On self-adhesive printing 0

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Talking about self-adhesive printing

with the continuous improvement of people's living standards and the continuous expansion of the packaging market, the market share of trademarks, stickers, signs and nameplates is increasing, which brings infinite business opportunities for self-adhesive printing

overview of self-adhesive printing

the so-called self-adhesive printing is the process of transferring substances such as ink through the printing plate to the surface of the substrate pre coated with adhesive layer on the back under a certain pressure. Compared with ordinary printing, self-adhesive printing has the following characteristics:

1 Small investment and quick effect

self adhesive printing materials are mostly trademarks and stickers, which have a small format. Only one trademark printing machine can complete all processes such as multi-color printing, film coating, online die cutting, automatic waste discharge, hot stamping, etc., and the printing speed is fast with less waste products. One machine for one person, less investment

2. Flexible printing methods

self adhesive printing is not limited by printing methods. Traditional printing plants can use offset printing machine or silk printing machine for printing, and new printing plants can use flexographic printing machine or trademark printing machine for printing

3. Multi function, wide market demand

self adhesive printing can be used not only as trademarks and bar codes of food and cosmetics, but also as signs and inscriptions in special environments such as electronic products and mechanical products

two self-adhesive label materials

1 The operation of self-adhesive label plastic granulator covers a wide range of fields, including the structure and main performance parameters of label materials

(1) the structure of self-adhesive label materials

how does the universal testing machine unpack? Self adhesive label materials should focus on the following new material products: high-performance fibers and composites, graphene and its modified materials, industrial glass, industrial ceramics, artificial crystals, mineral functional materials The structure of new green building materials is mainly divided into three layers: backing, adhesive and release liner

base paper refers to the surface printing layer, such as coated paper, pet, PVC, synthetic paper, molded brown paper, aluminum foil paper, etc

release paper, also known as adhesive release paper, has an oily surface, is not sticky, is easy to peel, and has the function of protecting the adhesive layer

(2) main performance parameters

the performance parameters of self-adhesive label materials mainly include the following

① base paper thickness or gram weight, that is, the thickness of the surface printing layer or the weight of the surface printing layer per square meter

② 180 ° peel adhesion of adhesive layer, in kg/25mm

③ retention

④ peeling force, in g/25mm

⑤ tensile strength, in kg/25mm

⑥ elongation

⑦ temperature resistance, solvent resistance, cold resistance, water resistance, weather resistance and fire resistance

⑧ deformation

⑨ reattachment

⑩ inventory conditions and inventory validity

2. How to choose self-adhesive materials

self-adhesive is widely used and there are many kinds of materials. Therefore, it is necessary to select appropriate materials according to the needs of customers before printing, which can be considered from the following aspects

(1) what kind of material surface to stick to. If the material surface is a low-energy surface (such as plastic, glass, iron sheet, etc.), materials with good viscosity should be selected; If the material surface is a high-energy surface (such as pet, PVC, etc.), materials with general viscosity should be selected

(2) smoothness of the attached surface. If the surface to be pasted is curved or embossed, cloth and other rough surfaces, materials with good viscosity should be selected; If the surface to be pasted is a smooth surface, ordinary viscous materials can be selected

(3) stick to time. For example, materials with good viscosity can be selected for permanent adhesion; Materials with poor viscosity can be selected for temporary sticking; Materials with good re adhesion can be used for re stripping

(4) close to the environment. When used in the environment with large temperature difference, materials with good weather resistance should be selected; For applications in environments that are often exposed to water or oil, materials with good water resistance or solvent resistance should be selected; For application in high or low temperature environment, materials with good flammability or cold resistance shall be selected

(5) transparency requirements

3. Common self-adhesive materials and their characteristics

(1) coated paper: with excellent printing reproducibility and low cost, it is commonly used for large quantities of bottle and can labels and outer box labels

(2) PVC material: it has good waterproof performance and is not easy to tear. It is commonly used as the outer packaging trademark of shower gel, shampoo and other products

(3) xiaoyinlong: thick texture, metal appearance, good oil resistance and antifouling performance. It is mostly used for certification trademarks of electronic products and machines, and identification labels of instruments

(4) plain aluminum foil: high temperature resistance, ductility is expected to be fully produced in the third quarter of 2017; The 20000 ton lithium hydroxide project is good. It can be used with steel seal or type seal. It is mostly used for labeling boilers and mechanical heating parts

(5) fluorescent paper: good color saturation, with the characteristics of luminous visibility, which is mostly used for night vision label stickers

(6) fragile paper: facial paper is fragile and easy to tear, which can be used as fake trademark paper

(7) stencil paper: the surface is rough and non reflective, so the handwriting is easy to identify, which is suitable for the identification or warning label of electronic products

three adhesive printing methods

adhesive printing has a wide adaptability to printing methods. Theoretically, the four printing methods of flat, concave, convex and hole can be used, but the self-adhesive printing is mostly trademark stickers. Different choices should be made according to its characteristics of small format, small batch, simple printing content and complex post-processing

1. Offset printing

offset printing is suitable for businesses with fine printing patterns (more than 175 lines/inch), high registration requirements, large batches (more than one million prints), and low post-processing requirements, so it is the preferred printing method for non adhesive printing. However, traditional printing enterprises can not only give consideration to production, but also create considerable benefits according to their existing production equipment

2. Printing

small printing investment, thick printing ink layer, bright and lasting imprinting, and a wide range of printing materials. It is most suitable for the printing of PC and PVC nameplate self-adhesive products, but it is not suitable for self-adhesive products with a high number of printing lines and a little overprint

3. Letterpress printing

letterpress printing has small investment, moderate printing quality and printing speed. General trademark printing machines can realize the production line of printing film laminating serial number die cutting automatic waste discharge, which is convenient and practical, and is the first choice for self-adhesive label printing

4. Gravure printing

gravure printing is not very suitable for self-adhesive label printing because of its high plate making cost

5. Flexographic printing

the flexographic printing production line has strong online processing ability and good printing quality, especially the use of ink, which has environmental advantages. However, flexographic printing production lines have large investment and are generally only suitable for mass printing

with the increasing diversification and popularization of electronic products and household appliances, self-adhesive products will be used more widely; And with the synthesis of new materials and the realization of new processes, the scope of self-adhesive printing will continue to expand. In a word, self-adhesive printing will develop rapidly as a marvel in the printing family

source: keyin media printing technology

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