Football consists of several parts. What is the material of each layer?

The official ball for the 2008 European Cup is the "European Pass". Let's take it for example. If we cut a biography of Europe, we will find that it is composed of many layers like a sandwich. The innermost layer is a latex airbag, the second layer is a football skeleton woven by glass fiber, the outer layer is polyurethane hollow microsphere foam with a thickness of about 0.7 mm, the fourth layer is an intermediate coating, the fifth layer is an outer skin made of artificial leather, and the outermost layer is a transparent protective coating. The role of the football skeleton is to ensure the formation of a sphere, improve the strength of the football, and make the football not deviate due to the influence of the unbalanced airflow around it when flying in the air. Polyurethane hollow microsphere foam is composed of tiny inflatable foams with the same size, which can quickly restore the football to its original state and ensure the flight stability. This is the power balance technology used for the first time in Team Star. The intermediate coating provides extra elasticity and toughness for football, making it stronger. Although Adidas began to use artificial leather as football skin from 1984, Eurobiography used "PSC-Texture" structure on the skin for the first time. This is a new patent of Adidas, and PSC stands for power, rotation and control respectively. It improves the handling performance of football by making tiny bumps on the leather surface. It can provide more strength through friction with sports shoes, and it will also provide higher accuracy when it comes into contact with the goalkeeper's gloves. The outermost protective coating is a protective material widely used in greenhouse films before, which can provide very good wear resistance and make the football surface look shiny. Most of the materials used by Eurocom come from Bayer Material Science and Technology (BMS), a company with a long history and advanced technology. Of course, in the end, adhesive is needed to assemble the football. "Eurobiography" still uses thermal bonding technology, which is also a patent of Adidas. This water-based polyurethane heat-activated adhesive is also waterproof, which can ensure that the weight change will not exceed the standard because of the water absorption of football in any weather.