What are the types of self adhesives? Features of self adhesive

Water glue is a general term for glue with water as the solvent or dispersion medium, as opposed to the usual solvent-based glue (that is, glue with organic solvent as solvent or dispersion medium). It is liquid at room temperature, and is divided into two types: single-component and multi-component. After curing, it is generally irreversible.

For one-component adhesives, some only after the water volatilizes, the adhesive solidifies to form a bond, which is a physical process; With the volatilization of water, the active groups in the adhesive molecule react to form bonds, and chemical and physical processes coexist. In the case of two-component glues, curing is predominantly chemical, accompanied by physical processes. Water glue is mainly used for surface bonding, with good bonding strength, can be cured at room temperature or medium temperature, and has the characteristics of small curing shrinkage, yellowing resistance, colorless and transparent, etc., which is an environmentally friendly chemical.

It is suitable for small and medium-sized manual and equipment processes. <>

Hot melt adhesive is a kind of plastic adhesive, its physical state changes with temperature within a certain temperature range, and the chemical properties remain unchanged, it is non-toxic and tasteless, and is an environmentally friendly chemical product. Because the product itself is solid, it is easy to package, transport, store, solvent-free, non-polluting and non-toxic; As well as the advantages of simple production process, high added value, high adhesive strength and fast speed, it is favored. EVA hot melt adhesive is a solvent-free, 100% water-free solid fusible polymer; It is solid at room temperature, heated and melted to a certain temperature to become a liquid that can flow and has a certain viscosity.

The molten EVA hot melt adhesive is light brown or white in color. EVA hot melt adhesives consist of basic resins, tackifiers, viscosity modifiers, and antioxidants. <>

The so-called self-adhesive printing is the process of transferring ink and other substances to the surface of the substrate pre-coated with adhesive layer on the back under a certain pressure. Compared with ordinary printing, self-adhesive has the following characteristics: small investment and quick effect.

Self-adhesive prints are mostly trademarks and stickers, which have a smaller format, fast printing speed and less production waste. Flexible printing methods. Self-adhesive is not limited by the printing method, and traditional printing houses can use offset printing machines or screen printing machines.

Multi-functional, self-adhesive is widely used in food, cosmetics and barcodes, etc., and can also be used as electronic products, mechanical products and other special environment signs.

Self-adhesive sticker refers to a composite material printed with paper, film or other special materials as fabrics, adhesive on the back, and silicone-coated protective paper as the backing paper.

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

1. Wide range of applications

It is not only used in food and beverage, daily necessities, household appliances, stationery, etc., but also in the field of commodity circulation, clothing, textiles, medicine, cosmetics, etc.

2. Easy to paste

There is no need for adhesives such as glue and paste, and it is very convenient to peel off and paste, and there is no pollution to the appearance of the product.

3. It is durable

Firm adhesion, flexible adhesion, heat and moisture resistance, not easy to age.

4. Small investment and quick results

Self-adhesive prints are mostly trademarks and stickers, their format is small, only one trademark printing machine can complete multi-color printing, lamination, online die-cutting, automatic waste discharge, hot stamping and other processes, and the printing speed is fast, less waste. One machine per person, low investment.

There are 6 common materials in the market:

1.Thermal self-adhesive label paper.

Thermal self-adhesive label paper is made of thermal paper after processing, which can be printed directly with a thermal printer, which is convenient and fast to use, and has a wide range of applications.

2.Coated self-adhesive label paper.

Coated self-adhesive label paper is a multi-color product label paper, which needs to be printed with ribbon, and has a wide range of applications.

3.Thermal synthetic label paper.

It is also a label paper made of thermal label paper processed and synthesized, which has the function of "not tearing", and can be printed with a thermal printer or ribbon.

4.Write self-adhesive label paper.

Multi-purpose label paper, used for information labels, barcode printing labels, especially suitable for high-speed laser printing, but also suitable for inkjet printing.

5.Water-soluble self-adhesive label paper.

As the name suggests, paper dissolves in water, and glue and tissue paper are made of starch.

6.Label paper can be removed.

Within the specified time, you can peel it off and paste it again.

Coated paper stickers, also known as mirror stickers, kraft paper stickers, writing stickers, etc., these are the most commonly used and common in the market.

The self-adhesive material is composed of three parts: surface raw materials, adhesives, and liners. It can be matched or customized according to specific use needs.

Facial paper: According to the material, it is divided into coated paper, PET PVC, etc., and the back of the facial paper is coated with adhesive; Adhesive: The types are permanent adhesive (strong adhesive) type, removable (weak adhesive) type, and readhesive type liner paper

Ordinary liner and glassine liner are coated with a silicone oil layer on the surface, which has a barrier effect on the adhesive.

According to the surface material raw materials, it is divided into paper and film;

1.Paper is divided into: coated paper, glass cardboard, laser paper, kraft paper, fluorescent paper, gold-plated paper, aluminum foil paper, fragile (anti-counterfeiting) paper, silver-plated paper, masking paper, cloth label (Tavik nylon) paper, pearlescent paper, sandwich coated paper, variable information paper.

2.Membranes are divided into: transparent PET translucent PET transparent OPP translucent OPP transparent PVC glossy white PVC matte white PVC synthetic paper glossy gold (silver) polyester matte gold (silver) polyester.

According to the performance of adhesives, they can be divided into two categories:

Permanent adhesives and removable adhesives. According to the needs of use, it can also be divided into general adhesive, adhesive, strong adhesive and special adhesive.

According to the bottom paper, it can be divided into:

White Glassine Paper, Blue Glassine Paper, Yellow Glassine Paper, Kraft Paper, Polyester PET, etc.

Self-adhesive materials can be divided into paper and film according to the surface material.

The commonly used materials of paper are coated paper, thermal paper, writing paper, embossed paper, fragile paper, special light paper, etc., all of which have a common feature that they are easy to tear.

Membranes generally include PET self-adhesive materials, PVC self-adhesive materials, PE self-adhesive materials, BOPP self-adhesive materials, etc. In this category there is a synthetic paper, which also belongs to the film category. The color of the film material will be relatively rich, including matte silver, bright silver, transparent, bright white, sub-white, sub-black, bright black, etc.

The characteristic of the membrane is that it cannot be torn.

Each surface material can be matched with different glues and liners according to the application and the different objects to be pasted.

There are five categories.

According to the adhesive characteristics, it can be divided into permanent self-adhesive materials and removable self-adhesive materials;

According to the classification of adhesive coating technology, it can be divided into hot-melt self-adhesive materials, solvent-based self-adhesive materials and emulsion self-adhesive materials;

According to the adhesive and chemical properties, it is divided into two types of self-adhesive materials: rubber-based and acrylic;

According to the characteristics of the bottom paper, it is divided into three kinds of self-adhesive materials: opaque bottom paper, translucent bottom paper and transparent bottom paper;

According to the characteristics of the surface material, it is divided into paper self-adhesive materials, film self-adhesive materials and special self-adhesive materials.

There are transparent, translucent, and opaque. However, transparency does account for a large proportion.

There are also many kinds of materials, mainly films, PET transparent self-adhesive materials, OPP self-adhesive transparent materials, PVC transparent films, PE films, etc., PP can also be used.