What is table tennis made of? How to make table tennis?

Celluloid Chinese name: celluloid.

Product Name: celluloid

Chinese name 2: nitrocellulose plastic.

Physical and chemical properties Main ingredients: Pure.

Appearance and properties: colored or colorless transparent or opaque flakes, soft and elastic.

Relative density (water = 1):

Ignition temperature ( ) 180

Solubility: Insoluble in water, benzene, toluene, soluble in ethanol, acetone, ethyl acetate.

Main uses: Mainly used in the manufacture of table tennis balls, glasses frames, toys, pen holders, decorations, etc.

Other physicochemical properties: >75

Health hazards: No data available.

Explosion Hazard: This product is flammable.

Hazardous characteristics: It is very flammable in case of open flame and high heat. If the heat does not dissipate, it will cause spontaneous combustion.

Celluloid is a type of plastic, which is made of rubber wool (nitrocellulose with low nitrogen content) and plasticizers (mainly camphor), lubricants, dyes, etc. Transparent, shiny, can be dyed in various colors, flammable. It is used to make toys, stationery, etc., and was formerly known as false ivory.

Table tennis is a special production base, a special voucher production base for robot supplies, and Cha Yousheng is not very easy to do if he doesn't have to accumulate his own defeats.

How to make table tennis? I think he doesn't need you to do table tennis, he needs to buy it, it seems to be difficult.

How to make table tennis? As long as you like, you can play table tennis, table tennis, table tennis is our national sport.

Table tennis balls are made of celluloid.

Diameter mm, weight grams, white, yellow or orange.

Celluloid Colored or colorless transparent or opaque flakes that are soft and elastic.

It is capable of molding at the boiling point temperature of water; It can be cut, drilled, or sawn at lower temperatures; It can be a hard clump or made into a soft sheet (it can be used to make shirt collars, children's toys, etc.). Thinner and tougher sheets could be used as substrates for colloidal silver compounds, making it the first practical photographic negative.

Now its most common use is to make table tennis, other uses are in the chemical industry, aerospace, machinery, printing and dyeing, etc.

This product is flammable. It is very flammable in case of open flame and high heat. If the heat does not dissipate, it will cause spontaneous combustion.

The main materials are wood, white pine, cypress, ayous, limba wood and other wood-based, and the so-called high-end is very thin. It depends on what brand of racket it is, and it's better to have cypress wood.

The table tennis ball is made of two semi-circular balls, and a good table tennis ball is heated when it is glued, so there is a smell of plastic and glue inside.

So, what did the world's first table tennis look like? Who was the first to play this ball?

On our planet, there is a place called South America, which is the home of natural rubber. There are many rubber trees there, which cut the bark and shed milky white sap, which the local Indians called "the tears of the tree". They wait for the milk to solidify, rub it, and it becomes a small elastic ball.

Every night groups of Indians get together, sing, dance, and have a great time tossing around with this solid rubber ball.

In the 15th century, the explorer Christopher Columbus arrived here and was so curious that he brought the rubber ball back to Europe and presented it to the king of Spain. The people in the palace also thought it was fun to play with it. However, this kind of ball will become soft and unclean when exposed to a little heat.

So someone made a small plank and held it in his hand and slapped it. In this way, although the earliest table tennis balls and paddles existed, they had not yet entered the interior.

After a few more years, some aristocrats, in order to boast of their wealth, hired 54 craftsmen to carve table tennis balls out of ivory. This ivory ball is harder than rubber balls, and it is also elastic and does not deform. However, the cost is too high for ordinary people to afford.

The ivory ball makes a clattering sound when it hits the bat, which is very nice. So, it was hoped that a material would be found to replace ivory.

In 1893, the American Goodyear invented the rubber vulcanization technology, which improved the elasticity and solidity of rubber, so that the hollow ball was made. Hollow balls are fun, but lighter, and are often blown away by the wind when playing outdoors. Some people set up on the table indoors, two people facing each other and holding wooden planks to push them around.

This is probably the beginning of a sport like table tennis.

In 1869, the American Helit was hired by a company to study alternative materials for table tennis. He thought: too little rubber is taken from rubber trees, and ivory is expensive.

Can you use very cheap cotton? Helit treats cotton with chemicals such as alkali, and then reacts with nitric acid, camphor, etc., to finally make a new material called celluloid, or false ivory.

Celluloid is light and malleable. Just put this false ivory material in a mold and press it into two semi-round balls. Then use adhesive to close the ball blank, and after passing through the circular heat press, a small round table tennis ball is made.

Table tennis is afraid of high temperatures, squeezing, and open flames. It will soften and deform at 80 hours, so the flattened ping ball can be restored by soaking it in hot water at this temperature.

Although table tennis is small, it is fast, varied and technically demanding. In particular, the exercise of judgment requires athletes to be quick and grasp fleeting opportunities, which is very beneficial to cultivating the spirit of tenacious struggle. Therefore, table tennis has become a worldwide and universal sport.

Now, the ITTF has changed the use of orange balls in table tennis.

The table tennis ball is made of two semi-circular balls, and the table tennis ball is heated when it is glued, so there is a smell of plastic and glue inside.

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