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The emergence of hot melt adhesive book binding, development and application - hot melt adhesive, b by qmqm wang
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The emergence of hot melt adhesive book binding, development and application - hot melt adhesive, b by QMQM WANG
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| Article Posted: 06/30/2010 |
| Article Views: 63 |
| Articles Written: 809 - MORE ARTICLES FROM THIS AUTHOR |
| Word Count: 707 |
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The emergence of hot melt adhesive book binding, development and application - hot melt adhesive, b |
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Business,Business News,Business Opportunities
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In 1989, PUR adhesive binding on trial first in North America, when PUR is only for general paperback binding. Now, the first use of PUR hot melt adhesive Print Zhuangding Chang found that PUR in hardcover books, annual reports, catalogs, magazines, Yellow Pages, and high value applications.
Today, PUR has spread rapidly in North America application. In 1995, it was reported that only 28 factories in North America using the PUR. The end of 2002, this figure increased to 50. PUR hot melt with the commonly used (EVA hot melt adhesive, PVA latex) has many advantages compared to the most important point is that the adhesion strength PUR, books open after the appearance of smooth, easy to read.
What is PUR PUR is of a urethane bond (NH-CO-O) of the polymer, the molecular mixing of the end of the base is the isocyanate. The basic composition of PUR with active hydrogen end of the polyol (polyester, polyether, etc.) and low molecular weight diols (Lian elongation agent) and the addition of isocyanate polymers. Binary alcohol and isocyanate reaction to form rigid molecular refining segment, while the polyol and isocyanate reaction to form flexible molecular refining segment, so both of the PUR hot melt adhesive is a rigid-flexible. In addition, isocyanate encounter moisture to the air base will have irreversible crosslinking reaction to form a solid adhesive layer, which is characterized by PUR hot melt.
PUR the background With the diversity of printing products and printing industry using a variety of different weight printing paper, Plastic Film, Varnish And ink, the latest PUR adhesive bonding of these materials when applied, would not exist very difficult. PUR hot melt adhesive to firmly put Paint Adhesive paper, adhesive strength of its 40-60% higher than traditional adhesives. Installed in ordinary glue, the paper's printing ink will be moved to the spine, PUR hot melt adhesive will not have such problems.
PUR is unique in its ability to bonding various materials, including varnish coating, UV curing layer, plastic film and paper coating.
PUR development process Although the first generation of PUR hot melt adhesives can achieve linkage of production, book binding, but is required after 24 hours to achieve maximum bonding strength, this time to stand up to the transport of the external force.
Second generation introduced in 1994 and PUR hot melt adhesives to achieve the linkage cutting. If the paper has some moisture, binding to maintain a high humidity area, gluing, after 4 hours get enough of the adhesion strength. Nevertheless, the second generation of PUR also shortcomings: in the cold winter, the air relative humidity dropped to 20%, PUR adhesive crosslinking fixation is a problem.
Third generation PUR just one hour fixation can be completely dry and only need to be able to complete the paper in water, crosslinking wet, books can be plastic offline. However, the improvement of the third generation of PUR hot melt adhesives have also had a negative impact, because PUR can be achieved in a relatively short time the initial adhesion strength, so a number of manufacturers found in the course of PUR glue pot quickly become stuck in, especially in humid areas and that the main binding manufacturers of thin books more obvious, because the thin books bound in the coating when the device in the PUR to stay a long time. The fourth generation is already available
PUR, PUR hot melt than the third generation mobile and better, you can achieve the desired initial adhesive strength, while extending the PUR in the glue pot of a stay. The fourth generation of PUR has replaced most of the second and third generation of PUR products, especially in the use of the new nozzle system more successful. Meanwhile, the fourth generation of PUR hot melt adhesive bound books, the day can be shipped to other places. As fast drying fixation, thereby increasing the productivity of books at the same time also increased production flexibility. I am an expert from China Manufacturers, usually analyzes all kind of industries situation, such as sewing machine extension , diy hair extensions.
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