Honeycomb structure is made by human beings following the principle of hexagon honeycomb built by natural bees. The earliest applications to the military, the solid and light aluminum honeycomb panels created supersonic aircraft and large transport aircraft, making a qualitative leap forward in the aviation industry. After the Second World War, it turned to civilians to produce paper honeycomb structural composites.
First, the status quo of China's paper honeycomb composite industry development China began to develop this paper honeycomb composite material in the late 1980s, lagging behind for more than 40 years.
It is estimated that the current national production capacity of honeycomb paperboard is approximately 3 million square meters of annual output of honeycomb paperboard. About 50% of these honeycomb paperboards are used for building materials (such as door panels), 50% for pallets, crates, and toilet bowls.
Most of the honeycomb paper core and composite board production equipment developed in China originated from the vertical adhesive-bonded honeycomb paper core type of imitation He Lisheng. Only a certain company in Zhejiang is a horizontal adhesive-bonded paper core of the imitation printing equipment.
Second, domestic and foreign paper honeycomb composite material industry level comparison 1. The main technical parameters of the paper honeycomb core and the paper honeycomb composite board production equipment at home and abroad are basically similar, just because the customer needs are different in the height of the paper honeycomb core and the thickness of the honeycomb paperboard board.
The thickness of honeycomb paper core is 10-40mm in China and 10-150mm in foreign countries. The thickness of honeycomb paperboard is 12-42mm in China and 12-152mm in foreign countries. It can reach 20-50m?m in domestic and foreign honeycomb core papermaking core speeds. , Plate production speed up to 15m?m in.
The production lines of foreign core making and plate making are often separated from each other by two independent production lines and operated independently. Each production line can be adjusted to its optimal production speed. The domestic core manufacturing and the production of the plate are combined into one, and the entire production line is produced. The speed is controlled by the board speed. The best speed is only 5-8m?m in.
2. Foreign equipment has a high degree of automation, processing accuracy and appearance are better, and the technical stability is good.
In order to reduce the cost of domestic equipment, there is no comprehensive application of hydraulics, pneumatics, program control and computer automation and other high-tech, but only to achieve the centralized control of the mechanized production of electrical equipment, and thus the equipment processing accuracy is not high, the production of paper core is often not equilateral hexagonal, When the composite board is stretched, the tightness difference is large, and even there is degumming. The utilization rate of paper is low, generally about 80%. The paint, electroplating, and aesthetics of the entire production line are not as good as those of foreign products.
3. In terms of price, foreign equipment is much more expensive than domestic ones. For example, the purchase of a paper honeycomb core and composite board production equipment, Israel I. M. A engineering company quoted 1.1 million US dollars (a total of 9.24 million yuan), the United States OM S company is 1.2 million US dollars (a total of 10.4 million yuan), and the Dutch Li Sheng company's quotation of nearly 20 million yuan.
The price of domestic equipment is between RMB 220-3.5 million. The price is much cheaper than that of foreign countries. Even if it is a newly developed and highly automated equipment, its price is always much cheaper than that of foreign countries.
4. Foreign production uses wood pulp paper. Its honeycomb paper core strength is good. Most of the domestic raw materials use straw pulp. The strength of cellular paper core is slightly lower than that of wood pulp products, but the source is abundant and the price is low, which is conducive to forest protection.