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YINYAN:Introduction of water-based, hot-melt environment-friendly adhesive

Large Middle Small Source:Yinyan View:- Date:2019-04-22 16:13:31

Wuxi YINYAN is professional in offering customized mixing solutions in adhesive industry. YINYAN offers multi-functional mixer, dual planetary mixer, extrusion machine, high viscosity filling machine, etc. Here, we mainly introduce water-based adhesives, hot-melt adhesives.
Environment-friendly adhesives refer to adhesives without organic solvents or with low content of organic adhesives. In terms of environmental protection, it refers to the adhesive that is friendly to consumers, processors, environment and resources and meets the three requirements of "environmental protection, health and safety". In the sense of environmental protection, environmental protection adhesives are divided into: water-based type, hot-melt type, solventless type, uv curing type, high solid content type, biodegradable type.
 Water-based adhesives
1 Brief introduction
The adhesives, of which water as a dispersive medium, is a major category of environmental protection type adhesives. Solvent - based adhesive is a homogeneous system with benzene, toluene and other organic solvents as dispersing medium and the phases are continuous. Water - based adhesive is a heterogeneous system with water as dispersion medium.
2 Classification
With water as the dispersive medium, the adhesive can be divided into water-soluble adhesive, water-dispersed adhesive and water-emulsion adhesive.
According to the source of raw materials, water-based adhesives are mainly divided into water-based polyurethane adhesives, water-based polyacrylate adhesives, water-based epoxy adhesives, water-based silicone adhesives, polyvinyl acetate emulsion adhesives, chloroprene latex, etc.
Water-based adhesives mainly include phenolic, urea-formaldehyde, melamine-formaldehyde, polyvinyl acetate emulsion, EVA emulsion, polyacrylate emulsion, waterborne polyurethane, and water-based epoxy adhesive which is in the initial stage in China.
3 Advantages and disadvantages
Water-based adhesive is one of the developing trends of adhesive. Compared with solvent - based adhesives, it has the advantages of no solvent release, low cost, non - combustible, safe use and so on, meeting environmental requirements. The solid content is relatively high, up to 50% ~ 60%. But because of the slower evaporation of water, the glue curing slow and may need heating drying equipment.
Many foreign government departments have issued laws to restrict the use of volatile organic compounds (VOCs). The change of adhesive from solvent to water-based type has become inevitable, domestic and foreign research and development is vigorously.
4 Main Manufacturer
Dow, Bayer, Comens Material, Shanghai Xinguang Chemical Co., Ltd., Hansi, 3 Trees, Anhui Andahuatai New material Co., Ltd.
Hot-melt adhesive
1 Brief introduction
Hot-melt adhesive usually refers to the polymer adhesive that is solid state at the room temperature, liquid state by heating, and after pressure, cooling, can complete the bonding with something that is coated and wet in seconds. It is composed of polymer matrix, adhesives, waxes, antioxidants, plasticizers and fillers, etc. It contains no solvent, 100% solid content, non-toxic, odorless, known as "green adhesive".
2 Classification
According to chemical composition, it can be divided into EVA, polyamide, polyester, SBS, SIS, polyurethane.
According to type, it can be divided into reactive hot melt adhesive, water dispersing hot melt adhesive, biodegradable hot melt adhesive, hot melt pressure-sensitive adhesive.
3 Advantages
 (1) Quick adhesion, easy continuity, high - speed automation and low cost.
 (2) No solvent pollution, no combustion.
 (3) No drying process is required, and the bonding process is simple
 (4) The product is solid type, easy to pack, transport, storage, with small area.
 (5) Good adhesion strength and flexibility.
 (6) Wide range of adhesive objects, namely bonding and sealing
 (7) Good gloss, good shielding.
4 Disadvantages
 (1) There are performance limitations: Heat resistance is not enough, bonding strength is not high, drug resistance is not good.
 (2) Need to be equipped with special hot melt equipment to construction, such as hot melt glue machine, hot melt glue gun
 (3) The adhesion will be affected by the climate and season.
5 Main Manufacturer
Henkel, H.B.Fuller, Bostik, Forbo, 3M, Hitachi Chemical, Shanghai KangDa New Materials Co., Ltd., ChemChina, Dongguan Jiaozhibao Hot-melt Adhesive Co., Ltd., Coating P. Materials, Hansi, JCC, Wuxi Wanli Adhesion Materials Stock Co., Ltd. , Jaour Hot Melt Adhesive, Energy Spread New Material, CO-MO Adhesives, TEX YEAR Group, Laien Technology (Wuxi) Co.,Ltd.