Medium and high-end badminton are made of natural cork heads, and cork heads can be roughly divided into three categories: integral cork heads, composite cork heads, and recycled cork heads. There are currently two types of ball heads: one It is an all-cork ball head, and low-quality cork materials are easier to crack. One is a cork composite (man-made material) of Taiwan fiber cricket ball head, which has better strength. The structure of Taiwan fiber board ball head: The upper layer of the ball head is about 13MM of chemical fiber material, and the lower layer is cork. There are three kinds of softwoods in the lower layer: 1. Small-grain crushed cork with hardness below 60 Shore (patent of Taiwan Zhonghua Cork Factory); 2. Large-grain crushed cork with hardness above Shore 60 (patent of Shanghai Dongli Ball Head Factory) 3. 13MM overall cork (patented by Shanghai Chongming Island Cork Factory) has a hardness of more than 60 Shore. Judging from the use of the above three ball heads, the play resistance is far better than that of all cork, because one of the main reasons is that the ball head of cork will crack, and the ball head of Taiwan fiberboard basically does not crack. situation arises. The ball head with better feel is the latter two, the sound is crisper and not sticky at the same time. It is generally believed that the small particle crushed cork ball head must not be as good as the latter two. There is a belief that the composite cork is the complexcork badminton, and the Durability is increased by more than 30%.