GUANGZHOU INTERNET WOOD GLUE MANUFACTURER CO. LTD.
What is PUR Adhesive? PUR adhesive is a polymer compound with a urethane bond (NH-CO-O). It is a rigid and soft hot melt adhesive with a large melting point and cold-resistance span. The melting point can reach 180°C. -40°C. PUR Adhesives have many advantages: they cure when exposed to air, and cannot be re-melted like EVA hot melt adhesives. This feature determines the strength of PUR adhesives and their strong bonding; the amount of PUR adhesives used Very provincial, the equivalent book, the...
In the binding binding industry, EVA hot-melt adhesives (hereinafter referred to as EVA) have been used more frequently. According to productivity, quality stability, cost, etc., its demand has increased. However, in order to meet various quality requirements, from a practical perspective, intact products are neither easy nor realistic. However, in recent years, as an alternative to EVA adhesives, we have developed polyurethane reactive hot-melt adhesives (PURs). Due to its superior...
Technical suspense Whether the rapid development of PUR adhesives in China can become a reality, there are still some problems behind them, and the first problems are technical problems. Regarding PUR adhesives, the main technical obstacle lies in the technical transformation of PUR adhesive sizing equipment. Since PUR adhesives are moisture cured products, it is necessary to isolate the glue, maintain absolute dryness, and transport and apply glue. Be very careful with the process. First, PUR...
Fifth, preheating of hot melt adhesive Hot melt should be warmed up before use. Preheat the solid hot melt glue into the preheated glue pot, heat the temperature around 160°C～200°C, preheat for 1～2 hours, wait until the heating temperature and have good fluidity, and then Put the preheated hot melt adhesive into the plastic tank with the green machine at 160°C～180°C, before it can be used normally. The heating temperature of the hot melt adhesive is closely related to the fluidity and adhesive...
Hot stamping materials refer to the materials used in the press, fabrics, leather, coated surfaces, plastics and other cover materials, and are hot stamped and pressed on various graphic materials, including various hot stamping adhesion promoting materials. After melting adhesive materials by heating and pressing methods, various metal foils and the like are stamped on various articles to obtain ideal decorative processing methods, which have lasted for several centuries in China and are used...
Comparing the successful experience and development trend of the direct printing of corrugated cartons made by foreign water-based ink flexo printing, China's corrugated cartons will also develop from a single transport packaging function to a multifunctional and high-quality transportation and marketing packaging. The good news is that high-quality carton flexo printing technology featuring fine dot overprinting and color gradation printing has been developed under the cooperation of various...
The plastic coating structure is not a new invention, but the materials and technical methods to meet the specific needs of the packaging are also constantly innovating. So far, all coatings are passive, they can effectively protect the product from the internal and external environment, unless physically damaged, the physical damage from the pressure of carbon dioxide, or due to the pressure of gas emissions caused by the decline Short-term contraction. Here are a few new barrier coating...
The main emissions of VOCs in the printing industry include printing, drying, laminating and cleaning. The emissions of VOCs are closely related to printing consumables such as inks, adhesives, fountain solutions, car wash water, and thinners. Based on this, printing companies must make corresponding improvements in printing, drying, compounding and cleaning, and gradually achieve environmental protection. Green raw materials and Green printing process replacement method and organic solvent...
From the point of view of the process, similar to the lock-line paperback, this link is different only in the viscous setting. From the production efficiency point of view, the lock-thread flatpack is slightly improved. This kind of single-step processing, before and after the process of convergence of the process model in the production efficiency is difficult to have a new breakthrough, due to the semi-finished product in the process between the pile-up pauses and handling is inevitable, and...
The binding of early books is mostly line ordering, which is not only time-consuming and labor-intensive, but with the development of the adhesive industry, the binding has gradually replaced the line order and became the mainstream of book binding. Source: China Packaging Network Editor Glue Dots Hot-melt pressure-sensitive adhesives Early bookbinding is mostly line-setting, not only time-consuming and labor-intensive, but with the development of the adhesive industry, the adhesive-binding...
To prepare for the use of hot melt adhesives, you must purchase hot melt adhesives, which are specialized in melting hot melt adhesives and spraying liquid hot melt adhesive onto substrates. However, you may have questions about which hot melt adhesive can be melted in the melter machine. Will some hot melt adhesives not use the melter? There are many types of hot melt adhesives on the market, which are strip-shaped, generally called hot melt glue sticks, as well as block-shaped, granular, from...
Bookbinding uses glue-binding technology, which has been raised loudly since the 1970s. However, due to various reasons, the promotion of glue-binding technology in China has not only failed to achieve the expected goal, but the binding quality problem caused by glue-binding has become the main culprit in the quality problems of glue-book publications. According to the statistics of the National Press and Publication Administration's Quality Inspection Center, the quality problems in China's...
In the glue-binding production process using an automatic disk-type bookbinder, the hot-melt adhesive as a bonding material and the adhesive-bonded surface as a bonder are a contradictory unity. Mechanical high speed is not good, poor performance, use the best hot melt adhesive does not contain a good book; Similarly, the standard of hot melt adhesive can not reach, no matter how good the machine can not contain a good book. With the increase in the use of automatic disc machines, operators...
First, the solid hot melt adhesive must be heated to flow before application. Because the polymer used may decompose when heated continuously, the heating time and temperature must be controlled. On the one hand, the viscosity of the polymer hot melt increases with the increase of the molecular weight and the amount thereof, resulting in difficulties in coating; on the other hand, in order to generate high adhesive strength and toughness, it is necessary to use higher molecular weights and...
Because the affinity of the hot melt adhesive and different adhered materials is different, in order to make the hot melt adhesive play "stickiness" better, the following factors should be carefully considered in selecting the hot melt adhesive: First, color. Due to the different colors of the adhesive, the color requirements of hot melt adhesives should be different. If there is no special requirement for the color of the adhered object itself, yellow hot melt adhesive is recommended. In...
PUR (Polyurethane Reactive) Chinese name is called moisture curing reactive polyurethane hot melt adhesive. The main component is an isocyanate-terminated polyurethane prepolymer. PUR's adhesiveness and toughness (elasticity) can be adjusted, and it has excellent adhesive strength, temperature resistance, chemical resistance and aging resistance. Has become one of the important varieties of the adhesive industry. Is now widely used in packaging, wood processing, automotive, textile, mechanical...
The adhesive used in the adhesive bonding process of the adhesive to form a book is mainly a hot-melt adhesive agent, EVA hot melt adhesive material. The correctness of the use of hot melt adhesive is one of the key to ensure the quality of glue binding. To use hot melt adhesives correctly, first of all, the adaptability of hot melt adhesives should be studied and mastered. Hot melt adhesive characteristics Hot-melt adhesives, referred to as hot-melt adhesives, are solvent-free, fast-curing...
As a new type of carton and carton packaging sealing, hot melt adhesive sealing has partially replaced traditional strapping and tape packaging, carton packaging for various food products, and cartons for wine and dairy products. On the packaging. Due to the advantages of good package quality, beautiful appearance and low cost, the application of hot melt adhesive sealing will become more and more extensive. Hot melt adhesive sealing advantages Hot-melt adhesive sealing is the use of a hot melt...
Although the use of hot melt adhesives in medical packaging accounts for only a small proportion of the total market share of hot melt adhesives, the technical requirements for the period are very high, because if the adhesive fails, it may lead to endangering human health. Manufacturers have a unique set of requirements for medical packaging (including pharmaceuticals and medical devices), including reliable barriers that can withstand sterilization and sterilization, can prevent drugs from...
The large amount of EVA hot-melt adhesive used in bookbinding has been greatly increased due to its high production efficiency, stable quality, and moderate cost. However, it is practically impossible to practically use adhesive products that have many quality requirements at the same time. However, PUR (Poly Urethane Reactive Hot Melt Adhesives), an alternative to EVA, which was developed several years ago, is attracting attention because of its excellent characteristics and practical...
As a new type of carton and carton packaging sealing, hot melt adhesive sealing has partially replaced traditional strapping and tape packaging, carton packaging for various food products, and cartons for wine and dairy products. On the packaging. Due to the advantages of good package quality, beautiful appearance and low cost, the application of hot melt adhesive sealing will become more and more extensive. Hot melt adhesive sealing advantages Hot-melt adhesive sealing is the use of a hot melt...
3 PUR binding production conditions The adhesive strength of PUR cannot reach the specified strength at once after coating, and it cannot be judged that the effect is good or bad. Therefore, it is necessary to fully understand this feature and adjust the binding machine. In particular, it should be understood that when the pressure value of the coating roller is different from the standard value, the glue will not reach its maximum adhesion strength value, and the production should be conducted...
Hot melt adhesive is a solid at room temperature, heated to a certain temperature, then melted into a liquid, after coating, wetting the adherend, after the press, cooling, adhesive can be quickly completed adhesive. In most cases, the hot-melt adhesive is water-free or solvent-based and is a 100% solids adhesive. Because of its low pollution, high initial viscosity and quick stickiness, it is widely welcomed by the modern automation industry and has been widely used in books, such as wireless...
Hot-melt adhesives are commonly known as EVA (ethylene-vinyl acetate copolymers). The formulations vary slightly depending on the industry in which they are used. However, hot-melt adhesives for printing should also be differentiated according to different applications. 1. Should different types of glue be used for binding different papers? For example, binding plain paper or coated paper? Copperplate paper should be made of copper plate glue; the top-mounted glue pot wireless glue machine or...
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