The main chemical components of spider silk are glycine (NH2-CH2-COOH), alanine (NH2-CH[CH3]-COOH) and a small amount of serine (NH2-CH[CH2OH]-COOH), plus other amino acid monomers protein molecular chain. The fine and soft spider silk has excellent elasticity and strength. On the one hand, there are irregular protein molecular chains in the spider silk, which makes the spider silk elastic. On the other hand, there are regular protein molecular chains in spider silk, which makes it strong.
There is a lot of silk pulp in the spider's stomach, and there are small holes in its tail. When making a web, the spider spits out silk pulp. Silk pulp condenses into viscosity as soon as it meets air. No matter what kind of flying insects, once they hit the net, they can't get away. Spiders often secrete a layer of oil on their bodies and feet, which is not sticky.
According to scientists' research and experiments, the rope made of spider silk is stronger than the stainless steel strip with the same thickness. It can bear five times the weight of steel bars without being broken. Although some spider silk is as thin as hair, don't underestimate its ability and function! Spider silk is very elastic. Spider silk with a diameter of only one tenth of a millimeter can be stretched more than twice before breaking. In addition, spider silk is made in protein, so as long as the silk pulp is not exhausted, it can be spun.