Adhesive refers to a natural or synthetic, organic or inorganic substance that can connect two or more parts or materials through the adhesion and cohesion of the interface. In the fields of printing , biomedicine and other fields, there is a broad application market. Because the traditional adhesive contains free TDI, it has hidden dangers such as solvent residue, flammable and explosive, and VOC emissions. Therefore, the development of water-based, solidified, solvent-free and low-toxic environmentally friendly adhesives has become the development direction of adhesives. Types and characteristics of environmentally friendly adhesives (1) Water-based adhesives. The adhesive which uses water as a dispersion medium is divided into a water-soluble adhesive, a water-dispersible adhesive and a water-based adhesive, and is a large class of environmentally-friendly adhesives. (2) Solvent-free adhesive. Such adhesives are solvent-free and do not cause pollution. Of course, there should be no release of harmful small molecules during use. At present, the adhesive is mainly hot melt adhesive, which has no pollution, rapid curing and wide bonding surface, and is suitable for continuous production, and is convenient for storage and transportation. (3) Natural rubber and modified natural rubber. This is the earliest adhesive used by humans. Such rubber materials are easy to obtain, simple in production process, convenient to use, generally water-soluble, and mostly non-toxic. (4) Inorganic adhesives. Inorganic adhesives are a wide range of adhesives composed of inorganic salts, inorganic acids, inorganic bases and metal oxides. The advantages of inorganic adhesives are: easy to use and can be cured at room temperature. The disadvantage is that it is brittle and not resistant to impact, and the aging resistance is not strong enough. There are many kinds of inorganic adhesives, which are classified into air-dry type, water-solid type, hot-melt type and reaction type according to curing conditions. (This article is organized by the Printing Technology Magazine) No.10 Blister Packing Staples,Metal Silver 26/6 Blister Packing Staples,Stainless Steel 26/6 Blister Packing Staples,Top Selling 26/6 Blister Packing Staples SHAOXING YIYOU STATIONERY CO.,LTD , https://www.yiyou-staple.com
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