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PostPosted: 31 Dec 2017, 10:46 
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I hear that Nittaku is goin to release another ball called the Nittaku Nexcel 40+m will will be made from a different material, other than current (2017) ABS.

Has anyone else heard anything about this?

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PostPosted: 31 Dec 2017, 11:15 
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My head is spinning from sheer number of ball variants. I'd love to have some stability!

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PostPosted: 31 Dec 2017, 17:03 
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:rofl: So many balls, but where are the mass produced orange balls ? :rofl:

I would love to have the 7 dragon balls that we need to collect to summon Ma Long instead of ShenRon!

:rofl: :lol: :rofl: :lol:

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PostPosted: 01 Jan 2018, 10:27 
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(this is a robotic translation from Russian, sorry .)


In 2000, the ball manufacturers had changed from 38mm balls to 40mm, and they tried to keep the thickness of the shell same so as to retain the nature of the rebound same.
According to these calculations the weight of the 40mm ball was decided at 2.78 grams. This was to provide near the same shell thickness as the 38mm ball.

In 2016, ABS plastic came out on market, this plastic has a low specific gravity compared to celuloide 1.10 g/cm3 vs. 1.40 g/cm3 and therefore, the new balls have a very thick shell. Here's the main reason that plastic plays differently than celluloid.

If use of plastic of high specific gravity and make the wall of such thickness as celluloid then plastic balls will play almost like celluloid. Until then, we're bound to this ABS plastic and we have much grief with this ball..

Recently, a Japanese research group made a comparative analysis of the Nittaku 40 (celluloid) and Nittaku Premium 40+ (plastic) and they definitely proved that the plastic has a different bounce and a different ballistics. It's interesting to read and need to learn each coach and each athlete.

https://www.researchgate.net/profile/Sh ... ectory.pdf


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PostPosted: 01 Jan 2018, 22:28 
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<rant>The worst thing (for our sport IMO) is to keep changing. I suspect some of us don't even remember how celluloid plays... and if we've been playing with ABS balls for long enough, we may not even like the celluloid again (until we get used it again).
The damage is done (by the ITTF) by forcing a change to bigger balls. This was done without consultation of all the stakeholders, and without a vote.

It's too late to change back (manufacturers have made major investments in new equipment, and another change or change back will incur further costs again, which WE will be paying for), so I'd rather stick to current balls, which are quite reasonable IMO, and not be obsessed about further research into yet another new ball. It's NEVER going to play like the smaller celluloid balls, so lets just have some stability!
</rant>

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PostPosted: 19 Feb 2018, 11:41 
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I for one would welcome new material for the 40+ ball. The current ABS balls are too heavy because of the wall thickness. It's harder to spin and lowers the speed. I have to work a lot harder to put the same amount of spin on the shot. I find a lot of shots floating long or sinking into the net because I didn't spin it hard enough.

If the new material would allow non-cellular balls to play the same as cellular I'm all for it.


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PostPosted: 19 Feb 2018, 12:04 
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Gtsnake wrote:
If the new material would allow non-cellular balls to play the same as cellular I'm all for it.

I agree completely, but I don't believe that's possible. Even if they could come up with a material that similar to celluloid, they still have to make them larger (plastic balls have a different tolerance requirement to celluloid), which means the walls will probably be thinner because the weight must remain the same. The larger size alone ensures it's not going to play the same as celluloid, which are on average 0.5mm smaller.
Still I have hope that they'll continue to improve... but from Nittaku or Butterfly they're probably going to be expensive.

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PostPosted: 20 Feb 2018, 09:22 
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SOME MORE IMPROVEMENTS TO THE BALL IS ONLY A MATTER OF TIME.

Xu Xin, the king of looping play, displeased with the current DHS products and he cries for a more spinny plastic. DHS shall respond soon.

I made some measurements for a number of balls, DHS D40+ plastic and some of celluloid. And the difference in the wall thickness is huge and glaring. 0.5mm plastic wall vs. 0.35mm celluloid.

The thicker wall does affect ball's rotation speed, I guess.
If DHS finds a way to reduce the thickness on pastic sphere, the overall spin of the plastic balls should grow up, to a better satisfaction of all the skilled loopers, as Xu Xin. :D:


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PostPosted: 20 Feb 2018, 14:43 
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igorponger wrote:
In 2016, ABS plastic came out on market, this plastic has a low specific gravity compared to celuloide 1.10 g/cm3 vs. 1.40 g/cm3 and therefore, the new balls have a very thick shell. Here's the main reason that plastic plays differently than celluloid.


I don't buy this at all. If people had to choose between the old cellulose acetate balls and the new ABS ones all indications seem to be that they prefer the ABS balls.

Iskandar


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