Summoner is Going c239.2
「If you use sulfur vulcanization with natural rubber, a 2mm thick sheet will take 15 minutes with heat around 150 degrees, this should be enough.」
「 milimeter was it?」
「Hmm let us see… And the thicker of the object that needed to be vulcanized, it would take more time…」
「How long it would take?」
「Depends on the size. It can be said, sometimes it would be a sad to see you smile.」
Though it seems extremely simple.
The formulation was different.
And if the result is still not stable, then we can vulcanizing a thinner rubber plates and pasted them together.
But for that, the adhesive technology would be needed.
That was why, it would be better to vulcanizing at once.
「Roughly speaking we will try to reduce the temperature 10 degrees while on the other hand the vulcanizing time would be double.」
「Double?」
「Depend on the size though. Although the shape will remain the same.」
Not only that.
The pressure as well.
It also possible to preheat the mold in advance.
We should any changes that affect the heat.
I wonder, if conventional sulfur vulcanizing was this complicated?
The problem is the thickness of the item.
If the shape is flat, then it would be easy.
Anyhow, since we don’t use any accelerator, I guess 90 minutes vulcanizing would need around 125 degrees heat?
I believe that is appropriate?
But, even so.
This vulcanizing was really a hard thing to do!.
How much carbon do we need?
No, how much sulfur to we also need?
The hard fact was that, a great amount of force was needed to make a form out of it.
Even if we manage to vulcanizing it, it would still be difficult to process it into armor.
A shield might be good.
「But, what are the required characteristic in the first place?」
「Emm… It has rubber-like rebound but yet last as long as a tire…」
「A tire was it?」
Somehow, it was indeed very abstract.
And if the ideal is a tire, the hurdle will rise at a stretch.
This was a huge problem.
It would become harder to explain unless one understand at least understand the basic.
「May I have your time a little bit? Maybe I should explain it in details about what I said earlier?」
「It’s okay!」
「Then, I guess it would be easier to explain by using rubber product? Anything is fine…」
「How about condom!」
Muto-kun I would like to ask something.
I really want to ask a question.
Why does the conversation turn into condom here?
Was it because you are so familiar with it?
Well, it is fine and all…
Sakura-san, please don’t look at us with that delicate expression.
Well, in a sense, condom was indeed an easy object to explain.
What function are needed from a condom?
Of course, it is to capture semen without leaking during sexual intercourse to avoid the pregnancy.
Naturally, this is the most important function required by condoms as a product.
Then, what about the buyer position when they want to buy it?
Of course, they buy it on the assumption that the product could be used for contraception.
With a wide variety of product lined up, which one should one buy?
Also, what about the point of view of the producer?
What should they do to appeal and sell it to the buyer?
That is right…
There are other requirment.
For example you ask?
It was the price.
How cheap the product was also an important factor to think about.
Not to mention, there is also the thought about be as thin as possible.
Let me ask you, will a man buy a thick condoms?
Next, it would be when worn, it should not be too tight.
After all, men won’t buy it again if making them feels weird.
Next, it would be not making the product easy to get loose.
If it leaks sperm even just a little bit, it would interfere with condom’s most important functions, and it would be troublesome to clean it up.
A good flexibility.
So that you don’t have to apply gel or lotion.
It also need to be fun to use.
Sometimes you want to buy something just because the goods were colorful, no?
Do not have any weird smell.
Not just women, I believe the majority of human didn’t like the smell of a rubber though?
Easy to handle packaging and design.
That is surprisingly important isn’t it?
To say it with the simplest explanation, a condom is just a bag made using rubber.
Roughly this is how much that I can think of rubber as a condom.
There are might still be something else that I missed.
As long as there was a demand, a variety of product are competing in the world by using the most cutting edge technology.
Otherwise, there won’t be this much condom seres in the real world.
Sometimes the demand would be too diverse, even for condoms.
That was what I really think so.
What am I trying to say you ask?
What I want to say is that it would be dangerous to think about the object application after creating it.
One must created things after thinking carefully about the application of the product.
If not, it would be the same as a management without management policy.
Or product development without product planning.
Development without research.
Research and development without having clear demand.
To do things that way, it would be crazy waste of time and money.
It was like doing something without purpose.
Having rubber-like rebounding capability but last as long as a tire, was it?
Perhaps, we could create it accidentally even if we try it carelessly.
After all, in the real world, those product were common.
But, that was not the problem here.
It would be a big loss if other player who are thinking of using natural rubber manage to optimize their product first., see?
Now, let us back talking about condom.
The required characteristic has been listed, but would a producer manage to satisfied them all?
No, of course.
Something could be achieved only because we sacrifice other function.
For example thickness.
How do we make it thinner?
How thinner will we go?
If it was too thin, and it breaks after being used, the product would means fail.
Somewhere, we have to make a compromise.
When it comes to thinness and strength, how about adding carbon to reinforce the product?
This time, flexibility would be sacrificed.
To some extend, we might be able to stretch it but, it would be hard to use it.
However, if we did not reduce the thickness as much as possible, it might interfere with the sexual intercourse.
Not to mention, will anybody willing to use a condom with the smell of a tire?
As for me, that would be a complete impossible…
For example, how about the smell?
How to suppress the odor while using natural rubber?
There is…
It is natural to remove as much impurities as possible from the sap.
We also need to give up vulcanization using sulfur.
And used peroxide vulcanization system instead.
I think the compounding is top secret for each manufacturer, but when it comes to using natural rubber, many method should be possible to learn.
However, this thing is not versatile either.
The strength of the product is less than using sulfur vulcanization method.
And to maintain the same level of strength, the condom itself will need to be thickened.
But even with all of that, the smell of the rubber does not disappear.
Thus some customer would shy away from buying it.
And how to solve these problem at the same time?
There was away.
And it was to give up natural rubber, and use polyurethane.
Although varius technical problems are solved at once.
Even this method still has a problem.
And the problem was the price, the price was too high.
A circle of evil.
As a result, various types of goods are lined up on the shelf.
A product whose price is in sale.
Product that is only good in design.
A product that only good point is the function.
There was various things but, there is common thing in the way of thinking.
Differentiation.
It can be said that if you look from the other side, it could be said as division of product.
If there is a demand, the product would survive no matter what.
And when the demand is gone, the product would just disappeared, as if melting away.
「If you just make lumps of vulcanization rubber, we can do it. But it would be another matter if you start to ask about functions…」
「It is necessary to design what kind of characteristic, the rubber should have and how to adjust them, even as a shield as well.」
「Indeed.」
Sakura-san is a very understanding person, and she was always very helpful.
Not to mention, she is easy to talk to.
「First of all, I think making a simple sheet first.」
「Sample is it?」
「That is right. A sheet of vulcanized rubber could be made by changing some of the formula. I hope we can immediately grasp the characteristic.」
「The compounding needed is it? 」
「The recipe more precisely…」
「The recipe eh?」
Acha…
My knowledge is a only partial.
When I was taught rubber compounding, when I ask the recipe, I got scolded.
Such habit was inevitable.
「The mixing recipe is fine you know? For example, how much do we need the other ingredient if we make 100 polymer.」
「Polymer is it?」
「In this case, the natural rubber resin could be used as well, no…?」
The description is omitted.
I believe it was not that bad though.
When we talk about polymer, it was the monomer polymer
I think monomer ws the smallest unit of molecular chain.
What kind of formula should we use?
Are we only going to use black carbon and sulfur?
No vulcanization acceleration.
We did not use any vulcanizing aid.
There was no antioxidant as well.
If we want to make some improvement, maybe we should add oil?
And instead of antioxidant, maybe natural wax?
I can only come up with such a thing.
Synthetic rubber was it?
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Summoner is Going
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Thanks for the treat.