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 adhesives are used through a dedicated melter to seal the seals of the tank and avoid contact with the air. Second, a container handling device is needed to transfer the PUR adhesive to the glue pan; Equipment such as sizing and drying must also be fully enclosed; in addition, the temperature control during the entire operation process is strict and the operating temperature must be optimized before PUR adhesives can function. Therefore, the entire sizing equipment is very different from other sizing equipment such as EVA hot melt adhesive. Only with a good knowledge of the characteristics and characteristics of PUR adhesive adhesive can we provide corresponding technical support and accurately adapt the sizing equipment. The sizing equipment is still blank in the country.
Cost problems
Another problem that has caused headaches for manufacturers is the high cost of PUR adhesives. The first is that the products themselves are expensive. Compared with EVA hot melt adhesives, the price of 1 ton of EVA hot-melt adhesives is about 1 million, and PUR adhesives The price of adhesives is approximately 140,000 yuan/ton in foreign countries, and domestic Henkel companies are expected to sell 50,000 yuan/ton. It is reported that the price of PUR adhesive produced by a company in Beijing can be as low as 30,000 yuan per ton. Even at the lowest price, PUR adhesives are several times more expensive than EVA hot melt adhesives. In addition, there is still a need for funds to transform the equipment.
Therefore, the use of PUR adhesives requires a significant additional cost. It is only more cost-effective to use PUR adhesives in large quantities.
After treatment
Because the PUR adhesive is air-cured, it may clog the nozzle during the sizing process, especially in the nozzle-type sizing operation. Therefore, how to effectively clean the nozzle is also a troublesome task.
Long curing time
After 2 hours of curing, PUR adhesive can reach the pull value that can be cut, so it cannot be cut immediately after sizing, otherwise it may affect the appearance quality of the books.
The role of the government can not be ignored
Only by solving the above problems, PUR adhesives can be greatly developed in Chinese bookbinding. However, at the same time, we have seen that solving these problematic ideas is not just achieved through the efforts of one or a few manufacturers. It requires the co-operation of enterprises and government agencies. However, the consciousness of the executives who have remained in the old economic system has affected the development of PUR adhesives in China. The sense of chief executives has made the competent department of the industry not act in accordance with market laws and lack of awareness of service for the enterprise, which has led to a very unclear channel for companies to understand PUR. During a random interview with some adhesive manufacturers and printing companies, the reporter found that a considerable number of them had very little knowledge of PUR adhesives and suffered from the lack of successful domestic PUR adhesives. Obviously, adhesives take a wait-and-see attitude is also unacceptable. Therefore, if the perfect technology and vision are constrained by the sense of chief executive, they will all become beautiful pictures on the wall.
The forces promoted by the government should not be ignored. Only as soon as possible should be in line with international standards, accelerate the phase-out of old technologies, build up PUR adhesives, and allow more enterprises to show their prominence on this stage; and increase the publicity of PUR adhesives. , to allow more people who have nothing to do with PUR adhesives or to stand at the door of PUR adhesives, to have the opportunity to join China's PUR adhesives for the book binding industry.
When interviewing Wang Huaizhu, her words made reporters deeply remembered: Only by abandoning the sense of the government's chief executive, PUR adhesives may have a day in the book binding.
Obviously, PUR Adhesives, in order to achieve large-scale application promotion in book binding, must first have an executive-level awareness.
