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Water Seal
Three Water
Yefeng Ying 1, first into a wide, Chan King Wah 2
(1. Hong Kong Restoration Group, Restoration Environmental Coatings Co., Ltd. Shenzhen, Guangdong, Shenzhen 518118; 2. China International Marine Containers (Group) Co., Ltd. R & D Center, Shenzhen 518067)
Abstract: This paper briefly describes the technical requirements of container coatings, container coatings focuses on the development of the three water-based technical difficulties, or corrosion resistance, workability and cost, and the corresponding solutions.
Key words: water-based container coatings; corrosion; construction; cost
Introduction Environmental protection and processing costs as the reason, container manufacturing shift to China, provided China with a large number of job opportunities and Economy Income, but also brought serious environmental pollution. Currently the container industry to use the basic paint Solvent Type, manufacturing process releases large amounts of VOC. According to statistics, international container production and sales in 2007 reached 3.92 million TEU, of which China produced about 3.746 million TEU, accounting for 95.6% of total use of solvent-based paint container of about 300 000 t, this can generate about 15 10 000 t Xylene Kinds of organic solvent emissions. With the establishment of various environmental laws and regulations, environmental protection has become necessary container coatings. Waterborne Coatings Water as solvent viscosity can be adjusted according to the construction, which in construction is convenient, easy to control the thickness and low loss characteristics as the development trend of container coatings, and research priorities. International Container Lease Association (IICL) also held a special session on the container production and application of water-based coating developed the proposal. In recent years, many companies home and abroad of making the container of water-based paint. The main problem now is that the container rising raw speed, beat the fastest production has reached a per TEU 3.5min, which undoubtedly water-based container coatings more difficult. Development of water-based container coatings need to address the corrosion resistance, construction performance of production lines, coating the high cost of the three technical problems, as well as capital, management and other issues. At present, to fully meet the requirements of the three coating lines all water containers is also one of the few paint manufacturers, the Hong Kong Restoration Group is one of them. I water the past few years has been conducting research for container coatings, in which mainly discusses technical problems, hope to ongoing research in this area of research provide some help.
1. The technical requirements for container coatings
The operational needs of container back and forth from land to ocean through the whole process, in international transport and logistics system will play an increasingly important role. Container coatings required to withstand any kind of harsh on Earth's climate conditions, to adapt to any mode of transport. Performance requirements for container coatings: anti-corrosion properties to pass KTA detection; requirements coating has good wear resistance and flexibility; resistant to the performance of a variety of environmental changes, there should be a strong anti-powder resistance, color retention, Paul Light of; has good workability, high efficiency to meet the production volume needs; box should have abrasion, corrosion, solvent properties, FDA certificate should also be made to facilitate transport Food ; In accordance with international practice, the container manufacturer and supplier to provide a guarantee to the main box. Ensure that within the container 5a corrosion coating, peeling area is not more than 10% of the entire film area. In addition, some container manufacturers also asked to complete coating of salt spray test 1000h. The following is the current most efficient, the fastest pace of the production line on the specific requirements for container coatings:
(1) each process for the production of Rhythm 3 ~ 6min, construction without environmental impact, required coating adaptability;
(2) using high pressure airless spray, paint required for the construction of wet-wet process;
(3) coating a three-baking, baking temperature 60 ~ 80 , about 15 ~ 40min; demands good film drying can not foam;
(4) baking cooling of about 0.5 ~ 1h for labeling, labeling requirements Do not tear film;
(5) Bake about 1 ~ 1.5h after cooling for water sealing test, asking not bubble film;
(6) check box when asked coating and smooth surface without sagging, cracking, pinhole-free, clear coating shrinkage and other defects.
Shows the performance of construction container coatings, coating performance requirements of high demands Paint Factory Home use of the environment according to different adjustments. General paint coating manufacturer will send representatives to the assembly line for 24h services to paint the scene quickly solve problems, to ensure the productivity of container manufacturer.
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