labels such as outer box label paper, manufacturing enterprises and logistics, and self-adhesive labels such as medical test tubes and cups.

1. Waterborne coating adhesive

Waterborne coating adhesive is made by emulsifying acrylic acid or polyurethane resin with water as solvent through special emulsifying equipment. The biggest advantages are: variety, environmental protection and low price. Now many coatings are made of water-soluble adhesives, such as general water-soluble PA and water-soluble PU, as well as functional size such as leather film adhesive, oil-wax-sensitive size and scratch-off size. Water solubility will be the direction of coating in the future because of its functionality, environmental protection and low price. Disadvantages are poor film forming, poor washing fastness, and PU can't be attached with hot air adhesive. Generally used for medical test tubes, cups and other self-adhesive labels, which are easy to peel off in the later stage.

2. Hot glue

Hot glue is a kind of plastic adhesive. In a certain temperature range, its physical state changes with the change of temperature, while its chemical characteristics remain unchanged. It is non-toxic and tasteless, and belongs to environmental protection chemical products. Hot-melt adhesive bonding is to melt hot-melt adhesive by heat with a hot-melt adhesive machine. The melted adhesive becomes a liquid, which is delivered to the surface of the object to be bonded through the hot-melt adhesive tube and hot melt glue gun of the hot-melt adhesive machine. After the hot-melt adhesive is cooled, the bonding is completed. In order to give full play to the advantages of hot melt adhesive, we must use high-quality hot melt adhesive and the corresponding hot melt adhesive machine with reliable quality and performance to match it. Generally used for labels such as outer box label paper, production enterprises and logistics.

characteristics of self-adhesive

1. Low investment and quick effect

Self-adhesive prints are mostly trademarks and stickers, with small format, fast printing speed and less production waste.

2. Flexible printing method

Self-adhesive is not limited by printing method, and traditional printing plants can use offset printing machine or screen printing machine for printing.

3. Multi-function

Self-adhesive is widely used in food, cosmetics and bar codes, and can also be used as signs in special environments such as electronic products and mechanical products.

what are the above references? Baidu encyclopedia-stickers