Yu Shulin learned that Japan's printing industry has cut its output by 30% to 40% during this international financial crisis. It stressed that opportunities exist in the challenges. The Chinese and Japanese printing communities should strengthen cooperation and jointly cope with the crisis. He said that China and Asia have not paid much attention to the development of the world printing and publishing industry. At the Frankfurt Book Fair in October this year, we will use this as a clue to demonstrate the development of oriental culture and the progress of ideological progress. Demonstrate the contribution of China and Asia to the development of the world. And Hibiscus Hoshino agrees with this.
Regarding the issue of environmental protection in the printing industry that Japanese friends are concerned about, Lu Shulin said that the Chinese government attaches great importance to the issue of environmental protection and will adopt the following three measures to achieve green environmental protection in the printing industry: First, to promote pre-press digitization and digitization of publishing products through several national-level plans; It is the use of advanced technology to improve the current situation of high pollution and high energy consumption in all printing links. Third, the obsolete and outdated old equipment has been eliminated through mandatory measures, which has enabled the Chinese printing industry to achieve overall hardware upgrades.
Retired in April of this year and Maki Takashi engaged in printing business for more than 40 years. The business headquarters he led helped assist in the preparation of the China Printing Museum, the 7th World Printing Conference, the 3rd China International Printing Exhibition, and the organization of the National Offset Machine Skill Competition. And other activities, and set up a joint venture with Beiren Mitsubishi Beiren Printing Machinery Co., Ltd. According to reports, Japan’s Mitsubishi Heavy Industries Co., Ltd. has provided nearly a thousand sets of equipment to China in the past 30 years.
Chen Yingming, deputy director of the Foreign Affairs and Cooperation Department of the General Administration of Press and Publication, and related personnel from the Printing and Distribution Management Department attended the meeting.
Curing agents, also known as hardeners, are essential components of many polymer systems, including Epoxy Resins. Curing agents react with the epoxy resin to form a three-dimensional crosslinked network, resulting in a cured polymer with improved mechanical properties, chemical resistance, and thermal stability.
There are several types of curing agents, each with its own unique properties and applications. The most common type is amine-based curing agents, which react with the epoxy functional group to form a secondary amine and an alcohol. This reaction is exothermic and can be accelerated by heat, making it ideal for high-temperature applications.
Another type of curing agent is anhydride-based, which react with the epoxy group to form a cyclic acid anhydride and a hydroxyl group. These curing agents are typically used in applications where water resistance is critical, such as marine coatings and adhesives.
Other types of curing agents include phenolic, acid, and catalytic curing agents. Phenolic curing agents are used in high-temperature applications, while acid curing agents are used in low-temperature applications. Catalytic curing agents are used to accelerate the curing process and are typically used in combination with other curing agents.
The choice of curing agent depends on the specific application requirements, such as cure time, cure temperature, and final properties of the cured polymer. It is important to choose the correct curing agent to ensure that the final product meets the desired specifications.
In summary, curing agents are essential components of many polymer systems, including epoxy resins, and play a critical role in improving the mechanical, chemical, and thermal properties of the cured polymer. The choice of curing agent depends on the specific application requirements and must be carefully considered to ensure the final product meets the desired specifications.
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