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2023.04.11
Categories and Characteristics of Waterborne Polyurethane Adhesive
With the progress of science and technology and the increasingly strict requirements of environmental protection laws and regulations, the research and development of environmentally friendly adhesives has been paid more and more attention. Mainly includes waterborne polyurethane adhesive and solvent-free adhesive. Solvent-free glue is generally called hot melt glue. It is composed of thermoplastic resin and does not contain any moisture and solvent. It can flow in the molten state and has adhesive properties after cooling. It can be easily automated. The production process provides high productivity without any Environmental pollution, harmless to humans. In addition, there are emulsion/dispersion adhesives, reactive adhesives and natural polymer adhesives.
2023.04.03
What are the performance characteristics of waterborne polyurethane adhesive?
The research of waterborne polyurethane adhesive began in the 1950 s, and it was in the 60 s and 70 s that people really paid attention to. However, the adhesive strength of waterborne polyurethane adhesive at that time was not high, and it was mostly used for packaging adhesive and some occasions with low adhesive strength. In the mid-1970s, water-based polyurethane adhesives used for bonding soles began to appear. Due to poor performance and lack of strict environmental protection regulations, by the end of the 1980 s, they were basically still in the experimental stage. In the early 1990 s, environmental regulations in Europe and the United States became increasingly stringent, and the VOC content of shoe factories began to be controlled.
2023.03.23
Characteristics of waterborne polyurethane adhesive
Aqueous polyurethane adhesive refers to the adhesive formed by dissolving or dispersing polyurethane in water. In practical applications, most waterborne polyurethanes are polyurethane emulsions or dispersions, and less aqueous solutions.
2023.03.13
PUR hot melt adhesive ordering is less expensive than lock wire ordering.
Books bound by PUR hot melt adhesive have strong vitality to the surrounding environment, especially heat and low temperature resistance. We tested this through experiments. First simulate the temperature adaptability that the glued book will face in winter. The two books bound by PUR glue and EVA glue are put into the refrigerator at the same time. The set temperature is -20 degrees and the placing period is 12 hours. After 12 hours, the two books are removed from the refrigerator. The opened pages are compared. The book bound by EVA hot melt glue will produce brittle cracking sound. The book stickers have been opened and the pages are dropped, while the book bound by PUR glue is still intact.
2023.02.27
How to better use PUR hot melt adhesive?
PUR hot melt adhesive (PolyurethaneReactive) is a new type of one-component, additive-free hot melt weathering adhesive. It is cured by moisture in the air and has excellent bonding strength and impact resistance after thorough curing. At the same time, it has excellent bonding compressive strength, heat resistance, solvent corrosion resistance and temperature resistance. In recent years, it has become a relatively good bonding adhesive for electronic products and electronic industry.
2023.02.10
Application of PUR hot melt adhesive
In recent years, with the overall improvement of the technical strength of packaging and printing, prepress design, packaging and printing, and post-press technology are all developing in a higher, faster and more precise direction. Nowadays, there are many binding adhesives to choose from, such as PUR hot melt adhesive, butadiene acetate) hot melt adhesive, PVA refrigeration solvent, etc. Let's first understand PUR hot melt adhesive.
