Produce high-performance sealing materials like paper

[China Packaging News] In the early summer, the demonstration workshop of China Pulp and Paper Research Institute Co., Ltd. roared, and the pink composite material on the production line rolled into rolls. Looking at the non-asbestos fiber composite sealing material that is rolling forward in front of the randomizer, Zhuang Jinfeng, general manager of the Sealing Materials Division of the China Pulp and Paper Research Institute, breathed a sigh of relief. "After years of hard work, this manufacturing basic raw material can no longer rely on imports. . "

Fiber sealing material is a basic component material for manufacturing various engines, vehicles and mechanical equipment. It is mainly used for sealing connection of industrial production process equipment, pressure vessels, piping systems, etc. in chemical industry, petroleum, electric power, medicine and so on. With the continuous development of the economy, China's demand for sealing materials has grown rapidly. It is regrettable that the quality of domestic related products is far from the international level. The high-end paper-making method of asbestos-free sealing materials was once completely monopolized by foreign imported products.

" Fiber sealing materials include two types of asbestos fiber products and non-asbestos fiber products. " Zhuang Jinfeng said that asbestos fibers are cheap and expensive, and were once the only choice for the fibers used in the manufacture of sealing materials. Later, the hazards of asbestos fibers to human health gradually It is recognized that it is gradually banned in developed countries.

At present, most of the domestic fiber sealing materials are still asbestos fiber products and rolling method products, and the backward manufacturing technology is an important reason. According to Zhuang Jinfeng, there are two main production methods for fiber composite sealing materials: rolling method and papermaking method. Rolling method production process needs to use toluene, gasoline and other flammable, explosive and harmful organic solvents as production media, which not only has poor safety, but also easily pollutes the environment and has low production efficiency. The paper-making method is used to produce asbestos-free sealing materials, without the use of organic solvents, low cost, low pollution and high efficiency. " This kind of material has already achieved large-scale and continuous production on a long-mesh paper machine in Europe and the United States. However, because it involves interdisciplinary knowledge, we need to understand both papermaking and materials, and we have never been able to create the quality of others. " Zhuang Jinfeng said .

Zhuang Jinfeng, who studied papermaking, had been engaged in sealing materials and sealing technology research for 14 years at Interface Corporation in the United States before returning to China .

"The rolling method is equivalent to pressing various materials and dough into pancakes, and has to use organic solvents, which has great environmental hazards and high production costs. " For the pain points of the production of sealing materials, as the " 12th Five-Year " National Science and Technology Support The person in charge of the project " Development and Industrialization Demonstration of Non-asbestos Fiber Composite Sealing Materials " , Zhuang Jinfeng led the team to tackle the problems in design, process and ingredients.

Time is not disappointed. Experts from the fields of the Light Industry Association, the Paper Society and other fields have identified the high-performance paper-making method asbestos-free fiber sealing material developed by the research group. The product quality and manufacturing technology have reached the international advanced level and will replace imported similar products and domestic rolling methods. Asbestos products are widely used in various engine seals.

" Taking refrigerator compressors as an example, 80% of the components have been localized, but a small gasket material - high-end fiber sealing material, is also completely dependent on imports, which poses a certain threat to the healthy development of the industry. " Zhuang Jinfeng It is said that the research group has successfully developed and produced and sold more than 20 new products of non-asbestos sealing materials in six categories including general-purpose, high-density, super-density, special-purpose, heat-resistant and after-sale types , which can be used for domestic gasoline engines. , Diesel engines, gearboxes, air compressors, refrigeration equipment and other manufacturers, involved in the industry of water, oil and other media sealing, to provide complete sealing technology solutions.