application scope of the sticker printing material, and is one of the important performance indexes of the sticker printing material.
There are three types of adhesives: rubber type, resin type and mixed type.
The main performance indicators of the adhesive are as follows:
Coating thickness: 0.02 ± 0.005mm;
Viscosity (25 ℃): 6 ± 0.5 Pa? S;
Solid content: (30 ～ 33)%;
180 ° peel strength: ≥1000g / 2.5 cm (10cm / min).
Reasonable selection should be based on the use and performance parameters during use.
3. Surface printing layer
The materials used for the surface printing layer are generally the following two, namely the paper-based printing layer and the film printing layer.
(1) Paper-based printing layer. The paper-based printing layer currently uses a lot of offset paper, coated paper, bright and fluorescent paper of various colors, aluminum foil and other special paper. The requirements for the paper-based printed layer should meet the relevant national standards.
(2) Film printing layer. The film printing layer includes the following types.
â‘ Transparent film. Transparent films are divided into composite films and printing films.
Composite film. There are mainly polypropylene film (PP), polyethylene film (PE) and polyvinyl chloride film (PVC). Film for printing. Mainly include polyester film (PET), polyethylene film (PE) and polyvinyl chloride film (PVC).
â‘¡Translucent film. Including polyester film (PET) and polyethylene film (PE).
â‘¢ Opaque film. There are mainly golden polyester film and silver polyester film.
â‘£Color film. Polyvinyl chloride film is generally used.
⑤ Special film.
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Shandong Tianzige International Trade Co., Ltd , https://www.chinesedipers.com