In the process of ITTF promoting the new material 40+ table tennis, there are two camps: stitched ball and seamless ball. Both balls have passed ITTF certification and can be used at any level.
Seamless ball is a patented technology. Mr. Zhang Huilun, the inventor and holder of this patent, first cooperated with Xu Shaofa, a famous table tennis veteran, to launch the Xu Shaofa brand seamless ball. Later, many manufacturers cooperated with it, such as Pairio, Galaxy, 729, imported brands such as Meng Jiao and Euler. There are more than 20 kinds. Many brands of seamless balls have been launched. Because patents are involved, the actual production plants are the same, and the differences between brands are subtle. Seamless ball, with uniform ball quality, striking resistance and stable bounce, is deeply loved by professional and amateur golfers.
20 16 Spanish "Veterans Cup" championship is a seamless table tennis of Xu Shaofa brand.
20 17 National Games will use 729 brand seamless table tennis.
Double happiness, Pisces, nittaku, Butterfly and other table tennis equipment manufacturers have not reached an agreement on the patent cooperation of seamless ball. As a result, they introduced their own new materials, such as sewing balls, and passed the certification of the Table Tennis Federation. As the biggest sponsors of table tennis events, manufacturers such as Double Happiness and Butterfly have a strong voice in the use of the ball. Most games still use new materials, such as sewing balls.
20 15 world table tennis championships used butterfly 40+ new materials with sewing balls.
20 16 Olympic Games used double happiness Safran 40+ new material with seam ball.
Nittaku 40+ new material with seam ball was used in the 20 17 Asian Championship.
ITTF intended to promote sewing balls with new materials after the 20 12 London Olympic Games, but the appearance of two camps disrupted ITTF's plan.